JP2013126871A - Storage method for vehicular hub unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a foreign object from sticking to a to-be-detected member without using a cover for protecting the to-be-detected member.SOLUTION: In the vehicular hub unit, an annular faucet joint part 5b for fitting a wheel at the outside thereof is formed on a wheel-side end 5T of an inner wheel member 7 such that the inner diameter Di of the annular faucet part 5b has a size that allows a vehicular-side end 4T of an outer wheel member 4 of an another hub unit 1 to be inserted in the annular faucet joint part 5b with a given gap formed therein. When the vehicular hub unit is stored, a plurality of hub units 1 are stacked vertically, and the annular faucet joint part 5b of a hub unit 1 on the upper side is fitted on the vehicular-side end 4T of the outer wheel member 4 of a hub unit 1 on the lower side. Hence a to-be-detected member 12a of the hub unit 1 on the lower side is covered with the hub unit 1 on the upper side.

Description

  The present invention relates to a method for storing a vehicle hub unit.

  In an automobile equipped with an anti-lock brake system device (ABS), a sensor device for detecting the rotational speed of a wheel is incorporated in a wheel hub unit (rolling bearing device) in order to control the ABS. Conventionally, such a hub unit includes an outer ring member fixed to the vehicle body side, an inner ring member to which the wheel is fixed, and a rolling element composed of a ball that is freely rollable between the outer ring member and the inner ring member. The sensor device includes a magnetized pulsar ring (detected member) incorporated in a seal device that seals the annular space between the inner ring member and the outer ring member on the vehicle body side, and magnetic poles of the magnetized pulsar ring associated with the rotation of the inner ring member. And a magnetic sensor for detecting a change.

Since the magnetized pulsar ring is provided in an exposed state from the annular space between the inner ring member and the outer ring member, foreign matter such as iron powder adheres after the hub unit is manufactured and assembled to the vehicle. There is. Since such foreign matter attachment affects the detection accuracy of the sensor device, it is necessary to remove the foreign matter attached at the time of assembly to the vehicle.
As a technique that can solve such a problem, Patent Document 1 below discloses a technique that attaches a protective cover that covers the magnetized pulsar ring to the hub unit and prevents foreign matter from adhering to the magnetized pulsar ring by this protective cover. Has been.

JP 2004-176827 A

  However, as in Patent Document 1, the provision of a protective cover that covers the magnetized pulsar ring increases the number of parts, leading to an increase in cost. In addition, a new work for attaching and detaching the protective cover is required. Therefore, the present invention protects the seal device and the detected member incorporated therein from the adhesion of foreign matters without providing a protective cover for covering the detected member such as a magnetized pulsar ring when storing the hub unit. The present invention provides a storage method for a vehicle hub unit.

  The vehicle hub unit storage method according to the present invention includes an outer ring member fixed to the vehicle body side, an inner ring member to which a wheel is fixed, and a plurality of rolling members provided between the outer ring member and the inner ring member. A rolling device, and a seal device provided in an annular space between the outer ring member at the vehicle body side end of the inner ring member, and for fitting the wheel to the wheel side end surface of the inner ring member An annular fitting portion is provided so that the inner diameter of the fitting portion is formed such that the end portion of the outer ring member of the other hub unit can be inserted with a predetermined clearance. In a storage method, with the shaft centers of a plurality of hub units aligned with each other, the fitting portion of one hub unit is fitted to the vehicle body side end portion of the outer ring member of another adjacent hub unit, Stack multiple hub units in the axial direction And wherein the Neru that.

  The vehicle hub unit storage method of the present invention is provided so as to be able to roll between an outer ring member fixed to the vehicle body side, an inner ring member to which a wheel is fixed, and the outer ring member and the inner ring member. A plurality of rolling elements, and a sealing device provided in an annular space between the outer ring member at the vehicle body side end of the inner ring member, and the wheel is fitted on the wheel side end surface of the inner ring member. An annular fitting portion for projecting is formed, and the inner diameter of the fitting portion is formed to a dimension that allows insertion of the end portion of the outer ring member of the other hub unit on the vehicle body side with a predetermined gap. A vehicle hub unit storage method in which a protruding portion that protrudes toward the vehicle body side from the vehicle body side end portion of the outer ring member is formed at the vehicle body side end portion, wherein the shaft centers of the plurality of hub units are aligned with each other. 1 hub unit mating part adjacent The other hub unit is fitted to the vehicle body side end of the outer ring member, the wheel side end of the one hub unit is brought into contact with the protruding portion of the other hub unit, and the plurality of hub units are arranged in the axial direction. It is characterized by stacking.

