Switch unit and rotary disconnecting switch

Abstract

The invention discloses a switch unit and a rotary disconnecting switch. The switch unit comprises a shell, a moving contact module and a static contact module, the moving contact module comprises a driving mechanism and at least two mutually independent moving contacts, and the static contact module at least comprises four static contacts; wherein every two static contacts are contacted with or separated from one moving contact to realize connection or disconnection, and the two static contacts and the moving contact form a loop switch.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a switch unit and a rotary isolating switch. Background Art

[0002] The rotary disconnector is usually composed of an operating mechanism unit and several stacked switch units. The switch unit includes a unit housing, in each of which a pair of oppositely arranged static contact assemblies and a rotatable moving contact module are installed. The moving contact module is fixed on the rotating shaft, and the operating mechanism can operate the rotating shaft to rotate, thereby driving the moving contact to contact or disconnect the static contact, thereby realizing the conduction or disconnection of the two static contacts.

[0003] Based on the design of the moving contacts and stationary contacts of the existing switch unit, each unit layer is provided with one incoming line and one outgoing line. The stationary contact connected to the incoming and outgoing lines is rotated and overlapped internally through a bridge-type contact to realize the conduction and disconnection functions of a circuit.

[0004] As the application side's demands for product performance and parameters become increasingly higher, the existing rotary isolating switches can no longer meet the design requirements and are in urgent need of improvement. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a switch unit.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A switch unit comprises: a housing, a moving contact module, and a stationary contact module; the moving contact module comprises a driving mechanism and at least two moving contacts independent of each other, and the stationary contact module comprises at least four stationary contacts;

[0008] Wherein, every two stationary contacts are in contact with or separated from a moving contact to realize conduction or disconnection, and the two stationary contacts and the moving contact form a loop switch.

[0009] Preferably, the moving contact module includes: a first moving contact and a second moving contact that are independent of each other; the static contact module includes: a first static contact, a second static contact, a third static contact and a fourth static contact; the first static contact and the second static contact form a loop switch with the first moving contact, and the third static contact and the fourth static contact form a loop switch with the second moving contact.

[0010] Preferably, the first static contact and the second static contact are arranged at intervals on the first side of the shell, and the third static contact and the fourth static contact are arranged at intervals on the second side opposite to the first side; the first moving contact and the second moving contact are arranged between the first side and the second side.

[0011] Preferably, the driving mechanism comprises a rotatably arranged transmission shaft and a transmission mechanism transmission-connected to the transmission shaft, and the first moving contact and the second moving contact are respectively connected to output ends of the transmission mechanism.

[0012] Preferably, the transmission mechanism includes a rotating frame fixed on the transmission shaft, a first connecting rod and a second connecting rod respectively hinged to the rotating frame, the first moving contact and the second moving contact are respectively hinged to the output ends of the first connecting rod and the second connecting rod, and the switch unit is provided with a limiting structure to limit the movement path of the first moving contact and the second moving contact 42 so that they slide along a preset path under the drive of the first connecting rod and the second connecting rod, thereby realizing contact and separation with the first static contact, the second static contact, the third static contact and the fourth static contact.

[0013] Preferably, the limiting structure includes a first slide rail arranged on the shell and extending from the rotating frame toward the first static contact and the second static contact, a second slide rail extending toward the third static contact and the fourth static contact, a first slider arranged on the first slide rail, and a second slider arranged on the second slide rail, and the first slider and the second slider are respectively connected to the first moving contact and the second moving contact.

[0014] Preferably, the rotating frame is provided with a first driving shaft and a second driving shaft on radially opposite sides, the first end of the first connecting rod is provided with a first driving hole, and the first end of the second connecting rod is provided with a second driving hole, and the rotating frame is hinged to the first driving hole of the first connecting rod and the second driving hole of the second connecting rod through the first driving shaft and the second driving shaft, respectively.

[0015] Preferably, the second ends of the first connecting rod and the second connecting rod are respectively provided with a first connecting hole and a second connecting hole, and the first connecting rod and the second connecting rod are respectively hinged to the first moving contact and the second moving contact through the first connecting hole and the second connecting hole.

[0016] Preferably, the driving mechanism includes a transmission shaft and a rotating frame drivingly connected to the transmission shaft, and the first moving contact and the second moving contact are respectively arranged on both sides of the rotating frame, corresponding to the positions of the first static contact, the second static contact, the third static contact and the fourth static contact respectively.

[0017] Preferably, the driving mechanism includes a support member and a slide rail, the moving contact is mounted on the support member, and slidingly cooperates with the slide rail through the support member, the support member includes a slider slidingly connected to the slide rail, a contact connecting part fixedly connected to the moving contact, and a transmission connecting part for transmission connection with the driving mechanism.

[0018] Preferably, the shell is rectangular as a whole, the first static contact and the second static contact are arranged at intervals on the left side and close to the left side wall of the shell, the third static contact and the fourth static contact are arranged on the right side and close to the right side wall of the shell, the transmission shaft of the driving mechanism is located in the center of the shell, the first moving contact is located between the transmission shaft and the left side wall, a first slide rail is provided between the transmission shaft and the left side wall, and arc extinguishing chambers are provided on both sides of the sliding track of the first slide rail; the second moving contact is located between the transmission shaft and the right side wall, a second slide rail is provided between the transmission shaft and the right side wall, and arc extinguishing chambers are provided on both sides of the sliding track of the second moving contact.

[0019] Preferably, the circuit switch composed of the first stationary contact, the second stationary contact and the first moving contact and the circuit switch composed of the third stationary contact, the fourth stationary contact and the second moving contact are stacked and connected in series.

[0020] The present invention further provides a rotary isolating switch, comprising at least two stacked switch units as described above.

[0021] Preferably, at least one loop switch of a switch unit is connected in series with at least one loop switch of another adjacent switch unit.

[0022] At least two moving contacts are arranged in a single-layer housing of the switch unit of the present invention, and at least four stationary contacts are arranged correspondingly. One moving contact and two stationary contacts constitute a circuit switch, so one switch unit layer of the present invention can realize the on and off control of at least two circuits. In the case where one switch unit layer can control two circuits, the setting of the wiring space can be more flexible, and the space occupied by the rotary isolating switch can be further reduced (because under the same volume, the present invention can control at least twice as many circuits, conversely, under the control of the same number of circuits, the rotary isolating switch of the present invention has fewer layers, and thus occupies less space). BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural schematic diagram of a switch unit of the present invention;

[0024] Figure 2 It is a schematic diagram of the switch unit of the present invention in the open state;

[0025] Figure 3 is a schematic diagram of a switch unit in a closed state of the present invention;

[0026] Figure 4 is a schematic diagram of a switch unit rotating frame of the present invention;

[0027] Figure 5 is a schematic diagram of the first connecting rod structure of the present invention;

[0028] Figure 6is a schematic diagram of the second connecting rod structure of the present invention;

[0029] Figure 7 is a schematic diagram of a movable contact arrangement method according to another embodiment of the present invention;

[0030] Figure 8 is a circuit control schematic diagram of the switch unit of the present invention;

[0031] Fig. 9 is a schematic structural diagram of a link mechanism on one side in the second embodiment of the present invention;

[0032] Fig.10 is a structural schematic diagram of the other side connecting rod mechanism in the second embodiment of the present invention;

[0033] Fig.11a is a schematic structural diagram of a moving contact in Embodiment 3 of the present invention;

[0034] Fig.11b is a structural schematic diagram of the moving contact in another perspective of the third embodiment of the present invention;

