Abstract
A lifting device (10) for moving a motor vehicle, comprising a support structure (100, 100a) suitable to be removably or firmly connected to a vehicle underbody of the motor vehicle, and at least one drive shaft (220) which is rotatably mounted on the support structure (100, 100a). The at least one drive shaft (220) is part of a rotary blade drive (200), which rotary blade drive (200) additionally comprises at least one drive motor (211) for rotating the drive shaft (220) about the axis of rotation (221) thereof, and at least one rotary blade (240), that is connected to the drive shaft (220) so as to be able to rotate about the axis of rotation (221) such that the rotary blade (240) can be supported on the ground and the motor vehicle can be lifted and/or moved as a result of the torque (M) acting along the drive shaft (220).
Claims
1. A lifting device (10) for moving a motor vehicle with a support structure (100, 100a) which is suitable to be removably or firmly connected to the motor vehicle, and at least one drive shaft (220) which is rotatably mounted on the support structure (100, 100a), characterized in that the at least one drive shaft (220) is part of a rotary blade drive (200), wherein the lifting device has at least one rotary drive (200), each rotary blade drive (200) furthermore having at least one drive motor (211) for rotating the drive shaft (220) about the axis of rotation (221) thereof, and at least one rotary blade (240), wherein the rotary blade (240) is rotatably connected to the drive shaft (220) about the axis of rotation (221) such that the rotary blade (240) can be supported on a ground and the motor vehicle can be lifted and/or or moved as a result of a torque (M) acting along the drive shaft (220).
2. (canceled)
3. The lifting device (10) according to claim 1, characterized in that the at least one rotary blade (240) has a radially inner rotary blade arm (240a) assigned to the drive shaft (220) and a radially outer rotary blade arm (240b) assigned to the ground, wherein the radially inner rotary blade arm (240a) and the radially outer rotary blade arm (240b) are pivotally interconnected, such that the at least one rotary blade (240) can be pivoted from a retracted position running parallel to the drive shaft (220) into an extended position forming an angle with the drive shaft (220), preferably running perpendicular to the drive shaft (220).
4. The lifting device (10) according to claim 3, characterized in that the at least one rotary blade (240) has a radially inner rotary blade arm (240a) assigned to the drive shaft (220) and a radially outer rotary blade arm (240b) assigned to the ground, as well as a rotary blade arm section (240c) having one or more guide rails (244) with associated guide slides (245), such that an offset of the radially inner rotary blade arm (240a) relative to the radially outer rotary blade arm (240b) can be adjusted.
5. (canceled)
6. The lifting device (10) according claim 1, characterized in that the lifting device (10) has at least one rotary blade drive (200), wherein each rotary blade drive (200) is connected to the support structure (100, 100a) by means of a respective drive shaft (220) and a front rotary blade drive (200) of a vehicle front axle (1) or a rear rotary blade drive (200) are assigned to a vehicle rear axle (2).
7. The lifting device (10) according claim 6, characterized in that each drive shaft (220) has at least one rotary blade (240), preferably two rotary blades (240).
8. (canceled)
9. The lifting device (10) according to claim 7, characterized in that a stabilization device (260) is arranged on one, multiple, or all rotary blades (240), which device is provided for the lateral stabilization of the motor vehicle.
10. The lifting device (10) according to claim 7, characterized in that a rotary blade support (270) is arranged on one, multiple, or all rotary blades (240) and can be pivoted about a support edge (242) of the rotary blade (240).
11. The lifting device (10) according to claim 1, characterized in that one, multiple, or all rotary blades (240) have a radially inner rotary blade arm (240a) assigned to the drive shaft (220) and a radially outer rotary blade arm (240b) assigned to the ground, wherein the radially inner rotary blade arm (240a) and the radially outer rotary blade arm (240b) are radially displaceable relative to one another, whereby the radial length (r) of the respective rotary blade (240) can be adjusted.
12. The lifting device (10) according claim 1, characterized in that the support structure (100, 100a) has guide rails (110a, 110b) and guide rods (120a, 120b) that can be moved relative to one another along the longitudinal direction (y) of the vehicle, wherein the guide rails (110a, 110b) are suitable for a removable or fixed connection to the underbody of the motor vehicle, on the front of the vehicle, on the rear of the vehicle, on the vehicle roof or on the hood or optionally within the vehicle interior or trunk and the guide rods (120a, 120b) are connected to the at least one rotary blade drive (200).
