JP2003039902A - Wheel with built-in suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the height of a vehicle body floor in a vehicle, and to increase the cabin space in the vehicle. SOLUTION: A wheel has a hub 1 which is formed substantially cylindrical and connected to an axle A, and a rim 2 which is positioned on the outer circumferential side of the hub 1 to interpose a tire T, a plurality of oil chambers R are demarcated in the circumferential direction of a plurality of bulkhead parts 3 by a plurality of bulkhead parts 3 formed of an elastic material which is deformed when the external force is applied between the outer circumference of the hub 1 and the inner circumference of the rim 2, and oil chambers R facing each other across the bulkhead parts 3 are communicated via orifices 3a formed in the bulkhead parts 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel incorporating a suspension.

[0002]

2. Description of the Related Art A suspension in a vehicle absorbs vibrations from a traveling road surface while supporting a vehicle body. However, the suspension is arranged so that the vehicle height can be lowered as much as possible. I am trying.

However, even if the damper forming the suspension is formed in the rotary type instead of the cylindrical type, as long as it is arranged below the floor of the vehicle body,
The floor of the car body cannot be lowered as a whole.

That is, for example, in a vehicle in which a person with a wheelchair gets on and off, the floor of the vehicle body should be as low as possible, and the space inside the vehicle should be as wide as possible. Even if the suspension is a rotary type and is made compact, it is preferable that the suspension is not disposed below the floor of the vehicle body.

The present invention was devised from the above viewpoint, and its object is to make the floor of a vehicle body as low as possible and to make the vehicle interior space as wide as possible. It is to provide wheels with built-in suspension that are optimal for doing so.

[0006]

In order to achieve the above-mentioned object, a wheel with a built-in suspension according to the present invention has a hub, which is basically formed in a substantially cylindrical shape and connects wheel shafts, and the hub. Is a wheel having a rim positioned on the outer peripheral side of the rim for interposing a tire, the elastic being deformed between the outer periphery of the hub and the inner periphery of the rim when an external force is applied and restored when the external force is canceled. It is assumed that the plurality of partition walls made of a material define a plurality of oil chambers in the circumferential direction, and that the oil chambers facing each other with the partition wall interposed therebetween are communicated with each other through an orifice formed in the partition wall.

Further, in the above structure, more specifically, the elastic material is made of rubber and the partition wall has a wall thickness capable of preventing relative displacement in the lateral direction between the hub and the rim. Suppose

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the illustrated embodiments. A suspension built-in wheel according to the present invention is formed in a substantially cylindrical shape as shown in FIG. Hub 1 for connecting the
2 which is positioned on the outer peripheral side of the tire and through which the tire T is interposed
And have.

At this time, the hub 1 corresponds to a portion called a disc in a conventional wheel, which is not shown, but this disc is integrated with the rim 2, but in the present invention. The rim 2 is separated.

By the way, the rim 2 is formed in the same manner as in the existing wheel in the manner in which the tire T is interposed.

By the way, in the suspension built-in wheel according to the present invention having the hub 1 and the rim 2 as described above, as shown in FIG. 2, an external force acts between the outer circumference of the hub 1 and the inner circumference of the rim 2. While partitioning a plurality of oil chambers R in the circumferential direction by a plurality of partition walls 3 made of an elastic material that are sometimes deformed and restore when the external force is eliminated, two neighboring oil chambers R with the partition wall 3 interposed therebetween are used as partition walls. The portion 3 is communicated with the open orifice 3a.

At this time, in this embodiment, the elastic material is a rubber material and the partition wall portion 3 can prevent the lateral relative displacement between the hub 1 and the rim 2 in the left-right direction in FIG. It is said to have a thick wall.

Therefore, the partition wall portion 3 made of this rubber material
Will be deformed when an external force is applied to alleviate the external force, that is, will function as a spring body in the suspension.

The orifice 3a is, as shown in the drawing,
Although it is supposed that the partition wall portion 3 is directly perforated, it may be formed of a pipe having a hole that exhibits a predetermined throttling effect inside, although not shown in view of its functioning.

When the orifice 3a is formed of a pipe, it is advantageous in that a predetermined throttling effect can be guaranteed even when the partition 3 is deformed so as to be crushed.

Further, since it is sufficient for the above-mentioned orifice 3a to exhibit a predetermined throttling effect as a result, instead of being constituted by the so-called round hole shown in the drawing, for example, as shown in a phantom diagram in FIG. The gap S may be included.

In order to ensure a predetermined diaphragm effect by the gap S, it is advantageous in forming the gap S that the partition wall portion 3 is formed in a vertically divided manner. .

Therefore, the above-mentioned orifice 3a absorbs energy when oil passes therethrough, and functions as a damper in the suspension.

For filling the oil chamber R with oil, various measures may be selected.

Therefore, in the suspension built-in wheel formed as described above, the partition wall 3 made of an elastic material exerts a shock absorbing function as a spring body, and the orifice 3a formed in this partition wall 3 is provided. It will function as a damper to absorb energy.

