US 11,946,510 B2
Shaft assembly
Benjamin Dönges, Dortmund (DE); Stefan Buchkremer, Cologne (DE); Maximilian Rolfes, Sundern (DE); and Vladimir Kobelev, Attendorn (DE)
Assigned to Muhr und Bender KG, Attendorn (DE)
Appl. No. 17/276,853
Filed by Muhr und Bender KG, Attendorn (DE)
PCT Filed Sep. 13, 2019, PCT No. PCT/EP2019/074501
§ 371(c)(1), (2) Date Mar. 17, 2021,
PCT Pub. No. WO2020/058122, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 102018122977.1 (DE), filed on Sep. 19, 2018.
Prior Publication US 2022/0034367 A1, Feb. 3, 2022
Int. Cl. F16D 1/072 (2006.01); F16D 1/08 (2006.01); F16D 1/10 (2006.01); F16D 1/12 (2006.01)
CPC F16D 1/072 (2013.01) [F16D 1/0805 (2013.01); F16D 1/10 (2013.01); F16D 1/12 (2013.01); F16D 2001/102 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A shaft assembly, comprising:
a hollow shaft with an axis of rotation; and
a hub body which is connected to the hollow shaft in a force locking manner;
wherein the hollow shaft, viewed in cross-section, includes a circumferentially closed wall with a plurality of circumferentially distributed support portions that are in abutting contact with the hub body, and with spring portions spaced from an inner circumferential face of the hub body;
wherein inner surface regions of the spring portions lie on a smaller radius around the axis of rotation than inner surface regions of the support portions; and
wherein the hollow shaft is configured so as to have a radial spring travel for which the following applies:

OG Complex Work Unit Math
wherein:
s3 is the radial spring travel,
R3max is a maximum radius of the shaft in an unmounted condition,
R3min is a maximum radius of the shaft in a maximum radial-elastic deflected state,
D3a is twice a maximum radius of the shaft in the unmounted condition,
E is a modulus of elasticity of the shaft,
A is a cross-sectional area of the shaft,
μ is a transverse contraction coefficient of the shaft, and
Rp0,2 is a yield strength of the shaft material.