Abstract:
The invention relates to a paint roller having a multi-part bearing which is disposed on a frame and onto which a tubular roll body can be slipped. The bearing here comprises an inner part encompassing the frame and an outer part encompassing the inner part, the inner part and the outer part being able to be twisted in contrarotation and an external diameter of the outer part being able to be enlarged and diminished depending on a twist direction.

Description:
FIELD OF THE INVENTION  
       [0001]     The invention relates to a paint roller including a multi-part bearing disposed on a frame.  
       BACKGROUND OF THE INVENTION  
       [0002]     A paint roller of this type is known, for example, from DE 101 29 479 A1. This paint roller has two two-part bearings disposed on a frame and consisting of a bearing inner race and a bearing outer race, a tubular roll body being able to be slipped onto the bearing outer races. This paint roller construction is also referred to as a so-called cage system. The cage system is characterized in that the bearings form a structural unit with the paint roller frame and the exchangeable paint roller roll consists merely of a tube provided with a covering. In the case of the known paint rollers, the paint roller roll is held on the bearings by a press fit. The use of a press fit between the bearing and the roll body means in the design, however, that a compromise always has to be reached between the desire for a high clamping force and the desire for good ease of fitting and removal. The high clamping force is absolutely necessary to prevent an axial movement of the roll body on the bearings.  
         [0003]     The object of the invention is to develop a paint roller having a tubular roll body, in which an axial displacement of the roll body during use of the paint roller is safely prevented and, at the same time, the roll body can be fitted and removed without a large amount of force being required.  
       SUMMARY OF THE INVENTION  
       [0004]     The paint roller according to the invention has a bearing, which comprises an inner part encompassing the frame and an outer part encompassing the inner part, the inner part and the outer part being able to be twisted in contrarotation and an external diameter of the outer part being able to be enlarged and diminished depending on the twist direction. It is thereby possible, for the tubular roll body to be slipped onto and pulled off from the bearing disposed on the frame, to lessen the external diameter of the bearing or of the outer part of the bearing and thus to reduce a clamping force acting between the bearing and the tubular roll body. On the other hand, through an appropriate positioning of the inner part and the outer part, the paint roller according to the invention allows the external diameter of the outer part to be enlarged and the clamping force acting between the tubular roll body and the bearing to be thereby increased. Thus, for the operation of the paint roller, a clamping force can now be provided which safely prevents an axial migration of the tubular roll body. The core of the invention is thus a bearing whose external diameter is variable, the change in diameter being effected by an alteration of the radial position or of the radial and axial position adopted by the inner part and the outer part of the bearing relative to each other.  
         [0005]     According to the invention, the outer part of the bearing is configured as an expandable sleeve and, in particular, as a sleeve having a slot which divides the sleeve. An outer part of this type, which forms a clasp, is easy to make and its external diameter can be altered to a considerable extent.  
         [0006]     The invention further envisages that on the inner part there is configured an outer peripheral surface, which has, in the peripheral direction, an increasing or decreasing distance r to a longitudinal axis L of the frame. Such eccentric or camshaft-like shaping of the inner part enables the measure desired for the expansion of the outer part to be easily determined.  
         [0007]     With respect to the outer part, the invention envisages that an approximately cylindrical inner peripheral surface is configured there, which, in the peripheral direction, has an approximately constant distance R to the longitudinal axis L of the frame. The enlargement or diminution of the external diameter of the outer part can thus simply be determined by the deviation of the inner part from a cylindrical form, resulting in an easy-to-plan design.  
         [0008]     Of course, the invention also envisages a corresponding reverse solution, in which the inner part slides with stops on an inner peripheral surface of the outer part, which surface, in the peripheral direction, has an increasing or decreasing distance to a longitudinal axis of the frame. It is thereby possible, with the above-stated advantages, to alter the external diameter of the outer part through a contrarotational twisting of the inner part and the outer part.  
