DRIVE FOR A MACHINE, TORQUE MOTOR, CLUTCH UNIT, DEVICE FOR PROCESSING MATERIALS, AND USE OF A TORQUE MOTOR

Abstract

The invention relates to a drive (1; 101) of a machine (2) comprising a drive motor (3) for driving a rotatable shaft (5) of the machine (2) around a shaft axis of rotation (4), and comprising a clutch unit (10) in operative connection with the drive motor (3) and the shaft (5) for compensating for a relative movement (11) between the shaft (5) and the drive motor (3). The drive motor (3) has a rotor part (35) surrounding the shaft (5) on which a clutch rotation part (18A) of the clutch system (10) is mounted to be rotatable around the shaft axis of rotation (4), wherein the rotor part (35) is arranged at least partially engaging in the clutch rotation part (18A) in such a way that the clutch rotation part (18A) is mounted radially movably on the rotor part (35).

Claims

1. A drive of a machine having a shaft rotatable about a shaft rotation axis, the drive comprising: a drive motor having a rotor surrounding the shaft and rotatable about a rotor rotation axis; a coupling operatively connected to the drive motor and to the shaft for compensating for relative movement between the shaft and the drive motor the coupling having a rotatable coupling part mounted for rotation about the shaft rotation axis, the rotor at least partially engaging in the rotatable coupling part, and the rotatable coupling part being radially movable on the rotor.

2. The drive according to claim 1, wherein the rotatable coupling part and the rotor together form a connection that carries the rotatable coupling part so that it is radially movable but rotationally fixed directly on the rotor.

3. The drive according to claim 2, wherein the rotor has at least one coupling dog engaging axially in a connecting slot formed in the rotatable coupling part.

4. The drive according to claim 3, wherein the at least one coupling dog projects axially beyond a front axial end face of the rotor.

5. The drive according to claim 3, wherein the at least one coupling dog is spaced radially from the shaft rotation axis.

6. The drive according to claim 1, wherein the rotatable coupling part is operatively connected to a coupling hub of the coupling mounted on the shaft so that it is radially movable.

7. The drive according to claim 6, wherein the rotatable coupling part and the coupling hub are operatively connected to one another by coupling lugs engaging in connecting slots.

8. The drive according to claim 1, wherein both the drive motor and the coupling are arrayed around the shaft in such a way that end of the shaft are exposed.

9. The drive according to claim 1, wherein the rotatable coupling part is an Oldham disk of an Oldham coupling.

10. In a torque motor having a stator and a rotor that can rotate about the rotor rotation axis for driving a shaft, the improvement wherein the rotor comprises a first connection part of a connection of a coupling operatively connecting the torque motor and the shaft.

11. The torque motor according to claim 10, wherein the first connection part is a coupling flange of the coupling.

12. The torque motor according to claim 10, wherein the rotor is unitarily formed with the first connection part.

13. The torque motor according to claim 10, wherein the first connection part comprises at least one axial cam or an axial cam groove.

14. The torque motor according to claim 10, wherein the connection has an additional connection part that is radially displaceable with respect to the first connection part.

15. The torque motor according to claim 14, wherein the additional connection part comprises an Oldham disk of an Oldham coupling.

16. A coupling having a coupling hub with a coupling flange and having a coupling disk that can be displaced radially with respect to the coupling flange and having a coupling disk that is radially displaceable with respect to the coupling flange in which the coupling hub, the coupling flange and the coupling disk are operatively connected to one another in such a way that the coupling disk is displaceable radially with respect to the coupling flange, wherein the coupling flange comprises a rotor, in particular a rotor ring element of the rotor of a torque motor.

17. The coupling according to claim 16, wherein the coupling flange forms a bearing seat of a roller bearing or slide bearing of the torque motor that secures the coupling flange rotatably on a housing of the torque motor

18. The coupling according to claim 16, wherein wherein the coupling flange comprises at least one axial cam and/or at least one axial cam groove.

