DRIVE DEVICE FOR ACTIVATING A ROTARY SLIDE

Abstract

The invention relates to a drive device for activating a rotary slide for a fluid system of an at least in part electrically operated motor vehicle. The drive device comprises an electric motor having a motor output shaft, a rotary slide output shaft configured for activating a rotary slide, wherein the rotary slide output shaft is aligned so as to be orthogonal to the motor output shaft, and a magnet is disposed on an end region of the rotary slide output shaft, and a sensor unit which is configured for detecting a rotary position of the magnet and thus of the rotary slide output shaft.

Claims

1. A drive device for activating a rotary slide for a fluid system of an at least in part electrically operated motor vehicle, said drive device having the following: an electric motor having a motor output shaft; a rotary slide output shaft configured for activating a rotary slide; wherein the rotary slide output shaft is aligned so as to be orthogonal to the motor output shaft, and a magnet is disposed on an end region of the rotary slide output shaft; and a sensor unit which is configured for detecting a rotary position of the magnet and thus of the rotary slide output shaft.

2. The drive device according to claim 1, wherein the sensor unit is disposed so as to be axially spaced apart from the face-proximal end of the rotary slide output shaft.

3. The drive device according to claim 1, wherein the sensor unit is disposed on a control unit.

4. The drive device according to claim 1, wherein the rotary slide output shaft is held by means of a housing-proximal bearing.

5. The drive device according to claim 3, wherein the control unit is disposed between the face-proximal end of the rotary slide output shaft and the housing-proximal bearing.

6. The drive device according to claim 1, wherein the drive device has a gearbox for transmitting a torque of the motor output shaft to the rotary slide output shaft, wherein a first gear wheel axle and a second gear wheel axle of the gearbox are disposed so as to be mutually parallel, and the rotary slide output shaft comprises the first gear wheel axle.

7. The drive device according to claim 4, wherein the housing-proximal bearing for holding the rotary slide output shaft is configured so as to be tongue-shaped, wherein the tongue-shaped bearing is disposed substantially on a side of the first gear wheel axle that faces away from the second gear wheel axle.

8. The drive device according to claim 7, wherein the housing-proximal bearing for holding the rotary slide output shaft extends through a contour of the control unit.

9. The drive device according to claim 1, wherein the electric motor is configured as a brushless stepper motor having axially disposed coils.

10. The drive device according to claim 1, wherein the sensor unit has a 3D Hall sensor.

11. The drive device according to claim 1, wherein the control unit is disposed so as to be orthogonal to the first gear wheel axle and to the second gear wheel axle.

12. The drive device according to claim 1, wherein the drive device and the control unit are disposed in a fluidically sealed housing.

13. The drive device according to claim 12, wherein the housing has a bulkhead for fluidically sealing the control unit and the electric motor in relation to a housing portion that is able to be passed through by a fluid flow.

14. The drive device according to claim 1, wherein the drive device has an interface for connecting to an external control apparatus.

15. The drive device according to claim 1, wherein the gearbox is configured for wet running.

16. The drive device according to claim 2, wherein the sensor unit is disposed on a control unit.

17. The drive device according to claim 2, wherein the rotary slide output shaft is held by means of a housing-proximal bearing.

18. The drive device according to claim 3, wherein the rotary slide output shaft is held by means of a housing-proximal bearing.

19. The drive device according to claim 4, wherein the control unit is disposed between the face-proximal end of the rotary slide output shaft and the housing-proximal bearing.

20. The drive device according to claim 2, wherein the drive device has a gearbox for transmitting a torque of the motor output shaft to the rotary slide output shaft, wherein a first gear wheel axle and a second gear wheel axle of the gearbox are disposed so as to be mutually parallel, and the rotary slide output shaft comprises the first gear wheel axle.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In the drawings used for explaining the exemplary embodiment:

[0049] FIG. 1 shows a perspective partial view of a drive device;

[0050] FIG. 2 shows a perspective partial view of the drive device from FIG. 1, having a control unit and a plug connector;

[0051] FIG. 3 shows a perspective lateral view of the detail III from FIG. 1;

[0052] FIG. 4 shows the partial view of FIG. 2, having an indicated rotary slide housing;

[0053] FIG. 5 shows a perspective lateral view of the rotary slide housing;

[0054] FIG. 6 shows an exploded illustration of an embodiment according to the invention;

[0055] FIG. 7 shows a sectional view of an embodiment according to the invention; and

[0056] FIG. 8 shows a partial view of the drive device according to the invention.

[0057] In principle, identical parts are provided with the same reference signs in the figures.

