Switching unit of switching device and switching device

Abstract

The present disclosure relates to the technical field of switching devices, and specifically relates to a switching unit of a switching device and a switching device. The switching unit comprises a movable contact portion, stationary contact portions and arc-extinguishing assemblies, wherein the movable contact portion is disposed on an actuation assembly; the arc-extinguishing assemblies are linked with the actuation assembly; as the movable contact portion and the stationary contact portions are closed or opened, arc-isolating portions of the arc-extinguishing assemblies can be selectively located at an avoidance position or an arc-extinguishing position, such that, when at the arc-extinguishing position, the arc-isolating portions form physical isolation between the movable contact portion and the stationary contact portions to realize arc-extinguishing; and the arc-extinguishing assemblies and the actuation assembly are linked by means of a toothed transmission mechanism. The switching device has the switching unit. The linkage between the arc-extinguishing assemblies and the actuation assembly enables the arc-isolating portions to move along with the movement of the actuation assembly, thereby realizing effective arc extinguishing and allowing timely position yielding to facilitate the reliable closing of the movable contact portion and the stationary contact portions; in addition, the toothed transmission mechanism operates reliably, thereby improving the operational reliability of the arc-extinguishing assemblies and ensuring that the switching unit has a good arc-extinguishing effect.

Description

Switching unit of switch device and switch device

[0001] The present disclosure claims priority to Chinese Patent Application No. 202410718156.7, filed on June 04, 2024, Chinese Patent Application No. 202411278621.6, filed on September 12, 2024, Chinese Patent Application No. 202411278882.8, filed on September 12, 2024, Chinese Patent Application No. 202422342366.9, filed on September 25, 2024, Chinese Patent Application No. 202411360191.2, filed on September 27, 2024, Chinese Patent Application No. 202411738583.8, filed on November 29, 2024, Chinese Patent Application No. 202520240510.X, filed on February 14, 2025, Chinese Patent Application No. 202510162270.0, filed on February 14, 2025, the contents of all of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of switch device, in particular to a switching unit of switch device and switch device. BACKGROUND

[0003] Switch device refers to the switch device in the term and definition of GB / T 5226.1-2019 / IEC 60204-1:2016, i.e. an electric appliance for making or breaking the current of one or several circuits, the specific element form of which can be a circuit breaker, a relay, a disconnector, etc. The switch device such as disconnector and circuit breaker is generally provided with arc extinguishing structure to extinguish the arc generated in the breaking process of the moving contact and the stationary contact, and in the prior art, an insulating arc separation piece movably arranged is used to physically separate the moving contact and the stationary contact to realize the arc extinguishing function. Specifically, when the moving contact and the stationary contact are closed, the arc separation piece moves to one side of the closing point of the moving contact and the stationary contact; when the moving contact and the stationary contact are broken, the arc separation piece moves between the moving contact and the stationary contact to extinguish the arc. Chinese Patent Document CN217061990U proposes a forced arc separation of circuit breaker using an arc separation piece, which indirectly forms a cooperation relationship with the moving contact through the contact support, and moves to a avoiding position with the contact of the moving contact and the stationary contact, so as to facilitate the reliable closing of the moving contact and the stationary contact; when the moving contact moves away from the stationary contact, the arc separation piece is reset to the arc separation position under the action of the spring. The arc separation of this structure relies on the reset of the elastic piece, and after long time use, the elastic piece will fail or the elastic force will decrease, and the reset reliability is poor, resulting in insufficient arc extinguishing effect of the circuit breaker. SUMMARY

[0004] The switch unit of the switch electric appliance and the switch electric appliance have linkage relationship between the arc extinguishing structure and the movable contact part, optimize the arc extinguishing structure, and improve the arc extinguishing reliability of the switch electric appliance.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present disclosure includes:

[0006] The switch unit of the switch electric appliance and the switch electric appliance have linkage relationship between the arc extinguishing structure and the movable contact part, optimize the arc extinguishing structure, and improve the arc extinguishing reliability of the switch electric appliance.

[0007] In one embodiment, the action execution assembly is a rotating assembly, including a rotating disc part, the movable contact part rotates under the driving of the rotating disc part to make the movable contact part close or break away from the static contact part; the rotating disc part is provided with a first transmission gear structure, the arc extinguishing assembly is provided with a second transmission gear structure, the first transmission gear structure and the second transmission gear structure cooperate to form the gear transmission mechanism, and the arc separation part is switched between the avoiding position and the arc extinguishing position under the driving of the second transmission gear structure.

[0008] In one embodiment, the first transmission gear structure is a structure provided outside the rotating disc part and having at least one part of an external gear, and the second transmission gear structure is any one of a straight rack structure, an arc-shaped internal rack structure and a gear structure including at least one part of an external gear.

[0009] In one embodiment, the movable contact part and a part of the first transmission gear structure are arranged in an axial direction of the rotating disc part, the arc extinguishing assembly further includes an arc separation part, the arc separation part includes an arc separation rotating shaft and a plurality of second meshing gears provided outside the arc separation rotating shaft, at least one part of the second meshing gears forms the second transmission gear structure, so that the second transmission gear structure is formed as a gear structure; at least one second meshing gear extends in the axial direction of the rotating disc part to separate the movable contact part from the static contact part to achieve arc extinguishing, so that the second meshing gear for separating the movable contact part from the static contact part forms the arc separation part.

[0010] In one embodiment, the rotating disc is provided with a first meshing tooth for forming the first transmission tooth structure, and the second meshing tooth of the arc separation part is also used to form a tooth-shaped transmission cooperation with at least one of the first meshing tooth, so that the first meshing tooth and the arc separation part cooperatively form the physical isolation barrier.

[0011] In one embodiment, the arc separation part is further provided with a plurality of arc pressing parts, the arc pressing parts are arranged adjacent to the arc separation part along the circumferential direction of the arc separation shaft, and the arc pressing parts are arranged spaced apart along the axial direction of the arc separation shaft, and a groove for accommodating the movable contact part is formed between adjacent arc pressing parts.

[0012] In one embodiment, at least one edge of the arc pressing part is provided with the second meshing tooth.

[0013] In one embodiment, the arc separation part is further provided with a blade part, the blade part is located on the side of the arc separation shaft away from the movable contact part, and there are at least one blade part, and at least one blade part is arranged along the circumferential direction of the arc separation shaft.

[0014] In one embodiment, the arc extinguishing assembly further comprises an arc separation part, the arc separation part comprises an arc separation cover, the arc separation cover is a cover-shaped structure for surrounding the stationary contact part, a part of the arc separation cover forms the arc separation part, the arc separation part further comprises an arc separation shaft and a transmission plate arranged on the arc separation shaft, an edge of the transmission plate is provided with a plurality of second meshing teeth, and the second meshing teeth form the second transmission tooth structure, so that the second transmission tooth structure is formed as a gear structure.

[0015] In one embodiment, a base is further included, the arc separation part is rotatably arranged on the base through the arc separation shaft, the arc separation cover further comprises a first connecting part and a second connecting part connected to the arc separation shaft, the first connecting part is a sheet-shaped structure extending along the axial direction and the radial direction of the arc separation shaft respectively, the second connecting part is a sheet-shaped structure extending along the radial direction and the circumferential direction of the arc separation shaft respectively, and the second connecting part is located at one end of the arc separation shaft close to the base, in the radial direction of the arc separation shaft, the arc separation part is respectively connected to the outer edges of the first connecting part and the second connecting part, so that the arc separation cover forms the cover-shaped structure with an opening away from the base.

[0016] In one embodiment, a reinforcing part is arranged on the surface of the first connecting part facing the stationary contact part.

[0017] In one embodiment, the rotary disc part is arranged to rotate on the base, and an end of the rotary disc part close to the base is provided with an arc blocking part extending in a radial direction thereof, the arc blocking part is located between the base and the arc separation part, and the arc blocking part is located between the moving contact part and the static contact part when the arc separation part is in the arc extinguishing position.

[0018] In one embodiment, the arc extinguishing assembly further comprises an arc separation part in the form of a plate, and a side surface of the arc separation part facing the first transmission tooth structure is provided with a plurality of second engagement teeth forming the second transmission tooth structure, and a portion of the arc separation part corresponding to the moving contact part forms the arc separation part.

[0019] In one embodiment, the arc separation part is in the form of an arc-shaped plate or a flat plate, so that the second transmission tooth structure is correspondingly formed into an arc-shaped internal rack structure or a straight rack structure.

[0020] In one embodiment, the moving contact part and a portion of the first transmission tooth structure are arranged in an axial direction of the rotary disc part, and the second engagement teeth extend along a portion of the arc separation part in the axial direction of the rotary disc part, so that the arc separation part and the second transmission tooth structure correspond to the moving contact part and the first transmission tooth structure respectively in the axial direction of the rotary disc part.

[0021] In one embodiment, the action executing assembly is provided with two moving contact parts, and the two moving contact parts are arranged on opposite sides of the rotary disc part in a radial direction thereof, so that the two moving contact parts move synchronously under the driving of the rotary disc part, the static contact part is two, and the two static contact parts are arranged correspondingly to the moving contact parts, so as to form two groups of contact point groups, and each group of the contact point groups is provided with a group of arc extinguishing assemblies.

[0022] In one embodiment, the switch unit further comprises a base, and the arc extinguishing assembly is arranged on the base, a surface of the base on which the arc extinguishing assembly is arranged is provided with a first isolation structure, the arc extinguishing assembly is provided with a second isolation structure, the first isolation structure and the second isolation structure cooperate to form an isolation structure when the arc extinguishing assembly is in the arc extinguishing position, and the first isolation structure and the second isolation structure partially overlap in a direction of the base facing the arc extinguishing assembly.

[0023] In one embodiment, the first isolation structure is a guide plate extending along a movement path of at least a portion of the arc separation part, and the second isolation structure is arranged on an edge of the arc separation part facing the base.

[0024] In one embodiment, the movement speed of the arc extinguishing assembly is twice the movement speed of the action executing assembly, so that the arc isolation part forms a physical isolation barrier in cooperation with the guide plate during the movement of the moving contact part away from the stationary contact part.

[0025] The technical solution of the present disclosure further includes:

[0026] A switch electric appliance includes the switch unit described above.

[0027] In one embodiment, the switch electric appliance is a circuit breaker or disconnector.

[0028] The present disclosure has the following advantages:

[0029] 1. The arc extinguishing assembly and the action executing assembly tooth-shaped transmission mechanism form linkage, so that the arc isolation part of the arc extinguishing assembly switches between the avoiding position and the arc extinguishing position along with the movement of the action executing assembly, can timely move to the arc extinguishing position to form a physical isolation barrier to achieve effective arc extinguishing when the moving contact part and the stationary contact part are disconnected, and can timely move to the avoiding position to facilitate reliable closure of the moving contact part and the stationary contact part when the moving contact part and the stationary contact part are closed, and the tooth-shaped transmission mechanism works reliably, improving the working reliability of the arc extinguishing assembly and ensuring that the switch unit has good arc extinguishing effect.

[0030] 2. The action executing assembly forms a tooth-shaped transmission mechanism by cooperating the outer gear provided on the rotating disc part with the second transmission tooth structure, and the second transmission tooth structure can selectively adopt any one of a straight rack structure, an arc-shaped inner rack structure, and a gear structure including at least one part of an outer tooth, so that different second transmission tooth structures can be selected according to different needs, making the structure of the arc extinguishing assembly more diversified to meet various needs of the switch unit.

[0031] 3. The arc isolation part is further provided with an arc pressing part, and adjacent arc pressing parts can form a groove accommodating the moving contact part, so that the arc pressing part is arranged on both sides of the moving contact part to facilitate compression of the arc generated on both sides of the moving contact part during the movement of the moving contact part away from the stationary contact part, which is conducive to extinguishing the arc and improving the reliability of arc isolation.

[0032] 4. The isolation structure between the base and the arc extinguishing assembly can fill the gap between them, reduce the possibility of movement of free electrons in the gap, and further improve the reliability of arc isolation. BRIEF DESCRIPTION OF DRAWINGS

[0033] FIG. 1 is a perspective view of a contact part disconnecting state of a switch unit embodiment 1 of the switch electric appliance of the present disclosure.

[0034] FIG. 2 is an exploded view of the embodiment 1 of the present disclosure.

[0035] FIG. 3 is a front view of a contact part closed state of the embodiment 1 of the present disclosure.

[0036] Fig. 4 is a front view of the moving contact movement process of Embodiment 1 of the present disclosure.

[0037] Fig. 5 is a front view of the contact breaking state of Embodiment 1 of the present disclosure.

[0038] Fig. 6 is a perspective view of the arc-extinguishing member of Embodiment 1 of the present disclosure.

[0039] Fig. 7 is a perspective view of the action-performing assembly of Embodiment 1 of the present disclosure.

[0040] Fig. 8 is a perspective view of the arc-extinguishing member of Embodiment 2 of the present disclosure.

[0041] Fig. 9 is a perspective view of the contact breaking state of the switching unit of Embodiment 2 of the switching device of the present disclosure.

[0042] Fig. 10 is a perspective view of the contact breaking state of Embodiment 2 of the present disclosure from another angle.

[0043] Fig. 11 is a front view of the contact closing state of Embodiment 2 of the present disclosure.

[0044] Fig. 12 is a front view of the moving contact movement process of Embodiment 2 of the present disclosure.

[0045] Fig. 13 is a front view of the contact breaking state of Embodiment 2 of the present disclosure.

[0046] Fig. 14 is a perspective view of the contact breaking state of the switching unit of Embodiment 3 of the switching device of the present disclosure.

[0047] Fig. 15 is a perspective view of the arc-extinguishing member of Embodiment 3 of the present disclosure.

[0048] Fig. 16 is an exploded view of Embodiment 3 of the present disclosure.

[0049] Fig. 17 is a front view of the contact closing state of Embodiment 3 of the present disclosure.

[0050] Fig. 18 is a front view of the contact breaking state of Embodiment 3 of the present disclosure.

[0051] Fig. 19 is a perspective view of the arc-extinguishing member of the switching unit of Embodiment 4 of the switching device of the present disclosure.

[0052] Fig. 20 is a perspective view of the contact breaking state of Embodiment 4 of the present disclosure.

[0053] Fig. 21 is a front view of the contact closing state of Embodiment 4 of the present disclosure.

[0054] Fig. 22 is a front view of the contact breaking state of Embodiment 4 of the present disclosure.

[0055] Fig. 23 is a perspective view of the switching unit of Embodiment 5 of the switching device of the present disclosure.

[0056] Fig. 24 is a connection structure diagram of the arc extinguishing structure and the contact member of the arc extinguishing structure embodiment 1 of the switchgear of the present disclosure.

[0057] Fig. 25 is a front view of the contact member in the open state of the embodiment 1 of the present disclosure.

[0058] Fig. 26 is a front view of the contact member in the closed state of the embodiment 1 of the present disclosure.

[0059] Fig. 27 is a partial enlarged view A of Fig. 25.

[0060] Fig. 28 is an exploded view of the partial parts of the arc extinguishing structure embodiment 1 of the switchgear of the present disclosure.

[0061] Fig. 29 is a connection structure diagram of the arc extinguishing structure and the contact member of the embodiment 2 of the present disclosure.

[0062] Fig. 30 is a front view of the contact member in the open state of the embodiment 2 of the present disclosure.

[0063] Fig. 31 is a front view of the contact member in the closed state of the embodiment 2 of the present disclosure.

[0064] Fig. 32 is a perspective view of the disconnector operating mechanism with part of the base hidden and in the open state;

[0065] Fig. 33 is a perspective view of the disconnector operating mechanism with part of the base and the second gear hidden and in the maximum energy storage state;

[0066] Fig. 34 is a perspective view of the disconnector operating mechanism with part of the base and the second gear hidden and in the closed state;

[0067] Fig. 35 is a perspective view of the disconnector operating mechanism with the base hidden;

[0068] Fig. 36 is an exploded view of the disconnector operating mechanism with the base hidden;

[0069] Fig. 37 is a perspective view of the second gear and the linkage assembly;

[0070] Fig. 38 is a perspective view of the split main shaft;

[0071] Fig. 39 is a perspective view of the first shaft segment.

[0072] Fig. 40 is a perspective view of the disconnector operating mechanism with part of the base hidden and the padlock member not pulled out;

[0073] Fig. 41 is a perspective view of the disconnector operating mechanism with part of the base hidden and the padlock member pulled out;

[0074] Fig. 42 is a partial exploded view of the disconnector operating mechanism with part of the base hidden of the present embodiment;

[0075] Figure 43 is a perspective view of the latch and spindle in an unengaged state and the energy storage linkage of the present embodiment;

[0076] Figure 44 is a perspective view of the latch and spindle in an engaged state and the energy storage linkage of the present embodiment;

[0077] Figure 45 is a side view of the latch of the present embodiment;

[0078] Figure 46 is a perspective view of the latch of the present embodiment;

[0079] Figure 47 is a partial view of the slide of the base of the present embodiment;

[0080] Figure 48 is a perspective view of the latch of the present embodiment.

[0081] Figure 49 is a connection structure diagram of a movable contact assembly and a contact support of an embodiment of the present disclosure.

[0082] Figure 50 is a structure diagram of a movable contact assembly of an embodiment of the present disclosure.

[0083] Figure 51 is a perspective view of a movable contact structure of an embodiment of the present disclosure.

[0084] Figure 52 is a front view of a movable contact structure of an embodiment of the present disclosure.

[0085] Figure 53 is a top view of an arc separation structure of a switch unit of an embodiment of the present disclosure in a retreat position.

[0086] Figure 54 is a top view of an arc separation structure of a switch unit of an embodiment of the present disclosure between a retreat position and an arc separation position.

[0087] Figure 55 is a top view of an arc separation structure of a switch unit of an embodiment of the present disclosure in an arc separation position.

[0088] Figure 56 is a structure diagram of a movable contact assembly of another embodiment of the present disclosure.

[0089] Figure 57 is a perspective view of a disconnecting switch operating mechanism of an embodiment of the present disclosure with part of the base hidden and in an open state.

[0090] Figure 58 is a perspective view of a disconnecting switch operating mechanism of an embodiment of the present disclosure with part of the base and the second gear hidden and in an energy storage maximum state.

[0091] Figure 59 is a perspective view of a disconnecting switch operating mechanism of an embodiment of the present disclosure with part of the base and the second gear hidden and in a closed state.

[0092] Figure 60 is a perspective view of a disconnecting switch operating mechanism of an embodiment of the present disclosure with the base hidden.

[0093] Figure 61 is an exploded view of a disconnecting switch operating mechanism of an embodiment of the present disclosure with the base hidden.

[0094] Fig. 62 is an assembled perspective view of the second gear and the linkage member of the embodiment;

[0095] Fig. 63 is an assembled perspective view of the split spindle of the embodiment;

[0096] Fig. 64 is an assembled perspective view of the first shaft segment of the embodiment;

[0097] Fig. 65 is an assembled perspective view of the transmission member and the linkage member of the embodiment;

[0098] Fig. 66 is an assembled perspective view of the transmission member and the contact shaft member of the embodiment;

[0099] Fig. 67 is an assembled perspective view of the transmission member between two contact shaft members of the embodiment;

[0100] Fig. 68 is an assembled perspective view of the linkage member driving two contact shaft members of the embodiment;

[0101] Fig. 69 is an assembled perspective view of the disconnecting switch operating mechanism of the embodiment on one side of two contact mechanisms;

[0102] Fig. 70 is an assembled perspective view of the second gear and the linkage member driving the contact shaft members of the embodiment;

[0103] Fig. 71 is an assembled perspective view of the disconnecting switch operating mechanism of the embodiment between two contact mechanisms;

[0104] Fig. 72 is an assembled perspective view of the disconnecting switch operating mechanism and the operating handle of the embodiment;

[0105] Fig. 73 is a partially exploded view of the operating mechanism of the embodiment;

[0106] Fig. 74 is an assembled perspective view of the disconnecting switch operating mechanism of the embodiment with part of the base hidden;

[0107] Fig. 75 is a front view of the disconnecting switch operating mechanism of the embodiment with part of the base hidden and the connecting member not pushed;

[0108] Fig. 76 is an enlarged view of point Ag in Fig. 75;

[0109] Fig. 77 is a front view of the disconnecting switch operating mechanism of the embodiment with part of the base hidden and the connecting member pushed;

[0110] Fig. 78 is an enlarged view of point B in Fig. 77;

[0111] Fig. 79 is an assembled perspective view of the connecting member of the embodiment;

[0112] Fig. 80 is a front view of the handle assembly of the embodiment of the present disclosure;

[0113] Fig. 81 is a side view of the handle assembly of the embodiment;

[0114] Figure 82 is a partial exploded view of the handle assembly of this embodiment;

[0115] Figure 83 is an assembled perspective view of the latch, stop, return, and base of this embodiment;

[0116] Figure 84 is an assembled cross-sectional view of the latch, stop, return, and base of this embodiment;

[0117] Figure 85 is an assembled perspective view of the stop and return of this embodiment;

[0118] Figure 86 is an assembled perspective view of the stop of this embodiment;

[0119] Figure 87 is an assembled cross-sectional view of the operating handle, limit shaft, and pusher of this embodiment;

[0120] Figure 88 is an assembled perspective view of the base, first seal, and second seal of this embodiment;

[0121] Figure 89 is an assembled cross-sectional view of the operating handle, limit shaft, base, first seal, second seal, and pusher of this embodiment.

[0122] Wherein: 1a. moving contact; 2a. static contact; 20a. terminal; 3a. arc extinguishing assembly; 31a. arc separation part; 32a. second transmission tooth structure; 33a. second isolation structure; 4a. action execution assembly; 40a. rotary disc; 41a. first transmission tooth structure; 42a. first meshing tooth; 42a-1. first part of first meshing tooth; 42a-2. second part of first meshing tooth; 42a-3. third part of first meshing tooth; 43a. arc blocking part; 5a. arc separation piece; 50a. arc separation cover; 51a. arc separation rotating shaft; 52a. second meshing tooth; 53a. arc pressing part; 54a. blade part; 55a. transmission plate; 56a. first connecting part; 57a. second connecting part; 58a. reinforcing part; 6a. base; 61a. limiting part; 62a. first isolation structure; 620a. guide plate. 1b contact component, 11b static contact, 12b moving contact, 13b action execution assembly, 2b arc separation piece, 21b arc separation part, 210b arc cutting end, 22b first connecting part, 221b second sliding structure, 23b second connecting part, 3b arc extinguishing grid assembly, 31b first grid group, 32b second grid group, 33b third grid group, 331b protruding part, 34b arc blocking part, 4b base assembly, 41b base, 411b first sliding structure. 1c. base; 10c. main shaft; 20c. second gear; 30c. energy storage element; 40c. pin shaft; 50c. connecting rod; 60c. linkage member; 61c. first cylindrical structure; 611c. butt joint cylinder; 70c. main shaft; 71c. first shaft segment; 711c. first transmission structure; 712c. transmission shaft part; 72c. second shaft segment; 721c. second transmission structure; 722c. transmission shaft hole; 80c. first gear; 81c. first bevel gear structure; 21c. second bevel gear structure; 22c. second cylindrical structure; 221c. butt joint hole; 41c. sliding sleeve; 51c. sliding slot; K. transmission gap included angle. 10d. base; 20d. padlock piece; 30d. main shaft; 40d. energy storage linkage member; 41d. linkage shaft; 42d. gear shaft; 43d. energy storage element; 44d. connecting rod; 45d. support shaft; 21d. convex part; 31d. lock slot; 11d. sliding slot; 32d. diameter increasing part; 33d. avoiding part; 311d. stop block; 12d. first limiting structure; 22d. second limiting structure; 23d. padlock part; 24d. slot; 25d. long slot.1e moving contact assembly, 10e moving contact, 11e moving contact head, 111e abutting bump, 112e first notch, 113e guide surface, 12e arc striking member, 121e arc striking plate, 1211e second notch, 122e arc striking connecting part, 123e limiting bump, 13e give way structure, 14e spring leaf, 141e limiting groove, 15e U-shaped connecting piece, 2e static contact assembly, 20e static contact, 21e static contact head, 3e contact support, 31e rotating shaft part, 311e mounting hole, 312e recess structure, 32e second transmission gear structure, 4e arc separation member, 40e arc separation structure, 5e fixed seat. 1f. isolator operating mechanism; 2f. contact mechanism; 90f. transmission member; 100f. contact rotating shaft member; 60f. linkage member; 20f. first gear; 80f. second gear; 30f. energy storage element; 40f. pin shaft; 50f. connecting rod; 70f. main shaft; 61f. first cylindrical structure; 611f. butt joint cylinder; 22f. second cylindrical structure; 221f. butt joint cylindrical hole; 91f. first transmission structure; 92f. second transmission structure; 101f. fourth transmission structure; 711f. fifth transmission structure; 721f. sixth transmission structure; 712f. transmission shaft part; 722f. transmission shaft hole. 1g. operating mechanism; 2g. operating handle; 10g. base; 70g. main shaft; 80g. first gear; 20g. second gear; 30g. energy storage element; 40g. pin shaft; 50g. connecting rod; 60g. linkage member; 90g. detection module; 71g. pushing bump; 110g. connecting piece; 91g. push rod; 961g. moving contact; 942g. first static contact; 952g. second static contact; 98g. shell; 92g. swing rod; 921g. pivot shaft; 97g. spring; 96g. moving contact piece; 93g. common contact piece; 94g. first static contact piece; 95g. second static contact piece; 931g. common terminal; 941g. normally open terminal; 951g. normally closed terminal; 11g. side cover; 13g. base clamping hook; 14g. base positioning bump; 981g. shell clamping bump; 982g. shell positioning surface; 111g. inclined surface; 12g. limiting bump; 112g. limiting groove. 1h. handle assembly; 10h. operating handle; 20h. padlock; 30h. stopper; 40h. reset piece; 50h. base; 21h. pivot shaft; 22h. pushing bump; 51h. stopper hole; 32h. cylindrical main body; 31h. reset part; 33h. pushing end surface; 34h. guide inclined surface; 11h. padlock mounting slot; 12h. first matching bump; 13h. second matching bump; 53h. first matching slot; 54h. second matching slot; 61h. first sealing piece; 62h. second sealing piece; 14h. pin mounting slot; 60h. limiting shaft; 70h. pushing piece; 52h. positioning slot; 101h. first mark; 102h. second mark. DETAILED DESCRIPTION

[0123] To further illustrate the embodiments, the disclosure provides the accompanying drawings. These drawings are part of the disclosure and are mainly used to illustrate the embodiments, and can be used to explain the operating principles of the embodiments in conjunction with the related descriptions in the specification. Those of ordinary skill in the art should understand other possible implementations and advantages of the disclosure in conjunction with these. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0124] Switching unit embodiment 1 of switch appliance

[0125] Referring to FIGS. 1-5, the disclosure provides a switching unit of a switch appliance, which includes a moving contact 1a, a stationary contact 2a, and an arc extinguishing assembly 3a. The moving contact 1a is arranged on an action execution assembly 4a, and the moving contact 1a, the stationary contact 2a, the arc extinguishing assembly 3a, and the action execution assembly 4a are all arranged on a base 6a, which cooperates with an upper cover arranged thereon to form a cavity for accommodating the moving contact 1a, the stationary contact 2a, the arc extinguishing assembly 3a, and the action execution assembly 4a. The stationary contact 2a has a terminal end extending out of the cavity to form a terminal 20a. The moving contact 1a is driven by the action execution assembly 4a to close or break with the stationary contact 2a, and the arc extinguishing assembly 3a is linked to the action execution assembly 4a. The arc extinguishing assembly 3a is provided with an arc separation portion 31a, which is selectively located in a avoiding position or an arc extinguishing position as the moving contact 1a closes or breaks with the stationary contact 2a, so that the arc separation portion 31a forms physical isolation between the moving contact 1a and the stationary contact 2a in the arc extinguishing position to extinguish the arc.