19. The coupling according to claim 16, wherein the coupling disk comprises an Oldham disk of an Oldham coupling.

20. (canceled)

21. A use of a rotary body of a torque motor driving a shaft as a functional component of a coupling for compensating for a radial movement between the torque motor and the shaft.

Description

[0058] In the drawings:

[0059] FIG. 1 is a schematic partial section of a connection between a drive motor and a coupling of the drive according to the invention;

[0060] FIG. 2 is a schematic view of the coupling of the connection shown in FIG. 1;

[0061] FIG. 3 is a schematic partial section of an alternative connection between a drive motor and a coupling of the drive according to the invention;

[0062] FIG. 4 is a schematic perspective view of a coupling for compensating for radial movement between a coupling hub and coupling flange where the coupling flange is a rotor of a drive motor; and

[0063] FIG. 5 is another schematic perspective view of the coupling shown in FIG. 4.

[0064] The drive 1 shown partially in FIGS. 1 and 2 works with a machine 2 in this embodiment and has an electric drive motor 3 for rotating a shaft 5 of the machine 2, the shaft being rotatable about an axis 4 and serving to drive an unillustrated tool of the machine 2.

[0065] In addition, the drive 1 has a coupling 10 that operatively connects the electric drive motor 3 to the shaft 5 so that the shaft 5 can be rotated about the shaft rotation axis 4 in rotation directions 6.

[0066] The coupling 10 can in particular compensate for radial movement 11 between the shaft 5 and the electric drive motor 3, this radial movement 11 being relative to the shaft rotation axis 4 itself extending in an axial direction 12. This coupling 10 can therefore compensate in particular for wear-induced play of a slide bearing 7 of the rotary shaft 5.

[0067] The coupling 10 has a rotation axis 13 that is coaxial with the shaft rotation axis 4 at least with a shaft 5 that does not have radial play.

[0068] The coupling 10 here follows the design principle of an Oldham coupling that is already known in principle from the prior art.

[0069] To this end, the coupling 10 comprises a hub 14 that can rotate about the rotation axis 13 and is fixed in a hub seat 16 of the shaft 5 by a shaft-hub connector clamp 15.

[0070] In addition, the coupling 10 also has a coupling flange 17 that rotationally fixes the coupling 10 to the electric drive motor 3.

[0071] Furthermore, the coupling 10 has a coupling disk 18 formed with an array connecting slots 19 (labeled with numbers only as an example) are incorporated.

[0072] Since the coupling 10 is designed essentially according to the design principle of an Oldham coupling, the coupling disk 18 therefore in the broadest sense also constitutes an Oldham coupling disk and is therefore angularly true.

[0073] The coupling disk 18 is a rotatable coupling part 18A here that can execute a radial movement 11.

[0074] The coupling hub 14 has two coupling lugs 20 and 21 diametrally opposite one another, engaging in respective connecting slots 19A and 19B of the connecting slots 19 of the coupling disk 18 so that the coupling hub 14 and the coupling disk 18 are connected to one another in a rotationally fixed manner in the rotation directions 6.

[0075] The two coupling lugs 20 and 21 diametrally opposite one another on the coupling hub 14 are fixed on two respective oppositely directed arms 23 (numbers included only as an example, see FIG. 2).

[0076] Thus the coupling hub 14 and the coupling disk 18 are connected to one another by a simple design in a rotationally fixed manner.

[0077] The electric drive motor 3 is an electrically operated torque-generating motor 25 in the form of a torque motor 26.

[0078] The electric drive motor 3 has a housing 27 that secures it to a frame 29 of the machine 2 by suitable screws 28.

[0079] In addition, the electric drive motor 3 has a stator 30 a rotationally fixed in an outer tubular part 31 of the housing 27 and thus also coaxially surrounds the rotation axis 13.

[0080] Furthermore, the electric drive motor 3 has a rotor 35 that is rotatably mounted on rotor bearing elements 36 and 37 in an inner tubular part 38 of the housing 27 and thus also coaxially surrounds the rotation axis 13. Permanent magnets 40 are carried on the outer surface 39 of the rotor 35 facing the stator 30.

