Collet chuck for winding machines

Abstract

The invention relates to a chuck chuck plate for a winding machine. The chuck chuck plate accommodates and fixes a winding bobbin and a spool wound onto the winding bobbin, the chuck chuck plate having a protruding hollow cylindrical shaft support and a clamping bushing which is held on the peripheral surface of the shaft support and which has a clamping device on the peripheral surface for fixing the winding bobbin. The clamping bushing is connected to a drive shaft by means of a collar, the drive shaft being rotatably mounted in the shaft support. The clamping bushing has a separation point between an envelope housing part and a protruding housing part of the shaft support. In order to ensure sufficient strength in the case of bending loads, the envelope housing part of the clamping bushing and the collar are designed in one piece, and the separation point of the clamping bushing is arranged in the protruding region of the envelope housing part in such a way that it is spaced apart from the collar.

Description

TECHNICAL FIELD

[0001] The invention relates to a gripper chuck for a winding machine for accommodating and holding a winding bobbin and a bobbin wound on the winding bobbin. BACKGROUND

[0002] Gripper chucks of this type are disclosed, for example, from DE 10 2009 021 647 Al.

[0003] The known gripper chucks are used in winding machines for the parallel winding of a number of yarns to form bobbins. For this purpose, the gripper chucks are arranged protruding on spindle supports which are preferably held movably in a machine frame. The gripper chucks are held on the spindle supports here by means of a shaft bearing. The shaft bearing is designed in a protruding hollow-cylindrical manner to accommodate a drive shaft. The drive shaft passes through the shaft bearing and is connected at a free drive end outside the shaft bearing to a hub sleeve and a clamping bushing. The clamping bushing is designed in multiple parts and has a housing part which surrounds the shaft bearing and a protruding housing part which is opposite the hub sleeve. In order to accommodate a plurality of bobbins, the gripper chucks need to protrude in a correspondingly long manner, so that the drive shaft for attachment to a drive device arranged on the spindle support has to be relatively long. Furthermore, it has been considered to reduce the gripper chucks as the weight of the bobbins increases, which leads to a bending load acting on the gripper chucks. The length of the drive shaft and thus the connection between the clamping bushing and the drive shaft can therefore only be realized to a limited extent with regard to the protruding length for strength considerations. Furthermore, in the known gripper chucks, the clamping bushing and the hub sleeve are designed in multiple parts, so that the protruding length of the latter is also limited due to the bending load. SUMMARY

[0004] It is therefore an object of the invention to improve a winding machine gripper chuck of the type mentioned in the introduction in such a way that a desirably long protrusion of the clamping bushing for a plurality of winding bobbins and bobbins wound on the winding bobbins can be achieved.

[0005] According to the invention, this object is achieved in that the envelope housing part of the clamping bushing and the collar are formed integrally, and the separation point of the clamping bushing is arranged in the protruding region of the envelope housing part in a manner spaced apart from the collar.

[0006] The invention has the particular advantage that the separation point of the clamping bushing is relocated to a region which is not critical with regard to the load acting on the clamping bushing. As a result, the torque can advantageously be transmitted between the drive shaft and the clamping bushing. For this purpose, the envelope housing part of the clamping bushing and the collar are formed integrally and do not contain any weak point caused by the separation point. Furthermore, the length of the clamping bushing is not bound by production-related limitations, since the protruding region of the envelope housing part can be dimensioned in terms of its length in such a way that a precise inner bore can be produced without difficulty in the collar. In this regard, the gripper chuck according to the invention is particularly suitable for achieving large lengths in the range of more than 1800 mm.

[0007] In order to be able to accommodate the winding bobbin and to clamp the winding bobbin, the envelope housing part and the protruding housing part have the same outer diameter for accommodating the clamping device, independently of the separation point. In order to accommodate the clamping device on both parts of the clamping bushing, the same manufacturing tolerances are to be observed here.

[0008] In order to ideally minimize the inertia of the clamping bushing even in the case of a comparatively large protruding length, the following improvement of the application is preferably implemented, wherein the structural wall thickness of the protruding housing part is designed to be at least 60% thinner than the structural wall thickness of the envelope housing part in terms of wall thickness. The torque transmission takes place on the envelope housing part of the clamping bushing, so that the envelope housing part can have the corresponding strength.

[0009] In order to be able to connect the housing parts of the clamping bushing then as well, it is also provided that the protruding housing part has a material thickening in terms of wall thickness in the region of the separation point for forming a joint opening. The joint opening on the protruding housing part can then be used to accommodate the envelope housing part of the clamping bushing.

[0010] The following improvement of the application is particularly advantageous for fixing the clamping device on the circumference of the clamping bushing, wherein the protruding housing part has a further material thickening at the free end for accommodating a cover.

[0011] In order to absorb bending loads, the following improvement of the application proves to be particularly successful, wherein the envelope housing part of the clamping bushing and the protruding housing part of the clamping bushing are connected to each other by a thread at the separation point. This advantageously allows centering to be carried out during assembly and bending loads to be absorbed at the separation point. If desired, the protruding housing part of the clamping bushing can even be designed to be interchangeable.

