EP4172441A1

EP4172441A1 - Locking device

Info

Publication number: EP4172441A1
Application number: EP21735621.1A
Authority: EP
Inventors: Dirk Backhaus
Original assignee: USM Holding AG; Burg FW Lueling Kg
Current assignee: Burg Lueling & Co Kg GmbH; USM Holding AG
Priority date: 2020-06-26
Filing date: 2021-06-18
Publication date: 2023-05-03
Anticipated expiration: 2041-06-18
Also published as: EP4172441C0; JP7522870B2; AU2021294863B2; US20230250676A1; KR20230025910A; EP4172441B1; AU2021294863A1; CA3188119A1; CN115735040A; WO2021259776A1; JP2023534627A; DE202020103687U1

Abstract

The invention relates to an improved locking device for the closure of doors on cabinets, of boxes or compartments, which offers high resistance to unauthorized attack and, in particular, can take up high torques. For this purpose, use is made of a coupling arrangement having a manually or electronically movable actuating member, a driver (40), which interacts with the actuating member, and a blocking member (50). The blocking member (50) has the form of a cylinder, the cylinder axis of which runs parallel to the rotor axis (19). The blocking member (50) in its blocking position engages in a depression (17) on the outer side of the rotor (10) or in a depression (22) on the inner side of the wall (21) of the stator (20) and is held in this blocking position by spring force.

Description

Locking device

The invention relates to a locking device for locking doors on cupboards, boxes or compartments.

It is known to provide a door with a locking device. A locking element of the locking device interacts with corresponding locking plates on the cabinet, on the box or on the compartment to be locked. The locking element can be a bolt or a push rod. In order to prevent unauthorized opening of the door, it is also known to equip a locking device with a mechanical lock, such as a lock cylinder or an electronic lock, and to grant access or access only to authorized persons. Such locking devices have a high level of security. Unauthorized persons therefore try to open the locking device by rotating or moving the locking element. In the event of such an unauthorized attack from the outside, the locking device must be able to offer considerable resistance.

The object of the invention is therefore to provide an improved locking device which offers high resistance to an unauthorized attack on the locking device, in particular can absorb high torques.

This object is achieved with a locking device having the features of claim 1. The subclaims describe advantageous embodiments.

The new locking device for locking doors on cabinets, boxes or compartments comprises a housing for attachment to the door, the housing forming the stator of the locking device and in the shape of a pot is formed, namely has a bottom which can be placed on the door and which is attached to the door leaf. A locking element cooperates on the other side of the door in a known manner with a strike plate on the cabinet, box or the compartment to be locked. The rotor is connected directly or indirectly to the movable locking element. By moving the rotor in both directions of rotation, the locking element is moved from the locking position into the unlocking position or back into the locking position. The rotor is rotatably mounted on the housing for this purpose. The new locking device comprises a coupling arrangement, with a locking mechanism preventing unauthorized rotation of the rotor and thus also rotation of the locking element. For this purpose, the coupling arrangement comprises a manually or electronically adjustable actuator, a movable driver and a locking member. The locking member, which can be displaced between a locking position and a release position, enables the rotor to move only in its release position. The actuator has two positions, a decoupled rest position where the rotary movement of the rotor is prevented by the locking member and a coupled position where movement of the rotor is possible.

The locking member has the shape of a cylinder, the cylinder axis running parallel to the rotor axis. In its locked position, the locking member dips into a trough on the inside of the wall of the stator or on the outside of the rotor. The size of this crescent-shaped depression is adapted to the cylinder radius of the locking member. In the locking position, the locking member is pressed into this trough by a spring force, preferably less than a third of the locking member is located in this trough. The spring force is exerted here by a spring which exerts a spring force radially to the rotor axis. The spring for a locking member is held on the rotor when the trough is provided on the stator. The spring is held on the stator when the trough is provided on the rotor. To enable the movement of the rotor, the authorized user can move the actuator from the decoupled rest position into a coupled position, where this actuator is coupled to the driver.