[0126] Referring to FIG. 3, when the moving contact 1a and the stationary contact 2a are closed, the arc separation portion 31a is located on one side of the closing point, so as to form reliable closure of the moving contact 1a and the stationary contact 2a, and at this time the arc separation portion 31a is located in the avoiding position.

[0127] Referring to FIG. 5, when the moving contact 1a and the stationary contact 2a are broken, the arc separation portion 31a is located between the moving contact 1a and the stationary contact 2a and forms a physical isolation barrier therebetween, so as to isolate the arc generated when the moving contact 1a and the stationary contact 2a are broken to form effective arc extinguishing, and at this time the arc separation portion 31a is located in the arc extinguishing position.

[0128] The arc extinguishing assembly 3a and the action executing assembly 4a are linked through the toothed transmission mechanism, so that the arc extinguishing assembly 3a can move with the movement of the action executing assembly 4a, and the movement of the arc shielding part 31a and the movable contact part 1a is closely connected, the synchronization of the movement of the two is improved, and the switching timing of the arc shielding part 31a between the avoiding position and the arc extinguishing position is more accurate. In addition, the transmission precision and efficiency of the toothed transmission mechanism are high, and the arc shielding part 31a is driven by the toothed transmission mechanism no matter from the avoiding position to the arc extinguishing position or from the arc extinguishing position to the avoiding position, the transmission is more reliable, and the working reliability of the arc extinguishing assembly is improved, and the switch unit has good arc extinguishing effect.

[0129] Referring to FIGS. 1-7, the movable contact part 1a of the embodiment is closed or disconnected with the static contact part 2a by rotation, so the action executing assembly 4a is linked with the arc extinguishing assembly 3a through the toothed transmission mechanism formed by gears. Among them, the gear not only refers to a complete external gear or internal gear, but also can be an incomplete gear (external gear or internal gear) with only a part of transmission teeth formed by a plurality of first meshing teeth arranged along a circular arc, and the gear is not limited to any one of a straight gear, an inclined gear, a bevel gear and a turbine. In other embodiments, the movable contact part 1a can also be closed or disconnected with the static contact part 2a by linear motion, so the action executing assembly 4a can be provided with a rack to link with the arc extinguishing assembly 3a.

[0130] The action executing assembly 4a is a rotating assembly, which includes a rotating disc part 40a rotatably arranged on the base 6a, and the movable contact part 1a is inserted on the rotating disc part 40a, so that the movable contact part 1a rotates under the driving of the rotating disc part 40a to close or disconnect the movable contact part 1a with the static contact part 2a.

[0131] Referring to FIG. 3, the rotating disc part 40a is provided with a first transmission tooth structure 41a, and the arc extinguishing assembly 3a is provided with a second transmission tooth structure 32a, the first transmission tooth structure 41a and the second transmission tooth structure 32a cooperate to form a toothed transmission mechanism, and the arc shielding part 31a is switched between the avoiding position and the arc extinguishing position under the driving of the second transmission tooth structure 32a. More specifically, the rotating disc part 40a is provided with a plurality of first meshing teeth 42a on the outside, and part of the first meshing teeth form the first transmission tooth structure 41a, so the first transmission tooth structure 41a is a part of the external gear structure arranged on the outside of the rotating disc part 40a. Correspondingly, the second transmission tooth structure 32a can be selected from any one of a straight rack structure, an arc-shaped internal rack structure and a gear structure including at least a part of an external tooth, and the second transmission tooth structure 32a forms transmission cooperation with the first transmission tooth structure 41a of the part of the external gear structure.

[0132] Referring to Fig. 2, the moving contact 1a is arranged on both sides of the rotating disc 40a in the radial direction of the rotating disc 40a, and the moving contact 1a extends in the radial direction of the rotating disc 40a. The moving contact 1a is arranged in the axial direction of the rotating disc 40a away from the first transmission tooth structure 41a.

[0133] Referring to Fig. 6, the arc extinguishing assembly 3a further comprises an arc separation member 5a, which comprises an arc separation rotating shaft 51a and a plurality of second meshing teeth 52a arranged outside the arc separation rotating shaft 51a. The arc separation member 5a is arranged on the base 6a by rotating the arc separation rotating shaft 51a. The second meshing teeth 52a form the second transmission tooth structure 32a, so that the second transmission tooth structure 32a of the embodiment is formed as a partial external gear structure with a part of external teeth.

[0134] Referring to Figs. 5 and 6, at least one second meshing tooth 52a extends in the axial direction of the rotating disc 40a to separate the moving contact 1a from the stationary contact 2a to achieve arc extinguishing. Therefore, the second meshing tooth 52a for separating the moving contact 1a from the stationary contact 2a forms the arc separation portion 31a. With the rotation of the rotating disc 40a, the arc separation member 5a rotates under the action of the second meshing tooth 52a. The arc separation portion 31a gradually enters between the moving contact 1a and the stationary contact 2a to form physical separation therebetween to extinguish the arc therebetween.

[0135] The number of second meshing teeth 52a forming the arc separation portion 31a in the embodiment is two. If the first second meshing tooth 52a has residual arc, the second second meshing tooth 52a can supplement the arc interruption, further improving the reliability of arc extinguishing. In other embodiments, the number of second meshing teeth 52a forming the arc separation portion 1a can be only one or more than two, which can also achieve certain arc extinguishing effect. Correspondingly, there should be the same number of first meshing teeth 42a as the second meshing teeth 52a to cooperate with them.

[0136] Referring to FIG. 5 and FIG. 6, the arc-shielding part 31a in the embodiment is formed by the second engaging tooth 52a, and the second engaging tooth 52a forming the arc-shielding part 31a also forms a tooth-shaped transmission with the first engaging tooth 42a to link the arc-extinguishing assembly 3a and the action-performing assembly 4a, so that the second engaging tooth 52a forming the arc-shielding part 31a integrates the arc-shielding function and the transmission function, makes full use of the structure of the arc-shielding piece 5a, and is conducive to the compact structure of the switch unit. In addition, due to the engagement of the second engaging tooth 52a and the first engaging tooth 42a, the engaged second engaging tooth 52a and the first engaging tooth 42a jointly form a physical isolation barrier for arc-shielding, thereby increasing the thickness of the physical isolation barrier and the arc-shielding performance; in other embodiments, it is also feasible to rely only on the arc-shielding part 31a to form the physical isolation barrier, but it should be ensured that the thickness of the arc-shielding part 31a is sufficient for arc-extinguishing, at this time the arc-shielding part 31a does not participate in the tooth-shaped transmission for linking the arc-extinguishing assembly 3a and the action-performing assembly 4a, and the arc-shielding part 31a is not limited to the structure of the second engaging tooth 52a.

[0137] Referring to FIG. 5 and FIG. 6, the arc-shielding piece 5a is also provided with a plurality of arc-pressing parts 53a, the arc-pressing parts 53a are arranged circumferentially adjacent to the arc-shielding part 31a along the arc-shielding rotation shaft 51a, the plurality of arc-pressing parts 53a are arranged spaced apart along the axial direction of the arc-shielding rotation shaft 51a, and a groove 530a for accommodating the movable contact part 1a is formed between adjacent arc-pressing parts 53a. In the process that the movable contact part 1a moves from the position closed to the static contact part 2a to the position away from the static contact part 2a, the arc-shielding piece 5a rotates under the action of the tooth-shaped transmission mechanism, so that the movable contact part 1a and the arc-pressing part 53a have relative movement, and adjacent arc-pressing parts 53a can form the groove 530a for accommodating the movable contact part 1a, and the groove 530a can form a movement accommodation structure of the movable contact part 1a. In addition, in the movement process, the arc-pressing parts 53a located on both sides of the movable contact part 1a have a compression effect on the arc generated between the movable contact part 1a and the static contact part 2a, which is helpful for the subsequent arc-shielding part 31a to intervene in arc-extinguishing, and further improves the effect and reliability of arc-extinguishing.

[0138] The movable contact part 1a in the embodiment is a structure of two spaced apart plates, so that the arc-pressing part 53a is provided with three arc-pressing parts 53a, and the three arc-pressing parts 53a are arranged spaced apart along the axial direction of the rotating disc part 40a on both sides of the movable contact part 1a.

[0139] Referring to FIG. 7, the first engaging teeth 42a forming the first transmission tooth structure 41a do not have a fixed length in the axial direction of the rotating disc 40a. In the embodiment, the first portion of the first engaging teeth 42a-1 is arranged in a non-overlapping manner with the moving contact 1a in the axial direction of the rotating disc 40a. Such an arrangement can make full use of the limited space in the axial direction of the rotating disc 40a, and make the overall layout of the action execution assembly 4a more compact. In order to separate the moving contact 1a and the stationary contact 2a sufficiently for cooperating with the arc separation portion 31a or to increase the transmission strength, the second portion of the first engaging teeth 42a-2 has a certain overlap with the moving contact 1a in the axial direction of the rotating disc 40a. More specifically, the second portion of the first engaging teeth 42a-2 is fully extended in the axial direction of the outer periphery of the rotating disc 40a. The third portion of the first engaging teeth 42a-3 is disconnected in the middle in the axial direction of the rotating disc 40a to form the movement allowance of the arc pressing portion 53a.

[0140] Referring to FIG. 2 and FIG. 6, the edge of at least one arc pressing portion 53a is provided with the second engaging teeth 52a, and the second engaging teeth 52a are arranged correspondingly with the first engaging teeth 42a to facilitate smooth transmission of the rotating disc 40a and the arc separation member 5a. Therefore, in the embodiment, the second engaging teeth 52a are arranged at the edge of the entire outer periphery of one of the arc pressing portions 53a, and the second engaging teeth 52a are arranged only at the edge of part of the outer periphery of the other two arc pressing portions 53a.

[0141] The arc separation member 5a is also provided with a blade portion 54a, which is located on the side of the arc separation rotating shaft 51a away from the moving contact 1a. The blade portion 54a can be one or multiple. Multiple blade portions 54a are arranged in the circumferential direction of the arc separation rotating shaft 51a. During the rotation of the arc separation member 5a, the blade portion 54a can effectively increase the flow speed of the air flow, which is conducive to reducing the arc temperature, dispersing the free arc, accelerating the extinction of the free arc, and thus improving the service life of the product.

[0142] Referring to FIG. 4 and FIG. 5, the action execution assembly 4a of the embodiment is provided with two moving contacts 1a, and the two moving contacts 1a are arranged on the two sides of the radial direction of the rotating disc 40a, so that the two moving contacts 1a move synchronously under the driving of the rotating disc 40a. The stationary contact 2a is two, and the two stationary contacts 2a are arranged correspondingly with the moving contacts 1a, thereby forming two groups of contact groups. Each group of contact groups is correspondingly provided with a group of arc extinguishing assemblies 3a. In other embodiments, it is also feasible to arrange only one group of contact groups or more than two groups of contact groups, and the specific number and arrangement manner can be determined by those skilled in the art according to the content disclosed in the disclosure and the product demand.

[0143] The action process of the disclosure is as follows:

[0144] Referring to Fig. 3, when the moving contact 1a and the stationary contact 2a are closed, the arc isolation part 31a is in the avoiding position, and the two plate-shaped structures of the moving contact 1a are respectively located on the two sides of the stationary contact 2a and in contact with the stationary contact 2a, so that the moving contact 1a and the stationary contact 2a form reliable closure.

[0145] Referring to Figs. 3 to 5, when the moving contact 1a and the stationary contact 2a need to be broken, the moving contact 1a rotates around the rotating shaft of the rotating disc part 40a in the counterclockwise direction shown by the arrow in Figs. 3 and 4, and the arc isolation part 5a synchronously rotates around the arc isolation rotating shaft 51a in the clockwise direction. In the rotating process, the moving contact 1a passes through the groove 530a between the adjacent arc pressing parts 53a, and the arc pressing parts 53a compress the arc between the moving contact 1a and the stationary contact 2a. With the continuous rotation of the arc isolation part 5a, the second engaging teeth 52a forming the arc isolation part 31a engage with the first engaging teeth 42a to form a physical isolation barrier between the moving contact 1a and the stationary contact 2a, so as to realize arc extinguishing of the switch unit. Until the moving contact 1a stops contacting the limiting part 61a on the base 6a, and in the whole rotating process of the arc isolation part 5a, the blade part 54a accelerates the flow rate of the airflow, which is beneficial to eliminating the free arc and improving the arc extinguishing effect.

[0146] Switching unit embodiment 2 of the switching device

[0147] The difference between this embodiment and embodiment 1 is that the structure of the arc isolation part 5a is different, and the first transmission tooth structure 41a outside the rotating disc part 40a is also different. Specifically as follows:

[0148] Referring to Figs. 8 to 13, the arc isolation part 5a is provided with an arc isolation cover 50a, which is a cover-shaped structure surrounding the stationary contact 2a, and a part of the arc isolation cover 50a forms the arc isolation part 31a. The moving contact 1a and the first transmission tooth structure 41a are arranged in the axial direction of the rotating disc part 40a. The arc isolation part 5a further comprises an arc isolation rotating shaft 51a and a transmission plate 55a arranged outside the arc isolation rotating shaft 51a. The edge of the outer periphery of the transmission plate 55a is provided with a plurality of second engaging teeth 52a, which form a second transmission tooth structure 32a. The second transmission tooth structure 32a is formed as a gear structure, more specifically, an incomplete gear structure with a part of external teeth. With the rotation of the arc isolation part 5a, the arc isolation part 31a rotates around the arc isolation rotating shaft 51a, so as to move between the avoiding position and the arc extinguishing position. The cover-shaped structure of the arc isolation cover 50a is more sufficient for isolation of the stationary contact 2a, which improves the arc isolation effect between the moving contact 1a and the stationary contact 2a, and further improves the reliability of arc extinguishing.

[0149] The arc separation member 5a further comprises a first connecting portion 56a and a second connecting portion 57a connected to the arc separation shaft 51a, the first connecting portion 56a is a sheet structure extending along the axial and radial directions of the arc separation shaft 51a, the second connecting portion 57a is a sheet structure extending along the radial and circumferential directions of the arc separation shaft 51a, and the second connecting portion 57a is located at the end of the arc separation shaft 51a close to the base 6a. In the radial direction of the arc separation shaft 51a, the arc separation portion 31a is connected to the outer edges of the first connecting portion 56a and the second connecting portion 57a respectively, so that the arc separation cover 50a forms a cover structure with the opening facing away from the base 6a. The first connecting portion 56a mainly serves to connect the arc separation shaft 51a and the arc separation portion 31a, and the second connecting portion 57a, in addition to serving the same function as the first connecting portion 56a, can also increase the strength of the arc separation cover 50a, that is, the arc separation shaft 51a and the arc separation portion 31a can be connected even without the second connecting portion 57a. Secondly, since the second connecting portion 57a is located at the end of the arc separation shaft 51a close to the base 6a, it can form a barrier between the base 6a and the arc separation portion 31a to prevent the free arc from moving in the gap between the base 6a and the arc separation portion 31a and thus reduce the arc extinguishing effect.

[0150] Referring to FIG. 9, the surface of the first connecting portion 56a facing the static contact portion 2a is provided with a reinforcing portion 58a, which is a plurality of reinforcing ribs arranged at intervals. The reinforcing portion 58a serves to support the first connecting portion 56a, thereby increasing the strength of the arc separation member 5a, preventing the arc separation member 5a from deforming, and ensuring that the static contact portion 2a is reliably surrounded, thereby further ensuring the arc separation effect.

[0151] Referring to FIG. 10, the end of the rotating disc member 40a close to the base 6a is provided with an arc blocking portion 43a extending in the radial direction thereof. The arc blocking portion 43a is located between the base 6a and the arc separation cover 50a, and the position of the arc blocking portion 43a in the circumferential direction of the rotating disc member 40a is such that the arc separation portion 31a is located between the moving contact portion 1a and the static contact portion 2a when the arc is extinguished. Since the side of the arc separation cover 50a facing the base 6a is provided with the second engaging tooth 52a, there is a gap between the second connecting portion 57a of the arc separation cover 50a and the base 6a. When the moving contact portion 1a and the static contact portion 2a are disconnected, the free arc may pass through the gap and the opening of the arc separation cover 50a to contact the static contact portion 2a. The presence of the arc blocking portion 43a can to some extent fill the gap, thereby reducing the movement space of the free arc in the direction of the static contact portion 2a and further improving the reliability of arc extinguishing.

[0152] Preferably, the length of the arc blocking portion 43a extending in the circumferential direction of the rotary disc member 40a is in contact or substantially in contact with the guide plate 620a on the base, wherein the substantially in contact includes that the two are partially overlapped or there is a small gap between the two, so that the guide plate 620a and the arc separation portion 31a separate the gap between the second connecting portion 57a and the base 6a, further reducing the possibility of the free arc passing through the gap and the opening of the arc cover 50a to contact the static contact 2a, and improving the reliability of arc extinguishing.

[0153] Referring to FIG. 9, the surface of the base 6a where the arc extinguishing assembly 3a is arranged is provided with a first isolation structure 62a, and the arc extinguishing assembly 3a is provided with a second isolation structure 33a. When the arc extinguishing assembly 33a is in the arc extinguishing position, the first isolation structure 62a cooperates with the second isolation structure 33a to form an isolation structure, and the first isolation structure 62a and the second isolation structure 33a are partially overlapped in the direction of the base 6a facing the arc extinguishing assembly 3a, so that the isolation structure can fill the gap between the arc extinguishing assembly 3a and the base 6a, reduce the possibility of free electrons moving in the gap, and further improve the reliability of arc separation.

[0154] The first isolation structure 62a of the embodiment is formed by the guide plate 620a on the base 6a, and the guide plate 620a extends along the movement path of the arc extinguishing assembly 3a. The second isolation structure 33a is arranged on the edge of the arc extinguishing assembly 3a facing the base 6a. In this embodiment, the outer side surface of the arc-shaped arc separation portion 31a of the arc separation member 5a forms the second isolation structure 33a, and more specifically, the bottom of the outer side surface of the arc separation portion 31a forms the second isolation structure 33a. Therefore, the first isolation structure 62a can also form a movement guide structure of the arc separation member 5a.

[0155] The guide plate 620a does not extend completely in the movement path of the arc extinguishing assembly 3a to prevent the guide plate from interfering with the movement of the action execution assembly 4a. The incomplete extension of the guide plate 620a causes a certain gap between the second connecting portion 57a of the arc cover 50a and the base 6a in the extension direction of the guide plate 620a. The arc blocking portion 43a described above can fill the gap to some extent, so as to cooperate with the guide plate 620a to reduce the activity space of the free arc in the direction of the static contact 2a, and further improve the reliability of arc extinguishing.

[0156] In this embodiment, the guide plate 620a and the arc blocking portion 43a cooperate to reduce the possibility of the free arc moving between the second connecting portion 57a and the base 6a, but one of the guide plate 620a and the arc blocking portion 43a alone can also block the free arc. Therefore, in other embodiments, only the guide plate 620a or the arc blocking portion 43a can be used to block the free arc.

[0157] The movement speed of the arc extinguishing assembly 3a is twice that of the action executing assembly 4a, so that the moving contact 1a does not reach the breaking position during the movement from the closed state to the breaking state, and thus the arc isolation portion 31a cooperates with the guide plate 620a to form a physical isolation barrier during the movement of the moving contact 1a away from the stationary contact 2a. In this embodiment, the arc isolation portion 31a starts to cooperate with the guide plate to form a physical isolation barrier when the rotating disc 40a rotates 30° with the moving contact 1a. The action executing assembly 4a and the arc extinguishing assembly 3a are connected through a gear transmission mechanism with a transmission ratio of 2:1, so that the arc isolation portion 31a can enter between the moving contact 1a and the stationary contact 2a to start the arc isolation function when the moving contact 1a rotates a small angle, thereby reducing the duration of the electric arc. The guide plate 620a forming the first isolation structure 62a extends along the movement path of the arc isolation member 5a, and the length of the extension should be such that when the moving contact rotates 30°, the arc isolation member 5a moves to the position of the guide plate, at which time the arc isolation portion 31a cooperates with the guide plate 620a to form an isolation barrier between the moving contact 1a and the stationary contact 2a, so as to extinguish the electric arc. Thus, the electric arc can be cut off when the moving contact 1a moves a small angle, and under the same rated current, the arc burning time is shorter, the arc burning energy is lower, and the arc extinguishing effect is better.

[0158] The action process of the present disclosure is as follows:

[0159] Referring to FIG. 11, when the moving contact 1a and the stationary contact 2a are closed, the arc isolation portion 31a is in a avoiding position, and the two plate-shaped structures forming the moving contact 1a are located on both sides of the stationary contact 2a and in contact with the stationary contact 2a, at which time the moving contact 1a and the stationary contact 2a form a reliable closure.

[0160] Referring to FIGS. 11 to 13, when the moving contact 1a and the stationary contact 2a need to be broken, the moving contact 1a rotates around the rotating shaft of the rotating disc 40a in the counterclockwise direction shown by the arrows in FIGS. 11 and 12, and the arc isolation member 5a rotates around the arc isolation rotating shaft 51a in the clockwise direction, and the arc isolation portion 31a gradually moves towards between the moving contact 1a and the stationary contact 2a, and when the moving contact 1a rotates 30°, the arc isolation portion 31a cooperates with the guide plate, at which time a physical isolation barrier has been formed between the moving contact 1a and the stationary contact 2a to extinguish the arc; with the continuous rotation of the arc isolation member 5a, it continuously rotates along the extension direction of the guide plate until the arc isolation portion 31a contacts the side wall of the base 6a and stops. The arc isolation cover 50a of the arc isolation member 5a surrounds the stationary contact 2a to form an isolation barrier between the stationary contact 2a and the moving contact 1a, and the moving contact 1a and the stationary contact 2a are broken.

[0161] Based on the foregoing embodiment 2, the switch unit of the present disclosure further comprises an arc extinguishing grid assembly 3b. The following will be described in detail in combination with the moving contact, the stationary contact and the arc extinguishing assembly.

[0162] Referring to Figs. 24-26, the arc separation member 2b is pivotally arranged on the base assembly 4b and is linked to the action execution assembly 13b through a gear transmission structure, and switches between the avoiding position and the arc separation position along with the action of the action execution assembly 13b. The arc separation member 2b of the present embodiment is a cover-shaped structure, which includes an arc separation portion 21b, and when the movable contact portion 12b is in the conducting position, the arc separation member 2b is switched to the avoiding position along with the action of the action execution assembly 13b; when the movable contact portion 12b is in the breaking position, the arc separation member 2b is switched to the arc separation position along with the action of the action execution assembly 13b, so that the arc separation portion 21b forms a first physical isolation barrier between the breaking movable contact portion 12b and the static contact portion 11b, thereby separating the arc between the movable contact portion 12b and the static contact portion 11b.

[0163] The arc separation member 2b and the arc extinguishing grid assembly 3b are respectively provided with two groups, forming two groups of arc extinguishing structures, and each group of arc extinguishing structures corresponds to a group of contact assemblies.

[0164] Referring to Figs. 24-28, the arc extinguishing grid assembly 3b includes a plurality of arc extinguishing pieces arranged at intervals, and at least a part of the arc extinguishing pieces are arranged on at least one side of the movement track of the arc separation portion 21b and cover a part of the area on the at least one side, so that the arc separation portion 21b presses a part of the arc to the arc extinguishing grid assembly 3b along with the action of the arc separation member 2b. The movement track of the arc separation portion 21b refers to the area passed by the arc separation portion 21b during the switching movement between the avoiding position and the arc separation position, and the arc separation portion 21b of the present embodiment is a plate-shaped structure, so its movement track is a linear structure.

[0165] In the present embodiment, the arc extinguishing grid assembly 3b is arranged on both sides of the movement track of the arc separation portion 21b, and the arc extinguishing pieces of the arc extinguishing grid assembly 3b are divided into two parts, the first part of the arc extinguishing pieces forms a first grid group 31b, and the second part of the arc extinguishing pieces forms a second grid group 32b, and the first grid group 31b and the second grid group 32b are respectively arranged on opposite sides of the movement track. The arc extinguishing pieces of the first grid group 31b are arranged at intervals along the movement track of the arc separation portion 21b and form a small gap with the arc separation portion 21b, so that the arc separation portion 21b presses a part of the arc to the first grid group 31b. The arc extinguishing pieces of the second grid group 32b are arranged at intervals along the movement track of the arc separation portion 21b, and the second grid group 32b also forms a small gap with the arc separation portion 21b, so that the arc separation portion 21b also presses the arc to the second grid group 32b along with the action of the arc separation member 2b.

[0166] The arc-extinguishing blades of the first and second grid piece groups 31b and 32b protrude in the direction of the arc separation part 21b by a certain distance, and the distance between the edge of the protruding part of the arc-extinguishing blade and the arc separation part 21b is the minimum distance between the arc-extinguishing blade and the arc separation part 21b, which is the distance between the first or second grid piece group 31b or 32b and the arc separation part 21b.

[0167] In the present disclosure, the small gap fit refers to the small minimum distance between the arc-extinguishing blade and the arc separation part 21b, so that the electric arc can be squeezed into the gap between adjacent arc-extinguishing blades during the movement of the arc separation part 21b, and the arc-extinguishing blade does not affect the movement of the arc separation part 21b. The specific gap value (the minimum distance between the arc-extinguishing blade and the arc separation part 21b) between the arc separation part 21b and the arc-extinguishing blade is determined by the person skilled in the art according to actual needs.

[0168] The arc separation part 21b of the present embodiment is a cover-shaped structure rotatably arranged on the base assembly 4b, and the arc separation part 21b is a circular arc-shaped plate structure. The movement trajectory of the arc separation part 21b is a circular arc, and the first and second grid piece groups 31b and 32b are arranged on the inner and outer sides of the circular arc-shaped trajectory, respectively. More specifically, the first grid piece group 31b is arranged on the outer side of the circular arc-shaped trajectory, and the second grid piece group 32b is arranged on the inner side of the circular arc-shaped trajectory.

