JP2020133894A - Outer joint member for slide-type constant velocity universal joint, slide-type constant velocity universal joint, and protrusion formation device - Google Patents

Abstract

To provide a protrusion formation device capable of forming a protrusion portion of a required protrusion amount by suppressing dispersion of caulking work positions to a track groove of an outer joint member.SOLUTION: A protrusion formation device 39 for forming a protrusion portion 20 for locking an internal component, includes a convex protrusion formation portion 42 pressed to an opening end face 2a of an outer joint member 2 to form a protrusion portion 20, and a positioning portion 45 kept into contact with a track groove 5 for determining a position to press the protrusion formation portion 42 to the opening end face 2a on the basis of the track groove 5.SELECTED DRAWING: Figure 8

Description

According to the present invention, a ridge is formed on an outer joint member for a sliding constant velocity universal joint, a sliding constant velocity universal joint, and an outer joint member for a sliding constant velocity universal joint to prevent internal parts from coming off. Regarding the device.

In the power transmission system of automobiles and various industrial machines, a sliding type universal joint that transmits rotational torque at a constant speed while allowing not only angular displacement but also axial displacement between the two axes of the drive shaft and the driven shaft. Joints are used.

As the sliding type constant velocity universal joint, for example, a roller type tripod type constant velocity universal joint as shown in FIG. 15 and a ball type double offset type constant velocity universal joint as shown in FIG. 16 are known. There is.

The tripod type constant velocity universal joint 60 shown in FIG. 15 includes an outer joint member 61 having a plurality of track grooves 65 on the inner peripheral surface, a tripod member 62 as an inner joint member, and a rolling element provided on the tripod member 62. The roller 63 and the like are provided. In this constant velocity universal joint 60, the roller 63 rolls along the track groove 65 of the outer joint member 61 so that the internal parts including the roller 63 and the tripod member 62 are axially X with respect to the outer joint member 61. Move to. The "axial direction" referred to here means the direction of the central axis O of the outer joint member 61 or an arbitrary axis parallel to the central axis O. The same applies hereinafter.

On the other hand, the double offset type constant velocity universal joint 50 shown in FIG. 16 includes an outer joint member 51 having a plurality of track grooves 55 on the inner peripheral surface, an inner joint member 52 having a plurality of track grooves 56 on the outer peripheral surface, and an outer side. A plurality of balls 53 as rolling elements arranged between the opposing track grooves 55 and 56 of the joint member 51 and the inner joint member 52, and an inner peripheral surface of the outer joint member 51 and an outer peripheral surface of the inner joint member 52. A cage 54 or the like that intervenes and holds the ball 53 is provided. In the constant velocity universal joint 50, the ball 53 rolls along the track groove 55 of the outer joint member 51, so that the internal parts including the ball 53, the inner joint member 52, and the cage 54 move with respect to the outer joint member 51. Moves in the axial direction X.

By the way, in such a sliding type constant velocity universal joint, in order to prevent internal parts including rollers or balls from coming off from the open end of the outer joint member and falling off when the joint is attached to the vehicle body or the like, the outer joint A retaining structure has been proposed in which a protrusion is provided on the inner surface of the guide groove by driving a pin into the open end surface of the member so that the roller of the internal component hits the protruding portion to prevent the internal component from coming off. (See Patent Document 1 below).

Japanese Patent No. 4609050

The retaining force of such a protruding portion depends on the amount of protrusion. Therefore, it is necessary to secure a certain amount of protrusion of the protruding portion so that a sufficient retaining force can be exerted. However, the guide groove of the outer joint member on which the protrusion is formed varies in size due to machining errors, heat treatment deformation, etc., and due to this, the position where the outer joint member is crimped (the position where the pin or the like is driven) is set. However, there is a risk that the desired protrusion amount cannot be obtained.

Therefore, the present invention provides an outer joint member for a sliding constant velocity universal joint, a sliding constant velocity universal joint, and a ridge forming device capable of suppressing variation in the crimping processing position of the outer joint member with respect to the track groove. With the goal.

In order to solve the above problems, in the present invention, a track groove for accommodating the rolling element is formed on the inner peripheral surface, and the rotational torque is allowed while allowing angular displacement and axial displacement with the inner joint member via the rolling element. In the outer joint member for a sliding type constant velocity universal joint, a raised portion formed by crimping is provided on the open end side of the track groove to prevent the internal parts including the rolling element and the inner joint member from coming off. It is characterized in that a recess whose position is determined with reference to the track groove is formed on the open end surface corresponding to the portion where the raised portion is formed.

