Tolerance Equalizing Device

Abstract

The invention relates to an apparatus for compensating tolerances between two components to be connected to one another, comprising a threaded element fastenable to a first component; a threaded bolt that has a first threaded section, which is in a first threaded engagement with the threaded element, a bolt collar and a second threaded section; and a threaded nut which can be brought into a second threaded engagement with the second threaded section, wherein the first threaded engagement and the second threaded engagement are formed in opposite senses; and wherein a friction locking or a form fit between the threaded bolt and the threaded nut can be produced by the threaded nut such that the threaded bolt is movable relative to the threaded element when the threaded nut is screwed onto the second threaded section.

Claims

1. An apparatus for compensating tolerances between two components to be connected to one another, the apparatus comprising: a threaded element fastenable to a first component; a threaded bolt that has a first threaded section, which is in a first threaded engagement with the threaded element, a bolt collar and a second threaded section; and a threaded nut which can be brought into a second threaded engagement with the second threaded section, wherein the first threaded engagement and the second threaded engagement are formed in opposite senses; and wherein one of a friction locking and a form fit between the threaded bolt and the threaded nut can be produced by the threaded nut such that the threaded bolt is movable relative to the threaded element when the threaded nut is screwed onto the second threaded section.

2. The apparatus in accordance with claim 1, wherein the first threaded section forms a left-hand thread and the second threaded section forms a right-hand thread.

3. The apparatus in accordance with claim 1, wherein the first threaded section forms an external thread and the threaded element comprises a threaded bushing.

4. The apparatus in accordance with claim 1, wherein the first threaded section forms an internal thread and the threaded element comprises a stud bolt.

5. The apparatus in accordance with claim 1, wherein the bolt collar forms a contact surface for contact with the second component.

6. The apparatus in accordance with claim 5, wherein the contact surface of the bolt collar is planar.

7. The apparatus in accordance with claim 5, wherein the contact surface of the bolt collar is oriented at a right angle to a longitudinal central axis of the threaded bolt.

8. The apparatus in accordance with claim 5, wherein the contact surface of the bolt collar extends obliquely to a longitudinal central axis of the threaded bolt.

9. The apparatus in accordance with claim 5, wherein the contact surface is provided with a sealing element.

10. The apparatus in accordance with claim 5, wherein the threaded nut forms a contact surface for contact with the second component.

11. The apparatus in accordance with claim 10, wherein the contact surface of the threaded nut is oriented at a right angle to a longitudinal central axis of the threaded bolt.

12. The apparatus in accordance with claim 10, wherein the contact surface of the threaded nut extends obliquely to a longitudinal central axis of the threaded bolt.

13. The apparatus in accordance with claim 10, wherein the contact surface of the threaded nut is formed by a radially outwardly projecting collar.

14. The apparatus in accordance with claim 1, wherein the threaded nut is one of a standard nut and a self-locking nut.

15. The apparatus in accordance with claim 1, wherein the threaded nut has a friction element for producing a friction locking between the threaded bolt and the threaded nut.

16. The apparatus in accordance with claim 15, wherein an internal thread of the threaded is arranged in a section facing the bolt collar and the friction element is arranged in a section of the threaded nut remote from the bolt collar.

17. The apparatus in accordance with claim 15, wherein the friction element is a spring element.

18. The apparatus in accordance with claim 1, further comprising a transport securing device for securing the threaded bolt which is at least approximately screwed to a maximum together with the threaded element.

19. The apparatus in accordance with claim 18, wherein the transport securing device comprises a first latching means formed at the threaded element; and a corresponding second latching means formed at the bolt collar.

20. The apparatus in accordance with claim 18, wherein the threaded bolt is screwed tight to the threaded element in order to form the transport securing device.

