EP4242365A1 - Antriebssystem für eine webmaschine - Google Patents

Antriebssystem für eine webmaschine Download PDF

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Publication number
EP4242365A1
EP4242365A1 EP22160778.1A EP22160778A EP4242365A1 EP 4242365 A1 EP4242365 A1 EP 4242365A1 EP 22160778 A EP22160778 A EP 22160778A EP 4242365 A1 EP4242365 A1 EP 4242365A1
Authority
EP
European Patent Office
Prior art keywords
gear wheel
drive
drive gear
lever
blocking device
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.)
Pending
Application number
EP22160778.1A
Other languages
English (en)
French (fr)
Inventor
Marc Adriaen
Geert Geerardyn
Arnold Moerman
Robbe Moerman
Pavel Demeersseman
Kristof Roelstraete
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Picanol NV
Original Assignee
Picanol NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Picanol NV filed Critical Picanol NV
Priority to EP22160778.1A priority Critical patent/EP4242365A1/de
Priority to BE20230005A priority patent/BE1030287B1/nl
Priority to PCT/EP2023/051952 priority patent/WO2023169735A1/en
Publication of EP4242365A1 publication Critical patent/EP4242365A1/de
Pending legal-status Critical Current

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Classifications

    • 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 drive system for a weaving machine comprising a first drive gear wheel for driving a first group of elements, a second drive gear wheel for driving a second group of elements, a switching gear wheel, wherein the switching gear wheel is displaceable between a first position, in which the switching gear wheel is in drive connection with the first drive gear wheel and the second drive gear wheel, and a second position, in which the switching gear wheel is not in drive connection with the first drive gear wheel.
  • the invention further relates to a weaving machine with such a drive system.
  • Such a drive system is shown for example in US 5617901 or US 7857011 , wherein a first drive gear wheel is used for driving a first group of elements including a sley drive and a second drive gear wheel is used for driving a second group of elements including a shed formation device.
  • the switching gear wheel is in drive connection with the first drive gear wheel and the second drive gear wheel for driving the first group of elements and the second group of elements in synchronization.
  • the switching gear wheel is displaced into the second position, in which the switching gear is not in drive connection with the first group of elements, so that upon rotation of the switching gear wheel, the first drive gear wheel is not rotated.
  • the drive system shown in US 7857011 further comprises a holding element in the form of a gear wheel, which is axially displaceable with the switching gear wheel, wherein in the second position of the switching gear wheel, the holding element engages with the first drive gear wheel for holding the first drive gear wheel against rotation.
  • a main drive motor coupled thereto, wherein the main drive motor is driven in position modus and/or braked using a brake.
  • a drive system for a weaving machine which comprises a first drive gear wheel for driving a first group of elements, in particular including a sley device, a second drive gear wheel for driving a second group of elements, in particular including a shed formation device, a switching gear wheel, wherein the switching gear wheel is displaceable between a first position, in which the switching gear wheel is in drive connection with the first drive gear wheel and the second drive gear wheel, and a second position, in which the switching gear wheel is not in drive connection with the first drive gear wheel, and a blocking device, wherein the blocking device can be activated for blocking a rotation of the second drive gear wheel while the second drive gear wheel is in standstill, wherein the blocking device comprises a lever having a tooth for engaging with teeth of the second drive gear wheel, and wherein the lever is mounted swivellable about a swivel axis of the lever extending in parallel to the rotation axis of the second drive gear wheel between a blocking position, in which the tooth engages with
  • the blocking device comprising the lever mounted swivellable about the swivel axis extending in parallel to the rotation axis of the second drive gear is advantageous to block the second drive gear wheel against rotation even when large external forces are acting on the second drive gear wheel, wherein the second drive gear wheel exerts a large force on the lever.
  • the design and arrangement are advantageous in that the tooth of the lever can easily engage or disengage with teeth of the second drive gear wheel as the tooth can move almost radially towards or away from the second drive gear wheel. This also allows that the tooth can easily enter between two teeth of the second drive gear wheel even when the tooth is not arranged fully centrally between these two teeth before engaging.
