JP2001180205A - Installation structure of hubcap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate installation of a hubcap to a hat part of a disk, and to prevent detachment of the hubcap in use. SOLUTION: In this structure, an inner slant face 12 of the hat part 11 in the disk 10 is formed with projecting parts 13 projecting toward the axis of the disk 10, while the hubcap 20 has a fitting ring 22 including a lock part 21 extended from its bottom face and locked to the projecting parts 13 on the tip side. The projecting parts 13 are formed separately in the circumferential direction, while the fitting ring 22 is continuously formed over the whole circumference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a wheel cap to be mounted on a hat portion of a disk of an automobile disk wheel.

[0002]

2. Description of the Related Art As a prior art of a structure in which a wheel cap is attached to a hat portion of a disk of an automobile wheel, for example, Japanese Patent Application Laid-Open Nos.
There is one disclosed in Japanese Patent Publication No. 129701.

[0003] The former prior art (Japanese Patent Laid-Open No. 9-86101) discloses, as shown in FIG.
A plurality of engagement holes 4 are provided on the inner inclined surface 3 of the vehicle, and the engagement holes 7 provided at the tips of a plurality of legs 6 projecting from the bottom surface of the wheel cap 5 are formed in the engagement holes 4. And the wheel cap is attached to the hat portion 2.

The latter prior art (JP-A-11-12970)
No. 1), as shown in FIG. 7, a horizontal shelf 3a is formed on an inner slope 3 of a hat portion 2 of a disk 1, and a plurality of engagement holes 4 are provided in the shelf 3a. Thus, strength reduction due to drilling in the inner slope 3 of the hat portion 2 is prevented, and workability of drilling is improved. The wheel cap 5, the leg 6, and the engaging portion 7 have the same configuration as the former prior art.

[0005]

However, as a problem common to the above prior arts, the wheel cap 5 is provided with a plurality of engagement holes 4 provided on the inner slope of the hat portion of the disk 1. Since the wheel cap 5 is attached by fitting each of the plurality of engaging portions 7, it is necessary to position the engaging portion 7 with respect to the engaging hole 4 before attaching the wheel cap 5. There is a problem that it is troublesome.

In order to attach the wheel cap 5 to the hat portion 2 of the disc 1 so as not to be detached, the engaging portion 7 of the wheel cap 5 made of resin must be engaged with the engaging hole 4 of the hat portion 2 of the disc 1. It is necessary to form the engagement portion 7 larger than the engagement portion 7 and hold the engagement portion 7 by a reaction force generated by largely compressively deforming the engagement portion 7 in the engaged state.
Is heated by the heat generated by the brake in addition to the large compressive deformation of the engaging portion 7, and the permanent deformation of the engaging portion 7 is promoted.
Is reduced, and the wheel cap 5 falls off.

Further, since the position of the engagement hole 4 provided in the hat portion 2 of the disk 1 is located near the brake portion, the engagement portion 7 is engaged with the engagement portion 7 while projecting from the engagement hole 4. There is also a problem that the end face interferes with the brake part in some cases and causes a problem.

[0008] An object of the present invention is to provide a mounting structure of a wheel cap to a hat portion of a wheel disc which has solved the above-mentioned problems.

[0009]

According to the present invention, in order to achieve the above object, a first aspect of the present invention is directed to a method for mounting a wheel cap on a hat portion of a disk of an automobile wheel. On the disk side, a convex portion is provided on the inner slope of the hat portion and protrudes toward the axis of the disk, and on the wheel cap side, extends from the bottom surface, and on the tip side, the convex portion is provided. A fitting ring having a locking portion for locking, wherein the convex portion is formed over the entire circumference of the disk, and the fitting ring is divided into a plurality in the circumferential direction and formed. is there.

According to a second aspect of the present invention, a wheel cap is mounted on a hat portion of a disk of an automobile wheel, wherein the disk side is provided on an inner slope of the hat portion, and a shaft of the disk. A convex portion protruding toward the core side is provided, and the wheel cap side includes a fitting ring extending from the bottom surface and having a locking portion on the distal end side that locks to the convex portion, and further includes the convex portion. The disk is formed by being divided into a plurality of pieces in the circumferential direction of the disk, and the fitting ring is formed over the entire circumference of the disk or by being divided into a plurality of pieces in the circumferential direction.

