A power on / off mechanism for circuit breaker

Abstract

The present application relates to an on-off mechanism for a circuit breaker, and relates to the technical field of electrical equipment, comprising a mounting plate fixedly mounted on a housing cover of the circuit breaker, the mounting plate being provided with a clearance notch for inserting an operating handle of the circuit breaker, an adjusting plate being slidably mounted on the mounting plate at an opening edge of the clearance notch away from the circuit breaker, the adjusting plate being provided with an adjusting notch for inserting an operating handle; a limiting sleeve being rotatably mounted on the mounting plate, a first adjusting rod being fixedly mounted on the outer periphery of the limiting sleeve, a second adjusting rod being hingedly mounted on the outer side surface of the adjusting rod, and the other end of the second adjusting rod being hingedly mounted to the end of the first adjusting rod away from the limiting sleeve; in the present application, when controlling the on-off of the circuit breaker, the on-off control of the circuit breaker can be realized outside the electrical cabinet, thereby improving the safety performance during the maintenance process.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a power on / off mechanism for a circuit breaker. Background Art

[0002] The electrical switchgear, as an indispensable device for receiving and distributing electric energy in the power system, is centered on the key electrical component, the circuit breaker. Based on the requirements of the primary electrical wiring diagram, the manufacturer carefully assembles high and low voltage electrical appliances (including control, protection and measurement electrical appliances), busbars, current-carrying conductors (i.e. wires) and insulators and other components in a closed or semi-closed metal cabinet. This design not only ensures the stable operation of electrical equipment, but also greatly improves the safety of operation.

[0003] The miniature circuit breaker includes a housing, a housing cover, and an operating mechanism installed in the housing, wherein the operating handle extends through the housing to the outside, and the user can control the on and off of the circuit breaker by turning the operating handle. In the precise structure of the switch cabinet, the circuit breaker chamber plays a vital role. It is necessary to install circuit breakers of corresponding specifications according to actual needs, and directly fix them with bolts to ensure the stability of the circuit breaker in the circuit breaker chamber. However, during the daily maintenance of the switch cabinet and its internal electrical equipment, a safety hazard that cannot be ignored has quietly emerged.

[0004] To ensure the smooth progress of maintenance work, maintenance personnel need to adjust the circuit breaker to the disconnected state first. However, in the conventional switch cabinet design, this operation often lacks a convenient control structure. Maintenance personnel have to risk reaching into the circuit breaker room and directly operate the circuit breaker to disconnect it. However, the circuit breaker room is often filled with a large amount of static electricity. This behavior undoubtedly increases the risk of electric shock and poses a serious threat to the life safety of maintenance personnel. There is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a power on / off mechanism for a circuit breaker, so as to solve the problem of potential safety hazards when the circuit breaker in the circuit breaker chamber is turned on and off.

[0006] The present application provides a circuit breaker on-off mechanism that adopts the following technical solution:

[0007] A power-on-off mechanism for a circuit breaker comprises a mounting plate fixedly mounted on a housing cover of the circuit breaker, the mounting plate being provided with a clearance notch for inserting an operating handle of the circuit breaker, an adjusting plate being slidably mounted on the mounting plate at an opening edge of the clearance notch away from the circuit breaker, the adjusting plate being provided with an adjusting notch for inserting an operating handle; a limiting sleeve being rotatably mounted on the mounting plate, a first adjusting rod being fixedly mounted on the outer periphery of the limiting sleeve, a second adjusting rod being hingedly mounted on the outer side surface of the adjusting rod, the other end of the second adjusting rod being hingedly mounted to the end of the first adjusting rod away from the limiting sleeve; when the limiting sleeve is rotated, the adjusting plate is driven to slide back and forth through the first adjusting rod and the second adjusting rod, thereby driving the operating handle inserted into the adjusting notch to rotate.

