JP2008281035A - Shaft fall-out prevention structure of constant velocity universal joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly prevent a shaft for the inner ring from falling-out, and also to make it easy to disassemble the inner ring and the shaft, if necessary. <P>SOLUTION: A shaft fall-out prevention structure of a constant velocity universal joint prevents a hollow shaft 13 from falling out for the inner ring 6 by spline-fitting the hollow shaft 13 into a shaft hole 12 bored in the inside diameter of the inner ring 6 of the constant velocity universal joint. In a portion corresponding to the shaft hole 12 of the inner ring 6 of the hollow shaft 13 is bored a hole 21 passing through radially between the inside diameter surface and the outside surface of the hollow shaft 13. A fall-out prevention member 23 is radially movably inserted in the hole 21, a sealing member 24 is axially movably inserted into the inside diameter portion 25 of the hollow shaft 13, and the inside diameter side end portion 23a of the fall-out prevention member 23 is locked on the outer peripheral surface of the sealing member 24 so that the outside diameter side end portion 23b of the fall-out prevention member 23 is fitted into a groove 22 formed in the shaft hole 12 of the inner ring 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a shaft retaining structure for a fixed or sliding constant velocity universal joint that is used in a power transmission system of an automobile or various industrial machines, and is incorporated in, for example, a drive shaft or propeller shaft of an automobile.

  For example, a fixed type constant velocity universal joint (Burfield type constant velocity universal joint: BJ) used as a coupling joint for a drive shaft of an automobile has a plurality of track grooves extending in the axial direction on a spherical inner peripheral surface. An outer ring as an outer member formed at equal intervals in the circumferential direction, and an inner ring as an inner member in which a plurality of track grooves extending in the axial direction on the spherical outer peripheral surface are formed at equal intervals in the circumferential direction, Between a plurality of balls that are arranged on a ball track formed by cooperation of a track groove of the outer ring and a corresponding track groove of the inner ring, and transmitting torque, between the inner peripheral surface of the outer ring and the outer peripheral surface of the inner ring And a cage for holding the ball. Each ball is accommodated in each of a plurality of pockets formed in the cage and arranged at equal intervals in the circumferential direction.

  When this constant velocity universal joint is used for a drive shaft, a shaft portion (driven shaft) that extends integrally from one end of the outer ring in the axial direction is connected to the wheel bearing device, and the shaft is spline-fitted into the shaft hole of the inner ring. The (drive shaft) is connected to the sliding type constant velocity universal joint. When the outer ring and the inner ring are angularly displaced between the outer ring shaft and the inner ring side shaft, the ball accommodated in the cage pocket is always within the bisector of the operating angle at any operating angle. This maintains the constant velocity of the joint.

  A bellows-like boot made of resin or rubber is mounted between the outer ring of the constant velocity universal joint and the shaft in order to prevent leakage of grease from the inside and entry of foreign matter from the outside. The large diameter portion of the bellows-like boot is fixed to the outer peripheral surface of the outer ring by a boot band, and the small diameter portion is fixed to the outer peripheral surface of the shaft by the boot band.

  As described above, the shaft connected to the shaft hole of the inner ring of the constant velocity universal joint is prevented from coming off from the inner ring with various structures. A hollow shaft is used as the shaft connected to the inner ring of the constant velocity universal joint in order to reduce the weight.

  For example, the hollow shaft retaining structure disclosed in Patent Document 1 is installed in the hollow interior of the spline end of the hollow shaft, and has an elastomeric sealing plug having a housing hole with a straight cross-sectional shape in the axial direction. The hollow shaft is fixed to the inner ring by a shape memory alloy stopper insert made up of an insert portion and a retaining head portion that are inserted into the receiving hole of the sealing plug.

The insert part of the stopper insert is composed of a plurality of leg parts whose shape has been memorized as a shape whose center part swells outward in the radial direction, and the retaining head part is shaped as a plate that can abut against the end face of the inner ring. Remember. In this connection structure of the inner ring and the hollow shaft, the shape memory portion is deformed so that it can be easily assembled, and then the hollow shaft is assembled to the inner ring. By colliding with the end face of the inner ring, the hollow shaft is prevented from coming off from the inner ring.
Japanese Patent Laid-Open No. 9-68233

  By the way, in the hollow shaft retaining structure disclosed in Patent Document 1 described above, the shape memory portion is deformed so that it can be easily assembled, and then the hollow shaft is assembled to the inner ring, and the shape memory portion is subjected to shape regression after the assembly. In this way, the retaining head portion is abutted against the end face of the inner ring. Thereby, it is possible to reliably prevent the shaft from coming off from the inner ring after the inner ring and the shaft are assembled.

