CN114945714B - Loading unit for a drafting system and drafting system for a textile machine - Google Patents
Loading unit for a drafting system and drafting system for a textile machine Download PDFInfo
- Publication number
- CN114945714B CN114945714B CN202080094140.3A CN202080094140A CN114945714B CN 114945714 B CN114945714 B CN 114945714B CN 202080094140 A CN202080094140 A CN 202080094140A CN 114945714 B CN114945714 B CN 114945714B
- Authority
- CN
- China
- Prior art keywords
- loading unit
- shaft
- transmission element
- force transmission
- force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004753 textile Substances 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 86
- 239000002131 composite material Substances 0.000 claims description 27
- 239000000835 fiber Substances 0.000 claims description 27
- 239000011796 hollow space material Substances 0.000 claims description 15
- 238000009987 spinning Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 4
- 238000007378 ring spinning Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/46—Loading arrangements
- D01H5/52—Loading arrangements using fluid pressure
- D01H5/525—Loading arrangements using fluid pressure for top roller arms
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The invention relates to a loading unit (6) for a drafting system of a textile machine, for receiving a drafting system roller comprising a shaft (8), wherein the loading unit (6) has a guide device (7) for guiding the shaft (8) and has a loading device (9) by means of which a pressing force can be applied to the shaft (8) independently of the guide device (7), wherein the loading device (9) comprises a force transmission element (14) which is in operative connection with the shaft (8) when the loading unit (6) is in operation and by means of which the pressing force can be transmitted to the shaft (8), wherein the force transmission element (14) is supported in a floating manner in a receiving portion (28) of the loading unit (6).
Description
Technical Field
The invention relates to a loading unit for a drafting system of a textile machine for receiving a drafting system roller comprising a shaft, wherein the loading unit has a guide device for guiding the shaft and has a loading device by means of which a pressing force can be applied to the shaft independently of the guide device.
A drawing system for a textile machine is also described, having at least one roller assembly for drawing a fiber composite, wherein the roller assembly has at least one roller and at least one corresponding counter roller, between which the fiber composite can be guided in a clamping manner, wherein the roller comprises a shaft, and at least one loading unit, which is configured to apply a pressing force to the shaft and to guide the shaft.
The invention further relates to a textile machine, in particular a drawing frame, a ring spinning machine or an air spinning machine, having at least one drawing system for drawing at least one fiber composite.
Background
A corresponding loading unit and a drafting system for textile machines equipped with the loading unit are known in the prior art in maximally different embodiments. In general, drawing systems are used to draw the fiber composite so that it can be finally spun into a roving or yarn by means of a spinning device. A generic drawing system is described, for example, in DE 33 25 A1, wherein the drawing system is connected upstream of an air spinning nozzle in which the fiber material drawn by the drawing system can ultimately be spun into a yarn.
The drawing system rollers are acted upon, for example, by a movably mounted loading cylinder, so that the fiber composite can be guided in a clamped manner between the loaded drawing system rollers and the corresponding counter rollers. In this case, the application cylinder generally acts directly on the bearing of the corresponding drafting system roller to be applied. In the event of alternating loading of the drafting system rollers and possible lateral forces, in particular due to uneven thickness of the fibre composite, at least short-term jamming (VERKANTEN) of the movable part can occur in the loading cylinder. This is also known as the "drawer effect" (Schubladeneffekt) and results in uneven pulling of the fiber composite. Furthermore, the periodic alternation between static friction and sliding friction in these loading devices can have a negative effect on the drawing quality of the drawing system.
Likewise, for example, in DE 974 221C roller guides are proposed, which are articulated via levers and act on a common loading device. In this way, the drawer effect can be avoided, but in this embodiment, a second, albeit very small, directional component of the pressing force acting through the loading device is produced by the rotation about the joint, which second directional component can have a negative effect on the pulling of the fiber composite and on the uniformity of the roller wear.
Disclosure of Invention
The object of the present invention is to provide a loading unit, a drafting system and a textile machine which eliminate or reduce at least one of the abovementioned disadvantages.
The loading unit according to the invention for a drafting system of a textile machine is used for receiving a drafting system roller, which comprises a shaft, the loading unit having a guide device for guiding the shaft and having a loading device by means of which a pressing force can be applied to the shaft independently of the guide device. The drawing system comprises at least one roller assembly for drawing the fiber composite, wherein the roller assembly has at least one roller and at least one corresponding counter roller, between which the fiber composite is guided clampingly, wherein the roller comprises a shaft. The drafting system further comprises at least one corresponding loading unit, which is designed to apply a pressing force to the shaft and to guide the shaft. The loading unit further comprises a guide device for guiding the shaft and comprises a loading device by means of which a pressing force can be applied to the shaft independently of the guide device.
In other words, the loading unit according to the invention for a drafting system of a textile machine serves to receive a drafting system roller, which comprises a shaft, which loading unit generally has a guide device for guiding the shaft and has a loading device by means of which a pressing force can be applied to the shaft independently of the guide device. The loading device comprises a force transmission element which is in operative connection with the shaft when the loading unit is in operation and by means of which a pressing force can be transmitted to the shaft, wherein the force transmission element is supported in a floating manner in a receptacle of the loading unit.
