US 12,228,200 B2
Coaxial transmission with plain bearing
Heiko Schreiber, Doberschau (DE); Michael Schmidt, Reichenberg (DE); and Thomas Bayer, Igersheim (DE)
Assigned to WITTENSTEIN SE, Igersheim (DE)
Appl. No. 18/030,395
Filed by WITTENSTEIN SE, Igersheim (DE)
PCT Filed Oct. 5, 2021, PCT No. PCT/EP2021/077411
§ 371(c)(1), (2) Date Apr. 5, 2023,
PCT Pub. No. WO2022/073984, PCT Pub. Date Apr. 14, 2022.
Claims priority of application No. 102020126103.9 (DE), filed on Oct. 6, 2020.
Prior Publication US 2023/0375083 A1, Nov. 23, 2023
Int. Cl. F16H 55/08 (2006.01); F16H 1/10 (2006.01); F16H 57/021 (2012.01)
CPC F16H 55/088 (2013.01) [F16H 1/10 (2013.01); F16H 57/021 (2013.01)] 17 Claims
OG exemplary drawing
 
1. Gearbox having
a tooth carrier for receiving teeth of a gear ring that are disposed about a rotation axis of the gearbox, wherein the teeth are disposed in the tooth carrier so as to be displaceable and guided in the radial direction,
a cam disk which is rotatable about the rotation axis and for driving the teeth in the radial direction and which has a cam curvature that is variable over the circumference,
wherein bearing segments which are mounted so as to slide on the cam disk are disposed between the teeth and the cam disk, and
wherein the bearing segments have a contact region which has a concave curvature and is disposed so as to be centric on a running surface that faces the cam disk, wherein the concave curvature is larger than the smallest cam curvature of the cam disk and smaller than the largest cam curvature of the cam disk, and
wherein the cam disk has at least two peaks having a maximum radial spacing from the rotation axis, and at least two troughs which lie in each case between peaks and have a minimal radial spacing from the rotation axis, and wherein the concave curvature is smaller than the smallest cam curvature within an angular range, proceeding from a first one of the peaks, of 5% to 35% of the overall angular range, up to a second one of the peaks.