Lifting device

Abstract

The present invention relates to a lifting device (1) having a load sprocket (6) and a drive shaft (4) that drives the load sprocket (6) via a transmission mechanism (5). The lifting device (1) is driven by a motor, particularly an electric motor (10). The motor shaft (11) and the drive shaft (4) are coupled by a brake-clutch system (12). The brake-clutch system (12) includes a clutch portion (13) that can be coupled to the motor shaft (11) and a brake hub (15) rotatably arranged on a brake thread (14) of the drive shaft (4). The clutch portion (13) has a driving portion (20). The brake hub (15) has a pin (21) that protrudes axially toward the clutch portion (13). A vane disk (22) having vane bodies (23) is arranged between the clutch portion (13) and the brake hub (15). The vane disk (22) is torsionally fixed to the coupling section (24) of the drive shaft (4). The pressure disc (28) is torsionally fixed to the drive shaft (4) on the transmission side of the brake drum (15). Two friction discs (33, 34) and a brake disc (35) are arranged between the brake drum (15) and the pressure disc (28). The brake disc (35) is torsionally supported in the housing (3).

Description

Technical Field

[0001] This invention relates to a lifting device. Background Technology

[0002] Lifting devices are generally used as support or traction mechanisms for round steel chains and for lifting, lowering, and pulling loads. This invention relates to a motor-driven lifting device, wherein an electric motor, particularly a battery-powered electric motor, is preferably used as the drive unit. Compressed air motors or hydraulic motors can also be used as the drive unit.

[0003] The lifting device has a support hook as an upper fixing element and a load hook as a lower stop element. The upper fixing element and the lower stop element are indirectly connected to each other through a housing. The stop element is connected to a traction mechanism transmission device located in the housing of the lifting device via a load chain, which serves as a traction mechanism. In an electric lifting device, the traction mechanism transmission device is rotated by an electric motor. For this purpose, the electric motor works with the drive shaft of the lifting device, which drives the load sprocket through a transmission mechanism.

[0004] According to DE 33 30 539 C2, the prior art includes an electric lifting device. An electric lifting device is also known from DE 10 2006 001154 B4.

[0005] DE 199 27 847 C1 discloses a load-safe braking clutch system for force-driven lifting devices, particularly for electric chain mechanisms. It includes a drive clutch for connecting the motor shaft at one end to a slip clutch implemented as a double-disc clutch. A clutch drive disc is integrated between the two clutch discs.

[0006] Prior art, as per DE 199 59 999 C2 and US 3 090 601 A, also includes lifting devices with load pressure brakes. Load pressure brakes in conventional forms are well known. Typically, load pressure brakes work in conjunction with locking mechanisms during lifting. Such load pressure brakes are not suitable for high speeds. Furthermore, heat dissipation from the friction process within the load pressure brake is also insufficient.

[0007] A winch is known from US 5,482,255 A, in which braking is achieved by a cam actuator. To brake or remain stationary, the cam actuator frictionally locks the drive shaft. A reduction gear is disposed between the drive shaft and the rope drum. A braking mechanism is used to lock the drive shaft onto the rope drum, thereby stopping or braking the rotational movement of the shaft and the winch. The brake or braking mechanism is located in the rope drum and also outputs through the rope drum. This braking is directed towards the stationary drive shaft.

[0008] In terms of effect, the braking devices of the winches disclosed in CN 201 619 981 U and CN 200 981 801 Y are similar.

[0009] A winch with axially oriented braking is known from US 2019 / 0002254 A1. It is a mechanically acting brake with a locking hook.

[0010] US 2016 / 0311668 A1 discloses a torque-limiting and tapered braking assembly for a motor winch.

[0011] Technical background also includes DE 10 2017 108 694 A1, US 2017 / 0240395 A1 and CN 206 553130 U. Summary of the Invention

[0012] Based on existing technology, the purpose of this invention is to provide a lifting device with improvements in operation and safety technology, particularly a motor-driven lifting device with an improved braking and clutch system.

[0013] According to the present invention, the solution to this problem is the electric lifting device described herein.

[0014] The lifting device has a load sprocket and a drive shaft that drives the load sprocket via a transmission mechanism, as well as a motor with a motor shaft. The motor shaft and the drive shaft are coupled through a brake-clutch system.

