Motor vehicle drive

Abstract

The invention relates to a motor vehicle drive (1) having a drive housing (2), a drive motor (4) arranged in the drive housing (2), a drive shaft (6) comprising a first shaft section (7) having a first free longitudinal end (8) and a second shaft section (10) having a second free longitudinal end (11), and a drive worm (14) formed on the first shaft section (7) of the drive shaft (6). A mechanical compensation element (16) is mounted on the drive housing (2) and arranged on the first free longitudinal end (8) of the drive shaft (6), wherein the mechanical compensation element (16) allows the drive shaft (6) to move relative to the drive housing (2) in a direction pointing from the second motor side (12) to the first motor side (9) against a compensation force exerted by the mechanical compensation element (16) and to press the first free longitudinal end (8) of the drive shaft (6) in a direction towards the second motor side (12).

Description

Technical Field

[0001] The present invention relates to a motor vehicle drive device having a drive housing, an electric drive motor with a motor housing disposed within the drive housing, and a drive shaft extending through the motor housing. The drive shaft has a first shaft section and a second shaft section. The first shaft section has a first free longitudinal end and extends from the motor housing on the first motor side. The second shaft section extends from the motor housing on the second motor side opposite to the first motor side with a second free longitudinal end. The drive shaft also has a drive worm gear constructed on the first shaft section of the drive shaft. Background Technology

[0002] As is known in the art, the aforementioned type of motor vehicle drive unit, for example as an electric micro-actuator, is used in motor vehicles for example for the extension and retraction of vehicle locks, auxiliary door locks, or flush-mounted exterior door handles. When using a flush-mounted exterior door handle, the drive shaft of the electric drive motor experiences alternating axial loads during operation, from acceleration and braking to the reverse position as the door handle switches from extended to retracted. In known motor vehicle drive units, if the drive shaft has axial longitudinal clearance between inflexible axial stops fixed within the drive housing, the axial load introduced into the drive shaft results in undesirable noise generation. Summary of the Invention

[0003] Based on this task, the present invention provides a solution that offers an improved motor vehicle drive system with enhanced operator comfort in a structurally simple manner, thereby avoiding the aforementioned disadvantages, wherein the vehicle owner does not perceive noise generated due to alternating axial loads on the drive shaft.

[0004] In the aforementioned type of motor vehicle drive system, according to the invention, this task is solved by a mechanical compensation element mounted on the drive housing and arranged on the first free longitudinal end of the drive shaft, wherein the mechanical compensation element allows the drive shaft to move relative to the drive housing against the compensating force applied by the mechanical compensation element in the direction from the second motor side to the first motor side and to press the first free longitudinal end of the drive shaft toward the second motor side.

[0005] Advantageous and suitable embodiments and improvements of the invention are derived from the dependent claims.

[0006] This invention provides a motor vehicle drive system characterized by a simple and inexpensive structure, thus avoiding noise caused by alternating axial loads on the drive shaft. Because the mechanical compensation element allows the drive shaft to move relative to the drive housing against a compensating force applied by the mechanical compensation element in a direction from the second motor side to the first motor side, while simultaneously pressing the first free longitudinal end of the drive shaft towards the second motor side, it is ensured that the drive shaft is arranged without backlash within the drive housing and does not generate noise due to alternating axial loads. Here, the mechanical compensation element can, for example, resist the pressing of the second free longitudinal end of the drive shaft against an axial stop constructed within the drive housing. Therefore, according to the invention, the drive shaft can perform axial deflection during operation without backlash at the first and second free longitudinal ends of the drive shaft, and the mechanical compensation element provides the desired backlash-free performance of the drive shaft through its compensating force acting on the first free longitudinal end of the drive shaft.

[0007] In an embodiment of the invention, the drive housing has a stop wall and a limiting element. The stop wall has a recess in which a first free longitudinal end of the drive shaft is disposed. A mechanical compensation element is arranged between the stop wall and the limiting element. Therefore, unlike the prior art, the present invention does not have a stop for the drive shaft, but instead has a stop wall and a limiting element that act as stops for the mechanical compensation element, which can function between them to exert a compensating force.

