US 12,013,014 B2
Friction transmission device
Toshiya Nagumo, Yokosuka (JP)
Assigned to SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Sep. 9, 2022, as Appl. No. 17/931,115.
Application 17/931,115 is a continuation of application No. PCT/JP2021/005066, filed on Feb. 10, 2021.
Claims priority of application No. 2020-043419 (JP), filed on Mar. 12, 2020.
Prior Publication US 2023/0003284 A1, Jan. 5, 2023
Int. Cl. F16H 15/50 (2006.01); F16H 13/08 (2006.01); F16H 57/08 (2006.01)
CPC F16H 13/08 (2013.01) [F16H 57/08 (2013.01); F16H 15/50 (2013.01); F16H 2057/085 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A friction transmission device comprising:
an input raceway ring;
a planetary rolling element that is disposed around a rotation axis of the input raceway ring and comes into contact with the input raceway ring;
an output raceway ring that comes into contact with the planetary rolling element and is connected to an output shaft, the output raceway ring being configured to change a speed of rotation transmitted from the input raceway ring and output the rotation with changed speed; and
a first support raceway ring and a second support raceway ring that come into contact with the planetary rolling element;
a relative position change mechanism that changes relative positions of the input raceway ring, the output raceway ring, the first support raceway ring, and the second support raceway ring,
wherein a quadrangle is formed by extension lines of normal vectors at contact points between the planetary rolling element and the respective raceway rings, and
wherein the relative position change mechanism includes a moving mechanism that integrally moves the input raceway ring and the first support raceway ring in the same axial direction.