[0015] According to the present invention, a brake clutch system includes a clutch portion coupling to a motor shaft and a brake hub rotatably arranged on a brake thread of a drive shaft. The clutch portion has a driving portion, and the brake hub has a pin. A vane disk is arranged between the clutch portion and the brake disc. The vane disk has radially outwardly pointing blades and is arranged on the coupling section of the drive shaft. The arrangement of the vane disk on the coupling section of the drive shaft is torsion-resistant. In particular, this is achieved by mating teeth between the vane disk and the coupling section. On the transmission mechanism side, i.e., on the side of the brake hub opposite to the clutch portion, a pressure disc is torsionally positioned on the drive shaft. Two friction discs and a brake disc coupled between the friction discs are arranged between the brake disc and the pressure disc. The brake disc is torsionally supported, i.e., anti-torsion supported.

[0016] This invention provides a motor-driven lifting device that operates faster, working in conjunction with a purely mechanical brake-clutch system. Preferably, the lifting device according to the invention is electrically driven by an electric motor. In this case, a battery or accumulator can be used as an energy storage device. Even if the lifting device is particularly electrically driven, it can also be driven by a compressed air motor or a hydraulic motor.

[0017] The lifting device according to the invention also features improved heat dissipation. Heat is transferred through physical contact between the brake disc and the housing. Improved heat dissipation enhances operation, particularly during continuous operation and / or under high loads on the lifting device.

[0018] The mechanical braking and clutch system, particularly the braking implementation of the lifting device according to the invention, also increases operational safety. Especially in the event of a drive failure, the load remains safe. This is a particular advantage, especially in battery-powered electric lifting devices.

[0019] The driving part of the clutch, the pin of the brake hub, and the blade body of the vane disc are therefore determined and configured to contact and interact during the operation of the lifting device, i.e., during rotation.

[0020] The brake hub can be axially displaced on the threaded section of the drive shaft that has brake threads.

[0021] Preferably, the brake disc is anti-torsional supported in the housing of the lifting device.

[0022] For this purpose, the brake disc has a groove, into which a support body disposed on the housing is fitted. An advantageous implementation is to provide a groove on the outer periphery of the brake disc and a support body on the wall of the housing. The brake disc is held in the housing in the form of a tooth and is torsionally oriented. It is a multi-form locking connection, in which the contact area between the brake disc and the housing, and therefore the heat transfer area, is large.

[0023] The brake disc is rotatably supported on the drive shaft via brake threads. The pressure disc cannot twist or move axially relative to the drive shaft. These two friction discs are arranged between the brake hub and the pressure disc, with the brake disc located between these two friction discs.

[0024] The brake hub has an annular receiving portion on the side facing the pressure disc. A first friction disc is received in the annular receiving portion. For this purpose, the friction disc is placed on the annular receiving portion of the brake hub with its central opening.

[0025] The pressure disc has a receiving section on the side facing the brake drum. A second friction disc is mounted on this receiving section. The receiving section is also configured as a joint or annular shape. The second friction disc is inserted into the receiving section with its central opening.

[0026] The first and second friction discs are preferably separate components. In principle, it is feasible for the first friction disc to be fixedly connected to the rear side of the brake drum or to form part of the brake drum. The second friction disc may also be fixedly connected to the pressure disc or to form part of the pressure disc. Between the first and second friction discs, the brake disc is torsionally supported in a housing.

[0027] One advantageous implementation is that the clutch portion has a driving portion projecting axially toward the brake drum, while the brake drum has a pin projecting axially toward the clutch portion. "Projecting axially" means that the driving portion of the clutch portion and the pin of the brake drum are axially oriented relative to each other, such that they contact and interact with each other during rotational motion.

[0028] The driving part of the clutch and the pin of the brake drum can rotate relative to each other. During the rotational movement of the clutch to reduce the load, the driving part and the pin come into contact with each other.

[0029] Furthermore, the driving part of the clutch and the blade body of the blade disk can rotate relative to each other. During the rotational motion of the clutch for lifting the load, the driving part and the blade body come into contact with each other at the corresponding stop surface or contact surface.

[0030] Furthermore, during the rotational motion of the clutch section for lifting the load, the driving part of the clutch section and the pin of the brake drum come into contact with each other, thereby driving the brake drum, which moves loosely together, through the driving part.