13. The lifting device (10) according to claim 12, characterized in that the guide rails (110a, 110b) and the guide rods (120a, 120b) are connected to at least one linear actuator (130) for movement relative to one another and along the vehicle longitudinal direction (y), wherein a first end section (131) of the at least one linear actuator (130) is connected to a guide rod (120a, 120b) and a second end section (132) of the at least one linear actuator (130) is connected to a guide rail (110a, 110b).
14. The lifting device (10) according to claim 6, characterized in that the drive shaft (220), for axially moving the at least one rotary blade (240) along the axis of rotation (221) thereof, comprises an inner shaft (220a) connected to the drive motor (211) and at least one hollow shaft (220b) connected to the at least one rotary blade (240) and coaxially surrounding the inner shaft (220a), wherein the inner shaft (220a) and the hollow shaft (220b) are movable relative to one another along the axis of rotation (221) and are in a torque-transmitting operative connection with one another.
15. The lifting device (10) according to claim 12, characterized in that the guide rails (110a, 110b) and the guide rods (120a, 120b) can be locked in a transport position by means of a locking unit.
16. The lifting device (10) according to claim 6, characterized by at least one support device (400) which is firmly connected to the drive shaft (220) and can be rotated together with it about the axis of rotation (221) for additional support of the motor vehicle.
17. The lifting device (10) according to claim 16, characterized in that the support device (400) has a support carrier arm (410) and a support foot (420), wherein the support carrier arm (410) can be firmly connected to the drive shaft (220) via a first end section (411) and the support foot (420) can be pivotably articulated to a second end section (412) of the support carrier arm (410).
18. The lifting device (10) according to claim 17, characterized in that the support foot (420) has a support foot upper part (422) and a support foot base (423), wherein the support foot upper part (422) is articulated to the second end section (412) of the support carrier arm (410) and the support foot base (423) is pivotably connected to the support foot upper part (422).
19. (canceled)
20. The lifting device (10) according to claim 7, characterized in that at least one rotary blade (240) or at least one rotary blade support (270) or at least one stabilizing device (260) or at least one support foot (420) or at least one support foot base (423) is formed with a traction pattern (280) for resting on the ground.
21. A support device (400) for a lifting device (10) having a drive shaft (220), according to claim 6, characterized in that the support device (400) has a support carrier arm (410) and a support foot (420), which support carrier arm (410) can be firmly connected to the drive shaft (220) via a first end section (411) and which support foot (420) is articulated to a second end section (412) of the support carrier arm (410), wherein the support foot (420) particularly has a support foot upper part (422) and a support foot base (423), which support foot upper part (422) is articulated to the second end section (412) of the support carrier arm (410) and which support foot base (423) is pivotally connected to the support foot upper part (422).
22. A motor vehicle with a lifting device (10) according to claim 1, characterized in that a drive unit driving the at least one drive motor (211) and/or or the at least one linear actuator (130) and/or or other actuators can be arranged in a loading space and/or or trunk and/or or engine compartment of the motor vehicle.
23. A motor vehicle lifting device (10) according to claim 22, characterized in that the lifting device (10) is positioned on the front of the vehicle, on the rear of the vehicle, on the vehicle roof or on the hood, in a space-saving manner under the vehicle underbody or optionally within the vehicle interior or trunk.
24. The lifting device (10) according to claim 14, characterized in that the inner shaft (220a) and the hollow shaft (220b) can be locked in a transport position by means of a locking unit.
Description
BRIEF DESCRIPTION OF THE VIEWS OF THE DRAWINGS
[0064] Further details, features, (sub)combinations of features, advantages, and effects based on the invention can be derived from the following description of preferred exemplary embodiments of the invention and the drawings. Wherein, schematically,
[0065] FIG. 1 shows a plan view of a first exemplary embodiment of a lifting device according to the invention with a support construction, two rotary blade drives and two support devices,
[0066] FIG. 2 shows a detailed perspective view of a rotary blade drive of an exemplary embodiment of a lifting device according to the invention,
[0067] FIG. 3 shows a perspective view of an exemplary embodiment of a lifting device according to the invention, wherein the rotary blade drive is extended into a drive position,
[0068] FIG. 4 shoes a detailed perspective view of an exemplary embodiment of a support device for a lifting device according to the invention,
[0069] FIG. 5 shows a perspective view of an exemplary embodiment of a spring lock,
[0070] FIG. 6 shows a perspective view of an exemplary embodiment of a lifting device according to the invention, wherein a rotary blade drive and a support structure are arranged at an angle to one another,
[0071] FIG. 7 shows a perspective view of an exemplary embodiment of a stabilization device,
[0072] FIG. 8 shows a perspective view of an exemplary embodiment of a lifting device according to the invention with a traction pattern,
[0073] FIG. 9 shows a perspective view of an exemplary embodiment of a lifting device according to the invention with a drive motor arranged in parallel,
[0074] FIG. 10 shows a perspective view of an exemplary embodiment of a lifting device according to the invention in a flatter design,
[0075] FIG. 11 shows a perspective view of an exemplary embodiment of a lifting device of the invention for peripheral attachment to the motor vehicle,
[0076] FIG. 12 shows a perspective view of the drive shaft and the drive motor of the embodiment of FIG. 11,
[0077] FIG. 13 shows a perspective view of the embodiment of FIG. 11 with two pivotably and adjustably formed rotary blades,
[0078] FIG. 14a shows a perspective view of a rotary blade which can be manually adjusted in length, and
[0079] FIG. 14b shows a perspective view of a rotary blade which can be adjusted in length by means of an actuator.
