DE102009019726A1 - Drive assembly for e.g. window, of motor vehicle, has drive motor arranged in housing, accommodating retainer provided for accommodating rotation bearing, and supporting rotation bearing over accommodating retainer on housing - Google Patents

Abstract

The assembly has a drive motor (2) arranged in a housing (1), and a rotation bearing (8) associated with a drive shaft (3). The rotation bearing (8) is supported on the housing. An accommodating retainer (10) is provided for accommodating the rotation bearing, and supports the rotation bearing over the accommodating retainer on the housing. The rotation bearing includes an inner bearing ring (11), bearing outer ring (12) and an intermediate rolling element (13) which adjusts the accommodating retainer of the bearing outer ring. Commutator brushes are connected with a commutator. An independent claim is also included for a method for assembling of a drive assembly for a motor vehicle.

Description

The The invention relates to a drive assembly of a motor vehicle according to the The preamble of claim 1 and a method for assembling such Drive assembly according to the preamble of claim 28th

The in question drive assembly is for the motor Adjustment of all possible adjusting elements in a motor vehicle used. In the present case is the motorized adjustment of windows of a motor vehicle in the foreground. This is not limiting to understand. Only by way of example is the motor adjustment of Exterior mirrors, vehicle seats, vehicle locks, Vehicle doors, vehicle doors or the like called.

The known drive assembly ( DE 39 30 144 C2 ), from which the invention proceeds, is used for the motorized adjustment of windscreen wipers of motor vehicles. The known drive assembly is equipped with a housing and a housing arranged in the drive motor drive shaft and downstream transmission. The drive motor is a DC motor having a brush holder with commutator brushes and an associated commutator.

Of the Rotor of the drive motor is connected to the drive shaft of the drive motor connected. The bearing of the drive shaft is each end provided with a sliding bearing, wherein the rotor-side sliding bearing designed as a spherical bearing.

Between The two plain bearings is a rotary bearing in shape a ball bearing provided in a housing assigned bearing plate is arranged. When fitting between the End shield on the one hand and the bearing outer ring of the ball bearing on the other hand, it is usually one Press fit.

By Leave the arrangement of the ball bearing between the two slide bearings engine-side and transmission-side influences on the Balancing drive shaft well.

Of the above-mentioned use of a ball bearing for supporting the drive shaft leads in the embodiment of the housing made of plastic regularly to difficulties. In such a Arrangement is the bearing outer ring of the ball bearing over the mentioned interference fit into engagement with the housing. The problem is the fact that the intervention between the ball bearing and the plastic housing in noteworthy Dimensions with the temperature changes. In extreme cases This causes that in certain temperature ranges no press fit is present anymore. The result is vibrations that among other things, an undesirable noise and thus lead to a non-optimal operating behavior.

Of the Invention is based on the problem, the known drive assembly in such a way and further develop that the performance over a wide temperature range is optimized.

The The above problem is with a drive assembly according to the The preamble of claim 1 by the features of the characterizing one Part of claim 1 solved.

Essential is that the rotary bearing now indirectly, namely via a receiving cage, on Housing supported. The recording cage is in a sense, an adapter for integrating the rotary roller bearing in the case. With the recording cage leaves virtually any coupling between the rotary roller bearing and adjust the housing.

The above adjustment of the coupling between the rotary roller bearing and the housing is best achieved by that the receiving cage initially sections is designed compliant. This is the subject of claims 12 until 14.

To another doctrine, which has its own significance, The above problem arises in a method of assembling a drive assembly according to the preamble of claim 28 by the Characteristics of the characterizing part of claim 28 solved.

Essential is the consideration that when using the above mentioned Recording cage that possibly arranged on the drive shaft Rotary rolling bearing in a pre-assembly initially can be used in the receiving cage and that subsequently the receiving cage together with the rotary bearing can be used in the housing of the drive assembly. at appropriate design of the receiving cage, this can lead to an acceleration of the assembly process.

in the The invention will be described below with reference to a mere exemplary embodiments illustrative drawing explained in more detail. In the Drawing shows

1 a proposed drive assembly in a partially sectioned, perspective view,

2 the drive shaft of the drive assembly according to 1 in pre-assembled condition,

3 another proposal drive assembly in a sectional side view,

4 another drive assembly in a sectional side view,

5 the receiving cage of the drive assembly according to 1 in a perspective view,

6 the receiving cage of the drive assembly according to 3 in a perspective view and

7 the receiving cage of the drive assembly according to 4 in a perspective view.

