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).

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 ( 14   a ,  14   b ), wherein the two carriers ( 14   a ,  14   b ) 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 ( 14   a ,  14   b ) 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 ( 14   a ,  14   b ), wherein the carriers ( 14   a ,  14   b ) are non-displaceably connected to one another by means of the connection means ( 16 ), and wherein the carriers ( 14   a ,  14   b ) 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 ( 14   a ), at least one clip ( 17 ), and a clip opening ( 18 ) corresponding to the clip ( 17 ) on at least one second carrier ( 14   b ). 
     
     
         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 ( 14   a ) and in that a centering opening ( 21 ) corresponding to the centering pin ( 20 ) is arranged on the second carrier ( 14   b ) for centering and/or guiding the at least two carriers ( 14   a ,  14   b ) 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 ( 14   a ,  14   b ) 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 ).