[0031] The clutch portion has a disc housing with a drive unit. In an advantageous implementation, the clutch portion is part of the output stage of an electric motor, which is a transmission motor located before the brake. The drive unit is constructed as a single, integral component of the same material as the disc housing. Axially, the drive unit is oriented such that it engages with the pins of the brake hub and makes action contact with each other during rotation. The clutch portion or the disc housing of the clutch portion is part of the driven gear of a planetary gear transmission mechanism.

[0032] The brake disc is torsionally supported within the housing. The housing can be formed from a portion or half of the housing. The housing half is detachably threaded. The motor housing can be integrated into the transmission housing.

[0033] One advantageous implementation is that the braking mechanism of the brake-clutch system has an additional spring element. This spring element is therefore determined and configured to facilitate brake closure during slow movement. For this purpose, the spring element presses the brake disc against the brake drum. The spring element is supported within a housing. The spring-elastic compression of the brake disc against the brake drum has the effect of generating the minimum frictional torque required to close the brake or brake-clutch system, even when the brake is open.

[0034] The spring element is supported in the housing on the side facing away from the brake disc. In particular, the end of the spring element facing away from the brake disc is housed in a receiving portion within the housing. Attached Figure Description

[0035] The invention will now be described in more detail with the aid of the accompanying drawings. In the drawings:

[0036] Figure 1 A perspective view of the electric lifting device according to the invention without an external housing is shown;

[0037] Figure 2 Show Figure 1 A side view of the lifting device;

[0038] Figure 3 Show Figure 2 The horizontal section along line AA in the view;

[0039] Figure 4 A side view of the lifting device is shown;

[0040] Figure 5 Show Figure 4 The vertical section along line BB in the view;

[0041] Figure 6 An exploded view of the components of the lifting device according to the present invention is shown;

[0042] Figure 7 A perspective view showing a component or component part of the braking and clutch system of the lifting device in its first operating position when the electric motor is removed;

[0043] Figure 8 This shows the second operating position of the brake-clutch system, corresponding to... Figure 7 The view;

[0044] Figure 9 This shows the third operating position of the brake-clutch system, corresponding to Figure 7 The view;

[0045] Figure 10 This shows the corresponding fourth operating position of the brake-clutch system. Figure 7 The view;

[0046] Figure 11 A side view of another embodiment of the lifting device according to the present invention is shown;

[0047] Figure 12 Show Figure 11 A sectional view along line AA;

[0048] Figure 13 Show Figure 12 A magnified view of part B;

[0049] Figure 14 An exploded view of the basic components or component parts of the lifting device according to the present invention is shown;

[0050] Figure 15 A perspective view showing a component or component of the braking and clutch system of the lifting device, in partial cross-section; and

[0051] Figure 16 This is a perspective view of the lifting device components or component parts as seen from the transmission mechanism side. Detailed Implementation

[0052] Figures 1 to 5 A lifting device 1 according to the present invention is shown. Components or component parts of the lifting device 1 may be... Figure 6 As seen in the exploded view. In particular, it is the electric lifting device 1.

[0053] The lifting device 1 has a support hook 2 as an upper fixing element. A load hook (not shown) serves as a lower fixing element. The support hook 2 and the load hook are indirectly connected to each other via a housing 3. The load hook is connected to the end of a load chain. For clarity, the load chain is also not shown. Figures 1 to 6 As shown in the image.

[0054] The load chain can be moved via a traction mechanism transmission device. The traction mechanism transmission device has a drive shaft 4, which drives the load sprocket 6 through a transmission mechanism 5. Figures 1 to 6 The lifting device 1 is shown without the housing cover portion of the transmission mechanism 5.

[0055] The load chain runs through and moves via the load sprocket 6.

[0056] This drive is performed by an electric motor 10, whose motor shaft 11 is coupled to the drive shaft 4 via a brake-clutch system 12 (for this purpose, see also the following). Figure 6 (Exploded view).

[0057] The brake clutch system 12 includes a clutch portion 13 that can be coupled to the motor shaft 11 and a brake hub 15 that is rotatably arranged on the brake thread 14 of the drive shaft 4.

[0058] The clutch portion 13 has a disc body 16 and a connecting section 17 protruding from the disc body 16 toward the electric motor 10. A clutch receiving portion 18 with internal teeth 19 is centrally provided in the connecting section 17. The clutch portion 13 can be placed on the complementary external teeth of the motor shaft 11 using the clutch receiving portion 18.

