JP5866816B2 - Manufacturing method of wheel bearing device - Google Patents

Description

  The present invention relates to an inner ring forming member, a wheel bearing device, and a manufacturing method thereof.

  As a conventional wheel bearing device, an inner member rotatable around a central axis, an outer member (outer ring) disposed on the outer periphery of the inner member, and the outer member and the inner member. Some have double-row rolling elements interposed therebetween (for example, Patent Document 1).

  The inner member includes a hub ring and an inner ring, and is disposed so as to be rotatable on the central axis. The hub wheel has a wheel mounting flange on its outer peripheral surface. The inner ring includes an inner ring on the vehicle outer side and an inner ring on the vehicle inner side, and is attached to the outer peripheral surface of the hub ring.

  The inner ring on one side (the vehicle outer side) has two large and small inner rings arranged in parallel via a first outer track portion and a first outer track portion that rolls the rolling members in the vehicle outer side row among the double row rolling elements. Has a bag.

  The other (vehicle inner side) inner ring has two large and small inner rows arranged in parallel via a second outer raceway portion and a second outer raceway portion for rolling the rolling bodies in the vehicle inner side row among the double row rolling elements. Has a bag.

  The outer member has a body mounting flange and is attached to the vehicle inner side via a knuckle of a suspension device. The outer member includes a first inner track portion that rolls the rolling elements on the vehicle outer side row among the rolling elements on the double row, and the rolling elements on the vehicle inner side row among the double row rolling elements. A second inner track is provided.

  The double-row rolling elements are tapered rollers, and the rolling elements in each row are held by a cage so as to be able to roll.

  The rolling elements of one side row (vehicle outer side row) are disposed between the first inner raceway portion and the first outer raceway portion. A seal member interposed between the outer member and the inner ring on the vehicle outer side is disposed on the vehicle outer side of the rolling elements in the one side row.

  The rolling elements of the other side row (vehicle inner side row) are disposed between the second inner raceway portion and the second outer raceway portion. A seal member interposed between the outer member and the inner ring on the vehicle inner side is disposed on the vehicle inner side of the rolling elements in the other side row.

  With the above configuration, when the wheel rotates, this rotation is transmitted to the hub wheel and the inner ring, and the hub wheel rotates together with the inner ring.

  By the way, this type of wheel bearing device is manufactured, for example, as shown in FIG. 6, via rolling element rows 101 and 102 on the vehicle outer side taper portion 100a and the vehicle inner side taper portion 100b of the outer ring forming member 100, respectively. The hub ring forming shaft member 105 is inserted into the inner ring forming members 103 and 104 arranged in advance, and the vehicle inner side insertion end portion 105b of these insertion end portions 105a and 105b is plastically deformed (caulked). It may be done.

In this case, as the outer ring forming member 100, the deformation amount of the vehicle inner side insertion end portion 105b of the shaft member 105 is larger than the deformation amount of the vehicle outer side insertion end portion 105a. outer ring forming member to the slope angle theta ₂ of the gradient angle theta ₁ and the vehicle outer side tapered portion 100a and θ _1> θ ₂ is used.

  Thus, after the wheel bearing device is manufactured, the gradient angle of the first outer track portion in the inner ring on the vehicle outer side and the gradient angle of the second outer track portion in the inner ring on the vehicle inner side are the rolling element rows 101 and 102. It is possible to obtain an inner ring on the vehicle outer side and an inner ring on the vehicle inner side that are set at an appropriate angle at which the wheel can smoothly roll.

JP 2002-206538 A

  However, in the conventional method for manufacturing a wheel bearing device, changes in the gradient angle of the inner end surface of the inner ring of the inner ring before and after the caulking of the vehicle inner side insertion end portion 105b and changes in the outer diameter of the outer peripheral surface of the outer ring are taken into account. Was not. Therefore, after caulking of the vehicle inner side insertion end portion 105b, the inclination angle of the inner end surface of the large cage is not necessarily an appropriate angle, and the tightening margin of the seal member disposed on the outer circumferential surface of the large cage is not always appropriate. It was not a dimension.

  Accordingly, an object of the present invention is to provide an inner ring having an appropriate angle for the outer raceway and the inner end face of the eaves and an appropriate seal tightening margin on the outer circumference of the eaves. An object of the present invention is to provide an inner ring forming member, a wheel bearing device, and a manufacturing method thereof.

  The present inventor obtains an inner ring having a proper seal tightening margin on the outer peripheral surface of the large cage while the gradient angle of the outer track portion on the vehicle inner side and the gradient angle of the inner end surface of the large cage are set to appropriate angles. When the following means are adopted in the process, it has been found that an inner ring having a desired effect can be obtained.

One aspect of the present invention, in order to achieve the above object, provides (1) to (2) car wheel bearing equipment manufacturing method of the.

