Motor Transmission Arrangement in Particular for an Adjustment Device in Vehicles for Adjusting Two Vehicle parts Which Can Be Adjusted Relative to One Another

Abstract

A motor-transmission arrangement in particular for an adjustment device in vehicles for adjusting two vehicle parts which can be adjusted relative to one another can include a planetary transmission with at least one pinion cage, at least one planet wheel which is rotatably supported in the pinion cage and with a planet wheel cogging, and with at least one hollow gear with an inside cogging which is engaged with the planet wheel cogging, and an electromotor with a motor shaft which can rotate about a motor shaft axle and which comprises a motor shaft cogging arranged directly on the motor shaft, which cogging is engaged with the planet wheel cogging. The disclosure also relates to an adjustment device with such a motor-transmission arrangement and to the usage of such a motor-transmission arrangement in adjustment devices.

Claims

1. A motor-transmission arrangement comprising: a planetary transmission comprising: a pinion cage; a planet wheel that is rotatably supported in the pinion cage and that has a planet wheel cogging; a hollow gear having an inside cogging which engages with the planet wheel cogging; and an electromotor with a motor shaft having a motor shaft axle, wherein the motor shaft rotates about the motor shaft axle and which comprises a motor shaft cogging arranged directly on the motor shaft, and wherein the motor shaft cogging engages with the planet wheel cogging.

2. The motor-transmission arrangement according to claim 1, wherein the planetary transmission comprises as a spiral gear planetary transmission, wherein the planet wheel is supported in the pinion cage in such a manner that the planet wheel rotates about a planet wheel axle and the planet wheel axle runs in a warped manner to a pinion cage axle.

3. The motor-transmission arrangement according to claim 2, wherein the planetary transmission and the spiral gear planetary transmission are constructed in one stage.

4. The motor-transmission arrangement according to claim 1, wherein the electromotor comprises a housing and the motor shaft is supported by a first housing support section and a second housing support section axially and radially in the housing.

5. The motor-transmission arrangement according to claim 4, wherein the first housing support section, the second housing support section, or both the first housing support section and the second housing support section, comprise a sliding bearing for radially supporting the motor shaft.

6. The motor-transmission arrangement according claim 5, further comprising a support disk is connected to the motor shaft and the motor shaft is axially supported in the first housing support section, the second housing support section, or both the first housing support section and the second housing support section.

7. The motor-transmission arrangement according to claim 6, wherein the support disk rests on the sliding bearing.

8. The motor-transmission arrangement according to claim 4, wherein the first housing support section, the second housing support section, or both the first housing support section and the second housing support section, support a roller bearing for the radial and axial supporting of the motor shaft.

9. The motor-transmission arrangement according to claim 8, wherein the motor shaft comprises a first motor shaft section with a first motor shaft diameter and second motor shaft section with a second motor shaft diameter, wherein the second motor shaft diameter is less than the first motor shaft diameter, and the roller bearing is arranged in the first motor shaft section.

10. The motor-transmission arrangement according to claim 1, wherein, that the hollow gear is connected in a non-rotating manner to the electromotor.

11. The motor-transmission arrangement according to claim 10, wherein an adapter is arranged between the hollow gear and the electromotor, wherein the adapter is connected in a non-rotating manner to the electromotor and the hollow gear.

12. The motor-transmission arrangement according to claim 1, wherein the motor operates a vehicle adjustment device for adjusting two vehicle parts which can be adjusted relative to one another.

13. The motor-transmission arrangement according to claim 12, wherein the adjustment device is a rear gate adjustment.

14. The motor-transmission arrangement according to claim 13, wherein the planetary transmission is designed as a spiral gear planetary transmission.

15. An electromotor, comprising: a motor shaft having a motor shaft axle and which comprises a motor shaft cogging arranged directly on the motor shaft, wherein the motor shaft is configured to engage with a planetary transmission, wherein the planetary transmission comprises: a pinion cage; a planet wheel that is rotatably supported in the pinion cage and that has a planet wheel cogging; a hollow gear having an inside cogging which engages with the planet wheel cogging; and wherein the motor shaft cogging is configured to engage with the planet wheel cogging.