[0081] The rotor 35 forms two coupling dogs 41 and 42 in the form of axial extension that project axially beyond an annular body 43 of the rotor 35, more specifically beyond a front axial end face 44 of the rotor 35 and that thus engage in two connecting slots 19C and 19D of the connecting slots 19 formed on the coupling disk 18.

[0082] The rotor 35 is thus arranged at least partially so that it engages in the rotatable coupling part 18A and the rotatable coupling part 18A is supported in a radially movable manner relative to the rotation axis 13 but is rotationally fixed to the rotor 35.

[0083] To this extent, the coupling flange 17 and the rotor 35 are identical.

[0084] These two connecting slots 19C and 19D are more elongated than the coupling dogs 41 and 42 and/or the axial cams of the rotor 35, and the longitudinal dimension of the two connecting slots 19C and 19D extends from radially further inward to radially further outward.

[0085] In this way, the coupling dogs 41 and 42 and/or the axial cams of the rotor 35 arranged in the two connecting slots 19C and 19D allow radial movement 11 of the coupling disk 18 with respect to the rotor 35, so that a radial shaft offset of the shaft 5 but also an axial shaft offset of the shaft 5 can be compensated with no problem.

[0086] The coupling disk 18 and the rotor 35 thus together form a connection 45 that supports the coupling disk 18 and the rotor 35 so that they are radially movable and rotationally fixed relative to one another.

[0087] To this extent, the rotor 35 and/or the coupling flange 17 in this illustrated embodiment form(s) a first connection part 45A of the connection 45, on which another connection part 45B is mounted in a radially displaceable manner, and this additional connection part 45B is the coupling disk 18.

[0088] At any rate, the coupling flange 17 has a bearing seat 46 of a roller bearing or slide bearing of the torque motor 25 that rotationally connects the coupling flange 17 to the housing 27 and/or inside the housing 27 of the torque motor 25.

[0089] It is especially advantageous that in the present case both the drive motor 3 and the coupling 10 are arranged around the shaft axis 4 in such a way that the two shaft end 50 and 51 of the shaft 5 are exposed, so that additional components or component groups (not shown) can be secured to the shaft 5.

[0090] For example, this would yield the possibility of arranging a rotary encoder (not shown) on the second shaft end 51. However, it is better to mount a rotary encoder 52 in this regard as a strip element 53 on the rotor 35 because, in this way, the rotary encoder 52 can be fixed on the rotor and the rotary encoder 52 is in direct proximity to a housing-mounted scanner 54. In this way, the drive motor 3 of the respective components such as the rotor-bound rotary encoder 52 and the housing-bound scanner 54 can be set up in close proximity to one another so that their interaction can be improved. In addition, this permits implementation of an even more compact design, in particular with respect to an electronic controller (not shown here) of the drive motor 3.

[0091] The machine 2 may be a device with an eccentric press where the shaft 5 is an eccentric shaft accordingly (not yet assigned a number) that drives a press tool, for example, directly or indirectly. A direct drive may be understood, for example, to mean that the tool is mounted directly on the axle. This is the case with a roller, for example. An indirect drive may be understood to mean that elements such as gears may be between the driven shaft and the tool, for example.

[0092] The additional drive 101 shown in FIG. 3 is essentially of the same design as the drive 1 shown in FIGS. 1 and 2. To this extent, the differences between the drives 1 and 101 are explained only briefly below while using the reference numerals. With regard to the design and functioning of the additional drive 101, reference is made to the preceding description to avoid repetition.

[0093] The additional drive 101 (FIG. 3) differs from the drive 1 (FIGS. 1 and 2) only in that the stator 30 is mounted on the outer tubular housing part 31 and a rotor 35 accordingly is mounted on the inner tubular housing part 38.

[0094] The additional coupling 210 shown in FIGS. 4 and 5 for operative connection of a drive motor of a drive to a shaft has a coupling hub 214, a coupling flange 217 and a coupling disk 218 displaceable radially with respect to the coupling flange 217, and the coupling flange 217 also forms a rotor 235 of the drive motor, so that this drive motor with its rotor 235 is an integral component of the coupling 210.