[0080] The figures are merely exemplary in nature and are only used for understanding the invention. Like elements are always provided with like reference numerals, which is why they are usually only described once. The embodiments shown are for the most part symmetrical with respect to their longitudinal and transverse axes. For the sake of clarity, elements that mirror on these axes are mostly identified only once by one reference numeral in the figures.
DETAILED DESCRIPTION OF THE INVENTION
[0081] FIG. 1 shows a schematic representation of a first exemplary embodiment of a lifting device 10 according to the invention with a support structure 100, two rotary blade drives 200 and two support devices 400 from above, viewed from the motor vehicle in the direction of the ground. In addition, the vehicle front axle 1, the vehicle rear axle 2, and the vehicle wheels 3 are indicated schematically in FIG. 1 in order to enable a better understanding of the orientation and the size ratios. For each of the rotary blade drives 200, the support structure 100 comprises a pair of guide rails 110a located on the inside with respect to a vehicle transverse direction x and a pair of guide rails 110b located on the outside with respect to the vehicle transverse direction x, each of which running along a vehicle longitudinal direction y and can be permanently or removably connected to the vehicle underbody of the motor vehicle. Inside the guide rails 110a, 110b, there are guide rods 120a, 120b which can be linearly pushed back and forth in the vehicle longitudinal direction y. A first end 121 of an inner guide rod 120a is connected to a drive shaft 220 of the respective rotary blade drive 200 by means of a bearing 140, particularly a pivot bearing, such that the inner guide rods 120a carry the weight of the motor vehicle. Accordingly, the first ends 121 of the outer guide rods 120b are connected to a drive carrier 210 of the respective rotary blade drive 200, such that the outer guide rods 120b carry the respective rotary blade drive 200.
[0082] The guide rails 110a, 110b are designed as rectangular tubes in this embodiment, but can also take any other shapes, e.g. round tubes or T-beams, etc. To protect the guide rails 110a, 110b from dirt ingress and lubricant discharge, dirt stripping seals 150 can be arranged at each inlet and outlet of the rails.
[0083] Linear actuators 130 are provided for the linear movement of the guide rods 120a, 120b in the guide rails 110a, 110b. A first end section 131 of a linear actuator 130 is connected to a second end 122 of the guide rods 120a, 120b by means of a connecting rod 133. The connecting rods 133 also connect the inner guide rods 120a to the outer guide rods 120b and, optionally, connect the two connected pairs again to one another, such that such a unit of four guide rods 120a, 120b can be moved as a whole. A second end section 132 of a linear actuator 130 is connected to the respective guide rails 110a, 110b. In the simplest variant, a linear actuator 130 located on the inside with respect to the vehicle transverse direction x is provided for moving the rotary blade drive 200 assigned to the vehicle front axle 1, and two external linear actuators 130 are provided for moving the rotary blade drive 200 assigned to the vehicle rear axle 2. According to the present illustration, the linear actuators 130 can be arranged in linear actuator guide rails 134 in the event that additional guiding is necessary. This can be the case, for example, if, as shown here, multiple, preferably two, linear actuators 130 are arranged and connected in series in a linear actuator guide rail 134 to increase the travel distance and to protect against dirt and mechanical damage. The two linear actuators 130 could also be combined into an accordingly long, individual, particularly hydraulic or pneumatic linear actuator 130. In such an embodiment, the linear actuator guide rails 134 could then be eliminated. To precisely align the linear actuators 130 and their linear actuator guide rails 134 with the guide rods 120a, 120b to be moved, and to stabilize them against bending moments, the linear actuator guide rails 134 are connected by means of spacer connecting rods 135 to spacers 136 , which in turn are connected to the outer guide rails 110b.
