JP2006503199A - Spindle for textile machinery - Google Patents

Abstract

The present invention is a spindle for a textile machine, comprising a sleeve joint, the sleeve joint entrainment body (19) having a connecting surface at the end facing outward. The connecting surface contacts the inner wall of the sleeve fitted on the spindle under the action of a centrifugal force to form a force transmitting joint between the spindle and the sleeve. For this purpose, the entrainment body is movable in the radially oriented notches under the action of centrifugal force, coaxially with respect to the respective notches towards the sleeve (15). The entrainment body acts as a seal portion between the inside and the periphery of the notch. The entrainment body (19) can be inserted into the cutout from the outside by the rear holding member (20) coupled to the entrainment body (19) at the end facing the central axis of the spindle (13). The rear holding member (20) can be locked in the notch. The spindle according to the invention has a sleeve joint which can be operated accurately without being soiled. Sleeve joints can be manufactured inexpensively and are easily and quickly assembled.

Description

  The invention relates to a spindle of the type according to the superordinate concept of claim 1 for textile machines.

  In a sleeve joint known from Swiss Patent Application No. 464751, a plurality of button-like entrainments are distributed around the spindle and arranged in the bore. The entrainment body, also called a connection button, is hollow and formed in a hat shape. The entrainment body is engaged with the undercut portion at the edge of the entrainment body, and the undercut portion is formed in the bag hole. The entrainment body is made of a spring-elastic material and is thereby inserted into the bag hole. Each spring cooperating with the entrainment body is mounted in the bag hole. The spring always presses the entrainment body outward. Accordingly, the sleeve is held by a spring force. The forces that must be overcome in the insertion and removal of the sleeve are relatively large. Since the entrained body is thin, the mass of the entrained body is small. Therefore, the force that presses the entrainment body against the sleeve is generated almost only by the spring force. The spring force must be at least large enough to ensure that the sleeve can be entrained. Such a large force is used when the empty sleeve to be inserted is moved to the operating position solely by its own weight, thereby pushing the entrainment body into the pouch hole perpendicular to the moving direction of the sleeve against the spring force. It will hinder bobbin replacement. In the doffing of a spinning machine, a large frictional force must be overcome both when the sleeve is removed and when it is inserted. Friction between the inner circumferential surface of the sleeve and the entrainment body causes wear, and the wear roughens the inner circumferential surface of the sleeve. Such a rough surface increases the coefficient of friction between the sleeve and the entrained body, and as a result, the crimping force of the sleeve increases with the passage of time of use. Sealing inside the bag hole against dirt is also insufficient, because thin-walled entrainment bodies often plastically deform non-uniformly during installation, creating gaps between the bag hole surface. is there.

  Swiss patent application 464 651 also shows a solid entrainment as another means, which is moved radially outwards by centrifugal force upon rotation of the spindle, and the inner wall of the sleeve Crimped to Each solid entrainment is inserted into a hollow chamber in the axial direction of the spindle, and is inserted into the hole from the inside to the outside at the cylindrical portion of the entrainment. The entrainment body is movably held in the hole. For the holding, the entrainment body has a rear holding shoulder portion, and the diameter of the rear holding shoulder portion is larger than the diameter of the columnar portion of the entrainment body. The spindle as a partially hollow spindle is cumbersome and requires additional wear prevention means, for example a specially constructed closure cap. Wearing such an entrainment requires dexterity and time. In addition to assembly costs, manufacturing costs are also high.

  In the sleeve joint described in DE 4323068 A1, the entrainment formed as a thin cap is likewise spring loaded. An additional mass is inserted into the deformable elastic entrainment. The spring force, and thus the resistance when the sleeve is fitted in the stationary state of the spindle, is a value of 30 to 70, which is necessary for a spring-loaded entrainment known exclusively from Swiss Patent Application No. 464751. Kept small in percent. When the spindle is stationary during the doffing process, only a small crimping force of the entrainment acts on the sleeve. As the number of rotations increases, the crimping force increases based on the centrifugal force acting on the additional mass body. Accordingly, no slip occurs between the spindle and the sleeve, although the spring force is small.

  An undercut part must be provided in the hole. The sealing action of the elastic thin-walled entrainment is also insufficient in this case. Manufacturing and assembly costs are high. The edge of the columnar member provided as an additional mass causes wear and damage over time due to the point-like pressure load on the thin-walled entrainment.

