FRICTION DISC, RACE, USE OF A RACE, FALSE TWISTING DEVICE, USE OF A FRICTION DISC AND METHOD FOR CHANGING A RACE OF A FRICTION DISC

Abstract

The invention relates to a friction disc (5) for a false twisting device (1), having a hub (6) comprising a mounting opening (7) for mounting a shaft (4) of the false twisting device (1), and with a race (8) that circumferentially surrounds the hub (6) when the friction disc (5) is used as intended, wherein the race (8) comprises a base body (9) having a uniform cross section about an axis of rotation (RA) of the friction disc (5) and the hub (6) comprises a mounting contour (10) adapted to correspond to the base body (9) of the race (8), and wherein the race (8) and the hub (6) are detachably connected to one another. According to the invention, the race (8) comprises at least one locking section (11) that increases the cross-section of the base body (9) and is delimited along a direction of rotation (DR) of the friction disc (5), and the hub (6) comprises at least one correspondingly adapted recess (12), wherein the locking section (11) of the race (8) and the recess (12) of the hub (6) form an interlocking anti-rotation lock when the friction disc (5) is in the connected state. The invention further comprises a race (8), a use of a race (8), a false twisting device (1), a use of a friction disc (5), and a method for changing a race (8) of a friction disc (5).

Claims

1. A friction disc (5) for a false twisting device (1), having a hub (6) comprising a mounting opening (7) for mounting a shaft (4) of the false twisting device (1), and with a race (8) that circumferentially surrounds the hub (6) when the friction disc (5) is used as intended, wherein the race (8) comprises a base body (9) having a uniform cross section about an axis of rotation (RA) of the friction disc (5) and the hub (6) comprises a mounting contour (10) adapted to correspond to the base body (9) of the race (8), and wherein the race (8) and the hub (6) are detachably connected to one another, characterized in that the race (8) has at least one locking section (11) that increases the cross-section of the base body (9) and that is delimited along a direction of rotation (DR) of the friction disc (5), and in that the hub (6) comprises at least one correspondingly adapted recess (12), wherein the locking section (11) of the race (8) and the recess (12) of the hub (6) form an interlocking anti-rotation lock in the connected state of the friction disc (5).

2. The friction disc (5) according to claim 1, characterized in that the race (8) is formed integrally with the base body (9) and the at least one locking section (11).

3. The friction disc (5) according to claim 1, characterized in that the at least one locking section (11) projects from the base body (9) of the race (8) along an axial direction (AR).

4. The friction disc (5) according to claim 1, characterized in that the race (8) is formed mirror-symmetrically, wherein the at least one locking section (11) is preferably formed as a projection projecting axially on both sides from the base body (9).

5. The friction disc (5) according to claim 1, characterized in that the race (8) comprises at least two, preferably at least four, locking sections (11), wherein two locking sections (11) are separated from each other by a respective gap section (13).

6. The friction disc (5) according to claim 5, characterized in that the at least two locking sections (11) and the at least one gap section (13) are evenly distributed along the direction of rotation (DR) and/or in that at least one of the locking sections (11) transitions abruptly into the gap section (13).

7. The friction disc (5) according to claim 1, characterized in that the hub (6) comprises at least two carriers (14a, 14b), wherein the two carriers (14a, 14b) about each other when the friction disc (5) is used as intended and are detachably connected to the race (8).

8. The friction disc (5) according to claim 7, characterized in that one of the two carriers (14a, 14b) comprises a mounting ring (15) with the mounting opening (7), the mounting ring (15) extending completely over a width (B) of the hub (6) in axial direction (AR).

9. The friction disc (5) according to claim 7, characterized in that the hub (6) comprises a connection means (16) for connecting the at least two carriers (14a, 14b), wherein the carriers (14a, 14b) are non-displaceably connected to one another by means of the connection means (16), and wherein the carriers (14a, 14b) can be separated from one another by detaching the connection means (16).

10. The friction disc (5) according to claim 9, characterized in that the connection means (16) comprises at least one first carrier (14a), at least one clip (17), and a clip opening (18) corresponding to the clip (17) on at least one second carrier (14b).

11. The friction disc (5) according to claim 10, characterized in that the clip (17) and/or the clip opening (18) comprises a latching lug (19) for latching and/or securing the clip connection.