Further, neither the partition wall portion 3 functioning as a spring body nor the orifice 3a functioning as a damper is provided outside, that is, the suspension is not provided outside.

Therefore, in the vehicle, since the suspension is not distributed outside the wheel, the vehicle floor can be set low and the vehicle interior space can be set wide.

That is, in a conventional vehicle using a wheel, an elastic body and a damper constituting a suspension are arranged between a wheel shaft and a vehicle body. Becomes higher,
The space inside the car becomes smaller.

From the above, in the vehicle using the suspension-incorporated wheel according to the present invention, more effective setting is possible, for example, when the setting is made so that each wheelchair can get on and off. There are advantages.

On the other hand, regarding the operating condition of the wheel with built-in suspension according to the present invention, the weight of the vehicle body depends on the wheel axle A.
Hub 1 unless it is acting on hub 1 via
It rotates about a so-called shaft center which is the center of the partition wall 3, and at this time, the partition wall portion 3 is not deformed and oil cannot pass through the orifice 3a.

On the other hand, when the tire T is mounted on the rim 2 and the wheel shaft A of the vehicle is used by being linked to the hub 1, the weight of the vehicle body is transferred via the wheel shaft A. And acts on the hub 1.

As a result, the partition wall portion 3 located below the hub 1 is deformed so as to contract, and conversely, the partition wall portion 3 located above the hub 1 is deformed to extend.

When the wheel with built-in suspension rotates around the above-mentioned axis as the vehicle travels, the partition wall 3 repeats deformation and restoration according to the rotation speed of the wheel with built-in suspension, and the orifice 3
a allows the oil to go back and forth.

That is, in a conventional vehicle using a wheel, an elastic body and a damper, which are suspensions, are arranged between the wheel shaft and the vehicle body. Therefore, when a road surface vibration is input to the vehicle, the elastic body is elastic. The body will be deformed and the damper will expand and contract.

On the other hand, when the wheel with a built-in suspension according to the present invention is used, as long as the vehicle is running, that is, the wheel with a built-in suspension rotates, the partition wall is used even if there is no input of road surface vibration. Part 3
Is deformed and the oil chamber R is widened and narrowed in accordance with the deformation of the partition wall 3, and at this time, energy is absorbed by the oil passing through the orifice 3a.

When the road surface vibration is input to the running vehicle, the amount of deformation of the partition wall portion 3 increases, and the amount of the increase in the amount of deformation also reduces the impact and expands and contracts the oil chamber R. As a result, the energy absorption will be realized as the amount of expansion and contraction increases.

From the above, in the case of using the conventional wheel, since the impact relaxation by the elastic body and the energy absorption by the damper are realized only when the road surface vibration is input, the elastic body and the damper are This means that it is impossible to prevent the occurrence of shock when starting operation.

On the other hand, in the case of the wheel with a built-in suspension of the present invention, so to speak, the partition wall 3 is deformed and the amount of oil passing is changed following the normal operation. The occurrence will not be a concern and the riding comfort of the vehicle will be improved.

[0034]

As described above, according to the first aspect of the present invention, the vehicle floor can be set lower because the spring body of the suspension including the partition wall and the damper of the suspension including the orifice are not provided outside. In addition, the vehicle interior space can be set wide.

According to the second aspect of the invention, it is possible to prevent the rolling of the wheel portion while obtaining the predetermined shock absorbing function and energy absorbing function.

As a result, according to the wheel with a built-in suspension of the present invention, when the vehicle is set so as to be able to get on and off, for example, each wheelchair, it is easy to get on and off each wheelchair, and the wheelchair in the vehicle is equipped. Each has the advantage of improving habitability.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a wheel with a suspension according to the present invention, taken along the line YY in FIG.

FIG. 2 is a vertical cross-sectional view showing a wheel with a suspension according to the present invention, taken along line XX in FIG.

[Explanation of symbols]

1 hub 2 rims 3 bulkheads 3a Orifice A wheel axle R oil chamber S gap T tire

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16F 15/023 F16F 15/08 E 15/04 Z 15/08 13/00 620P 9/32 H Z

Claims (2)

[Claims] 1. A wheel having a hub formed into a substantially tubular shape for connecting wheel shafts, and a rim positioned on the outer peripheral side of the hub for interposing a tire, the outer circumference of the hub being A plurality of partition walls made of an elastic material that deforms when an external force is applied to the inner circumference of the rim and that restores when the external force is canceled define a plurality of oil chambers in the circumferential direction, while facing each other with the partition wall sandwiched therebetween. A wheel with a built-in suspension characterized in that the oil chambers are connected to each other through an orifice formed in a partition wall. 2. The wheel with a built-in suspension according to claim 1, wherein the elastic material is a rubber material, and the partition wall has a wall thickness capable of preventing relative lateral displacement between the hub and the rim.