As described above, in the outer joint member according to the present invention, even if there is a dimensional error of the track groove due to processing error, heat treatment deformation, etc., the recess formed on the open end surface of the outer joint member is positioned with reference to the track groove. By being determined, it is possible to suppress variations in the amount of protrusion of the raised portion with respect to the track groove. As a result, a ridge portion having a desired amount of protrusion can be obtained.

When the rolling element and the track groove are in angular contact, it is preferable that the raised portion is within the distance between the two contact points. By doing so, it is possible to prevent contact marks and deformation of the rolling element due to contact with the raised portion from occurring at the contact point of the rolling element with respect to the track groove, and the functionality and durability of the rolling element are improved. Will be able to maintain.

Further, when a pulling force larger than the pulling force that can occur during the joint assembling work is applied to the internal parts, the raised portion may allow the internal parts to come off. In this case, since the outer joint member and the internal component can be separated after being assembled, the workability of repair and maintenance is improved.

By providing the outer joint member in the sliding constant velocity universal joint, a raised portion having a desired protrusion amount can be obtained, and it becomes possible to effectively and surely prevent the internal parts from coming off from the outer joint member. ..

The ridge forming device for forming the ridge includes a convex ridge forming portion that is pressed against the open end surface of the outer joint member to form the ridge, and a ridge that comes into contact with the track groove and is raised with reference to the track groove. Those provided with a positioning portion for determining the position at which the forming portion is pressed against the open end face are used.

By using such a ridge forming device, it becomes possible to form a ridge portion having a desired amount of protrusion. That is, by pressing the convex ridge forming portion against the open end surface of the outer joint member with the positioning portion in contact with the track groove, even if there is a dimensional error of the track groove due to machining error or heat treatment deformation. Since the variation in the pressing position of the ridge forming portion due to the variation in the track groove size is suppressed, the ridge portion having a desired protrusion amount can be obtained.

The positioning portion included in the ridge forming apparatus is preferably urged by an urging member so as to come into contact with the track groove. By doing so, the positioning portion can be reliably brought into contact with the track groove, and the positioning accuracy can be improved.

Further, by configuring a pair of crimping tools having a ridge forming portion and a positioning portion so as to be close to and separated from each other in the direction urged by the urging member and the direction opposite to the urging member, the crimping tool can be tracked. It is easy to insert and remove in the groove.

Further, a total of three pairs of crimping tools having a ridge forming portion and a positioning portion may be provided for each track groove corresponding to the track grooves provided at three positions in the circumferential direction of the outer joint member. In this case, since the raised portions can be formed at the same time for the three track grooves, the formation time of the raised portions required for one outer contact member can be shortened, and as a result, the tripod type constant velocity universal joint can be formed. It will be possible to shorten the assembly time.

According to the present invention, it is possible to suppress variations in the crimping processing position of the outer joint member with respect to the track groove, and it is possible to obtain a raised portion having a desired protrusion amount.

It is a vertical sectional view of the main part of the tripod type constant velocity universal joint which is one embodiment of this invention. It is sectional drawing of the main part of the tripod type constant velocity universal joint shown in FIG. It is an end view of the outer joint member of the tripod type constant velocity universal joint shown in FIG. 1 as seen from the open end side. It is an enlarged vertical sectional view of a main part which cut the outer joint member in the axial direction at the part of the raised part. It is a vertical cross-sectional view which shows the state before the crimping tool is inserted into a track groove. It is a vertical cross-sectional view which shows the state which the crimping tool is inserted in the track groove. FIG. 6 is a cross-sectional view taken along the line ZZ of FIG. It is a vertical cross-sectional view which shows the state which the raised part was formed by the crimping tool. It is sectional drawing which shows the state which press-fits a roller into an outer joint member. FIG. 3 is an enlarged end view of a main part showing an enlarged view of the raised part shown in FIG. It is an enlarged end view of the main part which shows the deformation example of the raised part. It is a main part enlarged end view which shows another deformation example of a raised part. It is an enlarged vertical sectional view of a main part which shows the crimping tool in an enlarged manner. It is a perspective view of the ridge forming apparatus which forms a ridge part at the same time with respect to three track grooves. It is a vertical cross-sectional view of the conventional tripod type constant velocity universal joint. It is a vertical cross-sectional view of the conventional double offset type constant velocity universal joint.