[0169] The base assembly 4b includes a base 41b and an upper cover. The upper cover is arranged opposite to the base 41b, and a cavity for mounting the contact part 1b and the arc-extinguishing structure is formed between the base 41b and the upper cover. The arc-extinguishing blades of the first and second grid piece groups 31b and 32b are respectively inserted into the upper cover of the base assembly 4b. However, the installation of the arc-extinguishing blades is not limited thereto. The arc-extinguishing blades of the first grid piece group 31b can also be inserted into the base 41b of the base assembly 4b.

[0170] The arc-extinguishing grid piece assembly 3b further includes an insulating arc blocking part 34b. The arc blocking part 34b is arranged in a partially surrounding manner on the first grid piece group 31b in a direction away from the arc separation part 21b. The arc blocking part 34b and the base assembly 4b cooperate to form an arc-extinguishing chamber structure, so that the arc blocking part 34b can block the movement of the free electric arc outward, prevent the influence on the electrical performance of the switch electric appliance, and ensure the reliability of arc extinguishing. The arc blocking part 34b of the present embodiment is a plate-shaped structure arranged outside the first grid piece group 31b. More specifically, the arc blocking part 34b is integrally formed on the base 41b of the base assembly 4b made of plastic material. Therefore, the arc blocking part 34b is made of insulating material, which can effectively block the free electric arc and also prolong the creepage distance between the moving contact 12b and the stationary contact 11b, prevent the electric arc from reigniting, and further improve the arc-extinguishing performance of the switch electric appliance. In other embodiments, the arc blocking part 34b can also be a separate part fixedly connected to the base assembly 4b, and the arc blocking part 34b is made of insulating material.

[0171] Referring to FIG. 26 and FIG. 28, the arc separation piece 2b is movably arranged on the base 41b of the base assembly 4b, and the arc separation piece 2b further comprises a first connecting portion 22b, the arc separation portion 21b is connected with the first connecting portion 22b and extends away from the first connecting portion 22b to a side away from the base 41b, the base 41b is provided with a first sliding structure 411b, and a side of the first connecting portion 22b facing the base 41b is provided with a second sliding structure 221b, the first sliding structure 411b and the second sliding structure 221b are in concave-convex matching. Specifically, the first sliding structure 411b is a sliding plate protruding from the surface of the base 41b, and the second sliding structure 221b is a sliding groove corresponding to the shape of the sliding plate. In other embodiments, the structures of the first sliding structure 411b and the second sliding structure 221b can be opposite, that is, the first sliding structure 411b is a sliding groove, and the second sliding structure 221b is a sliding plate.

[0172] The concave-convex matching of the first sliding structure 411b and the second sliding structure 221b can compensate for the gap between the arc separation piece 2b and the base 41b, and prevent the free arc remaining after cutting by the arc extinguishing grid piece assembly 3b from passing through the gap between the arc separation piece 2b and the base 41b to cause arc reignition.

[0173] Referring to FIG. 24 to FIG. 28, since the arc separation piece 2b is a cover-shaped structure, the end of the arc separation portion 21b is also used to cut the arc during switching to the arc separation position, and the end of the arc separation portion 21b used to cut the arc is defined as the arc cutting end 210b. In order to enable the arc to be smoothly squeezed into the gap between adjacent arc extinguishing pieces during elongation, the arc extinguishing grid piece assembly 3b is arranged at the end where the arc cutting end 210b of the arc separation portion 21b is located, so that the arc extinguishing pieces of the arc extinguishing grid piece assembly 3b cover the area where the arc cutting end 210b on both sides of the arc separation portion 21b is located. More specifically, when the arc separation portion 21b switches to the arc separation position, the arc extinguishing grid piece assembly 3b is located on both sides of the arc separation portion 21b and is biased to the end where the arc cutting end 210b is located. The arc separation piece 2b further comprises a second connecting portion 23b, the second connecting portion 23b is connected to the arc separation portion 21b and the first connecting portion 22b, and the second connecting portion 23b is located on the side of the arc separation portion 21b away from the arc extinguishing grid piece assembly 3b, so that the arc separation piece 2b forms a cover-shaped structure that is semi-enclosed on the static contact portion 11b. If there is no second connecting portion 23b, the free arc may pass through the end of the arc separation portion 21b away from the arc extinguishing grid piece assembly 3b (i.e., the end where the second connecting portion 23b is located) to reignite. Therefore, the cooperation of the cover-shaped arc separation piece 2b and the arc extinguishing grid piece assembly 3b in this embodiment can better prevent arc reignition and improve the arc extinguishing performance of the arc extinguishing structure.

[0174] In another embodiment, referring to Figs. 29-31, the arc-extinguishing blade assembly 3b is composed of a first blade group 31b and a third blade group 33b, the arc-extinguishing blades of the arc-extinguishing blade assembly 3b include a first portion and a third portion, the arc-extinguishing blades of the third portion are arranged in the third blade group 33b along the movement trajectory of the movable contact 12b, so that a part of the arc is pressed to the third blade group 33b by the movement of the movable contact 12b along the breaking direction. The first blade group 31b and the third blade group 33b are adjacent, and as the movable contact 12b moves from the on position to the breaking position, the movable contact 12b and the arc separation part 21b synchronously press the arc to the arc-extinguishing blades, so as to achieve arc extinguishing. In the state of contact breaking, the cooperation of the arc separation part 2b and the arc-extinguishing blade assembly 3b increases the opening distance between the movable contact 12b and the static contact 11b, i.e. the creepage distance between the movable contact 12b and the static contact 11b is increased, which improves the arc extinguishing performance and reduces the probability of arc reignition.

[0175] Referring to Fig. 28, the third blade group 33b is provided with a protruding part 331b, which overlaps a part of the movable contact 12b in the extension direction thereof. The protruding part 331b of the present embodiment is a protruding structure formed by extending the arc-extinguishing blades to both sides of the movable contact 12b by a certain distance, and a gap for the movement of the movable contact 12b is formed between the two protruding structures. In other embodiments, the protruding part 331b can be formed by extending the arc-extinguishing blades to only one side of the movable contact 12b, which can be the side of the movable contact 12b facing the base 41b or the side of the movable contact 12b away from the base 41b. As the movable contact 12b moves, the arc between the movable contact 12b and the static contact 11b is elongated and is pressed between the adjacent arc-extinguishing blades of the third blade group 33b to achieve arc extinguishing. The presence of the protruding part 331b facilitates the entry of the arc between the adjacent arc-extinguishing blades of the third blade group 33b, further improving the arc extinguishing effect of the arc-extinguishing blade assembly 3b and the arc extinguishing performance of the arc extinguishing structure.

[0176] In another embodiment, the arc separation part 2b is a plate structure, which can be a flat plate structure or an arc-shaped plate structure, and the main body of the arc separation part 2b serves as the arc separation part 21b. At this time, the arc-extinguishing blades of the arc-extinguishing blade assembly 3b can be arranged only on the side of the arc separation part away from the movable contact, only on the side of the arc separation part facing the movable contact, or on both sides of the arc separation part (i.e. the side away from the movable contact and the side facing the movable contact). When the space permits, the arc-extinguishing blades can be arranged around the arc separation part.

[0177] The arc-extinguishing fin assembly 3b includes the first fin group 31b and the second fin group 32b, or the first fin group 31b and the third fin group 33b, so that the first fin group 31b and the second fin group 32b, or the first fin group 31b and the third fin group 33b, cooperate to improve the arc-extinguishing performance of the arc-extinguishing structure. In other embodiments, the first fin group 31b is not limited to the arc-extinguishing fins arranged outside the arc-shaped movement track of the arc-separating part 21b, and the first fin group 31b can also refer to the arc-extinguishing fins arranged inside the arc-shaped movement track of the arc-separating part 21b (i.e., the positions of the first fin group 31b and the second fin group 32b are interchanged). If the current is small enough, only the first fin group 31b can be arranged; in addition, the first fin group 31b, the second fin group 32b, and the third fin group 33b can also cooperate to realize the arc-extinguishing function of the arc-extinguishing fin assembly 3b, further improving the arc-extinguishing performance to cope with a larger current.

[0178] In the above embodiments, the arc-extinguishing fins of the arc-extinguishing fin assembly 3b are arranged in intervals along the movement track of the arc-separating part 21b or the moving contact part 12b, so as to facilitate the arc to be squeezed and quickly enter between adjacent arc-extinguishing fins during the elongation process. In other embodiments, the arc-extinguishing fins can also be arranged in intervals along a direction parallel or close to parallel to the above movement track, or along the direction of the relative position of the base 41b and the upper cover.

[0179] Switching unit embodiment 3 of the switch apparatus

[0180] Referring to FIGS. 14 to 18, the difference between the present embodiment and embodiment 1 is that the structure of the arc-separating part 5a is different, and the first transmission tooth structure 41a outside the rotating disc part 40a is also different.

[0181] In embodiment 1, as shown in FIG. 7, the first engagement teeth 42a arranged outside the rotating disc part 40a include a first part of the first engagement teeth 42a-1 which does not extend completely in the axial direction of the rotating disc part 40a so as to be located in the moving contact part 1a, and a second part of the first engagement teeth 42a-2 which is a full tooth structure extending completely in the axial direction of the rotating disc part 40a, thereby increasing the strength of the first engagement teeth 42a while ensuring transmission.

[0182] Referring to FIGS. 14-16, the arc separation piece 5a of the present embodiment is a plate structure, more specifically an arc-shaped plate structure. The side surface of the arc separation piece 5a facing the first transmission tooth structure 41a is provided with a plurality of second engagement teeth 52a, which form the second transmission tooth structure 32a. Thus, the second transmission tooth structure 32a of the present embodiment is a rack structure, more specifically an arc-shaped rack structure. In the axial direction of the rotating disc piece 40a, the second engagement teeth 52a extend along part of the arc separation piece 5a, and the arc separation piece 5a forms the arc separation portion 31a corresponding to the moving contact portion 1a. The second engagement teeth 52a of the present embodiment are arranged in part in the arc-shaped extension direction of the arc separation piece 5a, so as to form a gap for the moving contact portion 1a on the basis of reliable transmission.

[0183] In the axial direction of the rotating disc piece 40a, the second engagement teeth 52a of the present embodiment extend along part of the arc separation piece 5a. In other embodiments, if the space is sufficient, the second engagement teeth 52a can extend completely or between the arc separation portion 31a and the moving contact portion 1a, so as to increase the thickness of the arc separation portion 31a and further enhance the arc extinguishing capability.

[0184] Referring to FIGS. 14-16, the arc separation piece 5a of the present embodiment is a plate structure, more specifically an arc-shaped plate structure. The side surface of the arc separation piece 5a facing the first transmission tooth structure 41a is provided with a plurality of second engagement teeth 52a, which form the second transmission tooth structure 32a. Thus, the second transmission tooth structure 32a of the present embodiment is a rack structure, more specifically an arc-shaped rack structure. In the axial direction of the rotating disc piece 40a, the second engagement teeth 52a extend along part of the arc separation piece 5a, and the arc separation piece 5a forms the arc separation portion 31a corresponding to the moving contact portion 1a. The second engagement teeth 52a of the present embodiment are arranged in part in the arc-shaped extension direction of the arc separation piece 5a, so as to form a gap for the moving contact portion 1a on the basis of reliable transmission.

[0185] Regarding the isolation structure, different from the second embodiment, referring to FIGS. 15-16, the first isolation structure 62a is formed by two guide plates 620a arranged at intervals along the movement path of the arc extinguishing assembly 3a, so as to form a guide groove between the two guide plates for accommodating part of the arc separation piece 5a. The edge of the arc separation piece 5a facing the base 6a forms the second isolation structure 33a. The first isolation structure 62a and the second isolation structure 33a of the present embodiment form a plug-in type fit, which can not only guide the movement of the arc separation piece 5a, but also effectively reduce the gap through which the free arc can pass, reduce the probability of arc reignition, and further improve the arc extinguishing capability.

[0186] The operation process of the present disclosure is as follows:

[0187] Referring to FIG. 17, when the moving contact portion 1a and the stationary contact portion 2a are closed, the arc separation portion 31a is in the avoiding position, and the two plate structures forming the moving contact portion 1a are located on both sides of the stationary contact portion 2a and in contact with the stationary contact portion 2a. At this time, the moving contact portion 1a and the stationary contact portion 2a form a reliable closure.

[0188] Referring to Figs. 17-18, when the movable contact 1a and the fixed contact 2a need to be disconnected, the movable contact 1a rotates around the rotating shaft of the rotating disc 40a in the counterclockwise direction shown by the arrow in Fig. 17, and the arc separation piece 5a moves along the extension direction of the rack synchronously, the arc separation part 31a gradually moves towards the movable contact 1a and the fixed contact 2a, until the arc separation piece 5a contacts with the side wall of the base 6a, at this time, the movable contact 1a also reaches the maximum opening position, and the arc separation piece 5a is completely separated.

[0189] Switching unit embodiment 4 of the switch apparatus

[0190] Referring to Figs. 19-22, the embodiment is basically the same as embodiment 3, the only difference is that the arc separation piece 5a of the embodiment is a flat plate structure, and the second transmission tooth structure 32a is a straight rack structure. In addition, the extension direction of the first isolation structure 62a also corresponds to the extension direction of the arc separation piece 5a, which is a straight line extension.

[0191] The second meshing teeth 52a of the embodiment are completely arranged in the straight line extension direction of the arc separation piece 5a, so as to form a tooth-shaped transmission with the first meshing teeth, thereby realizing reliable transmission.

[0192] The other unstated parts of the embodiment are the same as embodiment 3, which will not be described here.

[0193] Switching unit embodiment

[0194] Referring to Fig. 23, the disclosure also discloses a switching apparatus, which comprises a switching unit of any one of the above embodiments 1-4. Further, the switching apparatus is a circuit breaker or a disconnector. The switching apparatus shown in Fig. 23 is a disconnector, and the end of the fixed contact 2a extends to the outside of the housing of the disconnector to form a terminal 20a.

[0195] Switching devices such as disconnectors and circuit breakers are generally provided with arc extinguishing structures to extinguish the electric arc generated during the breaking process of the moving contact and the stationary contact. Patent application No. CN202410718156.7 discloses a switching device, which uses an insulating arc separation member movably arranged to physically separate the moving contact and the stationary contact to achieve the arc extinguishing function. Specifically, when the moving contact and the stationary contact are closed, the arc separation member moves to one side of the closing point of the moving contact and the stationary contact (i.e. the arc separation member moves to the avoidance position) so as to facilitate the closing of the moving contact and the stationary contact; when the moving contact and the stationary contact are broken, the arc separation member moves to between the moving contact and the stationary contact (i.e. the arc separation member moves to the arc separation position) to form an arc separation barrier between the moving contact and the stationary contact, thereby lengthening the electric arc and isolating the free electric arc on both sides of the arc separation barrier to extinguish the arc. However, the arc separation member has limited effect on the lengthening of the electric arc, which makes the time for the free electric arc to dissipate long, and the free electric arc has the possibility of reignition. Moreover, the temperature of the electric arc is high, and the arc separation member will be burned by the electric arc during the process of lengthening the electric arc. Therefore, after long-term use, the arc separation member is burned by the electric arc, which leads to the deterioration of the insulation performance, and is not conducive to arc extinguishing.

[0196] The present disclosure also provides an arc extinguishing structure of a switching device and a switching device, which cooperate with the arc separation member and the arc extinguishing grid to improve the ionization dissipation speed of the electric arc in the air and enhance the arc extinguishing performance of the switching device.

[0197] The technical scheme of the arc extinguishing structure of the switching device comprises:

[0198] An arc extinguishing structure of a switching device, which is used to extinguish the electric arc of a contact component, the contact component comprising a stationary contact and a moving contact execution assembly provided with a moving contact, the arc extinguishing structure comprising an arc separation member and an arc extinguishing grid assembly, the arc separation member being used to be linked with the moving contact execution assembly, the arc separation member comprising an arc separation part, the arc separation member being selectively switched to an arc separation position under the driving of the moving contact execution assembly to form a physical isolation barrier between the broken moving contact and the stationary contact by the arc separation part, the arc extinguishing grid assembly comprising a plurality of arc extinguishing pieces arranged at intervals, at least a part of the arc extinguishing pieces being arranged on at least one side of the movement track of the arc separation part and covering the partial area on at least one side of the movement track, so that the arc separation part presses at least a part of the electric arc to the arc extinguishing grid assembly with the action of the arc separation member.

[0199] In one embodiment, the arc extinguishing pieces of the arc extinguishing grid assembly are divided into multiple parts, wherein the first part of the arc extinguishing pieces constitutes a first grid group, the arc extinguishing pieces of the first grid group are arranged at intervals along one side of the movement track of the arc separation part and cooperate with the arc separation part to form a small gap, so that the arc separation part presses at least a part of the electric arc to the first grid group with the action of the arc separation member.

[0200] In one embodiment, an insulating arc-shielding part is further included, which is arranged in a partial ring around the first group of arc-shielding blades in a direction away from the arc-shielding part.

[0201] In one embodiment, the second part of the arc-shielding blade assembly is composed of a second group of arc-shielding blades, which is arranged on one side of the movement track of the arc-shielding part and forms a small gap with the arc-shielding part. The second group of arc-shielding blades and the first group of arc-shielding blades are arranged on opposite sides of the movement track of the arc-shielding part. The arc-shielding blades of the second group of arc-shielding blades are arranged along the movement track of the arc-shielding part, so that the arc-shielding part also presses the arc towards the second group of arc-shielding blades as the arc-shielding part moves.

[0202] In one embodiment, the third part of the arc-shielding blade assembly is composed of a third group of arc-shielding blades, which are arranged along the movement track of the movable contact part, so that a part of the arc is pressed towards the third group of arc-shielding blades as the movable contact part moves in the breaking direction.

[0203] In one embodiment, the third group of arc-shielding blades is provided with a protruding part, which is arranged to overlap at least a part of the movable contact part in its extension direction.

[0204] In one embodiment, the arc-shielding part is arranged to rotate on a base. The arc-shielding part is a cover-shaped structure, which includes an arc-shielding rotating shaft arranged to rotate on the base. The arc-shielding part is an arc-shaped plate-shaped structure arranged in a ring around the arc-shielding rotating shaft. The arc-shielding part is arranged on the side of the first connecting part away from the base. The side of the first connecting part facing the base is provided with a first sliding structure. The base is provided with a second sliding structure. The first sliding structure and the second sliding structure are in concave-convex cooperation.

[0205] In one embodiment, the first sliding structure is a sliding groove, the second sliding structure is a sliding plate protruding from the surface of the base, and the shapes of the sliding plate and the sliding groove correspond; and / or,

[0206] The arc-shielding part is also used to cut the arc during switching to the arc-shielding position. The end of the arc-shielding part used to cut the arc is defined as the arc-cutting end. The arc-shielding blade assembly is arranged at the end where the arc-cutting end of the arc-shielding part is located, so that at least a part of the arc-shielding blades cover the area where the arc-cutting end of the arc-shielding part is located on at least one side of the arc-shielding part. A second connecting part is arranged at the opposite end of the arc-cutting end of the arc-shielding part.

[0207] The technical solutions of the present disclosure further include:

[0208] A kind of switchgear, including base assembly and the contact component of arc extinguishing structure arranged in the base assembly, wherein the arc extinguishing structure and the contact component described above one kind of switchgear arc extinguishing structure form connecting relationship.

[0209] In one embodiment, the switchgear is a disconnector or a circuit breaker.

[0210] The present disclosure has the following advantages:

[0211] 1, the arc extinguishing structure includes arc separation piece with arc separation part and arc extinguishing grid piece assembly, at least a part of arc extinguishing piece of arc extinguishing grid piece assembly is arranged at least one side of the movement track of arc separation part and covers the partial area of at least one side of the movement track, so that in the process of arc separation piece movement, arc separation part can lengthen arc and press the arc that is lengthened to arc extinguishing grid piece assembly located at its side, shorten the time of free arc dissipation by arc extinguishing grid piece assembly, prevent arc separation piece from being burned by arc in the process of lengthening arc, guarantee arc extinguishing performance.

[0212] 2, first grid piece group and second grid piece group are arranged at two sides of the movement track of arc separation part respectively, so that in the process of arc separation piece movement, arc separation part press a part of arc to the interval between adjacent arc extinguishing pieces of first grid piece group and second grid piece group through the small gap between it and first grid piece group and second grid piece group, so as to further cut arc, also can increase the opening distance between moving contact and static contact, prevent arc from reigniting.

[0213] 3, third grid piece group is arranged at one side of the movement track of moving contact, so as to take advantage of the movement of moving contact to take arc to the interval between adjacent arc extinguishing pieces of third grid piece group, realize further cutting of arc, and increase the opening distance between moving contact and static contact to prevent arc from reigniting.

[0214] 4, the arc separation piece of cover-shaped structure and base rely on first sliding structure and second sliding structure to form concave-convex cooperation, can prevent arc from passing through the gap between first connecting part and base to reignite, cooperate with arc separation part to increase arc separation effect, further reduce the probability of arc reignition.

[0215] The specific embodiments of the switchgear and arc extinguishing structure of the present disclosure are described in detail below with reference to the accompanying drawings.

[0216] Embodiment 1 of the arc extinguishing structure of the switchgear

[0217] Referring to Figs. 24-26, the arc extinguishing structure of the switchgear provided by the present disclosure is used to extinguish the arc of the contact component 1b, which includes the static contact 11b and the action execution assembly 13b provided with the moving contact 12b. The action execution assembly 13b is a rotating disc, and the moving contact 12b extends along the radial direction of the rotating disc to form a moving contact on each side of the rotating disc. Correspondingly, the static contact 11b is provided with two static contacts corresponding to the moving contacts 12b, thereby forming two sets of contact groups. The moving contact 12b rotates under the action of the action execution assembly 13b to switch between the on position and the off position. When the moving contact 12b is in the on position, the moving contact 12b is electrically connected to the static contact 11b. When the moving contact 12b is in the off position, the moving contact 12b is separated from the static contact 11b.

[0218] The arc extinguishing structure includes the arc separation piece 2b and the arc extinguishing grid assembly 3b. The arc separation piece 2b is rotatably arranged on the base assembly 4b and is connected to the action execution assembly 13b through a gear transmission structure. With the action of the action execution assembly 13b, the arc separation piece 2b rotates to switch between the avoidance position and the arc separation position. The arc separation piece 2b of the present embodiment is a cover-shaped structure, which includes an arc separation part 21b. When the moving contact 12b is in the on position, the arc separation piece 2b is switched to the avoidance position under the action of the action execution assembly 13b. When the moving contact 12b is in the off position, the arc separation piece 2b is switched to the arc separation position under the action of the action execution assembly 13b, so that the arc separation part 21b forms a first physical isolation barrier between the separated moving contact 12b and the static contact 11b, thereby separating the arc of the moving contact 12b and the static contact 11b.

[0219] The arc separation piece 2b and the arc extinguishing grid assembly 3b are respectively provided with two sets, forming two sets of arc extinguishing structures, each set of arc extinguishing structure corresponding to a set of contact groups.

[0220] Referring to Figs. 24-28, the arc extinguishing grid assembly 3b includes a plurality of arc extinguishing pieces arranged at intervals. At least a part of the arc extinguishing pieces is arranged on at least one side of the movement track of the arc separation part 21b and covers a part of the area on the at least one side, so that the arc separation part 21b presses a part of the arc towards the arc extinguishing grid assembly 3b with the action of the arc separation piece 2b. The movement track of the arc separation part 21b refers to the area passed by the arc separation part 21b during the switching movement between the avoidance position and the arc separation position. The arc separation part 21b of the present embodiment is a plate-shaped structure, so its movement track is a linear structure.

[0221] In this embodiment, the arc extinguishing fin assembly 3b is arranged on both sides of the movement track of the arc separation part 21b, the arc extinguishing fins of the arc extinguishing fin assembly 3b are divided into two parts, the first part of the arc extinguishing fins forms the first fin group 31b, and the second part of the arc extinguishing fins forms the second fin group 32b, and the first fin group 31b and the second fin group 32b are arranged on opposite sides of the movement track. The arc extinguishing fins of the first fin group 31b are arranged at intervals along the movement track of the arc separation part 21b and form a small gap with the arc separation part 21b, so that the arc separation part 21b presses a part of the arc to the first fin group 31b. The arc extinguishing fins of the second fin group 32b are arranged at intervals along the movement track of the arc separation part 21b, and the second fin group 32b also forms a small gap with the arc separation part 21b, so that the arc separation part 21b also presses the arc to the second fin group 32b with the movement of the arc separation part 2b.

[0222] The arc extinguishing fins of the first fin group 31b and the second fin group 32b protrude in the direction of the arc separation part 21b by a certain distance, and the distance between the edge of the protruding part of the arc extinguishing fin and the arc separation part 21b is the minimum distance between the arc extinguishing fin and the arc separation part 21b. The minimum distance is the distance between the first fin group 31b or the second fin group 32b and the arc separation part 21b.

[0223] In this embodiment, the arc extinguishing fin assembly 3b is arranged on both sides of the movement track of the arc separation part 21b, the arc extinguishing fins of the arc extinguishing fin assembly 3b are divided into two parts, the first part of the arc extinguishing fins forms the first fin group 31b, and the second part of the arc extinguishing fins forms the second fin group 32b, and the first fin group 31b and the second fin group 32b are arranged on opposite sides of the movement track. The arc extinguishing fins of the first fin group 31b are arranged at intervals along the movement track of the arc separation part 21b and form a small gap with the arc separation part 21b, so that the arc separation part 21b presses a part of the arc to the first fin group 31b. The arc extinguishing fins of the second fin group 32b are arranged at intervals along the movement track of the arc separation part 21b, and the second fin group 32b also forms a small gap with the arc separation part 21b, so that the arc separation part 21b also presses the arc to the second fin group 32b with the movement of the arc separation part 2b.

[0224] In this embodiment, the arc extinguishing fin assembly 3b is arranged on both sides of the movement track of the arc separation part 21b, the arc extinguishing fins of the arc extinguishing fin assembly 3b are divided into two parts, the first part of the arc extinguishing fins forms the first fin group 31b, and the second part of the arc extinguishing fins forms the second fin group 32b, and the first fin group 31b and the second fin group 32b are arranged on opposite sides of the movement track. The arc extinguishing fins of the first fin group 31b are arranged at intervals along the movement track of the arc separation part 21b and form a small gap with the arc separation part 21b, so that the arc separation part 21b presses a part of the arc to the first fin group 31b. The arc extinguishing fins of the second fin group 32b are arranged at intervals along the movement track of the arc separation part 21b, and the second fin group 32b also forms a small gap with the arc separation part 21b, so that the arc separation part 21b also presses the arc to the second fin group 32b with the movement of the arc separation part 2b.

