Moving contact assembly and circuit breaker

Abstract

The utility model discloses a moving contact assembly and a circuit breaker. The moving contact assembly comprises a wiring board, an arc striking part, a contact piece assembly and a first connecting piece, the arc striking part is used for assisting arc extinguishing, the first connecting piece is a flexible connecting piece, the arc striking part and the first connecting piece are both arranged on the wiring board, and the contact piece assembly is connected with the first connecting piece; the contact piece assembly comprises a contact piece, a second connecting piece, a jump pin, a spring and a fixing pin, the contact piece is fixedly connected to the first connecting piece, one end of the second connecting piece is rotationally connected with the contact piece, the other end of the second connecting piece is rotationally connected with the jump pin, and the fixing pin penetrates through the contact piece and is rotationally connected with the contact piece so that the contact piece can rotate with the fixing pin as a rotating shaft. One end of the spring is arranged at the corresponding installation position, the other end of the spring is connected with the second connecting piece, the first connecting piece, the second connecting piece, the jump pin and the spring cooperate, excessive connection is avoided, the action is accurate, abrasion of parts caused by impact can be reduced, and the service life of the moving contact assembly is prolonged.

Description

Technical Field

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

[0002] In electrical equipment such as circuit breakers, moving contacts need to work with stationary contacts to switch circuits on and off, and their performance directly determines the operational stability of the equipment. Existing moving contacts mostly use rigid connections to transmit driving force, and the oscillating impact can easily lead to contact deformation and wear of the contact surface; moreover, they lack effective limiting structures, resulting in uncontrolled oscillation angles of the moving contacts. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a moving contact assembly and circuit breaker to solve the problem of increased resistance and local heating caused by contact deformation due to rigid connection.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a moving contact assembly, including a terminal block, an arc-initiating part, a contact assembly, and a first connecting member; the arc-initiating part is used to assist in arc extinguishing, the first connecting member is a flexible connecting member, both the arc-initiating part and the first connecting member are disposed on the terminal block, and the contact assembly is connected to the first connecting member; the contact assembly includes a contact, a second connecting member, a jumper, a spring, and a fixing pin, the contact is fixedly connected to the first connecting member, one end of the second connecting member is rotatably connected to the contact, and the other end is rotatably connected to the jumper, the fixing pin passes through the contact and is rotatably connected to the contact, allowing the contact to rotate about the fixing pin as a pivot, one end of the spring is disposed at a corresponding installation position, and the other end is connected to the second connecting member.

[0005] When the latch is pulled open, it causes the second connector to rotate, which in turn causes the contact piece to rotate around the fixed pin. The spring is stretched, maintaining the tendency of the second connector to move the contact piece closer to the external stationary contact; or...

[0006] When the jumper is pushed down, the jumper causes the second connector to rotate, and the second connector causes the contact piece to rotate around the fixed pin as the pivot. The spring is stretched and maintains the tendency of the second connector to move the contact piece away from the external stationary contact.

[0007] As a further improvement of this utility model, it also includes a movable pin. The contact piece is provided with an oblong hole with an arc-shaped edge. The second connector is provided with a through hole at the position corresponding to the oblong hole. The movable pin passes through the oblong hole and the through hole. The movable pin guides the second connector along the extension direction of the oblong hole.

[0008] As a further improvement of this utility model, the jump buckle is provided with an arc-shaped groove, and the second connector is provided with an arc-shaped edge at the position corresponding to the arc-shaped groove.

[0009] As a further improvement of this utility model, the second connector has an arc-shaped notch at the position corresponding to the fixing pin.

[0010] As a further improvement of this utility model, the contact piece and the second connecting member are connected by a rotatable riveting method.

[0011] As a further improvement of this utility model, the arc-initiating part is provided with an arc-shaped structure distributed along its extension direction, and the arc-shaped structure is used to lengthen the arc path.

[0012] As a further improvement of this utility model, the first connector is configured as a U-shaped connector.

[0013] A circuit breaker is also provided that employs the aforementioned moving contact assembly.