According to the present invention described above, the inner diameter of the fitting portion of the hub unit is formed such that the end of the outer ring member of the other hub unit on the vehicle body side can be inserted with a predetermined gap. At the time of storage, the fitting unit of one hub unit is fitted and stacked on the vehicle body side end of the outer ring member of the other hub unit, so that the sealing device of the other hub unit is attached to the hub unit of the one hub unit. Covering with the wheel side end surface and the fitting portion, the one hub unit can function as a cover. Therefore, if the seal device is equipped with a member to be detected such as magnetized pulsar ring, when storing the hub unit, it is possible to prevent foreign matter from adhering to the member to be detected without using a special protective cover. Is possible. Even if the member to be detected is not provided in the seal device, the seal device of the other hub unit can be protected by the one hub unit.
In the above description, the terms “vehicle body side end portion” and “wheel side end surface” mean “end portion arranged on the vehicle body side” and “end surface arranged on the wheel side” when the hub unit is assembled to the vehicle, respectively. Does not mean that it is arranged on the wheel side or the vehicle body side even when it is not assembled to the vehicle, and such a thing is required. not.

  Further, in the vehicle hub unit of the present invention, a protruding portion that protrudes toward the vehicle body side from the vehicle body side end surface of the outer ring member is formed at the vehicle body side end portion of the inner ring member. As a storage method, in a state where the shaft centers of a plurality of hub units are aligned with each other, the fitting portion of one hub unit is fitted to the vehicle body side end portion of the outer ring member of another adjacent hub unit, and the 1 A method of stacking a plurality of hub units in the axial direction by abutting the wheel side end of the hub unit with the protruding portion of the other hub unit can be employed.

  With such a configuration, the inner ring member of the one hub unit is placed on the inner ring member (on the protruding portion) of the other hub unit, and this one hub unit is mounted on the other hub unit. A plurality of hub units can be stacked so as not to directly touch the outer ring member. Therefore, the outer ring member of each hub unit is not subjected to a load from other hub units, and the stacked state of the plurality of hub units does not become unstable due to the rotation of the outer ring member.

  According to the present invention, even if there is no protective cover for covering the detected member provided in the hub unit, it becomes possible to protect the detected member from adhesion of foreign matter.

It is sectional drawing of the hub unit for vehicles used for the storage method of the hub unit for vehicles of this invention. It is sectional drawing which shows the state which accumulated the hub unit for vehicles.

Hereinafter, a preferred embodiment of a vehicle hub unit storage method of the present invention will be described with reference to the drawings. In the following description, the case where the present invention is applied to a hub unit for a driven wheel of a vehicle will be described as an example.
FIG. 1 is a cross-sectional view of a hub unit used in the vehicle hub unit storage method of the present invention. In FIG. 1, the left side is the vehicle body side (vehicle inner side), and the right side is the wheel side (vehicle outer side).

  The hub unit 1 includes a double-row angular ball bearing type rolling bearing 2, and the rolling bearing 2 includes an outer ring member 4, an inner ring member 7, and rolling elements 8 composed of a plurality of balls arranged in two rows. I have. Further, the rolling bearing 2 is disposed in an annular space between the outer ring member 4 and the inner ring member 7 that holds the rolling elements 8 at predetermined intervals along the circumferential direction. And sealing devices 11 and 12 for preventing the intrusion of water.

  The outer ring member 4 is a fixed ring fixed to the vehicle body side, and an outer ring raceway 4a is formed on the inner peripheral side thereof. On the other hand, the inner ring member 7 includes an inner shaft 5 and an inner ring constituent member 6, and an inner ring raceway 7 a is formed on the outer peripheral surface of the inner shaft 5 and the inner ring constituent member 6 facing the outer ring raceway 4 a, and the rolling elements 8 are formed on the inner ring. It rolls between the track 7a and the outer ring track 4a.

  On the end surface 5T on the wheel side of the inner shaft 5, an annular spigot part (fitting part) 5b for wheel attachment is formed. The inlay portion 5b has the same axis as the inner shaft 5 and projects from the end surface 5T on the wheel side of the inner shaft 5 to the same side. A flange portion 5c protrudes radially outward from the end surface 5T on the wheel side of the inner shaft 5 toward the vehicle inner side, and a plurality of hub bolts 20 are press-fitted and fixed to the flange portion 5c. A brake disc 31 and a wheel 32 of a wheel are fitted on the outer peripheral surface of the inlay part 5 b and are fixed to the flange part 5 c by the hub bolt 20 and the nut 21.