[0035] Fig.12 is a schematic diagram of the structure of the moving contact piece in the third embodiment of the present invention;

[0036] Fig.13 is a schematic structural diagram of a static contact in Embodiment 3 of the present invention;

[0037] Fig.14 is a schematic structural diagram of a support member in Embodiment 3 of the present invention;

[0038] Fig.15 is a structural schematic diagram of a switch unit in Embodiment 4 of the present invention;

[0039] Fig.16 is a schematic diagram of the shell structure in the fourth embodiment of the present invention;

[0040] Fig.17 is a schematic diagram of the decomposition structure of a switch unit according to a fourth embodiment of the present invention;

[0041] Fig.18a This is a schematic diagram of a switch unit series connection structure according to a fifth embodiment of the present invention;

[0042] Fig.18b This is a current schematic diagram of a switch unit series connection structure according to a fifth embodiment of the present invention;

[0043] Fig.19 is a schematic diagram of through holes internally connected in series between switch units in a fifth embodiment of the present invention;

[0044] Fig.20a is a schematic diagram of another switch unit series connection structure according to the fifth embodiment of the present invention;

[0045] Fig.20b is a current schematic diagram of another switch unit series connection structure according to the fifth embodiment of the present invention;

[0046] Fig.21 is a schematic diagram of the structure of external series connection between switch units in Embodiment 5 of the present invention;

[0047] Fig. 22 is a schematic diagram of a switch unit series circuit according to a sixth embodiment of the present invention;

[0048] Fig.23 It is a schematic diagram of the series connection of the integrally formed static contacts of the sixth embodiment of the present invention.

[0049] 10 case 103 Slide rails 103a First slide rail 103b Second slide rail 1a First shell 1b Second shell 20 Interrupter 30 Stationary contact 31 First stationary contact 32 Second static contact 33 The third static contact 34 Fourth static contact 31a First stationary contact 32a Second static contact 31b The third static contact 32b Fourth static contact 301 Contact body 302 Contact contact part 40 Moving contact 41 First moving contact 42 Second moving contact 40a First moving contact 40b Second moving contact 413 Bending Department 414 Bending Department 402 Opening structure 403 Opening structure 401 Support connection part 4012 keyway 4131 Guide flange 4131 Guide flange 4132 Arc starting edge 4142 Arc starting edge 4133 Arc starting tip 4143 Arc starting tip 5a First connecting rod 5b Second connecting rod 60 Rotating frame 70 transmission shaft 5c Third Link 5d Fourth connecting rod 501a First drive hole 501b Second drive hole 603 First drive shaft 604 Second drive shaft 80 Support 801 Transmission connection 802 slider 803 Contact connection 804 Limiting surface 1030 Retaining Wall 1031 Slide surface 411 Support surface DETAILED DESCRIPTION

[0050] The following is a further description of the specific implementation of the switch unit of the present invention in conjunction with the embodiments given in the accompanying drawings. The switch unit of the present invention is not limited to the description of the following embodiments.

[0051] The rotary isolating switch usually includes an operating unit and at least one switch unit, which are stacked. The switch unit includes a moving contact module and a stationary contact module. The operating unit is provided with an output shaft, which is connected to a transmission shaft 70 of the switch unit. The transmission shafts 70 of adjacent switch units are connected. The output shaft of the operating unit drives the transmission shaft 70 to rotate, thereby driving the switch unit to close and open synchronously.

[0052] Embodiment 1

[0053] like Figure 1-3 The figure shows a specific embodiment of a switch unit of a rotary isolating switch, including: a shell 10, a moving contact module, and a stationary contact module; the moving contact module 4 includes a driving mechanism and at least two independent moving contacts 40 (including a first moving contact 41 and a second moving contact 42), and the stationary contact module includes at least four stationary contacts 30 (including a first stationary contact 31, a second stationary contact 32, a third stationary contact 33 and a fourth stationary contact 34).

[0054] In this embodiment, every two stationary contacts 30 are turned on or off by contacting or separating with a moving contact 40 , and the two stationary contacts 30 form a loop switch with the moving contact 40 .

[0055] That is to say, in this embodiment, one switch unit layer can realize the control of at least two loop switches, and has higher scalability compared with traditional switch units.

[0056] In this embodiment, the moving contact module includes: a first moving contact 41 and a second moving contact 42 that are independent of each other; the static contact module includes: a first static contact 31, a second static contact 32, a third static contact 33 and a fourth static contact 34; the first static contact 31 and the second static contact 32 form a loop switch with the first moving contact 41, and the third static contact 33 and the fourth static contact 34 form a loop switch with the second moving contact 42.

[0057] In this embodiment, the first static contact 31 and the second static contact 32 are arranged at a distance on the first side of the housing 10, and the third static contact 33 and the fourth static contact 34 are arranged at a distance on the second side opposite to the first side; the first moving contact 41 and the second moving contact 42 are arranged between the first side and the second side.

[0058] In this embodiment, the driving mechanism includes a transmission shaft 70 that passes through the housing 10 and a transmission mechanism that is transmission-connected to the transmission shaft 70. The first moving contact 41 and the second moving contact 42 are connected to the output end of the transmission mechanism. The two moving contacts are driven to slide by the rotation of the transmission shaft 70 to realize the control of two circuit switches, which takes up little space. The transmission shaft 70 is basically located at the center of the housing 10. Of course, the transmission shaft 70 may not be set at the center position. The opposite sides of the transmission shaft 70 are the first side and the second side. In addition, the transmission shaft 70 can be a part that passes through all switch units and can control the actions of each switch unit, or each layer can be provided with a separate transmission shaft 70, and the transmission shafts 70 of each layer are linked through a coupling or through a coupling structure.

[0059] As a specific achievable implementation method, the transmission mechanism includes a rotating frame 60 fixed on the transmission shaft 70, a first connecting rod 5a and a second connecting rod 5b respectively hinged to the two ends of the rotating frame 60, the first moving contact 41 and the second moving contact 42 are respectively hinged to the output ends of the first connecting rod 5a and the second connecting rod 5b, and the switch unit is provided with a limiting structure to limit the movement path of the first moving contact 41 and the second moving contact so that they slide along a preset path under the drive of the first connecting rod 5a and the second connecting rod 5b, so as to achieve contact and disconnection with the first static contact 31, the second static contact 32, the third static contact 33 and the fourth static contact 34. The rotating frame 60 is combined with the connecting rod to reduce the internal space of the housing occupied by the transmission mechanism, so as to free up a larger space for setting the arc extinguishing chamber and improve the arc extinguishing effect. At the same time, it is also more conducive to miniaturization of the product. The rotating frame 60 is installed on the transmission shaft 70, and the two ends protrude from the radial direction of the transmission shaft 70. The rotating frame 60 and the transmission shaft 70 can be set as one body or separately and then assembled.

[0060] In this embodiment, the limiting structure includes a first slide rail 103a arranged on the shell 10 and extending from the rotating frame 60 toward the first static contact 31 and the second static contact 32, a second slide rail 103b extending toward the third static contact 33 and the fourth static contact 34, a first slider 802a arranged on the first slide rail 103a, and a second slider 802b arranged on the second slide rail 103b, and the first slider 802a and the second slider 802b are respectively connected to the first moving contact 41 and the second moving contact 42. The first moving contact 41 and the second moving contact 42 are respectively arranged on two supporting members 80. The first slider 802a and the second slider 802b are respectively connected to the first moving contact 41 and the second moving contact 42 as parts of their respective supporting members 80. The first slider 802a and the second slider 802b slide in the first slide rail 103a and the second slide rail 103b respectively to drive the first moving contact 41 and the second moving contact 42 to slide in the first slide rail 103a and the second slide rail 103b respectively. The first slide rail 103a and the second slide rail 103b limit the first slider 802a and the second slider 802b. The sliding direction of the moving contact is limited by the first slide rail 103a and the second slide rail 103b, so as to realize the position control of the output end of the first connecting rod 5a and the second connecting rod 5b, so that the moving contact slides on the slide rail to ensure the effective use of the internal space. Figure 2 As shown, the sliding distance L2 of the moving contact is also the opening distance of the switch. The sliding area of ​​the moving contact in L2 is a straight line area, which occupies very little space.