(1) An outer ring having an inner raceway for rolling the tapered roller for bearing, an outer raceway for rolling the tapered roller for bearing between the inner raceway, and the outer raceway in parallel. An inner ring having large and small flanges, a hub ring having a wheel mounting flange, and a seal member mounted between the inner ring and the outer ring, the hub ring on the large collar side of the inner ring A method of manufacturing a wheel bearing device in which the inner ring is fixed to the outer peripheral surface of the hub ring by caulking, the inner ring taper portion serving as the outer raceway portion, and the large flange serving as a large collar or a small collar of the inner ring. , Using an inner ring forming member having a small flange, an outer ring forming member having an outer ring taper portion serving as the inner raceway portion of the outer ring, and a shaft member serving as the hub ring. With the tapered roller for bearing in between Between the step of disposing the inner ring forming member with the inner ring taper portion facing each other, and the inner peripheral surface of the vehicle inner side opening of the outer ring forming member and the outer peripheral surface of the large flange of the inner ring forming member. Attaching the seal member, inserting the shaft member into the inner ring forming member and attaching the shaft member to the inner ring forming member, and a vehicle inner side end of the shaft member in the shaft member And caulking the outer end surface of the large flange to form a caulked portion, wherein the gradient angle of the outer race portion of the inner ring is α ₁ , and the gradient angle of the inner end surface of the large collar is When β ₁ is set, α _{2 is} the gradient angle of the inner ring taper portion of the inner ring forming member, and β ₂ is the gradient angle of the inner end face of the large flange, (α ₁ −α ₂ ) / (β ₁ − the value of β ₂₎ is inequality (α ₁ - _{2) / (β 1 -β 2} )> 1 manufacturing method for the wheel bearing device is set to the ratio that satisfies.

(2) The method for manufacturing a wheel bearing device according to claim 1, wherein the outer diameter of the large flange is set to a dimension that gradually decreases from the inner ring taper portion side toward the opposite side. .

  According to the present invention, it is possible to obtain an inner ring having a proper seal tightening margin on the outer peripheral surface of the large cage while setting the gradient angle of the outer track portion and the gradient angle of the inner end surface of the large cage.

Sectional drawing shown in order to demonstrate the whole wheel bearing apparatus which concerns on embodiment of this invention. Sectional drawing shown in order to demonstrate the principal part of the wheel bearing apparatus which concerns on embodiment of this invention. Sectional drawing which shows the member for inner ring formation for forming the inner ring | wheel of the wheel bearing apparatus which concerns on embodiment of this invention. (A)-(d) is sectional drawing shown in order to demonstrate the manufacturing method of the inner ring | wheel in the wheel bearing apparatus which concerns on embodiment of this invention. (A) shows the assembly process of the inner ring forming member, (b) shows the installation process of the seal member, (c) shows the assembly process of the shaft member, and (d) shows the formation process of the caulking portion. . Sectional drawing which shows the other member for inner ring formation for forming the inner ring | wheel of the wheel bearing apparatus which concerns on embodiment of this invention. Sectional drawing shown in order to demonstrate the malfunction at the time of grind | polishing using the inner ring | wheel in the conventional wheel bearing apparatus.

[Embodiment]
(Whole configuration of wheel bearing device)
FIG. 1 shows the entire wheel bearing device. FIG. 2 shows a main part of the wheel bearing device. As shown in FIG. 1, a wheel bearing device 1 includes an inner member 2 that can rotate around a central axis O, an outer member (outer ring) 3 that is disposed around the outer periphery of the inner member 2, and A double-row rolling element 4, 5 interposed between the outer member 3 and the inner member 2 is provided, and is disposed between a vehicle body (not shown) and a wheel (not shown).

(Configuration of the inner member 2)
The inner member 2 includes a hub ring 6 and an inner ring 7, and is disposed on the central axis O so as to be rotatable.

  The hub ring 6 has two large and small body parts 6a and 6b (a large diameter body part 6a and a small diameter body part 6b) having different outer diameters. The inner ring 7 is inserted through the inner periphery of the outer member 3. The whole is formed of a cylindrical molded body made of, for example, bearing steel, carburized steel or the like.

  The large-diameter trunk portion 6a is disposed on the vehicle outer side of the hub wheel 6 (left side in FIG. 1). The large-diameter trunk portion 6a is integrally provided with an annular wheel mounting flange 60a that protrudes on the outer peripheral surface of the large-diameter trunk portion 6a on the vehicle outer side and for mounting a wheel (not shown). The wheel mounting flange 60a is provided with a plurality of bolt insertion holes 600a (only one is shown) through which the hub bolt 8 is inserted in parallel in the circumferential direction.

  The small-diameter body portion 6b has an annular recess 60b for attaching the inner ring 7 on the outer peripheral surface, and is disposed on the vehicle inner side (right side in FIG. 1) of the hub wheel 6. The recess 60b is formed by caulking the open end A (indicated by a two-dot chain line in FIG. 1) of the cylindrical shaft member that becomes the hub wheel 6. Reference numeral 6 c in FIG. 1 is a caulking portion 6 c formed by caulking of the opening end A.

