DE102018120817A1 - Actuating unit for automotive applications, in particular motor vehicle door locks - Google Patents

Abstract

The invention relates to an actuating unit (10) for automotive applications, comprising a housing (23), an in the housing (23) arranged electric motor (11) with a motor shaft (17) and at least one support means (12, 14) for radial mounting the motor (11) in the housing (23), wherein the at least one bearing means (12, 14) the motor (11) on the motor shaft (17) mounted radially in the housing (23).

Description

The invention relates to an actuating unit for motor vehicle applications, in particular motor vehicle locks, motor vehicle door locks or Zuziehantriebe for motor vehicle door locks, comprising a housing, an electric motor arranged in the housing, and a support means for radial mounting of the motor in the housing.

In today's motor vehicles adjusting movements are often performed with electric motor drives. In this case, for example, provide a sliding element for locking, for example, a fuel filler flap or even be used where, for example, a closing movement of a flap or door of a motor vehicle is performed automatically. The electric motors, in particular DC motors, are stored in a housing and act on their output with a gear and / or directly with an actuating means together.

On the one hand, it may be due to vibrations in the motor vehicle, for example, by bumps in the ground or even vibrations generated in the vehicle, for example by a drive motor for the motor vehicle, come to shaking, which also affects the interaction between the electric motor and driven by the electric motor component can affect. At the same time vibrations and / or, for example, drive torques can be generated by the electric motor itself, which can lead to movements in the electric drive system. Overall, the invention is concerned with the storage and mounting of an electric motor in an actuating unit of a motor vehicle.

An actuator of the structure described above is in the DE 10 2009 036 835 A1 the applicant described. In fact, at this point, the actuator is designed as a linear actuator and is used to apply a Zuzieheinrichtung. The closing device may be one of those used in the DE 101 12 120 B4 is described.

The state of the art after the DE 10 2011 107 634 A1 discloses an actuator for motor vehicle door locks with a housing, further comprising a drive arranged in the housing, an actuator acted upon by the actuator and at least one rubber bearing for the drive, wherein the housing is equipped with distributed on the circumference of the rubber bearing receiving jumps in the region of a rubber bearing receptacle. In addition to the interaction of rubber bearings and receiving projections, the rubber bearing has formations that extend into recesses of the electric drive. Due to the formations and in particular the interaction of formations and recesses thus the electric drive is mounted against rotation by the rubber bearings.

From the generic US 9,464,464 B2 a drive unit for automotive applications, in particular for use in or in combination with a motor vehicle door lock has become known, with a housing, further comprising a motor and an associated motor shaft and at least one axial force generating spring element at one end of the motor shaft, wherein the spring element in at least one receptacle is arranged in the housing. The spring element is formed according to the disclosure of insertable into the record end plates. At the respective end plates is located at the end faces of the associated motor shaft under bias. In this way, the end plate, which is formed as a T-shaped spring element, able to absorb any movements of the motor shaft in the axial direction resiliently.

In the prior art, a support means for radial mounting of the motor supports the motor to a motor housing in the housing.

The invention is based on the technical problem of improving such an adjustment unit for automotive applications, in particular in that a secure and low-noise radial bearing of the motor in the housing is achieved.

The object is achieved by the features of independent claim 1. Advantageous embodiments of the invention are specified in the dependent claims. It should be noted that the embodiments described below are not restrictive, but rather any variation possibilities of the features described in the description and the subclaims are possible.

According to the invention, the technical problem is solved in that an actuating unit for motor vehicle applications, in particular motor vehicle locks, motor vehicle door locks or Zuziehantriebe for motor vehicle locks and / or door locks is provided, comprising a housing, an electric motor arranged in the housing with a motor shaft and a motor housing and with at least one support means for radial mounting of the motor in the housing. According to the invention, the at least one bearing means supports the motor on the motor shaft radially in the housing. Due to the inventive design of the actuator vibration of the engine initiated in operation via the motor shaft and the bearing means in the housing, whereby a noise reduction can be achieved compared to an introduction via the motor housing into the housing. The fact that the at least one bearing means supports the motor on the motor shaft radially in the housing, should be understood in this context that the bearing means engages exclusively on the motor shaft instead of the motor housing, so that bearing forces acting only on the motor shaft on the engine.

