US 12,455,000 B2
Driving unit of steering apparatus
Bong Sung Ko, Yongin-si (KR); and Kyeongho Lee, Seoul (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek-si (KR)
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
Filed on May 4, 2022, as Appl. No. 17/736,542.
Claims priority of application No. 10-2021-0067288 (KR), filed on May 25, 2021.
Prior Publication US 2022/0379952 A1, Dec. 1, 2022
Int. Cl. F16H 57/021 (2012.01); B62D 5/04 (2006.01)
CPC F16H 57/021 (2013.01) [B62D 5/0454 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A driving unit of a steering apparatus configured to provide an auxiliary torque of a steering apparatus and including a driving unit housing having an installation region formed therein, the driving unit comprising:
a worm shaft disposed in the installation region and having a worm gear formed therein;
a first bearing rotatably supporting one side of the worm shaft;
a damper having a damper support through hole into which the one side of the worm shaft supported by the first bearing is inserted; and
a stopper having a stopper through hole into which the one side of the worm shaft passing through the damper is inserted, one end of the stopper being spaced apart from the damper so that a movement of the damper is limited in an axial direction of the worm shaft,
wherein the damper includes:
a first damper support supporting a side surface of the bearing and having the damper support through hole; and
a buffer section disposed between the first damper support and the stopper to relieve an impact of the worm shaft in the axial direction and having a buffer section through hole into which the one side of the worm shaft is inserted, and
wherein the stopper includes:
an annular body formed in an annular shape and having the stopper through hole; and
a protrusion having one end disposed to be spaced apart from the first damper support and extending from the annular body toward the bearing, wherein the protrusion surrounds a region of an outer peripheral surface of the buffer section, and a plurality of the protrusions are formed on the annular body.