WO2018216626A1

WO2018216626A1 - Wheel and vehicle provided therewith

Info

Publication number: WO2018216626A1
Application number: PCT/JP2018/019353
Authority: WO
Inventors: 将光篠宮
Original assignee: ヤマハ発動機株式会社
Priority date: 2017-05-26
Filing date: 2018-05-18
Publication date: 2018-11-29
Also published as: TW201900443A; JPWO2018216626A1; JP7140758B2; TWI688491B

Abstract

Provided is a wheel that comprises a rim having a fiber-reinforced resin, and has a structure that can be made lighter while ensuring strength. A rear wheel 41 comprises: a fiber-reinforced resin rim 60; a hub 50; a valve 90 that allows a gas to flow into an annular space S formed between the rim 60 and a rear tire 42; a fiber-reinforced resin chamber section 80; and a linking section 70. The chamber section 80 has a fiber-reinforced resin boundary wall section 81 that forms a portion of the rim 60, a wall section 82 that is connected to the rim 60, and a partition space P that is partitioned and formed by the boundary wall section 81 and the wall section 82. In the chamber section 80, a through-hole 81a that connects the partition space P and the annular space S is provided in the boundary wall section 81, and a valve attachment hole 82a to which the valve 90 is attached is provided in the wall section 82.

Description

Wheel and vehicle equipped with the same

The present invention relates to a wheel used in a vehicle.

Wheels with fiber reinforced resin rims that can be used in vehicles are known. For example, Patent Document 1 discloses a wheel in which a rim, a hub, and a flange connecting the rim and the hub are integrally formed of fiber reinforced resin.

The wheel disclosed in Patent Document 1 can be made lighter than a metal wheel by using a fiber reinforced resin. Further, in the vehicle disclosed in Patent Document 1, the rim has a layer shape having a layer in which a resin is reinforced in the circumferential direction by a reinforcing continuous fiber or a reinforcing fabric and a layer using a reinforcing short fiber. It is composed by the body. Thereby, the wheel has high strength and rigidity.

Therefore, the wheel disclosed in Patent Document 1 achieves both weight reduction and strength securing.

JP-A-61-135801

As described above, by configuring the wheel with fiber reinforced resin, the weight of the wheel can be reduced while securing the strength. However, in recent years, it has been desired to further reduce the weight of the wheel while ensuring the strength of the wheel.

An object of the present invention is to provide a wheel having a configuration capable of further reducing weight while securing strength in a wheel including a rim including a fiber reinforced resin.

First, the present inventor examined reducing the thickness of the wheel in order to further reduce the weight of the wheel while ensuring the strength. As a result, the present inventors have found the following points.

A rim containing a fiber reinforced resin (hereinafter referred to as a fiber reinforced resin rim) is a cross section when the wheel is cut in the radial direction (hereinafter referred to as a radial cross section), and the width direction of the wheel (the left-right direction of the vehicle). Each has a protruding support part. Therefore, when a force is applied to the wheel in the radial direction, the fiber reinforced resin rim has both ends in the width direction of the rim (the left-right direction of the vehicle), that is, the front end of the support portion in the radial direction of the wheel. A force that causes displacement is applied.

Therefore, when the present inventors try to secure the strength of the fiber-reinforced resin rim when the above-described force is applied to the wheel, it is difficult to reduce the thickness of the wheel. Noticed.

Specifically, the present inventor has found that the strength of the fiber reinforced resin rim is lower in the vicinity of the valve hole provided in the fiber reinforced resin rim for mounting the valve than in the portion where the valve hole is not provided. I found out that That is, the present inventor is that the fiber in the fiber reinforced resin contained in the fiber reinforced resin rim is cut around the valve hole, so that the strength of the fiber reinforced resin rim is higher than that of the uncut portion. I noticed a drop around the valve hole.

When attaching a valve to a fiber reinforced resin rim, it is necessary to provide a hole having a size (for example, a diameter of 8.5 mm or 11.5 mm) that allows the valve to be attached to the fiber reinforced resin rim. When the valve hole of such a size is provided in the fiber reinforced resin rim, as described above, the strength of the fiber reinforced resin rim is lower than that of the portion having no hole. Further, when the valve is attached to the fiber reinforced resin rim, it is necessary to form a seating surface around the valve hole in order to attach the valve to the fiber reinforced resin rim. If it does so, the thickness of a fiber reinforced resin rim will become small in the part which formed the seat surface in the fiber reinforced resin rim. In this case, the strength of the fiber reinforced resin rim is lower than that of the portion where the seat surface is not formed.

On the other hand, by reducing the size of the valve hole provided in the fiber reinforced resin rim, it is possible to suppress a decrease in strength of the fiber reinforced resin rim as compared with the case where the valve hole size is large. However, since the size of the valve is fixed, if the size of the valve hole is reduced, the valve cannot be attached to the valve hole. Moreover, the strength reduction of the fiber reinforced resin rim can be prevented by increasing the thickness of the seat surface portion around the valve hole provided in the fiber reinforced resin rim. However, since the size of the thickness of the seating surface portion around the valve hole is determined, if the thickness of the seating surface portion around the valve hole is increased, the valve cannot be attached to the valve hole. Therefore, it has been difficult to secure the strength of the fiber reinforced resin rim while providing the valve hole in the fiber reinforced resin rim and reduce the thickness of the fiber reinforced resin rim.

In the wheel equipped with the rim made of fiber reinforced resin, the structure of the valve hole was devised in order to reduce the weight while ensuring the strength. Specifically, the present inventor has conceived the following configuration.