[0008] By adopting the above technical scheme, when the on-off mechanism is used, the mechanism is fixed on the circuit breaker in advance, and then the circuit breaker is installed in the circuit breaker chamber in the electrical cabinet; when the circuit breaker is controlled to be on or off, the external connecting rod coaxially fixed with the limit sleeve is controlled to rotate to drive the limit sleeve to rotate synchronously, and the adjustment plate is driven to slide back and forth through the first adjustment rod and the second adjustment rod, thereby driving the operating handle stuck in the adjustment notch to rotate, so as to control the on and off of the circuit breaker. With this arrangement, the on and off control of the circuit breaker can be achieved outside the electrical cabinet, thereby improving the safety performance during the maintenance process.

[0009] Optionally, limiting plates are symmetrically fixed on the side surfaces of the mounting plate, and limiting notches for the edge of the adjustment plate to be inserted and slide are provided on the relatively close sides of the limiting plates.

[0010] By adopting the above technical solution, due to the symmetrical arrangement of the limiting plates and the two opposite edges of the adjusting plate being respectively inserted into the corresponding limiting notches, the stability of the adjusting plate during the sliding process is improved.

[0011] Optionally, an upper positioning plate and a lower positioning plate are slidably provided on two opposite edges of the side of the mounting plate, respectively, the upper positioning plate and the lower positioning plate are arranged side by side and perpendicular to the mounting plate, and the sides of the upper positioning plate and the lower positioning plate close to each other can abut against the two opposite sides of the circuit breaker housing; a locking plate is hingedly connected to the side edge of the upper positioning plate away from the mounting plate, a locking through hole is provided on the locking plate, a locking screw hole that can overlap with the locking through hole is provided on the lower positioning plate, and a locking bolt is provided on the side of the mounting plate which penetrates the locking through hole and is screwed into the locking screw hole.

[0012] By adopting the above technical solution, due to the combined arrangement of the upper positioning plate, the lower positioning plate and the locking plate, during the assembly process of the circuit breaker and the on-off mechanism, the circuit breaker is placed between the upper positioning plate and the lower positioning plate; then the upper positioning plate and the lower positioning plate are slid toward each other to abut against the two opposite side surfaces of the circuit breaker housing, and then the locking plate is rotated to make the locking through hole coincide with the locking screw hole, and finally a locking bolt is used to penetrate the locking through hole and then screwed into the locking screw hole; thereby further improving the assembly stability of the circuit breaker and the on-off mechanism.

[0013] Optionally, extension plates are fixed on two opposite edges of the mounting plate, dovetail slides are fixed on the sides of the extension plates facing the upper positioning plate and the lower positioning plate, and dovetail grooves for inserting and sliding the dovetail slides are provided on the sides of the upper positioning plate and the lower positioning plate facing the mounting plate.

[0014] By adopting the above technical solution, during the sliding process of the upper positioning plate and the lower positioning plate, the dovetail slide bar is slid into the corresponding dovetail slide groove, thereby improving the stability of the upper positioning plate and the lower positioning plate during the reciprocating sliding process.

[0015] Optionally, elastic pads are fixedly provided on the sides of the upper positioning plate and the lower positioning plate that are close to each other, and the elastic pads are provided with anti-slip grooves.

[0016] By adopting the above technical solution, due to the installation arrangement of the elastic pad, the stability of the upper positioning plate and the lower positioning plate when they abut against the outer side surface of the circuit breaker is enhanced, and the possibility of the two plates wearing the surface of the circuit breaker is reduced.

[0017] Optionally, a cooling fan is provided on the locking plate, a control button for controlling the operation of the cooling fan is fixedly provided on the side edge of the upper positioning plate away from the mounting plate, and a guide notch opposite to the cooling fan is opened on the locking plate.

[0018] By adopting the above technical solution, when the circuit breaker is used, the heat dissipation fan can be started by the control button to enhance the air circulation near the circuit breaker, thereby reducing the possibility of overheating of the circuit breaker during use and improving the corresponding safety performance.

[0019] Optionally, a first control rod located above the upper positioning plate is fixedly provided on the adjustment plate, and a second control rod bent toward the locking plate is fixedly provided at the end of the first control rod, and the second control rod can press the control button as the adjustment plate slides.

