JP2007038740A - Hub unit fitting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hub unit fitted to a vehicle body to rotatably support a wheel, and restraining an increase in weight and manufacturing cost while coping with the enlargement of a tread. <P>SOLUTION: The hub unit 1 includes: a rolling bearing 2; and a hub wheel 3 disposed concentric with the rolling bearing 2, wherein a spacer 58 is assembled to a carrier 57 as a vehicle body side support member, and further the hub unit 1 is assembled. The spacer 58 includes: a ring-shaped body 58a disposed in contact with the main surface on the vehicle outer side of the carrier 57 formed with a bolt insert hole 32 formed at fit the hub unit 1; and a spacer side spigot 58b projected from the inner peripheral edge of the body 58a toward the vehicle inner side to engage with the inner peripheral surface of the carrier 57. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hub unit mounting structure in which a hub unit that rotatably supports a wheel on a vehicle body is mounted on the vehicle body.

  As a hub unit that is attached to a vehicle body and supports a wheel, there is a hub unit that includes a rotation detector that detects a rotation speed and a rotation direction of a wheel for control of an anti-lock brake system (ABS) or the like (for example, Patent Document 1).

  The rotation detector includes a sensor rotor and a sensor. The sensor rotor is attached to a rotating member of the hub unit, and the sensor is attached to the stationary member side so as to face the sensor rotor. When the speed is detected by the sensor, the rotation state such as the rotation speed and the rotation direction of the wheel is detected.

  FIG. 5 shows a hub unit 100 equipped with a rotation detector. The right side of the figure is the vehicle outer side, and the left side of the figure is the vehicle inner side. The hub unit 100 includes a hub wheel 3 and a rolling bearing 2 formed of a double row angular ball bearing on the outer periphery of the hub wheel 3.

  The hub wheel 3 is formed with an annular hub flange 12. A brake disc rotor and a tire wheel are fixed to the hub flange 12, and the brake disc rotor, the tire wheel, and the hub wheel 3 rotate as a unit.

  The outer ring 22 has a flange portion 30 on the outer peripheral surface, and has an outer ring inlay portion 34 protruding to the vehicle inner side of the flange portion. The hub 57 is fixed to the vehicle body by positioning the vehicle carrier 57 in the radial direction by the outer peripheral surface of the outer ring inlay portion 34 and bolting it to the bolt insertion hole 31 of the flange portion 30. That is, the outer ring inlay portion 34 has a positioning function when the hub unit 100 is attached to the carrier 57 of the vehicle body.

  In the hub unit 100, a sensor rotor 41 having a detected portion is press-fitted and fixed to the inner ring 21, and a cover 44 having a magnetic sensor 53 as a rotation detector is press-fitted to the outer ring 22. The magnetic sensor 53 includes a magnetic detection element 52 and the like. The rotation detector detects the rotation speed and direction of the wheel.

JP 2004-37356 A

  By the way, the tread (distance between the left and right wheels) may be increased from the design and performance aspects. In this case, the basic structure and parts of the hub unit are not changed as much as possible, and a tread is enlarged by incorporating a spacer between the vehicle unit fixing member such as a vehicle carrier and the hub unit. Is called.

  Accordingly, there has been a demand for a hub unit that can cope with the expansion of the tread, minimizes the change in the basic structure of the hub unit, and suppresses increase in weight and manufacturing cost.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a hub unit mounting structure for a hub unit that is mounted on a vehicle body and rotatably supports a wheel. Is to provide.

Means and effects for solving the problems

The hub unit mounting structure of the present invention for solving the above problems is as follows.
An outer ring member that is non-rotatably attached to the vehicle body side, and a hub that is disposed concentrically with the outer ring member and that is rotatably provided around the axis of the outer ring member via a rolling element and is attached to a vehicle wheel and rotates integrally. A hub unit mounting structure for mounting a hub unit including a wheel to a vehicle body via a spacer,
The spacer includes a ring-shaped main body portion disposed in contact with the vehicle outer side main surface of the vehicle body side support member in which a bolt insertion hole for attaching the hub unit is formed, and from the inner periphery of the main body portion to the vehicle inner side. A spacer side inlay portion that protrudes and engages with the inner peripheral surface of the vehicle body side support member;
The hub unit is provided with an outer ring flange portion that protrudes in a radial direction from an end portion of the outer ring member on the outer side of the vehicle inner side, and protrudes in a vehicle inner side main surface of the outer ring flange portion in an axial direction of the vehicle inner side. A hub-side inlay portion is formed, and is arranged in such a manner that the vehicle inner side main surface of the outer ring flange portion abuts on the vehicle outer side main surface of the spacer while being engaged with the inner peripheral surface of the spacer.

