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Title:
HYDRAULIC CUSHIONING DEVICE AND CUSHIONING CYLINDER COMPRISING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/215631
Kind Code:
A1
Abstract:
A hydraulic cushioning device is disclosed pertaining 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 cushioning device, so as to dynamically adjust the degree of valve openness and a liquid flow direction of a cushioning valve (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 cushioning of the cylinder. A cushioning cylinder comprising the device is also disclosed. The device eliminates defects in the prior art in which a cushioning mechanism of a cushioning 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 cushioning efficiency is not high. The device has desirable cushioning controllability and high reliability, such that overall quality is improved.

Inventors:
ZHU, Dewei (Baoli Baihe Garden Plot, No.12 Jinhua Branch Road Shibei Distric, Qingdao Shandong 4, 266044, CN)
Application Number:
CN2017/088436
Publication Date:
December 21, 2017
Filing Date:
June 15, 2017
Export Citation:
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Assignee:
ZHU, Dewei (Baoli Baihe Garden Plot, No.12 Jinhua Branch Road Shibei Distric, Qingdao Shandong 4, 266044, CN)
International Classes:
F15B15/22; F15B13/02
Foreign References:
CN105889173A2016-08-24
CN205744685U2016-11-30
CN104747535A2015-07-01
CN102094867A2011-06-15
US7528332B12009-05-05
DE202013010972U12015-03-16
Attorney, Agent or Firm:
QINGDAO FIRST PATENT & TRADEMARK AGENT CO., LTD. (Room 501, Jufeng Venture BuildingNo.52 Miaoling Road, Laoshan Distric, Qingdao Shandong 1, 266061, CN)
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