JP2642330B2 - Vehicle wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wheel in which a hub, a rim, and a spoke are integrally formed to increase the rigidity and reduce the weight.

[0002]

2. Description of the Related Art Conventionally, measures have been taken to increase the rigidity and reduce the weight of a vehicle wheel. One example of such a structure is disclosed in, for example, Japanese Utility Model Laid-Open No. 58-1648.
No. 01 publication. This vehicle wheel is a wheel in which the rim, spokes, and hub are integrally cast with a light alloy. Holes are provided from the rim toward the spokes, and a part of the spokes is formed hollow. By forming a hollow part in the part, it is possible to form a wheel that is lighter and stronger than the conventional solid spoke part, and communicates the hole from the rim to the spoke part with the inside of the tire As a result, the amount of air enclosed in the tire is increased, and the cushion performance of the tire can be improved.

[0003]

However, in the above-described conventional vehicle wheel, the hollow cylindrical spoke portion is formed integrally with the rim, and the cushioning performance of the tire is improved, but the air volume of the tire increases. This increases the amount of deformation of the tire. Therefore, if a tire used for a general wheel having a solid spoke portion is mounted on the conventional wheel and an attempt is made to obtain the same tire contact surface as when mounted on a general wheel, the air pressure must be increased. There is an inconvenience. Further, the area of the inner wall surface on the wheel side for sealing the air pressure in the tire is increased, and it is necessary to increase the wall thickness including the spokes in particular, in order to maintain airtightness. Therefore, conventionally, it is desired to address the above-described inconvenience, and the present invention is intended to solve such a problem remaining in the related art.

[0004]

SUMMARY OF THE INVENTION The present invention provides a vehicle wheel capable of effectively solving the above-mentioned problems. This vehicle wheel comprises a hub having an axle mounting hole formed therein, and a tire. A rim to be mounted and a plurality of spokes connecting the rim and the hub are integrally formed, the hub is formed in a hollow cylindrical shape around an axle, and the spokes are formed in a cylindrical shape. And one end is connected to the outer peripheral surface of the hub and arranged radially around an axle.The rim is formed in an annular shape with the other end of the spoke portion joined to the inner surface of the rim. One end of the spoke portion is formed integrally with the inside of the spoke portion and the inside of the hollow cylindrical hub so as to form a hollow portion, and the hollow portion is provided in the hub. Open to each other Passed, the other end of the tubular spokes is closed by the rim are formed integrally, the
Attached part of brake disc is integrally formed on outer peripheral wall of hub
It is characterized by being.

[0005]

In the vehicle wheel according to the present invention, the cylindrical spoke portion and the hollow cylindrical hub are joined so that the interior of the hub is a continuous hollow portion. Each spoke can be formed in a cylindrical shape with one core. In addition, it can be made lightweight and highly rigid from a hollow cylindrical hub, a cylindrical spoke portion and a rim that are integrally molded, and the other end of the spoke portion is closed by the rim. The air capacity in the tire is not increased, and the airtightness of the spoke portion is not considered. Further, since the opening is provided in the hub having a large capacity, it is possible to extract the core or the like at the time of molding using this opening.

[0006]

FIG. 1 is a block diagram showing an embodiment of the present invention.
A description will be given with reference to FIG. In these figures, reference numeral W denotes a vehicle wheel according to the present embodiment, and the hub 1, the spokes 2 and the rim 3 are integrally cast of a light alloy such as an aluminum alloy. It is molded.

The hub 1 has an axle mounting hole 1 at its center.
a is formed and the inside thereof is hollow to form a cavity 4a communicating with the axle mounting hole 1a.
A plurality of hubs (10 in FIG.
The reinforcing ribs 1b of the present invention are formed radially of the hub 1 so as to protrude outward from both side surfaces. In addition, the hub 1 is provided with an outer peripheral portion.
Lines extending radially outward from the
) Are formed.

