Lock catch of circuit breaker

Abstract

The lock catch comprises a lock catch body, the lock catch body comprises a base, a first side plate and a second side plate, the first side plate and the second side plate are arranged on the two sides of the base respectively, a U-shaped working cavity used for containing a jump pin to move is formed among the base, the first side plate and the second side plate, a first reinforcing shaft is arranged on the first side plate, and a second reinforcing shaft is arranged on the second side plate. Openings in the two ends of the first reinforcing shaft are provided with mounting channels for mounting bolts for hinging the jump pin and the lock catch, hinge holes matched with the bolts are formed in the positions, corresponding to the mounting channels, of the second side plate, a first clamping part is arranged on the outer side of the first side plate, and the first clamping part comprises a plurality of mounting clamping grooves formed at equal intervals; a limiting part is further arranged on the outer side of the first side plate and arranged on the side, corresponding to the base, of the first clamping part. By adopting the technical scheme, the connection strength of the jump buckle and the lock catch is enhanced, the torsion spring is assembled and fixed more stably, and when the handle rotates, the stability of the torsion spring in the stress or recovery process is further improved, so that the jump stability of the handle is ensured.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to a circuit breaker latch. Background Technology

[0002] Circuit breakers, as a type of power distribution equipment, play a crucial role in protecting electrical equipment in the power grid. Specifically, when a fault occurs in the power grid, such as a short-circuit current or fault current, the circuit breaker interrupts the current to protect the electrical equipment and personnel in the grid. To achieve this protective function, an operating mechanism is installed inside the circuit breaker. By controlling the movement of the internal components of the operating mechanism, the moving and stationary contacts of the circuit breaker are separated, thereby cutting off the circuit. The locking mechanism is a vital transmission and control component within the operating mechanism.

[0003] With the improvement of circuit breaker performance indicators, the requirements for operating mechanisms are becoming increasingly stringent. Existing operating mechanisms generally have the following defects: 1. Due to space constraints, the locking lever is a single piece, and the part is thin and long. The force of the energy storage spring passing through the three-stage linkage of the closing tripping system (energy storage lever assembly, cam assembly, and locking lever) leads to a very large force on the locking lever, resulting in significant problems with the stability of its swing; 2. In the closing tripping system, the locking lever has only one fulcrum shaft, and this fulcrum shaft is fixed to a single side plate. After fatigue stress, the fulcrum shaft of the locking lever is prone to damage; 3. The tripping system usually includes a torsion spring, but the two ends of the torsion spring are simply set between the latch and the handle, which is prone to offset and slippage, significantly affecting the stable operation of the latch. Utility Model Content

[0004] Based on the above problems, the purpose of this utility model is to provide a locking mechanism for a circuit breaker.

[0005] To address the above problems, the following technical solution is provided: a circuit breaker latch, comprising a latch body, the latch body including a base and a first side plate and a second side plate respectively disposed on both sides of the base, the base and the first and second side plates forming a U-shaped working cavity for accommodating the movement of the trip latch, the first side plate being provided with a first reinforcing shaft for strengthening the connection with the base, the first reinforcing shaft having openings at both ends for mounting channels for installing pins for hinged trip latches and latches, the second side plate having hinge holes corresponding to the mounting channels for fitting the pins, the outer side of the first side plate being provided with a first locking part for mounting a first torsion spring connecting the handle and the latch, the first locking part including multiple equidistant mounting slots, the outer side of the first side plate also being provided with a limiting part for limiting the first torsion spring, the limiting part being disposed on one side of the base corresponding to the first locking part.

[0006] By adopting the above technical solution and setting a reinforcing shaft, compared with the existing lock hole directly hinged to the pin with two holes, the strength of the connection between the jump buckle and the lock buckle is strengthened, and the stability of the jump buckle swinging back and forth with the pin as the axis is improved. Since the first torsion spring is usually set on one side of the first side plate, compared with the existing torsion spring with both ends fastened to the hinge shaft of the base and the handle respectively, the technical solution of this utility model sets a first locking part on the outside of the first side plate to fix the first torsion spring, making the assembly and fixing of the torsion spring more stable. When the handle is rotated, the stability of the torsion spring during the force or recovery process is further improved. Multiple mounting slots are set. The torsion spring is prone to fatigue during long-term use. The installation position of the first torsion spring can be adjusted according to the different torques of the torsion spring, thereby ensuring the stability of the handle jumping.

