WO2013015334A1

WO2013015334A1 - Wheel bearing assembly device and assembly method therefor

Info

Publication number: WO2013015334A1
Application number: PCT/JP2012/068882
Authority: WO
Inventors: 梅木田　光; 浩也加藤
Original assignee: Ntn株式会社
Priority date: 2011-07-26
Filing date: 2012-07-25
Publication date: 2013-01-31
Also published as: JP2013024393A

Abstract

[Problem] To provide a wheel bearing assembly device, which effectively limits the expansion of the ring during swaging and prevents deformation of the outer circumferential splines of the ring, and an assembly method therefor. [Solution] A wheel bearing assembly device in which a ring (21), on which outer circumferential splines (21b) are formed, is fitted onto the end of the small diameter part (4b) of the hub ring (4), and the ring (21) and an inner race (7) are fixed on the small diameter part (4b) so as to keep the rings from slipping therefrom by means of a swaged part (11) formed by plastically deforming the end of the small diameter part (4b) outward in the radial direction. The device is provided with a restricting ring (28), which fits onto the outer circumferential splines (21b) of the ring (21) and prevents diameter expansion of the ring (21) when the swaged part (11) is being worked. Splines (30), which have the same specifications as the outer circumferential splines (21b) of the ring (21) and mesh therewith, are formed on the inner circumference of the restricting ring (28). The inner border of the splines (30) is formed in a tapered shape in which the diameter decreases gradually towards the center of the vehicle.

Description

Assembly device for wheel bearing device and assembly method thereof

The present invention relates to a wheel bearing device for rotatably supporting a wheel of an automobile or the like, and more particularly to an assembly device for a wheel bearing device having a clutch function for switching a wheel between driving and non-driving. The present invention relates to an assembly device for a wheel bearing device in which a gear member is assembled by tightening and a method for assembling the same.

Some four-wheel drive vehicles allow front wheels or rear wheels to be selectively switched to driven wheels by the clutch function provided in the wheel bearing device. In such a wheel bearing device 50 with a clutch function, as shown in FIG. 6, a double-row tapered roller bearing 53 is disposed on the outer periphery of a shaft portion 52 of a hub wheel (inner shaft) 51. In some cases, a ring body (coupler) 54 with a spline is disposed on the end side of the shaft portion 52 of the shaft 51. The ring body 54 has splines formed on the inner peripheral side and the outer peripheral side, the inner peripheral side spline is spline-fitted with the outer periphery of the hub wheel 51, and the outer peripheral side spline is connected to the bearing device 50. A switch (not shown) and a spline can be fitted. When the ring body 54 on the hub wheel 51 side and the connection switch are in a fitted state, the rotational driving force is transmitted from the connection switch to the hub wheel 51 via the ring body 54, and the bearing device 50 functions as a drive wheel. Alternatively, the bearing device 50 can function as a driven wheel by being switched to the non-fitted state in the ring body 54. That is, the bearing device 50 is applied to an automobile that can be switched to a four-wheel drive type.

The double row tapered roller bearing 53 includes an inner ring member 55 having two rows of inner ring raceways fitted to the shaft portion 52, an outer ring member 56 having two rows of outer ring raceways, and two tapered rollers arranged in two rows. The outer ring member 56 is formed with a radially outward flange portion 58 on the outer periphery of the outer ring member 56.

In the assembly method of the bearing device 50, first, the inner ring member 55 of the double row tapered roller bearing 53 is externally fitted to the shaft portion 52 of the hub wheel 51. The inner ring member 55 and the ring body 54 are fixed to the hub wheel 51 so as not to come off.

In the caulking process, a hub wheel 51 in which the inner ring member 55 and the ring body 54 of the double row tapered roller bearing 53 are externally fitted is arranged on a horizontal base 60 and provided above the hub wheel 51. A crimping tool 59, a diameter expansion prevention jig A that is fitted into one end of the crimping tool 59 and the hub wheel 51, and a press drive device (not shown) that operates the diameter expansion prevention jig A. Done.

