JP3091990B2 - Fastening structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening structure for fastening a member to be attached to a mounting member by using bolts and nuts, for example, a fastening structure for a vehicle wheel bearing and a brake member.

[0002]

2. Description of the Related Art Conventionally, there has been known a wheel bearing for an automobile as shown in FIGS . The bearing includes an outer ring member 70 attached to a vehicle body (not shown), an inner ring member 71 to which a brake member 73 is attached, and an outer ring member 70.
And a rolling element 72 disposed between the inner ring member 71 and the inner ring member 71. An annular flange 74 is provided at one end of the outer periphery of the inner ring member 71, and five axially penetrating bolt holes 75 are formed in the flange 74 at equal circumferential intervals. Is inserted. A serration 80 is formed at the lower part of the neck of the bolt 76 so that the bolt hole 7 is formed.
5, so that the bolt 76 is press-fitted and fixed in the bolt hole 75. Also flange 7
4 and a brake member 73
Then, the wheel member 77 is fitted, and the nut 78 is screwed into a screw portion formed on the foot portion of the bolt to fix the brake member 73 and the wheel member 77. At this time, the brake member 73 is pressed and fixed to the side surface 79 of the flange 74.

[0003]

However, in the conventional bearing as described above, the bolt 76 has the bolt hole 7.
5, the side surface 79 of the flange 74 on the side where the brake member 73 is mounted tends to undulate around the bolt hole 75, so that the accuracy of the runout of the side surface 79 tends to be affected, and the runout accuracy is poor. As a result, the performance of the brake member 73 and the wheel member 77 is adversely affected. Therefore, it is necessary to pay sufficient attention to the surface runout accuracy of the flange side surface 79, and the management thereof is troublesome. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional structure and to provide a fastening structure capable of minimizing an influence on a side surface of a flange due to press-fitting of a bolt.

[0004]

In order to achieve the above object, the present invention provides a mounting member provided with a radial flange,
A bolt is press-fitted and fixed in an axial bolt hole formed in the flange, a member to be mounted is attached to a foot of the bolt protruding from the flange, and a nut screwed into a screw formed in a foot of the bolt. In the fastening structure in which the attached member is pressed and fixed to the side surface of the flange, the attached member comes into contact with the side surface of the flange circumferentially.
A continuous band-shaped groove is formed, and the bolt hole is formed in the groove.
It is characterized by having been formed . Further, according to the present invention, an annular or substantially annular radially outer flange is provided on the mounting member, and a plurality of bolts are press-fitted and fixed into a plurality of axial bolt holes formed in the flange, and the bolts protruding from the flange are provided. In a fastening structure in which a member to be mounted is attached to a foot portion of the bolt, and the member to be mounted is pressed and fixed to a side surface of the flange by a nut that is screwed into a screw portion formed on a foot portion of each bolt, Forming a circumferentially continuous band-shaped groove on the side surface of the flange with which the
The above-mentioned bolt hole is formed in the groove .

[0005]

According to the above construction, when the bolt is press-fitted into the bolt hole of the radial flange provided on the mounting member and the mounted member is fixed to the flange by tightening a nut, the mounted member comes into contact with the flange. Since a continuous groove including the peripheral edge is formed at the peripheral edge of the bolt hole on the side surface and the bolt hole is located in the groove, the effect of the bolt press-fit remains in the groove and the influence on the flange side surface outside the groove. Can be suppressed as much as possible.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an automobile wheel bearing as an embodiment of a fastening structure according to the present invention. This bearing is an outer ring member 1 attached to a vehicle body (not shown).
And an inner ring member 2 to which a brake member 8 is attached, a rolling element 3 disposed between the outer ring member 1 and the inner ring member 2, a retainer 4 for holding the rolling element 3, and both ends of the outer ring member 1. And a sealing member 5 for sealing the inside of the bearing.

