JP2001225606A - Wheel bearing device, and method of controlling bearing clearance gap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To observe a hearing axial clearance gap brought into direct correlation with a pre-load amount to be controlled, not grasping the pre-load amount indirectly via torque or the like, to provide a wheel bearing device in which a proper pre-load is secured. SOLUTION: Press-in is stopped once in a midway of a press-in process at first to measure an initial bearing axial clearance gap δ0 and an assembling width T0 between an axle 20 and an inner bearing ring 30 or an outer joint member 50. Then, the press-in is continued to measure an assembling width T1 under a condition where the press-in is finished, so as to find the bearing clearance gap δ1=δ0-(T0-T1). Caulking is carried out thereafter to measure an assembling width T2 after the caulking. The bearing axial clearance gap (pre-load amount) δ2 in a final assembly after caulking is found according to an equation δ2=δ1+(T1-T2).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel bearing device for rotatably supporting wheels of an automobile, and a method for managing a bearing clearance in the wheel bearing device.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 11-44319 describes a technique for setting a preload by measuring a torque by rotating a bearing at the time of assembling a bearing device, as shown in FIG.

FIG. 12A is a view schematically showing a configuration of a preload monitoring device mounted on the combination bearing 1. The preload monitoring device 4 includes a gear 5 provided with a rubber member that is in contact with the side surface of the outer ring 2 above the flange portion 2a, an outer ring rotating gear 6 meshed with the gear 5, a motor 7 for rotating the gear 6, and a motor 7 A torque detector 8 for detecting a rotational torque,
And a determiner 9 for comparing the detected rotational torque with a predetermined value. As the torque detector 9,
A wattmeter is used.

In the preload monitor 4, a motor 7 is driven to rotate the outer ring 2 via the gears 6 and 5, and a torque detector 8 detects a rotation torque of the outer ring 2 and based on the detected rotation torque. The preload is measured, and when the measured preload reaches a predetermined value set in advance, that is, a preload suitable for the combined bearing 1, the rocking type caulking device 3 is retracted. And
Even after the swaging by the swing type swaging apparatus 3, the rotational torque is monitored to confirm that the preload amount is appropriate.

FIG. 12B is a graph showing changes in the position A and the torque T (vertical axis) of the caulking mold 3a of the swing type caulking device 3 with respect to the caulking time t (horizontal axis).
Gradually lowering the position A of the crimping type 3a of the swing-type crimping device 3 starts to crimping, the rotational torque T applied preload from a certain point in time t ₀ the combination bearing 1 starts to change. When the fluctuation width reaches a predetermined width Δ (time point t ₁ ), it is determined that a preload suitable for the combined bearing 1 has been applied, and the caulking is completed. As a result, the position A of the caulking mold 3a is returned to the origin.

[0006]

In the above-mentioned prior art, it is not possible to directly confirm the amount of preload actually applied after the completion of caulking by the amount of preload. When the starting point of the preload is sensed by grasping the change point of the torque, the torque depends on the number of revolutions, and the torque greatly varies, so that an accurate preload amount cannot be measured. FIG.
In the combination bearing 1 shown in (a), a seal is mounted, but the torque changes depending on the presence or absence of the seal even if the preload amount is the same.

Accordingly, the present invention provides a wheel bearing device in which an appropriate preload amount is guaranteed, and does not indirectly grasp the preload amount through a torque or the like, but directly correlates with the preload amount. It is an object of the present invention to measure a bearing axial clearance and to manage the clearance.

[0008]

SUMMARY OF THE INVENTION The present invention provides a wheel bearing in which a proper preload amount is guaranteed by managing a negative bearing axial clearance after assembly based on values actually measured in an assembling process of a wheel bearing device. An apparatus is provided.

