TORQUE TRANSMISSION DEVICE

WIPO Patent Application WO/2020/209434

A1

A torque transmission device is disclosed. The disclosure comprises: a rotating body connected to a shaft of a power generating unit; and a rotated body coupled to the rotating body in an attachable/detachable manner, a rotated member being coupled to the outer peripheral surface of the rotated body. The rotating body is coupled to the shaft of the power generating unit, has a through-hole formed at the center thereof, and has multiple incisions formed radially and connected to the through-hole. The rotating body comprises multiple engaging members formed to protrude from the upper portion thereof, each engaging member having a stepped portion formed on the outer surface thereof. The rotated body has a coupling hole formed therein such that the multiple engaging members are fitted and coupled thereto. Multiple fitting grooves are formed on the inner peripheral surface of the engaging hole so as to correspond to the stepped portions. Accordingly, the present invention is advantageous in that same can receive power transmitted from a motor rotating shaft and rotate thereby, thereby stably supporting the rotation of a polishing material such as a polishing disc; same can provide a locking function such that the polishing member is not detached during a high-speed rotation; and same can prevent inverse rotations thereof.

JPH0685705	[Name of invention ] A drill chuck that can be attached to and detached from a disc grinder.
JPS61257755	AIR-DRIVEN GRINDER

KIM DA HYE (KR)

PCT/KR2019/004923

October 15, 2020

April 23, 2019

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KIM DA HYE (KR)

B24B23/02; B24B45/00

KR101949158B1	2019-02-19
KR101855860B1	2018-05-23
KR101773447B1	2017-08-31
JPS6232768Y2	1987-08-21
US20100018736A1	2010-01-28

LEE, Sang-Pil (KR)

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