CN-121993470-A - Axial tolerance compensation device, connection between two components having such a device, and method for connecting and producing such a device

Abstract

An axial tolerance compensation device for automatically compensating tolerances between a first component and a second component is characterized by a nut element having a radially outer fastening structure which can be fastened in a component opening of the first component and having an inner nut thread in a first thread direction, and a cannulated screw. The hollow screw has a head and a hollow cylindrical shaft, the radially outer part of which has an adjusting thread which matches the internal nut thread and the radially inner part has a fastening thread of a second thread direction which is opposite to the first thread direction, wherein the fastening thread interacts with the fastening screw of the second thread direction such that the first component and the second component can be fastened to each other by means of an axial tolerance compensation device, wherein the hollow cylindrical shaft comprises a disassembly protection arrangement at the axial end facing away from the head, by means of which disassembly protection arrangement the hollow screw is prevented from unscrewing from the nut element during installation of the axial tolerance compensation device.

Inventors

• Gunnar Lindner
• Sandra stephensevier

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 automatic compensation of tolerances between a first component (a) and a second component (B), characterized by the following features: a. A nut element (10) having a radially outer fastening structure (12) which can be fastened in a component opening (O1) of the first component (A), the nut element further having an inner nut thread (22) of a first thread direction, B. A cannulated screw (40) having a head (44) and a hollow cylindrical shaft (42) with a radially outer portion having an adjusting thread (52) matching the internal nut thread (22) and a radially inner portion having a fastening thread (56) of a second thread direction opposite to the first thread direction, wherein the fastening thread is aligned with the internal nut thread (22) C. A fastening screw (80) of the second thread direction interacts such that the first component (A) and the second component (B) can be fastened to one another by the axial tolerance compensation device (1), wherein D. The hollow cylindrical shaft (42) comprises a disassembly protection structure (60) at an axial end facing away from the head, wherein the hollow screw (40) is prevented from unscrewing from the nut element (10) during installation of the axial tolerance compensation device (1) by the disassembly protection structure (60).
2. 2. The axial tolerance compensation device (1) according to claim 1, characterized in that the ring-shaped nut element (10) and the cannulated screw (40) are made of a plastic material.
3. 3. The axial tolerance compensating device (1) according to claim 1 or 2, characterized in that the disassembly protection structure (60) comprises a circumferential shaft wall (60) or at least two radially thermally expandable axial webs (64) extending in the axial direction of the hollow screw (40) such that at least one free end of the shaft wall (60) or the axial webs (64) extends radially beyond the inner diameter D I of the nut element (10).
4. 4. The axial tolerance compensating device (1) according to claim 1 or 2, characterized in that the disassembly protection structure (60) comprises at least two axial webs (66) extending in the axial direction of the cannulated screw (40), each extending with a constant radial width or tapering with increasing radial width to a free end.
5. 5. The axial tolerance compensating device (1) according to claim 4, characterized in that the at least two axial webs (66) have a radially inner side and a radially outer side, the inner sides of the at least two axial webs extending substantially parallel and the outer sides extending radially outwards obliquely to the longitudinal axis of the cannulated screw (40).
6. 6. The axial tolerance compensating device (1) according to claim 5, characterized in that the radially inner side of the at least two axial webs (66) does not comprise any threads, such that the fastening screw (80) is inhibited by rotation of the axial webs (66) and/or that the fastening screw moves the axial webs radially further outwards than in the case of threading.
7. 7. The axial tolerance compensating device (1) according to claim 1 or 2, wherein the disassembly protection arrangement (60) comprises at least two axial webs (68) extending in the axial direction of the cannulated screw (40), each axial web having a radially outward radial web (70) arranged radially outward.
8. 8. Axial tolerance compensating device (1) according to claim 7, characterized in that at least two radial webs (70) are arranged relative to each other such that they form a circumferentially extending threaded web.
9. 9. The axial tolerance compensation device (1) according to claim 1 or 2, characterized in that the fastening thread (56) of the hollow screw (40) is molded into the hollow cylindrical shaft (42) in the form of an overmolded metal threaded insert (74).
10. 10. A connection of a first component (a) and a second component (B) spaced from the first component, characterized by comprising an axial tolerance compensation device (1) according to any one of claims 1-9 and a fastening screw.
11. 11. The connection according to claim 10, characterized in that the first part (a) comprises a keyhole geometry (90) in which the nut element (10) is arranged.
12. 12. A method of connecting a first component (a) having a keyhole geometry (90) and a second component (B) spaced from the first component having a component opening (O2) using an axial tolerance compensation device (1) according to any one of claims 1-9, comprising the steps of: a. -fixing (a) the nut element (10) preloaded with the cannulated screw (40) in a component opening (O1) of the first component (a) B. Arranging (B) a part opening (O2) of the second part (B) opposite a fastening thread (56) of the cannulated screw (40), and screwing (c) a fastening screw (80) which protrudes through the part opening (O2) into the fastening thread (56), C. rotating (d) the tightening screw (80) and thereby bringing the cannulated screws (40) together until they abut the second part (B), and D. When the head (44) of the cannulated screw abuts the second component (B), the fastening screw (80) is tightened (e) into the fastening thread (56).
13. 13. A method of manufacturing an axial tolerance compensation device (1) according to any one of claims 1-9, comprising the steps of: a. Providing (S1) an injection mold for the nut element (10) and the cannulated screw (40), B. Injection molding (S2) the nut element (10) and the cannulated screw (40), C. demolding (S3) the nut element (10) and the cannulated screw (40), and D. -pre-installing (S4) the cannulated screw (40) into the nut element (10).