The basic concept of the clearance management according to the present invention is as follows. First, in the process of assembling the wheel bearing device, the inner member (the axle and the inner race or the axle and the outer joint member)
Is temporarily stopped in the middle of the press-fitting process, and in that state, the bearing axial clearance δ ₀ and the assembly width T ₀ of the axle and the inner race or the outer joint member are measured. Then, to continue the press-fit, while completing the press-fitting, the assembly width T ₁ was measured, the bearing axial clearance δ ₁ = δ ₀ - Request (T ₀ -T _1). Subsequently, performs crimping, measuring the assembled width T ₂ of the post-crimping. The preload increases because the axial clearance of the bearing decreases due to the caulking, but the clearance reduction (preload increase) is represented by T ₁ -T ₂ . Bearing axial clearance in the final assembly has been completed the caulking (preload) [delta] ₂
Is determined by the equation δ ₂ = δ ₁ + (T ₁ −T ₂ ). In addition,
If the inner race is fixed by caulking, the inner race may deform not only in the axial direction but also in the radial direction, which may affect the bearing axial clearance.Therefore, such deformation of the inner race is measured in advance. In addition, by converting the value in the axial direction and adding it to the actually measured value of the bearing axial clearance, more accurate clearance management can be achieved.

According to a first aspect of the present invention, there is provided an outer member having a first flange on an outer periphery for mounting to a vehicle body and having a double row of outer raceways on an inner periphery, and a second member for mounting wheels on an outer periphery. An inner member having a flange and having a double row of inner ring raceways on an outer periphery, and a double row rolling element interposed between the outer ring raceway and the inner ring raceway, wherein the inner member is formed of the second member. An axle having a flange, and an inner race that is pressed into the axle and fixed by caulking an end of the axle, and the double-row inner race is formed by the axle and the inner race. In the wheel bearing device arranged in a distributed manner, the bearing clearance is negatively measured and managed.

According to a second aspect of the present invention, in the wheel bearing device according to the first aspect, one of the double-row inner raceways is directly formed on an outer peripheral surface of the axle.

[0012] The invention of claim 3 provides the invention according to claim 1 or 2.
On management method of bearing clearance in wheel bearing device
The first franc to attach to the car body on the outer periphery
Outer member having a double row outer ring raceway on the inner periphery,
Having a second flange for mounting wheels on the outer periphery,
An inner member having a double-row inner raceway on the outer periphery;
From the double row rolling elements interposed between the road and the inner ring raceway
Wherein the inner member has the second flange.
Press the axle and the end of the axle
It is composed of an inner ring fixed by tightening
The double-row inner raceway is the axle and the inner raceway.
Management of bearing clearances of wheel bearing devices arranged in a distributed manner
Press-fitting the inner race into the axle
Press-fitting with the bearing axial clearance positive.
Stop, in this state, the reference plane of the axle and the inside
Axial dimension T between bearing ring and reference plane₀And initial bearing space
Char gap δ₀And continue press-fitting the inner race
After the press-fit of the inner race is completed, the reference surface of the axle
Axial dimension T between the inner race and the reference plane of the inner race₁Measure
Axial clearance δ after press-fitting₁Is the equation δ ₁
= Δ₀− (T₀-T₁), The end of the axle
After fixing the inner race, fix the inner race
The axial direction between the reference plane of the axle and the reference plane of the inner race
Dimension T_TwoIs measured and the axial clearance of the bearing after caulking δ
_TwoIs the equation δ_Two= Δ ₁+ (T₁-T_Two)
And features.

According to a fourth aspect of the present invention, there is provided an outer member having a first flange on an outer periphery for mounting to a vehicle body and having a double row of outer raceways on an inner periphery and a second member for mounting wheels on an outer periphery. An inner member having a flange and having a double row of inner ring raceways on an outer periphery, and a double row rolling element interposed between the outer ring raceway and the inner ring raceway, wherein the inner member is formed of the second member. An axle having a flange, and an outer joint member of a constant velocity universal joint fitted with the axle and fixed by caulking, and the double-row inner raceway is formed by the axle and the outer joint member. In a wheel bearing device arranged in a distributed manner, a bearing clearance is negatively measured and managed.

