Sealing, locking and grounding structure at wire inlet of non-explosion-proof motor junction box

Abstract

The invention relates to a sealing, locking and grounding structure at a wire inlet of a non-explosion-proof motor junction box. The sealing, locking and grounding structure mainly comprises a cable,an elastic sealing ring, a clamping groove, a junction box seat, a junction hopper and the like. Reserved holes are formed in the elastic sealing rings, the elastic sealing rings are installed in theclamping grooves, the clamping grooves are embedded in reserved spigots of the junction box base, the junction hopper is screwed on the junction box base, and a cable is connected with the wiring terminals in the junction box base through the junction hopper and the elastic sealing rings. According to the product, the original junction box mold is not changed, and on the premise that the sealing,locking and armored grounding functions of an original cable waterproof joint are ensured, the elastic sealing ring installed inside the junction box and the clamping device installed outside the junction box are combined to achieve the structure of the sealing, locking and grounding functions. The sealing, locking and grounding structure is low in production cost and high in universality, can meet the requirement for cable inlet of rubber jackets, steel cloth, armored rubber jackets and armored steel cloth cables at the same time through one structure, improves the working efficiency, and ishigh in operability.

Description

technical field [0001] The invention relates to a sealing and locking grounding structure at the wire inlet of a non-explosion-proof motor junction box. Background technique [0002] The structure of the entrance of the traditional non-explosion-proof junction box is the structure of the junction box seat with internal thread and external cable waterproof joint. The tightening function and the armored grounding function of the armored cable increase the production cost of the user. At present, most of the existing cable waterproof joints on the market use the principle of tightening the lock nut to compress the sealing ring to achieve the sealing and locking of the cable. Requirements, it has the problem that the applicable cable diameter range is small, and the connection between some cable waterproof joints and the junction box seat is only threaded, and there are also problems such as poor sealing performance. Contents of the invention [0003] The purpose of the prese...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above disadvantages and provide a sealing and locking grounding structure at the wire inlet of a non-explosion-proof motor junction box. The structure of the external cable waterproof joint needs to be realized with the help of different external cable waterproof joints, which cannot independently satisfy the sealing and locking function of the incoming cable and the armored grounding function of the armored cable. Most of the existing cable waterproof joints use The principle of tightening the lock nut and compressing the sealing ring is to achieve the sealing and locking requirements of the cable. The applicable cable diameter range is small and the sealing performance is poor.

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