JP2007045306A - Machining method of wheel bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the accuracy of a bearing part from having an influence on that of a hub ring flange after machining when cutting a hub ring flange surface on which a brake rotor of a wheel bearing device with the brake rotor is mounted. <P>SOLUTION: A wheel pilot end face 23 of a hub ring 20A is cut on the basis of an inner ring abutting surface 25 or a raceway track 32 by a simple body of the hub ring 20A. An outer member 10, an inner member 20, and a rolling element 36 are assembled, and a flange surface 29 of a wheel mounting flange 28 of the hub ring 20A is cut on the basis of the wheel pilot end face 23 of the hub ring 20A. Alternatively, an outer peripheral surface (outer diameter and raceway track) of the hub ring 20A is cut on the basis of the wheel pilot end face 23 of the hub ring 20A by the simple body of the hub ring 20A. The outer member 10, the inner member 20, and the rolling element 36 are assembled, and the flange surface 29 of the wheel mounting flange 28 of the hub ring 20A is cut on the basis of the wheel pilot end face 23 of the hub ring 20A. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a processing method of a wheel bearing device, and more particularly to a method of cutting a brake rotor mounting surface of a wheel mounting flange of a hub wheel.

  There are two types of wheel bearing devices for automobiles, one for driving wheels and one for non-driving wheels. In any case, in the wheel bearing device, since the run-out of the braking surface, that is, the pad sliding surface during rotation of the brake rotor causes the occurrence of brake judder during braking, high processing is required for each component of the wheel bearing device. High accuracy and high dimensional accuracy are required. However, even if the machining accuracy of each part is increased, the machining error of each part is not only accumulated during the assembly of the wheel bearing device, but also an assembly error occurs. Can not do it.

  In order to eliminate such inconvenience, a wheel bearing device with a brake rotor assembled in a mounted state is mounted on a cutting machine, and the brake rotor is rotated while the wheel bearing device with a brake rotor is supported in the mounted state to pad. A cutting method for cutting the sliding surface has already been proposed (US Pat. No. 6,247,219).

According to the above conventional method, since the pad sliding surface of the brake rotor is cut in the mounted state of the wheel bearing device with the brake rotor, the integration error in which the processing errors of each component are accumulated, the distortion generated when the brake rotor is fixed, etc. Is removed by cutting. Therefore, by assembling the wheel bearing device with brake after completion of cutting into the actual vehicle, the wheel bearing device with brake rotor is restored to the state at the end of cutting, and the runout of the pad sliding surface when the brake rotor rotates is It is extremely small and the brake rotor can be rotated with extremely high accuracy.
US Pat. No. 6,415,508

  The conventional machining method that cuts the pad sliding surface of the brake rotor while the wheel bearing device with the brake rotor is mounted suppresses the runout of the pad sliding surface during rotation of the brake rotor and generates vibration during braking. Brake rotor assembled to the inner member in a state in which the outer member is fixed out of the outer member and the inner member that rotate relative to each other through the rolling element. The pad sliding surface is cut, and the rolling contact surface is deformed by deformation of the rolling element contact surface when a cutting load is applied. As a result, the surface runout accuracy deteriorates accordingly. If it demonstrates with reference to FIG. 7, the outer member 2 will be chucked and the flange surface 8 of the hub wheel 6 will be turned by using the flange surface 4 of the outer member 2 as a reference surface. For this reason, the accuracy of the bearing itself (axial runout, rigidity, etc.) affects the hub ring flange accuracy after processing.

  An object of the present invention is to prevent the accuracy (axial runout, rigidity, etc.) of the bearing portion from affecting the hub wheel flange accuracy after processing.

  The present invention comprises an outer member having a vehicle body mounting flange on the outer periphery and two rows of tracks on the inner periphery, a hub wheel having a wheel mounting flange on the outer periphery, and an inner ring disposed in a small diameter portion of the hub wheel. A wheel mounting flange surface of a wheel bearing device including a member and two rows of rolling elements that are interposed between a raceway of the outer member and a raceway of the inner member so as to be relatively rotatable is cut. A method of turning a wheel pilot end face of a hub ring with a single hub ring, assembling an outer member, an inner member, and a rolling element, and a brake rotor of a wheel mounting flange of the hub ring based on the wheel pilot end face of the hub ring. The mounting surface is turned.

  When turning the wheel pilot end face of the hub wheel, the inner ring abutment surface of the hub wheel as in the first aspect of the invention or the raceway of the hub ring as in the second aspect of the invention is used as a reference.