The diameter expansion prevention jig A is an annular block body that inserts a shaft-shaped caulking tool 59 that is inclined and rotated with an interval, and an annular base 61 whose upper and lower surfaces are in a horizontal plane, An annular guide block 62 fixed to the outer peripheral side of the lower surface of the base 61 and a restraining ring 63 that is held in a suspended manner on the annular base 61 and provided on the inner peripheral side of the annular guide block 62 are provided.

The pressing drive device moves the annular base 61 up and down and generates a downward pressing force on the annular base 61 as indicated by an arrow P. Therefore, when the annular base 61 is lowered by the operation of the pressing drive device, the guide block 62 and the restraining ring 63 are lowered. When the restraining ring 63 comes into contact with the ring body 54 externally fitted to the hub wheel 51 of the bearing device 50, a downward pressing force acts on the annular base 61 as shown by an arrow P by the action of the pressing drive device. Then, the restraining ring 63 can press the ring body 54 downward in the vertical direction through the guide block 62 by the pressing force, and can be tightened radially inward.

Thus, when caulking is performed so that a part of the end portion of the hub wheel 51 is expanded radially outward, the restraining ring 63 is fitted and brought into contact with the outer periphery of the ring body 54 to increase the diameter of the ring body 54. By preventing this, deformation and cracking of the ring body 54 due to excessive expansion can be prevented, and the expansion amount of the ring body 54 can be kept constant without being affected by the finished outer diameter of the ring body 54. (For example, refer to Patent Document 1).

JP 2006-153053 A

In this conventional bearing device 50, the spline on the outer peripheral side of the ring body 54 comes into contact with the restraining ring 63, and the expansion of the ring body 54 is suppressed. However, since the inner peripheral contact surface of the restraining ring 63 is formed as a smooth surface, the spline teeth (large to small diameters) may be deformed and the effect of the restraining ring 63 may not be sufficiently obtained. There is sex.

The present invention has been made in view of such circumstances, and the assembly of a wheel bearing device that effectively suppresses expansion of the ring body during caulking and prevents deformation of the outer peripheral spline portion of the ring body. An object of the present invention is to provide an apparatus and a method for assembling the apparatus.

In order to achieve such an object, the invention according to claim 1 of the present invention includes an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel attachment for attaching a wheel to one end. A hub wheel having a flange integrally formed with a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring via a predetermined shimiro An inner member having a double-row inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and a cage between both rolling surfaces of the inner member and the outer member. A ring body in which an outer peripheral spline portion is formed on an end portion of the small-diameter step portion of the hub wheel, and an end portion of the small-diameter step portion. The ring body and the inner ring are connected to the small-diameter stepped portion by a crimped portion formed by plastic deformation of In the assembly apparatus for a wheel bearing device that is assembled by being fixed with a lock, a constraining ring that prevents external expansion of the ring body by external fitting contact with the outer peripheral spline portion of the ring body when the caulking portion is processed. The inner periphery of the restraining ring is formed in an uneven shape that meshes with the outer periphery spline portion of the ring body.

In this way, a crimped portion formed by externally fitting a ring body having an outer peripheral spline portion at the end portion of the small-diameter step portion of the hub wheel and plastically deforming the end portion of the small-diameter step portion radially outward. In the assembly device for a wheel bearing device in which the ring body and the inner ring are assembled with the small-diameter stepped portion being secured to the small-diameter step portion, when the caulking portion is processed, the ring body and the inner ring are brought into outer contact with the outer peripheral spline portion. Equipped with a restraining ring that prevents the diameter of the body from expanding, and the inner circumference of this restraining ring is formed in a concavo-convex shape that meshes with the outer periphery spline part of the ring body, which effectively expands the ring body during caulking And the deformation of the outer peripheral spline portion of the ring body can be prevented.

Preferably, as in the invention described in claim 2, if a spline having the same specifications as the outer peripheral spline portion of the ring body is formed on the inner periphery of the restraining ring, the ring body is in contact with each other. It is possible to reliably prevent deformation of the outer peripheral spline part.

