JP2016205459A - Manufacturing method of wheel bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve accuracy for slinger positioning on assembling a slinger of a sealing device on a vehicle outer side into a hub shaft, in a wheel bearing device.SOLUTION: A hub shaft 40 has an outer side inner ring raceway surface 101 (outer side raceway surface) on which a rolling body on a vehicle outer side rolls. Between the outer side inner ring raceway surface and a base shaft part 50, provided is an edge part E not contacting with the rolling body. In a slinger press-fit step S2, with the edge part as a reference part, positioning of a slinger 210 to the base shaft part is performed by pressing a jig 300 and press-fitting the slinger into the base shaft part.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a method for manufacturing a wheel bearing device.

  FIG. 11 shows a wheel bearing device 500 disclosed in Patent Document 1. As shown in FIG. The wheel bearing device 500 includes a hub shaft 520 and an outer ring 510 disposed on the outer peripheral side of the hub shaft 520. The hub shaft 520 has a flange 522 at the end on the vehicle outer side. A wheel is attached to the flange 522. The outer ring 510 is fixed to the vehicle fixing member. The hub shaft 520 is supported by the rolling elements 530 so as to be rotatable relative to the outer ring 510.

  In the wheel bearing device 500, it is desirable to prevent intrusion of foreign matter (rain water, muddy water, etc. scattered from the road surface) between the hub shaft 520 and the outer ring 510. Therefore, the gap between the hub shaft 520 and the outer ring 510 is closed from both ends. On the vehicle outer side, as shown in FIG. 11, a sealing device 540 is assembled between the root portion of the flange 522 in the hub shaft 520 and the outer ring 510. The sealing device 540 includes a seal member 560 and a slinger 550 disposed adjacent to the seal member 560. The seal member 560 includes a metal core 570 and a seal body 580. The metal core 570 includes a cylindrical portion 570a that is press-fitted into the inner peripheral surface of the outer ring 510, and an annular portion 570b that protrudes radially inward from the cylindrical portion 570a. A seal body 580 is integrally attached to the annular portion 570b. The seal body 580 is made of an elastic body.

  The slinger 550 includes a slinger cylindrical portion 550a that is press-fitted into the hub shaft 520, and a slinger annular portion 550b that protrudes radially outward from the slinger cylindrical portion 550a. A seal lip 580a, which is the tip of the seal body 580, is slidably contacted with the slinger annular portion 550b. By this contact, the space between the hub shaft 520 and the outer ring 510 is sealed from the vehicle outer side. The slinger 550 is made of stainless steel and is not easily rusted. Therefore, the seal lip 580a in contact with the slinger annular portion 550b is prevented from being in contact with rust and being worn.

  For example, the seal lip 580a may be brought into contact with the flange 522 to seal between the hub shaft 520 and the outer ring 510. In this case, when the flange 522 is rusted by water splashed from a wheel (not shown), the seal lip 580a is worn by contact with the rust. In the technique of Patent Document 1, by providing the slinger 550, this wear can be prevented and the sealing performance is prevented from being lowered.

JP 2013-217419 A

  In the technique of Patent Document 1 (see FIG. 11), if the positional relationship between the seal body 580 and the slinger 550 is too close, the contact pressure of the seal lip 580a with respect to the slinger annular portion 550b becomes excessive and is applied to the wheel bearing device 500. Torque becomes excessive. On the other hand, if the positional relationship between the seal body 580 and the slinger 550 is too far, the contact pressure of the seal lip 580a with respect to the slinger annular portion 550b becomes too small to obtain a desired sealability. By the way, Patent Document 1 does not show a method for positioning the slinger 550. Therefore, the present inventor has found that there is room for improving the positioning accuracy of the slinger in this type of wheel bearing device.

  An object of the present invention is to improve the positioning accuracy of a slinger when a slinger of a sealing device on the vehicle outer side is assembled to a hub shaft in a wheel bearing device.