  A step portion 5d is formed on the vehicle body side of the inner shaft 5, and an inner ring constituent member 6 is fitted on the step portion 5d. Further, the inner ring constituent member 6 is fixed to the inner shaft 5 by a caulking portion 5e obtained by bending and deforming the end of the step portion 5d on the vehicle body side radially outward. The caulking portion 5 e is a protruding portion that protrudes to the same side as the end surface of the outer ring member 4 on the vehicle body side.

  A permanent magnet (a member to be detected) 12a is provided on the sealing device 12 provided on the outer peripheral surface of the inner ring constituent member 6 on the vehicle body side. The permanent magnet 12a is formed in an annular shape using a plastic magnet, and is magnetized so that N poles and S poles having a predetermined width are alternately arranged along the circumferential direction. A magnetized pulsar ring is formed integrally with the material. The side surface of the permanent magnet 12a on the vehicle body side is slightly flush with the vehicle body side end surfaces of the outer ring member 4 and the inner ring component member 6 and slightly back to the wheel side. The permanent magnet 12a rotates with the inner ring member 7, the change of the magnetic pole is detected by the magnetic sensor 40, and the detected value is used to obtain the rotational speed of the wheel.

  A flange portion 4c is formed on the outer peripheral surface of the outer ring member 4, and a bolt hole 4d is formed in the flange portion 4c. An annular knuckle 30 included in a vehicle suspension device (not shown) is fixed to the flange portion 4c by a bolt 33 screwed into the bolt hole 4d.

The hub unit 1 is formed such that the inner diameter Di of the spigot portion 5 b provided on the wheel side end surface 5 T of the inner shaft 5 is larger than the outer diameter Do of the vehicle body side end portion 4 T of the outer ring member 4. Further, the height h3 of the inlay portion 5b is larger than the height h1 of the caulking portion 5e with respect to the end surface of the outer ring member 4 on the vehicle body side, and smaller than the height h2 of the caulking portion 4e with respect to the end surface of the flange portion 4c on the vehicle body side. It is formed as follows.
Therefore, the hub unit 1 can be stacked and stored as shown in FIG. 2 until it is assembled to the vehicle after manufacture.

FIG. 2 is a cross-sectional view showing a state in which a plurality of hub units 1 are stacked.
The plurality of hub units 1 are stacked in the vertical direction with the spigot portions 5b facing downward and the axes aligned with each other.
In the two upper and lower adjacent hub units 1, on the inner side of the spigot portion 5 b of the upper hub unit 1, the vehicle body side end of the outer ring member 4 of the lower hub unit 1 (the vehicle body side when assembled to the vehicle) 4T is inserted. Further, the inner shaft 5 of the upper hub unit 1 is placed on the caulking portion 5 e of the lower hub unit 1. A predetermined gap is formed between the inner peripheral surface of the spigot part 5b and the outer peripheral surface of the vehicle body side end part 4T of the outer ring member 4 based on the difference between the inner diameter Di of the spigot part 5b and the outer diameter Do of the outer ring member 4. It is formed. Since the height h3 of the spigot part 5b is higher than the height h1 of the caulking part 5e, the tip part of the spigot part 5b overlaps radially outward of the vehicle body side end part 4T of the outer ring member 4 (overlap amount). Is denoted by L).

  Therefore, the permanent magnet 12a of the lower hub unit 1 is covered from above by the inner shaft 5 of the upper hub unit 1, and is also covered from the outside in the radial direction by the spigot portion 5b. The upper hub unit 1 is stacked so as not to directly contact the outer ring member 4 of the lower hub unit 1. Since the height h3 of the spigot part 5b is lower than the height h2 of the caulking part 5e, the upper hub unit 1 does not contact the flange part 4c of the outer ring member 4 on the lower stage side.