WAYS OF IMPLEMENTING THE INVENTION

[0058] FIG. 1 shows a perspective partial view of a drive device 100 according to the invention for activating a rotary slide for a fluid system of an at least in part electrically operated motor vehicle. The drive device 100 has an electric motor 110 from which a motor output shaft 112 extends. The electric motor 110 has a cylindrical basic shape with a diameter 114. Moreover, the drive device 100 has a gearbox 130 which connects the motor output shaft 112 to the rotary slide output shaft 140. The gearbox 130 comprises a gearbox input shaft 132 which by means of a first bevel gear 134 is connected to the motor output shaft 112. The gearbox 130 furthermore comprises a spur gear set 135 which is connected to the gearbox input shaft 132 and a gearbox output shaft 136 which is disposed in parallel. The spur gear set 135 comprises a plurality of gear wheel speeds so as to transmit a comparatively high rotating speed of the electric motor 110 at a low torque to a lower rotating speed of the rotary slide output shaft 140 at an increased torque. The gearbox 130 is connected to the rotary slide output shaft 140 by way of the gearbox output shaft 136 and a second bevel gear 138 which is likewise associated with the gearbox 130.

[0059] The electric motor 110 here is configured as an inductor stepper motor. In order for the installation height of the drive device 100 to be kept ideally small, the radial extent of the largest gear wheel of the spur gear set 135 is smaller than or equal to the diameter 114 of the electric motor 110. The gear input shaft 132 of the gearbox 130 is disposed so as to be orthogonal to the motor output shaft 112. The rotary slide output shaft 140 is disposed so as to be orthogonal to the gearbox input shaft 132 as well as to the gearbox output shaft 136. A magnet 142, the rotary position thereof being able to be detected by a sensor unit 152 (not shown), is situated at one end of the rotary slide output shaft 140.

[0060] FIG. 2 shows an expanded partial view of the drive device 100 according to the invention. Components of the drive device 100 known from FIG. 1 are the electric motor 110 and the gearbox 130 having the spur gear set 135. Additionally, the drive device 100 has a control unit 150 having a sensor unit 152 (not illustrated). The sensor unit 152 is preferably disposed directly above the magnet 142. The control unit 150 herein is connected to a plug connector 164 by means of an interface 162 (not shown). Moreover, the control unit 150 is disposed so as to be parallel to a plane which is predefined by the motor output shaft 112 (see FIG. 1) and the gearbox input shaft 132 (see FIG. 1). The control unit 150 comprises a clearance 154 so as to dispose the control unit 150 at an ideally flat height on the drive device 100.

[0061] FIG. 3 shows a partial view of the drive device 100 according to the invention in which the rotary slide output shaft 140 can be seen. The rotary slide output shaft 140 has the magnet 142, the rotary position thereof being able to be detected by the sensor unit 152 mentioned in the context of FIG. 2, so as to detect an angular position of the rotary slide output shaft 140. It is thus overall possible for the current rotary position of the rotary slide (not shown) to be detected and controlled.

[0062] FIG. 4 shows the partial view from FIG. 2, additionally having an indicated housing 160 which encloses the drive device 100. All components from FIG. 2 are thus also illustrated here. The drive device 100 conjointly with the control unit 150 are disposed so as to be fluidically sealed in the housing 160. The housing 160 can moreover have a bulkhead so as to fluidically separate the control unit 150 and the electric motor 110 from a housing portion that is able to be passed through by a fluid flow, for example when the gearbox 130 is configured for wet running.

[0063] FIG. 5 shows the housing 160 having the externally disposed plug connector 164. Manifold individual aspects of the drive device 100 have in particular been described in the description. The individual aspects herein may be claimed individually and independently of other aspects.

[0064] FIG. 6 shows an exploded illustration of an embodiment according to the invention of a drive device 100.

[0065] The drive device 100 has an electric motor 110 in the form of a brushless stepper motor. The electric motor 110 lies flat in a fluidically sealed housing 160 and is disposed in a space-saving manner beside a gearbox 130 for transmitting a torque of a motor output shaft 112 to a rotary slide output shaft 140. The motor output shaft 112 is connected to the gearbox 130 by means of a gearbox input shaft 132 in the form of a worm gear.

[0066] The rotary slide output shaft 140 is aligned so as to be orthogonal to the motor output shaft 112, on account of which a particularly flat construction mode of the drive device 110 is possible.

[0067] A magnet 142 is disposed so as to be centric on an end region 141 of the rotary slide output shaft 140 so as to detect a rotary position of the magnet 142 and thus of the rotary slide output shaft 140 with the aid of a sensor unit 152. The sensor unit 152 is axially spaced apart from the face-proximal end of the rotary slide output shaft 140 so as to enable precise measuring. To this end, the sensor unit 152 on the magnet 142 is disposed directly above the end region 141 of the rotary slide output shaft 140.

[0068] The gearbox 130 in addition to the gearbox input shaft 132 possesses three further gear wheels 131, 133, 137, the gear wheel axles 156, 157, 158 thereof being aligned so as to be mutually parallel. The motor output shaft 112 is connected to the third gear wheel 131 by means of the gearbox input shaft 132. The torque of the electric motor 110 herein is transmitted to the third gear wheel 131 by way of the worm gear, the third gear wheel axle 158 of said third gear wheel 131 being configured so as to be orthogonal to the motor output shaft 112.

