Electric machine having a housing in the form of a drive bearing and having an internal gear mounted therein

Patent metadata

Field	Value
Publication number	US-9982648-B2
Application number	US-201514840637-A
Country	US
Kind code	B2
Filing date	Aug 31, 2015
Priority date	Aug 29, 2014
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

An electric machine having a housing part which is in the form of a drive bearing ( 19 ), having an electric motor ( 13 ) as a drive, having a planetary gearing ( 153 ) and having a drive element ( 22 ), wherein the planetary gearing ( 153 ) has a planet gear ( 16 ) which meshes with an internal gear ( 73 ), and a gear carrier ( 95 ) which is coupled to the drive element ( 22 ) can be driven by means of the planet gear ( 160 ), wherein the internal gear ( 73 ) is mounted in damped fashion at least indirectly against the housing part, wherein the internal gear ( 73 ) has an engagement element and the housing part has an engagement element, and the two engagement elements engage into one another in alternating fashion, wherein a damping element is arranged between the two engagement elements in a circumferential direction.

First claim

What is claimed is:

1. An electric machine comprising a housing part which is in the form of a drive bearing ( 19 ), an electric motor ( 13 ) as a drive, a planetary gearing ( 153 ), and a drive element ( 22 ), wherein the planetary gearing ( 153 ) has at least one planet gear ( 160 ) which meshes with an internal gear ( 73 ) and a gear carrier ( 95 ) that is coupled to the drive element ( 22 ) and that is configured to be driven by the at least one planet gear ( 160 ), wherein the internal gear ( 73 ) is mounted in damped fashion at least indirectly against the housing part, wherein the internal gear ( 73 ) has at least one engagement element and the housing part has at least one engagement element, and the at least two engagement elements engage into one another in alternating fashion, and the electric machine further comprising a damping element ( 165 ) is arranged between the at least two engagement elements in a circumferential direction; and
wherein an intermediate bearing carrier ( 98 ) is arranged between the separate internal gear ( 73 ) and the drive element ( 22 ), and the intermediate bearing carrier ( 98 ) is mounted in the housing part, wherein the intermediate bearing carrier ( 98 ) has at least one engagement element, and wherein the at least two engagement elements of the intermediate bearing carrier ( 98 ) and the housing part engage into one another in alternating fashion.

2. The electric machine according to claim 1 , wherein the at least one engagement element of the internal gear ( 73 ) is a peg ( 163 ) and the at least one engagement element of the drive bearing ( 19 ) is an intermediate space ( 147 ).

3. The electric machine according to claim 1 , wherein the at least one engagement element of the internal gear ( 73 ) is a groove ( 203 ) and the at least one engagement element of the drive bearing is a peg ( 206 ).

4. The electric machine according to claim 1 , wherein the at least one engagement element of the internal gear ( 73 ) and the at least one engagement element of the intermediate bearing carrier ( 98 ) alternate in the inner circumferential position of the housing, wherein, between the engagement element of the internal gear ( 73 ) and the engagement element of the intermediate bearing carrier ( 98 ), there is arranged the at least one damping element ( 165 ) and at least one web ( 145 ) which is integrally connected to the housing.

5. The electric machine according to claim 1 , wherein the engagement element of the internal gear ( 73 ) and the engagement element of the intermediate bearing carrier ( 98 ) are arranged at the same circumferential position of the housing part, wherein the damping element ( 165 ) is arranged between the engagement element of the internal gear ( 73 ) and the engagement element of the intermediate bearing carrier ( 98 ).

6. The electric machine according to claim 5 , wherein, in an intermediate space ( 147 ) in the housing part, the damping element ( 165 ) is delimited in one axial direction by a web ( 132 ) of the intermediate bearing carrier ( 98 ) and in another axial direction by a web ( 180 ) of a cover.

7. The electric machine according to claim 1 , wherein a web ( 145 ) on the inner circumference of the housing part is connected in electrically conductive fashion to a component of the electric motor ( 13 ).

8. The electric machine according to claim 5 , wherein, in an intermediate space ( 147 ) in the housing part, the damping element ( 165 ) is delimited in one axial direction by a web ( 132 ) of the intermediate bearing carrier ( 98 ) and in another axial direction by a web ( 180 ) of a cover, wherein the cover is formed as a further intermediate bearing carrier ( 68 ) and serves for mounting a rotor shaft ( 84 ) of the electric motor ( 13 ).