[0014] The beneficial effects of this utility model are that the first connector, the second connector, the jumper and the spring work together to avoid over-connection, ensure precise action, reduce wear on the components caused by impact, and extend the service life of the moving contact assembly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first state of the spring in an embodiment of this utility model;

[0016] Figure 2 This is a schematic diagram of the second state of the spring in an embodiment of the present invention;

[0017] Figure 3 This is a perspective view of an embodiment of the present utility model;

[0018] Figure 4 This is a disassembly diagram of the contact assembly in an embodiment of the present utility model.

[0019] Reference numerals: 1. Terminal block; 2. Arc-leading part; 3. First connector; 4. Contact piece; 5. Second connector; 6. Jumper clip; 7. Spring; 8. Fixed pin; 9. Movable pin; 10. Waist-shaped hole; 11. Through hole; 12. Arc-shaped groove; 13. Arc-shaped notch; 14. Arc-shaped edge. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0021] Reference Figure 1-4As shown, a moving contact assembly includes a terminal block 1, an arc-initiating part 2, a contact assembly, and a first connecting member 3. The arc-initiating part 2 is used to assist in arc extinguishing. The first connecting member 3 is a flexible connector. Both the arc-initiating part 2 and the first connecting member 3 are mounted on the terminal block 1. The contact assembly is connected to the first connecting member 3. The contact assembly includes a contact 4, a second connecting member 5, a jumper 6, a spring 7, and a fixing pin 8. The contact 4 is fixedly connected to the first connecting member 3. One end of the second connecting member 5 is rotatably connected to the contact 4, and the other end is rotatably connected to the jumper 6. The fixing pin 8 passes through the contact 4 and is rotatably connected to the contact 4, allowing the contact 4 to rotate about the fixing pin 8 as a pivot. One end of the spring 7 is located at a corresponding mounting position, and the other end is connected to the second connecting member 5.

[0022] When the jumper 6 is pulled open, the jumper 6 drives the second connector 5 to rotate, and the second connector 5 drives the contact piece 4 to rotate around the fixed pin 8. The spring 7 is stretched and maintains the tendency of the second connector 5 to drive the contact piece 4 to move closer to the external stationary contact.

[0023] In this embodiment, the first connector 3 adopts a flexible connection design, which can deform naturally when subjected to force to adapt to the movement stroke of the contact assembly;

[0024] Reference Figure 1 As shown, when the latch 6 is pulled open, the latch 6 rotates clockwise, causing the second connecting piece 5 to rotate counterclockwise. The second connecting piece 5 then causes the contact piece 4 to rotate counterclockwise around the fixing pin 8, stretching the spring 7.

[0025] When the jumper 6 is pushed down, the jumper 6 drives the second connector 5 to rotate, and the second connector 5 drives the contact piece 4 to rotate around the fixed pin 8. The spring 7 is stretched and maintains the tendency of the second connector 5 to drive the contact piece 4 away from the external stationary contact.

[0026] Reference Figure 2 As shown, when the jumper 6 is pushed down, the jumper 6 rotates counterclockwise and drives the second connector 5 to rotate clockwise. The second connector 5 drives the contact piece 4 to rotate clockwise around the fixed pin 8, and the spring 7 is stretched.

[0027] Furthermore, it also includes a movable pin 9, a waist-shaped hole 10 on the contact piece 4 with an arc-shaped edge, and a through hole 11 on the second connector 5 corresponding to the position of the waist-shaped hole 10. The movable pin 9 passes through the waist-shaped hole 10 and the through hole 11; and the movable pin 9 guides the second connector 5 along the extension direction of the waist-shaped hole 10.

[0028] In this embodiment, the contact piece 4 and the second connector 5 are connected by a movable pin 9, which strengthens the connection between the contact piece 4 and the second connector 5. The movable pin 9 is guided along the extension direction of the waist-shaped hole 10, which can limit the movement trajectory of the second connector 5 and improve the reliability of the contact between the contact piece 4 and the stationary contact. The edge of the waist-shaped hole 10 is set to be arc-shaped, which is also more suitable for the movement stroke of the second connector 5.