12. The friction disc (5) according to claim 11, characterized in that the connection means (16) is adapted as an axial clip connection, wherein the at least one clip (17) is inserted into the at least one corresponding clip opening (18) until the latching lug (19) engages along the axial direction (AR).

13. The friction disc (5) according to claim 8, characterized in that at least one centering pin (20) is arranged on the first carrier (14a) and in that a centering opening (21) corresponding to the centering pin (20) is arranged on the second carrier (14b) for centering and/or guiding the at least two carriers (14a, 14b) along the axial direction (AR).

14. The friction disc (5) according to claim 11, characterized in that the connection means (16) is adapted as a bayonet connection, wherein the at least two carriers (14a, 14b) are rotated in contact with one another along the direction of rotation (DR) relative to one another until the latching lug (19) engages.

15. The friction disc (5) according to claim 9, characterized in that the at least one locking section (11) of the race (8) projects from the base body (9) of the race (8) exclusively on one side along the axial direction (AR) on the hub (6) with the connection means (16) adapted as a bayonet connection.

16. A race (8) for a friction disc (5), in particular according to claim 1, wherein the race (8) comprises a base body (9) having a constant cross-section about an axis of rotation (RA) of the friction disc (5), characterized in that the race (8) comprises at least one locking section (11) that increases the cross-section of the base body (9) and is delimited along a direction of rotation (DR) of the friction disc (5).

17. A race (8) for a friction disc (5), wherein the race (8) comprises a base body (9) having a constant cross-section about an axis of rotation (RA) of the friction disc (5), characterized in that the race (8) comprises at least one locking section (11) that increases the cross-section of the base body (9) and is delimited along a direction of rotation (DR) of the friction disc (5), and characterized in that the race (8) has one or more features of claim 15.

18. Use of a race (8) according to claim 16 for a friction disc (5).

19. A false twisting device (1) comprising a bearing block (2) with at least one rotatably mounted shaft (4) and comprising at least two friction discs (5) arranged at a distance from said shaft (4) along said shaft (4), characterized in that at least one of the friction discs (5) is adapted according to claim 1.

20. Use of a friction disc (5) according to claim 1 in a false twisting device (1) for processing textile threads (3).

21. A method for changing a race (8) of a friction disc (5), comprising the following steps: providing a friction disc (5) according to claim 1, comprising the race (8); separating the hub (6) and the race (8) from one another; providing a new race (8); replacing the race (8) with the new race (8); inserting the new race (8) with the at least one locking section (11) into the at least one recess (12) of the hub (6).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Further advantages of the invention are described in the following exemplary embodiments. These show in

[0036] FIG. 1 a schematic, perspective view of a false twisting device according to an exemplary embodiment,

[0037] FIG. 2 a cross-sectional perspective view of a friction disc according to a first exemplary embodiment,

[0038] FIG. 3 a plan view of a friction disc according to a second exemplary embodiment,

[0039] FIG. 4 a cross-section A-A of the friction disc of FIG. 3,

[0040] FIG. 5 a perspective view of the friction disc of FIGS. 3 and 4, and in

[0041] FIG. 6 a schematic, perspective view of a hub of a friction disc according to a third exemplary embodiment.

DETAILED DESCRIPTION

[0042] In the following description of the figures, the same reference symbols are used in the various figures for identical and/or at least comparable features. The individual features, their design and/or mode of action are usually only explained in detail when mentioned first. If individual features are not explained in detail again, their design and/or mode of action corresponds to the design and mode of action of the features already described with the same mode of action or under the same name.

[0043] FIG. 1 schematically shows a perspective view of an exemplary embodiment of a false twisting device 1, as used for example in texturing machinery in connection with the processing of curly textile threads 3. As is known, such false twisting devices 1 each have a bearing block 2 with a plurality of shafts 4, which are rotatably mounted about an axis of rotation RA and that are connected at the end side to a drive (not shown in FIG. 1).

[0044] As can be seen further in FIG. 1, the shafts 4, which are each equipped with friction discs 5, are arranged such that they form a triangle. In the exemplary embodiment, each of the shafts 4 comprises three friction discs 5 arranged in the gap section one behind the other in the direction of travel of the thread 3. The direction of travel of the thread is shown by arrows at the cut ends of the thread 3. When the false twisting device 1 is used as intended, the friction discs rotate about the axis of rotation RA along a direction of rotation DR.