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

FIG. 1 is a vertical sectional view of a main part of a tripod type constant velocity universal joint according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part of a tripod type constant velocity universal joint according to the present embodiment.

As shown in FIGS. 1 and 2, the tripod type constant velocity universal joint 1 according to the present embodiment mainly includes an outer joint member 2, a tripod member 3 as an inner joint member, and a roller 4 as a rolling element. It is provided as a component.

The outer joint member 2 is a cup-shaped member having an opening at one end. On the inner peripheral surface of the outer joint member 2, three track grooves 5 extending in the axial direction are formed at equal intervals in the circumferential direction. Each track groove 5 is provided with a roller guide surface 5a as a rolling element guide surface facing each other. The "axial direction" in the description of the present invention means the central axis O of the outer joint member 2 or the direction X of an arbitrary axis parallel to the central axis O (see FIG. 1).

The tripod member 3 has a boss portion 6 provided with a central hole 6a, and three leg shafts 7 protruding in the radial direction from the boss portion 6. A female spline 6b that can be fitted to a male spline 8b formed at the end of the shaft 8 is formed in the central hole 6a of the boss portion 6. The end of the shaft 8 is inserted into the center hole 6a, and the male spline 8b and the female spline 6b are fitted so that the shaft 8 and the tripod member 3 are integrally rotatably connected. Further, by attaching the retaining ring 9 to the end of the shaft 8 protruding from the central hole 6a, it is possible to prevent the shaft 8 from coming off in the axial direction X with respect to the tripod member 3.

A roller unit 14 including a roller 4 or the like is attached to each leg shaft 7 of the tripod member 3. The roller unit 14 includes a roller 4 as an outer ring, an inner ring 10 arranged inside the roller 4 and externally fitted to the leg shaft 3, and a large number of rollers unit 14 interposed between the roller 4 and the inner ring 10. It is composed of a needle roller 11. The roller 4, the inner ring 10, and the needle roller 11 are assembled by washers 12 and 13 so as not to be separated from each other.

Further, the roller 4 is arranged in the track groove 5 of the outer joint member 2. As the roller 4 rolls along the roller guide surface 5a of the track groove 5, the internal parts including the roller unit 14 and the tripod member 3 are axially displaced with respect to the outer joint member 2. Further, since the cross section of the leg shaft 7 is formed in a substantially elliptical shape, the roller unit 14 can be inclined with respect to the axis of the leg shaft 7. As a result, an angular displacement in which the axis of the tripod member 3 is inclined with respect to the axis of the outer joint member 2 is also allowed. The roller unit 14 also functions as a torque transmission member that transmits rotational torque between the tripod member 3 and the outer joint member 2 when the tripod member 3 rotates with the rotation of the shaft 8.

Further, the tripod type constant velocity universal joint 1 according to the present embodiment includes boots 15 for sealing the opening of the outer joint member 2. The boot 15 includes a large-diameter end portion 15a, a small-diameter end portion (not shown), and a bellows portion 15c that connects the large-diameter end portion 15a and the small-diameter end portion. The large-diameter end portion 15a is attached by being tightened by the boot band 16 to the boot mounting portion 2b formed on the open end side of the outer diameter surface of the outer joint member 2. Further, the small diameter portion is attached to the boot mounting portion (not shown) formed on the outer diameter surface of the shaft 8 by tightening with another boot band.

Hereinafter, a retaining structure for preventing the internal parts (roller unit 14 and tripod member 3) from coming off with respect to the outer joint member 2 will be described.

FIG. 3 is an end view of the outer joint member 2 as viewed from the open end side.

As shown in FIG. 3, a raised portion 20 for preventing the internal parts from coming off is provided on the open end side of the track groove 5 of the outer joint member 2. One raised portion 20 is provided on each roller guide surface 5a of each track groove 5. Further, in the open end surface 2a of the outer joint member 2 corresponding to the portion where each of the raised portions 20 is formed, the recess 30 which is a tool mark when the outer joint member 2 is crimped in order to form the raised portion 20. Is formed. In addition, one recess 30 is formed corresponding to each raised portion 20.

