EP3105398A1

EP3105398A1 - Fastening concept for the play-free mounting of adjustment drives in a motor vehicle

Info

Publication number: EP3105398A1
Application number: EP15703920.7A
Authority: EP
Inventors: Hans-Juergen Oberle; Franz Schwendemann
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2014-02-14
Filing date: 2015-01-30
Publication date: 2016-12-21
Also published as: US20170183903A1; DE102014202765B4; DE102014202765A1; CN105980651B; WO2015121088A1; CN105980651A; KR102278862B1; US9963925B2; KR20160122731A

Abstract

The present invention relates to a drive arrangement having a hinge which comprises a first hinge arm and a second hinge arm which can be rotated with respect to the first hinge arm about a hinge axis, wherein the first hinge arm is arranged by means of a bolt on a support means which is provided to support a torque when the hinge arms are rotated relative to one another, in that the bolt engages through an aperture in the first hinge arm and is fixed by means of an elastic press fit in a through-hole of the support means. The present invention additionally relates to a motor vehicle having such a drive arrangement, to a bolt for such a drive arrangement, and to a method for mounting the drive arrangement.

Description

description

Mounting concept for backlash-free installation of Versteilantrieben in a motor vehicle

State of the art

The present invention relates to a drive assembly having a hinge comprising a first hinge arm and a second hinge arm rotatable about a hinge axis with respect to the first hinge arm, the first hinge arm being attached to a support means by a bolt, the bolt passing through a throughbore in the first hinge arm , The present invention also relates to a motor vehicle having such a drive arrangement and to a method for mounting the drive arrangement.

Such drive arrangements are known for adjusting components, in particular flaps, for example for pivoting the tailgate of a motor vehicle. With them, therefore, flaps of great weight and large dimensions are adjustable. The component is arranged on the second hinge arm. A torque occurring when the second hinge arm rotates relative to the first hinge arm is supported by the bolt and the support means.

To avoid Umschaltgeräuschen when starting the rotation, when stopping the rotation and / or a change of direction, the component must be permanently arranged without clearance on Versteilantrieb. This is often guaranteed while new. Due to the weight and the considerable dimensions of the grain to be adjusted Component and due to the changing load direction when opening and closing the component but over the life of the arrangement but wear and setting processes, especially on the bolt, so that the component is no longer attached without play.

The publication DE 10 2013 226 331.7 therefore discloses a drive arrangement in which the bolt is conical so that it tapers in a first direction of extent to the first hinge arm. In addition, the drive arrangement comprises a force means which pulls or pushes the support means in the first extension direction toward the first hinge arm, or the first hinge arm against the first extension direction towards the support means. As a result, the bolt is pulled or pressed with the force of the force means in the through hole, so that it rests in this clearance. A over the life adjusting game is therefore always compensated immediately with the power means.

Disclosure of the invention

Object of the present invention is to provide an alternative drive arrangement for adjusting a component, in particular a tailgate of a motor vehicle, in which the component is mounted free of play not only in new condition, but as possible over the entire life of the drive assembly, and the inexpensive to produce and easy to install.

The object is achieved with a drive arrangement with a hinge, which comprises a first hinge arm and a relative to the first hinge arm about a hinge axis rotatable second hinge arm, wherein the first hinge arm by means of a bolt on a

Supporting means is arranged, wherein the bolt engages through a recess in the first hinge arm. The Antnebsanordnung is characterized in that the bolt is fixed by means of an elastic press fit in a through hole of the support means.

Since the interference fit has an elasticity, the bolt is not only at the time of installation, but also after setting processes still play in the through hole. A over the life adjusting game is therefore always compensated immediately by the elasticity of the press fit.

For this, it is preferred that the through hole is formed as a slot. As a result, it has an elasticity in a Y direction transversely to the extension direction of the oblong hole. To adapt the elasticity in the Y-direction application-specific, it is also preferred that notches are provided on the through hole. Preferably, a notch extends in or against the extending direction of the through-hole, or a notch extends in the extending direction and another notch on the opposite side against the extending direction.

