A plastic case circuit breaker moving contact synchronous shaping fixture

Abstract

The invention discloses a molded case circuit breaker moving contact synchronization shaping fixture. The molded case circuit breaker moving contact synchronization shaping fixture comprises supporting columns, a sliding plate, adjusting bearings, bearing blocks, a rotary pressing block, a rotary bearing, pushing rods, a base, a sliding block and so on. The molded case circuit breaker moving contact synchronization shaping fixture is characterized in that the shaping fixture is of a double-column sliding plate structure. A vertical air cylinder and a horizontal air cylinder are adopted as driving power. The molded case circuit breaker moving contact synchronization shaping fixture has the advantages of reasonable structure, operation convenient and high shaping speed. With the molded case circuit breaker moving contact synchronization shaping fixture adopted, a shaped moving contact has excellent synchronization performance, and excellent working performance of a molded case circuit breaker can be ensured.

Description

technical field [0001] The invention relates to a synchronous shaping jig for a moving contact of a low-voltage molded case circuit breaker, which belongs to the technical field of low-voltage electrical appliance manufacturing. Background technique [0002] Molded case circuit breaker is a kind of low-voltage electrical appliance with wide application, and it has a large quantity and a wide range. Because it adopts a clapping-type dynamic and static contact structure, it has a high connection and breaking capacity. The specific structure of the moving contact of the circuit breaker is as follows: figure 1 As shown, it includes a contact piece 01, a plastic support 02, pins 03, 04, and 05. The tension spring between the pins 03 and 05 is omitted in the figure. Under the action of the tension spring, the contact pieces 01 of each phase are opposite to each other. The positions of the plastic support 02 are basically the same, but because the moving contact pieces of each pha...

AI Technical Summary

Problems solved by technology

The specific structure of the moving contact of the circuit breaker is as follows: figure 1 As shown, it includes a contact piece 01, a plastic support 02, pins 03, 04, and 05. The tension spring between the pins 03 and 05 is omitted in the figure. Under the action of the tension spring, the contact pieces 01 of each phase are opposite to each other. The positions of the plastic support 02 are basically the same, but because the moving contact pieces of each phase are assembled structures, there are manufacturing and assembly errors of the parts, especially the deformation of the plastic parts after forming is large, so it is difficult to achieve each position through direct assembly. The synchronicity of the phase-moving contact pieces, that is, the synchronicity of the contact pieces of each phase relative to the shaft diameter of the plastic support, so it is necessary to reshape the contact pieces of each phase of the moving contact, otherwise it is difficult to meet the synchronization requirements

In order to ensure the flatness of the contact pieces of each phase and ensure their synchronization, at present, most manufacturers compensate the asynchrony of the moving contacts by adjusting the gaskets of the static contacts after the circuit breaker is assembled. Although the method is simple and common in the industry, sometimes in order to ensure the interchangeability of parts and improve the automatic assembly process of molded case circuit breakers, it is not allowed to manually adjust the static contact gasket to compensate the asynchrony of the moving contact , it is necessary to reshape the contact pieces of each phase of the moving contact to ensure the synchronization of the contact pieces of each phase of the moving contact relative to the plastic support shaft diameter, so that the moving and static contacts can be connected synchronously after being assembled in the plastic case Or break, so that there will be no phase loss

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