DE102019131986A1 - Drive unit for a lifting and tilting device - Google Patents

Abstract

The present invention relates to a drive unit (50) for a lifting and tilting device (14) of a garbage truck (10) with at least one slide (40), a lifting truck (78) for receiving a garbage container (100), a linear guide (22) for the slide (40) and a drive device (60) for moving the slide (40) along the linear guide (22). In order to provide a drive unit (50) in which the lifting and tilting is carried out by a single drive, it is provided that the slide (40) has a gear unit (70) with at least two interacting gear parts for converting the linear movement of the slide (40) into has a rotary movement of one of the gear parts, wherein at least one of the interacting gear parts can be blocked by a blocking part (21).

Description

The present invention relates to a drive unit for a lifting and tilting device.

A large number of lifting and tilting devices for garbage trucks are already known from the prior art. Lift and tilt devices are used to lift and tilt garbage containers to be emptied, in particular garbage cans. By lifting a garbage container is moved to a pouring opening of the garbage truck. The subsequent tilting leads to the fact that the contents of the refuse container are emptied through the pouring opening into a collecting container of the refuse vehicle.

There are also known lifting and tilting devices which have two separate emptying devices for one garbage container each. With such lifting and tilting devices, two garbage bins can be emptied independently of one another. Each emptying device has a lift truck there for receiving one garbage container. The lift trucks of two emptying devices can be coupled. In this way, large garbage containers can also be emptied.

In the past, the lifting and tilting functions were often considered separately and performed by two independent drives. In the DE 25 17 247 A1 an electric pushing and pulling device, in particular for lifting and / or tipping loads, is disclosed. The DE 2 146 653 provides separate pressure or lifting cylinders for the lifting movement on the one hand and the tilting movement on the other.

The pamphlets DE 44 17 737 A1 and DE 44 23 718 C1 show devices in which a stationary, toothed element, namely the rolling segment, is provided. A cam segment / gear element is provided on the tilting shaft of a lift truck, which, after a certain vertical lift of the lift truck, engages the stationary rolling segment, thereby triggering a tilting movement. With these devices there is a risk that the engagement between the rolling segment and the curve segment will fail, which can lead to damage to the device. Furthermore, both the rolling segment and the curved segment can become soiled by the contents of the garbage container, which can hinder or make the tilting movement more difficult.

The object of the invention is to create a new drive for a lifting-tilting device with which lifting and tilting are carried out by a single drive.

This object is achieved by a drive unit according to claim 1.

The drive unit for a lifting and tilting device has at least one slide, a linear guide for the slide and a drive device for moving the slide along the linear guide.

The object is achieved in particular in that the carriage has a gear unit with at least two cooperating gear parts for converting the linear movement of the carriage into a rotary movement of one of the gear parts, at least one of the cooperating gear parts being able to be blocked by a blocking part.

The gear part which is rotated is preferably connected or can be connected to the lifting truck of the lifting and tilting device and then leads to a tilting movement of the lifting truck in the event of a rotary movement.

As a result of the gear unit, basically only a single drive device is required both for the linear movement of the slide and for the tilting movement of the lift truck. Switching the gear unit is particularly simple and reliable, since it is done automatically by the blocking part. In particular, it is provided that blocking the lockable transmission part causes the transmission unit to be switched from a passive to an active mode. In the passive mode, the transmission parts do not move relative to one another. In the active mode, a relative movement takes place between the gear parts, as a result of which the linear movement of the slide is converted into a rotary movement of the rotatable gear part or a tilting movement of the lift truck. In particular, it is provided that, in the active mode, one of the transmission parts does not perform any movement relative to the linear guide.

The lift truck is preferably connected or connectable, in particular non-rotatably, directly or indirectly to at least one of the cooperating gear parts, in particular the rotatable. The lift truck preferably has a receiving comb for receiving a refuse container. The lift truck is preferably rotatably arranged or can be arranged on the slide.

The slide is preferably movable along the linear guide between a receiving position and an emptying position. In the receiving position, a garbage container to be emptied can be attached to the slide or a component attached to it, in particular the lifting truck. The carriage is then moved into the emptying position by the drive device. The rubbish bin is first lifted and then tilted. In the emptying position, the contents of the garbage container fall into a collecting container, in particular that of a garbage truck, in particular through a pouring opening.

