Title:
SELF-VARIABLE FORCE HYDRAULIC DAMPER
Document Type and Number:
WIPO Patent Application WO/2021/218697
Kind Code:
A1
Abstract:
A self-variable force hydraulic damper (11), comprising a housing assembly (2), a piston rod (3) and a piston assembly (4); the piston assembly (4) is mounted on the piston rod (3), and comprises, in sequence, a first gasket member (41), a first disc spring (42), a first valve plate (43), a variable position piston (44), a second valve plate (45), a second disc spring (46) and a second gasket member (47); the variable position piston (44) has a first end face (441) and a second end face (442), and is further provided with a first circulation hole (443) and a second circulation hole (444) which penetrate through the first end face (441) and the second end face (442); the first valve plate (43) is pressed against the first end face (441) under the action of the first disc spring (42), and the first valve plate (43) covers the first circulation hole (443) but does not cover the second circulation hole (444); and the second valve plate (45) is pressed against the second end face (442) under the action of the second disc spring (46), and the second valve plate (45) covers the second circulation hole (444) but does not cover the first circulation hole (443).
Inventors:
MAO LINA (CN)
LI RONG (CN)
LI RONG (CN)
Application Number:
PCT/CN2021/088294
Publication Date:
November 04, 2021
Filing Date:
April 20, 2021
Export Citation:
Assignee:
NINGBO KASICO SHOCK ABSORBER MFT CO LTD (CN)
International Classes:
F16F15/027; F16F9/32; F16F9/34; F16F9/348; F16F9/50; F16F9/512
Foreign References:
| CN111927919A | 2020-11-13 | |||
| CN212616056U | 2021-02-26 | |||
| CN211820540U | 2020-10-30 | |||
| DE3503153A1 | 1985-08-01 | |||
| CN208686865U | 2019-04-02 | |||
| KR20040052347A | 2004-06-23 | |||
| KR20180108058A | 2018-10-04 |
Other References:
See also references of EP 3933227A4
Attorney, Agent or Firm:
BEIJING WEIZHENG PATENT AGENCY CO., LTD. (CN)
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