Spindle gearbox and drive unit of an electric seat drive
The invention relates to a spindle gearbox ( 1 ) of an electric seat drive, comprising a gearbox housing ( 2 ) for mounting a worm gear ( 3 ) and a worm, the worm meshing with the worm gear ( 3 ), a threaded spindle ( 4, 5 ) connected to the worm gear ( 3 ), a first lid ( 6 ), and a second lid ( 7 ), wherein the first lid ( 6 ) and the second lid ( 7 ) are fastened parallel to one another on the gearbox housing ( 2 ). The threaded spindle ( 4, 5 ) is guided through the first lid ( 6 ), and the first lid ( 6 ) is fastened on the gearbox housing ( 2 ) independently of the second lid ( 7 ).
1. A spindle mechanism ( 1 ) of an electric seat drive, comprising
a mechanism housing ( 2 ) for mounting a worm gear ( 3 ) and a worm ( 33 ), the worm ( 33 ) meshing with the worm gear ( 3 ),
a threaded spindle ( 4 , 5 ) which is connected to the worm gear ( 3 ) and which has an axis, wherein the mechanism housing ( 2 ) is configured to have the threaded spindle ( 4 , 5 ) inserted into the mechanism housing ( 2 ),
a first cover ( 6 ), and
a second cover ( 7 ),
the first cover ( 6 ) and the second cover ( 7 ) being fastened parallel to one another to the mechanism housing ( 2 ),
the threaded spindle ( 4 , 5 ) being guided through the first cover ( 6 ), and the first cover ( 6 ) being fastened to the mechanism housing ( 2 ) independently of the second cover ( 7 ),
wherein the threaded spindle ( 4 , 5 ) is a rotatable spindle ( 4 ) or a plunger spindle ( 5 ),
wherein the second cover ( 7 ) has a central through opening in the direction of the axis, the central through opening being configured for mounting the plunger spindle ( 5 ), and
wherein the central through opening is configured to be closed by a compensation plate ( 15 ) that is configured to bear axially against the rotatable spindle ( 4 ).
2. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that a first face of the mechanism housing ( 2 ) is symmetrical with respect to a plane perpendicularly with respect to the threaded spindle ( 4 , 5 ) to a second face of the mechanism housing ( 2 ).
3. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that the mechanism housing ( 2 ) has openings ( 8 ) along the threaded spindle axis, wherein the openings ( 8 ) are of symmetrical configuration, each opening ( 8 ) being configured to be closed by the first cover ( 6 ) or the second cover ( 7 ).
4. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that the mechanism housing ( 2 ) is closed completely by the first cover ( 6 ) and the second cover ( 7 ), except for a drive opening for attaching a drive motor ( 11 ) to the worm ( 33 ) which is not closed by the first cover ( 6 ) and the second cover ( 7 ).
5. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that the first cover ( 6 ) and the second cover ( 7 ) are screwed to the mechanism housing ( 2 ) independently of one another.
6. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized by at least one mounting screw ( 12 , 9 ), the mounting screw ( 12 , 9 ) fastening the first cover ( 6 ) or simultaneously the first cover ( 6 ) and the second cover ( 7 ) to the mechanism housing ( 2 ).
7. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that the first cover ( 6 ) and/or the second cover ( 7 ) are/is of a single piece configuration.
8. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that the first cover ( 6 ) and/or the second cover ( 7 ) are/is manufactured from a plastic material or a metal material.
9. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that the second cover ( 7 ) has a cylindrical bearing bush ( 40 ), into which axial projections ( 43 ) of the worm gear ( 3 ) engage axially.
10. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that a through bore ( 29 ) is configured as a vehicle connection geometry ( 19 ) transversely with respect to the threaded spindle axis on the second cover ( 7 ).
11. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that receptacles for fastening elements are configured as a vehicle connection geometry ( 19 ) on the mechanism housing ( 2 ).
12. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that a recess for receiving the compensation plate ( 15 ) is provided in the second cover ( 7 ), wherein the second cover ( 7 ) bears tightly against the mechanism housing ( 2 ) with or without the compensation plate ( 15 ).
13. The spindle mechanism ( 1 ) as claimed in claim 1 , characterized in that the mechanism housing ( 2 ) has openings ( 8 ) along the threaded spindle axis, wherein the openings ( 8 ) are of symmetrical configuration with regard to a threaded spindle axis, each opening ( 8 ) being configured to be closed by the first cover ( 6 ) or the second cover ( 7 ).
14. The spindle mechanism ( 1 ) as claimed in claim 1 , wherein the threaded spindle ( 4 , 5 ) is the rotatable spindle ( 4 ), and wherein a through bore ( 29 ) is configured as a vehicle connection geometry ( 19 ) transversely with respect to the threaded spindle axis on the second cover ( 7 ) for fastening the seat drive which requires the rotatable spindle ( 4 ).
15. The spindle mechanism ( 1 ) as claimed in claim 1 , wherein the threaded spindle ( 4 , 5 ) is the plunger spindle ( 5 ), and wherein receptacles for fastening elements are configured as a vehicle connection geometry ( 19 ) on the mechanism housing ( 2 ) for fastening the seat drive which requires the plunger spindle ( 5 ).
16. A drive unit ( 10 ) of an electric seat drive, comprising:
a spindle mechanism ( 1 ) including
a mechanism housing ( 2 ) for mounting a worm gear ( 3 ) and a worm ( 33 ), the worm ( 33 ) meshing with the worm gear ( 3 ),
a rotatable spindle ( 4 ) which is connected to the worm gear ( 3 ), which has an axis, and which is inserted into the mechanism housing ( 2 ),
a first cover ( 6 ), and
a second cover ( 7 ),
the first cover ( 6 ) and the second cover ( 7 ) being fastened parallel to one another to the mechanism housing ( 2 ),
the rotatable spindle ( 4 ) being guided through the first cover ( 6 ), and
the first cover ( 6 ) being fastened to the mechanism housing ( 2 ) independently of the second cover ( 7 ),
wherein the second cover ( 7 ) has a central through opening in the direction of the axis, and
wherein the central through opening in the second cover ( 7 ) is closed by a compensation plate ( 15 ) such that the rotatable spindle ( 4 ) bears axially against the compensation plate ( 15 ); and
a drive motor ( 11 ),
wherein the worm ( 33 ) of the spindle mechanism ( 1 ) is driven by the drive motor ( 11 ).