[0020] By adopting the above technical solution, during the reciprocating sliding of the first control rod driven by the adjustment plate, due to the combined arrangement of the first control rod and the second control rod, the second control rod can press or reset the control button; when the circuit breaker is in the disconnected state, the control button is reset and the cooling fan stops; when the circuit breaker is in the connected state, the control button is pressed and the cooling fan starts.

[0021] Optionally, elastic support plates are hinged on the opposite side surfaces of the lower positioning plate, the length of the elastic support plates can be elastically adjusted, and blocking blocks are fixed on the side edges of the elastic support plates away from the lower positioning plate. The elastic support plates can be rotated to a vertical state toward the upper positioning plate, and the blocking blocks are rotated to the top of the upper positioning plate in this state.

[0022] By adopting the above technical solution, when the circuit breaker is installed, due to the combined arrangement of the elastic support plate and the blocking block, the circuit breaker is pre-placed between the upper positioning plate and the lower positioning plate, and then the elastic support plate is rotated to a vertical state in a direction close to the upper positioning plate, and the blocking block is rotated to the top of the upper positioning plate, so that the upper positioning plate and the lower positioning plate are elastically tightened, thereby pre-clamping and pre-locking the circuit breaker, which is convenient for the subsequent tightening of the locking bolts.

[0023] Optionally, a plurality of legs capable of abutting against a mounting surface are fixedly disposed on the side of the lower positioning plate away from the upper positioning plate, a first waist-shaped hole is opened on the elastic support plate, and the elastic support plate can be rotated to a state parallel to the lower positioning plate.

[0024] By adopting the above technical solution, when the elastic support plate is rotated downward to a state parallel to the lower positioning plate, the support foot is abutted against the mounting surface. Then, due to the opening of the first waist-shaped hole, a screw can be used to penetrate the first waist-shaped hole and fix it on the mounting surface, thereby improving the corresponding assembly efficiency.

[0025] Optionally, a second waist-shaped hole is provided on the blocking block, and the elastic support plate can be rotated downward to a vertical state so that the blocking block abuts against the mounting surface.

[0026] By adopting the above technical solution, when the two symmetrical elastic support plates are synchronously rotated downward to a vertical state, due to the opening of the second waist-shaped hole, a screw can be used to penetrate the second waist-shaped hole and fix it on the mounting surface, thereby increasing the installation height of the circuit breaker, increasing the distance between the circuit breaker and the mounting surface, and improving the corresponding use performance.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] When the circuit breaker is controlled to be on or off, the external connecting rod coaxially fixed with the limit sleeve is controlled to rotate to drive the limit sleeve to rotate synchronously. The first adjusting rod and the second adjusting rod drive the adjusting plate to slide back and forth, thereby driving the operating handle inserted into the adjusting notch to rotate, so as to control the on and off of the circuit breaker. With this arrangement, the on and off control of the circuit breaker can be achieved outside the electrical cabinet, thereby improving the safety performance during the maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0031] Figure 2 It is a schematic diagram of the explosion structure of Example 1 of the present application;

[0032] Figure 3 This is a schematic diagram of the structure of the adjustment plate installation cooperation in Example 1 of the present application;

[0033] Figure 4 It is a schematic diagram of the overall structure of Example 2 of the present application;

[0034] Figure 5 is a cross-sectional structural diagram of the locking plate installation cooperation embodied in the second embodiment of the present application;

[0035] Figure 6 It is a partial cross-sectional structural schematic diagram of the installation and cooperation of the first supporting part and the second supporting part embodied in the second embodiment of the present application;

[0036] Figure 7 is a schematic diagram of the structure of the locking plate when the locking plate is rotated to a horizontal state in Embodiment 2 of the present application;

[0037] Figure 8 It is a schematic diagram of the structure of Example 2 of the present application when the locking plate is rotated downward to a vertical state.

