WO2007057148A2

WO2007057148A2 - Ring spinning frame comprising drawing systems

Info

Publication number: WO2007057148A2
Application number: PCT/EP2006/010889
Authority: WO
Inventors: Peter Mann; Hermann Güttler
Original assignee: Oerlikon Textile Gmbh & Co. Kg
Priority date: 2005-11-15
Filing date: 2006-11-14
Publication date: 2007-05-24
Also published as: WO2007057148A3; EP1948855B1; JP2009516085A; EP1948855A2; JP5189492B2

Abstract

The invention relates to a ring spinning frame comprising drawing systems that are provided with several drawing rollers which can be driven at speeds causing predetermined drawings by means of main drawing system drive units. Auxiliary drawing roller drive units are assigned to the drawing rollers at a distance from the main drawing system drive unit. The inventive ring spinning frame is characterized in that drawing rollers (2, 3, 4) are equipped with several auxiliary drawing roller drive units (12) which are distributed along the length of the drawing system (1) and impinge the drawing roller with torque that at least reduces torsion thereof such that torques preventing or at least reducing torsion of drawing rollers can be introduced also between the ends of very long drawing rollers without increasing the division of the ring spinning frame at said points or interrupting the sequence thereof and without having to use synchronous motors.

Description

Ring spinning machine with drafting units

TECHNICAL FIELD The invention relates to a ring spinning machine with drafting systems which have a plurality of draw rolls.

For example, with drafting systems of great length, with five hundred jobs or more, the problem arises that their drafting rollers twist differently under the torque applied to them and the different rotational resistance. From which length this problem occurs depends on various factors such as roller diameter, bearing friction, inhibition by pulled straps, etc. When running the drafting system, this different torsion does not adversely affect. However, this leads to acceleration or deceleration of the drafting system, such as during start-up and out-run, during which these different torsions can build up or break down

Delay faults. Depending on whether the torsion of a draw roll to that of a pre- or a downstream draw roll leading or trailing, this leads to thinning or thick spots in the yarn, which can lead to quality losses or even yarn breaks.

State of the art

It is therefore known to prevent different torsions in the drafting rollers of a drafting system of great length or at least to reduce a harmless amount that at the end remote from the drafting gear end of the drafting rollers of the gear transmission of the drafting gear equal (auxiliary) gearbox is arranged by that the respective mutual angular positions of the drafting rollers are maintained even during start-up, at the outlet or at standstill of the drafting system. The torsions are therefore not canceled, but held in default (DE 26 41

434).

Of course, it must be ensured that a change in the default conditions in the

Draft gearbox main gear is made approximately in a change of the yarn number according to the auxiliary gear. This not only represents additional work, but also a dangerous source of error, which can lead to damage to the drafting system, if this Change is not carried out in the same direction and if not fuses are installed against this.

It has therefore also been proposed not to use an auxiliary gear with gear transmission, but by auxiliary motors at the end of the drafting gear remote from the drafting rollers, are introduced by the torques in the draw rolls, the torsions of the draw rolls if not to prevent, then at least below critical values to keep. Thus, from DE 26 41 434 Al a drafting system of great length for ring spinning machines is known, in which the drafting mechanism, are driven by the drafting all drafting rollers, is arranged approximately in the longitudinal center of the drafting system. Each of the long drafting rollers is driven to reduce the torsion occurring at at least one of its free ends by a torque introducing auxiliary motor.

The arrangement of the drafting in the longitudinal region of the draw rolls, however, has the disadvantage that the sequence of division of the jobs is interrupted at this point. This not only complicates the structure of the ring spinning machine. It also requires in particular when devices are provided for automatically changing the roving and / or the cops, special measures, since automatic feeders for such

Changing devices must have an area with vacancies at these locations.

Even when using terminal coupling gear can be used for very long drafting with the

Example 750 and more jobs in the central area of the workstations torsional sagging of the draw rolls occur, which can cause at least distortion errors in the yarn produced.

From DE 100 40 420 Al a drafting arrangement has become known in which at least one of the drafting sub-rollers are driven at more than two drive points along its length. In this arrangement, expressly dispenses with a drafting main drive at the end of the drafting rollers, the drive of which takes place exclusively by the multiple individual drives. As drives are Stirnrad- or

Helical gear or linear motors (Figures 1 to 3) provided. It is obvious that the wheels (27, 29, 31) shown in the drafting system in a small mutual, determined by the processed fiber length distance space found. This is very expensive. The invention was therefore based on the object to provide a device by means of which in a simple manner between the ends of very long drafting rollers whose torsion preventing or at least reducing torques can be initiated.

General description of the invention

Solutions according to the invention are specified in claims 1, 14 and 20.

The fact that long drafting systems arranged both one at its one end

Drawframe main drive device by which the drafting rollers the distortion-oriented speeds is pressed, and optionally associated with a plurality of distributed over the length of the drafting rollers stretch roller auxiliary drive devices, the inclination of the drafting rollers is counteracted to the twist over its entire length. In this case, the drives of the draw roller auxiliary drive devices need not exert the drives of the drafting device main drive devices corresponding speeds on the draw rolls, which greatly simplifies their embodiment and their application of electrical energy.

