DRIVE ARRANGEMENT WITH A SHAFT, A CABLE DRUM, A HOLDING MEANS, A GEAR MOTOR AND A GRAB BASKET

Description

[0001] The invention relates to a drive arrangement with a shaft, a cable drum, a holding means and a gear motor.

[0002] It is generally known that a drive arrangement is designed with a shaft, a cable drum, a holding means and a gear motor.

[0003] From the US 5 167 401 A The closest state of the art is a rope drum.

[0004] From the DE 305 499 A a grab excavator is known.

[0005] From the DE 11 87 776 A A device for determining the opening state of a gripper is known.

[0006] From the DE 10 2015 112 639 A1 A shell grab is known.

[0007] From the WO 2019 / 232 937 A1 a grab basket is known.

[0008] From the DE 199 03 227 A1 A cable hoist with overload protection is known.

[0009] From the US 2016 / 0 031 686 A1 A direct drive with a bearingless motor is known.

[0010] From the DE 40 34 006 A1 A method for operating a crane with a grab is known.

[0011] From the US 6 653 804 B1 A method for controlling a crane basket is known.

[0012] The invention is therefore based on the object of developing a drive arrangement with a shaft, a cable drum, a holding means, a gear motor and a gripping basket with increased safety and / or service life.

[0013] According to the invention, the object is achieved in the drive arrangement with a shaft, a cable drum, a holding means and a geared motor according to the features specified in claim 1.

[0014] Important features of the invention in the drive arrangement with a shaft, a cable drum, a holding means, a geared motor and a gripping basket are that the geared motor has a gear driven by an electric motor of the geared motor, the output shaft of which, in particular the output shaft, is designed as a hollow shaft, wherein bearings are accommodated in a housing part of the gear unit (21) for rotatably supporting the output shaft, wherein the shaft is rotatably mounted by means of bearings accommodated in the holding means, in particular relative to the holding means, wherein the cable drum is connected to the shaft in a rotationally fixed manner, wherein two cables, in particular spaced apart from one another in the axial direction, are at least partially wound on the cable drum, wherein the first cable is fastened by its end region to a first basket part of the grab basket, wherein the second cable is fastened by its end region to a second basket part of the grab basket, the basket parts are arranged so as to be rotatable about a common axis of rotation, wherein each basket part is connected via a respective pivot bearing to a rod which is connected to the holding means, in particular is connected with play, in particular wherein the pivot bearings are spaced apart from one another and from the two end regions,wherein the electric motor is powered by an inverter, in particular wherein the inverter is comprised of a mains-powered converter, wherein a sensor for detecting the angular position of the rotor shaft of the electric motor is arranged on the electric motor, wherein the inverter has signal electronics which have a memory, wherein the sensor is connected to the signal electronics, wherein the signal electronics has a comparison means which is designed to compare a first angular value read from the memory and assigned to a first position of the common axis of rotation with the angular value detected by the sensor and to switch off the electric motor depending on the result of the comparison, in particular so that when the grab basket is closed, the winding of the respective cable onto the cable drum is terminated when the first angular value is reached, and / or wherein the signal electronics has a comparison means,which is designed to compare a first angle value read from the memory and assigned to a second position of the common axis of rotation with the angle value detected by the sensor and to switch off the electric motor depending on the result of the comparison, in particular so that when the grab basket is opened, the unwinding of the respective rope from the rope drum is terminated when the second angle value is reached.

[0015] The advantage of this is that the rope is not overloaded, thus increasing safety and service life. As soon as a stored angle value is reached, the motor is shut off. The angle value refers to the absolute angular position, so even after several complete revolutions of the rope drum, a unique angular position is determined by the sensor and then compared with the value stored in the memory.

[0016] In an advantageous embodiment, a first limit switch, electrically connected to the signal electronics, is attached to the holding means, in particular, it is attached in such a way as to detect a first of the rods or a part firmly connected to the first rod, in particular so that, depending on the result of the detection, the electric motor is switched off. This has the advantage that the cable is not overloaded, thus increasing safety and service life.