The in the drawing exemplified, according to the proposal Drive assemblies are the scope of application of power windows Act. This is not meant to be limiting. In particular, those mentioned in the introductory part of the description Areas in the context of the invention advantageously applicable.

The drive modules shown are each with a housing 1 and with one in the case 1 arranged, electric drive motor 2 with drive shaft 3 and downstream transmission 4 fitted. In the transmission 4 each is a worm gear with a worm 5 and a worm wheel 6 ,

In the 1 to 4 is next to a magnetic wheel 7 for a rotary encoder a rotary bearing 8th shown, that of the drive shaft 3 is assigned and located on the housing 1 supported. The rotary rolling bearing 8th is here and preferably between the rotor 9 of the drive motor 2 and the worm gear 4 arranged. The reason for this is that in this area the tendency of the drive shaft to oscillate 3 is comparatively high.

It is essential now that a receiving cage 10 for receiving the rotary roller bearing 8th is provided and that the rotary roller bearing 8th indirectly, namely via the receiving cage 10 , on the housing 1 supported. It has already been explained in the general part of the description that thus the coupling between the rotary roller bearing 8th and the housing 1 is optimally adjustable.

Here and preferably, the rotary bearing 8th with a bearing inner ring 11 a bearing outer ring 12 and intermediate rolling elements 13 fitted. It takes the receiving cage 10 the bearing outer ring 12 on while the bearing inner ring 11 with the drive shaft 3 engaged.

The housing 1 the drive assembly is preferably divided into two and has on the one hand a transmission housing 14 for receiving transmission components such as the worm 5 and the worm wheel 6 and on the other hand, a motor housing 15 for holding engine components such as the rotor 9 on. This is the motor housing 15 around the pole pot of the drive motor 2 for receiving the rotor 9 ,

Preferably, the housing is made 1 at least in the support area 16 of the rotary roller bearing 8th made of plastic. A particularly cost-effective implementation can be achieved in that the housing 1 all or at least the gearbox 14 completely made of plastic. This is due to the impact of the use of the receiving cage 10 without the risk of damage to the housing 1 possible, as explained above.

It can be the representation in the 3 and 4 Take that out of the drive shaft 3 a second camp 17 is assigned, this second camp 17 at one end of the drive shaft 3 , here at the back of the pole pot 15 , is arranged.

Furthermore, the drive shaft 3 a third camp 18 associated with the rotary roller bearing 8th between the second camp 17 and the third camp 18 is arranged.

In the sense of a cost-effective realization is or are the second camp 17 and / or the optional third bearing 18 designed as a sliding bearing, in particular as a spherical bearing.

A variant associated with low production costs is that the receiving cage 10 is designed as a sheet metal part, wherein the sheet thickness is preferably in a range between about 0.4 mm and about 1.2 mm, in a particularly preferred embodiment at about 0.6 mm.

With a suitable design of the receiving cage 10 can be ensured that the pressure exerted by the bearing forces on the housing 1 is comparatively low. Against this background, it is preferable that the contact surface between the receiving cage 10 and the housing 1 larger than the contact surface between the bearing outer ring 12 and the receiving cage 10 is.

Special importance is attached to the mounting of the rotary roller bearing 8th at the reception cage 10 on the one hand and the receiving cage 10 on the housing 1 on the other hand. In both cases, it is here and preferably provided that the connection is a non-positive and positive engagement. In principle, however, it is conceivable that this intervention is exclusively positive or exclusively positive fit.

In a particularly preferred embodiment, the receiving cage 10 at least partially compliant, designed in particular elastic, resulting in temperature-induced differences in the expansion behavior of the rotary roller bearing 8th , in particular of the bearing outer ring 12 of the rotary roller bearing 8th , on the one hand, and the case 1 in the support area 16 of the rotary roller bearing 8th on the other hand balances.