According to a fifth aspect of the present invention, in the wheel bearing device according to the fourth aspect, one of the double row inner ring raceways is formed directly on the outer joint member.

According to a sixth aspect of the present invention, in the wheel bearing device according to the fourth aspect, one of the double-row inner raceways is formed on a separate inner raceway fitted to the outer joint member. It is characterized by being.

According to a seventh aspect of the present invention, there is provided a method for managing a bearing clearance in a wheel bearing device according to any one of the fourth to sixth aspects. An outer member having a double-row outer ring track on the periphery, and an inner member having a second flange for attaching a wheel to the outer circumference and having a double-row inner ring track on the outer circumference,
It consists of a double row rolling element interposed between the outer raceway and the inner raceway, and the inner member is fixed to the axle having the second flange and the axle by fitting and caulking. A method of managing a bearing clearance of a wheel bearing device, which is constituted by an outer joint member of a constant velocity universal joint, and wherein the double-row inner raceway is distributed to the axle and the outer joint member. When the inner member is press-fitted into the outer joint member, the press-fitting is temporarily stopped with the bearing axial clearance being positive, and the axial dimension T ₀ between the reference surface of the axle and the reference surface of the outer joint member is determined. The axial clearance δ ₀ is measured, press-fitting is continued, and after press-fitting is completed,
The axial dimension T ₁ of the between the reference surface and the reference surface of the outer joint member of the axle is measured, the axial clearance [delta] ₁ after press fitting completion formula δ ₁ = δ ₀ - to (T ₀ -T ₁₎ based determined, caulking by fixing the above inner member and the outer joint member, after the crimping, measuring the axial dimension T ₂ of the between the reference surface and the reference surface of the outer joint member of the axle, after the crimping The axial clearance δ ₂ of the equation is given by the formula δ ₂ = δ ₁ + (T ₁ −
T ₂ ).

In the bearing clearance management method for a wheel bearing device according to claim 3 or 7, the reference surface of the axle may be the flange surface of the second flange as in the invention of claim 8, or According to the ninth aspect of the present invention, the end face on the second flange side may be used.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention shown in the drawings will be described below.

The wheel bearing device shown in FIG. 1 has an outer member 10 having a double row of outer raceways 12 on the inner periphery and an inner member (20, 30) having a double row of inner raceways 22, 32 on the outer periphery. ,
A double row of balls 40 rotatably interposed between the outer raceway 12 and the inner raceways 22, 32 is a main component.

The outer member 10 integrally has a flange 14 on its outer periphery, and is attached to a suspension (not shown) of the vehicle body via the flange 14. The inner member (20, 30) here comprises an axle 20 and an inner race 30. A flange 24 for attaching a wheel (not shown) is integrally provided around the outer periphery of one end of the axle 20, and a hub bolt 25 for fastening a wheel disc is implanted at a position equally spaced in the circumferential direction of the flange 24. . A small-diameter cylindrical portion 26 for fitting with the inner race 30 is formed on the outer periphery of the other end of the axle 20. Inner race 30 is axle 2
0 by press-fitting into the small-diameter cylindrical portion 26, and caulking the end of the small-diameter cylindrical portion 26 as indicated by reference numeral 29, whereby
6 is fixed in a state where it abuts against the shoulder 27 of the small-diameter cylindrical portion 26. Therefore, the inner member (20, 30) integrated with the wheel is rotatably supported by the outer member 10 by the wheel bearing device.

Although the illustrated wheel bearing device is used for a driven wheel, it can also be used for a driving wheel by integrating the axle 20 with a constant velocity universal joint as in an embodiment described later. In FIG. 1, reference numeral 42 denotes a retainer for retaining the ball 40. Further, seals 44 and 46 are provided to prevent leakage of lubricating grease filled in the bearing and to prevent foreign matter and muddy water from entering from outside.

