JP2005280567A - Bearing device for wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel capable of reducing the number of working steps, reducing cost and easily realizing a light weight and compact size. <P>SOLUTION: This bearing device for a wheel comprises an outer member 4 having a vehicle body fixing flange 4b fixed to a knuckle and formed with a plurality of rows of outer running surfaces 4a at the inner circumference, a hub ring 1 having integrally a wheel fixing flange 6 at one end and formed with an inner running surface 1a and a small diameter step 7, an inner wheel 10 press fitted to the small diameter step 7 of the hub ring 1 and a plurality of rows of rollers 5 rotatably stored between both running surfaces, wherein the small diameter step 7 is plastically deformed to form a caulking part 8 and the inner wheel 10 is axially fixed by the caulking part 8. A pilot member 18 having a cylindrical part 18a internally fitted to the knuckle is integrally fixed to the end part of the outer member 4 and at the same time a pulser ring 16 is outwardly fitted to the outer diameter of the inner wheel 10 and the sensor 19 is correspondingly fixed to the pilot member 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wheel bearing device for rotatably supporting a wheel of an automobile or the like with respect to a suspension device, and more particularly to a wheel bearing device having a built-in rotation speed detection device for detecting the rotation speed of a wheel.

  FIG. 4 is an example of a wheel bearing device used in an automobile, and shows a structural example used on the driven wheel side. The wheel bearing device is supported and fixed to a suspension device (not shown), and is inserted into the outer member 51 serving as a fixing member and the outer member 51 via double-row rolling elements (balls) 53 and 53. The outer member 51 is integrally provided with a vehicle body mounting flange 51b on the outer periphery, and double-row outer rolling surfaces 51a and 51a are formed on the inner periphery.

  On the other hand, the inner member 52 is formed with double-row inner rolling surfaces 55a and 56a facing the outer rolling surfaces 51a and 51a of the outer member 51 described above. Of these double-row inner rolling surfaces 55a, 56a, one inner rolling surface 55a is integrally formed on the outer periphery of the hub wheel 55, and the other inner rolling surface 56a extends from the inner rolling surface 55a of the hub wheel 55. It is formed on the outer periphery of an inner ring 56 that is press-fitted into a cylindrical small-diameter step portion 55b extending in the axial direction. And the double row rolling elements 53 and 53 are accommodated between these both rolling surfaces, respectively, and are hold | maintained by the holder | retainers 57 and 57 so that rolling is possible.

  The hub wheel 55 integrally has a wheel mounting flange 54 for mounting a wheel (not shown) on the outer periphery, and a crimped portion 58 is formed by plastically deforming the end portion of the small diameter step portion 55b radially outward. Has been. The inner ring 56 is fixed in the axial direction by the caulking portion 58. The inner member 52 refers to the hub ring 55 and the inner ring 56. A seal 59 is attached to the end of the outer member 51 to prevent leakage of lubricating grease sealed inside the bearing and intrusion of rainwater, dust, or the like into the bearing from the outside.

  An encoder 60 is press-fitted into the outer diameter of the inner ring 56. The encoder 60 includes a support ring 61 formed in an annular shape with an L-shaped cross section by a magnetic metal plate, and an encoder body 62 attached to a side surface of the support ring 61. The encoder body 62 is made of a permanent magnet such as rubber mixed with ferrite powder, and S poles and N poles are alternately magnetized at equal intervals in the circumferential direction.

  A cylindrical cover 63 with a bottom is fitted and fixed to the opening end of the outer member 51 on the inboard side, and the opening of the outer member 51 is closed. The cover 63 includes a bottomed cylindrical cover body 64 formed by injection molding synthetic resin, and a fitting cylinder 65 coupled to an opening of the cover body 64. The fitting cylinder 65 is formed in an annular shape having an L-shaped cross section by press forming a stainless steel plate having corrosion resistance. The cover body 64 is integrated with the cover body 64 by molding at the time of injection molding.

