Shaft-hub connection and drive train having a shaft-hub connection of this type

Patent metadata

Field	Value
Publication number	US-11549557-B2
Application number	US-201916560324-A
Country	US
Kind code	B2
Filing date	Sep 4, 2019
Priority date	Mar 8, 2017
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A shaft-hub connection including a hub element and a shaft element is provided. The hub element includes a hub. The shaft element includes at least one first elongated region arranged in at least one second elongated region of the hub and is at least rotationally fixed to the hub element by way of a longitudinal press-fit including the elongated regions. The longitudinal press-fit has at least one first excess region with a first excess, and at least one second excess region, following the first excess region in the circumferential direction of the shaft element, with a second excess that is smaller than the first excess.

First claim

What is claimed is:

1. A shaft-to-hub connection, comprising:
a hub element including a hub; and
a shaft element which includes a longitudinal region which is disposed in a longitudinal region of the hub and which is connected to the hub element at least in a rotationally-fixed manner by way of a longitudinal press-fit that includes the longitudinal region of the shaft element and the longitudinal region of the hub, wherein
the longitudinal press-fit includes:
at least one first excess region formed in the hub and having a first excess;
at least one second excess region formed in the hub and having a second excess that is smaller in relation to the first excess; and
at least one intermediate region in which the shaft element is spaced apart from the hub element in a radial direction of the shaft element,
wherein the at least one first excess region is circumferentially adjacent to the at least one second excess region in a circumferential direction of the shaft element, with the at least one intermediate region disposed between the at least one first excess region and the at least one second excess region in the circumferential direction of the shaft element.

2. The shaft-to-hub connection according to claim 1 , wherein
the longitudinal press-fit further comprises at least one third excess region having a third excess that is different in relation to the second excess, wherein the at least one third excess region is circumferentially adjacent to the at least one second excess region in the circumferential direction of the shaft element.

3. The shaft-to-hub connection according to claim 1 , wherein
the at least one first excess region extends across a first angle in the circumferential direction of the shaft element, and
the at least one second excess region extends across a second angle that differs from the first angle in the circumferential direction of the shaft element.

4. The shaft-to-hub connection according to claim 2 , wherein
the at least one first excess region extends across a first angle in the circumferential direction of the shaft element, and
the at least one second excess region extends across a second angle that differs from the first angle in the circumferential direction of the shaft element.

5. The shaft-to-hub connection according to claim 1 , wherein the shaft element is connected in a rotationally-fixed manner to the hub element exclusively by way of the longitudinal press-fit.

6. The shaft-to-hub connection according to claim 1 , wherein the shaft element is connected in a rotationally-fixed manner to the hub element exclusively by way of the longitudinal press-fit.

7. The shaft-to-hub connection according to claim 1 , wherein the hub element is configured as part of a rotor of an electric machine.

8. The shaft-to-hub connection according to claim 6 , wherein the hub element is configured as part of a rotor of an electric machine.

9. The shaft-to-hub connection according to claim 1 , wherein the shaft element is configured as a shaft of an electric machine.

10. The shaft-to-hub connection according to claim 6 , wherein the shaft element is configured as a shaft of an electric machine.

11. A drive train for a motor vehicle, comprising:
at least one shaft-to-hub connection which comprises a hub element including a hub and a shaft element which has a longitudinal region which is disposed in a longitudinal region of the hub and which is connected to the hub element at least in a rotationally-fixed manner by way of a longitudinal press-fit that includes the longitudinal region of the shaft element and the longitudinal region of the hub, wherein
the longitudinal press-fit includes:
at least one first excess region formed in the hub and having a first excess;
at least one second excess region formed in the hub and having a second excess that is smaller in relation to the first excess; and
at least one intermediate region in which the shaft element is spaced apart from the hub element in a radial direction of the shaft element,
wherein the at least one first excess region is circumferentially adjacent to the at least one second excess region in a circumferential direction of the shaft element, with the at least one intermediate region disposed between the at least one first excess region and the at least one second excess region in the circumferential direction of the shaft element.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Barti Endre
• Ragot Jerome
• Vichos Anastasios

Classifications

• F16D2300/12

  Mounting or assembling · CPC title

• F16D1/0858 Primary

  due to the elasticity of the hub (including shrink fits) · CPC title

• H02K7/003

  Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28) · CPC title

• F16D1/064 Primary

  non-disconnectable · CPC title

• H02K7/006

  Structural association of a motor or generator with the drive train of a motor vehicle · CPC title