JPH0211202Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a mounting structure between a disk wheel and a center cap.

[Prior art]

Conventionally, the mounting structure between the disc wheel and the center cap is as follows:
As shown in the above publication and FIG. 1, a bent portion 3 with a flange is formed on the circumferential side of the center hole 2 of the disc wheel 1, and a hub 9 to be fitted onto the disc wheel 1 is formed. A plate spring 7 is attached to the inner wall surface 5 of the center cap 4 covering the terminal part via a screw 6, and the locking part 8 of the plate spring 7 is locked to the bent part 3 of the disc wheel 1 and fixed. Ta.

[Problem that the invention attempts to solve]

However, in the case of such a conventional assembly method, it is necessary to shave off the end surface 9a of the hub 9 in order to secure a space for the locking part 8 of the leaf spring 7, and as a result, the disc wheel 1 and the hub 9 It has become impossible to center the ring due to the fitting. Furthermore, even if the disk wheel 1 and the hub 9 were forced to fit together, the inner diameter on the side of the disk wheel 1 was not straight, making it difficult to press or iron, making it impossible to improve accuracy.

As mentioned above, since the disc wheel 1 and the hub 9 are fitted without centering, there is a problem in that the vehicle body, steering wheel, etc. vibrate during high-speed driving due to eccentric rotation of the tires. Ta.

Also disc wheel 1 and center cap 4
Since the fitting part with the hub 9 is not designed with sealing performance in mind, water and dirt can enter through the fitting part, rusting the hub 9, screws, nuts, etc., and making reattachment difficult. It was hot.

In another conventional example, as shown in FIGS. 2 and 3, protrusions 10 for locking the center cap 4 are provided at multiple locations (4 to 5 locations) on the outer peripheral surface of the center cap 4. The wheel nut 11 that fixes the center cap 4 is a special part provided with a protrusion 12, which causes a problem of increased costs.

In the figure, 13 is a drive shaft, 14 is a brake rotor, 15 is a bearing, 16 is an oil seal, 17 is a washer, 18 is a castle nut, 19 is a splitting pin, and 20 is a wheel pin.

[Purpose of invention]

This invention was devised by focusing on the conventional problems, and its purpose is to effectively prevent water, dirt, etc. from entering between the disc wheel and the center cap, and to By centering the hub and disc wheel and fitting them with precision, vibrations of the vehicle body, steering wheel, etc. are reduced, and the center cap can be assembled better, improving the aesthetic appearance and making it cheaper to manufacture. The present invention provides a mounting structure for a disk wheel and a center cap configured in the following manner.

[Means to solve the problem]

In order to achieve the above object, this invention includes a hub attached to the tip of the drive shaft, and a fitting part of the center cap that covers the end of the hub via a disk wheel attached to the outer periphery of the end of the hub. In the mounting structure, a cylindrical bent part that fits on the outer circumference of the end of the hub is formed at the peripheral edge of the center hole of the disc wheel, and the bent part and the center cap are connected to each other. An annular hard rubber with a ring-shaped plate spring embedded therein is interposed between the fitting part and the ring-shaped plate spring so that the outer edge of the ring-shaped plate spring faces the inner wall surface of the fitting part of the center cap. However, the gist is that the edge portion on the inner edge side is disposed so as to face the outer circumferential surface of the bent portion.

[Effect of invention]

This device is constructed as described above, and a vertical cylindrical bent portion formed at the periphery of the center hole of the disc wheel is fitted onto the outer peripheral surface of the cylindrical hub attached to the tip of the drive shaft. This allows accurate centering, and by interposing a ring-shaped hard rubber with a ring-shaped plate spring embedded between the bent part and the fitting part of the center cap, the distance between the two parts is perfect. Furthermore, the ring-shaped leaf spring is sealed so that when a force is applied in the direction in which the fitting part of the center cap comes out of the bent part of the disc wheel, the outer edge of the leaf spring and the inner edge Since the part bites into the inner wall surface of the fitting part and the outer peripheral surface of the bent part of the center cap, producing a so-called wedge effect, it is possible to effectively prevent the center cap from falling off from the bent part of the disc wheel.

