| 摘要 |
A tip for use on an earth working roll for mining, construction and public works machines such as crushers, surface miners, milling machines and the like includes a working end provided with side relief to reduce drag and wearing, require less power to drive the rolls, and lengthen the usable life of the tip. The working end can also have a generally flat front surface to improve the yield in a crushing or other similar operation. The tip includes a base and a wear cap releasably secured together by a retainer. |
| 主权项 |
1. A tip for attachment to a driven roll in an earth working machine, the tip comprising:
a base having a forward facing seat and a mounting end, the mounting end being releasably attached to the roll, the base including a hole, and the seat including (i) a pair of grooves or rails and (ii) a plurality of base stabilizing surfaces separate and spaced from the grooves or rails; a wear cap separable from the base, the wear cap including:
a cavity having a longitudinal axis and opening rearward and receiving the seat and generally corresponding to the shape of the seat;an opening that aligns with the hole in the base; anda wear surface, the wear surface having a front working portion to impact the material when the roll is driven, the front working portion including:
a leading surface facing in the direction the wear cap moves with the roll, the leading surface being inclined forwardly and inwardly at an acute angle relative to the longitudinal axis;a trailing surface opposite the leading surface, and inclined forwardly and inwardly relative to the longitudinal axis; anda front surface inclined rearward from the leading surface in the primary direction of the flow of material and inclined to the longitudinal axis at an acute angle; where an intersection of the front surface and the leading surface defines a foremost impact corner extending transversely to the longitudinal axis for striking the earthen material; and a retainer received into the opening in the wear cap and into the hole in the base to releasable hold the wear cap to the base,wherein the cavity that receives the seat of the base includes:
at least two pairs of opposing surfaces, the at least two pairs of opposing surfaces being generally perpendicular to each other; a rail or groove on each said surface of a first pair of the at least two pairs of opposing surfaces, the rails or grooves of the cavity extending axially through the cavity for receipt within the other of the rails or grooves on the seat of the base, the rails and grooves axially extending generally parallel to the longitudinal axis; and a plurality of cavity stabilizing surfaces separate and spaced from the rails and grooves, one of the cavity stabilizing surfaces being located on each said surface of a second pair of the at least two pairs of opposing surfaces, the cavity stabilizing surfaces being in engagement with the base stabilizing surfaces, each of the stabilizing surfaces of the cavity and the base axially extending substantially parallel to the longitudinal axis to stably support the wear cap on the base to resist loads applied to the wear cap by rotation of the driven roll. |