  The sleeve joint for the spindle described in German Offenlegungsschrift 4430709 A1 is provided with radial through holes. In each through hole, two substantially cylindrical bodies are inserted. The entrainment body has a connecting surface curved in a convex shape on an end surface protruding from the through hole and a conical support surface following the connection surface, and the support surface is referred to as a shoulder portion. The shoulder portion prevents the entrained body from being thrown off from the spindle when the spindle is not operated, that is, when the sleeve is not inserted into the spindle during rotation about the rotation axis. For this purpose, a corresponding facing surface is arranged on the outer periphery of the spindle corresponding to each shoulder. The opposing surface is formed by plastic deformation, and in this case, the hole has moved to the outer periphery of the spindle. It is necessary to use a tool such as chisel for deformation or caulking of the spindle when mounting the entrainment body. Such plastic deformation makes it impossible to remove the entrainment body from the hole without breaking. When the entrainment body is completely submerged in the hole when the spindle is stationary, dirt such as dust and fiber waste will accumulate between the opposing surface and the entrainment body. During the rotation of the spindle, the dirt is pressure-bonded to the opposite surface and is therefore difficult to remove. This leads to functional failure or failure of the sleeve joint.

  The object of the present invention is to improve the sleeve joint in a spindle of the type mentioned at the outset.

  The problem is solved by the configuration according to claim 1. Advantageous embodiments of the invention are described in the dependent claims.

  The present invention has various advantages. The entrainment provided on the spindle according to the invention is simply, quickly and accurately incorporated into the notch of the spindle. No time-consuming deformation of the spindle using a tool is necessary when assembling the entrainment. Furthermore, it is not necessary to form the spindle partly as a hollow spindle and to provide a closure cap for closing the hollow chamber of the hollow spindle. The entrainment according to the invention is sturdy and not easily worn. The inside of the notch of the spindle and the holding part of the entrainment inserted in the inside are effectively protected against dirt. The dirt deposited on the outer edge of the notch is scraped off again by the entrainment body. The entrainment body is formed so as to achieve entrainment of the sleeve only by centrifugal force due to the mass of the entrainment body when the spindle rotates. The rear holding member ensures that the entrainment body does not fall off the notch. In this case, the predetermined play (movement) of the entrainment body with respect to the rear holding member and thus the spindle is maintained. When the rear holding member is formed so as to be locked (fixed) in the notch by the frictional force, the undercut portion in the notch can be omitted. Installation is simple. The entrainment body is easily disassembled by means of shape-engaging holding means that prevent falling off.

  If the entrainment body and the rear holding member form a single structural unit that can be assembled in advance (can be assembled in advance), the rear holding member and the entrainment body are slightly assembled both in front and in the notch. Only need time. The manufacturing of both components also requires little expense.

  The unreleasable coupling portion between the rear holding member and the entrainment body may be formed as a rivet coupling portion, and is easily formed in terms of manufacturing technology.

  If the surface of the notch is used as a guide for the entrainment, it is advantageous that the rear holding member is formed very simply, for example as a disc spring. The manufacturing cost for providing the guide means on the rear holding member can be omitted.

  The entrainment body formed according to claim 6 has a large mass by effectively utilizing the space within the notch formed as the bag hole. When assembling the constituent unit formed by using the rear holding member as a disc spring, the constituent unit is easily inserted. The conical shape of the entrainment serves to pre-curve the disc springs conveniently for assembly.

  The spindle formed according to claim 7 enables stable three-point holding and centering with a minimum number, ie only three entrainers, in a single plane.

  In the spindle according to claim 8, it is very simple in terms of manufacturing technology to provide the through hole. Two entrainment bodies are inserted into each through hole, that is, twice as many entrainment bodies as in the case of the bag hole. In the case of a through hole, the risk of imbalance is significantly smaller than in the case of a bag hole. Removal of the entrainment is easy.

  By forming the connecting surface of the entrainment body in contact with the inner surface of the sleeve to match the curvature of the spindle surface, there are no longer any recesses or depressions in the sleeve joint where dirt can easily accumulate. In this case, a chamfered portion that is applied to the hole into which the entrainment body having a spherically-shaped connecting surface is inserted is unnecessary.

