DE102012006524A1 - Screw assembly used for fixing of components in motor car, has screw that is set in pre-fixed state with threaded end of bottom of guide element and is projected from guide element central bore pre-fixed in rubber-elastic material - Google Patents

Abstract

The screw assembly (1) has a guide element (4) that is made of elastomeric material. The guide element is provided with top surface (6) and bottom surface (7). A screw (3) is set in pre-fixed state with the threaded end (8) of the bottom surface of the guide element, and is projected from a central bore (9) of the guide element. The central bore is pre-fixed in the rubber-elastic material. A screw head (10) is merged into a helical rim (11). A spacer (12) is arranged between screw rim and the top surface of the guide element.

Description

It is described a screw with a guide element, wherein the guide element is made of rubber-elastic material. In addition, the guide element has an upper side and a lower side.

From the publication DE 10 2008 041 411 A1 is a screw with a gasket assembly known. The screw axis defines a shaft which at least partially carries a thread and at one end of which a head is arranged. The sealing disk assembly is seated on the shaft and has at least one sealing disk and a stiffening disk, wherein the stiffening disk has a thickness and the sealing disk arrangement has an overall thickness. The gasket assembly is spaced along the screw axis a minimum distance from a shaft-facing bottom of the head, wherein the minimum distance is greater than the thickness of the stiffening plate and smaller than the total thickness of the gasket assembly.

A disadvantage of this seal assembly is that the seal assembly does not in any way serve to guide the screw, but rather the insertion of the screw in a corresponding thread of an abutment due to the complexity and awkwardness of the screw shaft, stiffener and washer assembly inserting the screw into a thread Abutment difficult.

An object is to provide a screw with a guide element which has a Schraubenvorfixierung and facilitates the installation of a screw connection between a thread of an abutment and the guide element.

This object is achieved with the subject matter of independent claim 1. Advantageous developments of the application will become apparent from the dependent claims.

With one embodiment of the invention, a screw with a guide element is provided. The guide element has an upper side and a lower side. The screw protrudes in a prefixed state with a threaded end of the underside of the guide member and is pre-fixed in a central bore of the guide member in a rubber-elastic material.

Such a screw with guide element has the advantage that it can be easily and safely inserted into a thread of an abutment using the guide element, wherein the guide element not only leads the screw, but additionally can lead to be connected to the abutment component of a vehicle to the abutment So that a fitter or a production machine does not have to hold three parts to be joined together, namely the guide element, the screw and the vehicle component, but by the pre-assembled screw in the guide element only two parts to be screwed together, namely the pre-fixed screw with the guide element and the vehicle component must lead to an abutment.

In one embodiment of the invention, the screw on a screw head, which merges into a screw rim, so that after tightening the screw in the abutment, the brim allows a large-area fixation of the guide element.

In addition, the screw rim has a further function, namely to hold a spacer in the axial direction between the screw rim and the top of the guide element for a further embodiment of the invention. A spacer between the screw rim and the top of the guide member ensures that the screw can not be inserted arbitrarily deep in a Vorfixierung through the central bore of the guide member, so that a plurality of uniformly prepared and pre-fixed in guide elements screws can be fed to a screwing robot ,

In a further embodiment of the invention, it is provided that the guide element has an outer annular guide groove surrounding the guide element. Such a guide groove can preferably accommodate U-shaped fixing straps of a vehicle component. On the other hand, it is also possible to postpone the guide element of the annular guide groove on such U-shaped, protruding from a vehicle component tabs, and then fix the vehicle component using the guide member and the pre-fixed screw to corresponding abutments.

Several such pre-fixed screws with guide elements can be used as damping blocks in attaching a vehicle component. For this purpose, the U-shaped connecting elements of a vehicle component are engaged with the annular guide grooves of the guide elements. In addition to an application of the guide elements as damping blocks, it is also possible in a further embodiment of the invention to use a guide element as a joint block of a linkage and to bring the linkage with the annular guide groove in engagement. such Joint blocks made of a rubber-elastic material such as the guide element have the advantage that they work silenced, which has proven particularly in joints for windscreen wiper linkage and other moving parts.