Assuming that the bearing axial clearance in the wheel bearing device is δ ₂ , the bearing axial clearance δ ₂ is a negative value and cannot be directly measured. In the process of assembling the bearing device, the preload of the wheel bearing device is appropriately managed by actually measuring without using torque or other parameters.

First, as shown in FIG. 2, in the process of assembling the wheel bearing device, the inner race 30 is pressed into the small-diameter cylindrical portion 26 of the axle 20, and the small end face 36 of the inner race 30 is fixed to the small-diameter cylinder of the axle 20. The press-fitting is temporarily stopped short of contacting the shoulder 27 of the part 26. At this time, when the large end surface 34 of the inner race 30 is press-fitted to a predetermined position, a predetermined space S remains between the small end surface 36 of the inner race 30 and the shoulder 27 of the small diameter cylindrical portion 26 of the axle 20. . Further, the bearing axial clearance is positive. In this state, the axial dimension T ₀ from the reference surface (large end surface 34) of the inner race 30 to the reference surface (flange surface 24 ′) of the axle 20 is measured, and further, the axial deflection of the outer member 10 is measured. The initial bearing axial clearance δ ₀ is measured from the amount.

Subsequently, the press-fitting is continued, and the small end face 36 of the inner race 30 is moved to the shoulder 27 of the axle 20 as shown in FIG.
And press-fitting is completed. After press-fitting completion, to measure the axial dimension T ₁ of the reference plane 34 of the inner bearing ring 30 to the reference surface 24 'of the axle 20. Then, the bearing axial clearance [delta] ₁ in this case equation δ ₁ = δ ₀ - obtained from (T ₀ -T _1).

Next, the end portion 28 of the axle 20 is shown in FIG.
The inner race 30 is fixed by bending and caulking as shown at 9. Then, the reference surface 3 of the inner race 30 after caulking.
4 and measuring the axial dimension T ₂ of the between the reference plane 24 of the axle 20 ', wherein [delta] ₂ of the bearing axial clearance [delta] ₂ at this time
= Δ ₁ + (T ₁ −T ₂ ).

In this manner, an accurate value of the bearing axial clearance δ ₂ after caulking is obtained based on the actually measured values. Thus, the preload amount corresponding to the bearing axial clearance [delta] ₂ can also be accurately controlled.

The axial dimensions (assembly width) T ₀ , T ₁ ,
The reference surface for measuring T _2, the case of measuring the large end face 34 of the flange surface 24 'and the inner bearing ring 30 of the flange 24 of the axle 20 as a reference plane has been described as an example, the axle 20 is The measurement may be performed using the end surface 20 'as a reference surface instead of the flange surface 24', and in this case, the same result as described above is obtained.

FIG. 4 shows an embodiment applied to a wheel bearing device for a drive wheel. In this embodiment, an axle 20 and an outer joint member 50 of a constant velocity universal joint are integrated, and an inner race 30 is provided. Are fitted with the outer joint member 50. Since the inner race 30 does not fit with the axle 20, the small-diameter cylindrical portion (2
6: see FIG. 1), and the minimum outer diameter of the axle 20 can be increased. As a result, the spline hole 21 of the axle 20 and the spline shaft 5 of the outer joint member 50 are formed.
7, it is possible to make the outer joint member 50 hollow as shown in the figure, and it is possible to reduce the weight. The bearing axial clearance δ ₂ in the wheel bearing device according to this embodiment is also measured in the process of assembling the wheel bearing device without using torque or other parameters as described below. Apparatus preload is properly managed.

