Static contact of molded case circuit breaker

Abstract

The utility model relates to a fixed contact of a molded case circuit breaker. The technical problem to be solved by the utility model is to provide the fixed contact of the molded case circuit breaker. According to the technical scheme, the static contact comprises a static contact plate and a static contact, the static contact plate comprises a horizontally-arranged static contact plate external connection part, and the static contact plate external connection part is sequentially bent to form a static contact plate transition part, a static contact plate bearing part parallel to the static contact plate external connection part, a static contact plate arc part and a static contact plate butt joint part. A static contact plate receding groove is formed in the upper surface of the static contact plate butt joint part, a static contact plate positioning groove is formed in the static contact plate receding groove, and a static contact plate riveting flange is arranged at the position, outside the static contact plate positioning groove, of the static contact plate receding groove. Compared with the prior art, the fixed contact of the molded case circuit breaker has the advantages that the fixed contact plate and the fixed contact are formed by riveting, so that the welding step of the fixed contact is omitted, the circulation of products is reduced, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

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

[0002] Molded case circuit breakers (MCCBs) automatically disconnect power when the current exceeds the trip setting. The electromagnetic system of the circuit breaker features moving and stationary contacts for connecting or disconnecting the circuit. The stationary contact is a crucial component of the circuit breaker and significantly impacts its breaking capacity and stability. The stationary contact consists of a static contact point and a static contact plate. Typically, companies use silver for the static contact point and copper for the static contact plate. The static contact point is secured to the static contact plate using welding. While welding improves safety, the addition of silver points increases production costs by adding additional steps. Furthermore, welding the static contact point can be prone to inaccurate positioning, often leading to misaligned, incorrectly welded, or missing welds, resulting in high product defect rates. This is a topic for improvement and optimization. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the present invention is to provide a static contact of a molded case circuit breaker.

[0004] The technical solution adopted by the static contact of the molded case circuit breaker of the utility model includes: a static contact plate and a static contact, characterized in that the static contact plate includes a horizontally arranged static contact plate external connecting portion, the static contact plate external connecting portion is bent in sequence to form a static contact plate transition portion, a static contact plate receiving portion arranged parallel to the static contact plate external connecting portion, a static contact plate arc portion, and a static contact plate docking portion arranged above the static contact plate receiving portion and connected to the static contact plate receiving portion, the upper surface of the static contact plate docking portion is provided with a static touch plate yielding groove, the static touch plate yielding groove is provided with a static touch plate positioning groove for positioning the static contact, the static touch plate yielding groove is provided with a static touch plate riveted rib outside the static touch plate positioning groove, and static touch plate openings are provided on the four corners of the static touch plate positioning groove, the static contact is a square structure, and a static contact limiting groove is provided on its side wall, the static contact is riveted in the static touch plate positioning groove, and the static touch plate riveted rib forms a rib embedding portion embedded in the static contact limiting groove.

[0005] The static touch plate opening is a wedge-shaped structure, and an opening at one end of the static touch plate opening close to the static touch plate positioning groove is larger than an opening at another end of the static touch plate opening away from the static touch plate positioning groove.

[0006] The height of the riveted rib of the stationary contact plate is lower than the depth of the stationary contact plate positioning groove.

[0007] A diversion port is provided in the middle of the receiving portion of the static contact plate below the static contact point.

[0008] The external connection portion of the static touch plate is provided with anti-slip lines.

[0009] The advantages of the static contact of the molded case circuit breaker of the present invention are: the static contact plate and the static contact are riveted together, which eliminates the static contact welding step, reduces product circulation, improves production efficiency, and reduces production costs. On the other hand, the static contact plate positioning groove, the static contact plate riveted rib and the static contact plate opening design enable accurate stamping positioning, and the static contact will not be placed crookedly or missed, thereby reducing the defective rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0011] Figure 1 This is a structural diagram of the static contact of the molded case circuit breaker of the utility model;

[0012] Figure 2 This is a structural diagram of the static touch panel of the utility model;

[0013] Figure 3 yes Figure 2 Magnified image of;

[0014] Figure 4 This is a schematic structural diagram of the static contact of the utility model;

[0015] Figure 5 This is a half-section view of the static contact of the molded case circuit breaker of the present invention;