[Example of idea]

Embodiments of this invention will be described below based on the accompanying drawings.

Note that the same components as those of the conventional example explained in FIG.

In FIG. 4, 1 is a disk wheel, 4 is a center cap, 9 is a hub attached to the front end of the drive shaft 13, and 14 is a brake rotor.

The end portion 14a of the brake rotor 14 and the bent portion 3 formed at the peripheral edge of the center hole portion 2 of the disc wheel 1 are centered on the vertical cylindrical surface 9a of the outer peripheral surface on the tip side of the hub 9. mated in good condition.

The bent portion 3 of the peripheral edge of the center hole 2 formed in the disc wheel 1 is formed into a vertical cylindrical surface with high inner diameter accuracy by so-called ironing or the like using a press machine.

The outer peripheral surface of the bent portion 3 formed at the peripheral edge of the center hole 2 of the disc wheel 1, and the step-shaped center cap 4 attached to this outer peripheral surface so as to cover the tip end portion of the hub 9. An annular hard rubber 32 in which a spring 31 having a truncated conical cross section and a ring shape is embedded is interposed between the fitting portion 4a and the fitting portion 4a.

As shown in FIGS. 5 and 6, the leaf spring 31 has wavy uneven portions 33 on its upper and lower edges.
a, 33b are formed, and the edge portion 31a on the outer edge side of the uneven portion 33b of the leaf spring 31 faces the inner wall surface of the fitting portion 4a of the center cap 4, and the edge portion on the inner edge side on the uneven portion 33a side faces the inner wall surface of the fitting portion 4a of the center cap 4. The portion 31b is disposed so as to face the outer peripheral surface of the bent portion 3 and is embedded inside the hard rubber 32.

Therefore, when a force is applied to the ring-shaped leaf spring 31 in the direction in which the fitting part 4a of the center cap 4 comes out of the bent part 3 of the disc wheel 1,
The edge portion 31a on the outer edge side of the leaf spring 31 bites into the inner wall surface of the fitting portion of the center cap 4, and the edge portion 31b on the inner edge side bites into the outer peripheral surface of the bent portion 3, creating a so-called wedge effect.
This effectively prevents the center cap 4 from falling off the bent portion 3 of the disc wheel 1.

Further, the flange portion 9b of the hub 9, the end portion 14a of the brake rotor 14, and the support portion 1a of the disc wheel 1 are fixed via a wheel pin 20 and a wheel nut 11.

Next, put center cap 4 on disc wheel 1.
We will explain the operation of assembling the .

First, the vertical cylindrical surface 9a of the outer peripheral surface on the tip side of the hub 9
Then, the end portion 14a of the brake rotor 14 and the bent portion 3 formed at the peripheral edge of the center hole portion 2 of the disc wheel 1 are fitted in a centered state. Next, the annular hard rubber 32 with the plate spring 31 embedded therein is fitted into the stepped fitting part 4a of the center cap 4 in the state shown in FIG. The disc wheel 1 is inserted into the bent portion 3 of the disc wheel 1 while being pushed against the elastic force of the disc wheel 1. Then, the center cap 4 is elastically deformed by the hard rubber 32.
At the same time, the edge portion 31a on the outer edge side of the uneven portions 33a, 33b of the leaf spring 31 bites into the inner wall surface of the fitting portion of the center cap 4, and at the same time, the edge portion 31b on the inner edge side It also bites into the outer circumferential surface of the bent portion 3 to abut and lock.

Therefore, the stepped fitting portion 4a of the center cap 4 and the bent portion 3 of the disc wheel 1
The space between them is reliably sealed by the elastic deformation of the hard rubber 32, and it is possible to prevent water, dirt, etc. from entering from the outside.

On the other hand, if a force is applied in the direction in which the fitting part 4a of the center cap 4 comes out of the bent part 3 of the disc wheel 1 in the above-mentioned state, the outer edge side of the leaf spring 31 as described above The edge portion 31a of the center cap 4 bites into the inner wall surface of the fitting portion of the center cap 4, and the edge portion 31b on the inner edge side bites into the outer peripheral surface of the bent portion 3, creating a so-called wedge effect. This can effectively prevent it from easily falling off from the bent portion 3.

