JPH106703A - Sound proofing wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound proofing wheel capable of providing a high sound proofing effect by disposing an annular member in both surfaces or one surface of a disk in parallel with the disk, connecting the hub side of this annular member to a wheel by a bolt and firmly holding an elastic material between the disk of a rim side and the annular member. SOLUTION: Disk annular members 3 are disposed in both surfaces of the disk 2 of a wheel 1, the inner end part of each annular member 3 is fixed to a hub 4 by a bolt 5 and a rubber elastic material 6 is firmly held between the disk 2 of the wheel 1 and the annular member 3. For the vibration of the disk 2 of the wheel 1, since the vibration of the center part of the disk 2 is largest, the rubber elastic material 6 is held centering in this part. Thus, the annular member 3 functions as a so-called dynamic damper and, even when fluctuation occurs in the relationship between the annular member 3 and the disk 2 of the wheel 1, the rubber elastic material 6 is displaced in a shearing direction, this displacement is absorbed and dispersed by the rubber elastic material 6 and thus the vibration of and the disk 2 of the wheel 1 is damped and noises produced from the wheel is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention has a high soundproofing effect,
The present invention relates to a durable soundproof wheel capable of running at high speed.

[0002]

2. Description of the Related Art In recent years, with the increase in speed of railway vehicles, noise countermeasures have become important. As the analysis of the noise source of the vehicle progressed, it was found that the wheels were the source of the noise. Therefore, various measures have conventionally been taken to prevent the noise generated from the wheels.

As a countermeasure method, there are soundproof wheels and elastic wheels, and the former soundproof wheels include a ring type with rubber and a round ring type. Figure 6 shows this rubber ring type.
As shown in the figure, steel rings 33 and 34 in which rubber 32 is sandwiched are attached to the inner peripheral surface of the rim 31 of the wheel. The round ring type is not shown but a stainless steel ring is attached to the inner peripheral surface of the rim of the wheel. The structure is attached.
However, a problem has been pointed out that the soundproof wheel having such a structure does not have a sufficient soundproofing effect.

On the other hand, the latter elastic wheel is of a type in which rubber 43 is interposed between a rim 41 and a disk 42 of the wheel, and is of a shearing type as shown in FIG. Further, there is a compression / shear type and the like. However, such a conventional elastic wheel has a great soundproofing effect, but is not suitable for high-speed running, and further has problems such as deterioration of rubber.

[0005]

However, the present inventor analyzed the noise generation mechanism of this railway vehicle,
It has been clarified that the vibration of the wheel disk contributes greatly to the generation of vehicle noise, and it has been found that preventing this vibration is effective for soundproofing the vehicle. The inventor of the present invention has been made based on such findings, and has an object to provide a soundproof wheel having high soundproofing effect, high-speed running, and high durability.

[0006]

A first aspect of the present invention comprises a rim having a tread surface formed on the outer periphery of a hub and a rail connected to an axle, and a disk connecting the hub and the rim. An annular member is arranged on both sides or one side of the disk in parallel with the disk, the hub side of this annular member is bolted to the wheel, and a rubber-like elasticity is preferably provided between the disk on the rim side and the annular member. The present invention relates to a soundproof wheel having a body sandwiched therebetween.

A second aspect of the present invention is a rim having treads formed on the outer periphery of a hub and a rail connected to an axle, a disc connecting the hub and the rim, and a disc on both sides of the disc. A brake disk is arranged at a predetermined interval, and the brake disk is a wheel bolted to the wheel on the hub side, and the brake disk contacts the disk surface of the wheel.
The present invention relates to a soundproof wheel characterized in that a rubber-like elastic body is preferably sandwiched between key disks.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a preferred embodiment of the present invention will be described with reference to a first invention. An annular member is brought into contact with a disk of a wheel via a rubber-like elastic body.
With such a configuration, the annular member plays a role of a so-called dynamic damper, and even if there is a relative variation (lateral displacement) between the annular member and the wheel disk, the rubber-like elastic body interposed therebetween is displaced in the shear direction (slip). This displacement is absorbed and diverged by the rubber-like elastic body, so that the vibration of the wheel disk is attenuated, and as a result, the noise generated from the wheel is reduced.

The entire annular member does not necessarily have to be formed in a disk shape. In some cases, the annular member may be formed by disposing a fan-shaped member. Further, the rubber-like elastic body may be entirely disc-shaped, or may be a block-like one, and it is preferable that this rubber-like elastic body is also bonded to one of the disk and the annular member. However, in some cases, the effect is the same even if it is simply sandwiched.

[0010]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples. (First Embodiment) The first embodiment is an embodiment of the first invention. As shown in FIG. 1, a disk-shaped annular member 3 is disposed on both surfaces of a disk 2 of a wheel 1, The wheel 3 has a structure in which an inner edge portion of the wheel 3 is bolted to a hub 4 and a rubber elastic body 6 is sandwiched between the disk 2 of the wheel 1 and the annular member 3. In this case, the vibration of the disk 2 of the wheel 1 is the largest at the center of the disk 2,
It is desirable that the rubber elastic body 6 be sandwiched around this portion.