A preferred embodiment provides that the drafting of a short basic ring spinning machine, in which no torsion still occurs in the drafting system, is provided with a drafting device main drive device, which covers the torque requirement of this drafting system. At each ring spinning machine, which has a greater length than the base ring spinning machine, the additional torque requirement for speed-accurate drive of the drafting rollers is covered by a corresponding number of draw roller auxiliary drive devices.

The narrow design of the draw roller auxiliary drive devices or their transfer organs on the draw rolls allows them to be attacked between the jobs on the draw rolls, without the pitch of the jobs of the ring spinning machine would have to be increased or jobs would have to be eliminated. This also opens up the possibility of setting the draw roller auxiliary drive devices anywhere along the draw rolls and in any number and to introduce additional torque into the draw rolls and to reduce their torsion. The drive motors of the drafting roller auxiliary drive devices can be designed as rotary field magnets, as speed-controlled or speed-controlled asynchronous motors or as synchronous motors or reluctance motors. In particular, rotary field magnets and variable-speed asynchronous motors offer the advantage that in many cases they do not require a function-dependent change in the application of feed energy.

Since the draw roller auxiliary drive devices can be easily inserted at any points in a drafting, they can be provided in any and each draw roll in different numbers. They can be equipped with low power, which accommodates their narrow design.

For the sake of uniformity, the gearboxes of the drafting roller auxiliary drive devices can be designed to be identical for all drafting rollers. However, since the speeds of the input roller and the output roller are usually very different, it may be advantageous, vorzuhalten at least for these two drafting rollers stretch roller Hilfsantriebs- devices with gearbox with different reduction ratios.

In particular, the center roll, which has to move the straps, which has to overcome high resistances when sliding over the deflection edges of the Riemchenkäfige, equipped with stretch roller auxiliary drive devices. However, it is advisable to provide on all drafting rollers of a drafting system with draw roller auxiliary drive devices. The rotational speeds of the drafting rollers driven by these drafting roller auxiliary drive devices are then still determined by the drafting system main drive device.

With the derivation of the feed frequency of the drafting drive motor, the intention is to run the draw roller auxiliary drive devices on the arrival and departure of the drafting system drive speed up and down run. This avoids distortion errors during start-up and at the outlet of the drafting system.

In drafting systems, the drafting rollers are not driven by a gear train, but by separate, exactly speed-controlled (synchronous) motors, have a power supply device that feed these motors with the appropriate frequencies. In this case, the drive motors of the draw roller auxiliary drive devices are subjected to frequencies corresponding to or derived from the frequencies of the associated draw roller motors. Since in this case the exact, causing the delays speeds of the drafting rollers are determined by the synchronous drive motors of the drafting rollers, is sufficient in most cases the use of Asynchronous motors on the draw roller auxiliary drive devices to reduce their torsion by introducing torque sufficiently.

It is understood that the draw roller auxiliary drive devices may also be equipped with synchronous or reluctance motors.

For the drive of drafting systems electric motors from standard series are usually used, which have certain power levels. Since a suitable electric motor is rarely offered, usually the next stronger is used, but is more expensive and unfavorably runs only under partial load. Also in the present invention, it is obvious to provide uniform performances of the electric motors. Here, however, there are no problems in adapting the number of uniform drafting roller auxiliary drive devices used very closely to the required total power input, so that their motors are close to their own

Rated power are loaded.

For practical reasons, it is advisable to equip all drafting rollers of a drafting system adjacent with drafting roller auxiliary drive devices. This simplifies their wiring. However, there is nothing wrong with providing a drafting roller which has higher torsion than others at a smaller distance and accordingly with a larger number of drafting roller auxiliary drive devices. In this way, different torsions of drafting rollers can be compensated for with the least possible number of draw roller auxiliary drive devices with optimally loaded drive motors.

Frequently, the draft roller and the center roller are driven by separate synchronous motors on drafting systems, while the input roller is driven by gear translation of the center roller, since the bias between input roller and center roller is rarely changed. In this case, the drive motors of the draw roller auxiliary drive devices of the output and the center roller could be acted upon by frequencies derived from the (master) frequencies of the master motor of the center roller.

Due to the proposed in claim 14 narrow training at least of the drive energy transferring to the drafting rollers transfer elements of the drafting roller auxiliary drive devices, it is possible to attack this between two jobs on drafting rollers without having to increase the spindle pitch of the ring spinning machine or jobs have to be omitted. This opens up the possibility of introducing additional torque into the draw rolls at any point along the draw rolls and preventing or at least reducing their torsion. In this case, according to the invention, the tendency of a draw roll to torsion should be turned off, ie, to compensate for it at least approximately. This can be achieved by the number of draw roller auxiliary drive devices associated with a draw roller, by the application of electrical energy to the draw roller auxiliary drive devices, in particular their feed frequency or

Supply voltage or carried by the transmitted torque.

The choice of supply frequency or supply voltage can also to the operating condition of a

Tension roller can be adjusted: it can be temporarily increased when starting a machine or higher at higher speeds.

Since the draw roller auxiliary drive devices can be easily inserted at any points and / or in any number in a drafting system, they can be equipped with low power, which accommodates their narrow design. They can also be carried out uniformly - with higher torque requirement, they can in larger

Number can be used.