[0038] In the figure, 1, mounting plate; 11, clearance notch; 12, limiting plate; 121, limiting notch; 13, receiving plate; 131, receiving through hole; 14, extension plate; 141, dovetail slide; 142, limiting screw; 2, adjustment plate; 21, adjustment notch; 22, second adjustment rod; 23, first control rod; 24, second control rod; 3, limiting sleeve; 31, first adjustment rod; 4, positioning assembly; 41, upper positioning plate; 411, elastic pad; 412, dovetail slide; 42. Lower positioning plate; 421. Locking screw hole; 422. Support foot; 43. Locking plate; 431. Locking through hole; 432. Diversion notch; 44. Locking bolt; 45. Cooling fan; 46. Control button; 5. Elastic support plate; 51. First support part; 511. Insert plate; 512. Bump; 513. First waist-shaped hole; 52. Second support part; 521. Insert cavity; 522. Limiting slide groove; 53. Compression spring; 54. Blocking block; 541. Second waist-shaped hole. DETAILED DESCRIPTION

[0039] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0040] Embodiment 1:

[0041] Reference Figure 1 and Figure 2 A circuit breaker on-off mechanism includes a mounting plate 1 fixedly mounted on a housing cover of the circuit breaker by screws, wherein a clearance notch 11 for inserting an operating handle of the circuit breaker is provided on the mounting plate 1, an adjusting plate 2 is slidably mounted on the mounting plate 1 at an opening edge away from the clearance notch 11 of the circuit breaker, and an adjusting notch 21 for inserting an operating handle is provided on the adjusting plate 2; a limiting sleeve 3 is rotatably mounted on the mounting plate 1, a first adjusting rod 31 is fixedly mounted on the outer periphery of the limiting sleeve 3, a second adjusting rod 22 is hingedly mounted on the outer surface of the adjusting rod, and the other end of the second adjusting rod 22 is hingedly mounted to the end of the first adjusting rod 31 away from the limiting sleeve 3;

[0042] When the on-off mechanism is used, the mechanism is fixed on the circuit breaker in advance, and then the circuit breaker is installed in the circuit breaker chamber in the electrical cabinet. In this state, the mounting plate 1 is vertically arranged, and then a connecting rod is used to fix the inside of the limit sleeve 3, and the outer end of the connecting rod passes through the cabinet door of the circuit breaker chamber; when the circuit breaker is controlled to be on and off, the outer end of the connecting rod is controlled to rotate to drive the limit sleeve 3 to rotate synchronously, and the adjustment plate 2 is driven to slide back and forth through the first adjustment rod 31 and the second adjustment rod 22, and then the operating handle inserted into the adjustment notch 21 is driven to rotate, so as to control the on and off of the circuit breaker.

[0043] Reference Figure 2 and Figure 3 A limiting plate 12 is symmetrically fixed on the side of the mounting plate 1. The limiting plate 12 is integrally formed with the mounting plate 1. A limiting notch 121 is provided on the relatively close side of the limiting plate 12 for the edge of the adjusting plate 2 to be inserted and slide, thereby realizing the sliding limit of the adjusting plate 2.

[0044] A receiving plate 13 is fixed to the outer surface of the mounting plate 1 by screws, and a receiving through hole 131 is provided on the receiving plate 13 for inserting the limiting sleeve 3; the limiting sleeve 3 is rotationally limited by the receiving plate 13 so that the limiting sleeve 3 can rotate around its own axis in the receiving through hole 131.

[0045] The implementation principle of the embodiment of the present application is:

[0046] When the circuit breaker is controlled to be on or off, the external connecting rod coaxially fixed with the limit sleeve 3 is controlled to rotate to drive the limit sleeve 3 to rotate synchronously, and the adjustment plate 2 is driven to slide back and forth through the first adjustment rod 31 and the second adjustment rod 22, thereby driving the operating handle inserted into the adjustment notch 21 to rotate, so as to control the on and off of the circuit breaker.