As actuators in the context of the invention, for example, motor vehicle door locks or Zuziehantrieb for motor vehicle door locks can be used. In this case, the invention is not limited thereto, but can be used accordingly in comparable actuation units for motor vehicles, which initialize an adjusting movement, linear or rotatory. Such actuators are, for example, locking elements, as used, for example, in tank flap closures as locking elements.

The adjusting unit has a housing which serves to receive the motor or electric drive. Preferably, the housing surrounds the drive at least partially. The motor is preferably an electric motor and more preferably a DC motor. By means of the drive, an actuator can be actuated. As an actuator come gear but also directly operable actuating means into consideration. For example, may be arranged on an output shaft of the motor, a worm wheel, which cooperates with a worm gear, wherein the worm gear, for example, can act on a lever or a spindle. This listing of adjusting means, which can be acted upon by the drive, is not exhaustive, but merely exemplary.

In one embodiment variant of the invention, the bearing means is a bearing, in particular a slide bearing, roller bearing, roller bearing and / or needle roller bearings. The use of a commercial bearing offers the possibility, on the one hand provide cost-effective components for the preparation of the actuator unit and on the other hand, a high degree of constructive freedom, since the commercial bearings are available in many versions. According to the invention, different types of bearings can also be combined in order, on the one hand, to enable safe guiding of the motor shaft and, on the other hand, to be able to provide axial play of the motor shaft. In addition, the selection of the type of bearing can be driven, for example, if high forces are transmitted in a Zuziehantrieb, so with the selection of a suitable bearing means or bearing a smooth or provided with low friction bearing for the motor shaft and the drive for Will be provided.

If the motor shaft projects out of the motor housing on both sides and the bearing means is arranged on both sides of the motor housing, this results in a further embodiment variant of the invention. A bilateral bearing of the motor shaft supports a precise guidance of the motor shaft, so that defined engagement conditions between the output and the drive can be achieved. If, in the context of the invention, an output is used, this means, for example, a gear or a worm arranged on the output shaft. As a drive, for example, a slide, or a toothing or worm with the output form a transmission. The two-sided storage of the motor shaft can be provided very precise engagement conditions, which in turn allow for lower tolerances and a lower clearance in the engine downstream gear. A lesser clearance has a positive effect on the transmitted power and at the same time reduces the noise behavior of the actuator. Noise can be reduced. Gear parts can be designed more precisely and enable safe transmission of forces and / or moments.

If the bearing means at least partially firmly connected to the motor shaft, so there is a further advantageous design variant of the invention. According to this embodiment variant, at least part of the bearing is firmly connected to the motor shaft. In this case, for example, there may be an interference fit with the motor shaft. To provide a clearance compensation then the bearing means itself is able to take a game, so that the motor shaft can perform the operational axial movements. An axial clearance compensation in the bearing means can be provided for example by a roller or ball bearings. But it is also conceivable that, for example, a multi-part, preferably two-part slide bearing is used, so that on the one hand, a precise fit of the motor shaft and at the same time an axial clearance compensation can be provided.

If the bearing means accommodated in a housing shell and / or a housing cover of the actuating unit, this results in a further embodiment variant of the invention. The actuator comprises a housing into which the engine, a gear, a slider, electronic components and / or other locking mechanisms may be inserted. Preferably, the motor is positively inserted into a housing shell or a housing bottom and electrically contacted. For complete fixing of the motor, the housing shell can be closed with at least a portion of the housing cover. When closing the housing, at least the motor housing is held torque-proof in the housing. In addition and according to the invention At least a part of the bearing means, such as an outer ring of a split bearing can be fixable in the housing by means of the housing cover. But it is also conceivable that a one-piece bearing means is present, which receives the motor shaft axially displaceable in the housing. By means of the closing of the housing with the aid of the housing cover can thus be fixed or the bearing means, so that a secure axial guidance of the motor shaft can be realized.

