Drive device for a steering system and motor vehicle

Abstract

Drive device (6) for a steering device (5) for steering a first steerable wheel (2) and a second steerable wheel (3) of a motor vehicle (1), which form a left wheel and a right wheel of the motor vehicle (1), - with a housing (7) for attaching the drive device (6) to the motor vehicle (1), the longitudinal axis (8) of which defines an axial direction (X) and which has a first housing end (9) and a second housing end (10) which are axially opposite each other, - with a first steering rod (11) which is axially extended out of the housing (7) at the first housing end (9) for steering the first steerable wheel (2), is coupled to the first steerable wheel (2) and is axially adjustable in the housing (7) and rotatable about the housing (7) about an axis of rotation (15) running parallel to the axial direction (X), - with a second steering rod (13) which is axially extended out of the housing (7) at the second housing end (10) for steering the second steerable wheel (3), is coupling to the second steerable wheel (3) and is axially adjustable in the housing (7) and is arranged in a rotationally fixed manner with respect to the housing (7), - with a steering actuator (16) for axially adjusting the first steering rod (11) relative to the housing (7), which is fixedly arranged on the housing (7), - with a drive sleeve (18) which is rotatably arranged in the housing (7) about the axis of rotation (15), - with a tracking actuator (17) for rotating the drive sleeve (18) relative to the housing (7), which is fixedly arranged on the housing (7), - with a coupling sleeve (19) which is axially adjustable and rotationally fixed in the drive sleeve (18), - wherein the first steering rod (11) is connected to the coupling sleeve (19) in a rotationally and axially fixed manner, - wherein the second steering rod (13) is drive-coupled with the coupling sleeve (19) such that a rotational adjustment (20) of the coupling sleeve (19) relative to the housing (7) produces an axial adjustment (21) of the second steering rod (13) relative to the coupling sleeve (19).

Description

[0001] The present invention relates to a drive device for a steering system for steering a first steerable wheel and a second steerable wheel of a motor vehicle, which constitute a left wheel and a right wheel of the motor vehicle. The invention further relates to a motor vehicle whose steering system is equipped with such a drive device.

[0002] From DE 10 2022 104 584 A1, a drive device for a steerable axle of a motor vehicle is known, in which a steering spindle is provided having two opposing threads. A first spindle nut engages with one of the threads and is coupled to the first steerable wheel. A second spindle nut engages with the other thread and is coupled to the second steerable wheel. A steering actuator allows the spindle rod to be axially adjusted, thereby actuating the two steerable wheels for steering via the spindle nuts. A tracking actuator allows the spindle rod to be rotated, thereby axially adjusting the spindle nuts along the spindle rod. This allows the tracking of the two steerable wheels to be adjusted.In the known steering system, the track actuator is fixed in position relative to the tie rod, so that with every steering input, the track actuator is adjusted together with the spindle rod. This results in a comparatively high inertia for the known steering system, which makes dynamic steering intervention difficult.

[0003] From DE 10 2020 122 244 A1, a drive device for a steering system is known in which two steering rods are arranged coaxially within one another. The outer, first steering rod is adjusted relative to the vehicle by means of a steering actuator fixed to the vehicle. The inner, second steering rod is adjusted relative to the first steering rod by means of a tracking actuator bearing, which is fixed to the first steering rod. Thus, in this drive device as well, the tracking actuator is adjusted along with the first steering rod for steering operation. Consequently, this drive device also has a comparatively high inertia.

[0004] From DE 10 2024 001 586 B3 a drive device for a steering device for steering a first steerable wheel and a second steerable wheel of a motor vehicle is known, which form a left wheel and a right wheel of the motor vehicle.The drive device comprises a housing for mounting the drive device on the motor vehicle, a first steering rod which can be coupled to the first steerable wheel for steering the first steerable wheel and which is axially adjustable and rotationally fixed to the housing, a second steering rod which can be coupled to the second steerable wheel for steering the second steerable wheel, a main actuator for axially adjusting the first steering rod relative to the housing, which is fixedly mounted on the housing, a sliding sleeve which is axially adjustable and rotationally fixed to the housing and which is axially fixed and rotatably coupled to the first steering rod, and an auxiliary actuator for rotating the sliding sleeve relative to the housing, which is fixedly mounted on the housing.The second steering rod is coupled to the first steering rod in a rotationally fixed manner and is axially adjustable relative to it, and passes through the sliding sleeve and is drive-coupled to the sliding sleeve in such a way that a rotational adjustment of the sliding sleeve relative to the housing produces an axial adjustment of the second steering rod relative to the sliding sleeve.

