Title:
PARKING BRAKE CYLINDER AND BRAKE CALIPER UNIT
Document Type and Number:
WIPO Patent Application WO/2022/142541
Kind Code:
A1
Abstract:
A parking brake cylinder and a brake caliper unit. The parking brake cylinder comprises a brake cylinder cavity formed by a brake cylinder body (2) and an intermediate body (1), a brake piston (3) being arranged inside the brake cylinder cavity; a parking cylinder cavity formed by a parking cylinder body (4) and the intermediate body (1), and at least two sealed chambers (401) being provided in the parking cylinder cavity; a force transfer assembly placed in the parking cylinder cavity, the force transfer assembly comprising a parking lead screw (5), a parking nut (6) arranged outside the parking lead screw (5) in a sleeved manner, and a ratchet wheel (7) arranged at the other end of the parking lead screw (5) in a sleeved manner; at least two force transfer rods (8), one end of each of which is connected to the brake piston (3), and the other end of each of which passes through the intermediate body (1) to be connected to the parking nut (6); compression springs (140) arranged on the force transfer rods (8) in a sleeved manner and between the intermediate body (1) and the parking nut (6); a plurality of parking pistons (9) arranged corresponding to the sealed chambers (401) and circumferentially and symmetrically mounted on the parking nut (6); and a relieving device (10) matching the ratchet wheel (7).
Inventors:
ZHANG XIN (CN)
QIN LIWEI (CN)
LI PEISHU (CN)
WANG FENGZHOU (CN)
XU SHAOTING (CN)
DIAO YOUBIN (CN)
QIN LIWEI (CN)
LI PEISHU (CN)
WANG FENGZHOU (CN)
XU SHAOTING (CN)
DIAO YOUBIN (CN)
Application Number:
PCT/CN2021/121136
Publication Date:
July 07, 2022
Filing Date:
September 28, 2021
Export Citation:
Assignee:
CRRC QINGDAO SIFANG ROLLING STOCK RES INST CO LTD (CN)
QINGDAO SRI TECH CO LTD (CN)
QINGDAO SRI TECH CO LTD (CN)
International Classes:
B61H11/06; F16D65/18; F16D65/14
Foreign References:
| CN112797095A | 2021-05-14 | |||
| CN103511517A | 2014-01-15 | |||
| CN103318157A | 2013-09-25 | |||
| CN109296680A | 2019-02-01 | |||
| CN109094604A | 2018-12-28 | |||
| CN104847815A | 2015-08-19 | |||
| CN111071289A | 2020-04-28 | |||
| CN106763342A | 2017-05-31 | |||
| FR2473143A1 | 1981-07-10 |
Attorney, Agent or Firm:
QINGDAO LAWSCI INTELLECTUAL PROPERTY CO., LTD. (CN)
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