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EP3781735B1 - Dispositif d'entraînement pour un métier à tisser avec dispositif d'assistance - Google Patents

Dispositif d'entraînement pour un métier à tisser avec dispositif d'assistance Download PDF

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Publication number
EP3781735B1
EP3781735B1 EP18718797.6A EP18718797A EP3781735B1 EP 3781735 B1 EP3781735 B1 EP 3781735B1 EP 18718797 A EP18718797 A EP 18718797A EP 3781735 B1 EP3781735 B1 EP 3781735B1
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EP
European Patent Office
Prior art keywords
magnet arrangement
drive
drive shaft
driving device
magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18718797.6A
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German (de)
English (en)
Other versions
EP3781735C0 (fr
EP3781735A1 (fr
Inventor
Kristof Roelstraete
Emmanuel DELBOO
Dimitri COEMELCK
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Picanol NV
Original Assignee
Picanol NV
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Publication date
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Publication of EP3781735A1 publication Critical patent/EP3781735A1/fr
Application granted granted Critical
Publication of EP3781735B1 publication Critical patent/EP3781735B1/fr
Publication of EP3781735C0 publication Critical patent/EP3781735C0/fr
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/14—Features common to dobbies of different types
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/02—General arrangements of driving mechanism

Definitions

  • the invention relates to a driving device for a weaving machine, the driving device comprising a drive shaft with a drive axis, at least one actuator exerting a drive torque on the drive shaft to rotate the drive shaft about the drive axis, and an assisting device.
  • the invention further relates to an assembly group of a weaving machine, to a weaving machine comprising a driving device, and to a method for driving a drive shaft in a weaving machine.
  • a weaving machine comprises several driving devices, for example a harness drive, a gripper drive, a sley drive, a selvage device drive, and other drives.
  • the driving device for example comprises a drive shaft to which components or elements to be driven are coupled.
  • the components or elements are referred to as driven components or driven elements.
  • driven components are driven to carry out non-continuous motions: for example a sley unit, which is moved to-and-fro, healds or other shed forming means, which are moved up and down, and grippers, which are moved into-and-out of the shed.
  • the drive shaft of such a driving device in one embodiment rotates to-and-fro. This movement is also referred to as oscillation. In other embodiments, the drive shaft is rotated through 360°, wherein in normal operation the drive shaft is rotated continuously or step-wise in either one of the two directions of rotation. This movement is also referred to as complete rotation, i.e. over a complete revolution.
  • the driving device comprises an actuator exerting a drive torque on the drive shaft for rotating the drive shaft.
  • the actuator is coupled directly or via a gearing system to the drive shaft.
  • Several driving devices in one embodiment are provided with a common actuator. In other embodiments, each driving device is provided with a separate actuator. Due to the non-continuous motion, for example to-and-fro motion of components driven by a drive shaft of the driving device, a required drive torque varies with an angular position of the drive shaft.
  • WO 2005/010257 A1 discloses a driving device comprising a drive source, an electromagnetic energy accumulator, which is assigned to the driven component and/or to the drive source and which is provided for accumulating potential energy during at least one portion of the to-and-fro motion of the driven component, and a control device for controlling at least the energy accumulator and/or the drive source according to measured and/or predetermined parameters for the course of motion of the driven component.
  • the electromagnetic accumulator comprises a magnetic pole pair, wherein at least one of the magnetic poles is an electromagnetic pole.
  • the natural frequency of the to-and-fro motion depends on the current applied to the electromagnetic accumulator and to the mass of the driven component.
  • the drive source only provides energy to compensate for friction losses.
  • the drive source is operated for causing a forced oscillation of the driven component.
  • the invention offers the advantage that a passive assisting device, which does not require any energy supply, exerts an assisting drive torque in at least one angular position on the drive shaft, so that the drive torque, which has to be exerted by the actuator, can have less variation.
  • the person skilled in the art can arrange the assisting device in a suitable position, such that due to the assisting drive torque provided by the passive assisting device, the overall energy consumption is reduced.
  • a driving device comprising a drive shaft with a drive axis, at least one actuator exerting a drive torque on the drive shaft to rotate the drive shaft about the drive axis, wherein a required drive torque varies with an angular position of the drive shaft, and a passive assisting device with a first magnet arrangement comprising at least one first permanent magnet and a second magnet arrangement comprising at least one second permanent magnet, wherein the first magnet arrangement and the second magnet arrangement are displaced relative to one another with the rotation of the drive shaft, and wherein in at least one angular position of the drive shaft an attractive and/or repulsive force between the first magnet arrangement and the second magnet arrangement exerts an assisting drive torque on the drive shaft, wherein the drive torque of the at least one actuator and the assisting drive torque of the assisting device provide a resulting drive torque on the drive shaft.
  • the expression "passive assisting device” defines a device, which for its operation does not require an external energy supply.
  • an actuator requires an external energy supply.
  • the passive assisting device with permanent magnets is also referred to as magnetic spring device.
  • an assisting drive torque is provided in at least one angular position.
  • the assisting drive torque can act in the same direction as the drive torque exerted by the actuator or in an opposite direction.
  • the drive torque to be provided by the at least one actuator in such an angular position for causing a desired movement of the drive shaft is different to the drive torque to be provided in the absence of the assisting drive torque.
  • the first magnet arrangement and the second magnet arrangement are arranged such that an attractive force is exerted on the drive shaft when the drive shaft approaches a first angular position.
  • this attractive force will exert a torque on the drive shaft in a desired movement direction of the drive shaft, also referred to as positive torque, when the drive shaft approaches the first angular position.
  • this attractive force will further exert a torque on the drive shaft directed opposite to the desired movement direction of the drive shaft, also referred to as negative torque, when the drive shaft departs from the first angular position.
  • a positive torque is exerted in an angular position requiring a higher drive torque for moving the driven component and/or a negative torque is exerted in an angular position requiring a lower drive torque for moving the driven component.
  • the drive torque to be exerted by the actuator can have less variation than in devices without passive assisting devices, thereby, an energy consumption of the actuator and, thus, the driving device can be reduced.
  • the first magnet arrangement and the second magnet arrangement are in embodiments of the invention configured, such that in all angular positions an assisting drive torque is lower than a maximum required drive torque for causing a desired rotation of the drive shaft.
  • the first magnet arrangement and the second magnet arrangement are configured, such that a maximum assisting drive torque is less than 40% of the maximum required drive torque, or even less than 20% of the maximum required drive torque.
  • a speed of the drive shaft can be influenced to have less variations compared to driving devices not equipped with an assisting device.
  • the first magnet arrangement and the second magnet arrangement are displaced relative to one another.
  • the first magnet arrangement comprises at least one first magnetic pole and the second magnet arrangement comprises at least one second magnetic pole, which is of opposite polarity to the at least one first magnetic pole, wherein within a movement range of the drive shaft the first magnet arrangement and the second magnet arrangement are displaced relative to one another to form at least one stable magnetic equilibrium point, wherein by means of the at least one actuator the first magnet arrangement and the second magnet arrangement are moved relative to each other out of the at least one stable magnetic equilibrium point.