  On the other hand, the inner ring 7 includes a first inner ring 70 and a second inner ring 71, which are arranged in parallel with each other in the direction of the central axis O and fixed in the recess 60b of the hub ring 6, and the whole is made of, for example, bearing steel, It is formed by a cylindrical shaped body made of carburized steel.

  The first inner ring 70 includes an outer track part 70a for rolling the rolling elements 4 in the vehicle outer side row of the double row rolling elements 4 and 5, and two large and small rods 70b arranged in parallel via the outer track part 70a. 70c (large collar 70b, small collar 70c), which is arranged along the central axis O on the vehicle outer side of the inner ring 7. The inner diameter d of the first inner ring 70 is set to a dimension of d = 57 mm, for example.

The outer raceway portion 70 a is provided at the groove bottom by forming an annular groove 70 d on the outer peripheral portion of the first inner ring 70. Gradient angle of the outer raceway part 70a, the outer diameter from the vehicle inner side angle that gradually increases toward the vehicle outer side (the outer race portion 71a of the second inner ring 71 shown in FIG. 2 gradient angle alpha ₁ identical to the (Gradient angle).

The large cage 70b is disposed on the vehicle outer side of the first inner ring 70. The large collar 70b is a flat surface with the outer end surface 700b substantially perpendicular to the central axis O, and the inner end surface 701b has a predetermined gradient angle toward the outer track part 70a with respect to the outer end surface 700b (the first angle shown in FIG. 2). 2, each of the inner races 71 is formed with an inclined surface that is inclined with the same inclination angle as the inclination angle β ₁ of the outer raceway portion 70 a. The outer peripheral surface of the large collar 70b receives a sealing member 9 having a uniform outer diameter (same outer diameter as the outer diameter D ₁ of the large rib 71b of the second inner ring 71 shown in FIG. 2) along the central axis O It is formed by a seal surface 702b as a receiving surface.

The gavel 70 c is disposed on the vehicle inner side of the first inner ring 70. The gavel 70c is a flat surface in which the outer end surface 700c is substantially orthogonal to the central axis O, and the inner end surface 701c has a predetermined gradient angle toward the outer track part 70a with respect to the outer end surface 700c (the first angle shown in FIG. 2). It is formed by inclined surface inclined at the same slope angle) and slope angle beta ₁ of the inner end surface 711c of the second inner ring 71.

  The second inner ring 71 includes an outer track part 71a for rolling the rolling elements 5 in the vehicle inner side row of the double row rolling elements 4 and 5, and two large and small rods 71b arranged in parallel via the outer track part 71a. 71c (large ridge 71b, small ridge 71c) and disposed along the central axis O on the inner side of the inner ring 7 on the vehicle inner side. The inner diameter of the second inner ring 71 is set to the same dimension as the inner diameter d of the first inner ring 70.

Further, as shown in FIG. 1, the second inner ring 71 has the outer raceway portion 71a opposed to the inner raceway portion 3b of the outer member 3 via the rolling elements 5, and in this state, the radially outer side of the large collar 71b. This is formed by restricting the deformation to the predetermined position (for example, the inner peripheral surface of the restraining ring as a restricting ring) and caulking the vehicle inner side insertion end portion of the hub wheel 6 toward the outer end surface 710b side of the large collar 71b. Between the crimped portion 6c and the wheel mounting flange 60a, the first inner ring 70 is interposed and fixed. Furthermore, as shown in FIG. 2, the second inner ring 71 includes a large collar 71b before and after the formation of the caulking portion 6c and the angle difference α ₁ -α ₂ of the outer track portion 71a before and after the formation of the caulking portion 6c. The ratio (α ₁ -α ₂ ) / (β ₁ -β ₂ ) to the angle difference β ₁ -β ₂ of the gradient angle of the inner end surface 711b of the inequality is (α ₁ -α ₂ ) / (β ₁ -β ₂ ) The ratio is set to satisfy> 1.

The outer track part 71a is provided at the groove bottom by forming an annular groove 71d on the outer periphery of the second inner ring 71. Alpha ₁ (gradient angle relative to the rotational axis O after the formation of the caulking portion 6c of the hub wheel 6) slope angle of the outer raceway section 71a is the angle that gradually increases toward the vehicle inner side the outer diameter from the vehicle outer side Is set. The gradient angle α ₁ is set to be larger than the gradient angle α ₂ (α ₂ <α ₁ ) of the outer track portion 71a before the caulking portion 6c is formed.

