An excavation system may include a base unit, a boom mounted on the base unit, a pair of drag ropes coupled with the boom, and a robotic bucket mechanism attached to the pair of drag ropes. The robotic bucket mechanism may include an undercarriage drive, a chassis mounted on the undercarriage drive, an excavating bucket mounted on the chassis, a pair of hydraulic lift actuators coupled between the chassis and the excavating bucket at pivot points on both sides of the excavating bucket, and a hydraulic tilt actuator mounted between the chassis and a rear side of the excavating bucket.

An excavation system may include a base unit, a boom mounted on the base unit, a pair of drag ropes coupled with the boom, and a robotic bucket mechanism attached to the pair of drag ropes. The robotic bucket mechanism may include an undercarriage drive, a chassis mounted on the undercarriage drive, an excavating bucket mounted on the chassis, a pair of hydraulic lift actuators coupled between the chassis and the excavating bucket at pivot points on both sides of the excavating bucket, and a hydraulic tilt actuator mounted between the chassis and a rear side of the excavating bucket.

A cam frame assembly for a walking system includes a plurality of frame components. The frame components include an upper frame, a lower frame, a front guide frame, and a rear guide frame. At least one of the frame components includes a replaceable wear surface. The replaceable wear surface is an insert retained within a notch in the frame component.

A pinned connection assembly includes a first rigging component, a second rigging component, a rigging pin, a locking pin, and a lock. The first rigging component has an end with at least one coupling aperture and at least one retention aperture that is transverse to the coupling aperture. The second rigging component has an end with at least one coupling aperture. The rigging pin has an end with a retention groove. The rigging pin is inserted through the coupling apertures of the first and second rigging components. The locking pin has an end with a locking groove. The locking pin is inserted through the retention aperture and the retention groove. The locking groove has guide, transitional, and locking portions for engaging a key of the lock.

A pinned connection assembly includes a first rigging component, a second rigging component, a rigging pin, a locking pin, and a lock. The first rigging component has an end with at least one coupling aperture and at least one retention aperture that is transverse to the coupling aperture. The second rigging component has an end with at least one coupling aperture. The rigging pin has an end with a retention groove. The rigging pin is inserted through the coupling apertures of the first and second rigging components. The locking pin has an end with a locking groove. The locking pin is inserted through the retention aperture and the retention groove. The locking groove has guide, transitional, and locking portions for engaging a key of the lock.

Described are a rear taper dragline bucket having a trunnion, a trunnion system, and a trunnion that permit a rear taper dragline bucket to be operated without a spreader bar while providing reduced wear on the trunnion, trunnion link, and trunnion pin.

Described are a rear taper dragline bucket having a trunnion, a trunnion system, and a trunnion that permit a rear taper dragline bucket to be operated without a spreader bar while providing reduced wear on the trunnion, trunnion link, and trunnion pin.

A dragline bucket includes a base member defining a first end, a second end, and a third end. The dragline bucket also includes a first side wall, a second side wall, and an end wall extending from the base member proximate to the third end of the base member such that the end wall is connected to each of the first side wall and the second side wall. The end wall includes a first portion connected to the base member such that a first angle is defined between the base member and the first portion. The end wall also includes a second portion extending from the first portion. The second portion is substantially perpendicular to the base member. The end wall further includes a third portion extending from the second portion such that a second angle is defined between the second portion and the first portion.

A dragline bucket includes a base member defining a first end, a second end, and a third end. The dragline bucket also includes a first side wall, a second side wall, and an end wall extending from the base member proximate to the third end of the base member such that the end wall is connected to each of the first side wall and the second side wall. The end wall includes a first portion connected to the base member such that a first angle is defined between the base member and the first portion. The end wall also includes a second portion extending from the first portion. The second portion is substantially perpendicular to the base member. The end wall further includes a third portion extending from the second portion such that a second angle is defined between the second portion and the first portion.

A mining machine includes a frame, a boom coupled to the frame, a handle coupled to the frame and a dipper coupled to the handle. The handle includes an extension, and a bail is coupled directly to the extension, such that the bail is isolated from the dipper.