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US 7,214,043 B2Granted
Scroll type hydraulic machine
AssigneeSanden Corporation
InventorsKou Tsukamoto, Yuji Takei, Kohzou Kakehi, Takeshi Nakagawa
Life of this patent
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Abstract
A scroll type hydraulic machine is provided with a scroll unit received in a housing, and a thrust bearing arranged between a movable scroll of the scroll unit and a support surface of the housing and receiving a thrust load of the movable scroll, and the thrust bearing includes a plurality of circular retention holes formed in the support surface, and sliding discs rotatably fitted into these retention holes and sliding with respect to both inner surfaces of the retention holes and the movable scroll.
Claims17
A scroll type hydraulic machine comprising:
- a housing;
- a scroll unit received in said housing, said scroll unit including a stationary scroll, a movable scroll executing a revolving motion in a state in which the movable scroll is inhibited from rotating around on an axis thereof and pressure chambers defined between the stationary scroll and the movable scroll, and reducing or increasing volumetric capacity of the respective pressure chambers while the movable scroll is revolved;
- a plurality of self-rotating stoppers formed in a support surface of said housing and arranged at intervals in a peripheral direction of the movable scroll to prevent the movable scroll from rotating on its own axis;
- and
- a thrust bearing provided between the support surface of said housing and the movable scroll, and receiving a thrust load of the movable scroll,
- wherein said thrust bearing includes a plurality of retention holes formed in the support surface and open toward the movable scroll and arranged at intervals in a peripheral direction of the movable scroll, a plurality of sliding discs rotatably located within the retention holes and allowing sliding motion with respect to both of inner surfaces of the retention holes and the movable scroll, and a plurality of clearances disposed between each sliding disc and an inner peripheral surface of the corresponding retention hole.
3 more elements
A scroll type hydraulic machine comprising:
- a housing;
- a scroll unit received in said housing, said scroll unit including a stationary scroll, a movable scroll executing a revolving motion in a state in which the movable scroll is inhibited from rotating around on an axis thereof and pressure chambers defined between the stationary scroll and the movable scroll, and reducing or increasing volumetric capacity of the respective pressure chambers while the movable scroll is revolved;
- and
- a thrust bearing provided between a support surface of said housing and the movable scroll, and receiving a thrust load of the movable scroll,
- wherein said thrust bearing includes a plurality of retention holes formed in the support surface and open toward the movable scroll and arranged at intervals in a peripheral direction of the movable scroll, and a plurality of sliding discs rotatably located within the retention holes and allowing sliding motion with respect to both of inner surfaces of the retention holes and the movable scroll,
- wherein each sliding disc has a portion protruded from the support surface, and the protruding portion determines a gap between the support surface and the movable scroll, and
- wherein each retention hole is formed in an annular shape, and the sliding disc is formed in a cup shape in which the sliding disc is allowed to be fitted into the retention hole while having play.
4 more elements
A scroll type hydraulic machine comprising:
- a housing;
- a scroll unit received in said housing, said scroll unit including a stationary scroll, a movable scroll executing a revolving motion in a state in which the movable scroll is inhibited from rotating around on an axis thereof and pressure chambers defined between the stationary scroll and the movable scroll, and reducing or increasing volumetric capacity of the respective pressure chambers while the movable scroll is revolved;
- and
- a thrust bearing provided between a support surface of said housing and the movable scroll, and receiving a thrust load of the movable scroll,
- wherein said thrust bearing includes a plurality of retention holes formed in the support surface and open toward the movable scroll and arranged at intervals in a peripheral direction of the movable scroll, and a plurality of sliding discs rotatably located within the retention holes and allowing sliding motion with respect to both of inner surfaces of the retention holes and the movable scroll, and
- wherein each sliding disc has a portion protruded from the support surface, the protruding portion determines a gap between the support surface and the movable scroll, and the sliding disc has grooves respectively formed in both end surfaces thereof, and these grooves are connected to each other.
3 more elements
Dependencies are inferred from the claim text.