[0017] In an advantageous embodiment, a second limit switch, electrically connected to the signal electronics, is attached to the holding means, in particular, mounted in such a way as to detect a second rod or a part firmly connected to the second rod, in particular such that the electric motor is switched off depending on the detection result. This is advantageous in that the cable is not overloaded, thus increasing safety and service life.

[0018] In an advantageous embodiment, the inverter has a current sensor for detecting the motor current of the electric motor, in particular for detecting the amount of current supplied by the inverter to the electric motor. The current sensor is connected to a monitoring means of the signal electronics, which is suitable for monitoring the detected current value for exceeding a threshold value, in particular to cause the motor to shut down in the event of an overload, in particular to activate a brake connected to the motor. The advantage here is that the cable is not overloaded, thus increasing safety and service life.

[0019] In an advantageous embodiment, a first roller holder is attached to the holding means, on which two rollers are accommodated and rotatably mounted, wherein the rollers are spaced apart from one another and aligned coaxially with one another, wherein the axis of rotation of the rollers is aligned parallel to the axis of rotation of the cable drum, wherein, in particular to prevent multi-layer winding of the cable drum, the minimum distance between the cable drum and the respective roller is less than twice the cable diameter, in particular the diameter of the cable, and / or is greater than the cable diameter or is equal to the cable diameter.

[0020] The advantage here is that the winding of the ropes is controlled, thus reducing wear and tear on the ropes and the risk of cracks. This increases service life. Furthermore, the drive arrangement according to the invention can be designed to be compact and robust.

[0021] In an advantageous embodiment, the area covered by the cable drum in the axial direction encompasses the area covered by the two rollers in the axial direction. This is advantageous in that both rollers cover the winding area of ​​the two cables on the cable drum. In particular, each cable winding can be contacted by one of the two rollers along the entire winding area. This prevents a radial migration of a cable winding.

[0022] In an advantageous embodiment, the first of the rollers touches a first rope above the point at which the first rope begins to touch the rope drum, wherein, relative to the rotational axis of the cable drum, the first roller has a circumferential angular distance value of between 10° and 50° to this point and / or to the horizontal plane, in particular wherein the first cable runs substantially vertically from the cable drum, in particular from the point, to a first basket part, in particular wherein the first cable is fastened with its end region to the first basket part, and / or the second of the rollers touches a second cable above the point at which the second cable begins to touch the cable drum, wherein, relative to the rotational axis of the cable drum, the second roller 33 has a circumferential angular distance value of between 10° and 50° to this point and / or to the horizontal plane,

[0023] in particular wherein the second rope runs essentially vertically from the rope drum, in particular from the point, to a second basket part, in particular wherein the second rope is fastened by its end region to the second basket part. The advantage here is that multi-layered, uncontrolled and / or disorderly winding of the rope can be prevented. This also reduces wear and tear on the ropes. The basket parts of a grab basket can be actuated with the two ropes, so that the grab basket formed from the two basket parts can be opened or closed. The two ropes are wound up synchronously so that the two basket parts can also be operated synchronously and the grab basket therefore closes or opens as symmetrically as possible. For this purpose, winding or unwinding the two ropes on the same rope drum is advantageous.

[0024] In an advantageous embodiment, a second roller holder is attached to the holding means, on which a third roller is accommodated and rotatably mounted, wherein the third roller is spaced from the other two rollers in the circumferential direction. wherein the axis of rotation of the third roller is aligned parallel to the axis of rotation of the cable drum, wherein, in particular to prevent multi-layer winding of the cable drum, the minimum distance between the cable drum and the third roller is less than twice the cable diameter, in particular the diameter of the cable, and / or is greater than the cable diameter or equal to the cable diameter, in particular wherein the area covered by the cable drum in the axial direction comprises the area covered by the third roller in the axial direction. The advantage here is that the security against losing the cable or against uncontrolled, disorderly winding of the cable is reduced.