[0061] For the first moving contact 41 and the second moving contact 42, in order to achieve sliding on the first slide rail 103a and the second slide rail 103b, corresponding sliders (first slider 802a and second slider 802b) are provided to ensure that the sliding is limited.

[0062] In this embodiment, the movable contact 40 slides through the slide rail 103. The slide rail 103 is preferably a linear slide rail, so that the moving contact has a linear motion trajectory, which can occupy a smaller space. The first slide rail 103a is located between the first static contact 31 and the second static contact 32, and the second slide rail 103b is located between the third static contact 33 and the fourth static contact 34.

[0063] However, in some embodiments, for special space design, the slide rail may also be in the form of a curved structure, such as a combination of one arc segment or multiple arc segments.

[0064] In this embodiment, combined with Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the two ends of the rotating frame 60 are respectively provided with a first driving shaft 603 and a second driving shaft 604, the first end of the first connecting rod 5a is provided with a first driving hole 501a, and the first end of the second connecting rod 5b is provided with a second driving hole 501b, and the rotating frame 60 is hinged with the first driving hole 501a of the first connecting rod 5a and the second driving hole 501b of the second connecting rod 5b through the first driving shaft 603 and the second driving shaft 604 respectively.

[0065] In this embodiment, the driving connection parts of the second ends of the first connecting rod 5a and the second connecting rod 5b are the first connecting hole 502a and the second connecting hole 502b. The first connecting rod 5a and the second connecting rod 5b are hinged to the moving contact through a connecting shaft, that is, the first connecting hole 502a and the second connecting hole 502b are respectively hinged to the first moving contact 41 and the second moving contact 42 through the connecting shaft.

[0066] The driving principle of the driving mechanism of this embodiment is as follows:

[0067] The rotating frame 60 and the first link 5a and the second link 5b respectively constitute two two-link mechanisms. The transmission shaft 70 rotates under the drive of the operating mechanism, and at the same time drives the rotating frame 60 to rotate. The rotation of the rotating frame 60 simultaneously drives the first link 5a and the second link 5b to move. The first link 5a and the second link 5b drive the moving contact to move. Since the sliding of the moving contact is restricted by the first slide rail 103a and the second slide rail 103b and can only move along the direction of the slide rail, the movement range of the first link 5a and the second link 5b is also reversely restricted, thereby ensuring the movement range of the two-link mechanism.

[0068] As another specific implementation, Figure 7 As shown, the driving mechanism includes a transmission shaft 70 passing through the housing 10 and a rotating frame 60 transmission-connected to the transmission shaft 70, and the first moving contact 41 and the second moving contact 42 are respectively arranged on both sides of the rotating frame 60, corresponding to the positions of the first static contact 31, the second static contact 32, the third static contact 33 and the fourth static contact 34, respectively.

[0069] Different from the movement mode of the moving contact 40 described above, in this alternative embodiment, the moving contact moves in a circular motion by being directly driven by the rotating frame 60. During the circular motion, the first moving contact 41 can achieve contact with the first static contact 31 and the second static contact 32, and conduct the first static contact 31 and the second static contact 32. Similarly, the movement and conduction principle of the second moving contact 42 is the same. In order to achieve simultaneous contact between the first moving contact 41 and the first static contact 31 and the second static contact 32, the first static contact 31 and the second static contact 32 can be highly offset in the axial direction (axial direction of the transmission shaft 70), and the contact portions 4101 and 4102 at both ends of the first moving contact 41 are offset corresponding to the heights of the first static contact 31 and the second static contact 32, respectively, so that the first static contact 31 and the second static contact 32 can be simultaneously in contact with the contact portions 4101 and 4102.

[0070] Relatively speaking, the circular motion of the moving contact will occupy a larger internal space of the shell, resulting in the volume of the arc extinguishing chamber being compressed, and at the same time, it is not conducive to the miniaturization design of the product.

[0071] refer to Figure 1The housing 10 of the switch unit of the present embodiment is rectangular as a whole. The first static contact 31 and the second static contact 32 are arranged at intervals on the left side and close to the left side wall of the housing 10. The third static contact 33 and the fourth static contact 34 are arranged on the right side and close to the right side wall of the housing 10. The transmission shaft 70 of the driving mechanism is located at the center of the housing 10. The first moving contact 41 is located between the transmission shaft 70 and the left side wall. A first slide rail 103a is provided between the transmission shaft 70 and the left side wall. The first slide rail 103a is parallel to the upper side wall of the housing 10. The driving mechanism drives the first moving contact 41 to slide linearly along the first slide rail 103a toward the left side wall. The two ends cooperate with the first static contact 31 and the second static contact 32 to conduct a circuit. The first moving contact 41 moves along the first slide rail 103a, i.e., the sliding track of the first moving contact 41. Arc extinguishing chambers 20 are provided on both sides, that is, between the first slide rail 103a and the upper side wall of the housing 10, and between the first slide rail 103a and the lower side wall of the housing 10, each having an arc extinguishing chamber 20; the second moving contact 42 is located between the transmission shaft 70 and the right side wall, and a second slide rail 103b is provided between the transmission shaft 70 and the right side wall. The driving mechanism drives the second moving contact 42 to slide linearly along the second slide rail 103b toward the right side wall, and the two ends cooperate with the third static contact 33 and the fourth static contact 34 to conduct another circuit. Arc extinguishing chambers 20 are provided on both sides of the second slide rail 103b, that is, between the second slide rail 103b and the upper side wall of the housing 10, and between the second slide rail 103b and the lower side wall of the housing 10, each having an arc extinguishing chamber 20. The length direction of the first moving contact 41 and the second moving contact 42 is perpendicular to their respective sliding directions. That is, four arc extinguishing chambers 20 are arranged in the rectangular housing 10 . The arc extinguishing chambers are rectangular, and the length of the arc-entry side thereof is substantially consistent with the length of the corresponding slide rail 103 .

[0072] Based on the above embodiments, the present invention can also provide a rotary isolating switch, which includes at least two stacked switch units as described in the above embodiments, and the switch units are linked via a transmission shaft 70.

[0073] Please continue to refer to Figure 2 and Figure 3 The diagram shows the closing and opening states of the switch unit in this embodiment. The diagram shows the structure of two stacked switch units without the housing 10. The switch unit on the upper layer has two circuit switches, and the switch unit on the lower layer has two circuit switches. The two circuit switches in one switch unit are located in the same horizontal space, and the two switch units are stacked in the vertical direction (the axial direction of the transmission shaft 70). Figure 2 , 3As shown, in the closed state, the first moving contact 41 and the second moving contact 42 are in contact with the static contacts on both sides of the housing respectively. In the open state, the first moving contact 41 and the second moving contact 42 are retracted to the outer peripheral area of ​​the transmission shaft 70 and are separated from the static contacts on both sides of the housing respectively. Please continue to refer to Figure 8 As shown, the first moving contact 41, the first stationary contact 31 and the second stationary contact 32 on one side of a switch unit can conduct the circuit I1 after closing, and the other side adopts the same structural design, so the conduction control of the other circuit can also be achieved; the first moving contact 41, the first stationary contact 31 and the second stationary contact 32 on one side of another switch unit can conduct the circuit I2 after closing, and the other side of the other switch unit adopts the same structural design, and the conduction control of the other circuit can also be achieved.

