Quick closing mechanism for circuit breaker

Abstract

The utility model discloses a quick closing mechanism for a circuit breaker, which comprises a handle (1) rotatably connected in a circuit breaker shell, the handle (1) and the circuit breaker shell are mutually connected through a handle spring (2), one side of the handle (1) is provided with a moving contact (3) connected with an actuating mechanism, the moving contact (3) is rotatably connected on the actuating mechanism, and the handle (1) is connected with the actuating mechanism. A contact spring (4) is connected between the moving contact (3) and the actuating mechanism, an energy storage piece (5) which is rotatably connected with a circuit breaker shell is arranged on the outer side of the moving contact (3), and the inner side of the energy storage piece (5) is attached to the handle spring (2). The utility model has the characteristics of simple structure and small occupied space.

Description

Technical Field

[0001] This utility model relates to a circuit breaker, and more particularly to a quick-closing mechanism for a circuit breaker. Background Technology

[0002] Because a large amount of electric arc is generated when the moving contact approaches the stationary contact, causing burn-in at the contact point and affecting the service life of both, the moving contact needs to close as quickly as possible during operation to reduce the amount of electric arc generated when it approaches the stationary contact. However, due to the limitations of conventional circuit breaker closing operations, the rotation position of the moving contact is directly related to the rotation position of the handle. Consequently, when operators perform improper operations such as slow closing or shaking the handle, the moving contact is prone to repeatedly contacting the stationary contact, significantly increasing the amount of electric arc released during the circuit breaker's closing process and reducing its service life.

[0003] Based on this, patent 202411231666.8 discloses a quick-closing mechanism for circuit breakers. This mechanism stores energy in the contact spring during the initial closing phase of the handle and releases the restriction on the moving contact when the handle is rotated to the trigger position, thereby utilizing the spring's rebound force to quickly close the moving contact. While this structure can reliably achieve the function of quickly closing the moving contact, its structure and operation limitations inevitably lead to two issues: firstly, it requires additional space in the circuit breaker, increasing its thickness; secondly, because the quick-closing mechanism is hidden inside the actuator, it increases the difficulty of assembly for manufacturers.

[0004] Therefore, existing circuit breaker fast-closing mechanisms suffer from complex structures and large space requirements. Utility Model Content

[0005] The purpose of this invention is to provide a quick-closing mechanism for circuit breakers. It features a simple structure and small footprint.

[0006] The technical solution of this utility model: a quick closing mechanism for a circuit breaker, including a handle rotatably connected inside the circuit breaker housing, the handle and the circuit breaker housing being connected to each other via a handle spring, a moving contact connected to an actuator on one side of the handle, the moving contact being rotatably connected to the actuator, a contact spring connecting the moving contact and the actuator, an energy storage component rotatably connected to the circuit breaker housing on the outer side of the moving contact, and the inner side of the energy storage component being in contact with the handle spring;

[0007] The handle spring is used to limit the energy storage device, so that the energy storage device is in the energy storage position;

[0008] The energy storage component is used to engage and limit the moving contact when in the energy storage position, so that the contact spring contracts after the moving contact is limited and with the subsequent closing action of the actuator.

[0009] The handle is used to squeeze the energy storage device during the closing process, so that the energy storage device overcomes the elastic force of the handle spring and releases the locking limit of the moving contact under the squeezing action.

[0010] In the aforementioned quick-closing mechanism for circuit breakers, one end of the handle spring extends to the outside of the handle and forms a reset rod, and the inner side of the energy storage element is in contact with the reset rod via the energy storage rod.

[0011] In the aforementioned quick-closing mechanism for circuit breakers, a fastening groove is formed on one side of the energy storage element, and one side of the moving contact extends to the outside of the actuator and forms a limiting part for fastening the fastening groove.

[0012] In the aforementioned quick-closing mechanism for circuit breakers, the energy storage element forms a pressure-bearing part on the side away from the fastening groove, and the handle on the side of the pressure-bearing part is provided with a pressing part that cooperates with the pressure-bearing part.

[0013] In the aforementioned quick-closing mechanism for circuit breakers, the handle on one side of the compression section is provided with an intercepting surface that cooperates with the energy storage component. The intercepting surface is used to limit the rotation of the energy storage component so that the energy storage component is in the energy storage position.