[0012] In order to form the threaded connection, the envelope housing part has an external thread at the diameter step and the protruding housing part has an internal thread at the joint opening. Direct screwing of the two housing parts is allowed here.

[0013] In order to avoid loosening of the separation point, the thread at the separation point can also be fixed by means of an adhesive. A solid and durable connection between the two housing parts of the clamping bushing is thus ensured.

[0014] But alternatively, the envelope housing part of the clamping bushing and the protruding housing part of the clamping bushing can also be connected at the separation point by means of a shrink-fit. The corresponding length of the joint can also be configured here at the end of the housing parts.

[0015] The chuck chuck according to the application thus allows a protrusion length which has not been possible hitherto. Even the shaft-hub connection between the drive shaft and the chuck bushing does not have to be in the center of gravity of the chuck chuck as before. Slight misalignments of the chuck chuck caused by the weight of the package are thus not critical. BRIEF DESCRIPTION OF DRAWINGS

[0016] The application will be explained in more detail below with reference to the drawings and by means of an embodiment of a winding machine chuck chuck according to the application, in which:

[0017] Figure 1 a longitudinal sectional view of an embodiment of a chuck chuck according to the application is schematically shown;

[0018] Figure 2.1 and Figure 2.2 a cross-sectional view of a separation point in a chuck bushing of an embodiment of Figure 1 is schematically shown; and

[0019] Figure 3 a cross-sectional view of a separation point in a chuck bushing of an embodiment of Figure 1 is schematically shown. DETAILED DESCRIPTION

[0020] A longitudinal sectional view of an embodiment of a winding machine chuck chuck is schematically shown in Figure 1 . The chuck chuck is held on a spool support 2 by means of a shaft support 1. The shaft support 1 is designed as a hollow cylinder and protrudes from the spool support 2. The shaft support 1 is penetrated by a drive shaft 3. The drive shaft 3 is connected to a drive device, not shown here, on the spool support 2. To this end, the drive shaft 3 is composed in two parts in this embodiment and has a connector 4 in the region of the spool support 2.

[0021] The drive shaft 3 within the shaft support 1 is rotatably mounted in a bearing sleeve 6 by means of two bearings 5. The bearing sleeve 6 is supported on the shaft support 1 by means of a plurality of rubber dampers 7.

[0022] The drive shaft 3 at the drive end protruding from the shaft support 1 is connected to a chuck bushing 9 by means of a shaft-hub connection 8. The chuck bushing 9 is designed in two parts and has an envelope housing part 9.1 and a protruding housing part 9.2. The housing parts 9.1 and 9.2 are connected to one another at a separation point 10 in such a way that they are spaced apart from the shaft-hub connection 8. Embodiments of the separation point 10 will be explained in more detail below.

[0023] The envelope housing part 9.1 is realized in one piece with the collar 9.3. The envelope housing part 9.1 and the protruding housing part 9.2 of the clamping bush 9 have the same realization with regard to their outer diameter and support the clamping device 13. The clamping device 13 is held in a clamping sleeve 14, which has a plurality of openings for the clamping element exit. The clamping device 13 is held at the end of the clamping bush 9 by a cover 12. At the opposite end of the clamping bush 9, the clamping device 13 is supported on a clamping bush collar 20.

[0024] For accommodating the cover 12, the protruding housing part 9.2 has a material thickening 11 with regard to the wall thickness. The wall thickness of the protruding housing part 9.2 is realized here to be significantly smaller than the wall of the envelope housing part 9.1 of the clamping bush 9. The protruding housing part 9.2 preferably has a structural wall thickness which is at least 60% smaller than the structural wall thickness of the envelope housing part 9.1.

[0025] The protruding housing part 9.2 has a further material thickening 11 with regard to the wall thickness in the region of the separation point 10, so that a joint opening is formed. For this purpose, a partial view of the joint end of the envelope housing part 9.1 and of the protruding housing part 9.2 is shown schematically in the cross-sectional view Figure 2.1 and Figure 2.2 . Figure 2.1 Here, the state of the two housing parts 9.1, 9.2 before joining is shown, Figure 2.2 the two housing parts 9.1, 9.2 connected at the separation point 10.

[0026] The following description applies to both figures, unless explicitly mentioned otherwise with regard to one of the figures.

[0027] The joint opening 15 at the joint end of the protruding housing part 9.2 is formed by the material thickening 11. The joint opening 15 has an internal thread 16.

[0028] The opposite joint end of the envelope housing part 9.1 has a diameter step 17, at the peripheral surface of which an external thread 18 is arranged.

[0029] For connecting the housing parts 9.1 and 9.2 of the clamping bush 9, the protruding housing part 9.2 is screwed onto the external thread 18 by means of the internal thread 16. Before this, an adhesive can also be applied to the internal thread 16 on the joint end of the envelope housing part 9.1. A reliable screw connection at the separation point 10 can thus be established. Figure 2.2 This is shown.