[0005] From DE 10 2013 210 482 A1, a steering device for steering a rear axle of a multi-track motor vehicle having at least one rear axle and at least one front axle is known. The steering device comprises an actuator with which a steering movement can be executed between a point fixed to the vehicle and two pivot points of two steering linkages to which the actuator is connected. In order to advantageously combine the steering function with the realization of a track or camber adjustment, the known steering device provides that the actuator includes means with which its distance between the two pivot points can be changed.

[0006] The present invention addresses the problem of providing an improved or at least an alternative embodiment of a drive device for, or for, a motor vehicle equipped with such a device, which is characterized in particular by improved dynamics. At the same time, a reduced installation space requirement may be desired.

[0007] This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject matter of the dependent claims.

[0008] The invention is based on the general concept of arranging both the steering actuator and the tracking actuator in a fixed position relative to the housing of the drive device. A coupling sleeve is provided for the longitudinal adjustment of the two steering rods and for the tracking adjustment of the two steering rods. This coupling sleeve is configured to axially connect the two steering rods, and a rotation of the coupling sleeve causes the two steering rods to be axially adjusted relative to each other. The tracking drive is connected to the coupling sleeve via a drive sleeve, in which the coupling sleeve is axially adjustable. This decouples the drive coupling between the tracking actuator and the coupling sleeve from the steering movements of the steering rods and allows it to be fixed in position relative to the housing.By positioning the steering actuator and the tracking actuator in a fixed position relative to the housing, the inertia of the drive unit's moving parts is reduced, resulting in the drive unit presented here being characterized by high agility and dynamics. At the same time, these sleeves, arranged concentrically within each other and concentrically to the steering rods, require very little installation space.

[0009] In the present context, a “configuration” is synonymous with a “design” and / or “setup”, so that the phrase “configured so that” is synonymous with the phrase “designed so that” and / or “set up so that”.

[0010] Specifically, the invention proposes a drive device equipped with a housing, a first steering rod, a second steering rod, a steering actuator, a drive sleeve, a tracking actuator, and a coupling sleeve. The housing is configured for mounting the drive device to the motor vehicle. A longitudinal axis of the housing defines an axial direction. The housing has a first housing end and a second housing end that are axially opposed to each other. The first steering rod extends axially from the housing at the first housing end for steering the first steerable wheel and can be coupled to the first steerable wheel. Furthermore, the first steering rod is axially adjustable within the housing and rotatable about an axis of rotation parallel to the axial direction.The second steering rod extends axially from the housing at the second housing end to steer the second steerable wheel. It can be coupled to the second steerable wheel and is axially adjustable within the housing, while being rotationally fixed to the housing. The steering actuator is configured for axial adjustment of the first steering rod relative to the housing and is fixed in position relative to the housing. The drive sleeve is rotatably mounted within the housing about the axis of rotation. The tracking actuator is configured for rotary adjustment of the drive sleeve relative to the housing and is fixed in position relative to the housing. The coupling sleeve is axially adjustable and rotationally fixed within the drive sleeve. The first steering rod is rotationally and axially fixed to the coupling sleeve, while the second steering rod is drive-coupled to the coupling sleeve such that a rotary adjustment of the coupling sleeve relative to the housing produces an axial adjustment of the second steering rod relative to the coupling sleeve.Since the first steering rod is axially fixed to the coupling sleeve, an axial adjustment of the second steering rod relative to the coupling sleeve results in an axial adjustment of the second steering rod relative to the first steering rod, which changes the toe angle of the two steerable wheels.

