EP3498895A1 - Open ended spinning machine and opening roller for an open ended spinning machine - Google Patents

Abstract

The invention relates to an opening roller (1) for an open-end spinning device with a drive shaft (2) and with a roller body (3) connected to the drive shaft (2). The drive shaft (2) can be connected by means of a coupling device (4) to an output shaft (5) of a drive, wherein the drive shaft (2) has a coupling element (7), which in turn has a form-locking element (8). Moreover, the invention relates to an open-end spinning device, which comprises an opening roller (1) with a drive shaft (2) and a roller body (3) connected to the drive shaft (2) and a drive for the opening roller (1) with an output shaft (5). having. The drive shaft (2) of the opening roller (1) and the output shaft (5) of the drive (6) are interconnected by means of a coupling device (4), wherein the drive shaft (2) of the opening roller (1) has a coupling element (7) and wherein the output shaft (5) of the drive has a coupling piece (11). The coupling element (7) of the drive shaft (2) and the coupling piece (11) of the output shaft (5) each have a form-locking element (8), by means of which they engage positively in one another.

Description

The present invention relates to an opening roller for an open-end spinning device with a drive shaft and with a connected to the drive shaft roller body, wherein the drive shaft has a coupling element for connection to an output shaft of a drive, in particular a single electric drive.

Furthermore, the invention relates to an open-end spinning device comprising an opening roller with a drive shaft and a connected to the drive shaft roller body, and a drive, in particular an electric single drive, for the opening roller with an output shaft, wherein the drive shaft of the opening roller and the output shaft of the drive means a coupling device are connected to each other, wherein the drive shaft of the opening roller has a coupling element and wherein the output shaft of the drive has a coupling piece.

The object of an opening roller in an open-end spinning machine is the dissolution of the fiber sliver supplied to the machine as a starting material into individual fibers, from which subsequently a yarn is spun. For this purpose, the sliver is guided over the teeth-reinforced set on the surface of the rotating opening roller. Due to friction at the relatively high speed of the components of the opening rollers are exposed to high stress or high wear and must be replaced or maintained at regular intervals. Likewise, when processing another source material, it is often necessary to replace the opening roller with an opening roller suitable for that material. A modern spinning machine usually has a variety of spinning devices that have been commonly driven in the past. In the course of development from each other to the largest Part of independent spinning devices, the components, including the opening rollers, were equipped with group or individual drives. In individual drives, the opening rollers were frequently fastened together with their drive motor in the open-end spinning device for constructional reasons and also for reasons of space, and therefore could only be removed together to replace the opening roller. Since this requires the drive motor to be electrically disconnected, this is correspondingly expensive.

For maintenance of such an opening roller or the associated drive describes the DE 10 2016 102 151 A1 an opening roller, which can be removed from the spinning device together with the rotor of their individual drive. The stator of the single drive, however, remains in the spinning device. To be able to simply remove the rotor from the stator, special drives are required. In addition, there is the risk of damage to the rotor, which usually has a longer life than the opening roller.

The DE 43 09 947 A1 describes for this purpose a flange connection between the motor shaft and the drive shaft of the opening roller. The disadvantages here are a large space requirement of the flange and in the case of maintenance consuming separation of the connection by loosening the screws with the appropriate tool.

The object of the present invention is therefore to simplify the independent maintenance of opening rollers in open-end spinning devices.

The object is achieved by an opening roller and an open-end spinning device with the features of the independent claims.

The proposed opening roller for an open-end spinning device has a drive shaft and a roller body connected thereto, wherein the Drive shaft has a coupling element for connection to an output shaft of a drive. According to the invention, it is provided that the coupling element has a form-locking element.

On the assumption of an analogous design of a coupling piece on the output shaft of the drive, the proposed opening roller is connected by a positive connection, preferably a plug-in connection with the drive. By in this case positive torque transmission slip between drive and opening roller is avoided. In the case of maintenance, the connection can be solved quickly and without the use of tools, which significantly reduces the expense of removing the opening roller. In addition, the independent maintenance of drive and opening roller is possible. In particular, when using a single electric drive, this is advantageous. However, the coupling piece or the coupling device is also advantageous in other types of drives, including group or central drives, since each opening roller can be removed individually.

It is particularly advantageous if the positive-locking element has at least one, preferably flat, coupling surface oriented in the axial direction of the drive shaft, wherein preferably the positive-locking element has a single-edged or polygonal profile. Such profiles can transmit large torques, in addition, they are widely used in positive-locking elements. This can be used in the production of the positive-locking element on established manufacturing process. An example of this would be a hexagonal profile, which is widely used in screw heads, for example. According to another advantageous embodiment of the invention, the positive-locking element includes a multi-tooth profile. This is particularly well suited for the transmission of larger torques.

