Manual operating mechanism for circuit breaker in drawer cabinet

Abstract

This utility model belongs to the field of drawer cabinets, specifically relating to a manual operating mechanism for a circuit breaker used in a drawer cabinet. It includes a handle, a square shaft, and a manual operating component. The two ends of the square shaft are connected to the handle and the bushings of the manual operating component. The handle drives the manual operating component to perform opening and closing actions via the square shaft. It also includes an assist component, which includes a support plate, a blocking member, and an elastic member. The elastic member is positioned between the blocking member and the support plate. When the square shaft rotates in the closing direction, the blocking member rotates with the square shaft, storing energy in the elastic member. When the circuit breaker trips, the elastic member releases its energy, and the elastic force of the elastic member causes the blocking member to drive the square shaft to rotate in the opening direction. The addition of the assist component to the square shaft effectively solves the problem that the square shaft cannot rotate back to the tripping position due to insufficient tripping force of the circuit breaker, ensuring that the handle can rotate back to the tripping position.

Description

Technical Field

[0001] This utility model belongs to the field of drawer cabinet technology, specifically relating to a manual operation mechanism for a circuit breaker used in a drawer cabinet. Background Technology

[0002] When molded case circuit breakers are used in drawer cabinets, the circuit breaker is operated manually from outside the drawer cabinet door. This is especially true for circuit breakers with high current frame ratings. On the one hand, the operation is quick, saving the time of opening the cabinet door. On the other hand, the operator is kept away from conductive parts, making it safer. Furthermore, the lever action of the manual operating mechanism can reduce the force required for operation.

[0003] Currently, existing manual operating mechanisms for circuit breakers used in drawer cabinets include a manual operating component mounted on the circuit breaker, a handle rotated on the drawer of the cabinet, and a drive shaft. The drive shaft connects the handle and the manual operating component. The handle drives the manual operating component via the drive shaft, causing the circuit breaker handle to perform opening and closing actions, thus realizing the opening and closing of the circuit breaker. When the circuit breaker trips, the tripping force of the circuit breaker cannot drive the handle to the tripping indication position via the manual operating component and the drive shaft. Operators outside the cabinet cannot know the operating status of the circuit breaker, which may lead to operational errors or equipment damage, easily causing safety hazards. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a manual operating mechanism for a circuit breaker in a drawer cabinet.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A manual operating mechanism for a circuit breaker in a drawer cabinet includes a handle, a square shaft, and a manual operating component mounted on the drawer of the drawer cabinet. Both ends of the square shaft are connected to the handle and the bushings of the manual operating component. The handle drives the manual operating component to perform opening and closing actions via the square shaft. The mechanism also includes an assist component mounted on the square shaft. The assist component includes a support plate mounted inside the drawer and a blocking member and an elastic member linked to the square shaft. The elastic member is positioned between the blocking member and the support plate. When the square shaft rotates in the closing direction, the blocking member rotates with the square shaft, storing energy in the elastic member. When the circuit breaker trips and opens, the elastic member releases its energy, and the elastic force of the elastic member causes the blocking member to drive the square shaft to rotate in the opening direction.

[0006] In some embodiments, the elastic element is a torsion spring, the first torsion arm of the torsion spring abuts against the blocking element, and the second torsion arm of the torsion spring abuts against the support plate.

[0007] In some embodiments, the blocking member is provided with a plurality of adjustment slots for adjusting the spring force of the torsion spring, and the first torsion arm is engaged in one of the adjustment slots.

[0008] In some embodiments, the blocking member is detachably connected to a cover on the torsion spring, and the cover is provided with through holes through which the second torsion arm can pass.

[0009] In some embodiments, the blocking member has a sleeve portion on the side facing the pressure cap, the torsion spring is fitted onto the sleeve portion, and the sleeve portion is provided with a square hole that engages with the square shaft.

[0010] In some embodiments, the blocking member is provided with a positioning ring surrounding the sleeve portion, and the positioning ring is provided with a slot through which the first torsion arm can pass.

[0011] In some embodiments, the gland has a protruding ring portion that abuts against a positioning ring, and a receiving cavity for accommodating a torsion spring is formed between the protruding ring portion and the sleeve portion.

[0012] In some embodiments, the gland is provided with a through hole through which the sleeve portion passes, and the sleeve portion is provided with a plurality of hooks arranged in a rectangular array, the plurality of hooks passing through the through hole and engaging with the gland.

[0013] In some embodiments, the handle includes a handle seat disposed on the drawer and a rotary handle rotatably disposed on the handle seat. The handle seat is respectively provided with a tripped circuit breaker indicator, a tripped circuit breaker indicator, and a closed circuit breaker indicator. The square shaft passes through the handle seat and is engaged in the locking hole of the rotary handle.

