Operating mechanism of switch

Abstract

The invention belongs to the technical field of low-voltage electric appliances, and relates to a switch operating mechanism which comprises a limiting part arranged on the inner wall of a shell, the limiting part comprises a transition section and an elastic protruding section which are connected, the transition section is connected with the inner wall of the shell, and the elastic protruding section elastically protrudes out of the inner wall of the shell. When the top operation wheel drives the sliding block assembly to transversely slide, the elastic protruding section can abut against the sliding block assembly in a limiting mode. When the sliding block assembly transversely slides to trigger the clamping plate to rotate, the far end of the clamping plate passes through the transition section, abuts against the elastic protruding section and is opened outwards, and the top operation wheel can drive the sliding block assembly to further transversely slide through the elastic protruding section. Compared with the prior art, visual feedback of the switch fault state is realized, and personal injury caused by misjudgment of an operator on the switch state is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage electrical appliances and relates to an operating mechanism of a switch. Background Art

[0002] With the introduction of new DC high-voltage disconnectors into the market, high requirements are placed on the closing and opening speeds of disconnectors. The operating mechanism of the disconnector determines the closing and opening speeds of the disconnector. Currently, the operating mechanism of the disconnector on the market uses a hard transmission method between the output follower and the input active member. For example, CN217588787U discloses an operating mechanism for a disconnector. Figure 4 In the operating mechanism shown, axis a and axis b are the rotating axes of the input active member, 200 and 300 are the input active members. When one of them is rotated by the operator, the output follower 300 on the other side will rotate together with the input active member. The output follower 300 is connected to the contact module. The rotation speed of the output follower is the closing and opening speed of the disconnector. Therefore, the closing and opening speed of the contact depends on the rotation speed of the input active member operated by the operator, which will greatly reduce the arc extinguishing effect during closing and opening.

[0003] Based on the above problems, Chinese patent application CN202311693667.X discloses an operating mechanism for an isolating switch, comprising a housing with a cavity inside, a second gear rotatably arranged in the cavity, a top operating wheel for driving the second gear to rotate, a splint arranged to rotate coaxially with the second gear, an output follower connected to the splint in a transmission manner, and a spring assembly; one end of the spring assembly is connected to the second gear and is eccentrically arranged relative to the rotating shaft of the second gear, and the other end is connected to the outer end of the splint, so that when the input active member drives the second gear to rotate in the forward direction, the spring assembly is first compressed until the eccentrically arranged end crosses the line connecting the other end and the rotating shaft of the second gear, after which the elastic potential energy of the spring assembly is released and pushes the splint to drive the output follower to rotate in the opposite direction. This technical solution adopts a flexible transmission between the input active member and the output follower, so that the speed of the mechanism's closing and opening is not dependent on manual operation, thereby speeding up the closing and opening speed. However, after the operating mechanism is closed, when the contacts are subjected to a large current shock, the contacts are welded, causing the splint to jam. The top operating wheel and the side operating wheel are input active parts. When the operator rotates one of them to open the switch, the slider assembly slides to the left only under the influence of the flexible force of the spring force, and the shaft continues to rotate unaffected, driving the spring assembly past the dead point. At this time, the input active part indicates that the switch is open, but the contacts are still in the closed state due to welding and jamming, causing the operator to misread and create a safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to provide an operating mechanism for a switch. By adding an elastic limiter to the slider assembly, the rack cannot slide normally when the splint is stuck, and the top operating wheel and the side operating wheel cannot point to the opening position, so that the operator can be aware of the switch failure during the opening operation.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A switch operating mechanism includes a housing, a top operating wheel, a first gear, a slider assembly, a second gear, a rotating transmission member, an output follower, and a spring assembly. The slider assembly includes a second rack, and the rotating transmission member includes a clamping plate. The clamping plate is provided on a side of the housing near the inner wall relative to the second rack.

[0007] The operating mechanism also includes a limiting member provided on the inner wall of the housing.