Alternatively, one or more of the rotational axis with respect to eccentric bores or corresponding ones would be for the positive-locking element Cones conceivable. Also possible would be an example elliptical profile. The coupling surface of the positive-locking element would be curved in this case.

Moreover, it is advantageous if the drive shaft of the opening roller is firmly connected to a bearing unit for supporting the drive shaft in the open-end spinning device. A firm connection of these two components, d. H. a compound that is not solvable without tools, allows a structurally simpler, and thus more cost-effective, design of the storage unit. Thus, with a fixed connection of the components no additional guidance in the bearing unit is necessary or can be dispensed with a bearing inner ring, since the rolling elements can run directly on the drive shaft. In addition, the bearing unit has a similar maintenance interval as other components of the roll body. The additional design effort to ensure easy separability of the two components would thus have only limited added value.

It is advantageous if the bearing unit has a securing groove for a securing element of the open-end spinning device, in particular for the axial securing of the bearing unit.

Furthermore, it is advantageous if the coupling surface of the positive-locking element is surface-finished. In this way, a wear and / or corrosion protection can be achieved, which has an advantageous effect on the life of the coupling device. In particular fretting corrosion, which occurs on coupling surfaces mechanically stressed components, both of which is metallic and at least one iron-containing, is thus prevented. An example of an advantageous surface refinement is the hard chrome plating, wherein a chromium layer of more than 1 micron thickness is applied to the surface. Other or additional forms of surface finishing, such as galvanizing and nickel plating, would also be conceivable.

It is additionally advantageous if the coupling element is a component formed separately from the drive shaft. In particular, a receiving bush inserted into one end of the shaft is advantageous. For example, a receiving socket could be glued, screwed or clamped as a coupling element in an introduced into the end of the shaft, axially extending wellbore. If the bush is screwed, then the thread is provided in opposite directions to the direction of rotation of the opening roller. However, in particular with a simple shaping of the positive-locking element, it is also possible to form the positive-locking element in one piece with the drive shaft.

Furthermore, it is advantageous if the separately formed coupling element is replaceable independently of the drive shaft. This makes it possible to decouple the maintenance or replacement of the coupling element, which is exposed to greater wear, from the rest of the opening roller and thereby save costs.

In addition, it is advantageous if the separately formed coupling element consists of a material which differs from the material of the drive shaft. The requirements for the material properties for the coupling element may differ from those of the drive shaft. Usually, the drive shaft of an opening roller made of steel. The coupling element could consist of inexpensive plastic or a ceramic. As a result, for example, the formation of fretting corrosion on the coupling surfaces of the coupling device is avoided. Also bearing metals such as brass or bearing bronze can be used.

The still-proposed open-end spinning device has an opening roller with a drive shaft and a roller body connected to the drive shaft, and a drive for the opening roller with an output shaft, wherein the drive shaft of the opening roller and the output shaft of the drive, in particular a single drive, by means of a Coupling device are interconnected. The drive shaft of the opening roller in turn has a coupling element and the output shaft of the drive has a coupling piece. The coupling element and the coupling piece each form a part of the coupling device, by means of which the drive shaft can be connected to the output shaft of the drive.

According to the invention it is provided that the coupling element of the drive shaft and the coupling piece of the output shaft each have a positive locking element, by means of which they engage in a form-fitting manner in the circumferential direction of the opening roller.

The maintenance of the opening roller and its drive in the open-end spinning device is greatly facilitated by the coupling device, which is preferably designed as a positive plug connection. A tool-free and time-efficient separation and connection of the coupling device is possible. Instead of a pure plug connection, however, a connection would also be possible which is at least partially designed as a rotary closure, for example a bayonet closure. In this way, in addition to the torque transmission and an axial cohesion of the coupling device can be achieved.

It is advantageous to form the opening roller according to the preceding description, wherein said features may be present individually or in any combination. The advantages already mentioned in this case apply correspondingly to the open-end spinning device.

For the open-end spinning device, it is also advantageous if the output shaft of the drive and the drive shaft of the opening roller have a common axis of rotation. This allows easy storage of the waves and allows a space perpendicular to the common axis of rotation construction. Alternatively, the coupling device could also consist of gears or gear and worm. This would, for example, a vertical arrangement of the axes of rotation of output and drive shaft to each other conceivable.