  According to the above configuration, the spacer is assembled to the vehicle body side support member, and the hub unit is assembled to the spacer, whereby the hub unit is positioned with respect to the bolt insertion hole on the vehicle body side, and the hub unit is attached to the vehicle body. That is, the hub unit can be assembled to the support member of the vehicle body via the spacer.

  The hub unit mounting structure of the present invention can change the distance between the left and right wheels of the vehicle body according to the thickness of the spacer in the axial direction. That is, if the thickness of the spacer is increased, the distance between the left and right wheels of the vehicle body can be increased without changing the structure of the hub unit and the vehicle body.

  In the spacer, an engagement surface of the inner peripheral surface of the main body portion with the hub side inlay portion and an outer peripheral surface of the spacer side inlay portion are formed as a peripheral surface having the same diameter with respect to the axis. Further, the spacer is integrally formed so that the engagement surface of the inner peripheral surface of the main body portion with the hub side inlay portion and the inlay side inner peripheral surface of the spacer side inlay portion form a step in the radial direction. By forming the spacer in such a shape, the distance (tread) between the left and right wheels can be changed without changing the structure of the vehicle body side support member and the hub unit.

  In the hub unit mounting structure of the present invention, a sensor rotor having a detected portion is attached to an end of the hub wheel on the vehicle inner side, and a cover that covers the inner ring member and the sensor rotor on the hub side inlay portion of the outer ring member; It can be set as the structure where the rotation speed detector was fixed to this cover and opposed to the to-be-detected part of the sensor rotor. Since the structure of the tread is changed according to the thickness of the spacer, there is no change in the structure of the hub side inlay part, so there is no need to change the structure of the sensor rotor and the rotational speed detector according to the change in the tread. Similarly, sensor rotors and rotational speed detectors can be used.

  A stopper portion is formed in the cylindrical portion of the cover, and the cover portion is fitted to the hub side spigot portion with the end surface in the axial direction of the hub side spigot portion serving as a stopper surface. That is, the end surface in the axial direction of the hub side spigot part can be used as a stopper surface.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a mounting structure of the hub unit 1 in the present embodiment. In the figure, the right side is the vehicle outer side, and the left side is the vehicle inner side. As shown in FIG. 1, the hub unit 1 includes a rolling bearing (outer ring member) 2 and a hub wheel (inner ring member) 3 arranged concentrically with the rolling bearing 2, and serves as a vehicle body side support member. A spacer 58 is assembled to 57, and the hub unit 1 is further assembled.

  The hub wheel 3 includes a shaft portion 11 that rotates around the shaft center, and an annular hub flange 12 that protrudes in the radial direction at an end portion of the shaft portion 11 on the vehicle outer side. A rolling bearing 2 formed of an angular ball bearing is mounted on the outer periphery of the shaft portion 11. The hub flange 12 is formed so as to protrude in the radial direction from the end portion of the outer peripheral surface of the hub wheel 3 on the vehicle outer side.

  A brake disc rotor and a tire wheel are fixed to the hub flange 12, and the brake disc rotor, the tire wheel, and the hub wheel 3 rotate as a unit. That is, the main surface 18 of the hub flange 12 is formed with an inlay portion 7 that guides the mounting position of the brake disc rotor and the tire wheel in the radial direction so as to protrude from the main surface 18 toward the vehicle outer side in the axial direction. . The brake disc rotor is brought into contact with the inlay portion 7 to be positioned with respect to the hub flange 12 of the brake disc rotor, and the tire wheel is brought into contact with the inlay portion 7 to be positioned with respect to the hub flange 12 of the tire wheel. Then, a plurality of hub bolts inserted through the insertion holes 15 of the hub wheel 3 are inserted into respective mounting holes formed in the brake disc rotor and the tire wheel, and a plurality of hub nuts are screwed into the respective hub bolts. The wheel is fixed to the hub wheel 3 together with the brake disc rotor. The hub wheel 3 is formed by hot forging from carbon steel for mechanical structure such as S55C, and the inlay portion 7 is formed integrally with the hub wheel 3.

  The rolling bearing 2 is a rolling element that is arranged to roll along an outer ring 22 that is a fixed ring, inner ring raceways 23 and 24 formed on the shaft portion 11, and outer ring raceways 25 and 26 formed on the outer ring 22. The two rows of ball groups 27, the crown-shaped cage 8 holding the ball groups 27 of each row, and the shaft 11 fixed to the outer ring 22 on the side of the hub flange 12. A seal member 29 is included.

  The outer ring 22 is made of hot forged machine structural carbon steel such as S55C, and an outer ring flange portion 30 projects radially from an end of the outer peripheral surface on the vehicle inner side. A bolt insertion hole 31 for inserting a bolt is formed at the position.