  • the invention is particularly advantageous when the second drive gear wheel is in drive connection with a jacquard system.
  • a jacquard system When a jacquard system is in a standstill position, normally several warp threads are in the open shed position and exert a large force on the second drive gear wheel that needs to be kept in standstill.
  • the switching gear wheel in the second position, in which the switching gear wheel is not in drive connection with the first drive gear wheel, the switching gear wheel is still in drive connection with the second drive gear wheel.
  • a main drive motor is coupled to the second drive gear wheel, wherein the first drive gear wheel in normal operation is coupled to the main drive motor via the second drive gear wheel and the switching gear wheel.
  • the main drive motor is coupled to the switching gear wheel, wherein in normal operation the first drive gear wheel and the second drive gear wheel are coupled to the main drive motor via the switching gear wheel.
  • the first drive gear wheel, the second drive gear wheel and the switching gear wheel are individually or jointly also referred to as gear wheels.
  • the switching gear wheel in the second position of the switching gear wheel, is offset from the first drive gear wheel in the direction of the rotation axis of the first drive gear wheel, so that for interrupting the drive connection teeth of the gear wheels are separated in the axial direction.
  • a teeth area of the first drive gear wheel is provided with at least one notch or clearance running over part of the axial length and several teeth, for example four to fifteen teeth, so that a drive connection is interrupted in case the switching gear wheel is arranged in the area of the at least one notch or clearance.
  • the blocking device comprising the lever having at least one tooth for engaging with teeth of the second drive gear wheel allows to keep the second drive gear wheel in position despite any external forces acting on elements of the second group of elements during standstill of the second drive gear wheel. This allows keeping the second drive gear wheel in position, so that forces and subsequent bearing forces on the switching gear wheel in drive connection with the second drive gear wheel can be reduced, which forces could cause an unintended rotation of the switching gear wheel in drive connection with the second drive gear wheel and/or could cause friction forces between teeth of the switching gear wheel and teeth of the second drive gear wheel that counter an axial displacement of the switching gear, thus, impede a displacement of the switching gear wheel with respect to the first drive gear wheel and the second drive gear wheel for displacing the switching gear between the first position and the second position.
  • the tooth is provided at a side face of the lever facing the teeth of the second drive gear wheel.
  • the tooth is arranged for gripping the teeth of the second drive gear wheel in a tooth cavity.
  • the blocking device for moving the lever, comprises an excentre, which can be swiveled back-and-forth or rotated about an axis of rotation that is parallel to the swivel axis of the lever, wherein the excentre is driven using a piston that is mounted transversely to the axis of rotation of the excentre.
  • the blocking device comprises an axially displaceable piston extending in parallel to the swivel axis of the lever, wherein the piston cooperates with the lever so that the lever is swivellable between the blocking position and the rest position by an axial displacement of the piston.
  • a blocking device can be manufactured compact in design.
  • the lever is provided with a passage aperture offset from the swivel axis of the lever, wherein the piston extends through the passage aperture.
  • the passage aperture and the piston have opposing slanting surfaces.
  • the piston forms part of a pneumatic actuator. In other embodiments, the piston forms part of a hydraulic actuator.
  • a hydraulic actuator allows a reliable movement of the piston back-and-forth and the application of high holding forces.
  • a first end of the piston is mounted in a blocking device housing of the blocking device and a second end of the piston is mounted in a frame of the weaving machine.
  • a supply system for the hydraulic actuator is provided in the blocking device housing.
  • the blocking device housing is fixable to a frame of the weaving machine, for example using bolts or screws.
  • the blocking device comprises a sensor system for sensing whether or not the blocking device is activated, in particular for sensing whether or not the lever is in the blocking position.
  • the second group of elements is moved, wherein in particular the second group of elements is moved via the second drive gear wheel and the main drive in direct or indirect drive connection with the second drive gear wheel.
  • the blocking device must be disengaged from the second drive gear wheel.
  • the sensor system is provided.