The drive device preferably comprises a threaded spindle and a spindle nut. The threaded spindle runs through the spindle nut. The threaded spindle and threaded nut can be rotated relative to one another. A rotary movement of one of the parts additionally leads to a relative linear movement between the parts along the axis of rotation. The threaded spindle preferably runs vertically. The combination of threaded spindle and spindle nut enables an efficient conversion of a rotational movement into a linear movement for lifting the slide. This makes it possible, for example, to use an electric motor to lift and tilt the garbage container.

The threaded spindle is preferably firmly connected to the linear guide and furthermore preferably runs parallel to the linear guide. When used as intended, the spindle nut thus moves around the threaded spindle and linearly along the main axis of the threaded spindle. The spindle nut is thus preferably about an axis of rotation D1 rotatably mounted in the carriage. As a result of this design, only the weight of the spindle nut, which is relatively small in comparison with the threaded spindle, has to be moved, so that the drive unit can lift more payload and requires less energy for lifting. The axis of rotation D1 preferably runs vertically.

An electric motor is preferably provided which drives the spindle nut and which is firmly connected to the slide. An electric motor has significant advantages over the hydraulic drives usually installed in garbage trucks. First of all, several components required for a hydraulic drive, such as hydraulic power pack, hose lines, etc., are no longer necessary. In addition, electric motors are quieter, which reduces the noise pollution of the operating personnel and the environment. It is particularly advantageous to use an electric motor that is operated with 24 V direct voltage, since the electric motor can then be connected directly to the on-board network of the garbage truck. The use of the drive unit according to the invention with an electric motor in garbage trucks with an electric drive is also particularly advantageous. There, an electric motor can be operated directly with the energy from the traction battery of the garbage truck, so that no separate energy storage is required.

The electric motor is also preferably capable of recuperation, that is to say in particular capable of acting as a generator. The electric motor is particularly preferably designed in such a way that it converts kinetic energy into electrical energy during the downward movement of the carriage after the garbage container has been emptied. In this way, the downward movement is braked, so that the bin is not accelerated more than necessary. In addition, part of the electrical energy used for the lifting movement is recovered.

The lockable gear part can be locked in particular with regard to a movement relative to the linear guide. This means that the lockable gear part and the linear guide do not move relative to one another when the lockable gear part is blocked. The lockable gear part is preferably blocked by the linear guide itself or an element arranged thereon. Alternatively, blocking by an element of the lifting and tipping device or the garbage truck, for example an element arranged on the collecting container, is also possible. Blocking by the linear guide itself or an element arranged on it has the advantage that no changes need to be made to the garbage truck, in particular to its collecting container.

The lockable gear part is preferably not blocked in positions of the slide between the receiving position and a switching position and is blocked between the switching position and the emptying position. When the slide is raised along the linear guide, the switchover between passive and active mode of the gear unit takes place at the moment of blocking. In this way, no separate switching device is necessary for the transmission unit, which limits the complexity of the drive unit.

With the devices in the publications DE 44 17 737 A1 and DE 44 23 718 C1 two gear parts are provided which are not in engagement with one another at the beginning of the lifting movement and only contact one another later, whereupon the tilting movement is triggered. The cooperating gear parts of the invention are preferably in engagement with one another in any position of the carriage. This avoids the risk of incorrect engagement of the transmission parts with one another. Rather, it is ensured that when the blockable threaded part is blocked, the tilting movement takes place immediately.

A toothed rack and a toothed element, in particular a toothed wheel, are preferably provided as cooperating transmission parts. This enables a simple conversion of the linear movement of the slide into a tilting movement of the lift truck. The lift truck is preferably directly or indirectly connected to the tooth element or connectable. The tooth element can, for example, also be a partial (for example half) gearwheel or the like, if a complete gearwheel is not necessary for the tilting movement. In such a case, a weight saving is achieved by using a partial gear wheel.

The tooth element is preferably connected to a pivot shaft. The lift truck is preferably connected or connectable to the pivot shaft. In this way, the pivot shaft and the lift truck are rotated with the rotary movement of the toothed element. This will tilt the bin. The toothed element is particularly preferably fastened as a spur gear to one end of the pivot shaft. The tooth element is then as far as possible outside of the area in which the garbage container to be emptied is arranged. The pivot shaft can be designed in one or more parts. In particular, a spur gear shaft can be provided which forms the gear or is connected to the then separate gear. A further shaft can then be pushed coaxially onto the spur gear shaft, the lifting truck being connected to the further shaft. The assembly is simplified by the multiple parts.