In addition, it is preferable that the bolt has a cylindrical portion disposed in the through hole. The cylindrical region preferably has a diameter which is greater than a height of the through-hole, in particular in the Y-direction transverse to the direction of extension of the through-bore. When joining the cylindrical portion in the through hole this is therefore, especially in and against the Y direction, expanded. The bolt is then pressed into the through hole. As a result, a restoring force / pressing force of the support means acts on the bolt, which compensates for the over the lifetime adjusting game. The joining force required for press-fitting / joining the cylindrical area of the bolt into the passage bore is preferably applied to the support means by means of a screw connection. For this, the bolt preferably has a threaded area. This has a diameter which is preferably smaller than the height of the through hole. The bolt is thus initially force-free inserted into the through hole in the threaded area.

In order to press / add the bolt with the most uniform joining force in the through hole, he preferably also has between the cylindrical portion and the threaded portion a conical, widening in a joining direction area. Preferably, the conical portion and the cylindrical portion directly adjoin one another.

It is preferred that a diameter of the conical region at the transition to the threaded portion is approximately equal to that of the threaded portion or slightly larger. As a result, the bolt is force-free so far into the through hole available until it rests in the conical region on the support means.

Preferably, a length of the threaded portion is so large that it extends out of the through hole at the conical portion abutting the through-hole. Thereby, the threaded portion is accessible from the outside, and a nut, which is provided for introducing the joining force, is aufdrehbar on the bolt. A length of the conical area plus a length of the cylindrical area is furthermore preferably smaller than the depth of the through-hole. Particularly preferably, the diameter of the conical region at the transition to the cylindrical region is approximately equal to that of the cylindrical region. As a result, the bolt slides at the transition of the conical to the cylindrical portion in the through hole.

Preferably, the arrangement further comprises a stop as an end position for the support means. The stop is arranged in a first preferred embodiment of the bolt. In a second preferred embodiment forms an end face on the hinge, in particular on the first hinge arm, the stop. An embodiment is also preferred in which the stop is provided on a housing, in particular on a motor vehicle body. The stop limits the displacement of the support means along the bolt in the joining direction.

The component is preferably a flap. Particularly preferably, it is a tailgate of a motor vehicle. It is preferred that the component is arranged on the second hinge arm. In this embodiment, the adjustment drive is therefore a damper drive. In principle, the adjusting drive is also suitable for adjusting other components, such as for height adjustment of a seat.

In order to pivot the component automatically, it is preferred that the drive assembly comprises a Versteilantrieb with a drive means. The drive means preferably drives a transmission, preferably a reduction gear for reducing a rotational speed of the drive means.

In order to ensure a sufficient reduction, the transmission is preferably designed as a twin-screw transmission. But it is also preferred another gear, such as a worm gear, a Helical gear, a planetary gear and / or a combination of such gear.

As drive means, the adjusting drive preferably comprises an electric motor, preferably a permanently excited electric motor. Particularly preferred as a motor, a DC motor (DC motor) is used. But it is also preferable to use a synchronous motor.

The adjustment drive is provided for automatically driving the hinge, in particular the second hinge arm. For this, the gear arrangement preferably has an output shaft on which a drive lever, in particular positive and / or non-positive, is arranged rotationally fixed. The second hinge arm is preferably fixed to the drive lever, for example screwed to this. The output shaft preferably extends along an output axis in the joining direction.

In a preferred embodiment, the hinge axis is arranged in alignment with the output axis of the gear arrangement. Most preferably, the first hinge arm is mounted in a bearing bore. The bearing bore is preferably provided centrally in the output shaft. The first hinge arm preferably has a bearing pin, which engages in the bearing bore. This arrangement is very space-saving possible with few components.

The support means is preferably a housing component of the Versteilantriebs. But it is also a body part of a motor vehicle usable. It is particularly preferably designed as a plug-in plate, so that it is plate-shaped. As a result, it can be easily adapted to the geometry of the hinge, for example by an additional bending process. In this embodiment, it is inexpensive to produce from a flat strip material as a stamped part. As a result, there is no additional component required as support means. In addition, the drive arrangement of this embodiment forms a modular unit. As a result, the Versteilantrieb with the drive unit and the gearbox independent of the hinge, and / or the drive assembly with the verse 5 part drive and the hinge regardless of the component produced, assembled and storable.

The object is further achieved with a motor vehicle having such a drive arrangement. The drive arrangement is preferably provided for driving the tailgate of the motor vehicle. But it is also suitable for other flaps or components.