The large bush 71b is disposed on the vehicle inner side of the second inner ring 71. The large flange 71b has a flat surface in which the outer end surface 710b is substantially orthogonal to the central axis O, and the inner end surface 711b is inclined to the outer track portion 71a side with respect to the outer end surface 710b (the caulking portion 6c of the hub wheel 6). It is formed with an inclined surface inclined with a gradient angle (β ₁ ) with respect to the radial direction of the rotation axis O after formation. The gradient angle β ₁ is set to be larger than the gradient angle β ₂ (β ₂ <β ₁ ) of the large collar 71b (inner end surface 711b) before the caulking portion 6c is formed. The outer peripheral surface of the large collar 71b has a uniform outer diameter D ₁ (for example, D ₁ = 80 mm) along the central axis O, and is formed by a seal surface 712b as a receiving surface that receives the seal member 10. Outer diameter _{D 1} is set to a dimension greater than the outer diameter _D 2 of the large rib 71b before forming the caulking portion _{6c (D 2 <D 1)} .

The gradient angle α ₁ and the gradient angle β ₁ after the formation of the caulking portion 6c are substantially the same as the gradient angle of the outer ring raceway portion 70a of the first inner ring 70 and the gradient angle of the inner end surface 701b. It is an appropriate angle that can be smoothly rolled. In other words, the gradient angle beta ₂ gradient angle alpha ₂ and the inner end surface 711b of the outer race portion 71a before forming the caulking portion 6c is set to a dimension which is optimized by the formation of the caulking portion 6c. Here, “optimized” means that after the formation of the caulking portion 6c, compared to the case where the rolling element 5 is rolled in the state of the gradient angles α ₂ and β ₂ before the formation of the caulking portion 6c. It means that the rolling of the rolling element 5 becomes smoother when the rolling element 5 is rolled in the state of the gradient angles α ₁ and β ₁ at.

The outer diameter D ₁ of the outer peripheral surface of the large flange 71b after the formation of the caulking portion 6c is interference for mounting between the sealing member 10 and the outer member 3, it ensures the sealing property due to the sealing member 10 It is a dimension that provides an appropriate tightening allowance. In other words, the outer diameter D ₂ of the outer peripheral surface of the large flange 71b before forming the caulking portion 6c is set to a dimension which is optimized by the formation of the caulking portion 6c. Here, "it is optimized", compared to the case of mounting the sealing member 10 in a state of the outer diameter D ₂ before formation of the caulking portion 6c, the outer diameter D ₁ after the formation of the caulking portion 6c When the seal member 10 is mounted in this state, it means that the sealing performance of the seal member 10 is more reliable.

The gavel 71 c is disposed on the vehicle outer side of the second inner ring 71. Then, the small rib 71c is a flat plane outer end face 710c is substantially orthogonal to the central axis O, also inclined the inner end surface 711c inclined at a predetermined slope angle beta ₁ to the outer race portion 71a side of the outer end surface 710c It is formed with a surface.

(Configuration of the outer member 3)
The outer member 3 has inner track portions 3a and 3b for rolling the double-row rolling elements 4 and 5, respectively, and a knuckle (not shown) as a component of a suspension device (not shown) on the vehicle inner side. ) And the whole is formed by a cylindrical molded body made of, for example, bearing steel, carburized steel, or the like that opens in both directions of the central axis O.

(Configuration of double row rolling elements 4 and 5)
As shown in FIG. 1, the rolling elements 4 in the vehicle outer side row are formed of tapered rollers and are disposed between the outer raceway portion 70 a of the first inner ring 70 and the inner raceway portion 3 a of the outer member 3. In addition, the roller cage 11 holds the roller. On the vehicle outer side of the rolling element 4, a vehicle outer side seal member 9 is disposed between the seal surface 702 b of the first inner ring 70 and the vehicle outer side opening inner peripheral surface of the outer member 3. .

  The rolling elements 5 in the vehicle inner side row are formed of tapered rollers, are disposed between the outer raceway portion 71 a of the second inner ring 71 and the inner raceway portion 3 b of the outer member 3, and the roller cage 12. Is held so as to be able to roll. On the vehicle inner side of the rolling element 5, a vehicle inner side seal member 10 interposed between the seal surface 712 b of the second inner ring 71 and the vehicle inner side opening inner peripheral surface of the outer member 3 is disposed. .

(Operation of the wheel bearing device 1)
The operation of the wheel bearing device 1 shown in the present embodiment is performed similarly to the operation of the conventional wheel bearing device. That is, when the wheel rotates, this rotation is transmitted to the hub wheel 6 and the inner ring 7, and the hub wheel 6 rotates together with the inner ring 7.

(Manufacturing method of wheel bearing device 1)
Next, a method for manufacturing the wheel bearing device 1 shown in the present embodiment will be described with reference to FIGS. 3 and 4A to 4D. FIG. 3 shows an inner ring forming member. 4A to 4D show the manufacturing procedure of the wheel bearing device.

  The manufacturing method of the wheel bearing device shown in the present embodiment includes “assembly of inner ring forming member”, “attachment of seal member”, “assembly of shaft member (first step)” and “formation of caulking portion ( Since each process of the “second process)” is performed sequentially, each process will be described in turn.