         [0009]     The invention envisages a cooperation of the outer peripheral surface of the inner part with the inner peripheral surface of the outer part, the outer part sliding, with at least one web disposed on its inner peripheral surface, on the outer peripheral surface of the inner part and thereby experiencing a change to the external diameter, and the twisting capability of the inner part and the outer part being limited by a stop disposed on the outer peripheral surface of the inner part, which stop cooperates with the web and blocks the latter. A torsional limitation, which, at the same time, allows the structural parts to be twisted slightly in contrarotation, is thereby realized in a simple manner. This slight twisting capability is also maintained in adverse conditions, since, if paint happens to penetrate between the outer part and the inner part, only small areas stick together and such adhesions can be freed with a reasonable force expenditure.  
         [0010]     The invention envisages a twist angle α&lt;360 degrees and, in particular, α&lt;90 degrees. It is thereby possible to support the outer part on the inner part with at least one and, in particular, four webs evenly distributed over the periphery, and thus to achieve an even distribution of the pressing force of the outer part onto the inner wall of the tubular roll body.  
         [0011]     An advantageous embodiment envisages that the inner part is provided with a formed-on adjusting means, which allows the inner part to be secured or twisted by the user. The use of an aid for the fitting or removal operation can thus be dispensed with.  
         [0012]     According to the invention, it is further envisaged that the internal diameter of the roll body and the external diameter of the outer part which it assumes in the unclamped state are designed as a light press fit. It is thereby possible to slip the roll body onto the outer part with little force and also to twist the roll body with the outer part counter to the inner part and the inner part counter to the roll body and the outer part in order to establish or release clamping. The light press fit serves, above all, to generate the initial radial force between the sleeve and the roll body which is necessary to actuate the clamping mechanism. By a press fit should be understood, within the meaning of the invention, not only a fit in which two cylindrical contacting surfaces lie fully one-against-the-other, but any cooperation of two structural parts which are slipped one-inside-the-other and which have a punctiform, linear or planar frictional engagement with the other.  
         [0013]     With regard to the desired light press fit between the roll body and the outer part, it is advantageous to provide the peripheral surface of the outer part at least partially with an antislip coating and to encase the outer part with at least one rubber ring.  
         [0014]     One embodiment of the invention envisages that the tubular roll body is supported on the clamping bearing, consisting of an outer part and an inner part, and on a pilot bearing disposed on a free end of the frame. It is thereby possible to exchange the bearings individually, where necessary, in the event of a repair.  
         [0015]     A further embodiment envisages that the inner part of the clamping bearing is configured as a grid tube, which extends the entire length of the roll body and forms a constituent part of a satellite bearing disposed at the free end of the frame. Such a design prevents tilting when the tubular roll body is slipped onto the basic structure of the paint roller and thus facilitates assembly of the roll body.  
         [0016]     The invention also envisages that the contact surface between the outer part and the roll body is limited to, maximally, one-quarter of the length of the roll body. This prevents excessive pull-off forces should the outer part and the roll body become stuck together.  
         [0017]     According to the invention, an inner part, configured as a cone, has a contacting surface having a thread. An outer part, configured as a clasp, a slotted sleeve, or a hollow cylinder with slot, bears on a threaded conical inner contacting surface. The threads of the inner and outer parts cooperate allowing the diameter of the outer part to be determined by the position which the outer part and the inner part adopt relative to each other. With a clamping bearing of this type, the clamping force can be finely set and large clamping forces can be obtained with little exertion.  
         [0018]     The invention envisages that the threads of the inner part and of the outer part are configured as trapezoidal threads, guaranteeing smooth running when an adjustment is made. Of course, the invention also provides for the use of other motion-transmitting threads.  
