JPH0810002Y2 - wheel - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention relates to a wheel of a vehicle such as a motorcycle,
In particular, it relates to its spokes and hubs.

[Conventional technology]

Conventionally, in a wheel integrally cast from an aluminum casting or the like, three or five spokes extend from a hub mounted on a vehicle toward a rim to support the rim (for example, Design Registration No. 677794). See the bulletin).

[Problems to be solved by the device]

As shown in FIG. 5, the 5-spoke wheel has a relatively short span S of the rim 51 supported by the spoke 50, so that the rim 51 can be made thin and the rigidity of the wheel can be balanced against the axial load. Has the advantage. However, due to the large number of spokes 50, it is inevitable that the total weight of the spokes 50 increases and the wheel becomes relatively heavy.

On the other hand, in the three-spoke wheel shown in FIG. 6, since the number of hollow spokes 52 is small, the weight of the entire wheel is reduced. However, since the span S of the rim 51 supported by the spokes 52 is longer than that of the five-spoke wheel, it is necessary to increase the wall thickness of the rim 51 and the rigidity against load in the axle direction varies. There is.

This invention was made in view of the above-mentioned conventional problems,
Good balance of rigidity against axle load, and
It is an object of the present invention to provide a wheel that can be reduced in weight.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention firstly sets a hub mounted on an axle integrally with the spoke and the rim, and sets it as a single triangular box shape when viewed from the direction of the axle. Further, it has an outer side wall that is separated in the axle direction, and a hollow portion is formed inside the peripheral wall of the hub and the outer side wall. Spokes extend from the apex of the triangular hub to the rim on the extension line of the triangular side.

[Action]

According to this invention, since the spokes extend toward the rim from the apex of the hub, which is integrally formed and is formed in a single triangular hollow box shape when viewed from the direction of the axle, the hub is improved in bending rigidity. However, the weight is lighter and the distance between the hub and the rim is shorter, so the spokes are shorter and the spokes can be made thinner while maintaining rigidity. Further, since the rim extends from the apex of the triangular hub on the extension line of the side of the triangle, the rim is supported by the six spokes. Therefore, the entire spoke is lightweight while maintaining rigidity, and the entire wheel is lightweight while maintaining rigidity together with the hub. In addition, the hollow box-shaped hub, spokes, and rim are integrated, resulting in excellent productivity.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the wheel is an axle (not shown).
The hub 10 mounted on the vehicle, the rim 20 on which a tire (not shown) is mounted, and the spokes 30 extending from the hub 10 toward the rim 20 are integrally cast from an aluminum casting.

The hub 10 has a single triangular shape as a whole when viewed from the axle direction A (FIG. 2), and a seat 11 at the center thereof is provided with a female screw 12 for attaching a brake disc (not shown). . A core support hole 14 for supporting the core during casting is provided inside the apex 12 of the triangle so as to penetrate in the axle direction A (FIG. 2). An axle mounting hole 15 is provided in the center of the hub 10. That is, as shown in FIG. 2, the hub 10 is formed in a hollow box shape in which the female screw 12, the core support hole 14, and the axle mounting hole 15 are opened. In other words, the hub 10 has an outer wall 40 that is spaced apart in the axial direction A (FIG. 2), and has an inner hollow portion surrounded by the peripheral wall 41 and the outer wall 40 of the hub 10 (shown by a broken line in FIG. 1). Are formed.
Also, a pair of bosses that support the axle are integrally formed with the outer wall 40 around the axle mounting hole 15. The hub 10 is provided with a meat thin portion 16. The core support hole 14 is also used as a sand removing hole during casting.

As shown in FIG. 1, the spokes 30 extend from the apex 13 of the triangle of the hub 10 toward the rim 20 and the sides 17 of the triangle.
It extends on the extension line of. That is, six spokes 30 are provided, and the space between the hub 10 and the rim 20 is divided into six, and the space is divided into a large axle hole H1 and a small axle hole H2. There is. As shown in FIG. 3, the spoke 30 has a T-shaped cross section, and a rib 31 projects integrally with the large axle hole H1 side in FIG.

