Telescopic shaft

A telescopic shaft, female shaft technology, applied in the directions of shafts, bearings, couplings, etc., can solve the problems of stick-slip, inability to perform smooth sliding motion, etc., and achieve the effect of smooth sliding and minimizing deterioration.
CN1821593AInactive Publication Date: 2006-08-23NSK LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NSK LTD
Publication Date
2006-08-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

A surface hardening treatment is applied to an inner peripheral surface of a female shaft 2, thereby forming a hard layer Ha thereon. Surface harness of the hard layer is 400 Hv or more. The thickness of the hard layer Ha is 10 m to 100 m, and for example gas nitrocarburizing treatment is performed as the surface hardening treatment. A surface hardening treatment is also applied to an outer surface of each cylindrical member 8 by a heat treatment, thereby forming a hard layer Hb thereon. With this construction, the inner peripheral surface of the female shaft is prevented from deformation and wear under a high contact pressure, so that the smooth sliding movement can be obtained.
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Description

technical field

[0001] The present invention relates to a telescopic shaft comprising a male shaft and a female shaft which are slidably fitted in such a way as to prevent relative rotation of the two, and more particularly to a telescopic shaft incorporated in a steering shaft of a vehicle Telescopic shaft for vehicles. Background technique

[0002] The telescoping shaft of the steering mechanism part of the automobile should have the ability to absorb the axial displacement and develop during the running of the automobile so that the displacement and vibration are not transmitted to the steering wheel. In addition, the telescoping shaft should have the function of moving the steering wheel in the axial direction to adjust its position, whereby the driver can choose the most suitable position for driving the car.

[0003] In each case, the telescoping shaft should reduce rattling noise, rattling feeling on the steering wheel and sliding resistance arising from axial slippa...

Claims

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