  A protrusion 66 protruding in the axial direction is formed on the radially outer portion of the cover main body 64, and an insertion hole 67 is formed in the protrusion 66 at a position corresponding to the encoder 60. A holder in which a sensor (not shown) is embedded is inserted into the insertion hole 67 through a blind plug 68. This holder is composed of a magnetic detection element that changes its characteristics according to the flow direction of magnetic flux, such as a Hall element, a magnetoresistive element (MR element), and an IC that incorporates a waveform shaping circuit that adjusts the output waveform of this magnetic detection element. Thus, an antilock brake system (ABS) for an automobile that controls the rotational speed of the wheel by detecting the rotational speed of the wheel is configured.

In such a wheel bearing device, the outer member 51 has a pilot portion 69 formed on the outer periphery thereof, is fitted into a knuckle N constituting the suspension device, and is not shown in a female screw 70 formed on the vehicle body mounting flange 51b. It is fixed to the knuckle N by screwing a fixing bolt.
JP 2001-318105 A

  In such a conventional wheel bearing device, not only the cost reduction, but also the requirements for lighter and more compact devices are severe. However, in this type of conventional wheel bearing device, since the pilot portion 69 is integrally formed on the outer periphery of the outer member 51, it is necessary to provide a pilot portion 69 for being fitted inside the knuckle N and to perform machining. There is. Therefore, not only is the processing man-hour required and the cost reduction is hindered, but there is a limit to achieving a light weight and a compact size even if the excess thickness is restricted and slimmed down.

  The present invention has been made in view of such a conventional problem. A wheel bearing device that can reduce the number of processed outer members to reduce the cost and can easily realize light weight and compactness. The purpose is to provide.

  In order to achieve such an object, the invention described in claim 1 of the present invention has a vehicle body mounting flange integrally fixed to a knuckle that constitutes a suspension device on the outer periphery, and double row outward rotation on the inner periphery. It consists of an outer member formed with a running surface, a hub wheel integrally having a wheel mounting flange for mounting a wheel at one end, and an inner ring press-fitted into the hub wheel. An inner member formed with an inner rolling surface opposed to the running surface, and a double row rolling element accommodated in a freely rolling manner between the respective rolling surfaces of the outer member and the inner member. In the wheel bearing device, the cylindrical guide portion fitted into the knuckle is a separate member from the outer member, and is integrally fixed to an end portion on the axially inner side of the outer member. Adopted the configuration.

  As described above, the cylindrical guide portion fitted into the knuckle is a separate member from the outer member, and is integrally fixed to the end portion on the axially inner side of the outer member. The number of forging or cutting of the outer member can be reduced, the cost can be reduced, and the device can be reduced in weight and size.

  Further, the pilot member may be formed by press forming a steel plate as in the invention described in claim 2.

  Moreover, like invention of Claim 3, you may form in the shape of a cup with a bottom so that the opening edge part of the said outward member may be obstruct | occluded. Thereby, the seal of the bearing portion can be abolished, the cost can be reduced by reducing the number of parts, and the device can be reduced in weight and size.

  In the invention according to claim 4, since the pulsar ring is externally fitted to the outer diameter of the inner ring and the sensor is fixed to the pilot member corresponding to the pulsar ring, the pilot member is also used as a sensor cap. Therefore, it is possible to provide a compact wheel bearing device in which a rotation speed detection device for detecting the rotation speed of the wheel is incorporated.

  In the invention according to claim 5, an inner rolling surface and a cylindrical small-diameter step portion extending in an axial direction from the inner rolling surface are formed on the outer periphery of the hub wheel, and the inner ring is formed on the small-diameter step portion. Is press-fitted, and the end portion of the small diameter step portion is plastically deformed radially outward to form a caulking portion, and the inner ring is fixed to the hub wheel in the axial direction by the caulking portion. Because there is no need to control the preload by tightening the inner ring firmly with a nut or the like as in the past, it is possible to simplify the incorporation into the vehicle and maintain the preload for a long period of time. Can do. In addition, the number of parts can be greatly reduced, and in combination with the improvement of the embedding property, it is possible to achieve low cost, light weight and compactness.