[0011] The steering actuator and / or the tracking actuator can be fixed in position relative to the housing by ensuring that, in the installed state of the drive unit where the housing is attached to a component of the vehicle, the steering actuator and / or the tracking actuator are also attached to a component of the vehicle. However, a preferred configuration is one in which the steering actuator and / or the tracking actuator are fixed in position relative to the housing by being directly and rigidly attached to the housing.

[0012] In the drive device presented here, the steering actuator is configured to axially adjust the first steering rod, which is coupled to the second steering rod via the coupling sleeve, so that a steering adjustment of the first steering rod results in a uniform steering adjustment of the second steering rod. The tracking actuator is configured to rotate the coupling sleeve, which changes the axial distance between the two steering rods within the coupling sleeve, thus altering the tracking angle.

[0013] According to an advantageous embodiment, the tracking actuator can be configured as an electric motor which is connected to the drive sleeve via a self-locking or self-locking gearbox for rotary adjustment of the drive sleeve. When the electric motor is de-energized, the gearbox ensures that the drive sleeve is fixed in the housing against rotation, thus simplifying the design of the drive device.

[0014] In another advantageous embodiment, the tracking actuator can be connected to the drive sleeve via a worm gear. Such a worm gear can be configured to be self-locking or self-locking particularly easily. Furthermore, reliable power transmission for tracking adjustment can be achieved using such a worm gear. For example, the tracking actuator drives a worm of the worm gear that meshes with a worm wheel of the worm gear, the worm wheel being formed on the drive sleeve.

[0015] According to an advantageous embodiment, the drive sleeve may have axial internal teeth, while the coupling sleeve has corresponding axial external teeth that engage with the internal teeth, so that the coupling sleeve is rotationally fixed to the drive sleeve and axially adjustable relative to the drive sleeve. Such a toothing arrangement operates with high reliability. In particular, the internal teeth of the drive sleeve may be equipped with a friction-reducing coating. Additionally or alternatively, the external teeth of the coupling sleeve may also be provided with a friction-reducing coating.

[0016] A particularly advantageous embodiment is one in which the steering actuator is configured as an electric motor, which is driven by a non-self-locking or non-self-locking transmission to axially adjust the first steering rod. This ensures that the road surface conditions are effectively communicated to the driver via the steering system and steering wheel.

[0017] According to an advantageous embodiment, the first steering rod can have an external thread within the housing, which is coupled to a drive nut that is rotatably arranged about the axis of rotation and axially fixed within the housing. The steering actuator can then be connected to the drive nut via a drive train to drive it in a rotary manner. The rotation of the drive nut causes the first steering rod to be axially adjusted by means of the external thread. The drive train can advantageously be configured as a belt drive or chain drive. The drive nut can, in particular, be configured as a ball nut.

[0018] According to an advantageous embodiment, the steering actuator can be configured as an electric motor with a steering rotation axis. In other words, a rotor of the electric motor rotates around a rotation axis that defines the steering rotation axis. The steering actuator can then be mounted on the housing such that the steering rotation axis extends parallel to the axial direction and thus parallel to the axis of rotation. This results in an extremely compact design for the drive device. Furthermore, the tracking actuator can also be configured as an electric motor with a tracking rotation axis. In other words, the electric motor has a rotor that rotates around a rotation axis that forms the tracking rotation axis. The tracking actuator can then be mounted on the housing such that the tracking rotation axis extends at an angle to the axial direction and passes between the steering rotation axis and the axis of rotation.The steering rotation axis and the pivot axis run parallel to the axial direction and are therefore inclined to the tracking rotation axis. By positioning the tracking actuator on the housing such that the tracking rotation axis extends between the steering rotation axis and the pivot axis, a compact design can be achieved for the drive unit.

[0019] In another advantageous embodiment, the second steering rod may have a rack section within the housing that is drive-coupled to a sensor pinion such that an axial adjustment of the second steering rod generates a rotational adjustment of the sensor pinion. The sensor pinion interacts with a sensor system that detects the rotational position of the sensor pinion, so that the current steering angle and / or the current toe angle can be determined from the rotational position of the sensor pinion.