[0025] In an advantageous embodiment, a torque support, in particular a torque support part, is connected to the holding means, in particular by means of screws, wherein at least one screw passing through a recess of the torque support is screwed into a threaded bore of the housing part of the gearbox or into a threaded bore of a part lying against the housing part of the gearbox, in particular a part positively connected to the housing part in the direction of the axis of rotation of the shaft, wherein the screw presses a first damping ring onto the torque support with its screw head and thus the torque support presses a second damping ring towards the housing part of the gearbox.

[0026] The advantage here is that shock loads, which are transmitted via the rods to the holding device, can be dampened by the gear motor. This makes the drive assembly robust. Furthermore, the cable drum is directly connected to the output shaft of the gearbox via the shaft. An adapter or coupling is not required. This results in a compact solution.

[0027] In an advantageous embodiment, the gearbox is designed as a parallel-shaft gearbox, and the rotor shaft of the electric motor is aligned parallel to the shaft. This allows for cost-effective production.

[0028] In an advantageous embodiment, the clear inner diameter of the recess is larger than the maximum outer diameter of the area of ​​the screw that axially covers the same area that the recess axially covers. It is advantageous in this case that the screw is spaced apart from the torque support.

[0029] In an advantageous embodiment, the damping rings are made of a material that is softer and / or has greater elasticity and / or is more easily deformable than the material from which the torque arm and / or the housing part are made. This is advantageous because high damping can be achieved.

[0030] In an advantageous design, the damping rings are made of plastic and / or rubber. This is advantageous because it allows for damping of shock loads.

[0031] In an advantageous embodiment, the torque support is designed as an L-shaped bent steel part, with a first leg of the L extending parallel to the shaft's axis of rotation and the other leg extending perpendicular to the shaft's axis of rotation. This allows for the simple production of a robust component.

[0032] In an advantageous embodiment, each damping ring is constructed in multiple pieces. This provides the advantage of improved damping.

[0033] In an advantageous embodiment, each damping ring is designed as a stack of rings, each made of a different material. This provides improved damping of shock waves and thus protects the geared motor.

[0034] In an advantageous embodiment, the shaft is partially inserted into the hollow shaft and connected in a rotationally fixed manner, particularly by means of a keyway. This allows for a compact yet robust design in a simple manner.

[0035] In an advantageous embodiment, ropes can be wound on the rope drum, with each rope connected to a respective basket section of a grab basket. This is advantageous because a simple, robust drive solution for the grab basket is achievable.

[0036] In an advantageous embodiment, the basket parts are mounted so as to be rotatable about a common axis of rotation, with each basket part being connected via a respective pivot bearing to a rod, which is connected to the holding means, in particular with a certain amount of play. This is advantageous in that simple, cost-effective production is enabled.

[0037] In an advantageous embodiment, a roller mount for rotatably supporting and holding a damping roller is attached to the holding means, with the electric motor, in particular its housing, resting against the roller mount. This is advantageous in that effective damping can be achieved because the motor, in particular its housing, is only loosely attached, making it difficult for shock waves to propagate to the motor.

[0038] Further advantages emerge from the dependent claims. The invention is not limited to the combination of features in the claims. Further possible combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent to those skilled in the art, particularly from the problem and / or the problem posed by comparison with the prior art.

[0039] The invention will now be explained in more detail using schematic illustrations: In the Figure 1 A grab basket drive, in particular a bucket drive, is schematically sketched. In the Figure 2 a drive area of ​​the drive according to the invention, comprising a gear motor, is shown in an oblique view. In the Figure 3 the drive range without gear motor is shown.

[0040] As shown in the figures, the grab basket has two basket parts, in particular scoops, that can be moved relative to each other. The two basket parts are arranged to rotate around a common axis of rotation. Figure 1 The rotation axis is schematically indicated in a first position 1 and in a second position 2. Depending on the rotational position of the basket parts around the rotation axis, the position of the rotation axis is shifted, since each basket part is connected via a pivot joint to a rod 5, which is connected with only slight play to a holding means 23 of a cable winch drive 3.