  However, in general, in a constant velocity universal joint, the inner ring and the shaft may be disassembled due to the necessity of maintenance such as replacement of boots. On the other hand, the retaining structure in Patent Document 1 has a structure in which the retaining head part is brought into contact with the end face of the inner ring by regressing the shape memory part after the inner ring and the shaft are assembled. Due to the maintenance by, even if it is desired to disassemble the inner ring and the shaft, there is a problem that they cannot be disassembled easily.

  Therefore, the present invention has been proposed in view of the above-described problems, and the object of the present invention is to ensure that the shaft is prevented from coming off from the inner ring and to easily disassemble the inner ring and the shaft as necessary. The object is to provide a shaft retaining structure for a constant velocity universal joint.

  As a technical means for achieving the above-mentioned object, the present invention is configured such that a hollow shaft is spline-fitted into a shaft hole formed in an inner diameter of an inner member of a constant velocity universal joint, and the hollow shaft is attached to the inner member. In the shaft retaining structure of the constant velocity universal joint that prevents the shaft from coming off, a hole penetrating in the radial direction between the inner diameter surface and the outer diameter surface of the hollow shaft is formed in a portion corresponding to the shaft hole of the inner member of the hollow shaft. The retaining member is inserted into the hole so as to be movable in the radial direction, and the sealing member is inserted into the inner diameter portion of the hollow shaft so as to be movable in the axial direction. The outer diameter side end of the retaining member is fitted into a groove formed in the shaft hole of the inner member by locking the portion.

  In the shaft retaining structure of the constant velocity universal joint according to the present invention, the inner diameter side end of the retaining member inserted through the hole penetrating in the radial direction between the inner diameter surface and the outer diameter surface of the hollow shaft By locking the outer peripheral surface of the sealing member inserted through the inner diameter portion of the inner member and fitting the outer diameter side end portion of the retaining member into the groove portion of the shaft hole of the inner member. Secure the hollow shaft securely.

  On the other hand, the retaining member is inserted into the hole of the hollow shaft so as to be movable in the radial direction, and the sealing member is inserted into the inner diameter portion of the hollow shaft so as to be movable in the axial direction. By moving in the axial direction at the inner diameter portion of the shaft, the locked state of the inner diameter side end portion of the retaining member by the sealing member can be released.

  Accordingly, the retaining member moves in the radial direction through the hole of the hollow shaft, and the outer diameter side end portion is pulled out from the groove portion of the shaft hole of the inner member. In this way, the inner ring and the hollow shaft can be easily disassembled.

  In the present invention, a structure in which a plurality of holes through which the retaining member is inserted is formed along the circumferential direction of the hollow shaft is desirable. In this way, if a plurality of retaining members are arranged in the circumferential direction of the hollow shaft, the hollow shaft can be more securely retained with respect to the inner member.

  In the present invention, the sealing member preferably has a structure in which the outer diameter has a portion whose diameter is reduced along the axial direction with respect to the inner diameter portion of the hollow shaft. A tapered shape is suitable as the reduced diameter portion of the sealing member. In this way, by moving the sealing member in the axial direction at the inner diameter portion of the hollow shaft, the retaining member can be smoothly moved in the radial direction through the hole of the hollow shaft, and the retaining member is the inner member. It is possible to smoothly engage with the groove portion of the shaft hole and to remove the retaining member from the groove portion of the shaft hole of the inner member.

  According to the present invention, the end portion on the inner diameter side of the retaining member inserted in the hole penetrating in the radial direction between the inner diameter surface and the outer diameter surface of the hollow shaft is sealed by the inner diameter portion of the hollow shaft. The hollow shaft is securely retained against the inner member by engaging the outer peripheral surface of the member and fitting the outer diameter side end of the retaining member into the groove of the shaft hole of the inner member. Can do.