A wheel according to an embodiment of the present invention is a wheel used in a vehicle. An annular fiber reinforced resin rim that includes a fiber reinforced resin that supports the tire and the resin is reinforced by fibers, a hub positioned at the center of rotation, and the fiber reinforced resin rim and the fiber reinforced resin rim are mounted. A valve for allowing gas to flow into an annular space formed in an annular shape with a tire to be formed, a boundary wall made of fiber reinforced resin that constitutes a part of the rim made of fiber reinforced resin, and the fiber reinforced A fiber reinforced resin chamber having a fiber reinforced resin wall portion connected to the resin rim, and a partition space defined by the fiber reinforced resin boundary wall portion and the fiber reinforced resin wall portion. And a connecting portion that connects the hub and the fiber reinforced resin chamber portion in the radial direction. The fiber reinforced resin chamber portion is provided with a vent hole connecting the partition space of the fiber reinforced resin chamber portion and the annular space or the outside in the boundary wall portion made of the fiber reinforced resin, and the fiber reinforced resin A valve mounting hole for mounting the valve is provided in the resin wall.

Thereby, in a wheel having a fiber reinforced resin rim containing a fiber reinforced resin, even if a radial force is applied to the wheel, a vent hole provided in a boundary wall portion of the fiber reinforced resin rim The strength can be secured in the peripheral portion of the.

That is, when a radial force is applied to the wheel, a portion of the rim that supports the tire receives a force that causes the tip portion to be displaced in the radial direction. In the configuration in which the valve hole for attaching the valve to the rim is provided, the strength of the peripheral portion of the valve hole is lowered. Therefore, when the rim receives the force as described above, the peripheral portion of the valve hole may be deformed. In particular, when the rim is a fiber reinforced resin rim including a fiber reinforced resin in which the resin is reinforced with fibers, the fiber is cut at the peripheral portion of the valve hole. The strength of the is further reduced.

On the other hand, in the above-described configuration, a boundary wall made of fiber reinforced resin that constitutes a part of the rim made of fiber reinforced resin and defines an annular space between the rim made of fiber reinforced resin and the tire, and the fiber A fiber reinforced resin chamber portion having a partition space defined by a fiber reinforced resin wall portion extending radially inward from the reinforced resin rim is provided. And the vent hole which connects the said division space and the said annular space is provided in the boundary wall part of the said fiber reinforced resin rim. In addition, a valve mounting hole through which the valve passes is provided in the wall portion made of the fiber reinforced resin to connect the partition space and the outside. Thereby, intensity | strength is securable in the peripheral part of the said vent hole. Therefore, even when the fiber-reinforced resin rim receives the above-described force, it is possible to prevent the structure of the fiber-reinforced resin rim from changing.

Moreover, since the fiber reinforced resin rim includes a fiber reinforced resin in which the resin is reinforced with fibers, the weight can be reduced as compared with a metal rim.

Therefore, with the above-described configuration, it is possible to obtain a configuration capable of reducing the weight of the wheel while ensuring the strength.

According to another aspect, the wheel of the present invention preferably includes the following configuration. The wall portion made of the fiber reinforced resin has an annular shape connected in the circumferential direction along the rim made of the fiber reinforced resin.

Thus, the wall portion that partitions the partition space of the fiber reinforced resin chamber portion together with the fiber reinforced resin boundary wall portion has sufficient strength in the circumferential direction and the radial direction of the fiber reinforced resin rim. Therefore, the fiber reinforced resin chamber portion has sufficient strength in the circumferential direction and the radial direction. Therefore, the strength of the wheel can be ensured.

According to another aspect, the wheel of the present invention preferably includes the following configuration. The fiber reinforced resin wall portion extends inward in the radial direction from the fiber reinforced resin rim. The partition space in the fiber reinforced resin chamber portion is located more inward in the radial direction than the fiber reinforced resin rim.

Thereby, since the section modulus in the radial direction of the wheel can be increased by the fiber reinforced resin chamber portion, the strength of the wheel can be improved.

According to another aspect, the wheel of the present invention preferably includes the following configuration. The fiber reinforced resin chamber portion is formed such that the radial dimension in the partition space is larger than the lateral dimension of the vehicle.

This makes it possible to improve the strength of the fiber reinforced resin chamber in the radial direction of the wheel. Therefore, the radial strength of the wheel can be improved.

According to another aspect, the wheel of the present invention preferably includes the following configuration. The wall portion made of fiber reinforced resin has a vertical wall portion made of fiber reinforced resin extending inward in the radial direction from the rim made of fiber reinforced resin. The valve mounting hole passes through the vertical wall portion made of fiber reinforced resin in the left-right direction of the vehicle and connects the partition space of the fiber reinforced resin chamber portion to the outside. The vent hole penetrates the boundary wall portion made of the fiber reinforced resin in the radial direction and connects the annular space and the partition space.

Thus, even when a radial force is applied to the fiber reinforced resin rim, it is possible to prevent a large force from being applied to the peripheral portion of the valve mounting hole. Therefore, the strength of the wheel can be improved.

According to another aspect, the wheel of the present invention preferably includes the following configuration. The wall portion made of fiber reinforced resin has a vertical wall portion made of fiber reinforced resin extending inward in the radial direction from the rim made of fiber reinforced resin. The valve mounting hole is configured by a space surrounded by the vertical wall portion made of the fiber reinforced resin. The vent hole penetrates the boundary wall portion made of the fiber reinforced resin in the radial direction and connects the annular space and the partition space.

Even with such a configuration, a configuration capable of reducing the weight of the wheel while ensuring strength can be obtained.