  The invention of claim 3 comprises an outer member having a vehicle body mounting flange on the outer periphery and two rows of tracks on the inner periphery, a hub wheel having a wheel mounting flange on the outer periphery, and an inner ring disposed in a small diameter portion of the hub wheel. A wheel mounting flange surface of a wheel bearing device comprising: an inner member, and two rows of rolling elements that are interposed between a raceway of the outer member and a raceway of the inner member so as to be relatively rotatable. This is a cutting method, and the hub wheel itself is ground on the basis of the wheel pilot end surface of the hub wheel, the outer surface of the hub wheel is ground, the outer member, the inner member and the rolling element are assembled, and the wheel pilot end surface of the hub wheel is assembled. The brake rotor mounting surface of the wheel mounting flange of the hub wheel is turned as a reference.

  The chuck position when turning the brake rotor mounting surface of the wheel mounting flange of the hub wheel includes the wheel pilot outer diameter of the hub wheel (Claim 4), the wheel pilot inner diameter of the hub wheel (Claim 5), and the serration of the hub ring. The inner diameter of the hole (Claim 6) and the outer diameter of the wheel mounting flange of the hub wheel (Claim 7) can be mentioned.

  Turning the brake rotor mounting surface of the wheel mounting flange of the hub wheel on the basis of the wheel pilot end surface of the hub wheel enables high-accuracy processing with reduced surface runout without restraining the outer member. As a specific example, the runout of the flange surface can be 10 μm or less.

  Therefore, according to the present invention, the rotational runout of the brake rotor mounting surface of the wheel mounting flange of the hub wheel and hence the pad sliding surface of the brake rotor can be extremely reduced, and the rotational accuracy of the brake rotor in the mounted state And the occurrence of brake judder during braking can be suppressed.

  First, before explaining a processing method, the wheel bearing device which is the object is explained.

  An example of a wheel bearing device for driving wheels is shown in FIG. This wheel bearing device includes an outer member 10 corresponding to a bearing outer ring, an inner member 20 corresponding to a bearing inner ring, and two rows of rolling elements 36 interposed between the outer member 10 and the inner member 20. Is the main component.

  The outer member 10 is provided with a flange for fixing to a vehicle body such as a knuckle, that is, a vehicle body mounting flange 12 on the outer periphery, and two tracks 14 are formed on the inner periphery. A portion indicated by reference numeral 16 of the outer member is a pilot portion that is inserted into an attachment hole formed in a knuckle or the like, and is referred to herein as a knuckle pilot.

  The inner member 20 includes a hub ring 20A and an inner ring 20B. In the hub wheel 20A, a wheel pilot 22 is formed at an end portion on the outboard side appearing on the left side of FIG. 3, and a small diameter portion 24 is formed at an end portion on the opposite inboard side. A spline (or serration, the same applies hereinafter) hole 26 penetrating in the axial direction is formed in the central portion of the hub wheel 20A. A flange for attaching a wheel, that is, a wheel attachment flange 28 is provided on the outer periphery of the end portion on the outboard side of the hub wheel 20A. A plurality of hub bolts 30 are attached to the wheel mounting flange 28. A track 32 is formed on the outer periphery of the intermediate portion of the hub wheel 20A.

  The inner ring 20B is disposed, for example, by interference fit on the small-diameter portion 24 of the hub wheel 20A, and the end surface of the inner ring 20B is abutted against a surface 25 rising in the radial direction from the small-diameter portion 24. In this sense, the surface 25 is referred to as an inner ring abutting surface. A track 34 is formed on the outer periphery of the inner ring 20B. The track 32 of the hub wheel 20A and the track 34 of the inner ring 20B correspond to the two tracks 14 of the outer member 10. Two rows of rolling elements 36 are movably interposed between the raceway 14 of the outer member 10 and the raceways 32 and 34 of the inner member 20 (hub wheel 20A and inner ring 20B). And the inner member 20 are supported so as to be relatively rotatable.

  Note that seals 38 are attached to both end portions between the opposing surfaces of the outer member 10 and the inner member 20. The seal 38 prevents foreign matter from entering the inside of the bearing and prevents leakage of grease filled in the bearing.

  In the wheel bearing device having the above-described configuration, the vehicle body attachment flange 12 of the outer member 10 is attached to the vehicle body by bolt fastening when assembled to the actual vehicle. Further, a spline shaft provided on the outer joint member of the constant velocity universal joint is inserted into the spline hole 26 of the hub wheel 20A, and a nut is screwed to a screw shaft formed at the tip of the spline shaft and tightened with a standard torque. By preloading the hub wheel 20A and the inner ring 20B in the axial direction, a preload is applied to the bearing. Further, the brake rotor (not shown) and the wheel of the wheel (not shown) are attached to the hub bolt 30 of the wheel mounting flange 28, and the wheel nut (not shown) is tightened. The wheel is centered by the wheel pilot 22 and the brake rotor is centered by the brake pilot 21.

