Quick closing mechanism for circuit breaker

Abstract

The utility model discloses a quick closing mechanism for a circuit breaker, which comprises a handle and an actuating mechanism which are arranged in a circuit breaker shell and are connected with each other, the actuating mechanism is connected with a moving contact, one side of the moving contact is provided with a static contact, the moving contact is rotatably connected on the actuating mechanism, a contact spring is connected between the moving contact and the actuating mechanism, and the static contact is arranged on the other side of the moving contact. One side of the moving contact is provided with an energy storage rod, and the moving contact is provided with a lap joint part used for buckling and connecting the energy storage rod; a trigger part is formed at one end of the energy storage rod, an energy storage spring is connected to the exterior of the trigger part, and an extrusion part is arranged on the handle on one side of the trigger part. According to the utility model, the switching-on speed of the moving contact can be improved, and the arc release amount generated in the switching-on process is reduced.

Description

Technical Field

[0001] The utility model relates to a circuit breaker, in particular to a quick closing mechanism for a circuit breaker. Background Art

[0002] As shown in the existing circuit breaker actuator in Patent 201810686547.X, a moving contact is connected to the actuator, and the outside of the actuator is connected to the circuit breaker handle through a U-shaped connecting rod; when the circuit breaker is closed, the handle drives the actuator to perform a closing action after rotation through the U-shaped connecting rod, and the moving contact moves synchronously in the direction of the static contact along with the closing action of the actuator; when the handle rotates to the closed state, the moving contact moves accordingly and fits with the static contact to achieve the closing effect.

[0003] However, the defect of this closing action is that a large amount of electric arc will be generated when the moving contact approaches the static contact, resulting in burn damage to the contact position and affecting the service life of both; so that the moving contact needs to increase its closing speed as much as possible when closing to reduce the amount of electric arc generated when the moving contact approaches the static contact. However, in the actual operation process, the closing position of the moving contact is directly related to the rotation position of the handle, and limited by the operation experience of the operator, it is caused that the operator does not necessarily quickly complete the closing action of the handle, that is, there are situations such as slow closing and shaking the handle to cause the moving contact to repeatedly contact the static contact, etc., and this will greatly increase the electric arc release amount during the closing process of the circuit breaker and reduce the service life of the circuit breaker.

[0004] Therefore, it is necessary to increase the closing speed of the moving contact during the closing process of the circuit breaker. Content of the Utility Model

[0005] The purpose of the utility model is to provide a quick closing mechanism for a circuit breaker. It can increase the closing speed of the moving contact and reduce the electric arc release amount generated during the closing process.

[0006] The technical solution of the utility model: A quick closing mechanism for a circuit breaker, including a handle and an actuator which are located in the circuit breaker housing and are connected to each other, a moving contact is connected to the actuator, a static contact is arranged on one side of the moving contact, the moving contact is rotatably connected to the actuator, a contact spring is connected between the moving contact and the actuator, a storage rod is arranged on one side of the moving contact, and a lapping part for snap-connecting the storage rod is arranged on the moving contact; one end of the storage rod forms a trigger part, a storage spring is connected to the outside of the trigger part, and a pressing part is arranged on the handle on one side of the trigger part.

[0007] In the foregoing quick closing mechanism for a circuit breaker, when the handle is in the open state, the lapping part and the storage rod are separated from each other, the storage spring is in contact with the trigger part and drives the storage rod to be in a contracted state, and the pressing part and the trigger part are separated from each other;

[0008] When the handle is in the initial rotation closing state, the handle drives the actuator to perform a closing action, and the moving contact moves synchronously with the actuator during closing. At the same time, the squeezing part moves towards the triggering part as the handle rotates and closes.

[0009] When the handle rotates to the energy storage state, the overlapping part engages with the energy storage rod as the moving contact moves, and there is a gap between the squeezing part and the triggering part. At this time, the moving contact is limited by the engagement of the energy storage rod and forms a relative rotation with the actuator during the subsequent closing action of the actuator, causing the contact spring to contract as the moving contact and the actuator rotate relative to each other.

[0010] When the handle rotates to the triggering state, the squeezing part rotates to fit with the triggering part and squeezes the triggering part as the handle continues to rotate and close. After being squeezed, the triggering part overcomes the elastic force of the energy storage spring and drives the energy storage rod to extend outwards, thus releasing the engagement limit on the moving contact. After the limit is released, the moving contact is quickly rotated towards the static contact by the elastic force of the contact spring until it completely fits with the static contact.