[0007] The present invention further includes the following: the limiting part includes a first limiting segment for limiting the rotation angle of the handle and a second limiting segment for preventing the first torsion spring from deviating and disengaging from the mounting slot. The first limiting segment and the second limiting segment are arranged in an L-shape, and the second limiting segment is arranged parallel to the first side plate.

[0008] By adopting the above technical solution, the limiting part can limit the rotation angle of the handle and also prevent the first torsion spring from deviating from the mounting slot. The structure is simple and the effect is good.

[0009] The present invention further comprises: the base includes a stop block that abuts against the jumper and a mounting block disposed above the stop block; the mounting blocks are respectively arranged in right-angled triangles on both sides of the base; and the mounting blocks are provided with mounting holes for mounting micro sensors.

[0010] By adopting the above technical solution, the micro sensor can monitor the position of the jump buckle in real time. The mounting blocks are set on both sides above the abutment block. The mounting blocks are spaced far apart from the abutment block, which can avoid affecting the swing of the jump buckle and facilitate the installation of the micro sensor to monitor the jump buckle.

[0011] The present invention further includes a protective cover provided above the base, the length of which is adapted to the length of the abutment.

[0012] By adopting the above technical solution, impurities are prevented from entering between the stop block and the trip button, which could cause the trip button to accidentally trip or affect the smoothness of operation.

[0013] The present invention further includes: L-shaped abutment portions that abut against the base are respectively provided on both sides of the back of the latch body relative to the U-shaped working cavity; an annular mounting portion for fitting the second torsion spring is provided on the outer periphery of the first reinforcing shaft; and a limiting groove for installing one end of the second torsion spring is provided on the L-shaped abutment portion corresponding to one side of the first side plate.

[0014] By adopting the above technical solution, the L-shaped abutment part ensures that the base and the seat abut at a right angle, but the buckle and the seat are hinged and a second torsion spring is provided. Under the action of the second torsion spring, an elastic space is ensured between the buckle and the seat to rotate backward under force. When the buckle rotates, its force is large and it will not be stuck, further enhancing the stability of the buckle triggering and jumping out. The second torsion spring is sleeved on the outer periphery of the first reinforcing shaft, with one end locked in the limiting groove and the other end locked on the seat, ensuring the stability of the connection between the buckle and the seat.

[0015] The present invention further includes: a support portion for cooperating with the rotation of the handle is provided above the first side plate, and the support portion is provided with a rotating arc surface for cooperating with the rotation of the handle.

[0016] By adopting the above technical solution, when the handle is rotated to the designated position, the handle swings along the rotation arc surface, and the support part supports the handle, further enhancing the stability of the handle rotation.

[0017] The present invention is further provided that the base, the first side plate, the second side plate, the first locking part, the limiting part, and the supporting part are integrally formed.

[0018] By adopting the above technical solution, the one-piece molding achieves high strength. Attached Figure Description

[0019] Figure 1 The three-dimensional representation of this utility model Figure 1 .

[0020] Figure 2 The three-dimensional representation of this utility model Figure 2 .

[0021] Figure 3 The three-dimensional representation of this utility model Figure 3 .

[0022] The labels in the diagram have the following meanings: 1. Base, 11. U-shaped working cavity, 12. Abutment block, 13. Mounting block, 131. Mounting hole, 2. First side plate, 21. First reinforcing shaft, 211. Mounting channel, 212. Annular mounting part, 22. First locking part, 221. Mounting slot, 23. Limiting part, 231. First limiting section, 232. Second limiting section, 3. Second side plate, 31. Hinge hole, 4. Protective cover, 5. L-shaped abutment part, 51. Limiting slot, 6. Support part, 61. Rotating arc surface. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] Reference Appendix Figure 1-3 A circuit breaker latch includes a latch body, which includes a base 1 and a first side plate 2 and a second side plate 3 respectively disposed on both sides of the base 1. The base 1, the first side plate 2, and the second side plate 3 form a U-shaped working cavity 11 for accommodating the movement of the trip latch. The first side plate 2 is provided with a first reinforcing shaft 21 for reinforcing the connection with the base. The first reinforcing shaft 21 has openings at both ends for mounting channels 211 for mounting pins that connect the trip latch and the latch. The second side plate 3 is provided with hinge holes 31 that are adapted to the pins at the positions corresponding to the mounting channels 211. The outer side of the first side plate 2 is provided with a first locking part 22 for mounting a first torsion spring that connects the handle and the latch. The first locking part 22 includes a plurality of equidistant mounting slots 221. The outer side of the first side plate 2 is also provided with a limiting part 23 for limiting the first torsion spring. The limiting part 23 is disposed on one side of the first locking part 22 corresponding to the base 1.