  The main surface 30s on the vehicle inner side of the outer ring flange portion 30 is formed with a hub side inlay portion 35 that protrudes in the axial direction on the vehicle inner side and whose inner peripheral surface forms an opening 35a.

  FIG. 2 shows a front view of the spacer 58. The spacer 58 includes a ring-shaped main body 58a disposed in contact with the vehicle outer side main surface of the carrier 57 in which the bolt insertion hole 32 for attaching the hub unit 1 is formed, and a vehicle inner from the inner periphery of the main body 58a. A spacer-side inlay portion 58 b that protrudes to the side and engages with the inner peripheral surface of the carrier 57. Bolt insertion holes 33 are formed on the circumference of the main body 58a at predetermined intervals.

  As shown in FIG. 1, the outer peripheral surface 58g of the spacer side inlay portion 58b is engaged with the inner peripheral surface of the carrier 57, and the vehicle inner side main surface 58d of the main body portion 58a of the spacer 58 is connected to the vehicle outer side main surface of the carrier 57. The spacer 58 can be assembled to the carrier 57. The hub unit 1 is arranged in such a manner that the vehicle inner side main surface 30s of the outer ring flange portion 30 is brought into contact with the vehicle outer side main surface of the spacer 58 while being engaged with the inner peripheral surface 58c of the main body portion 58a of the spacer 58. . The hub unit 1 is fixed to the vehicle body via the carrier 57, and the wheels are rotatably supported with respect to the vehicle body via the rolling bearing 2.

  In the spacer 58, an engagement surface 58c of the inner peripheral surface of the main body portion 58a with the hub side inlay portion and an outer peripheral surface 58g of the spacer side inlay portion 58b are formed as a peripheral surface having the same diameter with respect to the axis. . That is, as shown in FIG. 3, the length r1 from the axis 9 to the engagement surface 58c and the length r2 from the axis 9 to the outer peripheral surface 58g are formed equal. Accordingly, in FIGS. 1 and 3, the engagement surface 58 c and the outer peripheral surface 58 g are drawn parallel to the axis 9 and at an equal distance. The spacer 58 is integrated with the engagement surface 58c of the inner peripheral surface of the main body portion 58a with the hub side inlay portion 35 and the inner side surface 58n of the spacer side inlay portion 58b forming a step in the radial direction. It is formed. Further, the spacer 58 is formed such that the vehicle inner side main surface 58d of the main body 58a is closer to the vehicle inner side than the axial end surface 35s on the vehicle inner side of the hub side inner portion 35 of the hub unit 1. By forming the spacer 58 in such a shape, the distance (tread) between the left and right wheels can be changed without changing the structure of the vehicle body side support member such as the carrier 57 and the hub unit 1.

  That is, the engagement surface 58c of the inner peripheral surface of the main body portion 58a of the spacer 58 with the hub side inlay portion and the outer peripheral surface 58g of the spacer side inlay portion 58b are formed as a peripheral surface having the same diameter with respect to the axis 9. Therefore, the hub unit 1 can be attached to the vehicle body without changing the structures of the carrier 57 and the hub unit 1.

  In the hub unit 1, a sensor rotor 41 having a detected portion is press-fitted and fixed to the hub wheel 3. A cover 44 provided with a magnetic sensor 53 as a rotation detector is press-fitted into the outer ring 22. In the cover 44, a stopper portion 48 is formed on the outer side in the radial direction of a cylindrical portion 45 formed in a cylindrical shape. The axial end surface 35s can be used as an engaging surface for other members, and the stopper portion 48 is engaged with the axial end surface 35s of the hub side inlay portion 35, and the cover 44 is the inner peripheral surface of the hub side inlay portion 35. Is attached. The sensor rotor 41 includes an annular cored bar 42 and a magnetic body 43. The magnetic sensor 53 includes a magnetic detection element 52 and the like. The rotation detector detects the rotation speed and direction of the wheel. Even when the thickness d of the spacer 58 is different, the cover 44 is attached to the inner peripheral surface of the hub side inlay portion 35 in such a form that the stopper portion 48 is engaged with the axial end surface 35s of the hub side inlay portion 35. Therefore, the extension length of the annular cored bar 42 from the end surface on the vehicle inner side of the hub hole 3 is unchanged.

  As described above, in the spacer 58, the engagement surface 58c of the inner peripheral surface of the main body portion 58a with the hub side inlay portion 35 and the inlay side inner peripheral surface 58n of the spacer side inlay portion 58b are stepped in the radial direction. Since the spacer 58 is integrally formed in a formed manner and is disposed in non-contact with the axial end surface 35s of the hub side spigot portion 35, a stopper portion formed on the cylindrical portion 45 of the cover 44 on the axial end surface 35s. 48 is engaged, and the axial end surface 35s can be used as a stopper surface. The distance (tread) between the left and right wheels can be changed by the thickness d in the axial direction of the spacer, and the other structure of the hub unit 1 does not need to be changed in accordance with the tread. The hub unit 1 is not limited to the carrier 57 but may be a knuckle or the like as a vehicle body side support member.