[0095] The rotor 235 and the thus also the coupling flange 217 have a rotor ring element 260, on whose side surface 261 a plurality of permanent magnets 240 are mounted, these permanent magnets interacting with the unillustrated stator of the drive motor.

[0096] The rotor 235 and/or the rotor ring element 260 in this regard has/have two cam pairs 262 and 263, each having two coupling dogs 241 and/or 242 (numbers shown only as an example). The two coupling dogs 241 and 242 each have a longitudinal dimension running parallel to one another so that on the whole radial movement is possible between the rotor ring element 260 and the coupling disk 218.

[0097] The coupling disk 218 has a plurality of circular material recesses 264 (number shown only as an example), in which suitably designed sliding bushings 265 are held as elongated connecting slots 219 at one end (numbers again shown only as an example), so that the coupling dogs 241 and/or 242 is/are mounted so that they are radially movable in these friction bushings 265. On the other hand, additional friction bushings 266 are held in these circular material recesses 264 supporting connecting link lugs 220 and/or 221 of the coupling hub 214.

[0098] At this point, it should be stated explicitly that the features of the approaches described above and/or in the claims and/or illustrated in the figures may optionally also be combined in order to be able to implement and/or achieve the features, effects and advantages described here in a cumulative manner accordingly.

[0099] It is self-evident that the illustrated embodiments explained above are only a first embodiment of the invention. To this extent, the embodiment of the invention is not limited to these illustrated embodiments.

[0100] All the features disclosed in the application documents are herewith claimed as essential to the invention if they are novel individually or in any combination in comparison with the prior art.

LIST OF REFERENCE NUMERALS

[0101] 1 Drive

[0102] 2 Machine

[0103] 3 Drive motor

[0104] 4 Shaft rotation axis

[0105] 5 Shaft

[0106] 6 Directions of rotation

[0107] 7 Slide bearing

[0108] 10 Coupling

[0109] 11 Radial movement

[0110] 12 Axial direction

[0111] 13 Rotation axis

[0112] 14 Coupling hub

[0113] 15 Shaft-hub connection clamping set

[0114] 16 Hub seat

[0115] 17 Coupling flange

[0116] 18 Coupling disk

[0117] 18A Rotatable coupling part

[0118] 19 Connecting slot

[0119] 19A First connecting slot

[0120] 19B Second connecting slot

[0121] 19C Third connecting slot

[0122] 19D Fourth connecting slot

[0123] 20 First coupling lug

[0124] 21 Second coupling lug

[0125] 23 Arms

[0126] 25 Torque motor

[0127] 26 Torque motor

[0128] 27 Housing

[0129] 28 Screw means

[0130] 29 Frame

[0131] 30 Stator

[0132] 31 Outer tubular housing part

[0133] 35 Rotor

[0134] 36 First rotor bearing element

[0135] 37 Second rotor bearing element

[0136] 38 Inner tubular housing part

[0137] 39 Facing side

[0138] 40 Permanent magnets

[0139] 41 First coupling dog

[0140] 42 Second coupling dog

[0141] 43 Annular body

[0142] 44 Front axial end face

[0143] 45 Connection

[0144] 45A First connection part

[0145] 45B Additional connection part bushings

[0146] 46 Bearing seat

[0147] 50 First shaft end

[0148] 51 Second shaft end

[0149] 52 Rotary encoder

[0150] 53 Band element

[0151] 54 Scanning element

[0152] 101 Additional drive

[0153] 210 Additional coupling

[0154] 214 Coupling hub

[0155] 217 Coupling flange

[0156] 218 Coupling disk

[0157] 219 Connecting slot

[0158] 220 First coupling lugs

[0159] 221 Second coupling lugs

[0160] 235 Rotor

[0161] 240 Permanent magnets

[0162] 241 First coupling dog

[0163] 242 Second coupling dog

[0164] 260 Rotor ring element

[0165] 261 Lateral surface

[0166] 262 First cam pair

[0167] 263 Second cam pair

[0168] 264 Material recesses

[0169] 265 Friction bushings

[0170] 266 Additional friction bushings