Spindle drive for an adjusting mechanism for vehicle seats
AssigneeAlfred Teves GmbH & Co. OHG
InventorsHorst Jeck, Hans G. Menne
Life of this patent
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Abstract
A spindle drive for a vehicle seat connected with an upper rail. According to this invention, an upper rail slides on the surface of a drive nut preferably made of plastic whose internal thread is engaged by the spindle. Advantageous further developments deal with improving the longitudinal guidance of the upper rail on the drive nut as well as with preventing the upper rail from radially moving away from the drive nut.
Claims38
A spindle drive for an adjusting mechanism of a vehicle seat including a spindle (2) supported on an upper rail (1), connected with a seat cushion, where the spindle engages a drive nut (4) supported in respect of the vehicle bottom, with the spindle rotation caused by a drive (7) moving the upper rail (1) and the vehicle seat in the longitudinal direction of the spindle, characterized in that the upper rail (1) is guided in an axially sliding manner on the abutment surface (17) of the drive nut (4), where the drive-nut (4) abutment surface (17) and the upper-rail (1) inside surface, which seats itself on the same, have recesses (23) and projections (24), respectively, which correspond to one another, and which extend in the longitudinal direction of the spindle, to form a guideway for the upper rail (1) in the longitudinal direction of the spindle (2).
A spindle drive, for an adjusting mechanism of a vehicle seat including a spindle (2) supported on an upper rail (1), connected with a seat cushion, where the spindle engages a drive nut (4) supported in respect of the vehicle bottom, with the spindle rotation caused by a drive (7) moving the upper rail (1) and the vehicle seat in the longitudinal direction of the spindle, characterized in that the upper rail (1) is guided in an axially sliding manner on the abutment surface (17) of the drive nut (4), where the upper rail (1) has a guide rail (24) which extends over the length of and runs in the longitudinal direction of said upper rail (1), which plunges into a corresponding longitudinal groove (23) in the drive nut (4), and which takes care of a lateral support of the upper rail (1) in the drive nut (4).
A spindle drive, for an adjusting mechanism of a vehicle seat including a spindle (2) supported on an upper rail (1), connected with a seat cushion, where the spindle engages a drive nut (4) supported in respect of the vehicle bottom, with the spindle rotation caused by a drive (7) moving the upper rail (1) and the vehicle seat in the longitudinal direction of the spindle, characterized in that the upper rail (1) is guided in an axially sliding manner on the abutment surface (17) of the drive nut (4), where the drive nut has pivots (12, 13) extending in the horizontal direction and in the direction transverse to a longitudinal axis of the spindle, by means of which pivots (12, 13) the drive nut (4) is rotatably supported in the horizontal direction and in the direction transverse to the longitudinal axis of the spindle in a cage (5) fastened to the vehicle bottom, where one side surface of the cage is shaped out of a lower rail and in that the second side surface (9) is undetachably connected with the lower rail after the drive nut (4) has been inserted into the cage (5).
A spindle drive for a vehicle seat adjusting mechanism comprising:
- an upper rail supporting a vehicle seat cushion;
- a drive nut fixedly supported on the vehicle;
- a spindle rotatably supported in the upper rail;
- drive means for rotating the spindle to move the upper rail and the vehicle seat in a longitudinal direction of the spindle;
- and
- an abutment surface formed on the drive nut, the upper rail axially sliding on the abutment surface, wherein the upper-rail has an inside surface which seats on the abutment surface of the drive nut, the inside surface and the abutment surface having recesses and projections, respectively, which correspond to one another, and which extend in the longitudinal direction of the spindle to form a guideway for the upper rail extending in the longitudinal direction of the spindle.
A spindle drive for a vehicle seat adjusting mechanism comprising:
- an upper rail supporting a vehicle seat cushion;
- a drive nut fixedly supported on the vehicle;
- a spindle rotatably supported in the upper rail;
- drive means for rotating the spindle to move the upper rail and the vehicle seat in a longitudinal direction of the spindle;
- an abutment surface formed on the drive nut, the upper rail axially sliding on the abutment surface;
- and
- a guide rail formed in the upper rail extending over the length of and in the longitudinal direction of said upper rail, the guide rail plunging into a corresponding longitudinal groove in the drive nut to provide lateral support of the upper rail in the drive nut.
A spindle drive for a vehicle seat adjusting mechanism comprising:
- an upper rail supporting a vehicle seat cushion;
- a drive nut fixedly supported on the vehicle;
- a spindle rotatably supported in the upper rail;
- drive means for rotating the spindle to move the upper rail and the vehicle seat in a longitudinal direction of the spindle;
- an abutment surface formed on the drive nut, the upper rail axially sliding on the abutment surface;
- pivots formed on the drive nut extending in the horizontal direction and in the direction transverse to the longitudinal axis of the spindle;
- the pivots rotatably supporting the drive nut in the horizontal direction and in the direction transverse to the longitudinal axis of the spindle in a cage fastened to the vehicle bottom;
- and
- one side surface of the cage is shaped out of a lower rail and the second side surface is undetachably connected with the lower rail after the drive nut has been inserted into the cage.
Dependencies are inferred from the claim text.