[0011] In the above-mentioned quick closing mechanism for a circuit breaker, when the handle performs an opening action, the squeezing part separates from the energy storage rod as the handle opens, and the energy storage spring drives the energy storage rod to contract again after rebounding, completing the reset of the energy storage rod.

[0012] In the above-mentioned quick closing mechanism for a circuit breaker, the energy storage spring is rotatably connected to the handle and one end is snap-connected to the circuit breaker housing, and the other end of the energy storage spring engages with the energy storage rod.

[0013] In the above-mentioned quick closing mechanism for a circuit breaker, a driving groove is provided on one side of the handle, the triggering part extends into the driving groove and is snap-connected to the energy storage spring, the squeezing part is the end side wall of the driving groove, and the squeezing part and the energy storage spring are respectively located on both sides of the triggering part.

[0014] In the above-mentioned quick closing mechanism for a circuit breaker, a U-shaped connecting rod is connected between the handle and the actuator, and both the energy storage spring and the driving groove are located on the side of the handle away from the U-shaped connecting rod.

[0015] In the above-mentioned quick closing mechanism for a circuit breaker, a slideway for slidably connecting the energy storage rod is provided on the circuit breaker housing, and the energy storage rod is snap-connected in the slideway.

[0016] Compared with the prior art, the present utility model has the following characteristics:

[0017] (1) Through the structural cooperation of the energy storage rod, the energy storage spring and the moving contact, the moving contact can enter the energy storage state during the closing process of the handle, that is, the contraction of the contact spring is formed; when the handle rotates to the trigger state, the energy storage rod releases the limit on the moving contact and the moving contact quickly moves and contacts the static contact under the action of the springback of the contact spring; with the above cooperation, the moving contact can quickly complete the closing action and will not stay at the arc trigger position restricted by the rotation position of the handle, thereby effectively reducing the amount of arc release generated during the closing process;

[0018] (2) By optimizing the connection structure and action of the energy storage rod, the present utility model can achieve the function of quickly closing the moving contact only by adding an energy storage rod and an energy storage spring on the basis of the existing circuit breaker, that is, effectively reducing the modification of the circuit breaker structure and the occupation of the internal space of the circuit breaker, and improving the applicability of the present utility model;

[0019] Therefore, the present utility model can improve the closing speed of the moving contact and reduce the amount of arc release generated during the closing process. Brief Description of the Drawings

[0020] Figure 1 is the installation schematic diagram of the present utility model;

[0021] Figure 2 is the structural schematic diagram of the present utility model in the open state;

[0022] Figure 3 is the structural schematic diagram of the present utility model in the energy storage state;

[0023] Figure 4 is the structural schematic diagram of the present utility model in the trigger state.

[0024] The reference signs in the drawings are: 1 - handle, 2 - actuator, 3 - moving contact, 4 - static contact, 5 - contact spring, 6 - energy storage rod, 7 - energy storage spring, 8 - extrusion part, 9 - drive groove, 10 - U-shaped connecting rod, 11 - slideway, 301 - overlapping part, 601 - trigger part. Detailed Embodiment

[0025] The following further describes the present utility model in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.

[0026] Embodiment. A quick closing mechanism for a circuit breaker, the composition is as Figures 1-4As shown in the figure, it includes a handle 1 and an actuator 2 which are located inside the circuit breaker housing and are connected to each other. A handle spring is connected to the handle 1, and a moving contact 3 is connected to the actuator 2. A static contact 4 is provided on one side of the moving contact 3. The moving contact 3 is rotatably connected to the actuator 2, and a contact spring 5 is connected between the moving contact 3 and the actuator 2. An energy storage rod 6 is provided on one side of the moving contact 3, and a latching portion 301 for latching and connecting the energy storage rod 6 is provided on the moving contact 3. A trigger portion 601 is formed at one end of the energy storage rod 6 away from the latching portion 301. An energy storage spring 7 is connected to the outside of the trigger portion 601. An extrusion portion 8 is provided on the handle 1 on one side of the trigger portion 601. The elastic force of the energy storage spring 7 is less than that of the handle spring.