[0225] The base assembly 4b includes a base 41b and an upper cover, the upper cover is arranged opposite to the base 41b and a cavity for mounting the contact part 1b and the arc extinguishing structure is formed between the base 41b and the upper cover, and the arc extinguishing fins of the first fin group 31b and the second fin group 32b are respectively inserted into the upper cover of the base assembly 4b. However, the installation of the arc extinguishing fins is not limited to this, and the arc extinguishing fins of the first fin group 31b can also be inserted into the base 41b of the base assembly 4b.

[0226] The arc-extinguishing grid piece assembly 3b further comprises an insulating arc-blocking part 34b, which is arranged in a partially surrounding manner on the first grid piece group 31b in a direction away from the arc-shielding part 21b. The arc-blocking part 34b and the base assembly 4b cooperate to form an arc-extinguishing chamber structure, so that the arc-blocking part 34b can block the movement of the free arc outward, prevent the influence on the electrical performance of the switch device, and ensure the reliability of arc extinguishing. The arc-blocking part 34b of the embodiment is a plate-shaped structure arranged outside the first grid piece group 31b. More specifically, the arc-blocking part 34b is integrally formed on the plastic base 41b of the base assembly 4b. Therefore, the arc-blocking part 34b is made of insulating material, can effectively block the free arc, and can also prolong the creepage distance between the moving contact part 12b and the static contact part 11b, prevent arc reignition, and further improve the arc-extinguishing performance of the switch device. In other embodiments, the arc-blocking part 34b can also be a separate part fixedly connected to the base assembly 4b, and the arc-blocking part 34b is made of insulating material.

[0227] Referring to FIGS. 26 and 28, the arc-shielding part 2b is movably arranged on the base 41b of the base assembly 4b. The arc-shielding part 2b further comprises a first connecting part 22b, the arc-shielding part 21b is connected to the first connecting part 22b and extends away from the base 41b relative to the first connecting part 22b. The base 41b is provided with a first sliding structure 411b, and the side of the first connecting part 22b facing the base 41b is provided with a second sliding structure 221b. The first sliding structure 411b and the second sliding structure 221b are in concave-convex cooperation. Specifically, the first sliding structure 411b is a slide plate protruding from the surface of the base 41b, and the second sliding structure 221b is a slide groove corresponding in shape to the slide plate. In other embodiments, the structures of the first sliding structure 411b and the second sliding structure 221b can be reversed, i.e., the first sliding structure 411b is a slide groove, and the second sliding structure 221b is a slide plate.

[0228] The concave-convex cooperation between the first sliding structure 411b and the second sliding structure 221b can compensate for the gap between the arc-shielding part 2b and the base 41b, prevent the free arc remaining after cutting by the arc-extinguishing grid piece assembly 3b from passing through the gap between the arc-shielding part 2b and the base 41b, and cause arc reignition.

[0229] Referring to Figs. 24-28, since the arc separation piece 2b is a cover-shaped structure, the end of the arc separation part 21b is also used to cut the electric arc during switching to the arc separation position, and the end of the arc separation part 21b used to cut the electric arc is defined as the arc cutting end 210b. In order to enable the electric arc to be smoothly pressed towards the gap between the adjacent arc extinguishing pieces during being lengthened, the arc extinguishing piece assembly 3b is arranged at the end where the arc cutting end 210b of the arc separation part 21b is located, so that the arc extinguishing pieces of the arc extinguishing piece assembly 3b cover the area where the arc cutting end 210b of the arc separation part 21b is located on both sides, and more specifically, when the arc separation part 21b switches to the arc separation position, the arc extinguishing piece assembly 3b is located on both sides of the arc separation part 21b and is biased towards the end where the arc cutting end 210b is located. The arc separation piece 2b further comprises a second connecting part 23b connected to the arc separation part 21b and the first connecting part 22b, and the second connecting part 23b is located on the side of the arc separation part 21b away from the arc extinguishing piece assembly 3b, so that the arc separation piece 2b forms a cover-shaped structure that semi-surrounds the static contact part 11b. If there is no second connecting part 23b, the free electric arc can re-ignite through the end of the arc separation part 21b away from the arc extinguishing piece assembly 3b (i.e. the end where the second connecting part 23b is located). Therefore, the cooperation of the cover-shaped arc separation piece 2b and the arc extinguishing piece assembly 3b in this embodiment can better prevent the electric arc from re-igniting and improve the arc extinguishing performance of the arc extinguishing structure.

[0230] Arc extinguishing structure of switchgear

[0231] Referring to Figs. 29-31, the difference between this embodiment and the first embodiment is that the arc extinguishing piece assembly 3b is composed of a first piece group 31b and a third piece group 33b, and the arc extinguishing pieces of the arc extinguishing piece assembly 3b include a first part and a third part, and the arc extinguishing pieces of the third part are used to be arranged at intervals along the movement trajectory of the moving contact part 12b to form the third piece group 33b, so as to press a part of the electric arc towards the third piece group 33b by means of the movement of the moving contact part 12b along the breaking direction. The first piece group 31b and the third piece group 33b are adjacent, and as the moving contact part 12b moves from the conducting position to the breaking position, the moving contact part 12b and the arc separation part 21b synchronously press the electric arc towards the arc extinguishing pieces, so as to realize arc extinguishing. In the state of contact breaking, the cooperation of the arc separation piece 2b and the arc extinguishing piece assembly 3b increases the opening distance between the moving contact part 12b and the static contact part 11b, i.e. the creepage distance between the moving contact part 12b and the static contact part 11b is increased, which improves the arc extinguishing performance and reduces the probability of arc re-ignition.

[0232] Referring to Fig. 28, the third grid group 33b is provided with a protruding portion 331b which is used to overlap a part of the moving contact 12b in the extending direction thereof. The protruding portion 331b of the present embodiment is a protruding structure formed by extending the arc extinguishing blades to both sides of the moving contact 12b by a certain distance respectively, and a gap for the movement of the moving contact 12b is formed between the two protruding structures. In other embodiments, the protruding portion 331b can also be formed by extending the arc extinguishing blades to only one side of the moving contact 12b, which can be the side of the moving contact 12b facing the base 41b or the side of the moving contact 12b facing away from the base 41b. With the movement of the moving contact 12b, the arc between the moving contact 12b and the stationary contact 11b is elongated and is squeezed between the adjacent arc extinguishing blades of the third grid group 33b to achieve arc extinguishing. The presence of the protruding portion 331b is conducive to the arc entering between the adjacent arc extinguishing blades of the third grid group 33b, further improving the arc extinguishing effect of the arc extinguishing grid assembly 3b and improving the arc extinguishing performance of the arc extinguishing structure.

[0233] Embodiment 3 of the arc extinguishing structure of the switch apparatus

[0234] The difference between the present embodiment and the above-mentioned embodiments 1 and 2 lies in the structure of the arc separation member 2b. The arc separation member 2b of the present embodiment is of a plate structure, which can be a flat plate structure or an arc-shaped plate structure, and the main body of the arc separation member 2b serves as the arc separation portion 21b. At this time, the arc extinguishing blades of the arc extinguishing grid assembly 3b can be arranged only on the side of the arc separation portion facing away from the moving contact, only on the side of the arc separation portion facing the moving contact, or on both sides of the arc separation portion (i.e. on the side facing away from the moving contact and on the side facing the moving contact). When the space permits, the arc extinguishing blades can be arranged around the arc separation portion.

[0235] In the above-mentioned embodiments, the arc extinguishing grid assembly 3b includes the first grid group 31b and the second grid group 32b, or includes the first grid group 31b and the third grid group 33b, so that the first grid group 31b and the second grid group 32b cooperate or the first grid group 31b and the third grid group 33b cooperate to improve the arc extinguishing performance of the arc extinguishing structure. In other embodiments, the first grid group 31b is not limited to the arc extinguishing blades arranged on the outside of the arc-shaped movement track of the arc separation portion 21b, and the first grid group 31b can also refer to the arc extinguishing blades arranged on the inside of the arc-shaped movement track of the arc separation portion 21b (i.e. the positions of the first grid group 31b and the second grid group 32b are interchanged). If the current is small enough, only the first grid group 31b can be arranged; in addition, it is also feasible for the first grid group 31b, the second grid group 32b and the third grid group 33b to cooperate to achieve the arc extinguishing function of the arc extinguishing grid assembly 3b, further improving the arc extinguishing performance in order to cope with situations with larger currents.

[0236] In the above embodiments, the arc-extinguishing pieces of the arc-extinguishing piece assembly 3b are arranged along the movement track of the arc-shedding portion 21b or the movable contact portion 12b, so that the arc can be quickly pressed into the adjacent arc-extinguishing pieces during the process of being elongated. In other embodiments, the arc-extinguishing pieces can also be arranged along a direction parallel or close to the movement track, or along the relative position direction of the base 41b and the upper cover.

[0237] Switching device embodiment

[0238] The switching device of the present embodiment is a disconnecting switch or a circuit breaker, which comprises a base assembly 4b and an arc-extinguishing structure and a contact component 1b arranged on the base assembly 4b. The structure of the arc-extinguishing structure, the contact component 1b and the base assembly 4b and the connection relationship therebetween have been described in Embodiment 1 to Embodiment 3, which will not be repeated here.

[0239] The disconnecting switch can be used to operate the opening or closing of the circuit, and has the function of quickly opening or closing to minimize the influence of the arc. Such a switching device is usually configured to be manually or by other tools operated by an operator to operate a lever to operate the movable contact to open or engage the static contact through a series of linked components. The disconnecting switch can isolate the non-live part from the live part when it is opened, and form a clear opening point to isolate the faulty equipment or the equipment under maintenance. When the electrical equipment is under maintenance, the equipment under maintenance is isolated from the power supply to prevent safety accidents. The disconnecting switch is widely used in power distribution systems and automation systems of the building, power, petroleum and chemical industries and other industries. The common rotary disconnecting switch comprises an operating mechanism and a contact system, and the contact system comprises a movable contact and a static contact. The operating mechanism of the disconnecting switch drives the movable contact to move through the movement of the rotating element, so as to disconnect or engage the static contact. The operating mechanism of the current disconnecting switch is complex and occupies a large space, which is not conducive to the miniaturization of the product.

[0240] Therefore, the present disclosure also provides a disconnecting switch and an operating mechanism thereof.

[0241] The present disclosure adopts the following scheme:

[0242] The present disclosure provides a disconnecting switch operating mechanism, which comprises a base and a linkage member, the linkage member is rotatably arranged in the base, the rotation of the linkage member is used to actuate the contact system of the disconnecting switch to realize opening and closing, a connecting rod and an energy storage element are connected between the linkage member and the base, the rotation of the linkage member can actuate the energy storage element to store energy, the connecting rod is used to guide and limit the energy storage element, one end of the connecting rod is hinged and positioned relative to the base, the other end of the connecting rod is rotatable and slidably connected to the linkage member.

[0243] In one embodiment, the linkage member is provided with a pivot shaft, and one end of the connecting rod is provided with a sliding slot, the pivot shaft of the linkage member is arranged in the sliding slot, so that the one end of the connecting rod is rotatably and slidably connected to the linkage member.

[0244] In one embodiment, the energy storage element is directly or indirectly sleeved on the connecting rod.

[0245] In one embodiment, the energy storage element is a compression spring, the compression spring is directly sleeved on the connecting rod, and the length of the sliding slot on the connecting rod covers at least a part of the energy storage compression stroke of the compression spring.

[0246] In one embodiment, one end of the connecting rod is hingedly connected to the base through a pin shaft, two sliding sleeves are sleeved on the pin shaft, one end of the compression spring abuts against the pin shaft through the sliding sleeves, and the other end of the compression spring abuts against the pivot shaft.

[0247] In one embodiment, a main shaft, a first gear and a second gear in meshing transmission are further included, the first gear is coaxially connected to one end of the main shaft, the second gear and the linkage member are matched through a plug-in structure to realize synchronous rotation, a first cylindrical structure is arranged on the linkage member, a first connecting structure is arranged on the first cylindrical structure, a second cylindrical structure is arranged on the second gear, a second connecting structure is arranged on the second cylindrical structure, the first connecting structure and the second connecting structure are a set of plug-in matched butt cylinders and butt holes, and the first cylindrical structure and / or the second cylindrical structure serves as the pivot shaft.

[0248] In one embodiment, a main shaft, a first gear and a second gear in meshing transmission are further included, the first gear is coaxially connected to one end of the main shaft, the second gear and the linkage member are matched through a plug-in structure to realize synchronous rotation, a first cylindrical structure is arranged on the linkage member, a first connecting structure is arranged on the first cylindrical structure, a second cylindrical structure is arranged on the second gear, a second connecting structure is arranged on the second cylindrical structure, the first connecting structure and the second connecting structure are a set of plug-in matched butt cylinders and butt holes, and the first cylindrical structure and / or the second cylindrical structure serves as the pivot shaft.

[0249] In one embodiment, the axis of the first gear and the axis of the second gear are perpendicular to each other.

[0250] In one embodiment, the energy storage element and the connecting rod constitute an energy storage assembly, the energy storage assembly is provided in two groups and is arranged symmetrically about the center of the rotation axis of the linkage member, and the linkage member is provided with two pivot shafts which are respectively matched with the two groups of energy storage assemblies.

[0251] In one embodiment, a main shaft is further included, the main shaft is drivingly connected to the linkage member and can drive the linkage member to rotate, the main shaft includes a first shaft segment and a second shaft segment, and the first shaft segment and the second shaft segment are intermittently drivingly connected.

[0252] In one embodiment, one end of the first shaft segment is provided with a first transmission structure, one end of the second shaft segment is provided with a second transmission structure, and the first transmission structure and the second transmission structure are a set of shafts provided with key teeth and shaft holes provided with key grooves which can be drivingly matched with each other, and the central angle of the key grooves is greater than the central angle of the key teeth, so as to realize the intermittent driving connection of the first shaft segment and the second shaft segment.

[0253] The present disclosure further provides an isolating switch including the isolating switch operating mechanism as described above.

[0254] The technical scheme provided by the present disclosure has the following technical effects:

[0255] The present disclosure provides an isolating switch operating mechanism including a base, a main shaft and a linkage member, the main shaft is drivingly connected to the linkage member and can drive the linkage member to rotate, the rotation of the linkage member is used to actuate a contact system of an isolating switch to realize opening and closing, the rotation of the linkage member can compress the energy storage element to store energy, and a connecting rod is used to guide and limit the energy storage element, one end of the connecting rod is hingedly connected to the base, and the other end of the connecting rod is rotatably and slidably connected to the linkage member. Compared with the rotatable and slidable connection between the connecting rod and the base, in the present disclosure, the connecting rod and the linkage member are rotatably and slidably connected, so that the pushing of the linkage member makes one end of the connecting rod protrude into the linkage member, so that the base has a smaller volume, the product is more compact, and the structure of the present disclosure is simple, easy to manufacture and can reduce the cost.

[0256] The present disclosure will be further described in combination with the drawings and specific embodiments.

[0257] As shown in FIGS. 32-38, the present embodiment provides an isolating switch operating mechanism 1c including a base 10c, a main shaft 70c, a first gear 80c, a second gear 20c, an energy storage element 30c, a pin shaft 40c, a connecting rod 50c and a linkage member 60c.

[0258] The first gear 80c is coaxially connected to one end of the main shaft 70c for transmitting the rotating motion, such as the rotating motion of a handle, which can actuate the contact system to open or close. Specifically, the main shaft 70c is perpendicular to the second gear 20c, the first gear 80c includes a first bevel gear structure 81c, the second gear 20c includes a second bevel gear structure 21c, and the bevel gear structures of the first gear 80c and the second gear 20c are matched with each other to vertically transmit the power.

[0259] Referring to FIG. 37, the second gear 20c and the linkage member 60c are rotatably arranged in the base 10c, and the second gear 20c and the linkage member 60c are matched with each other through the plug-in structure to rotate synchronously. The linkage member 60c is provided with a first cylindrical structure 61c, and the first cylindrical structure 61c is provided with a first connecting structure 611c. The second gear 20c is provided with a second cylindrical structure 22c, and the second cylindrical structure 22c is provided with a second connecting structure 221c. The first connecting structure 611c and the second connecting structure 221c are a set of cylindrical and hole structures that can be matched with each other to realize the plug-in matching of the second gear 20c and the linkage member 60c.

[0260] In this embodiment, the first cylindrical structure 61c is provided with a plug-in cylinder 611c, and the second cylindrical structure 22c is provided with a plug-in hole 221c. The plug-in cylinder 611c can be matched with the plug-in hole 221c.

[0261] The linkage member 60c is drivingly connected to the actuating mechanism of the contact system. The rotation of the main shaft 70c can realize the rotation of the linkage member 60c, and the rotation of the linkage member 60c can actuate the contact system to open or close.

[0262] In this embodiment, the power is vertically transmitted by the main shaft 70c being perpendicular to the second gear 20c. In other embodiments, the main shaft 70c can be parallel to the second gear 20c or at a certain angle according to the specific rotating direction, which can also realize the transmission of the power. Alternatively, the main shaft 70c can be directly connected to the linkage member 60c, which is also a feasible technical solution.

[0263] The energy storage element 30c can be a compression spring or a tension spring or other energy storage element such as a gas spring. The present embodiment takes the compression spring as an example for illustration. The rotation of the linkage member 60c can actuate the energy storage element 30c to store energy. In the present embodiment, the rotation of the linkage member 60c can compress the compression spring to store energy. The energy storage element 30c is sleeved on the connecting rod 50c, and the connecting rod 50c is used to guide and limit the energy storage element 30c when storing energy or releasing energy. One end of the connecting rod 50c is hinged and positioned relative to the base 10c. For example, one end of the connecting rod 50c is hinged to the base 10c through the pin shaft 40c, so that one end of the connecting rod 50c is hinged and positioned relative to the base 10c. The other end of the connecting rod 50c is provided with a sliding groove 51c, and the butt joint cylinder 611c of the linkage member 60c is sleeved in the sliding groove 51c, so that the other end of the connecting rod 50c is rotatably and slidably connected to the linkage member 60c. The energy storage element 30c is abutted against the pin shaft 40c and the first cylinder structure 61c and / or the second cylinder structure 22c at both ends, respectively. Of course, the connecting rod 50c can also guide and limit the energy storage element 30c in other ways, for example, the connecting rod 50c is provided with a guide groove, and the energy storage element 30c is guided and limited through the guide groove. In the present embodiment, the energy storage element 30c is sleeved on the connecting rod 50c, so that the connecting rod 50c guides and limits the energy storage element 30c when storing energy or releasing energy, and the structure is simpler.

[0264] Of course, in other embodiments, when the energy storage element 30c is a gas spring, the gas spring can be sleeved on the connecting rod 50c by an accessory, for example, the gas spring can be sleeved on the connecting rod 50c by an additional sleeve.

[0265] When the energy storage element 30c is a tension spring, the tension spring is arranged to have an opposite orientation to the compression spring in the present embodiment, so that the rotation of the linkage member 60c can pull the tension spring to store energy.

[0266] In other embodiments, the sliding groove 51c of the connecting rod 50c can also be arranged at the opposite end of the present solution, that is, the end of the connecting rod 50c can be hinged with the linkage member 60c, and the other end of the connecting rod 50c is arranged with the sliding groove 51c and is in sliding connection with the pin shaft 40c, which is also a feasible technical solution. However, in this solution, the end of the connecting rod 50c provided with the sliding groove 51c will be likely to protrude outward from the base 10c due to the pushing of the linkage member 60c, resulting in the base 10c needing to have a larger volume, thereby being not conducive to the miniaturization of the product. That is, compared with the rotatable and slidable connection between the connecting rod 50c and the base 10c, in the present embodiment, the connecting rod 50c and the linkage member 60c are rotatably and slidably connected, so that the pushing of the linkage member 60c causes the end of the connecting rod 50c provided with the sliding groove 51c to protrude inwardly to the linkage member 60c, so that the base 10c has a smaller volume, the product is more compact, and the present solution has a simple structure, is easy to manufacture, and can reduce costs.

[0267] In the present embodiment, two sliding sleeves 41c are sleeved on the pin shaft 40c, so that the one end of the energy storage element 30c does not directly abut against the pin shaft 40c, but the one end of the energy storage element 30c abuts against the sliding sleeve 41c, so that the energy storage element 30c has less wear on the pin shaft 40c, and the operation of the energy storage element 30c is more flexible. In other embodiments, the first cylindrical structure 61c and the second cylindrical structure 22c can be replaced by a columnar structure with a non-cylindrical outer surface, for example, a columnar structure with a polygonal outer surface. However, in the present embodiment, the cylindrical structure is used, which can further make the operation of the energy storage element 30c more flexible.

[0268] The depth of the butt joint circular hole 221c is less than the length of the butt joint cylinder 611c, so that an assembly gap is arranged between the first cylindrical structure 61c and the second cylindrical structure 22c, and the width of the assembly gap is slightly greater than the thickness of the connecting rod 50c, so that the butt joint cylinder 611c of the linkage member 60c is arranged in the sliding groove 51c; the connecting rod 50c is positioned in the gap between the first cylindrical structure 61c and the second cylindrical structure 22c in the thickness direction, which is conducive to the position stability of the connecting rod 50c and can guide the movement of the connecting rod 50c. Of course, in other embodiments, no gap is arranged between the first cylindrical structure 61c and the second cylindrical structure 22c, that is, the first cylindrical structure 61c and the second cylindrical structure 22c are tightly fitted, and the first cylindrical structure 61c and / or the second cylindrical structure 22c is arranged in the sliding groove 51c, which is also a feasible technical solution.

[0269] As shown in FIG. 32, the linkage member 60c is rotated from the first position shown in the figure along the direction B, and the rotation direction of the main shaft 70c is the direction A. At this time, the first cylindrical structure 61c slides in the sliding groove 51c, and the distance between the first cylindrical structure 61c and the pin shaft 40c is shortened, so that the energy storage element 30c is compressed to store energy; as shown in FIG. 33, the rotation of the linkage member 60c makes the compression degree of the energy storage element 30c reach the maximum value, so that the energy storage element 30c stores the maximum energy, and at this time the linkage member 60c rotates to the dead point position. After reaching this position, the linkage member 60c continues to rotate along the direction B, and as shown in FIG. 34, after the linkage member 60c rotates past the dead point, the energy storage element 30c releases energy to drive the linkage member 60c to rotate rapidly, and the linkage member 60c rotates to the second position shown in FIG. 34.

[0270] As described above, since the linkage member 60c is connected in transmission with the actuating mechanism of the contact system, when the linkage member 60c rotates from the first position shown in FIG. 32 to the second position shown in FIG. 34, the contact state of the contact system is switched from the first state to the second state, for example, the contact system is switched from the open state to the closed state. At least a part of the length of the sliding groove 51c on the connecting rod 50c covers the energy storage compression stroke of the compression spring.

[0271] The energy storage element 30c and the connecting rod 50c constitute an energy storage assembly. In the embodiment, two groups of central symmetric energy storage assemblies are provided, which are matched with the two cylindrical structures of the linkage member 60c. Compared with the energy storage assembly provided with only one group, the energy storage assembly of the embodiment is provided with two groups and is centrally symmetric around the rotation axis of the linkage member 60c, so that symmetrical compression energy storage can be realized, the stress is more balanced, the friction of the main shaft 70c on the base 10c is reduced, the part wear is smaller, and the product service life can be significantly prolonged.

[0272] The first bevel gear structure 81c of the first gear 80c is a sector bevel gear structure, and the second bevel gear structure 21c of the second gear 20c is a sector bevel gear structure, so that the machining of the parts is simpler and the material is less, and at the same time it is beneficial to fully utilize the installation space of the base 10c, and the product miniaturization is improved.

[0273] The outer end of the sliding slot 51c is defined as the end of the sliding slot 51c away from the center of the connecting rod 50c. The sliding slot 51c of the connecting rod 50c can serve as a limiting structure to limit the rotation of the linkage member 60c. For example, when the linkage member 60c is in the first position as shown in FIG. 32 or the second position as shown in FIG. 34, the cylindrical structure of the linkage member 60c is at the outer end of the sliding slot 51c, so that the sliding slot 51c limits the maximum rotation angle of the linkage member 60c. Of course, in other embodiments, the sliding slot 51c does not serve as a limiting structure, and when the linkage member 60c is in the first position as shown in FIG. 32 or the second position as shown in FIG. 34, the cylindrical structure of the linkage member 60c does not reach the outer end of the sliding slot 51c, and the rotation of the linkage member 60c is limited by other structures, which is also a feasible solution. For example, the two cylindrical structures of the linkage member 60c are located at the ends of the sector bevel gear structure of the second bevel gear structure 21c, and the two cylindrical structures of the linkage member 60c serve as the limiting mechanism of the meshing end of the bevel gear structure of the first gear 80c and the second gear 20c, to limit the rotation of the linkage member 60c.

[0274] Referring to FIGS. 38-39, the main shaft 70c includes a first shaft segment 71c and a second shaft segment 72c, and the first shaft segment 71c and the second shaft segment 72c are intermittently connected in transmission. One end of the second shaft segment 72c is in transmission connection with the first shaft segment 71c.

[0275] One end of the first shaft segment 71c is provided with a first transmission structure 711c, one end of the second shaft segment 72c is provided with a second transmission structure 721c, and the other end of the second shaft segment 72c is connected with the first gear 80c. The first transmission structure 711c and the second transmission structure 721c are a set of shafts provided with key teeth and shaft holes provided with key grooves that can cooperate with each other in transmission, and the central angle corresponding to the key groove is greater than the central angle corresponding to the key tooth, so as to realize the intermittent transmission connection of the first shaft segment 71c and the second shaft segment 72c.

[0276] In this embodiment, one end of the first shaft segment 71c is provided with a transmission shaft part 712c, the transmission shaft part 712c is provided with a key tooth 711c, and the transmission shaft part 712c provided with the key tooth 711c is a first transmission structure. One end of the second shaft segment 72c is provided with a transmission shaft hole 722c, the transmission shaft hole 722c is provided with a key groove 721c, and the transmission shaft hole 722c provided with the key groove 721c is a second transmission structure. The transmission shaft part 712c and the transmission shaft hole 722c are rotatably matched, the key tooth 711c is matched in the key groove 721c, the central angle N corresponding to the key groove 721c is greater than the central angle M corresponding to the key tooth 711c, there is a transmission clearance angle K between the key groove 721c and the key tooth 711c, the transmission clearance angle K is equal to the central angle N corresponding to the key groove 721c minus the central angle M corresponding to the key tooth 711c, so that the first shaft segment 71c is in contact with the second shaft segment 72c after rotating through the transmission clearance angle K, drives the second shaft segment 72c to rotate, the second shaft segment 72c drives the first gear 80c to rotate, thereby driving the second gear 20c and the linkage member 60c to rotate, and then compressing the energy storage element 30c to achieve energy storage.