In one embodiment, the actuator is mounted on the rotor and when the rotor rotates, the driver is then moved along by its coupling with the actuator. The driver moves the locking member from its locking position into a release position. The locking member is displaced by the driver against the acting spring force out of the trough on the stator side and is received on the rotor. In order to move the locking part, the driver has, on its lower part arranged below the rotor, a channel running in the radial direction, which in the locking position of the locking part is filled by the locking part. The parallel side surfaces of the channel act in a special way as stop surfaces on the locking member. They drive the locking member out of the stator-side trough because they attack the apex of the cylindrical locking member. When the driver moves, the locking member is displaced out of the trough on the stator side counter to the spring force and rotation of the rotor is made possible. The stop surfaces can also be beveled in order to reduce the disengagement torque.

In a further embodiment, the actuator is mounted on the stator or housing of the locking device and engages in a groove driver, whereby the driver is held and when the rotor is rotated, the locking element is moved from its locking position to a release position. The locking member is displaced against the acting spring force from the trough on the rotor side into a trough on the stator side and is received there. In this case too, the driver has a channel which runs in the radial direction and which is filled by the blocking part in the blocking position. The parallel side surfaces of the channel act in a special way as stop surfaces on the locking member. They drive the locking member Movement of the rotor out of the trough on the rotor side, as they attack the apex of the cylindrical locking member.

The coupling described above enables the door to be unlocked or locked. In the decoupled position, however, torque transmission starting from the locking element in the direction of the rotor is blocked. In such an unauthorized attempt to turn the rotor, a torque is generated which causes the locking part to be pressed against the rotor-side or stator-side inclined stop surfaces and so the locking part is pushed into its locking position in addition to the spring force in the radial direction. In order to prevent the locking device from being destroyed in the event of such attacks, appropriate play is provided for the rotor. Two embodiments of the invention are described below with reference to the drawing. The same elements have the same reference numbers in the different embodiments. The drawing shows:

1 shows a perspective view of a locking device without a rotor cover,

2 shows a view of the underside of a first locked locking device without a bottom surface of the stator,

3 shows a perspective view of the underside of a further locked locking device without a bottom surface of the stator,

FIG. 4 shows a view of the underside of the locking device without the bottom surface of the stator from FIG. 3,

FIG. 5 is a view of FIG. 4 in the release position, 6 shows a perspective view of the coupling arrangement, decoupled,

7 shows a perspective view of the coupling arrangement, coupled,

8 shows a plan view of the rotor, decoupled,

9 shows a further plan view of the rotor, decoupled,

10 is a plan view of the rotor, coupled,

11 shows a view of a further locking device in the locking position,

Fig. 12 is a view of Fig. 11 after an unauthorized rotor rotation attempt,

13 shows a view of FIG. 11 in the unlocked position.

In Fig. 1, an embodiment of the new locking device for locking doors on cupboards, boxes or compartments is shown. The new locking device comprises a stator 20 for attachment to the door, the stator 20 being pot-shaped, namely having a base which can be placed on the door and which is fastened to the door by means of fastening elements 24 - shown in FIG. 2. A locking element 70 on the other side of the door cooperates in a known manner with a strike plate on the cabinet, box or the compartment to be locked. A central hole in the bottom of the stator 20 is located after the assembly in front of the corresponding hole in the door for the passage of the rotor end or a drive wheel connected to the rotor. The rotor 10 or the drive wheel connected to the rotor 10 is connected directly or indirectly to a locking element 70. For example, in Fig. 1, a bolt is non-rotatably attached to the rotor end. In other applications, the rotor 10 is connected to a drive wheel, which with a corresponding gear or Toothed linkage interacts to act on a corresponding locking element. The rotor 10 is rotatably mounted on the stator 20 for this purpose. As a result of the movement of the rotor 10, the locking element 70 is moved out of the locking position into the unlocking position or back into the locking position.

In this example of FIG. 1, rotor 10 and stator 20 form a common outer surface. This locking device can for example comprise an electronic actuating device or be accommodated together with mechanical or electronic actuating elements in a housing.

