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Title:
農業用車輌
Document Type and Number:
Japanese Patent JP4195322
Kind Code:
B2
Abstract:

To provide an easy-to-handle agricultural vehicle capable of automatically correcting a steering angle of front and rear wheels to a proper value for safe traveling.

The agricultural vehicle for manually changing over between two-wheel steering and four-wheel steering is provided with sensors 18, 28 detecting the steering angles of the front wheels 10a, 10b and the rear wheels 20a, 20b, and a solenoid valve 34 allowing hydraulic pressure from a hydraulic pump 30 to act on a front wheel driving hydraulic cylinder 12 and a rear wheel driving hydraulic cylinder 22 while changing over. The agricultural vehicle is further provided with a control means obtaining the proper steering angle of the rear wheels to be set as a rear wheel target value, having the steering angle of the rear wheels to pass through the rear wheel target value, switching the solenoid valve to either of a two-wheel steering position, a four-wheel steering position of the same phase and the four-wheel steering position of the opposite phase to act on the rear wheel driving hydraulic cylinder, and correcting the rear wheels to have the normal steering angle as a means for correcting the front and rear wheels to have the proper steering angles when the steering angles of the front and rear wheels are out of the normal values at the start of an engine.

COPYRIGHT: (C)2005,JPO&NCIPI


Inventors:
Takahiro Watanabe
Application Number:
JP2003080687A
Publication Date:
December 10, 2008
Filing Date:
March 24, 2003
Export Citation:
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Assignee:
Shoshin Co., Ltd.
International Classes:
A01B69/00; B62D6/00; B62D7/14; B62D113/00
Domestic Patent References:
JP5012143Y2
JP62265076A
JP3281480A
JP8198130A
JP63049589A
JP59227563A
JP63153608A
JP4053750B2
JP11263242A
JP2115073U
JP2125478U
Attorney, Agent or Firm:
Takao Watanuki
Horimai Kazuharu