It is also possible to use a plurality of guide elements to hold an outer or inner lining of the vehicle at a predetermined distance, wherein the lining has openings with which the annular grooves of the guide elements are engaged. The distance between the lining of corresponding abutments, for example, in a vehicle body is determined by the distance between the annular guide groove and the underside of the guide element.

Furthermore, it is provided that the diameter of the central bore is smaller than a thread outer diameter of the screw. By this measure it is achieved that when screwing the screw in the central threadless bore of the guide element made of rubber-elastic material, the thread of the screw in the central bore displaces so much material that the screw is sufficiently pre-fixed and aligned by the rubber-elastic material in the central bore and kept.

In a further embodiment of the invention, it is provided that the central bore has at least one radially and axially extending slot. The axial length and the radial width of the slot is adapted to the length and the width of the spacer, so that the corresponding spacer in the at least one slot can be inserted. This ensures that the spacer is taken when screwing the screw into a thread of an abutment of the slot of the guide element and disappears in the guide element.

In this case, a thin membrane, which is connected transversely to the surface of the guide element with the spacer, which is formed for example as at least one web. The arranged on the underside of the at least one web membrane can ensure that on the one hand defines the spacer as such, the pre-fixing to a predefined length of the screw, and on the other hand that when screwing the screw into the thread of an abutment, the membrane ruptures and the distance holding at least a bridge can be inserted into the at least one slot and is no longer visible in the screwed-in state of the screw.

Instead of only one slot, a plurality of slots distributed around the circumference may be arranged around the central bore of the guide element. A correspondingly adapted number of webs can be integrally connected to a membrane in order to first set the defined distance of the pre-fixing and later to disappear in the slots of the guide element tearing open the membrane.

For this purpose, the radial width of the slots and the axial length of the guide element is slightly larger than the radial width and the axial length of the webs of the spacer. In addition, the positioning of the lands on the membrane is prepared to match the positions of the slots.

In a further embodiment of the invention, it is provided that the spacer has a conical spacer sleeve, which is adapted with its upper annular edge to the outer diameter of the screw rim and is supported with its lower edge on the upper side of the guide element.

Such a conical spacer sleeve has the advantage that when screwing the pre-fixed screw with guide element in the thread of an abutment, the conical spacer sleeve can be deformed into a seal. A prerequisite for such a deformation to a seal is that the spacer sleeve is made similar to the guide element of a rubber-elastic material, so that when screwing the pre-fixed screw into a thread of an abutment, the spacer sleeve is compressible to a sealing ring on the top of the guide element.

As already mentioned above, it is provided that such a screw is used with guide element for fastening components in a motor vehicle.

Embodiments of the invention will now be described by way of example with reference to the accompanying drawings.

1 shows a schematic cross section through a first arrangement with a pre-fixed screw and a guide element according to a first embodiment of the invention;

2 shows a schematic cross section through the arrangement according to 1 after inserting the screws into a thread of an abutment;

3 shows a schematic cross section along the section line BB of Figure 4 by a second arrangement of a pre-fixed screw and a guide member according to a second embodiment of the invention;

4 shows a schematic cross section along the section line AA of 3 by the second arrangement according to 3 ;

5 shows a schematic cross section along the section line CC of 4 by the screw with guide element according to 3 ;

6 shows a schematic cross section through the screw with guide element according to 5 after inserting the screw into a thread of an abutment;

7 shows an application example of a pre-fixed screw with guide element for fastening a vehicle component;

8th shows the application example according to 7 after attaching the vehicle component to threads of abutments of a vehicle body.

1 shows a schematic cross section through a first arrangement 1 with a pre-fixed screw 3 and a guide element 4 according to a first embodiment of the invention. The guide element 4 is made of a rubber-elastic material such as an elastomer or a hard rubber. The guide element 4 has a central unthreaded hole 9 with a diameter D _B and an axis 22 on, in which the screw 3 is introduced prefixed with its outer thread diameter D _G. In this case, the outer thread diameter D _{G is} greater than the inner diameter D _{B of} the unthreaded central bore 9 of the guide element 4 , In the prefixed state of the screw 3 in the guide element 4 a threaded end 8th the screw 3 to a bottom 7 of the guide element 4 from the central hole 9 out. For this purpose, the guide element 4 a cylindrical recess 38 on the bottom 7 on, making the outstanding threaded end 8th the screw 3 is protected from damage in the prefixed state.

