POWER TRANSMITTING DEVICE FOR TRANSMITTING EXTERNAL FORCE INTO ROTATING BODY, AND ORBITAL PIPE CUTTING DEVICE AND HYDRAULIC CHUCKING DEVICE ABLE TO FREELY CONTROL CUTTING TOOL MOVEMENT INSIDE ROTATING BODY BY USING THE POWER TRANSMITTING DEVICE

摘要

Disclosed are a power transfer device for transferring external power to a rotary body, a pipe cutting device using the power transfer device and a hydraulic chucking device using the power transfer device. The power transfer device is configured to transfer external power to a rotary body coupled to one side of a main body. The power transfer device includes at least one double-action interlocking cylinder mounted to a rear surface of the rotary body and provided with a rod protruding toward the main body, a push unit installed in the main body and provided with at least one pusher protruding toward the rotary body, and a bearing disposed between the pusher of the push unit and the rod of the interlocking cylinder and configured to allow relative rotation of the pusher and the rod and to transfer power between the pusher and the rod.