EP1149941A1 - Motor-driven three-axis friction false twisting device - Google Patents
Motor-driven three-axis friction false twisting device Download PDFInfo
- Publication number
- EP1149941A1 EP1149941A1 EP99973312A EP99973312A EP1149941A1 EP 1149941 A1 EP1149941 A1 EP 1149941A1 EP 99973312 A EP99973312 A EP 99973312A EP 99973312 A EP99973312 A EP 99973312A EP 1149941 A1 EP1149941 A1 EP 1149941A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spindles
- outer rotor
- stator
- motor
- spindle
- 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.)
- Withdrawn
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 description 16
- 238000012423 maintenance Methods 0.000 description 14
- 238000003466 welding Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/04—Devices for imparting false twist
- D02G1/08—Rollers or other friction causing elements
- D02G1/082—Rollers or other friction causing elements with the periphery of at least one disc
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/04—Devices for imparting false twist
- D02G1/06—Spindles
Definitions
- the present invention relates to a motor drive type friction false twisting device provided with three spindles. More specifically, the present invention relates to a motor drive type friction false twisting device provided with three spindles which device may be used in a false twist texturing machine or a draw texturing machine, by which device twists are imparted to a synthetic yarn such as polyester, polyamide and so on and which device is driven by an individual motor.
- a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs mounted thereon and being disposed at apexes of an imaginary triangle so as to locate the peripheries of the friction discs along a helix has been widely used in a draw texturing machine or a false twist texturing machine.
- a tangential belt type device is known as such a friction false twisting device provided with three spindles. More specifically, a running belt is extended along a machine frame of a yarn processing machine such as a draw texturing machine or a false twist texturing machine wherein a plurality of such friction false twisting devices are disposed, and drive whorls of the friction false twisting devices provided with three spindles are pressed to and in contact with the belt so that drive force is transmitted to all the spindles from the whorls so as to rotate the three spindles in the same direction at the same rotational speed.
- the spindles are disposed on a unit base as described above.
- a tangential belt type device wherein a plurality of friction false twisting devices are driven by a single belt, pressing of the whorls of the false twisting devices and running of the drive belt for a long distance are noise generating source.
- the drive whorl is driven by means of frictional engagement between the belt and the whorls, it is very difficult to individually control the false twisting devices so as to eliminate twisting uneveness in a plurality of false twisting devices.
- an individual motor drive type wherein a drive motor is disposed in each false twisting device and the drive motor is functionally connected with the spindles.
- a connecting method connection between the drive motor and the spindles by means of a coupling or connection by means of a timing belt engaging with the timing pulleys, which are secured to an output shaft of the drive motor and one of the spindles.
- Japanese Patent Publication No. Hei 8-19585 proposes that a base of a false twisting device is detachably disposed on a support block movable toward or a support plate swingable toward a drive motor which is fixed to the spindle mount of a textile texturing machine, that they are moved toward the drive motor together with the base of the false twisting device upon detachment of spindles, whereby a belt wrapping about the drive motor and the spindle is brought into a slackened condition, and that under this condition, the toothed belt having been wrapped about the drive motor and the spindle is detached, and then, the false twisting device is taken out upwardly together with the base.
- Japanese Patent No. 2657539 proposes a false twist texturing device for producing a textured synthetic yarn
- a texturing device head including a friction disc assembly and an electric motor block including an electric motor for driving the friction disc assembly
- a spindle of the friction disc assembly being supported in a cantilever fashion by the texturing device head via a bearing so as to protrude from the texturing device head, the spindle has a rotor of the electric motor at the portion thereof protruding from the texturing device head, and a stator of the electric motor is fixed within the electric motor block.
- the adjusting problem of frictional engagement between the drive motor and the spindle can be obviated since the spindle is directly driven from the electric motor.
- the false twisting device disclosed in the Japanese Patent No. 2657395 has a construction wherein the rotor is rotated within the inside of the cylindrical stator, and the rotor has a small diameter and accordingly small moment of inertia. Since the moment of inertia is small as described above, there is a problem with respect to stability of the rotating speed and uneveness in twisting.
- Figs. 1 and 2 of the Japanese Patent No. 2657395 disclose an embodiment of a friction false twisting device provided with three spindles.
- lines 4 to 8 in Column 5 of the official gazette describes that "Reference numeral 7 denotes a toothed belt wheel, via a toothed belt wrapping about the toothed belt wheel, drive of the spindles 8 and 9 is performed.”
- no toothed belt is illustrated in the drawings.
- a member for supporting three spindles has a projection at the lower end thereof, and the projection is engaging with a shoulder of a recess formed in the block so as to position the stator 4 and the rotor 3 of the electric motor at a predetermined position.
- United States Patent No. 4,899,533 which is a United States counterpart of said Japanese Patent No. 2657539, it discloses an arc portion 20 projecting from the lower end of the motor guide in Fig. 2, and lines 45 to 50, in column 3 of its specification read "There is a toothed disc 7 on the shaft 1 above the rotor from which the shafts 8 and 9 are driven by the endless belt 20 that wraps around the disc 7 and around corresponding discs on the shafts 8 and 9.
- the belt 20 may be a gear belt or a toothed belt and a round or a flat belt.”
- a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket, characterized in that the drive motor is a radial gap type outer rotor brushless motor.
- each false twisting device is driven by an individual motor, and no tangential belt is used, generation of noise can be highly decreased. Further, when the operating conditions of the individual motors for respective work stations are changed, adjustment of the false twisting conditions for respective work stations can be achieved easily.
- a radial gap type outer rotor brushless motor is used as a drive motor.
- a rotor can be constructed with permanent magnets, and accordingly, wound wire can be omitted from the outer rotor and such a disposition as wound wire can be gathered at the stator side. Therefore, the present invention is appropriate for a device wherein the outer rotor can be detachably installed.
- the present invention uses a radial gap type outer rotor brushless motor, the rotor is located at the outside and has a large diameter, and accordingly, a large moment of inertia. Therefore, it is beneficial for rotation at a constant speed. Further, since magnets, i.e., permanent magnets, are disposed in the rotor having a large diameter, the size of the magnets can be relatively large. Accordingly, the present invention can exert high efficiency and high torque, and it is effective as a device for false twisting a thick yarn. In addition, since the stator is located at the inner position, the resistance of its wire can be small, and the copper loss of the drive motor can be reduced. Therefore, the drive motor and accordingly, the false twisting device, can easily become of high efficiency.
- a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket, characterized in that the drive motor is a radial gap type outer rotor brushless motor, and the outer rotor of the brushless motor is formed in a bell shape, and the outer rotor is fixed to an end of one of the spindles so that it covers the peripheral outside and the spindle side end of the stator of the brushless motor forming a small clearance therebetween and that the peripheral portion of the outer rotor and the peripheral potion of the stator are magnetically connected with each other.
- the brushless motor used in the invention is a radial gap type outer rotor brushless motor, it is not provided with any shaft within the outer rotor not like a conventionally known outer rotor brushless motor. More specifically, the outer rotor of the brushless motor according to the present invention is formed in a so-called bell shape and has cavity inside thereof, and the cavity portion is covered over the stator forming a small clearance therebetween.
- the outer rotor of the present invention does not require any bearings between it and the stator, and accordingly, it achieves a further advantage that the outer rotor can be secured easily in addition to those described above.
- a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket, characterized in that the spindle mount and the bracket have engaging portions mounted thereon, respectively, at positions away from positions where the rotor and the stator of the drive motor are disposed, and the drive motor is a radial gap type outer rotor brushless motor.
- the rotor guide member supporting the spindles and the electric motor block are engaged with each other by means of convex portion and concave portion formed around the stator and the rotor. Accordingly, when it is tried to be carried out in the false twisting device provided with three spindles, their driving connection cannot be realized. Contrary to this, according to the present invention, taking into consideration the problems inherent in the Japanese Patent No. 2657539 and easiness in assembling operations, the engaging portions are formed in the spindle mount and the bracket, respectively, independently and separately from the rotor and the stator of the drive motor at positions away from positions where the rotor and the stator of the drive motor are disposed.
- the rotor i.e., the outer rotor
- the motor disposed on the spindle mount is positioned at a predetermined position relative to the stator of the motor mounted on the bracket, and their positioning can readily be performed. Further, under the condition thus positioned, the clearance between the outer rotor and the stator of the brushless motor of an outer rotor type can be a predetermined amount, and accordingly, a desired magnetic connection can be formed between them.
- the three spindles may have pulleys at ends thereof, respectively, and the three spindles are rotated in the same direction at the same speed by means of a drive belt wrapping about the three pulleys. Since the present invention is constructed as described above, even when the three spindles have pulleys at ends thereof, the device according to the present invention can be realized without any difficulty. In short, since the present invention does not use the lower portion of the spindle mount as a portion for engaging with the bracket, this area is open sufficiently, and accordingly, driving pulley can be disposed at this area.
- the three spindles are supported at ends thereof opposite to the pulleys by a top plate, whereby the three spindles are supported by the top plate and the spindle mount at both the ends thereof. According to this construction, since the spindles are supported at both the ends thereof, the operating speed of the device can be further enhanced.
- a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being disposed on a bracket detachably in a lateral direction, characterized in that the spindle mount has a stator of a radial gap type outer rotor brushless motor mounted at the lower surface thereof, an outer rotor is supported rotatable about the stator, the stator and one of the three spindles are operably connected, the three spindles have pulleys at the lower ends thereof, respectively, and the pulleys are connected by a drive belt.
- the three spindles having a plurality of friction discs are rotatably supported on a spindle mount, and the spindle mount is disposed on a bracket detachably in a lateral direction. Accordingly, upon its dismounting, it does not abut with nor damage other parts which are mounted on a false twist texturing machine or draw texturing machine, and the dismounting operation can be done easily. Thus, there does not occur any trouble which has been caused by upward lifting of the main portion of a false twisting device.
- a radial gap type outer rotor brushless motor is used as an individual drive motor. Therefore, the reliability of the drive motor is high, and it is unnecessary for the drive motors to be subjected to maintenance or repair service while they are being mounted on a false twist texturing machine or a draw texturing machine.
- the construction wherein the spindle mount is dismount laterally relative to the bracket while it has the drive motor mounted thereon can be applied.
- the drive motor requires maintenance or adjustment service, it is first dismount from a false twist texturing machine or a draw texturing machine and then is subjected to the maintenance or repair service. Thereafter, it is mounted in a lateral direction while it has a drive motor mounted thereon.
- the spindle mount has a stator of a radial gap type outer rotor brushless motor mounted thereon, while an outer rotor is supported rotatable about the stator, the stator and one of the three spindles are operably connected, the three spindles have pulleys at the lower ends thereof, respectively, and the pulleys are connected by a drive belt. Therefore, the construction becomes compact, and the spindle mount can be dismounted or attached in a lateral direction relative to the bracket while it has the drive motor mounted thereon.
- a radial gap type outer rotor brushless motor is used as a drive motor.
- a rotor can be constructed by permanent magnets, and accordingly, wound wire can be omitted from the outer rotor and such a disposition as wound wire can be gathered at the stator side.
- the present invention uses a radial gap type outer rotor brushless motor, the rotor is located at the outside and has a large diameter, and accordingly, a large moment of inertia. Therefore, it is beneficial for rotation at a constant speed. Further, since magnets, i.e., permanent magnets, are disposed in the rotor having a large diameter, the size of the magnets can be relatively large. Accordingly, the present invention can exert high efficiency and high torque, and it is effective as a device for false twisting a thick yarn. In addition, mean value of wound wire per a coil of the stator becomes short, and the copper loss can be reduced, and therefore, the drive motor and accordingly, the false twisting device, can easily become of high efficiency.
- the present invention provides a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, characterized in that the spindle mount has a stator of a radial gap type outer rotor brushless motor at the lower surface thereof, the stator having a hollow hole extending in an axial direction, one of the three spindles passing through the hollow hole has an outer rotor of the outer rotor brushless motor and a pulley at a lower end thereof, the other two of the three spindles have pulleys correspondingly to the pulley, and a drive belt is engaged around the pulleys.
- the lower end of one spindle having a plurality of discs passes through the stator, the entire construction of the false twisting device can be compact while the diameter of the outer rotor can be enlarged. Further, the driving construction from the drive motor to the spindles can be simple.
- bearings may be disposed at the inside of the radial gap type outer rotor brushless motor and the spindle mount, respectively, and one of the three spindles may be rotatably supported by a pair of bearings.
- this construction since the spindle is supported by a pair of bearings, its rotation becomes stable, and its high speed rotation becomes possible.
- the present invention provides a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, characterized in that the spindle mount has a stator of a radial gap type outer rotor brushless motor at a position which correspond to none of the three spindles on the lower surface thereof, an outer rotor is supported rotatable about the stator, the three spindles pass through the bracket of the spindle mount and have pulleys at lower ends thereof, and a drive belt is engaged around the pulleys secured to the three spindles and the pulley secured to the outer rotor.
- the three spindles may be driven as follows. More specifically, the three spindles may have pulleys at the lower ends thereof, respectively, and a drive belt may be engaged with the three spindles. Alternatively, one of the three spindles may have pulleys vertically overlaid at a lower end thereof, and the other spindles may have pulleys corresponding to the vertically overlaid pulleys, respectively, and drive belts may be engaged with the vertically overlaid pulleys and the other pulleys, respectively.