  Further, since the retaining member is inserted into the hole of the hollow shaft so as to be movable in the radial direction, and the sealing member is inserted into the inner diameter portion of the hollow shaft so as to be movable in the axial direction, the sealing member is inserted into the inner diameter portion of the hollow shaft. By moving in the axial direction, the locking state of the inner diameter side end of the retaining member by the sealing member can be released, and the retaining member is moved in the radial direction through the hole of the hollow shaft and the outer diameter side end thereof is moved. The part can be removed from the groove of the shaft hole of the inner member, and the inner ring and the hollow shaft can be easily disassembled.

  As a result, it is possible to realize a structure for preventing the hollow shaft from coming off from the inner member while ensuring the shaft from coming off from the inner member, and to facilitate the disassembly of the inner member and the shaft. Even when it is necessary to disassemble the inner member and the shaft, it can be easily handled.

  Embodiments of the present invention are described in detail below. In addition, although the following embodiment illustrates the case where it applies to the fixed type (Burfield type) constant velocity universal joint (BJ) of 6 balls, it is applicable also to the fixed type constant velocity universal joint of 8 balls. is there. Also, other constant velocity universal joints, for example, fixed type (undercut free type) constant velocity universal joints (UJ), sliding type (cross groove type) constant velocity universal joints (LJ) and sliding type (double offset type) ) Constant velocity universal joints (DOJ) and sliding (tripod type) constant velocity universal joints (TJ) are also applicable.

  The constant velocity universal joint of the embodiment shown in FIGS. 1 and 2 includes an outer ring 3 as an outer member in which a plurality of track grooves 2 extending in the axial direction are formed on a spherical inner peripheral surface 1 at equal intervals in the circumferential direction. An inner ring 6 as an inner member in which a plurality of track grooves 5 extending in the axial direction are formed on the spherical outer circumferential surface 4 at equal intervals in the circumferential direction, the track groove 2 of the outer ring 3 and the corresponding inner ring 6. The track grooves 5 are arranged on a ball track formed in cooperation with each other and are interposed between six balls 7 for transmitting torque and the inner peripheral surface 1 of the outer ring 3 and the outer peripheral surface 4 of the inner ring 6. And a cage 9 for holding the ball 7. Each ball 7 is accommodated one by one in each of the pockets 8 formed in the cage 9 and arranged at equal intervals in the circumferential direction.

  When the constant velocity universal joint having the above-described configuration is used for a drive shaft of an automobile, the shaft portion 11 (driven shaft) extending integrally from the bottom portion of the outer ring 3 is connected to a wheel bearing device (not shown). The shaft 13 (drive shaft) that is spline-fitted into the shaft hole 12 of the inner ring 6 is connected to a sliding type constant velocity universal joint (not shown). By connecting the inner ring 6 and the shaft 13 by spline fitting, torque can be transmitted between them.

  This constant velocity universal joint has a structure capable of transmitting torque while allowing an operating angular displacement between the two shafts of the shaft portion 11 of the outer ring 3 and the shaft 13 on the inner ring side. In other words, when the outer ring 3 and the inner ring 6 are angularly displaced by an angle, the ball 7 guided to the cage 9 is always maintained in the bisector of the operating angle at any operating angle θ, and the constant velocity of the joint. Is secured.

  A bellows-like boot 14 made of resin or rubber is mounted between the outer ring 3 of the constant velocity universal joint and the shaft 13 in order to prevent leakage of grease from the inside and entry of foreign matter from the outside. The large diameter portion of the bellows-like boot 14 is fixed to the outer peripheral surface of the outer ring by a boot band 15, and the small diameter portion is fixed to the outer peripheral surface of the shaft 13 by the boot band 16.

  In the connection structure of the inner ring 6 and the shaft 13 in this embodiment, the spline 17 is formed on the inner peripheral surface of the shaft hole 12 of the inner ring 6 and the spline 18 is formed on the outer peripheral surface of the shaft 13. The inner ring 6 and the shaft 13 are connected so as to be able to transmit torque by fitting the shaft 13 and engaging the splines 17 and 18 thereof. The shaft 13 connected to the inner ring 6 of the constant velocity universal joint is a hollow shaft in order to reduce the weight.

  In the connection structure of the inner ring 6 and the shaft 13, the shaft 13 is prevented from coming off from the inner ring 6 with the following structure. In the following, only the inner ring 6 and the shaft 13 are illustrated and described. However, the mounting and separation of the shaft 13 with respect to the inner ring 6 are performed in a state in which the inner part including the inner ring 6 is accommodated in the outer ring 3.

