Hydraulic motor with stationary axle and rotating fluid distributor
US4700613A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Aug 22, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF03C1/2415
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a hydraulic motor, which comprises a surrounding frame casing; an internal cylinder block with radially arranged cylinders and a stationary axle of the hydraulic motor attached thereto; pistons reciprocating in the cylinders and bearing the inner surface of the frame casing, which surface is formed as a running surface guiding the movement of the pistons; a fluid distributor mounted around the axle to rotate together with the frame casing, for the distribution of the hydraulic fluid into cylinder chambers and away therefrom via openings provided in the cylinder block; and feed and exhaust channels for the hydraulic fluid. The object of the invention is to improve such a hydraulic motor by compensating, without complicated balancing elements, the force caused by the pressurized hydraulic fluid and separating the fluid distributor and the cylinder block. This has been solved according to the invention in such a manner that a ring space is formed between the fluid distributor and the axle, by means of stepped counter surfaces of the axle and the fluid distributor, said ring space being formed in the feed channel for the hydraulic fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.