In the loading unit or the drafting system equipped with at least one loading unit according to the invention, the main innovation is to separate the loading and guiding of the rolls. The invention is based on the following recognition: the main disadvantage of the known loading units or drafting systems is caused by the common loading and guiding of the rollers. Preferably the shaft is movable relative to the stationary guide means. Thereby, the movement of the shaft may be limited such that no undesired lateral force components occur.
The loading device comprises, for example, a force generator and a force transmitting element. The manner in which the force generator first generates the force is not critical to the present invention. It is conceivable that the force generator is operated on the basis of electromagnetic, pneumatic, hydraulic principles or by means of the tension of a spring element. Advantageously: the force transmission element has sufficient play relative to the housing of the loading unit, for example, so that it does not catch during small movements.
It is common for the rollers of the drawing system to be designed for drawing two fiber composites, i.e. for the two roller sections to be arranged along the axis in particular symmetrically with respect to the guide. The counter roller is generally supported such that it can rotate but its axis is stationary. The pressing force is usually applied only via rollers.
According to the invention, not only in the case of the proposed loading unit but also in a drafting system equipped with the loading unit: the loading device comprises a force transmission element which is in operative connection with the shaft when the loading unit or the drafting system is in operation and by means of which the pressing force can be transmitted to the shaft. The force transmission element is a component of the loading device which is in operative connection with the force generator. At the same time, the force transmission element is also in operative connection with the roller or its shaft, so that the force generated by the force generator is transmitted via the force transmission element to the shaft.
According to the invention it is now provided that: the force transmission element is supported in a floating manner in a receptacle of the loading unit. This means that the force transmission element can be moved relative to the receptacle, wherein in this case a movement gap space is present between the force transmission element and the receptacle in a direction running perpendicular to the axis of rotation of the roller and perpendicular to the direction of the force exerted by the force generator on the force transmission element.
If the force transmission element is now moved by the force generated by the force generator in the direction of the roller axis, it is not guided in a form-fitting manner perpendicular to its direction of movement through the receptacle. In contrast, a relative movement can occur between the receptacle and the force transmission element in a direction running perpendicular to the direction of movement. Thereby preventing the force transmission element from seizing up relative to the receiving portion. The drawer effect known from the prior art therefore does not occur in the solution according to the invention.
Particularly advantageous are: the receptacle partially encloses the force transmission element, wherein a gap is present between the receptacle and the force transmission element. The receptacle is preferably a component of the loading device or of the drafting system, which surrounds the force transmission element at least in a defined region and preferably also the force generator. The receptacle serves here, inter alia, to protect the force generator from external forces, wherein the force generator is preferably completely enclosed by the receptacle.
The receptacle can be formed, for example, by a single wall section of the drawing system or of the loading unit. The receptacle can also be present as an insert which is arranged in the free space provided for this purpose of the drafting system or the loading unit and is fixed relative to the housing of the drafting system or the loading unit. In this case it is advantageous that: the receiving portion encloses the force transmitting element and/or the force generator like a clip.
Also advantageous is: the force-transmitting element is freely movable when the loading unit is operating normally, i.e. when the drafting system is operated and the fibre composite is being stretched, so that the position of the force-transmitting element is aligned with the position of the shaft. In this case, the force-transmitting element can be moved in the direction of the axis of the roller in operative connection with the force-transmitting element when the force-transmitting element is acted upon by the force generator. Likewise, a movement in the opposite direction may occur when a small force is transmitted by the force generator or no force is transmitted to the force transmitting element at all. Finally, the floating support allows the force transmission element to move perpendicular to the two mentioned directions of movement and perpendicular to the axis of rotation of the roller.
Particularly advantageous are: both the guiding means and the force transmission element of the loading means act directly on the shaft. Directly, in this context, means that there is no additional intermediate support member. The guide means and the loading means can thus each act directly and separately from each other on the shaft. With the additional intermediate support member, the risk of undesired force components or jamming increases.
Also advantageous is: the guiding means and the force transmission element act on different parts of the shaft. As far as possible, the interaction of the guide means and the loading element or the force transmission element of the loading element is avoided. In order to load the rollers uniformly, it is particularly advantageous: the loading element acts on the shaft in the region of the axial middle of the roller. Both the guide means and the force transmission element are for example arranged symmetrically with respect to the axial middle of the roller. The force transmission element can be enclosed, for example, in the axial direction by the guide device.
In an advantageous development of the loading unit or of the drafting system equipped with the loading unit, the loading device has a resilient force generator. In interaction with the pressure medium, the pressing force can be generated via the force generator and transmitted via the force transmission element to the shaft or the roller. Liquid and gas are considered as pressure medium. It is particularly preferred to use air as pressure medium, for example from a compressor or compressed air supply of the textile machine. The force generator is connected to the compressor or the compressed air supply, in particular via a line and possibly via an additional valve. Preferably the force generator is delimited by a housing section.
The force generator has, for example, expansion ribs which allow for a particularly controlled expansion and contraction of the force generator. The expansion ribs may be, for example, concentric depressions in the surface of the force generator that provide a surplus of material for expansion of the force generator.