If under a support and loading arm of a drafting system no sufficient space for coupling a transfer member of a drafting roller auxiliary drive device should be present, it is proposed to arrange these between two adjacent support and loading arms associated upper roller pairs. A draw roller auxiliary drive device is thus preferably arranged between the second and third riffelfeld lying to the right or left of a punch.

If between two adjacent jobs of a drafting system no sufficient space for the coupling of a transfer member of a draw roller Hilfsantriebsvoπϊchtung should be present, it is proposed to reduce the distance between two serviced by the same Oberwalzenzwilling jobs, thereby increasing the distance between the served by other Oberwalzenzwillinge jobs while maintaining the spindle pitch increased. This creates space for the coupling of the

Transmission organs in this enlarged space. The free allocation to drafting rollers also makes it possible, if several drafting rollers are to be provided with such drafting roller auxiliary drive devices, to insert them between staggered workstations of the drafting rollers.

The drafting roller auxiliary drive devices must be mounted so as to receive the reaction momentum of the transmitted energy. Advantageously, they are therefore fastened to the punches or the roller bearing carriage assigned to the punches. As a result, it is unnecessary that they must be readjusted when changing the roll distance.

In order to achieve a staggered arrangement, it is proposed that the drafting roller

To arrange auxiliary drive devices on a punch alternately right and left.

The possible plurality of drafting roller auxiliary drive devices along the drafting rollers can also reduce the diameters of the drafting rollers, if desirable, without the risk of increased torsion with the adverse consequences thereof.

If the draw roller auxiliary drive devices have transfer members between a drive member and a draw roller, they may be housed in a closed housing for protection against runoff of the draw roller auxiliary drive devices and contamination of the machined material.

Since the speeds of the input roller and the output roller are usually very different, it may be advantageous to provide common draw rollers auxiliary drive devices with gearbox with different reduction ratios on the two drafting rollers at least for these two drafting rollers.

The stretch roller auxiliary drive devices may be used as drive motors in the form of synchronous motors, which may also be designed as reluctance motors, or of variable speed asynchronous motors.

In the stretch roller motor according to claim 20, maximizing the axial length of both stator and rotor means that both components fully occupy the clearance between two adjacent corrugated fields by omitting bearings on either side of the stator and rotor, or by doing so train as narrow as possible. This is possible because the rotor is mounted on the draw roller and between stand and rotor no unilaterally radially directed forces occur.

Minimizing the outside diameter of the stand implies that it takes full advantage of the smallest pitch available for adjacent draw rolls. This is possible because the diameter of the draw roll roller carrying the draw roll motor is reduced in the region in which the runner is mounted on it. As a result, not only the electromotive components can be moved further inward, but also those of the stator. Since the inclination of the drafting roller for torsion by the stretched roller motors used is avoided or reduced.

In this maximization or minimization, care must be taken that the delivered torque of the drafting roller motor remains as large as possible.

By dispensing with own bearing of the rotor whose axial length can be increased because such, to be arranged in special end shields bearing axial length would claim. The waiver is made possible by the fact that the runner is mounted on the draw roll to which he is assigned and makes their already existing storage with use. This bearing is spaced from the rotor and connected to it only indirectly via the draw roll.

The drafting rollers in drafting systems have an extremely low impact for textile technology reasons. Out-of-roundness in the course of the drafting rollers would lead to periodic distortion errors and impair the quality of the yarn produced until it is useless. The straightening of the draw rolls to exact concentricity without impact represents a separate operation in their production.

By inserting projecting pins of the rotor into the draw roller sections adjoining the draw roller motor, an extremely precise, impact-free running of the rotor is achieved. Alternatively, one of the draw roll sections may comprise a cylindrical stud on which the runner may be secured. When a thread connects to this pin with which the draw roll section can be screwed into the subsequent draw roll section, the runner is clamped on this pin.

Also, the stator of the drafting roller motor preferably has no bearings. It is attached to a fixed component, which is a carrier of the drafting equipment, a carrier the carrying and loading arms or a strap-turning rail can act. It is preferably a component which contains a bearing of the draw roll to which the draw roll motor is assigned. In particular, the stand can be arranged on a punch of the drafting system or on a roller carriage of one of the output roller upstream drafting rollers.

The interaction of the stator and rotor requires a precise axial position of the two motor parts to each other. To make this possible, the stand is adjustable to the runner and adjustable attached to the component.

For this purpose, a Einstelllehre is proposed in a further embodiment of the invention, by means of which the stator is aligned very precisely to the rotor and fastened in this position on the component provided for this purpose. Preferably, two identical setting gauges are provided, which are insertable from both end sides of the engine forth in the annular gap between the stator and rotor.

In order to prevent the ingress of dust and flight in a drafting system which is heavily loaded by these contaminants into the interior of the engine, the annular gap between

Stand and runner be provided with a seal.

If the motor is arranged at a greater distance from the punch or a roller carriage and, accordingly, its attachment has a large projection, the motor can be provided on one side with a support bearing. It does not have the task to store the engine, but only to prevent accidental unilateral loading of the stand comes into contact with the runner.

In an alternative embodiment, bearings are arranged in the rotary gap between stator and rotor, which can be made weak, since no radial or axial forces occur between the stator and rotor. This offers the advantage that the stand does not have to be fixed and does not need to be adjusted and can not touch the runner. The stand only has to be supported on a non-rotatable component in order to apply the reaction to the torque. This may be, for example, to the support bar of Unterriemchen- tension brackets.

