Title:
SUPPLEMENTARY BRAKING THRUST UNIT FOR BRAKE
Document Type and Number:
WIPO Patent Application WO/2009/089683
Kind Code:
A1
Abstract:
A supplementary braking thrust unit for brake consists of a drive unit (1), a liquid
pump (2) and a liquid storage reservoir (3) and a hydraulic cylinder (4) which
are driven by the drive unit (1). The inlet of the liquid pump (2) is connected with
the liquid storage reservoir (3), the outlet of liquid pump (2) is connected with
the driving fluid cavity (5) of hydraulic cylinder (4), the non-driving fluid
cavity (6) of hydraulic cylinder (4) is connected with the liquid storage reservoir
(3), and the thrusting rod (7) of hydraulic cylinder (4) is used to connect with
the drive arm (8) of brake part (9). Sleeve pipe (12) is arranged outside the thrusting
rod (7), and acts on the mechanism which executes supplementary brake operation
on the brake part (9). The sleeve pipe (12) is extended outwards as the pushing
bar (7) extends outwards, and the sleeve pipe (12) and the thrusting rod (7) can
slide relatively one to the other as the thrusting rod (7) retracts inward. Said
supplementary braking thrust unit also comprises a drive part to impel the sleeve
pipe (12) to extend outwards and to retract.
Inventors:
XIE XINGYUN (CN)
Application Number:
PCT/CN2008/002035
Publication Date:
July 23, 2009
Filing Date:
December 19, 2008
Export Citation:
Assignee:
XIE XINGYUN (CN)
International Classes:
B66B11/04; F16D49/16; F16D65/18
Foreign References:
CN101086283A | 2007-12-12 | |||
CN2216061Y | 1995-12-27 | |||
CN2937582Y | 2007-08-22 | |||
CN101319690A | 2008-12-10 | |||
US5244060A | 1993-09-14 | |||
JP2003343608A | 2003-12-03 |
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD (Bldg. BTsinghua Tongfang Hi-Tech Plaza,No.1, Wangzhuang Rd.,Haidian District, Beijing 3, CN)
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