Spindle drive for an adjusting element of a motor vehicle

Abstract

The invention relates to a spindle drive for an adjusting element (1) of a motor vehicle, wherein a drive unit (2) and a spindle / spindle nut transmission (3) for producing linear driving motions, which is arranged downstream of the drive unit (2) in regard to driving, are provided, wherein the spindle / spindle nut transmission (3) comprises a spindle (8) and a spindle nut (9) that meshes with the spindle, wherein the spindle drive comprises two drive segments (10, 11), which run inside each other in a telescoping manner during a motorized adjustment, wherein the spindle (8) is associated with the one drive segment (10) and the spindle nut (9) is associated with the other drive segment (11), wherein the two drive segments (10, 11) are coupled in a torque-transmitting manner in the sense of twist prevention. According to the invention during the motorized adjustment, the spindle nut (9) runs inside a guide tube (15) of the spindle-side drive segment (10) along the spindle axis (7) and is prevented from twisting with respect to guide tube (15), and that, as viewed in the cross-section, at least one formation (16) inside the guide tube (15) is in or can be brought into engagement with an associated counter formation (17) in the region of the spindle nut (9) in a torque-transmitting manner for the twist prevention and the two formations (16, 17) associated with each other interact in a wedge-like manner for this torque transmission in such a way that a radial force component is produced.

Description

technical field [0001] The invention relates to a spindle drive for an adjusting element of a motor vehicle according to the preamble of claim 1 and a corresponding spindle drive according to the preamble of claim 11 . Background technique [0002] The term "tuning element" is currently to be understood in a broad sense. These include, for example, rear lids, trunk lids, engine hoods, side doors, cargo lids, lift-off roofs, etc. of motor vehicles. The following areas of application for the motorized adjustment of the rear lid of a motor vehicle are in the foreground. This should not be construed as limiting. [0003] In the context of the motorized manipulation of the rear cover, spindle drives have proven suitable in recent years. Currently, high compactness as well as low weight are in the foreground. [0004] The known spindle drive (DE 20 2005 000 559 U1) from which the present invention is based generally has two drive sections, one of which is associated with the s...

AI Technical Summary

Problems solved by technology

[0008] A disadvantage of known spindle drives is the fact that a weight-reduced design of the housing is only possible within narrow limits due to the load associated with the torsional resistance.

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