  For the manufacture of the wheel bearing device 1 shown in the present embodiment, a first inner ring forming member 70A (shown in FIGS. 4A and 4B) which becomes the first inner ring 70 (shown in FIG. 1). The second inner ring forming member 71A to be the second inner ring 71 (shown in FIG. 1), and the outer ring forming member 3A to be the outer member 3 (shown in FIG. 1) (FIGS. 4A and 4B) And a shaft member 6A (shown in FIG. 4 (c)) that becomes the hub wheel 6 (shown in FIG. 1).

  The first inner ring forming member 70A includes an inner ring taper portion 700A that serves as an outer race part 70a (shown in FIG. 1) of the first inner ring 70 that rolls the rolling element 4 (shown in FIG. 1), and an inner ring use portion. There are two large and small flanges 701A and 702A that become large flanges 70b and 70c (shown in FIG. 1) of the first inner ring 70 arranged in parallel via the tapered portion 700A. As the first inner ring forming member 70A, a standard material is used because there is little deformation due to the formation of the caulking portion 6c (shown in FIG. 1).

As shown in FIG. 3, the second inner ring forming member 71 </ b> A includes an inner ring taper portion 710 </ b> A that serves as an outer race portion 71 a of the second inner ring 71 for rolling the rolling element 5 (shown in FIG. 1), and the inner ring. There are two large and small flanges 711A and 712A which become the large collar 71b and the small collar 71c of the second inner ring 71 arranged in parallel via the tapered portion 710A. The gradient angle α ₂ of the inner ring taper portion 710A is smaller than the gradient angle α ₁ (α ₂ <α ₁ ) of the outer track portion 71a, and the gradient angle β ₂ of the inner end surface 713A of the large flange 711A is a large flange 71b. Are set to angles smaller than the gradient angle β ₁ (β ₂ <β ₁ ) of the inner end surface 711b. Large and small two flanges 711A, an outer diameter of the large flange 711A which is a large flange 71b of the 712A _{D 2} is set to a dimension smaller than the outer diameter _{D 1 (D 1> D 2} ) of the large flange 71b.

  The outer ring forming member 3A has an outer ring taper portion 30A that becomes the inner raceway portion 3a (shown in FIG. 1) of the outer member 3, and an outer ring taper portion 31A that becomes the inner raceway portion 3b.

  The shaft member 6 </ b> A has a body portion 60 </ b> A that becomes a small diameter body portion 6 b (shown in FIG. 1) in the hub wheel 6, and the axial direction dimension of the body portion 60 </ b> A is set to be larger than the axial direction dimension of the inner ring 7. ing.

“Assembly of inner ring forming member”
As shown in FIG. 4A, the inner ring taper portion 700A is opposed to the outer ring taper portion 30A with the inner ring taper portion 700A opposed to the first inner ring forming member 70A, and the outer ring taper portion 31A is rolled to the outer ring taper portion 31A. The second inner ring forming member 71A is arranged on the inner periphery of the outer ring forming member 3A with the inner ring taper portion 710A facing each other. In this case, when the first inner ring forming member 70A and the second inner ring forming member 71A are arranged on the inner periphery of the outer ring forming member 3A, the first inner ring forming member with respect to the outer ring forming member 3A. 70A and the second inner ring forming member 71A are assembled.

"Attaching the seal member"
As shown in FIG. 4 (b), the seal member 9 is disposed between the outer peripheral surface of the vehicle outer side opening of the outer ring forming member 3A and the outer peripheral surface of the large flange 701A of the first inner ring forming member 70A. The seal member 10 is attached between the inner peripheral surface of the vehicle inner side opening of the forming member 3A and the outer peripheral surface of the large flange 711A of the second inner ring forming member 71A.

"Assembling shaft members"
As shown in FIG. 4C, the body portion 60A of the shaft member 6A is press-fitted and inserted into the first inner ring forming member 70A and the second inner ring forming member 71A. When the body portion 60A of the shaft member 6A is inserted into the first inner ring forming member 70A and the second inner ring forming member 71A, the shaft 60A is pivoted with respect to the first inner ring forming member 70A and the second inner ring forming member 71A. The member 6A is assembled.

"Formation of crimped part"
As shown in FIG. 4 (d), the large flange 711A in the second inner ring forming member 71A using the restraining ring 200 shown in FIG. 4 (c) (constraining ring having an inner diameter D of D = 80.031 mm, for example). The body 60A (shown in FIG. 4 (c)) of the shaft member 6A is controlled using a dedicated jig (not shown) while restricting the deformation of the outer side (shown in FIG. 4 (c)) in the radial direction. The caulking portion 6c is formed by caulking the vehicle inner side insertion end portion 61A toward the outer end surface 714A of the large flange 711A.

In this way, the hub wheel 6, the inner ring 7 and the outer ring (outer member) 3 are provided, the gradient angle α ₁ (shown in FIGS. 2 and 3) of the outer race portion 71a and the gradient angle α of the inner ring taper portion. ₂ gradient angle difference alpha _{1-.alpha. 2} and large rib slope angle beta ₁ of 71b of the inner end surface 711b (shown in FIGS. 2 and 3) and the inner end surface of the large flange 711A 713A (shown in FIGS. 2 and 3) The ratio (α ₁ -α ₂ ) / (β ₁ -β ₂ ) of the angle β ₂ (shown in FIGS. 2 and 3) to the angle difference β ₁ -β ₂ is inequality (α ₁ -α ₂ ) / (β It is possible to manufacture the wheel bearing device 1 set to a ratio satisfying ₁ −β ₂ )> 1.