  Next, a method for processing the flange surface 29 of the wheel mounting flange 28 of the hub wheel 20A in the wheel bearing device will be described. The processing method of the first embodiment includes a first step and a second step. In the first step, the end surface 23 of the wheel pilot 22 of the hub wheel 20A is turned on the basis of the inner ring abutting surface 25 with the hub wheel 20A alone. In the second step, after assembling the bearing, the outer diameter surface of the wheel pilot 22 of the hub wheel 20A is chucked, and the flange surface 29 of the wheel mounting flange 28 is turned using the wheel pilot end surface 23 as a reference surface.

  The first step will be described as follows according to FIG. The hub wheel 20 </ b> A constituting the inner member 20 of the wheel bearing device is held by the chuck device 42 at the small diameter portion 24. At this time, the chuck device 42 is abutted against the inner ring abutting surface 25. By inserting the spline shaft of the scrape 46 into the spline hole 26 of the hub wheel 20A and rotating the loop 46 as indicated by an arrow, a rotational force is applied so that the hub wheel 20A rotates at the rotation center of the wheel bearing device. Then, as shown by the white arrow, the cutting tool 44 is fed and the end surface 23 of the wheel pilot 22 is turned with reference to the inner ring abutment surface 25. By this processing, the axial deflection of the end surface 23 of the wheel pilot 22 during rotation of the wheel bearing device can be sufficiently reduced regardless of the dimensional error and assembly error of each member.

  The second process will be described as follows according to FIG. As shown in FIG. 1, the wheel bearing device that has finished the first step is held by the chuck device 48 on the outer diameter surface of the wheel pilot 22. At this time, the chuck device 48 is abutted against the end face 23 of the wheel pilot 22. In this state, the spline shaft of the knurl 52 is inserted into the spline hole 26 to rotate the inner member 20, and the bite 50 is fed as shown by the white arrow to flange surface 29 of the wheel mounting flange 28 of the hub wheel 20 </ b> A. Turning.

  According to this embodiment, it is possible to secure the end face 23 of the wheel pilot 22 in which the axial runout accuracy with respect to the rotation of the wheel bearing device in the first process is extremely small, and in the second process, the hub wheel 20A is used as a reference. Since the flange surface 29 of the wheel mounting flange 28 is turned, the axial surface runout of the flange surface 29 with respect to the rotation of the wheel bearing device and hence the pad sliding surface of the brake rotor fixed to the flange surface 29 is extremely small. can do.

  Further, distortion generated when the brake rotor is fixed to the wheel mounting flange 28 is also eliminated. Further, in the conventional method, the outer member 10 is fixed and the hub flange surface is cut, so that when the cutting load is applied, the rolling element contact surface is deformed and the bearing rotation shaft and the processing shaft are shaken. As a result, the phenomenon that the surface runout accuracy deteriorates correspondingly, but in this embodiment, when turning the flange surface 29, the outer member 10 is not restrained, and therefore, the bearing rotation center and The processing axis is less likely to be shaken and can be processed with high accuracy.

  Regarding the first step, it has been described that when turning the wheel pilot end surface 23 of the hub wheel 20A, the inner ring abutment surface 25 is used as a reference. However, the wheel pilot end surface 23 is turned on the basis of the raceway 32 of the hub wheel 20A. May be.

  Further, when turning the flange surface 29 in the second step, the hub wheel 20A is held on the outer diameter surface of the wheel pilot 22 by the chuck device 48. The chuck position of the hub wheel 20A at this time is shown in FIG. 1, in addition to the outer diameter of the wheel pilot 22, the inner diameter of the wheel pilot 22 (FIG. 3), the inner diameter of the serration hole 26 (FIG. 4), and the outer diameter of the wheel mounting flange 28 (FIG. 5) may be used.

  In the second embodiment, in the first step, as shown in FIG. 6, the outer surface of the hub wheel 20 </ b> A is ground on the basis of the end surface 23 of the wheel pilot 22 with the hub wheel 20 </ b> A alone. is there. In this case, the end face 23 of the wheel pilot 22 is supported by the chuck device 54, and the overall grinding wheel 56 having a contour corresponding to the outer peripheral surface of the hub wheel 20A including at least the track 32, the inner ring abutting surface 25, and the small diameter portion 24 is provided. use. Regarding the second step, all of the descriptions of the first embodiment above apply.

