JPS61166702A - Wheels for motorcycle and the like - Google Patents

Abstract

PURPOSE:To reduce noise produced at a time of braking a wheel where a hub, a rib, and a spoke which are formed separately and assembled, by forming the spoke out of a pair of sheet metals, on the inner surface of which vibration isolators are arranged. CONSTITUTION:A front wheel 1 of a motorcycle is braked in such a way that a brake disk 6 which is formed as an integral part of the front wheel 1 and is arranged on the both sides of the front wheel, is held with pressure by a brake 7 arranged on a front fork 4. Here, the front wheel 1 is composed of a wheel 8 and a tubeless tire 9, and the wheel 8 comprises a hub 10, a rim 11, and a spoke 12, each of which is formed separately. And the rim 11 and the hub 10 are made of lightweight alloys such as magnesium alloy, aluminum alloy, and the like. On the other hand, the spoke 12 is formed out of a pair of sheet metals 13 and 14 in a disc form of the aluminum alloy and others. In addition, vibration isolators 21 are stuck on both inner surfaces of each of sheet metals 13 and 14 facing each other at an equal interval. And they are placed in several spots along the circumference so as to prevent possible resonance produced in the spoke 12 at a time of braking.

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to wheels for motorcycles, etc., in which a hub, a rim, and spokes are molded separately, and the hub and rim are connected and fixed via the spokes. be.

(Prior Art) As is well known, the wheels of motorcycles, tricycles, etc. have a hub, a rim, and spokes that are molded separately.
Is there something to connect and fix these? Incidentally, as disclosed in Japanese Utility Model Publication No. 53-26724, the spokes of a wheel are sometimes constructed from a pair of metal plates, and such a wheel is sometimes provided with a braking device.

(Problems to be Solved by the Invention) When braking is performed using a braking device equipped on a wheel made of such a sheet metal, a vibration forcing force with a relatively high frequency is generated, causing brake squeal, and This vibrational force is transmitted to the spokes made of sheet metal, which causes the spokes to resonate and make the brake squeal even louder.

This invention was made in view of these circumstances.

The purpose is to minimize the resonance that occurs in the spokes during braking, and to reduce brake squeal caused by vibration as much as possible.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention consists of spokes formed separately from the hub and the rim, which are formed of a pair of disk-shaped sheet metals, and the inner surfaces of the sheet metals are It is characterized by the provision of anti-vibration material.

(Function) In the present invention, the spokes that connect the hub and rim of the wheel are composed of a pair of disk metal plates, and a vibration isolating material is provided on the inner surfaces of the pair of metal plates. Therefore, during braking, due to the sliding between the friction member of the braking device and the rotating body,
Even if a vibration forcing force with a relatively high frequency occurs and is transmitted to the sheet metal, the vibration can be effectively suppressed by the vibration isolating material, and brake squeal due to resonance is reduced. In addition, since the vibration isolating material is installed inside the pair of sheet metal, it is not visible from the outside and does not spoil the appearance of the wheel.
It can be used for a long time because it does not get wet with water or mud.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

First, the embodiment shown in FIGS. 1 to 3 will be described. In the figures, reference numeral 1 is a front wheel, 2 is a rear wheel, the front wheel 1 is a steering wheel, and the rear wheel 2 is a driving wheel. The front wheel 1 is rotatably mounted on an axle 3, and both ends of the axle 3 are supported by lower ends 4a of a front fork 4. The front fork 4 is rotatably provided on a head pipe 5 of the vehicle body.

Brake discs 6 are provided on both sides of the front wheel l so as to rotate together with the front wheel l. This brake disc 6 is braked by pressure applied by a brake device fi7 provided on the front fork 4.

The front wheel 1 is composed of a wheel 8 and a tubeless tire 9, and a hub lO, a rim 11, and spokes 12 constituting the wheel 8 are each formed separately. The rim 11 and the hub 1O are made of a light alloy such as a magnesium alloy or an aluminum alloy.

On the other hand, the spokes 12 are composed of a pair of disk-shaped metal plates 13.14, and the metal plates 13.14 are formed of, for example, aluminum.