In addition, in a further embodiment variant, the motor can be accommodated in a support means. A support means serves to provide a torque arm for the engine. The inventive combination of a support means as a torque arm and a directly acting on the motor shaft bearing means can ensure a very accurate holding, guiding and positioning of the motor as a drive for the actuating means. The designed as a torque arm for the engine support means is preferably formed of plastic and surrounds the motor housing at least partially, so that, for example, a pre-assembly of the support means on the motor housing is possible. Preferably, the proppant according to the not vorveröffentlichen DE 10 2018 109 039 executed by the applicant.

In a further embodiment of the invention, the housing has crush ribs at least in the region of a receptacle of the bearing means. Quetschrippen may be integrally formed with the housing and are preferably made as well as the housing made of plastic. Crimp ribs allow a tight fit of the bearing means in the housing, so that tolerances in the manufacture of the housing can be eliminated.

It is also conceivable according to the invention that the bearing means are designed in several parts. A multi-part construction of the bearing means allows comfortable assembly during production of the actuator, for example, a part of the bearing means are inserted into the housing shell, and after assembly of the motor, the other parts of the bearing means can be inserted into the housing or the housing shell. Thus, a mounting in a simplified form is possible. It is also conceivable that a part of the bearing means in the housing shell and another part of the bearing means in the housing cover can be inserted. By using the bearing means thus inaccuracies in production can be compensated, it can ensure precise engagement conditions and at the same time an axial clearance compensation is possible.

The invention will be explained in more detail with reference to the accompanying drawings with reference to a preferred embodiment. However, it is the principle that the embodiments do not limit the invention, but represent only advantageous embodiments. The illustrated features may be performed individually or in combination with other features of the specification as well as the claims individually or in combination.

• 1 eine Motorwellenlagerung gemäß dem Stand der Technik, und
• 2 eine erfindungsgemäße Motorwellenlagerung in einer Draufsicht und als Schnitt durch die Lagermittel und eine Schnecke an der Abtriebswelle.

It shows:

• 1 a motor shaft bearing according to the prior art, and
• 2 a motor shaft bearing according to the invention in a plan view and as a section through the bearing means and a worm on the output shaft.

The drive unit according to the 1 The prior art consists essentially of an engine 1 with associated motor shaft 2 together. The motor shaft 2 towers over the engine 1 both sides. In addition, the output side of the engine 1 a gearbox 3 . 4 provided in the transmission 3 . 4 it is a worm gear 3 . 4 , Because both the motor shaft 2 opposite the engine 1 as well as the worm gear 3 . 4 generate an axial play of the motor shaft are two spring elements 6 intended. The entire drive unit is in connection with the respective spring element 6 overall in an associated housing 5 added. It can be seen that the motor shaft 2 at its two ends with an associated spring element 6 equipped. The spring element 6 is in a recording 7 in the case 5 arranged. The spring elements 6 lie on the associated end faces of the end of the motor shaft 2 under pretension. In this way, the spring elements 6 Able to absorb any movements of the motor shaft in the axial direction resiliently. A radial bearing of the engine 1 is through the housing 5 made, the housing 5 to have projecting areas that the engine 1 enclose on a motor housing. For the radial bearing of the engine 1 is thus attached to the motor housing.

In the 2 is an actuator 10 only partially and in principle reproduced. The actuator 10 includes a motor 11 , a first storage means 12 , a warehouse agent pickup 13 , a second storage means 14 , a second bearing center receptacle 15 for the second storage means 14 , as well as a gear unit 16 , The motor 11 includes a motor housing 27 and a motor shaft 17 starting from the storage facility 12 through the motor housing 27 and the second storage means 14 to a gear 18 the gear stage 16 extends. The motor shaft 17 protrudes from both sides of the motor housing 27 out. The gear 18 may be, for example, a worm, with a worm wheel 19 combs. there is the worm wheel 19 around a rotation axis 20 around in the direction of the arrow P rotatable.

By way of example, in the embodiment according to the 2 two different storage means 12 . 14 played. The storage means 12 . 14 store the engine 11 at the motor shaft 17 radially in the housing 23 , To do this, you grip the motor shaft 17 of the motor 11 at.