[0008] The limiting member includes a transition section and an elastic protruding section connected to each other, wherein the transition section is connected to the inner wall of the shell, and the elastic protruding section elastically protrudes from the inner wall of the shell so that

[0009] When the top operating wheel drives the slider assembly to slide horizontally, the elastic protruding section can abut against the slider assembly in a limited position;

[0010] When the slider assembly slides laterally to trigger the splint to rotate, the distal end of the splint passes through the transition section, abuts against the elastic protruding section and stretches outward, so that the top operating wheel can drive the slider assembly to further slide laterally through the elastic protruding section.

[0011] As a preferred technical solution, the elastic displacement direction of the elastic protruding section is perpendicular to the lateral displacement direction of the slider assembly.

[0012] Furthermore, the limiting members are symmetrically arranged on opposite inner walls of the shell.

[0013] Furthermore, a limiting protrusion is provided on the outer wall of the distal end of the splint, and when the splint is rotated to open the elastic protruding section outward, the elastic protruding section can be in limiting contact with the limiting protrusion.

[0014] Furthermore, the limiting member is an elastic material limiting member, one end of the transition section is fixedly connected to the inner wall of the shell, and the other end is connected to the elastic protruding section.

[0015] As a preferred technical solution, the elastic material is stainless steel or manganese steel, or elastic plastic, etc.

[0016] Furthermore, the elastic protruding section has an outwardly convex arc surface structure.

[0017] As a preferred technical solution, one end of the transition section is fixed to the inner wall of the shell by screws.

[0018] Furthermore, the transition section is an inclined plate, and one end of the plate is hinged to the inner wall of the shell;

[0019] The elastic protruding section includes an abutting plate connected to the inclined plate, and an elastic telescopic member arranged between the abutting plate and the inner wall of the shell.

[0020] Furthermore, the elastic telescopic member is a spring.

[0021] Furthermore, a slide groove is provided on the inner wall of the housing, and the limiting member is slidably connected in the slide groove.

[0022] The transition section includes an inclined plate, and the elastic protruding section includes an abutting plate connected to the inclined plate, and an elastic telescopic member provided between the abutting plate and the inner wall of the shell.

[0023] Furthermore, the transition section further comprises a straight plate, one end of which is connected to the inclined plate, and the other end of which is in sliding contact with the inner wall of the chute;

[0024] One end of the abutment plate is connected to the inclined plate, and the other end is in sliding abutment with the inner wall of the chute.

[0025] Furthermore, the elastic telescopic member is a spring.

[0026] When the isolating switch is working normally, the top operating wheel can drive the slider assembly to slide horizontally until the trigger plate rotates. At this time, the far end of the plate passes through the transition section, abuts against the elastic protruding section and stretches outward, so that the top operating wheel can drive the slider assembly to slide horizontally through the elastic protruding section. At this time, the rotation angle of the top operating wheel indicates that the switch is open.

[0027] When the contacts are subjected to a high current surge and weld, the clamping plate becomes stuck, preventing it from rotating and thus from expanding the elastic protrusion. As the top operating wheel drives the slider assembly laterally, the elastic protrusion abuts against the slider assembly. At this point, the top operating wheel's rotation angle indicates a closed state and a faulty switch.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a limiter on the rotation path of the clamp plate that can interfere with the lateral sliding distance of the slider assembly, and utilizes the characteristics that the lateral sliding distance of the slider assembly is related to the rotation angle of the top operating wheel, and whether the clamp plate can rotate freely in the fault state and the non-fault state of the contact welding and jamming, to achieve intuitive feedback on the switch fault state, thereby avoiding personal injury caused by the operator's misjudgment of the switch state.