Further, as in the invention described in claim 3, if the inner periphery of the constraining ring is formed in a tapered shape that gradually decreases in diameter toward the inner side, a ring body that is a location where a hoop stress is generated by caulking. It is possible to effectively constrain the inner side end of the.

Further, as in the invention according to claim 4, if at least the small-diameter surface of the concavity and convexity large-diameter surface and small-diameter surface of the constraining ring is in contact with the outer peripheral spline portion of the ring body, By bringing the close portions into contact with each other, deformation of the outer peripheral spline portion can be reliably prevented, and expansion of the ring body can be suppressed to a minimum.

Moreover, if the said restraint ring is formed in the single annular | circular shape like invention of Claim 5, a ring body can be restrained with an axial load, handling can be simplified, and equipment of Miniaturization is possible.

Further, as in the invention described in claim 6, the outer joint member constituting the constant velocity universal joint is coupled to the inner member, and the outer peripheral surface of the outer joint member is the same as the outer peripheral spline portion of the ring body. An axle side spline portion having the same diameter and the same shape is formed, and the outer peripheral spline portion and the axle side spline portion are arranged coaxially with each other, and the drive side is slidable in the axial direction on the axle side spline portion. The inner peripheral spline part of the gear ring may be engaged.

According to a seventh aspect of the present invention, there is provided a method invention according to claim 7, wherein an outer member having a double row outer raceway formed integrally on an inner periphery and a wheel mounting flange for mounting a wheel at one end are integrated. A hub ring having a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring through a predetermined shimoshiro. An inner member in which a double row inner rolling surface facing the outer row rolling surface of the double row is formed, and rolling between the both rolling surfaces of the inner member and the outer member via a cage. A ring body in which an outer peripheral spline portion is formed on the end of the small-diameter step portion of the hub wheel, and the end portion of the small-diameter step portion is arranged in the radial direction. The ring body and the inner ring are secured to the small-diameter step portion by a caulking portion formed by plastic deformation outward. In the method of assembling the wheel bearing device assembled in this manner, when the caulking portion is processed, the inner periphery of the constraining ring formed in a concavo-convex shape that meshes with the outer periphery spline portion of the ring body is brought into external fitting contact. This prevents the ring body from expanding.

In this way, a crimped portion formed by externally fitting a ring body having an outer peripheral spline portion at the end portion of the small-diameter step portion of the hub wheel and plastically deforming the end portion of the small-diameter step portion radially outward. In the assembling method of the wheel bearing device in which the ring body and the inner ring are assembled with the small-diameter stepped portion being secured to the small-diameter step portion, when the caulking portion is processed, it is formed in an uneven shape that meshes with the outer periphery spline portion of the ring body Since the inner periphery of the restrained ring is contacted by external fitting to prevent the ring body from expanding, the expansion of the ring body during caulking is effectively suppressed, and the outer peripheral spline of the ring body is suppressed. The deformation of the part can be prevented.

An assembly device for a wheel bearing device according to the present invention integrally includes an outer member in which a double row outer rolling surface is integrally formed on an inner periphery, and a wheel mounting flange for attaching a wheel to one end. A hub ring formed with a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring via a predetermined shimoshiro, the double row on the outer periphery An inner member in which a double row inner rolling surface facing the outer rolling surface of the inner member is formed, and the inner member and the outer member are accommodated between the rolling surfaces of the inner member and the outer member via a cage. A ring body in which an outer peripheral spline portion is formed at an end portion of the small-diameter step portion of the hub wheel, and the end portion of the small-diameter step portion is radially outward. The ring body and inner ring are secured to the small diameter step by a crimped part formed by plastic deformation. In the assembling device of the wheel bearing device assembled in this manner, it comprises a restraining ring that externally contacts the outer peripheral spline portion of the ring body when the caulking portion is processed to prevent the ring body from expanding. The inner periphery of the restraining ring is formed in an uneven shape that meshes with the outer peripheral spline portion of the ring body.

