Bellows seal fittings with shielding

Abstract

The invention discloses a bellows sealing joint with shielding function. The sealing joint includes a shielding ring, a sealing ring, a compression ring and a locking member. The shielding ring is made of copper alloy. Transitional interference fit with the inner wall of the sensor housing, the outer rear end of the shielding ring is sleeved with the front end of the bellows, the outer front end of the bellows is sleeved with a sealing ring, the outer side of the sealing ring is sleeved with a compression ring, and the compression ring is in contact with the inner wall of the sensor housing. The locking piece is installed at the end of the sensor housing. The sealing joint can improve shielding effect, anti-interference performance and sealing performance.

Description

technical field [0001] The invention relates to a joint between a sensor and a corrugated pipe, in particular to a sealing joint with a shielding function. Background technique [0002] In the field of locomotives and urban rail, the speed sensor for the traction motor is required to be miniaturized due to the limited installation and operation space. With the increasing requirements of the existing operating environment, it is necessary to realize the connection of the cable shielding wire and the housing in the miniaturized space of the speed sensor to achieve good EMC performance; at the same time, in order to achieve cable protection, it is necessary to install Corrugated hose, and the transition between the hose and the outlet end of the sensor needs to be well fixed, locked and sealed. [0003] Existing hose joints are common standard parts, and there are three disadvantages when used on sensors: 1. In order to cooperate with hose joints, the inner and outer diameters...

AI Technical Summary

Problems solved by technology

[0003] Existing hose joints are common standard parts, and there are three disadvantages when used on sensors: 1. In order to cooperate with hose joints, the inner and outer diameters of the sensor housing are limited, making it difficult to miniaturize the sensor; 2. Protection The corrugated hose used for the cable cannot be directly fixed, locked and sealed, resulting in the failure of the hose at the outlet end of the sensor to fix the hidden danger of the cable being stressed, and the sealing performance cannot meet the requirements; 3. The shielding wire of the cable and the shell When the body is connected, the contact resistance is too large, which will affect the common ground effect between the shielded wire and the shell, resulting in weakened EMC performance

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