JP2010019346A - Inner side joint member for constant velocity universal joint, assembly method for constant velocity universal joint, drive shaft assembly, and propeller shaft assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inner side joint member for a constant velocity universal joint capable of carrying out assembly of a shaft without applying excessive force to a ball or a cage and capable of securing a necessary slide area on a vehicle, and to provide an assembly method for a constant velocity universal joint, a drive shaft assembly, and a propeller shaft assembly using such an inner side joint member. <P>SOLUTION: A tool 50 is attached to a joint opening side of the inner side joint member. A shaft 37 is inserted into the inner side joint member. At this time, penetration force of the shaft 37 is received by an opening side end face 55 while abutting the tool 50 on the opening side end face of an outer side joint member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an inner joint member of a constant velocity universal joint, a method for assembling the constant velocity universal joint, a drive shaft assembly, and a propeller shaft assembly.

  Propeller shafts used in automobiles such as 4WD vehicles and FR vehicles include a constant velocity universal joint so as to be able to cope with axial displacement and angular displacement due to a relative position change between the transmission and the differential. Usually, from the viewpoint of reducing the weight of the entire vehicle, a sliding type constant velocity universal joint called a Lebro type (or a cross groove type) that is lightweight and has good rotational balance and vibration characteristics is incorporated.

  The Lebro type constant velocity universal joint is roughly classified into two types, a float type and a non-float type, and both types are properly used according to the characteristics (slide amount, etc.) of the vehicle equipped with the propeller shaft.

  As shown in FIGS. 7 and 8, this type of constant velocity universal joint includes an inner ring 1, an outer ring 2, a ball 3 and a cage 4 as main components. The constant velocity universal joint shown in FIG. 7 is a float type in which the maximum outer diameter of the inner ring 1 is larger than the minimum inner diameter of the cage 4, that is, the inner ring 1 incorporated in the cage 4 does not come out in the axial direction. ing. The constant velocity universal joint shown in FIG. 8 is a non-float type in which the maximum outer diameter of the inner ring 1 is smaller than the minimum inner diameter of the cage 4, that is, the axial sliding amount of the inner ring 1 is increased. Since the non-float type has a large axial slide amount, it has a stopper mechanism for axial displacement.

  The inner ring 1 has a plurality of track grooves 6 formed on the outer peripheral surface thereof. A stub shaft of a propeller shaft is inserted into the center hole 5 of the inner ring 1 and is spline-fitted, and torque can be transmitted between the two by the spline fitting.

  The outer ring 2 is located on the outer periphery of the inner ring 1, and the same number of track grooves 7 as the track grooves 6 of the inner ring 1 are formed on the inner peripheral surface thereof. That is, the track groove 6 of the inner ring 1 and the track groove 7 of the outer ring 2 form a predetermined angle inclined in the opposite direction with respect to the axis, and the crossing of the track groove 6 of the inner ring 1 and the track groove 7 of the outer ring 2 that make a pair. A ball 3 is incorporated in the part. A cage 4 is disposed between the inner ring 1 and the outer ring 2, and the ball 3 is held in a pocket 9 of the cage 4.

  7 and 8, the outer ring 2 is a disc type, but there is a cup type as shown in FIG. 9 (Patent Document 1). The outer ring 2 in this case includes a cup-shaped large-diameter cup portion 2a and a shaft portion 2b that protrudes from the bottom of the cup portion 2a. A track groove 7 is formed on the inner diameter surface of the cup portion 2a. Further, as the internal parts 10 of the inner ring 1, the cage 4 and the ball 3, the internal parts 10 shown in FIGS. 7 and 8 are used.

  By the way, when it is a disc type, the outer ring | wheel 2 is attached to the flange for vehicle mounting (companion flange). That is, the bolt member inserted through the insertion hole (bolt hole) 8 of the outer ring 2 is screwed into the screw hole of the vehicle mounting flange. As a result, the constant velocity universal joint is fastened to the vehicle mounting flange.

On the other hand, in the cup type, the companion flange and the outer ring are integrated. For this reason, it is possible to eliminate the bolt, and it is possible to reduce the size and weight, and to reduce the number of parts and to simplify the assembly.
JP 2003-56590 A

  In the assembly when the internal part 10 is a non-float type in the cup type, as shown in FIG. 10, the rear side end surface of the inner ring 1 is brought into contact with the bottom surface 11 of the cup portion 2a. The shaft 17 is inserted into the hole 5. In this way, the inner ring 1 is fitted with the rear end face of the inner ring 1 in contact with the bottom surface of the cup portion 2 a, so that excessive force is not applied to the balls 3 and the cage 4.