[0030] Specifically, in a non-fault state, the clamping plate rotates under the action of the lateral sliding of the slider assembly, pushing the elastic protrusion on the limiter outward, allowing the slider assembly to slide smoothly to the far end. The rotation angle of the top operating wheel indicates that the switch is open. In a fault state, the clamping plate cannot rotate freely, the elastic protrusion cannot be pushed outward, and interferes with the limit of the lateral sliding slider assembly. The rotation angle of the top operating wheel indicates that the switch is closed and the switch is in a fault state. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 、 Figure 7 This is a schematic diagram of the three-dimensional structure of an operating mechanism of a switch in Example 1 (housing not shown);

[0032] Figure 2 A bottom view of an operating mechanism of a switch in Example 1;

[0033] Figure 3 Schematic diagram of the structure of the spring assembly;

[0034] Figure 4 This is an exploded view of the splint, the second gear, and the shaft;

[0035] Figure 5 This is a cross-sectional view of the assembled splint, spring assembly, and coupling;

[0036] Figure 6 is a cross-sectional view of an operating mechanism of a switch in Example 1;

[0037] Figure 8 Schematic diagram of the structure of a rotating shaft for connecting output driven members on both sides;

[0038] Figure 9 This is a schematic diagram of the three-dimensional structure of an operating mechanism of a switch in Example 1;

[0039] Figure 10 This is a schematic diagram of the three-dimensional structure of an operating mechanism of a switch in Example 1;

[0040] Figure 11 This is a structural schematic diagram of a housing of an operating mechanism of a switch in Example 2;

[0041] Figure 12 This is a schematic structural diagram of an operating mechanism of a switch in Example 2;

[0042] Figure 13 is a cross-sectional view of an operating mechanism of a switch in Example 2;

[0043] Figure 14 It is a schematic diagram of the movement limit of the slider assembly;

[0044] Figure 15 This is the cross-sectional view of normal gate opening;

[0045] Figure 16 This is a schematic diagram of normal opening;

[0046] Figure 17 and Figure 18 This is a schematic diagram of Example 3;

[0047] Figure 19 and Figure 20 This is a schematic diagram of Example 4;

[0048] Description of the marks in the figure:

[0049] 1. Top operating wheel; 11. First gear; 3. Clamp; 31. First mounting hole; 32. Second circumferential limiting hole; 33. First limiting surface; 4. Slider assembly; 41. First rack; 42. Second rack; 5. Second gear; 51. First spring shaft; 52. Second mounting hole; 53. Third circumferential limiting hole; 54. Second limiting surface; 6. Spring assembly; 61. Spring bracket; 62. Main compression spring; 63. Support plate; 64. Second spring shaft; 7. Coupling; 71. Circular hole; 72. First circumferential limiting shaft; 8. Rotating shaft; 81. Second circumferential limiting shaft; 82. Second circular axis surface; 9. Housing; 91. Third limiting surface; 92. Fourth limiting surface; 10- Elastic telescopic member; 11- Limiting member; 12- Side operating wheel. DETAILED DESCRIPTION

[0050] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are implemented based on the above technical solution of the present invention, and provide detailed implementation methods and specific operating processes, but the protection scope of the present invention is not limited to the following embodiments.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0052] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0053] Example 1:

[0054] An operating mechanism for an isolating switch, similar to CN202311693667.X, with a top operating wheel 1 and a side operating wheel 12 as input active components, a coupling 7 as an output driven component, and the coupling 7 connected to an external contact module;

[0055] like Figure 1 and Figure 2As shown, the splints 3, the second gears 5, and the spring assemblies 6 are arranged in pairs, with the two splints 3 on the outermost sides, followed by the two second gears 5, and the spring assembly 6 in the middle;

[0056] like Figure 3 As shown, the spring assembly 6 consists of a spring bracket 61, a main compression spring 62, a support plate 63 and a second spring shaft 64. The main compression spring 62 is installed between the spring bracket 61 and the support plate 63. The support plate 63 abuts against the second spring shaft 64. The second spring shaft 64 is installed as shown in FIG. Figure 4 In the first mounting hole 31 on the clamping plate 3 shown.