[0008] To ensure sufficient durability of the mechanical compensating element, an advantage of this embodiment is that the mechanical compensating element has a contact element made of a wear-resistant material that abuts against a first free longitudinal end of the drive shaft, and is movable between a first position and a second position. In the first position, the contact element abuts against a stop wall portion, and in the second position, the contact element is spaced apart from the stop wall portion. The mobility of the contact element between the first and second positions allows the drive shaft to deflect without clearance in the longitudinal direction. Here, the second position can be a position where the contact element abuts against a limiting element, thereby limiting the maximum deflection of the drive shaft by the distance between the stop wall portion and the limiting element.

[0009] In this embodiment of the invention, a particularly advantageous structural feature is that the contact element is designed as a spring sheet, which is force-locked (kraftschlüssig) fastened to the driver housing. The spring sheet allows the drive shaft to be preloaded into the driver housing during the installation of the electric drive motor. Thus, the drive shaft can resist preloaded deflection.

[0010] In an embodiment of the invention, the contact element is specified to have the shape of a seat bracket, having a seat surface and a backrest, wherein a first free longitudinal end of the drive shaft rests against the backrest of the contact element. In this way, the backrest is used for backlash-free deflection of the drive shaft, while the seat surface can, for example, be used to secure the contact element to the drive housing.

[0011] Regarding the limited installation space, in another embodiment of the invention, a through hole is constructed in the seat surface, and a limiting element extends through the through hole parallel to the back surface.

[0012] To simplify the installation of the contact element on the driver housing, in an embodiment of the invention, the seat surface is provided to have at least one retaining claw that protrudes laterally from the seat surface and extends obliquely to the seat surface, wherein the seat surface is inserted into the receiving perimeter of the receiving portion constructed by the driver housing in such a way that at least one retaining claw grips the receiving perimeter of the receiving portion.

[0013] As an alternative to using the contact element as the spring sheet, the present invention specifies that a compensation mechanism capable of elastic deformation is arranged between the contact element and the limiting element.

[0014] In this alternative implementation, the contact element can be a baffle, and the elastically deformable compensation mechanism can be constructed in the form of a sheet and can be attached to a limiting element designed as a wall.

[0015] As another alternative, in embodiments of the present invention, it is also conceivable that the contact element has a bottom side abutting against the stop wall in a first position and two motion limiting arms extending from the bottom side toward the limiting element, which are arranged spaced apart from the stop wall in a second position.

[0016] According to another alternative, the fastening of the elastically deformable compensation mechanism is advantageous in that the elastically deformable compensation mechanism is arranged between two motion limiting arms and has a retaining connecting piece and a deformable section, wherein the retaining connecting piece is form-locked in a retaining recess constructed within the actuator housing.

[0017] The elastically deformable compensation mechanism can be compressed in the second position. However, pure deformation of the elastically deformable compensation mechanism is also conceivable, and thus, in the embodiments of the invention, it is specified that in the second position, the volume formed between the two motion limiting arms is greater than the volume of the elastically deformable compensation mechanism arranged in the second position.

[0018] A particularly inexpensive manufacturing solution can be achieved by manufacturing the elastically deformable compensation mechanism from a first plastic and the actuator housing from a second plastic using two-component injection molding. Two-component injection molding allows for the combination of hard plastics (e.g., for the actuator housing) and soft plastics (e.g., for the elastically deformable compensation mechanism).

[0019] When using an electric drive motor, which rotates not only in a first direction of rotation but also in a direction opposite to the first direction of rotation (e.g., for the extension and retraction of a flush door handle), there is a risk that the drive shaft may deflect away from the mechanical compensation element, potentially creating interfering noise. To avoid this, in another embodiment of the invention, a mechanical supplementary compensation element is provided, mounted on the drive housing and arranged on the second free longitudinal end of the drive shaft. This mechanical supplementary compensation element allows the drive shaft to move relative to the drive housing in a direction from the first motor side to the second motor side against the compensating force applied by the mechanical supplementary compensation element and to press the second free longitudinal end of the drive shaft towards the first motor side. In this way, a preload in the form of a compensating force is applied to both free longitudinal ends of the drive shaft by the mechanical compensation element and the mechanical supplementary compensation element, where deflection of the drive shaft is entirely feasible, and one of the free longitudinal ends does not significantly impact the axial stop with considerable noise.

