Terminal waterproofing structure of wire harness

Abstract

The present invention prevents deterioration of the sealing performance of a grommet when exposed to a high-temperature state for a prolonged period of time. In this terminal waterproofing structure of a wire harness, the tip side of a braided tubular shielding member for sheathing the wire harness is placed over a tubular section of a shielding shell and swage-locked by means of a first swaging ring, a tubular grommet made of an elastic member is fitted over the tubular section of the shielding shell that is exposed from the tip of the braided tubular shielding member so that the grommet covers the swage-locked section of the braided tubular shielding member, the tip of the grommet is butted against a flange section of the shielding shell, the periphery of the grommet on the tip side is swage-locked by means of a second swaging ring, an annular sealing rib protruding from the inner circumferential surface of the grommet is provided at a position sandwiched by the second swaging ring and the first swaging ring, and a recessed section for fitting the annular sealing rib is provided on the outer circumferential surface of the tube section of the shielding shell.

Description

technical field [0001] The present invention relates to an end waterproof structure of a wire harness. Specifically, it is a structure in which a wire sheath installed at an end of a wire harness wired in a vehicle can be exposed to high temperature for a long time without degrading the wire sheath. Waterproof the end of the harness without compromising the sealing performance of the harness. Background technique [0002] In the past, the wiring harness composed of high-voltage electric wires that is routed between the battery and the inverter, or between the inverter and the motor, etc. of hybrid vehicles and electric vehicles is less likely to be routed under the floor on the lower surface side of the floor. many. The wire harness that is routed under the floor needs to be waterproofed, protected from flying stones, and shielded. Therefore, the wire group constituting the wire harness is inserted into an exterior member made of, for example, a metal pipe, and the metal pi...

AI Technical Summary

Problems solved by technology

[0006] On the other hand, the cross-sectional shape of the cylindrical portion 116 of the shield case 115 is usually formed in an ellipse or an oblong shape in many cases, so there is a problem that even if the second riveting ring 114 is used to fix the protective wire covering the cylindrical portion 116 Even if the large-diameter cylindrical portion 111a of the sleeve 111 is fixed by riveting, it is difficult to apply pressure evenly and improve the sealing performance.

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