The pot-like stator 20 shown in FIG. 1 is surrounded by a wall 21. This wall 21 delimits an interior space. A look into the interior is shown in FIG. 2, where the bottom surface of the stator 20 has been omitted for the sake of clarity. The underside 12 of the rotor 10 is visible. This rotor 10 is mounted rotatably about an axis of rotation 19. In this exemplary embodiment of FIG. 2, the rotational movement of the rotor 10 is limited by stops 23. These stops 23 are attached to the bottom surface of the stator 20 or are part of the stator 20. Another embodiment of the locking device shows a stator 20 without stops, see FIG. which are pressed into recesses 22, 22 'by a spring force acting radially outward. These troughs 22, 22 ‘are located in the wall 21 of the stator 20. In Fig. 2 and Fig. 3, the blocking position of the blocking members 50, 50‘ is shown. The locking members 50, 50 ‘are held in this locking position by the force of the springs 60, 60‘. The springs 60, 60 ‘are stored in a spring receptacle 16, 16‘ on the rotor 10. These

The spring receptacle 16, 16 'is open at the radially outer end, so that the front end of the spring 60, 60' rests directly on the locking member 50, 50 '. In this example, the spring receptacles 16, 16 ′ are provided in a transverse bar 15 which is located on the underside 12 of the rotor 10. In this example, a continuous crossbeam 15 is provided with its one The end for receiving the locking member 50 'extends to the wall 21 of the stator 20. At the opposite end, the cross bar 15 ends in front of the movement path of the driver 40, which can be moved along the wall 21.

The locking members 50, 50 ‘only partially immerse into the troughs 22, 22‘ on the stator 20. The greater part of the locking members 50, 50 ‘is located outside of the troughs 22, 22‘. In the case of the locking member 50 ‘, the greater part is received in a rotor-side trough 17, which is an extension of the spring receptacle 16‘. The locking member 50 also dips into such an extension of the spring receptacle 16 on the rotor 10. The middle area of the locking member 50 is located in a channel 44 of the driver 40. As can be seen in the perspective view of FIG. 6, the locking members 50, 50 'are in the form of a cylinder. The cylinder axis runs parallel to the axis of rotation 19 of the rotor 10. The locking member 50, together with the driver 40 and the actuator 30, is an element of a coupling arrangement. The second locking member 50 'is not an element of the coupling device and not a necessary part of the locking device. The diametrically opposite arrangement of a second locking member 50 ‘improves the realignment of the locking member 50 after the rotation of the rotor 10 has ended.

Fig. 6 shows the elements of the coupling arrangement, namely locking member 50, driver 40 and actuator 30 in a decoupled position. In this decoupled position, rotation of the rotor 10 is not possible. If, for example, an unauthorized person tries to rotate the locking element 70 in order to cause the locking device to open, this torque is transmitted to the rotor 10, which moves slightly in the direction of the rotational engagement, for example shown in FIG. 4. For this, a movement play of the rotor 10 is provided. As FIG. 2 shows, in contrast to the locking member 50 ', which is received in the extension 17' without play, the locking member 50 in the extension 17 is not touched by the side surfaces of this extension 17, but held in position solely by the force of the spring. The side surfaces of the extension 17 are formed into stop bevels 171 and 172 at the mouth exit of the extension 17. The orientation of these stop bevels 171, 172 is selected such that, in the event of an unauthorized rotational action on the locking element, the stop bevels 171 and 172 press the locking member 50 into the stator-side trough 22. In FIG. 4, the stop bevel 171 generates an additional force on the locking member 50 in the direction of the trough 22. As a result of the external rotational engagement on the locking element 70, the rotor 10 is rotated slightly, namely until the stop bevel 171 rests on the locking member 50. A further external action leads to the incline 171 pressing the locking member 50 in addition to the force of the spring 60 into the trough 22 due to the acting torque. If a rotary attack is attempted in the opposite direction, the run-on bevel 172 has the same effect that the locking position of the locking member 50 is retained.

To actuate the locking device, an actuator 30 is actuated manually or electronically and moved from its decoupled rest position - shown in FIG. 6 - into a coupled position - shown in FIG. 7. In the coupled position there is an operative connection between the rotor 10 and the driver 40. In the present example, the actuator 30 is mounted on the rotor 10, namely displaceably in a guide recess 14 on the upper side 11 of the rotor base. The driver-side end face 31 of the actuator 30 is located for its reliable guidance between two guide webs 13 which protrude upward from the bottom surface of the rotor 10 on its upper side 11. In another embodiment, a pivotable actuator is also possible as part of the coupling arrangement.

