DE202005018483U1 - Bearing cap mounting arrangement for motor vehicle, has through boring formed larger than peg such that peg does not contact edge of boring, and positioning openings provided at distance to mounting point for contacting cap at support - Google Patents

Abstract

The arrangement has a through boring formed in a mounting point (49) in a support (1), and a drive unit arranged in a front side of the through boring. The through boring is formed larger than a peg such that the peg does not contact an edge of the through boring. Two positioning openings (20, 21) are provided at a distance to the mounting point for contacting a bearing cap at the support in a form-fit manner to position the bearing cap at the support against twisting.

Description

Territory of invention

The The present invention relates to an arrangement for attaching a made of plastic component of an adjustment for motor vehicles on a vehicle-mounted carrier according to the generic term of claim 1.

background the invention

Such a fastening arrangement is known from DE 196 19 087 A1 the applicant known. At at least one attachment point, a through hole is formed on the carrier (for example, a door inner panel or door module carrier). At the end facing away from the component of the through hole, a second component consisting of plastic is arranged, wherein one of the two components has a pin which projects through the associated through hole into a receptacle provided in the other component. The two components are connected to one another with a plastic screw acting as a connecting means such that the carrier is clamped between the two components.

With Such a fastening arrangement are usually adjusting devices attached to supporting parts of the vehicle body. by virtue of the existing tolerances are at an actuation of the drive motor of the Adjustment by the caused torque unpleasant acoustic banging or rattling noises generated, which is undesirable and also at an early age Wear leads.

to Elimination of this disadvantage is attempted in the prior art, the by tolerances of the projections and holes the two components and the third part generated game to eliminate. For this purpose can for example, on the outer contour the projections or dome scraper be attached, which is expensive. Another approach To eliminate the game is that for the production of Plastic components used to provide tools with the highest precision, which is significantly higher Production costs leads and thus undesirable is.

The aforementioned game leads after prolonged use to a leaking of the connection, what to avoid as well applies.

Summary the invention

task The present invention is an easy to install and inexpensive To provide a fastening arrangement, with the one made of a plastic existing component essentially free of play on a body-fixed carrier can be attached.

These and further objects are according to the present Invention by a fastening arrangement or fastening device solved with the features of claim 1. Further embodiments according to the invention are the subject of the referenced Dependent claims.

According to the invention carrier held between the two components, in particular clamped, that provided or formed on one of the two components Pin does not touch an edge of the through hole. For that purpose that is respective through-hole larger, preferably significantly larger, trained as the cone. The distance between the pin and the edge of the Through hole is dimensioned so that one in continuous use For example, an up-building game does not continue to be an immediate contact between the pin and the edge of the through hole leads, about in the case of a load change or if the adjustment in a lower or upper end position moves. According to the invention can so disturbing Sounds, for example, rattling noises, and an early one Wear avoided become. Furthermore, comparatively roughly tolerated fastening means, such as through holes and to these corresponding pin or dome, advantageously simple and cost-effective manufacture.

According to the invention is a exact positioning of the device by the positive engagement of the device in the carrier at least two positive locking areas, each spaced from the at least one attachment point are provided achieved. For this purpose, at least one of the positive-locking regions is preferred a form-locking area, tight tolerated by an exact positioning to achieve, so that the component in the positive connection area in Essentially free of play is stored. To secure the device against twisting or adjusting relative to the carrier, such as in the case of a load change of the adjustment, is at least Another form-fitting area designed so that in interaction with the positive locking Intervention in the tightly toleranced positive connection area a fuse is achieved against rotation or adjustment. Will the device after prolonged Use, for example, replaced, so may a new component Precisely positioned at the first interlocking region and in interaction be exactly aligned with the other form-locking area. A renewed elaborate Adjustment of the mounting arrangement is not necessary.

There the connection with the other component not to the for positioning serving positive-locking areas but at the attachment points, The positioning is not due to the connection of the two components influenced himself. Any aging processes of the plastic, the for shrinkage and deformation under the influence of temperature to lead, to lead thus not to a change the positioning. Even if the connection through such aging processes is loosened, continue to be suppressed disturbing noise, because the pins at the attachment points always spaced from the inner edge of the through hole are arranged.

According to one another embodiment If the positive-locking areas are closed, they have this so no through holes or through holes, allowing a passage of moisture through the carrier can be excluded in the positive-locking areas. A wet room / dry room separation can be so reliable be accomplished.

to Formation of the form-fitting regions can according to a further embodiment on the carrier projections or recesses may be formed or molded and may the component formed corresponding recesses or projections formed or be molded. These structures can be formed by custom forming a metal or plastic or, for example, by molding a plastic structure to be provided.