The rack is preferably the lockable gear part. The effort to block an elongated rack is less than the effort to block a gear. Blocking the rack is also preferable because the carriage and with it the rack anyway perform a linear movement, so that only the linear movement of the rack has to be prevented to block the rack.

The linear guide is preferably arranged vertically. The rack is preferably arranged parallel to the linear guide, that is to say in particular also vertically. The axis of rotation of the tooth element then runs horizontally, so that no further gear parts are required in addition to the tooth element in order to effect a tilting movement. This limits the complexity of the drive unit.

The blocking part is preferably a stop for the rack. A stop can be implemented in a simple manner and can be made robust, as a result of which the drive unit has a long service life. The stop is preferably arranged on the linear guide. The blocking part is preferably made of plastic, rubber or rubber. In this way, the blocking process does not take place suddenly but is dampened. This limits the noise generated and protects the components involved in the blockage.

The linear guide preferably comprises two parallel rods. The round bars preferably run vertically. This minimizes the area required by the linear guide and, in this way, the space it requires. The round bars are preferably connected at least by an upper connecting web, particularly preferably by an upper and a lower connecting web, as a result of which the linear guide gains in rigidity. The connecting webs are preferably arranged at vertically opposite ends of the round bars. The connecting webs also prevent the slide from falling off the round bars.

The connecting webs are preferably parts of a frame which is fixed to the collecting container of the garbage truck. The use of such a frame facilitates the fixation, since standardized fixation points are usually given on the collecting container. The stop for the rack is preferably arranged on the frame, in particular on the upper connecting web. The frame offers sufficient stability for the forces that occur when the rack and stop come into contact.

The slide advantageously has a housing for the gear unit. A housing limits the contamination of the transmission parts, with in particular at least those sections of the transmission parts which have teeth being arranged in the housing. It is particularly advantageous here if the cooperating gear parts are in engagement with one another in every position of the slide. This results in a compact housing through which the tooth sections of the gear parts are protected from contamination. In addition, the housing reduces the risk of injuries, since the gear parts are not directly accessible, and thus increases work safety.

In advantageous developments, a spring, in particular a compression spring, is provided which interacts with one of the transmission parts, in particular the rack. The compression spring is arranged in such a way that it is compressed by the toothed rack during the upward movement of the carriage and is thereby pretensioned. If the rack is then blocked, nothing changes at first on the spring. If the garbage container is to be moved downwards again and tilted back for this purpose, the compression spring supports the tilting back. This ensures that the garbage can is even tipped back again. In either case, however, the tilting back is accelerated. The compression spring is preferably arranged in a protective sleeve into which the rack is pushed when the slide moves upwards.

The spindle nut and the electric motor, in particular moving parts of the electric motor, are preferably arranged in the housing of the slide. These parts are also made by this Contamination protected and the risk of injury minimized. The electric motor is preferably firmly connected to the housing. In this way a relative movement between the electric motor and the housing is prevented.

The toothed element and / or the pivot shaft, in particular its spur gear shaft, are preferably rotatably arranged or can be arranged on the slide, in particular relative to the housing. This means that the housing does not have to be rotated, which again limits energy consumption.

The housing preferably has guide bores for the linear guide, in particular for the round rods of the linear guide. In this way, the housing can be displaced along the linear guide and the housing is stabilized by the linear guide. Bearings, in particular a roller bearing for the round bars of the linear guide, are preferably provided in the guide bores.

A lifting and tilting device with at least one emptying device is also disclosed, the emptying device having at least one drive unit. The drive unit has a slide, a lift truck for receiving a refuse container, a linear guide for the slide and a drive device for moving the slide along the linear guide. The drive unit is preferably a drive unit as described above.

The carriage has a gear unit for converting the linear movement of the carriage into a tilting movement of the lift truck, the gear unit comprising at least two interacting gear parts, at least one of which can be blocked by a blocking part.

The lifting and tilting device preferably has two emptying devices. The axes of rotation of the tooth elements are then preferably identical. The linear guides and / or the threaded spindles of the emptying devices are preferably arranged at opposite ends of the lifting and tilting device. In this way, the space between the linear guides and / or threaded spindles is greatest, so that even large garbage containers can be picked up and emptied by the lift truck.