First, in the process of assembling the wheel bearing device,
As shown in FIG. 5, the stem portion (5
5, 56, 57, 58) to the inner race 30 and the axle 2
0, the spline shaft portion 57 is partially fitted into the spline hole portion 21 of the axle 20, and the press-fit portion 5
5 and 56 are partially press-fitted into the press-fit portions 23 of the inner race 30 and the axle 20, respectively. And the outer joint member 5
The press-fitting is temporarily stopped just before the abutting surface 54 of the “0” comes into contact with the large end surface 34 of the inner race 30. (At this time, it is assumed that the end surface 27 'of the axle 20 is in contact with the small end surface 36 of the inner race 30.) At this time, when the outer joint member 50 is press-fitted to a predetermined position, the outer joint member 50 There is a predetermined interval S between the butting surface 54 and the large end surface 34 of the inner race 30, and the bearing axial clearance is positive. In this state, the axial dimension T ₀ from the reference surface of the outer joint member 50 (shoulder surface 53) to the reference plane of the axle 20 (flange surface 24 ') is measured, further deflection of the axial direction of the outer member 10 The initial bearing axial clearance δ ₀ is measured from the amount.

Subsequently, the press-fitting is continued, and as shown in FIG. 6, the butting surface 54 of the outer joint member 50 is brought into contact with the end face 27 'of the axle 20, thereby completing the press-fitting. After the press-fitting is completed, the reference surface 53 of the outer joint member 50 is moved to the reference surface 2 of the axle 20.
4 to measure the axial dimension T ₁ of the up '. Then, the bearing axial clearance [delta] ₁ in this case equation _{δ 1 = δ 0 - (T} 0
−T ₁ ).

Next, the end portion 58 of the stem portion of the outer joint member 50 is bent and crimped as shown by reference numeral 59 in FIG. Then, an axial dimension T ₂ between the reference surface 34 of the inner race 30 after caulking and the reference surface 24 ′ of the axle 20 is measured, and the axial clearance δ ₂ at this time is calculated by the equation δ ₂ = δ.
Obtained from the _{1 + (T 1 -T 2)} .

In this way, an accurate value of the bearing axial clearance δ ₂ after caulking is obtained based on the actually measured values. Thus, the preload amount corresponding to the bearing axial clearance [delta] ₂ can also be accurately controlled.

The axial dimensions (assembly width) T ₀ , T ₁ ,
The reference surface for measuring T _2, the case of measuring the shoulder surface 53 of the flange surface 24 'and the outer joint member 50 of the flange 24 of the axle 20 as a reference plane has been described as an example, the axle 20 is The measurement may be performed by using the end surface 20 ′ as a reference surface and providing a new reference surface on the outer diameter of the outer joint member 50.

FIG. 7 shows still another embodiment of the wheel bearing device for driving wheels. In this embodiment, the inner race 30 in the above embodiment is omitted, and the inner race 3
The inner raceway (inboard side inner race) 52 corresponding to the inner raceway 32 formed in the outer joint member 50
Is formed directly. In other words, this wheel bearing device has an outer member 10 having a double row of outer raceways 12 on the inner periphery.
An inner member (20, 50) having double rows of inner raceways 22, 52 on the outer periphery; an outer raceway 12 and inner raceways 22, 52;
And a plurality of rows of balls 40 that are rotatably interposed therebetween. The same components or parts as those already described with reference to FIGS. 1 and 4 are denoted by the same reference numerals, and redundant description will be omitted.

Here, the inner members (20, 50) are axles 2
0 and the outer joint member 50 of the constant velocity universal joint. A press-fit portion 23 for fitting with the outer joint member 50 is formed on the outer periphery on the other end side of the axle 20. The outer joint member 50 is press-fitted into the press-fitting portion 23 of the axle 20, and the end of the stem portion is caulked as indicated by reference numeral 59, thereby fixing the butting surface 54 in contact with the end face 27 'of the axle 20. Is done. Therefore, the inner member (20, 50) integrated with the wheel is rotatably supported by the outer member 10 by the wheel bearing device.

The axial axial clearance δ ₂ in the wheel bearing device of this embodiment is basically the same as that of the above-described embodiment. In the assembly process of the wheel bearing device, torque and other parameters are used. The preload of the wheel bearing device is properly managed.

