JP2008007053A - Rolling bearing device for wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device of an outer ring rotating type capable of enhancing the working efficiency of mounting a brake disk on an outer ring member even when the number of projections of a flange for mounting a knuckle is different from the number of parts in which bolts for mounting the brake disk are inserted. <P>SOLUTION: The rolling bearing device B for wheel comprises an inner ring member 2 in which a plurality of flange parts 1 mounted on a vehicle body side are radially formed on an outer circumferential part on one end side in the axial direction, and an outer ring member 5 which is rotatably arranged via a rolling element 3 with a brake disk 4 being mounted thereon. A pedal-shaped opening part 18 with its inner edge formed of curves including cutouts 17 of the number (n+1) extending outwardly in the radial direction where n denotes the number of the flange parts 1 of the inner ring member 2 is formed in the brake disk 4 so as not to be interfered with the flange parts 1 when mounting the brake disk 4 on the outer ring member 5 from one end side of the inner ring member 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wheel rolling bearing device. More specifically, the present invention relates to an outer ring rotating type rolling bearing device for a wheel in which a brake disk is attached to an outer ring member.

  A brake disk, which is one of the members constituting a vehicle brake device, is fixed to a flange formed on an outer peripheral surface of an inner ring member or an outer ring member of a rolling bearing device that rotatably supports a wheel of the vehicle. In order to improve workability when assembling the brake disc to the rolling bearing device or removing the brake disc from the rolling bearing device for replacement, an opening having a predetermined shape through which the wheel mounting flange can pass is provided. It is known to form in the center part of a brake disc (for example, refer patent document 1).

  In Patent Document 1, the outer shape of a flange formed radially outwardly on the outer peripheral surface of the hub wheel on the vehicle outer side and the shape of the center hole of the brake disc are determined so that the brake disc is fixed to the flange. When facing at a phase angle, the brake disc is allowed to pass from the vehicle outer side of the flange to the vehicle inner side, while when rotated by a predetermined angle from the phase angle and facing the brake disc and the flange, A rolling bearing device is described which is defined so as to be opposed to each other in the axial direction.

  In this rolling bearing device, since the brake disk is assembled from the vehicle outer side of the rolling bearing device and is attached to the surface of the hub wheel flange on the vehicle inner side, the rolling bearing device is attached to the vehicle body. Even when the brake disc is detached later, only the brake disc can be detached independently without having to bother to remove the rolling bearing device from the vehicle body.

JP 2003-206967 A

  However, in the rolling bearing device described in Patent Document 1, as apparent from FIGS. 2 to 3, the outer shape of the flange is substantially the same as the shape of the center hole formed in the central portion of the brake disk, and the outer shape of the flange is the same. The size of the center hole is made slightly smaller than the size of the center hole, so that the brake disc can be passed from the vehicle outer side to the vehicle inner side of the flange, and the portion protruding radially outward of the flange to be passed (In other words, the number of member mounting bolts inserted into the projecting portion) and the number of projecting portions of the center hole of the brake disc (in other words, the number of bolts for mounting the brake disc) are the same. This method can be applied only in some cases, and there is a problem that the range of use is limited due to low design freedom.

  The present invention has been made in view of such circumstances, and in the outer ring rotation type rolling bearing device, the number of protrusions of the knuckle mounting flange is the number of parts through which the brake disk mounting bolt is inserted. Even if it is different, it aims at providing the rolling bearing apparatus for wheels which can improve workability at the time of attaching a brake disc to an outer ring member.

A rolling bearing device for a wheel according to the present invention (hereinafter also simply referred to as a bearing device) includes an inner ring member in which a plurality of flange portions attached to the vehicle body side are radially formed on an outer peripheral portion on one axial end side, and the inner ring member A rolling bearing device for a wheel comprising: an outer ring member rotatably disposed via a rolling element on the outer diameter side of the inner ring member and concentrically arranged with the inner ring member to which a brake disk is attached,
When the brake disk is attached to the outer ring member from one end side of the inner ring member, the outer diameter of the inner ring member is set to n so that the number of flange parts of the inner ring member is n. It is characterized in that a petal-shaped opening having an inner edge formed of a curve is formed, including (n + 1) notches extending in the shape of a notch.