[0277] When the linkage member 60c rotates to the dead point position, as shown in FIG. 33, the energy storage element 30c stores energy to the maximum value. When the main shaft 70c continues to rotate, the energy storage mechanism passes the dead point and quickly starts to release energy. Because the first shaft segment 71c and the second shaft segment 72c are intermittently connected in transmission, there is a transmission clearance between the first shaft segment 71c and the second shaft segment 72c, so in the initial stage of energy release of the energy storage mechanism, the energy storage mechanism drives the second shaft segment 72c to rotate within the transmission clearance angle K, and after the second shaft segment 72c rotates through the transmission clearance angle K, the second shaft segment 72c drives the first shaft segment 71c to rotate, so that the energy storage mechanism can obtain a larger acceleration in the initial stage of energy release, thereby improving the initial movement speed of the actuator of the contact system, which is beneficial to realize the closing / opening of the contact system. Because in the process of manually closing / opening by the handle, the movement speed of the hand is slow relative to the millisecond-level energy release speed of the energy storage element 30c (such as a spring), if there is no transmission clearance angle K between the first shaft segment 71c and the second shaft segment 72c, the hand becomes part of the resistance in the initial stage of energy release of the energy storage element 30c, and becomes the rotation of the main shaft 70c driven by the energy storage element 30c, and the rotation of the hand driven by the main shaft 70c, which is extremely poor in operation feeling, and also affects the energy release speed of the energy storage element 30c, especially in the opening, which brings great harm, which slows down the contact separation speed and the arc transfer speed, aggravates the contact ablation, and in severe cases, the arc may not be broken, resulting in safety risks.

[0278] In this embodiment, the transmission gap angle K is about 25°. The number of key teeth 711c and the number of key grooves 721c are both 3. Of course, the number of key teeth 711c and the number of key grooves 721c can also be other numbers, as long as the number of key teeth 711c and the number of key grooves 721c correspond.

[0279] The embodiment also provides an isolating switch, which comprises the isolating switch operating mechanism 1c as described above.

[0280] The isolating switch can be used to operate the opening or closing of a circuit and has the function of quickly opening or closing to minimize the influence of arc. Such a switching device is usually configured to be operated by an operating rod manually or by other tools by an operator to operate the moving contact to open or engage the stationary contact through a series of linked components. The isolating switch can isolate the non-live part from the live part when it is opened and cause an obvious opening point to isolate the faulty equipment or the equipment under maintenance. When the electrical equipment is under maintenance, the equipment under maintenance is isolated from the power supply to prevent safety accidents. The isolating switch is widely used in power distribution systems and automation systems of the construction, power, petrochemical and other industries. The isolating switch is provided with a padlock mechanism to prevent the isolating switch from being accidentally closed, and therefore, it is desirable to obtain a padlock mechanism which can have a simpler structure and can work more reliably.

[0281] To this end, the disclosure also provides an isolating switch padlock mechanism and an operating mechanism.

[0282] The disclosure adopts the following scheme to achieve this:

[0283] The disclosure provides an isolating switch padlock mechanism, which comprises a base, a padlock piece and a main shaft, the main shaft is installed on the base, the main shaft is used to transmit rotary motion to actuate the contact system of the isolating switch to realize opening and closing, the padlock piece is slidably installed on the base, the padlock piece can slide relative to the main shaft, so that the padlock piece and the main shaft can be switched from a separated state to a clamped state, so that the main shaft is switched from being rotatable relative to the base to being limited in rotary motion.

[0284] In one embodiment, the padlock piece is provided with a first clamping structure, the main shaft is provided with a second clamping structure, the first clamping structure and the second clamping structure are a group of convex parts and locking grooves capable of clamping each other, the padlock piece can slide relative to the main shaft, so that the first clamping structure and the second clamping structure can be switched from a separated state to a clamped state, so that the padlock piece and the main shaft can be switched from a separated state to a clamped state.

[0285] In one embodiment, the shackle member is provided with a protrusion as a first clamping structure, and the main shaft is provided with a locking groove as a second clamping structure; the locking groove extends along the axial direction of the main shaft, and the shackle member can slide along the axial direction relative to the main shaft.

[0286] In one embodiment, the main shaft includes a diameter increasing portion and a clearance portion, the locking groove is arranged on the diameter increasing portion of the main shaft, and the clearance portion is formed adjacent to the diameter increasing portion of the main shaft.

[0287] In one embodiment, one end of the locking groove is provided with a stopper for limiting the sliding range of the shackle member.

[0288] In one embodiment, the shackle member is provided with a shackle portion, and the shackle portion can be exposed outside the base when the shackle member slides upward, so that the shackle member can be locked.

[0289] In one embodiment, the base is provided with a sliding groove, the shackle member is slidably arranged in the sliding groove, the side wall of the sliding groove is provided with a first limiting structure, and the shackle member is provided with a second limiting structure, so that the sliding of the shackle member is limited when the shackle member and the main shaft are in a separated state by cooperation of the first limiting structure and the second limiting structure.

[0290] In one embodiment, the side wall of the sliding groove is provided with a groove as a first limiting structure, and the shackle member is provided with a shackle protrusion as a second limiting structure, the shackle protrusion can be clamped and limited with the groove; the lower part of the shackle member is provided with a slot, so that the lower part of the shackle member is divided into two legs, and the shackle protrusion is arranged on one of the legs.

[0291] In one embodiment, the shackle member is provided with a long slot with a semicircular cross section at the root of the leg where the shackle protrusion is arranged.

[0292] The present disclosure also proposes an operating mechanism of an isolating switch, which includes the shackle mechanism as described above.

[0293] In one embodiment, the operating mechanism further includes an energy storage linkage member; the energy storage linkage member includes a linkage shaft, a gear shaft, an energy storage element, a connecting rod, and a support shaft, the end of the main shaft is a bevel gear structure, the gear shaft includes a bevel gear structure, and the bevel gear structures of the main shaft and the gear shaft are matched with each other; the gear shaft and the linkage shaft are matched with each other through a shaft hole and a cylindrical structure to realize synchronous rotation; the linkage shaft is in transmission connection with an actuating mechanism of a contact system; one end of the connecting rod is hinged to the base through the support shaft, the other end of the connecting rod is provided with a sliding groove, and the cylindrical structure of the linkage shaft is arranged in the sliding groove; the energy storage element is sleeved on the connecting rod, and the two ends of the energy storage element abut against the support shaft and the cylindrical structure of the linkage shaft, respectively.

[0294] The disclosure also provides an isolating switch comprising the operating mechanism as described above.

[0295] The technical scheme provided by the disclosure has the following technical effects:

[0296] The disclosure provides a padlock mechanism of an isolating switch, comprising a base, a padlock piece and a main shaft, the main shaft is installed on the base, the main shaft is used for transmitting rotary motion to actuate a contact system of the isolating switch to realize opening and closing, the padlock piece is slidably installed on the base, the padlock piece can slide relative to the main shaft, so that the padlock piece and the main shaft can be switched from a separated state to an engaged state, so that the main shaft is switched from being rotatable relative to the base to being limited in rotary motion. The padlock piece and the main shaft are engaged, so that the rotation of the main shaft relative to the base is limited. Compared with limiting the rotary motion of the main shaft by a locking handle, the disclosure directly limits the rotary motion of the main shaft relative to the base by the padlock piece, which is more reliable and safer.

[0297] The disclosure will be further described in conjunction with the drawings and specific embodiments.

[0298] As shown in FIGS. 40-48, the embodiment provides an operating mechanism of an isolating switch, comprising a base 10d, a padlock piece 20d, a main shaft 30d and an energy storage linkage member 40d. The energy storage linkage member 40d comprises a linkage shaft 41d, a gear shaft 42d, an energy storage element 43d, a connecting rod 44d and a support shaft 45d.

[0299] The main shaft 30d is a gear shaft, which is used for transmitting rotary motion, such as the rotary motion of a handle, which can actuate a contact system of the isolating switch to realize opening and closing. Specifically, the end of the main shaft 30d is a bevel gear structure, the gear shaft 42d also comprises a bevel gear structure, and the bevel gear structures of the main shaft 30d and the gear shaft 42d are matched with each other to realize vertical power transmission. The gear shaft 42d and the linkage shaft 41d are matched by inserting the shaft hole into the cylindrical structure to realize synchronous rotation. The linkage shaft 41d is drivingly connected to an actuating mechanism of the contact system. Through the rotation of the main shaft 30d, the rotation of the linkage shaft 41d is realized, thereby driving the contact system to realize opening and closing.

[0300] One end of the connecting rod 44d is hinged to the base 10d through the pivot 45d, and the other end of the connecting rod 44d is provided with a sliding groove in which a cylindrical structure of the linkage shaft 41d is arranged. The energy storage element 43d can be a compression spring. The energy storage element 43d is sleeved on the connecting rod 44d, and the two ends are respectively abutted against the pivot 45d and the cylindrical structure of the linkage shaft 41d. When the linkage shaft 41d rotates, the cylindrical structure moves in the sliding groove, drives the energy storage element 43d to store energy, and reaches the dead point position when the energy storage is maximum. After rotating over the dead point, the energy storage element 43d releases energy to drive the linkage shaft 41d to rotate rapidly.

[0301] The base 10d, the padlock piece 20d and the main shaft 30d form a padlock mechanism of the isolating switch, which is used to lock the rotation of the main shaft 30d, so as to prevent the isolating switch from being accidentally closed. The padlock piece 20d is slidably arranged on the base 10d, and the padlock piece 20d can slide relative to the main shaft 30d, so that the padlock piece 20d and the main shaft 30d can be switched from a separated state to an engaged state, so that the main shaft 30d is switched from being rotatable relative to the base 10d to being limited in rotational movement.

[0302] In other application scenarios, the padlock mechanism for limiting the rotational movement of the main shaft by the locking handle can also be used to prevent the isolating switch from being accidentally closed. However, in the embodiment, the padlock piece and the main shaft are engaged, which can directly act on the main shaft, so that the rotation of the main shaft relative to the base is limited. Compared with limiting the rotational movement of the main shaft by the locking handle, the embodiment directly locks the rotational movement of the main shaft relative to the base by the padlock piece, which is more reliable and safer.

[0303] The padlock piece 20d is provided with a first clamping structure, and the main shaft 30d is provided with a second clamping structure. The first clamping structure and the second clamping structure are a group of convex parts and locking grooves capable of being clamped and matched with each other. When the padlock piece 20d slides relative to the main shaft 30d, the first clamping structure and the second clamping structure can be switched from a separated state to an engaged state, so as to lock the rotational movement of the main shaft 30d. In some other embodiments, the padlock piece 20d and the main shaft 30d can be separated or engaged through magnetic attraction structure, or the padlock piece 20d and the main shaft 30d can be separated or engaged through clamping structure.

[0304] In the embodiment, the padlock piece 20d is provided with a convex part 21d as the first clamping structure, and the main shaft 30d is provided with a locking groove 31d as the second clamping structure. The base 10d is provided with a sliding groove 11d, and the padlock piece 20d is slidably arranged in the sliding groove 11d. When the padlock piece 20d slides upward, the convex part 21d of the padlock piece 20d is engaged with the locking groove 31d of the main shaft 30d, so as to limit the rotational movement of the main shaft 30d. The structure is simple and reliable. In the embodiment, the convex part 21d is a convex block structure. In some other embodiments, the convex part 21d can also be a convex column, a convex point, etc.

[0305] The shackle part 20d is provided with a shackle part 23d. When the shackle part 20d slides upward, the rotation movement of the main shaft 30d is limited. At this time, the shackle part 23d is exposed outside the base 10d so as to be able to be shackled, that is, the shackle part 20d is locked at the position of limiting the rotation movement of the main shaft 30d by the shackle part 23d using a padlock, preventing misoperation, and being safer.

[0306] Referring to FIGS. 43-44, in the embodiment, the lock slot 31d is arranged along the axial direction of the main shaft 30d, and the shackle part 20d can slide along the axial direction relative to the main shaft 30d, so that the convex part 21d of the shackle part 20d and the lock slot 31d of the main shaft 30d can be engaged or separated. In some other embodiments, the shackle part 20d can also slide relative to the main shaft 30d along the direction perpendicular to the axial direction, so that the convex part 21d of the shackle part 20d and the lock slot 31d of the main shaft 30d can be engaged or separated. However, this way causes the size of the base 10d in the direction perpendicular to the axial direction of the main shaft 30d to increase, and is not conducive to the effective arrangement of the shackle part. In the embodiment, the shackle part 20d can slide along the axial direction relative to the main shaft 30d, so that the product has a smaller volume, and the arrangement of the shackle part is more convenient.

[0307] The lock slot 31d is arranged on the diameter-increased part 32d of the main shaft 30d, and the relief part 33d is formed on the main shaft 30d adjacent to the diameter-increased part 32d. When the convex part 21d of the shackle part 20d is separated from the lock slot 31d of the main shaft 30d, the convex part 21d of the shackle part 20d is located within the range of the relief part 33d and does not contact the main shaft 30d, and the relief part 33d is formed on the main shaft 30d to form a relief structure with the convex part 21d of the shackle part 20d.

[0308] One end of the lock slot 31d is provided with a stop block 311d for limiting the sliding range of the shackle part 20d, preventing the shackle part 20d from completely sliding out of the base 10d and affecting the normal use of the shackle part 20d.

[0309] The side wall of the sliding groove 11d is provided with a first limiting structure 12d, and the padlock piece 20d is provided with a second limiting structure 22d. The cooperation of the first limiting structure 12d and the second limiting structure 22d limits the sliding of the padlock piece 20d when the padlock piece 20d and the main shaft 30d are in a separated state. Specifically, when the padlock piece 20d slides downward and the convex part 21d is separated from the lock groove 31d, the first limiting structure 12d and the second limiting structure 22d cooperate to limit the separation of the convex part 21d and the lock groove 31d, so that the padlock piece 20d can stably maintain the separated state and prevent the padlock piece 20d from sliding out and affecting the rotating movement of the main shaft 30d in an unexpected situation. In the embodiment, the first limiting structure 12d and the second limiting structure 22d are a set of convex parts and grooves that can limit each other. In other embodiments, the first limiting structure 12d and the second limiting structure 22d can also be a cooperating limiting structure including an elastic top bead.

[0310] In the specific embodiment, the side wall of the sliding groove 11d is provided with a groove 12d as the first limiting structure 12d, and the padlock piece 20d is provided with a padlock convex part 22d as the second limiting structure 22d, which can be limited by the groove 12d. The lower part of the padlock piece 20d is provided with a slot 24d, so that the lower part of the padlock piece 20d is divided into two legs, and the padlock convex part 22d is arranged on one of the legs. The padlock piece 20d is more easily deformed elastically at the leg, so that the padlock convex part 22d is more easily inserted into the groove 12d, and the operation is more convenient.

[0311] The isolator of the present disclosure comprises the operating mechanism as described above.

[0312] In the embodiment, the padlock piece 20d is provided with a long slot 25d with a semicircular cross section at the root of the leg where the padlock convex part 22d is located, which further increases the elasticity of the leg, so that the operation is more convenient.

[0313] Switching apparatus is a kind of mechanical switching device, which can conduct, carry and break normal current, including circuit breaker, contactor, disconnecting switch and the like. Switching apparatus has a switching unit including a moving contact and a stationary contact, and the switching unit is switched on / off by the moving contact and the stationary contact to achieve the conduction, carrying and breaking of normal current. There is an arc in the process of switching from the on state to the off state of the moving contact and the stationary contact, and the existence of the arc makes it difficult for the moving contact and the stationary contact to cut off the electrical connection in time, resulting in incomplete breaking of normal current or too long response time of the switching apparatus. There is a switching unit with an arc separation structure in the prior art, the arc separation structure is indirectly linked with the moving contact, and as the moving contact moves away from the stationary contact, the arc separation structure moves from the avoidance position to the arc separation position synchronously, i.e. the arc separation structure gradually enters between the moving contact and the stationary contact in the process of separation to form a solid isolation barrier between the moving contact and the stationary contact, thereby separating the arc to achieve the effect of arc extinguishing. However, the arc separation structure must have a gap between the moving contact and the stationary contact to enter between the moving contact and the stationary contact to start cutting the arc and separating the arc, and for products with high arc extinguishing performance requirements, the existing arc separation structure is difficult to meet the requirements.

[0314] The present disclosure also provides a moving contact assembly, a switching unit and a switching apparatus, which shorten the arc extinguishing time of the switching unit by changing the structure of the moving contact assembly, and improve the arc extinguishing performance of the switching apparatus.

[0315] The technical solution of the present disclosure includes:

[0316] A moving contact assembly includes a moving contact configured to form on / off cooperation with a stationary contact, and further includes a yielding structure, which is arranged on a side of the moving contact assembly for moving towards an arc separation structure and is located on a movement track of the arc separation structure, so as to form a preliminary yielding for the arc separation structure.

[0317] In one embodiment, the preliminary yielding is configured to enable the arc separation structure to shorten the time of switching from the avoidance position to the arc separation position.

[0318] In one embodiment, the yielding structure is formed by a notch arranged at the edge of the moving contact assembly.

[0319] In one embodiment, it further includes an arc guiding piece, the arc guiding piece has an arc guiding plate arranged on one side of the moving contact, the notch includes a first notch arranged on the moving contact, and a second notch arranged on the arc guiding plate, and the first notch and the second notch coincide in the direction of the relative position of the moving contact and the arc guiding plate.

[0320] In one embodiment, one side of the moving contact is a contact surface for the static contact to pass through, the moving contact is provided with at least one guide surface in the plane where the contact surface is located, the at least one guide surface is used to form a movement guide for the moving contact to relatively approach the static contact, and the gap comprises a first gap provided in the moving contact, the first gap is provided at the guide surface for the movement guide.

[0321] In one embodiment, the gap is a rectangular, triangular or semicircular structure provided in the middle of the edge.

[0322] The technical solution of the present disclosure also includes:

[0323] A switch unit comprising the moving contact assembly described above, the moving contact assembly is provided on a contact support, further comprising a static contact and an arc separation structure connected to the contact support, the moving contact of the moving contact assembly is driven by the contact support to form an on / off cooperation with the static contact, the arc separation structure is switched between the avoidance position and the arc separation position under the driving of the contact support, when the arc separation structure is in the avoidance position, the accommodation structure of the moving contact assembly is located on the movement track of the arc separation structure from the avoidance position to the arc separation position, and the end of the arc separation structure is located at the accommodation structure, thereby forming the preliminary accommodation.

[0324] In one embodiment, the static contact is fixedly provided on a fixed seat, the contact support is a rotating disc connected to the fixed seat, the arc separation structure is formed on an arc separation piece connected to the fixed seat, the arc separation piece is switched between the avoidance position and the arc separation position under the rotation of the rotating disc, and the accommodation structure is provided on one side in the rotating direction of the moving contact assembly.

[0325] In one embodiment, the rotating disc comprises a rotating shaft part, the rotating shaft part is a cylinder with a recess structure on the outer side, the recess structure is rotated to a position opposite to the static contact when the arc separation structure moves from the avoidance position to the arc separation position, thereby forming the movement accommodation for the arc separation structure.

[0326] The technical solution of the present disclosure also includes:

[0327] A switch device comprising the switch unit described above.

[0328] In one embodiment, the switch device is a disconnector or a circuit breaker.

[0329] The present disclosure has the following beneficial effects:

[0330] 1. The present disclosure provides a switch unit for a switch device, comprising a moving contact assembly, a stationary contact assembly and a contact support, the moving contact assembly is arranged on the contact support and moves with the contact support to connect with or disconnect from the stationary contact assembly. The moving contact assembly comprises a moving contact head and a moving contact support, the moving contact head is arranged on the moving contact support and moves with the moving contact support to connect with or disconnect from the stationary contact head. The moving contact support comprises a rotating shaft part and a moving contact part, the rotating shaft part is arranged on the contact support and rotates with the contact support, the moving contact part is arranged on the rotating shaft part and moves with the rotating shaft part to connect with or disconnect from the stationary contact head. The moving contact part comprises a moving contact head and a moving contact guiding surface, the moving contact head is arranged on the moving contact guiding surface and moves with the moving contact guiding surface to connect with or disconnect from the stationary contact head. The moving contact guiding surface is arranged on the moving contact part and guides the stationary contact head to connect with or disconnect from the moving contact head. The moving contact guiding surface comprises a first gap, the first gap is arranged on the moving contact guiding surface and does not affect the contact area of the moving contact head and the stationary contact head, so as to improve the arc extinguishing performance of the switch device.

[0331] 2. The first gap is arranged on the moving contact guiding surface, the moving contact guiding surface is arranged to guide the stationary contact head to connect with or disconnect from the moving contact head, the gap arranged on the moving contact guiding surface does not affect the contact area of the moving contact head and the stationary contact head, so as to improve the arc extinguishing performance of the switch device.

[0332] 3. The recess structure arranged on the rotating shaft part makes the distance between the rotating shaft part and the stationary contact head larger, so as to form a movement gap for the arc separation structure and prevent the arc separation structure from interfering with the stationary contact head during movement.

[0333] The specific embodiments of the present disclosure are described below in conjunction with the accompanying drawings.

[0334] Referring to FIGS. 49-55, the present disclosure provides a switch unit for a switch device, comprising a moving contact assembly 1e, a stationary contact assembly 2e and a contact support 3e, the moving contact assembly 1e is arranged on the contact support 3e and moves with the contact support 3e to connect with or disconnect from the stationary contact assembly 2e. The moving contact assembly 1e comprises a moving contact head 11e for connecting with or disconnecting from the stationary contact head 21e of the stationary contact assembly 2e. The contact support 3e is a rotating disc part rotatably connected to a fixed seat 5e, comprising a rotating shaft part 31e, the moving contact assembly 1e is arranged in the mounting hole 311e of the rotating shaft part 31e, and the two ends of the moving contact head 11e extend out of the rotating shaft part 31e to form two moving contact parts 10e on the two sides of the rotating shaft part 31e in the radial direction. The stationary contact assembly 2e has two groups, and the two stationary contact heads 21e of the two groups of stationary contact assemblies 2e correspond to the two moving contact parts 10e respectively. The moving contact assembly 1e rotates with the rotating shaft part 31e to make the moving contact head 11e connect with or disconnect from the stationary contact head 21e, more specifically, the two moving contact parts 10e respectively connect with or disconnect from the two stationary contact heads 21e.

[0335] The moving contact 11e is two, the two moving contacts 11e are oppositely arranged, the direction of any moving contact 11e to the other moving contact 11e is defined as the inner, and the direction away from it is defined as the outer, the space between the inner sides of the two moving contacts 11e is used for the static contact part 20e of the static contact 21e to pass through, so that the moving contact part 10e and the static contact part 20e form an electrical connection, that is, the moving contact 11e and the static contact 21e are conductive. The inner side of the moving contact 11e is provided with a top abutting bump 111e, the top abutting bumps 111e of the two moving contacts 11e abut to limit the minimum distance between the inner sides of the two moving contacts 11e, and the arc guiding piece 12e includes two arc guiding plate parts 121e respectively arranged on the outer sides of the two moving contacts 11e and an arc guiding connecting part 122e connecting the two arc guiding plate parts 121e. The arc guiding piece 12e can guide the arc generated when the moving contact 11e and the static contact 21e are disconnected to the side away from the static contact 21e, thereby reducing the arc and helping the arc to extinguish as soon as possible. The arc guiding piece 12e is made of conductive material and therefore has a certain rigidity, and the two arc guiding plate parts 121e are respectively arranged on the outer sides of the moving contacts 11e to provide rigid support for the moving contacts 11e, so that the arc guiding piece 12e has a supporting function. The arc guiding connecting part 122e connects the two arc guiding plate parts 121e to limit the outer sides of the two moving contacts 11e, so that the top abutting bumps 111e of the two moving contacts 11e abut, which is conducive to the reliable conduction of the moving contact 11e and the static contact 21e.

[0336] The moving contact assembly 1e further includes a reed 14e arranged on the outer side of the arc guiding plate part 121e, the moving contact assembly 1e passes through the mounting hole 311e of the rotating shaft part 31e, and the reed 14e is in abutting cooperation with the mounting hole 311e to limit the moving contacts 11e in the inner and outer directions. The two ends of the reed 14e correspond to the two ends of the moving contact 11e, that is, correspond to the moving contact part 10e of the moving contact assembly 1e, so that the reed 14e applies elastic pressure to the inner side of the moving contact 11e under the action of the hole wall of the mounting hole 311e, so that the top abutting bumps 111e of the two moving contacts 11e abut, and the reliable conduction of the moving contact 11e and the static contact 21e is further ensured. The two ends of the reed 14e are respectively provided with a limiting groove 141e, the end of the limiting groove 141e is located at the end of the reed 14e, the arc guiding plate part 121e of the arc guiding piece 12e is provided with a limiting bump 123e corresponding to the limiting groove 141e, and the two sides of the limiting groove 141e and the limiting bump 123e cooperate to limit the reed 14e. In order to further ensure the stable connection of the moving contact assembly 1e before it is inserted and mounted into the mounting hole 311e, the moving contact assembly 1e further includes a U-shaped connecting piece 15e, which is a U-shaped rod structure and is arranged opposite to the arc guiding connecting part 122e of the arc guiding piece 12e. The U-shaped connecting piece 15e is arranged on the outer sides of the two reeds 14e to limit and fix the moving contact assembly 1e on the outer side.

[0337] Referring to Figs. 49, 53-55, the switch unit further comprises an arc separation structure 40e formed on an arc separation member 4e rotatably arranged on a fixed seat 5e, and the rotating shaft part 31e is connected with the arc separation member 4e through a gear transmission mechanism, which comprises a first transmission tooth structure (not shown in the figure) arranged on the arc separation member 4e and a second transmission tooth structure 32e arranged on the outside of the rotating shaft part 31e, so that the arc separation member 4e is rotated relative to the fixed seat 5e under the driving of the rotating shaft part 31e, realizing the switching of the arc separation structure 40e from the avoiding position to the arc separation position, and entering between the gradually separated moving contact 11e and the stationary contact 21e in the process of switching, so that the arc separation structure 40e selectively acts as a solid isolation barrier to cut off the arc generated in the separation process of the moving contact 11e and the stationary contact 21e and form a solid isolation barrier between the moving contact 11e and the stationary contact 21e, which can effectively cut off the arc and prevent the arc from reigniting. The avoiding position refers to the position of the arc separation structure 40e when the moving contact 11e is in the conducting position, at which time the arc separation structure 40e is located on one side of the moving contact 11e and the stationary contact 21e, so that the moving contact 11e and the stationary contact 21e can be reliably contacted to form conduction. The arc separation position refers to the position of the arc separation structure 40e when the moving contact 11e is in the separation position, at which time the arc separation structure 40e is located between the separated moving contact 11e and stationary contact 21e, forming a solid isolation barrier and increasing the creepage distance between the moving contact 11e and the stationary contact 21e. The arc separation member 4e of the present embodiment is a cover-shaped structure, and the arc separation structure 40e is an arc-shaped plate structure on the arc separation member 4e, which rotates with the rotation of the contact support 3e, thereby forming a half-enclosure for the stationary contact 21e when the moving contact 11e and the stationary contact 21e are separated, and separating the stationary contact 21e from the moving contact 11e when the arc separation structure 40e moves between the stationary contact 21e and the moving contact 11e. In other embodiments, the arc separation member 4e can also have other structures, as long as the arc separation structure 40e can enter between the moving contact and the stationary contact to form a solid isolation barrier when the moving contact and the stationary contact are separated.