[0020] Here, the additional compensation element can be implemented as described above for the compensation element. Accordingly, in the embodiment of the invention, the drive housing has an additional stop wall portion (additional stop wall portion) and an additional limiting element (additional limiting element), the additional stop wall portion having a recess in which the second free longitudinal end of the drive shaft is disposed, wherein the mechanical additional compensation element is disposed between the additional stop wall portion and the additional limiting element.

[0021] As an embodiment of the additional compensation element, the present invention specifies that the mechanical additional compensation element has an additional contact element (additional contact element) made of wear-resistant material, which abuts against the second free longitudinal end of the drive shaft and is movable between a first position and a second position. In the first position, the additional contact element (additional contact element) abuts against an additional stop wall portion, and in the second position, the additional contact element is arranged spaced apart from the additional stop wall portion.

[0022] For additional contact elements (additional contact elements), in embodiments of the invention, the additional contact elements are designed as spring sheets that are force-locked fastened to the driver housing.

[0023] Regarding the drive shaft with its preload applied to its two free ends, in another embodiment of the invention, a compensating mechanism capable of elastic deformation is arranged between an additional contact element (additional contact element) and an additional limiting element (additional limiting element).

[0024] Furthermore, in embodiments of the present invention, an additional contact element is a baffle, and an additional elastically deformable compensation mechanism is constructed in the form of a sheet and abuts against an additional limiting element designed as a wall.

[0025] Finally, in an embodiment of the invention, an additional contact element (additional contact element) is provided, having a bottom side and two motion limiting arms extending from the bottom side toward the additional limiting element, the bottom side abutting against the additional stop wall in a first position, and the two motion limiting arms abutting against the additional limiting element in a second position.

[0026] It is understood that the features mentioned above and those to be elaborated below can be applied not only in the combinations described separately, but also in other combinations or individually, without departing from the scope of the invention. The scope of the invention is limited only by the claims. Attached Figure Description

[0027] Further details, features, and advantages of the subject matter of this invention will become apparent from the following description taken in conjunction with the accompanying drawings, which illustrate exemplary and preferred embodiments of the invention.

[0028] In the attached diagram:

[0029] Figure 1 A perspective view of the motor vehicle drive device of the present invention is shown;

[0030] Figure 2 Show Figure 1 The illustrated motor vehicle drive unit has its drive housing cover detached and arranged accordingly.

[0031] Figure 3 A top view shows an electric drive motor and a worm gear, housed within the drive housing of a motor vehicle drive unit;

[0032] Figure 4 A perspective detail view of a mechanical compensation element according to a first embodiment of a motor vehicle drive system is shown;

[0033] Figure 5 The contact element of the mechanical compensation element according to the first embodiment of the motor vehicle drive system is shown in perspective view;

[0034] Figure 6 Showing according to Figure 5 Another perspective view of the contact element;

[0035] Figure 7 Showing according to Figure 5 A side view showing various positions of the contact element;

[0036] Figure 8 A perspective detail view of a mechanical compensation element according to a second embodiment of a motor vehicle drive system is shown;

[0037] Figure 9A perspective view of the contact element and the elastically deformable compensation mechanism according to a second embodiment of a motor vehicle drive system is shown.

[0038] Figure 10 A perspective detail view showing the contact elements and the elastically deformable compensation mechanism;

[0039] Figure 11 A perspective detail view of a mechanical compensation element according to a third embodiment of a motor vehicle drive system is shown;

[0040] Figure 12 A perspective view shows a drive housing according to a third embodiment of a motor vehicle drive system, which has a retaining recess of a compensating mechanism capable of elastic deformation;

[0041] Figure 13 A perspective view shows a compensation mechanism capable of elastic deformation according to a third embodiment of a motor vehicle drive system;

[0042] Figure 14 A perspective view shows the contact element according to a third embodiment of a motor vehicle drive system;

[0043] Figure 15 A perspective detailed view of a mechanical compensation element according to a third embodiment of a motor vehicle drive system is shown, wherein the contact element is arranged at a position spaced apart from the stop wall portion of the drive housing;

[0044] Figure 16 A top view of a motor vehicle drive system according to a fourth embodiment is shown;

[0045] Figure 17 Show Figure 16 A top view showing the detailed area of ​​the vehicle drive system;