It is a longitudinal section showing one embodiment of a wheel bearing device concerning the present invention. It is a longitudinal cross-sectional view which shows the assembly | attachment apparatus of the wheel bearing apparatus of FIG. (A) is a front view which shows the restraint ring which concerns on this invention, (b) is sectional drawing of (a), (c) is a principal part enlarged view which shows the tooth | gear part of the spline of (a). It is explanatory drawing which shows a crimping process. (A) is a principal part enlarged view which shows the contact state of the spline of FIG. 4, (b) is a principal part enlarged view which shows the modification of (a). It is a longitudinal cross-sectional view which shows the conventional wheel bearing apparatus.

An outer member that integrally has a vehicle body mounting flange for attaching to a knuckle on the outer periphery, and has a tapered double-row outer rolling surface integrally formed on the inner periphery, and a wheel on one end A hub wheel integrally having a wheel mounting flange for mounting a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and press-fitted into the small-diameter step portion of this hub ring via a predetermined shimiro, An inner member composed of a pair of inner rings having a tapered inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and between both rolling surfaces of the inner member and the outer member A ring body having an outer peripheral spline formed at the end of the small-diameter step portion of the hub wheel, and the small-diameter step. The rim is formed by a caulking portion formed by plastically deforming the end of the portion radially outward. In an assembly device for a wheel bearing device in which a ring body and an inner ring are fixed and assembled to the small-diameter stepped portion, the outer ring spline portion of the ring body comes into contact with the outer periphery when the caulking portion is processed. A constraining ring for preventing the ring body from expanding is provided, and a spline of the same specification is formed on the inner periphery of the constraining ring, and the inner periphery of the spline is directed toward the inner side. It is formed in a tapered shape that gradually decreases in diameter.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an embodiment of a wheel bearing device according to the present invention, FIG. 2 is a longitudinal sectional view showing an assembly device of the wheel bearing device of FIG. 1, and FIG. The front view which shows the restraint ring which concerns on invention, (b) is sectional drawing of (a), (c) is the principal part enlarged view which shows the tooth | gear part of the spline of (a), FIG. FIG. 5A is a main part enlarged view showing a contact state of the spline in FIG. 4, and FIG. 5B is a main part enlarged view showing a modification of FIG. In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outer side (left side in FIG. 1), and the side closer to the center is referred to as the inner side (right side in FIG. 1).

The wheel bearing device includes an inner member 1 and an outer member 2, and double-row

tapered rollers

3 and 3 accommodated between the members 1 and 2 so as to roll freely. The inner member 1 includes a hub ring 4 and a pair of

inner rings

5 and 7 plastically coupled to the hub ring 4. The hub wheel 4 integrally has a wheel mounting flange 6 for mounting a wheel (not shown) at an end portion on the outer side, and has a cylindrical shape that extends in the axial direction from the wheel mounting flange 6 to the outer periphery via a shoulder portion 4a. The small diameter step 4b is formed. Further, hub bolts 6 a for fixing the wheels at the circumferentially equidistant positions of the wheel mounting flange 6 are planted.

The pair of

inner rings

5 and 7 each have a tapered inner rolling surface 5a formed on the outer periphery, and are press-fitted into the small-diameter step portion 4b of the hub ring 4 via a predetermined squeeze. And the

large collar parts

5b and 7b for guiding the tapered roller 3 to the large diameter side of these inner side rolling surfaces 5a are formed, and the small collar part for preventing the tapered roller 3 from dropping off on the small diameter side. 5c and 7c are formed to constitute a back-to-back double row tapered roller bearing set in a state where the small end faces 5d and 7d (front end faces) of the

inner rings

5 and 7 are abutted with each other.

The outer member 2 integrally has a vehicle body mounting flange 2b to be attached to a knuckle (not shown) on the outer periphery, and is a tapered double row outer rolling

surface

2a, 2a opened outward on the inner periphery. Are integrally formed. The double-row

tapered rollers

3 and 3 are accommodated between the rolling surfaces via a cage 8 so as to freely roll. Further, an annular groove 9 is formed on the outer diameter surface fitted inside the knuckle, and an elastic ring 10 such as an O-ring is attached to the annular groove 9, thereby improving the airtightness of the fitting portion with the knuckle. be able to.