         [0019]     Finally, the invention envisages that the roll body is supported against the frame indirectly via an annular rim formed on the inner part or directly. This prevents the roll body, in an effective and simple manner, from being displaced by the outer part in an axial direction (x) when the clamping force is generated.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0020]     Further details of the invention are described in the drawing with reference to diagrammatically represented illustrative embodiments.  FIG. 1 : shows a top view of a first embodiment of a paint roller;  FIG. 2 : shows a perspective representation of the paint roller represented in  FIG. 1 , without tubular roll body;  
         [0021]      FIGS. 3   a ,  3   b : show a section through the paint roller, corresponding to the sectional line III-III represented in  FIG. 1 , in two different positions of the bearing;  
         [0022]      FIG. 4 : shows a longitudinal section through the paint roller, corresponding to the sectional line IV-IV represented in  FIG. 1 ;  
         [0023]      FIG. 5 : shows a further perspective representation of the paint roller with the bearing represented in a cut-open state;  
         [0024]      FIG. 6 : shows an enlarged representation of the cut-open bearing;  
         [0025]      FIG. 7 : shows a representation according to  FIG. 6  without being cut open;  
         [0026]      FIG. 8 : shows a top view of a second embodiment of a paint roller without representation of the roll body;  
         [0027]      FIG. 9 : shows a side view of the paint roller represented in  FIG. 8 ;  
         [0028]      FIG. 10 : shows a perspective representation of the paint roller represented in  FIGS. 8 and 9 ;  
         [0029]      FIGS. 11 and 12 : show perspective representations of the tubular inner part;  
         [0030]      FIG. 13 : shows a perspective representation of the paint roller with bearings represented in the form of sections;  
         [0031]      FIG. 14 : shows an enlarged detailed view of the clamping bearing from  FIG. 13 ;  
         [0032]      FIG. 15 : shows an enlarged detailed view of the satellite bearing from  FIG. 13 ;  
         [0033]      FIG. 16 : shows a perspective representation of a third embodiment of a paint roller;  
         [0034]      FIG. 17 : shows a perspective representation of the paint roller shown in  FIG. 16 , with a cut-open roll body;  
         [0035]     FIGS.  18 ,  19 : show detailed views of  FIG. 17 ;  
         [0036]     FIGS.  20 ,  21 : show perspective sectional representations of a clamping bearing of the paint roller in different positions; and  
         [0037]     FIGS.  22 ,  23 : show perspective representations of the clamping bearing in different positions. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0038]     The figures show three embodiments of a paint roller according to the invention, FIGS.  1  to  7  showing a first embodiment, FIGS.  8  to  15  a second embodiment, and FIGS.  16  to  23  a third embodiment.  
         [0039]     In  FIG. 1 , a top view of a paint roller  1  is represented. The paint roller  1  comprises a bent frame  2 , which, at a first free end  3 , has a handle  4 . At a second free end  5  of the frame  2  there is disposed a tubular roll body  6 , which is borne by two bearings  7  and  8  (see  FIG. 2 ). Here the bearing  7  is configured as a clamping bearing  9  and the bearing  8  as a pilot bearing  10  with a sealing ring (not represented).  
         [0040]     In  FIG. 2 , which shows the paint roller  1  represented in  FIG. 1  in perspective view without the tubular roll body, wings  11  disposed on the pilot bearing  10  are also visible, by which the tubular roll body  6  (not shown in  FIG. 2 ) is borne in clamping arrangement.  FIG. 2  thus shows a structural unit B which is somewhat similar to that of a so-called cage system paint roller and which is completed by the roll body (not represented). The clamping bearing  9  and the pilot bearing  10  are respectively secured by a non-visible retaining washer against an axial displacement on the free end  5  of the frame  2 .  
         [0041]      FIGS. 3   a  and  3   b  show a section, along the sectional line III-III represented in  FIG. 1 , through the tubular roll body  6  in the region of the clamping bearing  9 . Here, the clamping bearing  9  is shown in  FIG. 3   a  in a release position I, in which the roll body  6  can be pulled off from the clamping bearing  9  or slipped onto the latter.  FIG. 3   b  shows the clamping bearing  9  in a clamping position II, in which the roll body  6  is fixed on the clamping bearing  9 .  