[0020] A particularly advantageous embodiment is one in which the rack section is coupled to the sensor pinion in such a way that the second steering rod is fixed against rotation relative to the housing by means of the sensor pinion. In other words, the second steering rod is supported against rotation by the rack section on the sensor pinion, which in turn is fixed against rotation on the housing. This ensures that the second steering rod is fixed against rotation on the housing via the sensor pinion. This design facilitates a compact construction.

[0021] A motor vehicle according to the invention has a first steerable wheel and a second steerable wheel on a steerable axle and is equipped with a steering device for steering the two steerable wheels. This steering device is equipped with a drive device of the type described above. The two steerable wheels form a left steerable wheel and a right steerable wheel. The first steering rod is drive-coupled to the first steerable wheel for steering it. The second steering rod is drive-coupled to the second steerable wheel for steering it.

[0022] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0023] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention as defined by the claims. Components of a higher-level unit, such as a device, apparatus, or arrangement, mentioned above and those to be mentioned below, which are designated separately, can form separate parts or components of this unit or be integral areas or sections of this unit, even if this is depicted differently in the drawings.

[0024] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components.

[0025] They show, schematically, Fig. 1. A highly simplified front view of a motor vehicle with a drive unit, Fig. 2 a view of the drive device, Fig. 3 a partially longitudinal section view of the drive device, Fig. 4 an enlarged, partially longitudinally sectioned view of the drive device in the area of ​​a coupling sleeve, Fig. 5 a partially cross-sectional view of the drive device in the area of ​​a drive sleeve, Fig. 6 an isometric view of the drive device in the area of ​​a sensor pinion.

[0026] Accordingly Fig. Figure 1 comprises a motor vehicle 1, which may preferably be a passenger car, a first steerable wheel 2 and a second steerable wheel 3, which are assigned to a common vehicle axle 4, which usually forms a front axle of the vehicle 1. The two steerable wheels 2, 3 form a left steerable wheel and a right steerable wheel on the vehicle 1, the relative locations left and right referring to the direction of travel of the vehicle 1 when traveling forward. The vehicle 1 is also equipped with a steering device 5, shown in a highly simplified form, which is configured to steer the two steerable wheels 2, 3 and which is equipped with a drive device 6, which is described below with reference to the Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. Section 6 will be explained in more detail. So that the steering device 5 in Fig. As can be seen, the vehicle 1 is shown transparently in the area of ​​the steering device 5.

[0027] According to the Fig. 2, Fig. 3 and Fig. The drive device 6 comprises a housing 7 configured for mounting the drive device 6 on the motor vehicle 1. The housing 7 has a longitudinal axis 8 defining an axial direction X. The housing 7 has a first housing end 9 and a second housing end 10, which are axially separated from each other. The drive device 6 is equipped with a first steering rod 11, which extends axially from the housing 7 at the first housing end 9 for steering the first steerable wheel 2 and, in the installed state, is coupled to the first steerable wheel 2, typically via a first tie rod 12, which is Fig. 1 is indicated. The drive device 6 is also equipped with a second steering rod 13, which serves to steer the second steerable wheel 3 and for this purpose extends out of the housing 7 at the second housing end 10. In the installed state of the drive device 6, the second steering rod 13 is coupled to the second steerable wheel 3, usually via a second tie rod 14, which is Fig. As indicated in Figure 1, the first steering rod 11 is axially adjustable within the housing 7 and rotatably arranged with respect to the housing 7 about a pivot axis 15 running parallel to the axial direction X. The pivot axis 15 falls within the Fig. 2, Fig. 3, Fig. 4 to Fig. 5 with the longitudinal axis 8 of the housing 7. In contrast, the second steering rod 13 is axially adjustable in the housing 7 and is arranged in a rotationally fixed manner with respect to the housing 7.