For the maintenance of the open-end spinning device, it is also advantageous if the coupling device is releasable without tools. This increases the efficiency of a maintenance operation of the opening roller and / or the drive.

According to a further embodiment of the open-end spinning device, it is advantageous if the coupling piece of the output shaft is a component formed separately from the output shaft. Preferably, the separate component is a mounted on one end of the output shaft attachment piece. The attachment can be easily replaced when worn without the associated single drive would have to be replaced with. In addition, conventional motors can be used for the single drive. The production of the coupling piece of the output shaft is also facilitated by the production as a separate attachment piece.

It is also advantageous in the case of the open-end spinning device if the coupling piece of the output shaft, in particular the attachment piece, has an insertion bevel. This facilitates the assembly of the coupling device in particular, if this is designed as a plug connection.

It is also conceivable, however, that in addition to or as an alternative to the insertion bevel of the coupling piece of the output shaft, the coupling element of the opening roller has an insertion bevel.

According to an advantageous embodiment of the open-end spinning device, the drive shaft of the opening roller is mounted by means of a bearing unit in the open-end spinning device. Depending on the length ratio of the output and drive shafts is a bearing of the drive shaft for mechanical stability the spinning device advantageous. With a long driven and short drive shaft, the bearing of the output shaft by means of the bearing unit would alternatively be possible. In this case, the storage unit could remain together with the drive in the spinning device when the opening roller is removed with its drive shaft.

It is additionally advantageous for the open-end spinning device if the bearing unit together with the drive shaft and roller body can be separated from the output shaft by means of the coupling device and can be removed from the open-end spinning device. This is especially advantageous when the bearing unit is firmly connected to the drive shaft. In addition, the bearing unit can be replaced or serviced independently of the drive.

It is advantageous if the open-end spinning device has an axial securing element for the bearing unit. For example, the securing element may be formed as a wire spring and engage positively in a securing groove of the bearing unit. For this purpose, the wire spring can be arranged to be pivotable and tensionable in the open-end spinning device.

A further advantage for the open-end spinning device is when at least one further coupling device is formed between the drive and the opening roller. For example, it is possible to maintain the storage unit independently of the drive and independently of the opening roller.

Figur 1a

eine Auflösewalze, die durch eine Kupplungsvorrichtung mit der Abtriebswelle eines Antriebs verbunden ist, in einer Schnittdarstellung,

Figur 1b

die vorherige Auflösewalze mit getrennter Verbindung in Schnittdarstellung,

Figur 1c

eine Draufsicht auf das Ende der Antriebswelle der vorherigen Auflösewalze,

Figur 2

eine Auflösewalze mit kurzer Antriebswelle, wobei die Lagereinheit an der Abtriebswelle eines Einzelantriebs angeordnet ist, in einer Schnittdarstellung,

Figur 3

ein System aus Auflösewalze, Einzelantrieb und Lagereinheit mit zwei separaten Kupplungsvorrichtungen in Schnittdarstellung,

Figur 4

eine Ausführung einer Kupplungsvorrichtung mit einer Aufnahmebuchse in vergrößerter, abgebrochen dargestellter Schnittdarstellung, sowie

Figur 5

eine alternative Ausführung eines Kupplungsstücks einer Abtriebswelle mit einem Aufsatzstück in vergrößerter, abgebrochen und teilweise geschnittener Darstellung.

Further advantages of the invention are described in the following exemplary embodiments. It shows:

FIG. 1a

an opening roller, which is connected by a coupling device with the output shaft of a drive, in a sectional view,

FIG. 1b

the previous opening roller with separate connection in sectional view,

Figure 1c

a plan view of the end of the drive shaft of the previous opening roller,

FIG. 2

an opening roller with a short drive shaft, wherein the bearing unit is arranged on the output shaft of a single drive, in a sectional view,

FIG. 3

a system of opening roller, single drive and storage unit with two separate coupling devices in a sectional view,

FIG. 4

an embodiment of a coupling device with a receiving socket in an enlarged, broken sectional view shown, as well as

FIG. 5

an alternative embodiment of a coupling piece of an output shaft with an attachment piece in an enlarged, broken and partially cut representation.

In the following description of the figures, the same reference numerals are used for each identical and / or at least comparable features in the various figures. The individual features, their design and / or mode of action are usually explained in detail only at their first mention. If individual features are not explained again in detail, their design and / or mode of action corresponds to the design and mode of action of the features already described.