As shown in FIGS. 1 and 2, these spoke portions 2 have a substantially truncated quadrangular pyramid shape.
The base end on the side of the hub 1 is thick, and gradually decreases from the base end toward the other end on the side of the rim 3, in other words, a substantially tapered shape that becomes thinner from the side of the hub 1 to the side of the rim 3. Is formed. The inside of the spokes 2 is hollow, the base end on the hub 1 side communicates with the cavity 4 a formed in the hub 1, and the outer end is the rim 3.
Each of the cylindrical hollow portions 4b. The cavity 4a is mutually connected to the outside by the axle mounting hole 1a, which is an opening provided in the hub 1. Further, the thickness of each of the spoke portions 2 along the length direction of the axle mounting hole 1a is substantially uniform as shown in FIG. Further, mounting holes 5 for brake discs are formed on the outer peripheral wall of the hub 1 and between adjacent base ends of the spokes 2. A rim 3 is formed at the tip of each of the spokes 2.

The rim 3 is formed in an annular shape so as to straddle between the respective tips of the spoke portions 2..., And as shown in FIG. 2, its cross section has a substantially U-shape for mounting a tire. The inner peripheral surface 3a is formed so as to close the cylindrical hollow portion 4b of the spoke portion 2 at the distal end as described above.

According to such a vehicle wheel W, the cavity 4b of the spoke portion 2 is closed by the rim 3 to interrupt communication with the tire interior. And it is easy to manage in manufacturing.

Further, since the tip of the cavity 4b is closed by the rim 3, the capacity of the cavity communicating with the inside of the tire is set by the inner shape of the tire and the outer shape of the rim 3. As a result, The capacity of the cavity communicating with the inside of the tire is set almost uniquely regardless of the casting accuracy of the hub 1 and the spokes 2. As a result, the casting quality of the spokes 2 contributes to the improvement of the quality of the vehicle wheel W, and the characteristics set for the tire can be reliably obtained in a state where the tire is mounted on the vehicle wheel W.

The spoke portion 2 having the above-mentioned cylindrical hollow portion 4b has a large sectional modulus and a substantially uniform thickness, so that it has excellent rigidity. Since the portion 4b is communicated with the axle mounting hole 1a via the hollow portion 4a in the hub 1, the capacity of the hollow portion formed in the vehicle wheel W as a whole is large, thereby increasing the rigidity. Further, the vehicle wheel W whose weight is significantly reduced can be obtained.

The hollow portion 4 formed by the hollow portion 4a of the hub 1 and the cylindrical hollow portion 4b of the spoke portion 2 is a substantially star-shaped one centered on the axle mounting hole 1a. Become. In such a wheel, the cavity 4a in the hub 1
In forming the cylindrical hollow portion 4b in the spoke portion 2, an integrated star-shaped core can be used, whereby the configuration of the casting mold is simplified, and the hub 1, the spoke portion 2 .. And the rim 3 are integrally molded, which facilitates the manufacture.

Further, according to the vehicle wheel W,
When integrally casting by sand casting, a core (sand mold) in the cylindrical hollow portion 4b of the spoke portion 2 is pulled out from the axle mounting hole 1a which is an opening on the hub 1 side. The spokes 2 are tapered from the hub 1 toward the rim 3 and gradually become thicker toward the hub 1. It is unlikely that the inside of the cylindrical hollow portion 4b will be jammed. as a result,
The work of removing the sand mold from the hollow spokes 2 becomes easy, thereby improving the productivity.

In the above-described embodiment, the reinforcing ribs 1b are provided so as to protrude outward from both side surfaces of the hub 1. However, the present invention is not limited to this. It may be provided so as to protrude from the surface toward the inner cavity 4a.

