US 12,146,558 B2
Plate-shaped harmonic reducer
Jaeheung Park, Gyeonggi-do (KR); and Seung Bin You, Gyeonggi-do (KR)
Assigned to SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul (KR)
Appl. No. 17/797,394
Filed by SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul (KR)
PCT Filed Feb. 9, 2021, PCT No. PCT/KR2021/001741
§ 371(c)(1), (2) Date Aug. 3, 2022,
PCT Pub. No. WO2021/162430, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 10-2020-0016640 (KR), filed on Feb. 11, 2020.
Prior Publication US 2023/0088852 A1, Mar. 23, 2023
Int. Cl. F16H 49/00 (2006.01); F16H 1/32 (2006.01)
CPC F16H 49/001 (2013.01) [F16H 1/32 (2013.01); F16H 2049/003 (2013.01); F16H 2049/006 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A plate harmonic reducer comprising:
a circular spline member of a disc shape having a certain radius with a first central axis;
a flex spline member of a disc shape having a certain radius with a second central axis and made of an elastic material; and
a wave generator member having a third central axis, wherein
the flex spline member is positioned on the circular spline member, and
the wave generator member is positioned on the flex spline member, and
the first central axis, the second central axis, and the third central axis are positioned on the same line, and
the circular spline member comprises a first toothed gear portion, and
the first toothed gear portion is formed on a top surface of the circular spline member and is formed along an outer circumference of the circular spline member, and
the flex spline member comprises a second toothed gear portion, and
the second toothed gear portion is formed on a bottom surface of the flex spline member and is formed along an outer circumference of the flex spline member, and
the first toothed gear portion and the second toothed gear portion are positioned to overlap in a vertical direction, and
the wave generator member
presses at least part of the flex spline member so that at least part of the first toothed gear portion and at least part of the second toothed gear portion are engaged with each other, and
when the wave generator member rotates around the third central axis, portions where the first toothed gear portion and the second toothed gear portion are engaged with each other, vary, and
a number of toothed gears of the first toothed gear portion is different from a number of toothed gears of the second toothed gear portion;
wherein the circular spline member has a first inclined surface on the top surface thereof, the first inclined surface having a flat surface inclined downwardly toward an outside in a radial direction with the first central axis as a center;
wherein the flex spline member has a (2-1)-th inclined surface on the bottom surface thereof, the (2-1)-th inclined surface having a flat surface inclined downwardly toward an outside in a radial direction with the second central axis as a center; and
wherein an inclination angle of the first inclined surface is greater than an inclination angle of the (2-1)-th inclined surface.