  In order to solve the above problems, the present invention takes the following means.

  A flange for attaching a wheel is provided at an end on the vehicle outer side, and a base shaft portion, a large-diameter shaft portion, and a small-diameter shaft portion located at the base of the flange are stepped from the flange toward the vehicle inner side. A hub shaft, an inner ring fitted to the small-diameter shaft portion, an outer ring concentrically disposed on the outer peripheral side of the large-diameter shaft portion and the inner ring, the large-diameter shaft portion and the inner ring, and the outer ring A double-row rolling element disposed so as to be able to roll between and a sealing device having a slinger and assembled between the base shaft portion and the outer ring, and the large-diameter shaft portion is a vehicle. A wheel bearing device in which an outer side raceway surface on which the outer side rolling element rolls is provided, and an edge portion that is not in contact with the rolling element is provided between the outer side raceway surface and the base shaft portion. The edge portion is used as a reference portion for the treatment. By then pressing press-fitting the slinger into the base shaft portion has a slinger stuffing step for positioning the slinger relative to the base shaft portion.

  According to the present invention, in the wheel bearing device, when the slinger of the sealing device on the vehicle outer side is assembled to the hub shaft, the positioning accuracy of the slinger can be improved.

It is sectional drawing showing the wheel bearing apparatus. It is sectional drawing which expanded and represented II area | region of FIG. It is sectional drawing which expanded and represented the III area | region of FIG. FIG. 3 is a cross-sectional view illustrating a hub shaft polishing process by a region corresponding to FIG. 2. FIG. 3 is a cross-sectional view illustrating a slinger press-fitting process by a region corresponding to FIG. 2. It is sectional drawing which expanded and represented VI area | region of FIG. It is sectional drawing which represented the outer ring | wheel assembly | attachment process by the area | region corresponding to FIG. It is a perspective view showing a jig. It is sectional drawing showing the example of a change of a jig | tool by the response | compatibility with FIG. It is sectional drawing showing the example of a change of a jig | tool by the response | compatibility with FIG. It is sectional drawing showing a part of vehicle bearing apparatus in a prior art.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The wheel bearing device 1 shown in FIGS. 1 to 3 has a double-row tapered roller bearing structure. The wheel bearing device 1 includes an outer ring 10, a hub shaft 40, an inner ring 20, tapered rollers 31 and 32 that are rolling elements, and a sealing device 200.

  The outer ring 10 has a flange 12. The flange 12 is fixed to a vehicle fixing member (for example, a knuckle) not shown. An outer side outer ring raceway surface 14 and an inner side outer ring raceway surface 16 are formed on the inner peripheral surface of the outer ring 10.

  The hub shaft 40 includes a shaft portion 42 and a flange 44 formed at an end portion of the shaft portion 42 on the vehicle outer side. The shaft portion 42 is disposed concentrically with the outer ring 10 on the inner peripheral side of the outer ring 10. An annular space T that is continuous in the circumferential direction is formed between the shaft portion 42 and the outer ring 10. The flange 44 is located outside the outer ring 10 on the vehicle outer side of the outer ring 10. A wheel (not shown) is fixed to the flange 44 by a bolt B.

  The shaft portion 42 includes a base shaft portion 50, a large diameter shaft portion 70, and a small diameter shaft portion 90 in order from the vehicle outer side to the vehicle inner side. The base shaft portion 50, the large-diameter shaft portion 70, and the small-diameter shaft portion 90 are each formed in a stepped shape whose diameter decreases from the vehicle outer side toward the vehicle inner side.

  The base shaft portion 50 is provided continuously from the base (base) of the flange 44 on the vehicle inner side. The base shaft portion 50 extends in the axial direction of the shaft portion 42. The base shaft portion 50 has a larger diameter than the large diameter shaft portion 70. The base shaft portion 50 faces the vehicle outer side end portion 18 of the outer ring 10. A slinger 210 described later is press-fitted into the base shaft portion 50.