  As shown in FIG. 3, the portion of the shaft 13 corresponding to the shaft hole 12 of the inner ring 6, that is, the portion where the spline 18 of the shaft 13 is formed, is radially between the inner diameter surface and the outer diameter surface of the shaft 13. A hole 21 penetrating through is formed. In addition, the axial direction position of this hole 21 should just be a site | part in which the spline 18 was formed, and is arbitrary.

  On the other hand, as shown in FIG. 4, an annular groove 22 is formed in the shaft hole 12 of the inner ring 6. The groove portion 22 is provided so that the axial position thereof coincides with the hole 21 provided in the shaft 13 in a state where the shaft 13 is press-fitted into the shaft hole 12 of the inner ring 6 and is in a normal position.

  As shown in FIG. 5, the retaining member 23 is inserted into the hole 21 of the shaft 13 described above so as to be movable in the radial direction. The retaining member 23 can have various shapes such as a square bar shape (see FIG. 6A), a round bar shape (see FIG. 6B), and a fan shape (see FIG. 6C). As long as it is inserted into the hole 21 of the shaft 13 so as to be movable in the radial direction and can be fitted into the annular groove 22 provided in the shaft hole 12 of the inner ring 6, the shape thereof is arbitrary.

  Further, as shown in FIG. 5, the sealing member 24 is inserted into the inner diameter portion 25 of the shaft 13 so as to be movable in the axial direction. This sealing member 24 has a cylindrical base portion 24a because the inner diameter portion 25 of the shaft 13 is a circular hole extending in the axial direction, and its distal end portion 24b has a conical shape (see FIG. 7A). Various shapes such as a hemispherical shape (see FIG. 7B) and a slope shape (see FIG. 7C) can be used, and the above-described retaining member 23 is moved by the axial movement of the sealing member 24. If it can be moved in the radial direction, its shape is arbitrary. Moreover, although the end surface of the base 24a of the sealing member 24 forms a flat surface orthogonal to the axial direction in any of the shapes of FIGS. 7A to 7C, the sealing member 24 is pressed by a rod-shaped jig described later. Thus, it is only necessary that it can be moved in the axial direction, and its shape is arbitrary.

  In the following, as a structure for preventing the shaft 13 from coming off from the inner ring 6, the square-bar-like retaining member 23 shown in FIG. 6A and the tip 24 b shown in FIG. 7A are conical (the section is tapered). The case where the sealing member 24 in which the base 24a has a cylindrical shape is used will be described. The effects of the other shapes are the same.

  First, as shown in FIG. 5, the retaining member 23 is inserted into the hole 21 of the shaft 13 and the sealing member 24 is inserted into the inner diameter portion 25 of the shaft 13. At this time, the inner diameter side end 23 a of the retaining member 23 is brought into contact with the conical tip 24 b of the sealing member 24, and the outer diameter side end 23 b of the retaining member 23 is the minimum diameter of the spline 18 of the shaft 13. It is set as the state which is arrange | positioned inside rather than protruding from the outer peripheral surface of the shaft 13.

  In this state, the shaft 13 is fitted into the shaft hole 12 of the inner ring 6, and the spline 18 of the shaft 13 and the spline 17 of the inner ring 6 are engaged with each other, thereby connecting the inner ring 6 and the shaft 13 so as to transmit torque.

  After fitting the shaft 13, as shown in FIG. 8, a rod-shaped jig 26 is inserted into the inner diameter portion 25 of the shaft 13, and the end surface of the base portion 24 a of the sealing member 24 is pressed by the tip portion. The sealing member 24 is moved in the axial direction (left side in the figure) by pressing the sealing member 24 with the rod-shaped jig 26 (see the white arrow in the figure). By the axial movement of the sealing member 24, the retaining member 23 in which the inner diameter side end portion 23a abuts on the conical tip portion 24b of the sealing member 24 is guided by the distal end portion 24b of the sealing member 24. However, it moves outward in the radial direction (upper side in the figure).

  As shown in FIG. 9, the outer diameter of the retaining member 23 is moved by moving the sealing member 24 in the axial direction to a position where the inner diameter side end 23a of the retaining member 23 contacts the outer peripheral surface of the base 24a. The side end portion 23 b is fitted into the annular groove portion 22 of the shaft hole 12 of the inner ring 6. Thereby, the shaft 13 is reliably prevented from coming off from the inner ring 6.

