CN104242541A - Transmission-driving device - Google Patents

Abstract

The invention relates to a gear drive having a drive motor, the drive shaft of which is inserted into a gear housing with a partial area, wherein the drive shaft is arranged in a bearing on the side facing the gear housing, The bearing is accommodated in a substantially sleeve-shaped receiving element with a positive fit and a non-positive fit, which bearing is arranged in a receptacle of the transmission housing, wherein in the installed position in order to insert and position the receiving element on the transmission In the receptacle of the housing, the receiving element can be positioned in a first axial final position determined by the stop element of the drive motor, and wherein in the final position of the drive shaft in the transmission housing the receiving element can be moved by means of the displacement element Movement on the drive shaft into a second axial final position axially away from the at least one stop element.

Description

transmission - drive

technical field

The invention relates to a transmission drive according to the preamble of claim 1 .

Background technique

A transmission drive is known from DE 10 2011 081 043 A1 of the applicant. The transmission drive is used in a convenience drive in a motor vehicle, for example a window regulator drive, a seat adjustment drive, a sliding sunroof drive or the like. A transmission drive of this type is characterized by the use of an armature shaft with (screw) gear teeth, which is inserted into a transmission housing to which a drive motor (electric motor) is flanged. There, the gear teeth of the armature shaft mesh with mating gear teeth on a spur gear of a single-stage or multi-stage transmission. The armature shaft of the drive motor is typically mounted with three bearing arrangements, two of which are arranged at a small distance from the armature, while the third bearing arrangement supports the armature shaft in the area of the transmission housing. The end area of the pivot. In order to accommodate the middle bearing arrangement of the three bearing arrangements, the known transmission drive has a receiving element designed as a deep-drawn part, which surrounds the bearing arrangement on its circumference with a non-positive fit. Mounting of known drives is carried out in several steps, wherein in a first step the drive motor is provided with a receiving device and associated bearings. The structural unit preassembled in this way is then inserted into the transmission housing, and finally the receiving element is moved from the preassembled position into the axial end position. This is achieved in the prior art in particular by means of a plug connection which is fixed from the outside on the transmission drive unit or a housing cover which is used as a displacement element and which engages into a recess configured as a receiving device during assembly. in the notch and positioned in a defined angular position. In order to prevent the receiving element from being lost or dislodged from the bearing device during the mounting process, the bearing device is fixed in the axial pre-mounting position during the mounting process by means of a plurality of locking hook elements, which are formed integrally on the brush holder . Although a corresponding receptacle (groove) for the respective locking element is provided for this purpose on the radially surrounding flange of the receptacle element, this receptacle should already be positioned angularly correctly relative to the armature shaft in the pre-assembled position The receiving element, however, has been found in practice to mount the receiving element in an angular position deviating from the predetermined angular position in the event of an incorrect installation. This is not often found during installation, so that during subsequent installation, depending on the configuration of the transmission-drive unit, there is the possibility that the engagement of the receiving element with the moving element can no longer be realized in order to move the receiving element to its axial direction in the final position.

Contents of the invention

On the basis of the prior art described, the object of the present invention is to improve the transmission-drive according to the preamble of claim 1, thereby eliminating the above-mentioned wrong installation, that is to say, to always install the receiving element in its predetermined angular position and exclude other angular positions. According to the invention, this is achieved in a transmission drive having the features of claim 1 in that the receiving element is designed in such a way that the receiving element can only be mounted in certain angular positions relative to the drive motor.

Advantageous refinements of the transmission drive according to the invention are specified in the dependent claims.

In order to facilitate the above-mentioned pre-installation of the transmission drive and in particular to avoid loss of receiving elements, it is provided in a structurally particularly preferred embodiment of the invention that at least one, preferably A plurality of locking elements, which are elastically deformable in the radial direction with respect to the longitudinal axis of the drive shaft of the drive motor and engage in the pre-mounted position a section of the receiving element, preferably a fixing flange, for limiting the receiving element relative to the Axial movability of the drive motor.