[0338] The arc drawing member 12e moves synchronously with the moving contact 11e, so when the moving contact 11e moves towards the separation direction, the arc drawing member 12e also synchronously moves away from the stationary contact 21e, thereby drawing the arc away from the stationary contact 21e and towards the arc extinguishing chamber (not shown in the figure), and then cutting off the arc by the arc separation structure 40e. As can be seen, the arc drawing member 12e can draw the arc towards the arc extinguishing chamber, which can reduce the difficulty of cutting off the arc by the arc separation structure 40e, shorten the time for the arc to be cut off and extinguished, i.e. shorten the arc extinguishing time of the switch unit, and improve the arc extinguishing performance of the switch device.

[0339] The linkage between the contact support 3e and the arc separation piece 4e in the above embodiment is formed by a gear transmission mechanism, and in other embodiments, the linkage between the contact support 3e and the arc separation piece 4e can also be formed by a pushing portion and an elastic reset member. The pushing portion is arranged on the contact support 3e to push the arc separation piece to move unidirectionally between the avoidance position and the arc separation position. The elastic reset member, more specifically a torsion spring arranged on the rotating shaft of the arc separation piece 4e, is used to push the arc separation piece to reset. For example, the pushing portion of the contact support pushes the arc separation piece to switch from the avoidance position to the arc separation position, and the elastic reset member is used to drive the arc separation piece to reset from the arc separation position to the avoidance position, and vice versa.

[0340] Referring to Figs. 53-55, the movable contact assembly 1e is provided with a let- go structure 13e arranged on the side of the movable contact assembly 1e facing the arc- shielding structure 40e and located on the movement track of the arc- shielding structure 40e for forming a preliminary let- go for the arc- shielding structure 40e. More specifically, when the movable contact assembly 1e is installed on the contact support 3e and arranged on the fixed seat 5e, the let- go structure 13e is on the side of the movable contact assembly 1e facing the arc- shielding structure 40e, and when the arc- shielding structure 40e is in the let- go position and the movable contact assembly 1e is in the conducting position, the let- go structure 13e is located on the movement track of the arc- shielding structure 40e, so that the end of the arc- shielding structure 40e can be arranged at the let- go structure 13e, and the let- go structure 13e forms a preliminary let- go for the arc- shielding structure 40e. The preliminary let- go described in the disclosure refers to when the arc- shielding structure 40e is in the let- go position, the end of the arc- shielding structure 40e is closer to the switching position by means of the let- go structure 13e, i.e. closer to the contact point between the movable contact 11e and the static contact 21e, so that the arc- shielding structure 40e can enter between the movable contact 11e and the static contact 21e earlier, thereby forming a physical isolation barrier between the movable contact 11e and the static contact 21e earlier, and shortening the time from the let- go position to the arc- shielding position of the arc- shielding structure 40e. The contact point between the movable contact 11e and the static contact 21e refers to the position where the movable contact 11e and the static contact 21e form electrical contact when the movable contact 11e and the static contact 21e are in conduction, which is not limited to a point or a region. More specifically, referring to Figs. 50-52, the let- go structure 13e is formed by a notch arranged on the edge of the movable contact assembly 1e. In one embodiment, the notch forming the let- go structure 13e is a first notch 112e arranged on the movable contact 11e, and the first notch 112e is located on the side of the movable contact 11e facing the arc- shielding structure 40e. Referring to Fig. 56, in another embodiment, the notch forming the let- go structure 13e includes a first notch 112e arranged on the movable contact 11e and a second notch 1211e arranged on the arc- plate part 121e of the arc- guiding structure 12e, and the first notch 112e and the second notch 1211e coincide in the direction of the relative position of the movable contact 11e and the arc- plate part 121e, i.e. in the inner-outer direction. The presence of the second notch 1211e enables the arc- plate part 121e to have a larger width, and the second notch 1211e is only arranged at the position corresponding to the first notch 112e, so that the area of the arc- plate part 121e is larger and the arc- guiding effect is better.

[0341] Because the moving contact assembly 1e has the gap forming the accommodation structure 13e, the end of the arc separation structure 40e can be closer to the contact point between the moving contact 11e and the stationary contact 21e when the moving and stationary contacts are in conduction, and the arc separation structure 40e is indirectly linked with the moving contact 11e through the contact support 3e, i.e. the two are synchronous. When the moving contact 11e moves away from the stationary contact 21e, the arc separation structure 40e can enter the moving contact 11e and the stationary contact 21e earlier to start cutting the arc through the accommodation structure 13e, i.e. to form a physical isolation barrier between the moving contact 11e and the stationary contact 21e earlier, to reduce the arc burning time, shorten the arc extinguishing time of the switch unit, and improve the arc extinguishing performance of the switch device.

[0342] Referring to FIGS. 51 and 52, the inner side surface of the moving contact 11e is a contact surface for the conduction of the stationary contact 21e, and the moving contact 11e is provided with two guide surfaces 113e on the plane where the contact surface is located, and the two guide surfaces 113e are respectively arranged on the two sides of the moving contact 11e. The guide surface 113e is used to form a movement guide for the relative approaching movement of the moving contact 11e and the stationary contact 21e, so that the stationary contact 21e can more smoothly enter between the two moving contacts 11e. The guide surface 113e of the embodiment is a bevel surface, and in other embodiments, the guide surface can also be a curved surface. In the working process, only the guide surface 113e close to the stationary contact 21e plays a role in movement guide, and the other guide surface 113e can make the moving contact 11e form a movement balance. The first gap 112e is arranged at the guide surface 113e for movement guide. Because the guide surface 113e is used for movement guide, the moving contact 11e does not rely on the guide surface 113e to form an electrical connection with the stationary contact 21e, and therefore the arrangement of the first gap 112e at the guide surface 113e will not reduce the conductive area of the moving contact 11e. The first gap 112e is arranged only on the guide surface 113e on one side of the moving contact 11e, and the guide surface 113e is a symmetrical structure on the moving contact 11e, so the first gap 112e plays a role in preventing the moving contact assembly 1e from being installed reversely during the installation of the moving contact assembly 1e.

[0343] The notch is a rectangular, triangular or semicircular structure arranged in the middle of the edge. In the above embodiment, the first notch 112e and the second notch 1211e are rectangular structures, which are convenient for molding, arranged in the edge in the rotating direction of the movable contact assembly 1e and in the middle in the radial direction of the movable contact assembly 1e, so the notch is a certain distance from the radial end of the movable contact assembly 1e. In order to ensure that the movable contact 11e and the static contact 21e have a large enough contact area, the movable and static contacts extend a certain length towards each other, so when the arc separation structure 40e is in the avoiding position, the end of the arc separation structure 40e corresponds to the middle of the movable contact assembly 1e in the radial direction. Arranging the notch in the middle of the movable contact assembly 1e has less impact on the volume of the movable contact 11e than extending the notch to the end of the movable contact assembly 1e, maintains good electrical performance of the movable contact 11e, and is conducive to conducting large current.

[0344] The movable contact 11e in the above embodiment is two, and the inner side of the two movable contacts 11e forms the contact surface for conducting with the static contact. In other embodiments, the movable contact 11e can be one, and correspondingly, one side of the movable contact 11e forms the contact surface, and the arc leading plate part 121e of the arc leading piece 12e is arranged on the side of the movable contact 11e opposite to the contact surface.

[0345] Referring to FIGS. 49, 53-55, the rotating shaft part 31e is a cylindrical shape with a recess structure 312e arranged on the outer side, and the recess structure 312e rotates to the position opposite to the static contact 21e when the arc separation structure 40e moves from the avoiding position to the arc separation position, thereby increasing the distance between the rotating shaft part 31e and the static contact 21e, forming a movement avoiding position for the arc separation structure 40e, and preventing the arc separation structure 40e and the static contact 21e from interfering with each other. If the rotating shaft part 31e does not have the recess structure 312e but has a complete annular surface structure on the outer side, in order to prevent the arc separation structure 40e and the static contact 21e from interfering with each other, the outer diameter of the rotating shaft part 31e must be made smaller or the static contact 21e must be arranged farther from the movable contact 11e. Making the outer diameter of the rotating shaft part 31e smaller is not conducive to the stable installation of the movable contact assembly 1e and is not conducive to the strength of the rotating shaft part 31e, and arranging the static contact 21e farther from the movable contact 11e will reduce the contact area of the movable and static contacts, i.e., reduce the current carrying capacity of the switchgear with the switch unit. Therefore, the presence of the recess structure can also ensure the electrical performance of the switchgear and meet the demand for large current on-off.

[0346] In the above embodiment, the movable contact assembly 1e is arranged on the contact support 3e, and is driven to rotate by the contact support 3e to make the movable contact 11e and the stationary contact 21e on and off, and the movable contact assembly 1e is also indirectly linked with the arc separation structure 40e through the contact support 3e. In other embodiments, the movable contact assembly 1e can also make other movements to realize the on and off of the movable and stationary contacts, such as linear translation; accordingly, the movable contact assembly 1e can also be linked with the arc separation structure 40e through other linear translation movement mechanisms, such as the linear translation movement mechanism being provided with a rack structure, the arc separation cover being provided with a gear structure, and the two being linked through the gear and rack to make the movable contact assembly 1e linked with the arc separation structure 40e.

[0347] Referring to FIGS. 53-55, the contact support 3e is rotationally connected to the fixed seat 5e, so that the movable contact assembly 1e is in a relative movement connection with the fixed seat 5e. The arc separation piece 4e is also rotationally connected to the fixed seat 5e, and the movable contact assembly 1e and the arc separation piece 4e are indirectly linked through the contact support 3e. The stationary contact assembly 2e is fixedly installed on the fixed seat 5e, and each stationary contact assembly 2e includes a stationary contact 21e, and the stationary contact 21e has a stationary contact portion 20e at the end thereof for electrically connecting with the movable contact portion 10e of the movable contact assembly 1e. In other embodiments, the movable contact portion 10e and the stationary contact portion 20e are not limited to two groups, and it is also feasible to arrange one movable contact portion 10e and one stationary contact portion 20e to form a group of contacts; accordingly, it is also feasible to arrange two or more movable contact portions 10e and two or more stationary contact portions 20e to form two or more groups of contacts.

[0348] In one embodiment, the switch device having the above contact system is a disconnector, and in other embodiments, the switch device can also be a circuit breaker.

[0349] Disconnectors are used to open or close a circuit and have the function of fast opening or closing to minimize the effect of arc. This switching device is usually configured to be operated by an operator manually or by other tools to operate the operating lever to operate the moving contact to open or engage the static contact through a series of linked components. The disconnector can isolate the non-live part from the live part when it is open, and create an obvious open point to isolate the faulty equipment or the equipment under maintenance. When the electrical equipment is under maintenance, the equipment under maintenance is isolated from the power supply to prevent safety accidents. Disconnectors are widely used in power distribution systems and automation systems of construction, power, petrochemical and other industries. Common rotary disconnectors include an operating mechanism and a contact system, the contact system including a moving contact and a static contact. The operating mechanism of the disconnector drives the moving contact to move through the movement of the rotating element, so as to disconnect or engage the static contact. The operating mechanism of the disconnector and the contact system are usually connected in transmission through a transmission member. At present, the transmission member structure of the disconnector is complex, and a plurality of types of transmission members are required to realize the transmission connection between the operating mechanism and the contact system and the transmission connection between the contact systems. In addition, the unreasonable structure design of the transmission system of the disconnector also causes certain safety hazards.

[0350] Therefore, the disclosure also provides a switch device, which is a rotary switch structure, including an operating mechanism and a contact mechanism, the contact mechanism including a contact rotating shaft member connecting contacts, the operating mechanism including a driving rotating member for driving the contact rotating shaft member, and a transmission member, the transmission member including a first end face and a second end face facing away from each other, the first end face of the transmission member being provided with a first transmission structure protruding outward, the second end face of the transmission member being provided with a second transmission structure protruding outward symmetrically with the first transmission structure, the driving rotating member being provided with a third transmission structure recessed inward corresponding to the first transmission structure or the second transmission structure of the transmission member, and the contact rotating shaft member being provided with a fourth transmission structure recessed inward corresponding to the first transmission structure or the second transmission structure of the transmission member; wherein the contact rotating shaft member and the driving rotating member are connected in transmission through the transmission member in one of the following modes: A. the transmission connection between the first transmission structure of the transmission member and the third transmission structure of the driving rotating member and the transmission connection between the second transmission structure of the transmission member and the fourth transmission structure of the contact rotating shaft member, and B. the transmission connection between the second transmission structure of the transmission member and the third transmission structure of the driving rotating member and the transmission connection between the first transmission structure of the transmission member and the fourth transmission structure of the contact rotating shaft member.

[0351] The disclosure also proposes a switch device, which is a rotary switch structure, and is a multi-stage switch device, comprising an operating mechanism and a plurality of contact mechanisms, each of the contact mechanisms comprising a contact shaft member connecting contact heads, the operating mechanism comprising a driving rotary member for driving the contact shaft member, and further comprising a plurality of transmission members, each of the transmission members comprising a first end face and a second end face facing away from each other, the first end face of the transmission member being provided with a first transmission structure protruding outward, the second end face of the transmission member being provided with a second transmission structure protruding outward and symmetrical to the first transmission structure, the driving rotary member being provided with a third transmission structure recessed inward corresponding to the first transmission structure or the second transmission structure of the transmission member, and the contact shaft member being provided with a fourth transmission structure recessed inward corresponding to the first transmission structure or the second transmission structure of the transmission member; wherein the contact shaft member and the driving rotary member are connected in transmission by the transmission member in one of the following modes: A. the transmission member is connected in transmission with the third transmission structure of the driving rotary member through the first transmission structure, and is connected in transmission with the fourth transmission structure of the contact shaft member through the second transmission structure; B. the transmission member is connected in transmission with the third transmission structure of the driving rotary member through the second transmission structure, and is connected in transmission with the fourth transmission structure of the contact shaft member through the first transmission structure; and wherein the contact mechanisms are connected in stages through the following mode: C. the transmission member is connected in transmission with the fourth transmission structure of each of the two adjacent contact shaft members through the first transmission structure and the second transmission structure, respectively.

[0352] In one embodiment, the transmission member is intermittently connected in transmission with the driving rotary member through the first transmission structure or the second transmission structure.

[0353] In one embodiment, the first transmission structure is a first protruding column provided on the first end face of the transmission member, and the second transmission structure is a second protruding column provided on the second end face of the transmission member; an end face of the driving rotary member is provided with an arc-shaped shaft hole, and a transmission stroke gap exists between the arc-shaped shaft hole and the first protruding column or the second protruding column, so as to realize intermittent transmission connection between the driving rotary member and the transmission member.

[0354] In one embodiment, the contact mechanism further comprises a contact assembly, the contact shaft member is used to actuate the contact assembly to realize opening and closing, the driving rotary member comprises a linkage member, and the operating mechanism further comprises a base, the linkage member is rotatably arranged in the base, the linkage member is connected in transmission with the contact shaft member through the transmission member, the rotation of the linkage member drives the rotation of the contact shaft member, and the rotation of the contact shaft member can actuate the contact mechanism of the switch device to realize opening and closing.

[0355] In one embodiment, the active rotating member further comprises a first gear, the operating mechanism further comprises a main shaft and a second gear, the first gear and the second gear are in mesh transmission with each other, the second gear is coaxially connected to one end of the main shaft, and the first gear and the linkage member are connected with each other and rotate synchronously.

[0356] In one embodiment, the first transmission structure is a first protruding column arranged on the first end surface of the transmission member, the second transmission structure is a second protruding column arranged on the second end surface of the transmission member, the end surface of the first gear is provided with an arc-shaped shaft hole, and there is a transmission stroke gap between the arc-shaped shaft hole of the first gear and the first protruding column or the second protruding column, so as to realize intermittent transmission connection between the linkage member and the transmission member; and / or

[0357] The axis of the first gear and the axis of the second gear are perpendicular to each other.

[0358] In one embodiment, the operating mechanism further comprises a main shaft, the main shaft is in transmission connection with the linkage member and can drive the linkage member to rotate, the main shaft comprises a first shaft section and a second shaft section, and the first shaft section and the second shaft section are in intermittent transmission connection.

[0359] In one embodiment, one end of the first shaft section is provided with a fifth transmission structure, one end of the second shaft section is provided with a sixth transmission structure, the fifth transmission structure and the sixth transmission structure are a set of shafts provided with key teeth and shaft holes provided with key grooves which can cooperate with each other in transmission, and the central angle corresponding to the key groove is greater than the central angle corresponding to the key tooth, so as to realize intermittent transmission connection between the first shaft section and the second shaft section.

[0360] In one embodiment, the switch electric appliance comprises an operating mechanism and two contact mechanisms, the operating mechanism is in transmission connection with the contact mechanisms through the transmission member;

[0361] The operating mechanism is located between the two contact mechanisms; or

[0362] The operating mechanism is located on one side of the two contact mechanisms arranged side by side, and the two contact mechanisms arranged side by side are in transmission connection through the transmission member.

[0363] The technical scheme provided by the present disclosure has the following technical effects:

[0364] 1. The switchgear provided by the present disclosure comprises a transmission member, a first end surface of the transmission member is provided with a first transmission structure protruding outward, a second end surface of the transmission member is provided with a second transmission structure protruding outward which is symmetrical to the first transmission structure, the first transmission structure and the second transmission structure can be used for transmission connection with the contact shaft member and the driving rotating member, and transmission connection between adjacent contact shaft members, without the need to replace or add parts, the manufacturing cost is low, and splicing is more convenient.

[0365] 2. The switchgear operating mechanism of the present disclosure, the linkage member is intermittently transmission connected with the transmission member, which can improve the operation feeling, accelerate the contact separation speed, and improve the contact service life. The main shaft comprises a first shaft section and a second shaft section, the first shaft section and the second shaft section are intermittently transmission connected, which can further improve the operation feeling, accelerate the contact separation speed, and improve the contact service life.

[0366] 3. The first transmission structure and the second transmission structure are provided as outward protruding structures, so that the third transmission structure and the fourth transmission structure matched therewith are provided as inward recessed structures, so that when the third transmission structure of the driving rotating member is exposed without external connection, the rotation thereof will not cause injury to the operator, and the safety is improved.

[0367] The present disclosure will be further described in conjunction with the drawings and specific embodiments.

[0368] Switchgear embodiment 1

[0369] Referring to FIGS. 57-71, the present embodiment provides a switchgear, the switchgear is a rotary switch structure, the switchgear can be a disconnecting switch or a circuit breaker, in the present embodiment, the switchgear is a disconnecting switch. In particular, referring to FIG. 69, the switchgear comprises a disconnecting switch operating mechanism 1f, a contact mechanism 2f, and a transmission member 90f. In the present embodiment, two contact mechanisms 2f are provided, but this is not limiting, and the number of contact mechanisms 2f can be more or less. The contact mechanism 2f comprises a contact shaft member 100f and a contact assembly, the contact shaft member 100f is used to actuate the contact assembly to realize opening and closing.

[0370] The operating mechanism 1f comprises a driving rotating member for driving the contact shaft member 100f, in the present embodiment, the driving rotating member for driving the contact shaft member 100f is a linkage member 60f and a first gear 20f.

[0371] Specifically, as shown in FIGS. 57-64, the disconnecting switch operating mechanism 1f comprises a base 10f, a main shaft 70f, a first gear 20f, a second gear 80f, an energy storage element 30f, a pin shaft 40f, a connecting rod 50f, and a linkage member 60f.

[0372] The second gear 80f is coaxially connected to one end of the main shaft 70f, and the main shaft 70f is used to transmit the rotating motion, such as the rotating motion of the handle, which can actuate the contact system to realize opening and closing. Specifically, the axis of the main shaft 70f is perpendicular to the axis of the first gear 20f, the second gear 80f comprises a first bevel gear structure 81f, the first gear 20f comprises a second bevel gear structure 21f, and the bevel gear structures of the second gear 80f and the first gear 20f are matched with each other to realize vertical power transmission.

[0373] Referring to FIG. 62, the first gear 20f and the linkage member 60f are rotatably arranged in the base 10f, and the first gear 20f and the linkage member 60f are matched by the plug-in structure to realize synchronous rotation. The linkage member 60f is provided with a first cylindrical structure 61f, and the first cylindrical structure 61f is provided with a first connecting structure 611f. The first gear 20f is provided with a second cylindrical structure 22f, and the second cylindrical structure 22f is provided with a second connecting structure 221f. The first connecting structure 611f and the second connecting structure 221f are a group of cylindrical holes that can be mutually inserted and matched, thereby realizing the plug-in matching of the first gear 20f and the linkage member 60f.

[0374] In this embodiment, the first cylindrical structure 61f is provided with a butt joint cylinder 611f, and the second cylindrical structure 22f is provided with a butt joint hole 221f. The butt joint cylinder 611f can be mutually inserted and matched with the butt joint hole 221f.

[0375] The linkage member 60f is drivingly connected to the actuating mechanism of the contact system. Through the rotation of the main shaft 70f, the rotation of the linkage member 60f is realized, and the rotation of the linkage member 60f is used to actuate the contact system to realize opening and closing.

[0376] In this embodiment, the power vertical transmission is realized by taking the main shaft 70f axis perpendicular to the first gear 20f axis as an example. In other embodiments, according to the needs of the specific rotating transmission direction, the main shaft 70f axis is parallel to the first gear 20f axis, or is at a certain angle, which can also realize the transmission of power; or the main shaft 70f is directly linked to the linkage member 60f, which is also a feasible technical solution.

[0377] The energy storage element 30f can be a compression spring or a tension spring or other energy storage element such as a gas spring. The present embodiment takes the compression spring as an example for illustration. The rotation of the linkage member 60f can actuate the energy storage element 30f to store energy. In the present embodiment, the rotation of the linkage member 60f can compress the compression spring to store energy. The energy storage element 30f is sleeved on the connecting rod 50f, and the connecting rod 50f is used to guide and limit the energy storage element 30f when storing energy or releasing energy. One end of the connecting rod 50f is hinged and positioned relative to the base 10f. For example, one end of the connecting rod 50f is hinged to the base 10f by the pin shaft 40f, so that one end of the connecting rod 50f is hinged and positioned relative to the base 10f. The other end of the connecting rod 50f is provided with a sliding groove 51f, and the butt joint cylinder 611f of the linkage member 60f is sleeved in the sliding groove 51f, so that the other end of the connecting rod 50f is rotatably and slidably connected to the linkage member 60f. The energy storage element 30f is abutted against the pin shaft 40f and the first cylinder structure 61f and / or the second cylinder structure 22f at both ends, respectively. Of course, the connecting rod 50f can also guide and limit the energy storage element 30f in other ways, for example, the connecting rod 50f is provided with a guide groove, and the energy storage element 30f is guided and limited by the guide groove. In the present embodiment, the energy storage element 30f is sleeved on the connecting rod 50f, so that the connecting rod 50f guides and limits the energy storage element 30f when storing energy or releasing energy, and the structure is simpler.

[0378] Of course, in other embodiments, when the energy storage element 30f is a gas spring, the gas spring can be sleeved on the connecting rod 50f by an accessory, for example, the gas spring can be sleeved on the connecting rod 50f by an additional sleeve.

[0379] When the energy storage element 30f is a tension spring, the tension spring is arranged to have an opposite orientation to the compression spring in the present embodiment, so that the rotation of the linkage member 60f can pull the tension spring to store energy.

[0380] In other embodiments, the sliding groove 51f of the connecting rod 50f can also be arranged at the opposite end of the present solution, that is, the end of the connecting rod 50f can be hinged with the linkage member 60f, and the other end of the connecting rod 50f is arranged with the sliding groove 51f and is in sliding connection with the pin shaft 40f, which is also a feasible technical solution. However, in this solution, the end of the connecting rod 50f provided with the sliding groove 51f will be likely to protrude outward from the base 10f due to the pushing of the linkage member 60f, resulting in the base 10f needing to have a larger volume, thereby being not conducive to the miniaturization of the product. That is, compared with the rotatable and slidable connection between the connecting rod 50f and the base 10f, in the present embodiment, the connecting rod 50f and the linkage member 60f are rotatably and slidably connected, so that the pushing of the linkage member 60f causes the end of the connecting rod 50f provided with the sliding groove 51f to protrude inwardly to the linkage member 60f, so that the base 10f has a smaller volume, the product is more compact, and the present solution has a simple structure, is easy to manufacture, and can reduce costs.

[0381] In the present embodiment, two sliding sleeves 41f are sleeved on the pin shaft 40f, so that the one end of the energy storage element 30f does not directly abut against the pin shaft 40f, but the one end of the energy storage element 30f abuts against the sliding sleeve 41f, so that the energy storage element 30f has less wear on the pin shaft 40f, and the operation of the energy storage element 30f is more flexible. In other embodiments, the first cylindrical structure 61f and the second cylindrical structure 22f can be replaced by a columnar structure with a non-cylindrical outer surface, for example, a columnar structure with a polygonal outer surface. However, in the present embodiment, the cylindrical structure is used, which can further make the operation of the energy storage element 30f more flexible.

[0382] The depth of the butt joint circular hole 221f is less than the length of the butt joint cylinder 611f, so that an assembly gap is arranged between the first cylindrical structure 61f and the second cylindrical structure 22f, and the width of the assembly gap is slightly greater than the thickness of the connecting rod 50f, so that the butt joint cylinder 611f of the linkage member 60f is arranged in the sliding groove 51f; the connecting rod 50f is positioned in the gap between the first cylindrical structure 61f and the second cylindrical structure 22f in the thickness direction, which is conducive to the position stability of the connecting rod 50f and can guide the movement of the connecting rod 50f. Of course, in other embodiments, no gap is arranged between the first cylindrical structure 61f and the second cylindrical structure 22f, that is, the first cylindrical structure 61f and the second cylindrical structure 22f are tightly matched, and the first cylindrical structure 61f and / or the second cylindrical structure 22f is arranged in the sliding groove 51f, which is also a feasible technical solution.

[0383] As shown in FIG. 57, the linkage member 60f is rotated from the first position shown in the figure along the direction B, and the rotation direction of the main shaft 70f is the direction A. At this time, the first cylindrical structure 61f slides in the sliding groove 51f, and the distance between the first cylindrical structure 61f and the pin shaft 40f is shortened, so that the energy storage element 30f is compressed to store energy; as shown in FIG. 58, the rotation of the linkage member 60f makes the compression degree of the energy storage element 30f reach the maximum value, so that the energy storage element 30f stores the maximum energy, and at this time the linkage member 60f rotates to the dead point position. After reaching this position, the linkage member 60f continues to rotate along the direction B, and as shown in FIG. 59, after the linkage member 60f rotates past the dead point, the energy storage element 30f releases energy to drive the linkage member 60f to rotate rapidly, and the linkage member 60f rotates to the second position shown in FIG. 59.

