Hydraulic buffer and cylinder combined with the same
US10738802B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2017 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Jun 15, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/755
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic buffer pertains to the field of hydraulic parts. A signal device (X) is installed at a position close to an end of a cylinder stroke to control movement of slide valves (12, 18, 12a, 12b, 12c, 12d, 12e, 12f, F1, F2, F3, F4) of the hydraulic buffer, to dynamically adjust the degree of valve openness and a liquid flow direction of a buffering module (Y), and therefore control pressure of oil entering an oil returning chamber of a cylinder. The high-pressure chamber of the cylinder releases pressure and unloads, and/or the oil returning chamber throttles to load pressure, such that a moving speed of a cylinder piston (6) at the end of the stroke is controlled, realizing buffering of the cylinder. The device eliminates defects in the prior art in which a buffering mechanism of a cylinder is complex, manufacturing accuracy requirements are high, structural arrangement is difficult, it is difficult to employ a combined configuration in which an oil returning chamber throttles to load pressure and a high-pressure chamber releases pressure and unloads, and buffering efficiency is not high. The device has desirable buffering controllability and high reliability, such that the ov…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.