  • a stable magnetic equilibrium point is referred to as a position, in which magnetic poles of opposite polarity are approached as far as possible.
  • the first magnet arrangement and the second magnet arrangement may be placed to form at least one unstable magnetic equilibrium point, in which forces exerted by the passive assistance device are balanced, i.e. the assisting drive torque in this position is zero. If by means of the at least one actuator the first magnet arrangement and the second magnet arrangement are moved relative to each other out of the at least one unstable magnetic equilibrium point, immediately after the unstable magnetic equilibrium point has been left, the passive assistance device exerts an accelerating assisting drive torque.
  • a magnetic flux field is generated between the first magnet arrangement and the second magnet arrangement, wherein in preferred embodiments, the first magnet arrangement and the second magnet arrangement are displaced relative to one another in a direction transverse to the magnetic flux field generated.
  • the first magnet arrangement is arranged on the drive shaft to rotate with the drive shaft and the second magnet arrangement is arranged at the circumference of the drive shaft in a non-rotating position with respect to the drive axis.
  • the second magnet arrangement comprising at least one second permanent magnet is not rotated with the drive shaft about the drive axis, but remains fixed in position with respect to the drive axis upon rotation of the drive shaft.
  • the assisting device is a passive assisting device, wherein forces or torques applied depend on the number, magnitude, construction and arrangement of the first magnet arrangement and the second magnet arrangement.
  • the second magnet arrangement is mounted moveable with respect to the drive shaft along the drive axis. Hence, by movement of the second magnet arrangement, the magnitude or strength of the force or torque applied by the passive assisting device can be adjusted.
  • first magnet arrangement and the second magnet arrangement are chosen by the person skilled in the art to match the requirement of the associated device.
  • at least one of the first magnet arrangement and the second magnet arrangement comprises at least two effective magnetic poles. It is generally known to the person skilled in the art that permanent magnets are not monopoles. However, permanent magnets can be arranged so that only one of the magnetic poles is effective.
  • the first magnet arrangement comprises at least two effective magnetic poles, wherein at least two magnetic poles of the first magnet arrangement differ in at least one of a polarity, a magnitude, a size, and/or gaps between adjacent magnetic poles differ in size.
  • the second magnet arrangement comprises at least two effective magnetic poles, wherein at least two magnetic poles of the second magnet arrangement differ in at least one of a polarity, a magnitude, a size, and/or in that gaps between adjacent magnetic poles differ in size.
  • the actuator in one embodiment is a pneumatic or hydraulic actuator.
  • the at least one actuator is an electric motor.
  • the driving device is for example selected from the group comprising at least a harness drive, a gripper drive, a sley drive, a selvage drive.
  • the driving device in one embodiment is adapted for driving two or more driven components that differ in type, for example a gripper and a reed of a weaving machine.
  • an assembly group of a weaving machine comprising a driving device and a driven component is provided.
  • a weaving machine comprising a driving device.
  • the drive shaft is drivingly connectable to at least one driven component of the weaving machine to move the at least one driven component to-and-fro along a movement path and/or to rotate at least one driven component about an axis along a circumferential movement path upon rotation of the drive shaft.
  • the driven component for example is a heald frame moved up-and-down with the movement of the drive shaft of the driving device, a gripper moved by a rapier, which rapier is drivingly connected to the drive shaft of the driving device, a reed mounted on a sley beam or any other element of a weaving machine.
  • the movement path along which the driven component performs a to-and-fro movement can be either linear, for example a to-and-fro movement of a gripper or a heald frame, or along a curved path, for example the to-and-fro movement of a reed.
  • the driven element is directly connected to the drive shaft.
  • the weaving machine comprises at least one transmission element, wherein the drive shaft is drivingly connectable to the at least one driven component via at least one transmission element.
  • the at least one driven component and/or the at least one transmission element exert or exerts a reaction torque on the drive shaft, wherein the first magnet arrangement and the second magnet arrangement are arranged such that at least in one angular position of the drive shaft the assisting drive torque exerted by the first magnet arrangement and the second magnet arrangement is counteractive to the reaction torque.
  • the passive assisting device in angular positions of the drive shaft, in which the reaction torque causes an acceleration of the drive shaft, the passive assisting device is used for braking the drive shaft.
  • the passive assisting device is used for accelerating the drive shaft. This offers the advantage that this allows to limit the angular speed variations of the drive shaft, in case the drive shaft is rotated through 360°.
  • the first magnet arrangement is arranged on the driven component and/or a transmission element to move with the driven component and/or the transmission
  • the second magnet arrangement is arranged in a stationary position along a movement path of the driven component and/or the transmission element.
  • the first magnet arrangement is arranged on a heald frame to move up-and-down with the heald frame, and/or on a transmission rod for a heald frame, to move to-and-fro with the transmission rod.
  • a method for driving a drive shaft in a weaving machine wherein by means of at least one actuator a drive torque is exerted on the drive shaft to rotate the drive shaft about a drive axis, wherein a required drive torque varies with an angular position of the drive shaft, and wherein in at least one angular position of the drive shaft an assisting drive torque is exerted on the drive shaft, wherein the drive torque of the at least one actuator and the assisting drive torque of the assisting device provide a resulting drive torque, wherein the assisting drive torque is exerted by an attractive and/or repulsive force between a first magnet arrangement comprising at least one first permanent magnet and a second magnet arrangement comprising at least one second permanent magnet, wherein the first magnet arrangement and the second magnet arrangement are displaced relative to one another with the rotation of the drive shaft.
  • Fig. 1 shows a driving device, namely a harness drive 1, of a weaving machine according to an embodiment of the invention.
  • Figs. 2 to 5 show details of the harness drive 1 of Fig. 1 .
  • Such a harness drive 1 is shown in WO 2017032556 A1 of the applicant, which is herewith incorporated by reference.
  • a first driven component in the form of a heald frame 3 is coupled to the harness drive 1.
  • the harness drive 1 shown in Figs. 1 to 5 is part of a shed forming device, which comprises a number of harness drives 1 and an equal number of heald frames 3, wherein each heald frame 3 is driven by an associated harness drive 1.
  • the shown harness drive 1 for driving the heald frame 3 comprises a drive shaft 5 rotating about a drive axis 7, a first transmission element in the form of a crank 9 (see Figs. 2 and 3 ) mounted to the drive shaft 5, a second transmission element in the form of a coupling rod 11, and a swivel lever 13.
  • the swivel lever 13 is swivelable to-and-fro about a swivel axis 15 between an upper position and a lower position.
  • the harness drive 1 further comprises a second swivel lever 17, swivelable to-and-fro about a second swivel axis 18 between an upper position and a lower position.