  A wheel bearing device according to the present invention has a vehicle body mounting flange integrally fixed to a knuckle constituting a suspension device on an outer periphery, and an outer member having a double row outer rolling surface formed on an inner periphery. A hub ring integrally having a wheel mounting flange for mounting a wheel at one end, and an inner ring press-fitted into the hub ring, and an inner rolling surface facing the outer rolling surface of the double row on the outer periphery. A wheel bearing device comprising: a formed inner member; and a double-row rolling element that is rotatably accommodated between the rolling surfaces of the outer member and the inner member. Since the cylindrical guide portion to be fitted is a member separate from the outer member and is integrally fixed to the end portion on the axially inner side of the outer member, at least the outer member is forged. Alternatively, the number of cutting steps can be reduced and the cost can be reduced. , It is possible to reduce the weight and size of the apparatus.

  An outer member integrally having a vehicle body mounting flange for fixing to a knuckle that constitutes a suspension device on the outer periphery, and a wheel for mounting a wheel on one end of the outer member having a double row outer rolling surface formed on the inner periphery A hub ring having an integral mounting flange, one inner rolling surface corresponding to the double row outer rolling surface, and a cylindrical small-diameter stepped portion extending in the axial direction from the inner rolling surface; An inner member composed of an inner ring press-fitted into the small-diameter step portion, and a double-row rolling element accommodated in a freely rolling manner between the rolling surfaces of the outer member and the inner member, In the wheel bearing device in which the end portion of the small diameter step portion is plastically deformed radially outward to form a crimped portion, and the inner ring is fixed in the axial direction with respect to the hub wheel by the crimped portion. A pilot member having a cylindrical portion fitted into the knuckle is disposed in the axial direction of the outer member. While being integrally fixed to an end portion of the inner side, the pulsar ring to the outer diameter of the inner ring is fitted, the sensor corresponding to the pulsar ring is fixed to said pilot member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention. In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outboard side (left side in the drawing), and the side closer to the center is referred to as the inboard side (right side in the drawing).

  This wheel bearing device is a wheel bearing device that rotatably supports a driven wheel, and is configured by unitizing a hub wheel 1 and a double row rolling bearing 2. The double row rolling bearing 2 includes an inner member 3, an outer member 4, and double row rolling elements (balls) 5, 5 accommodated between the members 3, 4 so as to be freely rollable.

  Here, the inner member 3 refers to the hub wheel 1 and the inner ring 10 press-fitted into the hub wheel 1. The hub wheel 1 integrally has a wheel mounting flange 6 for mounting a wheel (not shown) at an end on the outer board side of the outer periphery, and the wheel is fastened at a circumferentially equidistant position of the wheel mounting flange 6. A hub bolt 6a is installed. A cylindrical small-diameter step portion 7 extending in the axial direction from the wheel mounting flange 6 toward the inboard side is formed, and an inner ring 10 is press-fitted into the small-diameter step portion 7 through a predetermined shimiro. And the crimping part 8 is formed by plastically deforming the edge part of the small diameter step part 7 to radial direction outward. The inner ring 10 is fixed in the axial direction with respect to the hub wheel 1 by the caulking portion 8 to form a so-called third generation self-retained structure. Therefore, it is not necessary to tightly tighten the inner ring with a nut or the like as in the prior art to manage the preload amount, so that the ease of incorporation into the vehicle can be simplified and the preload amount can be maintained for a long time. In addition, the number of parts can be greatly reduced, and in combination with the improvement of incorporation, low cost, light weight and compactness can be achieved.

