| 摘要 |
A hydraulic driven turning device to be installed to a construction machine has a first body and a second body turning in relation to the first body, and a hydraulic cylinder attached from the first and second bodies to another body. A piston is axially movable via a hydraulic pressure medium, and a spiral part is attached to the piston. The spiral part causes a rotational movement to a counter part equipped with a spiral, whereupon the rotational movement can be transferred to be a turning movement of another body. The piston is arranged to be non-rotating in the cylinder by forming the cross section of the piston and the cylinder to be deviant from a round form, such as having an oval or angular shape, or by adjusting the piston to be eccentric in relation to a bearing axis thereof. |
| 主权项 |
1. A hydraulic driven turning device to be installed to a construction machine, comprising
a first body, a second body turning in relation to the first body, a hydraulic cylinder attached from the first body and the second body to another body, a piston that is axially movable back and forth in the hydraulic cylinder via a hydraulic pressure medium, and a spiral part that is attached to the piston, the spiral part causing a rotational movement that can be transferred to be a turning movement of the another body, the piston being arranged to be non-rotating in the hydraulic cylinder by forming a cross section of the piston and the hydraulic cylinder to be deviant from a round form, and the hydraulic cylinder only having a part L2 in relation to the spiral part that is deviant from the round form or is eccentric located regarding a cross section thereof, the part L2 being the course of the piston. |