  In this case, a female spline 13 is formed on the inner diameter surface of the hole 5 of the inner ring 1, and a male spline 14 is formed on the end of the shaft 17. At the time of fitting, the male spline 14 and the female spline 13 are fitted. Further, a circumferential groove 15 is provided at the end of the female spline 13, and a retaining ring (circlip) 16 is attached to the circumferential groove 15, and this circlip 16 serves as an inner diameter surface of the hole 5 of the inner ring 1. Engage with the engagement part on the back side of the joint.

  In this way, in the non-float type, as shown in FIG. 14, the required slide area on the vehicle (the range indicated by hatching, in the state where the operating angle is taken from the state where the operating angle is 0 °) When the operating angle is 0 ° with respect to the axial movement range H of the internal component 10, sliding is possible within a range larger than this region H. This is because the bottom surface 11 of the cup portion 2a is provided at a position exceeding the necessary slide range on the vehicle, and the inner ring 1 can be set to come into contact with the bottom surface 11.

  In FIG. 14, L1 indicates the movement range of the internal component 10 from the joint center to the back side when the operating angle is 0 ° (θ = 0 °). As shown in FIG. 11, L2 shows the movement range of the internal component 10 from the joint center to the back side when the operating angle is taken. Reference numeral 18 denotes an interference line between the bottom surface 11 of the inner ring 1 and the outer ring 2. In this way, the necessary slide area H on the vehicle can be secured. The slide-in means that the internal component 10 slides from the joint center to the back side (bottom surface 11 side) of the cup portion 2a of the outer ring 2, and the slide-out means that the internal component 10 moves from the joint center to the outer ring 2. It means sliding to the opening side of the cup part 2a.

  However, in the float type, as shown in FIG. 12, the end surface on the inner side of the inner ring 1 is brought into contact with the bottom surface 11 of the cup portion 2 a, and the shaft 17 is inserted into the hole 5 of the inner ring 1 in this state. For example, as shown in FIG. 15, it is impossible to secure a necessary slide region (range indicated by hatching) H on the vehicle. In other words, when the operating angle is 0 ° (θ = 0 °), the moving range L3 from the joint center to the back side of the internal component 10 can be made to correspond to the required slide region H on the vehicle. When the operating angle is taken as shown, the moving range L4 from the joint center of the internal component 10 to the back side is narrower than the necessary slide region H on the vehicle. Reference numeral 19 in FIG. 15 denotes an interference line between the bottom surface 11 of the inner ring 1 and the outer ring 2 or an interference line between the cage 4 and the bottom surface 11 of the outer ring 2.

  In view of the above problems, the present invention provides an inner joint member of a constant velocity universal joint capable of assembling a shaft without applying an excessive force to a ball or a cage and ensuring a necessary slide area on a vehicle. A method for assembling a constant velocity universal joint using such an inner joint member, a drive shaft assembly, and a propeller shaft assembly are provided.

  An inner joint member of the constant velocity universal joint of the present invention is an inner joint member of a constant velocity universal joint that is accommodated in a cup portion of an outer joint member of the constant velocity universal joint and into which a shaft is fitted. A jig hooking groove on which a jig that comes into contact and receives a shaft when the shaft is fitted is provided on the joint opening side.

  According to the inner joint member of the constant velocity universal joint of the present invention, the jig can be mounted on the inner joint member by hooking the jig into the jig hooking groove, and the receiving member is configured when the shaft is fitted. can do. In addition, the jig can receive a fitting input (press-fit load) when the shaft is fitted by contacting the outer joint member. For this reason, it is no longer necessary to bring the end face (joint back end face) of the inner joint member into contact with the bottom face (back face end face) of the cup part of the outer joint member, and the position of the bottom face of the cup part is arranged on the back side. can do.

  The hook groove preferably has a groove depth of 3 mm or more, and a wall thickness of the insertion reaction force receiving portion on the opening side of the hook groove is preferably 3 mm or more. If the groove depth is 3 mm or more, the jig can be prevented from coming off from the hooking groove when fitting input (press-fit load) is applied. In addition, when the thickness of the insertion reaction force receiving portion is 3 mm or more, the insertion reaction force can be stably received.