  On the other hand, the outer member 4 integrally has a vehicle body mounting flange 4b fixed to the knuckle N constituting the suspension device on the outer periphery, and double row outer rolling surfaces 4a and 4a are formed on the inner periphery. Of the inner rolling surfaces of the inner member 3 facing the outer rolling surfaces 4a, 4a of the outer member 4, one inner rolling surface 1a is the hub wheel 1, and the other inner rolling surface 10a is the inner ring 10. Are formed on the outer peripheral surface of each. The double row rolling bearing 2 holds the double row rolling elements 5 and 5 accommodated between the rolling surfaces 4a, 1a and 4a and 10a, and the double row rolling elements 5 and 5 so as to roll freely. The retainer 11 is provided.

  Seals 12 and 13 are attached to both ends of the outer member 4 to seal the annular space between the outer member 4 and the inner member 3. The seals 12 and 13 prevent the leakage of the lubricating grease sealed inside the bearing and the entry of rainwater, dust, etc. from the outside into the bearing.

  The hub wheel 1 is made of medium carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and the surface hardness is increased by induction hardening on the inboard side base portion and the small diameter step portion 7 of the wheel mounting flange 6. It is cured in the range of 54 to 64 HRC. The caulking portion 8 is an unquenched portion having a material surface hardness of 24 HRC or less after forging. Thereby, the durability of the hub wheel 1 is improved. In addition, the workability when plastically deforming the caulking portion 8 is improved, and the occurrence of cracks and the like during processing is prevented, and the reliability of the quality is improved.

  Similarly to the hub wheel 1, the outer member 4 is formed of medium carbon steel containing carbon of 0.40 to 0.80 wt% such as S53C, and the double row outer raceway surfaces 4a and 4a and the seals 12 and 13 are formed. And the surface hardness is hardened in the range of 54 to 64 HRC by induction hardening on the inner peripheral surface of the end portion where the pilot member 9 described later is mounted. On the other hand, the inner ring 10 is made of a high carbon chrome bearing steel such as SUJ2, and is hardened in the range of 54 to 64 HRC to the core portion by quenching. Here, as the double row rolling bearing 2, a double row angular contact ball bearing using the rolling elements 5, 5 as a ball is illustrated, but not limited to this, a double row tapered roller bearing using a tapered roller as the rolling element. There may be. In addition, a so-called third generation structure is illustrated, but a so-called second generation structure in which a pair of inner rings are press-fitted into a hub ring may be used. That is, the configuration of the bearing is not limited as long as the outer member has a vehicle body mounting flange.

  Usually, a pilot portion that is integrally formed on the outer periphery of the outer member and fitted into the knuckle is provided, but in this embodiment, instead of this, a separate member is provided at the end portion on the inboard side of the outer member 4. A cylindrical pilot member 9 is internally fitted. The pilot member 9 includes a cylindrical portion 9a that is press-fitted into the outer member 4 via a predetermined scissors, and a flange portion 9b that extends radially inward from the cylindrical portion 9a. An austenitic stainless steel rod (JIS) Standard SUS304 or the like), or cold-rolled steel sheet (JIS standard SPCC or the like) that has been rust-proofed is press-molded to form a substantially L-shaped cross-section. Here, since the flange portion 9b is in close contact with and in contact with the open end portion 4c of the outer member 4, the rigidity of the pilot member 9 is further increased in combination with the L-shaped cross section.

  Thus, by changing the pilot part of the outer member 4 to the separate pilot member 9, the forging or cutting man-hours can be reduced, the cost can be reduced, and the weight and size can be reduced. it can. Although not shown, a labyrinth seal can be formed between the inner ring 10 and the inner ring 10 by extending the flange portion 9b of the pilot member 9 inward and confronting the inner ring 10 with a predetermined minute clearance. . As a result, the inboard-side seal 13 can be eliminated, and the cost can be further reduced by reducing the number of parts, and the weight and size can be reduced.

