US RE50,673 E1
Actuator for shift-by-wire system
Yang Rae Cho, Suwon-si (KR); Byoung Hyuk Lee, Suwon-si (KR); Wonjin Jeong, Hwaseong-si (KR); Kyu-Jung Kim, Daegu (KR); Ki Cheol Hyun, Daegu (KR); and Dae Yeon Kim, Daegu (KR)
Assigned to Hyundai Motor Company, Seoul (KR); Kia Motors Corporation, Seoul (KR); and Kyung Chang Industrial Co., Ltd., Daegu (KR)
Filed by Hyundai Motor Company, Seoul (KR); Kia Motors Corporation, Seoul (KR); and Kyung Chang Industrial Co., Ltd., Daegu (KR)
Filed on Feb. 22, 2024, as Appl. No. 18/584,507.
Application 18/584,507 is a reissue of application No. 16/890,426, filed on Jun. 2, 2020, granted, now 11,255,431, issued on Feb. 22, 2022.
Claims priority of application No. 10-2019-0165421 (KR), filed on Dec. 12, 2019.
Int. Cl. F16H 63/30 (2006.01); F16H 1/32 (2006.01); F16H 57/021 (2012.01); F16H 57/04 (2010.01); F16H 57/08 (2006.01); F16H 61/32 (2006.01)
CPC F16H 63/304 (2013.01) [F16H 1/32 (2013.01); F16H 57/021 (2013.01); F16H 57/0479 (2013.01); F16H 57/08 (2013.01); F16H 2001/327 (2013.01); F16H 2057/085 (2013.01); F16H 2061/323 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An actuator for a shift-by-wire system comprising:
a drive motor installed inside a motor housing, the drive motor having [ comprising:
a rotor, and]
a drive shaft [ comprising a driving part having a central axis of rotation, an eccentric part and an elongated part,
wherein the driving part is fixed to the rotor,
wherein the eccentric part is integrally connected to the driving part at a position off the central axis of rotation, and
wherein the elongated part is elongated with respect to the central axis of rotation from the eccentric part] ; and
a decelerator inside a decelerator housing coupled with the motor housing, the decelerator eccentrically coupled to the drive shaft , the decelerator [ and ] including:
a sun gear rotatably connected to a first side of an [ the ] eccentric part of the drive shaft;
a ring gear engaged with the sun gear and fixed to the decelerator housing;
an output shaft rotatably connected to a second side of the eccentric part [ the elongated part] , wherein the output shaft integrally forms a flange part orthogonal to a shaft direction;
a first bearing coupled to one side of the eccentric part and supporting the sun gear;
a second bearing coupled to another side of the eccentric part [ the elongated part ] and supporting the output shaft; and
a power delivery unit coupled to the sun gear and the output shaft in a center region between the first bearing and the second bearing, wherein the power delivery unit includes radial groove parts radially formed [ arranged ] along a radial direction at an edge part of one surface of the sun gear corresponding to the output shaft and radial protrusions formed to be protruded [ protruding ] along a radial direction at an edge part of the flange part of the output shaft and coupled to the radial groove parts with a predetermined gap [ , ] and wherein the sun gear further includes a supporting part connected to the radial groove parts and supporting the flange part of the output shaft [ ; and
a lubricant filled part filled with a lubricant and arranged between the flange part and the supporting part,
wherein the sun gear further includes crown parts arranged between the radial groove parts,
wherein a lubricant flow groove connected with the lubricant filled part is arranged in the crown parts and sealed by a cover part of the output shaft,
wherein the lubricant flow groove is arranged on upper surfaces of the crown parts along a rotational direction of the sun gear, and
wherein, during a phase movement of the sun gear, the lubricant filled in the lubricant filled part is circulatable through the lubricant flow groove to an adjacent radial groove part] .