Title:
LOADING WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2020/065914
Kind Code:
A1
Abstract:
Provided is a loading work vehicle that can improve work efficiency even when work is performed on a slippery road surface. A wheel loader 1 with a hydrostatic transmission (HST) travel drive comprises a depression amount detector 610, a delivery pressure detector 75, a mode switching device 60, and a controller 5. The controller 5: determines whether a restricted mode has been selected in the mode switching device 60; identifies the operation state of the wheel loader 1 when the restricted mode is determined to have been selected; limits the maximum pull force to a first set value, which is set on the basis of the coefficient of static friction μ and the vehicle weight, when a bucket 23 is determined to penetrate the ground 100; and increases the maximum pull force from the first set value when excavation is determined to start on the ground 100.
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Inventors:
HYODO KOJI (JP)
YOSHIKAWA MASAKI (JP)
TANAKA TETSUJI (JP)
NUKII MASAKI (JP)
YOSHIKAWA MASAKI (JP)
TANAKA TETSUJI (JP)
NUKII MASAKI (JP)
Application Number:
PCT/JP2018/036236
Publication Date:
April 02, 2020
Filing Date:
September 28, 2018
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/22; B66F9/24; E02F3/43; F16H61/40
Foreign References:
| JP5092071B1 | 2012-12-05 | |||
| JPS57180511A | 1982-11-06 | |||
| JPS5129493B2 | 1976-08-26 |
Other References:
See also references of EP 3839151A4
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (JP)
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