Title:
HYDRAULIC SYSTEM AND CONTROL METHOD FOR LEVELING CYLINDER OF FACE SHOVEL HYDRAULIC EXCAVATOR
Document Type and Number:
WIPO Patent Application WO/2024/022460
Kind Code:
A1
Abstract:
The present invention relates to the technical field of excavators, and particularly relates to a hydraulic system and control method for a leveling cylinder of a face shovel hydraulic excavator. The hydraulic system comprises a two-position four-way change-over valve, a three-position four-way change-over valve I and a three-position four-way change-over valve II; a first working oil port of the three-position four-way change-over valve I is communicated with a large cavity of a boom cylinder, and a second working oil port of the three-position four-way change-over valve I is communicated with a small cavity of the boom cylinder; the two-position four-way change-over valve is provided between the boom cylinder and the leveling cylinder. When the leveling cylinder is in an initial position, the large cavity of the boom cylinder is communicated with a large cavity of the leveling cylinder, and the small cavity of the boom cylinder is communicated with a small cavity of the leveling cylinder; when the leveling cylinder is in a working position, the large cavity of the boom cylinder is communicated with the small cavity of the leveling cylinder, and the small cavity of the boom cylinder is communicated with the large cavity of the leveling cylinder. According to the present invention, actions of the leveling cylinder are accurately regulated and controlled by means of the two-position four-way change-over valve, fully exerting the auxiliary effect of the leveling cylinder under different actions of the excavator.
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Inventors:
ZHANG ZHIYANG (CN)
YANG YUFENG (CN)
WEN JUN (CN)
WANG CHUNLEI (CN)
WANG YUNXIAN (CN)
QU LIHONG (CN)
ZHANG CONGCONG (CN)
LIU YONGCAN (CN)
FU GUISHAN (CN)
SHI WEIJIE (CN)
YANG HAORAN (CN)
SHI LIJING (CN)
SHI JIJIANG (CN)
LV JIANSEN (CN)
LI XIANJUN (CN)
LI ZHIPENG (CN)
LIU KAI (CN)
WANG PENG (CN)
YANG YUFENG (CN)
WEN JUN (CN)
WANG CHUNLEI (CN)
WANG YUNXIAN (CN)
QU LIHONG (CN)
ZHANG CONGCONG (CN)
LIU YONGCAN (CN)
FU GUISHAN (CN)
SHI WEIJIE (CN)
YANG HAORAN (CN)
SHI LIJING (CN)
SHI JIJIANG (CN)
LV JIANSEN (CN)
LI XIANJUN (CN)
LI ZHIPENG (CN)
LIU KAI (CN)
WANG PENG (CN)
Application Number:
PCT/CN2023/109677
Publication Date:
February 01, 2024
Filing Date:
July 27, 2023
Export Citation:
Assignee:
XUZHOU XCMG MINING MACHINERY CO LTD (CN)
International Classes:
E02F9/22; E02F3/43; F15B11/20
Foreign References:
| CN115095567A | 2022-09-23 | |||
| EP0072539A2 | 1983-02-23 | |||
| JPS5811232A | 1983-01-22 | |||
| US4923362A | 1990-05-08 | |||
| CN108316389A | 2018-07-24 | |||
| CN105421509A | 2016-03-23 | |||
| CN110359516A | 2019-10-22 | |||
| CN114457869A | 2022-05-10 | |||
| CN204213075U | 2015-03-18 | |||
| CN215927947U | 2022-03-01 |
Attorney, Agent or Firm:
XUZHOUSHI SANLIAN PATENT AGENCY (CN)
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