As in FIG. 1a is shown, an opening roller 1, which consists of a drive shaft 2 and a roller body 3, connected via a coupling device 4 with an output shaft 5 of a drive, which is designed here as a single electric drive 6. Drive shaft 2 and output shaft 5 have a common axis of rotation 13. The coupling device 4 is on the side of the opening roller 1 of a coupling element 7 and on the side of the single drive 6 from a coupling piece 11 (s. Fig, 1b ). The drive shaft 2 of the opening roller 1 is supported by means of a bearing unit 9 in a pivotable cover member 14 of the open-end spinning device, not shown here. The bearing unit 9 is fixedly connected to the drive shaft 2 of the opening roller 1. If the opening roller 1 is to be replaced or maintained, it can be removed together with the bearing unit 9 by releasing the coupling device 4 from the open-end spinning device or the cover element 14. The lid member 14 has for this purpose a receiving bore for the bearing unit 9, in which the bearing unit 9 can be easily inserted. By means of a securing element 17 of the open-end spinning device such as a wire spring, a bracket, a grub screw or the like. The bearing unit 9 can be fixed in operation in the cover member 14, in particular in the axial direction. In the present case, the securing element 17 is designed as a wire spring, which cooperates with a securing groove 18 of the bearing unit 9.

Like now in FIG. 1b that have the same components as FIG. 1a shown with separate coupling device 4, the coupling piece 11 and the coupling element 7 each have a positive locking element 8, so that the coupling device 4 is a positive connection. In this embodiment, the positive locking element 8 is formed on the coupling element 7 and the coupling piece 11 as a half-cylinder, as well as the Fig. 1c removable. Both each have a coupling surface 12 for torque transmission, which is oriented in the direction of the axis of rotation 13 of the drive shaft 2.

Fig. 1c shows a plan view of the end of the drive shaft 2. The drive shaft is presently provided at its end with a bore into which the form-locking element 8 is inserted as a semi-cylindrical insert and fastened, for example, glued or soldered. The connector by means of the coupling device 4 of this embodiment allows a positive and thus slipless torque transmission during operation of the opening roller 1 and a tool-free and thus time-saving separation of individual drive 6 and the unit of storage unit 9 and opening roller 1 in case of maintenance.

FIG. 2 shows an opening roller 1 with a short drive shaft 2. The bearing unit 9 is connected in this case with the output shaft 5 of the single drive 6. It is thus possible to separate the opening roller 1 in a simple manner from the individual drive 6 and the storage unit 9 and to exchange or maintain this independently. In this embodiment, the positive locking element 8 is formed on the coupling element 7 as Innensechskant- and the coupling piece 11 as Außensechskantprofil, so that they each have a plurality of coupling surfaces 12. For reasons of clarity, only one of the coupling surfaces 12 is designated in each case.

It is understood that each of the various mentioned embodiments of the coupling device 4 or each of the different embodiments of the form-fitting element 8 could alternatively be used in each of the embodiments.

In FIG. 3 an embodiment with two coupling devices 4 along the common axis of rotation 13 of the output shaft 5 and drive shaft 2 is shown. The bearing unit 9 is located between the two coupling devices 4. By positive connections so the opening roller 1, the bearing unit 9 and possibly also screwed in the open-end spinning device not shown here single drive 6 are each independently exchanged or maintained.

FIG. 4 shows the coupling device 4 between the output shaft 5 and drive shaft 2 as a combination of the coupling piece 11 and a separate receiving socket 10 as a coupling element. The receiving socket 10 is glued into a bore in the drive shaft 2 and constitutes an independent component. The material of the receiving socket 10 can thus be adapted to the requirements. There are in particular metals and their alloys, plastics and ceramics in question. When using plastics or ceramics, the occurrence of frictional corrosion on the coupling surfaces 12 of coupling piece 11 and receiving socket 10 can be avoided. The receiving socket 10 can be replaced as a wear part independently of the drive shaft 2. Depending on the load, it may be advantageous in this regard to provide the receiving bush 10 and the drive shaft 2 each with a thread and to connect both components by a screw connection.

FIG. 5 shows still another advantageous embodiment of a coupling piece 11 of an output shaft 5, in which the coupling piece 11 is designed as a top piece 15. The attachment 15 is shown here in a sectional view. The coupling piece 11 has a form-locking element 8 present a multi-tooth profile, other profiles, especially single or polygonal profiles, but of course also conceivable. The attachment piece 15 in the present case has an insertion bevel 16, which facilitates the coupling of the coupling device 4. It is understood that alternatively or additionally, such an insertion bevel 16 can also be provided on the coupling element 7 of the drive shaft 2 of the opening roller 1 and, of course, also advantageous in connection with form-fitting elements 8 formed directly on the input or output shafts 2, 5.