  As described above, the retaining member 23 is fitted between the inner ring 6 and the shaft 13, so that the retaining member 23 does not come out even when a force in the pulling direction is applied to the shaft 13. Further, since the sealing member 24 is press-fitted into the inner diameter portion 25 of the shaft 13 with a tightening margin, the sealing member 24 does not move in the axial direction at the inner diameter portion 25 of the shaft 13 unless an external force is applied. The sealing member 24 prevents the retaining member 23 from falling off between the inner ring 6 and the shaft 13, so that the shaft 13 does not come off.

  In the above-described embodiment, the sealing member 24 is moved in the axial direction until the inner diameter side end portion 23a of the retaining member 23 is brought into contact with the outer peripheral surface of the base portion 24a of the sealing member 24. As shown in FIG. 10, the sealing member 24 is moved in the axial direction to a position where the inner diameter side end 23 a of the retaining member 23 comes into contact with the tip 24 b of the sealing member 24, and the outer diameter side end of the retaining member 23 is moved. The portion 23 b may be fitted into the annular groove portion 22 of the shaft hole 12 of the inner ring 6.

  In the above-described embodiment, the case where the outer ring 3 has one end opened and the shaft 13 is press-fitted into the shaft hole 12 of the inner ring 6 from the opening side (see FIG. 1) has been described. The invention is not limited to this, but can be applied to a structure in which both ends of the outer ring are open. In that case, as shown in FIG. It is also possible to insert the sealing member 24 into the inner diameter portion 25 of the shaft 13 from the front end side (left side in the figure) and move it in the axial direction with the rod-shaped jig 26 (see FIG. 8).

  On the other hand, when it is desired to disassemble the inner ring 6 and the shaft 13 for maintenance by replacing the boots, for example, the rod-shaped jig 26 (see FIG. 8) is inserted into the inner diameter portion 25 of the shaft 13 and the rod-shaped jig 26 is inserted. 9 further pushes the sealing member 24 in the state of FIG. 9 to the left side in the figure. By pushing the sealing member 24, as shown in FIG. 12, the locked state of the inner diameter side end 23a of the retaining member 23 by the sealing member 24 is released.

  As a result, the retaining member 23 moves radially inward (lower side in the figure) through the hole 21 of the shaft 13, and the outer diameter side end 23 b is removed from the annular groove 22 of the shaft hole 12 of the inner ring 6. In this way, the inner ring 6 and the shaft 13 can be easily disassembled.

  In addition, when the inner ring 6 and the shaft 13 are disassembled, the sealing member 24 is pushed by the rod-shaped jig 26 to move the sealing member 24 in the axial direction at the inner diameter portion 25 of the shaft 13. A coupling means (for example, screw coupling) is provided between the sealing member 24 and the sealing member 24, and the rod-shaped jig 26 and the sealing member 24 are connected by using this coupling means, and then the rod-shaped jig 26 is drawn. Thus, the sealing member 24 may be moved in the opposite direction to that described above.

  As shown in FIG. 13, the axial movement of the sealing member 24 moves the retaining member 23 radially inward through the hole 21 of the shaft 13, and the inner diameter side end 23 a of the retaining member 23 is sealed. The outer diameter side end portion 23 b is removed from the annular groove portion 22 of the shaft hole 12 of the inner ring 6. In this way, the inner ring 6 and the shaft 13 can be easily disassembled.

  Further, in the case of the structure in which both ends of the outer ring are opened, the rod-shaped jig 26 is attached from the tip side (left side in the figure) of the shaft 13 even when the inner ring 6 and the shaft 13 are disassembled, contrary to the case of the above-described embodiment. It is also possible to insert and move the sealing member 24 in the axial direction.

  The annular groove portion 22 formed in the shaft hole 12 of the inner ring 6 is not formed at the intermediate position of the spline 17 of the inner ring 6 as in the above-described embodiment, but at the tip position of the spline 17 as shown in FIG. May be. Moreover, this groove part 22 can also be formed in a part of circumferential direction besides forming it cyclically | annularly over the circumferential direction perimeter.