Particularly advantageous are: the force generator is configured as a bellows. The bellows is a component which is configured at least in sections as elastic and can be expanded and contracted. After being inserted into the drawing system, the bellows is connected to a compressed air source via a compressed air line of the drawing system. The force exerted via the bellows on the force transmitting element in connection with the bellows will also increase or decrease depending on the air pressure provided by the compressed air source. The increase in the internal pressure acting on the inner wall causes, in particular, an increase in the resultant force generated by the internal pressure. The volume of the bellows generally increases when the force transmitting element or shaft is displaced (or deformed) by the resultant force.
If the internal pressure is kept constant (for example by means of an open fluid connection with a large pressure tank), the force exerted by the internal pressure on the shaft is also kept constant, irrespective of the corresponding volume of the bellows (or the position of the shaft). By varying the air pressure, the bearing pressure of the rollers of a roller pair on the respective pair of rollers can be adjusted in a fine and reproducible manner.
Also advantageous is: the force transmission element is constructed as a hollow body. The force transmission element has in particular a first hollow space. The bellows furthermore has a second hollow space, wherein the first hollow space and the second hollow space form a common and externally closed pressure space. The pressure space is in fluid connection with a compressed air line of the drawing system after the loading unit is inserted into the drawing system, via which fluid connection the pressure space is supplied with compressed air during operation of the drawing system. The bellows and the force transmission element may for example be glued to each other. It is also particularly advantageous that: the compressed air line opens directly into the force transmission element.
Furthermore, it is advantageous that: the force generator and the force transfer member have a curved interface. The curved contact surface prevents uncontrolled deformation of the force generator in this region. The compaction behaviour can thus be better controlled. In addition, the force generator and the force transmission element can engage in at least slight form-locking fashion with one another. This promotes a better definition of the relative positions of the force generator and the force transmitting member. The curved contact surface may be at least sectionally circular, for example in a side view.
For optimal force transmission between the force generator and the force transmission element, it is advantageous that: the force transmission element is convex and the force generator is concave in the region of the contact surface. The concave shape of the force generator can prevent uncontrolled deformations of the force generator in addition to this.
Furthermore, it is particularly advantageous that: the guiding means is configured as a linear guide. The linear guide limits the freedom of movement of the shaft or roller to one direction. This is advantageous because the additional freedom of movement is generally more disadvantageous and therefore undesirable.
The guide means may for example comprise a plurality of parallel arranged runners in which the axes of the rollers are located. The width of the guide means in this case corresponds substantially to the diameter of the shaft. The guide device may also have an opening, for example, on the underside, so that the roller can be removed for replacement or for maintenance purposes.
Furthermore, it is advantageous that: the guiding means are part of the housing of the loading unit. The guide device can thus be constructed in a particularly material-saving or cost-saving manner. As already briefly mentioned, the guide means consist, for example, of one or more milled-out parts in the housing of the loading unit, in which the shaft is guided. The housing of the loading unit is made of metal, for example, in order to obtain the necessary rigidity for the guide roller.
Also advantageous is: the force transmission element has at least one stop, for example in the form of a stop cam, which engages in a slot of the loading unit. The stop may also be configured as a surface or ridge with which the force transmitting element comes into contact when no force is applied by the force generator. The maximum movement of the force transmission element can thereby be limited, in particular to prevent malfunctions and/or damage of the loading unit. Although the stop cam can in principle be used for guiding the force transmission element, it is advantageous if: the force transmission element is freely movable during normal operation of the loading unit. The position of the force transmission element is aligned in particular with the position of the shaft. In this way, a collision between the guide device and the stop cam guided in the slide groove and thus possible jamming is avoided.
Particularly advantageous are: the force transmission element has a recess in a side view in the contact region with the shaft. By means of this recess, the force transmission element and the shaft can be stably aligned with respect to each other. As already described, the force transmission element is in this case fitted to a shaft guided by the guide device.
The recess may have a trapezoidal shape in particular in a side view. It is envisaged that the trapezoid is an isosceles trapezoid. Likewise, the recess may be circular or oval in side view. In the case of a circular recess, the recess may, for example, be of the same shape as the surface of the shaft. Furthermore, the void may have a triangular shape. The recess can in particular be configured in the form of an isosceles or equilateral triangle. The force transmission element may have a low friction surface in the contact area, for example, to minimize wear.
Particularly advantageous are: the shaft has at least one diameter step for axial positioning in the loading unit. In other words, the shaft has at least two sections with different diameters. Preferably, the shaft has at least two diameter steps and in particular one section with a smaller diameter and at least two sections with a larger diameter. Diameter sizing can be used in an efficient manner for axial positioning of the rolls. In the case of a plurality of diameter steps, the diameter steps are preferably arranged symmetrically with respect to the axial center of the roller, wherein, for example, the section with the smaller diameter is arranged closer to the axial center. The diameter grading can be produced, for example, by turning, milling and/or grinding.
The section of the shaft having the larger diameter in particular rests against the guide or the force transmission element and thereby prevents an axial movement of the roller.
Furthermore, it is advantageous that: the loading unit comprises an especially elastic holding element, which is preferably designed to hold the shaft of the drafting system roller in the region of action of the guide device. The rollers need to be lifted from the counter-rollers at the time of maintenance of the drafting system. The holding element prevents, in particular, the roller from falling out of the guide or from the loading unit in this case. However, this particularly elastic holding element allows the roller to be removed and replaced efficiently, for example.