  A retaining ring for retaining the shaft can be attached to the shaft. Thereby, the shaft can be prevented from coming off from the inner joint member. Further, it is preferable that the shaft is fitted with a predetermined tightening allowance. As a result, torque transmission is possible without rattling.

  The constant velocity universal joint has an outer joint member in which a linear track groove is formed on the inner peripheral surface, and an inner surface in which a track groove is formed on the outer peripheral surface that is inclined in the opposite direction to the track groove of the outer joint member in the axial direction. A joint member, a plurality of balls that are arranged in each of the crossing portions of the track groove of the outer joint member and the track groove of the inner joint member, and transmit torque, and between the outer joint member and the inner joint member And a cage having a pocket for holding the ball, the maximum outer diameter of the inner joint member being set larger than the minimum inner diameter of the cage. That is, it is a float type cross groove type sliding constant velocity universal joint.

  The constant velocity universal joint has an outer joint member in which a linear track groove is formed on the inner peripheral surface, and a track groove that is inclined in the opposite direction to the axial direction of the track groove of the outer joint member on the outer peripheral surface. An inner joint member, a plurality of balls that are arranged at each of the crossing portions of the track groove of the outer joint member and the track groove of the inner joint member, and transmit torque, and the outer joint member and the inner joint member And a cage having a pocket for holding the ball, wherein the maximum outer diameter of the inner joint member is smaller than the minimum inner diameter of the cage. That is, it is a non-float type cross groove type sliding constant velocity universal joint.

  The constant velocity universal joint includes a plurality of linearly extending track grooves extending in the axial direction, an outer joint member formed on the cylindrical inner peripheral surface, and a plurality of axially extending joints that are paired with the track grooves of the outer joint member. An inner joint member having track grooves formed on the outer peripheral surface, a plurality of balls that are interposed between the track grooves of the outer joint member and the track grooves of the inner joint member, and an inner peripheral surface of the outer joint member And a cage for holding the ball interposed between the outer peripheral surface of the inner joint member and the inner joint member. That is, it is a double offset type constant velocity universal joint (DOJ).

  As described above, the constant velocity universal joint can be applied to a cross groove type sliding type constant velocity universal joint or a double offset type sliding type constant velocity universal joint. The number of balls is any number selected from 6, 8, or 10.

  The drive shaft assembly of the present invention uses the inner joint member of the constant velocity universal joint described above.

  The propeller shaft assembly of the present invention uses the inner joint member of the constant velocity universal joint described above.

  In the method of assembling the constant velocity universal joint according to the present invention, after a jig is mounted on the joint opening side of the inner joint member, the fitting input of the shaft is applied with the jig pressed against the end surface of the outer joint member. The shaft is inserted into the inner joint member while receiving at the opening side end face.

  According to the assembling method of the constant velocity universal joint of the present invention, when the shaft is fitted (press-fitted) into the inner joint member, the jig mounted on the joint opening side of the inner joint member is pushed against the opening side end surface of the outer joint member. Upon hitting, the shaft can be press-fitted into the inner joint member. That is, it is not necessary to bring the inner joint member into contact with the bottom surface of the cup portion of the outer joint member, and the position of the bottom surface of the cup portion can be arranged on the back side.

  In the present invention, since a jig which is received when the shaft is inserted is mounted, an excessive load is not applied to the ball or cage when the shaft is inserted (press-fitted), and high quality does not cause looseness after assembly. The constant velocity universal joint can be configured. In addition, in the outer joint member in which the inner joint member is incorporated, the bottom surface of the cup portion can be arranged on the back side, and the necessary slide area (necessary axial direction slide amount and required operating angle) on the vehicle can be secured. Stable in function.

  If the groove depth is 3 mm or more, when applying the fitting input (press-fit load), the jig can be prevented from coming off from the hooking groove, and the wall thickness of the fitting reaction force receiving portion is 3 mm or more. Can receive power stably. For this reason, by setting in this way, more stable press-fitting becomes possible and it is excellent in assemblability.

  The retaining ring can prevent the shaft from coming off from the inner joint member, and is stable as a product. In addition, when the shaft is inserted with a predetermined tightening allowance, torque can be transmitted without rattling and quality can be improved.