The decoupled position is shown in FIGS. 1, 2, 3, 6 and 8. The actuator 30 is located with its driver-side end 31 between the stops 13 in front of the driver 40. The driver 40 has opposite this driver-side end 31 a groove 47 in its upper part 41. This upper part 41 of the driver 40 extends through one Edge-side, radially extending slot 18 in the bottom surface of the rotor 10. This edge-side slot 18 can be seen in FIG. 8 and is located above the movement path of the driver 40. The longitudinal extension of the slot 18 is preferably longer than the upper part 41 of the driver 40 , this makes assembly easier. In its longitudinal extension, the driver 40 has a radial alignment that is adapted to the radius of the wall 21 of the stator 20. Only the upper part 41 extends through the slot 18 in the bottom surface of the rotor 10. Clockwise front and rear boundary surfaces 42 of the upper part 41 of the driver 40 are located within the slot 18. Below the bottom surface of the rotor 10, the driver 40 is beyond these boundary surfaces 42 extended. These end extensions on the lower part 43 of the driver 40 support its guidance during the driving movement by the rotor 10. The channel 44 for the locking member 50 is also located in the lower part 43 of the driver 40. As already described with reference to FIG. If an unauthorized attack is made on a locking element 70, the rotor 10, as also shown in FIG. 9, can rotate slightly. However, there is no coupling with the driver 40. The driver-side end face 31 of the actuator 30 is offset from the groove 47. If the actuator 30 is now legitimately actuated and, in this example, the actuator 30 is moved within the guide recess 14 on the rotor 10, the driver-side end face 31 of the actuator 31 is inserted into the groove 47 of the driver 40, see FIGS. 7 and 10. During this movement, the actuator 30, in this case with its feet 32, is guided in the guide recess 14 on the rotor. 7 clearly shows that the actuator 30 engages in the groove 47 of the driver 40. By rotating the rotor 10, the driver 40 is now also moved. With such a movement of the rotor 10, for example counterclockwise, which shows on the rear side of the rotor 12 as a clockwise movement, the stop surface 45 of the moving driver 40 strikes against the locking member 50, see Fig. 5. Since this stop surface 45 den Meets the apex of the cylindrical locking member, a radially inwardly acting force acts on the locking member 50, which the The locking member 50 pushes against the force of the spring 60 from the stator-side trough 22 in the direction of the enlargement 17 on the rotor 10. In this way, the rotation of the rotor 12 for unlocking the locking element is made possible. FIG. 5 shows the situation after the locking member 50 has been displaced from the trough 22 on the stator side. If no rotation limiters are provided for the rotor 10, it can be moved until the locking members 50, 50 'engage again in a stator-side trough 22, 22', in FIG. 5 after a rotation of 180 degrees. Further troughs 22, 22 ″ on the stator side can also be provided, which temporarily interrupt a rotor movement.

In the embodiment according to FIGS. 11 to 13, a reverse arrangement has been chosen. The locking members 50, 50 ‘are stored in their locking division in troughs 17, 17 on the rotor side and are pushed into troughs 22, 22‘ on the stator side when the rotor 10 is released and rotated. The release position of the locking members 50, 50 ‘can be seen in FIG. In the locking position of the locking device, shown in FIG. 11, the locking members 50, 50 ‘are pressed into the crescent-shaped troughs 17, 17‘ of the rotor 10 by the radially acting force of the spring 61, which is mounted on the stator 20. Here, the locking members 50, 50 ‘are added to about a third. The middle region of the locking member 50 is located in a channel 44 of the driver 40. The locking member 50, together with the driver 40 and the actuator 30, is an element of a coupling arrangement. In this embodiment, too, the second locking member 50 'is not an element of the coupling device and is not a necessary part of the locking device. The diametrically opposite arrangement of a second locking member 50 ‘improves the realignment of the locking member 50 after the rotation of the rotor 10 has ended.

Fig. 11 shows the elements of the coupling arrangement, namely the locking member 50, the driver 40 and the actuator 30 in the decoupled position. In this decoupled position, rotation of the rotor 10 is not possible. For example, if an unauthorized person tries to hit the rotor via the locking element 70 10 to open the locking device, this torque acts on the rotor 10, but this only moves slightly, as shown in FIG. 12. For this, a movement play of the rotor 10 is provided. The locking member 50 is moved together with the driver 40 and strikes when turned clockwise against a stop bevel 271 or when rotated in the opposite direction against a stop bevel 272 at the exit of the stator-side trough 22. The alignment of these stop bevels 271, 272 is chosen so that a force is generated which, in addition to the spring force of the spring 61, presses the locking member 50 into the trough 17 on the rotor side.