[0028] The drive device 6 is also equipped with a steering actuator 16 for axially adjusting the first steering rod 11 relative to the housing 7, which is fixedly arranged with respect to the housing 7. In the preferred embodiment shown here, the steering actuator 16 is fixedly mounted on the housing 7. The steering actuator 16 extends essentially parallel to the housing 7. The steering actuator 16 serves to adjust a steering angle at the two steerable wheels 2, 3. The drive device 6 is also equipped with a tracking actuator 17, which is fixedly arranged with respect to the housing 7. In the example shown, this is achieved by the tracking actuator 17 being fixedly mounted on the housing 7. The tracking actuator 17 extends transversely to the housing 7 and thus also transversely to the steering actuator 16. The tracking actuator 17 serves to adjust a tracking angle at the two steerable wheels 2, 3.

[0029] According to the Fig. 3 and Fig. 5. The drive device 6 is also equipped with a drive sleeve 18, which is rotatably arranged in the housing 7 about the axis of rotation 15. A coupling sleeve 19 is arranged in the drive sleeve 18, which is only in the Fig. 3 and Fig. As can be seen in Figure 4, the coupling sleeve 19 is axially adjustable and rotationally fixed within the drive sleeve 18. The tracking actuator 17 is configured to rotate the drive sleeve 18 relative to the housing 7. The first steering rod 11 is now rotationally and axially fixed to the coupling sleeve 19. In the example shown, an axial external toothing 46, formed radially on the outside of the first steering rod 11, engages with a complementary axial internal toothing 47, which is formed radially on the inside of the coupling sleeve 19. An interference fit can be provided between the external toothing 46 and the internal toothing 47. Furthermore, a retaining ring 48, located in the area of ​​the external toothing 46, can be provided to axially fix the first steering rod 11 to the coupling sleeve 19.

[0030] In contrast, the second steering rod 13 is drive-coupled with the coupling sleeve 19 in such a way that a Fig. 4 Rotary adjustment 20 of the coupling sleeve 19 relative to the housing 7 indicated by a double arrow Fig. 4. An axial adjustment 21 of the second steering rod 13 relative to the coupling sleeve 19 is generated, indicated by a double arrow. Since the first steering rod 11 is axially fixed with respect to the coupling sleeve 19, the axial adjustment 21 causes a change in the axial distance 22 within the coupling sleeve 19 between the first steering rod 11 and the second steering rod 13, which is Fig. As indicated in Figure 4, a change in the axial distance 22 leads to a change in the toe angle of the two steerable wheels 2 and 3. In the example shown, the drive coupling between the coupling sleeve 19 and the second steering rod 13 is achieved by an external thread 44 formed radially outside the second steering rod 13, which engages in a complementary internal thread 45 formed radially inside the coupling sleeve 19. Since the second steering rod 13 is arranged so as to be rotationally fixed and axially adjustable relative to the housing 7, a rotation of the coupling sleeve 19 relative to the housing 7 causes the second steering rod 13 to shift axially relative to the coupling sleeve 19.

[0031] The tracking actuator 17 can be configured as an electric motor 23, which is connected to the drive sleeve 18 via a self-locking or self-locking gearbox 24 for the rotary adjustment of the drive sleeve 18. The gearbox 24 can, in particular according to the example shown here, be designed as a worm gear 25, which has a worm 26 and a worm wheel 27. The tracking actuator 17 drives the worm 26. The worm 26 meshes with the worm wheel 27 and thereby drives the worm wheel 27. The worm wheel 27 is formed on the drive sleeve 18 or is rotationally fixed to it. As a result, the drive sleeve 18 also rotates via the worm wheel 27. The drive sleeve 18 is rotatable about the axis of rotation 15 in the housing 7 and may be mounted there. For example, a ball bearing 28 can be arranged in the area of ​​the worm gear 27 for the rotatable mounting of the drive sleeve 18 in the housing 7.A needle bearing 29 can be provided axially spaced from the ball bearing 28 for the rotatable mounting of the drive sleeve 18 in the housing 7.