The drive arrangement has the advantage that it ensures over its life in a main load direction, that is, the Y direction, backlash-free Moni s days of the first hinge arm on the bolt. This will be

Switching noise when adjusting the component avoided.

The object is further achieved with a bolt for such a drive arrangement. The bolt is for attaching a first hinge

20 arms provided on a support means. It extends from a mounting end in the joining direction to a mounting end. Preferably, it has a threaded area in the joining direction, a conical area widening in the joining direction, and a cylindrical area. Preferably, the cylindrical portion connects to the

25 conical area immediately. In a first preferred embodiment, it also has a stop immediately adjacent to the cylindrical area. In order to secure the bolt against displacement against the joining direction, he further preferably has a bolt head on.

30 The object is further achieved with a method for mounting such a drive arrangement, with the steps

Sliding the Versteilantriebs in joining direction on the hinge until the bolt passing through the recess of the first hinge arm pin abuts the through hole of the support means, screwing the nut on the bolt until the support means abuts the stop, and

Set the second hinge arm on the drive lever.

It is preferred that a tightening torque of the nut when screwing on the bolt is so great that a tensile force caused by the thread is significantly greater than is required for overcoming the pressing force between the bolt and the support means.

Compared to conventional assembly processes, the assembly of this drive assembly is possible without a complicated setting process. To fix the Versteilantriebs on the hinge, it is only necessary here, the mother, in particular one-handed, unscrew with a tool on the bolt.

In the following the invention will be described with reference to figures. The figures are merely exemplary and do not limit the general idea of the invention.

1 shows a conventional adjustment drive for a component, in particular of a motor vehicle,

2 shows a detail of a drive arrangement according to the invention when mounting a hinge in a perspective view, Fig. 3 shows in (a) a section of the inventive

Drive assembly of Fig. 2 (a) after mounting a first hinge arm of the hinge to a support means of the drive assembly in a perspective view, and in (b) a section through the section of Fig. 3 (a), and

Fig. 4 shows in (a) a support means for the drive assembly and in

(b) - (d) various embodiments of a through-hole.

1 shows an example of a Versteilantrieb 1 for a drive assembly 10. A hinge 5 (see Fig. 2) of the drive assembly 10 is not shown here.

The Versteilantrieb 1 is for adjusting a component (not shown), for example, for pivoting a tailgate, provided. It has an electric motor 1 .6, which drives a gear unit 1 .5, which is provided for the reduction of the rotational speed of the electric motor 1 .6. The gear unit 1 .5 has an output shaft 1 .1 with a bearing bore 1 .3, which extends centrally to an output axis 1 .2. The bearing bore 1 .3 forms an abutment for a first hinge arm 5.1 of the hinge 5, which is fixed relative to a second hinge arm 5.2 of the hinge 5, on which the component can be arranged. The second hinge arm 5.2 can be arranged on a rotationally fixed to the output shaft 1 .1 fixed drive lever 2.

When driving the output shaft 1 .1 about the output shaft 1 .2, the drive lever 2 rotates and with it the second hinge arm 5.2, so that the component is pivoted. In order to support the torque for adjusting the component, a bolt 3 is provided, which is arranged on a support means 4. The support means 4 is formed here as a plate-shaped plug-in plate and a housing part of the Versteilantriebs. 1 The first hinge arm 5.1 can be fastened to the bolt 3 in this drive arrangement 10 according to the prior art.

In the following, the terms support means 3, housing component and plug-in sheet are used synonymously. The bolt 3 shown here is cylindrical and therefore has a constant diameter (not designated). It allows due to an eccentric design a backlash-free setting, at least when new.

In contrast, the bolt 3 arranged on the first hinge arm 5.1 of the drive arrangement 10 according to the invention of FIGS. 2 and 3 has both a conical area 3.2 and a cylindrical area 3.3.

The drive arrangement 10 according to the invention of FIG. 2 is likewise provided for adjusting the component, here a flap, for example a tailgate. It has the Versteilantrieb 1 with the electric motor 1 .6 as a drive means. The Versteilantrieb 1 is therefore a damper drive, such as a tailgate drive for a motor vehicle (not shown). In the following, the terms Versteilantrieb 1, damper drive and tailgate drive are used interchangeably. In addition, the terms component, flap and tailgate are used synonymously below.