[0047] Embodiment 2:

[0048] Reference Figure 4 and Figure 5 , the embodiment of the present application is different from the embodiment 1 in that a positioning assembly 4 is provided on the side of the mounting plate 1, wherein the positioning assembly 4 includes an upper positioning plate 41 and a lower positioning plate 42 which are slidably arranged on two opposite edges of the same side of the mounting plate 1, wherein the upper positioning plate 41 and the lower positioning plate 42 are arranged side by side and perpendicular to the mounting plate 1, and the sides of the upper positioning plate 41 and the lower positioning plate 42 which are close to each other can slide towards each other to abut against the two opposite sides of the circuit breaker housing;

[0049] On the sides of the upper positioning plate 41 and the lower positioning plate 42 close to each other, elastic pads 411 made of rubber are fixed, wherein the elastic pads 411 are provided with anti-slip grooves (not shown in the figure); the side edge of the upper positioning plate 41 away from the mounting plate 1 is hinged with a locking plate 43, and a locking through hole 431 is provided on the locking plate 43, and a locking screw hole 421 that can overlap with the locking through hole 431 is provided on the lower positioning plate 42, wherein a locking bolt 44 is provided on the side of the mounting plate 1;

[0050] When installing and locking the circuit breaker, first place the circuit breaker between the upper positioning plate 41 and the lower positioning plate 42; then slide the upper positioning plate 41 and the lower positioning plate 42 toward each other until they are in contact with the opposite sides of the circuit breaker housing, so that the elastic pad 411 is tightly pressed against the outer side of the circuit breaker housing; then rotate the locking plate 43 to make the locking through hole 431 coincide with the locking screw hole 421, and finally use the locking bolt 44 to penetrate the locking through hole 431 and then screw it into the locking screw hole 421.

[0051] Reference Figure 5 , extension plates 14 are fixedly provided on the two opposite edges of the mounting plate 1, wherein dovetail slide bars 141 are integrally formed on the side surfaces of the extension plates 14 facing the upper positioning plate 41 and the lower positioning plate 42, and dovetail slide grooves 412 are provided on the side surfaces of the upper positioning plate 41 and the lower positioning plate 42 facing the mounting plate 1 for the dovetail slide bars 141 to be inserted and slide, thereby realizing the sliding connection between the upper positioning plate 41 and the lower positioning plate 42 and the mounting plate 1; a limit screw 142 is screwed on the end surface of the dovetail slide bar 141 to prevent the upper positioning plate 41 and the lower positioning plate 42 from sliding out under normal circumstances.

[0052] Reference Figure 4 and Figure 5 A cooling fan 45 is provided on the locking plate 43, wherein the cooling fan 45 is an electric fan driven by a small motor, and a control button 46 for controlling the operation of the cooling fan 45 is fixedly provided on the side edge of the upper positioning plate 41 away from the mounting plate 1, and a guide notch 432 opposite to the cooling fan 45 is provided on the locking plate 43, thereby reducing the possibility of overheating of the circuit breaker during use and improving the corresponding safety performance;

[0053] A first control rod 23 is fixedly provided on the adjustment plate 2 and is located above the upper positioning plate 41, wherein a second control rod 24 is fixedly provided at the end of the first control rod 23 and is bent toward the locking plate 43; during the reciprocating sliding of the adjustment plate 2, the second control rod 24 can press or reset the control button 46; when the circuit breaker is in the disconnected state, the control button 46 is reset and the cooling fan 45 stops; when the circuit breaker is in the connected state, the control button 46 is pressed and the cooling fan 45 starts.