The holding element is preferably arranged on the underside of the guide device and/or the loading unit housing. Different elastic materials, such as metal, synthetic materials and/or silicone, are conceivable for the holding element. The holding element may be constructed in one piece or in multiple pieces. It is conceivable that: if the guide device is configured in a multi-piece manner, for example in the form of a plurality of runners as already described, the retaining element is still configured in one piece and spans, for example, the intermediate space between the runners.
The loading unit or the drafting system equipped with the loading unit can have a controller which is configured to control the pressing force. The controller may, for example, control a pressure regulator which, depending on the required load, directs the loading device to supply pressure medium.
It is furthermore conceivable that the loading unit or the drafting system equipped with the loading unit comprises at least one sensor which is configured to detect a movement of the roller, the force transmission element and/or the force generator. The pressing force can thus be adjusted in the interaction with a correspondingly configured control unit.
It is conceivable that the force transmission element is constructed as a hollow body. On the one hand, material costs can be saved. On the other hand, the lower weight allows the force transmission element to move equally and possibly faster with less effort.
For maintenance purposes, the drafting system may have, for example, at least one folding mechanism which allows the rollers and possibly the entire loading unit to be lifted from the counter-rollers.
The textile machine according to the invention is configured as a drawing frame, a ring spinning machine or an air spinning machine and has at least one drawing system for drawing at least one fiber composite, for which: the drafting system is constructed in accordance with the foregoing description. As already described, abrupt transitions and undesired lateral force components between drawer effects, static friction and sliding friction are thereby avoided.
Such textile machines generally have a drawing system with a plurality of roller assemblies, wherein the roller assemblies are rotated at different speeds for drawing the fiber composite. Each roller assembly is associated with a loading unit, for example. It is conceivable that individual loading units generate the pressing force in different ways.
It is then particularly advantageous: the textile machine has at least one pneumatic loading unit and at least one spring-loaded loading unit. For example, it is conceivable that the control of the pressing force is only necessary at certain points of the drawing system. Here, costs can be saved by a less complex design of the spring-loaded loading unit. Furthermore, the following advantages exist in the case of a pneumatic loading unit: in the longer rest state of the textile machine, the load can be removed or partially removed, so that deformations of the respective rolls can be avoided.
The pneumatic loading unit may be arranged, for example, on the first roller assembly and/or on the last roller assembly of the drafting system with respect to the transport direction of the fibre composite. It is likewise conceivable for the pneumatic loading unit to be arranged in addition or only on a small belt cylinder of the drafting system.
If the spinning machine is configured as an air spinning machine, for example, a spinning nozzle is connected downstream of the drafting system, in which spinning nozzle the fibre composite is rotated by means of a swirling air flow. In particular, a draw-off roller pair for drawing off the produced yarn can be connected downstream of the spinning nozzle.
Drawings
Aspects of the invention are described in detail with reference to the embodiments and the accompanying description illustrated in the drawings below. Wherein:
Fig. 1 shows a schematic side view of a drafting system according to the invention as part of a textile machine;
fig. 2 shows a cut-away side view of a first embodiment of a loading unit of a drafting system according to the invention;
FIG. 3 shows a side view of the loading unit from FIG. 2;
FIG. 4 shows a further side view of the loading unit from FIG. 2;
Fig. 5 shows a sectioned front view of a loading unit of the drafting system according to the invention;
FIG. 6a shows a section of a further embodiment of a load unit according to the invention in a first state; and
Fig. 6b shows the section from the embodiment of fig. 6a in a second state.
Detailed Description
In the following description of the figures, the same reference numerals are used for respectively equivalent and/or at least comparable features in the different figures. Individual features, their design and/or mode of action are mostly only described in detail when they are first mentioned. If individual features are not explained in detail again, their design and/or mode of action corresponds to the described design and mode of action of features of the same function or of the same name.
Fig. 1 shows a schematic side view of a drafting system 1 according to the invention with a plurality of roller assemblies 2. The roller assemblies 2 each include a roller 3 and a corresponding counter roller 4. The fibre composite 5 can be guided and pulled in a clamped manner between the roller 3 and the corresponding counter roller 4. Each roller assembly 2 is associated with a loading unit 6, which is configured to guide and load the respective roller 3. For this purpose, the loading unit 6 has in each case a guide 7 (see fig. 3) for guiding the shaft 8 (see fig. 2) of the respective roller 3 and a loading device 9 (see fig. 2) according to the invention, by means of which a pressing force can be applied to the respective shaft 8 independently of the guide 7.
The drafting system 1 is in particular part of a textile machine 10, which in the present example is configured as an air spinning machine. Correspondingly, downstream of the drafting system 1, a spinning nozzle 11 is arranged, in which the fibre composite 5 is rotated. The resulting yarn is currently drawn by a take-off roll pair 12. Alternatively, the drafting system 1 can of course also be used in a ring spinning machine, roving frame or drawing frame.
For example, the first and last loading units 6 of the drafting system 1 are configured as pneumatic loading units 6. The pneumatic loading unit 6 is connected in particular to a compressed air supply, not shown, of the textile machine 10 via a compressed air line 13. The intermediate loading unit 6 is configured, for example, as a spring-loaded loading unit 6.