[0025] This embodiment further includes the following configuration: the limiting part 23 includes a first limiting section 231 for limiting the rotation angle of the handle and a second limiting section 232 for preventing the first torsion spring from deviating from the mounting slot 221. The first limiting section 231 and the second limiting section 232 are arranged in an L-shape, and the second limiting section 232 is arranged parallel to the first side plate 2.

[0026] This embodiment further includes: the base 1 includes a stop block 12 that abuts against the jumper and a mounting block 13 disposed above the stop block 12. The mounting blocks 13 are respectively arranged in right-angled triangles on both sides of the base 1, and the mounting blocks 13 are provided with mounting holes 131 for mounting micro sensors.

[0027] This embodiment further includes a protective cover 4 above the base 1, the length of which is adapted to the length of the abutment block 12.

[0028] In this embodiment, the following configuration is further provided: L-shaped abutment portions 5 that abut against the base are respectively provided on both sides of the back of the latch body relative to the U-shaped working cavity 11; an annular mounting portion 212 for sleeved second torsion spring is provided on the outer periphery of the first reinforcing shaft 21; and a limiting groove 51 for installing one end of the second torsion spring is provided on the L-shaped abutment portion 5 corresponding to one side of the first side plate 2.

[0029] This embodiment further includes: a support part 6 for cooperating with the rotation of the handle is provided above the first side plate 2, and a rotating arc surface 61 for cooperating with the rotation of the handle is provided on the support part 6.

[0030] In this embodiment, the base 1, the first side plate 2, the second side plate 3, the first locking part 22, the limiting part 23, and the supporting part 6 are integrally formed.

[0031] Although this document frequently uses terms such as base 1, U-shaped working cavity 11, abutment 12, mounting block 13, mounting hole 131, first side plate 2, first reinforcing shaft 21, mounting channel 211, annular mounting part 212, first locking part 22, mounting slot 221, limiting part 23, first limiting segment 231, second limiting segment 232, second side plate 3, hinge hole 31, protective cover 4, L-shaped abutment part 5, limiting slot 51, support part 6, and rotating arc surface 61, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A latch for a circuit breaker, comprising a latch body, the latch body including a base and a first side plate and a second side plate respectively disposed on both sides of the base, wherein the base and the first side plate and the second side plate form a U-shaped working cavity for accommodating the movement of the trip latch, characterized in that: The first side plate is provided with a first reinforcing shaft for strengthening the connection with the base. The two ends of the first reinforcing shaft are provided with mounting channels for installing pins for mounting hinged latches and locks. The second side plate is provided with hinge holes adapted to the pins at the positions corresponding to the mounting channels. The outer side of the first side plate is provided with a first locking part for installing a first torsion spring for connecting the handle and the lock. The first locking part includes a plurality of equidistant mounting slots. The outer side of the first side plate is also provided with a limiting part for limiting the first torsion spring. The limiting part is located on one side of the base corresponding to the first locking part.

2. The locking mechanism of a circuit breaker according to claim 1, characterized in that: The limiting part includes a first limiting section for limiting the rotation angle of the handle and a second limiting section for preventing the first torsion spring from deviating and disengaging from the mounting slot. The first limiting section and the second limiting section are arranged in an L-shape, and the second limiting section is arranged parallel to the first side plate.

3. The locking mechanism of a circuit breaker according to claim 1, characterized in that: The base includes a stop block that abuts against the jumper and a mounting block disposed above the stop block. The mounting blocks are respectively arranged in right-angled triangles on both sides of the base, and the mounting blocks are provided with mounting holes for mounting micro sensors.

4. The latch of a circuit breaker according to claim 3, characterized in that: A protective cover is provided above the base, and the length of the protective cover is adapted to the length of the abutment.

5. The latch of a circuit breaker according to claim 1, characterized in that: The latch body has L-shaped abutment portions on both sides of the back of the U-shaped working cavity that abut against the base. The outer periphery of the first reinforcing shaft has an annular mounting portion for fitting the second torsion spring. The L-shaped abutment portion on the side corresponding to the first side plate has a limiting groove for mounting one end of the second torsion spring.

6. The locking mechanism of a circuit breaker according to claim 1, characterized in that: The first side plate is provided with a support part for cooperating with the rotation of the handle, and the support part is provided with a rotating arc surface for cooperating with the rotation of the handle.

7. The latch of a circuit breaker according to claim 6, characterized in that: The base, first side plate, second side plate, first locking part, limiting part, and supporting part are integrally formed.

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