The in the guide element 4 pre-fixed screw 3 has a screw head 10 put in a screw-thread 11 merges with an outer diameter D _A. Between the screw rim 11 and a top 6 of the guide element 4 is a tapered spacer sleeve 24 as a spacer 12 arranged. The spacer sleeve 24 has an upper annular edge 25 on, on which the screw rim 11 rests. With a lower annular rim 26 supports the spacer sleeve 24 on the top 6 of the guide element 4 from, with the guide sleeve 4 to the lower annular edge 26 rejuvenated. This thin-walled spacer sleeve 24 defines the length of the threaded end 8th that from the bottom 7 of the guide element 4 protrudes.

The guide element 4 has an annular guide groove 13 on. The annular guide groove 13 is in a stepped cylinder jacket 39 of the guide element 4 at a distance a from the bottom 7 of the guide element 4 arranged. An example fork-shaped holder or in 7 and 8th shown U-shaped connecting element 29 a vehicle component 28 can with the guide groove 13 be engaged to this vehicle component 28 for example, on an abutment 31 one in 2 shown vehicle body 33 over the screw 3 and the guide element 4 to install.

In addition shows 2 a schematic cross section through the arrangement 1 according to 1 after inserting the screw 3 in a thread 32 an abutment 31 a vehicle body 33 , Components with the same functions as in 1 be in the following 2 to 8th denoted by the same reference numerals and not discussed separately.

When screwing in the screw 3 in the thread 32 of the abutment 31 with its threaded end 8th at the same time the conical spacer sleeve 24 made of a rubber-elastic material through the screw rim 11 the screw 3 spread apart and on the top 6 of the guide element 4 pressed, leaving a sealing ring 27 at the lower annular edge 26 the conical spacer sleeve 24 between the screw rim 11 and the top 6 of the guide element is formed.

3 shows a schematic cross section along the section line BB of 4 by a second arrangement 2 a pre-fixed screw 3 and a guide element 5 according to a second embodiment of the invention, in this second embodiment is as a spacer 12 between the screw rim 11 and the top 6 of the guide element 5 a construction of webs 18 and 19 and a membrane 23 intended. This is indicated by the top 6 of the guide element 4 a central cylindrical recess 40 on, in which the membrane 23 with the jetties 18 and 19 is aligned and guided.

The membrane 23 is a thin connecting layer of the undersides of the webs 18 and 19 and prevents sinking of the webs 18 and 19 in appropriately provided slots 14 and 15 , in the 4 along the cutting plane AA the 3 to be shown. Using the membrane 23 that are integral with the bars 18 and 19 connected is the screw 3 only for a limited length in the guide element 5 prefixed.

4 shows a schematic cross section along the section line AA of 3 through the second arrangement 2 according to 3 , As can be clearly seen, is in the center of the cylindrical guide element 5 the screw 3 prefixed. From the central hole 9 out four slots extend in the radial direction in this embodiment 14 . 15 . 16 and 17 in which four corresponding bars, of which in 3 the footbridges 18 and 19 be shown, with rupture of the thin membrane 23 are insertable.

5 shows a schematic cross section along the section line CC of 4 through the screw 3 with guide element 5 according to 3 , With this cross-sectional view it becomes clear that the webs 20 and 21 leading to the spacer 12 belong exactly over the slots 16 and 17 through the membrane 23 be held, leaving a threaded end 8th the screw 3 from the bottom 7 of the guide element 5 protrudes in a defined length. Only when a considerable pressure when screwing in the screw 3 for example, in a thread 32 an abutment 31 as 6 points to the footbridges 19 and 21 is exercised, the thin membrane ruptures 23 and the footbridges 20 and 21 can in the slots 16 and 17 penetration.