- a bracket formed in a substantially U-shape is secured to a friction beam 6 of a false twist texturing machine or a draw texturing machine by means of bolts (not shown).
- the bracket 5 is formed in a substantially U-shape as illustrated in Fig. 2, and its upper side 5a is shorter than its lower side 5b.
- the upper side 5a is formed in a semi-circular shape 5c as illustrated in Fig. 2 so that an outer rotor 11 of a radial gap type outer rotor type brushless motor is not prevented from its installing and detaching operations. In other words, vertical movement of the outer rotor 11 can be done readily.
- the lower side 5b of the bracket 5 is formed in an adequate shape such as a rectangular shape.
- the bracket 5 has a stator 12 of the outer rotor type brushless motor 10 mounted on and secured to the lower side 5b thereof.
- the stator 12 is formed by laminated iron cores having a wire wound thereon and has a substantially circular cylinder shape.
- the wound wire of the stator 12 is supplied with drive electric current by means of a wire extending from a power source (not shown) for brushless motors 10 of the false twist texturing machine or draw texturing machine through the friction beam 6 to the stator 12 in a known method.
- the outer profile of the stator 12 can be observed from the outside unless the outer rotor 11 which will be described later has not been covered thereon, and accordingly, the disposing position of the stator 12 on the lower side 5b of the bracket 5 and its positional relationship relative to the outer rotor 11 can be accurately positioned by visually checking them. Consequently, compared to the false twisting device disclosed in the above-described Japanese Patent No. 2657539 wherein the stator is accommodated within the electric motor block, their positioning can be done more accurately.
- the bracket 5 has engaging projection 5d which serves to position the spindle mount 20 projecting from the upper side 5a thereof at the center thereof seen in the lateral direction of and adjacent to the friction beam 6.
- the engaging portion 5d is formed in a projection of trapezoid.
- the spindle mount 20 has a recess 20a formed in a trapezoid as another engaging portion which engages with the projecting portion 5d formed on the upper side 5a of the bracket 5 formed therein.
- the vertical positioning of the spindle mount 20 and the bracket 5 can be achieved by the upper surface of the upper side 5b of the bracket 5 and the lower surface of the spindle mount 20.
- Screw holes 5e with each of which a clamping bolt 30 such as a hexagon socket set screw is engaged is formed in the bracket 5, and holes 20b for inserting the clamping bolts 30 are formed in the spindle mount 20.
- the clamping bolts 30 are inserted through the holes 20b formed in the spindle mount 20, and the ends of the clamping bolts 30 are screwed with the tapped holes 5e formed in the bracket 5, and thus, the spindle mount 20 is secured to the bracket 5 at a predetermined position.
- one engaging portion may be formed as locating pins (not shown) projecting upwardly from the upper surface of the bracket 5
- the other engaging portion may be formed as pin holes with which the locating pins engage and which are formed in the spindle mount 20.
- the numbers of the locating pins and the pin holes are set two, respectively, the positioning of the spindle mount 20 and the bracket 5 is assured.
- the spindle mount 20 is suitably secured to the bracket 5 by means of the engagement between the locating pins and pin holes, the clamping bolts which has been described above may be omitted.
- the spindle mount 20 has a certain thickness in the vertical direction as illustrated in Figs. 1 and 2, and in this embodiment, as illustrated in Figs. 3(a) and 3(b), it is shaped in a substantially pentagon. As illustrated in Fig. 3(a), the spindle mount 20 has three spindles 21, 22 and 23 accurately disposed thereon at positions corresponding to the apexes of an equilateral triangle. As illustrated in Fig. 2 with respect to the spindle 21, the three spindles 21, 22 and 23 are rotatably supported by bearings 25 located at upper and lower portions, respectively.
- the spindles 21-23 have a plurality of friction discs 27 mounted thereon, respectively.
- the friction disc 27 is made of a material such as ceramic or polyurethane which has resistance to wear and which can hold yarn to be twisted well as it is common in a known friction false twisting device.
- the spindle 21 has a toothed pulley 31 mounted at the portion thereof projecting from the bearing 25, and the spindles 22 and 23 have toothed pulleys 32, 33 mounted thereon, respectively.
- a toothed belt 35 is wrapped around the toothed pulleys 31, 32 and 33 in such a manner that it surrounds their outer peripheries in a triangular shape.
- the spindle 21 has an outer rotor 11 formed in a bell shape mounted at a position thereof below the toothed pulley 31. More specifically, the outer rotor 11 comprises a circular cylindrical portion 11a and an end plate 11b covering the upper end of the circular cylindrical portion 11a to form a bell shape and does not have any shaft within the inside thereof.
- the outer rotor 11 has permanent magnets (not shown) equidistanly disposed in a peripheral direction within the inside of the circular cylindrical portion 11a.
- a hole 11c for inserting and securing the lower end of the spindle 21 is formed at the center of the end plate 11b with positioning accuracy and precise size.
- the outer rotor 11 is precisely secured to the spindle 21.
- the outer rotor 11 is accurately secured to the spindle 21 which is supported on the spindle mount 20, and thus, the positioning accuracy between the spindle mount 20 and the bracket 5 can be achieved by engaging the engaging portions 5d and 20a of the spindle mount 20 and bracket 5. Accordingly, positioning accuracy between the outer rotor 11 and the stator 12 is also achieved.
- the inner surface of the circular cylindrical portion 11a of the outer rotor 11 and the inner surface of the upper end plate 11b form small clearances relative to the outer surface and the upper surface of the stator 12 secured to the bracket 5, and rigid magnetic connection is formed between the rotor and the stator of the radial gap type outer rotor brushless motor.
- the spindle mount 20 has two locating pins 20b (see Fig. 3(b)) projecting therefrom at a side of the spindles 21-23.
- a column 52 formed in a regular prism has holes 52a at the bottom thereof. The holes 52a are inserted onto the locating pins 20b, and thus, as illustrated in Figs. 1 and 2, the column 52 is standing on the spindle mount 20 at the side of the spindles 21-23.
- a top plate 51 formed in a substantially triangular shape is screwed at the top of the column 52 by means of a bolt 53.
- the top plate 51 has three bearings 54 (see Fig.
- the top plate 51 formed in a substantially triangular shape has a threading slit 51b formed at one end thereof, and a yarn guide bracket provided with a yarn guide 61 is disposed swingable about a pin 63 above the threading slit 51b of the top plate 51.
- the yarn guide 61 is made of a material having resistance to wear, such as ceramic, and is formed in a C-shape.
- the spindle mount 20 has recess 20c with a narrow width formed therein at the same side as the above-described threading slit 51b formed in the top plate 51 so that the yarn passing by the friction discs 27 mounted on the three spindles 21-23 is withdrawn to the outside while it avoids the brushless motor 10 of the radial gap type outer rotor.
- the recess 20c is located at the central position of the three spindles 21-23 at the top of the spindle mount 20 as illustrated in Fig. 2, and then, it inclines outwardly.
- the spindle mount 20 has a detecting device (not shown) for detecting the rotating speed of the outer rotor 11 mounted therein.
- the spindle mount 20 having three spindles 21, 22 and 23 with a plurality of friction discs 27 rotatably mounted thereon at the apexes of an imaginary equilateral triangle is put on the upper side 5a of the bracket 5 in such a manner that it covers the bracket 5 from the above, and while the recess 20a of the spindle mount 20 and the engaging portion 5d formed at the upper surface of the bracket 5 are engaged with each other, the locating bolts 30 are inserted into the holes 20b formed in the spindle mount 20, and the ends of the locating bolts 30 are screwed to the tapped holes 5e formed in the bracket 5.
- the spindle mount 20 can be readily secured to the bracket 5 at a predetermined position.
- the inner surface of the circular cylindrical portion 11a and the upper inside surface of the end plate 11b of the outer rotor 11 attached to the end of the spindle 21 which is supported on the spindle mount 20 form small clearances between them and the outer surface and the upper end surface of the stator which is attached to the bracket, and a rigid magnetic connection between the rotor and the stator in a radial type outer rotor brushless motor is formed between the outer rotor 11 and the stator 12.
- the outer rotor 11 is rotated in a manner similar to an ordinary brushless motor, and the rotation of the outer rotor 11 is transmitted to the spindles 21-23.
- the present invention uses a radial gap type outer rotor brushless motor 10, the rotor 11 is located at the outside, has a large diameter and accordingly, a large moment of inertia. Therefore, it is beneficial for rotation at a constant speed. Further, since magnets, i.e., permanent magnets, are disposed in the rotor 11 having a large diameter, the size of the magnets can be relatively large. Accordingly, the present invention can exert high efficiency and high torque, and it is effective as a device for false twisting a thick yarn. In addition, since the stator is disposed at the inner side, its wire has low resistance, and the copper loss can be reduced. Therefore, the drive motor and accordingly, the false twisting device, can easily become of high efficiency.
- the spindle mount 20 of the present invention When the spindle mount 20 of the present invention is required to be detached from the bracket 5, the locating bolt 20 is taken out, and the spindle mount 20 is upwardly withdrawn in a vertical direction.
- the spindle mount 20 having three spindles 21, 22 and 23 provided with a plurality of friction discs 27, respectively, rotatably mounted thereon at apexes of an imaginary equilateral triangle can be easily taken out from the bracket 5.
- another spindle mount 20 which has been prepared separately and which has three spindles 21, 22 and 23 provided with a plurality of friction discs 27, respectively, rotatably mounted thereon at the apexes of the imaginary equilateral triangle may be installed in a manner described above, alternatively, the taken out spindle mount may be installed in a manner described above after it is cleaned up or after it is disassembled and is subjected to a maintenance service.
- a stationary bracket 106 is fixedly disposed on a machine frame of a false twist texturing machine or a draw texturing machine.
- the stationary bracket 106 has a pair of rods 117a and 117b (Fig. 4 and Fig. 5(a) designate them only by their central lines) projecting in parallel in a horizontal direction from a side thereof.
- the rod 117a has a groove which serves as an engaging portion (not shown) formed at the front end thereof.
- a spindle mount 120 has a pair of through holes (not shown) formed corresponding to the rods 117a and 117b in a horizontal direction at a side thereof, into which holes the rods 117a and 117b projecting from the stationary bracket 106 can be inserted. Further, the spindle mount 120 has a lock member(not shown) which is manually operable about an axis disposed near one of the holes.
- the spindle mount 120 When the through holes formed in the spindle mount 120 are inserted onto the rods 117a and 117b, the engaging portion formed at the front end of the rod 117a protrudes outward from the spindle mount 120.
- the lock member engages with the engaging portion formed at the protruding portion of the rod member 117a, and thus, the spindle mount 120 can be integrally secured to the stationary bracket 106.
- the lock member is manually turned in a direction opposite to that described above, the engagement between the lock member and the engaging portion of the rod member 117a can be disengaged, and thus, the spindle mount 120 can be laterally withdrwan in a horizontal direction, i.e., to the right in Fig. 4, from the stationary bracket 106.
- the spindle mount 120 has vertical spindles 132a, 132b and 132c rotatably mounted thereon.
- Each spindle 132a, 132b or 132c has a plurality of (three in the illustrated embodiment) friction discs 131 mounted thereon, and the three spindles 132a, 132b and 132c are located at apexes of an imaginary equilateral triangle seen in a plan view or a bottom view.
- the friction disc 131 is made of a material such as ceramic, polyurethane which has resistance to wear and which can hold well a yarn to be twisted.
- the spindle mount 120 has a reverse L-shape when it is seen in a front view as illustrated in Fig. 4.
- the spindle mount 120 has a circular hole 120a formed at a thin portion thereof, and a bearing 125 is disposed within the hole 120a.
- One spindle 132a of the above-described three spindles which is adjacent to the stationary bracket 106 is rotatably supported by the bearing 125.
- the spindle mount 120 has the other spindle 132b and 132c rotatably mounted at the thick portion thereof via bearings (not shown).
- the spindle mount 120 has a column 152 (Fig. 5) projecting upwardly from the surface thereof, which has a top plate 151 attached thereto by a set screw 153 so that the top portions of the spindles 132a, 132b and 132c are supported thereby.
- the spindle mount 120 has a stator 112 of a radial gap type outer rotor brushless motor 110 mounted coaxially with the spindle 132a at the thin portion thereof.
- the stator 112 of this embodiment is formed in a hollow circular cylinder shape, the body comprises laminated iron cores having coils wound thereon.
- the wound coils are supplied with power drive source in accordance with a known method from the power source (not shown) for the brushless motor 110 of the false twist texturing machine or draw texturing machine through the stationary bracket 106 and an electric wire connected to the stator 112.
- the hollow circular cylindrical shaped stator 112 has a top portion 112a and a flange portion 112b, the outer diameter of which is larger than the top portion 112a, and a shoulder portion is formed between the top portion 112a and the flange portion 112b.
- the top portion 112a has such a size that it engages with a circular hole 120a formed in the spindle mount 120.
- the flange portion 112b of the stator 112 is formed below the top portion 112a.