[0384] As described above, since the linkage member 60f is connected in transmission with the actuating mechanism of the contact system, when the linkage member 60f rotates from the first position shown in FIG. 57 to the second position shown in FIG. 59, the contact state of the contact system is switched from the first state to the second state, for example, the contact system is switched from the open state to the closed state. At least a part of the length of the sliding groove 51f on the connecting rod 50f covers the energy storage compression stroke of the compression spring.

[0385] The energy storage element 30f and the connecting rod 50f constitute an energy storage assembly. In the embodiment, two groups of central symmetric energy storage assemblies are provided, which are matched with the two cylindrical structures of the linkage member 60f. Compared with the energy storage assembly provided with only one group, the energy storage assembly of the embodiment is provided with two groups and is centrally symmetric around the rotation axis of the linkage member 60f, so that symmetrical compression energy storage can be realized, the stress is more balanced, the friction of the main shaft 70f on the base 10f is reduced, the part wear is smaller, and the product service life can be significantly prolonged.

[0386] The first bevel gear structure 81f of the second gear 80f is a sector bevel gear structure, and the second bevel gear structure 21f of the first gear 20f is a sector bevel gear structure, so that the machining of the parts is simpler and the material is less, and at the same time it is beneficial to fully utilize the installation space of the base 10f, and the product miniaturization is improved.

[0387] The outer end of the sliding groove 51f is defined as the end away from the center of the connecting rod 50f, and the sliding groove 51f of the connecting rod 50f can serve as a limiting structure to limit the rotation of the linkage member 60f. For example, when the linkage member 60f is in the first position as shown in FIG. 57 or the second position as shown in FIG. 59, the cylindrical structure of the linkage member 60f is at the outer end of the sliding groove 51f, so that the sliding groove 51f limits the maximum rotation angle of the linkage member 60f. Of course, in other embodiments, the sliding groove 51f does not serve as a limiting structure, and when the linkage member 60f is in the first position as shown in FIG. 57 or the second position as shown in FIG. 59, the cylindrical structure of the linkage member 60f does not reach the outer end of the sliding groove 51f, and the rotation of the linkage member 60f is limited by other structures, which is also a feasible solution. For example, the two cylindrical structures of the linkage member 60f are respectively located at the ends of the sector bevel gear structure of the second bevel gear structure 21f, and the two cylindrical structures of the linkage member 60f serve as limiting mechanisms for the meshing ends of the bevel gear structure of the second gear 80f and the first gear 20f, thereby limiting the rotation of the linkage member 60f.

[0388] Referring to FIGS. 65-66, the linkage member 60f of the operating mechanism 1f is drivingly connected to the contact shaft member 100f through a transmission member 90f, and the contact shaft member 100f is used to actuate the contact assembly to achieve opening and closing.

[0389] The linkage member 60f and the transmission member 90f are intermittently drivingly connected. Specifically, the transmission member 90f includes first and second end faces that are opposite to each other, the first end face of the transmission member 90f is provided with an outwardly protruding first transmission structure 91f, the second end face of the transmission member 90f is provided with an outwardly protruding second transmission structure 92f that is symmetrical to the first transmission structure 91f, the end face of the linkage member 60f is provided with an inwardly recessed third transmission structure 61f, and the end face of the contact shaft member 100f is provided with an inwardly recessed fourth transmission structure 101f. The first transmission structure 91f and the third transmission structure 61f are a set of shaft holes and protruding shafts that can drivingly cooperate with each other, and there is a transmission stroke gap S between the shaft hole and the protruding shaft, as shown in FIG. 65, thereby achieving intermittent driving connection between the linkage member 60f and the transmission member 90f. Of course, in other embodiments, intermittent driving connection between the linkage member 60f and the transmission member 90f can also be achieved by other means, for example, by a controlled clutch mechanism.

[0390] In this embodiment, the end face of the transmission member 90f is provided with a first protruding column 91f as the first transmission structure, and the end face of the linkage member 60f is provided with an arc-shaped shaft hole 61f as the third transmission structure, the first protruding column 91f can slide in the arc-shaped shaft hole 61f along the transmission stroke gap S, thereby achieving intermittent driving connection between the linkage member 60f and the transmission member 90f.

[0391] The second transmission structure 92f and the fourth transmission structure 101f are a set of shaft holes and convex shafts capable of cooperating with each other to transmit power. In the embodiment, the second end surface of the transmission member 90f is provided with a second convex column 92f as a second transmission structure, and the contact rotating shaft member 100f is provided with a rotating shaft hole 101f matched with the second convex column 92f, so as to realize the transmission connection of the transmission member 90f and the contact rotating shaft member 100f. Since the linkage member 60f is intermittently connected with the transmission member 90f, that is, in the energy storage stage of the mechanism, the linkage member 60f rotates and the transmission member 90f does not move; when the energy storage assembly rotates through the dead point and the energy storage element 30f releases the energy storage, the linkage member 60f rotates to make the first convex column 91f pass through the arc length gap of the arc-shaped shaft hole 61f, and then the linkage member 60f contacts the transmission member 90f to drive the transmission member 90f to rotate, and then drive the contact rotating shaft member 100f to realize the opening and closing of the contact assembly. In the energy storage stage of the energy storage element 30f, the linkage member 60f does not transmit the rotary motion to the transmission member 90f, and the rotation of the main shaft 70f is more relaxed; in the energy storage element 30f energy release stage, the elastic force of the energy storage element 30f and the rotation force of the main shaft 70f jointly act on the contact rotating shaft member 100f, so as to more labor-savingly realize the opening and closing of the contact assembly.

[0392] Since the first transmission structure 91f and the second transmission structure 92f are symmetrically arranged, the positions of the first transmission structure 91f and the second transmission structure 92f are interchangeable. That is, through the cooperation of the second transmission structure 92f and the third transmission structure 61f to transmit power, or through the cooperation of the first transmission structure 91f and the fourth transmission structure 101f to transmit power, the contact rotating shaft member 100f and the driving rotating member can also be connected through the transmission member 90f.

[0393] Since the first transmission structure 91f and the second transmission structure 92f are convex column structures, they are inner recess structures on the linkage member 60f and the contact rotating shaft member 100f, and when they are not externally connected, they will not cause damage to the operator during rotation, and the safety is improved.

[0394] Referring to FIG. 70, FIG. 71, the back of the first gear 20f can also be provided with a transmission structure to be intermittently connected with the transmission member 90f. The first transmission structure 91f and the second transmission structure 92f of the transmission member 90f can be used for transmission connection with the contact shaft member 100f, the linkage member 60f or the first gear 20f. In the embodiment, the first transmission structure 91f can be used for transmission connection with the first gear 20f, wherein the first gear 20f and the linkage member 60f rotate synchronously, and the transmission member 90f can be intermittently connected with the first gear 20f through the first transmission structure 91f. For example, the back of the first gear 20f can also be provided with an arc-shaped shaft hole for cooperating with the first protruding column 91f of the transmission member 90f, and the transmission member 90f can be intermittently connected with the first gear 20f through the first transmission structure 91f. In this way, the operating mechanism 1f is located between two contact mechanisms 2f, as shown in FIG. 71, and the operating mechanism 1f is connected with the left and right contact mechanisms 2f through two transmission members 90f respectively. The disconnecting switch operating mechanism 1f can be driven by the middle part to rotate the left and right contact shaft members 100f simultaneously, so as to realize simultaneous control of multiple contact mechanisms 2f. At this time, the transmission member 90f can be universal, without the need to replace or add parts, so that the manufacturing cost is low and the splicing is more convenient. Moreover, the first transmission structure 91f is a protruding column structure, so that the shaft hole structure on the first gear 20f is concave, and when it is not externally connected and exposed, its rotation will not cause damage to the operator, and the safety is improved.

[0395] Referring to FIG. 63-64, the main shaft 70f includes a first shaft segment 71f and a second shaft segment 72f, which are intermittently connected. One end of the second shaft segment 72f is connected with the first shaft segment 71f.

[0396] One end of the first shaft segment 71f is provided with a fifth transmission structure 711f, one end of the second shaft segment 72f is provided with a sixth transmission structure 721f, and the other end of the second shaft segment 72f is connected with the second gear 80f. The fifth transmission structure 711f and the sixth transmission structure 721f are a set of shafts with key teeth and shaft holes with key grooves that can cooperate with each other to transmit, and the corresponding central angle of the key groove is greater than the corresponding central angle of the key tooth, so as to realize the intermittent transmission connection between the first shaft segment 71f and the second shaft segment 72f.

[0397] In this embodiment, one end of the first shaft segment 71f is provided with a transmission shaft part 712f, the transmission shaft part 712f is provided with a key tooth 711f, and the transmission shaft part 712f provided with the key tooth 711f is a fifth transmission structure. One end of the second shaft segment 72f is provided with a transmission shaft hole 722f, the transmission shaft hole 722f is provided with a key groove 721f, and the transmission shaft hole 722f provided with the key groove 721f is a sixth transmission structure. The transmission shaft part 712f and the transmission shaft hole 722f are rotatably matched, the key tooth 711f is matched in the key groove 721f, the central angle N corresponding to the key groove 721f is greater than the central angle M corresponding to the key tooth 711f, there is a transmission gap angle K between the key groove 721f and the key tooth 711f, the transmission gap angle K is equal to the central angle N corresponding to the key groove 721f minus the central angle M corresponding to the key tooth 711f, so that the first shaft segment 71f is in contact with the second shaft segment 72f after rotating through the transmission gap angle K for transmission, then drives the second shaft segment 72f to rotate, the second shaft segment 72f drives the second gear 80f to rotate, so as to drive the first gear 20f and the linkage member 60f to rotate, and then compress the energy storage element 30f to achieve energy storage.

[0398] When the linkage member 60f rotates to the dead point position, as shown in FIG. 58, the energy storage element 30f stores energy to the maximum value. When the main shaft 70f continues to rotate, the energy storage mechanism passes through the dead point and quickly starts to release energy. Because the first shaft segment 71f and the second shaft segment 72f are intermittently connected in transmission, there is a transmission gap between the first shaft segment 71f and the second shaft segment 72f, so in the initial stage of energy release of the energy storage mechanism, the energy storage mechanism drives the second shaft segment 72f to rotate within the transmission gap angle K, and after the second shaft segment 72f rotates through the transmission gap angle K, the second shaft segment 72f drives the first shaft segment 71f to rotate, so that the energy storage mechanism can obtain a larger acceleration in the initial stage of energy release, thereby improving the initial movement speed of the actuating mechanism of the contact system, which is beneficial to realize the closing / opening of the contact system. Because in the process of manually closing / opening by the handle, the movement speed of the hand is slow relative to the millisecond-level energy release speed of the energy storage element 30f (such as a spring), if there is no transmission gap angle K between the first shaft segment 71f and the second shaft segment 72f, the hand becomes part of the resistance in the initial stage of energy release of the energy storage element 30f, and becomes the rotation of the main shaft 70f driven by the energy storage element 30f, and the rotation of the hand driven by the main shaft 70f, which is extremely poor in operation feeling, and also affects the energy release speed of the energy storage element 30f, especially when opening, which brings great harm, which slows down the contact separation speed and the arc transfer speed, aggravates the contact ablation, and in severe cases, the arc may not be broken, which causes safety risks. On the basis of the intermittent transmission connection between the linkage member 60f and the first gear 20f and the transmission member 90f, the first shaft segment 71f and the second shaft segment 72f are intermittently connected in transmission, which can further improve the operation feeling, speed up the contact separation speed, and improve the service life of the contact.

[0399] In this embodiment, the transmission gap angle K is about 25°. The number of the key teeth 711f and the key grooves 721f is 3. Of course, the number of the key teeth 711f and the key grooves 721f can be other numbers, as long as the number of the key teeth 711f and the key grooves 721f correspond.

[0400] Although the operating mechanism and the transmission member in the disconnector are taken as examples in this embodiment, the operating mechanism and the transmission member can be applied to other switch electric appliances, such as circuit breakers, as can be foreseen by those skilled in the art.

[0401] Switch electric appliance embodiment 2

[0402] Referring to FIGS. 67-69, in this embodiment, the switch electric appliance is a multi-stage switch electric appliance, i.e., the switch electric appliance comprises multiple contact mechanisms 2f and multiple transmission members 90f, and the rest is the same as in embodiment 1. In this specific embodiment, the switch electric appliance is provided with two contact mechanisms 2f, and the transmission member 90f can also be used for the connection of the adjacent contact shaft members 100f, so that the linkage member 60f can drive multiple contact shaft members 100f to rotate simultaneously, realizing simultaneous control of multiple contact mechanisms 2f. The operating mechanism 1f is located on one side of the two parallel contact mechanisms 2f; the inter-stage connection mode of the multiple contact mechanisms 2f is through the transmission connection of the first transmission structure 91f and the second transmission structure 92f of the transmission member 90f with the fourth transmission structure 101f of the adjacent two contact shaft members 100f, respectively.

[0403] The operating mechanism 1f is in transmission connection with the contact mechanism 2f through the transmission member 90f, and the two parallel contact mechanisms 2f are in transmission connection through the transmission member 90f. The fourth transmission structure 101f is a shaft hole 101f, and the shaft holes 101f of the adjacent contact shaft members 100f are connected with the first protruding column 91f and the second protruding column 92f of the transmission member 90f, respectively, so as to realize the connection transmission of the adjacent contact shaft members 100f. The first transmission structure 91f and the second transmission structure 92f of the transmission member 90f can be used for the transmission connection with the contact shaft member 100f or the linkage member 60f or the first gear 20f, or the transmission connection between the adjacent contact shaft members 100f, without the need to replace parts or new

[0404] Disconnectors can be used to manipulate the opening or closing of a circuit, and have the function of fast opening or closing to minimize the impact of arc. Such switching devices are usually configured to be operated by an operator manually or by other tools to operate a lever, for example, in the attached figure 72, by operating the handle 2 to operate the operating mechanism 1 of the disconnector, thereby operating the moving contact to open or engage the static contact through a series of linked components. The disconnector can isolate the non-live part from the live part when it is open, and cause an obvious open point to isolate the faulty equipment or the equipment under maintenance. When the electrical equipment is under maintenance, the equipment under maintenance is isolated from the power supply to prevent safety accidents. Disconnectors are widely used in power distribution systems and automation systems of construction, power, petrochemical and other industries.

[0405] In some disconnectors, a detection module is usually provided to monitor the on / off state of the main contact to confirm whether the main contact is in the expected on / off state. However, disconnectors usually have higher requirements for miniaturization; therefore, how to set the detection module in the disconnector while minimizing the impact on the volume of the disconnector and further providing a convenient design structure for maintenance or replacement of the detection module has been the pursuit of the industry.

[0406] Therefore, the disclosure also provides a kind of operating mechanism of switch device, the switch device is rotary switch structure, the operating mechanism includes base and main shaft, the main shaft is rotatably installed on the base, the main shaft is used to transmit rotary motion, the rotary motion can be actuated contact system to realize opening and closing, further include connecting piece and detection module, the connecting piece is displaceably installed on the base, the connecting piece is arranged between the main shaft and the detection module, the outer surface of the main shaft is provided with push protrusion;

[0407] The detection module includes a housing, a push rod, a moving contact, a first static contact, and a second static contact disposed in the housing, and the moving contact is movably disposed between the first static contact and the second static contact;

[0408] When the main shaft rotates, the push protrusion can push the connecting piece, so that the connecting piece produces displacement movement; the displacement movement of the connecting piece can push the push rod to produce displacement movement; the displacement movement of the push rod can act on the moving contact, so that the moving contact and the first static contact or the second static contact are switched.

[0409] In one embodiment, the detection module further comprises a common contact piece, a first static contact piece, a second static contact piece, and a dynamic contact piece, a first end of the first static contact piece is provided with the first static contact point, a first end of the second static contact piece is provided with the second static contact point; one end of the dynamic contact piece is connected to the common contact piece, so that the dynamic contact piece is cantilevered mounted, the other end of the dynamic contact piece forms a movable end, the movable end is provided with the dynamic contact point, the displacement movement of the push rod can act on the movable end of the dynamic contact piece, so that the dynamic contact point and the first static contact point or the second static contact point are switched in contact.

[0410] In one embodiment, the detection module further comprises a swing rod and a spring, the swing rod is pivotally mounted on the shell through a pivot shaft, the push rod abuts against the swing rod, and the push rod can push the swing rod to pivotally swing around the pivot shaft, a first end of the spring is connected to the swing rod, a second end of the spring is connected to the movable end of the dynamic contact piece, and the displacement movement of the push rod acts on the movable end of the dynamic contact piece through the swing rod and the spring.

[0411] In one embodiment, the active stroke range of the push rod can move the first end of the spring from the first side of the dynamic contact piece to the second side of the dynamic contact piece, the first side and the second side of the dynamic contact piece are two opposite sides; when the push rod is not pushed by the connecting piece, the movable end of the dynamic contact piece is kept in contact with the second static contact point due to the elastic force of the spring, and the dynamic contact point is kept disconnected from the first static contact point; after the push rod is pushed by the connecting piece, the push rod pushes the swing rod to pivotally swing around the pivot shaft, the swing rod drives the spring to move through the first end of the spring, and the active stroke range of the push rod can make the dynamic contact point disconnected from the second static contact point and connected to and kept in contact with the first static contact point.

[0412] In one embodiment, the swing rod is L-shaped.

[0413] In one embodiment, the swing rod is sheet-shaped, one end of the swing rod is provided with a pivot notch, and the pivot notch is fitted to the pivot shaft.

[0414] In one embodiment, one end of the common contact piece is provided with a common wiring end, a second end of the first static contact piece is provided with a normally open wiring end, a second end of the second static contact piece is provided with a normally closed wiring end, and the common wiring end, the normally open wiring end, and the normally closed wiring end are connected to detection wires through wire mounting seats.

[0415] In an embodiment, the detection module is obliquely mounted relative to the connecting piece, such that the displacement movement direction of the push rod and the displacement movement direction of the connecting piece form an angle.

[0416] In an embodiment, the connecting piece is provided with a slope, the slope abuts against the push rod, so that the displacement movement of the connecting piece is transmitted to the push rod via the slope.

[0417] In an embodiment, the outer surface of the main shaft is circumferentially provided with two push protrusions, the connecting piece and the detection module are each provided with two groups, and the two groups of the detection module and the connecting piece are symmetrically arranged.

[0418] In an embodiment, the connecting piece is further provided with a limiting groove, the base is further provided with a limiting protrusion, the limiting protrusion is fitted in the limiting groove, so as to limit the maximum travel of the connecting piece.

[0419] In an embodiment, the detection module is detachably mounted on the base; the base is provided with a base hook and a base positioning protrusion, the shell of the detection module is provided with a shell clamping protrusion and a shell positioning surface, the base hook is hookingly fitted in the shell clamping protrusion, and the base positioning protrusion abuts against the shell positioning surface, so as to realize the detachable mounting of the detection module on the base.

[0420] The technical scheme provided by the present disclosure has the following technical effects:

[0421] 1. The present disclosure provides an operating mechanism of a switch device, comprising a connecting piece and a detection module, the detection module comprising a shell, and a push rod, a common contact piece, a first static contact piece, a second static contact piece and a moving contact piece mounted in the shell, one end of the moving contact piece being connected to the common contact piece, so that the moving contact piece is cantileveredly mounted, the other end of the moving contact piece forming a movable end, the movable end being provided with a moving contact point, and the moving contact point being located between the first static contact point and the second static contact point; when the main shaft rotates, the push protrusion can push the connecting piece, so that the connecting piece produces displacement movement; the displacement movement of the connecting piece can push the push rod to produce displacement movement; the displacement movement of the push rod can act on the movable end of the moving contact piece, so that the moving contact point is switched from contacting one of the first static contact point and the second static contact point to contacting the other one, and the on / off state of the disconnecting switch can be conveniently detected.

[0422] 2. The detection module is obliquely mounted relative to the connecting piece, so that the obliquely mounted detection module can avoid each transmission structure, the appearance of the disconnecting switch is more compact, and the space utilization rate is higher.

[0423] 3. The detection module is detachably mounted on the base, which facilitates maintenance or replacement of the detection module.

[0424] The present disclosure will be further described in conjunction with the drawings and specific embodiments.

[0425] Referring to FIGS. 72-79, the present embodiment provides a switchgear operating assembly, the switchgear is a rotary switch structure, the switchgear can be a disconnecting switch or a circuit breaker, in the present embodiment, the switchgear is a disconnecting switch. The switchgear operating assembly comprises an operating mechanism 1g and an operating handle 2g. The operating handle 2g is connected to the operating mechanism 1g of the disconnecting switch, and the rotation of the operating handle 2g generates a rotary motion, which can be transmitted to actuate the contact system of the switchgear to achieve opening and closing. Of course, the rotary motion can also be generated by means other than the operating handle 2g, such as a motor, etc.

[0426] The operating mechanism 1g comprises a base 10g, a main shaft 70g, a first gear 80g, a second gear 20g, an energy storage element 30g, a pin shaft 40g, a connecting rod 50g, and a linkage member 60g.

[0427] The main shaft 70g is rotatably mounted on the base 10g, and is used to transmit the rotary motion, such as the rotation of the operating handle 2g, which can be transmitted to actuate the contact system to achieve opening and closing. Specifically, the first gear 80g is coaxially connected to one end of the main shaft 70g, and the second gear 20g is rotatably mounted on the base 10g. The axis of the main shaft 70g is perpendicular to the axis of the second gear 20g. The first gear 80g comprises a first bevel gear structure, and the second gear 20g comprises a second bevel gear structure. The bevel gear structures of the first gear 80g and the second gear 20g cooperate with each other to achieve vertical power transmission. In the present embodiment, the vertical power transmission is achieved by the axis of the main shaft 70g being perpendicular to the axis of the second gear 20g. In other embodiments, depending on the specific rotation direction, the axis of the main shaft 70g can be at an angle to the axis of the second gear 20g, which is also a feasible technical solution.

[0428] Referring to FIGS. 72-74, the second gear 20g and the linkage member 60g are rotatably arranged in the base 10g, and the second gear 20g and the linkage member 60g are fitted by the plug-in structure to achieve synchronous rotation. The second gear 20g and / or the linkage member 60g is transmission connected to the contact system of the disconnecting switch, and the rotary motion of the second gear 20g and the linkage member 60g is used to actuate the contact system of the disconnecting switch to achieve opening and closing.

[0429] The energy storage element 30g can be a compression spring or a tension spring or other energy storage element such as a gas spring, and the embodiment is described by taking the compression spring as an example. The rotation of the linkage member 60g can actuate the energy storage element 30g to store energy. In the embodiment, the rotation of the linkage member 60g can compress the compression spring to store energy. The energy storage element 30g is sleeved on the connecting rod 50g, and the connecting rod 50g is used to guide and limit the energy storage element 30g during compression and energy release. In the embodiment, the energy storage element 30g is sleeved on the connecting rod 50g, so that the connecting rod 50g guides and limits the energy storage element 30g during energy storage and energy release. One end of the connecting rod 50g is hinged and positioned relative to the base 10g, for example, one end of the connecting rod 50g is hinged to the base 10g through the pin shaft 40g, so that one end of the connecting rod 50g is hinged and positioned relative to the base 10g. The other end of the connecting rod 50g is rotatably and slidably connected to the linkage member 60g. The energy storage element 30g is respectively abutted against the pin shaft 40g and the second gear 20g and / or the linkage member 60g at both ends.

[0430] As shown in FIGS. 74 and 75, the assembly of the second gear 20g and the linkage member 60g is rotated from the first position shown in the figure in the counterclockwise direction, and the distance between the second gear 20g or the linkage member 60g and the pin shaft 40g is shortened, so that the energy storage element 30g is compressed to store energy. When the assembly of the second gear 20g and the linkage member 60g rotates to a certain position, the compression of the energy storage element 30g reaches the maximum, so that the energy storage of the energy storage element 30g reaches the maximum. After reaching the position, the assembly of the second gear 20g and the linkage member 60g continues to rotate in the counterclockwise direction, and thereafter, the energy storage element 30g starts to release energy and drives the assembly of the second gear 20g and the linkage member 60g to rotate rapidly, so that the assembly of the second gear 20g and the linkage member 60g rotates to the second position.

[0431] As described above, the second gear 20g and / or the linkage member 60g is drivingly connected to the contact system, and the rotational movement of the second gear 20g and the linkage member 60g is used to actuate the contact system to realize the opening and closing of the contact system. When the second gear 20g and the linkage member 60g rotate from the first position to the second position, the contact state of the contact system is switched from the first state to the second state, for example, the contact system is switched from the open state to the closed state.

[0432] Referring to FIGS. 72-79, the operating mechanism 1g further comprises a detection module 90g for detecting the on / off state of the disconnecting switch.

[0433] The outer surface of the main shaft 70g is provided with a pushing protrusion 71g, and the base 10g is also provided with a displaceable connecting piece 110g between the main shaft 70g and the detection module 90g. When the main shaft 70g rotates, the pushing protrusion 71g rotates and moves towards the connecting piece 110g, the pushing protrusion 71g pushes the connecting piece 110g, so that the connecting piece 110g produces displacement movement. The displacement movement of the connecting piece 110g can push the push rod 91g of the detection module 90g to produce displacement movement.

[0434] The detection module 90g includes a shell 98g, and a push rod 91g, a movable contact 961g, a first static contact 942g and a second static contact 952g provided in the shell 98g, and the movable contact 961g is movably provided between the first static contact 942g and the second static contact 952g; the displacement movement of the push rod 91g can act on the movable contact 961g, so that the movable contact 961g and the first static contact 942g or the second static contact 952g are switched in contact.

[0435] Specifically, in this embodiment, the detection module 90g further includes a push rod 91g, a swing rod 92g, a common contact piece 93g, a first static contact piece 94g, a second static contact piece 95g, a movable contact piece 96g and a spring 97g installed in the shell 98g. The push rod 91g is displaceably installed in the shell 98g.

[0436] The first end of the first static contact piece 94g is provided with a first static contact 942g, and the first end of the second static contact piece 95g is provided with a second static contact 952g; one end of the movable contact piece 96g is connected to the common contact piece 93g, so that the movable contact piece 96g is cantileveredly installed, and the other end of the movable contact piece 96g forms a movable end, the movable end is provided with a movable contact 961g, and the movable contact 961g is movably provided between the first static contact 942g and the second static contact 952g. The displacement movement of the push rod 91g can act on the movable end of the movable contact piece 96g, so that the movable contact 961g is switched in contact with one of the first static contact 942g and the second static contact 952g and the other of the first static contact 942g and the second static contact 952g, that is, the movable contact 961g is switched in contact with the first static contact 942g or the second static contact 952g.