[0027] When the handle 1 is in the open state, the latching portion 301 and the energy storage rod 6 are separated from each other. The energy storage spring 7 is in contact with the trigger portion 601 and drives the energy storage rod 6 to be in a contracted state, and there is a separation between the extrusion portion 8 and the trigger portion 601.

[0028] When the handle 1 is in the initial rotational closing state, the handle 1 drives the actuator 2 to perform a closing action, and the moving contact 3 moves synchronously with the closing of the actuator 2. At the same time, the extrusion portion 8 moves towards the trigger portion 601 with the rotational closing of the handle 1.

[0029] When the handle 1 rotates to the energy storage state, the latching portion 301 moves with the moving contact 3 and latches with the energy storage rod 6, and there is a gap between the extrusion portion 8 and the trigger portion 601. At this time, the moving contact 3 is rotationally limited by the latching of the energy storage rod 6 and forms a relative rotation with the actuator 2 with the subsequent closing action of the actuator 2, and the contact spring 5 contracts with the relative rotation of the moving contact 3 and the actuator 2.

[0030] When the handle 1 rotates to the trigger state, the extrusion portion 8 rotates to fit with the trigger portion 601, and squeezes the trigger portion 601 with the subsequent rotational closing action of the handle 1. After being squeezed, the trigger portion 601 overcomes the elastic force of the energy storage spring 7 and drives the energy storage rod 6 to extend outwards, thereby releasing the rotational limit on the moving contact 3. After the limit is released, the moving contact 3 rotates rapidly towards the static contact 4 under the elastic force of the contact spring 5 until it is completely in contact with the static contact 4.

[0031] When the handle 1 performs an opening action, the extrusion portion 8 separates from the energy storage rod 6 with the opening action of the handle 1, and the energy storage spring 7 drives the energy storage rod 6 to contract again after rebounding, completing the reset of the energy storage rod 6.

[0032] The energy storage spring 7 is rotatably connected to the handle 1 and is latched and connected to the circuit breaker housing at one end, and the other end of the energy storage spring 7 is latched with the energy storage rod 6.

[0033] On one side of the handle 1, there is an arc-shaped driving groove 9. The triggering part 601 extends into the driving groove 9 and is snap-connected to the energy storage spring 7. The pressing part 8 is the end side wall of the driving groove 9. The pressing part 8 and the energy storage spring 7 are respectively located on the left and right sides of the triggering part 601.

[0034] The handle 1 and the actuator 2 are connected to each other by a U-shaped connecting rod 10. The energy storage spring 7 and the driving groove 9 are both located on the side of the handle 1 away from the U-shaped connecting rod 10.

[0035] On the circuit breaker housing, there is a slideway 11 for slidably connecting the energy storage rod 6. The energy storage rod 6 is snap-connected in the slideway 11. The energy storage rod 6 can be limited by the slideway 11, so that the energy storage rod 6 can only move horizontally in the slideway 11.

[0036] In this embodiment, through the structural cooperation of the moving contact 3, the energy storage rod 6, the energy storage spring 7 and the handle, when the circuit breaker is in the initial closing state, the handle 1 and the actuator 2 can be closed in the conventional manner, and the moving contact 3 moves towards the end of the energy storage rod 6 with the closing action of the actuator 2. When the moving contact 3 rotates with the actuator 2 to be snap-connected to the energy storage rod 6, at this time, the moving contact 3 can be limited by the energy storage rod 6, so that the moving contact 3 cannot continue to move with the actuator 2 under the limiting action, and thus a relative rotation with the actuator 2 is formed. In this state, a safety gap is formed between the moving contact 3 and the static contact 4, that is, no arc release will occur.

[0037] After the moving contact 3 forms a rotation relative to the actuator 2, it drives the contact spring 5 to contract. The moving contact 3 enters the energy storage state, and the pressing part 8 continues to rotate towards the triggering part 601 with the closing action of the handle 1. When the pressing part 8 rotates to fit with the triggering part 601, the subsequent closing action of the pressing part 8 will press the triggering part 601, so that the triggering part 601 extends outwards against the elastic force of the energy storage spring 7 after being pressed, that is, the snap connection limit on the moving contact 3 is released.

