Patent ID: 8538640

Claim:
A travel damper control device mounted on a wheel loader, the wheel loader including a pair of booms, a rotary shaft, a bell crank, a work implement, a boom cylinder and an accumulator, the pair of booms being coupled by a cross tube arranged along a vehicle width direction, the rotary shaft being arranged along the vehicle width direction and attached to the cross tube, the bell crank being attached pivotably about the rotary shaft, the work implement being coupled to the bell crank, the boom cylinder being coupled to the pair of booms, and the accumulator being communicated with the boom cylinder through an open/close valve, the travel damper control device comprising: a proximity detecting part configured to detect that the bell crank is in proximity to the cross tube when an inner angle formed by the pair of booms and the bell crank becomes less than or equal to a first angle in a side view of the wheel loader and to continuously detect that the bell crank is in proximity to the cross tube while the inner angle is less than or equal to a second angle greater than the first angle after the inner angle becomes less than or equal to the first angled; and a valve switching part configured to switch the open/close valve into a closed position when the proximity detecting part detects that the bell crank is in proximity to the cross tube.