  • the second swivel lever 17 is connected to the swivel lever 13 by means of a transmission element in the form of a coupling rod 19 and driven by the swivel lever 13 to conjointly move with the swivel lever 13.
  • the heald frame 3 is connected to each of the swivel levers 13, 17 by means of a transmission element in the form of a connecting assembly comprising a coupling element 20 and a lifting rod 21.
  • the first swivel lever 13 and the second swivel lever 17 are also transmission elements.
  • the drive axis 5 and the swivel axis 15, 18 extend in parallel.
  • the coupling rod 11 of the harness drive 1 is linked to the crank 9 by a first hinged joint 23 (see Figs. 2 and 3 ), which first hinged joint 23 is eccentric to the drive axis 7. Further, the coupling rod 11 is linked to a connecting element 25 by a second hinged joint 27, which connecting element 25 is attached to the swivel lever 13.
  • the drive shaft 5 is mounted rotatably about the drive axis 7 in a fixed position in a housing 29.
  • the housing 29 in use is arranged stationary at a weaving machine, for example mounted to a frame (not shown) of the weaving machine.
  • the driving device 1 comprises an actuator 31, which in the embodiment shown is part of a motor unit 32 (not shown in detail).
  • one actuator 31 is assigned to each harness drive 1 for driving the drive shaft 5 to rotate about the drive axis 7.
  • several harness drives share one common actuator.
  • the harness drive 1 further comprises a passive assisting device 33 (see Figs. 2 to 5 ) with a first magnet arrangement 35 and a second magnet arrangement 37.
  • the first magnet arrangement 35 is arranged on the drive shaft 5 to rotate with the drive shaft 5.
  • the first magnet arrangement 35 comprises several permanent magnets 135, 136 with four magnetic poles, which are either a magnetic north pole or a magnetic south pole.
  • the person skilled in the art will understand that all magnetic north poles and magnetic south poles can be swapped without any technical effect. In the figures, opposite poles are indicated by different patterns.
  • the second magnet arrangement 37 is mounted to the housing 29 in a non-rotating or rotationally fixed position with respect to the drive axis 7.
  • the second magnet arrangement 37 also comprises several permanent magnets 137, 138 with four magnetic poles, which are either a magnetic north pole or a magnetic south pole.
  • each permanent magnet 135, 136, 137, 138 is depicted as being a hypothetical magnetic monopole.
  • each permanent magnet has a magnetic north pole and a magnetic south pole.
  • each permanent magnet 135, 136, 137, 138 is arranged such that only one of its magnetic poles is effective, hence each magnet arrangement having four magnetic poles comprises four permanent magnets.
  • both opposite magnetic poles of one permanent magnet 135, 136, 137, 138 are arranged to be effective.
  • the four magnetic poles of the first magnet arrangement 35 in one embodiment are provided on two semi-circular shaped permanent magnets and/or the four magnetic poles of the second magnet arrangement 37 are provided on two semi-circular shaped permanent magnets.
  • the drive shaft 5 is driven to rotate about the drive axis 7 by means of the actuator 31 of the motor unit 32, wherein the first magnet arrangement 35 rotates together with the drive shaft 5 about the drive axis 7.
  • the first magnet arrangement 35 is displaced relative to the second magnet arrangement 37 with the rotation of the drive shaft 5.
  • attractive and/or repulsive forces between the permanent magnets 135, 136 of the first magnet arrangement 35 and the permanent magnets 137, 138 of the second magnet arrangement 37 exert a variable assisting drive torque on the drive shaft 5, the direction and strength of which depends on the relative angular position of the drive shaft 5 carrying the first magnet arrangement 35 with respect to the second magnet arrangement 37.
  • the drive torque of the actuator 31 of the motor unit 32 and the assisting drive torque of the passive assisting device 33 together provide a resulting drive torque on the drive shaft 5.
  • the second magnet arrangement 37 in the embodiment shown is mounted in a magnet housing 39.
  • the magnet housing 39 is mounted moveable with respect to the drive shaft 5 along an axial direction of the drive shaft 5 by means of two bars 41, wherein an additional actuator device 40 is provided for moving the magnet housing 39 with the second magnet arrangement 37 along the axial direction of the drive shaft 5.
  • the additional actuator device 40 comprises for example a hydraulic or pneumatic linear actuator (not shown in detail) comprising a piston 44.
  • the first magnet arrangement 35 and the second magnet arrangement 37 each comprise two magnetic poles of a first magnetic polarity and two magnetic poles of an opposite second magnetic polarity, which are evenly distributed about the circumference, so that each magnetic pole occupies one sector of 90°.
  • the magnetic poles of the first magnetic polarity of the first magnet arrangement 35 are arranged opposite to the magnetic poles of the first magnetic polarity of the second magnet arrangement 37 and the magnetic poles of the second magnetic polarity of the first magnet arrangement 35 are arranged opposite to the magnetic poles of the second magnetic polarity of the second magnet arrangement 37.
  • repulsive and attractive forces balance each other and this angular position is an unstable magnetic equilibrium point for example associated with a lower position of the heald frame 3.
  • the drive shaft 5 When exerting a drive torque by means of the actuator 31 of the motor unit 32, the drive shaft 5 is driven to rotate for example in a counterclockwise direction, wherein after the drive shaft 5 is rotated out of the unstable magnetic equilibrium point, the repulsive and attractive forces between the magnetic poles exert a positive assisting drive torque, which is acting on the drive shaft 5 in the counterclockwise direction, i.e. in the movement direction of drive shaft 5. Hence, the torque applied by the actuator 31 for causing that movement can be reduced. After the drive shaft 5 is rotated by 90°, a stable magnetic equilibrium point of the passive assisting device 33 is reached as shown in Fig. 3 .
  • Figs. 6 to 8 show a further driving device with a rotating drive shaft 5, wherein for the same or similar elements the same reference numbers are used. More particular, Figs. 6 to 8 show a driving device, namely a sley drive 101 of a weaving machine in a first angular position, a second angular position, and a third angular position of the drive shaft 5, respectively.
  • the sley drive 101 shown in Figs. 6 to 8 is used for driving a sley unit 42 comprising several sley levers 45, which are carrying a sley beam 43 with a reed 48, to rotate to-and-fro about a sley lever axis 47.
  • a fabric 80 and two sheets of warps 81, 82 are shown, as well as a part of a frame 56 of the weaving machine and a fabric support 54 mounted to the frame 56 of the weaving machine.
  • a second driven component in the form of a reed 48 is coupled to the sley drive 101.
  • the sley drive 101 comprises two conjugated cams 49, 51.
  • the cams 49, 51 are fixedly mounted on the drive shaft 5 to rotate conjointly with the drive shaft 5 about the drive axis 7.
  • the sley drive 101 further comprises a fork element 53 having two support arms 55, which together with several sley levers 45 are fixedly mounted on a sley shaft 57 to pivot conjointly about the sley lever axis 47.
  • rollers 59 are provided at the distal ends of the support arms 55.