  The thickness d of the spacer for changing the tread will be described with reference to FIG. FIG. 5 shown in the prior art shows a case where the tread has a normal length, and the hub unit is directly assembled to the carrier 57 without the spacer 58 interposed therebetween. On the other hand, FIG. 4A shows the case where the hub unit 1 is assembled to the vehicle body using the spacer 58 having a relatively short thickness d. Also in this case, the spacer 58 is formed such that the vehicle inner side main surface 58d of the main body portion 58a is closer to the vehicle inner side than the axial end surface 35s on the vehicle inner side of the hub side inner portion 35 of the hub unit 1. Has been.

  As shown in FIG. 4B, the tread can be further expanded by using the spacer 58 having a long thickness d. That is, the tread can be changed without changing the structures of the vehicle body side support members such as the hub unit 1 and the carrier 57 by changing the thickness d of the main body formed in a ring shape.

  As described above, the structure in which the spacer 58 is assembled to the carrier 57 and the hub unit 1 is further assembled to the spacer 58 makes it possible to easily change the tread depending on the thickness d of the spacer 58. Since the tread can be expanded without changing the structure of the hub unit 1 or the like, an increase in cost can be prevented.

The figure which shows the hub unit attachment structure as one Example of this invention. The front view of a spacer. The figure explaining the surface relationship of a spacer. The figure which shows the other Example of a spacer. The figure which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hub unit 2 Rolling bearing 3 Hub wheel 22 Outer ring 30 Outer ring flange part 35 Hub side spigot part 35s Axial direction end surface 41 Sensor rotor 44 Cover 48 Stopper part 57 Carrier 58 Spacer 58a (Spacer) Main part 58b (Spacer side) Spacer side Inner portion 58c Inner peripheral surface 58d on the main body side Vehicle inner side main surface 58g Outer peripheral surface 58n of spacer side inlay portion Inner side inner peripheral surface

Claims (6)

An outer ring member that is non-rotatably attached to the vehicle body side, is arranged concentrically with the outer ring member, and is provided rotatably on the outer ring member around an axis via a rolling element, and is rotated integrally with a vehicle wheel. A hub unit mounting structure for mounting a hub unit including a hub wheel to the vehicle body via a spacer,
The spacer includes a ring-shaped main body portion disposed in contact with a vehicle outer side main surface of a vehicle body side support member in which a bolt insertion hole for mounting the hub unit is formed, and a vehicle inner portion from an inner periphery of the main body portion. A spacer side inlay portion that protrudes to the side and engages with the inner peripheral surface of the vehicle body side support member,
The hub unit is provided with the outer ring flange portion that protrudes in a radial direction from an end portion on the vehicle inner side of the outer peripheral surface of the outer ring member, and the vehicle inner side is provided on a main surface of the outer ring flange portion on the vehicle inner side. A hub side spigot portion that protrudes in the axial direction on the side is formed, and the vehicle inner side main surface of the outer ring flange portion is brought into contact with the vehicle outer side main surface of the spacer while being engaged with the inner peripheral surface of the spacer. A hub unit mounting structure characterized by being arranged in a shape.   The hub unit mounting structure according to claim 1, wherein the distance between the left and right wheels of the vehicle body can be changed by the thickness of the spacer in the axial direction.   The spacer is formed such that an engagement surface of the inner peripheral surface of the main body portion with the hub side inlay portion and an outer peripheral surface of the spacer side inlay portion are the same diameter with respect to the axis. The hub unit mounting structure according to 1 or 2.   The spacer is integrally formed such that the engagement surface of the inner peripheral surface of the main body portion with the hub side inlay portion and the inlay side inner peripheral surface of the spacer side inlay portion form a step in the radial direction. The hub unit mounting structure according to claim 3.   A sensor rotor having a detected portion is attached to an end portion of the hub wheel on the vehicle inner side, a cover covering the inner ring member and the sensor rotor is provided on the hub side inlay portion of the outer ring member, and the cover The hub unit attachment structure according to any one of claims 1 to 4, wherein a rotation speed detector is attached so as to be fixed and opposed to the detected portion of the sensor rotor. The stopper part is formed in the cylindrical part of the cover, The stopper part is fitted to the hub side inlay part by using the axial direction end face of the hub side inlay part as a stopper surface. Hub unit mounting structure.

Images