[0046] Figure 18 Show Figure 16 A perspective top view of the detailed area of ​​the vehicle drive unit shown; and

[0047] Figure 19 Show Figure 18 Another perspective top view of the detailed area of ​​the vehicle drive unit shown. Detailed Implementation Plan

[0048] Figures 1 to 3 The present invention illustrates a motor vehicle drive device 1, which has a drive housing 2, wherein the drive housing is in Figure 1 The middle shell is closed by cover 3. Figure 2 In the middle, the cover 3 is removed from the driver housing 2, thereby connecting it. Figure 3As can be seen, the vehicle drive unit 1 also includes an electric drive motor 4 with a motor housing 5 and a drive shaft 6, wherein the electric drive motor 4 and the drive shaft 6 are arranged and housed together within the drive housing 2. Figure 3 As shown, the drive shaft 6 passes through the motor housing 5, wherein the drive shaft 6 has a first shaft section 7 and a second shaft section 10. The first shaft section has a first free longitudinal end 8 and extends from the motor housing 5 on a first motor side 9, and the second shaft section extends from the motor housing 5 on a second motor side 12 opposite to the first motor side 9 with a second free longitudinal end 11. Here, the drive worm gear 14 is constructed on the first shaft section 7 of the drive shaft 6 and drives the worm wheel 15, which is rotatably supported within the driver housing 2.

[0049] according to Figure 3 The present invention, shown only schematically, further includes a mechanical compensating element 16 mounted on the drive housing 2. The mechanical compensating element 16 is arranged on the first free longitudinal end 8 of the drive shaft 6 and allows the drive shaft 6 to move relative to the drive housing 2 against a compensating force applied by the mechanical compensating element 16 in the direction from the second motor side 12 to the first motor side 9, wherein the mechanical compensating element 16 presses the first free longitudinal end 8 of the drive shaft 6 toward the second motor side 12. The mechanical compensating element 16 is thus configured to allow the drive shaft 6 to deflect in the direction from the second motor side 12 to the first motor side 9, wherein, in the case of such deflection of the drive shaft 6, the mechanical compensating element 16 applies a compensating force to the deflected first free longitudinal end 8 of the drive shaft 6 and uses this compensating force to press the first free longitudinal end 8 toward the second motor side 12. The following describes various embodiments. Figures 4 to 15 More detailed descriptions of the mechanical compensation element 16, in which, Figures 4 to 7 The first embodiment is shown. Figures 8 to 10 The second embodiment is shown, and Figures 11 to 15 The third embodiment is shown.

[0050] exist Figures 4 to 7 In the first embodiment shown, the drive housing 2 has a stop wall portion 17 and a limiting element 18, which are designed as parts of the wall portion of the drive housing 2. Here, a recess 19 is constructed within the stop wall portion 17, in which the first free longitudinal end 8 of the drive shaft 6 is arranged. Figure 4 As can be seen in the example, the mechanical compensation element 16 is arranged between the stop wall portion 17 and the limiting element 18. The mechanical compensation element 16 has a contact element 20 made of a wear-resistant material. Figure 7As can be seen, the contact element 20 abuts against the first free longitudinal end 8 of the drive shaft 6, wherein the contact element 20 can move between a first position (in which the contact element 20 abuts against the stop wall portion 17) and a second position (in which the contact element 20 is spaced apart from the stop wall portion 17). Here, the second position may be the position where the contact element 20 abuts against the limiting element 18, so that the maximum deflection of the drive shaft 6 is limited by the distance between the stop wall portion 17 and the limiting element 18.

