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Title:
TRAVEL MOTOR SHIFT VALVE, TRAVEL MOTOR AND CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2018/188449
Kind Code:
A1
Abstract:
Disclosed are a travel motor shift valve (100), a travel motor and a construction machine. The travel motor shift valve (100) comprises a valve core (1), a first working oil port (Y), a second working oil port (L), a third working oil port (Z), an external control oil port (X) and a feedback oil port (C). The valve core (1) switches from a low speed to a high speed and from a high speed to a low speed at two different preset values, so that input pressure values of a motor (400) do not satisfy shift boundary conditions after shifting, thereby effectively preventing the travel motor from repeatedly switching between high and low speeds, and reducing construction machine vibration under heavy load conditions.

Inventors:
ZHAO, Bin (No.26, Tuolanshan Road Economic Development Zon, Xuzhou Jiangsu 4, 221004, CN)
WU, Chuanyu (No.26, Tuolanshan Road Economic Development Zon, Xuzhou Jiangsu 4, 221004, CN)
LI, Yang (No.26, Tuolanshan Road Economic Development Zon, Xuzhou Jiangsu 4, 221004, CN)
PRUST, David (No.26, Tuolanshan Road Economic Development Zon, Xuzhou Jiangsu 4, 221004, CN)
Application Number:
CN2018/079068
Publication Date:
October 18, 2018
Filing Date:
March 15, 2018
Export Citation:
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Assignee:
XCMG CONSTRUCTION MACHINERY CO., LTD. (No.26, Tuolanshan Road Economic Development Zon, Xuzhou Jiangsu 4, 221004, CN)
International Classes:
F15B13/02
Foreign References:
CN107795538A2018-03-13
CN204755442U2015-11-11
KR20170073248A2017-06-28
JP2009047312A2009-03-05
CN107131298A2017-09-05
CN206015753U2017-03-15
CN105889574A2016-08-24
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (8th Floor, Vantone New World Plaza 2 Fuchengmenwai Street, Xicheng District, Beijing 7, 100037, CN)
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