16. The electromotor according to claim 15, wherein the electromotor comprises a housing and that the motor shaft is axially and radially supported in the housing by a first housing support section and a second housing support section.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0029] Exemplary embodiments of the present application are explained in detail in the following with reference made to the attached drawings. In the drawings:

[0030] FIG. 1a shows a first embodiment of a motor-transmission arrangement according to the present application using a sectional view in a state which is not completely mounted,

[0031] FIG. 1b shows the motor-transmission arrangement shown in FIG. 1a using a perspective view in a state which is not completely mounted,

[0032] FIG. 1c shows the motor-transmission arrangement shown in FIG. 1a using a sectional view in a state which is completely mounted,

[0033] FIG. 2 shows a second embodiment of the motor-transmission arrangement,

[0034] FIG. 3 shows a third embodiment of the motor-transmission arrangement,

[0035] FIG. 4 shows a fourth embodiment of the motor-transmission arrangement, using a sectional view in the finished, mounted state,

[0036] FIG. 5 shows a fifth embodiment of the motor-transmission arrangement, wherein the transmission is omitted,

[0037] FIG. 6 shows a sixth embodiment of the motor-transmission arrangement, wherein the transmission is omitted, and

[0038] FIG. 7 shows a basic view of an adjustment device in a vehicle.

DETAILED DESCRIPTION

[0039] FIGS. 1a to 1c show a first embodiment of a motor-transmission arrangement 10.sub.1 according to the present disclosure using different views in different mounting states. The motor-transmission arrangement 10.sub.1 comprises a planetary transmission 12 and an electromotor 14. The electromotor 14 is provided with a motor shaft 15 which can rotate about a motor shaft axle A.sub.MW.

[0040] The planetary transmission 12 comprises a pinion cage 16 which defines a pinion cage axle A.sub.PT and on which a total of three planet wheels 18 are supported in a rotatable manner about a planet wheel axis A.sub.P. The planet wheels 18 comprise a planet wheel cogging 20. Furthermore, the planetary transmission 12 comprises a hollow gear 22 with an inside cogging 24 which engages with the planet wheel cogging 20.

[0041] In the embodiment shown, the planetary transmission 12 is designed as a spiral gear planetary transmission 26. In this embodiment the planet wheel axes A.sub.P run in a warped manner to the pinion cage axle A.sub.PT. Moreover, the hollow gear 22 is designed here as an inside spiral gear 28. The motor shaft 15 comprises a motor shaft cogging 30 arranged directly on the motor shaft 15 which cogging is designed as a spiral cogging of a spiral gear sun 32. The motor shaft cogging 30 forms an end of the motor shaft 15. The planet wheel cogging 20 and the inside cogging 24 of the inside spiral gear 28 are adapted to the spiral cogging of the spiral gear sun 32 in order to make available the most optimal engagement possible inside the spiral gear planetary transmission 26.

[0042] The electromotor 14 comprises a housing 34 and a first support section 36 and a second support section 38 for the axial and radial supporting of the motor shaft 15 in the electromotor 14. In the first embodiment of the motor-transmission arrangement 10.sub.1 the first support section 36 as well as the second support section 38 each comprise a sliding bearing 40 and the support disk 42 pressed onto the motor shaft 15. The two sliding bearings 40 for the are each fastened in a cylindrical receptacle 44 of the housing 34 of the electromotor 14. The two support disks 42 on arranged outside of the housing 34 and lie axially on one of the sliding bearings 40, wherein a certain axial play is provided in order to avoid a static coincidence. The housing 34 of the electromotor 14 comprises a cover 46 which forms the cylindrical receptacle 44 for the sliding bearing 40.