  The constant velocity universal joint can be applied to a cross groove type sliding type constant velocity universal joint and a double offset type sliding type constant velocity universal joint. Even if it is a float type cross groove type in which the maximum outer diameter of the inner joint member is larger than the minimum inner diameter of the cage, the required slide area (required axial direction slide amount and required operating angle) on the vehicle can be secured and functionally Stabilize. Further, in the non-float type cross groove type, by taking the position of the bottom portion of the cup portion on the back side, a large slide area can be obtained, which is optimal for a vehicle that requires a large slide amount.

  Thus, it can respond to the vehicle which requires the drive shaft assembly and propeller shaft assembly which need to enlarge required slide amount by using the constant velocity universal joint concerning this invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  1 to 3 show a constant velocity universal joint using an inner joint member according to the present invention. The constant velocity universal joint includes an inner ring 21 as an inner joint member according to the present invention, an outer ring 22 as an outer joint member, a ball 23 and a cage 24 as main components.

  As shown in FIG. 4, the inner ring 21 includes a main body 21 </ b> A and a sub-part 21 </ b> B connected to the joint opening side of the main body 21 </ b> A, and a plurality of track grooves 26 are formed on the outer peripheral surface thereof. Yes. The sub-part 21B is provided with a hooking groove 40 in which a jig 50 described later is mounted. The hooking groove 40 is a circumferential groove having a rectangular cross section, and the groove depth t is set to 3 mm or more. The groove width W1 is about 2 mm to 4 mm.

  The hook groove 40 is provided on the main body portion side of the sub-portion 21 </ b> B, whereby the fitting reaction force receiving portion 41 is formed closer to the joint opening side than the hook groove 40. The wall thickness W of the insertion reaction force receiving portion 41 is set to 3 mm or more. The height dimension (diameter dimension) of the insertion reaction force receiving portion 41 is the same as the groove depth t.

  As shown in FIG. 1 and the like, a female spline 33 is formed on the inner diameter surface of the hole portion 25 of the inner ring 21, and a male spline 34 is formed on the end portion of the shaft 37 inserted into the hole portion 25. At the time of insertion, the male spline 34 and the female spline 33 are fitted. Further, a circumferential groove 35 is provided at the end of the female spline 33, and a retaining ring (circular clip) 36 is attached to the circumferential groove 35, and this circular clip 36 is an inner diameter surface of the hole 25 of the inner ring 21. Is engaged with the engagement portion 38 on the back side of the joint.

  The outer ring 22 includes a cup-shaped large-diameter cup portion 22a and a shaft portion 22b protruding from the bottom of the cup portion 22a. A track groove 27 is formed on the inner diameter surface of the cup portion 22a. In this case, the track groove 26 of the inner ring 21 and the track groove 27 of the outer ring 22 form a predetermined angle inclined in the opposite direction with respect to the axis, and the pair of the track groove 26 of the inner ring 21 and the track groove 27 of the outer ring 22 Balls 23 are incorporated in the intersections.

  A cage 24 is disposed between the inner ring 21 and the outer ring 22, and the ball 23 is held in a pocket 29 of the cage 24. The maximum outer diameter of the inner ring 21 is set larger than the minimum inner diameter of the cage 24. That is, a float type cross groove type sliding type constant velocity universal joint is configured.

  1 to 3 and the like, M indicates a center line of the internal component 45 (an assembly of the inner ring 21, outer ring 22, ball 23, and cage 24), M1 indicates a slide inline, and M2 indicates a slide out line. Yes. FIG. 1 shows a state in which an inner ring 21 of an internal part 45 (an assembly of an inner ring 21, an outer ring 22, a ball 23, and a cage 24) is disposed on a joint center line M. FIG. 2 shows a state in which the inner ring 21 is disposed on the slide inline M1, (a) shows a state where the operating angle is 0 °, and (b) shows a state where the operating angle θ is taken. FIG. 3 shows a state in which the inner ring 21 is disposed on the slide outline M2.

  Next, a method for assembling the constant velocity universal joint shown in FIGS. 1 to 3 will be described. First, an internal part 45 in which the inner ring 21, the ball 23, and the cage 24 are assembled is configured, and the internal part 45 is inserted into the cup portion 22 a of the outer ring 22. After that, as shown in FIG. 5, the jig 50 is mounted by being hooked on the hook groove 40 of the inner ring 21 with a part of the inner part 45 protruding from the opening of the outer ring 22. The jig 50 is formed of a disk-like body made up of a plurality of segments 51. Each segment 51 is formed with a thin portion 52 on the inner diameter side, and an inner diameter end portion 52 a of the thin portion 52 is fitted into the hooking groove 40. That is, the thin portion 52 is formed by providing the cutout portion 54 on the inner diameter side of the back surface 53.