         [0042]      FIG. 3   a  shows in detail a roll body  6 , which is constructed in two parts and consists of a cylindrical inner tube  12  and a coating  13 , which is shrunk thereon. As the coating  13 , foam, for example, can be used. As a result of the diagrammatic form of representation chosen for  FIGS. 3   a  and  3   b , an air gap  14  is clearly discernible between the roll body  6  and the clamping bearing  9 , which air gap shows that these two structural parts are decoupled one from the other and the roll body  6  can be pulled off from the clamping bearing  9 . The clamping bearing  9  is essentially composed of an inner part  15  and an outer part  16 . The inner part  15  is mounted on the frame  2  so as to be freely rotatable about the longitudinal axis L thereof. In addition, the inner part  15  has an outer peripheral surface  17 , on which four stops  18  to  21  are disposed. Between the stops  18  to  21 , the outer peripheral surface  17  has respectively a distance to the longitudinal axis L which increases from r 1  to r 2 . The outer part  16 , in the region of an outer peripheral surface  22 , is covered by an antislip coating S and, on an inner peripheral surface  23 , bears four webs  24  to  27 . In addition, the outer part  16  is divided by a slot  28  running parallel to the longitudinal axis L. This slot  28  allows an expansion of the outer part  16  from a small diameter D 1  to a large diameter D 2  (compare  FIG. 3   b ).  
         [0043]     The expansion of the outer part  16  is effected by a rotation of the inner part  15  in a rotational direction w 1  by a rotation angle α of about 80° (see  FIG. 3   b ). Here, the webs  24  to  27  slide on the outer peripheral surface  17  of the inner part  15  and the stops  18  to  21  slide on the inner peripheral surface  23  of the outer part  16 . The outer part  16  forming a sleeve  29  is expanded by virtue of the increasing distance r 1  to r 2  of the outer peripheral surface  17  of the inner part  15 . The maximally expanded outer part  16  with the maximally expanded antislip coating S is represented in  FIG. 3   b . In this clamping position II, the air gap  14  still present in  FIG. 3   a  is closed. In the clamping position II with the diameter D 2 , the outer part  16  assumes a diameter ensuring a press fit which makes it impossible for the roll body  6  to be slipped off under normal conditions. A relocation of the clamping bearing  9  from the clamping position II into the release position I is effected by a twisting of the inner part  15  in a rotational direction w 2  counter to the outer part  16  and the roll body  6 . Alternatively, for the unclamping of the clamping bearing  9 , a twisting of the outer part  16  with the roll body  6  in the rotational direction w 1  counter to the inner part  15  is, of course, possible.  
         [0044]      FIG. 4  illustrates a longitudinal section roughly corresponding to a sectional line IV-IV represented in  FIG. 1 , a representation of the pilot bearing  10  having been omitted from the sectional view. The sectional view shows the clamping bearing  9  seated on the frame  2 , the clamping bearing  9  being in the release position I shown in  FIG. 3   a  and thus the air gap  14  being formed to the roll body  6 , which air gap allows the removal of the roll body. The longitudinal section shows a step-shaped configuration of the inner part  15  and of the outer part  16 . In addition, in the longitudinal section, adjusting means  30  are discernible, which are formed on the inner part  15  via webs  31  and allow a manual rotation of the inner part  15  on the frame  2  so as to be able to switch the clamping bearing  9  from the release position I to the clamping position II (see  FIG. 3   b ). The air gap  14  represented in  FIGS. 3   a  and  4 , which, in the release position I, is shown between the outer part  16  and the roll body  6 , serves, in these diagrammatic representations, merely to pictorially illustrate the release position. In a fully functional paint roller  1 , the outer part  16  and the roll body  6 , in a first embodiment, are in light mutual contact, even in the release position, so that the outer part  16  can rest against the roll body  6 , which, if need be, is held by hand, and so that the outer part  16 , when the switch is made from the release position I to the clamping position II, is not transported by the inner part  15 . Additionally, to counteract possible movement caused by inertia of the outer part  16 , a positive-locking support of the outer part  16  against the roll body  6  is also envisaged. This can be achieved, for example, by an eccentric shaping or a wedge-shaft-like toothing between the two structural parts. According to a further embodiment, it is envisaged that the cohesion between the outer part and the roll body  6  is realized by at least one knob or rib. In such an embodiment, a gap between the structural parts would then, of course, be visible in the sectional view in some areas.  