  The entrainment body and the rear holding member can be detachably coupled to each other using the entrainment body and the rear holding member as a constituent unit (separation between the two is impossible when the constituent unit is assembled in the spindle). If it is formed, the combination as a constituent unit is simple. After the entrainment body and the rear holding member are combined with each other, a deformation process for connecting them together as a constituent unit, for example, a rivet head forming process necessary for the aforementioned rivet connection is unnecessary. The holding head is formed by, for example, deformation of a pin end or by cutting before combination as a constituent unit. A component unit that is preassembled (combined) with the entrainment body and the rear holding member is inserted directly into each notch of the spindle after the assembly. In this way, the labor required for mounting is reduced.

  Not only the rear holding member formed according to claim 11 but also an entrainment body cooperating with the rear holding member is easily manufactured. The rear holding member and the entrainment body are easily combined with each other and easily separated from each other by disassembling the constituent units. Such separation is performed without destructive work.

  When the rear holding member is formed as a ring and fixed in the notch by adhesive bonding, the notch is formed as a simple hole, and the formation of the undercut part is not necessary. The ring is a particularly simple and inexpensive component of the rear holding member. Inconvenient deformations of the rear holding member that would impede the movement of the entrainment are avoided. The combination of the entrainment body and the rear holding member is easily performed with little effort.

  The sleeve joint according to the invention for the spindle can operate accurately without being soiled. Furthermore, the sleeve joint can be manufactured inexpensively and is easily and quickly assembled.

Next, the present invention will be described based on the illustrated embodiment. In the drawing
FIG. 1 is a partially broken plan view of a part of a spindle with a sleeve joint according to the invention consisting of four entrainers and fitted with a sleeve or tube;
FIG. 2 is a cross-sectional view taken along the line II of FIG.
FIG. 3 is a cross-sectional view of a spindle with a sleeve joint consisting of three entrained bodies inserted into each bag hole,
FIG. 4 is a cross-sectional view of a spindle with a sleeve joint comprising a rear holding member formed as a disc spring;
FIG. 5 is a sectional view of a spindle with a sleeve joint in which the connecting surface of the entrainment body is adapted to the curvature of the spindle surface;
FIG. 6 is a perspective view showing the component unit of the sleeve joint of FIG. 5 from the side of the pin of the entrainment body, in which the pin is partially broken;
FIG. 7 is a perspective view showing the constituent unit of the sleeve joint of FIG. 5 from the connection surface side of the entrainment body,
FIG. 8 is a perspective view of an entrainment body and a rear holding member that are detachably coupled to each other of the constituent units;
FIG. 9 is a perspective view of a structural unit formed by combining the entrainment body and the rear holding member of FIG.
FIG. 10 is a plan view, partly broken away, of a part of a spindle with a sleeve joint comprising a rear holding member formed as a ring.

  A sleeve 2 is inserted into a spindle 1 partially shown in FIG. 1, and the sleeve is held by a sleeve joint. The sleeve joint has an entrainment body 3 formed as a connection button, and each of the two entrainments is formed as two notches formed as two through holes 4 and 5 orthogonal to each other. Are inserted diametrically relative to each other.

  In FIG. 2, the entrained body inserted into the through-hole 4 drawn by a broken line is not completely shown for easy understanding of the drawing. The accompanying bodies 3 are each held by a rear holding member 6 and guided so as to be movable in the radial direction. The rear holding member 6 is locked in the through holes 4 and 5 by a frictional force caused by an interference fit. The entrainment body 3 passes through a circular opening 8 disposed at the center of the rear holding member 6 with a pin 7. The free end portion of the pin 7 is formed in the shape of a rivet head as the holding head 9, whereby the entrainment body 3 and the rear holding member 6 are coupled to each other so as not to be disengaged. The entrainment body 3 can move in a limited range relative to the rear holding member 6. The amount of movement depends on the length of the cylindrical section of the pin 7. The entrainment body 3 and the rear holding member 6 are combined with each other as a constituent unit before assembling. Both the entraining body 3 and the rear holding member 6 are rotationally symmetric members. For the combination, the cylindrical pin 7 is passed through the opening 8 of the rear holding member 6 and then the free end of the pin 7 is transformed into a holding head 9. Thus, the entrainment body 3 and the rear holding member 6 are mounted in the spindle 1 as a pre-assembled component unit. In this way, assembly and installation are simple, quick and economical. The pushing of the rear holding member 6 into the through holes 4 and 5 is performed deeply until the edge of the rear holding member 6 facing the outside is aligned with the outer edge of the through holes 4 and 5. The through holes 4 and 5 have chamfered portions 10 at both ends, and the chamfered portions prevent the formation of concave portions having corners where dirt easily accumulates. The entrainment body 3 arranged on the left side in the drawing of FIG. 1 occupies a position when the spindle 1 is stopped (at rest). The cylindrical portion of the entrainment body 3 at the illustrated position is in the same row as the outer end portion of the rear holding member 6. An end portion that faces the outside of the rear holding member 6 and forms the connecting surface 12 is formed as a spherical notch 11. The entraining body 3 arranged on the right side in the drawing of FIG. 1 occupies the position when the spindle 1 is rotated. In this case, the connecting surface 12 formed as the spherical notch 11 of the entraining body 3 is in contact with the inner peripheral surface of the sleeve 2 in a power transmission connection, that is, with a frictional force capable of transmitting the force, and the rotation of the spindle 1 The movement is transmitted to the sleeve 2. In the illustrated position, the cylindrical portion of the entraining body 3 protrudes beyond the outer end of the rear holding member 6.