The hub wheel 4 is formed of medium-high carbon steel (carbon steel for SC system mechanical structure of JIS standard) containing carbon of 0.40 to 0.80 wt% such as S53C, and has a high frequency extending from the shoulder portion 4a to the small diameter step portion 4b. A predetermined hardened layer having a surface hardness in the range of 50 to 64 HRC is formed by quenching. Further, the

inner rings

5 and 7 and the tapered roller 3 are made of high carbon chrome bearing steel such as SUJ2, and are hardened in the range of 58 to 64 HRC to the core part by quenching. The caulking portion 11 described later is an unquenched portion with the surface hardness after forging. This facilitates caulking and prevents the occurrence of microcracks during processing, and has sufficient mechanical strength against the rotational bending load applied to the wheel mounting flange 6, and the durability of the hub wheel 4. Improves.

The outer member 2 is formed of medium-high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, similar to the hub wheel 4, and at least the double row

outer raceway surfaces

2a and 2a are formed on the surface by induction hardening. A predetermined curing process is performed in the range of 58 to 64 HRC.

Seals

12 and 12 are attached to the opening of the annular space formed between the outer member 2 and the

inner rings

5 and 7, leakage of the lubricating grease sealed inside the bearing, rainwater, dust, etc. from the outside Is prevented from entering the inside of the bearing. The seal 12 is constituted by a so-called pack seal composed of a slinger and an annular seal plate arranged to face each other.

In this embodiment, the rotational speed sensor 13 is inserted between the double row

outer rolling surfaces

2a, 2a of the outer member 2 into a sensor insertion hole 14 formed so as to penetrate in the radial direction. This rotational speed sensor 13 incorporates a magnetic detecting element such as a Hall element, a magnetoresistive element (MR element) or the like that changes its characteristics according to the flow direction of magnetic flux, and a waveform shaping circuit that adjusts the output waveform of this magnetic detecting element. The synthetic resin is integrally molded by injection molding. And it has the shaft-shaped insertion part 13a inserted in the sensor insertion hole 14, and the non-insertion part 13b located in the exterior of the outer member 2. As shown in FIG. An annular groove 15 is formed on the outer periphery of the insertion portion 13a, and an elastic ring 16 made of an O-ring or the like is attached to the annular groove 15. Moreover, the non-insertion part 13b is formed in the shape seated on the sensor attachment part 17 of the outer member 2, and is fastened via the attachment piece (not shown) extended to a side.

On the other hand, a pulsar ring 18 facing the rotational speed sensor 13 via a predetermined radial clearance (air gap) is fixed to the outer periphery of the inner ring 5. The pulsar ring 18 is formed in the shape of a spur gear composed of an uneven portion 18a. Thereby, the direction of the magnetic field alternately changes on the circumference along with the rotation of the hub wheel 4, and the rotational speed of the wheel can be detected via the rotational speed sensor 13.

The integration of the hub wheel 4 and the

inner rings

5 and 7 is achieved by pressing the pair of

inner rings

5 and 7 into the small-diameter step portion 4b of the hub wheel 4 through a predetermined shimiro and the end of the small-diameter step portion 4b with a diameter. This is performed by a caulking portion 11 formed by plastic deformation outward in the direction. Here, the double row tapered roller bearing in which the rolling element is composed of the tapered roller 3 is illustrated, but the wheel bearing device according to the present invention is not limited to this. For example, although not illustrated, a ball is used for the rolling element. It may be composed of double row angular contact ball bearings.

Further, on the inner periphery of the hub wheel 4, a shaft portion of an outer joint member constituting a constant velocity universal joint (not shown) is rotatably supported through rolling

bearings

19 and 20. Out of these rolling

bearings

19 and 20, the outer side rolling bearing 19 is a deep groove ball bearing, and the inner side rolling bearing 20 is a shell needle roller bearing.