  Then, the rear surface of the jig 50, that is, the rear surface 53 of the segment 51 is brought into contact with the opening-side end surface 55 of the outer ring 22 in a state where the inner diameter end portion 52 a of the thin wall portion 52 of each segment 51 is fitted in the hooking groove 40. . The segments 51 in the mounted state may be integrated or not integrated. As a means for achieving integration, it is possible to configure the segment 51 by sandwiching all the segments 51 from both sides. The number of segments 51 can be arbitrarily set. The jig 50 can be formed of a single disc body without using such a plurality of segments. In this case, a shaft hole having an inner diameter protruding portion disposed at a predetermined pitch along the circumferential direction is provided, and the inner diameter protruding portion is inserted into the sub portion 21B of the inner ring 21 in a state corresponding to the track groove 26 of the inner ring 21. Then, the jig 50 may be rotated around the axial center so that the inner diameter protruding portion is fitted into the hooking groove 40.

  In this state, the shaft 37 is fitted (press-fitted) into the hole 25 of the inner ring 21. In this case, the retaining ring 36 is attached to the circumferential groove 35 of the shaft 37, and the shaft 37 is press-fitted in this state. The joint opening end of the hole portion 25 of the inner ring 21 is provided with a taper portion 39 whose diameter increases toward the opening side, and is guided by the taper portion 39 to reduce the diameter of the retaining ring 36, so that the circumferential groove It will be in the state which fits in 35, and does not become an obstacle of press fit of shaft 37. The notch 54 can form a gap for avoiding contact with the internal component 45.

  In this press-fitted state, as described above, the back surface of the jig 50 is in contact with the opening side end surface 55 of the outer ring 22, so that pressure input is received by the opening side end surface 55 of the outer ring 22 through the jig 50. Can do. For this reason, it is possible to press-fit the shaft 37 into the hole 25 of the inner ring 21.

  When the retaining ring 36 reaches the engagement portion 38 of the inner ring 21, the reduced retaining ring 36 is expanded in diameter and engaged with the engagement portion 38. That is, the retaining ring 36 has an inner diameter engaged with the circumferential groove 35 of the shaft 37 and an outer diameter engaged with the engaging portion 38 of the inner ring 21. This completes the press-fitting work. At the end of the press-fitting, the taper portion 46 of the shaft 37 abuts on the taper portion 39 of the inner ring 21 and the shaft 37 can be prevented from coming off in the axial direction. That is, the retaining ring 36 restricts the shaft 37 from being pulled out in the drawing direction (reverse press-fitting direction), and the tapered portion 46 restricts the shaft 37 from being pushed out in the pressing direction (press-fit direction). Note that the jig 50 is removed from the hooking groove 40 after the press-fitting is completed.

  By the way, the shaft 37 is inserted (press-fit) with a predetermined tightening allowance. Here, the predetermined tightening allowance is an allowance that allows the male spline 34 of the shaft 37 and the female spline 33 of the inner ring 21 to be in close contact (close contact) so that there is no play when torque is transmitted.

  In the present invention, since the jig 50 which is received when the shaft 37 is inserted is mounted, an excessive load is not applied to the ball 23 or the cage 24 when the shaft is inserted (press-fit), and rattling or the like is generated after assembly. A high-quality constant velocity universal joint can be formed.

  In the assembling method of the present invention, when the shaft 37 is fitted (press-fitted) into the inner ring 21, the jig 50 mounted on the joint opening side of the inner ring 21 presses against the opening side end surface 55 of the outer ring 22, and the shaft 37 is moved to the inner ring 21. 21 can be press-fitted. For this reason, it is not necessary to make the inner ring 21 contact the bottom surface of the cup portion 22a of the outer ring 22, and the bottom surface 60 (see FIG. 5 and the like) of the cup portion 22a can be arranged on the back side, and the necessary slide on the vehicle The area (required axial direction slide amount and required operating angle) can be secured, and the function is stable. That is, as shown in FIG. 2 (a), a slide-in state of a required slide amount on the vehicle can be secured, and the internal component 45 is attached to the cup portion 22a even when the operating angle is taken as shown in FIG. 2 (b). A stable operating angle can be obtained without contacting the bottom surface 60.

