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CN-121993471-A - Axial tolerance compensation device, connection and connection method between two components based thereon, and method for producing same

CN121993471ACN 121993471 ACN121993471 ACN 121993471ACN-121993471-A

Abstract

An axial tolerance compensation device for automatically compensating for tolerances between a first and a second component comprises a nut element having a radially outer fastening structure and an inner nut thread in a first direction, the fastening structure being fastenable in an opening of the first component, and a hollow screw, the head of which is located at a first axial end of the hollow screw, the radially outer side of which has an adjusting thread matching the nut thread and the radially inner side has a fastening thread in a second direction opposite to the first direction. The fastening thread interacts with the fastening screw such that the first component and the second component can be fastened to each other by means of the tolerance compensation means. The fastening screw includes a towing structure by which the fastening screw can establish a releasable towing connection with the cannulated screw, the towing torque being less than or equal to 0.2 Nm, such that when the fastening screw is rotated, the cannulated screw can be rotated synchronously and moved into abutment with the second component, and after overcoming the towing torque and releasing the towing connection, the fastening screw can be further screwed into the cannulated screw.

Inventors

  • Gunnar Lindner

Assignees

  • 伯尔霍夫连接技术有限公司

Dates

Publication Date
20260508
Application Date
20251106
Priority Date
20241106

Claims (13)

  1. 1. An axial tolerance compensation device (1) for automatically compensating for tolerances between a first component (a) and a second component (B), having the following features: a. A nut element (10) having a radially outer fastening structure (12) and an inner nut thread (22) of a first thread direction, the radially outer fastening structure (12) being fastenable in a component opening (O1) of the first component (A), B. A hollow screw (40) having a head (44) and a hollow cylindrical shaft (42), the head (44) being located at a first axial end (62) thereof, the hollow cylindrical shaft being provided on the radially outer side with an adjusting thread (52) cooperating with a nut thread (22), the radially inner side with a fastening thread (56) of a second thread direction, which is opposite to the first thread direction, wherein C. The fastening thread (56) interacts with a fastening screw (80) of a second thread direction such that the first component (A) and the second component (B) can be fastened to one another by the tolerance compensation device, wherein D. The fastening screw (56) comprises a towing structure, such that the fastening screw (80) can establish a releasable towing connection with the cannulated screw (40) by means of the towing structure, wherein the towing torque is less than or equal to 0.2 Nm, such that upon rotation of the fastening screw (80), the cannulated screw (40) can be rotated synchronously and moved into abutment with the second component (B), and upon overcoming the towing torque and releasing the towing connection, the fastening screw (80) can be screwed further into the cannulated screw (40).
  2. 2. Tolerance compensating device (1) according to claim 1, wherein the towing structure is provided near the second axial end (64) of the cannulated screw (40) by: a) Reducing the depth of the fastening thread (56), and/or B) The fastening thread (56) is configured to be at least partially interrupted, and/or C) The hollow screw (40) is configured to be partially or completely flat in the circumferential and axial directions adjacent to the radially inner side of the second axial end (64).
  3. 3. Tolerance compensating device (1) according to claim 1, further comprising a transportation safety structure to prevent an unintentional unscrewing of the cannulated screw (40) from the nut element (10) during transportation of the tolerance compensating device (1).
  4. 4. A tolerance compensating device (1) according to claim 3, wherein the transportation safety structure further provides a first anti-reverse safety structure between the cannulated screw (40) and the nut element (10).
  5. 5. Tolerance compensating device (1) according to claim 3 or 4, wherein the nut element (10) comprises axially protruding lugs (24) which, in combination with a transportation safety profile (68) radially outside the abutment surface (48) of the head (44) of the cannulated screw (40) towards the shaft, constitute the transportation safety structure.
  6. 6. Tolerance compensating device (1) according to claim 3 or 4, wherein the nut element (10) comprises axially protruding lugs (24) which, in combination with a transportation safety profile (68) radially outside the abutment surface (48) of the head (44) of the cannulated screw (40) towards the shaft, constitute the transportation safety structure, wherein the transportation safety profile (68) does not radially exceed the head (44) in a first circumferential portion (70), does not radially exceed an envelope circle of the head shape in a second circumferential portion (72), and radially exceeds the envelope circle in a third circumferential portion (74).
  7. 7. Tolerance compensating device (1) according to claim 4, wherein a second anti-reverse safety structure is further provided between the cannulated screw (40) and the nut element (10).
  8. 8. Tolerance compensating device (1) according to claim 7, wherein the second anti-reverse safety feature is formed in: a) Near the first axial end (62) of the cannulated screw (40), the adjusting thread (52) terminates discontinuously, and/or B) Near the first axial end of the nut element (10), the nut thread (22) of the nut element (10) terminates discontinuously.
  9. 9. Tolerance compensating device (1) according to one of claims 1,2,3,4, 7 or 8, wherein the ring nut element (10) and the cannulated screw (40) are made of a plastic material.
  10. 10. The connection of a first component (a) to a spaced-apart second component (B) is realized on the basis of a tolerance compensation device (1) according to one of the preceding claims and a fastening screw (80).
  11. 11. The connection according to claim 10, wherein the first component (a) has a keyhole geometry (90) in which a nut element (10) is provided.
  12. 12. Method of connecting a first component (a) with a spaced apart second component (B) with a tolerance compensating device (1) according to any of claims 1 to 9, the first component (a) having a keyhole geometry (90) and the second component (B) having a component opening (O2), the method comprising the steps of: a. fastening a nut element (10) preloaded with a cannulated screw (40) into an opening (O1) of the first component (A), B. Aligning the part opening (O2) of the second part (B) with the fastening thread (56) of the cannulated screw (40) and C. Threading a fastening screw (80) through the component opening (O2) into the fastening thread (56), D. Rotating the tightening screw (80) to thereby drive the cannulated screw (40) to rotate synchronously until the cannulated screw (40) abuts the second component (B), an E. when the head (44) of the cannulated screw (40) abuts against the second component (B), the fastening screw (80) is tightened in the fastening thread (56).
  13. 13. A method of manufacturing a tolerance compensating device (1) according to any of claims 1 to 9, comprising the steps of: a. (S1) providing an injection mold for the nut member (10) and the cannulated screws (40), B. (S2) injection molding the nut member (10) and the cannulated screw (40), and C. (S3) demolding the nut element (10) and the cannulated screw (40), and D. (S4) preassembling the cannulated screws (40) into the nut element (10).