FIG. 4 is an enlarged cross-sectional view of a main part in which the outer joint member 2 is cut in the axial direction X at the raised portion 20.

As shown in FIG. 4, the raised portion 20 projects inward from the roller guide surface 5a. As described above, the raised portion 20 projects inward from the roller guide surface 5a, so that the roller 4 incorporated in the outer joint member 2 moves to the joint opening side as shown by the two-point chain line in FIG. Even so, when the roller 4 abuts on the regulation surface 20a of the raised portion 20 protruding from the roller guide surface 5a, the movement of the roller 4 is restricted, and the roller 4 and the internal parts including the roller 4 are pulled out from the outer joint member 2. Be prevented.

Subsequently, a ridge forming device for forming the ridge portion 20 and a method for forming the ridge portion 20 will be described.

As shown in FIG. 5, in the ridge forming device 39, the pair of crimping tools 40, the coil spring 36 as an urging member arranged between them, and the pair of crimping tools 40 are not separated from each other too much. It is provided with a stopper 37 that regulates the position of the stopper 37. The pair of crimping tools 40 are configured to be able to approach and separate from each other via a coil spring 36. The coil spring 36 always urges the pair of crimping tools 40 in a direction away from each other. The stopper 37 supports each crimping tool 40 against the urging force of the coil spring 36, so that each crimping tool 40 is urged. The tightening tool 40 is held so as not to be separated by a predetermined interval or more.

Each crimping tool 40 is formed in an L-shaped cross section, and has a main body portion 43 extending in the left-right direction in FIG. 5 and a groove insertion portion 44 extending downward in FIG. 5 from the main body portion 43. The main body 43 is provided with a ridge-forming portion 42 having a triangular cross section that protrudes in the same direction as the groove insertion portion 44 extends. On the other hand, the groove insertion portion 44 has a convex curved surface-shaped positioning portion 45 provided on a surface opposite to the surface urged by the coil spring 36. Further, a concave spring receiving portion 46 for receiving the end portion of the coil spring 36 is provided on the surface of the groove insertion portion 44 urged by the coil spring 36.

In forming the ridge portion 20 using the ridge forming device 39 configured in this way, first, as shown in FIG. 5, a pair of crimping tools 40 are used on the open end side of the track groove 5 of the outer joint member 2. Place in. At this time, each crimping tool 40 is arranged so that the groove insertion portion 44 of each crimping tool 40 faces the track groove 5 side.

Next, as shown in FIG. 6, the groove insertion portion 44 of each crimping tool 40 is inserted into the track groove 5, and the ridge forming portion 42 is brought into contact with the open end surface 2a of the outer joint member 2. Specifically, the ridge forming portion 42 is brought into contact with the opening end surface 2a at a position close to the inner edge.

Further, in a state where the groove insertion portion 44 is inserted into the track groove 5, as shown in FIG. 6 and FIG. 7 which is a cross-sectional view taken along line ZZ thereof, the positioning portion 45 is urged by the coil spring 36 to cause the track groove. It is pressed against (roller guide surface 5a) and comes into contact with it.

The state before insertion shown in FIG. 5 so that the groove insertion portion 44 is inserted into the track groove 5 without interfering with the opening end surface 2a, and the positioning portion 45 can come into contact with the track groove 5 after insertion. The distance C between the positioning portions 45 of each crimping tool 40 held by the stopper 37, the width D of the track grooves 5 (widths of the opposing roller guide surfaces 5a) D, and the outer tip of each groove insertion portion 44. It is desirable that the relationship between the parts 44a and the distance E is set so as to satisfy E <D <C. Further, in the case of being set in this way, the positioning portion 45 comes into contact with the inner edge of the opening end surface 2a at the time of insertion, but in the present embodiment, the convex curved surface of the positioning portion 45 functions as a guide surface, which makes it smooth. It is possible to perform various insertions.

Then, in a state where the positioning portion 45 is in contact with the roller guide surface 5a of the track groove 5, as shown in FIG. 8, the crimping tool 40 presses the outer joint member 2 against the open end surface 2a by a press machine (not shown) or the like. As a result, the ridge forming portion 42 bites into the opening end surface 2a. As a result, the recess 30 is formed in the opening end surface 2a, and the portion of the roller guide surface 5a on the opening end side is plastically deformed so as to project inward to form the raised portion 20. At this time, the surface of the main body 43 of the crimping tool 40 (lower surface in FIG. 8) restrains the movement of the volume of the outer joint member 2 (movement upward in FIG. 8), so that the raised portion 20 Can be effectively and surely projected inward. Further, in the present embodiment, since the gap U (see FIGS. 6 and 8) is formed between the root 44b side of the groove insertion portion 44 and the track groove 5, the raised portion 20 is the groove insertion portion 44. It is formed in a desired shape without interfering with the above.