For the angularly correct mounting of the receiving element on the drive motor, it is proposed according to the invention that the receiving element or the drive motor comprises at least one positioning element which positively engages with a mounting formed on the drive motor or the receiving element. In a recess or notch.

In a structurally particularly preferred configuration of the positioning element, it is provided that the positioning element is designed in the form of a pin, that the positioning element is integrally formed on the brush holder or the brush holder arrangement of the drive motor, and that the recess is arranged on the deep-drawn part. in the receiving element.

Structurally, the recess required for accommodating the positioning element can be configured in the shape of a groove. This embodiment achieves a radially smallest mounting flange.

In a particularly preferred configuration of the positioning element it is provided that the positioning element projects axially beyond the one or more locking elements on the side facing the transmission housing. This ensures that the receiving element is connected to the locking element only when the receiving element is first mounted in the correct angular position. This is achieved in particular by the fact that the locking element is exactly aligned with the corresponding receptacle for the locking element (for example also in the form of a groove on the fastening flange), and in particular avoids problems caused by incorrect angular prepositioning of the receiving element. possible damage to the locking elements. There is thus no need for a mechanically particularly robust, ie, for example particularly large in cross-section, construction of the locking element, since it is ensured that the locking element is effectively connected to the receiving element in the correct angular or defined position.

Another constructively preferred embodiment of the present invention provides that two positioning elements and two locking elements are provided, wherein the positioning elements and locking elements are each arranged offset from each other by 180°, and wherein the positioning elements are respectively arranged at a distance relative to the locking element. 90° offset from each other. This arrangement enables a particularly kinematically efficient and meaningful prepositioning of the receiving element and, due to (only) a total of four elements, securely fixes the receiving element by means of the locking element at an overall low cost.

In order to minimize the structural dimensions of the receiving element it can be provided that the locking element is arranged between two radially outwardly projecting projections of the fastening flange of the receiving element. This means that the fastening flange can have a smaller diameter outside the projection of the fastening flange in the circumferential direction. Such projections are preferably formed on the receiving element designed as a deep-drawn part by a punching process.

Description of drawings

Additional advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and from the drawings. The figure shows:

Figures 1 and 2 show in perspective views the components of the drive motor of the transmission-drive device before and after mounting the brush holder device and the receiving element,

FIG. 3 shows a perspective view of the drive motor according to FIG. 2 prior to installation in the transmission housing,

FIG. 4 shows a perspective view of the drive motor already installed in the modified transmission housing before the transmission housing is closed by means of the transmission cover,

5 and 6 show in longitudinal section the region of the receiving element for the bearing in the region of the gearbox housing before and after installation of the gearbox housing cover.

Identical components or components with the same function have the same reference symbols in the figures.

Detailed ways

FIG. 4 shows the main components of a transmission-drive unit 10 according to the invention, which is used, for example, as a convenience drive (Komfortantrieb) in a motor vehicle, such as a window lifter drive, a sliding sunroof An integral part of a drive, seat adjustment drive or similar drive. The transmission drive 10 comprises a drive motor 11 designed as a (mechanically commutated) electric motor, which is connected to or flanged to a transmission housing 12 . The transmission housing 12 has, for example, a housing-shaped lower part 13 , the partially open upper side 14 of which can be closed by means of a transmission housing cover 15 , in particular by means of a screw connection or locking connection not shown in detail. .

The transmission housing 12 likewise has an opening 17 ( FIG. 3 ) in the orientation of the longitudinal axis of the drive motor 11 only for example, which serves as an insertion opening for inserting the plug-in electronics with the plug arranged thereon. (not shown), the plug is used to make contact with the cable harness of the motor vehicle. A single-stage or multi-stage transmission is arranged in the transmission housing 12 , which has a spur gear 18 with outer gear teeth 19 , which can be seen in FIG. 4 . The spur gear 18 also has an entrainment section 21 protruding outward from the upper side of the transmission housing 12 , which is at least indirectly in contact with an element to be adjusted of the transmission drive 10 , in particular a vehicle window, a sliding sunroof or The seat is connected.