The rubber elastic body 6 is preferably bonded to both surfaces of the disk 2 and the annular member 3 of the wheel 1. However, the rubber elastic body 6 may be bonded to only one of them or may be simply sandwiched. Furthermore, the shape of the rubber elastic body 6 may be a donut shape or a block shape and may be arranged in a large number. On the other hand, it goes without saying that the annular member 3 may be formed into an annular body by combining fan-shaped members in addition to the donut shape.

According to the first aspect of the present invention, the annular member 3 having the above structure is provided.
Plays the role of a so-called dynamic damper, and even if there is a relative fluctuation (lateral deviation) between the annular member 3 and the disk 2 of the wheel 1, the rubber elastic body 6 interposed therebetween is displaced in the shearing direction (shear vibration). The displacement is absorbed and diverged by the rubber elastic body 6, so that the vibration of the disk 2 of the wheel 1 is attenuated, and as a result, the noise generated from the wheel is reduced.

(Second Embodiment) The second embodiment is an embodiment of the second invention in which an elastic body is sandwiched between a wheel of a Shinkansen wheel and a brake disk, for example. The wheel for the Shinkansen has a structure in which a brake disk 13 is fitted on both sides of a disk 12 of a wheel 11 as shown in FIG. 2, and FIG. Is shown. Such a brake disk 13 is mounted on the wheel side.
A plurality of protrusions 14 which come into contact with the disk 12 of the wheel 11 and
Is fixed to the hub 15 of the wheel 11 by bolts 16.

In this conventional brake disk 13, the convex portion 14 on the inner peripheral surface is in light contact with the disk 12 of the wheel 11, but in the present invention, the convex portion 14 and the wheel 1
A structure in which a rubber elastic body 17 having a high damping performance and having a thickness of, for example, 3 mm is sandwiched between the first disk 12 and the rubber elastic body 17 by compressing the rubber disc 17 by fixing the brake disc 13 with bolts 16. It has become.
Since the brake disk 13 is heated to a high temperature, the rubber elastic body 17 to be interposed is preferably a silicone rubber or the like having high durability, and a rubber elastic body having a high damping performance is preferable in terms of soundproofing effect. That is, a rubber elastic body having heat resistance and high damping performance is actually preferable.

[0015] It should be noted that brakes on actual Shinkansen wheels are
As described above, twelve convex portions 14 on the back surface of the disk 13 are formed radially, so that
Although the rubbers 17 are interposed therebetween, the rubber elastic bodies 17 may be arranged in a donut shape in addition to the above-described arrangement of the 12 points in some cases.

According to the second aspect of the present invention, the brake disk 13 corresponds to the annular member 3 of the first embodiment, and the brake disk 13 serves as a dynamic damper and is generated from wheels. It reduces noise.

[0017]

FIG. 4 shows a wheel (brake) according to the second embodiment.
12 is a graph showing the results of an indoor impact sound test in a case where a rubber elastic body having a thickness of 3 mm is interposed between twelve convex portions 14 between the disc 13 and the disc 12 of the wheel 11). Such a graph has a vertical axis of 1/3 octave band level (dB),
The horizontal axis shows the center frequency (HZ).

The experimental method is as shown in FIG. 5, in which a 553 g steel ball is used to strike the rim of the test wheel in the horizontal direction, and the rim is hit with a microphone at a position 100 mm apart in the horizontal direction. It was implemented in a way to record the sounds that occurred.

FIG. 4A shows wheel data according to the present embodiment, and FIG. 4B shows conventional wheel data. As is clear from this graph, it was found that the wheel of the product of the present invention has a soundproofing reduction effect in almost all areas.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a wheel of the first invention.

FIG. 2 is a longitudinal sectional view showing an embodiment of the wheel of the second invention.

FIG. 3 is a brake disk 13 used in FIG. 2;
2 shows the inner peripheral surface.

FIG. 4 is a graph showing the results of an indoor impact sound test on wheels of Example 2.

FIG. 5 is a schematic diagram of an indoor blow sound test method.

FIG. 6 is a cross-sectional view of a conventional rubber ring type soundproof wheel.

FIG. 7 is a sectional view of a conventional shearing type elastic wheel.

[Explanation of symbols]

1, 11-wheel, 2, 12-wheel disc, 3-ring member, 4, 15-hub, 5, 16-bolt, 6, 17-rubber elastic, 13-bra FIG. 14 is a graph showing the results of an indoor blow sound test on the wheels of Example 2, and FIG. 14 is a graph showing the results of the indoor blow sound tests on the conventional wheel.

Claims (3)

[Claims] 1. A wheel comprising a rim formed on the outer periphery with a tread surface of a hub and a rail connected to an axle, a disk connecting a hub and a rim, and disks on both or one side of the disk. A soundproof wheel characterized in that an annular member is arranged in parallel with the above, a hub side of the annular member is bolted to the wheel, and an elastic body is sandwiched between the disk on the rim side and the annular member. 2. A rim formed on the outer periphery with a tread surface of a hub and a rail connected to an axle, a disc connecting the hub and the rim, and a disc on both sides of the disc at a predetermined distance from the disc surface. A brake disk is provided, the brake disk being a wheel bolted to the wheel on the hub side, wherein an elastic body is sandwiched between the disk surface of the wheel and the brake disk. Soundproof wheels. 3. The soundproof wheel according to claim 1, wherein the elastic body is a rubber-like elastic body.