In preferred embodiments of the lifting and tilting device, two emptying devices are provided in accordance with the above description, the lifting trolleys of the emptying devices being able to be coupled to one another. The coupling connects the pallet trucks to form a stable unit. The coupling takes place mechanically, electromechanically or electrically controlled. In this way, so-called large garbage containers can be lifted. Large waste containers usually have a volume of 660 l, 770 l, 1000 l or 1100 l and have four rollers. Normal rubbish bins that can be lifted with a forklift truck regularly have a volume of 60 I, 80 I, 120 I, 140 I, 180 I, 240 I, 340 I or 360 I and only two rollers. When the lift trucks are coupled, the carriages are preferably controlled in such a way that they perform the lifting movement at the same time.

The linear guide and with it the direction of movement of the slide preferably run vertically as described. The axis of rotation of the tooth element runs preferably perpendicular to the linear guide and perpendicular to the direction of travel of the garbage truck.

• 1 ein Müllfahrzeug mit einer Hub-Kipp-Vorrichtung in einer Rückansicht;
• 2 die Hub-Kipp-Vorrichtung der 1 in einer Seitenansicht mit einem Schlitten in einer Aufnahmeposition;
• 3 das Detail A der 2 in vergrößerter Darstellung;
• 3a einen Schnitt durch die Hub-Kipp-Vorrichtung in gleicher Ansicht wie 3;
• 4 die Hub-Kipp-Vorrichtung der 1 in einer Seitenansicht mit dem Schlitten in einer Schaltposition;
• 5 die Hub-Kipp-Vorrichtung der 1 in einer Seitenansicht mit dem Schlitten in einer Entleerposition;
• 6 das Detail B der 5 in vergrößerter Darstellung.

The invention is illustrated and explained by way of example with reference to the figures. It shows:

• 1 a garbage truck with a lifting and tilting device in a rear view;
• 2 the lifting and tilting device of the 1 in a side view with a carriage in a receiving position;
• 3rd the detail A of the 2 in an enlarged view;
• 3a a section through the lifting and tilting device in the same view as 3rd ;
• 4th the lifting and tilting device of the 1 in a side view with the carriage in a switching position;
• 5 the lifting and tilting device of the 1 in a side view with the carriage in an emptying position;
• 6th the detail B of the 5 in an enlarged view.

That in the 1 only partially shown garbage truck 10 has a collecting container 12th as well as a lifting and tilting device 14th on that in the area of a pouring opening 16 on the collecting container 12th is arranged. Through the pouring opening 16 when used as intended, rubbish is thrown into the collection container 12th brought in. A pressing plant (not shown) can be provided there, which compresses the waste. In the area of the pouring opening 16 are two retaining elements (not shown) for retaining rubbish bins 100 arranged during the pouring process.

The lifting and tilting device 14th includes two emptying devices 20th with one pallet truck each 78 for lifting and tipping garbage bins 100 , the pallet truck 78 is arranged on a pivot shaft. Each pallet truck has a pick-up comb 48 and an abutment element 49 on. Any emptying device 20th is assigned to a retaining element. The lifting takes place along the Y-axis and the tilting around the X-axis of a Cartesian coordinate system, the Z-axis of the coordinate system being parallel to the direction of travel of the garbage truck 10 runs. The emptying devices 20th are identical in construction, but mirrored on a YZ plane running through the center of the garbage truck. Therefore, only one emptying device is described below 20th described in detail.

One of the emptying facilities 20th is in the 2 , 3rd and 3a shown in more detail and has a drive unit 50 on. The drive unit 50 has a linear guide 22nd with two parallel rods as guide elements for a slide 40 on. The round bars run vertically, i.e. parallel to the Y-axis. The linear guide 22nd has two connecting webs at vertically opposite ends 28 , 29 which connect the round bars to each other. The connecting bridges 28 , 29 are parts of a framework 30th that is attached to the collection container 12th of the garbage truck 10 is fixed.

The sled 40 has a housing 42 with guide holes for the round rods. There are bearings in the guide bores 46 (see 3a) arranged so that the slide 40 is linearly movable along the rods.

