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Spare Tire Carrier with Hybrid Cable and Chain

IP.com Disclosure Number: IPCOM000130014D
Publication Date: 2005-Oct-10
Document File: 1 page(s) / 38K

Publishing Venue

The IP.com Prior Art Database

Abstract

A cable "wire rope" is used to lower/raise spare tire, including clutch. A chain is attached to cable which then extends to the spare tire support plate. Use of a chain at distal end of winch cable offers improved resistance to fatigue bending. With chain, bending forces from vehicle and tire relative movement result in sliding among links, instead of bending stress in cable. Most automotive spare tire winches use cable for entire length, with internal clutch to prevent excessive cable tension. Alternative designs utilizing only chain (typical of Asian market) do not have means to limit maximum cable tension. Also, bulk of chain and length required present excess chain storage issue, and NVH risk during normal vehicle operation. Bottom end of winch cable (1) has a chain (6) attached which begins just inside or below the winch housing (7) and extends to spare tire support plate (4). Alternatively, for remotely mounted spare tire carriers, chain could start just prior to location of significant bending stress and deflection, not necessarily at housing. There are several alternate ways to attach the cable and chain. Example shown (2) is a cable loop created and swaged closed overlapping itself, with or without a steel liner (3) to manage friction between chain link and cable loop. Alternate is a swaged steel fitting with a loop clamped onto end of cable. Retainer (5) at wheel support plate could be attached using a bolt, by swaging to loop in wheel plate, via a u-bolt arrangement, or other means.

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Spare Tire Carrier With Hybrid Cable and Chain

Cable "wire rope" used to lower/raise spare tire, including clutch.  Chain is attached to cable which then extends to the spare tire support plate. 

                                 

Hardware:

1)       Multi-strand cable "wire rope".  Typical of most winches in production for US.

2)       Steel crimp to close loop in cable.

3)       Steel reinforcement lining inside of cable (if required, for wear resistance).

4)       Spare tire support plate.  Typical of most winches.

5)       Retainer – placed through chain loop to secure chain to spare tire support plate.

6)       Hardened steel chain – typical of Asian market winches

7)       Winch mechanism housing – Typical of most winches in production for US.

8)       Winch cable spool with clutch – typical of most winches in production for US.

Description of Concept:

Use of a chain at distal end of winch cable offers improved resistance to fatigue bending. With chain, bending forces from vehicle and tire relative movement result in sliding among links, instead of bending stress in cable.

Most automotive spare tire winches use cable for entire length, with internal clutch to prevent excessive cable tension.  Alternative designs utilizing only chain (typical of Asian market) do not have means to limit maximum cable tension.  Also, bulk of chain and length required present excess chain storage issue, and NVH risk during normal vehicle operation.

Bottom end of winch cable (1) has a chain (6...