[0059] The clutch portion 13 has a driving portion 20 protruding axially toward the brake hub 15, and the brake hub 15 has a pin 21 protruding axially toward the clutch portion 13. A vane disk 22 is arranged between the clutch portion 13 and the brake hub 15. The vane disk 22 has radially outwardly pointing blade bodies 23. The vane disk 22 is arranged anti-torsionally on the coupling section 24 of the drive shaft 4. This is achieved by mating teeth between the vane disk 22 and the coupling section 24. The coupling section 24 has external teeth 25, and the vane disk 22 is inserted into the external teeth by means of internal teeth 26 provided in a centrally located mounting opening 27 of the vane disk 22.

[0060] On the transmission mechanism side, on the side of the brake hub 15 away from the clutch portion 13, a pressure plate 28 is positioned anti-torsionally on the drive shaft 4. For this purpose, the pressure plate 28 has an internal toothed portion 29 in its central mounting opening 30, which is positioned on the toothed mounting section 32 of the drive shaft 4 having an external toothed portion 31.

[0061] A first friction disc 33 and a second friction disc 34 are disposed between the brake hub 15 and the pressure disc 28. A brake disc 35 is arranged between these two friction discs 33 and 34. The brake disc 35 is supported in the housing 3 in a torsional or anti-torsional manner. For this purpose, the brake disc 35 has a bag-shaped groove 36 on its outer periphery. A toothed or claw-shaped support body 38 is disposed in the wall 37 of the housing 3 to mate with the groove 36. The support body 38 is fitted into the groove 36, so that the brake disc 35 is fixed in the housing 3 in the form of teeth.

[0062] On the rear side 39 of the pointing transmission mechanism 5 of the pressure plate 28, the pressure plate 28 is supported on the bearing 40.

[0063] The brake hub 15 has a centrally located annular receiving portion 42 on its rear side, on the rear side 41 facing the brake disc 35. The first friction disc 33 is inserted into the receiving portion 42 via its centrally located opening 43.

[0064] The pressure disc 28 has a centrally located receiving section 45 on its front side 44 pointing towards the brake disc 35. The second friction disc 34 has a centrally located opening 46 through which it is inserted into and positioned onto the receiving section 45 of the pressure disc 28.

[0065] The brake hub 15 is rotatably supported on the drive shaft 4 by means of brake threads 14. The pressure disc 28 cannot be twisted or moved axially relative to the drive shaft 4. Two friction discs 33 and 34 are arranged between the brake hub 15 and the pressure disc 28, and a brake disc 35 is located therebetween. The brake disc 35 is anti-torsional supported in the housing 3.

[0066] according to Figures 7 to 10This illustrates the motion process of the braking and clutch system 12 of the lifting device 1 when maintaining, lowering and raising the load.

[0067] exist Figures 7 to 10 In the clutch section 13, only the drive portion 20 protruding toward the brake hub 15 is shown.

[0068] The drive portion 20 of the clutch part 13 and the pin 21 of the brake drum 15 are arranged on a common external running or circular track, such that when the clutch part 13 and the brake drum 15 rotate relative to each other, and thus the drive portion 20 and the pin 21 rotate relative to each other, they come into contact and thus reach the working position.

[0069] The blade body 23 of the blade disk 22 and the driving part 20 of the clutch part 13 are also arranged on an internal running or circular track, so that they are in contact with each other and thus have an action relationship when they rotate.

[0070] To maintain the load, the load torque acting on the drive shaft 4 generates an axial force acting on the brake drum 15, thereby clamping the friction discs 33 and 34 located between the brake drum 15 and the pressure disc 28, and the brake disc 35 located between the two. Since the brake disc 35 is supported against the housing 3, the load is safely maintained. Here, the driving part 20 of the clutch portion 13 does not contact the blade body 23 of the vane disc 22, nor the pin 21 of the brake drum 15. Figure 7 This indicates the work location.