  The wheel bearing device has been described by way of example for a driving wheel in which a spline hole 26 is formed in the inner member 20 (hub wheel 20A). However, the wheel bearing for the non-driving wheel in which the hub wheel 20A is solid is described. It may be a device.

It is a longitudinal cross-sectional view for demonstrating the 2nd process of the processing method of this invention. It is a longitudinal cross-sectional view for demonstrating the 1st process of the processing method of this invention. It is a longitudinal cross-sectional view similar to FIG. 1 which shows the modification of a 2nd process. It is a longitudinal cross-sectional view similar to FIG. 1 which shows the modification of a 2nd process. It is a longitudinal cross-sectional view similar to FIG. 1 which shows the modification of a 2nd process. It is a longitudinal cross-sectional view similar to FIG. 2 which shows 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Outer member 12 Car body mounting flange 14 Track 16 Knuckle pilot 20 Inner member 20A Hub wheel 21 Brake pilot 22 Wheel pilot 23 End surface 24 Small diameter part 25 Inner ring abutting surface 26 Spline hole 28 Wheel mounting flange 30 Hub bolt 32 Track 20B Inner ring 34 Orbit 42, 48, 54 Chuck device 44, 50 Bite 46, 52 Kele 56 Total grinding wheel

Claims (7)

An outer member having a vehicle body mounting flange on the outer periphery and two rows of tracks on the inner periphery, an inner member comprising a hub wheel having a wheel mounting flange on the outer periphery and an inner ring disposed on a small diameter portion of the hub wheel; A method of cutting a wheel mounting flange surface of a wheel bearing device comprising two rows of rolling elements that are interposed between a raceway of a side member and a raceway of an inner member so as to be relatively rotatable. ,
With the hub ring alone, turning the wheel pilot end face of the hub ring based on the inner ring abutment surface of the hub ring,
Assemble outer member, inner member and rolling element,
A processing method for a wheel bearing device in which a brake rotor mounting surface of a wheel mounting flange of a hub wheel is turned on the basis of a wheel pilot end surface of the hub wheel. An outer member having a vehicle body mounting flange on the outer periphery and two rows of tracks on the inner periphery, an inner member comprising a hub wheel having a wheel mounting flange on the outer periphery and an inner ring disposed on a small diameter portion of the hub wheel; A method of cutting a wheel mounting flange surface of a wheel bearing device comprising two rows of rolling elements that are interposed between a raceway of a side member and a raceway of an inner member so as to be relatively rotatable. ,
With the hub wheel alone, turning the wheel pilot end face of the hub wheel on the basis of the track of the hub wheel,
Assemble outer member, inner member and rolling element,
A processing method for a wheel bearing device in which a brake rotor mounting surface of a wheel mounting flange of a hub wheel is turned on the basis of a wheel pilot end surface of the hub wheel. An outer member having a vehicle body mounting flange on the outer periphery and two rows of tracks on the inner periphery, an inner member comprising a hub wheel having a wheel mounting flange on the outer periphery and an inner ring disposed on a small diameter portion of the hub wheel; A method of cutting a wheel mounting flange surface of a wheel bearing device comprising two rows of rolling elements that are interposed between a raceway of a side member and a raceway of an inner member so as to be relatively rotatable. ,
With the hub wheel alone, the outer peripheral surface of the hub wheel is ground based on the wheel pilot end surface of the hub wheel.
Assemble outer member, inner member and rolling element,
A processing method for a wheel bearing device in which a brake rotor mounting surface of a wheel mounting flange of a hub wheel is turned on the basis of a wheel pilot end surface of the hub wheel.   4. The method for processing a wheel bearing device according to claim 1, wherein when turning the flange surface of the wheel mounting flange of the hub wheel, the wheel pilot outer diameter of the hub wheel is chucked.   4. The method for processing a wheel bearing device according to claim 1, wherein when turning the flange surface of the wheel mounting flange of the hub wheel, the wheel pilot inner diameter of the hub wheel is chucked.   4. The method for processing a wheel bearing device according to claim 1, wherein when the flange surface of the wheel mounting flange of the hub wheel is turned, the serration inner diameter of the hub wheel is chucked.   4. The processing method for a wheel bearing device according to claim 1, wherein when turning the flange surface of the wheel mounting flange of the hub wheel, the outer diameter of the wheel mounting flange of the hub wheel is chucked.

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