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CN-121993005-A - Device for automatically adjusting a cover or door of a motor vehicle and motor vehicle

CN121993005ACN 121993005 ACN121993005 ACN 121993005ACN-121993005-A

Abstract

The invention relates to a device (3 a) for automatically adjusting a cover or door of a motor vehicle, comprising an outer tube (30) and an inner tube (31) arranged in the outer tube (30), wherein a drive train (A) for a spindle drive (38) is provided, which comprises an electric motor (35) and a transmission (36). The outer tube (30) and the inner tube (31) can be moved relative to each other in a telescoping manner by means of a spindle drive (38). The invention proposes that a component having a base body and at least one wing element protruding radially from the base body is additionally integrated into the drive train (A), wherein the component is supported in a container (37) having a viscous fluid.

Inventors

  • STEINMANN STEFAN
  • S. Exeter

Assignees

  • 大众汽车股份公司

Dates

Publication Date
20260508
Application Date
20251103
Priority Date
20241105

Claims (12)

  1. 1. Device (3 a,3 b) for automatically adjusting a cover plate (2) or a door of a motor vehicle (K), comprising an outer tube (30) and an inner tube (31) arranged in the outer tube (30), wherein a drive train (a) of a spindle drive (38) is provided, comprising an electric motor (35) and a drive (36), wherein the outer tube (30) and the inner tube (31) can be moved relative to one another in a telescoping manner by means of the spindle drive (38), characterized in that a component (42 a,42b,42 c) having a base body (43) and at least one wing element (47) protruding radially from the base body is additionally inserted into the drive train (a), wherein the component (42 a,42b,42 c) is supported in a container (37) with a viscous fluid (F).
  2. 2. The device (3 a,3 b) according to claim 1, wherein the wing-like element (47) has an asymmetric cross section.
  3. 3. The device (3 a,3 b) according to claim 2, characterized in that the asymmetric cross section is formed by a first side (47 b) and a second side (47 a) opposite the first side (47 b), wherein the first side (47 b) is configured such that it has a higher flow resistance than the second side (47 a).
  4. 4. The device (3 a,3 b) according to any one of the preceding claims, wherein the wing element (47) has at least one through opening (48 a,48 b).
  5. 5. The device (3 a,3 b) according to claim 4, characterized in that the wing element (47) has two through openings (48 a,48 b).
  6. 6. The device (3 a,3 b) according to claim 5, characterized in that the through openings (48 a,48 b) have different diameters.
  7. 7. The device (3 a,3 b) according to any one of the preceding claims, characterized in that there are at least two wing-like elements (47) protruding radially from the base body (43) and arranged evenly distributed around the circumference of the base body (43).
  8. 8. The device (3 a,3 b) according to any one of the preceding claims, characterized in that one wing element (47) has a shoulder (47 c) in the profile, or the length (i) of the wing element (47) of one wing element (47) protruding radially from the base body (43) is reduced relative to the corresponding length of the other wing element (47), wherein the shoulder (47 c) or the wing element (47) with reduced length (i) faces the lid (37 a) of the container (37).
  9. 9. The device (3 a,3 b) according to any one of the preceding claims, characterized in that the elongated base body (43) has at one end side a coupling element (46) provided with an inner contour for achieving a form fit and at the opposite side a coupling element (44) provided with an outer contour for achieving a form fit.
  10. 10. The device (3 a) according to any one of the preceding claims 1 to 9, characterized in that the container (37) with the components (42 a,42b,42 c) is arranged in the drive train (a) on the driven side of the transmission (36).
  11. 11. The device (3 b) according to any one of the preceding claims 1 to 9, characterized in that the container (37) with the components (42 a,42b,42 c) is arranged in the drive train (a) on the drive side of the transmission (36).
  12. 12. A motor vehicle (K), characterized by at least one device (3 a,3 b) according to any one of the preceding claims.

Description

Device for automatically adjusting a cover or door of a motor vehicle and motor vehicle Technical Field The invention relates to a device for automatically adjusting a cover or door of a motor vehicle, comprising an outer tube and an inner tube arranged in the outer tube, wherein a drive train of a screw drive is provided, which drive train comprises an electric motor and a gear, wherein the outer tube and the inner tube can be moved relative to one another in a telescopic manner by means of the screw drive. Background In order to increase comfort, modern vehicles are increasingly equipped with means for automatically adjusting the cover, in particular the tailgate. Thereby significantly facilitating the opening and closing of the cover plate. In this case, conventional devices for automatically adjusting the cover plate are equipped with a permanent brake in order to ensure a safe holding of the cover plate when required in any open position of the cover plate. The device for automatically adjusting the cover plate further has a spindle drive (Spindeltrieb), wherein the friction linings pressed against one another by the spring force generate a desired braking torque. One disadvantage of such screw drives is the occurrence of operational noise, high manufacturing tolerances and high temperature sensitivity. An adjusting device for automatically actuating a tailgate of a motor vehicle is known from EP 2 543 808 A1, which comprises an assembly of a motor drive and a tubular housing part. The tubular housing member is extendable and retractable in a telescopic manner by a motor drive comprising an electric motor and a transmission driven by the electric motor. The transmission also has a pivoting mechanism. In addition, a braking device is present in the adjusting device. The braking device has a carrier part fastened at the motor, in which carrier part an annular hysteresis element is held. In turn, a disk having alternating magnetic poles and a defined radial distance from the hysteresis element is arranged in the hysteresis element. Finally, a rotary damper is known from EP 3 467 A1, which enables the braking torque to be set. The rotary damper has a partition member and first and second adjusting bolts. The partition member has first and second flow paths connecting regions of the cylindrical chamber partitioned by the partition member. Further, there are a first introduction hole connected to the first flow path and to the first adjusting bolt screw hole of the housing, and a second introduction hole connected to the second flow path and to the second adjusting bolt screw hole of the housing. The first adjusting bolt is screwed into the first adjusting bolt screw hole and is thereby introduced into the first introduction hole. The length of the first adjusting screw that protrudes into the first flow path can thereby be adjusted. The second adjusting bolt is screwed into the second adjusting bolt screw hole and thereby introduced into the second introduction hole. The length of the second adjusting screw that protrudes into the second flow path can thereby likewise be adjusted. Disclosure of Invention The object of the present invention is to provide a device for automatically adjusting a cover or door of a motor vehicle, which operates without noise and without wear. This object is achieved by a device according to the invention for automatically adjusting a cover or door of a motor vehicle. Advantageous embodiments or improvements of the invention can be seen from the remaining embodiments according to the invention. The invention is based on a device for automatically adjusting a cover or door of a motor vehicle, comprising an outer tube and an inner tube arranged in the outer tube. Here, there is a drive train of a screw drive, which has an electric motor and a drive. The outer tube and the inner tube can be moved in a telescoping manner relative to one another, i.e. back and forth, by means of a spindle drive. The invention proposes that a component having a base body and at least one wing element protruding radially from the base body be additionally inserted into the drive train. In other words, the member is kinematically coupled to the motor and the transmission and thus moves with the motor or the transmission as it moves. The component is supported in a container with a viscous fluid. By means of these features, a device for automatically adjusting a cover or door of a motor vehicle can be provided, which operates noise-free and wear-free. In particular, a braking action is applied to the wing-like elements by means of the viscous fluid, which braking action occurs noiseless. A development of the invention provides that the wing-like elements have an asymmetrical cross section. In this way, it is achieved that a braking torque that is not as high can be generated depending on the direction of rotation of the drive train. According to a further embodiment, the asymmetrical cross section is form