In the bearing device of the present invention, the brake disk is directly attached to the outer ring member from one end side (vehicle inner side) of the inner ring member. At this time, a plurality of flange portions for attaching the bearing device to the vehicle body side are formed radially on the outer peripheral portion on the one end portion side of the inner ring member, but the flange portion of the inner ring member is provided on the brake disc. If the number of is n, a petal-like opening having a curved inner edge is formed, including (n + 1) notches extending radially outward, and the curved shape of the inner edge is adjusted. By doing so, when the brake disc passes through the flange portion, the brake disc can be prevented from interfering with the flange portion.
Thereby, after assembling the bearing device, the brake disk can be attached to the bearing device, and workability when the brake disc is attached to the outer ring member can be improved.

  According to the bearing device of the present invention, in the outer ring rotation type rolling bearing device, even if the number of protruding portions of the knuckle mounting flange is different from the number of portions through which the brake disk mounting bolt is inserted, The workability when attaching the disc to the outer ring member can be improved.

Hereinafter, embodiments of a bearing device of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an axial sectional view of an embodiment of the bearing device of the present invention, and FIG. 2 is a view of the bearing device shown in FIG. 1 as viewed from the vehicle inner side. In FIG. 1, the left side is the vehicle inner side, and the right side is the vehicle outer side.
The bearing device B is a bearing device for an axle on the driven wheel side in a vehicle, and an inner ring member in which a plurality of flange portions 1 (see FIG. 2) attached to the vehicle body side are radially formed on an outer peripheral portion on one axial end portion side. 2 and an outer ring member 5 which is rotatably arranged on the outer diameter side of the inner ring member 2 via a ball 3 which is a rolling element and concentrically with the inner ring member 2 and to which a brake disk 4 is attached. It is configured. The inner ring member 2 is composed of an inner shaft 6 and a separate inner ring constituting member 7 fitted to the outer diameter of the inner side of the inner shaft 6. The inner ring constituting member 7 is a bolt 8 is fixed at a predetermined position on the outer periphery of the inner shaft 6.

  Double-row outer ring raceway surfaces 9 a and 9 b are formed on the inner peripheral surface of the outer ring member 5, while the outer ring raceway surfaces are respectively formed on the outer peripheral surface of the inner shaft 6 and the outer peripheral surface of the inner ring constituent member 7. Inner ring raceway surfaces 10a and 10b corresponding to 9a and 9b are formed. The balls 3 are arranged between the raceway surfaces so as to be able to roll while being held by the cage 11 at a predetermined interval in the circumferential direction.

The opening at the vehicle outer side end portion of the outer ring member 5 is covered with a cover 12 made by press-molding a metal such as iron, and an annular space between the inner ring member 2 and the outer ring member 5. Both ends are sealed with seals 13.
Reference numeral 14 denotes a bolt for attaching the brake disc 4 to the outer ring member 5, and 15 denotes an outer ring flange formed on the outer periphery of the vehicle outer side end portion of the outer ring member 5 with a vehicle wheel (not shown). 16 is a bolt for attaching to 16.

  FIG. 3 is a view showing the flange 1 on the outer periphery of the inner ring member 2, the opening 18 of the brake disk 4, and the inner edge or outer edge of the brake disk mounting surface of the outer ring member 5 in the bearing device B shown in FIG. As shown in FIGS. 2 to 3, an opening 18 including a notch 17 extending radially outward is formed in the central portion of the brake disk 4. In FIG. 3, the solid line indicates the outer edge of the flange portion 1 formed on the outer periphery of one end portion of the inner shaft 6 constituting the inner ring member 2, and the broken line indicates the peripheral edge of the opening 18 of the brake disk 4, The alternate long and short dash line indicates the outer edge of the brake disk mounting surface of the outer ring member 5.

The inner edge 18a of the opening 18 is formed of a curve and has a petal shape. Then, the inward projecting portions 19 other than the notches 17 are fixed to the outer ring member 5 by the bolts 14.
The number of flange portions 1 formed on the outer periphery of one end portion of the inner shaft 6 constituting the inner ring member 2 is four, and the number of notches 17 in the brake disk 4 is one more than the number of flange portions 1. 5. In order to improve the balance, the brake disks 4 are fixed to the outer ring member 5 at equally spaced positions (locations) in the circumferential direction, and therefore the inward protruding portions 19 are formed at equal intervals in the circumferential direction. Has been. In other words, the notches 17 of the brake disc 4 are also formed at equal intervals in the circumferential direction.

  The brake disk 4 is attached to the outer ring member 5 of the bearing device B by the bolt 14 from the vehicle inner side of the assembled bearing device B. At that time, the opening 18 of the brake disc 4 needs to pass through the flange portion 1. In this embodiment, two adjacent flange portions 1 of the four flange portions 1 are connected to the brake disc 4. The inner edge of the notch 17 is curved so that it can pass through two adjacent notches 17.