[0084] In FIG. 1, the rotary blade drives 200 are each shown in a transport position in which the respective rotary blade drive 200 is arranged below the vehicle underbody. The rotary blade drives 200 can be extended via the support structure 100 by means of the associated guide rods 120a, 120b into a drive position in which the rotary blade drive 200 protrudes in front of or behind the motor vehicle. Depending on requirements, the rotary blade drive 200 assigned to the vehicle front axle 1 and the rotary blade drive 200 assigned to the vehicle rear axle can each be extended and/or retracted individually or together.
[0085] FIG. 2 shows a detailed perspective view of a rotary blade drive 200 of an exemplary embodiment of a lifting device 10 according to the invention in the transport position, viewed from the vehicle underbody in the direction of the ground. Drive motors 211 and reduction gears 212 are attached to the drive carrier 210, and their drive and output shafts are connected to one another. In contrast to what is shown in FIG. 1, the drive motors 211 in this embodiment are more space-saving, arranged at an angle of, for example, 90° to the reduction gear 212, and connected via an angular gear 213. The angular gear 213 directs the torque at the desired angle, in this case 90°, from the drive motor 211 to the reduction gear 212. The drive motors can use different physical drive principles and be electrical, pneumatic, hydraulic, etc., for example. The output shafts of the reduction gears 212 are positively seated in respective recesses in the drive shaft 220. The drive shaft 220 is shown here as a square shaft, but could also have other cross-sectional shapes, e.g. round. The bearings 140, such as roller or slide bearings, are arranged on two sections of the drive shaft 220. The drive shaft 220 can rotate about its axis of rotation 221 in these bearings 140 as often as desired. The bearings 140 sit in bearing supports 141, which in turn are connected to the first ends 121 of the inner guide rods 120a.
[0086] A rotary blade 240 is located between a bearing 140 and the drive carrier 210 and is firmly connected to the drive shaft 220 via a connecting section 241 arranged at a radially inner end, such that the rotary blade 240 can be rotated together with the drive shaft 220 and about the axis of rotation 221 thereof. The rotary blades 240 are each shown here in a retracted position and extend radially, parallel, or horizontally to the vehicle underbody, in the direction of a radially outer end on which a support edge 242 is arranged. If the drive shaft 220 is set in rotation, the rotary blades 240 rotate as well. As soon as these touch the ground, they begin to lift the motor vehicle from an operating position into an at least partially lifted position and at the same time pull or push it in the respective direction of rotation as a result of the torque M that acts along the axis of rotation 221.
[0087] In FIGS. 1 and 2, the lifting device 10 is shown as it takes up the smallest possible installation space during normal driving of the motor vehicle. Particularly, the rotary blade drives 200 are located in a transport position arranged below the vehicle underbody, and the rotary blades 240 are arranged in a retracted position running horizontally to the vehicle underbody.
[0088] FIG. 3 shows a perspective view of an exemplary lifting device 10 from below, viewed from the ground in the direction of the vehicle underbody. The lifting device 10 is shown here as it holds the motor vehicle in an at least partially lifted position. For this purpose, the rotary blades 240 are shown in an extended position and run perpendicular to the vehicle underbody or form an angle of approximately 90° with the vehicle underbody. Furthermore, the entire rotary blade drive 200 is also in the drive position in which the guide rods 120a, 120b are extended and the rotary blade drive 200 protrudes in front of or behind the vehicle underbody. This drive position is particularly necessary for moving the motor vehicle to enable the rotary blades 240 to rotate completely around the drive shaft 220 without them hitting, or getting stuck, on the vehicle underbody. To move the motor vehicle, the rotary blades 240 can rotate along a direction of rotation from the retracted position into the extended position, as a result of which the motor vehicle is lifted and pulled or pushed and/or displaced relative to the ground. The rotary blades 240 then continue to rotate along the same direction of rotation back into the retracted position until a 360° rotation is completed. At the same time, the motor vehicle is pushed or pulled further and, offset by a respective distance, touches down again on its vehicle wheels 3. This process can be repeated any number of times in order to move the motor vehicle along any distance.