  If the groove depth is 3 mm or more, when applying the fitting input (press-fit load), the jig 50 can be prevented from coming off from the hooking groove 40, and the wall thickness of the fitting reaction force receiving portion 41 is 3 mm or more. , The insertion reaction force can be received stably. That is, the depth of the groove and the thickness of the insertion reaction force receiving portion 41 are set to the maximum press-fitting load force (for example, about 20 kN, taking into account the pressure input (press-fitting load) of the shaft 37, and between the inner ring 21 and the shaft 37. As long as it can withstand the press-fit load that is fully tightened. For this reason, by setting in this way, more stable press-fitting becomes possible and it is excellent in assemblability.

  The retaining ring 36 can prevent the shaft 37 from coming off from the inner ring 21 and is stable as a product. Further, when the shaft 37 is inserted with a predetermined tightening allowance, torque can be transmitted without rattling, and quality can be improved.

  In the above embodiment, the float type cross-groove constant velocity universal joint is set so that the maximum outer diameter of the inner ring 21 is larger than the minimum inner diameter of the cage 24, but the maximum outer diameter of the inner ring 21 is set to the minimum of the cage 24. A non-float type cross groove type constant velocity universal joint smaller than the inner diameter may be used.

  In other words, the float type cross groove type in which the maximum outer diameter of the inner joint member is larger than the minimum inner diameter of the cage can secure the required slide area (required axial slide amount and required operating angle) on the vehicle. Top stable. Further, in the non-float type cross groove type, by taking the position of the bottom portion of the cup portion on the back side, a large slide area can be obtained, which is optimal for a vehicle that requires a large slide amount.

  Further, it may be a double offset type constant velocity universal joint (DOJ). A double offset type constant velocity universal joint is formed by axially forming a pair of an outer joint member in which a plurality of linear track grooves extending in the axial direction are formed on a cylindrical inner peripheral surface and a track groove of the outer joint member. An inner joint member having a plurality of extending track grooves formed on the outer peripheral surface, a plurality of balls interposed between the track grooves of the outer joint member and the track grooves of the inner joint member, and an outer joint member And a cage for holding the ball interposed between the inner peripheral surface and the outer peripheral surface of the inner joint member.

  In any type of constant velocity universal joint, the number of balls as the torque transmission member is selected from 6, 8, or 10. That is, it is preferable that the number of balls is 8 or 10 because it is excellent in that it is possible to achieve a reduction in size and the like, but 6 balls may be used as usual.

  In the sliding type constant velocity universal joint (float type cross groove type, non-float type cross groove type, and double offset type) according to the present invention, the constant velocity free on the sliding side of the drive shaft assembly and propeller shaft assembly is possible. Can be used for fittings.

  That is, it is possible to cope with a vehicle that requires a drive shaft assembly or propeller shaft assembly that requires a large amount of slide by using the constant velocity universal joint according to the present invention.

  As described above, the embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the size of the hooking groove 40 is a groove depth t of 3 mm. Although it is preferable to set it as described above, if it is too large, it is necessary to increase the thickness of the inner ring 21 or to increase the radial length of the inner diameter end portion 52a of the jig 50. The groove depth t is preferably 5 mm or less. Further, the material of the jig 50 and the thickness of the inner diameter end portion 52a of the jig 50 are also the above-described maximum press-fit load force (for example, about 20 kN, and the space between the inner ring 21 and the shaft 37 is completely tightened. Various changes can be made within the range to withstand the press-fit load). Various changes can be made according to the groove width of the hooking groove 40. In this case, even if the groove width of the hooking groove 40 and the wall thickness of the inner diameter end portion 52a are the same, and the jig 50 is mounted on the hooking groove 40, the hook groove 40 is fitted with no gap in the axial direction. There may be some gaps.