Finally, it is possible to attach laterally to stand and runner thin metal shields that do not significantly increase the axial length of the components and in which directly on the draw roll supporting bearing can be arranged. Specific description of the invention

In the drawing, exemplary embodiments of the invention are shown purely schematically. 1 shows the plan view of the beginning region of a drafting system with drafting system

Main drive device and draw roller auxiliary drive devices; Fig. 2 is a representation as in Fig. 1 with speed control of the drives of

Drawing rollers auxiliary drive devices;

Fig. 3 is a representation as in Fig. 1 with the main drive of the drafting rollers by means of synchronous motors.

In the figures 1 to 3 of the drawings of a drafting 1, the initial areas of three drafting rollers 2, 3 and 4 are shown, they extend even further to the right. They are stored in punches 5 at regular intervals. In the embodiments of Figures 1 and 2, they are at their left end by a drafting

Main drive device 6 in the form of a driven by an electric motor 7 change gear transmission 8 form-fitting drive-connected with each other. The change gear transmission gives the drafting rollers angular accuracy to the turns between the

Rollers to reach the intended draft stages.

The drive motor 7 is acted upon from the network 9 with energy. The grid also powers a power supply 10 that powers drive motors 11 of draw roller auxiliary drive devices 12. The draw roller auxiliary drive devices engage with transfer members 13 on the lower rollers 2, 3, 4 and transmit torque thereto. The power supply device 10 is connected via separate lines 14, 15, 16 with the drive motors 11, so that they can act on these with different supply voltage and / or supply frequency.

Since the rotational speeds of the drafting rollers 2, 3, 4 and their relationships with one another are exactly determined by the gearbox 8, it is sufficient if the drafting roller auxiliary drive devices 12 exert only torque on the drafting rollers. In the simplest embodiment, therefore, they can be rotary field magnets which assist the rotational movement imparted to the drafting rollers by the gearbox 8 and thereby reduce the torsion of the rollers. Greater or lesser torque can be achieved by different supply voltage and / or supply frequency. In the embodiment of Figure 2 are on the drafting rollers 2, 3, 4 preferably in the vicinity of the gear train 8, where there is no torsion, speed sensor 17, 18, 19 are arranged, whose outputs are connected to the power supply device 10. In this case, this can act on the drive motors 11 of the drafting roller auxiliary drive devices 12 speed-controlled, so that they drive the drafting rollers at the intended speed.

It is also illustrated in this exemplary embodiment that the assembly of the various draw rolls 2, 3, 4 with draw roller auxiliary drive devices 12 can be different. It is believed that the torsion of the middle lower roll 3 is higher than that of the others, as it must tow the slips sliding over deflections. It is therefore provided, for example on every second punch 5 with a draw roller auxiliary drive devices 12, while the other bottom rollers, for example, only on every third punch such.

In the embodiment of FIG. 3, the draw rolls 2, 3, 4 each have a synchronous motor

20, 21, 22 as drafting device main drive device 6. The power supply device 10 feeds this synchronous motors with those supply frequencies are driven by the drafting rollers exactly with the intended speeds. With these frequencies also designed as synchronous motors drive motors 11 of the drafting roller auxiliary drive devices 12 are acted upon and driven synchronously.

Saurer GmbH & Co. KG Z 0516 WO

Reference numeral list for Fig. 1 to 3 1 drafting system

2, 3, 4 bottom rollers 5 punching 6 drafting system main drive device

7 drive motor

8 gearboxes

9 network

10 power supply device 1 1 drive motors

12 draw roller auxiliary drive devices

13 transmission links 14, 15, 16 lines

In Figures 4 to 7 of the drawing, a further exemplary embodiment of the invention is shown schematically. Show

Fig. 4 is a plan view of a portion of a drafting system;

Fig. 5 is a front view of the drafting system of Fig. 4; Fig. 6 is a front view of a variant of a drafting system;

Fig. 7 is a front view of another variant of a drafting system.

In Figure 4 sections of three lower rollers 1, 2 and 3 of a drafting 4 are shown, which are mounted in a punch 5. To the right of the punch is a support and loading arm 6 recognizable, are stored in the three Oberwalzenzwillinge 7, 8 and 9, which press on the lower rollers. To the left of the punch is another support and loading arm 6 recognizable, the Oberwalzenzwillinge however are broken away. In the main drafting zone between the lower rollers 2 and 3, a Riemchen- turning rail 10 is located.

As can be seen from FIG. 5, the drive motor 12 of a draw roller auxiliary drive device 13 is fastened to the punch 5 below that of the delivery roller pair 3/9 via an arm 11. The drive motor drives via a spur gear 14 as a spur gear countershaft formed transmission member 15, the other spur gear 16 is seated on the lower roller 3. The transfer member thus acts on a portion of the lower roller 3, which is located between the twin upper roller 9 of the left support and loading arm 6 and the twin upper roller of the next support and loading arm, not shown, left. This avoids that the transmission member 15 comes into contact with a support and loading arm 6.

The spur gear 14/16 of a draw roller auxiliary drive device 13 is advantageously accommodated in a dust-tight housing 17.

