Vehicle air conditioning compressor
AssigneesTaihou Kogyo Kabushiki Kaisha, Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsTeruaki Inoshita, Takashi Fukuda, Hitoshi Toga, Hikaru Takaoka
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Abstract
A vehicle air conditioning compressor which is driven by e.g., the prime mover of the vehicle as required to cool the passenger compartment comprises a swash plate mounted on a rotatable shaft and a plurality of pistons, each being reciprocated by the rotating swash plate via a set of a ball and a shoe rotatably engaging with each other, wherein said compressor is provided for each piston with a shoe composed of a steel backing plate having a sintered porous layer integrally formed thereon of a powdered copper alloy comprising 2.5 - 12.1 wt.% Sn, 7.0 - 25.0 wt.% Pb and the balance being substantially copper, in a critical thickness ranging from 0.1 mm to 0.5 mm.
Claims3
In a vehicle air conditioning compressor having a swash plate mounted on a rotatable shaft and a plurality of pistons, each of which is slidably engaged with the swash plate through intermediary of a set of a ball means and a shoe means rotatably engaging with one another and slidably reciprocates inside a cylinder bore of a common cylinder block in accordance with rotation of the swash plate, an improvement wherein:
- each said shoe comprises an imperforate ferrous backing plate as a major part thereof and a continuous, imperforate, sintered porous layer of a copper alloy, which is relatively thin with respect to said major part, formed integrally on said backing plate in slidable contact with said swash plate, said sintered layer having a thickness in the range of from 0.3 mm to 0.5 mm and consisting essentially of tin in a range of from 2.5 to 12.1 percent by weight and lead in a range of from 7.0 to 25.0 percent by weight with the balance by weight being copper.
Dependencies are inferred from the claim text.