For precise positioning is in at least one positive-locking region, preferably in a positive-locking region, the projection is snugly received in the recess of the component or the recess takes the projection of the device close fitting on. Thus, the device is substantially in the positive engagement region free of play on the carrier stored. This can basically be done by high-precision Training of the two cooperating form-fitting structure be accomplished.

According to one preferred further embodiment However, such a close tolerance by suitable design achieved, so that even in the case of tolerances automatically precise positioning can be achieved. For this purpose, for example, the projection be frustoconical or conical and the associated Hole with a smaller diameter than at the base of the truncated cone or conical projection to be formed. Or the lead can with straight peripheral walls be formed with inner peripheral walls of a frustoconical Collaborate holes. Or the projection and the side walls of the assigned bore are different bevelled or domed educated.

According to one another embodiment a play-free storage on the carrier is realized by that formed on the circumference of the protrusion molded webs or scraper ribs or are formed by an inner peripheral wall of the recess or depression pressed so be that precise the component is positioned.

All in all can thus according to the invention both the attachment points as well as in the form-fitting areas together acting structures with comparatively large tolerances produced, resulting in significantly lower production costs and material costs. The inventive approach is thus based, in particular, on a departure from the customary practice Approach, hence the mounting holes for exact positioning of the component just as possible must be formed with low tolerances.

The The aforementioned positive-locking areas can be used separately and independently Provided or designed areas that a penetration of a Functional element by the carrier serve, for example, the penetration of a cable drum of a rope window regulator or an axle for supporting such a cable drum by a in the carrier trained passage opening. According to others variants of course such a positive-locking region is provided at an area be formed, the penetration of such a functional element through the carrier serves.

LIST OF FIGURES

following the invention will be described by way of example and with reference on the attached Drawings are described, resulting in more features, benefits and to be solved Tasks will result. Show it:

1 in a partial top view of a mounting arrangement according to the present invention for attaching the drive and transmission unit of a cable window lifter including the cable drum housing to a door module carrier;

2 the fastening arrangement according to the 1 in a schematic partial section along the line AA according to the 1 ;

3a in a schematic partial section a positive connection region of the fastening arrangement according to the 1 ; and

3b in an enlarged view an attachment point of the fastening arrangement according to the 2 ,

In the figures denote identical reference numerals identical or Substantially equal elements or groups of elements.

Detailed description of preferred embodiments

The 1 shows an example of the attachment of a drive and transmission unit of a cable window lifter to a flat support made of steel or plastic, which can be installed, for example as a door module carrier in a motor vehicle door. In the 1 is the attachment of a cable drum housing 30 having bearing cap 3 on the carrier 1 recognizable. In the cable drum housing 30 is on the axis 31 a rope drum 8th (see. 2 ) rotatably mounted, on the outer circumference of a rope is wound up and unwound over the two Seileinlaufbereiche 33 essentially runs tangentially on the cable drum and is discharged from this. stiffening ribs 32 serve to stiffen the bearing cap 3 ,

According to the 2 is the drive and gear unit 4 on the opposite side of the vehicle 1 arranged. This includes a gear housing 40 in which a through-hole in the arched storage area 2 of the carrier 1 powerful gear for driving the cable drum 8th is included, as well as a motor housing 41 in which a motor 42 is added to drive the transmission and the cable drum. The motor housing 41 , the gearbox 40 and the bearing cap 3 are preferably formed from a plastic, in particular by an injection molding process. drive unit 4 and bearing cap 3 are according to the 1 at three attachment points 49 connected together, which span an isosceles or equilateral triangle. The attachment of the bearing cap 3 on the carrier 1 is described below on the basis of 2 and 3b be described in more detail.

According to the 2 is at the respective attachment point on the carrier 1 a through hole formed on the lower side in the 2 the bearing cap 3 is arranged. At the bearing cap 3 remote from the end face of the through hole, the drive unit is arranged, the housing 40 is formed of a plastic. At the attachment point is in the bearing cap 3 a cone 36 formed integrally, the through hole in the carrier 1 passes through and into one in the housing 40 the drive unit 4 trained receptacle protrudes. According to the 2 is the pin 36 formed substantially cylindrical and is the associated receptacle 44 formed substantially hollow cylindrical, with a larger inner diameter than the outer diameter of the pin 36 , In the cone 36 is a through hole 37 formed in which a connecting means (not shown) for connecting the bearing cap 3 with the drive unit 4 is included. As a connecting means according to the invention, in particular a plastic screw can be used, which in an internal thread of the pin 36 screwed in and tightened so tightly that the wearer 1 between the bearing cap 3 and the transmission housing 40 is trapped. In any case, this clamping is sufficient to allow passage of water or moisture through the carrier 1 to prevent. However, according to the invention, this clamping need not in principle be so strong that a mechanical positional fixation of the bearing cap or of the gearbox housing also results from this 40 on the carrier 1 is achieved. With the plastic screw (not shown) can be achieved according to embodiments also a very large tightening torque, so that where the head of the plastic screw and the bearing cap 3 abut one another, a correspondingly large surface pressure acts.