  The large-diameter shaft portion 70 is configured to include a stepped portion adjacent to the base shaft portion 50 and a portion extending in the axial direction of the shaft portion 42 at a position one step down from the base shaft portion 50. The vehicle outer side of the large-diameter shaft portion 70 constitutes an outer side inner ring raceway surface 101 (outer side raceway surface) corresponding to the outer side outer ring raceway surface 14 of the outer ring 10 (see FIG. 2). Between the outer side inner ring raceway surface 101 and the outer side outer ring raceway surface 14, a tapered roller 31 on the vehicle outer side is disposed so as to roll. A plurality of tapered rollers 31 are arranged at equal intervals in the circumferential direction.

  The outer side inner ring raceway surface 101 has a first rolling surface 72 and a second rolling surface 60 (see FIG. 2). The first rolling surface 72 is configured in a conical shape whose diameter increases toward the vehicle outer side. The first rolling surface 72 is in contact with the conical surface 31 a of the tapered roller 31. The second rolling surface 60 is configured by a stepped portion adjacent to the base shaft portion 50. The second rolling surface 60 bends radially outward from the end of the first rolling surface 72 on the vehicle outer side, and extends linearly along the large-diameter end surface 31 b of the tapered roller 31. The second rolling surface 60 is in contact with the large diameter side end surface 31 b of the tapered roller 31.

  In addition, the 2nd rolling surface 60 inclines to the vehicle inner side as it goes to a radial direction outer side (refer FIG. 2, 3). And the edge part of the radial direction outer side of the 2nd rolling surface 60 is following the edge part E demonstrated below (it is connected smoothly). The edge portion E constitutes a bend in which the interval from the second rolling surface 60 to the base shaft portion 50 is bent at an acute angle in a curved shape. The edge portion E is continuous (smoothly connected) to the base shaft portion 50 on the vehicle outer side.

  The edge part E is a part between the 2nd rolling surface 60 and the base shaft part 50, and is a part which the large diameter side end surface 31b of the rolling element 31 does not contact (refer FIG. 3). The edge portion E is formed in a curved surface shape so as to be separated (escape) from the large-diameter side end surface 31b of the tapered roller 31 from the second rolling surface 60 toward the base shaft portion 50. The boundary on the vehicle inner side of the edge portion E is a first intersection C <b> 1 that is an intersection of the curved surface shape of the edge portion E and the linear shape of the second rolling surface 60. The boundary on the vehicle outer side of the edge portion E is a second intersection point C <b> 2 that is an intersection point between the curved surface shape of the edge portion E and the outer peripheral surface of the base shaft portion 50. An area of the edge portion E is between these two intersections C1 and C2. As shown in FIG. 3, the edge portion E is not in contact with the large-diameter side end surface 31 b of the tapered roller 31.

  The small-diameter shaft portion 90 includes a step-shaped portion adjacent to the large-diameter shaft portion 70 and a portion extending in the axial direction of the shaft portion 42 at a position one step down from the large-diameter shaft portion 70 ( (See FIG. 1). The small diameter shaft portion 90 is located at a position corresponding to the inner side outer ring raceway surface 16 of the outer ring 10. The inner ring 20 is fitted to the small diameter shaft portion 90. The tip portion of the small diameter shaft portion 90 is a caulking portion 92 that caulks the inner ring 20. Further, the step-shaped portion adjacent to the large-diameter shaft portion 70 forms an inner ring abutting surface 80 against which the inner ring 20 is abutted.

  An inner side inner ring raceway surface 24 is formed on the outer circumferential surface of the inner ring 20. Between the inner side inner ring raceway surface 24 and the inner side outer ring raceway surface 16, a tapered roller 32 on the vehicle inner side is arranged to roll. A plurality of tapered rollers 32 are arranged at equal intervals in the circumferential direction.