- the top portion 112a of the stator 112 is inserted into the circular hole 120a from the side opposite to the spindle 132a, i.e., from the below, so that the shoulder of the flange portion 112b formed below the top portion 112a of the stator 112 is engaged with the thin portion of the spindle mount 120. Under this condition, the flange portion 112b is secured to the spindle mount 120 by bolts 113. Thus, the hollow circular shaped stator 112 is secured to the lower surface of the thin portion of the spindle mount 120 coaxially with the circular hole 120a.
- the lower end of the spindle 132a passes through the hollow portion of the stator 112 from the circular hole 120a of the spindle mount 120, while the lower ends of the spindles 132b and 132c pass through the spindle mount 120.
- the spindle 132 has an outer rotor 111 of the radial gap type outer rotor brushless motor at a lower end thereof which passes through the hollow portion of the stator 112.
- the outer rotor 111 is formed in a reverse bell shape. More specifically, the outer rotor 111 comprises a circular cylindrical portion 111a and an end plate 111b covering the lower end of the circular cylindrical portion, and thus, it is formed in a reversely positioned bell shape.
- the outer rotor 111 has permanent magnets (not shown) equidistantly disposed at the inner side of the circular cylindrical portion 111a.
- a hole 111c into which the lower end of the spindle 132 is inserted and secured to is formed at the center of the end plate 111b at the accurate position with a precise dimension.
- the lower end of the spindle 121 is inserted into the hole 111c formed at the center of the end plate 111b and is secured by means of an appropriate means such as adhesive, welding ⁇ , pressure welding or screw cramping, and thus the outer rotor 111 can be accurately positioned to the spindle 121.
- the spindles 132a, 132b and 132c have pulleys 140, respectively, at the lower ends thereof.
- a spindle drive belt 141 which is constructed by an endless belt wraps around the pulleys 140.
- the pulley 140 is a toothed pulley
- the spindle drive belt 141 is a toothed belt.
- the spindle mount 120 has a narrow cavity 120c formed at a side thereof same as that of the threading slit (not shown) formed in the top plate 151 for withdrawing a yarn, which has passed through the friction discs 131 mounted on the three spindles 132a, 132b and 132c, to the outside avoiding the radial gap type outer rotor brushless motor 110. As illustrated in Fig. 5, the cavity 120c reaches at the center of the three spindles 132a, 132b and 132c at the top of the spindle mount 120, and from there it is inclined downwardly and outwardly. Further, the spindle mount 120 has a detecting means (not shown) for detecting the rotation of the outer rotor 111.
- the spindle 132a having the outer rotor 111 of the radial gap type outer rotor brushless motor 110 mounted thereon and the other spindles 132b and 132c have pulleys 140 at the same level at the lower ends thereof, respectively, and one single drive belt 141 is wrapped around the three pulleys. As illustrated in Fig.
- one 132a of the three spindles may have vertically overlaid pulleys 140' at the lower end thereof, while the remaining two spindles may have pulleys 140 corresponding to one of the vertically overlaid pulleys, respectively, and drive belts 141 and 141' may be wrapped between one of the overlaid pulleys and the pulley 140, respectively.
- the three spindles 132a, 132b and 132c having a plurality of friction discs 131 mounted thereon are rotatably supported on the spindle mount 120, and the spindle mount 120 is laterally mounted and dismounted relative to the stationary bracket 106.
- a radial gap type outer rotor brushless motor 110 is used as an individual drive motor of a false twisting device. Accordingly, the reliability of the drive motor is high, and it is unnecessary for the drive motors to be subjected to maintenance or repair service while they are being mounted on a false twist texturing machine or a draw texturing machine.
- the construction wherein the spindle mount 120 is dismount laterally relative to the stationary bracket 106 while it has the drive motor mounted thereon can be applied.
- the drive motor requires maintenance or adjustment service, it is first dismount from a false twist texturing machine or a draw texturing machine and then is subjected to the maintenance or repair service. Thereafter, it is mounted in a lateral direction while it has a drive motor mounted thereon.
- Fig. 6(a) is a bottom view of another embodiment of the present invention
- Fig. 6(b) is a bottom view of a still other embodiment of the present invention.
- the spindle mount 120 has the stator 112 of the radial gap type outer rotor brushless motor 110 mounted at the lower surface thereof, and the stator 112 has the hollow through hole axially extending.
- One 132a of the three spindles is passed through the hollow through hole of the stator 112 and has the outer rotor 111 of the outer rotor brushless motor 110 and the pulley 140 or 140' mounted at the lower end thereof, while the remaining two 132b and 132c of the three spindles have pulleys 140 corresponding to the pulley 140 or 140' mounted thereon, respectively, and the pulleys 140 and 140' are wrapped by the drive belt or belts.
- the spindle mount 120 has a stator 112 of a radial gap type outer rotor brushless motor 110 mounted at the lower surface thereof at a position which does not correspond to any of three spindles 132a, 132b and 132c (in Figs. 6(a) and (b), at the center of the three spindles), while an outer rotor 111 is supported rotatably around the stator 12, and the three spindles 132a, 132b and 132c penetrate through the spindle mount 120.
- a spindle 114 is rotatably supported in the hollow portion of the stator 112.
- the spindle 114 has an outer rotor 111 of the radial gap type outer rotor brushless motor 110 at a lower end thereof which passes through the hollow portion of the stator 112.
- the outer rotor 111 is formed in a reverse bell shape. More specifically, the outer rotor 111 comprises a circular cylindrical portion 111a and an end plate 111b covering the lower end of the circular cylindrical portion, and thus, it is formed in a reversely positioned bell shape.
- the outer rotor 111 has permanent magnets (not shown) equidistantly disposed at the inner side of the circular cylindrical portion 111a.
- a hole 111c into which the lower end of the spindle 114 is inserted and secured to is formed at the center of the end plate 111b at the accurate position with a precise dimension.
- the lower end of the spindle is inserted into the hole 111c formed at the center of the end plate 111b and is secured by means of an appropriate means such as adhesive, welding, pressure welding or screw cramping, and thus the outer rotor 111 can be accurately positioned to the spindle 114.
- the spindle 114 has a pulley 140" mounted at the lower end thereof, one of the spindles 132a, 132b and 132c has vertically overlaid pulleys 140' mounted at the lower end thereof, while the remaining two spindles 132b and 132c have pulleys 140 at the lower ends thereof, respectively.
- the pulley 140" mounted on the spindle 114 and one of the vertically overlaid pulleys 140' are connected to each other by means of a drive belt 141'. As illustrated in Fig.
- a spindle drive belt 141 which is constructed by an endless belt is wrapped around the other one of the pulleys 140' mounted on the spindle 132a and the pulleys 140 mounted on the spindles 132b and 132c.
- the pulley 140 is a toothed pulley
- the spindle drive belt 141 is a toothed belt.
- the spindle 132a, 132b and 132c have pulleys 140 and 140' at the same level at the lower ends thereof, respectively, and one single drive belt 141 is wrapped around the three pulleys.
- one of the three spindles for example 132a, may have pulleys 143, which are vertically overlaid in three stages, at the lower end thereof, while the remaining two spindles may have pulleys 140 corresponding to either one of the vertically overlaid pulleys 143, respectively, and drive belts 141 and 141" may be wrapped between one of the overlaid pulleys 143 and the pulley 140, respectively.
- a stationary bracket 106 is fixedly disposed on a machine frame of a false twist texturing machine or a draw texturing machine.
- the stationary bracket 106 has a pair of rods 117a and 117b (Figs. 7 and 8 designate them only by their central lines) projecting in parallel in a horizontal direction from a side thereof.
- the rod 117a has a groove which serves as an engaging portion (not shown) formed at the front end thereof.
- a spindle mount 120 has a pair of through holes (not shown) formed corresponding to the rods 117a and 117b in a horizontal direction at a side thereof, into which holes the rods 117a and 117b projecting from the stationary bracket 106 can be inserted. Further, the spindle mount 120 has a lock member(not shown) which is manually operable about an axis disposed near one of the holes.
- the spindle mount 120 When the through holes formed in the spindle mount 120 are inserted onto the rods 117a and 117b, the engaging portion formed at the front end of the rod 117a protrudes outward from the spindle mount 120.
- the lock member engages with the engaging portion formed at the protruding portion of the rod member 117a, and thus, the spindle mount 120 can be integrally secured to the stationary bracket 106.
- the lock member is manually turned in a direction opposite to that described above, the engagement between the lock member and the engaging portion of the rod member 117a can be disengaged, and thus, the spindle mount 120 can be laterally withdrwan in a horizontal direction, i.e., to the right in Fig. 4, from the stationary bracket 106.
- the spindle mount 120 has vertical spindles 132a, 132b and 132c rotatably mounted thereon.
- Each spindle 132a, 132b or 132c has a plurality of (three in the illustrated embodiment) friction discs 131 mounted thereon, and the three spindles 132a, 132b and 132c are located at apexes of an imaginary equilateral triangle seen in a plan view or a bottom view.
- the friction disc 131 is made of a material such as ceramic, polyurethane which has resistance to wear and which can hold well a yarn to be twisted.
- the spindle mount 120 has a hole 120C for disposing an upper bearing mount and a hole 120B for disposing an outer rotor formed from the upper surface thereof.
- the hole 120B for disposing the outer rotor 111 has a circular cross section, the inner diameter of which is larger than that of the outer rotor 111 of the outer rotor brushless motor 110.
- the lower end of the hole 120B for disposing the outer rotor is connected to a hole with a small diameter for disposing a stator, and a shoulder is formed between the hole 120B for disposing the outer rotor and the hole for disposing a stator.
- a stator 112 formed in a hollow circular cylinder of a radial gap type outer rotor brushless motor 110 is attached to the shoulder.
- the stator 112 of this embodiment is formed in a hollow circular cylinder shape, the body comprises laminated iron cores having coils wound thereon.
- the wound coils are supplied with power drive source in accordance with a known method from the power source (not shown) for the brushless motor 110 of the false twist texturing machine or draw texturing machine through the stationary bracket 106 and an electric wire connected to the stator 112.
- the hollow circular cylindrical shaped stator 112 has a top portion 112a and a flange portion 112b, the outer diameter of which is larger than that of the top portion 112a, and a shoulder portion, the diameter of which is so selected that it engages with the hole 120A for disposing the stator, at the bottom surface of the flange portion 112b.
- the shoulder formed between the hole 120B for disposing the outer rotor motor and the hole 120A for disposing the stator is put on the flange portion 112b of the stator 112, and then, the stator 112 is screwed to the spindle mount 120 by means of clamp screws 151 which are inserted from the blow.
- a hole for disposing a bearing is so formed at the lower end of the stator 112 that it is connected to the central hole formed at the center, and the lower bearing 125A is disposed in the bearing disposing hole.
- the lower end of the spindle 132a adjacent to the stationary bracket 106 among the three spindles is rotatably supported by means of the bearing 125A.
- An outer rotor 111 of a radial gap type outer rotor brushless motor 110 formed in a bell shape is disposed over the stator 112 of the spindle 132a.
- the outer rotor 111 comprises a circular cylindrical portion 111a and an end plate 111b covering the top of the circular cylindrical portion, and the circular cylindrical portion has permanent magnets (not shown) equidistantly disposed at the inside thereof.
- a hole 111c into which the spindle 132 is secured to is formed at the center of the end plate 111b at the accurate position with a precise dimension.
- the lower end of the spindle 132a is inserted into the hole 111c formed at the center of the end plate 111b of the outer rotor 111 and is secured to by means of an appropriate means such as adhesive, welding, pressure welding or screw cramping, and thus the outer rotor 111 can be accurately positioned to the spindle 121.
- the upper portion of the outer rotor disposing hole 120B is connected to a circular cross sectioned hole 120C for disposing upper bearing mount, the outer diameter of which is smaller than that of the outer rotor disposing hole 120B and which is slightly larger than that of the outer rotor 111, and the upper bearing mount disposing hole 120C is open at the upper surface of the spindle mount 120.
- the upper bearing mount 150 is disposed within the the upper bearing mount disposing hole 120C.
- the upper bearing mount 150 comprises a body which engages with the upper bearing mount disposing hole 120C and a flange portion 150b formed at and projecting from the top of the body.
- the upper bearing mount 150 is secured to the top surface of the spindle mount 120 by screwing the flange portion 150b by means of set screws 153.
- the upper bearing mount 150 has a circular cross sectioned upper bearing disposing hole 150a formed at the axis thereof, and it supports the upper bearing 125.
- the upper bearing 125 rotatably supports the spindle 132a at the upper portion of the bearing 130A.
- the procedure for assembling this embodiment will now be explained.
- the upper bearing 125 is inserted into the upper bearing disposing hole 150a of the upper bearing mount 150, and the spindle 132a is inserted into the upper bearing 125.
- the rotor 111 is attached to the spindle 132a at the front end relative to the upper bearing 125.
- the stator 112 is supported at the end of the spindle 132a and at the inside of the outer rotor 111 via the lower bearing 125A.
- the stator 112 is disposed into the outer rotor disposing hole 120B from the above of the spindle mount 120 so that the shoulder formed at the bottom of the flange portion 112b of the stator 112 is engaged with the stator disposing hole 120A.
- the upper bearing mount 150 is engaged with the upper bearing mount disposing hole 120C.