[0014] In the aforementioned quick-closing mechanism for circuit breakers, the intercepting surface is arc-shaped, the pressure-bearing part is V-shaped, and the two sides of the pressure-bearing part are respectively formed with a first contact surface for fitting the intercepting surface and a second contact surface for contacting the pressing part.

[0015] Compared with the prior art, this utility model has the following characteristics:

[0016] (1) Through the structural cooperation of the handle, handle spring and energy storage component, the energy storage component can be limited to the energy storage position by the handle spring when the circuit breaker is opened, and is limited during the rotation of the moving contact, so that the moving contact rotates relative to the actuator under the limiting action and drives the contact spring to contract, thereby realizing the energy storage function; when the handle is rotated to the close position, it will squeeze the energy storage component, so that the energy storage component separates from the moving contact after being compressed, and the rebound force of the contact spring drives the moving contact to close quickly, thereby realizing its rapid closing function; with the above cooperation, this application only needs to add one part, the energy storage component, on the basis of the existing circuit breaker, and will not occupy the thickness space of the circuit breaker, effectively reducing the space occupied by this utility model;

[0017] (2) By limiting the structure of the pressure part, the intercepting surface and the squeezing part, the energy storage component can be limited by the intercepting surface in the open state of the handle and in the early rotation process. Then, the energy storage component is clamped and fixed from both sides with the handle spring, which effectively prevents the free shaking of the energy storage component and ensures its limiting function.

[0018] Therefore, this utility model has the characteristics of simple structure and small space occupation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model in the open state;

[0020] Figure 2 yes Figure 1 A magnified view from direction A;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model in the closed state;

[0022] Figure 4 This is an exploded view of this utility model.

[0023] The markings in the attached diagram are as follows: 1-handle, 2-handle spring, 3-moving contact, 4-contact spring, 5-energy storage component, 101-pressing part, 102-intercepting surface, 201-reset rod, 301-limiting part, 501-energy storage rod, 502-fastening groove, 503-pressure-bearing part. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0025] Example. The circuit breaker uses a quick-closing mechanism, configured as follows: Figure 1 As shown, the circuit includes a handle 1 rotatably connected inside the circuit breaker housing. The handle 1 and the circuit breaker housing are connected to each other via a handle spring 2. One side of the handle 1 is provided with a moving contact 3 connected to the actuator. The moving contact 3 is rotatably connected to the actuator. A contact spring 4 is connected between the moving contact 3 and the actuator. The contact spring 4 is used to apply a clockwise elastic force to the moving contact 3. An energy storage element 5 rotatably connected to the circuit breaker housing is provided on the outside of the moving contact 3. The inner side of the energy storage element 5 is in contact with the handle spring 2.

[0026] The handle spring 2 is used to elastically limit the energy storage component 5 in the counterclockwise rotation direction, so that the energy storage component 5 is in the energy storage position;

[0027] The energy storage component 5 is used to engage and limit the moving contact 3 when it is in the energy storage position, so that the contact spring 4 contracts after the moving contact 3 is limited and the actuator performs a subsequent closing action.

[0028] The handle 1 is used to squeeze the energy storage component 5 during the closing process, so that the energy storage component 5 overcomes the elastic force of the handle spring 2 under the squeezing action and releases the locking limit of the moving contact 3.

[0029] One end of the handle spring 2 extends to the outside of the handle 1 and forms a reset rod 201. The middle or end of the reset rod 201 is fastened to the circuit breaker housing. The inner side of the energy storage component 5 is attached to the reset rod 201 via the energy storage rod 501. The reset rod 201 leaves a deformation allowance at the attachment point for the energy storage component 5 to rotate counterclockwise.

[0030] One side of the energy storage component 5 forms a fastening groove 502, and one side of the moving contact 3 extends to the outside of the actuator and forms a limiting part 301 for fastening and connecting the fastening groove 502.

[0031] The energy storage component 5 has a pressure-receiving part 503 on the side away from the fastening groove 502, and the handle 1 on the side of the pressure-receiving part 503 is provided with a squeezing part 101 that cooperates with the pressure-receiving part 503.

[0032] The handle 1 on one side of the extrusion part 101 is provided with an intercepting surface 102 that cooperates with the energy storage component 5. The intercepting surface 102 is used to limit the clockwise rotation of the energy storage component 5 so that the energy storage component 5 is in the energy storage position.