[0069] The third gear wheel 131 is connected to the second gear wheel 133, wherein the second gear wheel axle 157 is assigned to the second gear wheel 133. The second gear wheel 133 is connected to the first gear wheel 137, wherein the first gear wheel axle 156 is assigned to the first gear wheel 137. The rotary slide output shaft 140 is connected to the first gear wheel 137 and at an upper end supports the magnet 142 so as to detect the rotary position of the magnet 142 and thus of the rotary slide output shaft 140 with the aid of the sensor unit 152. A rotary slide (not shown) can be disposed on the lower end of the first gear wheel 137 so as to switch said rotary slide back and forth between specific angular positions. The rotary slide output shaft 140 herein is guided through a housing opening 165. Additionally, the first gear wheel 137 is guided in relation to the housing opening 165 by means of a radial sealing element 163.

[0070] A plug connector 164 which has an interface 162 (not shown) for connecting to an external control apparatus is situated laterally on the housing 160.

[0071] A control unit 150 the form of a circuit board which supports the sensor unit 152 exactly above the magnet 152 is situated above the gearbox 130. A clearance 154 of the control unit 150 offers a construction mode which is spatially optimized and compact, because the control unit 150 and the electric motor 110 can be disposed closer beside one another and the spacing between the control unit 150 and the face-proximal end of the gear wheels 137, 133, 131 can be additionally reduced.

[0072] A housing cover 166 which has a housing-proximal bearing 161 for holding the rotary slide output shaft 140 is shown above the control unit 150. The housing-proximal bearing 161 for holding the rotary slide output shaft 140 is configured so as to be tongue-shaped or as a wall of a partial cylinder. An asymmetrical bearing load during the operation of two mutually meshing gear wheels is absorbed on account of the tongue-shaped configuration of the housing-proximal bearing 161. The asymmetrical bearing load is created in that two mutually meshing gear wheels, here the first gear wheel 137 and the second gear wheel 133, when in operation each have the characteristic of generating a force that points radially away from the respective other force. The tongue-shaped configuration of the bearing is used only on that side that arises by virtue of the occurring load. The rotary slide output shaft 140 is thus only unilaterally mounted, this facilitating the assembly of the drive device 100.

[0073] The control unit 150 is disposed between the face-proximal end of the rotary slide output shaft 140 and the housing cover 166. In order for the housing-proximal bearing 161 to be able to hold the rotary slide output shaft 140, the latter is guided through a contour 151 of the control unit 150.

[0074] FIG. 7 shows a sectional view of an embodiment according to the invention of the drive device 100. The drive device 100 including the control unit 150 is situated within the fluidically sealed housing 160, both being closed by the housing cover 166. The sectional view shows the first gear wheel 137 having the first gear wheel axle 156 which is assigned to the first gear wheel 137. The housing-proximal bearing 161 which is configured for holding the rotary slide output shaft 140 and thus the first gear wheel 137 extends from the housing cover 166. The housing-proximal bearing 161 herein extends through the contour 151 of the control unit 150. The sensor unit 152 which can detect the rotary position of the magnet 142 is disposed on the control unit 150. The magnet 142 is disposed on an end region of the rotary slide output shaft 141, on account of which the position of a rotary slide (not shown) can be deduced from the rotary position of the magnet 142 by way of the rotary position of the rotary slide output shaft 140. A rotary slide can be fastened to a rotary slide interface 139 disposed on the rotary slide output shaft 140. The rotary slide output shaft 140 is sealed in relation to the housing 160 by means of the sealing element 163.

[0075] The second gear wheel 133 to which the second gear wheel axle 157 is assigned meshes with the first gear wheel 137. The first gear wheel axle 156 and the second gear wheel axle 157 of the gearbox 130 are disposed so as to be mutually parallel. The rotary slide output shaft 140 comprises the first gear wheel axle 156. The control unit 150 is aligned so as to be orthogonal to the first gear wheel axle 156 as well as to the second gear wheel axle 157.

[0076] FIG. 8 shows a partial view of the drive device 100 according to the invention in a plan view. The laterally disposed plug connector 164 is situated on the housing 160. The control unit 150 having the clearance 154 in which the electric motor 110 is incorporated is situated within the housing 160. The tongue-shaped housing-proximal bearing 161 extends through the contour 151. The sensor unit 152 is disposed on the control unit 150 so as to be within the contour. The second gear wheel axle 157 and the third gear wheel axle 158 can be additionally seen. A motor output shaft bearing 167 is shown in a further clearance 155 of the control unit 150.

TABLE-US-00001 List of reference signs 100 Drive device 110 Electric motor 112 Motor output shaft 114 Diameter 130 Gearbox 131 Third gear wheel 132 Gearbox input shaft 133 Second gear wheel 134 First bevel gear 135 Spur gear 136 Gearbox output shaft 137 First gear wheel 138 Second bevel gear 139 Rotary slide interface 140 Rotary slide output shaft 141 End region of rotary slide output shaft 142 Magnet 150 Control unit 151 Contour 152 Sensor unit 154 Clearance 155 Clearance 156 First gear wheel axle 157 Second gear wheel axle 158 Third gear wheel axle 160 Housing 161 Housing-proximal bearing 162 Interface 163 Sealing element 164 Plug connector 165 Housing opening 166 Housing cover 167 Motor output shaft bearing R Rotation axis