21. The apparatus in accordance with claim 1, wherein the threaded bolt is provided with an engagement feature.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The invention will be described in the following purely by way of example with reference to a possible embodiment and to the enclosed drawing. There are shown:

[0029] FIG. 1 an exploded view of a tolerance compensation apparatus in accordance with a first embodiment of the invention;

[0030] FIG. 2 a perspective view of a threaded nut of the tolerance compensation apparatus of FIG. 1;

[0031] FIG. 3A a sectional view of the tolerance compensation apparatus of FIG. 1 before the connection of two components;

[0032] FIG. 3B a sectional view of the tolerance compensation apparatus of FIG. 1 during the connection of two components;

[0033] FIG. 4 an exploded view of a tolerance compensation apparatus in accordance with a second embodiment of the invention;

[0034] FIG. 5A a sectional view of the tolerance compensation apparatus of FIG. 4 before the connection of two components; and

[0035] FIG. 5B a sectional view of the tolerance compensation apparatus of FIG. 4 during the connection of two components.

DETAILED DESCRIPTION

[0036] The first embodiment of a tolerance compensation apparatus shown in FIGS. 1 to 3 comprises a threaded element in the form of a threaded bushing 10; a threaded bolt 12; and a threaded nut 14 having a friction element 16.

[0037] The threaded bushing 10 is substantially cylindrical and has a radially outwardly projecting flange 18, which could, however, generally also be omitted, at its end face which faces the threaded nut 14 and which is the upper end face in the Figures. Furthermore, the threaded bushing 10 forms a left-hand internal thread 20.

[0038] The threaded bolt 12 has a left-hand first threaded section 22, which is adapted to the internal thread 20 of the threaded bushing 10, and a right-hand second threaded section 24. The first threaded section 22 and the second threaded section 24 each form an external thread and are separated from one another by a radially outwardly projecting disk-shaped bolt collar 26. In the region of its end adjacent to the second threaded section 24, the threaded bolt 12 is provided with an engagement feature 28, here in the form of an external hexagon, which facilitates the screwing of the threaded bolt 12 into the threaded bushing 10.

[0039] In the embodiment shown, the threaded nut 14 has a radially outwardly projecting collar 30 at its end face which faces the threaded bushing 10 and which is the lower end face in the Figures. In general, a threaded nut without a collar could, however, also be used.

[0040] In addition, the threaded nut 14 forms, in a lower part, a right-hand internal thread 32 adapted to the second threaded section 24 of the threaded bolt 12, whereas the friction element 16 is rotationally fixedly received in an upper part of the threaded nut 14. The friction element 16 is formed from a spring metal sheet bent over in a U shape in order to form an increased friction locking with the threaded bolt 12 when the threaded nut 14 is screwed sufficiently far onto the threaded bolt 12.

[0041] The tolerance compensation apparatus serves to connect two components 34, 36 (FIG. 3), for example, for the attachment of a headlamp to a support structure of a motor vehicle provided for this purpose. In this respect, the tolerance compensation apparatus is used as follows:

[0042] First, the threaded bushing 10 is fixed in a first component 34, for example, pressed into, glued into, injected into, clipped into or screwed into the first component 34. Then, the first threaded section 22 of the threaded bolt 12 is screwed into the threaded bushing 10, and indeed so far until the lower side of the bolt collar 26 comes at least approximately into contact with the flange 18 of the threaded bushing 10. It is understood that it is generally also possible to first screw the threaded bolt 12 into the threaded bushing 10 and then to insert the threaded bushing 10 together with the threaded bolt 12 into the first component 34.

[0043] To prevent the threaded bolt 12, which is at least approximately completely screwed into the threaded bushing 10, from unintentionally unscrewing from the threaded bushing 10, corresponding latching means 38, 40 are provided at the flange 18 and at the bolt collar 26 to form a transport securing device. In the present embodiment, the latching means 38, 40 are designed in the form of projections, wherein the projection 38 of the flange 18 is in the way of the projection 40 of the bolt collar 26, viewed in the unscrewing direction. The projection 40 of the bolt collar 26 is a rigid projection here, whereas the projection 38 of the flange 18 has a certain flexibility so that it can evade the projection 40 of the bolt collar 26 when the threaded bolt 12 is rotated by a sufficiently large torque. It is understood that other embodiments of the transport securing device can also be considered.

[0044] Next, the first component 34 provided with the threaded bushing 10 and with the threaded bolt 12 is attached to the second component 36 such that the second threaded section 24 of the threaded bolt 12 projects through a bore 42 of the second component 36 provided for this purpose.