[0033] The intercepting surface 102 has an arc shape, and the pressure-receiving part 503 has a V shape. The two sides of the pressure-receiving part 503 respectively form a first contact surface for adhering to the intercepting surface 102 and a second contact surface for contacting the pressing part 101.

[0034] The working principle of this utility model is as follows: When the circuit breaker is in the open state, the handle 1 is attached to the intercepting surface 102 and the pressure-bearing part 503 to form a clockwise rotation limit. The reset rod 201 and the energy storage rod 501 are attached to each other to form a counterclockwise rotation limit. Under the action of the two, the energy storage component 5 maintains a stable energy storage position and is separated from the limit part 301.

[0035] When the operator controls handle 1 to close the circuit, the actuator rotates the handle, causing the moving contact 3 to rotate clockwise. Simultaneously, the intercepting surface 102 remains in a limiting position on the energy storage component 5 as the handle rotates, keeping the energy storage component 5 in its energy-storing position. When the moving contact 3 rotates until the limiting part 301 and the engaging groove 502 are in contact, the moving contact 3 remains stationary due to the limiting position of the engaging groove 502. The actuator continues to rotate with the subsequent closing action of handle 1, creating a relative rotation between the actuator and the moving contact 3, which in turn causes the contact spring 4 to contract, thus achieving the energy storage function.

[0036] When the handle 1 is rotated to near the closing position, the pressing part 101 presses against the pressure receiving part 503, causing the energy storage member 5 to overcome the spring force of the reset rod 201 and rotate until it separates from the limiting part 301, thus releasing the limiting part 301. After the limiting part 301 is released, the retracted contact spring 4 rebounds and drives the moving contact 3 to quickly contact the stationary contact, achieving a rapid closing function.

Claims

1. A quick-closing mechanism for a circuit breaker, comprising a handle (1) rotatably connected within the circuit breaker housing, the handle (1) and the circuit breaker housing being interconnected via a handle spring (2), and a moving contact (3) for connecting an actuator being provided on one side of the handle (1), characterized in that: The moving contact (3) is rotatably connected to the actuator. A contact spring (4) is connected between the moving contact (3) and the actuator. An energy storage component (5) that is rotatably connected to the circuit breaker housing is provided on the outside of the moving contact (3). The inner side of the energy storage component (5) is in contact with the handle spring (2). The handle spring (2) is used to limit the energy storage component (5) so that the energy storage component (5) is in the energy storage position; The energy storage component (5) is used to engage and limit the moving contact (3) when in the energy storage position, so that the contact spring (4) contracts after the moving contact (3) is limited and the actuator performs a subsequent closing action. The handle (1) is used to squeeze the energy storage component (5) during the closing process, so that the energy storage component (5) overcomes the elastic force of the handle spring (2) and releases the locking limit of the moving contact (3) under the squeezing action.

2. The quick-closing mechanism for a circuit breaker according to claim 1, characterized in that: One end of the handle spring (2) extends to the outside of the handle (1) and forms a reset rod (201). The inner side of the energy storage component (5) is attached to the reset rod (201) via the energy storage rod (501).

3. The quick-closing mechanism for a circuit breaker according to claim 1, characterized in that: One side of the energy storage component (5) forms a fastening groove (502), and one side of the moving contact (3) extends to the outside of the actuator and forms a limiting part (301) for fastening the fastening groove (502).

4. The quick-closing mechanism for a circuit breaker according to claim 1, characterized in that: The energy storage component (5) has a pressure-receiving part (503) on the side away from the fastening groove (502), and a pressing part (101) that cooperates with the pressure-receiving part (503) is provided on the handle (1) on the side of the pressure-receiving part (503).

5. The quick-closing mechanism for a circuit breaker according to claim 4, characterized in that: The handle (1) on one side of the extrusion part (101) is provided with an intercepting surface (102) that cooperates with the energy storage component (5). The intercepting surface (102) is used to limit the rotation of the energy storage component (5) so that the energy storage component (5) is in the energy storage position.

6. The quick-closing mechanism for a circuit breaker according to claim 5, characterized in that: The intercepting surface (102) has an arc shape, and the pressure-receiving part (503) has a V shape. The two sides of the pressure-receiving part (503) are respectively formed with a first contact surface for adhering to the intercepting surface (102) and a second contact surface for adhering to the squeezing part (101).

Images