[0074] Based on this, one switch unit of this embodiment can realize the on / off control of two circuits, and has better scalability compared with the traditional rotary isolating switch.

[0075] In this embodiment, the two circuit switches of the switch unit are arranged on the left and right and are located in the same layer space. As other embodiments, the circuit switch composed of the first static contact 31a, the second static contact 32a and the first moving contact 40a in the switch unit is stacked with the circuit switch composed of the third static contact 31b, the fourth static contact 32b and the second moving contact 40b, and the two circuit switches can be independent of each other or connected in series.

[0076] Embodiment 2

[0077] As another alternative implementation, Fig. 9 As shown, the driving mechanism includes: a rotating frame 60, a first connecting rod 5a and a plurality of third connecting rods 5c, wherein the first end of the first connecting rod 5a is hingedly connected to the first end of the rotating frame 60, the second end of the first connecting rod 5a is hingedly connected or fixedly connected to one of the third connecting rods 5c, and the remaining third connecting rods 5c are hingedly connected or fixedly connected to each other in sequence, and the last third connecting rod 5c is provided with the driving connection part, connected to the moving contact 41, and the operating range of the third connecting rod 5c is limited by the limiting retaining wall 57 to ensure that the operating direction of the moving contact 41 is toward the static contact. Among them, the movement of the third connecting rod 5c is limited by the sliding groove to maintain its movement posture. Through the setting of multiple third connecting rods 5c, in some cases, it can make up for the situation that the movement distance of the second connecting rod 5a cannot make the moving contact reach the preset distance. At the same time, it can also reduce the length of the rotating frame and further reduce the occupied space.

[0078] Similarly, if Fig.10As shown, the driving mechanism also includes: a second connecting rod 5b and a plurality of fourth connecting rods 5d, the first end of the second connecting rod 5b is hingedly connected to the second end of the rotating frame 60, the second end of the second connecting rod 5b is hingedly or fixedly connected to one of the fourth connecting rods 5d, and the remaining fourth connecting rods 5d are hingedly or fixedly connected to each other in sequence, and the last fourth connecting rod 5d is provided with the driving connection part, which is connected to the moving contact 42, and the operating range of the third connecting rod 5c is limited by the limit retaining wall 57 to ensure that the operating direction of the moving contact 42 is toward the static contact.

[0079] Embodiment 3

[0080] In this embodiment, if Figure 11a-14 As shown, the moving contact 40 includes: a first moving contact piece 40a and a second moving contact piece 40b, the first moving contact piece 40a and the second moving contact piece 40b are relatively assembled and arranged, and the two ends of the first moving contact piece 40a and the second moving contact piece 40b are respectively provided with bending parts 413 and 414 that are relatively bent outward, and the bending parts 413 and 414 respectively form opening structures 402 and 403, and the opening structures 402 and 403 are used to clamp the contact parts corresponding to the static contact assembly to achieve closing, and the structures of the opening structures 402 and 403 are adapted to the shapes of the static contact assembly (the first static contact 31, the second static contact 32, the third static contact 33 and the fourth static contact 34) so ​​that the two can clamp and contact each other.

[0081] Furthermore, a support member connecting portion 401 is provided in the middle of each of the first moving contact piece 40a and the second moving contact piece 40b for installation and cooperation with the contact connecting portion 803 of the support member 80. The cross-section of the contact connecting portion 803 matches the support member connecting portion 401. The support member connecting portion 401 includes a connecting hole 4011 and a key groove 4012 on the side wall. The moving contact 40 is installed on the contact connecting portion 803 through the support member connecting portion 401, and can be well connected to avoid loosening and rotation of the moving contact 40.

[0082] As another alternative implementation, the stationary contact in the stationary contact assembly may adopt an open structure, while the moving contact may adopt a single-piece structure, and the opening structure of the stationary contact may clamp the contact portion of the moving contact.

[0083] Furthermore, outwardly bent guide edges 4131 and 4141 are provided at the opening structures 402 and 403 of the first moving contact piece 40a and the second moving contact piece 40b, and the guide edges 4131 and 4141 form a flaring structure. The guide edges 4131 and 4141 are arranged in the direction toward the static contact and are located on the side edges of the first moving contact piece 40a and the second moving contact piece 40b. The gap of the flaring structure is larger than the gap of the opening structure, so that the static contact can be smoothly inserted into the opening structures 402 and 403.

[0084] In this embodiment, the outer end edges of the bending portions 413, 414 are further provided with arc-striking edges 4132, 4142 and arc-striking tips 4133, 4143, the arc-striking edges 4132, 4142 are inclined relative to the movement path of the moving contact 40, the arc extinguishing chamber 20 is arranged outside the movement trajectory of the arc-striking tips 4133, 4143 of the moving contact 40, the first ends of the arc-striking edges 4132, 4142 are farther away from the arc extinguishing chamber 20 than the second ends thereof, and the arc-striking tips 4133, 4143 are arranged at the second ends of the arc-striking edges 4132, 4142.

[0085] Further, combined with Fig.12 As shown, both ends of the first moving contact piece 40a and the second moving contact piece 40b are provided with the arc-striking edges 4132, 4142 and arc-striking tips 4133, 4143, the connecting line between the two ends of the first moving contact piece 40a and the second moving contact piece 40b is perpendicular to the movement direction thereof, and arc-extinguishing chambers 20 are provided on the outer sides of the arc-striking tips 4133, 4143 at both ends of the first moving contact piece 40a and the second moving contact piece 40b.

[0086] Further, combined with Fig.13 As shown, the static contact 30 includes a contact body 301 and a contact contact portion 302 extending from the contact body 301 toward the moving contact 40; the contact body 301 is clamped between the arc extinguishing chamber 20 and the side wall of the housing. The static contact 30 is arranged closely to the arc extinguishing chamber 20, so that the entire stroke of the moving contact 40 is protected by the arc extinguishing chamber 20, and the arc can quickly enter the arc extinguishing chamber for arc extinguishing, thereby improving the arc extinguishing effect.

[0087] Further, combined with Fig.14 As shown, the moving contact 40 is mounted on a support member 80 and slidably cooperates with the slide rail 103. The support member 80 includes a slider 802 slidably connected to the slide rail 103, a contact connection portion 803 fixedly connected to the moving contact 40, and a transmission connection portion 801 for transmission connection with a driving mechanism. The support member 80 is integrally formed, the contact connection portion 803 is arranged on the slider 802, and the contact connection portion 803 is arranged on the contact connection portion 803.

[0088] Embodiment 4

[0089] like Figure 15-17 As shown, in this embodiment, the switch unit only includes a driving mechanism, a support member 80 and a moving contact 40, and the stationary contact module only includes a first stationary contact 31 and a second stationary contact 32. Of course, the driving mechanism of this embodiment has the same structure and principle as the driving mechanism of the first embodiment, so it will not be described in detail in the embodiment.