As described above, in the present embodiment, when the groove insertion portion 44 is inserted into the track groove 5, the positioning portion 45 comes into contact with the track groove 5, so that the ridge forming portion 42 with respect to the opening end surface 2a The pressing position is determined with reference to the track groove 5. That is, even if there is a dimensional error for each track groove 5, the pressing position of the ridge forming portion 42 is determined with reference to the track groove 5, so that the distance K from the track groove 5 to the recess 30 (see FIG. 8). ) Is set to the same distance every time.

As described above, in the present embodiment, even if the track groove 5 has a dimensional error, the protrusion amount of each raised portion 20 is set by setting the distance K from the track groove 5 to the recess 30 to the same distance each time. Can be the desired amount of protrusion. Further, in the present embodiment, the positioning portion 45 is surely pressed against the track groove 5 by the coil spring 36 and comes into contact with the track groove 5, so that the positioning accuracy of the raised portion 42 with respect to the opening end surface 2a is improved. As a result, in the present embodiment, it becomes possible to highly suppress the variation in the crimping processing position (position of the recess 30) due to the variation in the dimensions of the track groove 5, and by extension, the desired retaining force. Is obtained, and the reliability as an outer joint member having a retaining structure for internal parts is improved.

Further, as described above, after the raised portion 20 is formed in the track groove 5, the crimping tool 40 is pulled out from the track groove 5, and the crimping tool 40 is inserted into the next track groove 5. Then, in the same manner, the raised portion 20 is formed for all the track grooves 5. In the present embodiment, even when the crimping tool 40 is pulled out from the track groove 5, the convex curved surface of the positioning portion 45 functions as a guide surface, so that the crimping tool 40 can be avoided from being caught by the raised portion 20. it can.

After the raised portions 20 are formed in all the track grooves 5, the internal parts are assembled (press-fitted) to the outer joint member 2. At this time, as shown in FIG. 9, the roller 4 comes into contact with the raised portion 20, but from this state, the roller 4 is pushed into the back side of the track groove 5 to spread the roller guide surfaces 5a facing each other by elastic deformation. As a result, the roller 4 can be inserted into the back side. As a result, the roller 4 is inserted into the back side of the track groove 5, and the assembly of the internal parts is completed.

After the roller 4 gets over the raised portion 20 and is incorporated into the track groove 5, the raised portion 20 prevents the internal parts including the roller 4 from coming off. Since the retaining force of the raised portion 20 is set to be greater than the pulling force that can be generated during the joint assembling work to the vehicle body or the like, the pulling force generated during the joint assembling work causes the internal parts to come out of the outer joint member 2. There is no.

On the other hand, considering repair and maintenance of the joint, it is preferable that the internal parts can be separated from the outer joint member. Therefore, in the present embodiment, when a pulling force larger than the pulling force that can occur during the joint assembling work is applied to the internal parts, the raised portion 20 has a raised amount and a shape that allow the internal parts to come off. It has been adjusted. As a result, even after the joint is assembled, the outer joint member and the internal component can be separated and reassembled, and the workability of repair and maintenance can be improved.

Further, as shown in FIG. 4, in the embodiment of the present invention, the internal parts are separated by having an inclined surface 20b inclined with respect to the roller guide surface 5a at least a part of the regulation surface 20a. Deformation of the roller 4 at that time can be suppressed. The inclined surface 20b is inclined so that the amount of protrusion decreases from the opening end surface 2a side of the outer joint member 2 toward the inner side in the axial direction opposite to the opening end surface 2a side. Since the regulation surface 20a has such an inclined surface 20b, when the internal parts are separated from the outer joint member 2, the bite of the raised portion 20 into the roller 4 is reduced, and the constant velocity universal joint is greatly deformed. The outer joint member and the inner component can be separated with a pulling force that does not occur.

The plurality of raised portions 20 formed on the outer joint member 2 do not all have to have the same protruding amount. The amount of protrusion of the raised portion 20 may be different for each outer joint member 2, each track groove 5, or each raised portion 20.