[0011]

According to the above means, a disk having a convex portion formed over the entire circumference uses a wheel cap formed by dividing a fitting ring, while a convex portion is formed by being divided. By fitting the fitting ring at an arbitrary position using a wheel cap formed over the entire circumference or by dividing the disk, the locking portion on the tip side of the fitting ring is Since the wheel cap is deformed and locked at a position over the convex portion, and the wheel cap is easily attached to the hat portion of the disc, there is no need for positioning when attaching.

Further, since the engaging portion on the distal end side of the fitting ring of the wheel cap has a large circumferential length for engaging with the convex portion provided on the disk, the engaging portion is slightly compressed and deformed. In addition, since the locking portion is located on the shaft center side (external side) of the inner slope of the disk, the thermal effect of the brake heat is small. Therefore, since the degree of compressive deformation of the locking portion is small and the heating of the locking portion is also small, the locking portion does not permanently deform, so that the holding force of the locking portion does not decrease.

Further, the position of the locking portion is on the outer side of the inner slope of the disk, and the locking portion is not exposed to the brake portion side due to the disk wall. There is no interference.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, an arc-shaped convex portion 13 protruding toward the axis of the disk 10 is formed on a radially inner slope 12 of the hat portion 11 of the disk 10 made of steel or aluminum alloy. ing. Numeral 14 denotes a hub hole to be attached to the hub of the axle, 15 denotes a bolt hole to attach the wheel to the axle via bolts, and 16 denotes a decorative hole which serves both to radiate heat generated by the brake and to design the wheel.

Reference numeral 20 denotes a wheel cap made of resin.
A fitting ring 22 is formed on the bottom surface of the wheel cap 20 so as to extend from the outer peripheral side of the wheel cap 20. Outside the tip of the fitting ring 22, the fitting ring 22 is formed on the inner slope 12 of the disk 10. An arcuate locking portion 21 that locks on the back side of the convex portion 13 is integrally formed.

Reference numeral 30 denotes a rim. The rim 30 is joined to the disk 10 by welding or the like as shown in the figure, or is integrally formed with the disk 10 by casting or the like.

Next, a convex portion 13 protruding from the inner slope 12 of the hat portion 11 of the disk 10 and the wheel cap 2
The locking structure with the locking portion 21 formed on the tip side of the No. 0 fitting ring 22 will be described.

FIG. 2 shows a first embodiment of the locking structure, in which a convex portion 13 on the disk 10 side is formed in a series of annular shapes over the entire circumference of the inner slope 12 and a wheel cap. The fitting ring 22 on the side 20 is provided with the slit 2 in the axial direction.
This is a case where the light emitting device is divided and provided with 2a.

In the structure of the first embodiment, when the wheel cap 20 is attached to the hat portion 11 of the disk 10, the wheel cap 20 is formed over the entire circumference by pushing the wheel cap 20 into the disk 10 at an arbitrary position. Due to the elasticity of the fitting ring 22, the portion of the fitting ring 22 that is divided into the convex portion 13 deforms inwardly (inside) over the convex portion 13 and returns to the original state before the deformation. The locking portion 21 contacts the rear corner portion 13 a of the projection 13 and is locked, whereby the wheel cap 20 is attached and fixed.

FIG. 3 shows a second embodiment of the locking structure. The protrusion 13 on the disk 10 has a substantially hemispherical shape on the inner slope 12 in a state of being divided (scattered) in the circumferential direction. The fitting ring 22 on the wheel cap 20 side is formed
It is formed in a series over the entire circumference, which is the reverse of the first embodiment.

Also in the structure of the second embodiment, the fitting ring 22 is divided into the projection 13 formed by pressing the wheel cap 20 into the disc 10 at an arbitrary position. The portion that hits each convex portion 13 passes over each convex portion 13 while deforming inward, and the wheel cap 20 passes through the same process as the first embodiment.
Is attached and fixed.

FIG. 4 shows a third embodiment of the locking structure, in which the projection 13 on the disk 10 is formed in a state of being divided into the inner slope 12 similarly to the second embodiment of FIG. And
The fitting ring 22 on the wheel cap 20 side is as shown in FIG.
Are formed in a divided manner in the same manner as in the first embodiment.
3 and the fitting ring 22 are both divided.