The drive unit 50 furthermore has a drive device 60 to move the carriage 40 along the linear guide 22nd on. The drive device 60 includes a threaded spindle 62 and a spindle nut 64 . The lead screw 62 runs vertically between the round bars and is with the connecting webs 28 , 29 firmly connected. The spindle nut 64 is so in the housing 42 stored that they are about an axis of rotation D1 is rotatable parallel to the Y-axis. Translational relative movements between the housing 42 and spindle nut 64 however, are not possible. The axis of rotation D1 corresponds to the main axis of the threaded spindle 62 .

The drive device 60 further comprises an electric motor 66 that is firmly attached to the case 42 connected is. The electric motor 66 drives the spindle nut 64 so that it revolves around the axis of rotation D1 turns. The rotation results in a linear movement between the spindle nut 64 and threaded spindle 62 along the axis of rotation D1 . As the spindle nut 64 with the case 42 connected, so will the housing 42 as well as attached components along the axis of rotation D1 and thus moved vertically.

The sled 40 also has a gear unit 70 to convert the linear movement of the slide 40 in a tilting movement of the pallet truck 78 on. The gear unit 70 comprises two cooperating gear parts, namely a rack 72 and a gear 74 . Rack 72 and gear 74 are in every position of the slide 40 engaged with each other. The rack 72 runs vertically. To the gear 74 includes a pivot shaft 76 (see 1 ) with the gear 74 as a spur gear of the swivel shaft 76 is executed. The pivot shaft 76 is multi-part. The axis of rotation D2 of the gear 74 and the pivot shaft 76 runs parallel to the X-axis. On the swivel shaft 76 is the pallet truck 78 arranged. gear 74 , Swivel shaft 76 and pallet trucks 78 are rotatably connected to each other, so that a rotation of the gear 74 automatically results in the pallet truck tipping 78 leads.

The 2 , 3rd and 3a show the sledge 40 in a receiving position in which a garbage can 100 on the pallet truck 78 can be arranged. Will now be the sled 40 by means of the drive device 60 raised, the pivot shaft move 76 , the pallet truck 78 and the garbage can 100 with the sledge 40 up.

The sled 40 is moved upwards until it has reached a switching position that is shown in 4th is shown. The gear 74 who have favourited swivel shaft 76 , the pallet truck 78 and the garbage can 100 are not tilted in the switching position compared to the receiving position. The rack 72 is in the switching position against a stop 23 of the upper connecting web 28 at. The rack 72 is when the carriage moves again 40 blocked upwards by taking off from the stop 23 is prevented from moving in the same direction. The attack 23 in this way forms a blocking part 21 for the rack 72 . As the gear 74 however, continue with the sledge 40 Moved vertically upwards, it rolls on the rack 72 from, which is the axis of rotation, which is also moving vertically upwards D2 turns. This causes the pivot shaft to rotate 76 as well as a tilting movement of the pallet truck 78 and the bin 100 around the axis of rotation D2 .

The sled 40 points on its housing 42 a protective sleeve 73 for a lower end of the rack 72 on. When the rack 72 at the stop 23 the carriage moves 40 more or less on the rack 72 past. With this movement of the slide 40 becomes the protective sleeve 73 over the lower end of the rack 72 pushed. The rack 72 is thus protected from damage and contamination. In the protective sleeve 73 is a compression spring ( 75 ) arranged. Become the sledge 40 and with it the protective sleeve 73 relative to the rack 72 moved upwards, the rack is tensioned 72 the compression spring 75 in front. The compression spring 75 is from the protective sleeve 73 also protected from damage and contamination.

Will the sled 40 from the drive device 60 Moved further up from the switching position, it finally reaches the into the 5 and 6th depicted emptying position. The garbage can 100 is then completely tipped in, so that it is in the bin 100 existing garbage through the pouring opening 16 into the collecting container 12th falls. Then the slide can 40 be moved back down to an end position that corresponds to the receiving position. The recuperation-capable electric motor is used for this 66 switched to a recuperation mode. The electric motor 66 drives the spindle nut 64 then no longer on, but is rather able to turn the spindle nut 64 to convert into electrical energy and in an energy store (not shown) of the garbage truck 10 save. The spindle nut 64 is set in rotation because the slide is 40 moved downwards due to gravity and the lack of propulsion. In this way, some of the energy needed to lift the bin 100 expended, recovered. The recuperation also causes the slide to move downwards 40 braked. The noise level of the lift and tilt device 14th is limited as a result and there is also a lower risk of injury from the falling garbage container 100 .