First, as shown in FIG. 8, in the process of assembling the wheel bearing device, the stem portion of the outer joint member 50 is inserted into the axle 20, and the press-fit portion 56 and the spline shaft portion 57 are respectively inserted into the press-fit portion 23 of the axle 20. And spline hole 2
1 and partially butted into the butting surface 5 of the outer joint member 50.
The press-fitting is temporarily stopped before the abutment 4 comes into contact with the end face 27 'of the axle 20. At this time, the butt surface 5 of the outer joint member 50 is
4 and the end surface 27 'of the axle 20, there is a predetermined spacing S, and the bearing axial clearance is positive. In this state, the axle 2 is moved from the reference surface (shoulder surface 53) of the outer joint member 50.
Axial dimension T ₀ up to 0 reference plane (flange surface 24 ′)
, And an initial bearing axial clearance δ ₀ is measured from the axial runout of the outer member 10.

Subsequently, the press-fitting is continued, and as shown in FIG. 9, the butting surface 54 of the outer joint member 50 is brought into contact with the end face 27 'of the axle 20 to complete the press-fitting. After the press-fitting is completed, the reference surface 53 of the outer joint member 50 is moved to the reference surface 2 of the axle 20.
4 to measure the axial dimension T ₁ of the up '. Then, the bearing axial clearance [delta] ₁ in this case equation _{δ 1 = δ 0 - (T} 0
−T ₁ ).

Next, as shown in FIG. 10, the flange 24 of the axle 20 is pressed to apply a preload while the outer joint member 50 is supported by the receiving base 60 for supporting the preload and the pressure input. The end portion 58 of the stem portion of the member 50 is bent and crimped as indicated by reference numeral 59. Then, by measuring the axial dimension T ₂ of the between the reference surface 24 of the reference surface 53 and the axle 20 of the outer joint member 50 after the crimping '(FIG. 7), wherein [delta] ₂ of the bearing axial clearance [delta] ₂ at this time = Δ ₁ + (T
₁₋ T ₂ ).

In this manner, an accurate value of the axial clearance δ ₂ of the bearing after caulking is obtained based on the actually measured values. Thus, the preload amount corresponding to the bearing axial clearance [delta] ₂ can also be accurately controlled.

Also in this case, the axial dimensions (assembly width) T ₀ , T
_1, has been described as an example a case in which T ₂ and the flange surface 24 of the flange 24 of the axle 20 'as a reference surface for measuring the measuring shoulder surface 53 of the outer joint member 50 as a reference surface for the axle 20 The end surface 20 'on the flange 24 side is used as a reference surface, and the outer joint member 50 is shown in FIG.
Or a new reference plane 53 'as exemplified by the broken line in FIG.
May be provided for measurement.

FIG. 1, FIG.
The end 2 as described above in connection with FIGS.
In addition to the caulking process of bending and caulking 8, 58, as a modification of the embodiment of FIGS.
As shown by reference numeral 59 ', the caulking process can be performed by ironing the outer periphery of the shaft end of the outer joint member 50. Of course, caulking using a so-called swing type caulking device as shown in FIG. 12 can also be adopted.

[0043]

As described above, according to the present invention, a proper preload amount is guaranteed by managing the negative bearing axial clearance after assembly based on values actually measured in the assembly process of the wheel bearing device. A wheel bearing device is provided. In the clearance management method, first, press-fitting is temporarily stopped during the press-fitting process, and in this state, the bearing axial clearance δ ₀ and the assembly width T ₀ of the axle and the inner race or the outer joint member are measured. Then, to continue the press-fit, while completing the press-fitting, the assembly width T ₁ was measured, the bearing axial clearance δ ₁ = δ ₀ - Request (T ₀ -T _1). continue,
Performs caulking, to measure the assembly width T ₂ after the crimping. The amount of preload increases because the axial clearance of the bearing decreases due to caulking, but the amount of clearance reduction (the amount of increase in preload) is T ₁
Represented by -T _2. The bearing axial clearance (preload) δ ₂ in the final assembly after the caulking has been completed is given by the formula δ ₂ = δ
Obtained by the _{1 + (T 1 -T 2)} . Thus, in the process of assembling the wheel bearing device, the assembling width (T ₀ , T ₁ , T ₂ )
By performing the preload control by actually measuring the initial bearing axial clearance δ ₀ , an appropriate preload amount can be controlled and guaranteed for all products, and the reliability of the products is greatly improved.