The rim 20 has ribs 21 on the inner circumference of the large axle hole H1.

In the above structure, the present invention is directed to the axle direction A (second
The hub is set in the shape of a hollow box that is almost triangular when viewed from the figure.
The spokes 30 extend from the apex of the ten to the rim 20, so that the spokes 30 connecting the hub 10 and the rim 20 are shortened, so that the spokes 30 can be made thin. On the other hand, the rim 20 is supported by the six spokes 30, and therefore, the span S of the rim 20 supported by the spokes 30 becomes about the same as that of the wheel of five spokes, so that the rim 20 can be made thin. . In this way, the spokes 30 and the rim 20 can have a thin shape while maintaining rigidity,
Even with six spokes 30, it is lighter than a five-spoke wheel, and weighs about the same as a hollow three-spoke wheel. Further, the integrally molded hollow box-shaped hub 10 has high bending rigidity.

Although the hub 10 is large, since it is a hollow box shape integrally molded, the bending rigidity can be improved and the weight can be reduced. Together with the spoke 30 and the rim 20, the wheel as a whole can be lightweight while maintaining the rigidity. .

Also, since the rim 20 is supported by the hub 10 by means of 6 spokes 30, a wheel with 5 spokes (Fig. 5).
The rigidity balance against the load in the axle direction A (FIG. 2) is improved to the same extent or more.

Further, since the spokes 30 extend from the apex 13 to the triangle of the hub 10 in the shape of an extension of the side 17 of the triangle, the spokes 30 are inclined with respect to the normal line of the circular rim 20. Therefore, when the impact force from the road surface is applied to the rim 20, the impact force can be buffered.

Further, in this embodiment, since the entire wheel is integrated, the productivity is excellent, and since the spokes 30 have a T-shaped solid cross section, for example, only the small hub 10 is provided with a core (not shown). It may be molded by. Therefore, the castability is superior to the wheel having the hollow spokes 52 shown in FIG.

The shapes of the ribs 21 and 31 are not limited to the above-described embodiment, but the appearance design elements for giving a feeling of rotation, like the other embodiments of FIG.
May be changed.

[Effect of device]

As described above, according to the present invention, six spokes are formed on the extension line of the side of the triangle from the apex of the hub which is integrally formed and is set in the shape of a single triangular hollow box when viewed from the direction of the axle. The extended length reduces the span and spokes of the rims supported by the spokes while maintaining high rigidity, making the wheel as light as a three-spoke wheel, while maintaining a high clearance between the hub and the rim. Are connected by 6 spokes, the rigidity balance with respect to the load in the axial direction is improved to the same extent as or more than the wheel of 5 spokes. That is, the wheel of the present invention has the advantages of both a three-spoke and a five-spoke wheel.

In particular, since the hub is an integrally molded hollow box shape, bending rigidity is improved, and the entire wheel including the hub, the spokes, and the rim is also integrated, resulting in excellent productivity.

Further, since the spokes extend on the extension lines of the sides of the triangle, the impact force applied to the wheel can be buffered.

[Brief description of drawings]

FIG. 1 is a front view of a wheel showing a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the wheel, and FIG. 3 is II of FIG.
A sectional view taken along line I-III, FIG. 4 is a front view of a wheel showing another embodiment, FIG. 5 is a front view of a wheel having a conventional five-spoke, and FIG. 6 is a wheel having a conventional three-spoke. FIG. 10 …… Hub, 13 …… Triangle vertex, 17 …… Triangle side,
20 …… rim, 30 …… spoke, 40 …… outer wall, 41 …… peripheral wall.

Claims (1)

[Scope of utility model registration request] 1. A wheel in which spokes extend from a hub mounted on an axle toward a rim, wherein the hub is integrally formed with the spoke and the rim, and has a single triangular box shape when viewed from the direction of the axle. And an outer wall that is spaced apart in the axle direction, and a hollow portion is formed inside surrounded by the peripheral wall of the hub and the outer wall, and an extension of the side of the triangle from the apex of the triangle. A wheel characterized in that the above-mentioned spokes are provided along a line.