Patent ID: 8670906

Claim:
An overturn preventing device for a dump vehicle equipped with a body rotatably supported on a frame, rear wheels, and hoist cylinders that expand and contract to rotate the body around a rotation axis aligned substantially parallel with a rear-wheel axle, the device comprising: loaded weight estimation means which estimates loaded weight on the body; vehicle rotation moment calculation means which calculates a vehicle rotation moment about the rotation axis caused by movement of a dump vehicle's load upon discharging of the load based on the loaded weight estimated by the loaded weight estimation means; reference moment calculation means which calculates a minimum value of a rotation moment required to lift front wheels of the vehicle off the ground and sets a reference moment not greater than the minimum value; judgment means which judges whether or not the vehicle rotation moment calculated by the vehicle rotation moment calculation means has exceeded the reference moment calculated by the reference moment calculation means; and notification means which notifies a driver that there is a probability of an overturn of the vehicle when the judgment means judges that the vehicle rotation moment has exceeded the reference moment.