  FIG. 2 is a longitudinal sectional view showing a second embodiment of the wheel bearing according to the present invention. In this embodiment, only the configuration of the pilot member is different from the above-described embodiment, and the same reference numerals are given to the same parts of the same parts, and the detailed description thereof is omitted.

  This wheel bearing is configured by unitizing a hub wheel 1 and a double row rolling bearing 2. Among these, the double-row rolling bearing 2 includes an inner member 3, an outer member 14, and double-row rolling elements 5, 5 accommodated between the members 3, 14 so as to roll freely. Here, a cylindrical pilot member 15 is fitted into the end of the outer member 14 on the inboard side. The pilot member 15 includes a cylindrical portion 15a that is press-fitted into the outer member 14 via a predetermined scissors, and a bottom portion 15b that extends radially inward from the cylindrical portion 15a. The pilot member 15 is formed in a cup shape by press-forming an austenitic stainless steel plate (JIS standard SUS304 type or the like) or a rust-proof cold rolled steel plate (JIS standard SPCC type or the like). ing.

  In the present embodiment, the seal on the inboard side can be abolished, and the forging or cutting man-hour of the outer member 14 can be reduced, the cost can be reduced, and the weight can be reduced as in the above-described embodiment.・ Compact size can be achieved. In this example, the pilot member 15 is made of metal. However, the present invention is not limited to this. For example, a synthetic resin such as polyamide (PA) 66, polypropylene (PP), or polyethylene terephthalate (PET) is formed by injection molding. It may be what was done. As a result, mass productivity can be further improved, and cost and weight can be reduced.

  FIG. 3 is a longitudinal sectional view showing a third embodiment of the wheel bearing according to the present invention. In this embodiment, only the configuration of the pilot member is different from the above-described embodiment, and the same reference numerals are given to the same parts of the same parts, and the detailed description thereof is omitted.

  In the present embodiment, the pulsar ring 16 is press-fitted into the outer diameter of the inner ring 10. The pulsar ring 16 includes a cylindrical fitting portion 16a and a cylindrical large-diameter step portion 16b extending in the axial direction from the fitting portion 16a, and is made of a ferromagnetic steel plate, for example, ferritic stainless steel. Steel plates (JIS standard SUS430 series, etc.) and cold rolled steel plates (JIS standard SPCC series, etc.) are formed by press working. And the uneven | corrugated | grooved part 17 is formed in the circumferential direction equal distribution on the outer periphery of the large diameter step part 16b.

  Here, a cylindrical pilot member 18 is fitted into the end of the outer member 14 on the inboard side. The pilot member 18 includes a cylindrical portion 18a that is press-fitted into the outer member 14 through a predetermined squeeze, and a bottom portion 18b that extends radially inward from the cylindrical portion 18a. The pilot member 18 is formed into a cup shape by press-forming an austenitic stainless steel plate (JIS standard SUS304 type or the like) or a rust-proof cold rolled steel plate (JIS standard SPCC type or the like). Is formed.

  A sensor 19 is disposed opposite to the position corresponding to the concavo-convex portion 17 of the pulsar ring 16. This sensor 19 is a Hall element, a magnetoresistive element (MR element), etc., a magnetic detection element that changes its characteristics in accordance with the flow direction of magnetic flux, and an IC that incorporates a waveform shaping circuit that adjusts the output waveform of this magnetic detection element. And the rotational speed of the wheel is detected by a change in magnetic flux around the concavo-convex portion 17 as the inner ring 10 rotates. Reference numeral 20 denotes a harness for transmitting a signal output as a waveform shaped from the IC to a controller (not shown), and is connected to the sensor 19 via the bottom 18b of the pilot member 18 without using a connector or the like.

  Such a rotational speed detector is not limited to the pulsar ring 18 having the concavo-convex portion 17, and may be a magnetic encoder made of a permanent magnet such as rubber mixed with ferrite powder. In this case, the magnetic encoder is alternately magnetized with S poles and N poles at equal intervals in the circumferential direction.

