Tolerance rings aid cool automotive design
A
Saint-Gobain Performance Plastics Rencol product story
Edited by the Engineeringtalk editorial team
Nov 30, 2004
Vehicle air conditioning motors are the latest addition to the growing list of automotive applications to benefit from the use of tolerance rings.
Vehicle air conditioning motors are typically mounted near to the passenger cabin bulkhead in the engine base, where they will be subject to extreme temperature variations.
The demands placed on components often call for accurate control of tolerances in housings and the use of materials which minimise the impact of thermal changes.
The benefits of tolerance rings in such circumstances are now adding to the list of vehicle applications for which they are being adopted.
In air conditioning motors, their use can help minimise the requirement for machining housings and accommodate differential thermal expansion, facilitating wider choice in the materials used.
Ease of assembly and disassembly are additional benefits.
Of further significance, tolerance rings can be used to attenuate vibration and associated noise.
Tolerance rings, essentially spring steel fasteners for jointing annular components, have a damping effect which can translate to reduced incidental noise and can also contribute to extending component life.
Tolerance rings are best known in automotive applications for their use in steering column assemblies.
However, vehicle manufacturers are increasingly adopting them for uses ranging from EPAS installations and electric motors, to sunroof assemblies, mirror mounts and seat levers.
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Tolerance rings improve vehicle efficiency
Due to rising fuel prices, consumer demand is forcing car manufacturers to improve the efficiency of cars by any means possible - lightweight EPAS systems are already being adopted, for instance. -
Tolerance rings created to handle torque overload
Saint-Gobain Performance Plastics Rencol has created tolerance rings to handle torque overload conditions in power tools.
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