According to another aspect, the wheel of the present invention preferably includes the following configuration. The fiber reinforced resin wall extends in the left-right direction of the vehicle outward in the radial direction from the fiber reinforced resin boundary wall, and is between the fiber reinforced resin boundary wall. It has a lateral wall portion made of fiber reinforced resin that partitions the partition space. The valve mounting hole penetrates the lateral wall portion made of fiber reinforced resin in the radial direction and connects the partition space of the chamber portion made of fiber reinforced resin and the annular space. The vent hole penetrates the boundary wall portion made of the fiber reinforced resin in the radial direction and connects the partition space to the outside.

According to another aspect, the wheel of the present invention preferably includes the following configuration. The fiber reinforced resin chamber portion is integrally formed with the fiber reinforced resin rim by a fiber reinforced resin in which the resin is reinforced by fibers.

By integrally configuring the fiber reinforced resin chamber portion and the fiber reinforced resin rim with the fiber reinforced resin, the strength of the wheel can be further improved and the wheel can be further reduced in weight.

According to another aspect, the wheel of the present invention preferably includes the following configuration. The connecting portion has a disk shape. Thereby, the intensity | strength of a connection part can be improved in the perimeter of a wheel. Therefore, the strength of the wheel can be improved more reliably.

According to another aspect, the wheel of the present invention preferably includes the following configuration. The fiber reinforced resin rim, the fiber reinforced resin chamber portion, the hub, and the connecting portion are integrally formed of a fiber reinforced resin in which a resin is reinforced by fibers.

This makes it possible to improve the strength of the wheel and reduce the weight of the wheel.

The technical terms used in this specification are used only for the purpose of defining specific embodiments, and are not intended to limit the invention by the technical terms.

As used herein, “and / or” includes all combinations of one or more of the associated listed components.

As used herein, the use of “including,” “including,” “comprising” or “having” and variations thereof includes the described features, steps, elements, components, and / or Identify the presence of their equivalents, but may include one or more of steps, actions, elements, components, and / or groups thereof.

In this specification, “attached”, “connected”, “coupled” and / or their equivalents are used in a broad sense, and are “direct and indirect” attachments, Includes both connections and couplings. Further, “connected” and “coupled” are not limited to physical or mechanical connections or couplings, and can include direct or indirect connections or couplings.

Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms defined in commonly used dictionaries should be construed to have a meaning consistent with the meaning in the context of the related art and this disclosure, unless explicitly defined herein. Should not be interpreted in an ideal or overly formal sense.

It will be understood that a number of techniques and processes are disclosed in the description of the invention. Each of these has individual benefits and can also be used with one or more or possibly all of the other disclosed techniques.

Therefore, for clarity, the description of the invention refrains from repeating all possible combinations of individual steps unnecessarily. However, the specification and claims should be read with the understanding that all such combinations are within the scope of this invention.

In this specification, an embodiment of a wheel according to the present invention will be described.

In the following description, numerous specific examples are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without these specific examples.

Accordingly, the following disclosure is to be considered as illustrative of the invention and is not intended to limit the invention to the specific embodiments illustrated by the following drawings or description.

<Definition made of fiber reinforced resin>
In the present specification, the term “made of fiber reinforced resin” means not only the case where a component is composed only of fiber reinforced resin reinforced with fibers, but also materials other than fiber reinforced resin in addition to fiber reinforced resin. This includes cases where parts are configured.

<Definition of division>
In this specification, a partition means that a space is partitioned into a plurality of spaces by walls or the like. The section includes not only a case where a sealed space is formed by a wall or the like, but also a case where a part of the space is connected to another space if separated as a space.

The application target of the present invention is not limited to motorcycles. The present invention may be applied to vehicles other than motorcycles such as tricycles and four-wheel vehicles.

According to an embodiment of the present invention, it is possible to provide a wheel having a configuration that can reduce the weight while securing strength in a wheel including a fiber reinforced resin rim.

FIG. 1 is a left side view showing an outline of the overall configuration of a vehicle according to Embodiment 1 of the present invention. FIG. 2 is a left side view of the vehicle and a cross-sectional view taken along line AA in the left side view. FIG. 3 is a perspective view showing a schematic configuration of the rear wheel. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a diagram schematically illustrating the force received by the rim of the rear wheel when a force is input to the rear wheel tire. FIG. 6 is a cross-sectional view illustrating a schematic configuration of a rear wheel of a vehicle according to the second embodiment. FIG. 7 is a cross-sectional view illustrating a schematic configuration of a vehicle rear wheel according to the third embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In each figure, the same parts are denoted by the same reference numerals, and the description of the same parts will not be repeated. In addition, the dimension of the structural member in each figure does not represent the dimension of an actual structural member, the dimension ratio of each structural member, etc. faithfully.

Hereinafter, the arrow F in the figure indicates the forward direction of the vehicle. An arrow RR in the figure indicates the backward direction of the vehicle. An arrow U in the figure indicates the upward direction of the vehicle. An arrow L in the figure indicates the left direction of the vehicle. An arrow R in the figure indicates the right direction of the vehicle. In the following description, the front, rear, left, and right directions mean front, rear, left, and right directions, respectively, as viewed from the occupant driving the vehicle.

[Embodiment 1]
<Overall configuration>
FIG. 1 is a left side view illustrating the outline of the overall configuration of the vehicle 1 according to the first embodiment. FIG. 2 is a left side view of the vehicle 1 and a sectional view of the rear wheel 41. Since the left side view of the vehicle 1 in FIG. 2 is the same as that in FIG. 1, the configuration of the vehicle 1 will be described below with reference to FIG. 2 is the same as FIG. 4 in cross section. The configuration of the rear wheel 41 will be described later.

The vehicle 1 is, for example, a motorcycle and includes a vehicle body 2, a front wheel 3, and a rear wheel 4. The vehicle body 2 supports components such as the front wheel 3, the rear wheel 4, the handle 6, the seat 7, and the power unit 8. In the present embodiment, the vehicle body 2 includes a frame 10, a pair of front forks 15, and a rear arm 16.