[0090] In this embodiment, the moving contact 40 can slide under the drive of the driving mechanism to contact or separate with the first static contact 31 and the second static contact 32 to achieve conduction or disconnection. The two static contacts 30 (the first static contact 31 and the second static contact 32) and the moving contact 40 form a circuit switch, that is, they play the role of a switch in the circuit. Further, in this embodiment, the sliding of the moving contact 40 is linear sliding, that is, its motion trajectory is a linear motion trajectory.

[0091] In this embodiment, the housing is also provided with a slide rail 103, and the support member 80 includes a slider 802 slidably connected to the slide rail 103, a contact connection portion 803 fixedly connected to the moving contact 40, and a transmission connection portion 801 for transmission connection with the driving mechanism; the slide rail 103 extends from a position adjacent to the driving mechanism toward the direction of the stationary contact module and is adjacent to the stationary contact module. The moving contact 40 can move along the slide rail 103 under the drive of the driving mechanism to contact with the first stationary contact 31 and the second stationary contact 32 or move away from the stationary contact.

[0092] In this embodiment, the first static contact 31 and the second static contact 32 are arranged at intervals on the first side of the housing 10, and the moving contact 40 and the drive mechanism are arranged on the second side of the housing 10 of the switch unit, so that the setting space of the arc extinguishing chamber can be maximized, and the opening distance between the static contact and the moving contact can be maximized. Figure 1 As shown, the first static contact 31 and the second static contact 32 are arranged near the first side wall 101 of the shell 10, basically close to the side wall of the first side, the driving mechanism is arranged near the second side wall 102, basically close to the side wall of the second side, and the slide rail 103 extends from the driving mechanism to the first side wall 101 in a direction perpendicular to the second side wall 102 to maximize the opening distance, and two arc extinguishing chambers are respectively arranged on both sides of the slide rail 103 to maximize the arc extinguishing chamber.

[0093] Combination Fig.16 and Fig.17 As shown, the slide rail 103 is formed by two parallel retaining walls 1030 arranged on the bottom surface of the housing 10; the slide rail 103 extends from the second side of the housing 10 to the first side edge of the housing 10, adjacent to the first static contact 31 and the second static contact 32. The moving contact 40 can slide linearly along the slide rail 103 under the drive of the contact driving mechanism. The retaining wall 1030 can be a raised rib or a side wall of a slide groove. The support member 80 of the moving contact 40 is provided with a slider 802, and the moving contact 40 slides in the slide rail 103 through the slider 802.

[0094] In this embodiment, a slide surface 1031 is provided on the top of the retaining wall 1030, and the movable contact 40 is provided with a support surface 411, and the support surface 411 is placed on the slide surface 1031, and the movable contact 40 slides on the slide surface 1031 through the support surface 411. The slider 802 can be lifted or the friction of the slider 802 can be reduced by contacting the support surface 411 with the slide surface 1031 on the retaining wall 1030. The sliding of the slider 802 is only limited by the two inner side walls of the retaining wall, and the main friction force is generated by the contact surface between the support surface 411 and the retaining wall 1030, and the contact area can be set smaller than that of the slider, and the sliding friction force is smaller, so that the sliding of the movable contact 40 is smoother.

[0095] Embodiment 5

[0096] Based on the above embodiments, this embodiment provides a rotary isolating switch, including an operating unit and at least one switch unit, which are stacked, each switch unit including a contact module, the contact module including a moving contact, two stationary contacts cooperating with the corresponding moving contact, and a contact driving mechanism, the moving contact and the two stationary contacts constitute a loop switch, the operating unit is provided with an output shaft, the output shaft is connected to the contact driving mechanism of the switch unit, and the contact driving mechanisms of adjacent switch units are connected, the output shaft rotates to drive the contact driving mechanism to move, the contact driving mechanism drives the moving contact to contact or disengage with the two stationary contacts at the same time, so as to realize the closing and opening of the switch unit.

[0097] refer to Figure 18a-22 As shown, the rotary isolating switch of this embodiment includes an operating unit (not shown in the figure) and at least two switch units, and the operating unit and the at least two switch units are stacked. Figure 1 The internal structure of two switch units is shown, and the two switch units are respectively a first switch unit L1 and a second switch unit L2. Figure 2 The structure of two switch units with a housing is shown. The two switch units are stacked and the upper cover of the first housing 1a of the upper first switch unit L1 is removed. Fig.20a An example with three switch units is shown, namely the first switch unit L1, the second switch unit L2 and the third switch unit L3. The contact modules of each switch unit constitute the contact system of the rotary disconnector. The structure of each switch unit can be the same or different. Usually, the switch units of the same rotary disconnector have the same structure.

[0098] like Fig.18a As shown, a contact system provided in this embodiment includes at least two contact modules respectively arranged in two switch units. In this embodiment, the two contact modules are a first contact module arranged in the first switch unit L1 and a second contact module arranged in the second switch unit L2.

[0099] In this embodiment, the first contact module includes: a first moving contact 40a, a first stationary contact 31a and a second stationary contact 32a. The first moving contact 40a simultaneously contacts or disengages with the first stationary contact 31a and the second stationary contact 32a by sliding to achieve conduction and disconnection of the first stationary contact 31a and the second stationary contact 32a.

[0100] In this embodiment, the second contact module includes: a second moving contact 40b, a third stationary contact 31b, and a fourth stationary contact 32b. The second moving contact 40b simultaneously contacts or disengages from the third stationary contact 31b and the fourth stationary contact 32b by sliding to achieve conduction and disconnection of the third stationary contact 31b and the fourth stationary contact 32b.

[0101] Among them, one of the first static contact 31a and the second static contact 32a is electrically connected to one of the third static contact 31b and the fourth static contact 32b to realize the series connection of the first switch unit L1 and the second switch unit L2; the first moving contact 40a, the first static contact 31a, the second static contact 32a, the second moving contact 40b, the third static contact 31b, and the fourth static contact 32b form a double breakpoint circuit switch.

[0102] Based on this embodiment, the first switch unit L1 and the second switch unit L2 are connected in series to form a whole, which is equivalent to forming a new independent complete switch unit with a circuit breaking function after the first switch unit L1 and the second switch unit L2 are connected in series. The switch unit includes the first switch unit L1 and the second switch unit L2. The first switch unit L1 and the second switch unit L2 can be integrated in one housing, or they can use independent housing structures.

[0103] Of course, after the first switch unit L1 and the second switch unit L2 are connected in series as a whole, they can still be connected in series with other switch units to form a multi-breakpoint switch.

[0104] In the contact system of this embodiment, the contact modules between adjacent switch units are connected in series with the static contacts, so as to realize the series connection between at least one circuit switch of the first switch unit L1 and at least one circuit switch of the second switch unit L2. That is, at least one circuit switch of a switch unit is connected in series with at least one circuit switch of another adjacent switch unit. After the double circuit or multiple circuits are connected in series, when the given voltage and current are disconnected, the number of breakpoints increases while the breakpoint distance of the entire circuit increases. At the same time, since it is a series connection between switch units, the number of arc extinguishing devices (or arc extinguishing chambers) is increased, which is more conducive to breaking the arc. In addition, this series connection method makes the circuit design more free, and the series-connected switch units can be used to connect or control special circuits according to different needs. For example, by connecting the switch units in series, the wiring direction and the output direction can be adjusted, so that the wiring design has a higher degree of freedom. For example, under given voltage and current conditions, a single-layer single-side circuit can meet its electrical performance requirements, and the wiring capacity (number of circuits) of the same product is 16. Under another given voltage and current condition, two circuits must be connected in series to meet its electrical performance requirements. The wiring capacity (number of circuits) of the same product is half of that in Example 1, that is, 8 main circuits. Based on this, higher electrical performance can be achieved by connecting more switch units in series.