According to the 3b is the inner diameter of the through hole in the carrier plate 1 at the attachment point larger than the outer diameter of the pin 36 , In the assembled state, therefore, lies the outer contour of the pin 36 not directly on the edge of the through hole. The difference between the diameter of through hole and pin is dimensioned so that even in the case of load changes or when the rope window drive in the upper or lower block, especially taking into account a relative movement of the bearing cap 3 / Transmission case 40 and the trapped carrier 1 , the cone 36 continue to device not to the inner edge of the through hole device. Thus disturbing rattling noises can be avoided according to the invention.

Again 3b can be removed, the recording 37 for the connecting means as a blind hole in the pin 36 be formed, in which case the connecting means is to be introduced from the side of the transmission housing ago. As will be readily apparent to those skilled in the art, the pin can also be used in the connecting portion 43 of the gearbox 40 be formed or formed and be formed the corresponding receptacle in the bearing cap.

By means of the attachment points described above is the bearing cap 3 on the carrier 1 attached. The attachment becomes the carrier 1 between the plastic housings 3 . 40 firmly pinched. The two plastic components reactie in the same way on temperature effects and aging, so that the connection remains permanently stable. A loosening of the compound by flowing the plastic is thus largely eliminated. This allows a durable and stable attachment of the bearing cap 3 on the carrier 1 will be realized. For precise positioning serve according to the invention at least two positive locking areas, which are provided at a distance from the aforementioned attachment points. These positive locking areas prevent a relative movement of the bearing cap 3 relative to the carrier 1 In the example of the cable window lifter of this embodiment, therefore, a rotation of the drum cover receiving the drum cover 3 , for example in the case of a load change of the engine. As the bearing cap 3 on the carrier 1 firmly and permanently fixed stable, the positive-locking areas can also be made relatively weak, there to secure the positioning of the bearing cap 3 only comparatively small forces must be expended. Hereinafter, the configuration of the positive-locking regions will be described by way of example with reference to FIG 1 and 3a be explained in more detail.

According to the 1 are in the bearing cap 3 two openings 20 . 21 for holding pegs 10 trained, namely a round hole 20 and an oval slot 21 , According to the 1 tension the attachment points 49 an isosceles or equilateral triangle. The openings 20 . 21 are arranged outside the triangle. In the 1 forms an imaginary connecting line of the two right attachment points 49 the base of the triangle. Visible are the two openings 20 . 21 arranged mirror-symmetrically to a bisector perpendicular to the base of this triangle. The positive locking areas are thus according to the symmetry of the bearing cap 3 arranged, the cable inlet areas 33 also mirror-symmetrical to the aforementioned mid-perpendicular. This leads to a symmetrical power dissipation and to minimal, acting on the positive-locking forces.

According to the 1 is the one in the carrier 1 trained or molded Dom 10 close fitting in the round hole 20 so that the bearing cap in the area of the round hole 20 essentially free of play on the carrier 1 is stored. In the other form-fitting area is the slot 21 however, in a first direction compared to the dimensions of the carrier 1 trained or molded on this dome 10 large and designed in a second direction, perpendicular to the first direction, tight tolerated. According to the 1 is the cathedral 10 cylindrically formed in the second positive engagement region, wherein the sides of the dome 10 directly on the long sides of the slot 21 issue. In this way, a rotation of the bearing cap 3 around the positive-locking area acting as a fulcrum 20 prevented. Due to the comparatively large tolerance of the slot 21 in the first direction unavoidable manufacturing tolerances are compensated, so that the bearing cap 3 always exactly and without play on the carrier 1 is secured. According to the 1 which runs through a dashed line 22 indicated longitudinal axis of the slot 21 at a non-zero angle relative to a perpendicular to an imaginary connecting line R between the centers of the domes 10 , In other words, the small semi-axis of the elliptical through-hole 21 extends at a non-vanishing angle relative to a tangent to an imaginary circle about the center of the first positive engagement region 20 around, with a radius equal to the distance between the two centers of the dome 10 corresponds (in the 1 denoted by the reference R). A shift in the position of the slot 21 relative to the tightly tolerated round hole 20 , for example, due to manufacturing tolerances, thus leads to a shift of the narrowest point of the slot 21 What a lesser game of bearing cap 3 on the carrier sheet 1 provides. In other words, the positive-locking areas can be tolerated relatively coarse and yet can be a very precise and backlash-free storage of the bearing cap 3 on the carrier 1 will be realized.