[0016]

As described above, according to the vehicle wheel of the present invention , the following excellent effects can be obtained. a. The vehicle wheel of the present invention can use an integrated core when forming a hollow portion in a hollow columnar hub and a tubular hollow portion of a spoke portion, thereby forming a casting mold. Is simplified, and the hub, the spoke portion and the rim are integrally formed, so that the manufacture is easy. b. Further, in the vehicle wheel of the present invention, since the hub has a hollow cylindrical shape, the width of the axle support point of the hub can be widened without increasing the weight of the vehicle wheel itself, and the vehicle The rigidity of the vehicle wheel can be increased, and the rigidity of the vehicle wheel can be maintained to some extent even if the thickness of the spoke portion is reduced.
The vehicle wheel can be made highly rigid and lightweight as a whole. c. In the vehicle wheel according to the present invention, since the communication between the inside of the cylindrical spoke portion and the inside of the tire is cut off, the air capacity of the tire does not increase. Also, due to the increase in the air capacity, the amount of deformation of the tire does not increase, and the contact surface of the tire can be prevented from changing due to the increase in the amount of deformation of the tire, and the performance of the tire does not decrease. . That is, since the other end of the spoke portion is closed by the rim, the air capacity of the tire is set by the inner shape of the tire and the outer shape of the rim. As a result, the air capacity of the tire is reduced by the hub or It can be set almost uniquely regardless of the degree of casting of the spoke portion. Therefore, when the tire is mounted on the vehicle wheel, the set characteristics of the tire can be reliably obtained. d. The vehicle wheel of the present invention does not need to consider the airtightness of the cylindrical spoke portion, and the spoke portion of the spoke portion for ensuring the airtightness like a conventional wheel having a hole from the rim toward the spoke portion does not need to be considered. Since there is no need to increase the wall thickness, the wheel can be made lighter. e. Further, as described above, it is not necessary to consider the airtightness of the cylindrical hollow portion of the spoke portion, so that the manufacturing control can be facilitated as compared with the conventional wheel. f. Also, a hollow cylindrical hub, a cylindrical spoke portion,
Since the rim and the rim are integrally formed, the rigidity in the direction orthogonal to the circumferential surface of the vehicle wheel can be increased, and the wheel is excellent as a wide tire wheel. g. In addition, the hollow portion communicates with the outside through an opening provided in the hub, and the opening provided in the hub having a large capacity can be used for removing the core during molding, so that the core can be easily removed. . h. In addition, brakes are applied to the outer peripheral wall of the hub, which has high strength and rigidity.
Since the mounting part of the disc is integrally formed,
The strength and strength of the mounting part of the brake disc can be
And rigidity can be secured, and the overall weight can be reduced.
You.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a vehicle wheel of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

Reference Signs List 1 hub 1a axle mounting hole (opening) 2 spoke portion 3 rim 4, 4a hollow portion 4b cylindrical hollow portion 5 mounting hole for brake disk (mounting portion)

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-82601 (JP, A) JP-A-58-12856 (JP, A) JP-A-58-185301 (JP, A) 164801 (JP, U) Japanese Utility Model Showa 57-150001 (JP, U) Japanese Utility Model Showa 52-3801 (JP, U) Japanese Utility Model 5-30835 (JP, Y2) Japanese Utility Model 1778 (Taisho 11) (JP, U.S.A.) Y1 T) Jiko 14-19640 (JP, Y1) Jiko 7-928 (JP, Y1)

Claims (1)

(57) [Claims] 1. A hub having an axle mounting hole, a rim on which a tire is mounted, and a plurality of spokes connecting the rim and the hub are integrally formed, and the hub is centered on the axle. The spoke portion is formed in a hollow cylindrical shape, the spoke portion is formed in a tubular shape, and one end is connected to the outer peripheral surface of the hub, and the rim is formed in an annular shape in which the other end of the spoke portion is joined to the inner surface of the rim. One end of the cylindrical spoke portion is formed integrally with the inside of the spoke portion and the inside of the hollow cylindrical hub so as to form a hollow portion, and the hollow portion is integrally formed. The other end of the cylindrical spoke portion is closed and integrally formed by the rim, and the mounting portion of the brake disk is integrally formed on the outer peripheral wall of the hub. Being formed in Vehicle wheel, characterized.