9. The electric machine according to claim 1 , wherein a web ( 145 ) on the inner circumference of the housing part is connected in electrically conductive fashion to a pole tube ( 18 ) of the electric motor ( 13 ).

10. The electric machine according to claim 1 , wherein a web ( 145 ) on the inner circumference of the housing part is connected in electrically conductive fashion to a pole tube ( 18 ) of the electric motor ( 13 ) by abutment at a face side.

11. The electric machine according to claim 1 , wherein the engagement element of the internal gear is a recess ( 147 , 203 ) and the engagement element of the housing is a radial projection ( 163 , 206 ), and wherein the damping element ( 165 ) surrounds the radial projection ( 163 , 206 ) and is seated in the recess ( 147 , 203 ).

12. The electric machine according to claim 11 , wherein the recess ( 147 ) is between a first web ( 145 ) and a second web ( 145 ), wherein the first web ( 145 ) and the second web ( 145 ) are each integrally connected to the housing part and are circumferentially separated from each other, wherein the radial projection ( 163 ) radially projects into the recess ( 147 ) from the internal gear ( 73 ), and wherein the damping element ( 165 ) is between the radial projection ( 163 ) and the first web ( 145 ) and further between the radial projection ( 163 ) and the second web ( 145 ).

13. The electric machine according to claim 2 , wherein the intermediate space ( 147 ) is between a first web ( 145 ) and a second web ( 145 ), wherein the first web ( 145 ) and the second web ( 145 ) are each integrally connected to the housing part and are circumferentially separated from each other, wherein the peg ( 163 ) radially projects into the intermediate space ( 147 ) from the internal gear ( 73 ), and wherein the damping element ( 165 ) is between the peg ( 163 ) and the first web ( 145 ) and further between the peg ( 163 ) and the second web ( 145 ).

14. The electric machine according to claim 2 , wherein the damping element ( 165 ) surrounds the peg ( 163 ) and is seated in the intermediate space ( 147 ).

15. The electric machine according to claim 3 , wherein the damping element ( 165 ) surrounds the peg ( 206 ) and is seated in the groove ( 203 ).

16. The electric machine according to claim 2 , wherein a first intermediate bearing carrier ( 98 ) is arranged between the internal gear ( 73 ) and the drive element ( 22 ) and is mounted in the housing part, wherein the first intermediate bearing carrier ( 98 ) has at least one web ( 132 ), wherein a second intermediate bearing carrier ( 68 ) is arranged between the internal gear ( 73 ) and the electric motor ( 13 ) and is mounted at least partially in the housing part, wherein the second intermediate bearing carrier ( 68 ) has at least one web ( 180 ), and wherein the peg ( 163 ), the damping element ( 165 ), the web ( 132 ) of the first intermediate bearing carrier ( 98 ), and the web ( 180 ) of the second intermediate bearing ( 68 ) are seated in the recess ( 147 ) and are axially aligned.

17. The electric machine according to claim 16 , wherein the damping element ( 165 ) surrounds the peg ( 163 ) such that the damping element ( 165 ) is between the peg ( 163 ) and the web ( 132 ) of the first intermediate bearing carrier ( 98 ) and further between the peg ( 163 ) and the web ( 180 ) of the second intermediate bearing carrier ( 68 ), and wherein the web ( 132 ) of the first intermediate bearing carrier ( 98 ) and the web ( 180 ) of the second intermediate bearing carrier ( 98 ) are separated in an axial direction.

18. The electric machine according to claim 17 , wherein the damping element ( 165 ) is between the peg ( 163 ) and a first web ( 145 ) integrally connected to the housing and further between the peg ( 163 ) and a second web ( 145 ) int

Assignees

• Bosch Gmbh Robert

Inventors

• Bauer Bernhard
• Reschnar Frank
• Erlenmaier Stefan
• Foell Mike
• Caro Jean-Philipp

Classifications

• F02N15/046 Primary

  of the planetary type · CPC title

• F02N15/067

  the starter comprising an electro-magnetically actuated lever · CPC title

• F02N15/063

  with resilient shock absorbers · CPC title

• F02N15/006

  Assembling or mounting of starting devices · CPC title

• F02N11/00

  Starting of engines by means of electric motors · CPC title