6 shows a schematic cross section through the screw 3 with guide element 6 according to 5 after inserting the screw 3 in a thread 32 an abutment 31 a vehicle body 33 , When screwing into the thread 32 tears, as already mentioned above, the thin membrane 23 which the webs 20 and 21 held in position and aligned. For this purpose, the axial length l of the webs 20 and 21 and its radial width b in relation to the dimensions of the slots in the guide element 4 so measured that the webs 20 and 21 completely in the guide element 5 can be accommodated and in a screwed state of the screw 3 , like it 6 shows are no longer visible.

The bridges 20 and 21 with the membrane 23 can for prefixing, like it 5 shows, as a spacer 12 between the screw rim 11 and the top 6 of the guide element 5 be used. In addition to an annular guide groove 13 are the top in both embodiments of the invention 6 and the back 7 of the guide element 6 with cylindrical recesses 38 and 40 provided in addition to the rubber elasticity of the guide element 5 to improve.

7 shows an application example of a pre-fixed screw with guide element 5 for securing a vehicle component 28 using a fastening device 30 , In this example, the vehicle component is 28 a windscreen wiper motor 41 , its drive shaft 34 a drive pulley 35 carries, which rotates in the direction of arrow A and thereby drive rods 36 and 37 for the wipers in directions A and B moved back and forth.

The windscreen wiper motor 41 has on a housing, for example, three on the circumference of the windshield wiper motor 41 distributed outer U-shaped fasteners 29 on, with the annular guide grooves 13 the guide elements 5 the pre-fixed screws 3 engage. In the 7 The situation shown only shows the placement of the screws 3 on appropriate thread 32 of abutments 31 in the vehicle body 33 , where the spacers 12 make sure the screws 3 in the guide elements 5 are pre-fixed. The distributed on the circumference three guide elements 5 are for a three-point suspension of the wiper motor 41 intended.

8th shows the application example according to 7 after attaching the vehicle component 28 using the guide elements 5 at the threads 32 the abutment 31 the vehicle body 33 , These are the outer U-shaped fasteners 29 with the guide grooves 13 the guide elements 5 engaged. The vehicle component 28 can then use the guide elements 5 on the vehicle body 33 be aligned so that in the guide elements 5 prefixed screw ends 8th with the threads 32 the abutment 31 aligned in the vehicle body.

Subsequently, the pre-fixed screws 3 with their threaded ends 8th in the thread 32 the abutment 31 screwed in and thus the vehicle component 28 be fixed spaced from the vehicle body. In this case, the guide elements form 5 vibration damping mounting blocks for the vehicle component 28 , By screwing in the screws 3 in the thread 32 the abutment 41 one rips the distance bridges 18 and 20 holding and aligning transverse thin membrane 23 on. The distance-retaining bars 18 and 20 then disappear completely into the slots provided 14 and 16 of the guide element 5 ,

Although at least one exemplary embodiment has been shown in the foregoing description, various changes and modifications may be made. Said embodiments are merely examples and are not intended to limit the scope, applicability or configuration of the screw with guide element in any way. Rather, the foregoing description provides those skilled in the art with a plan for practicing at least one exemplary embodiment of the lead screw with numerous changes in function and the arrangement of the screw with guide element of elements described in exemplary embodiments can be made without departing from the scope of the appended claims and their legal equivalents.

LIST OF REFERENCE NUMBERS

1

Arrangement of a screw with guide element (1st embodiment)

2

Arrangement of a screw with guide element (2nd embodiment)

3

screw

4

guide element

5

guide element

6

top

7

bottom

8th

Threaded end of the screw

9

drilling

10

screw head

11

screw brim

12

spacer

13

guide

14

Slot (radial)

15

slot

16

slot

17

slot

18

web

19

web

20

web

21

web

22

Axis of the hole

23

membrane

24

conical spacer sleeve

25

upper annular edge

26

lower annular edge

27

seal

28

vehicle component

29

U-shaped connecting element

30

fastening device

31

abutment

32

thread

33

vehicle body

34

drive shaft

35

sheave

36

drive rod

37

drive rod

38

recess

39

cylinder surface

40

recess

41

wiper motor

D _A

Outer diameter of the screw rim

D _B

Diameter of a central bore

D _G

Outer thread diameter

l

axial length

b

radial width

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008041411 A1 [0002]