  • the sley drive 101 comprises an actuator (not shown) for driving the drive shaft 5 to rotate about the drive axis 7, thereby causing the sley levers 45 with the sley beam 43 to pivot to-and-fro about the sley lever axis 47.
  • the actuator is for example a main actuator of a weaving machine, in particular a main motor, or an actuator only associated with the sley drive 101.
  • the sley drive 101 further comprises a first magnet arrangement 35 comprising one permanent magnet 136, which is mounted to the drive shaft 5 to rotate with the drive shaft 5. Further, a second magnet arrangement 37 is provided comprising two permanent magnets 137, which are arranged in a rotationally fixed position with respect to the drive shaft 5, for example in a magnet housing 39 as shown in Figs. 4 and 5 .
  • each permanent magnet 136, 137 is arranged in a sector of 60°, wherein the two permanent magnets 137 of the second magnet arrangement 37 are offset by a sector of 60°.
  • the permanent magnet 136 of the first magnet arrangement 35 is arranged in the sector between the two permanent magnets 137 of the second magnet arrangement 37.
  • the two effective magnetic poles of the permanent magnets 137 of the second magnet arrangement 37 cause at least essentially identical attractive forces and the position shown in Fig. 6 is an unstable equilibrium point.
  • the configuration is for example associated with the beat-up position of the sley levers 45.
  • the magnetic pole of the permanent magnets 137 of the second magnet arrangement 37 exerts an attractive force causing a positive assisting drive force on the drive shaft 5 in the movement direction of the drive shaft 5 until the stable equilibrium point shown in Fig. 7 is reached, in which stable equilibrium point the magnetic pole of the permanent magnet 136 of the first magnet arrangement 35 is arranged opposite to the magnetic pole of one of the permanent magnets 137 of the second magnet arrangement 37.
  • the drive shaft 5 By exerting a drive torque by means of an actuator (not shown) on the drive shaft 5, the drive shaft 5 is further driven to thereby rotate the sley unit 42 clockwise against the attractive forces between the magnetic poles 136, 137, which exert a negative assisting drive torque acting against the movement direction of the drive shaft 5 until again after a rotation about 180° from the initial position, a further unstable equilibrium point is reached as shown in Fig. 8 .
  • Figs. 9 to 12 show two further driving device, namely a sley drive 201 and a gripper drive 301 with a common rotating drive shaft 5, wherein for the same or similar elements the same reference numbers are used. More particular, Figs. 9 to 12 show a sley drive 201 of a weaving machine for moving a reed 48 and Figs. 11 and 12 additionally show a gripper drive 301 of a weaving machine for moving a rapier. The sley drive 201 and the gripper drive 301 are driven simultaneously by rotating the common drive shaft 5.
  • the two driving devices of Figs. 9 to 12 comprise a common actuator (not shown) for driving the drive shaft 5 to rotate about the drive axis 7, thereby causing, as shown in Figs. 9 and 10 , the sley unit 42 with the reed 48 to pivot to-and-fro about a sley lever axis 47, and, as shown in Figs. 11 and 12 , a rapier unit 61 to move a gripper into and out of a shed.
  • the sley unit 42 comprises two conjugated cams 49, 51 that are fixedly mounted on the shaft 50 rotating about an axis 52 and driven by the drive shaft 5.
  • a sley unit 42 for moving a reed 48 is known from EP 0726345 A1 of the applicant, which is incorporated herewith by reference.
  • a rapier unit 61 for moving a gripper is known from DE 10346227 A1 of the applicant, which is incorporated herewith by reference.
  • the sley drive 201 for moving the reed 48 comprises a first magnet set 202 and the gripper drive 301 for moving the rapier comprises a second magnet set 203, with each set 202, 203 comprising a first magnet arrangement 35 and a second magnet arrangement 37.
  • the first magnet set 202 is shown in Figs. 9 and 10 and has a first magnet arrangement 35 comprising one first permanent magnet 135 with a first effective magnetic pole, which is mounted to the drive shaft 5 to rotate with the drive shaft 5, and a second magnet arrangement 37 comprising two second permanent magnets 138 forming two effective magnetic poles, which are arranged in a rotationally fixed position with respect to the drive axis 7.
  • the two magnetic poles of the second permanent magnets 138 of the second magnet arrangement 37 have the same magnetic polarity and have the opposite polarity of the magnetic pole of the first permanent magnet 135 of the first magnet arrangement 35, wherein the magnetic poles could be either magnetic south poles or magnetic north poles.
  • each magnetic pole is arranged in a sector of 30°, wherein the two magnetic poles of the second permanent magnets 138 of the second magnet arrangement 37 are offset by a sector of 30°.
  • the first permanent magnet 135 of the first magnet arrangement 35 is arranged in the sector between the two permanent magnets 138 of the second magnet arrangement 37.
  • the two magnetic poles of the second permanent magnets 138 of the second magnet arrangement 37 cause at least essentially identical attractive forces and the position shown in Fig. 9 is an unstable equilibrium point.
  • the configuration is for example associated with the beat-up position of the sley unit 42.
  • the second permanent magnets 138 of the second magnet arrangement 37 When rotating the drive shaft 5 counterclockwise, the second permanent magnets 138 of the second magnet arrangement 37, towards which the first permanent magnet 135 of the first magnet arrangement 35 is rotated, exert an attractive force causing a positive assisting drive force on the drive shaft 5 acting in the movement direction until the stable equilibrium point is reached in which the first permanent magnet 135 of the first magnet arrangement 35 is arranged opposite to one of the second permanent magnets 138 of the second magnet arrangement 37.
  • the drive shaft 5 By exerting a drive torque by means of the actuator on the drive shaft 5, the drive shaft 5 is driven to rotate counterclockwise against the attractive forces between the permanent magnets 135, 138, which exert a negative assisting drive torque acting against the movement direction of the drive shaft 5 until again after a rotation about 180° from the beat-up position, a further unstable equilibrium point is reached.
  • the second magnet set 203 of the gripper drive 301 for moving the rapier (not shown) by means of a rapier unit 61 is shown in Figs. 11 and 12 .
  • the rapier unit 61 comprises a disc 63, which is driven to rotate about the axis 52 by means of the drive shaft 5.
  • a toothed gear is provided, which is driven via a gear 71 rotating about a gear axis 72 by a gear 73 mounted on the drive shaft 5.
  • a swivel element 65 is mounted with respect to the disc 63 to swivel with the rotation of the disc 63 to-and-fro about a swivel axis 67.
  • a toothed gear segment can be provided, which drives a wheel, which wheel is used for driving a rapier.
  • the disc 63 drives the swivel element 65 via an arrangement 62 that is coupled to the disc 63 via a shaft 64 and a shaft support 66,
  • the swivel element 65 can swivel about a swivel axis 68.
  • a similar arrangement is disclosed in DE 10346227 A1 .