- the flange 112b is screwed to the spindle mount 120 by means of set screws 151 which are inserted from the below of the spindle mount 120 so that the stator 112 is secured to the spindle mount 120.
- the flange portion 150b of the upper bearing mount 150 is screwed to the spindle mount 120 by set screws 153 so that the upper bearing mount 150 is secured to the upper surface of the spindle mount 120 together with the spindle 132a.
- the spindle 132a penetrates through the spindle mount 120 while it is rotatably supported by the upper bearing 125 and the lower bearing 125A.
- the spindle mount 120 has spindles 132b and 132c rotatably supported by bearings (not shown) at positions different from the spindle 132a, and the lower ends of the spindles 132b and 132c penetrate through the spindle mount 120.
- the spindles 132a, 132b and 132c have pulleys 140, respectively, at the lower ends thereof.
- a spindle drive belt 141 which is constructed by an endless belt wraps around the pulleys 140.
- the pulley 140 is a toothed pulley
- the spindle drive belt 141 is a toothed belt.
- a top plate 151 is secured to by a set screw 153 at a upper end of a column 152 (Fig. 5) standing upward from the upper surface of the spindle mount 120, and it supports the top portions of the spindles 132a, 132b and 132c.
- the spindles 132a, 132b and 132c are supported at both the ends.
- the spindle mount 120 has a narrow cavity 120c formed at a side thereof same as that of the threading slit (not shown) formed in the top plate 151 for withdrawing a yarn, which has passed through the friction discs 131 mounted on the three spindles 132a, 132b and 132c, to the outside avoiding the radial gap type outer rotor brushless motor 110. As illustrated in Fig. 7, the cavity 120c reaches at the center of the three spindles 132a, 132b and 132c at the top of the spindle mount 120, and from there it is inclined downwardly and outwardly. Further, the spindle mount 120 has a detecting means (not shown) for detecting the rotation of the outer rotor 111.
- a bearing may be disposed at the inside of the stator so that bearings are disposed within the brushless motor of a radial gap type outer rotor and the spindle mount like the present embodiment.
- the spindle 132a having the outer rotor 111 of the radial gap type outer rotor brushless motor 110 mounted thereon and the other spindles 132b and 132c have pulleys 140 at the same level at the lower ends thereof, respectively, and one single drive belt 141 is wrapped around the three pulleys. As illustrated in Fig.
- one 132a of the three spindles may have vertically overlaid pulleys 140' at the lower end thereof, while the remaining two spindles may have pulleys 140 corresponding to one of the vertically overlaid pulleys, respectively, and drive belts 141 and 141' may be wrapped between one of the overlaid pulleys and the pulley 140, respectively.
- the three spindles 132a, 132b and 132c having a plurality of friction discs 131 mounted thereon are rotatably supported on the spindle mount 120, and the spindle mount 120 is laterally mounted and dismounted relative to to the stationary bracket 106.
- a radial gap type outer rotor brushless motor 110 is used as an individual drive motor of a false twisting device. Accordingly, the reliability of the drive motor is high, and it is unnecessary for the drive motors to be subjected to maintenance or repair service while they are being mounted on a false twist texturing machine or a draw texturing machine.
- the construction wherein the spindle mount 120 is dismount laterally relative to the stationary bracket 106 while it has the drive motor mounted thereon can be applied.
- the drive motor requires maintenance or adjustment service, it is first dismount from a false twist texturing machine or a draw texturing machine and then is subjected to the maintenance or repair service. Thereafter, it is mounted in a lateral direction while it has a drive motor mounted thereon.
- the spindle 132a connected to the radial gap type outer rotor brushless motor 110 is supported by the bearing 125 disposed on the spindle mount 120 and the bearing 125A disposed within the outer rotor motor 110, and thus, the rotation of the spindle 132a becomes stable, and its higher rotation is possible. Further, the top portions of the spindles 132a, 132b and 132care supported by the top plate 151,and the advantages are are further achieved since the spindles 132a, 132b and 132c are supported at both the ends.
- each false twisting device is driven by an individual motor, an no tangential belt is used, therefore, generation of noise can be highly decreased. Further, when the operating conditions of the individual motors for respective work stations are changed, adjustment of the false twisting conditions for respective work stations can be achieved easily.
- a motor drive type friction false twisting device provided with three spindles which can be actually used. Further, the present invention provides a friction false twisting device provided with three spindles wherein the rotor and the stator 112 of the false twisting device can be readily positioned whereby the false twisting device can be installed easily upon assembling and installing again after detaching for cleaning or maintenance service. In addition, the present invention provides a friction false twisting device provided with three spindles which does not cause uneveness in rotation at a high speed rotation, and which can generate sufficiently large driving torque, whereby even a tick yarn with a large denier can be twisted thereby.
Abstract
Three spindles 21, 22 and 23 have a plurality of friction
discs 27, respectively, and are rotatably supported on a spindle
mount 20, the spindle mount being detachably disposed on a
bracket 5, one of the three spindles has a rotor of a drive motor
mounted thereon and a stator of the drive motor being fixed to
the bracket, wherein the drive motor is a radial gap type outer
rotor brushless motor 10, the outer rotor 11 of the brushless
motor is formed in a bell shape, and the outer rotor is fixed to
an end of one 21 of the spindles so that it covers the peripheral
outside and the spindle side end of the stator of the brushless
motor forming a small clearance therebetween and that the
peripheral portion of the outer rotor and the peripheral potion
of the stator are magnetically connected with each other.
Description
- The present invention relates to a motor drive type friction false twisting device provided with three spindles. More specifically, the present invention relates to a motor drive type friction false twisting device provided with three spindles which device may be used in a false twist texturing machine or a draw texturing machine, by which device twists are imparted to a synthetic yarn such as polyester, polyamide and so on and which device is driven by an individual motor.
- A motor drive type friction false twisting device provided with three spindles having a plurality of friction discs mounted thereon and being disposed at apexes of an imaginary triangle so as to locate the peripheries of the friction discs along a helix has been widely used in a draw texturing machine or a false twist texturing machine.
- Conventionally, a tangential belt type device is known as such a friction false twisting device provided with three spindles. More specifically, a running belt is extended along a machine frame of a yarn processing machine such as a draw texturing machine or a false twist texturing machine wherein a plurality of such friction false twisting devices are disposed, and drive whorls of the friction false twisting devices provided with three spindles are pressed to and in contact with the belt so that drive force is transmitted to all the spindles from the whorls so as to rotate the three spindles in the same direction at the same rotational speed.
- In a friction false twisting device, the spindles are disposed on a unit base as described above. Further, in such a tangential belt type device wherein a plurality of friction false twisting devices are driven by a single belt, pressing of the whorls of the false twisting devices and running of the drive belt for a long distance are noise generating source. Further, in the tangential belt type, since the drive whorl is driven by means of frictional engagement between the belt and the whorls, it is very difficult to individually control the false twisting devices so as to eliminate twisting uneveness in a plurality of false twisting devices.
- In order to obviate such problems, proposed is an individual motor drive type wherein a drive motor is disposed in each false twisting device and the drive motor is functionally connected with the spindles. As a connecting method, connection between the drive motor and the spindles by means of a coupling or connection by means of a timing belt engaging with the timing pulleys, which are secured to an output shaft of the drive motor and one of the spindles. (See for example Japanese Patent Laid-open No. Hei 4-209837.)
- In such an individual motor drive type, it is necessary to maintain the distance between the pulleys at a predetermined range and set the tension in the belt at a predetermined amount so as to ensure transmission between the driving timing pulley at the motor side and the driven timing pulley at the spindle side without necessity of maintenance service.
- In order to satisfy such requirements, in a friction false twisting device of an individual motor drive type, it is necessary that the false twisting device and the motor unit base as a whole can be detached from the spindle mount or a frame of a textile texturing machine upon every maintenance service or every replacement of friction discs. However, such detachment cannot be done easily with respect to the devices which have been proposed.
- In the meantime, Japanese Patent Publication No. Hei 8-19585 proposes that a base of a false twisting device is detachably disposed on a support block movable toward or a support plate swingable toward a drive motor which is fixed to the spindle mount of a textile texturing machine, that they are moved toward the drive motor together with the base of the false twisting device upon detachment of spindles, whereby a belt wrapping about the drive motor and the spindle is brought into a slackened condition, and that under this condition, the toothed belt having been wrapped about the drive motor and the spindle is detached, and then, the false twisting device is taken out upwardly together with the base.
- However, in such a device, since the belt wrapping about the drive motor and the spindle is slackened upon detachment of the spindle, shop adjustment of the frictional engagement between the spindle and the drive belt has to be taken place at every installation of the false twisting device, and it is a very troublesome work to adjust a plurality of friction false twisting devices mounted on a false twist texturing machine or a draw texturing machine.
- As a countermeasure of the problems, Japanese Patent No. 2657539 proposes a false twist texturing device for producing a textured synthetic yarn comprising a texturing device head including a friction disc assembly and an electric motor block including an electric motor for driving the friction disc assembly, a spindle of the friction disc assembly being supported in a cantilever fashion by the texturing device head via a bearing so as to protrude from the texturing device head, the spindle has a rotor of the electric motor at the portion thereof protruding from the texturing device head, and a stator of the electric motor is fixed within the electric motor block.
- According to this proposed device, the adjusting problem of frictional engagement between the drive motor and the spindle can be obviated since the spindle is directly driven from the electric motor.
- However, in the false twisting device disclosed in the Japanese Patent No. 2657395, a cylindrical stator of the electric motor is fixed within the electric motor block and a column type rotor is inserted into a hollow portion of the stator. Since the stator is disposed within the electric motor device and is not seen from the outside, accurate positioning of the rotor relative to the stator is difficult.
- Further, the false twisting device disclosed in the Japanese Patent No. 2657395 has a construction wherein the rotor is rotated within the inside of the cylindrical stator, and the rotor has a small diameter and accordingly small moment of inertia. Since the moment of inertia is small as described above, there is a problem with respect to stability of the rotating speed and uneveness in twisting.
- In addition, although the false twisting device disclosed in the Japanese Patent No. 2657395 can be realized when the number of spindles is one, it can not be carried out in a friction false twisting device provided with three spindles, each of which is provided with a plurality of friction discs. The technical reasons will now be described below.
- Figs. 1 and 2 of the Japanese Patent No. 2657395 disclose an embodiment of a friction false twisting device provided with three spindles. Although lines 4 to 8, in
Column 5 of the official gazette describes that "Reference numeral 7 denotes a toothed belt wheel, via a toothed belt wrapping about the toothed belt wheel, drive of the spindles 8 and 9 is performed.", no toothed belt is illustrated in the drawings. Contrary to this, in the device illustrated in Figs. 1 and 2, a member for supporting three spindles has a projection at the lower end thereof, and the projection is engaging with a shoulder of a recess formed in the block so as to position the stator 4 and the rotor 3 of the electric motor at a predetermined position. - As it has been well known, in a false twisting device provided with three spindles, three spindles are located at apexes of an imaginary triangle, the distance between the adjacent apexes being larger than a diameter of a friction disc. When it is seen in a plan view, the positions where the spindles 8 an 9 are disposed locate at outside of the periphery of the recess of the electric motor block. It is difficult for a person skilled in the art to engage with a toothed belt with ends of the spindles 8 and 9 which are constructed as described above even if he fully utilizes his technical common sense, and as an actual problem, it is difficult to drive the spindles 8 and 9 by a belt which is engaging with the belt wheel 7.
- Referring to United States Patent No. 4,899,533 which is a United States counterpart of said Japanese Patent No. 2657539, it discloses an
arc portion 20 projecting from the lower end of the motor guide in Fig. 2, and lines 45 to 50, in column 3 of its specification read "There is a toothed disc 7 on the shaft 1 above the rotor from which the shafts 8 and 9 are driven by theendless belt 20 that wraps around the disc 7 and around corresponding discs on the shafts 8 and 9. Thebelt 20 may be a gear belt or a toothed belt and a round or a flat belt." - However there is no such an endless belt as disclosed in Fig. 2 of the United States Patent No. 4,899,533 as far as a person skilled in the art knows, and accordingly, it is difficult to wrap around and engage with such an endless belt around the pulleys mounted on the spindles 8 and 9 and the toothed wheel 7.
- Therefore, there is no possibility for the device proposed in Japanese Patent No. 2657539 or United States Patent No. 4,899,533 to be actually carried out in a friction twisting device provided with three spindles, while it may be carried out in a false twisting device of a single spindle type.
- It is an object of the present invention to provide a friction false twisting device provided with three spindles which can be actually carried out and which can overcome the above-described problems of lack of actual applicability inherent in the false twisting device provided with three spindles which is disclosed in the Japanese Patent No. 2657539.
- Further, it is another object of the present invention to provide a friction false twisting device provided with three spindles wherein the rotor and the stator of the false twisting device can be readily positioned whereby the false twisting device can be installed easily upon assembling and installing again after detaching for cleaning or maintenance service.
- In addition, it is a still other object of the present invention to provide a friction false twisting device provided with three spindles which does not cause uneveness in rotation at a high speed rotation, and which can generate sufficiently large driving torque, whereby even a tick yarn with a large denier can be twisted thereby.