[0089] In order to increase the traction of the rotary blades 240, particularly on smooth surfaces such as black ice or snow, they have a corrugated structure and/or spike-like tips on their support edge 242, which can also “claw” into hard surfaces. For particularly soft surfaces, as shown here, a support device 400 can be arranged as an option between the two rotary blades 240. According to FIG. 3, the support device 400 is also in an extended position in which a support carrier arm 410 extends perpendicular to the vehicle underbody. The support carrier arm 410 is firmly connected to the drive shaft 220 via a first end section 411 and is rotatable about its axis of rotation 211. A support foot 420 is articulated to a second end section 412 such that it can rotate about a fastening axis 421, such that the support foot 420, following the force of gravity, assumes a horizontal orientation relative to the ground.
[0090] In the detailed perspective view according to FIG. 4, the support device 400 is shown from above, viewed from the vehicle underbody in the direction of the ground, in a retracted position running horizontally relative to the vehicle underbody. In this position, the support foot 420 is pivoted about the fastening axis 421 and forms an extension of the support carrier arm 410. It can be clearly seen that the support foot 420 is designed in two parts and comprises a support foot upper part 422 and a support foot base 423, which in the retracted position are arranged adjacent to one another and as flat as possible on the vehicle underbody to save space. To pivot the support foot base 423 in the extended position of the support device 400 into a position below the support foot upper part 422 (see FIG. 3), a swivel arm 450 can be rotated by means of a pivot drive motor 440 about an axis which runs between two round toothed elements 431 of a support foot pivot gear 430. The other end of the swivel arm 450 runs rotatably through the axis which connects the two toothed elements 431 attached to the support foot base 423, such that they roll over one another when the support foot base 423 is pivoted. The support foot base 423 also has a traction pattern 280 intended to rest on the ground as well as retaining bolts 424 protruding on the opposite side in order to fix the support foot base 423 in complementary mating openings of the support foot upper part 422. As a result, the force that is transmitted to the support foot base 423 by the support foot upper part 422 is not conducted via the support foot pivoting gear 430, which is thus protected. To travel through the large angular range in which neither the rotary blades 240 nor the support foot bases 423 contact the ground in a short time, but at a low torque when the drive shaft 220 rotates, a gear change actuator can be provided which, in the no-load condition, moves into a higher gear and switches back into a low working gear shortly before contacting the ground.
[0091] A schematic perspective view of a spring lock 300 can be seen in FIG. 5. The spring lock 300 can be attached, for example, to the shock absorber spring 4 of a vehicle wheel 3 to prevent rebounding and thereby to increase the achievable height to which the motor vehicle can be lifted. A toothed rack carrier 310, to which a toothed rack 311 is attached, is attached to the spring plate 5 connected to the wheel suspension. A motor support 320 with a servomotor 321, on the other hand, is connected to the shock absorber spring 4. The servomotor 321 is in turn connected by means of its drive shaft to a servomotor gear wheel 322 which engages in the teeth of the toothed rack 311. In the no-load state, the servomotor 321 is rotated by the rack 311 which is moved up and down due to unevenness in the ground. A load can be applied to the servomotor 321 and thereby lock the shock absorber spring 4 or even actively compress it to prevent the vehicle wheels 3 from rebounding when the motor vehicle is lifted.
[0092] FIG. 6 also shows a perspective view of an exemplary embodiment of a lifting device 10 according to the invention from above, viewed from the vehicle underbody towards the ground. The rotary blade drive 200 shown and the support structure 100 are arranged here forming an angle α with one another. The angular arrangement makes it possible to increase the distance between the rotary blade drive 200 and the ground. The size of the angle α depends on the space below the motor vehicle that is available in front of the vehicle front axle 1 or behind the vehicle rear axle 2. The larger the angle α, the larger the slope angle that the motor vehicle can climb or overcome in the terrain. FIG. 6 still shows another optional embodiment variant, in which the rotary blades 240 each have a transverse wheel 250 on their supporting edge 242, the axis of rotation of which is perpendicular to the axis of rotation of the vehicle wheels 3. The transverse wheels 250 protrude beyond the support edge 242 of the respective rotary blade 240, such that the transverse wheels 250 can roll on the ground in the extended position of the rotary blades 240 (not shown here). Each transverse wheel 250 is assigned a transverse wheel drive 251, which enables the respective transverse wheel 250 to rotate in two directions of rotation. For example, the motor vehicle can be rotated about its vertical axis by rotating the transverse wheels 250 assigned to a vehicle front axle 1 in one direction of rotation and the transverse wheels 250 assigned to a vehicle rear axle 2 in an opposite direction of rotation. The motor vehicle can be moved sideways if all transverse wheels 250 rotate in the same direction of rotation.