  • the second magnet set 203 as shown in Figs. 11 and 12 has a first magnet arrangement 35 comprising four first permanent magnets 135, 136 forming four effective magnetic poles, which first magnet arrangement 35 is mounted to the drive shaft 5 to rotate with the drive shaft 5, and a second magnet arrangement 37 comprising four second permanent magnets 137, 138 forming four effective magnetic poles, which are arranged in a non-rotating or rotationally fixed position with respect to the drive shaft 5.
  • the first magnet set 202 assists the actuator in decelerating the sley unit 42 when it arrives at its front dead point or its rear dead point, which are unstable magnetic equilibrium points.
  • the first magnet set 202 further assists the actuator in accelerating the sley unit 42 when it starts moving out of the front dead point or the rear dead point.
  • the second magnet set 203 assists the actuator in decelerating the rapier when it arrives at its front dead point or its rear dead point, which are unstable magnetic equilibrium points.
  • the second magnet set 203 further assists the actuator in accelerating the rapier when it starts moving out of the front dead point or the rear dead point.
  • first magnet set 202 and the second magnet set 203 are combined in one magnet set.
  • the driving device 1, 101, 201, 301 comprises a drive shaft 5 provided with a first magnet arrangement 35, wherein the drive shaft 5 with the first magnet arrangement 35 is arranged and driven to rotate through 360°, also referred to as driven to revolute.
  • the second magnet arrangement 37 is arranged in a non-rotating position along the circumference of the drive shaft 5.
  • a magnetic flux field is produced in a gap between the rotating first magnet arrangement 35 and the non-rotating stationary second magnet arrangement 37, in particular a magnetic flux field in a radial direction of the drive shaft 5.
  • the first magnet arrangement 35 moves transverse to the magnetic flux field.
  • the first magnet arrangement 35 and the second magnet arrangement 37 form at least one stable magnetic equilibrium point.
  • driving devices namely a harness drive 401, 501 of a weaving machine, a sley drive 601 of a weaving machine, and a gripper drive 701 of a weaving machine comprising a drive shaft 5, which is arranged and driven to rotate through 360°.
  • a first magnet arrangement 35 of these driving devices is arranged on a driven component, which is driven by the drive shaft 5, and, with the rotation of the drive shaft 5, carries out a to-and-fro movement.
  • the second magnet arrangement 37 is arranged in a stationary position along a movement path of the component carrying the first magnet arrangement.
  • Figs. 13 and 14 show a harness drive 401 of a weaving machine similar to the harness drive 1 shown in Figs. 1 to 5 .
  • the same reference signs will be used.
  • a heald frame 3 is coupled to the harness drive 401.
  • the harness drive 401 comprises a drive shaft 5 rotating about a drive axis 7, a first transmission element in the form of a crank 9 mounted to the drive shaft 5, a second transmission element in the form of a coupling rod 11, and a swivel lever 13.
  • the swivel lever 13 is swivelable to-and-fro about a swivel axis 15 between an upper position and a lower position.
  • the harness drive 401 further comprises a second swivel lever 17, swivelable to-and-fro about a second swivel axis 18 between an upper position and a lower position.
  • the second swivel lever 17 is connected to the swivel lever 13 by means of a coupling rod 19 and driven by the swivel lever 13 to conjointly move with the swivel lever 13.
  • the heald frame 3 is mounted to the swivel levers 13, 17 by means of a connecting assembly comprising coupling elements 20 and lifting rods 21.
  • the harness drive 401 comprises a passive assisting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37.
  • the first magnet arrangement 35 is mounted to the coupling rod 19 to move with the coupling rod 19 to-and-fro along a linear path.
  • the second magnet arrangement 37 is mounted stationary in position for example on a frame 156 (only indicated schematically) of the weaving machine.
  • the first magnet arrangement 35 comprises three first permanent magnets 136 having the same magnetic polarity.
  • the second magnet arrangement 37 comprises three second permanent magnets 137 having the same magnetic polarity, wherein the magnetic polarity of the second permanent magnets 137 is opposite to that of the first permanent magnets 136.
  • the first magnet arrangement 35 is moved with the coupling rod 19 transverse to a magnetic flux field generated between the moving first magnet arrangement 35 and the stationary second magnet arrangement 37.
  • the first magnet arrangement 35 is displaced to the left with respect to the second magnet arrangement 37 and the passive assisting device exerts a force on the coupling rod 19 forcing the coupling rod 19 towards the right in the figure, i.e. in an intended movement direction of the coupling rod 19.
  • the attractive forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a positive assisting drive torque, and the torque applied by the actuator 31 can be reduced.
  • a stable magnetic equilibrium point of the passive assisting device 33 is reached as shown in Fig. 14 , wherein the first magnet arrangement 35 is placed directly opposite the second magnet arrangement 37.
  • an actuator not shown in Figs. 13 and 14
  • the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative assisting drive torque acting against the movement direction of the drive shaft 5.
  • the first magnet arrangement 35 and the second magnet arrangement 37 form at least one stable magnetic equilibrium point.
  • Figs. 15 and 16 show a harness drive 501 of a weaving machine similar to the harness drive 401 shown in Figs. 13 and 14 .
  • the same reference signs will be used, and for a detailed description of these elements reference is made to the description above.
  • the harness drive 501 also comprises a passive assisting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37.
  • the first magnet arrangement 35 is mounted to the swivel lever 13 to oscillate with the swivel lever 13 to-and-fro about the swivel axis 15.
  • the second magnet arrangement 37 is mounted in a non-rotating position with respect to the swivel axis 15, for example in a magnet housing 39 as shown in Figs. 4 and 5 , or on a frame (not shown) of the weaving machine.
  • the first magnet arrangement 35 comprises two first permanent magnets 135, 136 of opposite magnetic polarity.
  • the second magnet arrangement 37 also comprises two second permanent magnets 137, 138 of opposite magnetic polarity.
  • the two first permanent magnets 135, 136 and/or the two second permanent magnets 137, 138 in one embodiment are formed integrally as one semi-circular element.
  • the first magnet arrangement 35 and the second magnet arrangement 37 form a stable magnetic equilibrium point.
  • the swivel lever 13 is rotated clockwise in the drawing view out of the stable magnetic equilibrium point towards the position as shown in Fig. 16 , and the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative assisting drive torque acting opposite to the movement direction of the swivel lever 13 and, thus, a movement of the drive shaft 5.
  • Figs. 17 and 18 show a sley drive 601, similar to the sley drive 101 shown in Figs. 6 to 8 .
  • the sley drive 601 is used for driving a sley unit 42 with a reed 48 to swivel to-and-fro about a sley lever axis 47.
  • the sley unit 42 is driven by the drive shaft 5 (see Figs. 6 to 8 , not shown in Figs. 17 and 18 ) about the sley lever axis 47.
  • the sley drive 601 comprises a passive assisting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37.
  • the first magnet arrangement 35 is mounted to the sley unit 42 to oscillate with the sley unit 42 to-and-fro about the sley lever axis 47.