  The illustrated sleeve joint is a so-called four-point centrifugal coupling (four-point centrifugal clutch). All four constituent units including the entrainment body 3 and the rear holding member 6 have the same structure and are easily mass-produced at a low cost. All four entraining bodies 3 occupy positions indicated by the entraining bodies 3 arranged on the right side as an example in FIG. When the spindle 1 is stopped, it occupies the position indicated by the entraining body 3 arranged on the left side as an example in FIG. 1 or the intermediate position where the spindle 1 is pushed again into the through holes 4 and 5 when doffing. In the sleeve joint according to the present invention, contamination inside the through holes 4 and 5 is prevented. The mounted structural unit composed of the entraining body 3 and the rear holding member 6 securely seals the inside of the through hole without a gap.

  FIG. 3 shows another embodiment of a sleeve joint according to the present invention. The sleeve joint in this embodiment is a three-point centrifugal coupling. In the sleeve joint, unlike the embodiment shown in FIGS. 1 and 2, three followers 27 having the same structure for holding and centering suitable for the function of the sleeve 15 are used. The center axes of all the entraining bodies 27 are arranged in one plane perpendicular to the center axis of the spindle 13. The plane is shown in FIG. 3 as a cross section of the spindle 13. The rear holding member 14 is shorter than the rear holding member 6 in FIGS. 1 and 2. The rear holding member 14 is easily inserted into the notch (recessed portion). The notch is formed as a bag hole 16. The bag holes 16 are deep, however, so that the bag holes do not cross each other, leaving only a thin separation wall 17 between the bag holes 16. The separation walls 17 are formed radially in FIG. The hole 16 forms a guide for the entrainment 27. The spindle 13 has a chamfered portion at the edge of the bag hole 16 as in the case of the through holes 4 and 5 of the spindle 1 in FIG. 1, and the chamfered portion does not appear in FIG. The connecting surface of the entraining body 27 is formed as a spherical notch 18. In the illustrated position, the entrainment body 27 is in contact with the inner peripheral wall of the sleeve 15. This position is occupied when the spindle 13 is rotated.

  The sleeve joint shown in FIG. 4 of the spindle 13 also has three followers 19 having the same structure. The entrainment body 19 is guided by the outer peripheral surface to the inner peripheral surface of the bag hole 16 and is locked by a rear holding member 20 formed as a disc spring. The end of the entraining body 19 facing the rear holding member 20 is formed in a conical shape. As a result, the disc spring 20 is curved and pushed in along the conical shape at the end of the entrainment body when the component unit comprising the entrainment body 19 and the disc spring 20 is mounted.

  In FIG. 4, the entrainment body 19 is shown at the inner end position pushed into the spindle 13. When the spindle 13 rotates, the entrainment body 19 moves radially outward to contact the inner wall of the sleeve 15 and entrain the sleeve. The structure of the entrainment 19 increases the mass. This advantageously affects the value of the force acting on the sleeve 15.

  FIG. 5 shows a cross section of the spindle 26, in which three entraining bodies 21 having the same structure are inserted. The entrainment body 21 is coupled to a rear holding member 22 which is also formed as a disc spring. Unlike the entraining body 19 (FIG. 4) formed with the connecting surface as a spherical notch, the connecting surface 25 of the entraining body 21 is formed in a cylindrical shape (columnar shape) and is adapted to the curvature of the spindle surface. The rear holding member 22 does not have a circular opening, but has a slot-shaped opening 23 as shown in FIG. The pin 24 is chamfered on two sides as shown. In this way, the entraining body 21 is always held in a relatively non-rotatable manner, and the connecting surface 25 enables optimum contact with the sleeve to be entrained.