[0093] A stabilization device 260, which can optionally be arranged on a support edge 242 of a rotary blade 240, can be seen in the perspective view according to FIG. 7. The stabilization device 260 comprises a stabilization carrier 261 with an internal linear actuator which can extend a stabilization rod 262 laterally along the support edge 242 of the respective rotary blade 240 or along the vehicle transverse direction x. In the extended state (not shown here), the support edge 242 is consequently extended by the stabilizing rod 262, such that the motor vehicle is stabilized against lateral tilting in the lifting position.
[0094] According to the perspective detailed view from FIG. 8, the support edge 242 of a rotary blade 240 can additionally or optionally be connected to a pivotably attached rotary blade support 270. The rotary blade support 270 is provided to increase the traction on particularly soft ground and, due to the connection implemented pivotably by means of a joint 271, automatically aligns itself with the support on the ground, following the force of gravity. The rotary blade support 270 is also provided with a traction pattern 280. Furthermore, FIG. 8 shows another embodiment variant in which the drive carrier 210, the drive motor 211, and the reduction gear 212 are arranged between the inner guide rods 120a. The drive carrier 210 is also fastened to the inner guide rods 120a, as a result of which the outer guide rods 120b (see FIG. 1) can be eliminated. The drive shaft 220 is firmly connected to a drive shaft gear 222, on which the reduction gear 212 can engage either with a gear output gear wheel or with a drive chain to transmit the torque. In this embodiment, it is advantageous that the rotary blades 240 can be made wider in order to better stabilize the motor vehicle against tipping in the at least partially raised lifting position.
[0095] FIG. 9 shows a perspective view of an exemplary embodiment of a lifting device 10 according to the invention with a drive motor 211 arranged laterally parallel to the reduction gear 212. The drive motor 211 and the reduction gear 212 are connected in the torque flow by means of a chain, which is why the drive shaft of the drive motor 211 and the input shaft of the reduction gear 212 each comprise a sprocket. Due to the parallel arrangement, additional space can be saved overall and the width of the drive carrier 210 can be reduced.
[0096] As a rule, vehicles have more ground clearance under the front and rear bumpers or under the front engine area or the rear trunk area than, for example, between the vehicle axles 1, 2. The drive supports 210 with their drive motors 211 and reduction gears 212 of the embodiments described above are placed in the area of higher ground clearance, which thereby do not further restrict the ground clearance of the motor vehicle despite their greater thickness than that of the other components of the lifting device 10. For motor vehicles that do not have this higher ground clearance or to increase the insurmountable slope angle, the perspective view of FIG. 10 shows another exemplary embodiment of a lifting device 10 according to the invention in a flatter design. The drive supports 210 are just as flat here as the other components of the lifting device 10, in that the drive motors 211 and the reduction gears 212 are of a flatter design. In this way, the drive supports 210 can be placed at any desired positions below the vehicle underbody. Optionally, two or more drive motors 211 can be arranged in parallel next to one another and connected via associated gears to increase the power and the torque. To make the drive shaft 220 flatter as well, it is conceivable to integrate the rotary blades 240 and the support carrier arm 410 into the drive shaft 220 or to form them in one piece. Accordingly, the bearing support 141 of the bearing 140 can also be integrated into the guide rods 120a.
[0097] FIG. 11 shows a perspective view of another exemplary embodiment of the lifting device 10 according to the invention for peripheral fastening to the motor vehicle, preferably to the vehicle underbody. In the assembled state of the lifting device 10, the support structure 100a runs parallel to the vehicle underbody and is fixedly or removably connected thereto, particularly to the longitudinal members of the vehicle underbody, or to other components of the motor vehicle. At the respective peripheral ends of the support structure 100a, bearings 140 are mounted in bearing supports 141, in which bearings the drive shaft 220 is both rotatably and movably supported. The bearings 140 thus serve both as radial bearings and as axial guides for the drive shaft 220. The lifting device 10 shown is shown in a transport position, with the drive shaft 220 in the assembled state in front of or behind the motor vehicle and the rotary blades 240, which are firmly connected for torque transmission to the axial ends of the drive shaft 220, point perpendicular to the support structure 100a in the direction of the vehicle roof\
[0098] To enable axial movement of the rotary blades 240 into a position protruding beyond the lateral dimensions of the motor vehicle, the drive shaft 220 is configured as an inner shaft 220a, not visible in FIG. 11, coaxially surrounded by two adjacent hollow shafts 220b, wherein each hollow shaft 220b is firmly connected at its axially outer end to a rotary blade 240. A flange-like sliding disk 220c, which represents a first force application point for at least one respective linear actuator 130, is arranged on the axially inner ends of the hollow shafts 220b. The linear actuator 130 forms a sliding contact with the sliding disk 220c by means of a clamp 130a, such that axial transmission of force is made possible without impeding the rotation of the sliding disk 220c and the hollow shaft 220b connected thereto. The second force application point for the linear actuator 130 must be provided on an immovable, rigid component, for example on the bearing supports 141. In the transport position of the lifting device 10, in which the rotary blades 240 should not protrude beyond the lateral dimensions of the motor vehicle, the hollow shafts 220b in the retracted position of the rotary blades are each pushed over the inner shaft 220a, which is not visible for this reason.