[0051] Especially as in the first embodiment Figure 5 and Figure 6 As shown, the contact element 20 is designed as a spring sheet 21. The contact element 20, designed as a spring element 21, is force-locked to the drive housing 2, wherein the contact element 20 has the shape of a seat bracket with a seat surface 22 and a backrest 23. Figures 4 to 7 According to the combination, the first free longitudinal end 8 of the drive shaft 6 abuts against the back surface 23 of the contact element 20. Figure 7 Specifically, it is shown that when the drive shaft 6 deflects toward the limiting element 18, only the back surface 23 of the contact element 20 moves toward the limiting element 18; conversely, the seat surface 22 of the contact element 20 remains in its position. As shown in... Figure 5 and Figure 6 It is also known that a through hole 24 is constructed within the seat surface 22, through which a limiting element 18 extends. Here, the limiting element 18 extends substantially parallel to the back surface 23. In order for the contact element 20 to be force-locked fastened to the driver housing 2, in the first embodiment, the driver housing 2 is provided to have a receiving portion perimeter 26. The size of the receiving portion perimeter 26 matches the bottom surface of the seat surface 22, so that the fixing claws 25, which laterally protrude from the seat surface 22 and are inclined to extend in the direction of the seat surface 22, grip the receiving portion perimeter 26, thereby force-locking the contact element 20 to the driver housing 2. In the first embodiment, the stop wall portion 17 is designed as a section of the receiving portion perimeter 26. It can be understood that, instead of a large number of fixing claws 25, a single fixing claw 25 is sufficient to fasten the contact element 20 to the driver housing 2. With the mechanical compensation element 16 installed, the first free longitudinal end 8 of the drive shaft 6 presses against the contact element 20, so that the spring sheet 21 is deflected toward the limiting element 18, and thus the mechanical compensation element 16 is under predetermined preload.

[0052] for Figures 8 to 15 The two embodiments shown, namely the second and third embodiments, are characterized in that an elastically deformable compensation mechanism 27 is arranged between the contact element 20 and the limiting element 18. In other words, in the second and third embodiments, the mechanical compensation element 16 includes a contact element 20 made of a wear-resistant material and an elastically deformable compensation mechanism 27.

[0053] exist Figures 8 to 10 In the second embodiment shown, the drive housing 2 further includes a stop wall portion 17 and a limiting element 18, which are formed by the wall portion of the drive housing 2. A recess 19 is also formed in the stop wall portion 17, within which the first free longitudinal end portion 8 of the drive shaft 6 is disposed. For example, by… Figure 8 As can be seen, the mechanical compensation element 16 is arranged between the stop wall portion 17 and the limiting element 18, which is designed as a wall portion. In the second embodiment, the mechanical compensation element 16 has a contact element 20 made of a wear-resistant material. Figure 8 The contact element 20 rests against the first free longitudinal end 8 of the drive shaft 6. The contact element 20 can also move again between a first position and a second position, in which the contact element 20 rests against the stop wall portion 17 (see above). Figure 8 In this second position, the contact element 20 is arranged spaced apart from the stop wall portion 17 (see...). Figure 10 In the second embodiment, the contact element 20 is a baffle 28, while the elastically deformable compensation mechanism 27 is constructed in a sheet shape. Furthermore, the elastically deformable compensation mechanism 27 rests against the limiting element 18, which is designed as a wall. When the drive shaft 6 deflects toward the limiting element 18, the first free longitudinal end 8 of the drive shaft 6 presses against the contact element 20, which is designed as a baffle 28, thereby causing the contact element 20 to rest against the stop wall 17 (see...). Figure 8 The first position moves toward the limiting element 18, where the elastically deformable compensation mechanism 27 is compressed (see...). Figure 10 In the second embodiment, the drive housing 2 has a receiving portion perimeter 26, within which a contact element 20 and an elastically deformable compensation mechanism 27 are movably arranged. Here, the stop wall portion 17 and the wall-shaped limiting element 18 are designed as corresponding sections of the receiving portion perimeter 26. In the installed state, the first free longitudinal end 8 of the drive shaft 6 presses against the contact element 20, thereby compressing the elastically deformable compensation mechanism 27, and thus placing the mechanical compensation element 16 under a predetermined preload. On the other hand, the mechanical compensation element 16 directly generates a compensation force after the drive shaft 6 or the drive motor 4 is assembled, thereby pressing the drive shaft 6 towards the second motor side 12.

