Dump vehicle overturn preventing device
First Claim
1. An overturn preventing method for a dump vehicle equipped with a body rotatably supported on a frame, and hoist cylinders that expand and contract to rotate the body around a rotation axis, the method comprising the steps of:
- calculating, by a hoist cylinder controller, an overturn threshold moment required to lift front wheels of the dump vehicle off a ground;
determining, by the hoist cylinder controller, a probability of an overturn of the dump vehicle on a basis of the overturn threshold moment; and
preventing, by the hoist cylinder controller, the overturn of the dump vehicle upon discharging of loads from the dump vehicle by tilting the body based on the probability.
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Accused Products
Abstract
A dump vehicle overturn preventing device includes: a loaded weight estimation unit which estimates loaded weight on the body; a vehicle rotation moment calculation unit which calculates a vehicle rotation moment Mb caused by movement of the dump vehicle'"'"'s load upon discharging of the load; a reference moment calculation unit which determines a reference moment Ms not greater than an overturn threshold moment MI which is the minimum value of a rotation moment required to lift the front wheels off the ground; a judgment unit which judges whether or not the vehicle rotation moment Mb has exceeded the reference moment Ms; and a display device which notifies the driver that there is a probability of an overturn of the vehicle when the vehicle rotation moment Mb is judged to have exceeded the reference moment Ms.
4 Citations
9 Claims
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1. An overturn preventing method for a dump vehicle equipped with a body rotatably supported on a frame, and hoist cylinders that expand and contract to rotate the body around a rotation axis, the method comprising the steps of:
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calculating, by a hoist cylinder controller, an overturn threshold moment required to lift front wheels of the dump vehicle off a ground; determining, by the hoist cylinder controller, a probability of an overturn of the dump vehicle on a basis of the overturn threshold moment; and preventing, by the hoist cylinder controller, the overturn of the dump vehicle upon discharging of loads from the dump vehicle by tilting the body based on the probability. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An overturn preventing method for a dump vehicle equipped with a body rotatably supported on a frame, and hoist cylinders that expand and contract to rotate the body around a rotational axis, the method comprising the steps of:
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calculating, by a hoist cylinder controller, a withstand load of a shoulder of a road where the dump vehicle is on based on an internal frictional angle of the shoulder and a shape of the shoulder; calculating, by the hoist cylinder controller, a load on the body acting on the shoulder via rear wheels of the dump vehicle; determined, by the cylinder controller, a probability of a collapse of the shoulder on a basis of the withstand load on the body of the shoulder and the load acting on the shoulder via the rear wheels; and preventing, by hoist cylinder controller, the overturn of the dump vehicle upon discharging of loads from the dump vehicle by tilting the body based on the probability. - View Dependent Claims (9)
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Specification