Fig. 2 shows a more detailed sectional side view of a loading unit 6 according to the invention of a drafting system 1 according to the invention. Only the shaft 8 of the roller 3 can be seen in this view. The shaft 8 is subjected to a pressing force by a loading device 9 comprising a force transmitting element 14 and in this example a force generator 15. The pressing force is here generated by applying compressed air to the force generator 15. For controlled expansion behaviour, the force generator 15 has expansion ribs 16. The force generator 15 is in this case constructed as a bellows 24.
The loading device 9 is surrounded by a housing 17, in which a part of the compressed air line 13 runs, for example. Furthermore, a control and/or a valve (not shown) can be arranged in the housing 17, for example, which control and/or valve regulates the pressure of the inflowing compressed air. The housing 17 likewise also defines, for example, a region for the expansion of the force generator 15. The housing 17 can also limit the maximum movement of the force transmission element 14 in the direction of the shaft 8, for example, in a form-locking manner, so that the force transmission element 14 does not fall out of the housing 17, in particular during maintenance. For this purpose, the force transmission element 14 may have, for example, a cross section which is shown here and which tapers substantially in the direction of the shaft 8. In normal operation of the drafting system 1, the force transmission element 14 has a certain play space within the housing 17, so that jamming of the force transmission element 14 is avoided. This is ensured by a corresponding free space 30 between the force transmission element 14 and the housing 17.
The force generator 15 and the force transmission element 14 are in contact on a curved contact surface 18, wherein the force transmission element 14 is convex and the force generator 15 is concave in the region of the contact surface 18. This ensures that the contact force transmitted via the curved contact surface 18 acts in the direction of the shaft 8.
The force transmission element 14 has a recess 19 in the contact region with the shaft 8, which recess is adapted at least partially to the shape of the shaft 8. Thereby ensuring, among other things, that the position of the force transmission element 14 is aligned with the position of the shaft 8. The force transmission element 14 is then supported in a floating manner in the example shown. The recess 19 is trapezoidal in this example. The recess 19 has in particular the shape of an isosceles trapezoid.
The loading unit 6 has a holding element 20 which prevents the roller 3 from falling out of the loading unit 6, for example, when the loading unit 6 is lifted for maintenance purposes. The holding element 20 is arranged, for example, on the underside of the housing 17. In order to still be able to achieve a simple removal and reinsertion of the roller, the holding element 20 is in particular elastic.
Fig. 3 and 4 show the loading unit 6 from fig. 2 in a side view, not broken away. Fig. 3 furthermore only shows the shaft 8 of the roller 3. Fig. 4 additionally shows the outer region of the roller 3, which serves for guiding and pulling the fiber composite 5.
The content shown in fig. 3 is, among other things, visible to the guiding means 7. The guide means 7 are currently configured as linear guides and consist essentially of two parallel elongated recesses in the housing 17 of the loading unit 6. The width of the recess corresponds substantially to the diameter of the shaft 8. Advantageously, the guiding and loading of the roller 3 are independent of each other.
The housing 17 has a further recess in the form of a slot 21, into which a stop cam 22 of the force transmission element 14 engages. The stop cam 22 may limit the vertical movement of the force transfer element 14. In particular, by limiting the movement of the force transmission element 14 in the direction of the force generator 15, possible damage to the loading unit 6 can be avoided. At the same time, the stop cam 22 is configured such that it does not interfere with the floating support of the force transmission element 14 described herein.
Fig. 5 shows a sectioned front view of the loading unit 6 and the rollers 3 of the drafting system 1. The symmetrical structure of the loading unit 6 and the roller 3 is mainly clearly visible here. On both sides of the housing 17 there are sliding grooves 21 for stop cams 22 which are likewise arranged on both sides of the force transmission element 14.
It is furthermore clear that not only the guiding means 7 but also the force transmission elements 14 of the loading means 9 act directly but in different places on the shaft 8 of the roller 3. The roller 3 likewise has two symmetrical outer regions for pulling two fiber composites 5. For axial positioning, the shaft 8 furthermore has a diameter step 23, wherein on both sides the region with the larger diameter rests against the housing 17 of the loading unit 6 or against the guide 7.
Fig. 6a and 6b show fragments of further embodiments of the loading unit 6 according to the invention, of which only the essential components for understanding the invention are shown. Of course, the drafting system 1 with the loading unit 6 comprises other elements, such as not shown pairs of rollers or the actual roller bodies of the rollers 3, which are not shown for reasons of clarity.
Fig. 6a shows the main components of the loading device 9. The loading device comprises a force transmission element 14 which delimits a first hollow space 25 which is open upwards (see fig. 6 a). The loading device 9 further comprises a force generator in the form of a bellows 24 which is open downwards and delimits a second hollow space 26. The first hollow space 25 and the second hollow space 26 together form a common pressure space 15, which is connected to the compressed air line 13. A defined air pressure can be applied to the pressure space 15 via the compressed air conduit 13, wherein the volume of the second hollow space 26 can be changed by contraction or expansion of the bellows 24. Fig. 6a shows the expanded state of the bellows 24. When the illustrated region of the drafting system 1 moves upwards, the force transmission element 14 can, for example, have this illustrated position, so that the illustrated shaft 8 is moved away from the non-illustrated counter roller 4. This is for example the case when the drafting system 1 is unloaded/opened for repair.