[0032] In the example shown here, the drive sleeve 18 has an axial internal toothing 30. Complementarily, the coupling sleeve 19 has an axial external toothing 31 which engages with the internal toothing 30, such that the coupling sleeve 19 is rotationally fixed to the drive sleeve 18 and is axially adjustable relative to the drive sleeve 18.

[0033] Advantageously, the steering actuator 16 can be configured as an electric motor 32, which is connected to the first steering rod 11 via a non-self-locking or non-self-locking transmission 33 for axial adjustment of the first steering rod 11. For this purpose, the first steering rod 11 can have an external thread 34 inside the housing 7, which engages with or is coupled to a drive nut 35. The drive nut 35 is rotatably arranged about the axis of rotation 15 and axially fixed in the housing 7. For the rotary drive of the drive nut 35, the steering actuator 16 is advantageously connected to the drive nut 35 via a drive train 36. According to the example shown, the drive train 36 can be a belt drive. In another embodiment, the drive train 36 can also be a chain drive. The drive nut 35 can advantageously be configured as a ball nut.

[0034] The electric motor 32 of the steering actuator 16 is defined according to Fig. 5 a steering rotation axis 37, which in Fig. 5 is perpendicular to the drawing plane. The electric motor 23 of the track actuator 17 is defined according to Fig. 5 a track rotation axis 38, which in Fig. 5 lies in the drawing plane. Fig. In addition, the longitudinal axis 8 and the rotation axis 15 are shown in figure 5; these coincide and are each perpendicular to the drawing plane. Fig. In this case, the axial direction X is also perpendicular to the plane of the drawing. The steering actuator 16 is mounted on the housing 7 such that the steering rotation axis 37 extends parallel to the axial direction X and thus parallel to the longitudinal axis 8 or parallel to the axis of rotation 15. In contrast, the tracking actuator 17 is mounted on the housing 7 such that the tracking rotation axis 38 extends at an angle to the axial direction X and thus at an angle to the longitudinal axis 8 or at an angle to the axis of rotation 15. Furthermore, the tracking actuator 17 is mounted on the housing 7 such that the tracking rotation axis 38 extends between the steering rotation axis 37 and the axis of rotation 15. This results in a particularly compact design for the drive device 6.

[0035] The drive device 6 can be arranged according to the Fig. 2 and Fig. 3 be equipped with a sensor device 39 which measures in Fig. 6 has a recognizable sensor pinion 40. The second steering rod 13 can be located within the housing 7 in the area of ​​this sensor device 39. Fig. 6 identifiable rack section 41, which is drive-coupled to the sensor pinion 40. The coupling is such that a in Fig. 6 Axial adjustment 42 of the second steering rod 13 indicated by a double arrow Fig.The rotational adjustment 43 of the sensor pinion 40, indicated by a double arrow, is generated. The sensor device 39 can now incorporate a sensor (not shown here) which evaluates the rotational adjustment 43 of the sensor pinion 40 and, depending on this, can determine a steering angle or a toe angle. The embodiment shown here is particularly advantageous, in which the rack section 41 is drive-coupled to the sensor pinion 40 in such a way that the second steering rod 13 is arranged in a rotationally fixed manner relative to the housing 7 by means of the sensor pinion 40.

