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DE-102011055363-B4 - Tolerance compensation screw connection and methods for manufacturing tolerance compensation screw connections

DE102011055363B4DE 102011055363 B4DE102011055363 B4DE 102011055363B4DE-102011055363-B4

Abstract

Device for fastening a first component (1) at a tolerance distance (A) to a second component (2) by means of a fastening screw (3), comprising a support part (4) attachable to the first component (1) with a first thread (5) and a spacer part (6) having a second thread (7), wherein stop elements (9, 10) are provided on the support part (4) and on the spacer part (6), which enter a stop position when the two threads (5, 7) forming a thread pair are screwed together, wherein the stop elements (9, 10) have at least one stop shoulder (9) arranged at a free end of a first spring element (8) that is elastically deflectable in the axial direction and at least one stop step (10), characterized in that the spring travel (F) of the first spring element (8) is greater than the thread pitch when there is only one stop step (10) and is greater than a stop step (F) when there are several, in particular circumferentially uniformly distributed, stop steps (10) or stop shoulders (9). The number of stop steps (10) or stop shoulders (9) corresponds to a fraction of the thread pitch, and the stop shoulder (9) rests against the stop step (10) in the stop position in such a way that further rotation in the direction of a thread clamping position is prevented and the device has its smallest axial extent in the stop position.

Inventors

  • Volker Schlicker
  • Siegmund Kustos

Assignees

  • WITTE AUTOMOTIVE GMBH

Dates

Publication Date
20260513
Application Date
20111115
Priority Date
20101115

Claims (11)

  1. Device for fastening a first component (1) at a tolerance distance (A) to a second component (2) by means of a fastening screw (3), comprising a support part (4) attachable to the first component (1) with a first thread (5) and a spacer part (6) having a second thread (7), wherein stop elements (9, 10) are provided on the support part (4) and on the spacer part (6), which enter a stop position when the two threads (5, 7) forming a thread pair are screwed together, wherein the stop elements (9, 10) have at least one stop shoulder (9) arranged at a free end of a first spring element (8) that is elastically deflectable in the axial direction and at least one stop step (10), characterized in that the spring travel (F) of the first spring element (8) is greater than the thread pitch when there is only one stop step (10) and is greater than the thread pitch when there are several, in particular circumferentially uniformly distributed, stop steps (10) or stop shoulders (9). a fraction of the thread pitch corresponding to the number of stop steps (10) or stop shoulders (9), and the stop shoulder (9) in the stop position rests against the stop step (10) in such a way that further rotation in the direction of a thread clamping position is prevented and the device has its smallest axial extent in the stop position.
  2. Device according to Claim 1 , characterized in that the stop shoulder (9) is formed by a blunt end of the spring element (8).
  3. Device according to one of the preceding claims, characterized in that the first spring element (8) projects from a stop disk (11) of the spacer part (6) towards an end face (12) of the support part (4) and that the one or more stop steps (10) are formed from the end face (12) of the support part (4).
  4. Device according to one of the preceding claims, characterized in that the stop step (10) is formed by a first wall of a locking groove (13), the second wall of which opposite this forms a locking step for the first spring element (8) in order to temporarily fix it in the stop position.
  5. Device according to one of the preceding claims, characterized in that the first spring element (8) projects from the spacer part (6) towards the support part (4) or from the support part (4) towards the spacer part (6) and has a curved end which forms on the one hand the substantially blunt stop shoulder (9) and on the other hand a detent chamfer (15).
  6. Device according to one of the preceding claims, characterized in that the first spring element (8) projects from a radial web (16) of a ring (17) which is fastened between a threaded sleeve (18) and a stop disc (11) of the spacer part (6).
  7. Device according to Claim 6 , characterized in that the radial web (16) is secured against rotation in front of a step formed in particular by a wall of a groove (19).
  8. device according to one of the Claims 6 or 7 , characterized by a collar (20) of the threaded sleeve (18) extending through the ring (17), which is crimped to the stop washer (11).
  9. Device according to one of the preceding claims, characterized by a second spring element (28) which is rotationally fixed and axially fixed to the spacer part (6) and which enters into a frictional rotary drive connection to a fastening screw (3) inserted into the spring element (8).
  10. Device according to one of the preceding claims, characterized in that the first spring element (8) is formed by a wire spring, the first end of which forms the stop shoulder (9) and the second end of which (29) is inserted in the groove (19).
  11. Method for manufacturing devices according to one of the preceding claims, wherein the stop means (9, 10) have a first number of stop shoulders (9) and a second number of stop steps (10), wherein the first and second number is at least 1, characterized in that the thread chamfers of the first and second threads (5, 7) are randomly oriented to the angular position of the stop means (9, 10).