[0041] A shaft 31 is rotatably mounted on the holding means 23, onto which a cable drum of the cable winch drive 3, driven by a gear motor (20, 21) of the cable winch drive 3, is mounted and connected in a rotationally fixed manner. The cable drum is driven by an output shaft of a gear 21 of the gear motor, designed as a hollow shaft 22. The hollow shaft 22 is mounted on the axially projecting shaft 31 and connected in a rotationally fixed manner.

[0042] The transmission 21 is driven by an electric motor 20.

[0043] Two ropes 4 can be wound on the rope drum, each of the ropes 4 being connected to a respective basket part 6, so that by winding or unwinding the ropes 4 on the rope drum, the respective basket part can be pivoted.

[0044] A torque support 24, through which the reaction torque of the geared motor can be dissipated, is connected to the holding means 23. To connect the torque support 24, screws 25 are screwed into threaded holes in the housing part of the gearbox or a sheet metal part adjacent to the housing part of the gearbox.

[0045] The screws 25 protrude through the torque support 24, with damping rings 32 being attached to both sides of the torque support, through which the screws 25 also protrude.

[0046] Thus, the screw head of the respective screw 25 rests against a first of the damping rings 32, which rests against the torque arm 24, which is pressed toward the housing part of the gearbox via a respective second damping ring 32. The screws 25 protrude through a recess in the torque arm, wherein the recess has a larger inner diameter than the outer diameter of the screw 25. Thus, there is preferably sufficient play between the respective screw 25 and the torque arm 24 so that the gear motor is only slightly stressed in the event of shock loads on the basket parts 6.

[0047] Although shock loads acting on the ropes 4 are transmitted to the hollow shaft 22 via the rope drum and the shaft 31, shock loads introduced via the rods 5 are only transmitted to the gearbox via the holding means 23 and the torque support 24 and the intermediate damping rings 32.

[0048] The damping rings 32 are made of a softer material than the torque arm 24, which is preferably made of steel, and the gearbox housing, which is preferably made of steel. Plastic and / or rubber are suitable materials for the damping rings 32.

[0049] The electric motor 20, in particular the housing of the electric motor 20, preferably rests on a roller holder 35 so that the gear motor is protected from impacts.

[0050] The torque support 24 is designed as an L-shaped bent steel part, with a first leg of the L extending parallel to the axis of rotation of the shaft and the other leg extending perpendicular to the axis of rotation of the shaft.

[0051] The roller holder 35 is attached to the holding means 23 and rotatably supports two coaxially aligned rollers 33. The two rollers 33 are axially spaced from one another. The rotational axes of the rollers 33 are aligned parallel to the rotational axis of the cable drum 30. The minimum distance between the cable drum 30 and the respective roller 33 equals the diameter of the cable 4. Thus, the respective cable 4 can only be wound in one layer on the cable drum 30. When winding or unwinding the respective cable 4, the roller 33 guides the respective cable 4. The roller 33 thus functions as a loss protection device.

[0052] The rollers 33 contact the respective cable 4 above the point at which the cable 4 begins to contact the cable drum 30. Relative to the rotational axis of the cable drum 30, the roller 33 has a circumferential angular distance value of between 10° and 50° from this point and / or from the horizontal plane. The cable 4 runs essentially vertically from the cable drum 30, in particular from this point, to the respective cage part 6.

[0053] The area covered by the cable drum 30 in the axial direction comprises the area covered by the two rollers 33 in the axial direction.

[0054] A third roller 34 is also rotatably mounted on a further holder connected to the holding means 23, wherein the axis of rotation of this third roller 34 is also aligned parallel to the axis of rotation of the cable drum 30.

[0055] The area covered in the axial direction by the cable drum also includes the area covered in the axial direction by the third pulley 34. The minimum distance between the cable drum 30 and the third pulley 34 also equals the diameter of the cable 4. This provides additional security for the cable 4. This is because the third pulley 34 also only releases a single-layer winding of the cable drum 30 with the cable 4, thus preventing a two-layer or multi-layer winding.