[0057] like Figure 4 、 Figure 5 As shown, the clamping plate 3 has a second circumferential limiting hole 32, the second gear 5 has a third circumferential limiting hole 53, the rotating shaft 8 has a second circumferential limiting axis 81 and a second circular axial surface 82, and the coupling 7 has a circular hole 71 and a first circumferential limiting axis 72. The second axial limiting hole cooperates with the first axial limiting axis, the third circumferential limiting hole 53 and the first circumferential limiting hole 21 cooperate with the second circumferential limiting axis 81, the second circular axial surface 82 cooperates with the circular hole 71, and the first circular axial surface 22 cooperates with the small-diameter portion of the second circumferential limiting hole 32. Figure 5 As shown, similar to the connection relationship between the third circumferential limiting hole 53 and the second circumferential limiting shaft 81, the side operating wheel 12 is limitedly matched with the second circumferential limiting shaft 81 and rotates coaxially.

[0058] like Figure 6 As shown, the second gear 5 has a second mounting hole 52, the first spring shaft 51 is installed in the second mounting hole 52, the spring bracket 61 abuts against the first spring shaft 51, and the compression force of the main compression spring 62 is applied to the first spring shaft 51 and the second spring shaft 64, giving the second gear 5 and the splint 3 opposite torque.

[0059] like Figure 10 and Figure 11 As shown, the entire mechanism is placed in the housing 9 , and the second limiting surface 54 on the second gear 5 and the first limiting surface 33 on the splint 3 are in contact with the third limiting surface 91 and the fourth limiting surface 92 in the housing 9 respectively.

[0060] like Figure 7 As shown, the top operating wheel 1 is fixedly connected to the first gear 11, and the two can also be used as a whole. The slider assembly 4 is composed of a first rack 41 and a second rack 42, which are fixedly connected. The first gear 11 is engaged with the first rack 41, and the second rack 42 is engaged with the second gear 5.

[0061] The clamping plate 3 is arranged on the side close to the inner wall of the housing 9 relative to the second rack 42.

[0062] like Figure 6As shown, the movement process of the mechanism is as follows:

[0063] The rotation of the top operating wheel 1 drives the slider assembly 4 to slide to the right, and the second rack 42 drives the second gear 5 to rotate clockwise; the second gear 5 drives the second spring shaft 64 to rotate and compresses the main compression spring 62. At this time, the main compression spring 62 gives a clockwise torque to the splint 3. Since the first limit surface 33 of the splint 3 abuts the third limit surface 91 of the shell 9, the splint 3 does not rotate clockwise. When the spring assembly 6 passes the dead point, the main compression spring 62 gives a counterclockwise torque to the splint 3, and the splint 3 drives the coupling 7 to rotate rapidly counterclockwise until the first limit surface 33 at the other end of the splint 3 abuts the third limit surface 91 at the other end of the shell 9 and stops moving.

[0064] like Figure 8 and Figure 9 As shown, the second circular axis surface 82 of the rotating shaft 8 can also be symmetrically arranged, so that there are two coupling members 7 on both sides of the mechanism, and the top operating wheel 1 can operate the contact modules symmetrically arranged on both sides of the mechanism.

[0065] Example 2:

[0066] A switch operating mechanism differs from Example 1 only in that it further includes a stopper 11 disposed on the inner wall of a housing 9. The stopper 11 includes a transition section and an elastic protruding section connected to each other. The transition section is connected to the inner wall of the housing 9, and the elastic protruding section elastically protrudes from the inner wall of the housing 9.

[0067] Specifically, the limiting member 11 is made of elastic material, one end of the transition section is fixedly connected to the inner wall of the housing 9, and the other end is connected to the elastic protruding section. The elastic protruding section has an outward convex arc surface structure.

[0068] The rest is the same as in Example 1.

[0069] In some specific embodiments, the elastic material is stainless steel or manganese steel, or elastic plastic, etc.

[0070] In some specific embodiments, the limiting members 11 are symmetrically arranged on opposite inner walls of the housing 9 .

