JP6927079B2 - Vehicle wheel structure - Google Patents

Description

The present invention relates to a structure in which a wheel cap is attached to the front side of a disc wheel for a vehicle.

Patent Document 1 describes a structure in which a wheel cap is attached to the front side of a disc wheel.

The disc wheel is composed of a substantially tubular rim and a disc. The disk is provided with a hub hole in the center, and a large number of cooling holes are provided on the outer periphery thereof at equal intervals in the circumferential direction.

The hubcap has a disk-shaped substrate. A ring-shaped through hole is formed in the central portion of the substrate, and a plurality of ribs radially extending from the central portion to the outer peripheral edge portion are formed on the back surface side of the substrate. Between the ribs adjacent to each other in the direction, a guide path is formed in which air on the front side of the substrate is introduced from the through hole to the back side of the substrate as the wheel cap rotates and flows outward in the radial direction. As a result, when the disc wheel rotates, the ribs generate the air flow and discharge the hot air generated on the back side of the disc from the cooling holes.

Japanese Unexamined Patent Publication No. 10-324104

In Patent Document 1, since the wheel cap covers the entire front side of the disc wheel, the design is limited, and the size and formation position of the cooling hole of the disc wheel are restricted. There is concern that it will be difficult to achieve both aerodynamic performance and heat dissipation performance.

In view of such circumstances, an object of the present invention is to provide a wheel structure for a vehicle which is excellent in design and can achieve both aerodynamic performance and heat dissipation performance.

The wheel structure for a vehicle according to the present invention includes a disc wheel for a vehicle and a resin hubcap attached to the disc wheel, and the disc wheel has a hub and a rim connected by a large number of spokes. The hubcap is individually attached to each opening surrounded by the hub, the rim, and the spokes of the disc wheel, and has a through hole communicating with each opening near the center. The wheel cap is provided so that fins extending from the inner diameter side to the outer diameter side of the fan-shaped wall portion project to the back side in an inclined state on the back surface of the fan-shaped wall portion facing the rim of the disc wheel. The fan-shaped wall portion is provided with a slit for communicating the front side and the back side thereof so as to be close to the inclined side of the fin.

In this configuration, as the disc wheel rotates, the fins of the hubcap guide the air in the vicinity thereof to the slit side and rectify the air so as to push it out from the slit to the front side.

Due to such an air flow, hot air generated on the back side of the spokes of the disc wheel is discharged from the slit to the front side. As a result, the hot air generated on the back side of the spokes of the disc wheel can be positively discharged to the front side of the spokes, and the heat dissipation performance is improved as much as possible.

Further, since the hot air outlet is made into an elongated hole such as a slit, it is possible to suppress or prevent the aerodynamic performance from being impaired.

Further, since each wheel cap does not cover the spokes and openings of the disc wheel, but the through holes of the wheel cap communicate with the opening of the disc wheel, the design of the disc wheel Does not damage the wheel.

The present invention makes it possible to provide a wheel structure for a vehicle that is excellent in design and can achieve both aerodynamic performance and heat dissipation performance.

It is a perspective view which shows one Embodiment of the wheel structure for a vehicle which concerns on this invention from the front side. It is a top view which shows the state which attached the wheel cap to a disc wheel from the front side. It is a top view which shows the state before attaching a hubcap to a disc wheel from the front side. It is a top view which shows the wheel cap alone from the back side. It is a perspective view which shows the wheel cap alone from the front side. FIG. 5 is a perspective view showing a state in which the direction of the wheel cap alone is changed in FIG. It is an arrow view of the cross section of the line (7)-(7) of FIG.

Hereinafter, the best embodiment for carrying out the present invention will be described in detail with reference to the accompanying drawings.

1 to 7 show an embodiment of the present invention. In the figure, 1 indicates the entire vehicle wheel.

The wheel structure for a vehicle includes a disc wheel 1 and a large number of hubcaps 2.

The disc wheel 1 is fixed to an axle (not shown), and as shown in FIG. 3, the hub 11 and the rim 12 are connected by a large number (for example, five) spokes 13. ..

A hub hole 14 is provided in the center of the hub 11, and a large number of bolt holes 15 are provided at equal intervals on the outer diameter side of the hub hole 14 in the hub 11.

Further, an opening 16 is provided in the area surrounded by the hub 11, the rim 12, and the spokes 13. The opening 16 is a through hole that communicates the front side and the back side of the spoke 13.

Although not shown, a disc brake device is provided on the vehicle body side to which the disc wheel 1 is attached. Therefore, frictional heat generated from the disc brake device and friction generated from the tire attached to the disc wheel 1 during vehicle braking are provided. Due to the heat, high-temperature hot air tends to be trapped on the inner diameter side of the disc wheel 1. This high-temperature hot air can be discharged to the front side from the opening 16 of the disc wheel 1, but it is difficult to be discharged during traveling.

In view of such circumstances, the wheel cap 2 mounted on the disc wheel 1 has been devised in order to positively discharge the hot air to the front side of the spokes 13, and will be described in detail below.

As shown in FIGS. 1 to 3, the wheel cap 2 is individually and detachably fitted at a position where each opening 16 of the disc wheel 1 exists.