[0016] Figure 6 yes Figure 5 Magnified image of . DETAILED DESCRIPTION

[0017] like Figure 1-6As shown, the static contact of the molded case circuit breaker involved in the present invention includes a static contact plate 1 and a static contact point 2, the static contact plate 1 includes a horizontally arranged static contact plate external connection portion 4, the static contact plate external connection portion 4 is bent in sequence to form a static contact plate transition portion 5, a static touch plate receiving portion 6 arranged parallel to the static touch plate external connection portion 4, a static touch plate arc portion 7, and a static touch plate docking portion 8 provided above the static touch plate receiving portion 6 and connected to the static touch plate receiving portion 6. A static touch plate yielding groove 10 is provided on the upper surface of the static touch plate docking portion 8, a static touch plate positioning groove 11 for positioning the static contact point 2 is provided on the static touch plate yielding groove 10, and a static touch plate riveting rib 12 is provided on the static touch plate positioning groove 11 outside the static touch plate positioning groove 11. Static touch plate openings 13 are provided on the four corners of the static touch plate positioning groove 11. The static contact 2 is a square structure, and its side wall is provided with a static contact limiting groove 15. The static contact 2 is riveted in the static touch plate positioning groove 11. The static touch plate riveted rib 12 forms a rib embedded portion 16 embedded in the static contact limiting groove 15. The static touch plate 1 and the static contact 2 are riveted together, which eliminates the welding step of the static contact 2, reduces the flow of products, improves production efficiency, and reduces production costs. On the other hand, the static touch plate positioning groove 11 enables accurate positioning during stamping and riveting, and the rib embedded portion 16 can strengthen the riveting tightness with the static contact when riveting, effectively preventing falling off due to frequent contact after riveting, and reducing the defective rate.

[0018] The static touch plate opening 13 is a wedge-shaped structure. The opening of the static touch plate opening 13 at one end close to the static touch plate positioning groove 11 is larger than the opening at the other end away from the static touch plate positioning groove 11. The static touch plate opening design is more convenient for forming during riveting. On the other hand, it can make it easier for the static contact point 2 to be in close contact with the static touch plate 1, thereby improving the riveting effect and making the product more firm and stable.

[0019] The height of the riveted rib 12 of the static touch plate is lower than the depth of the static touch plate positioning groove 11 , which effectively saves costs and enables the static touch plate to be integrally formed.

[0020] A diversion port 17 is provided in the middle of the static contact plate receiving portion 6 below the static contact point 2 .

[0021] The external connection portion 4 of the static contact plate is provided with anti-slip grooves 18 to enhance the stability and reliability during wiring.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A molded case circuit breaker static contact, comprising a static contact plate (1) and a static contact point (2), characterized in that: The static touch plate (1) comprises a horizontally arranged static touch plate external connection portion (4), the static touch plate external connection portion (4) is bent in sequence to form a static touch plate transition portion (5), a static touch plate receiving portion (6) arranged parallel to the static touch plate external connection portion (4), a static touch plate arc portion (7), and a static touch plate docking portion (8) arranged above the static touch plate receiving portion (6) and connected to the static touch plate receiving portion (6), the upper surface of the static touch plate docking portion (8) is provided with a static touch plate yielding groove (10), and the static touch plate yielding groove (10) is provided with a static contact point (2) The static touch plate positioning groove (11) is positioned, the static touch plate giving way groove (10) is provided with a static touch plate riveted rib (12) outside the static touch plate positioning groove (11), the static touch plate positioning groove (11) is provided with a static touch plate opening (13) at four corners, the static contact (2) is a square structure, and a static contact limiting groove (15) is provided on its side wall, the static contact (2) is riveted in the static touch plate positioning groove (11), and the static touch plate riveted rib (12) forms a rib embedded portion (16) embedded in the static contact limiting groove (15).

2. The molded case circuit breaker static contact according to claim 1, characterized in that: The static touch plate opening (13) is a wedge-shaped structure, and the opening of one end of the static touch plate opening (13) close to the static touch plate positioning groove (11) is larger than the opening of the other end away from the static touch plate positioning groove (11).

3. The static contact of the molded case circuit breaker according to claim 1, characterized in that: The height of the stationary touch plate riveting rib (12) is lower than the depth of the stationary touch plate positioning groove (11).

4. The static contact of the molded case circuit breaker according to claim 1, characterized in that: A diversion port (17) is provided in the middle of the static contact plate receiving portion (6) below the static contact point (2).

5. The molded case circuit breaker static contact according to claim 1, characterized in that: The external connection portion (4) of the static touch plate is provided with anti-slip lines (18).

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