[0056] The area covered in the axial direction by the third pulley 34 encompasses the area covered in the axial direction by the first and second pulleys 33. Thus, only a single third pulley 34 is required to ensure the winding of both ropes 4. The third pulley 34 is spaced from the first pulley 33 at an angular distance of between 70° and 90° relative to the rotational axis of the rope drum 30, counter to the circumferential direction.

[0057] Thus, the third roller 34 is arranged below, i.e. in the direction of gravity below, the first roller 33.

[0058] The roller holder 35 has an axle firmly connected to the holding means 23, on which the hollow cylindrical rollers 33 are rotatably mounted by means of a rolling bearing, in particular a needle bearing, or by means of a plain bearing. The axle is connected centrally to the hardening means 23, so that the two rollers 33 can be arranged symmetrically to this central connection point.

[0059] In contrast, the further roller holder for the third roller 34 is designed in two parts, so that both ends of the third roller 34 are each mounted via a rolling bearing, in particular needle bearing, or by means of a plain bearing and each of the two parts of the roller holder is firmly connected to the holding means 23.

[0060] The electric motor 20 has a sensor for detecting the angular position of the rotor of the electric motor 20. The sensor is designed as a multi-turn encoder. The sensor therefore also detects the revolutions in addition to the rotation angle values ​​of the rotor shaft of the electric motor when winding the cable 4 onto the cable drum 30. The sensor signal is fed to an inverter that powers the electric motor.

[0061] A first angle value assigned to the first position 1 and a second angle value assigned to the second position 2 are stored in a memory included in the inverter.

[0062] When the grab basket is closed, the winding of the rope 4 onto the rope drum 30 is stopped when the first angle value is reached.

[0063] When the grab basket is opened, the unwinding of the rope 4 from the rope drum 30 is stopped when the second angle value is reached.

[0064] This prevents overloads. Furthermore, a current sensor in the inverter continuously monitors the motor current, i.e., the amount of current supplied to the electric motor, for any threshold values ​​exceeded. This allows the motor to be shut down in the event of an overload, particularly to activate a brake connected to the motor.

[0065] In further embodiments of the invention, limit switches are additionally attached to the holding means 23, which detect when the rods 5 have reached the rotational position corresponding to the first position 1 or second position 2. This also allows the motor to be shut off, thus increasing safety. The limit switches do not have to detect the rod directly, but may also detect a part firmly connected to the rod. The limit switches are protected in a housing connected to the holding means 23.

[0066] In further embodiments according to the invention, the minimum distance chosen is not the rope diameter, but a larger value that is less than twice the rope diameter. This allows some play for the rope, but still prevents two- or multi-layer winding.

[0067] In further embodiments of the invention, each damping ring is constructed in multiple pieces. Thus, each damping ring can be constructed from a stack of rings, each made of a different material. This allows for further improved damping. List of reference symbols

[0068] 1 first position 2 second position 3 cable winch drive 4 cable 5 rod 6 basket part, in particular shovel 20 electric motor 21 gear 22 hollow shaft, in particular output shaft 23 holding means 24 torque support 25 screws 30 cable drum 31 shaft 32 damping ring 33 first or second pulley 34 third pulley 35 pulley holder