The stretching roller auxiliary drive device 13 assigned to the middle roller pair 2/8 is fastened to the right of the punch 5 on the roller carriage assigned to this roller pair and engages the lower roller 2 in addition to the twin top roller 8. This avoids that the transfer members 15 of the two adjacent lower rollers associated draw roller auxiliary drive devices 13 interfere with each other when the pairs of rollers 2/8 and 3/9 are moved together at a small distance from each other.

The draw roller auxiliary drive device 13 assigned to the input roller pair 1/7 is again to the left of the punch 5 on the roller carriage associated with this roller pair arranged. The arrangement of the roller carriage has the advantage that the draw roller auxiliary drive devices 13 migrate with an adjustment of the roll spacing and require no separate setting.

The transfer members 15 of the draw roller auxiliary drive devices 13 are so narrow that they can attack between adjacent Riffelfeldern 18 of a draw roll on this without a rifflange and thus a job of the drafting would have to be omitted.

Due to the fact that the drafting roller auxiliary drive devices 13 can be inserted as a result of their narrow design between almost any desired work stations of a drafting system, there is the advantage that they can be made small and with low power. A required performance can be achieved by appropriate number of pieces.

There is also the advantage that the draw roller auxiliary drive devices 13 to be attached to a lower roller 1, 2, 3 can be adjusted in their number of units to the tendency of the draw roller to torsion. There is no use of full-performance drafting roller auxiliary drive devices.

In some cases, this corresponds to the pitch T of the ring spinning machine

Distance between two jobs of a drafting 4 too low to allow the engagement of the transfer member 15 of a draw roller auxiliary drive device 13. In such cases, as can be seen from FIG. 6, the distances between three work stations of the drafting system can be reduced on the one hand to a distance t ₂ or increased to a distance ti. At a distance t _\ the draw roller auxiliary drive device 13 between the

Riffelfeldern 18 are attached. The attack of the drafting roller auxiliary drive device 13 is advantageously carried out at the connection points of the roller sections. As can be seen from FIG. 6, not every connection point has to be equipped with an auxiliary drive device.

Here, the pitch of the. Employment of the ring spinning machine based on the

Separation distance T of their spindles 19 remain unchanged, it also eliminates in this case no job. One of the threads 20 runs slightly obliquely on his yarn guide

21 too.

As can be seen from Figure 7, increasing the distance to two adjacent

Riffelfeldabstände be distributed. Here is the distance 3T divided into three riffler fields two reduced distances I ₄ and a more extended distance t ₃ , in which a wider draw roller auxiliary drive device 13 is arranged. In this case, two threads 20 run obliquely to the thread guides 21st

Saurer GmbH & Co. KG Z 0516 WO

Reference numeral list for Fig. 4 to 7

1 bottom roller

2 bottom roller

3 bottom roller

4 drafting system

5 punch

6 load arm

7 top twin

8 top twin

9 top twin

10 strapped turn rail

11 arm

12 drive motor

13 Draw roller auxiliary drive device

14 spur gear

15 transmission link

16 spur gear

17 housing

18 riffelfield

19 spindles

20 threads

21 yarn guides

In the figures 8 to 13 of the drawing two further exemplary embodiments of the invention are shown schematically. FIG. 8 is a view of a portion of a drafting system with a drawn draw roll motor shown inserted into a roll train; FIG. 9 shows a variant of the embodiment of FIG. 8; 10 shows a further variant of the drafting roller motor with bearings; 11 shows yet another variant of the drafting roller motor with bearings; Fig. 12 is a detail of the drafting roller motors;

Fig. 13 is a teaching for centrally adjusting the stator to the rotor.

As can be seen from FIG. 8, the drafting roller motor 1 is inserted between two corrugated areas 2, 3 of two sections 4, 5 of a lower roller 6 of a drafting system. This can be any lower roller of a drafting system. The axial length L of

Draw roller motor is so small that the given pitch T of the work stations of the drafting and the ring spinning machine need not be increased.

The draw roller motor 1 has a rotor 7 and a stator 8. The rotor 7 is mounted on the draw roller 6. This can - as indicated in Figure 8 - take place in that the roller portion 4 has a cylindrical pin 9 with subsequent threaded pin 10, by means of which it can be screwed into a bore of the roller portion 5. The bush-shaped rotor is then on the cylindrical pin 9 and is between the

Roller sections 4, 5 clamped.

In Figure 9, a solution is shown, in which the drum-shaped rotor on both sides two

Holding pin 11, by means of which it is frictionally inserted or screwed into holes in the adjacent roller sections 4 and 5. As not shown in detail, the rotor 7 can also be divided in an axis-parallel plane and be placed and fastened on the area between two Riffelfeldern 2, 3.

The rotor 7 is so long that its end faces rest directly on the adjoining Riffelfeldern 2, 3. The available space between the adjacent Riffelfeldern is thus maximally utilized by the torque-applying parts stand 8 and 7 runners. Saurer GmbH & Co. KG Z 0516 WO

In the embodiment of Figure 8, the stator 8 has no bearings. He has a tab 12, by means of which he is usually attached via a spacer 13 indicated by only with their center lines 14 screws on a rotationally fixed member 15 which is connected to a bearing 16 of the lower roller 6. As a rule, this involves the punch of the drafting system or roller carriages which are displaceable on this punch and which also contain bearings of drafting rollers. The connection with a roller carriage has the advantage that the connection of the stator to the component does not have to be readjusted when a draw roller is displaced when changing roller distances. It is understood, however, that the stand can also be connected to another, stationary, non-rotatable component. For example, the drafting system can be provided with a separate holding device for the stands 8.