[0105] In this embodiment, the structure and layout of the first switch unit L1 and the second switch unit L2 are the same, that is, the structure of the first contact module and the second contact module are the same. Fig.18a and Fig.18b As shown, taking the first switch unit L1 as an example, the first static contact 31a and the second static contact 32a are arranged in the first housing 1a of the first switch unit L1, and the first static contact 31a and the second static contact 32a are connected by contacting with the first moving contact 40a, or the first static contact 31a and the second static contact 32a are disconnected by being separated from the first moving contact 40a, and the first static contact 31a, the second static contact 32a and the first moving contact 40a form a circuit switch, and the first static contact 31a and the second static contact 32a are used to connect the power supply and the load respectively, and can work independently. The structure of the second switch unit L2 is similar, and the third static contact 31b, the fourth static contact 32b and the second moving contact 40b form a circuit switch, and the third static contact 31b and the fourth static contact 32b are used to connect the power supply and the load respectively, and can work independently.

[0106] The present application realizes the series connection of the first switch unit L1 and the second switch unit L2 by electrically connecting one of the first static contact 31a and the second static contact 32a with one of the third static contact 31b and the fourth static contact 32b, and the first moving contact 40a, the first static contact 31a, the second static contact 32a, the second moving contact 40b, the third static contact 31b, and the fourth static contact 32b form a new double-break circuit switch for synchronous closing and opening. It should be noted that the static contact in the third switch unit L3 is also electrically connected to the static contact of the second switch unit L2, that is, the static contacts of the first switch unit L1, the second switch unit L2 and the third switch unit L3 are connected in series in sequence, which also belongs to the protection scope of the present application and has the structural feature that the static contacts of the two switch units are electrically connected.

[0107] Please refer to Figure 18a-22 As shown, in this embodiment, the contact module of each switch unit includes two moving contacts and four stationary contacts. One moving contact and two stationary contacts cooperate to form a switch circuit, and two switch circuits are formed in each switch unit. The driving mechanism of the contact module drives the two moving contacts to move at the same time, so that each moving contact cooperates with the corresponding two stationary contacts to turn on and off the corresponding switch circuit. Preferably, in this embodiment, the driving mechanism drives the two moving contacts to slide linearly at the same time, so that each moving contact cooperates with the corresponding two stationary contacts.

[0108] In this embodiment, the first contact module in the first housing 1a of the first switch unit L1 includes two first moving contacts 40a, two first static contacts 31a and two second static contacts 32a, forming two independent circuit switches in the first housing 1a of the first switch unit L1, one circuit switch is arranged on the first side of the first housing 1a, and the other circuit switch is arranged on the second side of the first housing 1a, and the two circuit switches in the first housing 1a are symmetrically arranged. Similarly, the second contact module in the second housing 1b of the second switch unit L2 includes two second moving contacts 40b, two third static contacts 31b, and two fourth static contacts 32b, forming two independent circuit switches in the second housing 1b of the second switch unit L2, one circuit switch is arranged on the first side of the second housing 1b, and the other circuit switch is arranged on the second side of the second housing 1b, and the two circuit switches in the second housing 1b are symmetrically arranged. Of course, as other embodiments, only one first moving contact 40a, one first static contact 31a and one second static contact 32a can be arranged in the first switch unit L1.

[0109] In this embodiment, at least one circuit switch in the first switch unit L1 is connected in series with the circuit switch in the second switch unit L2 to form a double-break circuit switch. For example, when two first moving contacts 40a, two first static contacts 31a, two second static contacts 32a, two second moving contacts 40b, two third static contacts 31b, and two fourth static contacts 32b are arranged in groups on opposite sides, the static contacts on both sides are connected in series, that is, the two circuit switches in the first switch unit L1 are connected in series with the two circuit switches in the second switch unit L2 to form two double-break circuit switches. In this way, the first switch unit L1 after the series connection is combined with the second switch unit L2 to achieve control of at least two circuits. The static contacts on one side may be connected in series, while those on the other side may not be connected in series, that is, only one of the two circuit switches in the first switch unit L1 is connected in series with one of the two circuit switches in the second switch unit L2. At this time, the first switch unit L1 combined with the second switch unit L2 can achieve control of three circuits.

[0110] In this embodiment, please combine Fig.18a and Fig.18b As shown, a first static contact 31a and a second static contact 32a of one of the circuit switches formed in the first switch unit L1 are located on the first side of the first shell 1a, and a first static contact 31a and a second static contact 32a of the other circuit switch are located on the second side of the first shell 1a; a third static contact 31b and a fourth static contact 32b of one of the circuit switches formed in the second switch unit L2 are located on the first side of the second shell 1b, and a third static contact 31b and a fourth static contact 32b of the other circuit switch are located on the second side of the second shell 1b, and the second shell 1b is arranged below the first shell 1a, the first side of the first shell 1a and the first side of the second shell 1b belong to the same side, and the second side of the first shell 1a and the second side of the second shell 1b belong to the same side.

[0111] Preferably, one of the first static contact 31a and the second static contact 32a located on the first side in the first housing 1a is electrically connected to one of the third static contact 31b and the fourth static contact 32b located on the first side in the second housing 1b; and / or, one of the first static contact 31a and the second static contact 32a located on the second side in the first housing 1a is electrically connected to one of the third static contact 31b and the fourth static contact 32b located on the second side in the second housing 1b. Of course, as other inferior embodiments, one of the first static contact 31a and the second static contact 32a located on the first side in the first housing 1a may be electrically connected to one of the third static contact 31b and the fourth static contact 32b located on the second side in the second housing 1b.

[0112] refer to Figure 1 and Figure 2 When there is only one first static contact 31a, one second static contact 32a and one first moving contact 40a in the first housing 1a, and there is only one third static contact 31b, one fourth static contact 32b and one second moving contact 40b in the second housing 1b, it is preferred that the first static contact 31a and the second static contact 32a are arranged on the first side of the first housing 1a of the first switch unit L1, and the third static contact 31b and the fourth static contact 32b are arranged on the first side of the second housing 1b of the second switch unit L2; the first side of the first housing 1a and the first side of the second housing 1b belong to the same side. The second housing 1b is arranged below the first housing 1a, the third static contact 31b is located below the first static contact 31a, and the fourth static contact 32b is located below the second static contact 32a.

[0113] At the same time, as an alternative embodiment, the first static contact 31a and the second static contact 32a are arranged on the first side of the first housing 1a of the first switch unit L1, and the third static contact 31b and the fourth static contact 32b are arranged on the second side of the second housing 1b of the second switch unit L2; the first side of the first housing 1a and the second side of the second housing 1b belong to different sides, for example, they can be opposite sides, or adjacent sides, no matter opposite sides or adjacent sides, they can be connected in series inside the housing through a series conductor, or a wiring part can be set outside the housing to realize the connection in series outside the housing. If the connection is in series inside the housing, it is necessary to set a corresponding structural support inside the housing to avoid short circuit and other situations.

[0114] Preferably, a structure in which one of the first and second stationary contacts 31a and 32a is electrically connected to one of the third and fourth stationary contacts 31b and 32b is disposed in the first housing 1a of the first switch unit L1 and the second housing 1b of the second switch unit L2.