Claims

1. A drive arrangement having a shaft (31), a cable drum (30), a holding means (23), a geared motor and a grab bucket, wherein the geared motor has a gear unit (21), driven by an electric motor (20) of the geared motor, having an output shaft, in particular driven shaft, wherein in a housing part of the gear unit (21) there are received bearings for the rotatable mounting of the output shaft, wherein the shaft (31) is rotatably mounted, in particular relative to the holding means (23), by means of bearings received in the holding means (23), wherein the cable drum (30) is connected to the shaft (31) in a rotationally-fixed manner, wherein two cables (4), in particular spaced apart from one another in an axial direction, are at least partially wound on the cable drum (30), wherein the first cable (4) is secured by means of its end region to a first bucket part (6) of the grab bucket, wherein the second cable (4) is secured by means of its end region to a second bucket part (6) of the grab bucket, wherein the electric motor (20) is supplied by an inverter, in particular wherein the inverter is encompassed by a mains-powered converter, characterised in that the output shaft of the gear unit (21) is in the form of a hollow shaft (22), the bucket parts (6) are arranged rotatably mounted about a common rotational axis, wherein each bucket part (6) is connected to a bar (5) via a respective pivot bearing, which bar is connected to the holding means (23), in particular is connected with play, in particular wherein the pivot bearings are spaced apart from one another and from the two end regions, wherein a sensor for detecting the angular position of the rotor shaft of the electric motor (20) is arranged at the electric motor (20), wherein the inverter has signal electronics which have a memory, wherein the sensor is connected to the signal electronics, - wherein the signal electronics have a comparison means appropriately designed to compare a first angle value, retrieved from the memory and associated with a first position (1) of the common rotational axis, with the angle value detected by the sensor and to switch off the electric motor (20) dependent on the result of the comparison, in particular so that upon closing of the grab bucket, the winding of the respective cable (4) onto the cable drum (30) is ended when the first angle value is reached, - and / or wherein the signal electronics have a comparison means appropriately designed to compare a first angle value, retrieved from the memory and associated with a second position (2) of the common rotational axis, with the angle value detected by the sensor and to switch off the electric motor (20) dependent on the result of the comparison, in particular so that upon opening of the grab bucket, the unwinding of the respective cable (4) from the cable drum (30) is ended when the second angle value is reached.

2. A drive arrangement according to claim 1, characterised in that a first limit switch electrically connected to the signal electronics is secured to the holding means (23), in particular is secured in an appropriate manner to detect a first of the bars (5) or a part securely connected to the first bar (5), in particular so that switching off of the electric motor (20) is brought about dependent on the result of the detection, and / or in that a second limit switch electrically connected to the signal electronics is secured to the holding means (23), in particular is secured in an appropriate manner to detect a second bar (5) or a part securely connected to the second bar (5), in particular so that switching off of the electric motor (20) is brought about dependent on the result of the detection.

3. A drive arrangement according to any one of the preceding claims, characterised in that the inverter has a current sensor for detection of the motor current of the electric motor (20), in particular therefore for detection of the amount of the current supplied to the electric motor (20) from the inverter, and wherein the current sensor is connected to a monitoring means of the signal electronics, which is able to monitor the exceeding of a threshold value by the detected current value, in particular in order to bring about a switching off of the motor in the event of an overload, in particular and to activate a brake connected to the motor.

4. A drive arrangement according to any one of the preceding claims, characterised in that secured to the holding means (23) there is a first roller holding means on which two rollers (33) are received and rotatably mounted, wherein the rollers (33) are at a distance from one another and oriented coaxially with one another, wherein the rotational axis of the rollers (33) is oriented parallel to the rotational axis of the cable drum (30), wherein, in particular to prevent a multi-layer winding of the cable drum (30), the minimum distance between the cable drum (30) and the respective roller (33) is smaller than double the cable diameter, in particular double the diameter of the cable (4), and / or is greater than the cable diameter or is equal to the cable diameter.

5. A drive arrangement according to claim 4, characterised in that the region covered in an axial direction by the cable drum (30) comprises the region covered in an axial direction by the two rollers (33).

