Static contact of circuit breaker

Abstract

The utility model relates to a static contact of a circuit breaker. The technical problem to be solved by the utility model is to provide the static contact of the circuit breaker. According to the technical scheme, the static contact comprises a static contact body, a static contact point and a contact supporting frame, the static contact body comprises a static contact main board part, the right end of the static contact main board part is bent outwards and extends to form a static contact transition part and a static contact wiring part, the static contact wiring part is provided with a static contact wiring hole, and the static contact wiring hole is connected with the static contact point. The left end of the static contact mainboard part is bent outwards and extends to form a static contact arc part and a static contact butt joint part, the front end of the static contact butt joint part is provided with a contact welding hole, the contact support frame comprises a support leg and a support frame bearing part, and the support frame bearing part is provided with a support frame bearing groove. The utility model has the advantages that the contact support frame can support the butt joint part of the static contact, so that the static contact main body is more stable and reliable when being in butt joint with the moving contact, and the static contact main body is matched with the integrally formed arc striking block to carry out rapid arc striking, so that the whole service life is longer.

Description

Technical Field

[0001] The utility model relates to a static contact of a circuit breaker. Background Art

[0002] The molded case circuit breaker can automatically cut off the power supply after the current exceeds the trip setting. The electromagnetic system of the circuit breaker has moving and static contacts for circuit connection or disconnection. The static contacts are mostly fixed on the molded case circuit breaker. As the moving contact frequently opens and closes, the existing static contacts are easily subject to the impact of the moving contact for a long time, resulting in serious wear at the contact point, a decrease in accuracy, and even positional displacement of the static contacts, which eventually leads to a larger temperature rise, affecting the circuit breaker's breaking capacity and stability. In addition, the existing static contacts have low installation efficiency. In view of the above problems, the existing circuit breaker static contacts are improved and optimized. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a circuit breaker static contact.

[0004] The technical solution adopted by the static contact of the circuit breaker of the utility model: The invention is characterized in that it comprises a static contact body, a static contact and a contact support frame, wherein the static contact body comprises a static contact main board part, the right end of the static contact main board part is bent outwardly and extended to form a static contact transition part and a horizontally arranged static contact wiring part, and a static contact wiring hole is provided on the static contact wiring part, the left end of the static contact main board part is bent outwardly and extended to form a static contact arc part and a horizontally arranged static contact docking part, and a contact welding hole corresponding to the static contact is provided at the front end of the static contact docking part, and the contact support frame comprises a supporting foot and a supporting frame receiving part connecting the two supporting feet, the supporting frame receiving part is provided with a supporting frame receiving groove for receiving the lower part of the front end of the static contact docking part, the supporting frame receiving part is provided with a supporting frame limiting blocks at both ends of the supporting frame receiving groove, and a static contact reinforcement recess corresponding to the supporting frame limiting blocks is provided at the front end of the static contact docking part, and the front and rear ends of the static contact main board part are provided with a first limiting opening of the main board part for limiting the supporting foot.

[0005] A shunt port is provided in the middle of the main plate portion of the stationary contact, and the main plate portion of the stationary contact is bent at the shunt port to form an arc-starting block for starting an arc at the stationary contact point.

[0006] The front and rear ends of the stationary contact main plate portion are provided with stationary contact positioning recesses, and the front end of the stationary contact wiring portion is provided with a stationary contact second positioning recess. Both the stationary contact positioning recess and the stationary contact second positioning recess are square structures.

[0007] The stationary contact wiring portion is provided with an isolation plate positioning groove for positioning the circuit breaker isolation plate near the stationary contact transition portion.

[0008] The stationary contact body and the arc striking block are integrally formed by stamping.

[0009] The stationary contact abutting portion is higher than the stationary contact wiring portion.

[0010] The advantages of the static contact of the circuit breaker of the utility model are: the contact support frame can support the docking part of the static contact, so that the static contact body is more stable and reliable when docking with the moving contact, and then cooperate with the integrally formed arc-starting block to quickly start the arc. The static contact body is not easily deformed due to frequent impacts, resulting in excessive temperature rise, and the overall service life is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0012] Figure 1 It is a structural schematic diagram of the static contact of the circuit breaker of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the main body of the static contact of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the contact support frame of the utility model. DETAILED DESCRIPTION

