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

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] DE 199 03 227 C2 discloses a cable pull with overload protection as the closest prior art. This document discloses the preamble of claim 1.

[0004] A direct drive with a bearingless motor is known from US 2016 / 0 031 686 A1.

[0005] A stationary lifting mechanism with damper is known from DE 10 2014 205250 A1.

[0006] A cable drive is known from US 9 527 702 B2.

[0007] The invention is therefore based on the object of developing a drive arrangement with a shaft, a cable drum, a holding means and a gear motor in a compact and robust manner.

[0008] 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.

[0009] Important features of the invention in the drive arrangement with a shaft, a cable drum, a holding means and a geared motor 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 gearbox for the rotatable mounting of 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 a torque arm, 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 arm is screwed into a threaded bore in the housing part of the gearbox or into a threaded bore of a part lying against the housing part of the gearbox, in particular 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 arm with its screw head and the torque arm thus presses a second damping ring towards the housing part of the gearbox.

[0010] 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.

[0011] 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.

[0012] 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 covers the same area in the axial direction as the recess. It is advantageous that the screw is spaced apart from the torque support.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] In an advantageous embodiment, each damping ring is constructed in multiple pieces. This provides the advantage of improved damping.

[0017] 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.

[0018] 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.

[0019] In an advantageous embodiment, ropes can be wound on the rope drum, wherein a respective rope is connected to a respective basket part of a grab basket. This is advantageous because a simple, robust drive solution for the grab basket is achievable. 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 connected with play. This is advantageous because simple, cost-effective production is possible.

[0020] In an advantageous embodiment, a damping roller is attached to the holding means, against which the electric motor, in particular its housing, rests. This is advantageous in that effective damping can be achieved, since the motor, in particular its housing, is only loosely attached, making it difficult for shock waves to propagate to the motor.

[0021] Further advantages arise from the subclaims.

[0022] 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 is shown without gear motor.

[0023] 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.

[0024] 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.

[0025] The transmission 21 is driven by an electric motor 20.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The electric motor 20, in particular the housing of the electric motor 20, preferably rests against damping rollers 33 so that the gear motor is protected from shocks.

[0033] 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.

[0034] 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

[0035] 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 damping roller

Claims

1. Drive assembly, comprising a shaft (31), a cable drum (30), a holding means (23) and a gear motor, wherein the gear motor has a gearbox (21) which is driven by an electric motor (20) of the gear motor and the output shaft (31) of which is designed as a hollow shaft (22), wherein bearings are accommodated in a housing part of the gearbox (21) in order to rotatably support the output shaft, wherein the shaft (31) is mounted in a rotatable manner, in particular relative to the holding means (23), by means of bearings accommodated in the holding means (23), wherein the cable drum (30) is connected to the shaft (31) in such a way as to rotate therewith, wherein a torque support (24), in particular a torque support part, is connected to the holding means (23), in particular by means of screws (25), characterized in that at least one screw passing through a cutout of the torque support (24) is screwed - into a threaded bore in the housing part of the gearbox (21), or - into a threaded bore in a part bearing against the housing part of the gearbox (21), in particular a part form-fittingly connected to the housing part in the direction of the axis of rotation of the shaft (31), wherein the screw, with its screw head, presses a first damping ring (32) onto the torque support (24), and thus the torque support (24) presses a second damping ring (32) toward the housing part of the gearbox (21).

2. Drive assembly according to claim 1, characterized in that the gearbox (21) is designed as a parallel shaft gearbox, and the rotor shaft of the electric motor (20) is oriented parallel to the shaft (31).

3. Drive assembly according to any one of the preceding claims, characterized in that the clear internal diameter of the cutout is larger than the maximum external diameter of the region of the screw that covers the same area in the axial direction as the cutout also covers in the axial direction.

4. Drive assembly according to any one of the preceding claims, characterized in that the damping rings (32) are made of a material that has a higher elasticity than the material from which the torque support (24) is made and / or from which the housing part is made.

5. Drive assembly according to any one of the preceding claims, characterized in that the damping rings (32) are made of plastic and / or rubber.

6. Drive assembly according to any one of the preceding claims, characterized in that the torque support (24) is designed as an L-shaped bent steel part, wherein a first leg of the L extends parallel to the axis of rotation of the shaft (31) and the other leg extends perpendicular to the axis of rotation of the shaft (31).

7. Drive assembly according to any one of the preceding claims, characterized in that each damping ring (32) is formed of multiple parts.

8. Drive assembly according to any one of the preceding claims, characterized in that each damping ring (32) is formed as a stack of rings, which are each made of a different material.

9. Drive assembly according to any one of the preceding claims, characterized in that the shaft (31) is partially inserted into the hollow shaft (22) and is connected thereto in such a way as to rotate therewith, in particular by means of a keyed connection.

10. Drive assembly according to any one of the preceding claims, characterized in that cables (4) can be wound onto the cable drum (30), wherein a respective cable (4) is connected to a respective bucket part (6) of a grab bucket.

11. Drive assembly according to any one of the preceding claims, characterized in that the bucket parts (6) are mounted in such a way as to be rotatable about a common axis of rotation, wherein each bucket part (6) is connected via a respective swivel bearing to a rod (5), which is connected, in particular connected with play, to the holding means (23).

12. Drive assembly according to any one of the preceding claims, characterized in that a damping roller (33) is attached to the holding means (23), against which damping roller the electric motor (20) bears, in particular with its housing.

13. Drive assembly according to any one of the preceding claims, characterized in that cables (4) can be wound onto the cable drum (30), wherein a respective cable (4) is connected to a respective bucket part (6) of a grab bucket, wherein the bucket parts (6) are mounted in such a way as to be rotatable about a common axis of rotation, wherein each bucket part (6) is connected via a respective swivel bearing to a rod (5), which is connected, in particular connected with play, to the holding means (23).