| 摘要 |
<p>CONVEYOR FOLDING AND MOLDBOARD OPERATION FOR EXCAVATING AND LOADING SYSTEMS The present invention relates to an excavating wheel. The wheel is comprised of a pair of spaced apart side plates each extending radially outwardly with respect to a central axis of rotation. A plurality of stationary walls each extend between the side walls and each have outwardly projecting material cutters. A plurality of movable walls each extend between the side walls and cooperate with one of the stationary walls to define a digging bucket. The walls thereby define a plurality of digging buckets positioned immediately adjacent one another to define the entire periphery of the excavating wheel. Each of the movable walls are supported for pivotal movement between a material receiving position and a material dumping position. A unit is provided which is entirely enclosed and which is responsive to the rotation of the wheel for positively pivoting the movable wall of each digging bucket to the material receiving position during one portion of the rotation and for positively pivoting the movable wall of each digging bucket to the material dumping position during another portion of the rotation. The unit is comprised of a plurality of push rods each connected at one end to the movable wall of one of the buckets, a collar connected to the ends of the push rods remote from the movable wall, and a unit for constraining the push rods to rotation with the buckets. A support is provided for rotatably supporting the collar at a point offset from the axis of rotation of the buckets and thereby actuating the push rods to pivot the movable walls to the material dumping position when their respective buckets are positioned over the material receiving portion of a conveyor.</p> |
