Lightweight heavy duty bushing with easy assembly
a heavy-duty bushing and assembly technology, applied in the direction of spring/damper manufacture, couplings, mechanical devices, etc., can solve the problem of not translating the inner of the bar pin, and achieve the effect of adequate frictional for
Inactive Publication Date: 2009-03-05
HENDRICKSON USA L L C
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Benefits of technology
The present invention is a vehicle suspension bushing assembly that includes a ductile inner metal bar pin with a non-circular cross section that has voids for maximum strength at minimum weight. The ductile inner metal bar pin is press fit into a bushing made of rubber bonded or secured to a metal sleeve. The resulting assembly has adequate frictional force to prevent the inner metal bar pin from translating within the metal sleeve under service duty. The invention allows for a single-step operation to insert the entire bushing assembly into a vehicle suspension component such as a torque rod. Other built-in features include the ability to adjust the position of the inner metal bar pin and the use of a rubber bushing to absorb impact and reduce noise.
Problems solved by technology
The press fit assembly has adequate frictional force such that the inner metal bar pin does not translate within the metal sleeve under service duty.
Method used
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[0038]FIGS. 1-4 illustrate a lightweight heavy duty bushing assembly 10 for vehicle suspensions. A ductile inner metal bar pin 30 is press fit into a bushing 20. The ductile inner metal bar pin 30 has a central portion 31 with a cruciform cross-section that is comprised of voids 32 bounded by radially extending contact surfaces 33. The ductile inner metal bar pin 30 has an end portion 35 that extends beyond each end of the central portion 31. Each extended end portion 35 of the ductile inner metal bar pin 30 has a hole 37 through it for attachment to vehicle suspension components, mounting brackets, or to the vehicle frame (not shown). The ductile inner metal bar pin 30 is preferably cast of metal material, such as iron. Alternatively, the ductile inner metal bar pin 30 could be cast from other materials or the ductile inner metal bar pin 30 could be forged or machined from a variety of materials.
[0039]The bushing 20 is comprised of a metal sleeve 40 that is attached such as by bond...
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Abstract
A lightweight heavy duty bushing assembly for use in a vehicle suspension system and being low cost and having a high assembly tolerance is disclosed. A metal bar pin is press fit into a bushing formed from a metal sleeve bonded to an elastomeric housing. The metal sleeve is deformable such that exact tolerances of the metal sleeve and the bar pin are not required. The metal bar pin has extended ends with a hole in each end for attachment of the metal bar pin to vehicle suspension components, mounting brackets, or to the vehicle frame.
Description
BACKGROUND OF THE INVENTION[0001]The present invention is generally directed to bushing assemblies in vehicle suspension systems. More specifically, the present invention is directed to a unique construction of bushing assemblies used in vehicle suspension systems.[0002]Vehicle suspension bushing assemblies are known. One such bushing assembly may be formed from a round inner metal bar pin that is an elongated piece of metal such as cast iron which is contained within a combination of a circular metal sleeve attached to an elastomeric material such as rubber. The circular metal sleeve and the round bar pin must be machined to very exact tolerances to properly fit together. The increased machining and processing of the components due to the required low tolerances increases costs. The circular bar pin may be heavy, which leads to increased material, manufacturing and shipping costs.[0003]Another known bushing assembly may be formed from a round inner metal bar pin that is a machined ...
Claims
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IPC IPC(8): F16F1/38
CPCF16F1/3842F16F1/3863F16F2226/045Y10T403/4949Y10T403/32737Y10T29/49826Y10T403/4966Y10T403/455Y10T403/7061
Inventor VOGLER, RICHARD GREGORYBRANNIGAN, MICHAELDUDDING, ASHLEY THOMASFORREST, CHRISTOPHER WAYNE
Owner HENDRICKSON USA L L C