         [0045]      FIG. 5  shows a further perspective representation of the structural unit B of the paint roller  1 , the paint roller  1  being shown with the clamping bearing  9  represented in a cut-open state.  
         [0046]      FIG. 6  shows an enlarged representation of the clamping bearing  9  represented in  FIG. 5 . It can be seen from this how the lateral cohesion of the inner part  15  and the outer part  16  is effected. The outer part  16  engages, with lugs  32  distributed over the periphery, in a circumferential groove  33  of the inner part  15 . An offset arrangement of the stops  18  to  21  and of the webs  24  to  27 , which arrangement is not discernible in the sectional representations in  FIG. 3   a  and  FIG. 3   b , allows a more even distribution of the force with which the inner part  15  clamps the outer part  16  in the clamping position II shown in  FIG. 3   b . Despite this distribution of the force to eight regions, the path of adjustment of approximately a ¼-revolution is maintained.  
         [0047]      FIG. 7  shows the clamping bearing  9  represented in  FIG. 6 , in closed form. In this representation, the cooperation of the stop  18  with the web  27 , which cooperation is not visible in  FIG. 6 , can also be seen.  
         [0048]      FIG. 8  shows a second embodiment of a paint roller  1 . Of the paint roller  1 , only one structural unit B is represented. The representation of a roll body  6  has been dispensed with. At a second free end  5  of the frame  2 , two bearings  7  and  8  are visible. The bearings  7 ,  8  are realized as a clamping bearing  9  and as a satellite bearing  34 , an inner part  15  of the clamping bearing  9  being realized as a grid tube  35  and serving as a constituent part of both bearings  7  and  8 .  
         [0049]      FIG. 9  shows a side view, from an arrow direction IX, of the paint roller represented in  FIG. 8 .  
         [0050]      FIG. 10  shows a perspective view of the structural unit B, represented in  FIGS. 8 and 9 , of the paint roller  1 . In this representation, the frame  2 , on which bearings  7  and  8  run, can be seen running through the grid tube  35 . In addition, analogous to the first embodiment of the paint roller, adjusting means  30  are discernible, which are connected to the grid tube  35  and the inner part  15  respectively.  
         [0051]      FIGS. 11 and 12  show the inner part  15  or grid tube  35  in two perspective views. In these representations, stops  18 ,  19  and  21  are discernible, which are disposed on an outer peripheral surface  17  of the inner part  15 . In the region of the satellite bearing  34 , the inner part  15  is shaped like a cylinder.  
         [0052]      FIG. 13  shows a perspective representation of the structural unit B of the paint roller  1  with bearings  7  and  8  represented in cut-open state. In  FIG. 14 , a corresponding enlargement of the bearing  7  is depicted. On the inner part  15 , which is configured as a grid tube  35 , there is guided an outer part  16  having an antislip coating S. Unlike the first embodiment, the inner part  15  is mounted on the frame by means of a sliding sleeve  36 . A U-washer  52  protects the sliding sleeve  36  against a crimp  38  located on the frame  2  and holds the bearing  7  in position.  
         [0053]     In  FIG. 15 , the bearing  8  is represented on an enlarged scale in accordance with the representation in  FIG. 13 . A spacing sleeve  39  keeps the grid tube  35  at a distance from the frame  2 . The bearing  8  is completed by a cap  40 , which is seated on a cylindrical projection  41  of the grid tube  35 . The bearings  7  and  8  are prevented from being pulled off by a spring clip  42  seated on the frame  2 .  
         [0054]     In  FIG. 16 , a third embodiment of a paint roller  1  is represented in perspective view. The paint roller  1  comprises a frame  2 , which, at a first free end  3 , has a handle  4 . At a second free end  5  of the frame  2  there is disposed a tubular roll body  6 .  