Fig. 6b shows the loaded state of the loading device 9. This state is achieved when the shown component is moved in the direction of the mentioned counter roll 4 such that the roll 3 and the counter roll 4 are in contact and/or are spaced apart from each other by the fibre composite running between the roll 3 and the counter roll 4. If the air pressure in the common pressure space 15 (see fig. 6a, not shown in fig. 6 b) is increased in the state shown in fig. 6b, this will cause a slight expansion of the bellows 24 and at the same time transmit the force generated by the air pressure via the force transmission element 14 to the shaft 8 shown.
As can also be seen in the drawing, the area of the bellows 24 and of the force transmission element 14 is also surrounded towards the outside by a receptacle 27 shown in section, which is connected to the housing 17 of the drafting system 1 (housing 17, which also comprises the guide 7, only indicated in fig. 6 b). In the case of the previously described figures, the receptacle 27 is formed directly by a section of the housing 17. That is, the receiving portion 27 does not necessarily have to exist as a separate member from the housing 17.
In the example shown, the receptacle 27 comprises two holding sections 28 which come into contact with corresponding abutments 29 of the force-transmitting element 14 when the loading device 9 is in the unloaded state (see fig. 6 a). The force transmission element 14 and the bellows 24 are thereby prevented from possibly falling out of the receptacle 27 in the unloaded state.
As can be seen in the present two figures, there is a free space 30 between the receptacle 27 and the force-transmitting element 14 in each position of the force-transmitting element 14. This allows a slight movement of the force-transmitting element 14 sideways with reference to the drawing and thus a certain play with respect to the receptacle 27. That is to say, the force transmission element 14 is also supported in a floating manner.
If a defined air pressure is applied to the bellows 24 and the force-transmitting element 14 via the compressed air line 13, the force-transmitting element 14 is pressed against the shaft 8.
The thick or thin sections of the fibre composite pulled by the drawing system 1 determine that a although very small movement of the force transmission element 14 relative to the receptacle 27 can occur continuously. In this case, the force transmission element 14 is effectively prevented from being clamped or jammed in the receptacle 27 by the floating support. The drawer effect known from the prior art is therefore not present in the solution according to the invention, so that the fibre composite can be stretched very accurately and without errors.
The invention is not limited to the embodiments shown and described. Variations and combinations of features in the framework of the claims may equally be made, although these features are shown and described in different embodiments.
List of reference numerals:
1. expansion rib of drafting system 16
2. Roller assembly 17 housing
3. Contact surface of roller 18
4. Gap part of the pair of rollers 19
5. Fiber composite 20 retaining element
6. Loading unit 21 chute
7. Guide 22 stops the cam
8. Diameter grading of shaft 23
9. Loading device 24 bellows
10. First hollow space of spinning machine 25
11. Second hollow space of spinning nozzle 26
12. Receiving portion of the draw-off roller pair 27
13. Compressed air line 28 holding section
14. Force transmission element 29 fitting portion
15. Free space of force generator 30
Claims (18)
1. Loading unit (6) for a drafting system (1), which loading unit is used for a textile machine (10), for receiving a drafting system roller (3), which comprises a shaft (8), wherein the loading unit (6) has a guide device (7) for guiding the shaft (8) and has a loading device (9) by means of which a pressing force can be applied to the shaft (8) independently of the guide device (7), characterized in that the loading device (9) comprises a force transmission element (14) which is in operative connection with the shaft (8) when the loading unit (6) is in operation and by means of which the pressing force can be transmitted to the shaft (8), wherein the force transmission element (14) is floatingly supported in a receiving portion (27) of the loading unit (6) in such a way that the receiving portion (27) partially encloses the force transmission element (14), wherein a free space between the receiving portion (27) and the force transmission element (14) is allowed to move in relation to the free space (30) in each case between the receiving portion (27).
2. Loading unit (6) according to claim 1, characterized in that the force transmission element (14) is freely movable in normal operation of the loading unit (6) such that the position of the force transmission element (14) is aligned with the position of the shaft (8).
3. Loading unit (6) according to claim 1 or 2, characterized in that not only the guiding means (7) but also the force transmission element (14) of the loading means (9) act directly on the shaft (8).
4. Loading unit (6) according to claim 1 or 2, characterized in that the guiding means (7) and the force transmission element (14) act on different parts of the shaft (8).
5. Loading unit (6) according to claim 1 or 2, characterized in that the loading means (9) have a resilient force generator (15).
6. Loading unit (6) according to claim 1 or 2, characterized in that the loading means (9) has a pneumatic force generator.
7. Loading unit (6) according to claim 1 or 2, characterized in that the loading means (9) have a resilient force generator (15) in the form of a bellows (24).
