Title:
HYDRAULIC STEERING DEVICE FOR AGRICULTURAL WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2021/015528
Kind Code:
A1
Abstract:
The present invention relates to a hydraulic steering device for an agricultural work vehicle, the device comprising: a steering pump for supplying working fluid; an automatic steering unit which is connected to the steering pump, and which changes, according to automatic steering performed by a control part, the traveling direction of the agricultural work vehicle by using the working fluid supplied from the steering pump; a manual steering unit which is connected to each of the steering pump and the automatic steering unit, and which changes, according to manual steering performed by the operation of a steering wheel, the traveling direction of the agricultural work vehicle; and a manual switching unit connected to each of the steering pump and the manual steering unit, wherein the manual steering unit is connected to the steering pump through the manual switching unit, the manual switching unit blocks the working fluid supplied from the steering pump so as to prevent same from passing therethrough when automatic steering is performed in a state in which manual steering is not performed, and causes the working fluid supplied from the steering pump to pass therethrough when automatic steering is not performed in a state in which manual steering is not performed or manual steering is performed, and the manual steering unit changes, when manual steering is performed, the traveling direction of the agricultural work vehicle by using the working fluid supplied from the steering pump through the manual switching unit.
Inventors:
LEE SANG HEON (KR)
Application Number:
PCT/KR2020/009578
Publication Date:
January 28, 2021
Filing Date:
July 21, 2020
Export Citation:
Assignee:
LS MTRON LTD (KR)
International Classes:
A01B69/04; B62D5/06; B62D5/065
Foreign References:
| JP2003118615A | 2003-04-23 | |||
| JP2006131110A | 2006-05-25 | |||
| KR19980060566A | 1998-10-07 | |||
| US6067782A | 2000-05-30 | |||
| JP2000300010A | 2000-10-31 |
Other References:
See also references of EP 4005361A4
Attorney, Agent or Firm:
ASTRAN INT'L IP GROUP (KR)
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