A hub 10 of the wheel 8 is rotatably supported by an axle 4 provided on the front fork 4. Further, the rim 11 is formed to have a relatively narrow width, and the tubeless tire 9 is fitted into a circumferential groove 11a formed on the outer periphery of the rim 11. A convex connecting portion 10a is formed at the axial center of the hub 10, and a similarly convex connecting portion 1 is formed at the inner peripheral portion of the rim.
1b is formed. These connecting parts 10a, llb
The sheet metal 13.14 is attached from both sides to its inner circumference 14a,
14a and outer peripheral parts 13b, 14b are fitted and connected and fixed with rivets 15 and 16, respectively.

The metal plates 13 and 14 are located near the center of the wheel and face each other at a predetermined distance from the center of the wheel. In this way, the sheet metal 13 and 14 are located near the center of the wheel, and the hub 1
By connecting 0 and the rim 11, the braking device 7
installation space is created. The brake disc 6 has its inner circumference joined to both ends of the hub lO, and is fixed by a mounting hole 17 inserted in the axle direction. This It11
The single-motion disc 6 is located at a predetermined distance from the center of the wheel, the spokes 12 have been moved to the center of the vehicle body, and space for the braking device 7 has been secured, making the hub lO and axle 4 shorter than before. It is moved to the center of the wheel and fixed.

braking! The caliper 18 constituting the 017 is supported by a bracket 19 provided on the front fork 4, and the caliper 18 is inserted into the wheel width formed between the rim 11 and the hub 10 with a part of its main body inserted into the wheel width formed between the rim 11 and the hub 10. It straddles the brake disc 6 from the outer periphery. A pair of friction members 20 are disposed inside the caliper 18 so as to face the braking surfaces on both sides of the brake disc 6, and the friction members 20 slide on the brake disc 6 to perform braking.

On the inner opposing surfaces of the pair of metal plates 13 and 14 constituting the spokes 12, vibration isolating materials 21 are adhered at three locations in the circumferential direction at equal intervals. This vibration isolating material 21 is molded from rubber or soft resin, and when vibrations due to a relatively high frequency vibration forcing force generated on the brake disc 6 during braking are transmitted to the sheet metal 13 and 14 via the hub lO, .14 is attenuated and suppressed by the elastic force of the vibration isolating material 21, and the sheet metal 1
3.14 prevents brake squeal from becoming louder due to resonance.

Next, the operation of this embodiment will be explained.

A pair of metal plates 13 and 14 constitute the spokes 12, and these metal plates 13 and 14 are arranged facing each other at a predetermined interval in the vicinity of the center of the wheel.

As a result, a space for arranging the brake device 7 is secured near the center of the wheel, and the brake disc 6 can be fixed to the hub 10 at a position closer to the center of the wheel.

Therefore, the spokes 12 of the wheel 8 move toward the center of the wheel, which causes the brake disc 6 and the braking device 7 to move further toward the center of the wheel.

The hub 10 and axle 3 are shortened. Therefore, the distance between the pair of front forks 4 becomes narrower, making the vehicle smaller and lighter.

During braking, the friction member 20 of the caliper 18 is connected to the wheel 8.
It comes into pressure contact with the brake disc 6 which rotates together with the brake disc 6. The vibrations generated in the brake disc 6 during this braking are transmitted to the sheet metal 13, 14 via the hub 10.

The sheet metal 13.14 begins to vibrate, but this vibration force is attenuated by the elastic force of the vibration isolator 21, and the sheet metal 13.1 vibrates during braking.
4, vibration is prevented from occurring and resonating. Moreover, since the vibration isolators 21 are arranged at equal intervals, vibrations of the sheet metals 13 and 14 can be suppressed uniformly.

Since the vibration isolating material 21 is bonded to the inside of the pair of sheet metals 13 and 14, it is not visible from the outside and does not damage the appearance, and water, mud, etc. do not adhere to the inside, so it can be used for a long time. Can be used in good condition for a long time.

