ACCELERATION CONTROL DEVICE FOR A HYDRAULIC DRIVE UNIT

摘要

An acceleration control device for a hydraulic drive unit having a rotatable control shaft movable between an on position and an off position. An arm is connected to the control shaft for rotating the shaft between the off and on positions. A motive apparatus is movable between a first position which corresponds to the off position of the control shaft and a second position which corresponds to the on position of the control shaft. A mechanical linkage is connected between the motive apparatus and the arm. The linkage imparts movement to the arm in response to movement of the motive apparatus to cause the control shaft to move between the off and on positions as the motive apparatus moves between the first and second positions, respectively. The linkage is configured to provide a substantially nonlinear relationship between the speed of the arm and the speed of the motive apparatus. The linkage is further configured so that the speed of the arm is at a minimum in relation to the speed of the motive apparatus when the control shaft is immediately adjacent its off position. The speed of the arm increases in relation to the speed of the motive means as the control shaft is moved away from its off position.