The frame 10 has a head pipe 11 and a main frame 12. The head pipe 11 is located at the front portion of the vehicle 1 and rotatably supports a steering shaft (not shown) connected to the handle 6. The main frame 12 is connected to the head pipe 11 so as to extend from the head pipe 11 toward the rear of the vehicle. A power unit 8 and the like are supported on the main frame 12.

The frame 10 may be made of a metal material, or may be made of a fiber reinforced resin in which a resin is reinforced by fibers such as carbon fibers.

The pair of front forks 15 are disposed on the left and right sides of the front wheel 3 and extend upward and rearward from the front wheel 3. The upper end of each front fork 15 is connected to the handle 6. The lower end portion of each front fork 15 supports the front wheel 3 in a rotatable manner.

The rear arm 16 extends rearward from the rear part of the main frame 12. The front end portion of the rear arm 16 is connected to the rear portion of the main frame 12 so as to be rotatable in the vertical direction. The rear end portion of the rear arm 16 supports the rear wheel 4 in a rotatable manner. The rear arm 16 and the main frame 12 are connected by a rear suspension 17.

The front wheel 3 has a front wheel 31 and a front wheel tire 32. The front wheel 31 is rotatably supported by the lower ends of the pair of front forks 15. In the present embodiment, the front wheel 31 is, for example, a metal wheel as in the conventional case. The front wheel tire 32 is disposed on the outer peripheral surface of the front wheel 31.

A front wheel brake disc 33 constituting a part of the front wheel brake is attached to the front wheel 31 at the center of rotation. The front wheel brake disc 33 has a disk shape and rotates together with the front wheel 31. A front wheel caliper 34 that holds the front wheel brake disc 33 during operation of the front wheel brake is disposed on the outer periphery of the front wheel brake disc 33.

The rear wheel 4 has a rear wheel 41 (wheel) and a rear wheel tire 42 (tire). The rear wheel 41 is rotatably supported at the rear end portion of the rear arm 16. In the present embodiment, the rear wheel 41 is made of a carbon fiber reinforced resin in which the resin is reinforced with carbon fibers. The rear wheel tire 42 is disposed on the outer peripheral surface of the rear wheel wheel 41.

The rear wheel brake disc 43 constituting a part of the rear wheel brake is also attached to the rear wheel wheel 41 at the center of rotation. The rear wheel brake disc 43 has a disk shape and rotates together with the rear wheel wheel 41. Similar to the front wheel 3, a rear wheel caliper 44 that holds the rear wheel brake disc 43 when the rear wheel brake is operated is disposed on the outer periphery of the rear wheel brake disc 43.

<Rear wheel>
Next, a specific configuration of the rear wheel 41 will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view showing a schematic configuration of the rear wheel 41. 4 is a cross-sectional view taken along line IV-IV in FIG.

3 and 4, the rear wheel 41 has a circular shape when viewed from the axial direction of the rotation axis R located at the rotation center of the rear wheel 4. The rear wheel 41 is disposed so that the center thereof coincides with the rotation axis R when viewed from the axial direction. The axial direction of the rotation axis R of the rear wheel 4 coincides with the left-right direction of the vehicle 1.

The rear wheel 41 includes a hub 50 positioned at the center of rotation of the rear wheel 4, an annular rim 60 (fiber reinforced resin rim) positioned at a radially outer periphery of the rear wheel 41, and a radial direction of the rim 60. It has the chamber part 80 (fiber reinforced resin chamber part) located inside, and the connection part 70 which connects the hub 50 and the chamber part 80. The rear wheel 41 of this embodiment is a so-called dish wheel in which the connecting portion 70 has a disk shape.

The hub 50 is located at the center of rotation of the rear wheel 41. As shown in FIG. 4, the hub 50 includes a left hub portion 51 and a right hub portion 52. The left hub portion 51 is located to the left of the center of the rear wheel 41 in the left-right direction. The right hub portion 52 is located to the right of the center in the left-right direction. Each of the left hub portion 51 and the right hub portion 52 has an annular shape and a plate shape, and is disposed so that the thickness direction coincides with the left-right direction.

The left hub connecting member 53 is connected to the left hub 51 on the left side. The right hub connecting member 54 is connected to the right hub portion 52 on the right side. The left hub connecting member 53 and the right hub connecting member 54 each have a disk shape, and are attached to the hub 50 so that the thickness direction coincides with the left-right direction. The left hub connecting member 53 and the right hub connecting member 54 are connected in the left-right direction by a connecting pipe 55 that passes through the hub 50. An axle shaft (not shown) is inserted through the connection pipe 55. Thus, the hub 50 is rotatably supported on an axle (not shown) via the left hub connecting member 53, the right hub connecting member 54, and the connecting pipe 55.

Although not particularly shown, the right hub connection member 54 is provided with a sprocket that meshes with a chain that transmits power of the power unit. Thereby, the power of the power unit is transmitted to the rear wheel 41 via the chain.

In this embodiment, the left hub connecting member 53, the right hub connecting member 54, and the connecting pipe 55 are each a metal member.

The connecting portion 70 is formed so that the width gradually decreases from the hub 50 toward the chamber portion 80 as seen in the radial cross section of the rear wheel 41. That is, the connecting portion 70 has a width at the connecting portion with the chamber portion 80 smaller than a width at the connecting portion with the hub 50 when viewed in the radial cross section. Thereby, the rear-wheel caliper 44 can be arrange | positioned to the right of the connection part with the chamber part 80 in the connection part 70. FIG. Therefore, the rear wheel caliper 44 can be compactly arranged in the left-right direction with respect to the rear wheel 4.

