Assembly for motor vehicles

The sealing system, composed of felt and PTFE or fluororubber, solves the sealing and wear problems of automotive components under high temperature and temperature changes, achieving reliable sealing and low friction over a wide temperature range, protecting bearings and extending service life.

CN113137472BActive Publication Date: 2026-07-21ROBERT BOSCH GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ROBERT BOSCH GMBH
Filing Date
2021-01-18
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing automotive components face challenges such as exposure to liquid and gaseous media, temperature variations, sealing and corrosion over a wide temperature range. They struggle to reliably seal at high temperatures, generate minimal friction during shaft movement, and protect bearings from particles and contamination.

Method used

The sealing system consists of a first sealing element made of felt and a second sealing element made of PTFE or fluororubber. The felt is used to filter particles and maintain a seal under different humidity and temperature conditions, while the PTFE or fluororubber is used for high-temperature stability and low friction. The design of the sealing element carrier is combined with a self-adjusting sealing function to ensure sealing performance and low friction.

Benefits of technology

It achieves reliable sealing in a temperature range of -40℃ to 170℃, reduces fluid media leakage, protects bearings, reduces friction and extends service life, while also providing particle filtration.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN113137472B_ABST
    Figure CN113137472B_ABST
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Abstract

The invention relates to an assembly for a motor vehicle, comprising a housing, a servomotor which is rotatable about an axis, a servodrive which is provided to cause a rotation of the servomotor, a rotatable shaft which extends along the axis and which is arranged between and coupled to the servomotor and the servodrive, wherein the shaft is guided through a first passage opening in the housing, wherein a sealing system is provided between the shaft and a first inner wall of the first passage opening in a radial direction perpendicular to the axis, the sealing system having a sealing element carrier with a first side and a second side facing away from the first side, the sealing element carrier being fastened in the first passage opening, the sealing element carrier having a second passage opening with a second inner wall, a first sealing element being fixedly fastened on the sealing element carrier on the first side of the sealing element carrier, the first sealing element having a third passage opening through which the shaft is guided, the first sealing element being ring-shapedly seated against the shaft by a third inner wall of the third passage opening, the first sealing element being made of felt.
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