The outer toothing 19 of the spur gear 18 meshes with a toothing segment 22 of the drive shaft 23 of the drive motor 11 , which is designed as a drive screw. For this purpose, a subregion 25 protruding outwards from the housing 24 of the drive motor 11 protrudes into the transmission housing 12 , for which purpose the transmission housing 12 , in the exemplary embodiment shown, the lower part 13 An annular receptacle 27 is provided, into which subregion 25 of drive motor 11 can be inserted.

As can be seen in particular from FIGS. 1 and 2 , the drive motor 11 includes an armature, which is not visible in the drawing, arranged inside the housing 24 , wherein the armature shaft 28 simultaneously forms the drive shaft 23 . A brush holder device 30 can be mounted in the axial direction on the armature shaft 28 , which is fixed in its axial position by a press fit in the housing 24 . Also arranged on the armature shaft 28 is a bearing 32 , for example in the form of a spherical cap bearing, the axial position of which is fixed in each position by a fixing ring 31 arranged on the armature shaft 28 . The bearing 32 is accommodated in a substantially sleeve-shaped receiving element 35 , which surrounds the outer circumference of the bearing 32 in a form-fitting and force-fitting manner in such a way that the bearing 32 is fixed radially in the receiving element 35 . Correspondingly, the inner diameter of the bearing 32 or the outer diameter of the armature shaft 28 is dimensioned such that the bearing 32 can move axially on the armature shaft 28 without changing its position within the receiving element 35 .

The receiving element 35 is preferably formed from a sheet metal and is designed as a deep-drawn part. On the side facing the housing 24 of the drive motor 11, the receiving element 35 has a radially surrounding flange 36, which, as can be seen especially from FIG. groove-shaped recesses 37, of which only two recesses 37 can be seen in FIG. 1 . What is important is that this recess 37 does not protrude radially into the cylindrical region 38 of the receiving element 35 , but instead remains a fastening edge 39 ( FIGS. 5 and 6 ). The recess 37 can be formed on the receiving element 35 in particular by means of a punching process step. In addition, the recesses 37 can also be configured differently, wherein, however, two recesses 37 which are arranged offset by 180° from one another are each configured identically. Furthermore, it can be seen from the combination of FIGS. 1 , 5 and 6 that the brush holder device 30 has two locking hooks 41 arranged offset by 180° from each other on the end side facing the receiving element 35 and two locking hooks 41 arranged offset by 180° from each other. locating pin 42, wherein the cross-sections in FIGS. 5 and 6 are selected in such a way that not only the locking hook 41 but also the locating pin 42 can be seen. Both the locking hook 41 and the positioning pin 42 are preferably integrally formed on the brush holder device 30 which is designed as an injection-molded part. In addition, the locking hooks 41 and the positioning pins 42 are arranged offset from each other by 90°.

The locking hook 41 and the positioning pin 42 , each extending at least substantially parallel to the drive shaft 23 , are arranged in their angular position in alignment with the recess 37 on the flange 36 of the receiving element 35 and are intended to be positioned relative to the brush during installation. The rack device 30 mounts the receiving element 35 angularly correctly and fixes the receiving element 35 axially. For this purpose, the locking hook 41 is designed such that it is elastically deformable radially outward with respect to the longitudinal axis of the armature shaft 28 , so that the locking hook 41 is radially outward during a relative movement of the locking hook 41 and the receiving element 35 Displaced and engages behind the fastening edge 39 of the recess 37 , so that the receiving element 35 can no longer be axially removed or detached from the brush holder device 30 . As can also be seen in particular from FIGS. 5 and 6 , it is essential that the length L of the positioning pin 42 is greater or longer than the length l of the locking hook 41 . This ensures that the locking hook 41 can only interact with its associated recess 37 when the positioning pin 42 is first inserted into its associated recess 37 . Finally, the sleeve-shaped gear element 45 carrying the gear segment 22 can be pushed onto the armature shaft 28 and connected there, for example by means of a crimp connection or laser welding.