[0038] After the moving contact 3 is released from the limit, it quickly rotates under the rebounding action of the contact spring 5 until it fits with the static contact 4. And under the above cooperation, the final closing action of the moving contact 3 is driven by the contact spring 5, rather than relying on the handle 1 to drive, thus effectively avoiding the influence of the closing speed of the handle 1 on the action of the moving contact 3, enabling the moving contact 3 to quickly complete closing, and thus reducing arc release.

Claims

1. A quick closing mechanism for a circuit breaker, comprising a handle (1) and an actuator (2) which are located inside the circuit breaker housing and are connected to each other. A moving contact (3) is connected to the actuator (2), and a static contact (4) is provided on one side of the moving contact (3). It is characterized in that: The moving contact (3) is rotatably connected to the actuator (2). A contact spring (5) is connected between the moving contact (3) and the actuator (2). One side of the moving contact (3) is provided with a energy storage rod (6), and a lapping portion (301) for buckling and connecting the energy storage rod (6) is provided on the moving contact (3); One end of the energy storage rod (6) forms a trigger portion (601), an energy storage spring (7) is connected to the outside of the trigger portion (601), and an extrusion portion (8) is provided on the handle (1) on one side of the trigger portion (601).

2. The quick closing mechanism for a circuit breaker according to claim 1, characterized in that: When the handle (1) is in the open state, the lapping portion (301) and the energy storage rod (6) are separated from each other, the energy storage spring (7) is in contact with the trigger portion (601) and drives the energy storage rod (6) to be in a contracted state, and the extrusion portion (8) and the trigger portion (601) are separated from each other; When the handle (1) is in the initial rotation closing state, the handle (1) drives the actuator (2) to perform a closing action, and the moving contact (3) moves synchronously with the closing of the actuator (2). At the same time, the extrusion portion (8) moves towards the trigger portion (601) with the rotation closing of the handle (1); When the handle (1) rotates to the energy storage state, the lapping portion (301) moves with the moving contact (3) and buckles with the energy storage rod (6), and there is a gap between the extrusion portion (8) and the trigger portion (601); At this time, the moving contact (3) is limited by the buckling of the energy storage rod (6) and forms a relative rotation with the actuator (2) with the subsequent closing action of the actuator (2), and the contact spring (5) contracts with the relative rotation of the moving contact (3) and the actuator (2); When the handle (1) rotates to the trigger state, the extrusion portion (8) rotates to fit with the trigger portion (601), and squeezes the trigger portion (601) with the subsequent rotation closing action of the handle (1). After being squeezed, the trigger portion (601) overcomes the elastic force of the energy storage spring (7) and drives the energy storage rod (6) to extend outwards, thereby releasing the buckling limit on the moving contact (3); After the limit is released, the moving contact (3) is driven by the elastic force of the contact spring (5) to quickly rotate towards the static contact (4) until it completely fits with the static contact (4).

3. The quick closing mechanism for a circuit breaker according to claim 1, wherein: When the handle (1) performs an open action, the extrusion portion (8) separates from the energy storage rod (6) with the open action of the handle (1), and the energy storage spring (7) drives the energy storage rod (6) to contract again after rebounding, completing the reset of the energy storage rod (6).

4. The quick closing mechanism for a circuit breaker according to claim 1, characterized in that: The energy storage spring (7) is rotatably connected to the handle (1) and one end is buckled and connected to the circuit breaker housing, and the other end of the energy storage spring (7) is buckled with the energy storage rod (6).

5. The quick closing mechanism for a circuit breaker according to claim 4, characterized in that: One side of the handle (1) is provided with a driving groove (9), the trigger portion (601) extends into the driving groove (9) and is buckled and connected to the energy storage spring (7), the extrusion portion (8) is the end side wall of the driving groove (9), and the extrusion portion (8) and the energy storage spring (7) are respectively located on both sides of the trigger portion (601).

6. The quick closing mechanism for a circuit breaker according to claim 5, wherein: A U-shaped connecting rod (10) is connected between the handle (1) and the actuator (2), and the energy storage spring (7) and the driving groove (9) are both located on the side of the handle (1) away from the U-shaped connecting rod (10).

7. The quick closing mechanism for a circuit breaker according to claim 1, wherein: A slideway (11) for slidably connecting an energy storage rod (6) is provided on the circuit breaker housing, and the energy storage rod (6) is snap-connected in the slideway (11).

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