A dipper door trip assembly includes a dipper, a dipper door pivotally coupled to the dipper, a linkage assembly including a sliding latch bar disposed at least partially in the dipper door, and a latch keeper coupled to the dipper. The latch keeper includes a roller that engages and disengages the latch bar.

A dipper door trip assembly includes a dipper, a dipper door pivotally coupled to the dipper, a linkage assembly including a sliding latch bar disposed at least partially in the dipper door, and a latch keeper coupled to the dipper. The latch keeper includes a roller that engages and disengages the latch bar.

A rock breaking device, including: a large arm, including a first large arm end, a second large arm end and a first hinge part; a small arm, including a first small arm end, a second small arm end and a second hinge part; a scarifier, including a third hinge part and being divided into a first scarifying part that is close to a tip of the scarifier and a second scarifying part that is connected to the first scarifying part; a first hydraulic cylinder; and a second hydraulic cylinder; a first large arm end is configured to connect to a carrier, while a second large arm end is hinged with the second hinge part; an end of the first hydraulic cylinder is hinged with the first hinge part, and another end of the first hydraulic cylinder is hinged with a first small arm end, while a second small arm end is hinged with the third hinge part; an end of the second hydraulic cylinder is hinged with the small arm, and another end of the second hydraulic cylinder is hinged with the second scarifying part, the weight of the scarifier accounting for 30%-70% of the total weight of the rock breaking device. Further provided is a construction machinery including the rock breaking device.

A dipper door trip assembly includes a dipper, a dipper door pivotally coupled to the dipper, a linkage assembly including a sliding latch bar disposed at least partially in the dipper door, and a latch keeper coupled to the dipper. The latch keeper includes a roller that engages and disengages the latch bar.

A dipper door trip assembly includes a dipper, a dipper door pivotally coupled to the dipper, a linkage assembly including a sliding latch bar disposed at least partially in the dipper door, and a latch keeper coupled to the dipper. The latch keeper includes a roller that engages and disengages the latch bar.

A ground engaging tool locking system includes a pin having a first, proximal head region and a second, distal end region spaced from the first, proximal head region along an axis. The pin includes a groove located between the first, proximal head region and the second, distal end region. A biasing element is disposed at least partially within the groove.

A mining machine assembly includes a dipper having a main body, the main body having a front side, a back side, a bottom side, and a top side. A ground engagement portion extends from the front side, the ground engagement portion including digging teeth. The mining machine assembly also includes a hoist rope attachment assembly coupled to the dipper. The hoist rope attachment assembly is configured to directly couple a hoist rope to the dipper. The hoist rope attachment assembly includes a cam having a first portion extending from the top side of the main body of the dipper, and a second portion that extends from the first portion and away from the main body and digging teeth.

A mining machine assembly includes a dipper having a main body, the main body having a front side, a back side, a bottom side, and a top side. A ground engagement portion extends from the front side, the ground engagement portion including digging teeth. The mining machine assembly also includes a hoist rope attachment assembly coupled to the dipper. The hoist rope attachment assembly is configured to directly couple a hoist rope to the dipper. The hoist rope attachment assembly includes a cam having a first portion extending from the top side of the main body of the dipper, and a second portion that extends from the first portion and away from the main body and digging teeth.

A method of determining payload data of a mining machine having a bucket and a handle. The bucket and handle are rotatably coupled via a pin and an actuator. The method includes sensing, via a sensor, a force associated with the actuator, determining, via a controller, a characteristic indicative of a rotational angle of the bucket, and determining, via the controller, payload data based on the force and the characteristic.

A method of determining payload data of a mining machine having a bucket and a handle. The bucket and handle are rotatably coupled via a pin and an actuator. The method includes sensing, via a sensor, a force associated with the actuator, determining, via a controller, a characteristic indicative of a rotational angle of the bucket, and determining, via the controller, payload data based on the force and the characteristic.