Further, the regulation surface 20a of the raised portion 20 has a linear shape (without a dent) as shown in FIG. 10 and an end portion in the width direction as shown in FIG. 11 when viewed from the axial direction X of the outer joint member 2. It may have a concave curved surface that is recessed on the center side rather than the side. As shown in FIG. 11, the term "width direction" as used herein refers to the track groove 5 of the portion where the raised portion 20 is formed in the cross section of the outer joint member 2 cut along the plane orthogonal to the axial direction X. It means the direction Y along the shape line. In particular, when the shape of the regulation surface 20a is a concave curved surface as shown in FIG. 11, the contact range between the raised portion 20 and the roller 4 is increased as compared with the case of the linear shape shown in FIG. The retaining force of 20 is improved. That is, in the case of the example shown in FIG. 10, since the curvature of the regulation surface 20a is close to the curvature of the convex curved surface which is the shape of the outer peripheral surface 4a of the roller 4, the contact range between the roller 4 and the regulation surface 20a increases. The roller 4 gets over the raised portion 20 and is hard to fall off.

Further, as in the example shown in FIG. 12, the regulation surface 20a may be formed not in a curved shape (concave curved surface shape) but in a straight line alone or in a concave shape formed by combining a straight line and a curved line. Even with such a shape, the shape of the regulation surface 20a is closer to the shape of the outer peripheral surface 4a of the roller 4 as compared with the comparative example in which the regulation surface 20a is not formed in a concave shape, so that the roller 4 and the regulation surface 20a It is possible to widen the contact range with.

In order to change the shape of the regulation surface 20a, the shape of the raised portion 42 of the crimping tool 40 may be appropriately changed according to the shape. Specifically, in FIG. 13, the shape of the surface 42a on the left side (inner diameter side of the joint) of the surfaces 42a and 42b forming the two triangular sides of the ridge forming portion 42 may be changed. If the shape of the inner surface 42a is changed, the shape is transferred to the concave portion 30 (the surface 30a on the inner diameter side of the joint shown in FIGS. 10, 11, and 12), and the raised portion 20 follows this. The regulation surface 20a of the above can be formed into a desired shape.

Further, as shown in FIGS. 10, 11, and 12, when the outer peripheral surface 4a of the roller 4 and the roller guide surface 5a come into contact with each other at a predetermined contact angle α, that is, so-called angular contact, the outer peripheral surface of the roller 4 is contacted. It is preferable that the raised portion 20 fits within the distance between the two contact points S where the 4a and the roller guide surface 5a come into contact with each other. Here, in order for the raised portion 20 to fit within the distance between the two contact points S, the width dimension B of the recess 30 is set to be smaller than the distance A between the two contact points S (B <A). ). By making the raised portion 20 fit within the distance between the two contact points S in this way, the contact marks and deformations of the roller 4 due to the contact with the raised portion 20 are caused by the contact points (contact points) of the roller 4 with respect to the track groove 5. Since it does not occur at the contact point S), it is possible to maintain good functionality and durability of the roller 4.

In the above-described embodiment, a pair of crimping tools 40 are used to form two raised portions 20 at the same time for one track groove 5, but all the raised portions 20 can be formed at the same time. It may be. On the contrary, it is also possible to form the raised portions 20 one by one by using one crimping tool 40.

FIG. 14 shows an example of a ridge forming device 39 that simultaneously forms a ridge 20 with respect to three track grooves 5.

In the example shown in FIG. 14, the ridge forming device 39 includes three pairs (six) of crimping tools 40. The configuration of each crimping tool 40 is vertically opposite to that of the crimping tool 40 shown in FIG. 5, but the configuration and shape are basically the same as those of the crimping tool 40 shown in FIG. Further, each crimping tool 40 is arranged in a groove portion 48 provided in the support base 47 of the ridge forming device 39, respectively. In FIG. 14, the pair of crimping tools 40 facing each other via the coil spring 36 slide and move along the groove 48 in the direction of the arrow in the figure, so that the crimping tools 40 can be brought close to each other and separated from each other. is there. Further, in the groove portion 48, a stopper 37 is fixed to prevent the pair of crimping tools 40 from being separated by a urging force of the coil spring 36 by a predetermined interval or more.