  The sealing device 200 includes a slinger 210 and a seal member 220 (see FIG. 2). The slinger 210 is made of, for example, stainless steel. The slinger 210 has a slinger tubular portion 210a press-fitted into the base shaft portion 50, and an annular slinger annular portion 210b projecting radially outward from the slinger tubular portion 210a. The slinger 210 is located between the vehicle outer side end portion 18 of the outer ring 10 and the base shaft portion 50 of the hub shaft 40.

  The seal member 220 includes a metal core 230 and a seal body 240 made of an elastic body (for example, rubber). The metal core 230 includes a metal core cylindrical portion 230a that is press-fitted into the inner peripheral surface of the vehicle outer side end 18 of the outer ring 10, and a metal core annular portion 230b that protrudes radially inward from the metal core cylindrical portion 230a. Have. A seal body 240 is integrally bonded to the metal core 230 from the vehicle outer side. The seal body 240 has a plurality of seal lips 240a extending from the cored bar annular portion 230b to the vehicle outer side. These seal lips 240a are slidably in contact with the slinger annular portion 210b. By this contact, the annular space T between the vehicle outer side end portion 18 of the outer ring 10 and the base shaft portion 50 of the hub shaft 40 is sealed. In addition, the slinger 210 and the seal body 240 are mutually arrange | positioned in the appropriate position where the contact pressure of the seal lip 240a with respect to the slinger annular part 210b is not excessive and insufficient. Therefore, the sealing device 200 has a desired sealing function.

  Next, a method for manufacturing the wheel bearing device 1 will be described. The wheel bearing device 1 is sequentially set and assembled from members on the vehicle outer side. In the hub shaft 40 before assembly, the caulking portion 92 (see FIG. 1) is not formed at the tip portion of the small diameter shaft portion 90. That is, the tip portion of the small diameter shaft portion 90 extends linearly.

  In assembling the wheel bearing device 1, first, a hub shaft polishing step S <b> 1 (see FIG. 4) is performed. In the hub shaft polishing step S1, the outer peripheral surface from the small-diameter shaft portion 90 (see FIG. 1) of the hub shaft 40 to the proximal end portion of the flange 44 is continuously polished. Naturally, the outer side inner ring raceway surface 101, the edge portion E, and the base shaft portion 50 are also continuously polished. In FIG. 4, the polished region F subjected to the polishing process is indicated by hatching.

  Thereafter, a slinger press-fitting step S2 (see FIG. 5) is performed. In the slinger press-fitting step S2, the slinger 210 is press-fitted into the base shaft portion 50 of the hub axle 40. For this press-fitting, a jig 300 shown in FIG. 8 is used. The jig 300 is configured in a cylindrical shape. The inner peripheral surface of the jig 300 has two different diameters between one end and the other end. The first diameter L1 that is the diameter of the first inner peripheral surface 321 is larger than the diameter of the first rolling surface 72 (see FIG. 5) of the hub shaft 40 and smaller than the diameter of the base shaft portion 50. The second diameter L2 that is the diameter of the second inner peripheral surface 322 is larger than the diameter of the base shaft portion 50 (see FIG. 5) of the hub shaft 40. Specifically, the second diameter L2 is larger than the diameter of the slinger cylindrical portion 210a (see FIG. 5) of the slinger 210 and smaller than the diameter of the leading edge W of the slinger annular portion 210b.

  Between the first inner peripheral surface 321 and the second inner peripheral surface 322, as shown in FIG. 8, an annular pressure regulating surface 304 configured in a step shape between the inner peripheral surfaces 321 and 322. Is formed. The pressing restriction surface 304 is a smooth surface along a plane orthogonal to the axis of the jig 300. The pressing restricting surface 304 has a predetermined width H1 between its inner diameter and outer diameter. The inner diameter of the pressing restriction surface 304 corresponds to the first diameter L1. The outer diameter of the pressing restriction surface 304 corresponds to the second diameter L2. The pressing restricting surface 304 can contact the edge portion E (see FIG. 5) of the hub shaft 40 over the entire circumference.