  • the second magnet arrangement 37 is mounted in a non-rotating position with respect to sley lever axis 47, for example in a magnet housing 39 as shown in Figs. 4 and 5 .
  • the first magnet arrangement 35 comprises two first permanent magnets 135, 136 of opposite magnetic polarity.
  • the second magnet arrangement 37 also comprises two second permanent magnets 137, 138 of opposite magnetic polarity.
  • the two first permanent magnets 135, 136 and/or the two second permanent magnets 137, 138 in one embodiment are formed integrally as one semi-circular element.
  • the first magnet arrangement 35 and the second magnet arrangement 37 are displaced out of a stable magnetic equilibrium point.
  • an actuator not shown in Figs. 17 and 18
  • the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a positive assisting drive torque acting in the movement direction of the sley unit 42 until the stable magnetic equilibrium point is reached.
  • the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative assisting drive torque acting against the movement direction of the sley unit 42.
  • Figs. 19 and 20 show a driving device, namely a gripper drive 701 for moving a rapier (not shown) by means of a rapier unit 61 as shown and described in Figs. 11 and 12 .
  • the rapier unit 61 comprises a disc 63, wherein the drive shaft 5 (not shown in Figs 19 , 20 ) is drivingly coupled to the disc 63 to rotate the disc 63.
  • a swivel element 65 is mounted with respect to the disc 63 to swivel with the rotation of the disc 63 to-and-fro about a swivel axis 67.
  • the gripper drive 701 comprises a passive assisting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37.
  • the first magnet arrangement 35 is mounted to the swivel element 65 to oscillate with the swivel element 65 to-and-fro about the swivel axis 67.
  • the second magnet arrangement 37 is mounted in a non-rotating position with respect to swivel axis 67, for example in a magnet housing 39 as shown in Figs. 4 and 5 .
  • the first magnet arrangement 35 comprises two first permanent magnets 135, 136 of opposite magnetic polarity.
  • the second magnet arrangement 37 also comprises two second permanent magnets 137, 138 of opposite magnetic polarity.
  • the two first permanent magnets 135, 136 and/or the two second permanent magnets 137, 138 in one embodiment are formed integrally as one semi-circular element.
  • the first magnet arrangement 35 and the second magnet arrangement 37 are displaced out of a stable magnetic equilibrium point.
  • an actuator not shown in Figs. 19 and 20
  • the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a positive assisting drive torque acting in the desired movement direction of the swivel element 65 until the stable magnetic equilibrium point shown in Fig. 20 is reached.
  • the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative assisting drive torque acting against the movement direction of the swivel element 65.
  • a harness drive 801 a sley drive 901
  • a gripper drive 1001 comprising a drive shaft 5, which is arranged and driven to oscillate, i.e. to rotate to-and-fro.
  • Figs. 21 and 22 show a harness drive 801 of a weaving machine similar to the harness drive 1 shown in Figs. 1 to 5 .
  • a drive shaft 5 of the harness drive 801 is provided coaxially to the swivel axis 15 of the first swivel lever 13.
  • the drive shaft 5 is driven by an actuator 31 (not shown in detail) to rotate to-and-fro about the drive axis 7, which coincides with the swivel axis 15.
  • the actuator 31 is designed as a controllable motor.
  • the harness drive 801 also comprises a passive assisting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37.
  • the first magnet arrangement 35 is mounted to the second swivel lever 17 to oscillate with the swivel lever 17 to-and-fro about the swivel axis 18.
  • the second magnet arrangement 37 is mounted in a non-rotating position with respect to the swivel axis 18, for example in a magnet housing 39 as shown in Figs. 4 and 5 , or on a frame (not shown) of the weaving machine.
  • the first magnet arrangement 35 comprises two first permanent magnets 135, 136 of opposite magnetic polarity.
  • the second magnet arrangement 37 also comprises two second permanent magnets 137, 138 of opposite magnetic polarity.
  • the two first permanent magnets 135, 136 and/or the two second permanent magnets 137, 138 in one embodiment are formed integrally as one semi-circular element.
  • Figs. 23 to 25 show a sley drive 901 for driving a sley unit 42 with a reed 48 to swivel to-and-fro about a sley lever axis 47.
  • a drive shaft 5 is drivingly coupled to the sley unit 42, in particular is made in one piece with the sley shaft 57.
  • the sley drive 901 comprises an actuator 31 drivingly coupled to a drive shaft 5 for rotating the drive shaft 5 to-and-fro about the drive axis 7 for causing the sley beam 43 with the reed 48 to move to-and-fro, which drive axis 7 coincides with the sley lever axis 47.
  • the sley drive 901 further comprises a passive assisting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37.
  • the first magnet arrangement 35 is mounted to the sley unit 42, in particular to the sley shaft 57 of the sley unit 42, to oscillate with the sley unit 42 to-and-fro about the sley lever axis 47.
  • the second magnet arrangement 37 is mounted in a non-rotating position with respect to sley lever axis 47, for example in a magnet housing 39 as shown in Figs. 4 and 5 .
  • the first magnet arrangement 35 comprises two first permanent magnets 135, 136 of opposite magnetic polarity.
  • the second magnet arrangement 37 also comprises two second permanent magnets 137, 138 of opposite magnetic polarity.
  • the two first permanent magnets 135, 136 and/or the two second permanent magnets 137, 138 in one embodiment are formed integrally as one semi-circular element.
  • the drive torque of the actuator 31 and the assisting drive torque of the assisting device 33 provide a resulting drive torque on the drive shaft 5 shown in Fig. 25 , in particular on the drive shaft 57 drivingly coupled to the drive shaft 5, wherein the assisting device 33 either provides a positive assisting drive torque or a negative assisting drive torque, which are chosen so that the drive torque to be provided by the at least one actuator 31 can be more constant compared to devices not equipped with an assisting device 33.
  • the first magnet arrangement 35 and the second magnet arrangement 37 are displaced out of a stable magnetic equilibrium point.
  • the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a positive assisting drive torque acting in the desired movement direction of the drive shaft 5 until the stable magnetic equilibrium point shown is reached.
  • the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative assisting drive torque acting against the movement direction of the drive shaft 5.
  • the assisting drive torque can cause a deceleration of the drive shaft 5 even when a constant drive torque is applied by the actuator 31.
  • the direction of the drive torque applied by the actuator 31 is reversed to move the drive shaft 5 counterclockwise.
  • the assisting driving device 33 provides a positive assisting drive torque acting in the movement direction of the drive shaft 5 until the stable equilibrium point is reached.
  • the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative assisting drive torque acting against the movement direction of the drive shaft 5.
  • Figs. 26 to 28 show a driving device, namely a gripper drive 1001 for moving a rapier (not shown) with a gripper (not shown) by means of a wheel 69.
  • a third driven component for example in the form of a wheel 69 is coupled to the gripper drive 1001.