According to a further embodiment (not shown), the longitudinal axis of the oblong hole at a non-vanishing angle relative to a perpendicular to an imaginary connecting line between the axis of the cable drum housing (reference numeral 31 in the 1 ) and the center of the in the second positive engagement region (reference numeral 21 in the 1 ) received dome (reference numeral 10 in the 1 ). In other words, according to this embodiment, the small semi-axis of the elliptical through-hole may also extend at a non-vanishing angle relative to a tangent to an imaginary circle around the axis of the cable drum housing, with a radius equal to the distance between the axis of the cable drum housing and extend the center of the recorded in the second form-fitting region cathedral. A shift in the position of the slot relative to the axis of the cable drum housing, such as due to load changes or retraction of the cable window lifter in an upper or lower block, thus resulting in a shift of the narrowest point of the slot, thus providing even less clearance of the bearing cap the support plate provides.

The 3a shows a positive connection region in an enlarged cross-section. According to the 3a is the cathedral 10 directly in the carrier 1 formed, for example by forming a metal sheet or by suitable injection molding egg nes plastic carrier. According to the 3a is the outer contour 11 of the cathedral 10 cylindrically shaped and is the inner peripheral wall 35 the through hole in the bearing cap 3 also cylindrical. cathedral 10 and through hole of the bearing cap 3 are tightly tolerated, so the dome 10 is snugly received in the through hole.

According to further alternative embodiments (not shown), the dome 10 be formed frustoconical or conical and the inner diameter of the through hole may be smaller than the diameter of the dome 10 be at the base. Or the cathedral 10 may be cylindrical to engage in tapered inner edges of the through-hole. Or the cathedral 10 and the inner edge of the through hole may be formed differently tapered or curved.

According to a further embodiment, on the outer contour 11 of the cathedral 10 Also integrally formed webs or scraper ribs may be provided which, when engaged in the through hole of the bearing cap 3 deformed, in particular compressed or partially scraped until the cathedral 10 is snugly received in the through hole. Of course, such molded webs or scraper ribs according to the invention can also be combined with conical through holes.

In case of a possible defect of the drive motor of the window lift this can be easily from the carrier 1 remove, according to the 2 the plastic screw loosened and the drive unit 4 from the carrier 1 is removed. The window motor can then be repaired and replaced with a new motor. In this case, the bearing cap 3 due to the separately provided form-fitting regions continue to be precise on the carrier 1 stay positioned. For temporary securing of the bearing cap 3 on the carrier 1 can on the pin 36 Detent elements or the like may be provided, which is the edge of the through hole of the wearer 1 reach behind and act as a captive. After replacing the engine, the drive unit 4 in the manner described above again with the bearing cap 3 get connected. This does not affect the positioning of the bearing cap 3 on the carrier 1 ,

1

Support plate / door module carrier

2

Arched storage area

3

bearing cap

4

drive unit

8th

cable drum

10

cathedral

11

Outside contour of the cathedral 10

20

First positioning opening

21

Second positioning opening

22

Longitudinal axis of the second positioning opening 21

30

Cable drum housing

31

axis

32

stiffening ribs

33

Cable inlet area

34

Bowden tube support

35

edge the positioning hole

36

Pin / Cathedral

37

admission

38

Outer contour of the pin 36

40

gearbox

41

motor housing

42

engine

43

connecting portion

44

admission

45

Inner circumference of the recording 44

46

Bottom of the picture 44

47

poetry

49

Recording for pin / Dom 36

Claims (21)