Claims (15)

Screw with a guide element ( 4 . 5 ) of a rubber-elastic material having a top ( 6 ) and a bottom ( 7 ), wherein the screw ( 3 ) in a prefixed state with a threaded end ( 8th ) from the bottom ( 7 ) of the guide element ( 4 . 5 protruding from a central bore ( 9 ) of the guide element ( 4 . 5 ) is prefixed in the rubber-elastic material. Screw with guide element according to claim 1, wherein the screw ( 3 ) a screw head ( 10 ), which is in a screw rim ( 11 ) passes over. Screw with guide element according to claim 1 or claim 2, wherein between the screw rim ( 11 ) and the top ( 6 ) of the guide element ( 4 . 5 ) at least one spacer ( 12 ) is arranged. Screw with guide element according to one of claims 1 to 3, wherein the guide element ( 4 . 5 ) an outer, the guide element ( 4 . 5 ) surrounding, annular guide groove ( 13 ) having. Screw with guide element according to claim 4, wherein a plurality of guide elements ( 4 . 5 ) Damping blocks of a fastening device ( 30 ) of a vehicle component ( 28 ) and U-shaped connecting elements ( 29 ) of the vehicle component ( 28 ) with the annular guide grooves ( 13 ) of the guide elements ( 4 . 5 ) are engaged. Screw with guide element according to claim 4, wherein the guide element ( 4 . 5 ) is a joint block of a linkage and the linkage with the annular guide groove ( 13 ) is engaged. Screw with guide element according to claim 4, wherein a plurality of guide elements ( 4 . 5 ) hold a panel at a predetermined distance, wherein the panel has openings, with which the annular grooves ( 13 ) of the guide elements ( 4 . 5 ) are engaged. Screw with guide element with guide element according to one of the preceding claims, wherein the screw ( 3 ) in a thread ( 32 ) of an abutment ( 31 ) is screwed. Screw with guide element according to one of claims 1 to 8, wherein the diameter (D _B ) of the central bore is smaller than a thread outer diameter (D _G ) of the screw. Screw with guide element according to one of claims 3 to 9, wherein the central bore ( 9 ) at least one radially and axially extending slot ( 14 to 17 ), wherein the axial length (l) and the radial width (b) of the slot ( 14 to 17 ) the length and the width of a corresponding spacer ( 12 ) are adapted such that the corresponding spacer ( 12 ) in the at least one slot ( 14 to 17 ) can be inserted. Screw with guide element according to one of claims 1 to 7, wherein several on the circumference of the central bore ( 9 ) distributed radially and axially extending slots ( 14 to 17 ) are provided. Screw with guide element according to claim 11, wherein a plurality of radial width (b) and axial length (l) to the slots ( 14 to 17 ) adapted webs ( 18 to 21 ) as a spacer ( 12 ) are provided, which at a transversely to the axis ( 22 ) of the bore ( 9 ) aligned membrane ( 23 ) to match the positions of the slots ( 14 to 17 ) are fixed. Screw with guide element according to one of claims 3 to 9, wherein the spacer ( 12 ) a conical spacer sleeve ( 24 ), which with its upper annular edge ( 25 ) the outer diameter (D _A ) of the screw rim ( 11 ) and with its lower edge ( 26 ) on the top ( 6 ) of the guide element ( 4 . 5 ) is supported. Screw with guide element according to claim 10, wherein the spacer sleeve ( 24 ) has a rubber-elastic material which when screwing the pre-fixed screw ( 3 ) in a thread of an abutment to a sealing ring ( 27 ) on the top ( 6 ) of the guide element ( 4 . 5 ) is compressible together. Using a screw ( 3 ) with guide element ( 4 . 5 ) according to one of the preceding claims for fastening components in a motor vehicle.

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