[0054] Reference Figure 4 and Figure 6 , elastic support plates 5 are hinged on the two opposite sides of the lower positioning plate 42, and the elastic support plate 5 includes a first support portion 51, a second support portion 52 and a compression spring 53. An insertion plate 511 is fixedly provided on the first support portion 51, and a protrusion 512 is fixedly provided on the outer edge of the side of the insertion plate 511 away from the first support portion 51, and an insertion cavity 521 for the insertion plate 511 to be inserted is provided on the second support portion 52, and a limiting slide groove 522 for the protrusion 512 to slide is provided on the inner wall of the insertion cavity 521, and the two ends of the compression spring 53 are respectively pressed against the inner wall of the protrusion 512 and the limiting slide groove 522; under normal conditions, the compression spring 53 squeezes the protrusion 512, so that the sides of the first support portion 51 and the second support portion 52 that are close to each other are pressed against each other; the second support portion 52 is hinged to the side edge of the lower positioning plate 42, and a blocking block 54 is fixedly provided on the side edge of the first support portion 51 away from the lower positioning plate 42;

[0055] When the circuit breaker is installed, the circuit breaker is placed between the upper positioning plate 41 and the lower positioning plate 42 in advance, and then the elastic support plate 5 is rotated to a vertical state in the direction close to the upper positioning plate 41, and the blocking block 54 is rotated to the top of the upper positioning plate 41, and the circuit breaker between the upper positioning plate 41 and the lower positioning plate 42 is pre-locked, so that the locking through hole 431 on the subsequent locking plate 43 is aligned with the locking screw hole 421 on the lower positioning plate 42, and is fastened with the locking bolt 44.

[0056] Reference Figure 7 and Figure 8 Four supporting legs 422 are fixedly provided on the side of the lower positioning plate 42 away from the upper positioning plate 41, a first waist-shaped hole 513 is opened on the first supporting portion 51, and a second waist-shaped hole 541 is opened on the blocking block 54; when the elastic support plate 5 is rotated downward to a state parallel to the lower positioning plate 42, the four supporting legs 422 on the bottom side of the lower positioning plate 42 abut against the mounting surface, and the elastic support plate 5 can be fixed on the mounting surface by passing through the first waist-shaped hole 513 by screws; when the elastic support plate 5 is rotated downward to a vertical state, the first waist-shaped hole 513 can be passed through by screws to fix it on the mounting surface, and the installation method of the circuit breaker can be adjusted according to different needs.

[0057] The implementation principle of the embodiment of the present application is:

[0058] When assembling and locking the circuit breaker and the on-off mechanism, first place the circuit breaker between the upper positioning plate 41 and the lower positioning plate 42; then slide the upper positioning plate 41 and the lower positioning plate 42 toward each other until they are in contact with the two opposite sides of the circuit breaker housing, so that the elastic pad 411 is tightly pressed against the outer side of the circuit breaker housing; and rotate the elastic support plate 5 to a vertical state in the direction close to the upper positioning plate 41, and rotate the blocking block 54 to the top of the upper positioning plate 41 to pre-lock the circuit breaker between the upper positioning plate 41 and the lower positioning plate 42; then rotate the locking plate 43 so that the locking through hole 431 coincides with the locking screw hole 421, and finally use the locking bolt 44 to penetrate the locking through hole 431 and then screw it into the locking screw hole 421;

[0059] After the circuit breaker and the on-off mechanism are assembled, the user can adjust the installation method of the circuit breaker according to different needs. First, the user can rotate the elastic support plate 5 downward to a state parallel to the lower positioning plate 42, and then use screws to penetrate the first waist-shaped hole 513 to fix it on the installation surface; second, the user can rotate the elastic support plate 5 downward to a vertical state, and then use screws to penetrate the second waist-shaped hole 541 to fix it on the installation surface.