The wheel cap 2 is formed in a substantially trapezoidal shape when viewed from the front side, and a through hole 21 for communicating the front side and the back side is provided near the center thereof.

The through hole 21 is arranged so as to communicate with each opening 16 of the disc wheel 1 in a state where the wheel cap 2 is attached to the disc wheel 1. Specifically, the through hole 21 is set smaller than the opening 16 and is provided at a position where the through hole 21 fits within the opening 16.

Further, the fan-shaped wall portion 22 arranged to face the rim 12 of the disc wheel 1 in the hubcap 2 is provided with a large number of fins 23 and a large number of slits 24. Three fins 23 and three slits 24 are provided in this embodiment.

The fins 23 are provided on the back surface of the fan-shaped wall portion 22 so as to extend from the inner diameter side to the outer diameter side and project to the back side in an inclined state.

The slit 24 is provided in the fan-shaped wall portion 22 so as to be close to the inclined side of the fin 23 and to communicate the front side and the back side in the region from the substantially central position in the radial direction to the outer diameter side of the fin 23.

As shown in FIG. 2, the fins 23 and the slits 24 are in the rotation direction of the disc wheel 1 with respect to the virtual straight line 200 whose central axis 100 along the longitudinal direction is along the radial direction from the center of the disc wheel 1 (see arrow 300). It is tilted by a predetermined angle α toward the upstream side of.

Further, as shown in FIGS. 4 to 7, the fins 23 are inclined with respect to the back surface of the fan-shaped wall portion 22. Specifically, as shown in FIG. 7, the fin 23 is tilted by a predetermined angle β toward the downstream side in the rotation direction 300 of the disc wheel 1 with respect to the virtual perpendicular line 400 extending vertically from the back surface to the back side of the fan-shaped wall portion 22. ing.

Further, in the wheel cap 2, ridges 25 are provided on two sides of the inner peripheral edge of the through hole 21 along the spokes 13 of the disc wheel 1. The ridge portion 25 is provided so as to project vertically from the surface of the wheel cap 2 toward the front side (outside). The ridge portion 25 is provided to prevent or prevent the air on the front side from being caught in the back side from the through hole 21 during the rotation of the disc wheel 1.

Such a hubcap 2 is formed of, for example, a synthetic resin, a polyamide resin reinforced with glass fiber, or the like. This makes it possible to reduce the weight of the wheel cap 2 and increase the degree of freedom in shape.

A locking portion (not shown) is provided at a predetermined position on the back side of the wheel cap 2 (see, for example, a position surrounded by a circle in FIG. 4). The wheel cap 2 is held by the disc wheel 1 by hooking the locking portion on the inner peripheral edge of the opening 16 of the disc wheel 1.

Next, the operation during traveling by the wheel structure for the vehicle of this embodiment will be described.

When the disc wheel 1 rotates, as shown in FIG. 7, the fin 23 of the wheel cap 2 guides the air in the vicinity thereof to the slit 24 side and rectifies the air so as to push it out from the slit 24 to the front side (outside).

Due to such an air flow, hot air generated on the back side (inside) of the spokes 13 of the disc wheel 1 is discharged from the slit 24 to the front side (outside). As a result, the hot air generated on the back side of the spokes 13 of the disc wheel 1 can be positively discharged to the front side of the spokes 13, and the heat dissipation performance is improved as much as possible.

Further, since the hot air outlet is made into an elongated hole such as a slit 24, it is possible to suppress or prevent the aerodynamic performance from being impaired.

Further, since each wheel cap 2 does not cover the spokes 13 and the opening 16 of the disc wheel 1 and the through hole 21 of the wheel cap 2 communicates with the opening 16 of the disc wheel 1, the disc wheel The design of 1 is not impaired.

As described above, according to the embodiment to which the present invention is applied, it is possible to provide a wheel structure for a vehicle which is excellent in design and can achieve both aerodynamic performance and heat dissipation performance.

The present invention is not limited to the above embodiment, and can be appropriately modified within the scope of claims and within the scope equivalent to the scope.

For example, in the above embodiment, the number of fins 23 and slits 24 is not limited and can be arbitrarily changed, and the shapes thereof are also not limited and can be arbitrarily changed. Is.

The present invention can be suitably used for a structure in which a wheel cap is attached to the front side of a disc wheel for a vehicle.

1 disc wheel
11 hub
12 rims
13 spokes
14 Hub hole
15 bolt holes
16 Aperture 2 Hubcap
21 Through hole
22 Fan-shaped wall
23 fins
24 slit 100 center axis 200 virtual straight line

Claims (1)

It has a disc wheel for vehicles and a resin hubcap that can be attached to this disc wheel.
The disc wheel has a configuration in which a hub and a rim are connected by a large number of spokes.
The hubcap is individually attached to each opening surrounded by the hub, the rim, and the spokes of the disc wheel, and a through hole communicating with each opening is provided near the center. ,
On the back surface of the fan-shaped wall portion of the wheel cap facing the rim of the disc wheel, fins extending from the inner diameter side to the outer diameter side of the fan-shaped wall portion are provided so as to project to the back side in an inclined state.
A wheel structure for a vehicle, characterized in that the fan-shaped wall portion is provided with a slit that communicates the front side and the back side so as to be close to the inclined side of the fin.

Images