- According to the present invention, the objects are achieved by a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket,
characterized in that the drive motor is a radial gap type outer rotor brushless motor. - According to the false twisting device provided with three spindles having a plurality discs, each false twisting device is driven by an individual motor, and no tangential belt is used, generation of noise can be highly decreased. Further, when the operating conditions of the individual motors for respective work stations are changed, adjustment of the false twisting conditions for respective work stations can be achieved easily.
- According to the device of the present invention, a radial gap type outer rotor brushless motor is used as a drive motor. In a brushless motor, a rotor can be constructed with permanent magnets, and accordingly, wound wire can be omitted from the outer rotor and such a disposition as wound wire can be gathered at the stator side. Therefore, the present invention is appropriate for a device wherein the outer rotor can be detachably installed.
- Further, since the present invention uses a radial gap type outer rotor brushless motor, the rotor is located at the outside and has a large diameter, and accordingly, a large moment of inertia. Therefore, it is beneficial for rotation at a constant speed. Further, since magnets, i.e., permanent magnets, are disposed in the rotor having a large diameter, the size of the magnets can be relatively large. Accordingly, the present invention can exert high efficiency and high torque, and it is effective as a device for false twisting a thick yarn. In addition, since the stator is located at the inner position, the resistance of its wire can be small, and the copper loss of the drive motor can be reduced. Therefore, the drive motor and accordingly, the false twisting device, can easily become of high efficiency.
- Further, the present invention achieves the above-described objects by a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket,
characterized in that the drive motor is a radial gap type outer rotor brushless motor, and the outer rotor of the brushless motor is formed in a bell shape, and the outer rotor is fixed to an end of one of the spindles so that it covers the peripheral outside and the spindle side end of the stator of the brushless motor forming a small clearance therebetween and that the peripheral portion of the outer rotor and the peripheral potion of the stator are magnetically connected with each other. - Since the brushless motor used in the invention is a radial gap type outer rotor brushless motor, it is not provided with any shaft within the outer rotor not like a conventionally known outer rotor brushless motor. More specifically, the outer rotor of the brushless motor according to the present invention is formed in a so-called bell shape and has cavity inside thereof, and the cavity portion is covered over the stator forming a small clearance therebetween.
- Since it has such a construction as described above, the outer rotor of the present invention does not require any bearings between it and the stator, and accordingly, it achieves a further advantage that the outer rotor can be secured easily in addition to those described above.
- Further, according to the present invention, the above-described objects are achieved by a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket,
characterized in that the spindle mount and the bracket have engaging portions mounted thereon, respectively, at positions away from positions where the rotor and the stator of the drive motor are disposed, and the drive motor is a radial gap type outer rotor brushless motor. - In the invention disclosed in the above-described Japanese Patent No. 2657539, the rotor guide member supporting the spindles and the electric motor block are engaged with each other by means of convex portion and concave portion formed around the stator and the rotor. Accordingly, when it is tried to be carried out in the false twisting device provided with three spindles, their driving connection cannot be realized. Contrary to this, according to the present invention, taking into consideration the problems inherent in the Japanese Patent No. 2657539 and easiness in assembling operations, the engaging portions are formed in the spindle mount and the bracket, respectively, independently and separately from the rotor and the stator of the drive motor at positions away from positions where the rotor and the stator of the drive motor are disposed.
- When the spindle mount is secured to the bracket using the engaging portions, the rotor, i.e., the outer rotor, of the motor disposed on the spindle mount is positioned at a predetermined position relative to the stator of the motor mounted on the bracket, and their positioning can readily be performed. Further, under the condition thus positioned, the clearance between the outer rotor and the stator of the brushless motor of an outer rotor type can be a predetermined amount, and accordingly, a desired magnetic connection can be formed between them.
- Further, according to the present invention, the three spindles may have pulleys at ends thereof, respectively, and the three spindles are rotated in the same direction at the same speed by means of a drive belt wrapping about the three pulleys. Since the present invention is constructed as described above, even when the three spindles have pulleys at ends thereof, the device according to the present invention can be realized without any difficulty. In short, since the present invention does not use the lower portion of the spindle mount as a portion for engaging with the bracket, this area is open sufficiently, and accordingly, driving pulley can be disposed at this area.
- Furthermore, as illustrated in the embodiments of the present invention, it is preferred that the three spindles are supported at ends thereof opposite to the pulleys by a top plate, whereby the three spindles are supported by the top plate and the spindle mount at both the ends thereof. According to this construction, since the spindles are supported at both the ends thereof, the operating speed of the device can be further enhanced.
- In addition, according to the present invention, the above-described objects are achieved by a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being disposed on a bracket detachably in a lateral direction,
characterized in that the spindle mount has a stator of a radial gap type outer rotor brushless motor mounted at the lower surface thereof, an outer rotor is supported rotatable about the stator, the stator and one of the three spindles are operably connected, the three spindles have pulleys at the lower ends thereof, respectively, and the pulleys are connected by a drive belt. - According to the present invention, the three spindles having a plurality of friction discs are rotatably supported on a spindle mount, and the spindle mount is disposed on a bracket detachably in a lateral direction. Accordingly, upon its dismounting, it does not abut with nor damage other parts which are mounted on a false twist texturing machine or draw texturing machine, and the dismounting operation can be done easily. Thus, there does not occur any trouble which has been caused by upward lifting of the main portion of a false twisting device.
- Further, according to the present invention, a radial gap type outer rotor brushless motor is used as an individual drive motor. Therefore, the reliability of the drive motor is high, and it is unnecessary for the drive motors to be subjected to maintenance or repair service while they are being mounted on a false twist texturing machine or a draw texturing machine. Thus, the construction wherein the spindle mount is dismount laterally relative to the bracket while it has the drive motor mounted thereon can be applied. When the drive motor requires maintenance or adjustment service, it is first dismount from a false twist texturing machine or a draw texturing machine and then is subjected to the maintenance or repair service. Thereafter, it is mounted in a lateral direction while it has a drive motor mounted thereon.
- In addition, according to the present invention, the spindle mount has a stator of a radial gap type outer rotor brushless motor mounted thereon, while an outer rotor is supported rotatable about the stator, the stator and one of the three spindles are operably connected, the three spindles have pulleys at the lower ends thereof, respectively, and the pulleys are connected by a drive belt. Therefore, the construction becomes compact, and the spindle mount can be dismounted or attached in a lateral direction relative to the bracket while it has the drive motor mounted thereon.
- According to the present invention, a radial gap type outer rotor brushless motor is used as a drive motor. In a brushless motor, a rotor can be constructed by permanent magnets, and accordingly, wound wire can be omitted from the outer rotor and such a disposition as wound wire can be gathered at the stator side.
- Further, since the present invention uses a radial gap type outer rotor brushless motor, the rotor is located at the outside and has a large diameter, and accordingly, a large moment of inertia. Therefore, it is beneficial for rotation at a constant speed. Further, since magnets, i.e., permanent magnets, are disposed in the rotor having a large diameter, the size of the magnets can be relatively large. Accordingly, the present invention can exert high efficiency and high torque, and it is effective as a device for false twisting a thick yarn. In addition, mean value of wound wire per a coil of the stator becomes short, and the copper loss can be reduced, and therefore, the drive motor and accordingly, the false twisting device, can easily become of high efficiency.
- Further, in a more concrete shape, the present invention provides a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively,
characterized in that the spindle mount has a stator of a radial gap type outer rotor brushless motor at the lower surface thereof, the stator having a hollow hole extending in an axial direction, one of the three spindles passing through the hollow hole has an outer rotor of the outer rotor brushless motor and a pulley at a lower end thereof, the other two of the three spindles have pulleys correspondingly to the pulley, and a drive belt is engaged around the pulleys. - According to the present invention, the lower end of one spindle having a plurality of discs passes through the stator, the entire construction of the false twisting device can be compact while the diameter of the outer rotor can be enlarged. Further, the driving construction from the drive motor to the spindles can be simple.
- In these cases, bearings may be disposed at the inside of the radial gap type outer rotor brushless motor and the spindle mount, respectively, and one of the three spindles may be rotatably supported by a pair of bearings. When this construction is adopted, since the spindle is supported by a pair of bearings, its rotation becomes stable, and its high speed rotation becomes possible.
- Further, in a more concrete shapes, the present invention provides a motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively,
characterized in that the spindle mount has a stator of a radial gap type outer rotor brushless motor at a position which correspond to none of the three spindles on the lower surface thereof, an outer rotor is supported rotatable about the stator, the three spindles pass through the bracket of the spindle mount and have pulleys at lower ends thereof, and a drive belt is engaged around the pulleys secured to the three spindles and the pulley secured to the outer rotor. - In the invention, the three spindles may be driven as follows. More specifically, the three spindles may have pulleys at the lower ends thereof, respectively, and a drive belt may be engaged with the three spindles. Alternatively, one of the three spindles may have pulleys vertically overlaid at a lower end thereof, and the other spindles may have pulleys corresponding to the vertically overlaid pulleys, respectively, and drive belts may be engaged with the vertically overlaid pulleys and the other pulleys, respectively.
- The present invention will now be explained in detail with reference to drawings illustrating some embodiments of the present invention, wherein:
- Fig. 1 is an elevation of an embodiment of a motor driven type friction false twisting device provided with three spindles according to the present invention;
- Fig. 2 is a side view of Fig. 1, wherein a part is sectioned;
- Fig. 3(a) is a plan view of the device illustrated in Figs. 1 and 2, and Fig. 3(b) is a view seen in a direction A-A;
- Fig. 4 is an elevation of another embodiment of the present invention;
- Fig. 5(a) is a bottom view of Fig. 4, and Fig. 5(b) is a bottom view of another embodiment;
- Fig. 6(a) and (b) are bottom views of still other embodiments of the present invention;
- Fig. 7 is an elevation of a still other embodiment of the present invention; and
- Fig. 8 is a bottom view of Fig. 7.
