Title:
WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2020/137581
Kind Code:
A1
Abstract:
In the present invention, a hydraulically-operated vehicle-height adjustment mechanism 40 is capable of switching the relative height of a plurality of running wheels S, which are supported on a vehicle body frame via stretchable tubular support members 19, with respect to the vehicle body frame within a predetermined length range by stretching/shrinking the support members 19 using hydraulic cylinders 41, the mechanism being provided with: hydraulic control valves which are provided to the respective running wheels S and are capable of controlling the state of supply of hydraulic oil to the respective hydraulic cylinders 41; a control unit which controls an operation of the hydraulic control valves so that, with respect to variation in the attitude of a vehicle body, the vehicle body can have a target state as a result of vehicle height adjustment using the hydraulic cylinders; and a plurality of accumulators connected to oil chambers for the hydraulic cylinders.
Inventors:
TAMAI TAKUYA (JP)
ISHIKAWA JUNICHI (JP)
HIRAOKA MINORU (JP)
ISHIKAWA JUNICHI (JP)
HIRAOKA MINORU (JP)
Application Number:
PCT/JP2019/048680
Publication Date:
July 02, 2020
Filing Date:
December 12, 2019
Export Citation:
Assignee:
KUBOTA KK (JP)
International Classes:
B60G17/04
Foreign References:
| JP2013006541A | 2013-01-10 | |||
| JP2008247357A | 2008-10-16 | |||
| JPH04191109A | 1992-07-09 | |||
| JPH07276956A | 1995-10-24 | |||
| JPH10297485A | 1998-11-10 | |||
| GB2324512A | 1998-10-28 | |||
| JP2003094907A | 2003-04-03 |
Other References:
See also references of EP 3904135A4
Attorney, Agent or Firm:
R&C IP LAW FIRM (JP)
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