Pressure-resistant heat-dissipation circuit breaker contact arm

Abstract

The utility model provides a voltage-withstanding heat-dissipation circuit breaker contact arm, and belongs to the technical field of electrical components. The pressure-resistant heat-dissipation circuit breaker contact arm comprises a contact arm head, a contact arm body and a mounting substrate which are integrally formed and designed; the whole contact arm head is a big-end-down flat-top cone, and a connecting seat is formed at the top, connected with the contact arm body, of the contact arm head. A conical head is formed at one end, fixedly connected with the connecting seat, of the contact arm body, the contact arm body is integrally designed to be of a hollow tubular structure, and a plurality of heat dissipation holes are circumferentially formed in the contact arm body; the top end of the contact arm body integrally forms an installation substrate upwards. The LED lamp has the advantages of being diversified in function, small in occupied installation space and good in heat dissipation performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical components, and relates to a contact arm, in particular to a contact arm of a voltage-resistant and heat-dissipating circuit breaker. Background Art

[0002] A circuit breaker is a commonly used switching device in the power system for protecting equipment and circuits. As a key component, the contact arm of the circuit breaker plays a role in disconnecting and closing the circuit. The material and structure of the contact arm of the circuit breaker have a great influence on the performance and service life of the circuit breaker.

[0003] The patent with the application number CN201020522786.0 discloses a conductive contact arm for a high-voltage cabinet fuse, which includes a substrate and a long arm. The long arm is designed in a long strip plate structure, and the substrate and the long arm are designed to be perpendicular to each other. When this contact arm is installed inside the circuit breaker, the installation space occupied is relatively large, there is redundancy in the structure, and the heat dissipation performance is poor. Content of the Utility Model

[0004] The purpose of the utility model is to provide a contact arm of a voltage-resistant and heat-dissipating circuit breaker for the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions: A contact arm of a voltage-resistant and heat-dissipating circuit breaker includes a contact arm head, a contact arm body, and a mounting substrate, and the three are integrally formed; the contact arm head is integrally in the shape of a flat-top cone with a smaller upper part and a larger lower part, and the inside is a hollow structure. The mounting inclined surface on the side of the flat-top cone cooperates with the grid on the contact piece of the contact head for limiting. A connection seat is formed at the top where the contact arm head is connected to the contact arm body; a tapered head is formed at one end of the contact arm body where it is fixedly connected to the connection seat. The contact arm body is integrally designed as a hollow tubular structure, and a number of heat dissipation holes are circumferentially opened on it; the top end of the contact arm body is integrally formed upward to form a mounting substrate.

[0006] In the above-mentioned contact arm of a voltage-resistant and heat-dissipating circuit breaker, a contact head hole is opened at the center of the bottom surface of the contact arm head.

[0007] In the above-mentioned contact arm of a voltage-resistant and heat-dissipating circuit breaker, a circular groove is circumferentially opened on the contact arm body above the tapered head.

[0008] In the above-mentioned contact arm of a voltage-resistant and heat-dissipating circuit breaker, the top of the mounting substrate is in an arc shape, and a first mounting hole is opened at the center of the arc shape on the mounting substrate, and a number of second mounting holes are opened below the first mounting hole.

[0009] In the above-mentioned contact arm of a voltage-resistant and heat-dissipating circuit breaker, the material used for the integral design of the contact arm head, the contact arm body, and the mounting substrate is copper.

[0010] Compared with the prior art, a pressure-resistant and heat-dissipating circuit breaker contact arm provided by the utility model has an integrated coaxial design of a contact arm head, a contact arm body, and a mounting substrate, making the contact arm have diverse functions and occupy a smaller mounting space. At the same time, the overall heat dissipation effect of the contact arm is enhanced through the hollow structure and the arrangement of heat dissipation holes. Brief Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the pressure-resistant and heat-dissipating circuit breaker contact arm;

[0012] Figure 2 is a schematic structural diagram of the contact arm head in the pressure-resistant and heat-dissipating circuit breaker contact arm.