[0043] The motor shaft 15 comprises a first shaft section 47 in which the motor shaft 15 comprises a first motor shaft diameter D.sub.MW1. The motor shaft cogging 30 comprises an outer cogging diameter D.sub.V. Depending on the cogging selected, the outer cogging diameter D.sub.V can be the crown line diameter. In the first embodiment shown, the outer cogging diameter D.sub.V is equal to the first motor shaft diameter D.sub.MW1, wherein the outer cogging diameter D.sub.V can also be selected to be smaller than the first motor shaft diameter D.sub.MW1. Consequently, the sliding bearings 40 and the support disks 42 can be pushed over the motor shaft cogging 30 or the motor shaft cogging 30 can be run through the sliding bearing 40. Depending on the requirement, the cogging diameter D.sub.V can also be selected to be greater than the motor shaft diameter D.sub.MW1. In particular, the variation of the cogging diameter D.sub.V is a possibility for the adaptation of the translation ratios.

[0044] Furthermore, the motor-transmission arrangement 10.sub.1 comprises an adapter 48 which is fastened in the mounting state shown in FIGS. 1a and 1b on the inner spiral gear 28, for example, by calking, adhering or welding. The adapter 48 can be adapted to the various geometric properties of the housing 34 of the electromotor 14 so that the planetary transmission 12 can be connected unchanged or nearly unchanged to different electromotors to a motor-transmission arrangement 10.sub.1.

[0045] In order to connect the planetary transmission to the electromotor 14, they are aligned in such a manner relative to one another that the motor shaft axle A.sub.MW and the pinion cage axle A.sub.PT are in alignment with one another. The motor shaft 15 is subsequently brought with the motor shaft cogging 30 into the planetary transmission 12 so that the motor shaft cogging 30 engages with the planet wheel cogging 20. The adapter 48 is dimensioned in such a manner that when the motor shaft cogging 30 is engaged with the planet wheel cogging 20, the adapter 48 rests on the housing 34 of the electromotor 14. The adapter 48 is now connected to the housing 34, for example, by adhering, screwing or welding. The motor-transmission arrangement 10.sub.1 is now in the finished, mounted state shown in FIG. 1c.

[0046] FIGS. 2 to 4 show a second, third and fourth embodiment of the motor-transmission arrangement 10.sub.2 to 10.sub.4 using a sectional view in the finished, mounted state. The embodiments shown there differ substantially in the formation of the first support section 36 and of the second support section 38.

[0047] In the second embodiment of the motor-transmission arrangement 10.sub.2 the support disk 42 are arranged inside the housing 34 of the electromotor 14. As a result thereof, the planetary transmission 12 can be arranged closer to the electromotor 14 by the width of the support disk 42 so that the axial construction space of the motor-transmission arrangement 10.sub.1 can be reduced in a corresponding manner. The adapter 48 is axially designed to be correspondingly shorter.

[0048] In the third embodiment of the motor-transmission arrangement 103 both support disks 42 are arranged in the second support section 38, wherein one of the support disks 42 is arranged inside and the other one of the support disks 42 is arranged outside of the housing 34.

[0049] In the fourth embodiment of the motor-transmission arrangement 10.sub.4 both support disks 42 are arranged in the first support section 36, wherein one of the support disks 42 is arranged inside and the other one of the support disks 42 is arranged outside of the housing 34. As in the second embodiment, the planetary transmission 12 can be arranged closer to the electromotor 14 by the width of the support disk 42.

[0050] FIG. 5 shows a fifth exemplary embodiment of the motor-transmission arrangement 10.sub.5, wherein, however, the planetary transmission 12 is not shown. The planetary transmission 12 can be constructed and connected to the housing 34 of the electromotor 14 as in the previously described exemplary embodiments. In this exemplary embodiment a sliding bearing 40 is also arranged in the first support section 36, as in the previously described exemplary embodiment, which bearing rests on a shoulder 50 of the housing 34 and is axially secured. A roller bearing 52, in the example shown a ball bearing 54, is arranged in the second support section 38 with which bearing the motor shaft 15 is supported not only radially but also axially. An inner ring 56 of the ball bearing 54 is pressed onto the motor shaft 15 and an outer ring 58 is fixed in the housing 34 of the electromotor 14. The arrangement of the sliding bearing 40 and of the roller bearing 52 can also be inverted so that the roller bearing 52 is arranged in the first support section 36 and the sliding bearing 40 is arranged in the second support section 38.