The at least partially compliant, in particular resilient design of the receiving cage 10 but can also be used to vibration damping during operation of the drive assembly 3 provide.

Finally, the at least partially compliant, in particular resilient design can be used to a frictional engagement with the rotary roller bearing 8th and / or to the housing 1 provide. Here is the recording cage 10 at the in the 3 and 4 illustrated and so far preferred embodiments in the manner of a staple spring with a resilient, the rotary bearing 8th receiving clip portion 19 designed.

In principle, it is conceivable that the receiving cage 10 with latching formations 20 equipped so that the receiving cage 10 - at least also - latching with the rotary roller bearing 8th connected is. Such Rastausformungen 20 are only indicated in the illustrated embodiments.

Additionally, it is at the in 3 shown embodiment provided that the receiving cage 10 over inserted, not shown interlocking elements with the rotary roller bearing 8th , in particular with the bearing outer ring 12 of the rotary roller bearing 8th , is engaged.

In the in the 1 . 2 and 5 illustrated and so far preferred embodiment is the receiving cage 10 about deformed, bent over here attachment sections 21 with the rotary roller bearing 8th engaged. Conceivable here is also a forming by crimping or crimping the respective attachment sections 21 , With the attachment of the rotary roller bearing 8th in the recording cage 10 By forming can be with little effort a particularly secure attachment of the bearing outer ring 12 of the rotary roller bearing 8th to reach.

In a particularly preferred embodiment, the receiving cage 10 latching with the housing 1 connected. For this is or are the receiving cage 10 and / or the housing 1 equipped with corresponding, not shown Rastausformungen here.

At the in 3 illustrated, preferred embodiment is the receiving cage 10 over inserted positive locking elements 22 with the housing 1 engaged. In the form-locking elements 22 These are dowel pins, which are substantially perpendicular to the drive shaft 3 extend.

It is also conceivable that the receiving cage 10 over deformed, in particular flanged, bent or crimped mounting portions with the housing 1 engaged. This corresponds to that in the 1 . 2 and 5 illustrated attachment of the bearing outer ring 12 of the rotary roller bearing 8th at the reception cage 10 ,

There are also other types of mounting of the receiving cage 10 on the housing 1 conceivable. At the in 4 illustrated embodiment, it is for example so that the motor housing 15 , here the pole pot, the receiving cage 10 against the own elasticity of the receiving cage 10 in 4 pushes to the right in the illustrated holding position.

In all illustrated embodiments, it is such that the receiving cage 10 completely in the gearbox 14 is arranged. It is also conceivable that the receiving cage 10 in the motor housing 15 , especially in the pole pot 15 , protrudes. This is especially advantageous when the receiving cage 10 with components of the drive motor 2 is engaged, as will be explained.

In the illustrated and insofar preferred embodiments, the drive motor 2 designed as a DC motor, a brush holder 23 with commutator brushes 24 having. The commutator brushes 24 are a commutator 25 assigned, in a conventional manner with the on the rotor 9 located rotor windings is electrically coupled.

The recording cage 10 forms with the rotary roller bearing 8th preferably a preassembled unit. This means that as part of a pre-assembly the rotary bearing 8th first in the receiving cage 10 can be used and that subsequently the receiving cage 10 together with the rotary bearing 8th in the case 1 the drive module can be used. It may be provided that the rotary bearing 8th already on the drive shaft 3 is arranged as in 2 shown.

In a further preferred embodiment, the brush holder is also part of the pre-assembly 23 on the receiving cage 10 fixable, so that the receiving cage 10 together with the Rotationswälzla ger 8th and the brush holder 23 can be mounted.

