Work machine
AssigneeKomatsu Ltd.
InventorsTakuya UEMURA, Yusuke YAMAZAKI
Life of this patent
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Abstract
There is provided a work machine that can avoid an unintended movement of a blade. A crawler dozer includes a controller. The controller controls EPC valves. A left tilt cylinder and a right tilt cylinder are asymmetrically attached to a blade. The EPC valves control direction and flow rate of supply of hydraulic oil to the right tilt cylinder. The EPC valves control direction and flow rate of supply of the hydraulic oil to the left tilt cylinder. The controller controls the EPC valves and the EPC valves to extend or contract the left tilt cylinder and the right tilt cylinder at different rates.
Claims7
A work machine comprising:
- a body;
- a blade supported by the body;
- a left hydraulic cylinder and a right hydraulic cylinder that incline the blade forward/rearward and leftward/rightward;
- a left control valve that controls direction and flow rate of supply of hydraulic oil to the left hydraulic cylinder;
- and
- a right control valve that controls direction and flow rate of supply of the hydraulic oil to the right hydraulic cylinder, wherein
- the left hydraulic cylinder and the right hydraulic cylinder are asymmetrically attached to the blade,
- the work machine further comprising a controller that controls the left control valve and the right control valve to extend or contract the left hydraulic cylinder and the right hydraulic cylinder at different rates during a pitch movement of inclining the blade in the forward/rearward direction.
Dependencies are inferred from the claim text.