Hydraulic driven turning device

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
• a part L2 of the hydraulic cylinder that differs from the round form regarding the cross section being located in a middle portion of the hydraulic cylinder with respect to a longitudinal direction of the hydraulic cylinder.

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
• a separate piece being attached to one or both end surfaces of the hydraulic cylinder, with an inner hole of the separate piece being round.

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
• a modification piece that is attached to one or both ends of the hydraulic cylinder onto an inner surface thereof, the modification piece being configured such that the inner surface of the cylinder that deviates from the round form is modified to be round.

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 spiral part being configured as a first spiral part and a second spiral part, each of which is attached to a piston rod at opposed ends thereof.