Thus, keep bearing device 1 and its manufacturing method for the wheel in this embodiment, the slope angle beta ₁ is proper angle of slope angles alpha ₁ and the large rib 71b of the outer race portion 71a (the inner end face 711b) In addition, the second inner ring 71 having an appropriate seal tightening margin on the outer peripheral surface (seal surface 712b) of the large collar 71b is obtained.

  Here, the effect mentioned above is considered in the wheel bearing apparatus 1 and its manufacturing method shown in this Embodiment.

In this discussion, an inner ring forming member 70A, an inner ring forming member 71A, an outer ring forming member 3A, and a shaft member 6A are prepared, and nine types of wheel bearing devices 1 (No. 1 to No. 9) manufactured by the manufacturing method described above are prepared. ), The gradient angle angle difference α ₁ -α ₂ of the outer raceway portion 71a before and after the deformation of the caulking portion 6c formed on the hub wheel 6, and the angle difference β ₁ -β of the gradient angle angle of the inner end surface 711b of the large collar 71b. by measuring _two and variation _D 1 -D ₂ of the outer diameter of the large collar 71b, i.e. the outer race portion 71a gradient angle alpha ₁ and the inner ring for tapered portion slope angle alpha ₂ of the angular difference alpha _1-.alpha. of 710A of ₂ , the angle difference β ₁ -β ₂ between the gradient angle β ₁ of the inner end surface 711 b of the large flange 71 b and the gradient angle β ₂ of the inner end surface 713 A of the large flange 711 A, the outer diameter D ₁ of the large flange 71 b and the outside of the large flange 701 A the amount of change in the diameter _{D 2} It attempted by measuring ₁ -D _2.

  In this case, the caulking portion 6c is formed using a dedicated jig (caulking machine) while restricting deformation of the second inner ring forming member 71A to the radially outer side of the large flange 711A using the restraining ring 200. Thus, the vehicle inner side insertion end portion 61A of the trunk portion 60A of the shaft member 6A is caulked and deformed with a predetermined caulking pressure (12.5 t) toward the outer end surface 714A of the large flange 711A.

As a result, slope angle alpha ₁ and slope angle alpha ₂ of the angular difference alpha _{1-.alpha. 2} of inner ring tapered portion of the outer race portion 71a, the inner end face of the gradient angle beta ₁ and large flanges 711A of the inner end face 711b of the large flange 71b The ratio (α ₁ -α ₂ ) / (β ₁ -β ₂ ) to the angle difference β ₁ -β ₂ of the gradient angle β ₂ of 713A> (α ₁ -α ₂ ) / (β ₁ -β ₂ )> 1 setting the ratio to be, together with the slope angle beta ₁ gradient angle alpha ₁ and the large rib 71b of the outer race portion 71a is set to the proper angle, proper to the outer peripheral surface of the large flange 71b (sealing surface 712b) seal It was confirmed that the second inner ring 71 having a tightening margin was obtained.

This is as shown in Table 1. Table 1 shows the result of considering the above-described effects in the wheel bearing device 1. In Table 1, for example, in the wheel bearing device 1 of No. 3, the angle difference α ₁ -α ₂ of the gradient angle of the outer race 71 a and the angle difference β ₁ -β ₂ of the gradient angle of the big collar 71 b are α ₁ -α, respectively. ₂ = 0.14472 μm, β ₁ −β ₂ = 0.08594 μm, and (α ₁ −α ₂ ) / (β ₁ −β ₂ ) is (α ₁ −α ₂ ) / (β ₁ −β ₂ )> 1 Further, the outer diameter change amount D ₁ -D ₂ on the track side in the large collar 71 _b is D ₁ -D ₂ = 83 μm, and the outer diameter change amount D ₁ -D ₂ on the end face side is D ₁ -D ₂ = 98 μm.

[Effect of the embodiment]
According to the embodiment described above, the following effects can be obtained.

(1) In the present embodiment, the slope angle beta ₂ gradient angle alpha ₂ and the inner end surface 711b of the outer race portion 71a before forming the caulking portion 6c is set to a dimension which is optimized by the formation of the caulking portion 6c ing. For this reason, when the second inner ring forming member 71A receives a caulking force, the inner ring taper portion 710A (outer raceway portion 71a before deformation) is deformed so as to increase, and the gradient angle α of the outer raceway portion 71a is increased. ₁ with is proper angle (angle of the rolling elements 5 can be smoothly roll between the outer raceway 71a and the inner raceway 3b), the slope angle beta ₁ of the inner end face 711b of the large flange 71b It becomes an appropriate angle (an angle at which the rolling element 5 can smoothly roll between the inner end surface 711b of the large basket 71b and the inner end surface 711c of the small basket 71c). Thereby, it becomes possible to smoothly roll the rolling element 5 between the inner track part 3b of the outer member 3.

