US 2015/0308081 A1Published application

Work vehicle

AssigneeKomatsu Ltd.

InventorsTakeshi Takaura, Yoshiki Kami, Jin Kitajima

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Abstract

There is provided a work vehicle in which sudden operation of a work implement can be suppressed. The work vehicle includes a design surface information acquiring unit for acquiring data of a design surface indicative of a target shape of a work object by the work implement; a cutting edge position computing unit for computing a position of a cutting edge of a bucket; and an operation restricting unit for executing operation restriction control by which a boom is forcibly raised in accordance with a relative position of the cutting edge to the design surface, and the position of the cutting edge is restricted to an upper part of the design surface. In a state where the cutting edge is located away from the design surface in a downward perpendicular direction by a prescribed distance or longer, the operation restricting unit does not execute the operation restriction control.

Claims13

Dependent claims

A work vehicle, comprising:

a work implement having a boom, an arm attached to a distal end of said boom, and a bucket attached to a distal end of said arm;
a design surface information acquiring unit for acquiring data of a design surface indicative of a target shape of a work object by said work implement;
a cutting edge position computing unit for computing a position of a cutting edge of said bucket;
and
an operation restricting unit for executing operation restriction control by which said boom is forcibly raised in accordance with a relative position between the position of said cutting edge of said bucket and said design surface, and the position of said cutting edge is restricted to an upper part of said design surface, wherein
in a state where said cutting edge is located away from said design surface in a downward perpendicular direction by a prescribed distance or longer, said operation restricting unit executes control so as not to execute said operation restriction control.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/372,472Filed 24 Apr 2014
Published: 29 Oct 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

E02F 3/439
For dipper-arms, backhoes or the like: automatic repositioning of the implement, e.g. automatic dumping, auto-return
E02F 3/32
With a dipper-arm pivoted on a cantilever beam , i.e. boom: working downwardly and towards the machine, e.g. with backhoes
E02F 3/437
For dipper-arms, backhoes or the like: providing automatic sequences of movements, e.g. linear excavation, keeping dipper angle constant
E02F 9/2033
Particular purposes of control systems not otherwise provided for: limiting the movement of frames or implements, e.g. to avoid collision between…