-
- According to the first embodiment of the present invention as illustrated in Fig. 2, a bracket formed in a substantially U-shape is secured to a
friction beam 6 of a false twist texturing machine or a draw texturing machine by means of bolts (not shown). - The
bracket 5 is formed in a substantially U-shape as illustrated in Fig. 2, and itsupper side 5a is shorter than itslower side 5b. Theupper side 5a is formed in asemi-circular shape 5c as illustrated in Fig. 2 so that anouter rotor 11 of a radial gap type outer rotor type brushless motor is not prevented from its installing and detaching operations. In other words, vertical movement of theouter rotor 11 can be done readily. Thelower side 5b of thebracket 5 is formed in an adequate shape such as a rectangular shape. - The
bracket 5 has astator 12 of the outer rotortype brushless motor 10 mounted on and secured to thelower side 5b thereof. Thestator 12 is formed by laminated iron cores having a wire wound thereon and has a substantially circular cylinder shape. The wound wire of thestator 12 is supplied with drive electric current by means of a wire extending from a power source (not shown) forbrushless motors 10 of the false twist texturing machine or draw texturing machine through thefriction beam 6 to thestator 12 in a known method. - According to the present invention, since the
stator 12 is mounted on and secured to thelower side 5b of thebracket 5, the outer profile of thestator 12 can be observed from the outside unless theouter rotor 11 which will be described later has not been covered thereon, and accordingly, the disposing position of thestator 12 on thelower side 5b of thebracket 5 and its positional relationship relative to theouter rotor 11 can be accurately positioned by visually checking them. Consequently, compared to the false twisting device disclosed in the above-described Japanese Patent No. 2657539 wherein the stator is accommodated within the electric motor block, their positioning can be done more accurately. - As illustrated in Fig. 3(a), the
bracket 5 has engagingprojection 5d which serves to position thespindle mount 20 projecting from theupper side 5a thereof at the center thereof seen in the lateral direction of and adjacent to thefriction beam 6. In the illustrated embodiment, the engagingportion 5d is formed in a projection of trapezoid. Contrary to this, thespindle mount 20 has arecess 20a formed in a trapezoid as another engaging portion which engages with the projectingportion 5d formed on theupper side 5a of thebracket 5 formed therein. When both the engagingportions spindle mount 20 and thebracket 5 in a horizontal plane can be done. - The vertical positioning of the
spindle mount 20 and thebracket 5 can be achieved by the upper surface of theupper side 5b of thebracket 5 and the lower surface of thespindle mount 20. -
Screw holes 5e with each of which aclamping bolt 30 such as a hexagon socket set screw is engaged is formed in thebracket 5, and holes 20b for inserting the clampingbolts 30 are formed in thespindle mount 20. After thespindle mount 20 and thebracket 5 are positioned to each other as described above, the clampingbolts 30 are inserted through theholes 20b formed in thespindle mount 20, and the ends of the clampingbolts 30 are screwed with the tappedholes 5e formed in thebracket 5, and thus, thespindle mount 20 is secured to thebracket 5 at a predetermined position. - In place of the above-described projection of trapezoid, while one engaging portion may be formed as locating pins (not shown) projecting upwardly from the upper surface of the
bracket 5, the other engaging portion may be formed as pin holes with which the locating pins engage and which are formed in thespindle mount 20. In this occasion, when the numbers of the locating pins and the pin holes are set two, respectively, the positioning of thespindle mount 20 and thebracket 5 is assured. Further, when thespindle mount 20 is suitably secured to thebracket 5 by means of the engagement between the locating pins and pin holes, the clamping bolts which has been described above may be omitted. - The
spindle mount 20 has a certain thickness in the vertical direction as illustrated in Figs. 1 and 2, and in this embodiment, as illustrated in Figs. 3(a) and 3(b), it is shaped in a substantially pentagon. As illustrated in Fig. 3(a), thespindle mount 20 has threespindles spindle 21, the threespindles bearings 25 located at upper and lower portions, respectively. - The spindles 21-23 have a plurality of
friction discs 27 mounted thereon, respectively. Thefriction disc 27 is made of a material such as ceramic or polyurethane which has resistance to wear and which can hold yarn to be twisted well as it is common in a known friction false twisting device. As illustrated in Figs. 1 to 3, thespindle 21 has atoothed pulley 31 mounted at the portion thereof projecting from thebearing 25, and thespindles pulleys toothed belt 35 is wrapped around the toothed pulleys 31, 32 and 33 in such a manner that it surrounds their outer peripheries in a triangular shape. - Further, the
spindle 21 has anouter rotor 11 formed in a bell shape mounted at a position thereof below thetoothed pulley 31. More specifically, theouter rotor 11 comprises a circularcylindrical portion 11a and anend plate 11b covering the upper end of the circularcylindrical portion 11a to form a bell shape and does not have any shaft within the inside thereof. Theouter rotor 11 has permanent magnets (not shown) equidistanly disposed in a peripheral direction within the inside of the circularcylindrical portion 11a. - A
hole 11c for inserting and securing the lower end of thespindle 21 is formed at the center of theend plate 11b with positioning accuracy and precise size. When the lower end of thespindle 21 is inserted into thehole 11c formed in theend plate 11b of theouter rotor 11 and is secured by an appropriate means such as glue, theouter rotor 11 is precisely secured to thespindle 21. - As described above, while the
stator 12 is mounted on and secured to thelower side 5b of thebracket 5, theouter rotor 11 is accurately secured to thespindle 21 which is supported on thespindle mount 20, and thus, the positioning accuracy between thespindle mount 20 and thebracket 5 can be achieved by engaging the engagingportions spindle mount 20 andbracket 5. Accordingly, positioning accuracy between theouter rotor 11 and thestator 12 is also achieved. As a result, the inner surface of the circularcylindrical portion 11a of theouter rotor 11 and the inner surface of theupper end plate 11b form small clearances relative to the outer surface and the upper surface of thestator 12 secured to thebracket 5, and rigid magnetic connection is formed between the rotor and the stator of the radial gap type outer rotor brushless motor. - The
spindle mount 20 has two locatingpins 20b (see Fig. 3(b)) projecting therefrom at a side of the spindles 21-23. Acolumn 52 formed in a regular prism hasholes 52a at the bottom thereof. Theholes 52a are inserted onto the locatingpins 20b, and thus, as illustrated in Figs. 1 and 2, thecolumn 52 is standing on thespindle mount 20 at the side of the spindles 21-23. As illustrated in Fig. 3(a), atop plate 51 formed in a substantially triangular shape is screwed at the top of thecolumn 52 by means of abolt 53. Thetop plate 51 has three bearings 54 (see Fig. 3(a)) at the apexes of an imaginary equilateral triangle corresponding to the spindles 21-23 and supports the upper ends of the spindles 21-23 via thebearings 54. As a result, the spindles 21-23 are supported by thebearings 25 mounted on thespindle mount 20 and thebearings 54 mounted on thetop plate 51 at both the ends, respectively. - As illustrated in Fig. 3(a), the
top plate 51 formed in a substantially triangular shape has athreading slit 51b formed at one end thereof, and a yarn guide bracket provided with ayarn guide 61 is disposed swingable about apin 63 above the threading slit 51b of thetop plate 51. Theyarn guide 61 is made of a material having resistance to wear, such as ceramic, and is formed in a C-shape. - As illustrated in Fig. 1, the
spindle mount 20 hasrecess 20c with a narrow width formed therein at the same side as the above-describedthreading slit 51b formed in thetop plate 51 so that the yarn passing by thefriction discs 27 mounted on the three spindles 21-23 is withdrawn to the outside while it avoids thebrushless motor 10 of the radial gap type outer rotor. Therecess 20c is located at the central position of the three spindles 21-23 at the top of thespindle mount 20 as illustrated in Fig. 2, and then, it inclines outwardly. Further, thespindle mount 20 has a detecting device (not shown) for detecting the rotating speed of theouter rotor 11 mounted therein. - The
spindle mount 20 having threespindles friction discs 27 rotatably mounted thereon at the apexes of an imaginary equilateral triangle is put on theupper side 5a of thebracket 5 in such a manner that it covers thebracket 5 from the above, and while therecess 20a of thespindle mount 20 and the engagingportion 5d formed at the upper surface of thebracket 5 are engaged with each other, the locatingbolts 30 are inserted into theholes 20b formed in thespindle mount 20, and the ends of the locatingbolts 30 are screwed to the tappedholes 5e formed in thebracket 5. Thus, thespindle mount 20 can be readily secured to thebracket 5 at a predetermined position. - According to this construction, the inner surface of the circular
cylindrical portion 11a and the upper inside surface of theend plate 11b of theouter rotor 11 attached to the end of thespindle 21 which is supported on thespindle mount 20 form small clearances between them and the outer surface and the upper end surface of the stator which is attached to the bracket, and a rigid magnetic connection between the rotor and the stator in a radial type outer rotor brushless motor is formed between theouter rotor 11 and thestator 12. Under this condition, when the drive electric current is supplied with the coil winding of thestator 12, theouter rotor 11 is rotated in a manner similar to an ordinary brushless motor, and the rotation of theouter rotor 11 is transmitted to the spindles 21-23. - Since the present invention uses a radial gap type outer
rotor brushless motor 10, therotor 11 is located at the outside, has a large diameter and accordingly, a large moment of inertia. Therefore, it is beneficial for rotation at a constant speed. Further, since magnets, i.e., permanent magnets, are disposed in therotor 11 having a large diameter, the size of the magnets can be relatively large. Accordingly, the present invention can exert high efficiency and high torque, and it is effective as a device for false twisting a thick yarn. In addition, since the stator is disposed at the inner side, its wire has low resistance, and the copper loss can be reduced. Therefore, the drive motor and accordingly, the false twisting device, can easily become of high efficiency. - When the
spindle mount 20 of the present invention is required to be detached from thebracket 5, the locatingbolt 20 is taken out, and thespindle mount 20 is upwardly withdrawn in a vertical direction. Thus, thespindle mount 20 having threespindles friction discs 27, respectively, rotatably mounted thereon at apexes of an imaginary equilateral triangle can be easily taken out from thebracket 5. Under this condition, anotherspindle mount 20 which has been prepared separately and which has threespindles friction discs 27, respectively, rotatably mounted thereon at the apexes of the imaginary equilateral triangle may be installed in a manner described above, alternatively, the taken out spindle mount may be installed in a manner described above after it is cleaned up or after it is disassembled and is subjected to a maintenance service. - Other embodiments of the present invention will now be explained with reference to Figs. 4-6. In the embodiment which has been explained with reference to Figs. 1-3, the spindle mount is dismounted from the
bracket 5 by withdrawing it upwardly in a vertical direction. Contrary to this, in the embodiments which will be described below, the spindle mount is dismounted from the bracket by withdrawing it laterally, i.e., in a horizontal direction. - Referring to Figs. 4 and 5(a), a
stationary bracket 106 is fixedly disposed on a machine frame of a false twist texturing machine or a draw texturing machine. Thestationary bracket 106 has a pair ofrods rod 117a has a groove which serves as an engaging portion (not shown) formed at the front end thereof. - Contrary to this, a
spindle mount 120 has a pair of through holes (not shown) formed corresponding to therods rods stationary bracket 106 can be inserted. Further, thespindle mount 120 has a lock member(not shown) which is manually operable about an axis disposed near one of the holes. - When the through holes formed in the
spindle mount 120 are inserted onto therods rod 117a protrudes outward from thespindle mount 120. By manually turning the lock member, the lock member engages with the engaging portion formed at the protruding portion of therod member 117a, and thus, thespindle mount 120 can be integrally secured to thestationary bracket 106. Further, when the lock member is manually turned in a direction opposite to that described above, the engagement between the lock member and the engaging portion of therod member 117a can be disengaged, and thus, thespindle mount 120 can be laterally withdrwan in a horizontal direction, i.e., to the right in Fig. 4, from thestationary bracket 106. - The
spindle mount 120 hasvertical spindles spindle friction discs 131 mounted thereon, and the threespindles friction disc 131 is made of a material such as ceramic, polyurethane which has resistance to wear and which can hold well a yarn to be twisted. - The
spindle mount 120 has a reverse L-shape when it is seen in a front view as illustrated in Fig. 4. Thespindle mount 120 has a circular hole 120a formed at a thin portion thereof, and abearing 125 is disposed within the hole 120a. Onespindle 132a of the above-described three spindles which is adjacent to thestationary bracket 106 is rotatably supported by thebearing 125. Thespindle mount 120 has theother spindle - In this embodiment, the
spindle mount 120 has a column 152 (Fig. 5) projecting upwardly from the surface thereof, which has atop plate 151 attached thereto by aset screw 153 so that the top portions of thespindles - The
spindle mount 120 has astator 112 of a radial gap type outerrotor brushless motor 110 mounted coaxially with thespindle 132a at the thin portion thereof. Thestator 112 of this embodiment is formed in a hollow circular cylinder shape, the body comprises laminated iron cores having coils wound thereon. The wound coils are supplied with power drive source in accordance with a known method from the power source (not shown) for thebrushless motor 110 of the false twist texturing machine or draw texturing machine through thestationary bracket 106 and an electric wire connected to thestator 112. - The hollow circular cylindrical shaped
stator 112 has atop portion 112a and aflange portion 112b, the outer diameter of which is larger than thetop portion 112a, and a shoulder portion is formed between thetop portion 112a and theflange portion 112b. Thetop portion 112a has such a size that it engages with a circular hole 120a formed in thespindle mount 120. Theflange portion 112b of thestator 112 is formed below thetop portion 112a. - The
top portion 112a of thestator 112 is inserted into the circular hole 120a from the side opposite to thespindle 132a, i.e., from the below, so that the shoulder of theflange portion 112b formed below thetop portion 112a of thestator 112 is engaged with the thin portion of thespindle mount 120. Under this condition, theflange portion 112b is secured to thespindle mount 120 bybolts 113. Thus, the hollow circular shapedstator 112 is secured to the lower surface of the thin portion of thespindle mount 120 coaxially with the circular hole 120a. - The lower end of the
spindle 132a passes through the hollow portion of thestator 112 from the circular hole 120a of thespindle mount 120, while the lower ends of thespindles spindle mount 120. - The
spindle 132 has anouter rotor 111 of the radial gap type outer rotor brushless motor at a lower end thereof which passes through the hollow portion of thestator 112. Theouter rotor 111 is formed in a reverse bell shape. More specifically, theouter rotor 111 comprises a circularcylindrical portion 111a and anend plate 111b covering the lower end of the circular cylindrical portion, and thus, it is formed in a reversely positioned bell shape. Theouter rotor 111 has permanent magnets (not shown) equidistantly disposed at the inner side of the circularcylindrical portion 111a. - A
hole 111c into which the lower end of thespindle 132 is inserted and secured to is formed at the center of theend plate 111b at the accurate position with a precise dimension. The lower end of the spindle 121 is inserted into thehole 111c formed at the center of theend plate 111b and is secured by means of an appropriate means such as adhesive, welding ¥, pressure welding or screw cramping, and thus theouter rotor 111 can be accurately positioned to the spindle 121. - The
spindles pulleys 140, respectively, at the lower ends thereof. As illustrated in Fig. 5(a), aspindle drive belt 141 which is constructed by an endless belt wraps around thepulleys 140. In this embodiment, thepulley 140 is a toothed pulley, and thespindle drive belt 141 is a toothed belt. - Because of the construction described above, when the
outer rotor 111 of the radial gap type outerrotor brushless motor 110 is rotated, the rotation of theouter rotor 111 is transmitted to thespindle 132a, and thespindle 132a is rotated. Then, since thespindles pulleys 140 and thespindle drive belt 141, the rotation of theouter rotor 111 is transmitted to thefriction discs 131 mounted on therespective spindles friction discs 131 are rotated in the same direction. - Further, the
spindle mount 120 has anarrow cavity 120c formed at a side thereof same as that of the threading slit (not shown) formed in thetop plate 151 for withdrawing a yarn, which has passed through thefriction discs 131 mounted on the threespindles rotor brushless motor 110. As illustrated in Fig. 5, thecavity 120c reaches at the center of the threespindles spindle mount 120, and from there it is inclined downwardly and outwardly. Further, thespindle mount 120 has a detecting means (not shown) for detecting the rotation of theouter rotor 111. - In the above-described embodiment, the
spindle 132a having theouter rotor 111 of the radial gap type outerrotor brushless motor 110 mounted thereon and theother spindles pulleys 140 at the same level at the lower ends thereof, respectively, and onesingle drive belt 141 is wrapped around the three pulleys. As illustrated in Fig. 5(b), one 132a of the three spindles may have vertically overlaid pulleys 140' at the lower end thereof, while the remaining two spindles may havepulleys 140 corresponding to one of the vertically overlaid pulleys, respectively, and drivebelts 141 and 141' may be wrapped between one of the overlaid pulleys and thepulley 140, respectively. - As described above, the three
spindles friction discs 131 mounted thereon are rotatably supported on thespindle mount 120, and thespindle mount 120 is laterally mounted and dismounted relative to thestationary bracket 106. Thus, upon withdrawal of the spindle mount, its collision with or damage to other parts mounted on the false twist texturing machine or the draw texturing machine does not occur, and the operation can be done easily, and therefore, the problems which may cause by upward withdrawal of the main parts of a false twisting device do not occur. - Further, a radial gap type outer
rotor brushless motor 110 is used as an individual drive motor of a false twisting device. Accordingly, the reliability of the drive motor is high, and it is unnecessary for the drive motors to be subjected to maintenance or repair service while they are being mounted on a false twist texturing machine or a draw texturing machine. Thus, the construction wherein thespindle mount 120 is dismount laterally relative to thestationary bracket 106 while it has the drive motor mounted thereon can be applied. When the drive motor requires maintenance or adjustment service, it is first dismount from a false twist texturing machine or a draw texturing machine and then is subjected to the maintenance or repair service. Thereafter, it is mounted in a lateral direction while it has a drive motor mounted thereon. - Other embodiments will now be explained with reference to Figs. 6 (a) and (b). Fig. 6(a) is a bottom view of another embodiment of the present invention, and Fig. 6(b) is a bottom view of a still other embodiment of the present invention.