The draw roller motor 1 itself, as mentioned, does not have its own bearings. The rotor 7 is mounted on the rotatable draw roller 6, the stator 8 on a component 15, which is advantageously in fixed connection with a bearing 16 of the draw roll 6, which is associated with the draw roller motor. The draw rolls of ring spinning machines have such a small impact that even in this way a very narrow gap between the stator 8 and rotor 7 is possible and precise concentricity of the drafting roller motor is ensured.

However, it is necessary to adjust the stator 8 exactly axially to the rotor 7. For this purpose, a setting gauge 17, shown for example in FIG. 13, is provided. It has a handle 18 and on a circular arm 19 three offset by 120 °, the course of the gap 20 between the stator 8 and rotor 7 corresponding, wedge-shaped tabs 21. These tabs are, as indicated in Figure 12, pressed in the direction of the arrow P in the gap 20 and thereby center the stator to the rotor. Advantageously, two adjustment gauges are provided, the tabs 21 can be inserted from both sides in the column 20. In the thus achieved coaxial position of the stator to the rotor former can be attached to the stationary or rotationally fixed member 15.

In particular, the cotton-processing drafting systems are strong by short fibers and

Dust loaded. So that this flight does not penetrate into the interior of the engine 1, seals 22 may be provided around the two gaps 20 between the stator 8 and the rotor 7. The seals are preferably formed as a felt ring and can lie in grooves 23 of the stator or the rotor. The drafting roller motor 1 can not be arranged directly next to the component punch 15, since there is a corrugated field. He can attack between the two served by the first top roller twins 24 adjacent to the punch workstations on a draw roller 6 and sits on the short spacer 13. Since he in this case, however, in the range of the axes of the top roller twins 24 and the Oberwalzentrag- and load arm 25 engages, he must often be moved into an intermediate riffling field on. For this purpose, a long spacer 26 is required, which can project the drafting roller engine far. In these cases, a distance-maintaining bearing 27 may be provided between the stator 8 and the rotor 7, which prevents touching sensitive parts of the drafting roller motor in case of unintentional one-sided loading of the stator 8. The spacer bearing 27 is not used to support the rotor 7 in the stator or the stator 8 on the rotor, but only to comply with the distance or gap 20 between the stator and rotor.

In Figure 9, the spacer bearing 27 is shown as a ball bearing. In view of the low rotational speeds of the drafting rollers and its only exceptional load, the distance bearing can also be designed as a sliding bearing. By its arrangement in the gap 20 between the stator 8 and rotor 7, it requires no bearing plate and can even be kept so narrow that it does not extend the length of the engine significantly.

Figure 10 shows an embodiment in which in the gap 20 between the with the draw roll

6 rotatable rotor 7 and the non-rotatably supported Ständer 8 two bearings 28 are provided. Since the forces occurring between rotor and stator are small, the bearings can be made narrow and accordingly reduce the achievable torque only slightly.

The stator 8 mounted on the rotor 7 must be supported on a non-rotatable component for applying the reaction force of the draw roller motor 1. In Figure 10, this is the support bar 29 of the strapping clip 30. The tab 12 on the stand engages around the support bar fork-shaped. When displacing the draw roller 6, the tab 12 remains in engagement with the support rod 29th

According to Figure 11, the embodiment may even be such that the stator 8 has narrow terminal sheet-shaped end shields 31, in which also narrow bearings 32 are arranged, which run on the draw roll 6. In particular, on the slow-speed input roller and possibly also on the center roller bearings 32 be designed as a sliding bearing. The end shields 31 are so narrow that they do not reduce the electromotive forces between the stator 8 and rotor 7.

To minimize the diameter of the outer diameter of the stator 8 can be provided to reduce the diameter of the cylindrical pin 9, on which the rotor 7 is fixed. As a result, the diameter of the drafting roller motor 1 is expanded to some extent inwardly, the components of the rotor slip inwards and those of the stator can also be expanded inwards. Thereby, the outer diameter of the stator 8 is kept at a minimum level and yet maximizes the output from the draw roller motor 1 torque.

The invention can be practiced with all types of electric motors suitable for driving drafting rollers: synchronous and reluctance motors, variable speed or non-speed controlled asynchronous motors, stepping motors, rotary solenoids. The feeding of their stand is done for speed adjustment, preferably with controlled

Frequency. In general, the stator includes field windings, the rotor permanent magnets, which are not shown in detail in the figures, rotor 7 and stator 8 are indicated in the figures only by hatching.