[0015] like Figure 1-3 As shown, the utility model involves a circuit breaker static contact, including a static contact body 1, a static contact point 2 and a contact support frame 3, wherein the static contact body 1 includes a static contact main board portion 5, the right end of the static contact main board portion 5 is bent outwardly to extend to form a static contact transition portion 6, a horizontally arranged static contact wiring portion 7, and a static contact wiring hole 20 is provided on the static contact wiring portion 7, the left end of the static contact main board portion 5 is bent outwardly to extend to form a static contact arc portion 8, a horizontally arranged static contact docking portion 9, and the front end of the static contact docking portion 9 is provided with a contact welding hole 10 corresponding to the static contact point 2, and the contact support frame 3 includes a support leg 12 and a support frame receiving portion connecting the two support legs 12 13, the support frame receiving portion 13 is provided with a support frame receiving groove 14 for receiving the lower part of the front end of the static contact docking portion 9, the support frame receiving portion 13 is provided with support frame limiting blocks 15 at both ends of the support frame receiving groove 14, the front end of the static contact docking portion 9 is provided with a static contact reinforcement recess 16 corresponding to the support frame limiting blocks 15, the front and rear ends of the static contact main board portion 5 are provided with a main board portion first limiting opening 17 for limiting the support foot 12, the contact support frame 3 can support the static contact docking portion 9, so that the static contact body 1 is more stable and reliable when docking with the moving contact, the static contact docking portion 9 is not easily deformed due to frequent impacts, resulting in excessive temperature rise, and the overall service life is longer.

[0016] The middle of the stationary contact main plate 5 is provided with a shunt port 18, and the stationary contact main plate 5 is bent at the shunt port 18 to form an arc-starting block 19 for striking an arc at the stationary contact 2. The arc-starting block can strike an arc quickly, effectively reduce temperature rise, and further improve product service life.

[0017] The front and rear ends of the stationary contact main board part 5 are provided with stationary contact positioning recesses 22, and the front end of the stationary contact wiring part 7 is provided with a stationary contact second positioning recess 23. Both the stationary contact positioning recess 22 and the stationary contact second positioning recess 23 are square structures, triangularly positioned, and firmly installed without shaking.

[0018] The stationary contact wiring portion 7 is provided with an isolating plate positioning groove 25 for positioning the circuit breaker isolating plate near the stationary contact transition portion 6 .

[0019] The static contact body 1 and the arc striking block 19 are integrally formed by stamping, and are easy to process.

[0020] The stationary contact abutting portion 9 is higher than the stationary contact wiring portion 7 .

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A circuit breaker static contact, characterized in that: The invention comprises a stationary contact body (1), a stationary contact point (2) and a contact support frame (3), characterized in that: the stationary contact body (1) comprises a stationary contact main plate portion (5), the right end of the stationary contact main plate portion (5) is bent outwardly to extend to form a stationary contact transition portion (6), a horizontally arranged stationary contact wiring portion (7), the stationary contact wiring portion (7) is provided with a stationary contact wiring hole (20), the left end of the stationary contact main plate portion (5) is bent outwardly to extend to form a stationary contact arc portion (8), a horizontally arranged stationary contact docking portion (9), the front end of the stationary contact docking portion (9) is provided with a contact welding hole (10) corresponding to the stationary contact point (2), the contact support frame (3) is provided with a stationary contact welding hole (10) corresponding to the stationary contact point (2), and the stationary contact main plate portion (5) is provided with a stationary contact welding hole (10) corresponding to the stationary contact point (2). The support frame (3) comprises a support foot (12) and a support frame receiving portion (13) connecting the two support feet (12); the support frame receiving portion (13) is provided with a support frame receiving groove (14) for receiving the lower portion of the front end of the static contact docking portion (9); the support frame receiving portion (13) is provided with a support frame limiting block (15) at both ends of the support frame limiting groove (14); the front end of the static contact docking portion (9) is provided with a static contact reinforcement recess (16) corresponding to the support frame limiting block (15); and the front and rear ends of the static contact main board portion (5) are provided with a main board portion first limiting opening (17) for limiting the support foot (12).

2. The circuit breaker static contact according to claim 1, characterized in that: A shunt port (18) is provided in the middle of the stationary contact main plate portion (5), and the stationary contact main plate portion (5) is bent at the shunt port (18) to form an arc-starting block (19) for starting an arc at the stationary contact point (2).

3. The circuit breaker static contact according to claim 1, characterized in that: The front and rear ends of the stationary contact main plate portion (5) are provided with stationary contact positioning recesses (22), and the front end of the stationary contact wiring portion (7) is provided with a stationary contact second positioning recess (23), and both the stationary contact positioning recess (22) and the stationary contact second positioning recess (23) are of square structure.

4. The circuit breaker static contact according to claim 1, characterized in that: The stationary contact wiring portion (7) is provided with an isolation plate positioning groove (25) for positioning the circuit breaker isolation plate near the stationary contact transition portion (6).

5. The circuit breaker static contact according to claim 2, characterized in that: The stationary contact body (1) and the arc striking block (19) are integrally formed by stamping.

6. The circuit breaker static contact according to claim 1, characterized in that: The stationary contact butting portion (9) is higher than the stationary contact wiring portion (7).

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