[0045] The exact embodiment of an inventive friction disc 5 according to an exemplary embodiment is explained in more detail below with reference to FIGS. 2 to 6.

[0046] FIG. 2 shows a cross-sectional perspective view of a friction disc 5 according to a first exemplary embodiment. The friction disc 5 comprises a hub 6 with a mounting opening 7. The mounting opening 7 is formed in a mounting ring 15 of the hub 6 in order to be able to mount the shaft 4 of the false twisting device 1, see FIG. 1. On the circumferential side, the hub 6 is surrounded by a race 8 when the friction disc 5 is used as intended. The race 8 is for example designed from a polymeric material and acts on the thread 3 when used in the false twisting device 1 according to FIG. 1. Alternatively, the race 8 can also be made of any of the aforementioned materials, in particular ceramic or metal. The race 8 and the hub 6 are detachably connected to one another according to the invention such that they can be non-destructively separated for reuse of the hub 6 and/or for recycling the worn race 8.

[0047] The race 8 comprises a base body 9 with a uniform cross section about the axis of rotation RA of the friction disc 5. The hub 6 comprises a mounting contour 10 adapted to correspond to the base body 9. The race 8 also comprises at least one locking section 11 that increases the cross-section of the base body 9 and is delimited along the direction of rotation DR. The hub 6 comprises at least one recess 12 adapted to correspond to the locking section 11. The detail shown in FIG. 2 comprises three locking sections 11 on the race 8 and three corresponding recesses 12 on the hub 6. For example, the race 8 of the friction disc 5 could comprise eight locking sections 11 and the hub 6 could comprise eight recesses 12 that are evenly distributed along the direction of rotation DR.

[0048] The locking sections 11 of the race 8 and the recesses 12 of the hub 6 engage into each other in the connected state of the friction disc 5 such that an interlocking anti-rotation lock is formed. In the shown exemplary embodiment, the locking sections 11 project from the base body 9 of the race 8 along a radial direction RR. The recesses 12 of the hub 6 are thus also formed along the radial direction RR. The mounting contour 10 is partially recessed in radial direction RR by the recesses 12. A gap section 13 is formed between each two locking sections 11. In the region of the gap section 13, the race 8 comprises the base body 9, which remains constant in cross section, and the hub 6 comprises the corresponding mounting contour 10.

[0049] In the exemplary embodiment shown, the race 8 is formed integrally with the base body 9 and the at least one locking section 11. In the exemplary embodiment of FIG. 2, the hub 6 is also formed integrally.

[0050] The friction disc 5 can comprise an additional axial lock 22 to prevent unwanted separation of the race 8 from the hub 6 along an axial direction AR of the friction disc 5. In the shown exemplary embodiment, the axial lock 22 can either be formed circumferentially along the axis of rotation RA and can thus be a component of the base body 9 on the race 8. Alternatively, the axial lock 22 can be formed on the race 8 as a component of the locking section 11 and can thus be delimited along the direction of rotation DR. In the aforementioned alternatives, the hub 6 is respectively adapted to correspond to the mounting contour 10 and the at least one recess 12.

[0051] FIGS. 3-5 show different views of a friction disc 5 according to a second exemplary embodiment. The friction disc 5 is shown in FIG. 3 in a plan view, in a cross-section A-A in FIG. 4, and in a perspective view in FIG. 5.

[0052] In contrast to the exemplary embodiment in FIG. 2, the at least one locking section 11 projects from the base body 9 of the race 8 along the axial direction AR. The race 8 is then formed mirror-symmetrically, wherein the at least one locking section 11 projects on both sides from the base body 9 of the race 8 as a respective projection. In the exemplary embodiment shown, the race 8 comprises six locking sections 11 distributed evenly along the direction of rotation DR that project on both sides in axial direction AR. The locking sections 11 are each interrupted by gaps 13. The hub 6 is correspondingly adapted accordingly.

[0053] In the exemplary embodiment in FIGS. 3 to 5 (in contrast to the exemplary embodiment in FIG. 2), the hub 6 is also formed in two parts with two carriers 14a, 14b. The first carrier 14a comprises at least one clip 17 and a centering pin 20. The second carrier 14b has at least one clip opening 18 adapted to correspond to the clip 17 and a centering opening 21 adapted to correspond to the centering pin 20. The at least one clip 17, the at least one clip opening 18, the at least one centering pin 20, and the at least one centering opening 21 form a connection means 16. In the exemplary embodiment shown, the first carrier 14a has six clips 17 and the second carrier 14b has six clip openings 18, two of which are arranged in pairs in relation to each other. Each clip 17 comprises a latching lug 19, wherein the latching lugs 19 of the respectively paired clips 17 preferably face one another.