  In the case of the present embodiment, as in the second embodiment (FIG. 2) described above, the seal on the inboard side can be abolished, and the forging or cutting man-hours of the outer member 14 can be reduced, resulting in cost reduction. It is possible to reduce the weight and size. Furthermore, since the pilot member 18 also serves as a sensor cap, it is possible to provide a compact wheel bearing device with a built-in rotation speed detection device that detects the rotation speed of the wheel.

  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.

  The wheel bearing device according to the present invention can be applied to an inner ring rotating type wheel bearing device of any structure such as a driving wheel, a driven wheel, or a rolling element having a ball, a tapered roller or the like.

It is a longitudinal section showing a 1st embodiment of a bearing device for wheels concerning the present invention. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the wheel bearing which concerns on this invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the wheel bearing which concerns on this invention. It is a longitudinal cross-sectional view which shows the conventional wheel bearing apparatus.

Explanation of symbols

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub wheel 1a, 10a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rolling surface 2 ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ Double-row rolling bearings 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner members 4, 14 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Outer member 4a ·········· Outside rolling surface 4b ··············· Body mounting flange 4c・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Open end 5 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling body 6 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ Wheel mounting flange 6a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub bolt 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Small diameter step 8 ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Clamping parts 9, 15, 18 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pilot members 9a, 15a, 18a・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cylindrical part 9b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Human part 10 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner ring 11 ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ Cage 12, 13 ・ ・ ・ ・ ・ ・ ・ ・ Seal 15b, 18b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Bottom 16 ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ Pulsar ring 16a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fitting part 16b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ Large diameter step 17 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Uneven portion 19 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Sensor 20 ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ Harness 51 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer member 51a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer rolling surface 51b ... Body mounting flange 52 ...・ Inner member 53 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling element 54 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel mounting flange 55 ・ ・ ・ ・ ・ ・............ Hub wheels 55a, 56a ......... Inner rolling surface 55b ......... Small diameter step 56・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner ring 57 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Retainer 58 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・... Casting part 59 ... Seal 60 ... Encoder 61 ...・ ・ ・ ・ ・ ・ ・ ・ ・ Supporting ring 62 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Encoder main body 63 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cover 64 ... Cover body 65 ... Fit Joint tube 66 ... Projection 67 ... Insertion hole 68 ... ······································· 69 ··············knuckle

Claims (5)

An outer member integrally having a vehicle body mounting flange for fixing to a knuckle that constitutes a suspension device on the outer periphery, and a double row outer rolling surface formed on the inner periphery;
It consists of a hub wheel integrally having a wheel mounting flange for mounting a wheel at one end, and an inner ring press-fitted into the hub wheel, and an inner rolling surface facing the double-row outer rolling surface is formed on the outer periphery. The inner member made,
In a wheel bearing device comprising a double row rolling element housed in a freely rolling manner between the rolling surfaces of the outer member and the inner member,
The cylindrical guide portion fitted inside the knuckle is a member separate from the outer member, and is integrally fixed to an end portion on the axially inner side of the outer member. Wheel bearing device.   The wheel bearing device according to claim 1, wherein the pilot member is formed by press forming a steel plate.   The wheel bearing device according to claim 1 or 2, wherein the pilot member is formed in a cup shape with a bottom so as to close an opening end portion of the outer member.   4. The wheel bearing device according to claim 1, wherein a pulsar ring is fitted on an outer diameter of the inner ring, and a sensor is fixed to the pilot member corresponding to the pulsar ring. 5.   An inner rolling surface and a cylindrical small-diameter step portion extending in an axial direction from the inner rolling surface are formed on the outer periphery of the hub wheel, and the inner ring is press-fitted into the small-diameter step portion, and the small-diameter step portion 5. The caulking portion is formed by plastically deforming an end portion radially outward, and the inner ring is fixed to the hub wheel in the axial direction by the caulking portion. Wheel bearing device.

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