The drive motor 11 described here can be connected to the transmission housing 12 in the direction of the arrow 46 according to FIG. 3 by inserting the partial region 25 of the drive shaft 23 into the receptacle 27 . According to FIG. 4 , the spur gear 18 is then mounted in the transmission housing 12 by being plugged onto the shaft 47 , wherein at the same time a meshing is produced between the outer gear teeth 19 of the spur gear 18 and the gear tooth segment 22 of the drive shaft 23 .

FIG. 5 shows the state in which the drive shaft 23 of the drive motor 11 is located in the transmission housing 12 shortly before reaching its axial end position. Furthermore, FIG. 5 also shows the state in which the receiving element 35 is in the installed position, which was present before the partial region 25 was inserted into the transmission housing 12 . In particular, it can be seen that the radially surrounding flange 36 of the receiving element 35 rests with an end face 48 on an opposite end face 49 of the brush holder device 30 . The receiving element 35 is thus in direct abutting contact with the brush holder device 30 . This position is the first axial final position of the receiving element 35 on the drive shaft 23 . Furthermore, the bearing 32 bears against the fastening ring 31 .

As mentioned above, the flange 36 of the receiving element 35 is clamped from behind by fixing elements arranged at a uniform angular distance from each other in the form of locking hooks 41 which limit the movement of the receiving element 35 on the drive shaft 23 along the Axial movability of the brush holder device 30 in opposite directions.

Furthermore, on the side of the bearing 32 opposite the flange 36 in FIG. 5 , a recess 51 can be seen in the wall of the receiving element 35 , which recess is designed in the form of a perforation and which is in contact with The (open) opening of the lower part 13 of the transmission housing 12 is aligned. Aligned with or overlapping the recess 51 , the annular receptacle 27 of the transmission housing 12 has a perforation 52 in the wall of the receptacle 27 , through which a displacement element in the form of a projection 53 passes, which is integrally formed. Formed on the underside of the second transmission housing cover 15 . The projection 53 has two chamfers or bevels 54 , 55 on the side facing the opening 52 or the recess 51 . Furthermore, the width of the projection 53 is adapted to the width of the bore 52 such that the bore 52 forms a guide for the projection 53 according to the arrow 56 when the transmission housing cover 15 is inserted into the bore 52 .

FIG. 5 shows the state in which the bevel 54 is just in abutment contact with the associated edge 57 of the recess 51 of the receiving element 35 according to the direction of the arrow 56 when the transmission housing cover 15 is mounted. As can be seen from FIG. 6 , when the transmission housing cover 15 is pressed further downwards in the direction of arrow 56 , the protrusion 53 is completely inserted into the recess 51 , which results in that the receiving element 35 rests on the armature in the direction of arrow 58 . The shaft 28 is moved axially so that a gap 59 is formed between the end face 48 of the flange 36 and the opposite end face 49 of the brush holder device 30 . The receiving element 35 is decoupled from the brush holder device 30 via the gap 59 , which results in a noise decoupling of the receiving element 35 and a mechanical relief of the brush holder device 30 .

In FIG. 6 , the receiving element 35 is thus arranged in its (second) axial end position on the armature shaft 28 . In particular by screwing or locking the transmission housing cover 15 to the lower part 13 of the transmission housing 12 , it is ensured that this axial end position of the receiving element 35 does not change during operation of the transmission drive 10 .

In the embodiment of the invention shown in FIGS. 5 and 6 , the second axial finality of the receiving element 35 is ensured by a displacement element designed in the form of a protrusion 53 integrally formed on the transmission housing cover 15 . Location.

The transmission drive 10 can be modified or modified in various ways without departing from the inventive concept. This consists in that the receiving element 35 can only be mounted in certain angular positions relative to the drive motor 11 or the brush holder device 30 by correspondingly arranging or configuring the locking hook 41 and the positioning pin 42 in the pre-installation position. It is conceivable, for example, that instead of the radially completely surrounding flange 36 on the receiving element 35 , short radially outwardly projecting projections are provided, so that there is no flange 36 outside the projections, between which positioning pins are arranged. 42 and locking hook 41.