By arranging a pair of crimping tools 40 as described above for each track groove 5 corresponding to the track grooves 5 provided at three locations in the circumferential direction of the outer contact member 2 shown in FIG. It is possible to form the raised portion 20 at the same time with respect to the track groove 5 at the location. That is, by arranging the crimping tools 40 at such positions, each crimping tool 40 can be inserted into the three track grooves 5 at the same time. Then, as described above, while the positioning portion 45 of each crimping tool 40 is brought into contact with the roller guide surface 5a of the track groove 5, the raised forming portion 42 of each crimping tool 40 is brought into contact with the open end surface of the outer joint member 2. By biting into 2a, it is possible to simultaneously form the raised portion 20 with respect to the three track grooves 5 (six roller guide surfaces 5a). As a result, the formation time of the raised portion 20 required for one outer contact member 2 can be shortened, and the assembling time of the tripod type constant velocity universal joint can be shortened.

Further, the present invention is not limited to a roller type sliding constant velocity universal joint having a roller as a rolling element, but also a ball type sliding constant velocity universal joint having a ball as a rolling element as shown in FIG. It is also applicable to the outer joint member used in the above, and further to a ridge forming device for forming a ridge portion for preventing the internal parts from coming off in the outer joint member. By applying the present invention to such a ball-type sliding constant velocity universal joint, an outer joint member, and a ridge forming device, it is possible to suppress variations in the crimping processing position of the outer joint member with respect to the track groove, which is desired. A raised portion with a protruding amount can be obtained.

1 Tripod type constant velocity universal joint (sliding constant velocity universal joint)
2 Outer joint member 2a Open end face 3 Tripod member (inner joint member)
4 Roller (roller)
5 Track groove 20 Raised part 30 Recessed part 36 Coil spring (urging member)
40 Clamping tool 42 Raised part 45 Positioning part S Contact point

Claims (8)

A track groove for accommodating a rolling element is formed on the inner peripheral surface, and a sliding constant velocity universal joint that transmits rotational torque while allowing angular displacement and axial displacement with the inner joint member via the rolling element. In the outer joint member for
On the open end side of the track groove, there is a raised portion formed by crimping to prevent the internal parts including the rolling element and the inner joint member from coming off.
An outer joint member for a sliding constant velocity universal joint, characterized in that a concave portion positioned with reference to the track groove is formed on an open end surface corresponding to a portion where the raised portion is formed. The outer joint member for a sliding constant velocity universal joint according to claim 1, wherein the rolling element and the track groove are in angular contact, and the raised portion is fitted within the distance between the two contact points. The sliding according to claim 1 or 2, wherein when a pulling force larger than a pulling force that can occur during the joint assembling work is applied to the internal component, the raised portion allows the internal component to be pulled out. Outer joint member for constant velocity universal joint. Angular displacement and axial displacement between the outer joint member having a track groove formed on the inner peripheral surface, the rolling element rotatably arranged in the track groove, and the outer joint member via the rolling element. In a sliding constant velocity universal joint comprising an inner joint member that transmits rotational torque while allowing
A sliding type constant velocity universal joint comprising the outer joint member according to any one of claims 1 to 3 as the outer joint member. The track of the outer joint member having a track groove formed on the inner peripheral surface for accommodating the rolling element and transmitting rotational torque while allowing angular displacement and axial displacement with the inner joint member via the rolling element. A ridge forming device for forming a ridge for preventing the internal parts including the rolling element and the inner joint member from coming off on the opening end side of the groove.
A convex ridge forming portion that is pressed against the open end surface of the outer joint member to form the ridge portion,
A positioning portion that comes into contact with the track groove and determines a position where the ridge forming portion is pressed against the opening end surface with reference to the track groove.
A ridge forming device characterized by comprising. The ridge forming apparatus according to claim 5, further comprising an urging member that urges the positioning portion to come into contact with the track groove. A pair of crimping tools having the ridge forming portion and the positioning portion are provided.
The ridge forming device according to claim 6, wherein the pair of crimping tools are configured so as to be able to approach and separate from each other in a direction urged by the urging member and a direction opposite to the urging member. A claim that a total of three pairs of crimping tools having the ridge forming portion and the positioning portion are provided for each of the track grooves, corresponding to the track grooves provided at three positions in the circumferential direction of the outer joint member. The ridge forming apparatus according to any one of 5 to 7.

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