[0051] FIG. 6 shows a sixth exemplary embodiment of the motor-transmission arrangement 10.sub.6 in which the planetary transmission 12 is also not shown. The motor-transmission arrangement 10.sub.6 is designed to be largely identical to the motor-transmission arrangement 10.sub.5 according to the fifth exemplary embodiment. However, the first shaft section 47 in which the motor shaft 15 has the motor shaft diameter D.sub.MW1 does not extend over the entire motor shaft 15 but closes approximately flush with the end of the ball bearing 54 facing the interior of the electromotor 14. The first shaft section 47 directly follows the motor shaft cogging 30 and has the first motor shaft diameter D.sub.MW1 which is equal to the cogging diameter D.sub.V, as is also shown in FIG. 1a. Behind the first wave section 47, viewed from the motor shaft cogging 30, the motor shaft 15 comprises a second shaft section 59 with a second motor shaft diameter D.sub.MW2 which is smaller than the first motor shaft diameter D.sub.MW1. The second shaft section 59 with the second motor shaft diameter D.sub.MW2 extends up to the end of the motor shaft 15, which end is opposite the motor shaft cogging 30, so that the sliding bearing 40 makes contact in the second wave section 59 in contrast to the fifth exemplary embodiment of the motor-transmission arrangement 10.sub.5, that is, where the motor shaft 15 has the second motor shaft diameter D.sub.MW2. Just as in the fifth exemplary embodiment of the motor-transmission arrangement 10.sub.5, the ball bearing 54 is arranged in the first shaft section 47 in which the motor shaft 15 has the first motor shaft diameter D.sub.MW1.

[0052] In all embodiments of the motor-transmission arrangement 10 the two support sections 36, 38 are arranged in the housing 34 of the electromotor so that no support has to be arranged in the pinion cage 16, which simplifies the mounting.

[0053] For reasons of presentation, the cogging diameter DV is shown only in FIG. 1a. However, the explanations about the cogging diameter D.sub.V also apply to the second to the sixth exemplary embodiments of the motor-transmission arrangement 10.sub.2-10.sub.5.

[0054] FIG. 7 partially shows a vehicle 60 using a basic side view, which comprises an adjustment device 62 for adjusting two vehicle parts that can be adjusted relative to one another. In this case the adjustment device 62 is constructed as a rear gate adjustment 64 with which a rear gate 66 of the vehicle 60 can be adjusted relative to the rest of the vehicle 60 and can therefore be opened and closed. The rear gate adjustment 64 comprises a motor-transmission arrangement 10 according to one of the previously described embodiments which is not explicitly shown in FIG. 5.

LIST OF REFERENCE NUMERALS

[0055] 10, 10.sub.1 to 10.sub.6 motor-transmission arrangement [0056] 12 planetary transmission [0057] 14 electromotor [0058] 15 motor shaft [0059] 16 pinion cage [0060] 18 planet wheel [0061] 20 planet wheel cogging [0062] 22 hollow gear [0063] 24 inside wheel cogging [0064] 26 spiral gear planetary transmission [0065] 28 inside spiral gear 28 [0066] 30 motor shaft cogging [0067] 32 spiral gear sun [0068] 34 housing [0069] 36 first support section [0070] 38 second support section [0071] 40 sliding bearing [0072] 42 support disk [0073] 44 cylindrical receptacle [0074] 46 cover [0075] 47 first shaft section [0076] 48 adapter [0077] 50 shoulder [0078] 52 roller bearing [0079] 54 ball bearing [0080] 56 inner ring [0081] 58 outer ring [0082] 60 vehicle [0083] 62 adjustment device [0084] 64 rear gate adjustment [0085] 66 rear gate [0086] A.sub.MW motor shaft axle [0087] A.sub.P planet wheel axle [0088] A.sub.PT pinion cage axle [0089] D.sub.MW1 first motor shaft diameter [0090] D.sub.MW2 second motor shaft diameter [0091] D.sub.V cogging diameter