Next, FIG. 7 shows another embodiment of the shape of the hard rubber 32. In this embodiment, the end portion 4b of the center cap 4 and the disc wheel are attached to the upper and lower ends of the hard rubber 32 in which the leaf spring 31 is embedded. Positioning protrusions 32a and 32b that engage with the end portion 3a of the bent portion 3 of 1 are formed.

According to this embodiment, the hard rubber 32 in which the leaf spring 31 is embedded can be easily positioned.

In addition, FIGS. 8 and 9 show a ring-shaped leaf spring 3.
The periphery of the center cap 1 is formed into a wave shape, the length L of the hard rubber 32 is shortened, and the protruding length of the center cap 4 is shortened when the center cap 4 is fitted to the disc wheel 1.

[Effect of idea]

As mentioned above, this idea involves attaching a hub to the tip of the drive shaft, and attaching a fitting part of the center cap that covers the end of the hub via a disk wheel attached to the outer periphery of the end of the hub. A mounting structure is provided in which a cylindrical bent part is formed on the peripheral edge of the center hole of the disc wheel to fit on the outer circumference of the end of the hub, and the bent part and the center cap fit together. An annular hard rubber having a ring-shaped plate spring embedded therein is interposed between the ring-shaped plate spring and the ring-shaped plate spring so that the ring-shaped plate spring has an outer edge facing the inner wall surface of the fitting part of the center cap; Since the edge portion on the inner edge side is disposed so as to face the outer circumferential surface of the bent portion, the following excellent effects can be achieved.

(a) It is possible to effectively prevent water and dirt from entering between the bent part of the disc wheel and the fitting part of the center cap, thereby preventing water from entering the hub nut part and the occurrence of rust. can.

(b) Since the hub and disc wheel are accurately centered and fitted together, vibrations of the vehicle body, steering wheel, chassis, etc. can be significantly reduced.

(c) It is possible to standardize wheel nuts and reduce costs.

(d) Since the center cap can be easily assembled, the assembly work efficiency can be improved, the aesthetic appearance can be improved, and it can be manufactured at low cost.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional views showing a conventional mounting structure between a disk wheel and a center cap, Figure 3 is a side view taken in the direction of the - arrow in Figure 2, and Figure 4 is a disk wheel implementing this invention. 5 is a sectional view showing the attachment state of the elastic member, FIG. 6 is a vertical sectional view of the leaf spring, and FIG. 7 is a second embodiment of the elastic member. 8 is a sectional view showing a third embodiment in which an elastic member is assembled, and FIG. 9 is a sectional view of the elastic member shown in FIG. 8. 1... Disk wheel, 2... Center hole, 3... Bent part, 4... Center cap,
4a... Fitting portion, 9... Hub, 13... Drive shaft, 31... Leaf spring, 31a... Edge portion on outer edge side, 31b... Edge portion on inner edge side, 32...
...Hard rubber.

Claims (1)

[Scope of utility model registration request] A hub 9 is attached to the tip of the drive shaft 13, and a fitting portion 4a of a center cap 4 is attached so as to cover the end portion of the hub 9 via the disk wheel 1 attached to the outer peripheral portion of the end of the hub 9. The mounting structure is such that a cylindrical bent portion 3 that fits on the outer periphery of the end of the hub 9 is formed at the peripheral edge of the center hole 2 of the disc wheel 1,
An annular hard rubber 32 in which a ring-shaped leaf spring 31 is embedded is interposed between the bent portion 3 and the fitting portion 4a of the center cap 4 so as to be able to fit tightly together.
The ring-shaped leaf spring 31 is arranged such that the edge portion 31a on the outer edge side faces the inner wall surface of the fitting portion of the center cap 4, and the edge portion 31b on the inner edge side faces the outer peripheral surface of the bent portion. A mounting structure between the disc wheel and center cap.