  • an output of the sensor system is displayed on a monitor of the weaving machine and/or transmitted to a control system of the weaving machine.
  • the drive system comprises a holding element, which is axially displaceable with the switching gear wheel, wherein in the second position of the switching gear wheel, the holding element engages with the first drive gear wheel for holding the first drive gear wheel against rotation, and wherein in the first position of the switching gear wheel, the holding element is disengaged from the first drive gear wheel, and a displacement device for displacing the switching gear wheel and the holding element between the first position and the second position.
  • the holding element is a gear wheel in accordance with US 7857011 , which is herewith incorporated by reference.
  • the switching gear wheel is arranged to be driven by the main drive motor. In an embodiment, the switching gear wheel can be disconnected from the main drive motor and manually driven or driven by an auxiliary drive motor during pick finding.
  • a brake system for braking the drive system, in particular a brake system for braking a shaft of the main drive motor.
  • the brake system in an embodiment can be activated when stopping the weaving machine for a pick finding.
  • the blocking device can be activated to engage with the second drive gear wheel. After the activation of the blocking device, the brake system can be deactivated.
  • the switching gear wheel in the second position, the switching gear wheel is still in drive connection with the second drive gear wheel.
  • a weaving machine with a drive system having a blocking device as described above is provided.
  • the weaving machine comprises a first drive gear wheel used for driving a first group of elements including a sley drive and a second drive gear wheel used for driving a second group of elements including a shed formation device, in particular a jacquard system.
  • FIGS. 1 to 4 show in simplified views a drive system 1 for a weaving machine (not shown) comprising a first drive gear wheel 2 for driving a first group of elements including a sley device (not shown), a second drive gear wheel 3 for driving a second group of elements including a shed formation device (not shown), a switching gear wheel 4, a holding element 5, a main drive motor 6 with a drive motor gear wheel 7 that engages the switching gear wheel 4, so that the switching gear wheel 4 can be driven to rotate by the main drive motor 6, a brake system 8 for braking the shaft 52 of the main drive motor 6 and the drive motor gear wheel 7, and a blocking device 9 for the second drive gear wheel 3.
  • the shed formation device driven by the second drive gear wheel 3 can be a known cam system, a dobby system, or a jacquard system.
  • FIG. 5 shows in part the drive system 1 of FIG. 1 mounted to a weaving machine in a perspective view.
  • FIG. 6 shows the drive system 1 of FIG. 1 with a blocking device housing 12 and a frame part 13 of a frame of the weaving machine in a perspective view.
  • the blocking device housing 12 is fixed with bolts 40 to an intermediate frame part 41 that is fixed to the frame part 13 using bolts (not shown).
  • the switching gear wheel 4 is displaceable between a first position shown in FIGS. 1 and 2 , in which the switching gear wheel 4 is in drive connection with the first drive gear wheel 2 and the second drive gear wheel 3, and a second position shown in FIGS. 3 and 4 , in which the switching gear wheel 4 is not in drive connection with the first drive gear wheel 2.
  • the holding element 5 is axially displaceable with the switching gear wheel 4. As shown in FIGS. 3 and 4 , in the second position of the switching gear wheel 4, the holding element 5 engages with the first drive gear wheel 2 for holding the first drive gear wheel 2 against rotation. In the first position of the switching gearwheel 4, as shown in FIGS. 1 and 2 , the holding element 5 is disengaged from the first drive gear wheel 2.
  • the holding element 5 and the switching gear wheel 4 are coupled to a drive arm 10 and are conjointly displaceable by means of a displacement device 11 (shown schematically).
  • a displacement device 11 is for example known from US 5617901 or US 7857011 , which are herewith incorporated by reference.
  • the second drive gear wheel 3 is in drive connection with the switching gear wheel 4 in the first position and in the second position of the switching gear wheel 4.
  • the main drive motor 6 can be operated to move the second group of elements, for example for removing a broken weft thread.
  • the blocking device 9 can be activated for blocking a rotation of the second drive gear wheel 3 while the second drive gear wheel 3 is in standstill, i.e. before, during and after a displacement of the switching gear wheel 4 between the first position and the second position.
  • FIGS. 7 and 8 show in a perspective view the blocking device 9 and a part of the second drive gear wheel 3 of the drive system 1 of FIG. 1 , while the blocking device 9 is activated and while the blocking device 9 is not activated, respectively.