The present invention is not limited to the illustrated and described embodiments. Variations within the scope of the claims are possible as well as a combination of features, too if these are shown and described in different embodiments.

LIST OF REFERENCE NUMBERS

1

opening roller

2

drive shaft

3

roller body

4

coupling device

5

output shaft

6

individual drive

7

coupling member

8th

Form-fitting element

9

storage unit

10

receiving socket

11

coupling

12

coupling surface

13

axis of rotation

14

cover element

15

top section

16

chamfer

17

fuse element

18

securing groove

Claims (17)

An opening roller (1) for an open-end spinning device having a drive shaft (2) and a roller body (3) connected to the drive shaft (2), the drive shaft (2) having a coupling element (7) for connection to an output shaft (5) of a Drive, in particular an electric single drive (6), characterized in that the coupling element (7) has a form-locking element (8). Opening roller (1) according to the preceding claim, characterized in that the positive-locking element (8) has at least one coupling surface (12) oriented in the axial direction of the drive shaft (2), wherein preferably the positive-locking element (8) is a single-edged or polygonal profile or a multi-tooth profile includes. Opening roller (1) according to one of the preceding claims, characterized in that the drive shaft (2) with a bearing unit (9) for supporting the drive shaft (2) in the open-end spinning device is firmly connected, wherein preferably the bearing unit (9) has a securing groove (18) for a securing element (17). Opening roller (1) according to one of the preceding claims, characterized in that the at least one coupling surface (12) of the positive-locking element (8) has a surface finish. Opening roller (1) according to one of the preceding claims, characterized in that the coupling element (7) is a component formed separately from the drive shaft (2), in particular a receiving bush (10) inserted into one end of the drive shaft (2). Opening roller (1) according to one of the preceding claims, characterized in that the coupling element (7) is exchangeable independently of the drive shaft (2). Opening roller (1) according to one of the preceding claims, characterized in that the coupling element (7) and the drive shaft (2) are formed from different materials. Open-end spinning device comprising an opening roller (1) with a drive shaft (2) and a roller body (3) connected to the drive shaft (2), and a drive, in particular an electric single drive (6) for the opening roller (1) with a Output shaft (5), wherein the drive shaft (2) of the opening roller (1) and the output shaft (5) of the drive by means of a coupling device (4) are interconnected, wherein the drive shaft (2) of the opening roller (1) has a coupling element (7) and wherein the output shaft (5) of the drive has a coupling piece (11), characterized in that the coupling element (7) of the drive shaft (2) and the coupling piece (11) of the output shaft (5) each have a form-locking element (8), by means of which they engage in a form-fitting manner in the circumferential direction of the opening roller (1). Open-end spinning device according to the preceding claim, characterized in that the drive is designed as an individual electric drive (6) and is arranged stationarily in the open-end spinning device, in particular in a pivotable cover element of the open-end spinning device. Open-end spinning device according to one of the preceding claims, characterized in that the output shaft (5) of the drive and the drive shaft (2) of the opening roller (1) have a common axis of rotation (13). Open-end spinning device according to one of the preceding claims, characterized in that the coupling device (4) is detachable without tools and preferably designed as a plug connection. Open-end spinning device according to one of the preceding claims, characterized in that the coupling piece (11) of the output shaft (5) is a separately formed from the output shaft (5) component, in particular an attached to one end of the output shaft (5) attachment piece (15), wherein preferably the attachment piece (15) has an insertion bevel (16). Open-end spinning device according to one of the preceding claims, characterized in that the drive shaft (2) by means of a bearing unit (9) is mounted in the open-end spinning device. Open-end spinning device according to one of the preceding claims, characterized in that the bearing unit (9) together with the drive shaft (2) and the roller body (3) by means of the coupling device (4) of the output shaft (5) separable and removable from the open-end spinning device is. Open-end spinning device according to one of the preceding claims, characterized in that the open-end spinning device has a securing element (17) for the bearing unit (9). Open-end spinning device according to one of the preceding claims, characterized in that the opening roller (1) according to one of claims 2 to 7 is formed. Open-end spinning device according to one of the preceding claims, characterized in that at least one further coupling device (4) between the drive, in particular the single drive (6), and the opening roller (1) is formed.

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