Description

Axial tolerance compensation device, connection between two components having such a device, and method for connecting and producing such a device Technical Field The invention relates to an axial tolerance compensation device for automatically compensating tolerances between a first component and a second component, a connection between two components by means of the axial tolerance compensation device, a corresponding connection method using the axial tolerance compensation device and a production method. Background In the prior art, a number of different tolerance compensation devices are known, by means of which two components can be fastened to each other at a distance. These tolerance compensation means follow different technical principles. DE102010048239A1 describes a first component with a hollow-cylindrical fastening groove. The tolerance compensating sleeve can be slid into the fastening groove. The tightening screw is then screwed into the tolerance compensating sleeve through the opening of the second part. During screwing, the tolerance compensating sleeve expands radially, clamping itself in the fastening groove of the first component. At the same time, the second part is pulled towards the tolerance compensating sleeve to establish a connection between the first part and the second part. According to the technical teaching of european patent application 0414162A1, firstly an anchor with a hollow shaft is arranged in the opening of the first component. The spacer is then screwed into the hollow shaft until it compensates for the distance existing between the first and second parts. By screwing the fastening screw into the spacer through the opening of the second part, the spacer expands like an expansion pin. In this way, on the one hand, a fixation of the second part with the spacer anchored in the anchoring device is achieved, and on the other hand, a clamping, radial expansion of the spacer is achieved to fix the adjusted tolerances between the first part and the second part. This construction is rather laborious, for example, without compensating for tolerances automatically when screwing in the fastening screw. Instead, the anchor is first fixed in the first component and then the spacer is adjusted to the distance between the components to be compensated by the same screwing direction as the tightening screw. Subsequently, when the fastening screw is screwed in, the spacer may be screwed further into the anchor, resulting in a further reduction of the tolerance to be compensated by the tolerance compensation means. The disadvantage of this arrangement is therefore not only the number of parts, but also the way in which it is applied, which increases the working cycle time required to establish a connection between two components. In order to achieve independent axial tolerance compensation when the two parts are connected, the prior art proposes tolerance compensation arrangements that combine pairs of threads of different handedness with traction elements. For example, in EP2049807B1, DE102020216324A1, EP1780424A 1. In particular, integrating the traction means into two interconnected threaded sleeves having different thread pairs increases the difficulty in manufacturing such axial tolerance compensation means, since the traction elements are generally made of a different material than the threaded sleeves that need to be interconnected. Nevertheless, these devices have the advantage that they can be integrated into the connection process without any additional mounting effort, since the tolerance compensation device can compensate for the distance between the two components in an auxiliary, independent and subsequently mechanically loadable manner when the components spaced from one another are fixed. The european patent EP1304489B1 further simplifies this known axial tolerance compensation device with automatic tolerance compensation, just as the disclosed tolerance compensation device consists of only a screw, a nut and a compensation bushing. The screw, nut and compensation bushing are configured with a right-handed thread pair and a left-handed thread pair. In addition, the compensation bushing includes a clamping portion that forms a friction fit with the screw. This measure results in the screw first of all, due to the friction fit, bringing the compensation bush into common rotation, so that it is screwed out of the nut counter to the insertion direction, until the compensation bush abuts the first component after the tolerance compensation has been completed. Thereafter, the screw is directly or indirectly screwed into the nut while overcoming the friction fit. The advantage of this construction is therefore that no additional traction elements (for example made of other materials) need to be integrated into the tolerance compensation device during the manufacturing process. Instead, the tolerance compensating device is made of metal and can be manufactured in one piece. Howe