Saurer GmbH & Co. KG Z 0516 WO

Reference numeral list for FIGS. 8 to 13

1 stretch roller motor

2 Riffelfeld a lower roller 3 Riffelfeld a lower roller

4 bottom roller section

5 bottom roller section

6 bottom roller

7 runners of the drafting roller motor 8 stand of the drafting roller motor

9 cylindrical pin on the lower roller section

10 threaded studs on the lower roller section

11 retaining pin on the rotor 7

12 tab on the stand 8 13 Spacer

14 centerlines

15 stationary component

16 bearings of the lower roller 6

17 Adjustment gauge 18 Handle

19 circular arm

20 gap between rotor 7 and stator 8th

21 tabs

22 Seal in the gap 20 23 Groove for the seal 22

24 upper roller twin

25 Oberwalzentrag- and load arm

26 Long spacer

27 Spacer bearings in the draw roller motor 1 28 Bearings

29 Handrail of the strapping clamp

30 strapping clamp

31 end shields

32 bearings

Claims

_Patentansprüche

A ring spinning machine having drafting devices comprising a plurality of drafting rollers drivable by a drafting system main drive device at predetermined speeds and associated with the drafting rollers of the drafting roller auxiliary drive devices spaced from the drafting system main drive device, characterized in that at least individual drafting rollers ( 2, 3, 4) distributed along the length of the drafting system (1) are provided with a plurality of draw roller auxiliary drive devices (12) which apply the torsion minimizing torque to the draw rolls, the draw roll auxiliary drive devices (12) or their to the draw rolls (2, 3, 4) attacking transmission members (13) are formed so narrow that they can attack between two adjacent jobs of a draw roller to this, without the division of the jobs of the ring spinning machine should be increased or a job would have to be omitted. (Figures 1 to 3).

2. ring spinning machine according to claim 1, characterized in that the drafting main-drive device (6) is designed for the performance of the drafting system, in which no torsion occurs and the power requirement of longer drafting by a corresponding number over the length of the draw rolls (2, 3 , 4) distributed draw rolls

Auxiliary drive devices (12) is applied.

3. ring spinning machine according to claim 1, characterized in that the drafting roller

Auxiliary drive devices (12) as an electric drive (11) has a rotary magnet.

4. ring spinning machine according to claim 1, characterized in that the draw roller auxiliary drive devices (12) as an electric drive (11) soft a speed

Asynchronous motor has.

5. ring spinning machine according to claim 1, characterized in that the draw roller auxiliary drive devices (12) as an electric drive (11) has a speed-controlled asynchronous motor.

6. ring spinning machine according to claim 1, characterized in that the draw roller auxiliary drive devices (12) as an electric drive (11) comprises a synchronous motor or a reluctance motor.

7. ring spinning machine according to claim 1, characterized in that the

Energy supply device (10) is adapted to act on the electric drives (11) in dependence on their mutual distance along a draw roll (2, 3, 4) with energy.

8. ring spinning machine according to claim 1, characterized in that the

Power supply device (10) is adapted to energize the electric drives (11) of the draw roller auxiliary drive devices (12) in response to the torsional inclination of the drafting rollers to which they are associated.

9. ring spinning machine according to claim 1, characterized in that the

Energy supply device (10) is adapted to act on the electric drives (11) in response to the timing of the driving of the drafting rollers, which they are assigned, with energy.

10. ring spinning machine according to claim 1, characterized in that the

Energy supply device (10) is adapted to the electric drives (11) in response to delay-dependent driving of the drafting rollers, which they are assigned to apply energy.

11. ring spinning machine according to claim 1, characterized in that drafting rollers (2, 3, 4) preferably in the vicinity of a gear train (8) on the draw roller auxiliary drive devices (12) with their speed decreasing speed sensors (17, 18, 19) are the energy supply means (10) for the speed-dependent delivery of energy to the drives of the draw roller auxiliary drive devices (12) act.

12. Ring spinning machine according to claim 1, characterized in that the delay-appropriate speed of the respective drafting rollers (2, 3, 4) predetermining supply frequency of synchronous motors (20, 21, 22) of the drafting device main drive device (6) also for acting on the drafting roller Auxiliary drive devices (12) driving synchronous motors (11) or reluctance motors is used.

13. ring spinning machine according to one or more of the preceding claims, characterized in that the drive of the drafting rollers (2, 3, 4) solely by draw roll Auxiliary drive devices (12) with synchronous motors, reluctance motors or variable-speed asynchronous motors, which are acted upon by a power supply device (10) through which the drafting rollers are pushed the distortion-correct speeds.

14. A ring spinning machine with drafting systems with a plurality of drafting rollers, the top rollers are formed as loaded by load-and-load arms Oberwalzenzwillinge and wherein each draw roll has a plurality of spaced-apart draw roll auxiliary drive devices, characterized in that the distance (tl) between two in the longitudinal direction of the drafting system (4) adjacent to work stations of the drafting system, in which a draw roller auxiliary drive device (13) on a lower roller (3) engages, so increased and the distance (t2) to the next adjacent workstation of the drafting system is reduced such that the total distance between the three neighboring jobs

Double the normal distance (T) of the four jobs corresponds. (Figures 4 to 7).

15 ring spinning machine with drafting according to claim 14, characterized in that the distance (tl) between two in the longitudinal direction of the drafting (4) adjacent work stations of the drafting, in which a draw roller auxiliary drive device (13) on a lower roller (3) engages, in such a way is increased and the distance (t2) between the two adjacent work stations of the drafting system is reduced such that the total distance between the four adjacent jobs corresponds to three times the normal distance (T) of the four jobs.

16 ring spinning machine according to claim 14 or 15, characterized in that the draw roller auxiliary drive devices (13) between working points on draw rolls (1, 2, 3) attack, which are arranged offset from each other in the longitudinal direction of the ring spinning machine.