[0115] As a specific implementation, one of the first stationary contact 31a and the second stationary contact 32a and one of the third stationary contact 31b and the fourth stationary contact 32b are electrically connected via a series conductor 91 extending from the first housing 1a to the second housing 1b. Fig.18a As shown, the second static contact 32a and the third static contact 31b are electrically connected through a series conductor 91 that passes through the first housing 1a to the second housing 1b. Fig.18bAs shown, when the first static contact 31a, the second static contact 32a, the third static contact 31b and the fourth static contact 32b are all on the same side, and the third static contact 31b is below the first static contact 31a, and the fourth static contact 32b is below the second static contact 32a, after the second static contact 32a and the third static contact 31b are connected in series, the current I1 enters from the first static contact 31a, passes through the second static contact 32a and the third static contact 31b in sequence, and finally flows out from the fourth static contact 32b. Therefore, the wiring direction can be set with reference to the direction of the arrow in the figure, that is, the incoming line direction enters from one end of this side and exits from the other end.

[0116] For details, please refer to Fig.19 As shown, the first side of the first housing 1a and / or the second housing 1b is provided with a through hole 123, and the series conductor 91 is passed through the first housing 1a to the second housing 1b through the through hole 123, and is connected to the third static contact 31b. Usually, the second housing 1b is provided with an upper cover, and corresponding through holes 123 are provided on both housings. If the second housing 1b is not provided with an upper cover or there is only one partition between the first housing 1a and the second housing 1b, there is only one through hole 123.

[0117] As another specific implementation, preferably, one of the first stationary contact 31a and the second stationary contact 32a and one of the third stationary contact 31b and the fourth stationary contact 32b are integrally formed. Fig.20a As shown, the second static contact 32a and the fourth static contact 32b are integrally formed and are arranged from the first housing 1a to the second housing 1b. When the fourth static contact 32b of the integrally formed structure is adopted, the assembly process requires the two units to be assembled at the same time, but at the same time, the fourth static contact 32b of the integrally formed structure reduces the number of product parts and the assembly procedures. Please continue to refer to Fig.20b As shown, when the first static contact 31a, the second static contact 32a, the third static contact 31b and the fourth static contact 32b are all on the same side, and the third static contact 31b is below the first static contact 31a, and the fourth static contact 32b is below the second static contact 32a, after the second static contact 32a and the fourth static contact 32b (integrally formed) are connected in series, the current I1 enters from the first static contact 31a, passes through the second static contact 32a and the fourth static contact 32b in sequence, and finally flows out from the third static contact 31b. Therefore, the wiring direction can be set with reference to the direction of the arrow in the figure, that is, the wiring direction enters from one end of the side and exits from the same end of the side, that is, the wiring enters and exits on the same side, and the wiring enters and exits on the adjacent sides can also be realized.

[0118] Of course, in this embodiment, the second stationary contact 32a and the fourth stationary contact 32b can also be electrically connected through a series conductor, and the connection method of the series conductor can refer to the connection method of the second stationary contact 32a and the third stationary contact 31b mentioned above.

[0119] In the above embodiments, the serial connection between the static contacts is realized in the housing, but is not limited to the method realized in the housing. That is, the structure in which one of the first static contact 31a and the second static contact 32a is electrically connected to one of the third static contact 31b and the fourth static contact 32b is located outside the first housing 1a of the first switch unit L1 and the second housing 1b of the second switch unit L2. For example, Figure 4 As shown, the second static contact 32a is provided with a second wiring portion 3212 passing through the first shell 1a of the first switch unit L1, and the third static contact 31b is provided with a third wiring portion 3113 passing through the second shell 1b of the second switch unit L2, and the second wiring portion 3212 and the third wiring portion 3113 are electrically connected outside the first shell 1a and the second shell 1b.

[0120] In another embodiment, if Fig.21 As shown, the second static contact 32a is provided with a second wiring portion 3212 passing through the first shell 1a of the first switch unit L1, and the fourth static contact 32b is provided with a fourth wiring portion 3214 passing through the second shell 1b of the second switch unit L2, and the second wiring portion 3212 and the third wiring portion 3314 are electrically connected outside the first shell 1a and the second shell 1b.

[0121] For further reference, Figure 1 As shown, the driving mechanism of the switch unit in this embodiment includes a rotatable transmission shaft 70, a rotating frame 60 fixed on the transmission shaft 70, a first connecting rod 5a and a second connecting rod 5b hinged to both ends of the rotating frame 60, and the first connecting rod 5a and the second connecting rod 5b are respectively hinged to two moving contacts. The transmission shaft 70 rotates through the first connecting rod 5a and the second connecting rod 5b to drive the two moving contacts to slide linearly along the corresponding slide rail 103a, so that each moving contact 40a cooperates with the corresponding two static contacts. In this embodiment, arc extinguishing chambers 20 are respectively arranged on both sides of the slide rail 103a. Compared with the traditional switch unit structure, the arc extinguishing chamber is based on the square switch unit housing structure, and the arc extinguishing chamber structure is rectangular, with a larger arc extinguishing chamber structure.

[0122] Please continue to refer to Fig.18a and Fig.18bAs a specific serial connection mode, the first static contact 31a and the second static contact 32a are arranged on the first side of the first housing 1a of the first switch unit L1, and the third static contact 31b and the fourth static contact 32b are arranged on the first side of the second housing 1b of the second switch unit L2; the first side of the first housing 1a and the first side of the second housing 1b are the same side, the third static contact 31b is arranged below the first static contact 31a, and the fourth static contact 32b is arranged below the second static contact 32a; the second static contact 32a is electrically connected to the third static contact 31b to realize the serial connection of the first switch unit L1 and the second switch unit L2, and the line inlet terminal of the double break switch after serial connection is arranged at one end of the first static contact 31a, and the wiring terminal is arranged at one end of the fourth static contact 32b. That is to say, after serial connection, the original wiring direction is not changed, and it is still at the opposite side, so that the wiring direction of the existing switch unit is not changed, and the wiring applicability of the switch unit is guaranteed.

[0123] Please continue to refer to Fig.20a and Fig.20b As a series connection method, the first static contact 31a, the second static contact 32a, the third static contact 31b, and the fourth static contact 32b are all arranged on the first side of the rotary disconnector and are arranged near the two ends of the side; the third static contact 31b is arranged below the first static contact 31a, and the fourth static contact 32b is arranged below the second static contact 32a; the second static contact 32a is electrically connected to the fourth static contact 32b to realize the series connection of the first switch unit L1 and the second switch unit L2, the incoming line terminal is arranged at one end of the first static contact 31a, and the wiring terminal is arranged at one end of the second static contact 31b, that is, the incoming line terminal and the wiring terminal are at the same end of the first side, or they can also be on adjacent sides, and the wiring method is more flexible.

[0124] Thus, the first moving contact 40a, the first static contact 31a, the second static contact 32a, the second moving contact 40b, the third static contact 31b, and the fourth static contact 32b of the present embodiment form a double-breakpoint circuit switch. Of course, under certain current and voltage conditions, if two layers of switch units cannot meet the breaking requirements, the third switch unit or the fourth switch unit or even more layers can be connected in series.

[0125] Under some application conditions, the operating parameters of the various switch units of the rotary disconnector can be the same or different. Through multi-layer series connection, a wider range of parameter operation can be achieved.

[0126] To achieve specific wiring position requirements or specific operating parameters, the first switch unit L1 and the second switch unit L2 may be two adjacent switch units, or two switch units separated by at least one layer.