- In the above-described embodiment, the
spindle mount 120 has thestator 112 of the radial gap type outerrotor brushless motor 110 mounted at the lower surface thereof, and thestator 112 has the hollow through hole axially extending. One 132a of the three spindles is passed through the hollow through hole of thestator 112 and has theouter rotor 111 of the outerrotor brushless motor 110 and thepulley 140 or 140' mounted at the lower end thereof, while the remaining two 132b and 132c of the three spindles havepulleys 140 corresponding to thepulley 140 or 140' mounted thereon, respectively, and thepulleys 140 and 140' are wrapped by the drive belt or belts. - Contrary to this, in the embodiments which will be described below, the
spindle mount 120 has astator 112 of a radial gap type outerrotor brushless motor 110 mounted at the lower surface thereof at a position which does not correspond to any of threespindles outer rotor 111 is supported rotatably around thestator 12, and the threespindles spindle mount 120. - A
spindle 114 is rotatably supported in the hollow portion of thestator 112. Thespindle 114 has anouter rotor 111 of the radial gap type outerrotor brushless motor 110 at a lower end thereof which passes through the hollow portion of thestator 112. Similar to the above-described embodiment, theouter rotor 111 is formed in a reverse bell shape. More specifically, theouter rotor 111 comprises a circularcylindrical portion 111a and anend plate 111b covering the lower end of the circular cylindrical portion, and thus, it is formed in a reversely positioned bell shape. Theouter rotor 111 has permanent magnets (not shown) equidistantly disposed at the inner side of the circularcylindrical portion 111a. - A
hole 111c into which the lower end of thespindle 114 is inserted and secured to is formed at the center of theend plate 111b at the accurate position with a precise dimension. The lower end of the spindle is inserted into thehole 111c formed at the center of theend plate 111b and is secured by means of an appropriate means such as adhesive, welding, pressure welding or screw cramping, and thus theouter rotor 111 can be accurately positioned to thespindle 114. - The
spindle 114 has apulley 140" mounted at the lower end thereof, one of thespindles spindles pulleys 140 at the lower ends thereof, respectively. Thepulley 140" mounted on thespindle 114 and one of the vertically overlaid pulleys 140' are connected to each other by means of a drive belt 141'. As illustrated in Fig. 6(a), aspindle drive belt 141 which is constructed by an endless belt is wrapped around the other one of the pulleys 140' mounted on thespindle 132a and thepulleys 140 mounted on thespindles pulley 140 is a toothed pulley, and thespindle drive belt 141 is a toothed belt. - Because of the construction described above, when the
outer rotor 111 of the radial gap type outerrotor brushless motor 110 is rotated, the rotation of theouter rotor 111 is transmitted to thespindle 132a, and thespindle 132a is rotated. Then, since thespindles pulleys 140 and thespindle drive belt 141, the rotation of theouter rotor 111 is transmitted to thefriction discs 131 mounted on therespective spindles friction discs 131 are rotated in the same direction. The other construction of this embodiment is similar to those which were explained with reference to the abovedescribed embodiment, their detailed explanation is omitted here. - In the above-described embodiment, the
spindle pulleys 140 and 140' at the same level at the lower ends thereof, respectively, and onesingle drive belt 141 is wrapped around the three pulleys. As illustrated in Fig. 6(b), one of the three spindles, for example 132a, may havepulleys 143, which are vertically overlaid in three stages, at the lower end thereof, while the remaining two spindles may havepulleys 140 corresponding to either one of the vertically overlaidpulleys 143, respectively, and drivebelts pulleys 143 and thepulley 140, respectively. - A still other embodiment of the present invention will now be explained with reference to Figs. 7 and 8. In the embodiment which has been explained with reference to Figs. 4-6, the support of the spindle which is connected to the outer rotor on the spindle mount is done by means of one single bearing. Contrary to this, in the embodiment which will now be explained, the support of a spindle which is connected to an outer rotor on a spindle mount is done by means of two bearings, i.e., a bearing mounted on the spindle mount and a bearing mounted within the outer rotor motor, so as to assure the stability of the rotation of the spindle and to enable its higher rotation.
- Referring to Figs. 7 and 8, a
stationary bracket 106 is fixedly disposed on a machine frame of a false twist texturing machine or a draw texturing machine. Thestationary bracket 106 has a pair ofrods rod 117a has a groove which serves as an engaging portion (not shown) formed at the front end thereof. - Contrary to this, a
spindle mount 120 has a pair of through holes (not shown) formed corresponding to therods rods stationary bracket 106 can be inserted. Further, thespindle mount 120 has a lock member(not shown) which is manually operable about an axis disposed near one of the holes. - When the through holes formed in the
spindle mount 120 are inserted onto therods rod 117a protrudes outward from thespindle mount 120. By manually turning the lock member, the lock member engages with the engaging portion formed at the protruding portion of therod member 117a, and thus, thespindle mount 120 can be integrally secured to thestationary bracket 106. Further, when the lock member is manually turned in a direction opposite to that described above, the engagement between the lock member and the engaging portion of therod member 117a can be disengaged, and thus, thespindle mount 120 can be laterally withdrwan in a horizontal direction, i.e., to the right in Fig. 4, from thestationary bracket 106. - The
spindle mount 120 hasvertical spindles spindle friction discs 131 mounted thereon, and the threespindles friction disc 131 is made of a material such as ceramic, polyurethane which has resistance to wear and which can hold well a yarn to be twisted. - The construction of the
spindle mount 120 will now be explained with reference to Fig. 7. Thespindle mount 120 has ahole 120C for disposing an upper bearing mount and ahole 120B for disposing an outer rotor formed from the upper surface thereof. Thehole 120B for disposing theouter rotor 111 has a circular cross section, the inner diameter of which is larger than that of theouter rotor 111 of the outerrotor brushless motor 110. The lower end of thehole 120B for disposing the outer rotor is connected to a hole with a small diameter for disposing a stator, and a shoulder is formed between thehole 120B for disposing the outer rotor and the hole for disposing a stator. Astator 112 formed in a hollow circular cylinder of a radial gap type outerrotor brushless motor 110 is attached to the shoulder. - The
stator 112 of this embodiment is formed in a hollow circular cylinder shape, the body comprises laminated iron cores having coils wound thereon. The wound coils are supplied with power drive source in accordance with a known method from the power source (not shown) for thebrushless motor 110 of the false twist texturing machine or draw texturing machine through thestationary bracket 106 and an electric wire connected to thestator 112. - The hollow circular cylindrical shaped
stator 112 has atop portion 112a and aflange portion 112b, the outer diameter of which is larger than that of thetop portion 112a, and a shoulder portion, the diameter of which is so selected that it engages with thehole 120A for disposing the stator, at the bottom surface of theflange portion 112b. The shoulder formed between thehole 120B for disposing the outer rotor motor and thehole 120A for disposing the stator is put on theflange portion 112b of thestator 112, and then, thestator 112 is screwed to thespindle mount 120 by means of clamp screws 151 which are inserted from the blow. - A hole for disposing a bearing is so formed at the lower end of the
stator 112 that it is connected to the central hole formed at the center, and thelower bearing 125A is disposed in the bearing disposing hole. The lower end of thespindle 132a adjacent to thestationary bracket 106 among the three spindles is rotatably supported by means of thebearing 125A. - An
outer rotor 111 of a radial gap type outerrotor brushless motor 110 formed in a bell shape is disposed over thestator 112 of thespindle 132a. In short, theouter rotor 111 comprises a circularcylindrical portion 111a and anend plate 111b covering the top of the circular cylindrical portion, and the circular cylindrical portion has permanent magnets (not shown) equidistantly disposed at the inside thereof. - A
hole 111c into which thespindle 132 is secured to is formed at the center of theend plate 111b at the accurate position with a precise dimension. The lower end of thespindle 132a is inserted into thehole 111c formed at the center of theend plate 111b of theouter rotor 111 and is secured to by means of an appropriate means such as adhesive, welding, pressure welding or screw cramping, and thus theouter rotor 111 can be accurately positioned to the spindle 121. - The upper portion of the outer
rotor disposing hole 120B is connected to a circular cross sectionedhole 120C for disposing upper bearing mount, the outer diameter of which is smaller than that of the outerrotor disposing hole 120B and which is slightly larger than that of theouter rotor 111, and the upper bearingmount disposing hole 120C is open at the upper surface of thespindle mount 120. - The
upper bearing mount 150 is disposed within the the upper bearingmount disposing hole 120C. Theupper bearing mount 150 comprises a body which engages with the upper bearingmount disposing hole 120C and aflange portion 150b formed at and projecting from the top of the body. Thus, theupper bearing mount 150 is secured to the top surface of thespindle mount 120 by screwing theflange portion 150b by means of setscrews 153. - The
upper bearing mount 150 has a circular cross sectioned upperbearing disposing hole 150a formed at the axis thereof, and it supports theupper bearing 125. Theupper bearing 125 rotatably supports thespindle 132a at the upper portion of the bearing 130A. - The procedure for assembling this embodiment will now be explained. The
upper bearing 125 is inserted into the upperbearing disposing hole 150a of theupper bearing mount 150, and thespindle 132a is inserted into theupper bearing 125. Then, therotor 111 is attached to thespindle 132a at the front end relative to theupper bearing 125. Further, thestator 112 is supported at the end of thespindle 132a and at the inside of theouter rotor 111 via thelower bearing 125A. - Under the condition wherein the
rotor 111 is attached to thespindle 132a while thespindle 132a supports thestator 112 via thelower bearing 125A, and wherein further it supports theupper bearing mount 150 via theupper bearing 125, thestator 112 is disposed into the outerrotor disposing hole 120B from the above of thespindle mount 120 so that the shoulder formed at the bottom of theflange portion 112b of thestator 112 is engaged with thestator disposing hole 120A. In addition, theupper bearing mount 150 is engaged with the upper bearingmount disposing hole 120C. - Then, the
flange 112b is screwed to thespindle mount 120 by means of setscrews 151 which are inserted from the below of thespindle mount 120 so that thestator 112 is secured to thespindle mount 120. Further, theflange portion 150b of theupper bearing mount 150 is screwed to thespindle mount 120 byset screws 153 so that theupper bearing mount 150 is secured to the upper surface of thespindle mount 120 together with thespindle 132a. As a result, thespindle 132a penetrates through thespindle mount 120 while it is rotatably supported by theupper bearing 125 and thelower bearing 125A. - In addition, the
spindle mount 120 hasspindles spindle 132a, and the lower ends of thespindles spindle mount 120. - The
spindles pulleys 140, respectively, at the lower ends thereof. As illustrated in Fig. 5(b), aspindle drive belt 141 which is constructed by an endless belt wraps around thepulleys 140. In this embodiment, thepulley 140 is a toothed pulley, and thespindle drive belt 141 is a toothed belt. - In this embodiment, a
top plate 151 is secured to by aset screw 153 at a upper end of a column 152 (Fig. 5) standing upward from the upper surface of thespindle mount 120, and it supports the top portions of thespindles spindles - Because of the construction described above, when the
outer rotor 111 of the radial gap type outerrotor brushless motor 110 is rotated, the rotation of theouter rotor 111 is transmitted to thespindle 132a, and thespindle 132a is rotated. Then, since thespindles pulleys 140 and thespindle drive belt 141, the rotation of theouter rotor 111 is transmitted to thefriction discs 131 mounted on therespective spindles friction discs 131 are rotated in the same direction. - Further, the
spindle mount 120 has anarrow cavity 120c formed at a side thereof same as that of the threading slit (not shown) formed in thetop plate 151 for withdrawing a yarn, which has passed through thefriction discs 131 mounted on the threespindles rotor brushless motor 110. As illustrated in Fig. 7, thecavity 120c reaches at the center of the threespindles spindle mount 120, and from there it is inclined downwardly and outwardly. Further, thespindle mount 120 has a detecting means (not shown) for detecting the rotation of theouter rotor 111. - In the embodiment which has been explained with reference to Fig. 4, a bearing may be disposed at the inside of the stator so that bearings are disposed within the brushless motor of a radial gap type outer rotor and the spindle mount like the present embodiment.