For the case of fixing the brush holder, not shown 23 at the reception cage 10 in the context of a pre-assembly, it is preferably such that in the preassembled state, the commutator brushes 24 initially in a mounting position, in which they still disengaged from the commutator 25 are. Only during the insertion of the receiving cage 10 in the case 1 fall the commutator brushes 25 into an operating position and thus come into engagement with the commutator 25 ,

For holding the commutator brushes 24 is at the clip sections 19 of the receiving cage 10 Preferably, a headband or the like is provided, which during insertion of the receiving cage 10 in the case 1 disengaged from the commutator brushes 24 is adjusted. It is conceivable that after inserting the receiving cage 10 in the case 1 the drive assembly of the pole pot 15 of the drive motor 2 is mounted and that by the assembly of the pole pot 15 the on the brush holder 23 arranged commutator brushes 24 be removed from the mounting position and fall into the operating position. The commutator brushes 24 so be in the last possible moment with the commutator 25 brought into contact. This has the advantage of damaging the commutator brushes 24 during assembly is largely excluded.

If the drive shaft 3 should not be part of the above preassembled unit is initially mounting the drive cage for mounting the drive assembly 10 together with the rotary bearing 8th and optionally together with a brush holder 23 in the case 1 used. Only then can the drive shaft be lowered 3 with a press-in force in the bearing inner ring 11 in the case 1 used rotary roller bearing 8th Pressing. To damage the receiving cage 10 and the housing 1 to avoid when pressing, is a corresponding support of the bearing inner ring 11 necessary against the insertion force. For this purpose, at least in the unassembled state of the drive assembly in the housing 1 provided an outwardly leading channel, wherein for supporting the bearing inner ring 11 against the press-in force a support tool from the outside through the channel to the bearing inner ring 11 is vorschiebbar.

For the above support is here and preferably as Support tube trained support tool application, at least the drive shaft during the pressing operation partly encloses.

In the illustrated embodiments, an above channel for the introduction of a support tool is not provided. Only example is in 3 the potential extension range 26 of such a channel. The channel in the housing 1 allows the insertion of the particular designed as a support tube support tool in 3 from right to left in the case 1 into it. The support tool is on the longitudinal axis of the drive shaft 3 aligned.

To another doctrine, which has its own significance, is the above-mentioned method for assembling the proposed Drive assembly claimed. In all the above statements, which are suitable for describing the method may be referenced become.

It is essential that in the context of the already mentioned pre-assembly possibly on the drive shaft 3 arranged rotary bearings 8th first in a receiving cage 10 is inserted and that subsequently the receiving cage 10 together with the rotary bearing 8th in the case 1 the drive assembly is used.

With little manufacturing effort is the connection of the rotary bearing 8th with the receiving cage 10 realized by means of a locking connection mentioned above.

A particularly secure connection can, however, as already mentioned, by connecting the rotary roller bearing 8th with the receiving cage 10 by bending over fastening sections 21 to reach. Also conceivable here is the connection by crimping or crimping the fastening sections 21 ,

In a particularly preferred embodiment, as part of the pre-assembly and the drive motor 2 associated brush holder 23 to the receiving cage 10 fixed, with following this fixation of the receiving cage 10 together with the rotary bearing 8th and the brush holder 23 in the case 1 the drive assembly is used.

If the above-mentioned retaining tabs for the retention of Kommutatorbürsten 24 are provided in the mounting position, the proposed method is preferably as follows: After insertion of the receiving cage 10 in the case 1 the drive assembly becomes another housing part 15 , here the pole pot of the drive motor 2 , assembled. By mounting this further housing part 15 become the brush holder 23 arranged commutator brushes 24 removed from the mounting position and fall into the operating position. The associated advantages are apparent from the above explanations to the proposed drive assembly.