Mounting arrangement for fastening a plastic component ( 3 ) an adjustment device for motor vehicles on a vehicle-mounted carrier, wherein mounting arrangement: at least one attachment point ( 49 ) in the carrier ( 1 ) a through hole is formed; at the component ( 3 ) facing away from the through hole, a second plastic existing component ( 4 ) is arranged; one of the two components ( 3 . 4 ) at the respective attachment point a pin ( 36 ) provided by the associated through hole in a provided in the other component receptacle ( 44 protruding into it; and the two components ( 3 . 4 ) are connected together by a connecting means; characterized in that the respective through hole is formed larger than the associated pin ( 36 ), so that the pin does not touch an edge of the through hole, and that at least two positive locking areas ( 20 . 21 ) each spaced from the at least one attachment point ( 49 ) for the positive engagement of the component ( 3 ) in the carrier ( 1 ) are provided to the component ( 3 ) on the carrier ( 1 ) secured against twisting position. Fastening arrangement according to claim 1, wherein the support ( 1 ) in the form-fit areas ( 20 . 21 ) is closed and has no through opening. Fastening arrangement according to one of hergehen claims, wherein at the positive connection areas ( 20 . 21 ) on the carrier ( 1 ) Projections ( 10 ) or recesses are formed or formed, which cooperate with correspondingly formed recesses or projections on the component ( 3 ) are formed or molded. Fastening arrangement according to claim 3, wherein in at least one positive-locking region ( 20 ) the projection fits snugly in the recess of the component ( 3 ), or the recess, the projection of the device ( 3 ) fits snugly. Fastening arrangement according to claim 4, wherein in the at least one positive-locking region ( 20 ) an inner edge of the recess or depression perpendicular to one of the component ( 3 ) or the carrier ( 1 ) spanned plane and an outer contour of the projection of the carrier or the component is inclined to the inner edge, so that the component ( 3 ) in the at least one form-fitting region without play on the carrier ( 1 ) is stored. Fastening arrangement according to claim 4, wherein in the at least one positive-locking region ( 20 ) an inner edge of the recess or the recess is inclined at an angle different from an outer contour of the projection of the carrier or of the component, so that the component ( 3 ) in the at least one form-fitting region without play on the carrier ( 1 ) is stored. Fastening arrangement according to claim 4, wherein in the at least one positive-locking region ( 20 ) are formed or formed on an outer contour of the projection webs or scraper ribs against which an inner peripheral wall of the recess or depression bears directly, so that the component ( 3 ) in the at least one form-fitting region without play on the carrier ( 1 ) is stored. Fastening arrangement according to one of claims 4 to 7, wherein in the second positive locking region ( 21 ) a play of the projection in the recess of the component ( 3 ) or in the recess of the carrier ( 1 ) disappears in a first direction and in a second direction ( 22 ), perpendicular to the first direction, is large. Fastening arrangement according to claim 8, wherein the second direction ( 22 ) at a non-zero angle to a perpendicular to an imaginary connecting line (R) between centers of the recesses ( 20 . 21 ) of the component ( 3 ) or the depressions of the carrier ( 1 ). Fastening arrangement according to claim 8 or 9, wherein the recess ( 21 ) of the component ( 3 ) is formed in the second positive engagement region as a slot, in particular as an elliptical slot, whose longitudinal axis ( 22 ) at a non-zero angle to the perpendicular to the imaginary connecting line (R) between centers of the recesses ( 20 . 21 ) of the component ( 3 ). Fastening arrangement according to claim 10, wherein the in the slot ( 21 ) engaging projection ( 10 ) elliptical or with opposite straight abutment sections for direct contact of an inner edge of the oblong hole ( 21 ) is trained. Fastening arrangement according to one of the preceding claims, wherein the fastening points ( 49 ) in one of the component ( 3 ) or the carrier ( 1 ) define a polygon, wherein the form-fitting regions ( 20 . 21 ) are provided outside the polygon. Fastening arrangement according to claim 12, wherein the Polygon is an isosceles triangle and the interlocking areas mirror symmetric to a bisector perpendicular to a base of the Triangles are arranged. Fastening arrangement according to one of the preceding claims, wherein the pin ( 36 ) substantially cylindrical and the associated receptacle ( 44 ) is formed substantially hollow cylindrical. Fastening arrangement according to one of the preceding claims, wherein the connecting means is designed as a screw and the two components ( 3 . 4 ) releasably connects with each other. Fastening arrangement according to claim 15, wherein the connecting means is designed as a plastic screw and the pin ( 36 ) has an internal thread into which the plastic screw is screwed. Fastening arrangement according to one of the preceding claims, wherein one of the components ( 3 . 4 ) is attached to the supporting part with an additional fastening means. Fastening arrangement according to claim 17, wherein the additional fastening means is designed as a latching element, the component of the pin ( 36 ). Fastening arrangement according to one of the preceding claims, wherein at least one of the two components ( 3 . 4 ) is designed as a plastic housing. Fastening arrangement according to one of the preceding Claims, wherein it is in the adjustment to a window is. Fastening arrangement according to Claim 20, in which the two components ( 3 . 4 ) are formed by a motor housing and a cable outlet housing a cable window lifter.