[0099] A drive motor 211 is either directly axially aligned or connected indirectly, for example via a toothed wheel, toothed belt drive, chains or a V-belt to an input shaft of a reduction gear 212. The drive shaft 220 can be set in rotation via the reduction gear 212 by means of the drive motor 211, which is arranged axially offset in this embodiment. The drive motor 211 and the reduction gear 212 are part of a torque booster unit 214. To prevent the torque booster unit 214 from rotating itself due to its own counter-torque after activation of the drive motor 211, it is supported, preferably via fastening elements (not shown here), on non-movable, rigid parts of the motor vehicle (e.g. on the trailer coupling, the bumper, etc.) or on the support structure 100a.
[0100] A detailed perspective illustration of the torque booster unit 214 can be seen in FIG. 12. To rotate the drive shaft 220 about its axis of rotation 221, the drive motor 211 which is connected to the reduction gear 212 via the motor gear chain 214a transmits its torque to the drive sprockets 214b, which in turn drive the inner shaft drive sprockets 216 connected to the inner shaft 220a by means of drive chains 215. FIG. 12 also shows the inner shaft 220a arranged coaxially within the hollow shaft 220b. The inner shaft 220a is rotatably seated in a bearing 140 with an associated bearing support 141. The bearing supports 141 of the inner shaft 220a are preferably each arranged axially adjacent to the inner shaft drive ring gear 216 to reduce deformations on force-carrying components due to bending levers that are too long. A drive sprocket carrier shaft 214c connected to the gear output of the reduction gear unit 212 and carrying the drive sprockets 214b runs in drive sprocket carrier shaft bearings 214d. The drive sprocket carrier shaft bearings 214d are in turn held axially and radially in non-rotatable drive sprocket carrier shaft bearing carriers 214e. To absorb the tensile forces of the drive chain 215, the drive sprocket carrier shaft bearing supports 214e are also firmly connected to the adjacent bearing supports 141. There is a torque-transmitting operative connection between the inner shaft 220a and the respective hollow shaft 220b in that the inner shaft 220a has at least one, in this case two, longitudinal grooves 223, and the hollow shafts 220b have complementary, radially inner longitudinal struts 224. As a result of this form-fitting seat, the hollow shafts 220b can be moved axially on the inner shaft 220a, but cannot be rotated about it.
[0101] FIG. 13 shows a perspective view of the embodiment of a lifting device 10 according to FIG. 11 with two rotary blades 240 which are each configured to be pivotable and adjustable. Each rotary blade 240 includes a radially inner rotary blade arm 240a, a radially outer rotary blade arm 240b, and an intermediate rotary blade arm portion 240c. The designations radially inside or radially outside each refer to a radius the origin of which lies on the axis of rotation 221 of the drive shaft 220. The radially inner rotary blade arm 240a is firmly connected to the respective hollow shaft 220b; the radially outer rotary blade arm 240b has a pivotably articulated rotary blade support 270 with a traction pattern 280 at its radially outer end 242. Furthermore, the radially inner rotary blade arm 240a is connected to the rotary blade arm section 240c via a rotary joint 243. By means of a swivel motor 246, the radially inner rotary blade arm 240a and the rotary blade arm section 240c can be rotated relative to one another about the rotary joint 243. In the present illustration, the rotary blade 240 is shown retracted into a transport position parallel to the drive shaft 220. The rotary blade arm section 240c is also connected to the radially outer rotary blade arm 240b via two guide rails 244 and respective associated guide slides 245, as a result of which the rotary blades 240 can be aligned offset to one another in two additional spatial directions. In the transport position of the lifting device 10 shown, both rotary blades 240 are pivoted into a position running parallel to the drive shaft 220 and are arranged offset to one another with respect to the vehicle longitudinal direction y.
