Circuit breaker closing limiting device and circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker closing limiting device and a circuit breaker, which comprises a circuit breaker body, a lock catch used for opening or closing with the circuit breaker body is rotatably arranged in the circuit breaker, a connecting shaft is rotatably arranged in the circuit breaker body, and the connecting shaft is connected with the lock catch. A cam capable of limiting rotation of the lock catch is fixedly arranged on the connecting shaft, and when a convex part of the cam abuts against the lock catch in an open circuit state, the cam can limit rotation closing of the lock catch; the circuit breaker body is also internally provided with a transmission assembly which is used for driving the cam to rotate. The trigger assembly is used for driving the transmission assembly to move. The transmission assembly is driven to move through the arranged trigger assembly, the transmission assembly moves to drive the cam to rotate, and when the convex part of the cam abuts against the lock catch in the open circuit state, the cam can limit the lock catch to rotate to be closed, so that when an operator manually repairs the circuit breaker, the operator cannot be damaged due to closing of the circuit breaker.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker closing restriction device and a circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can close, carry, and interrupt the current under abnormal circuit conditions within a specified time. It plays a very important protective role in the circuit. For example, when faults such as overload (excessive current) and short circuit occur in the circuit, the circuit breaker can quickly cut off the circuit to prevent the expansion of the fault, avoid damage to electrical equipment, and prevent dangerous situations such as possible fires.

[0003] Existing circuit breakers can perform opening and closing operations manually and electrically. When operating personnel perform inspection and maintenance on the circuit breaker offline, the circuit breaker should be kept in the open state to avoid electric current injuring the operating personnel. If the circuit breaker performs a closing operation during the circuit maintenance process, serious personal and property losses will be caused. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a circuit breaker closing restriction device and a circuit breaker to solve the above deficiencies in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A circuit breaker closing restriction device includes a circuit breaker body. A latch for opening or closing the circuit breaker body is rotatably provided in the circuit breaker. A connecting shaft is rotatably provided in the circuit breaker body. A cam for restricting the rotation of the latch is fixedly provided on the connecting shaft. When the convex part of the cam abuts against the latch in the open state, the cam can restrict the latch from rotating to close; A transmission component is further provided in the circuit breaker body for driving the cam to rotate; A trigger component is further included for driving the transmission component to move.

[0007] Further, the transmission component includes a worm gear fixedly provided on the connecting shaft. A worm is meshed and connected to the worm gear. The worm is rotatably provided in the circuit breaker body. The worm is connected to the trigger component.

[0008] Further, the trigger component includes a key. A keyhole adapted to the key is provided at the end of the worm. The key passes through an opening on the circuit breaker body and is inserted into the keyhole to drive the worm to rotate.

[0009] Further, a block for covering the opening is slidably connected to the circuit breaker body. A push rod is fixedly provided on the baffle. The push rod is slidably connected to the circuit breaker body.

[0010] A circuit breaker, the circuit breaker includes the circuit breaker closing restriction device of any one of the above.

[0011] In the above technical solution, the beneficial effects of the circuit breaker closing restriction device and the circuit breaker provided by the present utility model are as follows:

[0012] Through the arranged trigger assembly, the transmission assembly is driven to move. The movement of the transmission assembly drives the cam to rotate. When the convex part of the cam abuts against the latch in the open state, the cam can restrict the rotation and closing of the latch, so that when the operator manually repairs the circuit breaker, they will not be injured due to the closing of the circuit breaker, eliminating potential safety hazards.

[0013] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0014] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a complete disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the circuit breaker provided by an embodiment of the present utility model;

[0018] Figure 3 It is a schematic diagram of a partial enlarged structure A provided by an embodiment of the present utility model.

[0019] Description of the reference numerals:

[0020] 1. Circuit breaker body; 11. Latch; 2. Connecting shaft; 21. Cam; 31. Worm gear; 32. Worm; 33. Lock hole; 4. Push rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present disclosure with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0022] Please refer to Figures 1-3 , a circuit breaker closing limiting device, including a circuit breaker body 1. A latch 11 for opening or closing the circuit breaker body 1 is rotatably provided in the circuit breaker. A connecting shaft 2 is rotatably provided in the circuit breaker body 1. A cam 21 capable of restricting the rotation of the latch 11 is fixedly provided on the connecting shaft 2. When the convex part of the cam 21 abuts against the latch 11 in the open state, the cam 21 can restrict the latch 11 from rotating and closing; a transmission assembly is further provided in the circuit breaker body 1 for driving the cam 21 to rotate; and a trigger assembly is further included for driving the transmission assembly to move.