[0030] In the embodiment of the chuck platen of the application shown in Figure 1 , the separation point 10 is arranged in the protruding region of the envelope housing part 9.1. The protruding length of the envelope housing part 9.1 from the collar 9.3 to the separation point 10 is designated by the reference L Figure 1 in the cross-sectional view in aThe reference numerals are used for illustrative purposes. The total length of the enclosing housing portion 9.1, indicated by reference numeral L1, and the total length of the protruding housing portion 9.2, indicated by reference numeral L2, are also included. The total length of the clamping bushing 9 is thus obtained by adding the lengths L1 and L2. To obtain an ideally long protruding chuck with a length of approximately 2000 mm, the enclosing housing portion 9.1 is preferably made to have a length that is three times that of the protruding housing portion 9.2. Therefore, length L1 is more than three times the length L2.

[0031] The protrusion length L of the envelope housing portion 9.1 a The shaft-shroud connection 8 is preferably designed to be machined to the required dimensional tolerances without special tools. The clamping bushing 9.3 is preferably not located at the center of gravity of the chuck.

[0032] Figure 1 and Figure 2.2 The connection of the housing portions 9.1 and 9.2 of the clamping bushing 9 shown is exemplary in terms of its implementation. In principle, alternative connection techniques can also be used to connect the housing portions 9.1 and 9.2 of the clamping bushing 9 by means of their wall thickness. Thus, simple bonding or alternative geothermal sleeve fitting can also be used.

[0033] to this end, Figure 3 An embodiment of separation point 10 is shown, as can be, for example, according to Figure 1 As implemented in the embodiments. Figure 3 The mating ends of housing portions 9.1 and 9.2 have inclined mating surfaces, which are disposed at the joint opening 15 of the protruding housing portion 9.2 and the diameter step 17 of the enclosing housing portion 9.1. In this respect, the two housing portions 9.1 and 9.2 are joined by a thermal fit 19. In this respect, the protruding housing portion 9.2 is heated before joining.

[0034] The winding machine chuck according to the invention allows for the accommodation of multiple winding spools for winding. Parallel lowering of the clamping bushings and inclined clamping bushings can be achieved to accommodate fully wound spools. The multi-piece configuration of the clamping bushings significantly facilitates production.

Claims

1. A chuck for a winding machine, the chuck for receiving and securing a winding bobbin and a cylinder wound onto the winding bobbin, the chuck having a clamping bushing (9) and a protruding hollow cylindrical shaft support (1), the clamping bushing (9) being held on the circumferential surface of the shaft support (1) and having a clamping device (13) for securing the winding bobbin on the circumferential surface, and the chuck further having a drive shaft (3) mounted within the shaft support (1) and fixedly connected to the clamping bushing (9) by means of a protruding end via a clamp (9.3), wherein, The clamping bushing (9) has a separation point (10) between the protruding housing portion (9.2) and the enclosing housing portion (9.1) that encloses the shaft support (1), characterized in that the enclosing housing portion (9.1) and the hoop (9.3) of the clamping bushing (9) are integrally designed, and the separation point (10) of the clamping bushing (9) is arranged in the protruding area of ​​the enclosing housing portion (9.1) in a manner spaced apart from the hoop (9.3).

2. The chuck and chuck according to claim 1, characterized in that, The enveloping housing portion (9.1) and the protruding housing portion (9.2) of the clamping bushing (9) have the same outer diameter to accommodate the clamping device (13).

3. The chuck and chuck according to claim 1, characterized in that, The structural wall thickness of the protruding housing portion (9.2) is designed to be at least 60% thinner than that of the enclosing housing portion (9.1).

4. The chuck and chuck according to claim 3, characterized in that, The protruding housing portion (9.2) has a material thickening portion (11) in terms of wall thickness in the region of the separation point (10) for forming a joint opening (15).

5. The chuck and chuck according to claim 3 or 4, characterized in that, The protruding housing portion (9.2) has another material thickening portion (11) at its free end for receiving the cover (12).

6. The chuck and chuck according to claim 1, characterized in that, The enveloping housing portion (9.1) and the protruding housing portion (9.2) of the clamping bushing (9) are connected to each other at the separation point (10) by threads (16, 18).

7. The chuck and collet according to claim 6, characterized in that, The protruding housing portion (9.2) has a material thickening portion (11) in terms of wall thickness in the region of the separation point (10) for forming a joint opening (15), the enveloping housing portion (9.1) has an external thread (18) at a diameter step (17), and the protruding housing portion (9.2) has an internal thread (16) at the joint opening (15).

8. The chuck and chuck according to claim 6 or 7, characterized in that, The threads (16, 18) are secured at the separation point (10) by adhesive.

9. The chuck and collet according to any one of claims 1 to 3, characterized in that, The enveloping housing portion (9.1) and the protruding housing portion (9.2) of the clamping bushing (9) are connected to each other at the separation point (10) by a heat-fitting (19).

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