Claims

[1] Drive device (6) for a steering device (5) for steering a first steerable wheel (2) and a second steerable wheel (3) of a motor vehicle (1), which form a left wheel and a right wheel of the motor vehicle (1), - with a housing (7) for attaching the drive device (6) to the motor vehicle (1), the longitudinal axis (8) of which defines an axial direction (X) and which has a first housing end (9) and a second housing end (10) which are axially opposite each other, - with a first steering rod (11) which is axially extended out of the housing (7) at the first housing end (9) for steering the first steerable wheel (2), is coupled to the first steerable wheel (2) and is axially adjustable in the housing (7) and rotatable about the housing (7) about an axis of rotation (15) running parallel to the axial direction (X), - with a second steering rod (13) which is axially extended out of the housing (7) at the second housing end (10) for steering the second steerable wheel (3), is coupling to the second steerable wheel (3) and is axially adjustable in the housing (7) and is arranged in a rotationally fixed manner with respect to the housing (7), - with a steering actuator (16) for axially adjusting the first steering rod (11) relative to the housing (7), which is fixedly arranged on the housing (7), - with a drive sleeve (18) which is rotatably arranged in the housing (7) about the axis of rotation (15), - with a tracking actuator (17) for rotating the drive sleeve (18) relative to the housing (7), which is fixedly arranged on the housing (7), - with a coupling sleeve (19) which is axially adjustable and rotationally fixed in the drive sleeve (18), - wherein the first steering rod (11) is connected to the coupling sleeve (19) in a rotationally and axially fixed manner, - wherein the second steering rod (13) is drive-coupled with the coupling sleeve (19) such that a rotational adjustment (20) of the coupling sleeve (19) relative to the housing (7) produces an axial adjustment (21) of the second steering rod (13) relative to the coupling sleeve (19). [2] Drive device (6) according to claim 1, characterized by , - that the track actuator (17) is configured as an electric motor (23) which is connected to the drive sleeve (18) via a self-locking or self-locking gearbox (24) for rotating adjustment of the drive sleeve (19). [3] Drive device (6) according to one of the preceding claims, characterized by , - that the track actuator (17) is connected to the drive sleeve (18) via a worm gear (25). [4] Drive device (6) according to one of the preceding claims, characterized by , - that the drive sleeve (18) has an axial internal toothing (30), - that the coupling sleeve (19) has an axial external toothing (31) which engages with the internal toothing (30), so that the coupling sleeve (19) is rotationally fixed to the drive sleeve (18) and is axially adjustable relative to the drive sleeve (18). [5] Drive device (6) according to any of the preceding claims, characterized by , - that the steering actuator (16) is configured as an electric motor (32) which is connected to the first steering rod (11) via a non-self-locking or non-self-locking transmission (33) for axial adjustment of the first steering rod (11). [6] Drive device (6) according to one of the preceding claims, characterized by , - that the first steering rod (11) has an external thread (34) inside the housing (7) which is drive-coupled to a drive nut (35) which is rotatably and axially fixedly arranged in the housing (7) about the axis of rotation (15), - that the steering actuator (16) is connected to the drive nut (35) via a drive train (36) for rotating the drive nut (35). [7] Drive device (6) according to one of the preceding claims, characterized by , - that the steering actuator (16) is configured as an electric motor (32) which has a steering rotation axis (37), - that the steering actuator (16) is attached to the housing (7) in such a way that the steering rotation axis (37) extends parallel to the axial direction (X), - that the track actuator (17) is configured as an electric motor (23) which has a track rotation axis (38), - that the tracking actuator (17) is attached to the housing (7) in such a way that the tracking rotation axis (38) extends inclined to the axial direction (X) and extends between the steering rotation axis (37) and the rotation axis (15). [8] Drive device (6) according to one of the preceding claims, characterized by , - that the second steering rod (13) has a rack section (41) inside the housing (7) which is drive-coupled to a sensor pinion (40) such that an axial adjustment (42) of the second steering rod (13) produces a rotary adjustment (43) of the sensor pinion (40). [9] Drive device (6) according to claim 8, characterized by , - that the rack section (41) is coupled to the sensor pinion (40) in such a way that the second steering rod (13) is arranged in a rotationally fixed manner with respect to the housing (7) by means of the sensor pinion (40). [10] Motor vehicle (1), - with a first steerable wheel (2) and with a second steerable wheel (3), - with a steering device (5) for steering the two steerable wheels (2, 3) which is equipped with a drive device (6) according to one of the preceding claims, - wherein the two steerable wheels (2, 3) form a left steerable wheel and a right steerable wheel, - wherein the first steering rod (11) is drive-coupled with the first steerable wheel (2) for steering the first steerable wheel (2), - wherein the second steering rod (13) is drive-coupled with the second steerable wheel (3) for steering the second steerable wheel (3).

Images