  • FIGS. 9 to 10 show in sectional views the blocking device 9 and the second drive gear wheel 3.
  • the blocking device 9 comprises a lever 14 having a tooth 15 for engaging with teeth 16 of the second drive gear wheel 3.
  • the lever 14 is mounted swivellable about a swivel axis 17 of the lever 14, which swivel axis 17 is extending in parallel to the rotation axis 18 (see FIGS: 1 to 4 ) of the second drive gear wheel 3 between a blocking position shown in FIGS. 2 , 3 , and 7 , in which the tooth 15 engages with the second drive gear wheel 3, and a rest position shown in FIGS. 1 , 4 , and 8 , in which the tooth 15 is disengaged from the second drive gear wheel 3.
  • FIG. 12 shows the lever 14 in isolation.
  • the tooth 15 is provided at a side face 19 of the lever 14 facing the teeth 16 of the second drive gear wheel 3.
  • the tooth 15 is arranged for engaging with a tooth cavity between two teeth 16 of the second drive gear wheel 3.
  • the blocking device 9 further comprises an axially displaceable piston 20 extending in parallel to the swivel axis 17 of the lever 14.
  • a first end 21 of the piston 20 is mounted in the blocking device housing 12 and a second end 22 of the piston 20 is mounted in a frame part 13 of the weaving machine, wherein the first end 21 of the piston 20 is moveably mounted in a first fluid chamber 24 provided in the blocking device housing 12, which can be filled with a hydraulic fluid for moving the piston 20 away from the blocking device housing 12, and the second end 22 of the piston 20 is moveably mounted in a second fluid chamber 25 provided in the frame part 13, which can be filled with the hydraulic fluid for moving the piston 20 away from the frame part 13.
  • a supply duct 26 for the hydraulic fluid, in particular oil is formed in the blocking device housing 12, which leads to a valve 27.
  • the valve 27 is selectively operable to supply the hydraulic fluid via a first fluid duct 28 to the first fluid chamber 24, or via a second fluid duct 29, an intermediate annular ring 42 in the blocking device housing 12, a radial duct 43, and an axial duct 44 in the piston 20 to the second fluid chamber 25.
  • a drain duct 30 is provided, which is closed by a drain screw 31 (see FIGS. 7 to 10 ).
  • the piston 20 cooperates with the lever 14 so that by an axial displacement of the piston 20 the lever 14 is swivellable between the blocking position shown in FIGS. 2 , 3 , 7 and 10 and the rest position shown in FIGS. 1 , 4 , 8 and 9 .
  • the lever 14 is provided with a passage aperture 32 offset from the swivel axis 17 of the lever 14.
  • a fork-shaped lever 14 having two prongs 33 is provided, wherein the passage aperture 32 is formed between the two prongs 33 and has an open side.
  • the piston 20 extends through the passage aperture 32 of the lever 14.
  • the passage aperture 32 has two slanting surfaces 34 (see FIG. 12 ) and the piston 20 has two slanting surfaces 35 (see FIG. 11 ).
  • the slanting surfaces 34, 35 can cooperate with each other, so that an axial displacement of the piston 20 causes the lever 14 to swivel about the swivel axis 17 of the lever 14, which extends in parallel to the piston 20.
  • the movement of the piston 20 causes the tooth 15 at the lever 14 to engage or disengage with the second drive gear wheel 3.
  • the blocking device 9 further comprises a sensor system 36 for sensing whether or not the blocking device 9 is activated.
  • the sensor system 36 is a proximity sensor system, for example an optical proximity sensor system or an inductive sensor system, comprising a detector 37 and a target 38.
  • the target 38 can be mounted to an opening 39 (see FIG. 12 ) in the lever 14.
  • the target 38 is a shaft screwed in the opening 39.
  • the detector 37 is arranged stationary in the blocking device housing 12, in a position so that the target 38 can be detected when the blocking device 9 is activated and the lever 14 is in the blocking position as shown in FIGS. 7 and 10 . As shown in FIGS. 8 and 9 , when the lever 14 is in the rest position, the target 38 is moved out of a range of the detector 37.
  • An output of the sensor system 36 can be displayed on a monitor (not shown) of the weaving machine and/or transmitted to a control system (not shown) of the weaving machine.
  • the brake system 8 and the main drive motor 6 are activated for stopping the weaving machine for a pick finding.
  • the blocking device 9 can be activated to engage with the second drive gear wheel 3 as shown in FIG. 2 .
  • the activation of the main drive motor 6 for holding the switching gear wheel 4 in position can be reduced, wherein the blocking device 9 blocks the second drive gear wheel 3.
  • the displacement device 11 can be activated for moving the switching gear wheel 4 into the second position shown in FIG. 3 , in which the switching gear wheel 4 is no longer in drive connection with the first drive gear wheel 2, and the holding element 5 engages with the first drive gear wheel 2.