         [0055]     In  FIG. 17 , the paint roller  1  shown in  FIG. 16  is represented in a cut-open state. The cut-open roll body  6  is borne by two bearings  7  and  8 , represented in cut-open state. Here, the bearing  7  is configured as a clamping bearing  9  and the bearing  8  as a pilot bearing  10 . In addition, wings  11  disposed on the pilot bearing  10  are visible, by which the roll body  6  is borne in clamping arrangement.  FIG. 17  thus again shows a structural unit B which is typical of the cage system and which is completed by the roll body  6  to give the paint roller  1 . The clamping bearing  9  and the pilot bearing  10  are respectively secured by a clamping or retaining washer  42  (see  FIG. 17 ) against an axial displacement on the frame  2  (see also  FIG. 18 ).  
         [0056]     In  FIG. 18 , the pilot bearing  10  shown in  FIG. 17  is represented in a detailed view. Through a lid-shaped configuration of the pilot bearing  10 , a cavity  43 , which is formed between the frame  2  and the roll body  6 , is sealed against paint penetration.  
         [0057]     In  FIG. 19 , the clamping bearing  9  shown in  FIG. 17  is represented in a detailed view. The clamping bearing  9  comprises an inner part  15  and an outer part  16 , the inner part  15  being held on the free end  5  of the frame  2  by the aforementioned, non-visible retaining washer so as not to be displaced on the frame  2  in the direction of a longitudinal axis L.  
         [0058]     In  FIG. 20 , there is now portrayed an enlarged sectional representation in the region of the clamping bearing  9  through the paint roller  1  shown in  FIG. 16 . In this representation, the retaining washer  37 , too, is visible, which fixes the inner part  15  on the frame  2  in the axial direction. Parallel to the retaining washer  37 , a U-washer  52  is mounted on the frame  2 , which protects the adjusting means  30  against damage from a crimp  38  and secures the position of the clamping bearing  9 . The inner part  15  is realized as a cone  44 , which is rotatably mounted on the frame  2  and which bears, on a conical contacting surface  45 , a trapezoidal thread  46 . The outer part  16  is realized, in accordance with the inner part  15 , as a slotted hollow cylinder  47 , which bears, on a conical inner contacting surface  48 , a trapezoidal thread  49 , which cooperates with the trapezoidal thread  46  of the inner part  15 . Via an antislip coating S fastened on the slotted hollow cylinder  47 , the outer part  16  is in frictionally engaged contact with the roll body  6 . The inner part  15  can be rotated via formed-on wings or adjusting means  30  about the frame  2  and the longitudinal axis L. A rotation of the inner part  15  in an arrow direction w 1  about the longitudinal axis L brings about an axial motion of the outer part  16  in an arrow direction x. A prerequisite for this is that the outer part  16  is supported against the roll body  6  and that the roll body  6  is stationary. A roll body  6 , which jointly rotates more slowly than the inner part  15 , slows the motion of the outer part  16  in the arrow direction x. A roll body  6 , which rotates in an opposite arrow direction w 2 , accelerates the motion of the outer part in the arrow direction s. The outer part  16  is thus moved, relative to the inner part  15  and to the roll body  6 , out of the release position shown in  FIG. 20  into the clamping position II represented in  FIG. 21 . In the clamping operation, the roll body  6  alters its position relative to the inner part  15  and to the frame  2  at most minimally, since it rests, counter to the pushing force of the outer part  16 , against an annular rim  50  of the inner part  15 . From the clamping position II shown in  FIG. 21 , the outer part  16  can be moved, by a rotation of the inner part  15  in the rotational direction w 2 , back into the release position I shown in  FIG. 20 . For this purpose, the outer part  16  moves between the roll body  6  and the inner part  15  in an arrow direction x′. Insofar as the outer part  16  in the process transports the roll body  6  in the arrow direction x′, this facilitates the deliberate pulling-off of the roll body  6 .  