To actuate the locking device, an actuator 30 is manually or electronically inserted into the groove 47 on the driver 40 and moved from its decoupled rest position - shown in FIG. 11 - into a coupled position - shown in FIG. 13. In the coupled position there is an operative connection between the actuator 30 and the driver 40. In the present example, the actuator 30 is driven by a motor unit which is located outside the stator 20, which is not shown. The actuator 30 moves from the outside in a straight line into the stator 20 and inside the stator into the driver 40 and holds it in position. In another embodiment, a pivotable actuator is also possible as part of the coupling arrangement. By rotating the rotor 10, the locking member 50 is moved along with it. During such a movement of the rotor 10, the locking member 50 strikes against the stop surface 45 or 46 of the driver 40 held in position the locking member 50 presses against the force of the spring 60 from the rotor-side trough 17 in the direction of the trough 22 on the stator 20. Thereafter, the rotation of the rotor 12 to unlock the locking element is possible. 13 shows the situation after the locking member 50 has been displaced into the trough 22 on the stator side. If no rotation limiter is provided for the rotor 10, it can be moved as far as until the locking members 50, 50 'engage again in a stator-side trough 22, 22', in FIG. 13 after a rotation of 180 degrees. Further troughs 22, 22 ″ on the stator side can also be provided, which temporarily interrupt a rotor movement.

An essential element of this new locking device is the coupling arrangement comprising the actuator, the driver and the locking member, which, when properly actuated, allow the rotor 10 to rotate after the locking member 50 is moved from its locking position to a release position at the beginning of the rotary movement of the rotor 10. On the other hand, the locking device offers a high level of security against theft, since unauthorized attacks on the locking element do not lead to unlocking, since high torques can be absorbed by this new locking device. A high security standard is achieved with this locking device.

List of reference symbols

10 Handle, rotor 11 top

12 bottom

13 guide bars

14 guide recess

15 Crossbar 16, 16 ‘spring seat 17, 17‘ recess

171 stop bevel

172 Stop bevel 18 Edge-side slot for 40 181 end of slot, clockwise at the front

182 End of the slot, clockwise at the back

19 axis of rotation

20 housing, stator 21 wall 22, 22 ‘rim side trough

23 stops to limit rotation

24 fasteners

25 center hole 26, 26 ‘spring stop

271, 272 stop bevel

30 actuator

31 driver-side face 32 feet 40 drivers

41 top

42 boundary surface (movement within 18)

43 lower part 44 duct

45 stop surface

46 stop surface

47 Groove 50, 50 ‘locking link

60, 60 ‘spring

61 spring

70 locking element

Claims

Expectations

Locking device for locking doors on cupboards, boxes or compartments,

- With a stator (20) for attachment to the door, the stator (20) forming a pot-shaped housing shell, namely a base that can be placed on the door and a wall (21) surrounding the base,

- With a rotor (10) which is rotatably mounted on the stator (20) and can be connected to a locking element (70) at the door-side end in order to move the latter from a locking position into an unlocking position by moving the rotor,

- With a locking member (50) which can be moved between a locking position and a release position, the movement of the rotor (10) being possible only in the release position of the locking member (50), characterized in that,

- That a coupling arrangement (30, 40, 50) is present which prevents unauthorized rotation of the rotor (10),

- That the coupling arrangement (30, 40, 50) comprises a manually or electronically movable actuator (30), a driver (40) interacting with the actuator (30) and a locking element (50),

- That the locking member (50) has the shape of a cylinder and the cylinder axis runs parallel to the rotor axis (19), the locking member (50) in its locking position in a trough (17) on the outside of the rotor (10) or in a trough (22) is immersed on the inside of the wall (21) of the stator (20) and is held in this locking position by spring force,

- The actuator (30) can be coupled to the driver (40) to release the movement of the rotor (10) and the locking member (50) can be displaced into a release position against the spring force from the trough (17, 22). 2 Locking device according to claim 1, characterized in that in the release position the locking member (50) against the force of a radially acting spring (60, 61) from the rotor-side trough (17) into a stator-side trough (22) or from the stator-side trough ( 22) has been moved into a trough (17) on the rotor side.

3. Locking device according to claim 1 or 2, characterized in that the path of movement of the driver (40) runs along the inside of the wall (21) of the stator (20) and is curved in the longitudinal extent adapted to its path of movement.