Claims (11)

1. transmission-drive unit (10), there is CD-ROM drive motor (11), the driving shaft (23) of described CD-ROM drive motor utilizes subregion (25) to be inserted in transmission mechanism housing (12), wherein said driving shaft (23) is arranged in bearing (32) on the side towards described transmission mechanism housing (12), described bearing configuration ordinatedly and power be contained in ordinatedly substantially in sleeve shaped receiving element (35) in, and wherein said bearing (32) is arranged in the receptacle (27) of transmission mechanism housing (12)

It is characterized in that,

Described receiving element (35) so constructs, and described receiving element only can be arranged on about CD-ROM drive motor (11) in the angle position determined.

2. by transmission-drive unit according to claim 1,

It is characterized in that,

Described CD-ROM drive motor (11) is arranged at least one, preferred multiple locking member (41), described locking member radially can flexibly be out of shape about the longitudinal axis of the driving shaft (23) of described CD-ROM drive motor (11), and in pre-installed position, engage portion's section of described receiving element (35), preferably mounting flange (36), for limiting the axial displaceability of described receiving element (35) relative to described CD-ROM drive motor (11).

3. by the transmission-drive unit described in claim 1 or 2,

It is characterized in that,

Described receiving element (35) or described CD-ROM drive motor (11) comprise at least one setting element (42), join to described setting element form fit in a recess (37) be configured on described CD-ROM drive motor (11) or described receiving element (35).

4. by transmission-drive unit according to claim 3,

It is characterized in that,

Described setting element (42) is formed pin-shapedly,-wherein said setting element (42) is preferably arranged at least substantially parallel to described driving shaft (23),-and described setting element (42) be formed on the brush bracket device (30) of described CD-ROM drive motor (11), and described recess (37) is arranged in and is configured on the receiving element (35) of deep-draw parts.

5. by the transmission-drive unit described in claim 3 or 4,

It is characterized in that,

The shape of described recess (37) structure grooving.

6. by the transmission-drive unit according to any one of claim 2 to 5,

It is characterized in that,

Described setting element (42) exceedes described one or more locking member (41) vertically on the side towards described transmission mechanism housing (12).

7. by the transmission-drive unit according to any one of claim 3 to 6,

It is characterized in that,

Two setting elements (42) and two locking members (41) are set, wherein said setting element (42) and described locking member (41) are arranged with 180 ° respectively with mutually staggering, and wherein said setting element (42) is arranged with 90 ° respectively relative to described locking member (41) with mutually staggering.

8. by the transmission-drive unit according to any one of claim 2 to 7,

It is characterized in that,

Described setting element (41) is arranged between two projections of radially outward giving prominence to of the mounting flange (36) of described receiving element (35).

9. by the transmission-drive unit according to any one of claim 1 to 8,

It is characterized in that,

In order to described receiving element (35) being inserted and being positioned in the receptacle (27) of transmission mechanism housing (12) in installation site, in the first axial final position that the stop element (30) that described receiving element (35) can be positioned through described CD-ROM drive motor (11) is determined, and wherein in transmission mechanism housing (12) described driving shaft (23) final position in, described receiving element (35) can be moved on described driving shaft (23) by means of moving meter (53) and axially leave in the second axial final position of at least one stop element (30).

10. by the transmission-drive unit according to any one of claim 1 to 9,

It is characterized in that,

Described receiving element (35) have one with radial loop around the region (38) of wall, and in described wall, construct at least one recess (51), described recess in order to move axially described receiving element (35) and with described moving meter (53) acting in conjunction, wherein said moving meter (53) is configured to the protuberance on the cap member (15) of described transmission mechanism housing (12).

11. by the transmission-drive unit according to any one of claim 1 to 10,

It is characterized in that,

Described moving meter (53) or recess (51) have at least one inclined-plane (54,55), and described inclined-plane causes moving axially of described receiving element (35) when described moving meter (53) works.