A ring body (coupler ring) 21 that is a ring-shaped member is provided between the inner ring 7 on the inner side and the caulking portion 11 of the hub ring 4. The ring body 21 is fixed in contact with the large end surface 7 e of the inner ring 7. Both the inner peripheral surface and the outer peripheral surface of the ring body 21 are provided with spline portions, and the inner peripheral spline portion 21a is a hub formed on the outer peripheral surface on the inner side of the small-diameter step portion 4b of the hub wheel 4. The spline portion 22 is engaged. The ring body 21 is pressed toward the inner ring 7 by the crimping pressure from the crimping portion 11 that contacts the inner end face 21c, and the ring body 21 further passes through the inner ring 7 on the adjacent inner side. The inner ring 5 on the outer side is pressed toward the shoulder 4a. In this way, the ring body 21 and the pair of

inner ring members

5 and 7 are securely fixed to the hub ring 4 by the caulking pressure acting from the caulking portion 11.

An axle side spline portion 23 having the same diameter and the same shape as the outer peripheral spline portion 21 b of the ring body 21 is provided on the outer peripheral surface of the constant velocity universal joint in the vicinity of the ring body 21. The outer peripheral spline portion 21b and the axle side spline portion 23 are in a coaxial relationship with each other. The axle-side spline portion 23 meshes with an inner peripheral spline portion 24a of a gear ring 24 that can slide in the axial direction. When the gear ring 24 moves to the outer side, the gear ring 24 is engaged with both the axle-side spline portion 23 and the outer peripheral spline portion 21b, whereby the driving force of the constant velocity universal joint is transmitted to the hub wheel 4. On the other hand, when the gear ring 24 moves to the inner side, the gear ring 24 meshes with the axle side spline portion 23 but does not mesh with the outer peripheral spline portion 21b (not shown). In this way, the gear ring 24 is slid in the axial direction, so that the driving force to the hub wheel 4 can be switched intermittently. Although not particularly shown, the gear ring 24 is slid by a sliding mechanism using appropriate power means such as air or hydraulic pressure.

Next, a manufacturing method of the wheel bearing device, in particular, a procedure for attaching the ring body 21 to the small diameter step portion 4b of the hub wheel 4 will be described. FIG. 2 is a longitudinal sectional view showing an assembly device for a wheel bearing device.
In this caulking process, a hub ring 4 in which a pair of

inner rings

5 and 7 of a wheel bearing device and a ring body 21 are externally mounted is placed on a horizontal base 25 in a vertical shape, and the hub ring is mounted. 4, a caulking tool 26 provided on one end of the caulking tool 26 and the hub wheel 4, and a press drive device (operating the diameter enlarging preventing jig 27). (Not shown). This caulking process is performed by conventionally known swing caulking. That is, the hub ring 4 in which the

inner rings

5 and 7 of the wheel bearing device and the ring body 21 are externally fitted is placed on the horizontal base 25 with the axis O of the hub ring 4 in the vertical direction. Install. Then, the caulking tool 26 is approached from above the hub wheel 4, and the caulking tool 26 that is inclined at a predetermined angle with the axis O of the hub wheel 4 and rotates around the axis O is connected to one end of the hub wheel 4. The end portion of the small diameter step portion 4b of the hub wheel 4 is pressed and plastically deformed in the outer diameter direction to form the crimped portion 11. The plastically deformed caulking portion 11 is in close contact with and pressed against the outer surface of the ring body 21.

Then, when performing this caulking process, the constraining ring 28 of the diameter expansion preventing jig 27 provided in the assembling apparatus is brought into external contact with the outer peripheral surface of the ring body 21 to increase the diameter of the ring body 21 caused by the caulking process. To prevent. The diameter expansion prevention jig 27 is an annular block body that inserts an axially-shaped caulking tool 26 that is inclined and rotated at intervals, and an annular pressing jig 29 and the pressing jig. And a restraining ring 28 held by 29.