17. ring spinning machine according to one of claims 14 to 16, with the drafting rollers overlapping bearing punches and draw roller carriage, characterized in that the draw roll

Auxiliary drive devices (13) are attached to the bearing punches (5) or to the displaceable in the bearing punches drafting roller carriage.

18. Ring spinning machine according to claim 17, characterized in that the draw roller auxiliary drive devices (13) of adjacent draw rolls (1/2, 2/3) alternately left and Saurer GmbH & Co. KG Z 0516 WO

are arranged on the right of a bearing punch (5) and on the draw roll slidable in the bearing punch.

19. Ring spinning machine according to one or more of claims 14 to 18, characterized in that the draw roller auxiliary drive devices (13) and / or their

Transmission members (15) on the drafting rollers (1, 2, 3) are housed in a preferably dust-tight encapsulated housing (17).

Drawwrap motor for draw rolls of spinning machines, with stand and runner, for placement on and between draw rolls, characterized in that by maximizing the axial length (L) of runner (7) and stand (8) and minimizing the outside diameter (D) of the stator and while maximizing the output from the draw roller motor (1) torque of the draw roll motor between two adjacent Riffelfeldern (2, 3) of a draw roll (6) and in the distance to an adjacent draw roll accommodated and the desired performance can be applied. (Figures 8 to 13).

21. Draw roller motor according to claim 20, characterized in that is dispensed with end shields by the rotor (7) of the draw roller motor (1) directly on the draw roller (6) is fixed, to which it is associated and the stator (8) of the motor ( 1) is fastened or supported on a non-rotatable component (15, 29) of the drafting system. (Figures 8, 9, 10)

22. Stretching roller motor according to claim 20, characterized in that the rotor (7) of the drafting roller motor (1) is mounted directly on the draw roller (6), to which it is associated and the draw roller motor (1) only a distance-holding bearing (27) in Drehspalt (20) between the stator (8) and rotor (7), by which a mutual contact between the stator and rotor is prevented. (Fig. 9)

23. Draw roller motor according to claim 20, characterized in that the rotor (7) of the draw roll motor (1) is mounted directly on the draw roll (6), to which it is associated and the draw roller motor (1) in the gap (20) between stand (8 ) and rotor (7) bearing (28) which support the stator on the rotor and wherein the draw roller motor is supported on a non-rotatable member (29) of the drafting system. 24. Draw roller motor according to claim 21, characterized in that the runner (7) of the draw roll motor (1) is mounted directly on the draw roll (6) to which it is associated and the draw roll motor (1) only sheet-shaped end shields ( 31), in which bearings _

(28) are arranged, by which the stator (8) is mounted on the draw roll and wherein the motor is supported on a non-rotatable member (29) of the drafting system. (Fig. 11)

25. Draw roller motor according to claim 21, characterized in that the rotor (7) of the draw roll motor (1) is mounted directly on the draw roll (6), to which it is associated and that the draw roll in the region in which the runner mounted on it is diminished in diameter (d).

26. Draw roller motor according to claim 25, characterized in that a roll strand section (4) of the draw roll (6) between two Riffelfeldern (2, 3) has a cylindrical

Receiving (9) for fixing the rotor (7) of the drafting roller motor (1) and by means of a subsequent to the cylindrical receptacle thread (10) in a subsequent roller section (5) can be screwed.

27. Stretching roller motor according to claim 25, characterized in that the rotor (7) of the drafting roller motor (1) with on both sides projecting, in subsequent bores Walzenstrang- sections (4, 5) insertable retaining pin (11).

28. Draw roller motor according to claim 22, characterized in that the non-rotatable component (15) includes a bearing (16) for the draw roll (6).

29. Stretching roller motor according to claim 28, characterized in that the non-rotatable component is a punch (15) of the drafting system or a roller carriage mounted in a punch.

30. Stretching roller motor according to claim 22, characterized in that the component is a

Unterriemchen- clamping bracket (30) retaining rod (29).

31. Stretching roller motor according to claim 22, characterized in that a Unterriemchen- turning rail serves as a non-rotatable component.

32. Draw roller motor according to claim 20, characterized in that the rotor (7) and the stator (8) the clearance between two adjacent Riffelfeldern (2, 3) of a

Take drafting roller (6) as completely as possible.

33. Stretching roller motor according to claim 22, characterized in that the stator (8) of the

Motors (1) on which a bearing (16) of the draw roll (6) exhibiting component (15) is coaxial with the rotor storable and adjustable. Saurer GmbH & Co. KG Z 0516 WO

34. Stretching roller motor according to one or more of claims 20 to 33, characterized in that it is associated with at least one setting gauge (17) having at a pitch circle (19) three offset by 120 ° to each other, wedge-shaped tabs (21) which in Direction of the arrow P in the gap (20) between the stator (8) and rotor (7) can be inserted and centered the stand to the rotor in the position in which it is to be fastened to the component (15).

35. Draw roller motor according to one or more of claims 20 to 34, characterized in that in the gaps (20) between the stator (8) and rotor (7) seals (22) are arranged, the penetration of dust and flight into the interior of the Prevent motors (1).

36. Ring spinning machine with a drafting roller motor according to one of claims 20 to 35.