[0014] The beneficial effects of this utility model are as follows: By adding an assist component to the square shaft, the assist component can effectively solve the problem that the square shaft cannot be rotated to the tripping position due to insufficient tripping force of the circuit breaker. When the circuit breaker trips, the torsion spring releases its capacity, and the torsion spring drives the square shaft to rotate in the tripping direction through the blocking component. The handle moves with the square shaft and rotates to the tripping position, so that the operator outside the cabinet can know the working status of the circuit breaker and effectively avoid misoperation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0017] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the present invention assembled inside a drawer of a cabinet;

[0019] Figure 4 This is a cross-sectional view of the auxiliary component in an embodiment of the present utility model. Detailed Implementation

[0020] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0022] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0024] like Figure 1-3As shown, a manual operating mechanism for a circuit breaker in a drawer cabinet includes a handle 1, a square shaft 2, and a manual operating component 3 mounted on a drawer 10 of the drawer cabinet. The two ends of the square shaft 2 are connected to the handle 1 and the bushings 31 of the manual operating component 3. The handle 1 drives the manual operating component 3 to perform opening and closing actions through the square shaft 2. The mechanism also includes an assist component 4 mounted on the square shaft 2. The assist component 4 includes a support plate 41 mounted inside the drawer 10, a blocking member 42 and an elastic member mounted on the square shaft 2 in linkage. The elastic member is located between the blocking member 42 and the support plate 41. When the square shaft 2 rotates in the closing direction, the blocking member 42 rotates with the square shaft 2 and stores energy in the elastic member. When the circuit breaker trips and opens, the elastic member releases the energy, and the elastic force of the elastic member causes the blocking member 42 to drive the square shaft 2 to rotate in the opening direction. The manual operation component 3 includes a mechanism frame 30, a bushing 31, a gear 32, and a pusher frame 33 rotatably mounted on the mechanism frame 30. The gear 32 is linked to the bushing 31 and is used to drive the pusher frame 33 to perform opening and closing actions. The pusher frame 33 is slidably mounted on the mechanism frame 30 and is used to drive the circuit breaker handle to perform opening and closing actions.

[0025] like Figure 1 , 2As shown in Figure 4, the elastic element is a torsion spring 43. The first torsion arm 431 of the torsion spring 43 abuts against the blocking element 42, and the second torsion arm 432 of the torsion spring 43 abuts against the support plate 41. The elastic element adopts a torsion spring structure, thereby ensuring that the torsion spring can reliably drive the blocking element to move, thus facilitating the assembly of the torsion spring with the blocking element and the support plate. The blocking element 42 is provided with multiple adjustment slots 421 for adjusting the elastic force of the torsion spring 43, and the first torsion arm 431 is engaged in one of the adjustment slots 421. The blocking element is provided with multiple adjustment slots, and the first torsion arm can be adjusted among multiple adjustment slots, thereby realizing the adjustment of the elastic force of the torsion spring. During assembly, the spring of the torsion spring can be adjusted according to the rotational force of the square shaft, thereby ensuring that the torsion spring can reliably drive the square shaft to rotate to the tripped position. The blocking element 42 is detachably connected to a cover 44 on the torsion spring 43, and the cover 44 is provided with through holes 440 for the second torsion arm 432 to pass through. The pressure cap prevents the torsion spring from disengaging from the blocking member, ensuring that the torsion spring is reliably engaged within the blocking member. The blocking member 42 has a sleeve portion 422 on the side facing the pressure cap 44. The torsion spring 43 is fitted onto the sleeve portion 422, and the sleeve portion 422 has a square hole 423 that engages with the square shaft 2. The torsion spring being fitted onto the sleeve portion facilitates the assembly of the torsion spring and the blocking member, and the square hole in the sleeve portion engaging with the square shaft further facilitates the assembly of the blocking member and the square shaft, ensuring more reliable transmission between the square shaft and the blocking member. The blocking member 42 has a positioning ring 424 surrounding the sleeve portion 422, and the positioning ring 424 has a slot 425 through which the first torsion arm 431 can pass. The positioning ring positions the torsion spring, ensuring a tighter connection between the torsion spring and the blocking member. The pressure cap 44 has a protruding ring portion 441 that abuts against the positioning ring 424. A receiving cavity 400 for accommodating the torsion spring 43 is formed between the protruding ring portion 441 and the sleeve portion 422. The receiving cavity for installing the torsion spring between the protruding ring portion and the sleeve portion facilitates the assembly of the torsion spring with the blocking member and the pressure cap, resulting in higher assembly efficiency. The pressure cap 44 is provided with a through hole 442 through which the sleeve portion 422 can pass. Multiple hooks 426 are distributed in a rectangular array on the sleeve portion 422. The multiple hooks 426 pass through the through hole 442 and engage with the pressure cap 44. The sleeve portion engages with the pressure cap through multiple hooks, thereby facilitating the assembly of the pressure cap and the blocking member and resulting in higher assembly efficiency.

