Patent ID: 7980501

Claim:
A bucket type jaw crusher for attaching to a hydraulic shovel arm, comprising: stationary jaw teeth fixed to an inner surface of a bottom of a bucket, movable jaw teeth opposing the stationary jaw teeth forming a V shape together with the stationary jaw teeth, a toggle plate supporting a lower portion of the movable jaw teeth, an eccentric main shaft rotatably supporting an upper portion of the movable jaw teeth, a rotational driving means which rotationally drives the eccentric main shaft, and is capable of crushing an object to be crushed with the movable jaw teeth reciprocated via the eccentric main shaft by the rotational driving means and the stationary jaw teeth; said rotational driving means comprising a hydraulic motor connected to one end of the eccentric main shaft and a flywheel connected to the other end of the eccentric main shaft, a counterweight for balance adjustment at an intermediate portion of the eccentric main shaft between said hydraulic motor and said flywheel; a movable jaw teeth side load receiving section of said toggle plate is placed at an upper position than a bucket side load receiving section of said toggle plate; and while the movable jaw teeth are reciprocated by the rotation of said eccentric main shaft, said object to be crushed is pressed against the stationary jaw teeth by the movable jaw teeth via the rocking motion of said toggle plate.