Specifically, the connecting portion 70 has a left connecting portion 71 and a right connecting portion 72. The left connecting portion 71 connects the left hub portion 51 and the chamber portion 80. The right connecting portion 72 connects the right hub portion 52 and the chamber portion 80. The left connecting portion 71 and the right connecting portion 72 are each plate-shaped, and are provided such that the interval decreases from the hub 50 toward the chamber portion 80 when viewed in the radial cross section of the rear wheel 41. A space is formed between the left connecting portion 71 and the right connecting portion 72.

The rim 60 extends in the left-right direction from the center in the left-right direction of the rear wheel 41 when the rear wheel 41 is viewed in a radial cross section. That is, the rim 60 includes a left rim portion 61 that extends leftward from the center in the left-right direction and outward in the radial direction, and a right rim portion 62 that extends rightward from the center in the left-right direction and outward in the radial direction. And have. In the rim 60, the left rim portion 61 and the right rim portion 62 are integrally formed. In the rim 60, the connecting portion between the left rim portion 61 and the right rim portion 62 is recessed inward in the radial direction.

The left rim portion 61 protrudes leftward from the connecting portion 70 when viewed in the radial cross section. The right rim portion 62 protrudes to the right from the connecting portion 70 when viewed in the radial cross section. The left rim portion 61 and the right rim portion 62 are symmetric when viewed in the radial cross section.

The rear wheel tire 42 is disposed radially outward of the left rim portion 61 and the right rim portion 62. Specifically, the inner peripheral portion of the rear tire 42 is in contact with the radially outer peripheral portions of the left rim portion 61 and the right rim portion 62. Thereby, an annular space S extending annularly along the rim 60 is formed between the rim 60 and the rear wheel tire 42.

The left rim portion 61 has a protruding portion 61a protruding outward in the radial direction at the left end portion. The right rim portion 62 has a protruding portion 62a that protrudes radially outward at the right end portion. That is, the

protrusions

61a and 62a are located at both ends of the rim 60 in the left-right direction. The inner peripheral portion of the rear tire 42 is disposed between the protruding portion 61a and the protruding portion 62a of the rim 60 in the left-right direction.

The rear wheel 41 is made of carbon fiber reinforced resin in which a resin (for example, epoxy resin, vinyl ester, phenol resin, polyamide, polypropylene, polyphenylene sulfide, etc.) is reinforced with carbon fiber. In the present embodiment, the carbon fiber includes a fiber sheet that is laminated in the thickness direction. The direction in which the fiber sheets (fibers) are laminated is the thickness direction of the walls constituting the rear wheel 41. The fiber sheet means a member formed into a sheet shape (planar shape) by, for example, knitting or hardening fibers.

In the present embodiment, the hub 50, the rim 60, the connecting portion 70, and the chamber portion 80 are made of carbon fiber resin. The hub 50, the rim 60, the connecting portion 70, and the chamber portion 80 are integrally formed.

In the above-described configuration, as shown in FIG. 5, when an upward force is input to the rear wheel tire 42 (white arrow in FIG. 5), the force is applied from the rear wheel tire 42 to both left and right ends of the rim 60. Is input (solid arrow in FIG. 5). That is, an upward force is input to the left end portion of the left rim portion 61 and the right end portion of the right rim portion 62. As a result, a tensile stress is generated at the central portion of the rim 60 in the left-right direction.

Generally, a valve for supplying air into an annular space between the rim and the rear wheel tire is attached to the rim. Therefore, a through hole for attaching the valve is formed in the rim. As described above, in the case of the rear wheel wheel 41 made of carbon fiber reinforced resin in which the resin is reinforced with carbon fiber, the carbon fiber is divided at a portion where a through hole for attaching a valve is provided in the rim. . Therefore, the strength of the peripheral portion of the rim around the through hole is lower than that of a portion where no through hole is provided. In such a configuration, as described above, when force is input from the rear wheel tire to both ends in the left-right direction of the rim, there is a possibility that sufficient strength cannot be obtained in the rim.

On the other hand, in this embodiment, the valve is not directly attached to the rim 60, but only the vent hole 81a is provided in the rim 60, and the valve 90 is attached to the chamber portion 80 located radially inward of the rim 60. It has been.

Specifically, the rear wheel 41 has a chamber portion 80 that is radially inward of the rim 60 and between the central portion of the rim 60 in the left-right direction and the connecting portion 70. As shown in FIG. 4, the chamber portion 80 forms a central portion in the left-right direction of the rim 60, and a pair of boundary walls 81 that define a part of the annular space S and a pair of rims 60 that extend radially inward. It has the wall parts 82 and 83 (vertical wall part), and the connection wall part 84 which connects

wall parts

82 and 83 mutually. The chamber portion 80 has a partitioned space P that is partitioned by a boundary wall portion 81,

wall portions

82 and 83, and a connecting wall portion 84. That is, the rear wheel 41 has a partition space P between the rim 60 and the connecting portion 70. The partition space P may be formed in an annular shape around the entire circumference in the radial direction of the rim 60 of the rear wheel 41, or may be formed only in a part in the circumferential direction. .

By providing the chamber portion 80 as described above inward of the rim 60 in the radial direction, the section modulus can be increased in the radial cross section of the rear wheel 41. Therefore, the strength of the rear wheel 41 can be improved.

The boundary wall portion 81 is configured by a right end portion of the left rim portion 61 and a left end portion of the right rim portion 62 in the rim 60. The boundary wall portion 81 is located at a portion of the rim 60 that is recessed inward in the radial direction.

