Title:
STEERING DEVICE FOR TRAVELING VEHICLE
Document Type and Number:
Japanese Patent JP3909171
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To inexpensively make turning directions for forwarding and reverse coincide with each other, improve operability and enable a turning operation in the same way as a normal handle operation also in a steering system by an HST.
SOLUTION: Left and right axes are connected via a differential device. A steering HST 120 performing steering by imparting a difference of number of revolution to a planetary gear mechanism of the differential device is arranged. A hydraulic actuator 110 operating a turnnion lever 126 of the HST 120 is driven by hydraulic fluid from a steering valve unit 100. Between the hydraulic actuator 110 and the steering valve unit 100, a forward/reverse switching valve 106 is arranged and the valve 106 is interlocked with a forwarding/reverse detection means 107 provided on a reversal lever. The forwarding/reverse switching valve 106 is provided with a neutral position. When rotation of the axes is not detected by a rotation sensor, the forwarding/ reverse switching valve 106 is switched and operated to the neutral position.
Inventors:
Kitasaka Yuji
Toru Sakai
Toru Sakai
Application Number:
JP22389699A
Publication Date:
April 25, 2007
Filing Date:
August 06, 1999
Export Citation:
Assignee:
Yanmar Co., Ltd.
Seirei Industry Co., Ltd.
Seirei Industry Co., Ltd.
International Classes:
A01B69/00; B62D11/18; B62D11/10; (IPC1-7): B62D11/10; A01B69/00
Domestic Patent References:
| JP10271906A | ||||
| JP10250615A | ||||
| JP4260872A | ||||
| JP8156823A | ||||
| JP11049025A | ||||
| JP9076931A | ||||
| JP54027435U |
Attorney, Agent or Firm:
Juichiro Yano