[0102] FIGS. 14a and 14b each show a perspective view of an embodiment in which the rotary blade 240 shown is adjustable in its radial length r (starting from the axis of rotation 221). The respective rotary blade 240 comprises a radially inner rotary blade arm 240a and a radially outer rotary blade arm 240b, which are radially displaceable relative to one another to adjust the radial length r of the rotary blade 240 as required. According to FIG. 14a, the rotary blade arms 240a, 240b are each provided with mutually facing and complementary corrugated profiles for manual adjustment, which allow a positive, mutual hooking of the rotary blade arms 240a, 240b in evenly spaced positions. Furthermore, the rotary blade arms 240a, 240b are penetrated by evenly spaced bores, through which bolts or screws can pass, for example, in order to fix the rotary blade arms 240a, 240b in the desired position. According to FIG. 14b, the radial length r of the rotary blade 240 can be adjusted by an actuator using a linear actuator 130. The radially outer rotary blade arm 240b additionally has a guide rail in which the radially inner rotary blade arm 240a can slide back and forth.
[0103] The design variants shown and/or described individually in the figures described above can be combined with one another in any meaningful way in order to adapt the lifting device 10 according to the invention to the respective application as required and/or desired.
LIST OF REFERENCE NUMERALS
[0104] 1 vehicle front axle
[0105] 2 vehicle rear axle
[0106] 3 vehicle wheel
[0107] 4 shock absorber spring
[0108] 5 spring plate
[0109] 10 lifting device
[0110] 100, 100a support structure
[0111] 110a inner guide rail
[0112] 110b outer guide rail
[0113] 120a inner guide rod
[0114] 120b outer guide rod
[0115] 121 first end of the guide rod
[0116] 122 second end of the guide rod
[0117] 130 linear actuator
[0118] 130a clamp
[0119] 131 first end section of the linear actuator
[0120] 132 second end section of the linear actuator
[0121] 133 connecting rod
[0122] 134 linear actuator guide rail
[0123] 135 spacer connecting rod
[0124] 136 spacer
[0125] 140 bearing
[0126] 141 bearing support
[0127] 150 seals
[0128] 200 rotary blade drive
[0129] 210 drive carrier
[0130] 211 drive motor
[0131] 212 reduction gear
[0132] 213 angular gear
[0133] 214 torque amplifier unit
[0134] 214a motor gear chain
[0135] 214b drive sprockets
[0136] 214c drive sprocket carrier shaft
[0137] 214d drive sprocket carrier shaft bearing
[0138] 214e drive sprocket carrier shaft bearing support
[0139] 215 drive chain
[0140] 216 inner shaft drive sprockets
[0141] 220 drive shaft
[0142] 220a inner shaft
[0143] 220b hollow shaft
[0144] 220c sliding disk
[0145] 221 axis of rotation
[0146] 222 drive shaft gear
[0147] 223 longitudinal groove
[0148] 224 longitudinal strut
[0149] 240 rotary blade
[0150] 240a radially inner rotary blade arm
[0151] 240b radially outer rotary blade arm
[0152] 240c rotary blade arm section
[0153] 241 radially inner end, connecting section
[0154] 242 radially outer end, support edge
[0155] 243 swivel joint
[0156] 244 guide rail
[0157] 245 guide slide
[0158] 246 swivel motor
[0159] 250 transverse wheel
[0160] 251 transverse wheel drive
[0161] 260 stabilization device
[0162] 261 stabilization carrier
[0163] 262 stabilization rod
[0164] 270 rotary blade support
[0165] 271 joint
[0166] 280 traction pattern
[0167] 300 spring lock
[0168] 310 toothed rack carrier
[0169] 311 toothed rack
[0170] 320 motor support
[0171] 321 servomotor
[0172] 322 servomotor gear
[0173] 400 support device
[0174] 410 support carrier arm
[0175] 411 first end portion of the support carrier arm
[0176] 412 second end portion of the support carrier arm
[0177] 420 support foot
[0178] 421 fastening axis
[0179] 422 support foot upper part
[0180] 423 support foot base
[0181] 424 retaining bolt
[0182] 430 support foot pivoting gear
[0183] 431 tooth elements
[0184] 440 pivot drive motor
[0185] 450 swivel arm
[0186] M torque
[0187] y vehicle longitudinal direction
[0188] x vehicle transverse direction
[0189] r radial length of the rotary blade
[0190] αangle