The electric motor 1 .6 drives the transmission 1 .5, which is provided for the reduction of the rotational speed of the electric motor 1 .6. The transmission 1 .5 is preferably designed as a twin-worm gear. It rejects the Abtnebswelle 1 .1, which extends concentrically in a joining direction 6 about the output axis 1 .2 (see Fig. 3). On the output shaft 1 .1 of the drive lever 2 is arranged rotationally fixed. The drive lever 2 extends transversely to the joining direction in a radial direction (not designated) to the drive axis 1 .2. Since it is rotatably mounted on the drive shaft 1 .1, it rotates when driving the output shaft 1 .1 in or against a direction of rotation 61st At the drive lever 2, a mounting pin 2.1 is provided for attaching the second hinge arm 5.2. Fig. 2 shows a section of the drive assembly 10 according to the invention in an installed state E. Visible are the first and the second hinge arm 5.1, 5.2 of the still to be mounted hinge 5. The two hinge arms 5.1, 5.2 are rotatable about a common hinge axis 5.3 relative to each other. In this case, the hinge 5 is mounted here in the bearing bore 1 .3 of the output shaft 1 .1, so that the output shaft 1 .2 and the hinge axis 5. 3 are arranged in alignment with one another. This is shown schematically by the output shaft 1 .2 and hinge axis 5.3 shown here in alignment with one another. But it is also a drive assembly 10 is preferred in which the output shaft 1 .3 and the hinge axis are spaced 5.3.

The installation is usually done by the Versteilantrieb 1 is joined to the hinge 5. This is shown here by the joining direction 6. The second hinge arm 5.2 is fixed in a mounted state M (see Fig. 3) on the mounting pin 2.1 of the drive lever 2 positively and / or non-positively. In the assembled state M, the flap is also attached to the second hinge arm 5.2. The positive and / or non-positive attachment of the second hinge arm 5.2 on the drive lever 2 then forms the interface to the component. When the electric motor 1 .6 is driven, the second hinge arm 5.2 with the drive lever 2 is moved around the flock. nierachse 5.3 turned in or against the direction of rotation 61. In this case, the flap is pivoted with the second hinge arm 5.2 in or against the direction of rotation 61. This will open or close it. The angle (not shown) about which the drive shaft 1 .1 is rotated, corresponds approximately to an opening angle (not shown) of the flap.

In order to support a torque occurring when adjusting the tailgate, the support means 4 and the bolt 3 are provided. It is arranged without play on the support means 4 after assembly of the drive assembly 10. The support means 4 is also formed here as a plate-shaped extending plug-in sheet.

For this purpose, the first hinge arm 5.1 a recess 5.1 1, which is provided for receiving the bolt 3. The recess 5.1 1 is spaced from the hinge axis 5.3.

The support means 4 also has a through hole 4.1, which is provided for receiving the bolt 3. The bolt 3 is pushed against the joining direction 6 through the recess 5.1 1. When moving the support means 4 in the joining direction 6, he also passes into the through hole 4.1. In order to limit the displacement of the bolt 3 against the jointing direction 6, the latter has a bolt head 3.5 at an assembly end 301 (see Fig. 3 (a)) as the end position of the bolt 3 on the first hinge arm 5.1. In principle, a hinge with an integrally arranged on the first hinge arm 5.1 bolt 3 is used.

The through hole 4.1 in the support means 4 is formed as a slot. It extends in an extension direction X transverse to the joining direction 6. As a result, it has an elasticity in a Y-direction Y, which extends transversely to the extension direction X, and in particular also transverse to the joining direction. 6 At a mounting end 301 opposite the mounting end 302 of the bolt 3, a threaded portion 3.1 connects. In addition, the bolt 3 has a widening in the joining direction 6 conical region 3.2, and a cylindrical portion 3.3. The cylindrical region 3.3 connects directly to the conical region 3.2. In the embodiment shown here, the bolt 3 also has a stop 3.4, which immediately adjoins the cylindrical portion 3.3. In addition, the conical region 3.2 connects in the embodiment shown here directly to the threaded portion 3.1.

