Double-layer corrugated pipe for automobile wire harness protection

Abstract

The invention discloses a double-layer corrugated pipe for automobile wire harness protection, and the corrugated pipe comprises an outer corrugated pipe body and an inner corrugated pipe body, wherein the inner corrugated pipe body is arranged on the inner side of the outer corrugated pipe body; the outer corrugated pipe body is made of a PPV0 material, and the hardness of the outer corrugated pipe is 70D-80D; the inner corrugated pipe body is made of a TPVV0 elastomer material, and the hardness of the inner corrugated pipe is 60A-70A. The corrugated pipe is reasonable in structural design and convenient to use; the outer corrugated pipe body is high in hardness and can be prevented from being abraded and extruded by external factors; the inner corrugated pipe body is low in hardness, soft and capable of preventing the inner wall of the corrugated pipe from abrading the wire harness wire skin; the outer corrugated pipe body is made of a PPV0 material conforming to the UL-94 V0 flame retardant standard, the inner corrugated pipe is made of a TPVV0 elastomer material conforming to the UL94-V0 flame retardant standard, and when the surface of the electric wire is on fire, the function of preventing or slowing down continuous combustion of fire is achieved. Due to the special effect of the material, the wire harness can still be effectively protected in the alternating environmentof 40-150 DEG C.

Description

Technical field [0001] The invention relates to the technical field of automobile parts, in particular to a double-layer corrugated pipe for automobile wiring harness protection. Background technique [0002] At present, the protection method of domestic truck wiring harness is generally single-layer corrugated pipe, but because of the structure and hardness of the pipe itself, the inner wall of the corrugated pipe will have certain abrasion on the wire surface of the automobile wiring harness, and even some wear the wire skin. Electric wires are leaking or short-circuited, causing the wires to catch fire, and in the domestic truck market, some wire harness protection products can not meet the high and low temperature changes and can still effectively protect the wire harness. At the same time, the domestic wire harness protection single-layer corrugated pipe inner and outer layers are of the same type The materials are relatively hard, causing the inner wall of the corrugated tu...

AI Technical Summary

Problems solved by technology

[0002] At present, the protection method of the domestic truck wiring harness is generally a single-layer corrugated pipe, but the inner wall of the single-layer corrugated pipe will wear the surface of the wire of the automobile wiring harness due to the structure and hardness of the pipe itself, and some even wear the skin of the wire. Leakage or short circuit of the wires will cause the wires to catch fire and burn, and some wire harness protection products in the domestic truck market cannot meet the requirements of high and low temperature changes and can still effectively protect the wire harness. The materials are relatively hard, causing the inner wall of the bellows itself to wear to a certain extent on the skin of the wire harness, and sometimes even wear through the skin of the wire

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