  The jig 300 forms a slinger pressing surface 302 at the end surface on the second inner peripheral surface 322 side (see FIG. 8). The slinger pressing surface 302 is a smooth surface along a plane orthogonal to the axis of the jig 300. The slinger pressing surface 302 has a predetermined width H2 between its inner diameter and outer diameter. The inner diameter of the slinger pressing surface 302 corresponds to the second diameter L2. The outer diameter of the slinger pressing surface 302 corresponds to the diameter of the outer peripheral surface of the jig 300. This outer diameter is, for example, larger than the diameter of the leading edge W (see FIG. 5) of the slinger annular portion 210b. The outer diameter of the slinger pressing surface 302 may be smaller than the diameter of the leading edge W of the slinger annular portion 210b. The slinger pressing surface 302 can come into surface contact with the slinger annular portion 210b over the entire circumference.

  Regarding the axial direction of the jig 300 (see FIGS. 5 and 8), the positioning dimension P, which is the dimension between the pressing restriction surface 304 and the slinger pressing surface 302, is set as follows. The positioning dimension P is set to a dimension at which the slinger pressing surface 302 is disposed at an appropriate position of the base shaft portion 50 when the pressing restricting surface 304 is positioned at the edge portion E of the hub shaft 40. This appropriate position is a position where the contact pressure of the seal lip 240a of the seal body 240 (see FIG. 7) to be assembled later is not excessive or insufficient when the slinger annular portion 210b of the slinger 210 is disposed at the position.

  As shown in FIG. 5, the slinger 210 is press-fitted into the base shaft portion 50 of the hub shaft 40 by the jig 300. Specifically, the jig 300 is pressed toward the vehicle outer side in a state where the slinger pressing surface 302 of the jig 300 is in contact with the slinger annular portion 210b. The jig 300 is pressed to a position (solid line in FIG. 5) where the pressing restriction surface 304 contacts the edge E of the hub shaft 40. The position of the slinger pressing surface 302 at the time of contact is the attachment position of the slinger 210. Thus, the slinger 210 is positioned with respect to the base shaft portion 50 with the edge portion E of the hub shaft 40 as a reference site, and is attached to the base shaft portion 50.

  FIG. 6 shows an enlarged view of the pressing restriction surface 304 of the jig 300 and the edge portion E of the hub shaft 40 at the time of contact. The pressing restriction surface 304 is in contact with the edge portion E at the contact point Y. The contact point Y is located radially outward from the first intersection C1 on the hub shaft 40. At the position of the contact point Y, the pressing restricting surface 304 is in line contact with the edge portion E over the entire circumference in the circumferential direction.

  As already described, the second rolling surface 60 is inclined toward the vehicle inner side (see FIG. 6). On the other hand, the pressing restriction surface 304 of the jig 300 that abuts on the edge portion E abuts on the edge portion E in a state of being arranged parallel to the radial direction. Therefore, the pressing restriction surface 304 does not contact the second rolling surface 60. Therefore, the jig 300 does not damage the second rolling surface 60. As a result, the tapered roller 31 attached to the outer side inner ring raceway surface 101 in the next step can smoothly roll as in the conventional case.

  After the slinger press-fitting step S2, an outer ring assembling step S3 (see FIG. 7) is performed. In this outer ring assembly step S3, the outer ring 10 is assembled to the shaft portion 42 of the hub shaft 40 together with the tapered roller 31 on the vehicle outer side. The seal member 220 of the sealing device 200 is set on the outer ring 10 in advance before the outer ring 10 is assembled to the hub shaft 40. By assembling the outer ring 10 to the hub shaft 40, the sealing device 200 is assembled between the vehicle outer side end portion 18 of the outer ring 10 and the base shaft portion 50 of the hub shaft 40.