4 and 5 show another embodiment, in which the vibration damping material 21 is composed of a liquid gasket bonded in a ring shape to the inner surfaces of a pair of metal plates 13, 14. This liquid gas get is formed by applying silicone rubber, acrylic resin, synthetic rubber, epoxy resin, etc. in a ring shape to the inner surface of the panel, and the liquid gasket attaches to the sheet metal 13.14 with its adhesive strength. It's glued. This vibration isolating material 21
Since it is provided in a ring shape, there is no unbalance in the rotation of the wheel 8, and vibrations of the metal plates 13 and 14 can be suppressed over the entire surface.

FIGS. 6 and 7 show still other embodiments.

The vibration isolating material 21 shown in FIG. 6 is sandwiched between a pair of sheet metals 13 and 14, and it is sufficient that the vibration isolating material 21 is bonded to the sheet metal 13 or the sheet metal 14 at least on the negative side, and The vibration isolating material 21 is made of, for example, rubber, soft synthetic resin, urethane foam, or the like. If one side of the vibration isolating material 21 is positioned on the sheet metal 13 or the sheet metal 14, and the sheet metal is brought into contact with or adhered to the other side, the two can be accurately positioned.

Therefore, when bonding separate vibration isolating materials 21 to the sheet metal 13.14, it is necessary to position each sheet metal 13.14 with high accuracy, which is a troublesome work if there are many vibration isolating materials 21. In this embodiment, it is only necessary to adhere to one side, which simplifies the work.

The vibration isolating material 21 shown in FIG. 7 is composed of a dynamic damper. That is, the dynamic damper is composed of an elastic body 22 made of rubber or the like, and a weight 23 made of an iron plate, a lead plate, etc. attached to the elastic body 22. When the sheet metals 13 and 14 try to vibrate, the dynamic damper is consumed by the single layer 3!23 vibrating, and the vibrations of the sheet metals 13 and 14 are damped. This dynamic damper can freely WRM the size and shape of the elastic body 22 and the size and shape of the weight 23 according to the movement characteristics of the sheet metal 13 and 14.

In the embodiment described above, brake discs 6 are provided on both sides of the wheel 8. Although the brake Jlt device 7 that straddles the brake disc 6 is provided, the brake disc 6 and the brake device H7 may be provided on one side. In this case, the brake disc 6 and the brake IItII 7 are located on the wheel center side, and the brake The moment generated around the steering axis is reduced, further improving maneuverability and stability.

(Effects of the Invention) As described above, in this invention, the spoke is composed of a pair of sheet metals, and the vibration isolating material is fixed to the opposing surfaces of the pair of sheet metals.
When braking, vibration force is generated from the sliding of the braking device, and even if the resulting vibration is transmitted from the wheel hub to the sheet metal,
The vibration isolating material suppresses the sheet metal from being photographed, making it possible to prevent resonance caused by vibrations between the braking device and spokes. Moreover, since this vibration-proofing material is provided on the inner surface of the sheet metal, it does not damage the appearance, and since it is difficult for water or mud to adhere to it, it can be used satisfactorily for a long period of time.

[Brief explanation of the drawing]

Figure 1 is a side view of the motorcycle, Figure 2 is an enlarged sectional view of the main parts, Figure 3 is a right side view of Figure 2, Figure 4 is a sectional view of the main parts of another embodiment, and Figure 5. are side views of Figure 4, Figures 6 and 7.
The figure is a sectional view of essential parts showing still another embodiment. 6.--Brake disc 7.-braking device 8.--
Wheel 10...Hub 11...Rim
12... Spoke 13. 14... Sheet metal 21... Vibration isolating material patent applicant Yamaha Motor Co., Ltd. Figure 2 Figure 3 Figure 4 Figure 6 Figure 6 f-s

Claims (1)

[Claims] A wheel for a motorcycle, etc., in which a hub, a rim, and spokes are molded separately, and the hub and rim are connected and fixed by the inner and outer circumferences of the spokes, and the spokes are made of a pair of sheet metals. The wheels of motorcycles, etc., have anti-vibration material provided on the inner surface of this pair of metal sheets.