[0054] The third embodiment is in Figures 11 to 15 As shown, the drive housing 2, as described above, has a stop wall portion 17 and a limiting element 18, which are designed as parts of the wall portion of the drive housing 2. A recess 19 is also constructed within the stop wall portion 17, where the first free longitudinal end 8 of the drive shaft 6 is disposed. For example, by… Figure 11As can be seen, the mechanical compensation element 16 is arranged between the stop wall portion 17 and the limiting element 18. The mechanical compensation element 16 (as in other embodiments) also has a contact element 20 made of a wear-resistant material. Figure 11 As shown, the contact element 20 abuts against the first free longitudinal end 8 of the drive shaft 6, wherein the contact element 20 is movable between a first position and a second position, in which the contact element 20 abuts against the stop wall portion 17 (see...). Figure 11 In this second position, the contact element 20 is arranged spaced apart from the stop wall portion 17 (see...). Figure 15 The second position can be, in particular, the position where the contact element 20 rests against the limiting element 18, such that the maximum deflection of the drive shaft 6 is limited by the gap between the stop wall portion 17 and the limiting element 18, as shown below. Figure 15 As shown.

[0055] For example, reference Figure 11 , 14 And 15, the contact element 20 has a bottom side 29 that abuts against the stop wall portion 17 in the first position (see 15). Figure 11 And two motion limiting arms 30 extending from the bottom side 29 toward the limiting element 18, which abut against the limiting element 18 in the second position with their free ends (see Figure 15 The contact element 20 is inserted into the receiving portion perimeter 26 constructed in the driver housing 2 and can move longitudinally along the drive shaft 6 within the receiving portion perimeter 26.

[0056] The mechanical compensation element 16 of the third embodiment also has a compensating mechanism 27 that can be elastically deformed. The elastically deformable compensating mechanism 27 is arranged between the two motion limiting arms 30 and has a retaining connecting piece 31 and a deformable section 32. Here, the retaining connecting piece 31 is form-locked into a retaining recess 33 constructed within the actuator housing 2. The elastically deformable compensating mechanism 27 can be manufactured from a first plastic and the actuator housing 2 can be manufactured from a second plastic by means of two-component injection molding. The walls defining the retaining recess 33 form guide sections 34 that guide the contact element 20 between the first and second positions. Here, the motion limiting arms 30 surround the guide sections 34, wherein the guide sections 34 abut against the motion limiting arms 30 on their inner sides. Figure 15 It is evident that the volume constructed in the second position between the two motion limiting arms 30 is greater than the volume of the elastically deformable compensation mechanism 27 arranged in the second position. In the installed state, the first free longitudinal end 8 of the drive shaft 6 presses against the contact element 20, thereby compressing the elastically deformable compensation mechanism 27 and thus placing the mechanical compensation element 16 under a predetermined preload. The drive shaft 6 is thus supported without clearance.

[0057] Figures 16 to 19Another embodiment is shown, wherein, in addition to the mechanical compensation element 16 on the first free longitudinal end 8 of the drive shaft 6, a mechanical additional compensation element 35 is provided, which is mounted on the drive housing 2 and arranged on the second free longitudinal end 11 of the drive shaft 6. The mechanical additional compensation element 35 allows the drive shaft 6 to move relative to the drive housing 2 against the compensating force applied by the mechanical additional compensation element 35 in the direction from the first motor side 9 to the second motor side 12 and to press the second free longitudinal end 11 of the drive shaft 6 toward the first motor side 9. The mechanical compensation element 16 arranged on the first free longitudinal end 8 corresponds to the embodiment according to the third embodiment, wherein it is also conceivable that embodiments of the mechanical compensation element 16 also correspond to the first or second embodiment. The mechanical additional compensation element 35 generally corresponds to the design of the third embodiment, as referenced. Figures 16 to 19 Correspondingly, the drive housing 2 has an additional stop wall portion or additional stop wall portion 36 and an additional limiting element or additional limiting element 37, wherein the additional stop wall portion 36 and the additional limiting element 37 are designed as wall sections of the additional receiving portion perimeter 38 of the drive housing 2, within which a mechanical additional compensation element 35 is arranged. The mechanical additional compensation element 35 is particularly arranged between the additional stop wall portion 36 and the additional limiting element 37, as shown in the reference. Figures 17 to 19 The additional stop wall portion 36 has a recess 39 in which the second free longitudinal end portion 11 of the drive shaft 6 is disposed, and the second free longitudinal end portion works in conjunction with the mechanical additional compensation element 35.