[0127] Embodiment 6

[0128] like Fig. 22 The figure shows a schematic diagram of the internal structure of a rotary isolating switch. The rotary isolating switch includes a plurality of switch units, such as a switch unit L1 and a switch unit L2. The present embodiment is described by taking the switch unit L1 as an example. In this embodiment, the switch unit L1 includes both a first contact module and a second contact module, the first contact module includes: a first moving contact 40a, a first static contact 31, and a second static contact 32, the first static contact 31, the second static contact 32 and the first moving contact 40a constitute a first circuit switch, the first moving contact 40a is used to simultaneously contact or disengage with the first static contact 31 and the second static contact 32 to achieve the conduction and disconnection of the first static contact 31 and the second static contact 32; the second contact module includes: a second moving contact 40b, a third static contact 33 and a fourth static contact 34, the third static contact 33, the fourth static contact 34 and the second moving contact 40b constitute a second circuit switch, the second moving contact 40b is used to simultaneously contact or disengage with the third static contact 33 and the fourth static contact 34 to achieve the conduction and disconnection of the third static contact 33 and the fourth static contact 34. It can be seen from this that the first circuit switch and the second circuit switch are two independent circuit switches, and the first contact module or the second contact module can independently realize the function of a circuit switch.

[0129] In this embodiment, one of the first static contact 31 and the second static contact 32 is electrically connected to one of the third static contact 33 and the fourth static contact 34 so that the first circuit switch and the second circuit switch are connected in series. The first circuit switch and the second circuit switch are connected in series to form a double breakpoint switch structure for controlling the breaking of a circuit.

[0130] In this embodiment, the first static contact 31 and the second static contact 32 are arranged on the first side of the housing 1 of the first switch unit L1, and the third static contact 33 and the fourth static contact 34 are arranged on the second side of the housing 1. The first side and the second side may be opposite sides or adjacent sides. Of course, in some possible embodiments, the first side and the second side may also be the same side (that is, the first contact module and the second contact module are arranged in sequence on the same side).

[0131] Please continue to refer to Fig. 22 As shown, the first side and the second side are opposite sides, and the second static contact 32 and the fourth static contact 34 are electrically connected to realize the first contact module and the second contact module are connected in series. The first static contact 31 and the third static contact 33 are arranged opposite to each other, and the second static contact 32 and the fourth static contact 34 are arranged opposite to each other. Fig. 22The middle arrow indicates the direction of current. When the second stationary contact 32 and the fourth stationary contact 34 are electrically connected in series, external wiring is provided on the first stationary contact 31 and the third stationary contact 33, so that the power supply and the load can be connected on the same side.

[0132] As an alternative embodiment, the second static contact 32 is electrically connected to the third static contact 33. In this case, the external wiring is arranged on the first static contact 31 and the fourth static contact 34, so that the power supply can be connected from one side and the load can be connected from the other side, and the directions of connecting the power supply and the load are opposite.

[0133] like Fig. 22 As shown, combined with Figure 1 , the electrical connection structure of the first contact module and the second contact module is arranged in the housing 10. Specifically, the second static contact 32 of the first contact module and the third static contact 33 of the second contact module are connected through the connection conductor 91 arranged in the housing 10. To ensure the reliability of the connection conductor 91, an auxiliary structure for fixing the connection conductor 91, such as a wiring trough, a line card and other structures, can be arranged in the housing 10.

[0134] like Fig.23 As shown, the second stationary contact and the third stationary contact 33 may also be an integrally formed structure having a connecting portion 91 a , and the integrally formed structure is disposed inside the housing 10 .

[0135] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0136] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A switch unit, comprising: A housing (10), a moving contact module, and a stationary contact module; characterized in that: The moving contact module comprises a driving mechanism and at least two mutually independent moving contacts (40), and the stationary contact module comprises at least four stationary contacts (30); Wherein, every two stationary contacts (30) are in contact with or separated from a moving contact (40) to achieve conduction or disconnection, and the two stationary contacts (30) and the moving contact (40) form a loop switch.

2. The switch unit according to claim 1, characterized in that: The moving contact module (4) comprises: a first moving contact (41) and a second moving contact (42) which are independent of each other; The stationary contact module (3) comprises: a first stationary contact (31), a second stationary contact (32), a third stationary contact (33) and a fourth stationary contact (34); The first stationary contact (31) and the second stationary contact (32) form a circuit switch with the first moving contact (41), and the third stationary contact (33) and the fourth stationary contact (34) form a circuit switch with the second moving contact (42).

3. The switch unit according to claim 2, characterized in that: The first stationary contact (31) and the second stationary contact (32) are arranged at a first side of the housing (10) in an interval manner, and the third stationary contact (33) and the fourth stationary contact (34) are arranged at a second side opposite to the first side in an interval manner; The first moving contact (41) and the second moving contact (42) are arranged between the first side and the second side.

4. The switch unit according to claim 2, characterized in that: The driving mechanism comprises a rotatably arranged transmission shaft (70) and a transmission mechanism transmission-connected to the transmission shaft (70); the first moving contact (41) and the second moving contact (42) are respectively connected to output ends of the transmission mechanism.

5. The switch unit according to claim 4, characterized in that: The transmission mechanism comprises a rotating frame (60) fixed on the transmission shaft (70), a first connecting rod (5a) and a second connecting rod (5b) respectively hinged to the rotating frame (60); the first moving contact (41) and the second moving contact (42) are respectively hinged to the output ends of the first connecting rod (5a) and the second connecting rod (5b); the switch unit is provided with a limiting structure for limiting the movement path of the first moving contact (41) and the second moving contact (42) so that the first moving contact (41) and the second moving contact (42) slide along a preset path under the drive of the first connecting rod (5a) and the second connecting rod (5b), thereby realizing contact and separation with the first stationary contact (31), the second stationary contact (32), the third stationary contact (33) and the fourth stationary contact (34).

6. The switch unit according to claim 5, characterized in that: The limiting structure comprises a first slide rail (103a) arranged on the housing (1) and extending from the rotating frame (60) toward the first static contact (31) and the second static contact (32), a second slide rail (103b) extending toward the third static contact (33) and the fourth static contact (34), a first slider (802a) arranged on the first slide rail (103a), and a second slider (802b) arranged on the second slide rail (103b), the first slider (802a) and the second slider (802b) being connected to the first moving contact (41) and the second moving contact (42), respectively.

7. The switch unit according to claim 5, characterized in that: The rotating frame (60) is provided with a first driving shaft (603) and a second driving shaft (604) on two radially opposite sides, the first end of the first connecting rod (5a) is provided with a first driving hole (501a), and the first end of the second connecting rod (5b) is provided with a second driving hole (501b), and the rotating frame (60) is hinged to the first driving hole (501a) of the first connecting rod (5a) and the second driving hole (501b) of the second connecting rod (5b) through the first driving shaft (603) and the second driving shaft (604), respectively.

8. The switch unit according to claim 7, characterized in that: The second ends of the first connecting rod (5a) and the second connecting rod (5b) are respectively provided with a first connecting hole (502a) and a second connecting hole (502b); the first connecting rod (5a) and the second connecting rod (5b) are respectively hinged to the first moving contact (41) and the second moving contact (42) through the first connecting hole (502a) and the second connecting hole (502b).

9. The switch unit according to claim 2, characterized in that: The driving mechanism comprises a transmission shaft (70) and a rotating frame (60) drivingly connected to the transmission shaft (70); the first moving contact (41) and the second moving contact (42) are respectively arranged on both sides of the rotating frame (60), corresponding to the positions of the first static contact (31), the second static contact (32), the third static contact (33) and the fourth static contact (34), respectively.

10. A rotary isolating switch, characterized in that: It comprises at least two stacked switch units as described in any one of claims 1-9.

Images