[0029] Preferably, the snap fastener 6 is provided with an arc-shaped groove 12, and the second connector 5 is provided with an arc-shaped edge 14 at the position corresponding to the arc-shaped groove 12.

[0030] In this embodiment, the arc-shaped groove 12 of the jump buckle 6 and the arc-shaped edge of the second connector 5 form a close-fitting guide fit, which avoids misalignment collision or rigid impact during movement, and improves the stability of movement and service life.

[0031] Furthermore, the second connector 5 has an arc-shaped notch 13 at the position corresponding to the fixing pin 8.

[0032] In this embodiment, the second connector 5 can increase its travel by avoiding the fixing pin 8 through the arc-shaped notch 13.

[0033] Preferably, the contact piece 4 and the second connector 5 are connected by a rotatable riveting method.

[0034] In this embodiment, the fixing characteristics of riveting can prevent the connection from loosening, balance the flexibility of movement and the structural stability, and reduce the risk of failure after long-term use.

[0035] Furthermore, the arc-initiating part 2 is provided with an arc-shaped structure distributed along its extension direction, the arc-shaped structure being used to lengthen the arc path.

[0036] In this embodiment, the arc gap resistance increases after the arc is elongated, which can prevent the arc from reigniting and improve the breaking capacity and operational safety of the circuit breaker.

[0037] Preferably, the first connector 3 is configured as a U-shaped connector.

[0038] In this embodiment, the U-shaped structure has better elastic deformation performance and more uniform deformation under stress, which can better adapt to the movement stroke of the contact assembly and avoid the risk of breakage caused by stress concentration.

[0039] A circuit breaker is also provided that employs the aforementioned moving contact assembly.

[0040] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A moving contact assembly, characterized in that, The device includes a terminal block, an arc-starting section, a contact assembly, and a first connector. The arc-starting section assists in arc extinguishing. The first connector is a flexible connector. Both the arc-starting section and the first connector are mounted on the terminal block. The contact assembly is connected to the first connector. The contact assembly includes a contact, a second connector, a jumper, a spring, and a fixing pin. The contact is fixedly connected to the first connector. One end of the second connector is rotatably connected to the contact, and the other end is rotatably connected to the jumper. The fixing pin passes through the contact and is rotatably connected to it, allowing the contact to rotate about the fixing pin as a pivot. One end of the spring is positioned at a corresponding location, and the other end is connected to the second connector. When the latch is pulled open, it causes the second connector to rotate, which in turn causes the contact piece to rotate around the fixed pin. The spring is stretched, maintaining the tendency of the second connector to move the contact piece closer to the external stationary contact; or... When the jumper is pushed down, the jumper causes the second connector to rotate, and the second connector causes the contact piece to rotate around the fixed pin as the pivot. The spring is stretched and maintains the tendency of the second connector to move the contact piece away from the external stationary contact.

2. The moving contact assembly according to claim 1, characterized in that, It also includes a movable pin, the contact piece is provided with an oblong hole with an arc-shaped edge, the second connector is provided with a through hole at the position corresponding to the oblong hole, the movable pin passes through the oblong hole and the through hole; and the movable pin guides the second connector along the extension direction of the oblong hole.

3. The moving contact assembly according to claim 1, characterized in that, The jump buckle is provided with an arc-shaped groove, and the second connector is provided with an arc-shaped edge at the position corresponding to the arc-shaped groove.

4. The moving contact assembly according to claim 1, characterized in that, The second connector has an arc-shaped notch at the position corresponding to the fixing pin.

5. The moving contact assembly according to claim 1, characterized in that, The contact piece and the second connector are connected by a rotatable riveting method.

6. The moving contact assembly according to claim 1, characterized in that, The arc-initiating part is provided with an arc-shaped structure distributed along its extension direction, and the arc-shaped structure is used to lengthen the arc path.

7. The moving contact assembly according to claim 1, characterized in that, The first connector is configured as a U-shaped connector.

8. A circuit breaker, characterized in that, Includes the moving contact assembly as described in any one of claims 1-7.

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