[0071] In some specific embodiments, one end of the transition section is fixed to the inner wall of the housing 9 by screws.

[0072] In some specific embodiments, the elastic displacement direction of the elastic protruding section is perpendicular to the lateral displacement direction of the slider assembly 4 .

[0073] In some specific embodiments, a limiting protrusion is provided on the outer wall of the distal end of the splint 3. When the splint 3 rotates to open the elastic protruding section outward, the elastic protruding section can be in limiting contact with the limiting protrusion.

[0074] In some specific embodiments, the limiting protrusion is an end portion of the second spring shaft 64 extending out of the first mounting hole 31 .

[0075] like Figure 1 The figure shows the operating mechanism in the closed state. The entire mechanism is placed in a shell 9 that is connected in pairs. The limit members 11 are installed in pairs on the inner wall of the shell 9. The limit members 11 can deform or move in the normal direction of the symmetry plane of the mechanism.

[0076] like Figure 2 As shown, one end of the limiter 11 is fixedly mounted on the inner wall of the housing 9 , the fixed end is located outside the splint 3 , and the other end extends toward the symmetry plane of the mechanism to the inside of the slider assembly 4 , thereby limiting the slider assembly 4 .

[0077] The mechanism movement process is as follows:

[0078] like Figure 14 As shown, when the switch is subjected to a large current shock such as a short-circuit current, the contacts are welded, and the splint 3 is fixedly connected to the contacts. When the operator operates the top operating wheel 1 or the side operating wheel 12 to perform the opening operation, the operating wheel drives the slider assembly 4 to slide toward the limiter 11. Since the splint 3 is fixedly connected to the contact, the mechanism cannot open, the left end splint 3 cannot be lifted upward, and the slider assembly 4 is blocked by the limiter 11, so that the top operating wheel 1 and the side operating wheel 12 cannot point to the opening position. The operator finds that the switch has malfunctioned and cannot be opened, thus avoiding personal safety accidents.

[0079] like Figure 15 and Figure 16 As shown, when the switch is normally opened, the contacts can operate normally. When the operator performs the opening operation and operates the top operating wheel 1 and the side operating wheel 12, the operating wheel drives the slider assembly 4 to slide toward the limit member 11. At this time, the left end clamp 3 is lifted upward, squeezing the limit member 11, causing the limit member 11 to deform to both sides of the mechanism. The end of the limit member 11 that was originally on the inner side of the slider assembly 4 is deformed to the outside of the clamp 3, without limiting the slider assembly 4. The top operating wheel 1 and the side operating wheel 12 point to the opening position.

[0080] Example 3:

[0081] A switch operating mechanism differs from Example 2 in that: the transition section is a slanted plate, one end of which is hinged to the inner wall of the housing 9; the elastic protruding section includes an abutment plate connected to the slanted plate, and an elastic member 10 disposed between the abutment plate and the inner wall of the housing 9. Preferably, the elastic member 10 is a spring.

[0082] like Figure 17 and Figure 18As shown, the limiting members 11 are movably installed in pairs in the housing 9, one end of which is located outside the splint 3 and is rotatably arranged in the housing 9, and the other end extends to the inner side of the slider assembly 4 toward the symmetry plane of the mechanism, playing a role in limiting the slider assembly 4. The limiting members 11 can be as follows Figure 7 As shown in the counterclockwise rotation, the fixed side of the spring abuts against the inner wall of the housing 9 , and the force-applying side abuts against the limiting member 11 .

[0083] The rest is the same as Example 2.

[0084] Example 4:

[0085] A switch operating mechanism differs from Example 2 in that: a slide groove is provided on the inner wall of a housing 9; a limit member 11 is slidably connected to the slide groove along the depth direction; the transition section includes an inclined plate; the elastic protruding section includes an abutment plate connected to the inclined plate; and an elastic member 10 is provided between the abutment plate and the inner wall of the housing 9. Preferably, the elastic member 10 is a spring.