The cylindrical portion 3.3 of the bolt 3 has a constant diameter d3, which is greater than a height hy of the through hole 4.1, in particular in the Y direction Y is. In the threaded portion 3.1, the outer diameter d1 of the thread 3.1 1 is smaller than the height hy of the through hole 4.1. In the conical region 3.2, the diameter d2 of the bolt 3 increases in the joining direction 6 until it reaches the diameter d3 of the cylindrical region 3.3 at the transition 3.23 to the cylindrical region 3.3. At the transition 3.12 of the threaded portion 3.1 to the conical portion 3.2, the conical portion 3.2 of the bolt 3 has a diameter d2, which corresponds approximately to that of the threaded portion 3.1 or only slightly larger.

As a result, the support means 4 is first force-free on the bolt 3 pushed, so that it passes through the through hole 4.1 until the bolt 3 applies in the conical region 3.3 to the support means 4.

A length h1 of the threaded region 3.1 is so great that the bolt 3 extends out of the through-bore 4.1 when the conical region 3.2 abuts the through-bore 4.1. As a result, the threaded portion 3.1 is accessible from the outside. This is a mother 7, which is provided for introducing the joining force, screwed onto the bolt 3. When screwing the support means 4 shifts in the joining direction 6 along the bolt 3. Since the diameter d3 of the cylindrical portion 3.3 is greater than the

Height hy the through hole is 4.1, the through hole 4.1 is widened when screwing the nut 7. As a result, the bolt 3 is pressed into the through hole 4.1. As a result, the support means 4 acts when mounted nut 7 with a restoring force on the bolt 3, through which the over the life adjusting game is compensated.

In order for the bolt 3 to be mounted without clearance on the support means 4 in the joining direction 6, on the one hand a length h2 of the conical region 3.2 plus a length h3 of the cylindrical portion 3.3 is smaller than a depth t of the through bore 4.1. On the other hand, the drive assembly

10 serving as an end position for the support means 4 stop 3.4, which is arranged here on the bolt 3. The stop can also be formed by the first hinge arm 5.1 or a housing component (not shown). The stop 3.4 limits the displacement of the support means 4 along the bolt 3 in the joining direction. 6

FIG. 3 shows the bolt 3 mounted on the support means 4. In this embodiment, a disk 8 is arranged between the support means 4 and the nut 7.

The screw connection between the thread 7.1 of the nut 7 and the thread 3.1 1 of the threaded portion 3.1 of the bolt 3 is highlighted in Fig. 3 (b). Between the threaded portion 3.1 and the conical portion 3.2 here is an area (not labeled) without thread 3.1 1 is provided, which bridges the disc 8. To mount the drive assembly 10, the bolt 3 is joined against the joining direction 6 in the recess 5.1 1 of the first hinge arm 5.1. Subsequently, the adjusting drive 1 is pushed in the joining direction 6 on the hinge 5, in particular on the first hinge arm 5.1, until the pin 3 abuts against the through hole 4.1 of the support means 4. The bolt 3 is dimensioned so that it then rests in the conical region 3.2 on the support means 4, in particular on the through hole 4.1.

Then the nut 7 is screwed onto the bolt 3 until the support means 4 rests against the stop 3.4. The tightening torque of the nut 7 is sufficiently large when screwed onto the bolt 3, so that the tensile force of the thread 7.1, 3.1 1 is large enough to overcome the pressing force between the bolt 3, in particular the cylindrical portion 3.3, and the support means 4. Since the diameter d3 of the cylindrical portion 3.3 is greater than the height hy of the through hole 4.1, this is widened, in particular in the Y direction Y. As a result, the bolt 3 is fixed with an elastic press fit in the through hole 4.1.

Thereafter, the second hinge arm 5.2 on the drive lever 2, in particular on the mounting pin 2.1, set.

Compared to conventional assembly processes for fixing the first hinge arm 5.1 here only screwing the nut 7 with a sufficiently large torque required. The assembly is therefore very simple and without costly adjustment operations, especially one-handed, possible with a tool.

In Fig. 4 (a), the support means 4 is shown, wherein the joining of the support means 4 is shown schematically on the bolt 3 in the joining direction 6. The 4 (b) - (d) each show a section of the support means 4 with various embodiments of the through hole 4.1.

