Method of making a torsional damper

Details Method of making a torsional damper Method of making a torsional damper

1998-05-04

1999-09-28

Echols, P. W.

Metal working

Method of mechanical manufacture

Assembling or joining

74492, 464 89, 464181, B21D 3500

Patent

active

059568364

ABSTRACT:
A method of making a torsional damper for a motor vehicle intermediate steering shaft including the steps of forming a tubular end on a shaft of the intermediate steering shaft, forming a damper chamber in a yoke of a torsionally rigid universal coupling around and oversize relative to the tubular end of the shaft so that an uncalibrated annular clearance is defined therebetween, disposing a tubular torsion block in the uncalibrated annular clearance with an outside surface bonded to an inside surface of the damper chamber and an inside surface bonded to an outside surface of the tubular end of the shaft, and converting the uncalibrated annular chamber to a calibrated annular chamber by expanding the tubular end of the shaft inside of the damper chamber to radially compress tubular torsion block and increase the torsional stiffness thereof. In a preferred embodiment of the method according to this invention, the tubular torsion block is formed-in-place by injecting a flowable melt of an elastomeric material into the uncalibrated annular clearance which cures solid and is self-bonding to the inside surface of the damper chamber and to the outside surface of the tubular end of the shaft.

REFERENCES:
patent: 4385897 (1983-05-01), Mallet
patent: 4509775 (1985-04-01), Arndt
patent: 4787878 (1988-11-01), Nikkel
patent: 4983143 (1991-01-01), Sekine et al.
patent: 5086661 (1992-02-01), Hancock
patent: 5259818 (1993-11-01), Kachi et al.

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