Therefore, the wheel bearing device of the present invention measures the preload amount (bearing axial clearance) directly instead of indirectly grasping the preload amount by converting the torque as in the above-described conventional device. Therefore, the preload amount of all the finished products is controlled in a 100% process, and high reliability can be guaranteed for shipping.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a wheel bearing device showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the wheel bearing device of FIG. 1 in a press-fitting process.

FIG. 3 is a longitudinal sectional view of the wheel bearing device of FIG. 1 at the time of completion of press fitting.

FIG. 4 is a longitudinal sectional view of a wheel bearing device showing another embodiment.

FIG. 5 is a longitudinal sectional view of the wheel bearing device of FIG. 4 in a press fitting process.

6 is a longitudinal sectional view of the wheel bearing device of FIG. 4 at the time of completion of press fitting.

FIG. 7 is a longitudinal sectional view of a wheel bearing device showing still another embodiment.

FIG. 8 is a longitudinal sectional view of the wheel bearing device of FIG. 7 in the process of press fitting.

9 is a longitudinal sectional view of the wheel bearing device of FIG. 7 at the time of completion of press fitting.

FIG. 10 is a longitudinal sectional view illustrating a caulking method.

FIG. 11 is a longitudinal sectional view illustrating another caulking method.

FIG. 12A is a schematic diagram for explaining a conventional technique, and FIG. 12B is a graph showing a change in a swaging position A and a torque T of the swing type swaging apparatus with respect to a swaging time t.

[Explanation of symbols]

 Reference Signs List 10 outer member 12 outer raceway (outer race) 14 flange 18 end surface 20 axle (inner member) 20 'end surface 22 inner raceway (outboard side inner race) 23 press-fit portion 24 flange 24' flange surface 25 hub bolt 26 small diameter cylindrical portion 27 Shoulder 27 ′ End face 28 End part 29 Staking part (end after swaging) 30 Inner race (inner member) 32 Inner raceway (inboard side inner race) 34 Large end face 36 Small end face 40 Ball 42 Cage 44 Seal 46 Seal 50 Outer joint member 51 Mouth part 51 ′ end face 52 Inner raceway (inboard side inner race) 53 Shoulder surface 54 Butt face 55 Press-fit part 56 Press-fit part 57 Spline shaft part 58 End part 59 Swaged part (end after swaging) ) 60 cradle

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nobuyoshi Yamashita 1578 Higashikaizuka, Iwata City, Shizuoka Prefecture Inside (72) Inventor Yutaka Yamauchi 1578 Higashikaizuka, Iwata City, Shizuoka Prefecture F-Term (in reference) ) 3J101 AA02 AA43 AA54 AA62 AA72 BA53 BA54 FA44 GA01

Claims (9)