  After the outer ring assembly step S3, an inner ring fitting step (not shown) is performed. In this inner ring fitting step, the inner ring 20 is fitted to the small diameter shaft portion 90 of the hub shaft 40 together with the tapered roller 32 (see FIG. 1) on the vehicle inner side. Thereafter, in a caulking step (not shown), the tip portion of the small-diameter shaft portion 90 is caulked with respect to the inner ring 20 to form a caulking portion 92 shown in FIG. The caulking portion 92 prevents the inner ring 20 from coming off to the vehicle inner side. The assembly of the wheel bearing device 1 is completed through the above steps.

  In the above manufacturing method, when assembling the slinger 210 to the base shaft portion 50 of the hub shaft 40, a reference portion for positioning the slinger 210 is set (see FIG. 5). Therefore, the slinger 210 can be positioned at a certain position corresponding to the positioning dimension P of the jig 300 with respect to the reference portion. Therefore, the slinger 210 can always be positioned at a certain position, and the positioning accuracy of the slinger 210 is improved. The positioning dimension P is set to the appropriate dimension already described. Therefore, the slinger 210 is accurately positioned at an appropriate position where the contact pressure of the seal lip 240a against the slinger annular portion 210b is not excessive or insufficient.

  Note that the outer peripheral surface from the small-diameter shaft portion 90 of the hub shaft 40 to the proximal end portion of the flange 44 is continuously polished before the slinger 210 is positioned. Therefore, the surface processing tolerance for each product is suppressed between the small diameter shaft portion 90 and the flange 44. In the manufacturing method described above, the edge portion E, which is a portion where the surface processing tolerance is suppressed, is used as a reference portion for positioning the slinger 210 (see FIG. 5). Therefore, the displacement of the positioning position of the slinger 210 due to the processing tolerance of the reference part is suppressed. Therefore, the positioning accuracy of the slinger 210 is improved.

  As already described, the edge portion E is used as a reference portion for positioning the slinger 210. The edge portion E is located adjacent to the base shaft portion 50 into which the slinger 210 is press-fitted (see FIG. 5). Therefore, for example, the positioning dimension P of the jig 300 can be set shorter than in the case where the inner ring abutting surface 80 (see FIG. 1) located at a position away from the base shaft portion 50 is used as the reference portion. Since the positioning dimension P can be set short, the dimensional accuracy of the jig 300 is improved. Therefore, the positioning accuracy of the slinger 210 is improved by positioning with the jig 300 having high dimensional accuracy.

  Moreover, the edge part E is formed in the curved surface form (refer FIG. 6). Therefore, for example, compared with the case where the edge portion E is sharply pointed, the contact between the pressing restriction surface 304 of the jig 300 and the edge portion E is stabilized. Accordingly, the radial displacement of the pressure regulating surface 304 when the pressure regulating surface 304 contacts the edge portion E is prevented, and the position of the jig 300 at the time of positioning is stabilized. As a result, the positioning accuracy of the slinger 210 is improved.

  In addition, the edge part E is a site | part which the tapered roller 31 does not contact (refer FIG. 3). Therefore, even if the edge portion E is used as a reference portion for positioning the slinger 210 and the jig 300 is brought into contact with the edge portion E (see FIG. 6), the outer side inner ring raceway surface 101 of the tapered roller 31 is used. Will not hurt. Therefore, in the assembled wheel bearing device 1, the rolling motion of the tapered roller 31 is as smooth as before.

  The embodiment of the present invention has been described above. The manufacturing method of the wheel bearing device of the present invention is not limited to the above-described embodiment, and can be implemented in various other forms. For example, in the above-described embodiment, the rolling elements are the tapered rollers 31 and 32. However, the rolling element may be a ball.