The pair of

wall portions

82 and 83 are arranged in parallel in the left-right direction. The pair of

wall portions

82 and 83 have the same radial dimension. Further, the radial dimension of the pair of

wall portions

82 and 83 is larger than the distance between the pair of

wall portions

82 and 83. Therefore, the partition space P of the chamber portion 80 has a larger dimension in the radial direction than that in the left-right direction. Thereby, the strength of the chamber portion 80 can be improved in the radial direction of the rear wheel 41. Therefore, the radial strength of the rear wheel 41 can be improved.

The pair of

wall portions

82 and 83 have an annular shape connected in the circumferential direction along the rim 60. Accordingly, the

wall portions

82 and 83 that define the partition space P together with the boundary wall portion 81 and the connecting wall portion 84 have sufficient strength in the circumferential direction and the radial direction of the rim 60. Therefore, the strength of the chamber portion 80 can be ensured.

The boundary wall portion 81 is provided with a vent hole 81a penetrating the boundary wall portion 81 in the radial direction. The vent hole 81a connects the annular space S and the partition space P. The vent hole 81a is smaller than a later-described valve mounting hole 82a to which the valve 90 is mounted. The vent hole 81a is provided in a central portion in the left-right direction of the rim 60 when the rim 60 is viewed in a cross section in the radial direction.

One of the pair of

wall portions

82, 83 is provided with a valve mounting hole 82a that penetrates the wall portion 82 in the left-right direction. The valve mounting hole 82a connects the partition space P and the outside. A valve 90 is attached to the valve attachment hole 82a.

Specifically, the valve 90 has a valve main body 91 and a collar 92. The valve main body 91 is attached to the peripheral edge portion of the valve attachment hole 82a through a collar 92. The collar 92 is made of, for example, a metal material such as an aluminum alloy, and is fixed to the peripheral edge portion of the valve mounting hole 82a with an adhesive or the like. A valve body 91 is attached to the collar 92. That is, the collar 92 functions as an attachment member for attaching the valve body 91 to the peripheral edge portion of the valve attachment hole 82 a in the wall portion 82.

As described above, in the chamber portion 80, the valve mounting hole 82 a for mounting the valve 90 is separated from the vent hole 81 a that connects the annular space S and the partition space P between the rear wheel tire 42 and the rim 60. By providing, the strength reduction of the rear wheel 41 can be prevented. That is, with the above-described configuration, the vent hole 81a provided in the boundary wall portion 81 that constitutes a part of the rim 60 does not need to be sized so that the valve 90 can be attached. Therefore, the degree of freedom in designing the shape, size, position and number of the vent holes and the valve mounting holes can be improved, and the strength of the rim 60 can be prevented from being lowered. Therefore, the strength reduction of the rear wheel 41 can be prevented.

Moreover, the rear wheel 41 is made of a carbon fiber reinforced resin in which the resin is reinforced with carbon fibers. That is, the hub 50, the rim 60, and the connecting portion 70 are integrally formed of a carbon fiber reinforced resin in which a resin is reinforced with carbon fibers. The chamber portion 80 is formed integrally with the rim 60 by a carbon fiber reinforced resin in which the resin is reinforced by carbon fibers. Thereby, the weight reduction of the rear-wheel wheel 41 can be achieved compared with a metal wheel.

Therefore, with the above-described configuration, a wheel that can reduce the weight while securing the strength can be obtained.

[Embodiment 2]
FIG. 6 shows a cross-sectional view of the rear wheel 141 according to the second embodiment. The rear wheel 141 according to the second embodiment is different from the configuration according to the first embodiment in the configuration of the chamber portion 180 and the mounting structure of the valve 90. Therefore, below, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, description is abbreviate | omitted, and only a different part is demonstrated.

As shown in FIG. 6, the chamber portion 180 includes a boundary wall portion 81 that constitutes a part of the rim 60 and a pair of wall portions 182 and 183 (vertical wall portions) that extend radially inward from the rim 60. . The

walls

182 and 183 are not connected at the radially inner ends. Therefore, the chamber part 180 has an opening in the radially inner peripheral part. A valve 90 is attached to this opening. That is, the opening is the valve mounting hole 180a of the valve 90. The valve mounting hole 180a opens in the chamber portion 180 inward in the radial direction. That is, the valve mounting hole 180a connects the partition space P and the outside. Similar to the valve 90 of the first embodiment, the collar 92 of the valve 90 is mounted in the valve mounting hole 180a.

As in the first embodiment, the boundary wall portion 81 and the

wall portions

182 and 183 of the chamber portion 180 are reinforced with a resin (for example, epoxy resin, vinyl ester, phenol resin, polyamide, polypropylene, polyphenylene sulfide, etc.) by carbon fiber. It is made of carbon fiber reinforced resin. Also in this embodiment, the carbon fiber includes a fiber sheet that is laminated in the thickness direction. The lamination direction of the fiber sheets (fibers) is the thickness direction of the walls constituting the rear wheel 141. The fiber sheet means a member formed into a sheet shape (planar shape) by, for example, knitting or hardening fibers.

In the present embodiment, the rear wheel 141 has an accommodating space Q for arranging the valve 90 between the chamber portion 180 and the connecting portion 70. The accommodation space Q is formed between an end portion located radially inward of the

wall portions

182 and 183 of the chamber portion 180 and an end portion located radially outward of the connecting portion 70. The accommodation space Q is a space that can accommodate the valve 90 and has a size that allows the valve 90 to be fitted with an air injection portion of an air pump (not shown). Further, the accommodation space Q is provided only in a part in the circumferential direction of the rear wheel 141.

In addition, by attaching the valve 90 to the valve mounting hole 180 a of the chamber portion 180, the partition space P is partitioned and formed in the chamber portion 180 by the boundary wall portion 81 and the

wall portions

182 and 183.

