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SHOCK ABSORBENT PAWL MEMBER

IP.com Disclosure Number: IPCOM000025760D
Original Publication Date: 1987-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 95K

Publishing Venue

Xerox Disclosure Journal

Abstract

A pawl member used in conjunction with repeated stopping of a gear train is, with the gear train, subjected to a large amount of fatiguing stress. This type of wear may be reduced by providing the pawl member with a bearing mounted in shock absorbing or compressible material, which provides the repeated pawl member and gear train engagement with a small amount of stress reducing play.

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XEROX DISCLOSURE JOURNAL

SHOCK ABSORBENT PAWL MEMBER
Arthur D rummond

Proposed Classification
U.S. c1.741575 Int. C1. G05g 1/00

A pawl member used in conjunction with repeated stopping of a gear train is, with the gear train, subjected to a large amount of fatiguing stress. This type of wear may be reduced by providing the pawl member with a bearing mounted in shock absorbing or compressible material, which provides the repeated pawl member and gear train engagement with a small amount of stress reducing play.

In practice, pawl member 10, with gear engaging means 12, is mounted on an axial support member (not shown) through bearing insert 14, for rotating movement about the axial member. Bearing insert 14 is comprised of molded plastic support member 16 surrounding and supporting a cylindrical bearing member 18. The plastic material comprising support member 16 is slightly compressible to act as a shock absorbing member against forces exerted on the pawl, to provide a small amount of play in the pawl member and gear train engagement, thereby reducing the fatiguing stress of repeated engagement. Bearing insert 14 may generally be of a cylindrical shape, with molded plastic support member 16 concentrically supporting bearing member 18.

Volume 12 Number 6 November/Decernber 1987 257

10

/-

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SHOCK ABSORBENT PAWL MEMBER (Cont'd)

As an alternative to the described arrangement, a greater amount of shock absorbing plastic material may be provided for the bearing member 18 in a d...