(2) Further, in the present embodiment, the outer diameter D ₁ of the outer peripheral surface of the large flange 71b after the formation of the caulking portion 6c is the interference for mounting the sealing member 10 between the outer member 3 The dimension is set to an appropriate tightening allowance for ensuring the sealing performance by the seal member 10. Therefore, when the second inner ring-forming member 71A is subjected to crimping forces, [phi] D ₁ becomes an outer diameter [phi] D ₂ is expanded in diameter of the large flange 711A (large rib 71b before deformation), the outer peripheral surface of the large flange 71b When the seal surface 712b is used, an appropriate fastening allowance (a fastening allowance for ensuring sealing performance by the seal member 10) that can appropriately hold the seal member 10 is obtained. Thereby, the space between the outer member 3 and the inner ring 7 can be appropriately sealed from the outside.

(3) In this embodiment, the angular difference alpha _{1-.alpha. 2} gradient angle alpha ₂ of the gradient angle alpha ₁ and the inner ring for tapered portion 710A of the outer race portion 71a (outer raceway part 71a before deformation), the large rib 71b of the inner end face 711b of the slope angle beta ₁ and large flanges 711A inner end surface ratio of the angular difference beta _{1-beta 2} gradient angle beta ₂ of the (undeformed large rib _{71b) (α 1 -α 2)} / ( β ₁ −β ₂ ) is set to a ratio that satisfies the inequality (α ₁ −α ₂ ) / (β ₁ −β ₂ )> 1. When the caulking portion 6c is formed, as shown in Table 1, the change amount of the gradient angle of the inner ring taper portion 710A is larger than the change amount of the gradient angle of the inner end face of the large flange 711A, so that the above inequality is satisfied. by the respective gradient angles are set to, after formation of the caulking portion 6c, the slope angle beta ₁ gradient angle alpha ₁ and the inner end surface 711b of the outer race portion 71a is more appropriate angle. Thus, the inner ring | wheel 71 of the shape which can rotate the rolling element 5 more smoothly can be obtained.
(4) In the present embodiment, the formation of the caulking portion 6c deforms so that the gradient angle of the outer raceway portion 71a of the second inner ring 71 becomes equal to the gradient angle of the outer raceway portion 70a of the first inner ring 70. At the same time, the second inner ring 71 is deformed so that the gradient angle of the inner end surface 711 b of the second inner ring 71 becomes equal to the gradient angle of the inner end surface 701 b of the first inner ring 70. Thus, compared with the conventional vehicle bearing device described with reference to FIG. 6 (gradient angle θ _{1 of the} vehicle inner side taper portion 100 b> gradient angle θ _{2 of the} vehicle outer side taper portion 100 a), It becomes possible to roll the rolling elements 4 and 5 more smoothly in a balanced manner.

  The inner ring forming member, the wheel bearing device, and the manufacturing method thereof according to the present invention have been described based on the above embodiment, but the present invention is not limited to the above embodiment, and the gist thereof is described. The present invention can be implemented in various modes without departing from the scope of the invention, and for example, the following modifications are possible.

(1) In the above embodiment, the case where the second inner ring forming member 71A shown in FIG. 3 is used has been described. However, the present invention is not limited to this. For example, the second inner ring forming member shown in FIG. A member 81A may be used.

  As shown in FIG. 5, the second inner ring forming member 81A is an outer track portion of the second inner ring 71 (shown in FIG. 1) for rolling the rolling element 5 (shown in FIG. 1) on the vehicle inner side. 71a (shown in FIG. 1), an inner ring taper portion 810A, and an inner ring taper portion 810A, and a second inner ring 71 parallel to the large inner ring 71b and a small flange 71c (shown in FIG. 1). The outer diameter of the outer peripheral surface 811b of the large flange 811A, which has the flanges 811A and 812A and becomes the large flange 71b of the two large and small flanges 811A and 812A, is set to a dimension that gradually increases from the outer end surface 813A toward the inner end surface 814A. ing. In other words, the outer diameter of the outer peripheral surface 811b of the large flange 811A is set to a dimension that gradually decreases from the inner ring taper portion 810A side toward the opposite side (outer end surface 813A side).

The dimensional difference between the outer end surface 813A and the inner end surface 814A of the outer peripheral surface 811b of the large flange 811A is set to, for example, a dimensional difference of 10 μm. 5, the reference numeral γ gradient angle of the outer peripheral surface of the large flange 811A, alpha ₂ denotes the slope angle of the inner ring tapered portion 810A, also beta ₂ is the slope angle of the inner end surface 814A, respectively.