8. Loading unit (6) according to claim 7, characterized in that the force transmission element (14) is configured as a hollow body, wherein the force transmission element (14) has a first hollow space (25), wherein the bellows (24) has a second hollow space (26), and wherein the first hollow space (25) and the second hollow space (26) form a common and externally closed pressure space (15), wherein the pressure space (15) is in fluid connection with a compressed air line (13) of the drafting system (1), via which compressed air can be applied to the pressure space (15) when the drafting system (1) is in operation.
9. Loading unit (6) according to claim 8, characterized in that the bellows (24) and the force transmission element (14) have a curved contact surface (18), wherein in the region of the contact surface (18) the force transmission element (14) is convex and the pressure space (15) is concave.
10. Loading unit (6) according to claim 1 or 2, characterized in that the guiding means (7) are configured as linear guides and/or that the guiding means (7) are part of a housing (17) of the loading unit (6).
11. Loading unit (6) according to claim 1 or 2, characterized in that the force transmission element (14) has at least one stop, wherein the stop has a stop cam (22) which is inserted into a slide groove (21) of the loading unit (6).
12. Loading unit (6) according to claim 1 or 2, characterized in that the force transmission element (14) has a recess (19) in a side view in the contact area with the shaft (8).
13. Loading unit (6) according to claim 1 or 2, characterized in that the loading unit (6) comprises a holding element (20).
14. Loading unit (6) according to claim 1 or 2, characterized in that the loading unit (6) comprises a resilient holding element (20).
15. Drafting system (1) for a textile machine (10), having at least one roller assembly (2) for pulling a fiber composite (5), wherein the roller assembly (2) has at least one roller (3) and at least one corresponding counter roller (4), between which the fiber composite (5) is clampingly guided, wherein the roller (3) comprises a shaft (8) and the drafting system has at least one loading unit (6) which is configured for applying a pressing force to the shaft (8) and guiding the shaft (8), characterized in that the at least one loading unit (6) is configured in accordance with any one of claims 1 to 14.
16. Drafting system (1) for textile machines (10) according to claim 15, characterized in that the drafting system (1) has at least one pneumatic loading unit and at least one spring loaded loading unit.
17. Textile machine (10) having at least one drawing system (1) for drawing at least one fiber composite (5), characterized in that the drawing system (1) is configured according to any one of claims 15 or 16.
18. The textile machine (10) according to claim 17, characterized in that the textile machine is a drawing frame, a ring spinning machine or an air spinning machine.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019131861.0 | 2019-11-25 | ||
| DE102019131861.0A DE102019131861A1 (en) | 2019-11-25 | 2019-11-25 | Drafting system and textile machine |
| PCT/IB2020/060838 WO2021105820A1 (en) | 2019-11-25 | 2020-11-18 | Loading unit for a drafting system and drafting system for a textile machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114945714A CN114945714A (en) | 2022-08-26 |
| CN114945714B true CN114945714B (en) | 2024-05-07 |
Family
ID=73598922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080094140.3A Active CN114945714B (en) | 2019-11-25 | 2020-11-18 | Loading unit for a drafting system and drafting system for a textile machine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4065756A1 (en) |
| CN (1) | CN114945714B (en) |
| DE (1) | DE102019131861A1 (en) |
| WO (1) | WO2021105820A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH719128A1 (en) * | 2021-11-09 | 2023-05-15 | Saurer Intelligent Technology AG | Drafting system for a textile machine. |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3225392A (en) * | 1961-05-13 | 1965-12-28 | Skf Kugellagerfabriken Gmbh | Drawing mechanism for a spinning machine |
| EP0143291A1 (en) * | 1983-10-28 | 1985-06-05 | Maschinenfabrik Rieter Ag | Drawing frame for spinning machines |
| CN1113525A (en) * | 1993-10-21 | 1995-12-20 | Skf纺织机械备件有限公司 | Upper roller frame of fine yarn stretching apparatus |
| CN2441821Y (en) * | 2000-09-26 | 2001-08-08 | 西安飞机工业上海公司 | Direct air cell pressure and air locking pendulum arm of spinning machinery |
| CN2551663Y (en) * | 2002-06-20 | 2003-05-21 | 西安飞机工业上海公司 | Pressing and holding device for direct pneumatic pressing cradle |
| CN2740629Y (en) * | 2004-09-10 | 2005-11-16 | 西安飞机工业上海公司 | Directly pneumatic pressurized cradle with single-point control |
| CN101063239A (en) * | 2006-04-24 | 2007-10-31 | 里特机械公司 | Loading equipment for loading the bracket of drafting arrangement |
| CN101372778A (en) * | 2007-08-21 | 2009-02-25 | 特鲁菲舍尔股份有限公司及两合公司 | Device on a draw frame having a drafting system for textile fibre slivers |
