Spindle drive, and comfort drive having a spindle drive

Patent metadata

Field	Value
Publication number	US-11305672-B2
Application number	US-201916356523-A
Country	US
Kind code	B2
Filing date	Mar 18, 2019
Priority date	Mar 20, 2018
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

A spindle drive (10), having a gear housing (15) which is connected to a drive motor (12), the gear housing (15) having a housing main body (16; 16a) and at least one housing cover (18; 18a, 20; 20a) which is connected to the housing main body (16; 16a), the housing main body (16; 16a) and the at least one housing cover (18; 18a, 20; 20a) delimiting a receiving space (24) for a drive element (25) which interacts with the drive motor (12), the drive element (25) being connected to a spindle (28) which penetrates the receiving space (24), means (37) being provided, in particular in the form of a shaft ring, for arranging the drive element (25) in the receiving space (24) in a manner which is free from axial play, and the means being arranged in a receiving region (39) in the receiving space (24).

First claim

What is claimed is:

1. A spindle drive ( 10 ) comprising
a gear housing ( 15 ) which is connected to a drive motor ( 12 ), the gear housing ( 15 ) having a housing main body ( 16 ; 16 a ) and a housing cover ( 18 ; 18 a , 20 ; 20 a ) which is connected to the housing main body ( 16 ; 16 a ), the housing main body ( 16 ; 16 a ) and the housing cover ( 18 ; 18 a , 20 ; 20 a ) delimiting a receiving space ( 24 ) for a drive element ( 25 ) which interacts with the drive motor ( 12 ), the drive element ( 25 ) being connected to a spindle ( 28 ) which penetrates the receiving space ( 24 ), and
means ( 37 ) for arranging the drive element ( 25 ) in the receiving space ( 24 ) in a manner which is free from axial play, the means ( 37 ) being arranged in a receiving region ( 39 ) in the receiving space ( 24 ),
wherein means for adjusting the size of the receiving region ( 39 ) are configured to, via a threaded connection ( 45 ; 45 a ) with the housing cover ( 18 ), set and adjust the size of the receiving region ( 39 ) along a direction that runs coaxially with respect to a rotational axis ( 32 ) of the spindle ( 28 ).

2. The spindle drive according to claim 1 , characterized in that the threaded connection ( 45 ) comprises an external thread ( 46 ) on the housing cover ( 18 ) and an internal thread ( 43 ) on an inner wall ( 42 ) of the housing main body ( 16 ), wherein a centerline of the threaded connection ( 45 ; 45 a ) is collinear with the rotational axis ( 32 ) of the spindle ( 28 ).

3. The spindle drive according to claim 2 , characterized in that the internal thread ( 43 ) extends over an entire height of the main housing body ( 16 ), wherein the height runs in a direction of the rotational axis ( 32 ) of the spindle ( 28 ), and in that the housing cover ( 18 ) is a first housing cover, and wherein a second housing cover ( 18 ) is provided, wherein the first and second housing covers are arranged on opposite end sides of the housing main body ( 16 ).

4. The spindle drive according to claim 2 , characterized in that the housing main body ( 16 ) and the housing cover ( 18 ) consist of plastic and are configured as an injection molded part.

5. The spindle drive according to claim 2 , characterized in that the housing cover ( 18 ) is of annular configuration with a through opening ( 48 ) for the spindle ( 28 ).

6. The spindle drive according to claim 5 , characterized in that the housing cover ( 18 ) has an axial thrust face for the drive element ( 25 ).

7. The spindle drive according to claim 2 , characterized in that the means ( 37 ) for arranging the drive element ( 25 ) in the receiving space ( 24 ) is an axial spring element which is configured to be pressed axially against the drive element ( 25 ) by the housing cover ( 18 ) and by way of the threaded connection ( 45 ).

8. The spindle drive according to claim 1 , characterized in that the drive element ( 25 ) is a worm gear and consists of plastic.

9. The spindle drive according to claim 1 , wherein the means ( 37 ) for arranging the drive element ( 25 ) in the receiving space ( 24 ) includes a shaft ring.

10. The spindle drive according to claim 1 , characterized in that the drive element ( 25 ) is a worm gear and consists of POM.

11. The spindle drive according to claim 1 , characterized in that the means for adjusting the size of the receiving region ( 39 ) includes an element ( 40 a ), wherein the threaded connection ( 45 a ) comprises an external thread ( 55 ) on the element ( 40 a ) and an internal thread ( 58 ) on the housing cover ( 18 a ), and wherein a centerline of the threaded connection ( 45 a ) is collinear with the rotational axis ( 32 ) of the spindle ( 28 ), and wherein the element ( 40 a ) is of annular configuration with a through opening ( 48 ) for the spindle ( 28 ).

12. The spindle drive according to claim 11 , characterized in that the element ( 40 a ) is a bearing element ( 52 , 54 ).

13. The spindle drive according to claim 12 , characterized in that the bearing element ( 52 , 54 ) is hat-shaped in cross section.

14. The spindle drive according to claim 13 , characterized in that the means ( 37 ) for arranging the drive element ( 25 ) in the receiving space ( 24 ) is an axial spring element compressed between the drive element ( 25 ) and a brim-like portion of the hat-shaped bearing element having a largest radius from the rotational axis ( 32 ) of the spindle ( 28 ).

15. The spindle drive according to claim 12 , characterized in that the bearing element ( 52 , 54 ) is a first bearing element, wherein a second bearing element ( 52 , 54 ) is provided, and wherein the first and second bearing elements are arranged on opposite end sides of the housing main body ( 16 ).

16. The spindle drive according to claim 11 , characterized in that the housing main body ( 16 ) and the element ( 40 a ) consist of plastic and are configured as an injection molded part.

17. The spindle drive according to claim 11 , characterized in that the element ( 40 a ) has an axial thrust face for the drive element ( 25 ).

18. The spindle drive according to claim 11 , characterized in that the means ( 37 ) for arranging the drive element ( 25 ) in the receiving space ( 24 ) is an axial spring element which is configured to be pressed axially against the drive element ( 25 ) by the element ( 40 a ) and by way of the threaded connection ( 45 a ).

19. A comfort drive ( 100 ), having a spindle drive ( 10 ) which is configured according to claim 1 .

20. A seat adjusting drive, having a spindle drive ( 10 ) which is configured according to claim 1 .

Assignees

• Bosch Gmbh Robert

Inventors

• Martiny Anna
• Angerer Christof
• Raul Enrique Adame Ramirez
• Peter Gilles
• Riedinger Markus

Classifications

• F16H57/022

  Adjustment of gear shafts or bearings (for compensating misalignment of axes of toothed gearings without orbital motion F16H1/26; for compensating misalignment of axes of planetary gears F16H1/48) · CPC title

• F16H1/16

  comprising worm and worm-wheel · CPC title

• F16H2025/2084

  Perpendicular arrangement of drive motor to screw axis · CPC title

• B60N2/067 Primary

  by linear actuators, e.g. linear screw mechanisms · CPC title

• F16H25/2003

  with arrangements for taking up backlash (F16H25/2209 takes precedence) · CPC title