Title:
LEVELING DEVICE FOR HIGH LIFT WORK VEHICLE
Document Type and Number:
Japanese Patent JP3662160
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To conduct leveling control free from any disturbance even in a large load from a working table, without enlarging a size of a leveling cylinder.
SOLUTION: This leveling device is provided with a leveling control valve 35 for controlling oil pressure supply to the leveling cylinder 23 in response to turn-up and -down of a boom to hold the working table in a horizontal condition, a continuous delivery type hydraulic booster unit 60 for amplifying the oil pressure supplied to the leveling cylinder, and a working table load detector 45 for detecting the load acting on the cylinder from the working table. When the load detected by the detector 45 is a prescribed value or less, direct oil pressure supply from a hydraulic pump P to the leveling cylinder is carried out without using the booster unit 60. When the load detected by the detector exceeds the prescribed value, the oil pressure from the pump P is amplified by the booster unit 60 to supply it to the cylinder 23.
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Inventors:
Tsutomu Takeda
Application Number:
JP2000051255A
Publication Date:
June 22, 2005
Filing Date:
February 28, 2000
Export Citation:
Assignee:
Aichi Corporation
International Classes:
B66F9/06; B66F9/22; (IPC1-7): B66F9/06; B66F9/22
Domestic Patent References:
| JP9224354A | ||||
| JP62093200A | ||||
| JP60056800A | ||||
| JP4087002U |
Attorney, Agent or Firm:
Masago Onishi
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