A pressing drive device is provided on the upper portion of the diameter expansion preventing jig 27, and a pressing member (not shown) is attached to the upper surface of the pressing jig 29 of the diameter expansion preventing jig 27. As shown by the arrow P, a downward pressing force is generated on the pressing jig 29. Therefore, when the pushing jig 29 is lowered by the operation of the pressing drive device, the restraining ring 28 is lowered. When the restraining ring 28 comes into contact with the ring body 21 externally fitted to the hub wheel 4, a downward pressing force acts on the pressing jig 29 as shown by an arrow P by the action of the pressing drive device. The restraining ring 28 can press the ring body 21 downward in the vertical direction and can be tightened radially inward by the pressing force. The press drive device can use, for example, hydraulic pressure as a drive source.

Here, in this embodiment, as shown in FIGS. 3A and 3B, the restraining ring 28 is formed in a single annular shape, and the inner periphery thereof is the same as the outer peripheral spline portion 21 b of the ring body 21. A spline 30 having an uneven shape is formed. Thereby, the ring body 21 can be restrained by an axial load, handling can be simplified, and downsizing of the facility becomes possible. The spline 30 is formed in a tapered shape that comes into contact with the outer peripheral spline portion 21b of the ring body 21 and gradually decreases in diameter toward the inner side. Further, as shown in an enlarged view in (c), the spline 30 is composed of a rectangular uneven tooth surface having a large diameter surface 30a and a small diameter surface 30b.

Then, as shown in FIG. 4, when the caulking process is performed, the restraining ring 28 held by the pushing jig 29 is externally brought into contact with the ring body 21. The spline 30 meshes with the outer peripheral spline portion 21 b of the ring body 21. In this case, since the spline 30 of the constraining ring 28 is formed in a taper shape, the end of the ring body 21 on the inner side, that is, the location where the hoop stress is generated by caulking (the upper portion of the caulking bending) is effectively obtained. Can be restrained. Accordingly, the expansion of the ring body 21 during the caulking process is effectively suppressed, and the splines are in contact with each other, so that the deformation of the outer peripheral spline portion 21b of the ring body 21 can be reliably prevented.

In spline contact between the spline 30 of the restraining ring 28 and the outer peripheral spline portion 21b of the ring body 21, both the large diameter surface 30a and the small diameter surface 30b of the spline 30 are connected to the ring body 21 as shown in FIG. By contacting the outer peripheral spline portion 21b, deformation of the outer peripheral spline portion 21b can be reliably prevented, and expansion of the ring body 21 during caulking can be effectively suppressed.

On the other hand, even when both the large-diameter surface 30a and the small-diameter surface 30b of the spline 30 cannot be brought into contact with the outer peripheral spline portion 21b of the ring body 21, as shown in FIG. By bringing the surface 30b into contact, the expansion of the ring body 21 can be minimized.

The embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment, and is merely an example, and various modifications can be made without departing from the scope of the present invention. Of course, the scope of the present invention is indicated by the description of the scope of claims, and further, the equivalent meanings described in the scope of claims and all modifications within the scope of the scope of the present invention are included. Including.

In the wheel bearing device according to the present invention, a ring body (coupler ring) that selectively switches between four wheels and two wheels is fixed to an inner member having a hub wheel and an inner ring fitted to the hub wheel. The present invention can be applied to the wheel bearing device having the first to third generation structures.

DESCRIPTION OF SYMBOLS 1 Inner member 2 Outer member 2a Outer rolling surface 2b Car body mounting flange 3 Tapered roller 4 Hub wheel 4a Shoulder part 4b Small

diameter step part

5, 7 Inner ring 5a

Inner rolling surface

5b, 7b

Large collar part

5c,

7c

5d, 7d Small end face 6 Wheel mounting flange 6a Hub bolt 8 Cage 9, 15

Annular groove

10, 16 Elastic ring 11 Clamping part 12 Seal 13 Rotational speed sensor

13a Insertion part

13b Non-insertion part 14 Sensor insertion hole 17 Sensor attachment part 18 Pulsar ring 18a Concavity and

