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Anti-Backlash, Adjustable Nut for Leadscrew Drive

IP.com Disclosure Number: IPCOM000041402D
Original Publication Date: 1984-Jan-01
Included in the Prior Art Database: 2005-Feb-02

Publishing Venue

IBM

Related People

Authors:
Poluzzi, HB Valinski, RC [+details]

Abstract

In precision leadscrew drive assemblies, the nut portion typically must be replaced when wear becomes excessive. Disclosed is a two-piece nut assembly which is adjustable by means of shims, to thereby compensate for nut wear and minimize backlash. 2p. Fig. 1 illustrates the two-piece nut assembly. Sections 1 and 2 are held together with flange screws 3. When wear is experienced, one or more shims 4 may be inserted to achieve the proper nut tolerance and anti-backlash characteristics. Alternatively, a multilayer or peel-away shim may be provided with the assembled nut, and one or more layers may be peeled away when nut wear becomes excessive. Fig. 2 illustrates the nut assembly mounted on leadscrew drive 5. Fig. 3 illustrates a top view of shims 4.