[0045] To connect the components 34, 36, the threaded nut 14 is subsequently screwed onto the second threaded section 24 of the threaded bolt 12 which projects through the bore 42 of the second component 36. This screwing process takes place relatively easily during a first phase, namely while the internal thread 32 of the threaded nut 14 is brought into engagement with the second threaded section 24 of the threaded bolt 12. However, when the threaded bolt 12 has penetrated far enough into the threaded nut 14, it comes into contact with the friction element 16, whereby an increased friction locking is produced between the threaded bolt 12 and the threaded nut 14 and has the effect that the threaded bolt 12 is taken along by the threaded nut 14 and is unscrewed from the threaded bushing 10.

[0046] On a continued rotation of the threaded nut 14, the threaded bolt 12 is moved so far out of the threaded bushing 10 until the bolt collar 26 comes into contact with the second component 36 and prevents a further rotation of the threaded bolt 12. As soon as the movement of the threaded bolt 12 is blocked, the threaded nut 14 is tightened by applying a torque which is sufficiently high to overcome the friction locking, increased by the friction element 16, between the threaded bolt 12 and the threaded nut 14 in order to ultimately clamp the second component 36 between the bolt collar 26 and the threaded nut 14, and via the threaded bolt 12 and the threaded bushing 10, to the first component 34, wherein the maintenance of the spacing between the first component 34 and the second component 36 is ensured by the extended threaded bolt 12.

[0047] In the present embodiment, a contact surface 44 of the bolt collar 26 provided for contact with the second component 36 extends in a planar manner and substantially orthogonally to a longitudinal central axis of the threaded bolt 12. However, such a planar contact surface 44 could also be tilted slightly, i.e. by a few angular degrees, with respect to a plane orthogonal to the longitudinal central axis of the threaded bolt 12 in order to provide an additional clamping of the components 34, 36. It is furthermore understood that the contact surface 44 of the bolt collar 26 does not necessarily have to be planar, but can generally also have a curved contour adapted to the contour of the second component 36.

[0048] In FIGS. 4 and 5, a second embodiment of a tolerance compensation apparatus in accordance with the invention is shown which is functionally identical to the first embodiment described above and only differs therefrom in the design features described in the following.

[0049] First, the threaded element of the second embodiment is not designed in the form of a threaded bushing 10, but rather in the form of a stud bolt 46 which is rotationally fixedly attached to the first component 34 and which has an external thread 48.

[0050] Correspondingly, the threaded bolt 12 of the second embodiment has an axial threaded bore 50 which forms a first threaded section 22, here in the form of an internal thread, adapted to the external thread 48 of the stud bolt 46. The threaded bore 50 extends from an end face of the threaded bolt 12 facing the first component 34 so far into the threaded bolt 12 that the first threaded section 22 of the threaded bolt 12 partly overlaps the second threaded section 24, which is also configured as an external thread here, viewed in the axial direction.

[0051] Unlike in the first embodiment, the first threaded section 22 and the second threaded section 24 of the threaded bolt 12 are not separated from one another by the bolt collar 26 in accordance with the second embodiment. Instead, the bolt collar 26 is here arranged in the region of the end of the threaded bolt 12 facing the first component 34, and indeed such that it contacts the first component 34 when the threaded bolt 12 is completely screwed onto the stud bolt 46.

[0052] In a further difference from the first embodiment, the threaded bolt 12 in accordance with the second embodiment does not have an outwardly disposed engagement feature 28 in the region of its end remote from the first component 34, but rather has an inwardly disposed engagement feature 28, here specifically in the form of a hexagon socket.

REFERENCE NUMERAL LIST

[0053] 10 threaded bushing

[0054] 12 threaded bolt

[0055] 14 threaded nut

[0056] 16 friction element

[0057] 18 flange

[0058] 20 internal thread

[0059] 22 first threaded section

[0060] 24 second threaded section

[0061] 26 bolt collar

[0062] 28 engagement feature

[0063] 30 collar

[0064] 32 internal thread

[0065] 34 first component

[0066] 36 second component

[0067] 38 latching means

[0068] 40 latching means

[0069] 42 bore

[0070] 44 contact surface

[0071] 46 stud bolt

[0072] 48 external thread

[0073] 50 threaded bore