  • the gripper drive 1001 comprises a drive shaft 5, which is driven to rotate to-and-fro about a drive axis 7 by means of an actuator 31.
  • the drive shaft 5 is drivingly coupled to a swivel element 65 to rotate the swivel element 65 to-and-fro about a swivel axis 67 with the to-and-fro rotation of the drive shaft 5, wherein in the embodiment shown the swivel axis 67 coincides with the drive axis 7.
  • a toothed gear segment 75 is provided, which drives the wheel 69 via a gear 76, which gear 76 is mounted to the wheel 69 via a gear shaft 77.
  • the gripper drive 1001 further comprises a passive assisting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37.
  • the first magnet arrangement 35 is mounted to the swivel element 65 to oscillate with the swivel element 65 about the swivel axis 67.
  • the second magnet arrangement 37 is mounted in a non-rotating position with respect to swivel axis 67, for example in a magnet housing 39 as shown in Figs. 4 and 5 .
  • the first magnet arrangement 35 comprises two first permanent magnets 135, 136 of opposite magnetic polarity.
  • the second magnet arrangement 37 also comprises two second permanent magnets 137, 138 of opposite magnetic polarity.
  • the two first permanent magnets 135, 136 and/or the two second permanent magnets 137, 138 in one embodiment are formed integrally as one semi-circular element.
  • Figs. 29 and 30 show a further driving device, namely a gripper drive 1101 for moving a rapier (not shown) by means of a wheel 69, wherein for the same or similar elements the same reference numbers are used as in the embodiment of Figs. 26 to 28 .
  • the second magnet arrangement 37 is mounted in a magnet housing 79.
  • the magnet housing 79 is arranged in a frame (not shown) of the weaving machine, so that the magnet housing 79 can rotate about the swivel axis 7, 67. In this way, the second magnet arrangement 37 can be rotated about the swivel axis 7, 67 by rotating the magnet housing 79.
  • a setting device 74 is provided to rotate and to fix the magnet housing 79 with respect to the frame (not shown) of the weaving machine.
  • the setting device 74 comprises a threaded element 84 of which an end is secured rotatable in an axial position with respect to a projection 78 of the housing 79.
  • a projection 85 is mounted fixed to the frame (not shown) of the weaving machine, which projection 85 comprises a threaded hole.
  • the angular position of the housing 79 with the second magnet arrangement 37 can be set.
  • Two possible angular positons of the housing 79 are shown respectively in Fig. 29 and Fig. 30 .
  • a nut element 86 can be provided for fixing the threaded element 84 with respect to the projection 85, and thus also the position of the housing 79 with the projection 78 with respect to the frame (not shown) of the weaving machine. This arrangement allows to set the angular position of a stable magnetic equilibrium point of the passive assisting device 33.
  • the first magnet arrangement 35 is arranged on the drive shaft 5 to move with the drive shaft 5.
  • the assisting device is provided on a separate assisting device shaft, wherein a transmission, in particular a gear transmission, is provided between the assisting device shaft and the drive shaft 5 driven by the actuator 31.
  • a transmission in particular a gear transmission
  • Such an embodiment is in particular advantageous for the embodiments shown in Figs. 21 to 30 , wherein an amplitude of the oscillating movement of the assisting device shaft can be chosen larger or smaller than an amplitude of the oscillating movement of the drive shaft 5.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)

Claims (15)

  1. Dispositif d'entraînement pour une machine à tisser, le dispositif d'entraînement comprenant un arbre d'entraînement (5) avec un axe d'entraînement (7), au moins un actionneur (31) exerçant un couple d'entraînement sur l'arbre d'entraînement (5) pour tourner l'arbre d'entraînement (5) autour de l'axe d'entraînement (7), dans lequel un couple d'entraînement requis varie avec une position angulaire de l'arbre d'entraînement (5), et un dispositif d'assistance (33) avec un premier arrangement magnétique (35) et un deuxième arrangement magnétique (37), dans lequel le premier arrangement magnétique (35) et le deuxième arrangement magnétique (37) sont déplacés l'un par rapport à l'autre avec la rotation de l'arbre d'entraînement (5), et dans lequel dans au moins une position angulaire de l'arbre d'entraînement (5) une force d'attraction et/ou de répulsion entre le premier arrangement magnétique (35) et le deuxième arrangement magnétique (37) exerce un couple d'entraînement d'assistance sur l'arbre d'entraînement (5), dans lequel le couple d'entraînement d'au moins un actionneur (31) et le couple d'entraînement d'assistance du dispositif d'assistance (33) fournit un couple d'entraînement résultant sur l'arbre d'entraînement (5), caractérisé en ce que le dispositif d'assistance (33) est un dispositif d'assistance passif, dans lequel le premier arrangement magnétique (35) comprend au moins un premier aimant permanent (135, 136) et le deuxième arrangement magnétique (37) comprend au moins un deuxième aimant permanent (137, 138).
  2. Dispositif d'entraînement selon la revendication 1, caractérisé en ce que le premier arrangement magnétique (35) comprend au moins un premier pôle magnétique et le deuxième arrangement magnétique (37) comprend au moins un deuxième pôle magnétique, qui est de polarité opposée à l'au moins un premier pôle magnétique, dans lequel dans une zone de déplacement de l'arbre d'entraînement (5), le premier arrangement magnétique (35) et le deuxième arrangement magnétique (37) sont déplacés l'un par rapport à l'autre pour former au moins un point d'équilibre magnétique stable, dans lequel au moyen d'au moins un actionneur le premier arrangement magnétique (35) et le deuxième arrangement magnétique (37) sont déplacés l'un par rapport à l'autre hors d'au moins un point d'équilibre magnétique stable.
  3. Dispositif d'entraînement selon la revendication 1 ou 2, caractérisé en ce qu'un champ de flux magnétique est généré entre le premier arrangement magnétique (35) et le deuxième arrangement magnétique (37), dans lequel le premier arrangement magnétique (35) et le deuxième arrangement magnétique (37) sont déplacés l'un par rapport à l'autre dans une direction transversale au champ de flux magnétique généré.
  4. Dispositif d'entraînement selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le premier arrangement magnétique (35) est disposé sur l'arbre d'entraînement (5) pour tourner avec l'arbre d'entraînement (5) et le deuxième arrangement magnétique (37) est disposé à la circonférence de l'arbre d'entraînement (5) dans une position non rotative par rapport à l'axe d'entraînement (7).
  5. Dispositif d'entraînement selon la revendication 4, caractérisé en ce que le deuxième arrangement magnétique (37) est monté mobile par rapport à l'arbre d'entraînement (5) le long de l'axe d'entraînement (7).
  6. Dispositif d'entraînement selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le premier arrangement magnétique (35) comprend au moins deux pôles magnétiques efficaces, dans lequel en particulier au moins deux pôles magnétiques du premier arrangement magnétique (35) diffèrent dans au moins l'une d'une polarité, d'une amplitude, d'une taille et/ou en ce que des espaces entre des pôles magnétiques adjacents diffèrent en taille.