[0071] To reduce load (see...) Figure 8 The clutch part 13 rotates counterclockwise (arrow P1), causing the driving part 20 of the clutch part 13 to contact the pin 21 of the brake drum 15 and drive the brake drum 15. The rotational motion proceeds in the direction of arrow P1. The brake drum 15 slides axially on the brake thread 14 of the drive shaft 4, and the frictional locking contact with the first friction disc 33 is canceled. This reduces the axial force or frictional torque, and the load is reduced until the frictional torque is re-established. Figure 8 This indicates the working position. The load can be reduced until the continuously rotating drive shaft 4 compensates for the axial clearance again. The generally triangular or trapezoidal configuration of the drive portion 20 of the clutch part 13 acts on the pin 21. Utilizing its more inner working surface, the drive portion 20 contacts the blade body 23 of the blade disk 22. To increase the load, the clutch part 13 rotates clockwise. This... Figure 9As indicated by arrow P2. Through the rotation of the clutch portion 13, or during the rotational movement of the clutch portion, the driving portion 20 and the blade body 23 rotate relative to each other. The driving portion 20 of the clutch portion 13 collides with the stop surface of the blade body 23 of the blade disk 22. The blade disk 22 is torsionalally mounted on the drive shaft 4, such that the drive shaft 4 is driven by the blade disk 22. Through the rotation of the drive shaft 4 relative to the brake drum 15, the frictional torque is canceled, and the driving torque is now transmitted to the drive shaft 4 through the internal teeth 26 of the blade disk 22. Furthermore, the driving portion 20 of the clutch portion 13 drives the brake drum 15, which operates loosely together.

[0072] exist Figures 11 to 16 Another embodiment of the lifting device 1 according to the present invention is shown in the figure. Figures 11 to 16 The lifting device 1 in the view corresponds in basic structure to the lifting device described above. Corresponding components and component parts are given the same reference numerals. Refer to the above description of the lifting device 1.

[0073] The brake-clutch system 12 includes a clutch portion 13 that can be coupled to the motor shaft 11 and a brake hub 15 rotatably arranged on a brake thread 14 of the drive shaft 4. The clutch portion 13 has a disc body 16 with a drive portion 20 constructed thereon. The clutch portion 13 and its disc body 16 are components of the planetary gears of the output stage of the planetary gear transmission mechanism, through which an electric motor (not shown) drives the lifting device 1.

[0074] The clutch portion 13 has a drive portion 20 oriented on the brake drum side. The brake drum 15 has a pin 21 protruding axially toward the clutch portion 13.

[0075] A blade disk 22 is arranged between the clutch part 13 and the brake hub 15.

[0076] The driving part 20 is an integral component made of the same material as the disc body 16 of the clutch part 13 and is axially oriented toward the brake drum 15. During operation of the lifting device 1, the driving part 20 engages with the pin 21 of the brake drum 15 that protrudes toward the clutch part 13. During rotation, the driving part 20 of the clutch part 13, the pin 21 of the brake drum 15, and the blade body 23 of the blade disc 22 come into contact and work together to transmit torque.

[0077] Brake disc 35 is disposed between brake hub 15 and pressure disc 28. First friction disc 33 and second friction disc 34 are engaged on the front and rear planes of brake disc 35, respectively. Brake disc 35 is torsionally and anti-torsionally supported in housing 3.

[0078] When maintaining, lowering and raising the load, the braking process in the braking clutch system 12 of the lifting device 1 corresponds to the process explained above.

[0079] exist Figures 11 to 16 In the illustrated lifting device 1, an additional spring element 47 is integrated into the brake-clutch system 12. The spring element 47 is defined and configured to press the brake disc 35 against the brake hub 15. The spring element 47 is supported in the housing 3. For this purpose, a receiving portion 48 is provided on the side of the housing 3 opposite to the brake disc 35. The spring element 47 is a compression spring, particularly a coil spring. It is positioned in the receiving portion 48 in the housing 3 with one end 49 and acts on the brake disc 35 with the other end 50. In the illustrated embodiment, a total of four spring elements 47 are evenly staggered and arranged on a sub-circle. In particular, as shown in the figure... Figure 16 As shown, the end 50 of the spring element 47 rests against the outer tooth 51 of the brake disc 35.

[0080] The spring-elastic compression of the brake disc 35 against the brake hub 15 has the following effect: even when the brake is open, it always generates a minimum frictional torque that helps to close the brake or brake clutch system 12.