- In the above-described embodiment, the
spindle 132a having theouter rotor 111 of the radial gap type outerrotor brushless motor 110 mounted thereon and theother spindles pulleys 140 at the same level at the lower ends thereof, respectively, and onesingle drive belt 141 is wrapped around the three pulleys. As illustrated in Fig. 5(b), one 132a of the three spindles may have vertically overlaid pulleys 140' at the lower end thereof, while the remaining two spindles may havepulleys 140 corresponding to one of the vertically overlaid pulleys, respectively, and drivebelts 141 and 141' may be wrapped between one of the overlaid pulleys and thepulley 140, respectively. - As described above, the three
spindles friction discs 131 mounted thereon are rotatably supported on thespindle mount 120, and thespindle mount 120 is laterally mounted and dismounted relative to to thestationary bracket 106. Thus, upon withdrawal of the spindle mount, its collision with or damage to other parts mounted on the false twist texturing machine or the draw texturing machine does not occur, and the operation can be done easily, and therefore, the problems which may cause by upward withdrawal of the main parts of a false twisting device do not occur. - Further, a radial gap type outer
rotor brushless motor 110 is used as an individual drive motor of a false twisting device. Accordingly, the reliability of the drive motor is high, and it is unnecessary for the drive motors to be subjected to maintenance or repair service while they are being mounted on a false twist texturing machine or a draw texturing machine. Thus, the construction wherein thespindle mount 120 is dismount laterally relative to thestationary bracket 106 while it has the drive motor mounted thereon can be applied. When the drive motor requires maintenance or adjustment service, it is first dismount from a false twist texturing machine or a draw texturing machine and then is subjected to the maintenance or repair service. Thereafter, it is mounted in a lateral direction while it has a drive motor mounted thereon. - In this embodiment, the
spindle 132a connected to the radial gap type outerrotor brushless motor 110 is supported by the bearing 125 disposed on thespindle mount 120 and thebearing 125A disposed within theouter rotor motor 110, and thus, the rotation of thespindle 132a becomes stable, and its higher rotation is possible. Further, the top portions of thespindles top plate 151,and the advantages are are further achieved since thespindles - According to the false twisting device provided with three spindles having a plurality discs according to the present invention, each false twisting device is driven by an individual motor, an no tangential belt is used, therefore, generation of noise can be highly decreased. Further, when the operating conditions of the individual motors for respective work stations are changed, adjustment of the false twisting conditions for respective work stations can be achieved easily.
- According to the present invention, a motor drive type friction false twisting device provided with three spindles which can be actually used is provided. Further, the present invention provides a friction false twisting device provided with three spindles wherein the rotor and the
stator 112 of the false twisting device can be readily positioned whereby the false twisting device can be installed easily upon assembling and installing again after detaching for cleaning or maintenance service. In addition, the present invention provides a friction false twisting device provided with three spindles which does not cause uneveness in rotation at a high speed rotation, and which can generate sufficiently large driving torque, whereby even a tick yarn with a large denier can be twisted thereby.
Claims (12)
- Motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket,
characterized in that the drive motor is a radial gap type outer rotor brushless motor. - Motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket,
characterized in that the drive motor is a radial gap type outer rotor brushless motor, and the outer rotor of the brushless motor is formed in a bell shape, and the outer rotor is fixed to an end of one of the spindles so that it covers the peripheral outside and the spindle side end of the stator of the brushless motor forming a small clearance therebetween and that the peripheral portion of the outer rotor and the peripheral potion of the stator are magnetically connected with each other. - Motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket,
characterized in that the spindle mount and the bracket have engaging portions mounted thereon, respectively, at positions away from positions where the rotor and the stator of the drive motor are disposed, and the drive motor is a radial gap type outer rotor brushless motor. - Motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being detachably disposed on a bracket, one of the three spindles having a rotor of a drive motor mounted thereon and a stator of the drive motor being fixed to the bracket,
characterized in that the spindle mount and the bracket have engaging portions mounted thereon, respectively, at positions away from positions where the rotor and the stator of the drive motor are disposed, the drive motor is a radial gap type outer rotor brushless motor, and the outer rotor of the brushless motor is formed in a bell shape and is fixed to an end of one of the spindles so that it covers the peripheral outside and the spindle side end of the stator of the brushless motor forming a small clearance therebetween and that the peripheral portion of the outer rotor and the peripheral potion of the stator are magnetically connected with each other. - Motor drive type friction false twisting device provided with three spindles according to any one of claims 1 to 4, characterized in that the three spindles have pulleys at ends thereof, respectively, and the three spindles are rotated in the same direction at the same speed by means of a drive belt wrapping about the three pulleys.
- Motor drive type friction false twisting device provided with three spindles according to claim 5,
characterized in that the three spindles are supported at ends thereof opposite to the pulleys by a top plate, whereby the three spindles are supported by the top plate and the spindle mount at both the ends thereof. - Motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being disposed on a bracket detachably in a lateral direction,
characterized in that the spindle mount has a stator of a radial gap type outer rotor brushless motor mounted thereon at the lower surface thereof, an outer rotor is supported rotatable about the stator, the stator and one of the three spindles are operably connected, the three spindles have pulleys at the lower ends thereof, respectively, and the pulleys are connected by a drive belt. - Motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being disposed on a bracket detachably in a lateral direction,
characterized in that the spindle mount has a stator of a radial gap type outer rotor brushless motor at the lower surface thereof, the stator having a hollow hole extending in an axial direction, one of the three spindles passing through the hollow hole has an outer rotor of the outer rotor brushless motor and a pulley at a lower end thereof, the other two of the three spindles have pulleys correspondingly to the pulley, and a drive belt is engaged around the pulleys. - Motor drive type friction false twisting device provided with three spindles having a plurality of friction discs, respectively, and rotatably supported on a spindle mount, the spindle mount being disposed on a bracket detachably in a lateral direction,
characterized in that the spindle mount has a stator of a radial gap type outer rotor brushless motor at a position which correspond to none of the three spindles on the lower surface thereof, an outer rotor is supported rotatable about the stator, the three spindles pass through the bracket of the spindle mount and have pulleys at lower ends thereof, and a drive belt is engaged around the pulleys secured to the three spindles and the pulley secured to the outer rotor. - Motor drive type friction false twisting device provided with three spindles according to claim 7, 8 or 9, wherein the three spindles have pulleys at the lower ends thereof, respectively, and a drive belt is engaged with the three spindles.
- Motor drive type friction false twisting device provided with three spindles according to claim 7, 8 or 9, wherein one of the three spindles has pulleys vertically overlaid at a lower end thereof, and the other spindles have pulleys corresponding to the vertically overlaid pulleys, respectively, and drive belts are engaged with the vertically overlaid pulleys and the other pulleys, respectively.
- Motor drive type friction false twisting device provided with three spindles according to claim 7, 8, wherein bearings are disposed at the inside of the radial gap type outer rotor brushless motor and the spindle mount, respectively, and one of the three spindles is rotatably supported by a pair of bearings.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10346319A JP2000170045A (en) | 1998-12-07 | 1998-12-07 | Motor-driven triaxial friction false twister |
JP34631998 | 1998-12-07 | ||
JP11037795A JP2000234227A (en) | 1999-02-16 | 1999-02-16 | Motor drive-type triaxial friction false twister |
JP3779599 | 1999-02-16 | ||
PCT/JP1999/006614 WO2000034558A1 (en) | 1998-12-07 | 1999-11-26 | Motor-driven three-axis friction false twisting device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1149941A1 true EP1149941A1 (en) | 2001-10-31 |
Family
ID=26376941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99973312A Withdrawn EP1149941A1 (en) | 1998-12-07 | 1999-11-26 | Motor-driven three-axis friction false twisting device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1149941A1 (en) |
CN (1) | CN1089384C (en) |
AU (1) | AU1410700A (en) |
TW (1) | TW463001B (en) |
WO (1) | WO2000034558A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1526196A2 (en) * | 2003-10-20 | 2005-04-27 | Maschinenfabrik Rieter Ag | A thread heating device |
CN104019334A (en) * | 2014-06-19 | 2014-09-03 | 上海新跃仪表厂 | Double-line coaxial four-channel oil supply device |
CN111809282A (en) * | 2020-07-01 | 2020-10-23 | 杭州勤想实业有限公司 | False twisting machine for anti-static fancy yarn |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009144151A1 (en) * | 2008-05-31 | 2009-12-03 | Oerlikon Textile Gmbh & Co. Kg | False-twist assembly |
DE102009015026A1 (en) * | 2009-03-26 | 2010-09-30 | Oerlikon Textile Components Gmbh | False twisting assembly has three friction spindles arranged in triangle, which has multiple friction disks at free friction ends. where freely rotatable counter roller is assigned to whorl on opposite side of driving belt |
DE102009040864A1 (en) * | 2009-09-09 | 2011-03-10 | Schaeffler Technologies Gmbh & Co. Kg | Friction motor spindle |
CN103088484A (en) * | 2011-10-31 | 2013-05-08 | 上海市毛麻纺织科学技术研究所 | Combined friction false twister device of ring spinning frame |
CN104233545B (en) * | 2014-09-04 | 2016-08-31 | 欧瑞康纺织有限及两合公司 | Friction-disc false-twisting device |
JP6615496B2 (en) * | 2015-06-01 | 2019-12-04 | Tmtマシナリー株式会社 | False twisting machine |
GB2594226B (en) * | 2019-07-05 | 2023-03-15 | Heathcoat Fabrics Ltd | Yarn texturing apparatus |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3743708C2 (en) * | 1987-12-23 | 1995-08-31 | Temco Textilmaschkomponent | False twist texturing unit with electric motor drive |
JPH04295242A (en) * | 1991-03-25 | 1992-10-20 | Tokyo Electric Co Ltd | Rotor magnetic for brushless motor |
-
1999
- 1999-11-26 WO PCT/JP1999/006614 patent/WO2000034558A1/en not_active Application Discontinuation
- 1999-11-26 AU AU14107/00A patent/AU1410700A/en not_active Abandoned
- 1999-11-26 CN CN99814201A patent/CN1089384C/en not_active Expired - Fee Related
- 1999-11-26 EP EP99973312A patent/EP1149941A1/en not_active Withdrawn
- 1999-12-06 TW TW88121307A patent/TW463001B/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0034558A1 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1526196A2 (en) * | 2003-10-20 | 2005-04-27 | Maschinenfabrik Rieter Ag | A thread heating device |
EP1526196A3 (en) * | 2003-10-20 | 2006-07-19 | Maschinenfabrik Rieter Ag | A thread heating device |
CN104019334A (en) * | 2014-06-19 | 2014-09-03 | 上海新跃仪表厂 | Double-line coaxial four-channel oil supply device |
CN111809282A (en) * | 2020-07-01 | 2020-10-23 | 杭州勤想实业有限公司 | False twisting machine for anti-static fancy yarn |
Also Published As
Publication number | Publication date |
---|---|
CN1329684A (en) | 2002-01-02 |
TW463001B (en) | 2001-11-11 |
CN1089384C (en) | 2002-08-21 |
WO2000034558A1 (en) | 2000-06-15 |
AU1410700A (en) | 2000-06-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1149941A1 (en) | Motor-driven three-axis friction false twisting device | |
US5966918A (en) | Yarn false twisting device | |
JP2657539B2 (en) | False twist texturing machine driven by electric motor | |
US20030089812A1 (en) | Wire winding apparatus and method for manufacturing armature | |
EP0837164B1 (en) | Yarn false twisting device | |
JP3322226B2 (en) | Twisting unit | |
JPH1143834A (en) | Motor driven type three dimensional multiple disk friction false twister | |
US5100071A (en) | Motor armature coil winding machine | |
KR200234146Y1 (en) | Stranding machine | |
KR100476276B1 (en) | Yarn twisting unit | |
US4528880A (en) | Staple fiber cutting machine | |
JPH0819585B2 (en) | Friction false twisting device driven by electric motor | |
JP2002038337A (en) | Spindle of spinning machine | |
JP2000170045A (en) | Motor-driven triaxial friction false twister | |
JPS63160977A (en) | Contact roller for filament winder | |
JP2001303373A (en) | Motor-driven triaxial friction false twister | |
US20220316100A1 (en) | Yarn texturing apparatus | |
KR200163079Y1 (en) | Two for one twister | |
JPH0637728B2 (en) | Roller device for textile machinery | |
CN219689985U (en) | Movable tension roller device for warping machine | |
JP3295874B2 (en) | Single-spindle drive type multiple twisting machine | |
JP2000234227A (en) | Motor drive-type triaxial friction false twister | |
KR950000381B1 (en) | Double twisting spindle with winder | |
JP3223811B2 (en) | Yarn false twisting device | |
JP2003309955A (en) | Winding apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20010525 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20030603 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE IT |