Description

Axial tolerance compensation device, connection and connection method between two components based thereon, and method for producing same Technical Field The invention relates to an axial tolerance compensation device for automatically compensating axial tolerances between a first component and a second component, a connection of the two components based on the axial tolerance compensation device, a corresponding connection method and a method for producing the axial tolerance compensation device. Background In the prior art, different tolerance compensation devices are known, by means of which two components can be fastened at a distance from each other. These tolerance compensation means follow different technical principles. In order to achieve automatic axial tolerance compensation when two parts are connected, the prior art proposes tolerance compensation means that combine thread pairing of different thread directions with a trailing (dragging) element. This is described, for example, in EP 2 049 807 B1, DE 10 2020 216 324A1 and EP 1 780 424a 1. In particular, integrating the trailing structure into two interconnected threaded sleeves of which the thread pairs are different increases the difficulty in manufacturing such axial tolerance compensation devices, since the trailing structure is typically made of a different material than the threaded sleeves to be connected. Nevertheless, these devices have the advantage that they can be integrated into the connection process without any additional installation effort. When fastening the parts spaced apart from each other, the tolerance compensation means compensates the distance between the two parts in a supportive, automatic and subsequently mechanically loadable manner. According to german patent DE 10 2007 037 242A1, a fastening device for fastening a first component to a second component is disclosed that is capable of automatically compensating for tolerances in the distance between the two components. The device comprises a base unit, an adjusting unit and a fastening screw, wherein the base unit consists of a blind rivet nut which can be abutted to a first component, an adjusting threaded nut and a sleeve-shaped cage, the sleeve-shaped cage is used for accommodating the adjusting threaded nut and connecting the adjusting threaded nut with the blind rivet nut, the adjusting unit consists of a threaded sleeve, an abutting plate and a towing bush for connecting the threaded sleeve with the connecting plate, the threaded sleeve of the adjusting unit is screwed into the adjusting threaded nut of the base unit through a first threaded pair in a first threaded direction, and the fastening screw is screwed into the blind rivet nut abutted to the component through a second threaded pair opposite to a second threaded direction and forms detachable towing connection with the towing bush, so that the adjusting unit is driven to rotate in the same direction when the fastening screw is rotated, and the abutting plate is moved accordingly to compensate tolerance when the fastening screw is abutted to the second component. A disadvantage of these devices is that they result in complex overall construction of the tolerance compensating device and increased manufacturing difficulties, since the towing structure must be provided as a separate component. In the specific embodiment, DE 10 2020 216 324A1 therefore proposes to integrate the towing structure into the internal thread of the compensation element, which is immediately adjacent to the connection point. The integration may be achieved by applying a coating to the internal thread, by using a downwardly tapering thread, by deforming the internal thread, and/or by providing a break/defect point on the internal thread. Finally, according to european patent EP 2 980 421a1, an adjusting element for compensating a gap between a carrier and a component to be fixed is disclosed, which comprises a hollow body with an external thread in a first pitch direction. The hollow body further comprises an internal thread having a second pitch opposite to the first pitch and comprising at least two turns of thread, wherein at least one turn of thread is deformed to provide a higher friction torque than the other turns of thread. Deformed threads means that at least a portion of the threads are deformed so that they are closer to adjacent threads. That is, the distance between the deformed thread and the adjacent thread is smaller than the pitch of the internal thread. By bringing the deformed thread closer to the adjacent thread, a friction torque is created that is greater than the torque provided by the other undeformed turns of the internal thread. A disadvantage of these devices integrating the towing function is that the torque required to overcome the integrated towing function is generally greater than in known devices employing separate towing structures, and therefore further tightening of the tightening screw after tole