         [0059]     In  FIGS. 22 and 23 , there are shown two detailed views of the clamping bearing  9  without slipped-on roll body  6 , corresponding with the representations of  FIGS. 20 and 21 .  FIG. 22  shows the clamping bearing  9  in the release position I. In this position, the slotted hollow cylinder  47  of the outer part  16 , configured as a clasp, has only a relatively narrow gap  51  with a width b 51  and a small diameter D 1 .  FIG. 23  shows the clamping bearing  9  in the clamping position II, which is achieved by a contrarotational twisting of the inner part  15  and of the outer part  16 . The twisting leads to a change in the axial and the radial position which the parts  15  and  16  adopt relative to each other. In the clamping position II, the slotted hollow cylinder  47  forming the outer part  16  is expanded to a large diameter D 2  and shows a wide slot or gap  51  with a large width B 51 . FIGS.  16  to  23  should be regarded, with respect to the represented dimensions, as diagrammatic representations. An increase in diameter ΔD=D 2 −D 1  which the outer part  16  experiences during the expansion should be tailored, of course, to the dimensions of the structural parts and to the properties of the materials used for the individual structural parts.  
         [0060]     The invention is not limited to represented or described illustrative embodiments, but comprises refinements of the invention within the scope of the patent claims. In particular, the invention also provides for the use of a second clamping bearing.  
       REFERENCE SYMBOL LIST  
       [0061]      1  paint roller  
         [0062]      2  frame  
         [0063]      3  first free end of  2   
         [0064]      4  handle  
         [0065]      5  second free end of  2   
         [0066]      6  tubular roll body  
         [0067]      7 ,  8  bearings  
         [0068]      9  clamping bearing  
         [0069]      10  pilot bearing  
         [0070]      11  wings on  8  and  10   
         [0071]      12  inner tube of  6   
         [0072]      13  coating of  6   
         [0073]      14  air gap between  6  and  16   
         [0074]      15  inner part of  9   
         [0075]      16  outer part of  9   
         [0076]      17  outer peripheral surface of  15   
         [0077]      18  to  21  stop on  17   
         [0078]      22  outer peripheral surface of  16   
         [0079]      23  inner peripheral surface of  16   
         [0080]      24  to  27  web on  16   
         [0081]      28  slot in  16   
         [0082]      29  sleeve with slot  
         [0083]      30  adjusting means on  15   
         [0084]      31  web on  15   
         [0085]      32  lug on  16   
         [0086]      33  groove in  15   
         [0087]      34  satellite bearing  
         [0088]      35  grid tube  
         [0089]      36  slide sleeve for  15   
         [0090]      37  washer  
         [0091]      38  crimp on  2   
         [0092]      39  spacing sleeve for  15   
         [0093]      40  cap  
         [0094]      41  cylindrical projection of  15  and  35   
         [0095]      42  spring clip  
         [0096]      43  cavity between  6  and  2   
         [0097]      44  cone  
         [0098]      45  contacting surface of  44   
         [0099]      46  trapezoidal thread of  44  on  45   
         [0100]      47  slotted hollow cylinder  
         [0101]      48  conical inner contacting surface of  47   
         [0102]      49  trapezoidal thread of  47  on  48   
         [0103]      50  annular rim of  15   
         [0104]      51  gap of  47   
         [0105]      52  U-washer for  15   
         [0106]     α twist angle  
         [0107]     B structural unit  
         [0108]     b 51  small width of  51   
         [0109]     B 51  large width of  51   
         [0110]     D 1 , D 2  diameter of  16   
         [0111]     ΔD diameter increase of  16   
         [0112]     L longitudinal axis  
         [0113]     R radius of  23   
         [0114]     r 1 , r 2  radius of  17   
         [0115]     S antislip coating on  16   
         [0116]     w 1 , w 2  rotational direction  
         [0117]     x, x′ axial motional directions of  16   
         [0118]     I release position  
         [0119]     II clamping position