Also with the above-described configuration, the valve mounting hole 180a for mounting the valve 90 to the rear wheel 141 can be provided separately from the vent hole 81a provided in the boundary wall portion 81. Thereby, the strength reduction of the rear wheel 141 can be prevented.

Therefore, even with the above-described configuration, it is possible to obtain a wheel that can be reduced in weight while ensuring strength.

[Embodiment 3]
In FIG. 7, sectional drawing of the rear-wheel wheel 241 which concerns on Embodiment 3 is shown. The rear wheel 241 in the third embodiment is different from the first embodiment in the configuration of the chamber portion 280 and the mounting structure of the valve 190. Therefore, below, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, description is abbreviate | omitted, and only a different part is demonstrated.

As shown in FIG. 7, the chamber part 280 has a lateral wall part 263 and a boundary wall part 281. The lateral wall portion 263 is provided outward in the radial direction of the rim 260 of the rear wheel 241. Specifically, the lateral wall portion 263 is radially outward with respect to the rim 260 so as to form a partition space P between a central portion in the left-right direction and a portion recessed radially inward in the rim 260. Located in. In the rim 260, the central portion and the recessed portion constitute a boundary wall portion 281 of the chamber portion 280. Therefore, the chamber portion 280 of the present embodiment is formed radially outward from the central portion of the rim 260.

The lateral wall portion 263 is provided with a valve mounting hole 263a for mounting the valve 190. The valve mounting hole 263a connects the partition space P and the annular space S. A ventilation hole 281 a is formed in the boundary wall portion 281. The vent hole 281a connects the partition space P and the outside. In the present embodiment, a part of the valve 190 is inserted into the vent hole 281a.

The valve 190 of the present embodiment is a valve in which a rubber part 192 is integrally formed with the valve main body 191. The rubber part 192 is attached to the peripheral part of the valve attachment hole 263a.

A space between the boundary wall portion 281 of the rim 260 and the connecting portion 270 that can accommodate a part of the valve 190 and has a size capable of mounting an air injection portion of an air pump (not shown) on the valve 190. Q is provided.

Even with the above-described configuration, the valve mounting hole 263a for mounting the valve 190 to the rear wheel 241 can be provided separately from the vent hole 281a provided in the boundary wall 281. Thereby, the strength reduction of the rear wheel 241 can be prevented.

(Other embodiments)
While the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and the above-described embodiment can be appropriately modified and implemented without departing from the spirit of the invention.

In each of the above-described embodiments, the case where the present invention is applied to the

rear wheel wheels

41, 141, and 241 has been described. .

In each of the embodiments described above, the

rear wheel wheels

41, 141, 241 are so-called dish wheels in which the connecting

portions

70, 270 have a disk shape. However, the rear wheel may be a spoke-type wheel in which the connecting portion is a plurality of columnar members. The connecting portion of the rear wheel may have any configuration as long as the hub and the chamber portion can be connected.

In each of the above embodiments, in the

rear wheel

41, 141, 241 the left rim portion 61 and the right rim portion 62 have a symmetrical shape. However, the left rim portion and the right rim portion may be left-right asymmetric. For example, the rear wheel may have a configuration in which the connecting portion is connected to a portion located on the right side or the left side of the center of the rim in the left-right direction as viewed in the radial cross section.

In each of the embodiments described above, one

vent hole

81a, 281a is provided in the

rear wheel

41, 141, 241. However, a plurality of vent holes may be provided in the rear wheel. Further, the size and shape of the air holes may be any size and shape. A plurality of valves may be attached to the rear wheel.

In each of the above embodiments, the

rear wheel

41, 141, 241 is made of carbon fiber reinforced resin in which the resin is reinforced with carbon fiber. However, the rear wheel may be made of a fiber reinforced resin in which the resin is reinforced with fibers other than carbon fibers (for example, aramid fibers, polyethylene fibers, glass fibers, etc.). In each of the above embodiments, the

rear wheel

41, 141, 241 is made of a resin such as epoxy resin, vinyl ester, phenol resin, polyamide, polypropylene, polyphenylene sulfide. The resin may be other types of resins as long as the resin can be reinforced with fibers.

In the rear wheel, if the rim and the chamber portion are made of fiber reinforced resin, the other portions, that is, the hub and the connecting portion may be made of, for example, a metal material or resin. Note that a part of the rim and the chamber portion may be made of metal or resin.

In each of the above embodiments, the carbon fibers used in the carbon fiber reinforced resin may be knitted or unknitted. That is, the carbon fiber may not be a fiber sheet. Moreover, in each said embodiment, although the fiber sheet of carbon fiber is laminated | stacked by two or more, it is not restricted to this, A fiber sheet may be only one sheet. In this case, the laminating direction in each of the embodiments corresponds to the thickness direction of the member made of the carbon fiber reinforced resin. Further, the carbon fiber may be a continuous fiber or a discontinuous fiber having a predetermined length (for example, 1 mm) or more.

In each of the above embodiments, a plurality of fiber sheets used for the carbon fiber reinforced resin are bonded together by a resin in a state where a plurality of fiber sheets are laminated in the thickness direction. However, the carbon fiber reinforced resin may be formed of a composite material in which a carbon fiber reinforced resin layer reinforced with a fiber sheet and a foamed resin layer containing a foamed synthetic resin are laminated in the thickness direction. This composite material has a pair of carbon fiber reinforced resin layers, and the foamed resin layer is disposed between the carbon fiber reinforced resin layers. By using the composite material, the weight of each member including the carbon fiber reinforced resin can be reduced and the thickness of each member can be easily changed as compared with the case where only the carbon fiber reinforced resin layer is used. In addition, you may use resin which can absorb a vibration as the said foaming synthetic resin of the said foaming resin layer.