An annular flange 6 extending radially outward is provided at one end of the outer periphery of the inner ring member 2.
Are formed with five bolt holes 7 penetrating in the axial direction at equal circumferential intervals, and bolts 10 are inserted into the bolt holes 7. Serrations 11 are formed in the lower neck portion 10a of the bolt 10 and bite into the inner peripheral surface of the bolt hole 7, whereby the bolt 10 is press-fitted and fixed in the bolt hole 7. Bolts 10 projecting from flange 6 in the axial direction
The brake member 8 and the wheel member 9 are fitted to the foot 10b of the above, and the nut 12 is screwed into the screw portion 10c formed on the foot 10b of the bolt to fix the brake member 8 and the wheel member 9 together. I do. As a result, the brake member 8 is pressed and fixed to the side surface 14 of the flange 6.

On the side of the flange 14 to which the brake member 8 is mounted , a band-like groove 16 continuous on the circumference is formed.
And the bolt hole 7 is located in the band-shaped groove 16.
I have. Due to the band-shaped groove 16, the bolt hole 7 is recessed in the axial direction from the flange side surface 14.

In the above embodiment, the groove area is large.
The effect of fixing the bolt 10 by press-fitting
It is difficult to apply to the surface 14.

[0011] In the embodiment, for the inner ring rotating type wheel
The bearing was explained, but it is applied to the outer ring rotating type wheel bearing.
It may be applied, and the application is not limited to wheel bearings.
Even if it is a fastening place where the degree of mounting area of the mounting member is required
For example, the fastening structure of the present invention is applied. Also e
In the case of bearings for wheels, the flange is also limited to an annular shape.
Even if it is almost annular with notches between bolt holes
Good.

[0012]

As is clear from the above, according to the present invention,
The bolt holes in the radial flange provided on the mounting member
And press-fit the bolts on the
When fixing to the flange, the above-mentioned
Form a continuous band-shaped groove on the circumference of the flange
Since the bolt hole is located in the groove, the groove area is
The effect of the above bolt press-fit stays largely in the groove,
The influence on the outer flange side surface can be suppressed as much as possible.
Therefore, the mounting accuracy of the mounted member is improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment according to the present invention.

FIG. 2 is a side view of a flange portion viewed from an arrow A of FIG. 1;

FIG. 3 is a sectional view taken along line III-III of FIG . 2;

FIG. 4 is a sectional view of a bearing having a conventional fastening structure.

FIG. 5 is a side view of a flange portion viewed from the arrow B in FIG . 4;
is there.

[Explanation of symbols]

Reference Signs List 1 outer ring member 2 inner ring member 6 flange 7 bolt hole 8 brake member 10 bolt 16 groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-157202 (JP, A) JP-A-57-6111 (JP, A) JP-A-3-28003 (JP, A) 161432 (JP, U) Japanese Utility Model 5-19040 (JP, U) Japanese Utility Model 4-42404 (JP, U) Japanese Utility Model Utility Model 3-102619 (JP, U) Japanese Utility Model 63-46241 (JP, Y2) 50-50186 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60B 35/12-35/18

Claims (2)

(57) [Claims] 1. A mounting member having a radial flange,
A bolt is press-fitted and fixed in an axial bolt hole formed in the flange, a member to be mounted is attached to a foot of the bolt protruding from the flange, and a nut screwed into a screw formed in a foot of the bolt. In the fastening structure in which the attached member is pressed and fixed to the side surface of the flange, the attached member comes into contact with the side surface of the flange circumferentially.
A continuous band-shaped groove is formed, and the bolt hole is formed in the groove.
A fastening structure characterized by being formed . 2. A mounting member is provided with an annular or substantially annular radially outer flange, and a plurality of bolts are press-fitted and fixed into a plurality of axial bolt holes formed in the flange. In a fastening structure in which a member to be mounted is attached to a foot portion, and the member to be mounted is pressed and fixed to a side surface of the flange by a nut that is screwed into a screw portion formed on a foot portion of each of the bolts, A continuous band on the circumference on the side of the above flange
A fastening structure , wherein a groove is formed and the bolt hole is formed in the groove .