The first storage medium 12 is designed as a multipart, for example roller bearings. A first inner bearing part 21 For example, a bearing sleeve is fixed to the motor shaft 17 connected. An outer bearing part 22 is fixed to the bearing center receptacle 13 firmly connected. The camp media shots 13 . 15 can be part of a housing shell 23 the actuator 10 be, so the storage means 12 . 14 in the housing shell 23 are included. Alternatively, the bearing means shots 13 . 15 be executed in a housing cover. Between the inner bearing part 21 and the outer bearing part 22 For example, rollers may be arranged which have a relative movement between the inner and outer bearing part 21 . 22 enable. Thus, an axial clearance compensation in the direction of the center line 25 and in the direction of the arrow A ermöglichbar. Basically, only a storage medium 12 or a storage medium 14 be provided.

The second storage medium 14 is formed in this embodiment, for example, as a plain bearing. The plain bearing 14 is constructed in one piece and before the assembly of the engine 11 at the motor shaft 17 assembled. The storage medium 14 is fixed to the bearing center receptacle 15 connected so that the storage means 14 can be fixed. The motor shaft 17 again, due to a sufficient tolerance game 26 axially in the bearing means 14 move. As shown in this embodiment, there are two bearing means 12 . 14 on both sides of the motor housing 27 can be arranged, with different embodiments of storage means 12 . 14 can be combined as shown. Of course, the same storage means 12 . 14 for securing the position of the motor shaft 17 in the actuating means 10 used.

Will now be the engine 11 controlled, so learns the transmission 16 a start-up pulse, where the worm 18 relative to the worm wheel 19 moves, which makes it especially when starting to a pulse to the motor shaft 17 comes. This pulsing shifts the motor shaft 17 in the direction of the axial play A , where the motor shaft 17 This shift may follow, passing through the bearing means 12 . 14 precise feasible. It can thus precise engagement conditions in the transmission 16 will be realized.

LIST OF REFERENCE NUMBERS

1

engine

2

motor shaft

3, 4

transmission

5

casing

6

spring elements

7

admission

10

actuator

11

engine

12, 14

bearing means

13, 15

Bearing borrowings

16

transmission

17

motor shaft

18

slug

19

worm

20

axis of rotation

21

inner bearing part

22

outer bearing part

23

shell

24

roll

25

center line

26

tolerance game

27

motor housing

A

axial clearance compensation

P

arrow

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 102009036835 A1 [0004]
• DE 10112120 B4 [0004]
• DE 102011107634 A1 [0005]
• US 9464464 B2 [0006]
• DE 102018109039 [0017]

Claims (10)

Actuating unit (10) for motor vehicle applications, in particular vehicle closures or Zuziehantriebe for motor vehicle door locks, comprising a housing (23), an in the housing (23) arranged electric motor (11) with a motor shaft (17) and a motor housing (27), and at least one Bearing means (12, 14) for the radial mounting of the motor (11) in the housing (23), characterized in that the at least one bearing means (12, 14) the motor (11) on the motor shaft (17) radially in the housing (23) outsourced. Actuator (10) after Claim 1 , characterized in that the bearing means (12, 14) is a bearing, in particular a plain bearing, roller bearings, roller bearings and / or needle roller bearings. Actuator (10) according to one of Claims 1 or 2 , characterized in that the motor shaft (17) protrudes from both sides of the motor housing (27) and that on both sides in each case a bearing means (12, 14) is arranged. Actuator (10) according to one of Claims 1 to 3 , characterized in that the bearing means (12, 14) at least partially fixed to the motor shaft (17) is connected. Actuator (10) according to one of Claims 1 to 4 , characterized in that by means of the bearing means (12, 14) an axial clearance (A) of the motor shaft (17) is compensated. Actuator according to one of Claims 1 to 5 , characterized in that the bearing means (12, 14) in a housing shell (23) and / or a housing cover of the adjusting unit (10) is accommodated. Actuator (10) according to one of Claims 1 to 6 , characterized in that the motor (11) is received in a support means. Actuator (10) after Claim 7 , characterized in that the support means at least partially overlaps the motor (11) and / or engages in the motor housing (27). Actuator (10) according to one of Claims 1 to 8th , characterized in that the housing (23) has crush ribs at least in the region of a receptacle (13, 15) of the bearing means (12, 14). Actuator (10) according to one of Claims 1 to 9 , characterized in that the bearing means (12, 14) are formed in several parts.

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