  In the above-described embodiment, the pressing restriction surface 304 of the jig 300 is constituted by a smooth surface orthogonal to the axial direction of the jig 300 (see FIGS. 5 and 8). However, you may comprise a press control surface like the jig | tool 300a shown in FIG. 9, for example. The pressing restriction surface 304 a shown in FIG. 9 is configured as a smooth surface that is inclined so as to spread toward the slinger pressing surface 302 with respect to the axial direction of the jig 300. In this configuration, the pressure regulating surface 304a is inclined with respect to the axial direction, so that the pressure regulating surface 304a contacts the edge portion E at a position radially outward from the contact point Y shown in FIG. Therefore, the contact position with the edge part E of the press control surface 304a will leave | separate from the 2nd rolling surface 60, and the contact with the press control surface 304a and the 2nd rolling surface 60 is prevented further. Therefore, the second rolling surface 60 is prevented from being damaged, and in the wheel bearing device 1 after assembly, the rolling motion of the tapered roller 31 is smooth as before.

  For example, the pressing restriction surface may be configured as a jig 300b shown in FIG. The pressing restriction surface 304b shown in FIG. 10 is configured in an arc shape that follows the curved surface of the edge portion E of the hub shaft 40. In this configuration, the pressing restriction surface 304 b can come into surface contact with the edge portion E, and the pressing restriction surface 304 b comes into contact with the edge portion E so as to fit. Therefore, when the pressing restricting surface 304b comes into contact with the edge portion E of the hub shaft 40, the radial displacement of the jig 300b is prevented, and the position of the jig 300b at the time of positioning is stabilized. Therefore, the positioning accuracy of the slinger 210 is improved. 9 and 10, parts that are considered to have the same or equivalent configurations and functions as those in FIGS. 1 to 8 are assigned the same reference numerals as in FIGS.

DESCRIPTION OF SYMBOLS 1 Wheel bearing apparatus 10 Outer ring 20 Inner ring 31, 32 Tapered roller (rolling element)
31a Conical surface 31b Large-diameter end surface 40 Hub shaft 50 Base shaft portion 60 Second rolling surface 70 Large-diameter shaft portion 72 First rolling surface 90 Small-diameter shaft portion 101 Outer side inner ring raceway surface (outer side raceway surface)
200 Sealing device 210 Slinger 300, 300a, 300b Jig E Edge portion F Polishing region S1 Hub shaft polishing step S2 Slinger press-fitting step S3 Outer ring assembly step

Claims (3)

A flange for attaching a wheel is provided at an end on the vehicle outer side, and a base shaft portion, a large-diameter shaft portion, and a small-diameter shaft portion located at the base of the flange are stepped from the flange toward the vehicle inner side. A hub axle,
An inner ring fitted to the small-diameter shaft,
An outer ring disposed concentrically on the outer peripheral side of the large-diameter shaft portion and the inner ring, and
A double-row rolling element disposed so as to be capable of rolling between the large-diameter shaft portion and the inner ring, and the outer ring;
A sealing device having a slinger and assembled between the base shaft portion and the outer ring,
The large-diameter shaft portion has an outer raceway surface on which the rolling element on the vehicle outer side rolls,
Between the outer raceway surface and the base shaft portion, there is provided a wheel bearing device manufacturing method in which an edge portion that does not contact the rolling elements is provided,
A method of manufacturing a wheel bearing device, comprising: a slinger press-fitting step of positioning the slinger with respect to the base shaft portion by pressing a jig by pressing the jig with the edge portion as a reference site and press-fitting the slinger into the base shaft portion. It is a manufacturing method of the bearing device for wheels according to claim 1,
The rolling element is a tapered roller,
The outer side raceway surface has a first rolling surface that contacts the conical surface of the tapered roller, and a second rolling surface that contacts the large-diameter end surface of the tapered roller,
The manufacturing method of the wheel bearing device, wherein the edge portion is formed in a curved shape so as to be away from the large-diameter side end surface from the outer raceway surface toward the base shaft portion. A method for manufacturing a wheel bearing device according to claim 1, wherein:
The manufacturing method of the wheel bearing apparatus by which the outer peripheral surface from the said large diameter shaft part in the said hub shaft to the said base shaft part is continuously grind | polished.

Images