It is sectional drawing of the constant velocity universal joint using the inner side coupling member of this invention. The slide-in state of the constant velocity universal joint is shown, (a) is a cross-sectional view when the operating angle is 0 °, and (b) is a cross-sectional view when the operating angle θ is taken. It is sectional drawing of the slide-out state of the said constant velocity universal joint. It is an expanded sectional view of the inner joint member. It is sectional drawing which shows the initial stage of the assembly method of the said constant velocity universal joint. It is sectional drawing which shows the final stage of the assembly method of the said constant velocity universal joint. It is a sectional view of a float type cross groove type constant velocity universal joint using a disc type outer ring. It is a sectional view of a non-float type cross groove type constant velocity universal joint using a disk type outer ring. It is a sectional view of a non-float type cross groove type constant velocity universal joint using a cup type outer ring. It is sectional drawing explaining the assembly method of the non-float type cross groove type constant velocity universal joint using a cup type outer ring | wheel. FIG. 11 is a cross-sectional view of the constant velocity universal joint of FIG. 10 with an operating angle θ. It is sectional drawing explaining the assembly method of the float type cross-groove type constant velocity universal joint using a cup type outer ring | wheel. FIG. 13 is a cross-sectional view of the constant velocity universal joint of FIG. 12 with an operating angle θ. It is a graph which shows the slide area | region of the non-float type cross groove type constant velocity universal joint using a cup type outer ring | wheel. It is a graph which shows the slide area | region of the float type cross groove type constant velocity universal joint using a cup type outer ring | wheel.

Explanation of symbols

22a Cup part 23 Ball 24 Cage 26 Track groove 27 Track groove 36 Retaining ring (Circlip)
37 Shaft 40 Hook groove 41 Insertion reaction force receiving portion 50 Jig 55 Open side end face

Claims (11)

An inner joint member of a constant velocity universal joint that is housed in a cup portion of an outer joint member of a constant velocity universal joint and into which a shaft is fitted,
An inner joint member of a constant velocity universal joint, characterized in that a jig hooking groove on which a jig that comes into contact with the outer joint member to receive when a shaft is fitted is provided on the joint opening side.   2. The constant velocity universal joint according to claim 1, wherein the hook groove has a groove depth of 3 mm or more and a wall thickness of an insertion reaction force receiving portion on an opening side of the hook groove is 3 mm or more. Inner joint member.   The inner joint member of the constant velocity universal joint according to claim 1 or 2, wherein a retaining ring for retaining the shaft is attached to the shaft.   The inner joint member of the constant velocity universal joint according to any one of claims 1 to 3, wherein the shaft is fitted with a predetermined tightening allowance.   The constant velocity universal joint has an outer joint member in which a linear track groove is formed on the inner peripheral surface, and a track groove that is inclined in the opposite direction to the axial direction of the track groove of the outer joint member on the outer peripheral surface. An inner joint member, a plurality of balls that are arranged at each of the crossing portions of the track groove of the outer joint member and the track groove of the inner joint member, and transmit torque, and the outer joint member and the inner joint member And a cage having a pocket for holding the ball, wherein the inner joint member is a constant velocity universal joint having a maximum outer diameter set larger than a minimum inner diameter of the cage. The inner joint member of the constant velocity universal joint according to any one of claims 4 to 5.   The constant velocity universal joint has an outer joint member in which a linear track groove is formed on the inner peripheral surface, and a track groove that is inclined in the opposite direction to the axial direction of the track groove of the outer joint member on the outer peripheral surface. An inner joint member, a plurality of balls that are arranged at each of the crossing portions of the track groove of the outer joint member and the track groove of the inner joint member, and transmit torque, and the outer joint member and the inner joint member A constant velocity universal joint comprising a cage having a pocket for holding the ball, the inner joint member having a maximum outer diameter smaller than a minimum inner diameter of the cage. The inner joint member of the constant velocity universal joint according to any one of claims 4 to 5.   The constant velocity universal joint includes a plurality of linearly extending track grooves extending in the axial direction, an outer joint member formed on the cylindrical inner peripheral surface, and a plurality of axially extending joints that are paired with the track grooves of the outer joint member. An inner joint member having track grooves formed on the outer peripheral surface, a plurality of balls that are interposed between the track grooves of the outer joint member and the track grooves of the inner joint member, and an inner peripheral surface of the outer joint member 5. A sliding type constant velocity universal joint provided with a cage for holding the ball interposed between the outer peripheral surface of the inner joint member and the inner joint member. An inner joint member of the constant velocity universal joint described in 1.   The inner joint of the constant velocity universal joint according to any one of claims 5 to 7, wherein the number of balls is any number selected from 6, 8, or 10. Element.   A drive shaft assembly using the inner joint member of the constant velocity universal joint according to any one of claims 1 to 8.   A propeller shaft assembly using the inner joint member of the constant velocity universal joint according to any one of claims 1 to 8.   After the jig is mounted on the joint opening side of the inner joint member, the fitting input of the shaft is received at the opening side end surface while the jig is pressed against the opening side end surface of the outer joint member. A method of assembling a constant velocity universal joint characterized by inserting a shaft.

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