When the caulking portion 6c is formed, if the large flange 811A receives a caulking force in the direction of increasing its outer diameter, the outer diameter on the outer end surface 813A side expands with a larger deformation amount than the outer diameter on the inner end surface 814A side, The minimum dimension from an arbitrary point on the outer peripheral surface of the flange 811A to the central axis O becomes substantially equal. Thus, the sealing surface 712b is obtained having a substantially uniform outer diameter [phi] D ₁ along the central axis O, it is possible to retain the sealing member 10 (shown in FIG. 1) more appropriately.

(2) In the above embodiment, the rolling element 4 on the vehicle outer side is disposed between the first inner ring 70 and the outer member 3, and the vehicle inner side is disposed between the second inner ring 71 and the outer member 3. However, the present invention is not limited to this, and the present invention is not limited to this, and the vehicle outer side is provided between the hub wheel and the outer member. The rolling element can also be applied to a type in which rolling elements on the inner side of the vehicle are interposed between the inner ring and the outer member so as to be able to roll.

  DESCRIPTION OF SYMBOLS 1 ... Wheel bearing apparatus, 2 ... Inner member, 3 ... Outer member, 3a, 3b ... Inner track part, 3A ... Outer ring formation member, 30A, 31A ... Outer ring taper part, 4, 5 ... Rolling element, 6 ... Hub wheel, 6a ... Large diameter body, 60a ... Wheel mounting flange, 600a ... Bolt insertion hole, 6b ... Small diameter body, 60b ... Recess, 6c ... Caulking part, 6A ... Shaft member, 60A ... Body 61A ... Vehicle inner side insertion end, 7 ... Inner ring, 70 ... First inner ring, 70a ... Outer raceway part, 70b ... Large collar, 700b ... Outer end face, 701b ... Inner end face, 702b ... Seal face, 70c ... Small edge, 700c ... outer end surface, 701c ... inner end surface, 70d, 71d ... concave groove, 70A ... first inner ring forming member, 700A ... inner ring tapered portion, 701A ... large flange, 702A ... small flange, 71 ... first 2 inner rings, 71a ... outer track part, DESCRIPTION OF SYMBOLS 1b ... Large collar, 710b ... Outer end surface, 711b ... Inner end surface, 712b ... Seal surface, 71c ... Small collar, 710c ... Outer end surface, 711c ... Inner end surface, 71A ... Second inner ring forming member, 710A ... Inner ring taper Part, 711A ... large flange, 712A ... small flange, 713A ... inner end face, 714A ... outer end face, 81A ... second inner ring forming member, 810A ... taper part for inner ring, 811A ... large flange, 812A ... small flange, 813A ... outer end surface, 814A ... inner end surface, 8 ... hub bolt, 9 ... sealing member, 10 ... sealing member, 11 ... cage, 12 ... cage, 100 ... outer ring forming member, 100a ... vehicle outer side taper part, 100b ... Vehicle inner taper part, 101,102 ... Rolling element, 103,104 ... Inner ring forming member, 105 ... Shaft member, 105a ... Vehicle out Side insertion end, 105b ... vehicle inner side insertion end, O ... center axis

Claims (2)

An outer ring having an inner raceway for rolling the tapered roller for bearing, an outer raceway for rolling the tapered roller for bearing between the inner raceway, and a large bowl paralleled via the outer raceway and An inner ring having a small flange, a hub ring having a wheel mounting flange, and a seal member mounted between the inner ring and the outer ring, the caulking of the hub ring on the large collar side of the inner ring A method for manufacturing a wheel bearing device in which an inner ring is fixed to an outer peripheral surface of the hub ring,
An inner ring taper portion serving as the outer raceway portion, an inner ring forming member having a large flange and a small flange serving as an inner ring large flange and a small flange, and an outer ring taper portion serving as the inner track portion of the outer ring. Using the outer ring forming member and the shaft member that becomes the hub ring,
Placing the inner ring forming member with the inner ring taper portion opposed to the outer ring taper portion with the bearing tapered roller interposed therebetween;
Attaching the seal member between a vehicle inner side opening inner peripheral surface of the outer ring forming member and an outer peripheral surface of the large flange of the inner ring forming member;
Inserting the shaft member into the inner ring forming member and inserting the shaft member into the inner ring forming member;
A caulking portion is formed by caulking a vehicle inner side end portion of the trunk portion of the shaft member to an outer end surface of the large flange,
The gradient angle of the outer raceway portion of the inner ring is α ₁ , the gradient angle of the inner end face of the large collar is β ₁ , the gradient angle of the inner ring taper portion of the inner ring forming member is α ₂ , and the large flange when the slope angle of the inner end face and the beta _2, the value of the inequality _{(α 1 -α 2) / (} β 1 -β 2)> 1 of _{(α 1 -α 2) / (} β 1 -β 2) A method for manufacturing a wheel bearing device, which is set to a ratio to be satisfied . The method for manufacturing a wheel bearing device according to claim 1, wherein the outer diameter of the large flange is set to a dimension that gradually decreases from the inner ring tapered portion side toward the opposite side.

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