  FIG. 4 is a diagram for explaining a procedure for passing the opening 18 of the brake disc 4 through the flange portion 1. As shown in FIG. 4A, first, the brake disc 4 is inclined to the vehicle outer side, Two adjacent flange portions 1 of the flange portions 1 are passed through two adjacent notches 17 of the brake disk 4. Next, the brake discs in a state where the two flange portions 1 pass through the two notches 17 and the surface of the inclined portion of the brake disc 4 on the vehicle outer side is in contact with a part of the outer ring member 5. 4 is inclined to the vehicle outer side by a portion opposite to the portion inclined earlier (on the opposite side with respect to the center of the brake disc), thereby opening the remaining two flange portions 1 out of the four flange portions 1. Is allowed to pass ((b) of FIG. 4). After passing through the opening 18, the brake disc 4 is rotated by a predetermined angle so that the inwardly projecting portion 19 of the brake disc 4 is disposed at a position where it is attached to the outer ring member 5 ((c) in FIG. 4). . In this way, the brake disc 4 can be attached to a predetermined position of the outer ring member 5 so as not to interfere with the flange portion 1.

  FIG. 5 is a view of a bearing device according to another embodiment of the present invention as seen from the vehicle inner side, and FIG. 6 is a view of the flange portion, brake disc, and outer ring member on the outer periphery of the inner ring member in the bearing device shown in FIG. It is a figure which shows the inner edge or outer edge of a brake disc attachment surface. In FIG. 6, the solid line indicates the outer edge of the flange portion 1 formed on the outer periphery of one end portion of the inner shaft 6 constituting the inner ring member 2, and the broken line indicates the peripheral edge of the opening 18 of the brake disk 4, The alternate long and short dash line indicates the outer edge of the brake disk mounting surface of the outer ring member 5. In this embodiment, the number of flange portions 1 formed on the outer periphery of one end portion of the inner shaft 6 constituting the inner ring member 2 is 3, and the number of notches 17 in the brake disk 4 is greater than the number of flange portions 1. 4 is one more. The outer edge of the flange portion 1 has an isosceles triangle shape, while the peripheral edge of the opening 18 of the brake disc 4 has a cross shape.

  Also in this embodiment, the brake disc 4 is inclined toward the vehicle outer side, and two flange portions 1 positioned at both ends of the base of the isosceles triangle among the three flange portions 1 are adjacent to the brake disc 4. The brake disc 4 can be attached to a predetermined position of the outer ring member 5 so as not to interfere with the flange portion 1 in the same procedure as in FIG.

It is an axial section explanatory drawing of the bearing device concerning one embodiment of the present invention. It is the figure which looked at the bearing apparatus shown by FIG. 1 from the vehicle inner side. It is a figure which shows the inner edge or outer edge of the brake disc attachment surface in the flange part of an inner ring member outer periphery in the bearing apparatus shown by FIG. 1, a brake disc, and an outer ring member. In the bearing device shown in FIG. 1, when the brake disc is attached to the outer ring member, the procedure for passing the opening at the center of the brake disc through the flange portion on the outer periphery of the inner ring member will be described. It is the figure which looked at the bearing apparatus which concerns on other embodiment of this invention from the vehicle inner side. It is a figure which shows the inner edge or outer edge of the brake disc attachment surface in the flange part of an inner ring member outer periphery in the bearing apparatus shown by FIG. 5, a brake disc, and an outer ring member.

Explanation of symbols

1 Flange part 2 Inner ring member 3 Ball (rolling element)
4 Brake disc 5 Outer ring member 6 Inner shaft 7 Inner ring component 16 Outer ring flange 17 Notch 18 Opening 19 Inward projecting part B Bearing device

Claims (1)

An inner ring member in which a plurality of flanges attached to the vehicle body side are radially formed on the outer peripheral part on one end side in the axial direction, and the outer ring side of the inner ring member is rotatable via a rolling element and concentric with the inner ring member An outer ring member to which a brake disk is attached, and a rolling bearing device for a wheel comprising:
When the brake disk is attached to the outer ring member from one end side of the inner ring member, the outer diameter of the inner ring member is set to n so that the number of flange parts of the inner ring member is n. A rolling bearing device for a wheel, characterized in that a petal-like opening having an inner edge formed of a curve is formed, including (n + 1) notches extending in a circle.

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