[0026] like Figure 1 and 3 As shown, the handle 1 includes a handle seat 11 disposed on the drawer 10 and a rotating handle 12 rotatably disposed on the handle seat 11. The handle seat 11 is respectively provided with a tripping indicator 111, a tripping indicator 112, and a closing indicator 113. The square shaft 2 passes through the handle seat 11 and is engaged in the locking hole 121 of the rotating handle 12.

[0027] An assist component is added to the square shaft. This assist component can effectively solve the problem that the square shaft cannot be rotated to the tripping position due to insufficient tripping force of the circuit breaker. When the circuit breaker trips, the torsion spring releases its capacity. The torsion spring drives the square shaft to rotate in the tripping direction through the blocking component. The handle moves with the square shaft and rotates to the tripping position. This allows the operator outside the cabinet to know the working status of the circuit breaker and effectively avoids misoperation.

[0028] When closing the circuit breaker, the handle drives the sleeve of the manual operation component through the square shaft, and the blocking component moves with the square shaft and compresses the torsion spring. The sleeve drives the push frame through the gear, and the push frame pushes the circuit breaker handle to perform the closing action. At this time, the torsion spring completes energy storage. When the circuit breaker trips, the sleeve drives the square shaft to rotate in the opening direction, the compressed torsion spring releases energy, and the torsion spring drives the square shaft to rotate in the opening direction through the blocking component, so that the square shaft drives the handle to rotate to the trip position.

[0029] The above description is only one embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model; the scope of protection of the present utility model is defined by the claims in the claims, and all equivalent changes and modifications made in accordance with the utility model are within the scope of protection of the present utility model patent.

Claims

1. A manual operating mechanism for a circuit breaker in a drawer cabinet, comprising a handle, a square shaft, and a manual operating component mounted on the drawer of the drawer cabinet, wherein both ends of the square shaft are connected to bushings of the handle and the manual operating component, and the handle drives the manual operating component to perform opening and closing actions via the square shaft, characterized in that: It also includes an assist component mounted on the square shaft. The assist component includes a support plate mounted inside the drawer and a blocking member and an elastic member mounted on the square shaft in linkage. The elastic member is mounted between the blocking member and the support plate. When the square shaft rotates in the closing direction, the blocking member rotates with the square shaft and stores energy in the elastic member. When the circuit breaker trips and opens, the elastic member releases its energy, and the elastic force of the elastic member causes the blocking member to drive the square shaft to rotate in the opening direction.

2. The manual operating mechanism for a circuit breaker in a drawer cabinet according to claim 1, characterized in that: The elastic element is a torsion spring, the first torsion arm of the torsion spring abuts against the blocking element, and the second torsion arm of the torsion spring abuts against the support plate.

3. The manual operating mechanism for a circuit breaker in a drawer cabinet according to claim 2, characterized in that: The blocking member is provided with multiple adjustment slots for adjusting the spring force of the torsion spring, and the first torsion arm is engaged in one of the adjustment slots.

4. The manual operating mechanism for a circuit breaker in a drawer cabinet according to claim 2 or 3, characterized in that: The blocking member is detachably connected to a cover on the torsion spring, and the cover is provided with through holes through which the second torsion arm can pass.

5. The manual operating mechanism for a circuit breaker in a drawer cabinet according to claim 2 or 3, characterized in that: The blocking member has a sleeve portion on the side facing the pressure cap, the torsion spring is fitted onto the sleeve portion, and a square hole that engages with the square shaft is provided inside the sleeve portion.

6. The manual operating mechanism for a circuit breaker in a drawer cabinet according to claim 5, characterized in that: The blocking member is provided with a positioning ring that surrounds the sleeve portion, and the positioning ring is provided with a slot through which the first torsion arm can pass.

7. The manual operating mechanism for a circuit breaker in a drawer cabinet according to claim 6, characterized in that: The pressure cap has a protruding ring portion that abuts against the positioning ring, and a receiving cavity for placing a torsion spring is formed between the protruding ring portion and the sleeve portion.

8. The manual operating mechanism for a circuit breaker in a drawer cabinet according to claim 5, characterized in that: The pressure cap is provided with a through hole through which the sleeve part can pass. The sleeve part has multiple hooks distributed in a rectangular array. The multiple hooks pass through the through hole and engage with the pressure cap.

9. The manual operating mechanism for a circuit breaker in a drawer cabinet according to claim 1, characterized in that: The handle includes a handle seat mounted on the drawer and a rotating handle mounted on the handle seat. The handle seat is provided with a tripped tripping indicator, a tripped tripping indicator, and a closed indicator. The square shaft passes through the handle seat and is engaged in the locking hole of the rotating handle.

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