  As described above, the inner diameter Di of the inlay portion 5b is formed larger than the outer diameter Do of the vehicle body side end portion 4T of the outer ring member 4, and the vehicle body side end of the outer ring member 4 of the lower hub unit 1 is stored during storage. Since the plurality of hub units 1 are stacked in the vertical direction while fitting the spigot part 5b of the upper hub unit 1 to the part 4T, the sealing device 12 and the permanent magnet 12a provided in each hub unit 1 are connected to the upper stage side. The other hub unit 1 can cover the seal device 12 and protect the seal device 12 and prevent foreign matter from adhering to the permanent magnet 12a. The radial gap between the inner peripheral surface of the spigot portion 5b of the upper hub unit 1 and the outer peripheral surface of the vehicle body side end portion 4T of the outer ring member 4 of the lower hub unit 1 suppresses intrusion of foreign matter. The smaller the dimension, the higher the suppression effect. The overlap amount L in the vertical direction between the inlay portion 5b and the vehicle body side end portion 4T of the outer ring increases as the size of the overlap amount L increases. However, these dimensions are not particularly limited.

  The permanent magnet 12a of the uppermost hub unit 1 is in a bare state, but it is possible to prevent foreign matter from being attached by providing a separate protective cover or the like. In this case, one protective cover is required, but since it is not necessary to attach the protective cover to all the hub units 1 as in the conventional case, the number of parts can be reduced, and the trouble of attaching / detaching the protective cover can be reduced. be able to.

  Further, by placing the upper hub unit 1 on the caulking portion (projecting portion) 5e of the lower hub unit 1, the inner shaft 5 of the upper hub unit 1 is connected to the outer ring of the lower hub unit 1. It does not contact the member 4. Therefore, the load of the upper hub unit 1 is not applied to the outer ring member 4, and the loading state does not become unstable due to the rotation of the outer ring member 4.

The storage method of the present invention is not limited to the embodiment described above, and the design can be changed as appropriate.
For example, in the above-described embodiment, the upper hub unit 1 is placed on the caulking portion 5e of the inner ring member 7, but a protruding portion different from the caulking portion 5e is formed, and the upper stage side is formed on the protruding portion. The hub unit 1 may be placed. The present invention can also be applied to the hub unit 1 in which the sealing device 12 is not provided with the permanent magnet (detected member) 12a. The storage method of the present invention can be applied not only when the hub unit 1 is stored in a warehouse or the like, but also when loading on a truck for transport, for example. Further, the stacking direction of the plurality of hub units 1 is not limited to the vertical direction, but can be the horizontal direction.

DESCRIPTION OF SYMBOLS 1 Hub unit, 2 Rolling bearing, 4 Outer ring member, 5b Inlay part (fitting part), 5e Caulking part (projection part), 7 Inner ring member, 12a Permanent magnet (detected member), 40 Magnetic sensor, Di Inlay part Inner diameter, Do Outer ring member outer diameter, h1 protrusion height, h2 protrusion height, h3 spigot height

Claims (2)

An outer ring member fixed to the vehicle body side, an inner ring member to which a wheel is fixed, a plurality of rolling elements provided between the outer ring member and the inner ring member in a rollable manner, and a vehicle body side end of the inner ring member A sealing device provided in an annular space between the outer ring member in the portion,
An annular fitting portion for externally fitting the wheel to the wheel side end surface of the inner ring member is protruded,
The inner diameter of the fitting portion is a storage method for a vehicle hub unit that is formed in a dimension that allows insertion of the end portion of the outer ring member of the other hub unit on the vehicle body side with a predetermined gap.
With the shaft centers of the plurality of hub units being aligned with each other, the fitting portion of one hub unit is fitted to the vehicle body side end of the outer ring member of another adjacent hub unit, and the plurality of hub units are pivoted. A storage method for a hub unit for a vehicle, characterized by stacking in a central direction. An outer ring member fixed to the vehicle body side, an inner ring member to which a wheel is fixed, a plurality of rolling elements provided between the outer ring member and the inner ring member in a rollable manner, and a vehicle body side end of the inner ring member A sealing device provided in an annular space between the outer ring member in the portion,
An annular fitting portion for externally fitting the wheel to the wheel side end surface of the inner ring member is protruded,
The inner diameter of the fitting portion is formed such that the end portion of the outer ring member of the other hub unit can be inserted with a predetermined gap, and the end portion of the inner ring member on the vehicle body side of the outer ring member A method for storing a vehicle hub unit in which a protruding portion that protrudes toward the vehicle body from an end portion is formed,
In a state where the shaft centers of the plurality of hub units are aligned with each other, the fitting portion of one hub unit is fitted to the vehicle body side end portion of the outer ring member of another adjacent hub unit, and the wheel of the one hub unit A method of storing a vehicle hub unit, wherein a side end portion is brought into contact with a protruding portion of the other hub unit, and a plurality of hub units are stacked in an axial direction.

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