In each of the embodiments described above, the

rear wheel wheels

41, 141, 241 are integrally formed. However, the rear wheel may be configured by connecting a plurality of members with an adhesive or bolts.

In the first embodiment, the partition space P of the chamber 80 is a cavity. However, the partition space P may be filled with a foam material or a resin material.

In the first embodiment, the chamber portion 80 has a larger dimension in the radial direction in the partition space P than a dimension in the left-right direction. However, the chamber portion may have the same radial dimension in the partition space as the lateral dimension, or the lateral dimension may be larger than the radial dimension.

In the first and second embodiments, the valve 90 includes the valve main body 91 and the collar 92. However, the valve may have a rubber part that can be attached to the valve attachment hole. In this case, the bulb may not have a collar. In the third embodiment, the valve 190 includes the valve body 191 and the rubber part 192. However, the valve may be fixed to the lateral wall portion 263 by a screw instead of the rubber portion. In each of the above embodiments, the valve may have any configuration as long as air can be supplied to the annular space between the rear tire and the rim.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Front wheel 4

Rear wheel

41, 141, 241 Rear wheel (wheel)
42 Rear wheel tire
43 Rear wheel brake disc 44 Rear wheel caliper 50 Hub 51 Left hub portion 52

Right hub portion

60, 260 Rim (fiber reinforced resin rim)
61, 261 Left rim portion 61a Protruding portion 62, 262 Right rim portion

62a Protruding portion

70, 270 Connecting

portion

80, 180, 280 Chamber portion (fiber reinforced resin chamber portion)
81, 281

Boundary wall portion

81a, 281a

Vent hole

82, 83, 182, 183 Wall portion (vertical wall portion)
82a, 180a, 263a Valve mounting hole 84

Connecting wall portion

90, 190

Valve

91, 191 Valve body 92 Collar 192 Rubber portion 263 Horizontal wall portion S Annular space P Partition space

Claims

A wheel used in a vehicle,
An annular fiber reinforced resin rim that includes a fiber reinforced resin that supports the tire and the resin is reinforced with fibers;
A hub located at the center of rotation;
A valve for allowing gas to flow into an annular space formed in an annular shape between the fiber reinforced resin rim and a tire mounted on the fiber reinforced resin rim;
A boundary wall made of fiber reinforced resin that constitutes a part of the rim made of fiber reinforced resin;
A wall portion made of fiber reinforced resin connected to the fiber reinforced resin rim;
A fiber reinforced resin chamber having a boundary wall section formed by the fiber reinforced resin boundary wall section and the fiber reinforced resin wall section; and
A connecting portion for connecting the hub and the fiber reinforced resin chamber portion in a radial direction;
With
The fiber reinforced resin chamber part is:
A vent hole that connects the partition space of the fiber reinforced resin chamber portion and the annular space or the outside is provided in the boundary wall portion made of the fiber reinforced resin,
A wheel in which a valve mounting hole for mounting the valve is provided in a wall portion made of the fiber reinforced resin.
The wheel according to claim 1,
The fiber-reinforced resin wall portion is a wheel having an annular shape connected in the circumferential direction along the fiber-reinforced resin rim.
The wheel according to claim 1 or 2,
The fiber reinforced resin wall portion extends inward in the radial direction from the fiber reinforced resin rim,
The said space in the said fiber reinforced resin chamber part is a wheel located inside the said radial direction rather than the said fiber reinforced resin rim.
The wheel according to any one of claims 1 to 3,
The fiber reinforced resin chamber portion is a wheel formed such that the radial dimension in the partition space is larger than the lateral dimension of the vehicle.
The wheel according to any one of claims 1 to 4,
The wall part made of fiber reinforced resin has a vertical wall part made of fiber reinforced resin extending inward in the radial direction from the rim made of fiber reinforced resin,
The valve mounting hole penetrates the vertical wall portion made of fiber reinforced resin in the left-right direction of the vehicle, and connects the partition space of the fiber reinforced resin chamber portion and the outside,
The air hole penetrates the boundary wall portion made of the fiber reinforced resin in the radial direction and connects the annular space and the partition space.
The wheel according to any one of claims 1 to 4,
The wall part made of fiber reinforced resin has a vertical wall part made of fiber reinforced resin extending inward in the radial direction from the rim made of fiber reinforced resin,
The valve mounting hole is configured by a space surrounded by the vertical wall portion made of the fiber reinforced resin,
The air hole penetrates the boundary wall portion made of the fiber reinforced resin in the radial direction and connects the annular space and the partition space.
The wheel according to any one of claims 1 to 4,
The fiber reinforced resin wall extends in the left-right direction of the vehicle outward in the radial direction from the fiber reinforced resin boundary wall, and is between the fiber reinforced resin boundary wall. It has a lateral wall portion made of fiber reinforced resin that partitions the partition space,
The valve mounting hole penetrates the fiber-reinforced resin lateral wall portion in the radial direction, and connects the partition space and the annular space of the fiber-reinforced resin chamber portion,
The ventilation hole is a wheel that penetrates the boundary wall portion made of the fiber reinforced resin in the radial direction and connects the partition space to the outside.
The wheel according to any one of claims 1 to 7,
The fiber reinforced resin chamber portion is a wheel configured integrally with the fiber reinforced resin rim by a fiber reinforced resin in which the resin is reinforced by fibers.
The wheel according to any one of claims 1 to 8,
The connecting portion is a wheel having a disk shape.
The wheel according to any one of claims 1 to 9,
The fiber reinforced resin rim, the fiber reinforced resin chamber portion, the hub, and the connecting portion are integrally formed of a fiber reinforced resin in which a resin is reinforced by a fiber.
A vehicle comprising the wheel according to any one of claims 1 to 10.