[0054] As shown in FIG. 5, the friction disc 5 can be separated from one another. This can for example be necessary if a race 8 is to be replaced. For example, if the race 8 is worn out by the intended use. The two carriers of the hub 6 can thus be reused with a new race 8.

[0055] To assemble the hub 6 consisting of the two supports 14a, 14b, the latter can be attached in axial direction AR. The connection means 16 is thus adapted as an axial clip connection. The clips 17 are then inserted into the corresponding clip openings 18 and the centering pins 20 are inserted into the corresponding centering openings 21. Before the two carriers 14a, 14b are assembled, the race 8 can be inserted into one of the two carriers 14a, 14b. In the exemplary embodiment shown, this is done by inserting the locking sections 11 of the race 8 into the corresponding recesses 12 of one of the carriers 14a, 14b. After assembly, the locking sections 11 and/or the gaps 13 detachably connect the race 8 to the two carriers 14a, 14b rotationally fixed and/or secured against widening.

[0056] In the exemplary embodiment shown, the second carrier 14b comprises the mounting ring 15 with the mounting opening 7. The mounting ring 15 extends over a width of the hub 6. The first carrier 14a abuts the mounting ring 15 of the second carrier 14b in radial direction RR. Additionally or alternatively to the centering pin 20 and the centering opening 21, this abutment allows the two carriers 14a, 14b to be guided and/or centered toward one another during assembly. The two carriers 14a, 14b can be adapted to prevent rotation along the direction of rotation DR by means of the centering pins 20 and the centering opening 21.

[0057] FIG. 6 shows a schematic, perspective view of a hub 6 of a friction disc 5 according to a third exemplary embodiment. In contrast to the exemplary embodiment in FIGS. 3 to 5, the connection means 16 of the two carriers 14a, 14b is adapted here as a bayonet connection. The connection means 16 adapted as a bayonet connection comprises at least one clip 17, at least one clip opening 18, and/or at least one latching lug 19. In the exemplary embodiment shown, the connection means 16 comprises four clips 17, four clip openings 18, and four latching lugs 19. Here, too, the latching lugs 19 are arranged on the clip 17.

[0058] To assemble the hub 6 consisting of the two carriers 14a, 14b, the latter can first be mounted in axial direction AR and the clips 17 can be inserted into the clip opening 18. The carrier 14a, 14b is then subjected to a rotational movement along the direction of rotation DR until at least one of the latching lugs 19 arranged on one of the clips 17 engages into a latching opening 23. The two carriers 14a, 14b are thus anti-rotationally connected to one another.

[0059] The race 8 is not shown in the exemplary embodiment shown. The locking sections 11 and the corresponding recesses 12 of the hub 6 are also not shown in the exemplary embodiment shown. The locking sections 11 of the race 8 can be adapted similar to the exemplary embodiment of FIGS. 3 to 5. However, the locking sections 11 preferably project from the race 8 on only one side along the axial direction AR such that one of the carriers 14a, 14b can be rotated relative to the other carrier 14a, 14b and to the race 8.

[0060] The present invention is not limited to the illustrated and described exemplary embodiments. Modifications within the scope of the claims as well as a combination of the features are also possible, even if they are shown and described in different exemplary embodiments.

LIST OF REFERENCE SYMBOLS

[0061] 1 False twisting device [0062] 2 Bearing block [0063] 3 Thread [0064] 4 Shaft [0065] 5 Friction disc [0066] 6 Hub [0067] 7 Mounting opening [0068] 8 Race [0069] 9 Base body [0070] 10 Mounting contour [0071] 11 Locking section [0072] 12 Recess [0073] 13 Gap section [0074] 14 Carrier [0075] 15 Mounting ring [0076] 16 Connection means [0077] 17 Clip [0078] 18 Clip opening [0079] 19 Latching lug [0080] 20 Centering pin [0081] 21 Centering opening [0082] 22 Axial lock [0083] 23 Latching opening [0084] RA Axis of rotation [0085] DR Direction of rotation [0086] AR Axial direction [0087] RR Radial direction [0088] B Width