[0060] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0061] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A power on / off mechanism for a circuit breaker, characterized in that: The invention comprises a mounting plate (1) fixedly mounted on a housing cover of a circuit breaker, the mounting plate (1) being provided with a clearance notch (11) for inserting an operating handle of the circuit breaker, an adjustment plate (2) being slidably mounted on the mounting plate (1) at an edge of an opening away from the clearance notch (11) of the circuit breaker, and the adjustment plate (2) being provided with an adjustment notch (21) for inserting an operating handle; A limiting sleeve (3) is rotatably provided on the mounting plate (1), a first adjusting rod (31) is fixedly provided on the outer periphery of the limiting sleeve (3), a second adjusting rod (22) is hingedly connected to the outer side surface of the adjusting rod, and the other end of the second adjusting rod (22) is hingedly connected to the end of the first adjusting rod (31) away from the limiting sleeve (3); when the limiting sleeve (3) rotates, the adjusting plate (2) is driven to slide back and forth through the first adjusting rod (31) and the second adjusting rod (22), thereby driving the operating handle inserted into the adjusting notch (21) to rotate; An upper positioning plate (41) and a lower positioning plate (42) are slidably disposed on two opposite edges of the side of the mounting plate (1), respectively; the upper positioning plate (41) and the lower positioning plate (42) are arranged side by side and perpendicular to the mounting plate (1); and the sides of the upper positioning plate (41) and the lower positioning plate (42) that are close to each other can abut against two opposite sides of the circuit breaker housing; A locking plate (43) is hingedly connected to the side edge of the upper positioning plate (41) away from the mounting plate (1); a locking through hole (431) is provided on the locking plate (43); a locking screw hole (421) that can overlap with the locking through hole (431) is provided on the lower positioning plate (42); and a locking bolt (44) that penetrates the locking through hole (431) and is screwed into the locking screw hole (421) is provided on the side of the mounting plate (1); The lower positioning plate (42) is hinged with elastic support plates (5) on the two opposite sides, the length of the elastic support plates (5) can be elastically adjusted, and the side edges of the elastic support plates (5) away from the lower positioning plate (42) are fixed with blocking blocks (54), and the elastic support plates (5) can be rotated in the direction close to the upper positioning plate (41) to a vertical state, and the blocking blocks (54) are rotated to the top of the upper positioning plate (41) in this state; A plurality of legs (422) capable of abutting against a mounting surface are fixedly provided on the side of the lower positioning plate (42) away from the upper positioning plate (41); a first waist-shaped hole (513) is provided on the elastic support plate (5), and the elastic support plate (5) can be rotated to a state parallel to the lower positioning plate (42); a second waist-shaped hole (541) is provided on the blocking block (54), and the elastic support plate (5) can be rotated downward to a vertical state so that the blocking block (54) abuts against the mounting surface.

2. A circuit breaker on-off mechanism according to claim 1, characterized in that: Limiting plates (12) are symmetrically fixed on the side surfaces of the mounting plate (1), and limiting notches (121) for the edge of the adjustment plate (2) to be inserted and slide are provided on the relatively close sides of the limiting plates (12).

3. A circuit breaker on-off mechanism according to claim 1, characterized in that: Extension plates (14) are fixedly provided on two opposite edges of the mounting plate (1), and dovetail slide bars (141) are fixedly provided on the side surfaces of the extension plates (14) facing the upper positioning plate (41) and the lower positioning plate (42), and dovetail slide grooves (412) for the dovetail slide bars (141) to be inserted and slide are provided on the side surfaces of the upper positioning plate (41) and the lower positioning plate (42) facing the mounting plate (1).

4. A circuit breaker on-off mechanism according to claim 1, characterized in that: Elastic pads (411) are fixedly arranged on the sides of the upper positioning plate (41) and the lower positioning plate (42) that are close to each other, and the elastic pads (411) are provided with anti-slip grooves.

5. A circuit breaker on-off mechanism according to claim 1, characterized in that: A heat dissipation fan (45) is provided on the locking plate (43); a control button (46) for controlling the operation of the heat dissipation fan (45) is fixedly provided on the side edge of the upper positioning plate (41) away from the mounting plate (1); and a flow guide notch (432) opposite to the heat dissipation fan (45) is provided on the locking plate (43).

6. A power on / off mechanism for a circuit breaker according to claim 5, characterized in that: The adjustment plate (2) is fixedly provided with a first control rod (23) located above the upper positioning plate (41); the end of the first control rod (23) is fixedly provided with a second control rod (24) bent toward the locking plate (43); the second control rod (24) is capable of pressing the control button (46) as the adjustment plate (2) slides.

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