[0013] In the above figures, 100, contact arm head; 110, mounting inclined surface; 111, contact hole; 120, connecting seat; 200, contact arm body; 210, conical head; 220, annular groove; 230, heat dissipation hole; 300, mounting substrate; 310, first mounting hole; 320, second mounting hole. Detailed Description of the Preferred Embodiments

[0014] The following are specific embodiments of the present utility model and in conjunction with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0015] As Figures 1 to 2 shown, the pressure-resistant and heat-dissipating circuit breaker contact arm successively includes a contact arm head 100, a contact arm body 200, and a mounting substrate 300 from bottom to top. The three are integrally formed and coaxial designed, and the overall mounting space occupied is small, avoiding redundancy inside the circuit breaker. The overall material of the contact arm is made of red copper. Red copper has good electrical conductivity and thermal conductivity, excellent plasticity, and is easy for hot pressing and cold pressure processing, and is suitable for manufacturing products such as electrical components that require good electrical conductivity.

[0016] As Figure 2 shown, the contact arm head 100 is overall in the shape of a flat-top cone with a smaller top and a larger bottom, and is a hollow structure inside. A contact hole 111 is opened at the center of the bottom surface of the flat-top cone, and the side surface is a mounting inclined surface 110. When a contact is installed on the contact arm head 100, the bottom end of the contact arm head 100 extends into the contact and cooperates with the grid on the contact piece for limiting. A connecting seat 120 is formed at the top of the contact arm head 100, and the contact arm head 100 is fixedly connected to the bottom end of the contact arm body 200 through the connecting seat 120.

[0017] As Figure 1As shown, one end of the contact arm body 200 fixedly connected to the connection base 120 forms a tapered head 210, and the tapered head 210 is a flat-top cone with a larger upper part and a smaller lower part, which plays a role of transitional connection. A circular groove 220 is circumferentially formed on the upper side of the tapered head 210 on the contact arm body 200. When the contact arm is installed, a contact head sleeve is sleeved on the contact arm through the circular groove 220 to enclose and protect the lower tapered head 210, the contact arm head 100 and the contact head. The contact arm body 200 is integrally designed as a hollow tubular structure, and a plurality of heat dissipation holes 230 are circumferentially formed on its side wall. The hollow structure and the heat dissipation holes 230 further enhance the heat dissipation effect of the contact arm.

[0018] The top end of the contact arm body 200 integrally forms an installation substrate 300 upwards. The top of the installation substrate 300 is arc-shaped, and a first installation hole 310 is formed at the center of the arc shape on the installation substrate 300, and a plurality of second installation holes 320 are formed below the first installation hole 310. The setting of the installation substrate 300 increases the functionality of the contact arm. The contact arm can be fixedly installed on the circuit breaker through the first installation hole 310 and the second installation hole 320 on the installation substrate 300 to form an energized circuit.

[0019] The specific embodiments described in this article are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the present invention belongs can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0020] Although various terms are used more in this article, the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A pressure-resistant heat dissipation circuit breaker contact arm, comprising a contact arm head (100), a contact arm body (200) and a mounting substrate (300), characterized in that: The three are of an integrated molding design. The contact arm head (100) is generally a flat-topped cone that is small at the top and large at the bottom, and has a hollow structure inside. The mounting bevel (110) on the side of the flat-topped cone cooperates with the grid sheet on the contact sheet to limit the position. A connecting seat (120) is formed at the top of the contact arm head (100) connected to the contact arm body (200); a conical head (210) is formed at one end of the contact arm body (200) that is fixedly connected to the connecting seat (120); the contact arm body (200) is generally designed as a hollow tubular structure, and a plurality of heat dissipation holes (230) are opened circumferentially thereon; and a mounting base plate (300) is formed integrally at the top of the contact arm body (200) upward.

2. A contact arm of a pressure-resistant heat-dissipating circuit breaker according to claim 1, characterized in that: A contact hole (111) is provided at the center of the bottom surface of the contact arm head (100).

3. A contact arm of a pressure-resistant heat-dissipating circuit breaker according to claim 1, characterized in that: The upper side of the conical head (210) is provided with a circular groove (220) circumferentially on the contact arm body (200).

4. A contact arm of a pressure-resistant heat-dissipating circuit breaker according to claim 1, characterized in that: The top of the mounting substrate (300) is in an arc shape, a first mounting hole (310) is provided on the mounting substrate (300) at the center of the arc, and a plurality of second mounting holes (320) are provided below the first mounting hole (310).

5. A contact arm of a pressure-resistant heat-dissipating circuit breaker according to claim 1, characterized in that: The material used for the integrated design of the contact arm head (100), the contact arm body (200) and the mounting base plate (300) is red copper.

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