  7. Dispositif d'entraînement selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le deuxième arrangement magnétique (37) comprend au moins deux pôles magnétiques efficaces, dans lequel en particulier au moins deux pôles magnétiques du deuxième arrangement magnétique (37) diffèrent dans au moins l'une d'une polarité, d'une amplitude, d'une taille et/ou en ce que des espaces entre des pôles magnétiques adjacents diffèrent en taille.
  8. Dispositif d'entraînement selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'au moins un actionneur (31) est un moteur électrique.
  9. Dispositif d'entraînement selon l'une quelconque des revendications 1 à 8, dans lequel le dispositif d'entraînement (1, 101, 201, 301, 401, 501, 601, 701, 801, 901, 1001, 1101) est choisi du groupe comprenant au moins une commande de cadre, une commande de pince, une commande du battant, une commande de la lisière.
  10. Groupe d'assemblage d'une machine à tisser comprenant un dispositif d'entraînement selon les revendications 1 à 9 et un composant entraîné (3, 48, 69) relié à l'arbre d'entraînement (5) du dispositif d'entraînement.
  11. Machine à tisser comprenant un dispositif d'entraînement selon les revendications 1 à 9.
  12. Machine à tisser selon la revendication 11, caractérisée en ce que l'arbre d'entraînement (5) du dispositif d'entraînement est relié par entraînement à au moins un composant entraîné (3) de la machine à tisser pour déplacer au moins un composant entraîné (3) en va-et-vient le long d'un trajet de déplacement et/ou pour tourner au moins un composant entraîné (3) autour d'un axe le long d'un trajet de déplacement circonférentiel lors de la rotation de l'arbre d'entraînement (5), dans lequel en particulier la machine à tisser comprend au moins un élément de transmission (9, 11, 13, 17, 19, 21) et l'arbre d'entraînement (5) est relié par entraînement à au moins un composant entraîné (3) par l'au moins un élément de transmission (9, 11, 13, 17, 19, 21).
  13. Machine à tisser selon la revendication 12, caractérisée en ce que lors de son déplacement, l'au moins un composant entraîné (3, 48, 69) et/ou l'au moins un élément de transmission (9, 11, 13, 17, 19, 21) exercent ou exerce un couple de réaction sur l'arbre d'entraînement (5), dans lequel le premier arrangement magnétique (35) et le deuxième arrangement magnétique (37) sont disposés de telle sorte qu'au moins dans une position angulaire de l'arbre d'entraînement (5), le couple d'entraînement d'assistance exercé par le premier arrangement magnétique (35) et le deuxième arrangement magnétique (37) est contraire au couple de réaction.
  14. Machine à tisser selon la revendication 12 ou 13, caractérisée en ce que le premier arrangement magnétique (35) est disposé sur le composant entraîné (3, 48, 69) et/ou un élément de transmission (9, 11, 13, 17, 19, 21) pour se déplacer avec le composant entraîné et/ou l'élément de transmission (9, 11, 13, 17, 19, 21), et le deuxième arrangement magnétique (37) est disposé dans une position stationnaire le long d'un trajet de déplacement du composant entraîné (3) et/ou de l'élément de transmission (9, 11, 13, 17, 19, 21).
  15. Procédé pour entraîner un arbre d'entraînement (5) dans une machine à tisser, dans lequel au moyen d'au moins un actionneur (31) un couple d'entraînement est exercé sur l'arbre d'entraînement (5) pour tourner l'arbre d'entraînement (5) autour d'un axe d'entraînement (7), dans lequel un couple d'entraînement requis varie avec une position angulaire de l'arbre d'entraînement (5), et dans lequel dans au moins une position angulaire de l'arbre d'entraînement (5) un couple d'entraînement d'assistance est exercé sur l'arbre d'entraînement (5), dans lequel le couple d'entraînement d'au moins un actionneur (31) et le couple d'entraînement d'assistance du dispositif d'assistance (33) fournit un couple d'entraînement résultant, dans lequel le couple d'entraînement d'assistance est exercé par une force d'attraction et/ou de répulsion entre le premier arrangement magnétique (35) comprenant au moins un premier aimant permanent (135, 136) et un deuxième arrangement magnétique (37) comprenant au moins un deuxième aimant permanent (137, 138), dans lequel le premier arrangement magnétique (35) et le deuxième arrangement magnétique (37) sont déplacés l'un par rapport à l'autre avec la rotation de l'arbre d'entraînement (5).
EP18718797.6A 2018-04-18 2018-04-18 Dispositif d'entraînement pour un métier à tisser avec dispositif d'assistance Active EP3781735B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/059815 WO2019201433A1 (fr) 2018-04-18 2018-04-18 Dispositif d'entraînement pour un métier à tisser avec dispositif d'assistance

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EP3781735A1 EP3781735A1 (fr) 2021-02-24
EP3781735B1 true EP3781735B1 (fr) 2023-12-27
EP3781735C0 EP3781735C0 (fr) 2023-12-27

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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04681U (fr) * 1990-04-19 1992-01-07
BE1009097A3 (nl) 1995-02-07 1996-11-05 Picanol Nv Weefmachine met aandrijving.
JP2004052150A (ja) * 2002-07-19 2004-02-19 Tsudakoma Corp 織機の往復運動装置
BR0315242A (pt) * 2002-10-10 2005-08-23 Dornier Gmbh Lindauer Processo para o comando de componentes de um meio de trabalho em teares automáticos e tear automático para a execução do processo
DE10331916A1 (de) 2003-07-15 2005-02-24 Lindauer Dornier Gmbh Antriebsvorrichtung zur Erzeugung einer hin- und hergehenden Bewegung eines angetriebenen Bauteil, insbesondere in Webmaschinen
DE10346227B4 (de) 2003-09-23 2012-09-13 Picanol N.V. Greiferbandantrieb für eine Greiferwebmaschine
DE102005058066A1 (de) * 2005-12-06 2007-06-14 Lindauer Dornier Gmbh Elektromotorischer Antrieb einer Weblade einer Webmaschine sowie Webmaschine mit einem derartigen Antrieb
EP3341509B1 (fr) 2015-08-26 2020-04-15 Picanol Mécanisme d'entrainement comprenant un dispositif capteur pour entrainer un cadre de lisse d'un métier à tisser
JP7358335B2 (ja) * 2017-04-28 2023-10-10 アンスパン， インコーポレイテッド トポグラフィカル織布を作成するためのシステムおよび方法

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CN112105767B (zh) 2022-04-05
WO2019201433A1 (fr) 2019-10-24
EP3781735C0 (fr) 2023-12-27
BE1026177A1 (nl) 2019-10-28
BE1026177B1 (nl) 2020-02-27
EP3781735A1 (fr) 2021-02-24
CN112105767A (zh) 2020-12-18

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