Title:
斜軸式液圧回転機
Document Type and Number:
Japanese Patent JP7211747
Kind Code:
B2
Abstract:
To provide an inclined shaft type liquid pressure rotary machine capable of accurately forming a separating portion of a piston ring.SOLUTION: A piston ring installation groove 12C of a piston 12 is installed with a piston ring 15. The piston ring 15 has a separating portion 15E which enables the piston ring 15 to be installed at the piston ring installation groove 12C, and becomes a throttle passage for supplying an oil liquid in a cylinder hole 10 to a contact part between a small spherical portion 12D of the piston 12 and an inner peripheral surface of the cylinder hole 10. On an inner peripheral surface 15B of the piston ring 15, an inner peripheral notch 16 extending in an axial direction is formed. On the other side surface 15D of the piston ring 15, a side surface notch 17 continuing to the inner peripheral notch 16 and extending in the axial direction is formed. The separating portion 15E of the piston ring 15 is formed along the inner peripheral notch 16 and the side surface notch 17.SELECTED DRAWING: Figure 3
Inventors:
Go Unno
Application Number:
JP2018178766A
Publication Date:
January 24, 2023
Filing Date:
September 25, 2018
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
F04B1/24; F16J9/20
Domestic Patent References:
| JP63168363U | ||||
| JP52150801U | ||||
| JP5164248A | ||||
| JP50128047A |
Attorney, Agent or Firm:
Patent Attorney Corporation Hirowa Patent Office