[Claims] 1. An outer member having a first flange on an outer periphery for attaching to a vehicle body, an outer member having a double-row outer ring track on an inner periphery, and a second flange for attaching a wheel on an outer periphery.
An inner member having a double-row inner raceway on the outer periphery, and a double-row rolling element interposed between the outer raceway and the inner raceway, wherein the inner member has an axle having the second flange. When,
An inner raceway fixed by crimping the end of the axle while press-fitting into the axle, and the double-row inner raceway is distributedly arranged on the axle and the inner raceway. The wheel bearing device according to claim 1, wherein the bearing clearance is measured and controlled negatively. 2. The wheel bearing device according to claim 1, wherein one of the double-row inner raceways is formed directly on an outer peripheral surface of the axle. 3. A first flange for attaching to a vehicle body on an outer periphery.
Outer member having a flange and having double rows of outer raceways on its inner periphery
And, having a second flange for mounting the wheel on the outer periphery,
An inner member having a double-row inner raceway on the outer periphery; and a double-row rolling member interposed between the outer raceway and the inner raceway.
A moving body, wherein the inner member has an axle having the second flange;
Press into the axle and swage the end of the axle
And the inner ring fixed by
Double-row inner raceway is distributed between the axle and inner raceway
For managing the bearing clearance of a wheel bearing device arranged in a car
In pressing the inner race into the axle,
Press-fitting is temporarily stopped with the char gap being positive, and the reference surface of the axle and the inner race
Axial dimension T between reference plane₀And initial bearing axial
Δ₀After the press-fitting of the inner race is completed, the reference surface of the axle and the
Axial dimension T between the inner race and the reference plane₁And the axial clearance δ after press-fitting is completed.₁Is the equation δ₁= Δ₀
− (T₀-T₁), The end of the axle is caulked to fix the inner race, and after caulking, the reference surface of the axle and the reference surface of the inner race are obtained.
Axial dimension T between _TwoIs measured and the axial clearance δ_TwoIs the equation δ_Two= Δ₁+
(T₁-T_Two), Characterized in that it is determined based on
Bearing clearance management method for bearing devices. 4. An outer member having a first flange on an outer periphery for mounting to a vehicle body, an outer member having a double row of outer ring tracks on an inner periphery, and a second flange for mounting a wheel on an outer periphery.
An inner member having a double-row inner raceway on the outer periphery, and a double-row rolling element interposed between the outer raceway and the inner raceway, wherein the inner member has an axle having the second flange. And an outer joint member of a constant velocity universal joint fitted to the axle and fixed by caulking, and the double-row inner raceway is distributed and arranged on the axle and the outer joint member. The wheel bearing device according to claim 1, wherein the bearing clearance is measured and controlled negatively. 5. The wheel bearing device according to claim 4, wherein one of the double-row inner raceways is formed directly on the outer joint member. 6. The wheel bearing device according to claim 4, wherein one of the double-row inner raceways is formed on a separate inner race that is fitted to the outer joint member. 7. An outer member having a first flange on an outer periphery for attaching to a vehicle body, an outer member having a double row of outer ring tracks on an inner periphery, and a second flange for attaching a wheel on an outer periphery.
An inner member having a double-row inner raceway on the outer periphery, and a double-row rolling element interposed between the outer raceway and the inner raceway, wherein the inner member has an axle having the second flange. And an outer joint member of a constant velocity universal joint fitted to the axle and fixed by caulking, and the double-row inner raceway is distributed and arranged on the axle and the outer joint member. In the method for managing a bearing clearance of a wheel bearing device, when the inner member is press-fitted into the outer joint member, press-fitting is temporarily stopped with the bearing axial clearance being positive, and the reference surface of the axle and the outer joint member are The axial dimension T ₀ and the bearing axial clearance δ ₀ between the reference surface and the bearing surface are measured, and the press-fitting of the inner member is continued. After the press-fitting, the reference surface of the axle and the reference surface of the outer joint member are measured. Axial dimension between ₁ was measured, the axial clearance [delta] ₁ after press fitting completion Formula [delta] ₁ = [delta] ₀ -
(T ₀ −T ₁ ), fixing the inner member and the outer joint member by caulking, and after caulking, the axial dimension between the reference surface of the axle and the reference surface of the outer joint member T ₂ is measured, and the axial clearance δ ₂ after caulking is calculated by the formula δ ₂ = δ ₁ + (T
Bearing gap management method of a wheel bearing apparatus characterized by determining based on ₁ -T _2). 8. The reference surface of the axle is a flange surface of the second flange.
3. The method for managing a bearing clearance of a wheel bearing device according to item 1. 9. The method according to claim 3, wherein a reference surface of the axle is an end surface on the second flange side.