Scroll type compressor and rotation preventing mechanism used in the same
AssigneeSanden Corporation
InventorToshiyuki Kikuchi
Life of this patent
Estimating the term…
Abstract
A ball coupling constituting a rotation preventing mechanism (77) includes a first annular race section (59, 79) having a thrust ball transfer surface formed on one surface thereof, a second annular race section (61, 81) having a ball transfer surface formed on one surface thereof confronting the one surface of the first race section and thrust balls (67) interposed between the first and second race sections (79, 81). At least one of the first and second race sections has a cross sectional shape such that the central portion of the other surface (87) thereof confronting the one surface is a recessed groove (89). A scroll type compressor includes the rotation preventing mechanism on the back surface of a movable scroll member.
Claims8
A rotation preventing mechanism consisting substantially of a ball coupling, said ball coupling comprising a first annular race section having a substantially flat thrust ball transfer surface formed on one surface thereof, a second annular race section having a substantially flat thrust ball transfer surface formed on one surface thereof confronting the one surface of the first race section, and a plurality of thrust balls interposed between the first and second race sections, wherein at least one of the first and second race sections has a cross sectional shape, such that an annular central portion of the other surface thereof confronting the one surface is recessed.
A scroll type compressor for compressing and discharging drawn in refrigerant by executing a turning motion by one of a pair of scroll members disposed in confrontation with each other while preventing the rotation of the one of the scroll members on its axis with respect to other by a rotation preventing mechanism consisting substantially a ball coupling, said ball coupling comprising:
- a first annular race section having a substantially flat thrust ball transfer surface formed on one surface thereof;
- a second annular race section having a substantially flat thrust ball transfer surface formed on one surface thereof confronting the one surface of said first race section;
- and
- a plurality of thrust balls interposed between said first and second race sections,
- wherein at least one of said first and second race sections has a cross sectional shape, such that an annular central portion of the other surface thereof confronting the one surface is recessed.
Dependencies are inferred from the claim text.