| CN102112668A (en) * | 2008-07-31 | 2011-06-29 | 里特机械公司 | Pressing device for calender rollers |
| CN104120518A (en) * | 2014-07-16 | 2014-10-29 | 赵梅梅 | Pressurized rocking frame of ring spinning frame drafting system |
| CN208023150U (en) * | 2018-03-30 | 2018-10-30 | 邱县霞光纺织有限公司 | A kind of azelon spinning spring swing pressure device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1038465B (en) * | 1951-10-26 | 1958-09-04 | Ame Interemin Soc | Loading device for the pressure rollers of stretchers, especially needle bar stretchers |
| DE974221C (en) * | 1952-07-16 | 1960-10-20 | Skf Kugellagerfabriken Gmbh | Upper roller support and load arm for spinning machine drafting systems |
| US3143772A (en) * | 1963-04-08 | 1964-08-11 | Ideal Ind | Textile drafting roll pressure applying means |
| DD115714B1 (en) * | 1974-04-08 | 1989-03-22 | Patzna Rud | UPPER ROLL LOADING AND LOADING ARM FOR SPINNING MACHINE RANGE |
| JPS5915520A (en) * | 1982-07-15 | 1984-01-26 | Toyoda Autom Loom Works Ltd | Roll pressurizing apparatus in drafting mechanism |
| DE19807801A1 (en) * | 1998-02-25 | 1999-08-26 | Rieter Ingolstadt Spinnerei | Load device for the top rollers of drafting systems |
-
2019
- 2019-11-25 DE DE102019131861.0A patent/DE102019131861A1/en active Pending
-
2020
- 2020-11-18 CN CN202080094140.3A patent/CN114945714B/en active Active
- 2020-11-18 WO PCT/IB2020/060838 patent/WO2021105820A1/en unknown
- 2020-11-18 EP EP20815944.2A patent/EP4065756A1/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3225392A (en) * | 1961-05-13 | 1965-12-28 | Skf Kugellagerfabriken Gmbh | Drawing mechanism for a spinning machine |
| EP0143291A1 (en) * | 1983-10-28 | 1985-06-05 | Maschinenfabrik Rieter Ag | Drawing frame for spinning machines |
| CN1113525A (en) * | 1993-10-21 | 1995-12-20 | Skf纺织机械备件有限公司 | Upper roller frame of fine yarn stretching apparatus |
| CN2441821Y (en) * | 2000-09-26 | 2001-08-08 | 西安飞机工业上海公司 | Direct air cell pressure and air locking pendulum arm of spinning machinery |
| CN2551663Y (en) * | 2002-06-20 | 2003-05-21 | 西安飞机工业上海公司 | Pressing and holding device for direct pneumatic pressing cradle |
| CN2740629Y (en) * | 2004-09-10 | 2005-11-16 | 西安飞机工业上海公司 | Directly pneumatic pressurized cradle with single-point control |
| CN101063239A (en) * | 2006-04-24 | 2007-10-31 | 里特机械公司 | Loading equipment for loading the bracket of drafting arrangement |
| CN101372778A (en) * | 2007-08-21 | 2009-02-25 | 特鲁菲舍尔股份有限公司及两合公司 | Device on a draw frame having a drafting system for textile fibre slivers |
| CN102112668A (en) * | 2008-07-31 | 2011-06-29 | 里特机械公司 | Pressing device for calender rollers |
| CN104120518A (en) * | 2014-07-16 | 2014-10-29 | 赵梅梅 | Pressurized rocking frame of ring spinning frame drafting system |
| CN208023150U (en) * | 2018-03-30 | 2018-10-30 | 邱县霞光纺织有限公司 | A kind of azelon spinning spring swing pressure device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019131861A1 (en) | 2021-05-27 |
| EP4065756A1 (en) | 2022-10-05 |
| WO2021105820A1 (en) | 2021-06-03 |
| CN114945714A (en) | 2022-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5361989B2 (en) | Condensing unit for drafting unit of textile machinery | |
| CN114945714B (en) | Loading unit for a drafting system and drafting system for a textile machine | |
| US20110173945A1 (en) | Airjet spinning unit comprising a spindle-shaped component | |
| US4510648A (en) | Weighting device for drafting means | |
| JP6116562B2 (en) | Spinning machine with focusing device | |
| CN106012127B (en) | Compression unit for drafting mechanism of spinning machine | |
| US6073755A (en) | Conveyor tensioning system for a folder apparatus | |
| US5479680A (en) | Sliver drafting apparatus | |
| US7251863B2 (en) | Draw frame for textile fibre slivers having a drawing system with top rollers that can be loaded and relieved of load | |
| GB1565282A (en) | Apparatus for waxing yarn | |
| CN106232885B (en) | Drawing device for spinning machine | |
| US4592114A (en) | Drafting roller arrangement for spinning machines | |
| US3787933A (en) | Apparatus for carrying and loading top-rollers in a drawing machine | |
| US20190194834A1 (en) | Drawing Frame for Drawing a Strand-Like Fiber Assembly and Textile Machine Equipped Therewith | |
| US20140157551A1 (en) | Compaction Device for a Spinning Machine | |
| CN102534888A (en) | Drafting system and loading arm for the same | |
| EP3754063B1 (en) | Fine spinning machine | |
| CN111005096A (en) | Circular comb for combing machine | |
| JP2004514800A (en) | Spinning machinery for condensing sliver | |
| CZ20011458A3 (en) | Thread feeding mechanism with two feeding rollers | |
| WO2009060298A2 (en) | Drafting unit | |
| US4606186A (en) | Auxiliary roller drive for open-end friction spinning machine | |
| US2947039A (en) | Roller mounting for spinning machines | |
| CN111979618B (en) | Compressor unit for a drafting device of a textile machine | |
| CN115704121A (en) | Drafting device and method for loading drafting device and opening drafting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |