JPH092001A - Spoke wheel for motorcycle - Google Patents

Abstract

PURPOSE: To provide a spoke wheel for a motorcycle capable of increasing the rigidity of the wheel and reducing the cost without increasing the weight. CONSTITUTION: A hub 4 and a rim 7 are connected by spokes 6 in this spoke wheel for a motorcycle. The spokes 6 are stretched into triangular shapes while the rim 7 side serves as the bottom side and the hub 4 side serves as vertexes (b) on the cross section parallel with an axle 10, and the vertex positions are dispersedly arranged on the right and left.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a spoke wheel for a motorcycle.

[0002]

2. Description of the Related Art As a wheel of a motorcycle, there is a spoke wheel in which a rim 2 is attached to a hub 1 by a spoke 3 as shown in FIG.

In this spoke wheel, the spokes 3 are alternately attached to the hub 1 from left to right side ends of the hub 1 having a required width in the axial direction to the center position of the rim 2 in the width direction, or the spokes 3 are alternately attached to the hub 1 or every required number. And is stretched so as to form an isosceles triangle whose apex a is the center position in the width direction of the rim 2 in a sectional view parallel to the axle.

[0004]

However, in the above-mentioned conventional spoke wheel, the spoke mounting position on the rim 2 side is the rim 2.
Since it is concentrated in the center of the width direction of the wheel, the rigidity of the assembled wheel is substantially determined by the size of the spokes 3,
Therefore, there is a limit to increase the rigidity of the wheel. In addition, spokes 3 have the required rigidity.
Has to be increased in size, which causes a problem of increasing weight and cost.

In view of this, an object of the present invention is to provide a spoke wheel for a motorcycle, which can increase the rigidity of the wheel without increasing the weight and can reduce the cost.

[0006]

As a means for solving the problems of the prior art, the present invention is a spoke wheel of a motorcycle in which a hub and a rim are connected by a spoke, and the spoke is an axle. It is characterized in that it is stretched in a triangular shape having a rim side as a bottom side and a hub side as an apex in a cross-sectional view parallel to the apex, and the apex positions are dispersedly arranged on the left and right.

[0007]

[Function] Since the spokes are stretched so as to form a triangular shape having the rim side as the base and the hub side as the apex in a cross-sectional view parallel to the axle, and the apex positions on the hub side are distributed left and right. The spoke mounting positions on the rim side have a certain width between the left and right in the width direction of the rim, and the spokes located on the inner side are crossed on the way, which creates a bruise, which increases the rigidity of the wheel.

Further, since the rigidity of the wheel is increased in this way, the size of the spoke can be reduced when the same rigidity as the conventional one is required, and the cost and the weight of the wheel can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

As shown in the cross section of the half portion parallel to the axle in FIG. 1, the other end of the spokes 6, 6 whose one end is attached to the spoke attachment portion 5 on one axial side of the hub 4 has the rim 7 at the other end. The spoke attachment portions 8, 8 on both sides in the axial direction (width direction) are distributed to the left and right with a space L, and the nipples 9, 9 inserted into the rim 7 are screwed with screw portions 6a, 6a at the ends of the spokes 6, 6. When the heads 9a, 9a of the nipples 9, 9 are rotated by a tool, the spokes 6, 6 are pulled and attached in a tensioned state. As a result, in a cross-sectional view parallel to the axle 10, as shown in FIG. 1, the rim 7 is stretched so as to form an inverted triangle with the space L as the base and the hub 4 as the apex b.

The positions of the vertices b on the side of the hub 4 are alternately or laterally arranged in an appropriate number, and therefore, regarding two sets of spokes, as shown in FIG. 1, the rim 7 side is the bottom side and the hub 4 side is the vertices. Inverted triangles b and b are intersected.

Thus, the spokes 6 on the rim 7 side are
Since the mounting positions of 6 are arranged at intervals L on the left and right in the width direction of the rim 7, the spokes 6, 6 located outside
As for the trapezoid, the spokes 6 and 6 located on the inner side cross in the middle to form a brace, which increases the rigidity of the wheel including the rim 7.

[0013]

As described above, according to the present invention, the spokes are stretched so as to form a triangular shape having the rim side as the bottom side and the hub side as the apex in a sectional view parallel to the axle, and the hub side thereof. Since the apex positions of the are distributed to the left and right, the spoke mounting positions on the rim side are spaced in the width direction, and the rigidity of the wheel including the rim can be increased. Further, when it is not necessary to increase the rigidity, the size of the spoke can be reduced, and the weight of the wheel can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing an embodiment of a spoke wheel according to the present invention.

FIG. 2 is an enlarged cross-sectional view of the attachment portion between the spoke and the rim in FIG.

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a sectional view of a half portion of a conventional spoke wheel.

[Explanation of symbols]

 1,4 Hub 2,7 Rim 3,6 Spoke 9 Nipple 10 Axle L Spoke attachment distance to rim a, b Apex

Claims (1)

[Claims] 1. A spoke wheel of a motorcycle in which a hub and a rim are connected by a spoke, wherein the spoke is stretched in a triangular shape having a rim side as a bottom side and a hub side as an apex in a sectional view parallel to an axle. In addition, the spoke wheels for motorcycles are characterized in that the apex positions are distributed to the left and right.