Title:
油圧駆動装置
Document Type and Number:
Japanese Patent JP6663539
Kind Code:
B2
Abstract:
A first torque control proportional electromagnetic valve (37) is connected through a first torque control line (41) to a third pressure receiving chamber (32D) in a first torque control regulator (32). A second torque control proportional electromagnetic valve (38) is connected through a second torque control line (42) to a third pressure receiving chamber (35D) in a second torque control regulator (35). The first and second torque control proportional electromagnetic valves (37, 38) are controlled by a controller 47. A switching valve (48) is provided between the first torque control line (41) and the second torque control line (42). The switching valve (48) supplies an output pressure of the first torque control proportional electromagnetic valve (37) to the third pressure receiving chamber (35D) in the second torque control regulator (35) at the time of driving hydraulic motors (2B, 2C) for left side and right side traveling.
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Inventors:
Research Takahashi
Koji Ishikawa
Yasuki Tsuriga
Masatoshi Hoshino
Hijikata Seiji
Koji Ishikawa
Yasuki Tsuriga
Masatoshi Hoshino
Hijikata Seiji
Application Number:
JP2019509566A
Publication Date:
March 11, 2020
Filing Date:
September 08, 2017
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
F15B11/22; B62D11/04; E02F9/22
Domestic Patent References:
| JP201078047A | ||||
| JP2009299288A | ||||
| JP11132202A |
Attorney, Agent or Firm:
Hirowa Patent Office