[0058] According to the third embodiment, the mechanical additional compensation element 35 has an additional contact element or additional contact element 40, which is made of a wear-resistant material. The additional contact element or additional contact element 40 abuts against the second free longitudinal end 11 of the drive shaft 6 and is movable between a first position and a second position. In the first position, the additional contact element or additional contact element 40 abuts against an additional stop wall portion or additional stop wall portion 36. In the second position, the additional contact element or additional contact element 40 is spaced apart from the additional stop wall portion 36. As in the third embodiment, in... Figures 16 to 19 The illustrated embodiment also specifies, for the mechanical additional compensation element 35, that a compensating mechanism 41 capable of elastic deformation is arranged between the additional contact element 40 and the additional limiting element 37. The additional contact element 40 (as in the third embodiment) has a bottom side 42 and a motion limiting arm 43 extending from the bottom side. The bottom side 42 abuts against the additional stop wall portion 36 in a first position (see...). Figure 17 and Figure 19 Conversely, the two motion limiting arms 43 extending from the bottom side 42 toward the additional limiting element 37 can abut against the additional limiting element 37 in the second position. (See reference for example.) Figure 17 or Figure 19The elastically deformable compensation mechanism 41 is arranged between the two motion limiting arms 43 and has a retaining connecting piece 44 and a deformation section 46 that are form-locked and fastened in the retaining recess 45 constructed in the actuator housing 2. Figures 16 to 19 The working principle of the illustrated embodiment is substantially the same for mechanical additional compensation element 35 as for mechanical compensation element 16, and reference is made to the corresponding implementation.

[0059] exist Figures 16 to 19 In the illustrated embodiment, alternatively, the additional contact element or supplementary contact element 40 is designed as a spring sheet, as described with reference to the first embodiment. It is also conceivable that the additional contact element or supplementary contact element 40 is a baffle, wherein an additional elastically deformable compensation mechanism 41 is configured as a sheet and abuts against an additional limiting element 37 designed as a wall. It is also conceivable that the mechanical compensation element 16 and the mechanical supplementary compensation element 37 have different embodiments.

[0060] In summary, the present invention relates to the aforementioned motor vehicle drive unit 1, wherein the drive shaft 6 of the electrically driven motor 4 deflects within the drive housing 2 within a specified tolerance, and the drive shaft 6 is held without clearance at least with the aid of a mechanical compensating element 16. Specifically, the mechanical compensating element 16 allows the drive shaft 6 to move relative to the drive housing 2 against a compensating force applied by the mechanical compensating element 16 in the direction from the second motor side 12 to the first motor side 9, and to press the first free longitudinal end 8 of the drive shaft 6 toward the second motor side 12. Here, the deflection movement of the drive shaft 6 is feasible with respect to the distance between the stop wall portion 17 and the limiting element 18. Additionally, a mechanical supplementary compensating element 35 is provided for backlash-free support of the drive shaft 6, which is arranged on the second free longitudinal end 11 of the drive shaft 6, wherein the mechanical supplementary compensating element 35 allows the drive shaft 6 to move relative to the drive housing 2 against a compensating force applied by the mechanical supplementary compensating element 35 in the direction from the first motor side 9 to the second motor side 12, and to press the second free longitudinal end 11 of the drive shaft 6 toward the first motor side 9. Here, the mechanical compensation element 16 and the mechanical additional compensation element 35 may be the same or different and correspond to the construction of the first, second or third embodiment described.

[0061] The described invention is, of course, not limited to the described and illustrated embodiments. Numerous modifications readily understood by those skilled in the art for the intended application can be made to the embodiments shown in the accompanying drawings without departing from the scope of the invention. All contents contained in the specification and / or shown in the drawings, including those different from the specific embodiments but readily understood by those skilled in the art, are part of this invention.