6. A drive arrangement according to one of claims 4 to 5, characterised in that the first of the rollers (33) contacts a first cable (4) above that site at which the first cable (4) begins to contact the cable drum (30), wherein related to the rotational axis of the cable drum (30), the first roller (33) has a circumferential angle distance value between 10° and 50° with respect to this site and / or with respect to the horizontal plane, in particular wherein the first cable (4) runs substantially vertically from the cable drum (30), in particular from the site, to a first bucket part (6), in particular wherein the end region of the first cable (4) is secured to the first bucket part (6), and / or in that the second of the rollers (33) contacts a second cable (4) above that site at which the second cable (4) begins to contact the cable drum (30), wherein related to the rotational axis of the cable drum (30), the second roller (33) has a circumferential angle distance value between 10° and 50° with respect to this site and / or with respect to the horizontal plane, in particular wherein the second cable (4) runs substantially vertically from the cable drum (30), in particular from the site, to a second bucket part (6), in particular wherein the end region of the second cable (4) is secured to the second bucket part (6).

7. A drive arrangement according to any one of claims 4 to 6, characterised in that secured to the holding means (23) there is a second roller holding means on which a third roller (34) is received and rotatably mounted, wherein the third roller is at a distance from the two other rollers (33) in a circumferential direction, wherein the rotational axis of the third roller (34) is oriented parallel to the rotational axis of the cable drum (30), wherein, in particular to prevent a multi-layer winding of the cable drum (30), the minimum distance between the cable drum (30) and the third roller (34) is smaller than double the cable diameter, in particular double the diameter of the cable (4), and / or is greater than the cable diameter or equal to the cable diameter, in particular wherein the region covered in an axial direction by the cable drum (30) comprises the region covered in an axial direction by the third roller (34).

8. A drive arrangement according to any one of the preceding claims, characterised in that a torque support (24), in particular a torque support part, is connected to the holding means (23), in particular by means of screws (25), wherein at least one screw passing through a cutout of the torque support (24) is screwed into - a tapped bore of the housing part of the gear unit (21) or - a tapped bore of a part resting against the housing part of the gear unit (21), in particular a part connected in a form-locked manner to the housing part in the direction of the rotational axis of the shaft (31), wherein the screw presses a first damping ring (32) onto the torque support (24) by means of its screw head and consequently the torque support (24) presses a second damping ring (32) towards the housing part of the gear unit (21).

9. A drive arrangement according to any one of the preceding claims, characterised in that the gear unit (21) is in the form of a parallel shaft gear unit and the rotor shaft of the electric motor (20) is oriented parallel to the shaft (31).

10. A drive arrangement according to claim 8, characterised in that the clear inner diameter of the cutout in the torque support (24) is greater than the maximum outer diameter of that region of the screw which in an axial direction covers the same region which the cutout also covers in an axial direction.

11. A drive arrangement according to claim 8 or 10, characterised in that the damping rings (32) are manufactured of a material which has a greater elasticity than the material from which the torque support (24) is manufactured and / or from which the housing part is manufactured.

12. A drive arrangement according to any one of claims 8, 10 or 11, characterised in that the damping rings (32) are manufactured of plastics material and / or rubber.

13. A drive arrangement according to any one of claims 8 or 10 to 12, characterised in that the torque support (24) is in the form of a steel part bent in an L shape, wherein a first limb of the L extends parallel to the rotational axis of the shaft (31) and the other limb extends perpendicular to the rotational axis of the shaft (31).

14. A drive arrangement according to any one of claims 8 or 10 to 13, characterised in that each damping ring (32) is multi-part.

15. A drive arrangement according to any one of claims 8 or 10 to 14, characterised in that each damping ring (32) is in the form of a stack of rings which in each case are manufactured of a differing material.

16. A drive arrangement according to any one of the preceding claims, characterised in that the shaft (31) is partially inserted into the hollow shaft (22) and connected in a rotationally-fixed manner, in particular by means of a fit-type connection.

17. A drive arrangement according to any one of claims 1 to 3 or 8-16, characterised in that secured to the holding means (23) there is a roller holding means for rotatable mounting and holding of a roller (33), wherein the minimum distance between the roller (33) and the cable drum (30) is equal to the diameter of the cable (4), in particular of the cable (4) wound on the cable drum (30), in particular such that the cable (4) can only be wound on the cable drum (30) in a single layer, and / or in that the electric motor (20), in particular by means of its housing, rests against the roller holding means.