Title:
CENTRAL SWIVEL JOINT, HYDRAULIC CONTROL SYSTEM, AND WORKING VEHICLE
Document Type and Number:
WIPO Patent Application WO/2022/021517
Kind Code:
A1
Abstract:
A central swivel joint, a hydraulic control system, and a working vehicle. The central swivel joint (100) comprises: a first rotary body (2), a first oil passage (201) and a second oil passage (202) being provided in the first rotary body (2); a second rotary body (4) sleeved on the outside of the first rotary body (2), the second rotary body (4) and the first rotary body (2) being rotatable relative to each other, and the second rotary body (4) being provided with a first oil port (402) and a second oil port (404); a first annular groove (6) provided in the second rotary body (4), the first oil port (402) being connected to the first annular groove (6); and a second annular groove (8) provided in the second rotary body (4), the second oil port (404) being connected to the second annular groove (8). The first oil passage (201) is in communication with one of the first annular groove (6) and the second annular groove (8), and the second oil passage (202) is in communication with the other one of the first annular groove (6) and the second annular groove (8). Two oil passages are formed in the central swivel joint (100), such that the overall size of the central swivel joint (100) can be reduced, and the axial length of the central swivel joint (100) can be shortened, thus reducing the weight and cost of the central swivel joint (100).
Inventors:
HE DIAN (CN)
TAN XIANWEN (CN)
GENG XIAOCHEN (CN)
TAN XIANWEN (CN)
GENG XIAOCHEN (CN)
Application Number:
PCT/CN2020/110708
Publication Date:
February 03, 2022
Filing Date:
August 24, 2020
Export Citation:
Assignee:
SANY AUTOMOBILE MFG CO LTD (CN)
International Classes:
F16L39/06; F15B13/02; F16L25/01; H01R39/64
Foreign References:
| JPH1194159A | 1999-04-09 | |||
| US4858962A | 1989-08-22 | |||
| CN209130363U | 2019-07-19 | |||
| CN102705619A | 2012-10-03 | |||
| CN205037011U | 2016-02-17 | |||
| JP2001271382A | 2001-10-05 |
Attorney, Agent or Firm:
YOULINK INTELLECTUAL PROPERTY LAW FIRM (CN)
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