4. Locking device according to claim 3, characterized in that the driver (40) has a channel (44) running in the radial direction in the width of the locking member (50), the side surfaces of the channel (44) being designed as stop surfaces (45, 46) which cause a displacement of the locking member (50) when the driver (40) or the rotor (10) moves.

5. Locking device according to one of claims 1 to 4, characterized in that the stator-side trough (22) or rotor-side trough (17) opposite the locking position of the locking member (50) has stop bevels (271, 272; 171, 172) on both sides at the trough outlet, the spacing of the stop bevels (271, 272; 171, 172) allowing the rotor (10) to move freely.

6. Locking device according to one of claims 1 to 5, characterized in that the driver (40) has a groove (47) for engaging the actuator (30). 7. Locking device according to one of claims 1 to 6, characterized in that the actuator (30) is movably mounted outside the rotor (10) and to release the movement of the rotor (10) with can be coupled to the driver (40), the driver (40) being held in its position in the coupled position and the locking member (50) from the rotor-side trough (17) into the stator-side trough (22) by a rotary movement of the rotor (10) ) can be moved.

Locking device according to Claim 7, characterized in that in the decoupled position the driver (40) can be moved until the locking member (50) strikes a stop surface (271, 272) of the stator-side trough (22).

Locking device according to claim 7 or 8, characterized in that a spring (61) acting on the locking member (50) is mounted on the stator (20), the stator (20) preferably having corresponding spring stops (26, 26 ‘).

Locking device according to one of Claims 1 to 6, characterized in that the actuator (30) is movably mounted on the rotor (10) and can be coupled to the driver (40) to release the movement of the rotor (10), the driver (40) ) is movable in the coupled position with the rotor (10) and the locking member (50) can be displaced from the trough (22) on the stator side into the trough (17) on the rotor side by a rotary movement of the rotor (10).

Locking device according to claim 10, characterized in that in the decoupled position the rotor (10) can be moved until the locking member (50) strikes a stop surface (171, 172) of the rotor-side trough (17).

Locking device according to claim 10 or 11, characterized in that the actuator (30) is mounted on the rotor (10) so as to be displaceable in the radial direction, the actuator (30) being movably supported in a guide recess (14) of the rotor (10) and guide webs (13) projecting from the top (11) of the bottom surface of the rotor (10) are preferably provided for better guidance of the actuator (30). 13. Locking device according to one of claims 10 to 12, characterized in that the rotor (10) has a bottom surface, on the underside (12) of which there is a radially aligned crossbar (15) which extends into the interior of the pot-like stator (20) protrudes and at its end facing the wall (21) of the stator (20) trough (17, 17 ') for receiving the locking member (50, 50') when the rotor moves

(10) owns.

14. Locking device according to claim 13, characterized in that one end of the cross bar (15) of the rotor (10) extends to the path of movement of the driver (40) and the rotor (10) has an edge-side slot (18) on its bottom surface, which runs along the path of movement of the driver (40) and which the driver (40) reaches through from below with its upper part (41).

15. Locking device according to claim 14, characterized in that for better guidance of the driver, the lower part (43) of the driver (40) is extended and extends along the path of movement over a length greater than the length of the edge-side slot (18) of the rotor (10 ) extends.

16. Locking device according to one of claims 13 to 15, characterized in that a spring (60) acting on the locking member (50) is mounted in a spring receptacle (16) on the crossbar (15). 17. Locking device according to one of claims 1 to 16, characterized in that two locking members (50, 50 ') are present, which are in the locked position in diametrically opposite recesses (17, 17 '; 22, 22').

18. Locking device according to one of claims 1 to 17, characterized in that more than two troughs (17, 17 ‘; 22, 22‘) on the rotor

(10) or on the stator (20).

19. Locking device according to one of claims 1 to 18, characterized in that stops (23) for limiting rotation are arranged on the stator (20).

20. Locking device according to one of claims 1 to 19, characterized in that the outer surface of the rotor (10) is flush with the outer surface of the stator (20).

21. Locking device according to one of claims 1 to 20, characterized in that the rotor (10) is connected directly to the locking element (70), for example with a bolt, or that the rotor (10) is indirectly connected to the locking element (70) is, for example via a drive wheel.