If in the proposed assembly method of the receiving cage 10 together with the rotary bearing 8th without drive shaft in the housing 1 the drive assembly is to be used, it is also preferably provided here, the bearing inner ring 11 of the rotary roller bearing 8th support as explained above. Reference may be made to the above statements.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3930144 C2 [0003]

Claims (33)

Drive assembly of a motor vehicle with a housing ( 1 ) and one in the housing ( 1 ) arranged drive motor ( 2 ) with drive shaft ( 3 ) and downstream transmission ( 4 ), wherein the drive shaft ( 3 ) a rotary rolling bearing ( 8th ) associated with the housing ( 1 ), characterized in that a receiving cage ( 10 ) for receiving the rotary roller bearing ( 8th ) and that the rotary antifriction bearing ( 8th ) over the receiving cage ( 10 ) on the housing ( 1 ) is supported. Drive assembly according to claim 1, characterized in that the rotary rolling bearing ( 8th ) a bearing inner ring ( 11 ), a bearing outer ring ( 12 ) and intermediate rolling elements ( 13 ) and that the receiving cage ( 10 ) the bearing outer ring ( 12 ). Drive assembly according to claim 1 or 2, characterized in that the housing ( 1 ) a transmission housing ( 14 ) for receiving transmission components ( 5 . 6 ) and that the housing ( 1 ) a motor housing ( 15 ) for receiving engine components ( 9 ), preferably that the motor housing ( 15 ) a pole pot ( 15 ) for receiving a rotor ( 9 ) of the drive motor ( 2 ). Drive assembly according to one of the preceding claims, characterized in that the housing ( 1 ) at least in the support region of the rotary roller bearing ( 8th ) consists of plastic, preferably, that the transmission housing ( 14 ) completely made of plastic. Drive assembly according to one of the preceding claims, characterized in that the drive shaft ( 3 ) a second warehouse ( 17 ) and that the second bearing ( 17 ) at one end of the drive shaft ( 3 ), in particular at one end of the pole pot ( 15 ) is arranged. Drive assembly according to claim 5, characterized in that the drive shaft ( 3 ) a third camp ( 18 ) and that the rotation roller bearing ( 8th ) between the second bearing ( 17 ) and the third camp ( 18 ) is arranged. Drive assembly according to claim 5 or 6, characterized in that the second bearing ( 17 ) and / or the possibly existing, third bearing ( 18 ) is designed as a plain bearing, in particular as a spherical bearing, or are. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) is designed as a sheet metal part, preferably, that the sheet thickness is in a range between about 0.4 mm and about 1.2 mm, in particular about 0.6 mm. Drive assembly according to one of the preceding claims, characterized in that the contact surface between the receiving cage ( 10 ) and the housing ( 1 ) greater than the contact surface between the bearing outer ring ( 12 ) and the receiving cage ( 10 ). Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) non-positively and / or positively with the rotary bearing ( 8th ) is engaged. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) positively and / or positively with the housing ( 1 ) is engaged. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) is at least partially compliant, in particular resilient, configured and thereby temperature-induced differences in the expansion behavior of the rotary bearing ( 8th ) on the one hand and the housing ( 1 ) in the support area ( 16 ) of the rotary roller bearing ( 8th ) on the other hand compensates. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) is at least partially compliant, in particular resilient, designed and thereby provides a vibration damping. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) is at least partially compliant, in particular resilient, configured and thereby a frictional engagement with the rotary rolling bearing ( 8th ) and / or to the housing ( 1 ), preferably that the receiving cage ( 10 ) in the manner of a staple spring with a spring-elastic, the rotary bearing ( 8th ) receiving clip portion ( 19 ) is configured. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) with latching formations ( 20 ) and that the receiving cage ( 10 ) latching with the rotary bearing ( 8th ) connected is. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) via inserted interlocking elements with the rotary bearing ( 8th ) in Intervention is. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) via deformed, in particular flanged, bent or crimped fastening sections ( 21 ) with the rotary antifriction bearing ( 8th ) is engaged. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) and / or the housing ( 1 ) with latching formations ( 20 ) and that the receiving cage ( 10 ) latching with the housing ( 1 ) connected is. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) via inserted form-locking elements ( 22 ) with the housing ( 1 ) is engaged. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) via formed, in particular flanged, bent or crimped mounting portions with the housing ( 1 ) is engaged. Drive assembly according to one of the preceding claims, characterized in that the motor housing ( 15 ) the receiving cage ( 10 ) against the inherent elasticity of the receiving cage ( 10 ) presses in a holding position. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ) completely in the gear housing ( 14 ), or that the receiving cage ( 10 ) in the motor housing ( 15 ), in particular in the pole pot ( 15 ) protrudes. Drive assembly according to one of the preceding claims, characterized in that the drive motor ( 2 ) is designed as a DC motor and a brush holder ( 23 ) with commutator brushes ( 24 ) and that the brush holder ( 23 ) with the receiving cage ( 10 ) is coupled. Drive assembly according to one of the preceding claims, characterized in that the receiving cage ( 10 ), the rotary antifriction bearing ( 8th ) and possibly the drive shaft ( 3 ) form a preassembled unit. Drive assembly according to claim 23, characterized in that the receiving cage ( 10 ), the rotary antifriction bearing ( 8th ), the brush holder ( 23 ) and possibly the drive shaft ( 3 ) forms a preassembled unit. Drive assembly according to claim 23 and optionally according to claim 24 or 25, characterized in that in the preassembled state, the commutator brushes ( 24 ) in a mounting position and only during the insertion of the receiving cage ( 10 ) in the housing ( 1 ) fall into an operating position and in engagement with the commutator ( 25 ) come. Drive assembly according to claim 2 and optionally one of claims 3 to moto, characterized in that for mounting the drive assembly, first the receiving cage ( 10 ) together with the rotary antifriction bearing ( 8th ) in the housing ( 1 ) and then the drive shaft ( 3 ) with a press-in force in the bearing inner ring ( 11 ) of the housing ( 1 ) rotary bearing ( 8th ) is einpressbar that, at least in the unmounted state of the drive assembly in the housing ( 1 ) an outwardly leading channel is provided and that for supporting the bearing inner ring ( 11 ) against the pressing force a support tool from the outside through the channel to the bearing inner ring ( 11 ) is vorschiebbar. Method for mounting a drive assembly of a motor vehicle, wherein the drive assembly is provided with a housing ( 1 ) and one in the housing ( 1 ) arranged drive motor ( 2 ) with drive shaft ( 3 ) and downstream transmission ( 4 ) and wherein the drive shaft ( 3 ) a rotary rolling bearing ( 8th ) associated with the housing ( 1 ) is supported, characterized in that in the context of a pre-assembly possibly on the drive shaft ( 3 ) arranged rotary bearings ( 8th ) first into a receiving cage ( 10 ) and then that the receiving cage ( 10 ) together with the rotary antifriction bearing ( 8th ) in the housing ( 1 ) of the drive assembly is used. A method according to claim 28, characterized in that in the context of the pre-assembly, the rotary roller bearing ( 8th ) by forming, in particular by beading, bending or crimping of fastening sections ( 21 ) with the receiving cage ( 10 ) is connected. A method according to claim 28 or 29, characterized in that during the pre-assembly also a the drive motor ( 2 ) associated brush holder ( 23 ) on the receiving cage ( 10 ) and that subsequently the receiving cage ( 10 ) together with the rotary antifriction bearing ( 8th ) and the brush holder ( 23 ) in the housing ( 1 ) of the drive assembly is used. A method according to claim 30, characterized in that after insertion of the receptacle me cage ( 10 ) in the housing ( 1 ) of the drive assembly another housing part ( 15 ), in particular the pole pot ( 15 ) of the drive motor ( 2 ), and that by mounting the further housing part ( 15 ) on the brush holder ( 23 ) arranged commutator brushes ( 24 ) are released from an assembly position and fall into an operating position. Method according to one of claims 28 to 31, characterized in that the rotary rolling bearing ( 8th ) a bearing inner ring ( 11 ) and a bearing outer ring ( 12 ) and that after insertion of the receiving cage ( 10 ) in the housing ( 1 ) the drive shaft ( 3 ) with a press-in force in the bearing inner ring ( 11 ) of the rotary roller bearing ( 8th ) is pressed and that for supporting the bearing inner ring ( 11 ) against the pressing force a support tool from the outside through a channel in the housing ( 1 ) to the bearing inner ring ( 11 ) is advanced. A method according to claim 32, characterized in that the support tool is formed as a support tube, the drive shaft ( 3 ) at least partially encloses during the Einpressvorgangs.