In the structure of the third embodiment as well, by pushing the wheel cap 20 into the disc 10 at an arbitrary position, the fitting ring 22 divided into the divided projections 13 is The portion that hits each of the divided protrusions 13 is deformed inward and passes over each of the protrusions 13, and the wheel cap 20 is attached and fixed through the same process as in the first embodiment.

Here, when the wheel cap 20 is attached to the disk 10, the portion where the locking portion 21 of the wheel cap 20 contacts the convex portion 13 of the disk 10 is, as shown in FIG. A portion A and a portion B at the corner 13a on the inner side of the portion 13 are divided. The fitting ring 22 is divided by a narrow slit 22a, so that the circumferential length of the divided fitting ring 22 is increased. As a result, the length in the circumferential direction in which the locking portion 21 abuts on the portions A and B can be made sufficiently long. Therefore, the locking portion 21 is slightly compressed and deformed (for example, about 0.2 mm), so that the wheel cap 20 can be held by a slight reaction force generated thereby.

The position of the locking portion 21 is on the outer side of the inner slope 12 of the disk 10 which is less affected by heat generated from a not-shown brake portion. Therefore, since the amount of deformation of the locking portion 21 is small and the heating of the locking portion 21 is small, permanent deformation of the locking portion 21 does not occur in a practical state, and the holding force of the locking portion 21 on the disk 10 is reduced. The wheel cap 2
The problem of 0 dropout does not occur.

Further, the portion of the locking portion 21 is
Due to the wall, the locking portion 21 is not exposed on the side of the brake section (not shown), so that the locking section 21 does not hit the brake section (not shown) and interfere therewith.

Next, depending on the presence or absence of the convex portion 13 provided on the inner slope 12 of the hat portion 11 of the disk 10,
Table 1 shows the results of a test investigation on the stress applied to zero and the strength life.

[0029]

[Table 1]

As is evident from Table 1, it was confirmed that the provision of the projections 13 hardly increased the stress applied to the disk and decreased the strength life.

[0031]

As described above, according to the present invention, there is no need to position the wheel cap when mounting the wheel cap on the hat portion of the disk, so that there is no need to troubleshoot the mounting of the wheel cap. Since there is no reduction in the holding force of the wheel cap itself after installation, the wheel cap does not fall off in practical use, and furthermore, the locking part of the wheel cap does not interfere with the brake part in practical use. Since there is no problem, there is no problem due to interference. In addition, since no engagement hole is formed in the inner slope of the hat portion, stress concentration does not occur and there is no danger of shortening the life.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an entire wheel cap mounting structure of the present invention.

FIG. 2 is a perspective view of a main part showing a first embodiment of a locking structure of a wheel cap.

FIG. 3 is a perspective view of a main part showing the second embodiment.

FIG. 4 is a perspective view of a main part showing the third embodiment.

FIG. 5 is an enlarged sectional view showing a locking portion of the wheel cap.

FIG. 6 is a cross-sectional view of a main part showing a conventional wheel cap locking structure.

FIG. 7 is a cross-sectional view of a main part showing another conventional wheel cap locking structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Disc 11 Hat part 12 Inner slope 13 Convex part 20 Wheel cap 21 Lock part 22 Fitting ring

Claims (2)

[Claims] 1. A wheel cap for attaching a wheel cap to a hat portion of a disk of an automobile wheel, wherein the disk side has a convex portion provided on an inner slope of the hat portion and protruding toward the axis of the disk. The wheel cap side includes a fitting ring extending from the bottom surface and having a locking portion on the tip side for locking to the convex portion, and further forming the convex portion over the entire circumference of the disc, A mounting structure for a wheel cap, wherein the fitting ring is divided into a plurality in the circumferential direction. 2. A wheel cap for attaching a wheel cap to a hat portion of a disk of an automobile wheel, wherein the disk side has a convex portion provided on an inner slope of the hat portion and protruding toward the axis of the disk. The wheel cap side includes a fitting ring extending from the bottom surface and having a locking portion on the tip side for locking to the convex portion, and further dividing the convex portion into a plurality in the circumferential direction of the disk. A mounting structure for a wheel cap, wherein the fitting ring is formed by dividing the fitting ring over the entire circumference of the disk or in a circumferential direction.