[0023] By providing the trigger assembly to drive the transmission assembly to move, the transmission assembly drives the cam 21 to rotate. When the convex part of the cam 21 abuts against the latch 11 in the open state, the cam 21 can restrict the latch 11 from rotating and closing, so that when an operator manually repairs the circuit breaker, the operator will not be injured due to the closing of the circuit breaker, eliminating potential safety hazards.

[0024] Further, the transmission assembly includes a worm gear 31 fixedly provided on the connecting shaft 2. A worm 32 is meshed with the worm gear 31. The worm 32 is rotatably provided in the circuit breaker body 1. The worm 32 is connected to the trigger assembly.

[0025] The trigger assembly drives the worm 32 to rotate. The worm 32 drives the worm gear 31 to rotate. The worm gear 31 drives the cam 21 to rotate through the connecting shaft 2, so that the cam 21 limits the latch 11. And due to the self-locking property of the worm gear 31 and the worm 32, the cam 21 can maintain the locking effect on the latch 11, which is convenient for the operator to use.

[0026] Further, the trigger assembly includes a key. A keyhole 33 adapted to the key is provided at the end of the worm 32. The key passes through an opening on the circuit breaker body 1 and is inserted into the keyhole 33 to drive the worm 32 to rotate. The operator drives the worm 32 to rotate through the key, which can prevent other people from deliberately keeping the circuit breaker open, playing a protective role.

[0027] Further, a stopper for blocking the opening is slidably connected to the circuit breaker body 1. A push rod 4 is fixedly provided on the baffle, and the push rod 4 is slidably connected to the circuit breaker body 1. The stopper can prevent external objects from entering the circuit breaker body 1 through the opening. There is friction between the stopper and the circuit breaker body 1, so that the stopper will not slide and expose the opening when blocking the opening.

[0028] A circuit breaker, which includes the circuit breaker closing limiting device according to any one of the above.

[0029] Working principle: When an operator inspects and repairs the circuit breaker, insert the key into the keyhole 33 on the worm 32 and drive the worm 32 to rotate. The rotation of the worm 32 drives the worm wheel 31 to rotate. The rotation of the worm wheel 31 drives the cam 21 to rotate through the connecting shaft 2. When the convex part of the cam 21 abuts against the latch 11 in the open state, the cam 21 can limit the rotation and closing of the latch 11, so that when the operator manually repairs the circuit breaker, they will not be harmed by the closing of the circuit breaker, eliminating potential safety hazards.

[0030] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A circuit breaker closing restriction device, comprising a circuit breaker body (1), wherein a lock (11) is rotatably provided inside the circuit breaker for opening or closing the circuit breaker body (1), characterized in that: A connecting shaft (2) is rotatably provided in the circuit breaker body (1), and a cam (21) capable of limiting the rotation of the lock catch (11) is fixedly provided on the connecting shaft (2), and when the convex portion of the cam (21) abuts against the lock catch (11) in the circuit-breaking state, the cam (21) can limit the rotation of the lock catch (11) to close the circuit; A transmission assembly is also provided in the circuit breaker body (1), which is used to drive the cam (21) to rotate; It also includes a trigger component, which is used to drive the transmission component to move.

2. A circuit breaker closing limiting device according to claim 1, characterized in that: The transmission assembly comprises a worm wheel (31) fixedly arranged on a connecting shaft (2), a worm (32) meshingly connected to the worm wheel (31), the worm (32) rotatably arranged in a circuit breaker body (1), and the worm (32) is connected to a trigger assembly.

3. A circuit breaker closing limiting device according to claim 2, characterized in that: The trigger assembly comprises a key. The end of the worm (32) is provided with a lock hole (33) adapted to the key. The key passes through an opening on the circuit breaker body (1) and is inserted into the lock hole (33), thereby driving the worm (32) to rotate.

4. A circuit breaker closing restriction device according to claim 3, characterized in that: A block for covering the opening is slidably connected to the circuit breaker body (1), a push rod (4) is fixedly provided on the block, and the push rod (4) is slidably connected to the circuit breaker body (1).

5. A circuit breaker, characterized in that: The circuit breaker comprises the circuit breaker closing limiting device according to any one of claims 1 to 4.

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