  • the activation of the main drive motor 6 for holding the switching gear wheel 4 in position is enhanced, so that the blocking device 9 can be deactivated to release the second drive gear wheel 3 as shown in FIG. 4 , and the main motor 6 can be driven in slow-motion to move the second drive gear wheel 3 and the second group of elements including the shed formation device coupled thereto for pick finding to another position, for example a position allowing to remove a weft thread.
  • the drive system 1 is moved again to the pick finding position and the blocking device 9 again engages with the second drive gear wheel 3, whereafter the activation of the main drive motor 6 is reduced again.
  • the displacement device 11 can be activated for moving the switching gear wheel 4 into the first position shown in FIG. 2 , whereafter the activation of the drive motor 6 can be enhanced and thereafter the blocking device 9 can be deactivated to release the second drive gear wheel 3 as shown in FIG. 1 .
  • a normal weaving operation can start.
  • the invention can be used most advantageous when the shed formation device is a known jacquard system, because during pick finding the forces that are exerted on the second drive gear wheel 3 by the shed formation device are the largest when using a jacquard system.
  • a teeth area of the first drive gear wheel 2 is provided with two notches 45 (see FIG. 1 ) running over part of the axial length of the first drive gear wheel 2 and several teeth. Therefore, interrupting the drive connection between the switching gear wheel 4 and the first drive gear wheel 2 is only possible in two defined angular positions of the first drive gear wheel 2.
  • the notches 45 can be provided as known from US 5617901 , which is herewith incorporated by reference.
  • FIG. 13 shows a second embodiment of a blocking device 9 in an activated state.
  • the blocking device 9 shown in FIG. 13 comprises a lever 14 with a tooth 15 for engaging with teeth 16 of the second drive gear wheel 3 (see FIGS. 1 to 10 ).
  • the lever 14 shown in FIG. 13 is also mounted swivellable about a swivel axis 17 and swivellable between a blocking position shown in FIG. 13 , in which the tooth 15 can engage with the second drive gear wheel 3, and a rest position (not shown), in which the tooth 15 is disengaged from the second drive gear wheel 3.
  • FIG. 13 shows a second embodiment of a blocking device 9 in an activated state.
  • the blocking device 9 shown in FIG. 13 comprises a lever 14 with a tooth 15 for engaging with teeth 16 of the second drive gear wheel 3 (see FIGS. 1 to 10 ).
  • the lever 14 shown in FIG. 13 is also mounted swivellable about a swivel axis 17 and swivell
  • the blocking device 9 comprises an excentre 46 for moving the lever 14, which excentre 46 can be swiveled back-and-forth or rotated about an axis of rotation 47 that is parallel to the swivel axis 17 of the lever 14.
  • the excentre 46 is driven using a piston 48 that is mounted transversely to the axis of rotation 47 of the excentre 46 and connected to the excentre 46 via a connecting rod 49.
  • the piston 48 can be driven by a cylinder 50, for example a hydraulic or pneumatic cylinder, that is rotatable around a fixedly arranged axis of rotation 51.
  • the gear wheels 2, 3, 4 and 7 are spur gears or straight-cut gears, wherein all rotation axes of the gear wheels are arranged in parallel, and wherein by movement of the switching gear wheel 4 in parallel to the rotation axis 53 of the first drive gear wheel 2, the switching gear wheel 4 and the first drive gear wheel 2 can engage or disengage.
  • the gear wheels 2, 3, 4 and 7 are helical gear wheels, wherein for engaging or disengaging the switching gear wheel 4 and the first drive gear wheel 2 a movement of the switching gear wheel 4 in parallel to the rotation axis 53 of the first drive gear wheel 2 is combined with a controlled rotation of the switching gear wheel 4, while for example the second drive gear wheel 3 is blocked by the blocking device 9.
  • the tooth 15 can be arranged at an angle with respect to the swivel axis 17 of the lever 14, so that the tooth 15 can engage between two teeth 16 of the second drive gear wheel 3 for blocking the second drive gear wheel 3.
  • the holding element 5 is profiled to cooperate with the helical gears.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP22160778.1A 2022-03-08 2022-03-08 Antriebssystem für eine webmaschine Pending EP4242365A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP22160778.1A EP4242365A1 (de) 2022-03-08 2022-03-08 Antriebssystem für eine webmaschine
BE20230005A BE1030287B1 (nl) 2022-03-08 2023-01-24 Aandrijfsysteem voor een weefmachine met een blokkeerinrichting
PCT/EP2023/051952 WO2023169735A1 (en) 2022-03-08 2023-01-26 Drive system for a weaving machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22160778.1A EP4242365A1 (de) 2022-03-08 2022-03-08 Antriebssystem für eine webmaschine