  FIG. 7 shows the constituent unit composed of the entraining body 21 and the rear holding member 22 in a state before being assembled into the spindle 26. In the perspective view, the cylinder shape (columnar shape) of the connecting surface 25 can be clearly recognized.

  FIG. 8 shows the entrainment body 28 and the rear holding member 29. The entrainment body 28 has a pin 30 and a holding head 31. In the rear holding member 29 there are provided two holes 32, 33 of different sizes that overlap each other, i.e. connected to each other, both holes forming one opening 34 together. The central axis 35 of the larger hole 32 extends away from and in parallel with the rotationally symmetric axis 36 of the rear holding member 29. The smaller, that is, the central axis of the second hole 33 coincides with the rotational symmetry axis 36 of the rear holding member 29. The diameter of the hole 32 is slightly larger than the diameter of the holding head 31, whereas the diameter of the hole 33 is smaller than the diameter of the holding head 31. In order to assemble the structural unit by combining the entraining body 28 and the rear holding member 29, the rotational symmetry axis 37 of the entraining body 28 is aligned with the central axis 35 of the hole 32 (see FIG. 9). In the assembled state shown in FIG. 9, since the diameter of the holding head 31 is larger than the diameter of the hole 33, the holding head 31 prevents the entrainment body 28 and the rear holding member 29 from being separated, and the entrainment body 28 and the rear holding member. Only predetermined play (movement) in the axial direction with 29 is allowed. The structural unit shown in FIG. 9 comprising the entraining body 28 and the rear holding member 29 is inserted into the notches of the spindles 1, 13, 26 with the holding head 31 and the rear holding member 29 first. The entrainment body 28 and the rear holding member 29 are inserted into the notches of the spindles 1, 13 and 26 in the form shown in FIG. 1 or in the form shown in FIG. Form a centrifugal coupling. The rear holding member 29 is fixed in the notch, and the entrainment body 28 is held in a limited manner in the axial direction of the notch, that is, movably held over a predetermined distance. Separation of the entrainment body 28 and the rear holding member 29 at the time of disassembling the constituent units is performed simply and quickly as in the case of the combination. At least the entraining body 28 may be used again after separating the entraining body 28 and the rear holding member 29.

  FIG. 10 shows still another embodiment of the present invention. Although the spindle 38 has a plurality of notches (concave portions), only one notch is shown in FIG. 10 for easy understanding of the drawing. The notch is formed as a simple bag hole 39. The entrainment body 40 is held by a rear holding member 41 formed as a ring, and the rear holding member itself is firmly coupled to the surface of the bag hole 39 by an adhesive 42. For assembly, the ring 41 is fitted over the entrainment body 40, applied with an adhesive 42, and then inserted into the notch as a component unit. In this way, assembly is easily performed.

  The present invention is not limited to the illustrated embodiment. A configuration based on the present invention as a centrifugal clutch or a centrifugal coupling is provided, for example, by providing a coil spring in the notch of the spindle so that a radially outward force is generated in the entrained body even when the spindle is stopped or stationary. However, this does not exclude performing holding and temporary positioning of the sleeve while the spindle is already stopped.

Partially broken plan view of a portion of a spindle with a sleeve joint according to the invention and fitted with a sleeve Sectional drawing along the II line of FIG. Cross section of a spindle with a sleeve joint consisting of three entrained bodies Sectional view of a spindle with a sleeve joint consisting of a rear holding member formed as a disc spring Sectional view of a spindle with a sleeve joint wherein the connecting surface of the entrainment body is adapted to the curvature of the spindle surface The perspective view which shows the structural unit of the sleeve joint of FIG. 5 from the pin side of an entrainment body The perspective view which shows the structural unit of the sleeve joint of FIG. 5 from the connection surface side of an entrainment body The perspective view of the entrainment body and rear part holding member couple | bonded so that isolation | separation is mutually possible The perspective view of the structural unit which combines the entrainment body and rear part holding member of FIG. Partially broken plan view of a part of a spindle with a sleeve joint consisting of a rear holding member formed as a ring