  The hole 21 through which the retaining member 23 is inserted may be provided not only at one place but also at a plurality of places along the circumferential direction of the shaft 13. In this way, if the plurality of retaining members 23 are arranged in the circumferential direction of the shaft 13, the shaft 13 can be more securely retained from the inner ring 6.

  The tip 24b of the sealing member 24 has a shape whose outer diameter is reduced along the axial direction with respect to the inner diameter 25 of the shaft 13, for example, a conical shape (having a tapered cross section) as described above. It is preferable to do. In this way, by moving the sealing member 24 in the axial direction at the inner diameter portion 25 of the shaft 13, the retaining member 23 can be smoothly moved in the radial direction through the hole 21 of the shaft 13. 23 can be smoothly fitted into the annular groove portion 22 of the shaft hole 12 of the inner ring 6, and the retaining member 23 can be smoothly removed from the annular groove portion 22 of the shaft hole 12 of the inner ring 6.

  The present invention is not limited to the above-described embodiments, and can of course be implemented in various forms without departing from the scope of the present invention. The scope of the present invention is not limited to patents. It includes the equivalent meanings recited in the claims, and the equivalent meanings recited in the claims, and all modifications within the scope.

It is a longitudinal section showing the whole fixed type constant velocity universal joint composition in the embodiment of the present invention. In an embodiment of the present invention, it is a transverse cross section showing the whole composition of a fixed type constant velocity universal joint. It is an expanded sectional view which shows the axial edge part of the shaft of FIG. It is an expanded sectional view which shows the inner ring | wheel of FIG. It is an expanded sectional view which shows the state which mounted | wore the shaft of FIG. 1 with the retaining member and the sealing member. The retaining member is illustrated, (a) is a square bar shape, (b) is a round bar shape, and (c) is a perspective view showing a fan shape. The sealing member is illustrated, (a) is a conical shape, (b) is a hemispherical shape, and (c) is a perspective view showing a sloped tip portion. It is sectional drawing which shows the state which inserted the rod-shaped jig | tool in the internal diameter part of the shaft in the state of FIG. It is sectional drawing which shows an example of the state which stopped the shaft with respect to the inner ring | wheel with the retaining member. It is sectional drawing which shows the other example of the state which stopped the shaft with respect to the inner ring | wheel with the retaining member. It is sectional drawing which shows the state which mounted | wore the internal diameter part of the shaft from the reverse direction of the sealing member of FIG. It is sectional drawing which shows an example of the state which cancelled | released the shaft retaining state with respect to the inner ring | wheel by the retaining member. It is sectional drawing which shows the other example of the state which cancelled | released the shaft retaining state with respect to the inner ring | wheel by the retaining member. It is sectional drawing which shows the structure which formed the annular groove part in the axial hole of the inner ring | wheel at the edge part of the spline.

Explanation of symbols

6 Inner member (inner ring)
12 shaft hole 13 hollow shaft 21 hole 22 groove 23 retaining member 23a inner diameter side end 23b outer diameter side end 24 sealing member

Claims (4)

  In the shaft retaining structure of the constant velocity universal joint, the hollow shaft is spline-fitted into the shaft hole formed in the inner diameter of the inner member of the constant velocity universal joint, and the hollow shaft is retained from the inner member. A hole penetrating in the radial direction is formed between the inner diameter surface and the outer diameter surface of the hollow shaft at a portion corresponding to the shaft hole of the inner member of the hollow shaft, and the retaining member can be moved in the radial direction in the hole. The sealing member is inserted into the inner diameter portion of the hollow shaft so as to be movable in the axial direction, and the outer end surface of the sealing member is engaged with the inner diameter side end of the retaining member, thereby removing the retaining member. A shaft retaining structure for a constant velocity universal joint, characterized in that a radial end is fitted into a groove formed in a shaft hole of an inner member.   The shaft retaining structure for a constant velocity universal joint according to claim 1, wherein a plurality of holes through which the retaining member is inserted are formed along a circumferential direction of the hollow shaft.   The shaft retaining structure for a constant velocity universal joint according to claim 1, wherein the sealing member has a portion whose outer diameter is reduced along the axial direction with respect to the inner diameter portion of the hollow shaft.   The structure for preventing the shaft from coming off of the constant velocity universal joint according to claim 3, wherein the reduced diameter portion of the sealing member is tapered.

Images