The through hole 4.1 of FIG. 4 (b) is formed as a slot extending in the extension direction X. In order to adapt the elasticity of the through hole 4.1 in the Y direction Y in an application-specific manner, the through-bore 4.1 of FIG. 4 (c) has a notch 4.1 1 in the direction of extent X. Compared to the through hole 4.1 of FIG. 4 (b), the elasticity of the through hole 4.1 of FIG. 4 (c) in the Y direction Y is thereby greater.

An even greater elasticity of the through hole 4.1 can be achieved by the through hole 4.1 has two notches 4.1 1, which extend in and against the direction of extension X of the through hole 4.1, and are therefore arranged on opposite sides of the through hole 4.1. This is shown in Fig. 4 (d).

By selecting the elasticity of the through hole 4.1, the elasticity of the press fit between the cylindrical portion 3.3 of the bolt 3 and the support means 4 is adjustable.

By simulation, it has been shown that a plastic deformation of the through hole of about 40% is opposed by an elastic deformation of about 60%, through the freedom from play the connection of the bolt 3 with the support means 4 despite any setting operations over the life of the drive assembly 10 made sure is.

Claims

claims

1 . Drive arrangement (10) for a rotatable flap - in particular a tailgate - with a hinge which has a first hinge arm (5.1) and a relative to the first hinge arm (5.1) about a hinge axis (5.3) rotatable second hinge arm (5.2), wherein the drive assembly (10) comprises a support means (4) on which a bolt (3) is arranged, which passes through a recess (5.1 .1) in the first hinge arm (5.1),

characterized in that

the bolt (3) is fixed in the passage bore (4.1) of the support means (4) by means of an elastic press fit.

Second drive arrangement (10), in particular according to claim 1, characterized in that the through-bore (4.1) has an extension direction (X), wherein it is in a Y-direction (Y) transversely to an extension direction (X) elastic.

3. Drive arrangement (10) according to one of the preceding claims, characterized in that the through-bore (4.1) as

Long hole is formed.

4. Drive arrangement (10) according to one of the preceding claims, characterized in that at the through-bore (4.1) a notch (4.1 1) is provided.

5. Drive arrangement (10) according to one of the preceding claims, characterized in that the support means (3) is designed as a plug-in plate.

6. Drive arrangement (10) according to one of the preceding claims, characterized in that the bolt has a cylindrical portion (3.3) having a diameter (d3) which is greater than a height (hy) of the through hole (4.1).

7. Drive arrangement (10) according to one of the preceding claims, characterized in that the bolt (3) has a threaded portion (3.1) with a thread (3.1 1), wherein an outer diameter (d1) of the bolt (3) in the threaded portion (3.1 ) is smaller than the height (hy) of the through hole (4.1).

8. Drive arrangement (10) according to one of the preceding claims, characterized in that between the threaded portion (3.1) and the cylindrical portion (3.3) is a conical, in a

Joining direction (6) widening area (3.2) is provided.

9. Drive arrangement (10) according to one of the preceding claims, characterized in that a diameter (d2) of the conical region (3.2) at a transition (3.23) to the cylindrical portion (3.3) is approximately equal to that of the cylindrical portion (d3).

10. Drive arrangement (10) according to one of the preceding claims, characterized in that a length (h1) of the threaded portion (3.1) is greater than the depth (t) of the support means (4).

1 1 .Antriebsanordnung (10) according to any one of the preceding claims, characterized in that it comprises a stop (3.4) for the support means (4).

12. Drive arrangement (10) according to one of the preceding claims, characterized in that it comprises an adjustment drive (1) for automatically rotating the second hinge arm (5.2), wherein the second hinge arm (5.2) on a drive lever (2) is arranged, the rotatably on an output shaft (1 .1) of the adjustment (1) is arranged.

13. Motor vehicle with a rotatable flap - in particular a tailgate - comprising a drive assembly (10) according to one of the preceding claims.

14. bolt (3) for a drive assembly (10) according to any one of claims 1-12.

15. A method of assembling a drive assembly (10) according to any one of claims 1-12, comprising the steps

o Sliding the adjusting drive (1) in the joining direction (6) on the hinge until the bolt (3) passing through the recess (5.1 1) of the first hinge arm (5.1) abuts against the through hole (4.1) of the support means (4)

o screw the nut (7) onto the bolt (3) until the support (4) touches the stop (3.4), and

o Fix the second hinge arm (5.2) to the drive lever (2).