The garbage can 100 must when moving the slide 40 be tilted back down again so that it has the same orientation in the end position as in the receiving position. The compression spring 75 in the protective sleeve 73 supports the tilting back movement of the bin 100 by applying the stored spring energy to the rack 72 transmits as soon as the rack 72 no longer at the stop 23 is applied. The rack 72 is thereby moved upwards, whereupon the gearwheel 74 and with it the swivel shaft 76 and the pallet truck 78 be swiveled back and the garbage can 100 is tilted back.

List of reference symbols

10

Garbage truck

12th

Collection container

14th

Lift and tilt device

16

Pouring opening

20th

Emptying device

21

Blocking part

22nd

Linear guide

23

attack

28

upper connecting web

29

lower connecting bridge

30th

frame

40

Sledge

42

casing

46

warehouse

48

Pick-up comb

49

Abutment element

50

Drive unit

60

Drive device

62

Threaded spindle

64

Spindle nut

66

Electric motor

70

Gear unit

72

Rack

73

Protective sleeve

74

gear

75

feather

76

Swivel shaft

78

Pallet truck

100

Garbage cans

D1

Axis of rotation

D2

Axis of rotation

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 2517247 A1 [0004]
• DE 2146653 [0004]
• DE 4417737 A1 [0005, 0020]
• DE 4423718 C1 [0005, 0020]

Claims (18)

Drive unit (50) for a lifting and tilting device (14), the drive unit (50) having at least one slide (40), a linear guide (22) for the slide (40) and a drive device (60) for moving the slide ( 40) along the linear guide (22), characterized in that the carriage (40) has a gear unit (70) with at least two cooperating gear parts for converting the linear movement of the carriage (40) into a rotary movement of one of the gear parts, of which the cooperating Gear parts at least one of a blocking part (21) can be blocked. Drive unit (50) after Claim 1 , characterized in that blocking the lockable transmission part causes the transmission unit (70) to be switched from a passive to an active mode. Drive unit (50) after Claim 1 or 2 , characterized in that the carriage (40) can be moved along the linear guide (22) between a receiving position and an emptying position. Drive unit (50) according to one of the preceding claims, characterized in that the drive device (60) comprises a threaded spindle (62) and a spindle nut (64). Drive unit (50) after Claim 4 , characterized in that the threaded spindle (62) is firmly connected to the linear guide (22) and runs parallel to the linear guide (22). Drive unit (50) after Claim 4 or 5 , characterized in that an electric motor (66) is provided which drives the spindle nut (64) and which is firmly connected to the slide (40). Drive unit (50) according to one of the preceding claims, characterized in that the lockable gear part can be locked with respect to a movement relative to the linear guide (22). Drive unit (50) according to one of the preceding claims, characterized in that the lockable gear part is not blocked in positions of the carriage (40) between the receiving position and a switching position and is blocked between the switching position and the emptying position. Drive unit (50) according to one of the preceding claims, characterized in that the cooperating gear parts are in engagement with one another in every position of the slide (40) and / or that a toothed rack (72) and a toothed element, in particular a toothed wheel (74 ) are provided. Drive unit (50) after Claim 9 , characterized in that the rack (72) is the lockable gear part. Drive unit (50) after Claim 9 or 10 , characterized in that the rack (72) is arranged parallel to the linear guide (22). Drive unit (50) according to one of the Claims 9 to 11 , characterized in that the blocking part (21) is a stop (23) for the rack (72). Drive unit (50) according to one of the preceding claims, characterized in that the linear guide (22) comprises two parallel round bars. Drive unit (50) after Claim 13 , characterized in that the round bars are connected by at least one upper connecting web (28). Drive unit (50) after Claim 14 , characterized in that the stop (23) for the rack (72) is arranged on the upper connecting web (28). Drive unit (50) according to one of the preceding claims, characterized in that the slide (40) has a housing (42) for the gear unit (70). Drive unit (50) after Claim 16 , characterized in that the spindle nut (64) and the electric motor (66), in particular moving parts of the electric motor (66), are arranged in the housing (42). Drive unit (50) after Claim 16 or 17th , characterized in that the housing (42) has guide bores for the linear guide (22).

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