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Spindle, 2 Sleeve, 3 Entrainment body, 4, 5 Through-hole, 6 Rear holding member, 7 Pin, 10 Chamfering part, 12 Connection surface, 13 Spindle, 14 Rear holding member, 15 Sleeve, 16 Bag hole, 18 Ball lack , 19 entrained body, 20 rear holding member, 21 entraining body, 24 pin, 25 connecting surface, 27, 28 entraining body, 29 rear holding member, 30 pin, 31 holding head, 32, 33 hole, 34 opening, 35 central axis , 36, 37 rotational symmetry axis, 38 spindle, 39 bag hole, 40 entrained body, 41 rear holding member, 42 adhesive

Claims (12)

A spindle for a textile machine, provided with a sleeve joint, and the entrainment body of the sleeve joint is subjected to the action of centrifugal force on the inner wall of the sleeve fitted on the spindle with the connecting surface of the end facing outward Underneath contact is made to form a force-transmitting connection between the spindle and the sleeve, for which purpose the entrainment body is subjected to centrifugal force in a radially oriented notch. In the type that can move toward the sleeve coaxially with respect to each notch, and the entrainment body acts as a seal portion between the inside and the periphery of the notch,
The entrainment body (3, 27, 19, 21, 28, 40) is the end of the spindle (1, 13, 26, 38) facing the central axis, and the entrainment body (3, 27, 19, 21, 28, 40) is held by the rear holding member (6, 14, 20, 22, 29, 41), and in this case the entrainment (3, 27, 19, 21, 28, 40) The rear holding member (6, 14, 20, 22, 29, 41) is inserted into the notch from the outside, and the rear holding member (6, 14, 20, 22, 29, 41) is inserted into the notch. A spindle for a textile machine, characterized in that it is locked.   The spindle according to claim 1, wherein the rear holding member (6, 14, 20, 22, 29) is formed in the notch so as to be lockable by a frictional force.   The entrainment body (3, 27, 19, 21, 28) and the rear holding member (6, 14, 20, 22, 29) form one constituent unit that can be assembled in advance. Spindle.   The spindle according to claim 3, wherein the entrainment body (3, 27, 19, 21) and the rear holding member (6, 14, 20, 22) are coupled to each other so as not to be dissociable.   The spindle according to any one of claims 1 to 4, wherein the surface of the notch is used as a guide for the entrainment body (3, 27, 19, 21).   The spindle according to any one of claims 1 to 5, wherein an end of the entrainment body (19, 21) facing the rear holding member (20, 22) is formed in a conical shape.   The spindle (13, 26) has at least three notches, the notches being formed as bag holes (16), the spindles (13, 16) in one plane perpendicular to the spindle axis. The spindle according to any one of claims 1 to 6, wherein the spindle is disposed around the periphery of the spindle.   The spindle (13, 26) has at least two notches formed as through holes (4, 5), each notch being perpendicular to each other and perpendicular to the spindle axis. The spindle according to any one of claims 1 to 6, wherein the spindle is arranged in a plane, and each of the two accompanying bodies (3) is inserted in each notch relative to each other in the diametrical direction.   The spindle according to any one of claims 1 to 8, wherein the connecting surface (25) of the entraining body (21) capable of contacting the inner surface of the sleeve is formed in conformity with the curvature of the spindle surface.   The entrainment body (28) and the rear holding member (6, 14, 20, 22) are coupled to each other as a constituent unit so as to be detachable from each other. In this case, the separation of the entrainment body and the rear holding member is performed by a spindle ( The spindle according to any one of claims 1 to 3, which is impossible in a state where it is assembled in (1, 13, 26).   The entrainment body (28) and the rear holding member (29) are formed as a rotating body, the entrainment body (28) has a pin (30) and a holding head (31), and the rear holding member (29) An opening (34) is provided, which is formed by two overlapping holes (32, 33). In this case, the first hole (32) is smaller than the diameter of the holding head (31). And the central axis 35 of the hole (32) extends away from and in parallel with the rotational symmetry axis (36) of the rear holding member (29), and the second hole (33). Is smaller than the diameter of the holding head (31), and the pin (30) is positioned in the second hole (33) when assembled in the spindle (1, 13, 26). The spindle according to claim 10.   2. Spindle according to claim 1, wherein the rear holding member (41) is formed as a ring and is fixed in the notch by adhesive bonding.

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