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AssigneesK. K. Toyoda Jidoshokki Seisakusho, Taihou Kogyo Kabushiki Kaisha
InventorsShozo Nakayama, Kimio Kato, Tusneo Sugiura, Yoshio Kato, Mikio Shugiura, Keiichiro Otu
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Disclosed is a sliding shoe for a rotatable swash-plate type refrigerant gas compressor. This shoe is slidably connected between a rotatable swash-plate and a ball rotatably engaged with a piston. One of the major surfaces of the shoe slidably contacts a sliding surface of the swash-plate. A sliding surface of the shoe facing the swash-plate is formed with a flat plane at its center portion and chamfered surface at the remaining portion of the sliding surface. At least the sliding plane of the shoe is coated with a lead alloy. According to the present invention, even if the swash-plate type compressor has no lubrication, abrasion and seizing of the shoe can be reduced to a great extent.
In a sliding shoe for a rotatable swash-plate type refrigerant gas compressor, in which said shoe is slidably connected between a swash-plate secured to a rotatable shaft at a predetermined inclined angle thereto and a ball rotatably engaged with a piston which effects compression of refrigerant gas by means of rotation to the swash-plate, the improvement wherein said shoe has a configuration substantially in the form of a circular disc having a swash-plate engaging surface with a major portion of said surface including a sliding plane for slidably engaging the sliding surface of the swash-plate, said shoe having a lubrication-enhancing surface slightly inclined with respect to the sliding plane within a predetermined distance from the outer periphery of the shoe, so that the cross section of the shoe, through a plane including the axis thereof, is chamfered in a substantially triangular shape having a predetermined angle between the lubrication-enhancing surface and the sliding plane, in such a way that the height H, the width L and the angle .alpha. of the chamfered portion are more than 5.mu., from 0.5 to 2 mm and less than 10.degree., respectively.
In a sliding shoe for a rotatable swash-plate type refrigerant gas compressor, in which said shoe is slidably connected between a swash-plate secured to a rotatable shaft at a predetermined inclined angle thereto and a ball rotatably engaged with a piston which effects compression of refrigerant gas by means of rotation of the swash-plate, the improvement wherein said shoe has a configuration substantially in the form of a circular disc having a swash-plate engaging surface with a major portion of said surface including a sliding plane for slidably engaging the sliding surface of the swash-plate, the outer periphery of the sliding plane of the shoe facing the swash-plate is chamfered and at least said sliding plane of the shoe is coated with a lead alloy, in such a way that the height H, the width L and the angle .alpha. of the chamfered portion are more than 5.mu., from 0.5 to 2 mm and less than 10.degree., respectively, and the thickness of the lead alloy coating is 3 to 15.mu..
Dependencies are inferred from the claim text.