Description

The invention relates to a device for fastening a first component to a second component at a tolerance distance by means of a fastening screw, comprising a support part with a first thread that can be fastened to the first component and a spacer part having a second thread, wherein stop means are provided on the support part and on the spacer part which, when the two threads forming a thread pair are screwed together, enter a stop position that prevents further rotation into a thread clamping position, in which the device has its smallest axial extension, wherein the two threads are screwed apart by means of a rotary drive connection to the fastening screw when the screw is turned until it reaches a support position on the second component that fills the distance. The invention further relates to a method for manufacturing such devices. Devices with the aforementioned properties reveal the DE 103 00 991 A1 and the DE 10 2007 037 242 A1 . Such a device is used in the DE 103 00 991 A1 described. A ring part attached to the support part has a spring element which, in a home position, engages in a hole of a spacer part to prevent the spacer part from rotating relative to the support part during transport or the like. Such a device discloses the DE 10 2007 056 457 A1 A support element is rotationally fixed. The support element has a mating thread for screwing in the fastening screw. A spacer with an external thread is screwed into an internal thread recess of the support element. This is a left-hand thread pairing. A spring element with torque application zones is located in a recess of the spacer. These zones contact the thread crest, i.e., the outer surface of the thread, when the fastening screw is inserted. In its initial position, the spacer is almost completely screwed into the support element. Stops are provided to prevent the spacer and support element from being screwed together to a thread clamping position. Thus, in its initial position, the spacer can be rotated relative to the support element with a relatively small torque. A transport lock is provided to prevent unintentional rotation of the spacer relative to the support element. A detent spring is located behind a detent step. When the fastening screw is inserted through a mounting hole in the second component, which is located at a tolerance distance from the first component, it then enters the opening in the spacer containing the spring element. The spring arms of this spring element spread apart, forming a friction-fit torque transmission surface. As the fastening screw is screwed into the mating thread, the spacer is pulled along with it, first overcoming the transport lock and then being pulled along until it is in a support position relative to the second component. The rotational movement of the spacer ends when it comes to rest against the second component. The fastening screw is now fully screwed into the mating thread until its head rests against the second component. The internal thread cut into the support part and the external thread cut into the spacer have thread chamfers that can be oriented at any desired angle. The mounting of the lifting devices on the support part on the one hand and on the spacer part on the other must be carried out in such a way that the lifting devices hold the device in a basic position in which the threaded pair cannot assume a thread clamping position, i.e., cannot be fully screwed together. Therefore, when mounting the known tolerance compensation screw connection, the spacer part is first fully screwed into the support part and then slightly unscrewed from the support part. The lifting devices are adjusted in this basic position. The invention is based on the objective of simplifying the manufacturing of a tolerance compensation screw connection. The problem is solved by the invention specified in the claims, which focuses on the fact that the stop elements have at least one stop shoulder arranged at a free end of an axially elastically deflectable spring element and at least one stop step. The spring travel of the spring element is adapted to the pitch of the thread pairing and to the maximum angular distance to the stop step such that, regardless of the angular position of the stop elements relative to the thread engagement of the respective thread, the stop shoulder abuts the stop step before the thread clamping position of the threads is reached. The spring element can be associated with the support part or the spacer part. The stop step corresponding to the stop shoulder is then associated with the other part. Preferably, the spacer part is the carrier of the spring element. The support part then forms the stop step. One or more stop steps can be provided. If several stop steps are provided, they are preferably distributed at uniform angular intervals. The axis of rotation of the spacer. The stop steps are preferably formed by an end face located on the axis of rotation. If only one stop step is