Publications (1)

Publication Number Publication Date
EP4242365A1 true EP4242365A1 (de) 2023-09-13

Family

ID=80683991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22160778.1A Pending EP4242365A1 (de) 2022-03-08 2022-03-08 Antriebssystem für eine webmaschine

Country Status (3)

Country Link
EP (1) EP4242365A1 (de)
BE (1) BE1030287B1 (de)
WO (1) WO2023169735A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046534A (en) * 1989-06-29 1991-09-10 Picanol N.V., Naamloze Vennootschap Weaving machine with main shaft lock
US5617901A (en) 1995-02-07 1997-04-08 Picanol N.V. Variable drive system for driven loom components
US7857011B2 (en) 2004-07-05 2010-12-28 Picanol N.V. Drive for a web machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046534A (en) * 1989-06-29 1991-09-10 Picanol N.V., Naamloze Vennootschap Weaving machine with main shaft lock
US5617901A (en) 1995-02-07 1997-04-08 Picanol N.V. Variable drive system for driven loom components
US7857011B2 (en) 2004-07-05 2010-12-28 Picanol N.V. Drive for a web machine

Also Published As

Publication number Publication date
BE1030287B1 (nl) 2023-12-15
WO2023169735A1 (en) 2023-09-14
BE1030287A1 (nl) 2023-09-13

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