Spindle drive assembly, vehicle flap with a spindle drive assembly and method for installing a spindle drive assembly

1. A spindle drive assembly for opening and/or closing a vehicle flap, comprising a spindle drive assembly housing which extends along a spindle drive axis and comprises, between its axial ends, a stop section acting axially on both sides, wherein a motor gear unit is arranged on a first axial side of the stop section and wherein a spindle unit is arranged on a second axial side of the stop section opposite the first axial side, wherein the stop section is manufactured in one piece with the spindle drive assembly housing.

2. The spindle drive assembly according to claim 1 , characterized in that the spindle drive assembly housing comprises a housing cap, which closes the spindle drive assembly housing on the motor gear unit side.

3. The spindle drive assembly according to claim 1 , characterized in that the motor gear unit is supported in the spindle drive assembly housing so as to be rotationally fixed with respect to the spindle drive axis.

4. The spindle drive assembly according to claim 3 , characterized in that the motor gear unit is supported in the spindle drive assembly housing by means of a damping element or by means of a plurality of damping elements.

5. The spindle drive assembly according to claim 1 , characterized in that the spindle unit comprises a guide tube fastened in the spindle drive assembly housing.

6. The spindle drive assembly according to claim 1 , characterized in that the spindle drive assembly housing is made from a plastic material.

7. A vehicle flap, comprising the spindle drive assembly according to claim 1 .

8. The vehicle flap according to claim 7 , which is a vehicle hatch or tailgate or vehicle trunk lid.

9. A method of assembling a spindle drive assembly for opening and/or closing a vehicle flap, comprising steps of:

(a) providing a spindle drive assembly housing extending along a spindle drive axis;

(b) inserting a motor gear unit into the spindle drive assembly housing starting from a first axial side of the spindle drive assembly housing; and

(c) inserting a spindle unit into the spindle drive assembly housing starting from a second axial side of the spindle drive assembly housing opposite the first axial side.

10. The method according to claim 9 , characterized in that the motor gear unit is mounted in the spindle drive assembly housing in a rotationally fixed manner.

11. The method according to claim 10 , characterized in that the motor gear unit is mounted in the spindle drive assembly housing with an interlocking fit.

12. The method according to claim 9 , characterized in that the spindle unit is fastened to the spindle drive assembly housing.

13. The method according to claim 12 , characterized in that a guide tube comprised by the spindle unit is fastened to the spindle drive assembly housing.

14. The method according to claim 9 , characterized in that a housing cap is placed on the spindle drive assembly housing on the motor gear unit side, so that the housing cap closes the spindle drive assembly housing.

15. The method according to claim 14 , characterized in that the housing cap is fastened inside the spindle drive assembly housing.

16. The method according to claim 9 , characterized in that a stop section acting axially on both sides is provided at the spindle drive assembly housing and the motor gear unit is placed against a first axial side of the stop section.

17. The method according to claim 9 , characterized in that a stop section acting axially on both sides is provided at the spindle drive assembly housing and the spindle unit is placed against a second axial side of the stop section opposite the first axial side.