Claims

1. A motor vehicle drive unit (1), the motor vehicle drive unit having: Driver housing (2); An electric drive motor (4) having a motor housing (5) and the electric drive motor being arranged within the driver housing (2); A drive shaft (6) extending through the motor housing (5) includes a first shaft section (7) and a second shaft section (10), the first shaft section having a first free longitudinal end (8) and extending from the motor housing (5) on a first motor side (9), and the second shaft section extending from the motor housing (5) on a second motor side (12) opposite to the first motor side (9) with a second free longitudinal end (11); as well as A drive worm (14) is constructed on the first shaft section (7) of the drive shaft (6). The device is characterized by having a mechanical compensation element (16) mounted on the driver housing (2) and arranged on the first free longitudinal end (8) of the drive shaft (6), wherein the mechanical compensation element (16) allows the drive shaft (6) to move relative to the driver housing (2) against a compensating force applied by the mechanical compensation element (16) in a direction from the second motor side (12) to the first motor side (9), and to press the first free longitudinal end (8) of the drive shaft (6) toward the second motor side (12). The drive housing (2) has a stop wall portion (17) and a limiting element (18). The stop wall portion has a recess (19), and the first free longitudinal end (8) of the drive shaft (6) is arranged in the recess. The mechanical compensation element (16) is arranged between the stop wall portion (17) and the limiting element (18). The mechanical compensation element (16) has a contact element (20) made of a wear-resistant material, which abuts against the first free longitudinal end (8) of the drive shaft (6) and moves between a first position and a second position. In the first position, the contact element (20) abuts against the stop wall portion (17), and in the second position, the contact element (20) is spaced apart from the stop wall portion (17). A compensating mechanism (27) capable of elastic deformation is arranged between the contact element (20) and the limiting element (18). The contact element (20) has a bottom side (29) that abuts against the stop wall (17) in the first position and two motion limiting arms (30) that extend from the bottom side (29) in the direction of the limiting element (18) and the two motion limiting arms abut against the limiting element (18) in the second position.

2. The motor vehicle drive device (1) according to claim 1, characterized in that, The elastically deformable compensation mechanism (27) is arranged between the two motion limiting arms (30) and has a retaining connecting piece (31) and a deformation section (32), the retaining connecting piece being shape-locked into a retaining recess (33) constructed within the actuator housing (2).

3. The motor vehicle drive device (1) according to claim 2, characterized in that, In the second position, the volume constructed between the two motion limiting arms (30) is greater than the volume of the elastically deformable compensation mechanism (27) arranged in the second position.

4. The motor vehicle drive device (1) according to claim 2, characterized in that, The elastically deformable compensation mechanism (27) is made of a first plastic and the actuator housing (2) is made of a second plastic by means of two-component injection molding.

5. The motor vehicle drive device (1) according to claim 1, characterized in that... The drive shaft (6) has a mechanical additional compensation element (35) mounted on the drive housing (2) and arranged on the second free longitudinal end (11) of the drive shaft (6), wherein the mechanical additional compensation element (35) allows the drive shaft (6) to move relative to the drive housing (2) against the compensating force applied by the mechanical additional compensation element (35) in a direction from the first motor side (9) to the second motor side (12) and to press the second free longitudinal end (11) of the drive shaft (6) toward the first motor side (9).

6. The motor vehicle drive device (1) according to claim 5, characterized in that, The drive housing (2) has an additional stop wall (36) and an additional limiting element (37), the additional stop wall having a recess (39) in which the second free longitudinal end (11) of the drive shaft (6) is disposed, wherein the mechanical additional compensation element (35) is disposed between the additional stop wall (36) and the additional limiting element (37).

7. The motor vehicle drive device (1) according to claim 6, characterized in that, The mechanical additional compensation element (35) has an additional contact element (40) made of wear-resistant material, which abuts against the second free longitudinal end (11) of the drive shaft (6) and is movable between a first position and a second position. In the first position, the additional contact element (40) abuts against the additional stop wall (36), and in the second position, the additional contact element (40) is spaced apart from the additional stop wall (36).

8. The motor vehicle drive device (1) according to claim 7, characterized in that, The additional contact element (40) is designed as a spring sheet that is force-locked to the driver housing (2).

9. The motor vehicle drive device (1) according to claim 7, characterized in that, An elastically deformable compensation mechanism (41) is arranged between the additional contact element (40) and the additional limiting element (37).

10. The motor vehicle drive device (1) according to claim 9, characterized in that, The additional contact element (40) is a baffle, and the additional elastically deformable compensation mechanism is configured as a sheet and abuts against an additional limiting element designed as a wall.

11. The motor vehicle drive device (1) according to claim 9, characterized in that, The additional contact element (40) has a bottom side (42) that abuts against the additional stop wall (36) in the first position and two motion limiting arms (43) that extend from the bottom side (42) in the direction of the additional limiting element (37) and abut against the additional limiting element (37) in the second position.

Images