[0437] Specifically, in this embodiment, the swing rod 92g is pivotally installed in the shell 98g through a pivot shaft 921g, the push rod 91g abuts against the swing rod 92g, and the push rod 91g can push the swing rod 92g to pivot around the pivot shaft 921g. The first end of the spring 97g is connected to the swing rod 92g, and the second end of the spring 97g is connected to the movable end of the movable contact piece 96g. The displacement movement of the push rod 91g acts on the movable end of the movable contact piece 96g through the swing rod 92g and the spring 97g.

[0438] The active stroke range of the push rod 91g can enable the first end of the spring 97g to move from the first side of the movable contact 96g to the second side of the movable contact 96g, the first side and the second side of the movable contact 96g being two opposite sides. When the push rod 91g is not pushed by the connecting piece 110g, i.e., as shown in FIGS. 75 and 76, the movable end of the movable contact 96g is kept in contact with the second stationary contact 952g due to the elastic force of the spring 97g, and the movable contact 961g is kept disconnected from the first stationary contact 942g, i.e., the second stationary contact 95g is a normally closed contact, and the first stationary contact 94g is a normally open contact. After the push rod 91g is pushed by the connecting piece 110g, i.e., as shown in FIGS. 77 and 78, the push rod 91g pushes the swing rod 92g to pivot around the pivot shaft 921g, the swing rod 92g drives the spring 97g to move via the first end of the spring 97g, and the active stroke range of the push rod 91g can enable the movable contact 961g to be disconnected from the second stationary contact 952g and connected to the first stationary contact 942g and kept in the connected state. The design of the swing rod 92g increases the movement stroke of the push rod 91g, increases the product design margin, improves the product reliability, and reduces the manufacturing cost.

[0439] One end of the common contact 93g is provided with a common terminal 931g, the second end of the first stationary contact 94g is provided with a normally open terminal 941g, the second end of the second stationary contact 95g is provided with a normally closed terminal 951g, and the common terminal 931g, the normally open terminal 941g and the normally closed terminal 951g are connected to the detection lead wire through the lead wire mounting seat, so that the on / off state of the disconnector can be easily judged by detecting the conduction between the common terminal 931g and the normally open terminal 941g and the normally closed terminal 951g.

[0440] The swing rod 92g is L-shaped, so that the main body of the spring 97g is located on the basis of one end of the spring 97g, the space utilization rate is higher, and the structure is more compact.

[0441] The swing rod 92g is sheet-shaped, one end of which is provided with a pivot notch 922g, which is matched with the pivot shaft 921g, so as to realize the pivot mounting of the swing rod 92g on the housing 98g through the pivot shaft 921g. The structure is simple and reasonable in design, and the swing rod 92g can be punched from a sheet-shaped base material, so that the manufacturing cost is low.

[0442] Preferably, the outer surface of the main shaft 70g is circumferentially provided with two push protrusions 71g, the connecting piece 110g and the detection module 90g are both provided with two groups, and the two groups of detection modules 90g and the connecting piece 110g are symmetrically arranged, so that the stress of the main shaft 70g is more balanced, and the two groups of detection modules 90g also improve the detection accuracy.

[0443] Further, the detection module 90g is obliquely mounted relative to the connecting piece 110g, so that the displacement movement direction of the push rod 91g and the displacement movement direction of the connecting piece 110g form an included angle, and the included angle is greater than 0 degrees, so that the obliquely mounted detection module 90g can avoid the transmission structure such as the main shaft 70g, the first gear 80g, the second gear 20g, the energy storage element 30g, the pin shaft 40g, the connecting rod 50g and the linkage member 60g, so that the appearance of the disconnecting switch is more compact, and the space utilization is higher.

[0444] The detection module 90g is detachably mounted on the base 10g, and the base 10g is provided with a side cover 11g corresponding to the position of the detection module 90g. The side cover 11g is detachably mounted on the base 10g. By opening the side cover 11g, the detection module 90g can be conveniently maintained or replaced. Referring to FIG. 79, the base 10g is provided with a base hook 13g and a base positioning protrusion 14g, and the shell 98g of the detection module 90g is provided with a shell clamping protrusion 981g and a shell positioning surface 982g. The base hook 13g is hooked and matched with the shell clamping protrusion 981g, and the base positioning protrusion 14g abuts against the shell positioning surface 982g, so as to realize that the detection module 90g is detachably mounted on the base 10g, and improve the installation and positioning accuracy and reliability of the detection module 90g.

[0445] The connecting piece 110g is provided with an inclined surface 111g, and the inclined surface 111g abuts against the push rod 91g, so that the displacement movement of the connecting piece 110g is transmitted to the push rod 91g through the inclined surface 111g, and is converted into the displacement movement of the push rod 91g. Compared with the linear pushing arrangement of the connecting piece 110g and the push rod 91g, in the embodiment, the inclined surface 111g abuts against the push rod 91g, and then pushes the push rod 91g through the inclined surface 111g, so that the transmission effect is better, and the transmission structure is more reasonable. Therefore, on the basis of the obliquely mounted detection module 90g which is beneficial to miniaturization, better transmission effect can also be realized to ensure detection reliability.

[0446] The connecting piece 110g is also provided with a limiting groove 112g, and the base 10g is also provided with a limiting protrusion 12g, and the limiting protrusion 12g is matched in the limiting groove 112g, so as to limit the maximum movement stroke of the connecting piece 110g, avoid the connecting piece 110g from falling out when the detection module 90g is detached, and make the installation and positioning of the connecting piece 110g on the base 10g more reliable.

[0447] The isolator plays an isolating role in the circuit, and is mainly used for connecting and cutting off the circuit, i.e. disconnecting the part needing power-off from the live part in the circuit, so as to ensure that the maintenance work can be safely carried out. The isolator is widely used in places such as fire fighting, hospitals and banks where large-area power-off is not allowed. The isolator comprises a handle body for controlling the closing or opening of the isolator. The handle body is usually exposed to the outside for easy operation, and the isolator is arranged in an electrical cabinet. The electrical cabinet usually needs to reach a certain protection level, which requires the handle assembly to have certain air tightness requirements. In order to prevent the operation handle body from being touched by mistake, a locking pin is arranged in the handle body. However, the arrangement of the locking pin makes the sealing structure of the existing handle assembly complex, resulting in a complex overall structure of the product. In addition, when the handle body is operated, the rotating position of the handle body cannot be clearly perceived to determine the closing or opening state of the isolator.

[0448] To this end, the present disclosure also provides a handle assembly for use in an isolator, comprising an operation handle, a stopper and a base, the operation handle being rotatable relative to the base, so that the isolator can be switched between the closing and opening states by rotating the operation handle; the stopper is displaceably mounted on the operation handle, the stopper having a first position and a second position relative to the base, the stopper being actuated to move from the first position to the second position, the stopper being disengaged from the base when the stopper is in the first position, and the operation handle being rotatable relative to the base; when the stopper is in the second position, the stopper is clamped in a stop hole of the base, and the rotation of the operation handle relative to the base is locked, and the stop hole is a blind hole.

[0449] In one embodiment, a first matching protrusion and a second matching protrusion are arranged on the side of the operation handle facing the base, and a first matching groove and a second matching groove are arranged on the base, the first matching protrusion being capable of matching with the first matching groove, and the second matching protrusion being capable of matching with the second matching groove; a first sealing member is arranged in the first matching groove, and a second sealing member is arranged in the second matching groove.

[0450] In one embodiment, a limiting shaft is further included, the operation handle is further provided with a pin mounting groove, the limiting shaft is displaceably mounted in the pin mounting groove, and a pushing member is arranged between the limiting shaft and the operation handle, the pushing member pushes the limiting shaft towards the base, the base is provided with a plurality of positioning grooves, and the limiting shaft can be slidably clamped into the positioning grooves with the rotation of the operation handle.

[0451] In one embodiment, four positioning grooves are arranged around the center of the base.

[0452] In one embodiment, a first mark and a second mark are arranged on the outer surface of the base, corresponding to the positions of the handle rotating to the closed and open states of the disconnector respectively.

[0453] In one embodiment, the pushing member is a spring.

[0454] In one embodiment, a padlock is further arranged, which is pivotally arranged on the handle through a pivot shaft, and a pushing protrusion is arranged on one side of the pivot shaft of the padlock, so that the pushing protrusion can push the stopper to move from the first position to the second position when the padlock rotates relative to the handle.

[0455] In one embodiment, the stopper comprises a pushing end surface and a guide inclined surface connected to the pushing end surface.

[0456] In one embodiment, the stopper comprises a cylindrical body and a reset portion connected to one end of the cylindrical body, and two reset portions are arranged on both sides of the cylindrical body respectively; the handle assembly further comprises two reset members, and the two ends of the reset members abut against the reset portions and the handle respectively.

[0457] The disclosure further provides a disconnector comprising the handle assembly as any one of the preceding embodiments.

[0458] The technical scheme provided by the disclosure has the following technical effects:

[0459] 1. The disclosure provides a handle assembly for a disconnector, comprising a handle, a stopper and a base, when the stopper is in a first position, the stopper is separated from the base, and the handle is rotatable relative to the base; when the stopper is in a second position, the stopper is clamped in a stop hole of the base, and the rotation of the handle relative to the base is locked, and the stop hole is a blind hole. Compared with other schemes in which the stop hole is a through hole and a sealing member needs to be arranged between the stopper and the stop hole, in this scheme, the stop hole is a blind hole, so that the sealing member does not need to be arranged between the stopper and the stop hole, thereby simplifying the structure and reducing the manufacturing cost.

[0460] 2. The handle assembly further comprises a limiting shaft, and a pushing member is arranged between the limiting shaft and the handle, the pushing member pushes the limiting shaft towards the base, the base is provided with a plurality of positioning grooves, and the limiting shaft can be slidably clamped into the positioning grooves with the rotation of the handle. The operator can feel the sound of the limiting shaft slidingly clamped into the positioning groove, so as to determine the position of rotation and assist in determining the open and closed states of the disconnector.

[0461] The present disclosure will be further described with reference to the drawings and specific embodiments.

[0462] Referring to Figs. 80-89, the present embodiment provides a handle assembly 1h for use in an isolating switch, the handle assembly 1h comprising an operating handle 10h, a padlock 20h, a stopper 30h, a reset member 40h and a base 50h. The operating handle 10h is rotatable relative to the base 50h, so that the isolating switch can be switched between the closed or open state by rotating the operating handle 10h.

[0463] The stopper 30h is displaceably mounted on the operating handle 10h. The operating handle 10h is provided with a stopper mounting slot (not shown) for accommodating the stopper 30h. The stopper 30h has a first position and a second position relative to the base 50h, and the stopper 30h can be actuated to move from the first position to the second position. When the stopper 30h is in the first position, the operating handle 10h is rotatable relative to the base 50h, as shown in Fig. 84, where the stopper 30h is in the first position. When the stopper 30h is in the second position, the rotation of the operating handle 10h relative to the base 50h is locked.

[0464] Referring to Figs. 80-86, the padlock 20h is pivotally mounted on the operating handle 10h, and the operating handle 10h is further provided with a padlock mounting slot 11h for accommodating the padlock 20h. The padlock 20h is provided with a pivot shaft 21h, and the padlock 20h is pivotally mounted on the operating handle 10h via the pivot shaft 21h. The padlock 20h is provided with a push protrusion 22h on one side of the pivot shaft 21h. When the padlock 20h rotates relative to the operating handle 10h, for example, rotates in the direction M from the initial position shown in Fig. 84, the push protrusion 22h can push the stopper 30h to move from the first position to the second position, so that the stopper 30h is clamped in the base 50h, and the rotation of the operating handle 10h relative to the base 50h is locked. Specifically, the stopper 30h is clamped in the stopper hole 51h of the base 50h, so that the rotation of the operating handle 10h relative to the base 50h is locked.

[0465] The stopper hole 51h is a blind hole. Compared with some other solutions in which the stopper hole 51h is a through hole, a sealing member needs to be provided between the stopper 30h and the stopper hole 51h. In the present embodiment, the stopper hole 51h is a blind hole, so that a sealing member does not need to be provided between the stopper 30h and the stopper hole 51h, thereby simplifying the structure and reducing the manufacturing cost.

[0466] The stopper 30h comprises a cylindrical body 32h, and reset portions 31h connected to one end of the cylindrical body 32h, and the reset portions 31h are provided with two, and the two reset portions 31h are respectively located on both sides of the cylindrical body 32h, and the reset member 40h is also provided with two, and the two ends of the reset member 40h respectively abut against the reset portions 31h and the operating handle 10h, thereby providing a restoring force for the stopper 30h to return to the initial position, that is, providing a restoring force for the stopper 30h to return from the second position to the first position. In the embodiment, the reset member 40h is a spring, but is not limited thereto. For example, the reset member 40h can also be a reset push rod and the like. When in the first position, the stopper 30h is separated from the base 50h, and the operating handle 10h is rotatable relative to the base 50h.

[0467] Referring to FIGS. 80-86, the stopper 30h further comprises a pushing end surface 33h and a guide inclined surface 34h obliquely connected to the pushing end surface 33h. When the padlock 20h is rotated relative to the operating handle 10h from the initial position shown in FIG. 84 along the direction M, the pushing protrusion 22h first contacts and presses the guide inclined surface 34h, thereby providing an initial pushing force for the movement of the stopper 30h, and the pushing protrusion 22h pushes the stopper 30h more easily. The operating handle 10h continues to rotate along the direction M until the pushing protrusion 22h contacts and stably abuts against the pushing end surface 33h, and the padlock 20h stably holds the stopper 30h in the second position, thereby locking the rotation of the operating handle 10h relative to the base 50h, and the locked state is stably maintained, which can prevent the operating handle 10h from being rotated by mistake.

[0468] In the embodiment, the stopper 30h is moved from the first position to the second position by the padlock 20h, and the reset member 40h provides a restoring force for the stopper 30h to return from the second position to the first position. However, it is not limited thereto. In other embodiments, the stopper 30h can be actuated and returned to the position by other ways, for example, by a pushing cylinder and the like.

[0469] Referring to FIGS. 87-89, in the embodiment, one side of the operating handle 10h facing the base 50h is provided with a first matching protrusion 12h and a second matching protrusion 13h, and the base 50h is provided with a first matching groove 53h and a second matching groove 54h. The first matching protrusion 12h matches with the first matching groove 53h, and the second matching protrusion 13h matches with the second matching groove 54h, thereby enabling the operating handle 10h to rotate relative to the base 50h. In the embodiment, the first matching protrusion 12h and the second matching protrusion 13h are both circular ring protrusions, but are not limited thereto. For example, in some other embodiments, the first matching protrusion 12h can be a circular protrusion, and the second matching protrusion 13h can be a circular ring protrusion.

[0470] In the embodiment, the first sealing member 61h is installed in the first matching groove 53h, and the second sealing member 62h is installed in the second matching groove 54h. The first sealing member 61h and the second sealing member 62h can be annular sealing rings, such as O-rings, so as to seal the gap between the operating handle 10h and the base 50h, thereby improving the sealing performance of the handle assembly 1h.

[0471] The operating handle 10h is further provided with a pin mounting groove 14h, and the limiting shaft 60h is displaceably installed in the pin mounting groove 14h. A pushing member 70h is arranged between the limiting shaft 60h and the operating handle 10h. In the embodiment, the pushing member 70h is a spring, but is not limited thereto. The pushing member 70h can also be a push rod or the like.

[0472] The pushing member 70h pushes the limiting shaft 60h towards the base 50h. The base 50h is provided with a plurality of positioning grooves 52h, which are uniformly arranged around the center of the base 50h. In the embodiment, four positioning grooves 52h are uniformly arranged around the center of the base 50h. However, the number and positions of the positioning grooves 52h can be set according to actual needs. The limiting shaft 60h can be slidably clamped into the positioning groove 52h along with the rotation of the operating handle 10h. At this time, the operator can feel the obvious sound of the limiting shaft 60h slidingly clamped into the positioning groove 52h, so as to determine the position of rotation and assist in determining the on-off state of the disconnecting switch. When the limiting shaft 60h slides out of the positioning groove 52h, there is no sound.

[0473] Further, referring to FIGS. 80-81, the first mark 101h and the second mark 102h are arranged on the outer surface of the base 50h, respectively corresponding to the positions of the operating handle 10h rotated to the on and off states of the disconnecting switch, so as to further assist the operator in determining the on-off state of the disconnecting switch in combination with the aforementioned sound.

[0474] The embodiment further provides a disconnecting switch, which comprises the handle assembly 1h as described above.

[0475] Although the present disclosure is specifically shown and described in connection with the preferred embodiments, those skilled in the art should understand that various changes in form and details can be made to the present disclosure without departing from the spirit and scope of the present disclosure defined by the appended claims, which are all within the protection scope of the present disclosure.

Claims

1. A switching unit of a switching device, the switching unit comprising a movable contact, a stationary contact, and an arc extinguishing assembly, the movable contact being provided in an operation-performing assembly, the movable contact being operated to be closed or interrupted with the stationary contact by the operation-performing assembly, characterized in that: The arc extinguishing assembly is linked to the action executing assembly, and the arc extinguishing assembly is provided with an arc separating part. When the movable contact part and the fixed contact part are closed or disconnected, the arc separating part of the arc extinguishing assembly is selectively located in a avoiding position or an arc extinguishing position, so that the arc separating part forms a physical isolation barrier between the movable contact part and the fixed contact part in the arc extinguishing position to extinguish the arc. The arc extinguishing assembly and the action executing assembly are linked through a toothed transmission mechanism.

2. The switching unit of the switch electric appliance according to claim 1, wherein the action executing assembly is a rotating assembly comprising a rotating disc, and the movable contact part rotates under the driving of the rotating disc to close or disconnect the movable contact part and the fixed contact part; the rotating disc is provided with a first transmission tooth structure, the arc extinguishing assembly is provided with a second transmission tooth structure, the first transmission tooth structure and the second transmission tooth structure are matched to form the toothed transmission mechanism, and the arc separating part is switched between the avoiding position and the arc extinguishing position under the driving of the second transmission tooth structure.

3. The switching unit of the switch electric appliance according to claim 2, wherein the first transmission tooth structure is a structure provided outside the rotating disc and having at least one part of an external gear, and the second transmission tooth structure is any one of a straight rack structure, an arc-shaped internal rack structure and a gear structure comprising at least one part of an external gear.

4. The switching unit of the switch electric appliance according to claim 3, wherein a part of the first transmission tooth structure and the movable contact part are arranged in an axial direction of the rotating disc, the arc extinguishing assembly further comprises an arc separating piece, the arc separating piece comprises an arc separating rotating shaft and a plurality of second engaging teeth provided outside the arc separating rotating shaft, at least one part of the second engaging teeth forms the second transmission tooth structure, so that the second transmission tooth structure is formed as a gear structure; at least one second engaging tooth extends in the axial direction of the rotating disc to separate the movable contact part and the fixed contact part to achieve arc extinguishing, so that the second engaging tooth for separating the movable contact part and the fixed contact part forms the arc separating part.

5. The switching unit of the switch electric appliance according to claim 4, wherein the rotating disc is provided outside with first engaging teeth for forming the first transmission tooth structure, the second engaging teeth forming the arc separating part are further used to form toothed transmission matching with at least one first engaging tooth, so that the first engaging tooth and the arc separating part cooperatively form the physical isolation barrier; and / or the arc separating piece is further provided with a plurality of arc pressing parts, the arc pressing parts and the arc separating part are arranged adjacent to each other in a circumferential direction of the arc separating rotating shaft, a plurality of the arc pressing parts are arranged in an axial direction of the arc separating rotating shaft, and a groove for accommodating the movable contact part is formed between adjacent arc pressing parts.

6. The switching unit of the switch electric appliance according to claim 4, wherein the arc separating piece is further provided with a vane part, the vane part is located on a side of the arc separating rotating shaft away from the movable contact part, and the vane part is at least one, and at least one vane part is arranged in the circumferential direction of the arc separating rotating shaft. ​ 7. The switching unit of the switchgear according to claim 3, wherein the arc extinguishing assembly further comprises an arc separating piece, the arc separating piece comprises an arc separating cover, the arc separating cover is a cover-shaped structure for surrounding the static contact part, a part of the arc separating cover forms the arc separating part, the arc separating piece further comprises an arc separating rotating shaft and a transmission plate provided on the arc separating rotating shaft, edges of the transmission plate are provided with a plurality of second engaging teeth, the second engaging teeth form the second transmission tooth structure, and the second transmission tooth structure is formed as a gear structure.

8. The switching unit of the switchgear according to claim 7, further comprising a base, the arc separating piece is rotatably arranged on the base through the arc separating rotating shaft, the arc separating cover further comprises a first connecting part and a second connecting part connected to the arc separating rotating shaft, the first connecting part is a sheet-shaped structure extending along the axial direction and the radial direction of the arc separating rotating shaft respectively, the second connecting part is a sheet-shaped structure extending along the radial direction and the circumferential direction of the arc separating rotating shaft respectively, and the second connecting part is located at one end of the arc separating rotating shaft close to the base, in the radial direction of the arc separating rotating shaft, the arc separating part is respectively connected to the outer edges of the first connecting part and the second connecting part, so that the arc separating cover forms the cover-shaped structure with the opening facing away from the base.

9. The switching unit of the switchgear according to claim 8, wherein the rotating disc piece is rotatably arranged on the base, one end of the rotating disc piece close to the base is provided with an arc blocking part extending along the radial direction thereof, the arc blocking part is located between the base and the arc separating cover, and the arc blocking part is located between the moving contact part and the static contact part when the arc separating part is in the arc extinguishing position in the circumferential direction of the rotating disc piece.

10. The switching unit of the switchgear according to claim 3, wherein the arc extinguishing assembly further comprises an arc separating piece in a plate-shaped structure, a side surface of the arc separating piece facing the first transmission tooth structure is provided with a plurality of second engaging teeth, the second engaging teeth form the second transmission tooth structure, and a part of the arc separating piece corresponding to the moving contact part forms the arc separating part.

11. The switching unit of the switchgear according to claim 10, wherein the arc separating piece is an arc-shaped plate-shaped structure or a flat plate-shaped structure, so that the second transmission tooth structure is correspondingly formed as an arc-shaped inner rack structure or a straight rack structure; and / or the moving contact part and a part of the first transmission tooth structure are arranged at intervals along the axial direction of the rotating disc piece, in the axial direction of the rotating disc piece, the second engaging teeth extend along the part of the arc separating piece, so that the arc separating part and the second transmission tooth structure correspond to the moving contact part and the first transmission tooth structure respectively in the axial direction of the rotating disc piece. ​ 12. The switching unit of the switchgear according to claim 1, wherein the switching unit further comprises a base, the arc extinguishing assembly is arranged on the base, a surface of the base on which the arc extinguishing assembly is arranged is provided with a first isolation structure, the arc extinguishing assembly is provided with a second isolation structure, the first isolation structure cooperates with the second isolation structure to form an isolation structure when the arc extinguishing assembly is in the arc extinguishing position, and the first isolation structure and the second isolation structure partially overlap in a direction of the base towards the arc extinguishing assembly.

13. The switching unit of the switchgear according to claim 12, wherein the first isolation structure is a guide plate extending along a movement path of at least a portion of the arc separation portion, and the second isolation structure is arranged on an edge of the arc separation portion facing the base.

14. The switching unit of the switchgear according to claim 13, wherein a movement speed of the arc extinguishing assembly is twice a movement speed of the action execution assembly, so that the arc separation portion cooperates with the guide plate to form a physical isolation barrier during movement of the movable contact portion away from the stationary contact portion.

15. The switching unit of the switchgear according to claim 1, wherein the arc extinguishing assembly further comprises an arc separation piece linked to the action execution assembly. The switching unit further comprises an arc extinguishing grid assembly comprising a plurality of arc extinguishing pieces arranged at intervals, at least a portion of the arc extinguishing pieces being arranged on at least one side of a movement track of the arc separation portion and covering a partial area on the at least one side, so that the arc separation portion presses at least a portion of the electric arc towards the arc extinguishing grid assembly with action of the arc separation piece.

16. The switching unit of the switchgear according to claim 15, wherein the arc extinguishing pieces of the arc extinguishing grid assembly are divided into a plurality of portions, wherein a first portion of the arc extinguishing pieces constitutes a first grid group, the arc extinguishing pieces of the first grid group are arranged at intervals on one side of the movement track of the arc separation portion and cooperate with the arc separation portion to form a small gap, so that the arc separation portion presses at least a portion of the electric arc towards the first grid group with action of the arc separation piece.

17. The switching unit of the switchgear according to claim 16, further comprising an insulating arc blocking portion, the arc blocking portion is arranged in a partial ring shape in a direction away from the arc separation portion of the first grid group.

18. The switching unit of the switchgear according to claim 16, wherein a second portion of the arc extinguishing pieces of the arc extinguishing grid assembly constitutes a second grid group, the second grid group is arranged on one side of the movement track of the arc separation portion and cooperates with the arc separation portion to form a small gap, the second grid group and the first grid group are arranged on opposite sides of the movement track of the arc separation portion respectively, the arc extinguishing pieces of the second grid group are arranged at intervals along the movement track of the arc separation portion, so that the arc separation portion also presses the electric arc towards the second grid group with action of the arc separation piece.

19. The switching unit of the switchgear according to claim 16, wherein the third portion of the arc extinguishing fin assembly is composed of a third fin group, the arc extinguishing fins of the third fin group being arranged in intervals along the movement locus of the movable contact, so as to press a part of the arc towards the third fin group by means of the movement of the movable contact along the breaking direction.

20. The switching unit of the switchgear according to claim 19, wherein the third fin group is provided with a protrusion, the protrusion being used to coincide with at least a part of the movable contact in its extending direction.

21. The switching unit of the switchgear according to claim 15, wherein the arc separation member is rotatably arranged on a base, the arc separation member being a cover-shaped structure, comprising an arc separation rotating shaft rotatably arranged on the base, an arc separation portion being an arc-shaped plate-shaped structure arranged outside the arc separation rotating shaft, and a first connecting portion connected to the arc separation rotating shaft and the arc separation portion, the arc separation portion being arranged on the side of the first connecting portion away from the base, the base being provided with a first sliding structure, the side of the first connecting portion facing the base being provided with a second sliding structure, the first sliding structure and the second sliding structure being in concave-convex cooperation.

22. The switching unit of the switchgear according to claim 21, wherein the first sliding structure is a sliding plate protruding from the surface of the base, and the second sliding structure is a sliding groove corresponding in shape to the sliding plate; and / or, the arc separation portion further being used to cut the arc during the process of switching to the arc separation position, the end of the arc separation portion used to cut the arc being defined as the arc cutting end, the arc extinguishing fin assembly being arranged at the end of the arc separation portion where the arc cutting end is located, so that at least a part of the arc extinguishing fins cover the area of the arc cutting end on at least one side of the arc separation portion, and further comprising a second connecting portion arranged at the opposite end of the arc cutting end of the arc separation portion.

23. A switchgear, comprising a switching unit according to any one of claims 1-22.

24. The switchgear according to claim 23, wherein the switchgear is a circuit breaker or a disconnector.

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