[0086] like Figure 19 and Figure 20 As shown, the limiting members 11 are movably installed in pairs in the shell 9 and can move in the inner wall of the shell 9 in the manner of a slider. One end is located on the outside of the splint 3, and the other end extends to the inner side of the slider assembly 4, thereby limiting the slider assembly 4. The fixed side of the spring rests on the inner wall of the shell 9, and the force-applying side rests on the limiting member 11.

[0087] The rest is the same as Example 2.

[0088] In some specific embodiments, the transition section also includes a straight plate, one end of the straight plate is connected to the inclined plate, and the other end slides against the inner wall of the slide groove; one end of the abutment plate is connected to the inclined plate, and the other end slides against the inner wall of the slide groove.

[0089] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A switch operating mechanism, comprising a housing (9), a top operating wheel (1), a first gear (11), a slider assembly (4), a second gear (5), a rotating transmission member, an output follower, and a spring assembly (6), wherein the slider assembly (4) comprises a second rack (42), the rotating transmission member comprises a clamping plate (3), and the clamping plate (3) is arranged on a side close to the inner wall of the housing (9) relative to the second rack (42), characterized in that: The operating mechanism further includes a limiting member (11) provided on the inner wall of the housing (9). The limiting member (11) comprises a transition section and an elastic protruding section connected to each other, wherein the transition section is connected to the inner wall of the housing (9), and the elastic protruding section elastically protrudes from the inner wall of the housing (9) so that When the top operating wheel (1) drives the slider assembly (4) to slide laterally, the elastic protruding section can abut against the slider assembly (4) in a limiting manner; When the slider assembly (4) slides laterally until the triggering plate (3) rotates, the distal end of the plate (3) passes through the transition section, abuts against the elastic protruding section and stretches outward, so that the top operating wheel (1) can drive the slider assembly (4) to further slide laterally through the elastic protruding section.

2. The operating mechanism of the switch according to claim 1, characterized in that: The limiting members (11) are symmetrically arranged on opposite inner walls of the housing (9).

3. The operating mechanism of the switch according to claim 1, characterized in that: A limiting protrusion is provided on the outer wall of the distal end of the clamping plate (3); when the clamping plate (3) is rotated to open the elastic protruding section outward, the elastic protruding section can be in limiting contact with the limiting protrusion.

4. The operating mechanism of the switch according to claim 1, characterized in that: The limiting member (11) is an elastic material limiting member, one end of the transition section is fixedly connected to the inner wall of the shell (9), and the other end is connected to the elastic protruding section.

5. The operating mechanism of the switch according to claim 4, characterized in that: The elastic protruding section has an outwardly convex arc surface structure.

6. The operating mechanism of the switch according to claim 1, characterized in that: The transition section is an inclined plate, one end of which is hinged to the inner wall of the housing (9); The elastic protruding section comprises an abutting plate connected to the inclined plate, and an elastic telescopic member (10) arranged between the abutting plate and the inner wall of the shell (9).

7. The operating mechanism of the switch according to claim 6, characterized in that: The elastic telescopic member (10) is a spring.

8. The operating mechanism of the switch according to claim 1, characterized in that: A sliding groove is provided on the inner wall of the housing (9), and the limiting member (11) is slidably connected in the sliding groove. The transition section includes an inclined plate, and the elastic protruding section includes an abutting plate connected to the inclined plate, and an elastic telescopic member (10) provided between the abutting plate and the inner wall of the housing (9).

9. The operating mechanism of the switch according to claim 8, characterized in that: The transition section further comprises a straight plate, one end of which is connected to the inclined plate, and the other end of which is in sliding contact with the inner wall of the chute; One end of the abutment plate is connected to the inclined plate, and the other end is in sliding abutment with the inner wall of the chute.

10. The operating mechanism of the switch according to claim 8, characterized in that: The elastic telescopic member (10) is a spring.

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