Dipper door and dipper door trip assembly
AssigneeHarnischfeger Technologies, Inc.
InventorsMatthew L. Gross, Joseph J. Colwell, Richard Nicoson
Life of this patent
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Abstract
A mining machine includes a boom, a handle coupled to the boom, a dipper coupled to the handle, and a dipper door pivotally coupled to the dipper. The mining shovel also includes a dipper door trip assembly including a trip motor coupled to the boom, a trip drum coupled to the handle, a linkage assembly coupled to the dipper door, a first actuation element extending directly from the trip motor to the trip drum, and a second actuation element extending directly from the trip drum to the linkage assembly.
Claims20
A mining machine comprising:
- a boom;
- a handle coupled to the boom;
- a dipper coupled to the handle;
- a dipper door pivotally coupled to the dipper;
- and
- a dipper door trip assembly including a trip motor coupled to the boom, a trip drum coupled to the handle, a linkage assembly coupled to the dipper door, a first actuation element extending directly from the trip motor to the trip drum, and a second actuation element extending directly from the trip drum to the linkage assembly.
A dipper door trip assembly comprising:
- a trip motor;
- an actuation element coupled to the trip motor;
- and
- a linkage assembly coupled to the actuation element, wherein the linkage assembly includes a lever arm coupled to the actuation element, a rod coupled to the lever arm about a first joint, a latch lever bar coupled to the rod about a second joint, and a latch bar coupled to the latch lever bar, wherein activation of the trip motor causes linear movement of the latch bar and latch bar insert, and wherein the first and second joints permit the rod to move in multiple degrees of freedom.
A dipper door comprising:
- a bottom panel having a plurality of openings that open to an interior cavity inside the dipper door;
- a top panel disposed opposite the bottom panel;
- and
- a plurality of ribs extending between the bottom panel and the top panel.
Dependencies are inferred from the claim text.