[0081] List of reference numerals in the attached diagram:

[0082] 1 Lifting device

[0083] 2 Support Hooks

[0084] 3 shells

[0085] 4 drive shafts

[0086] 5. Transmission Mechanism

[0087] 6 load sprockets

[0088] 7 gears

[0089] 8 drive teeth

[0090] 9 Load sprocket shaft

[0091] 10 electric motors

[0092] 11 motor shaft

[0093] 12 Brake-Clutch System

[0094] 13. Clutch section

[0095] 14 Brake Thread

[0096] 15 brake drum

[0097] 16-disc body

[0098] 17 Connecting Sections

[0099] 18 Clutch Reception Section

[0100] 19 Internal teeth

[0101] 20th Movement Department

[0102] 21 sales

[0103] 22-blade disc

[0104] 23-blade body

[0105] 244 coupling section

[0106] 2524 external teeth

[0107] 2622 internal teeth

[0108] 27 Installation opening

[0109] 28 pressure plate

[0110] 2930 internal teeth

[0111] 3028 mounting opening

[0112] 31 External teeth

[0113] 32 Installation Sections

[0114] 33 First Friction Disc

[0115] 34 Second Friction Disc

[0116] 35 brake disc

[0117] 36 grooves

[0118] 373 wall

[0119] 38 support bodies

[0120] The rear side of 3928

[0121] 40 bearing

[0122] The rear side of 4135

[0123] 42 Reception Department

[0124] The opening in 4333

[0125] 4428's front side

[0126] 45 Accommodation Section

[0127] The opening in 4634

[0128] 47 Spring Components

[0129] 48 Accommodation Department

[0130] End of 4947

[0131] 5047 end

[0132] 5135 tooth body

[0133] Arrow P1

[0134] P2 arrow

Claims

1. A lifting device having a load sprocket (6) and a drive shaft (4) that drives the load sprocket (6) via a transmission mechanism (5), and a motor (10) with a motor shaft (11), the motor shaft (11) and the drive shaft (4) being coupled via a brake-clutch system (12), characterized in that, The brake clutch system (12) has a clutch portion (13) that can be coupled to a motor shaft (11) and a brake hub (15) rotatably arranged on a brake thread (14) of a drive shaft (4). The clutch portion (13) has a drive portion (20) and the brake hub (15) has a pin (21). A vane disk (22) is arranged between the clutch portion (13) and the brake hub (15). The vane disk has a vane body (23) and is arranged on a coupling section (24) of the drive shaft (4). A pressure disk (28) is torsionally positioned on the drive shaft (4) on the transmission side of the brake hub (15). Two friction disks (33, 34) and a brake disk (35) coupled between the friction disks (33, 34) are arranged between the brake hub (15) and the pressure disk (28). The brake disk (35) is torsionally supported.

2. The lifting device according to claim 1, characterized in that, The drive part (20) and the pin (21) can rotate relative to each other and come into contact with each other in the rotational motion of the clutch part (13) for reducing the load.

3. The lifting device according to claim 1 or 2, characterized in that, The drive unit (20) and the blade body (23) can rotate relative to each other and come into contact with each other in the rotational motion of the clutch part (13) for lifting the load.

4. The lifting device according to claim 3, characterized in that, During the rotational motion of the clutch part (13) for lifting the load, the drive part (20) and the pin (21) come into contact and the brake drum (15) moves in the direction of rotation.

5. The lifting device according to claim 1 or 2, characterized in that, The brake disc (35) is supported in the housing (3).

6. The lifting device according to claim 5, characterized in that, The brake disc (35) has a groove (36), and a support body (38) provided on the housing (3) is fitted into the groove.

7. The lifting device according to claim 6, characterized in that, The groove (36) is provided on the outer periphery of the brake disc (35), while the support body (38) is provided on the wall (37) of the housing (3).

8. The lifting device according to claim 1 or 2, characterized in that, The pressure plate (28) is supported on the bearing (40) on the transmission mechanism side.

9. The lifting device according to claim 1 or 2, characterized in that, The brake hub (15) has an annular receiving portion (42) on the side facing the pressure plate (28), on which a first friction plate (33) is arranged.

10. The lifting device according to claim 1 or 2, characterized in that, The pressure plate (28) has a receiving section (45) on the side facing the brake hub (15), on which a second friction plate (34) is arranged.

11. The lifting device according to claim 1 or 2, characterized in that, The drive part (20) protrudes axially toward the brake hub (15), while the pin (21) protrudes axially toward the clutch part (13).

12. The lifting device according to claim 1 or 2, characterized in that, A spring element (47) is provided, which is defined and configured to press the brake disc (35) against the brake hub (15).

13. The lifting device according to claim 12, characterized in that, The spring element (47) is supported in the housing (3).

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