convexity parts

19, 20 Rolling bearing 21

Ring bodies

21a, 24a Inner peripheral spline part 21b Outer peripheral spline part 21c Inner side end face 22 Hub spline part 23 Axle side spline part 24 Gear ring 25 Base 26 Caulking Tool 27 Expansion preventing jig 28 Restraint ring 29 Push jig 30 Restraint ring spline 30a Spline Diameter surface 30b Small diameter surface 50 of spline Wheel bearing device 51 with clutch function Hub wheel 51a Outer end portion 52 Shaft portion 53 Double row tapered roller bearing 54 Ring body 55 Inner ring member 56 Outer ring member 57 Tapered roller 58 Flange portion 59 Caulking Tool 60 Base 61 Annular base 62 Guide block 63 Restraint ring A Diameter expansion prevention jig O Hub ring axis P Pressing force

Claims

An outer member in which a double row outer rolling surface is integrally formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange for mounting a wheel at one end portion and having a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and a predetermined squeeze through a small-diameter step portion of the hub wheel An inner member formed of at least one inner ring press-fitted and formed with a double-row inner raceway facing the outer row of the double-row on the outer periphery;
A double row rolling element that is accommodated so as to roll freely between the rolling surfaces of the inner member and the outer member via a cage,
A ring body in which an outer peripheral spline portion is formed is fitted to an end portion of the small-diameter step portion of the hub wheel, and the end portion of the small-diameter step portion is plastically deformed radially outward to form the above-mentioned In the assembling device of the wheel bearing device in which the ring body and the inner ring are assembled while being fixed to the small diameter stepped portion,
When the caulking portion is machined, it includes a restraining ring that externally contacts the outer ring spline portion of the ring body to prevent the ring body from expanding, and the inner circumference of the restraint ring is the outer circumference of the ring body. An assembly device for a wheel bearing device, wherein the assembly device is formed in an uneven shape meshing with a spline portion.
The assembly device for a wheel bearing device according to claim 1, wherein a spline having the same specifications as the outer peripheral spline portion of the ring body is formed on an inner periphery of the restraining ring.
The assembly apparatus for a wheel bearing device according to claim 1 or 2, wherein the inner periphery of the restraining ring is formed in a tapered shape that gradually decreases in diameter toward the inner side.
The assembly apparatus for a wheel bearing device according to any one of claims 1 to 3, wherein at least a small-diameter surface of the concave and convex large-diameter surface and small-diameter surface of the restraining ring is in contact with an outer peripheral spline portion of the ring body.
The assembly apparatus for a wheel bearing device according to any one of claims 1 to 4, wherein the restraining ring is formed in a single annular shape.
An outer joint member constituting a constant velocity universal joint is coupled to the inner member, and an axle side spline portion having the same diameter and shape as the outer periphery spline portion of the ring body is formed on the outer peripheral surface of the outer joint member. In addition, the outer peripheral spline part and the axle side spline part are arranged coaxially with each other, and the inner side spline part of the drive switching gear ring slidable in the axial direction is meshed with the axle side spline part. The assembly | attachment apparatus of the wheel bearing apparatus of claim | item 1.
An outer member in which a double row outer rolling surface is integrally formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange for mounting a wheel at one end portion and having a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and a predetermined squeeze through a small-diameter step portion of the hub wheel An inner member formed of at least one inner ring press-fitted and formed with a double-row inner raceway facing the outer row of the double-row on the outer periphery;
A double row rolling element that is accommodated so as to roll freely between the rolling surfaces of the inner member and the outer member via a cage,
A ring body in which an outer peripheral spline portion is formed is externally fitted to the end portion of the small-diameter step portion of the hub wheel, and the end portion of the small-diameter step portion is plastically deformed radially outward to form the above-mentioned In the method of assembling the wheel bearing device in which the ring body and the inner ring are assembled with the small-diameter stepped portion being secured to the small diameter step,
When the caulking portion is processed, the inner periphery of the constraining ring formed in a concavo-convex shape meshing with the outer peripheral spline portion of the ring body is brought into contact with the outer periphery to prevent the ring body from expanding in diameter. A method of assembling a wheel bearing device as a feature.