JPH072101U - Motorcycle Press Wheels - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a press wheel in which a disk for a disc brake can be easily attached to the press wheel. [Structure] A flange piece provided with bolt holes at extended portions 6a protruding at equal intervals in the outer peripheral radial direction is welded to an outer peripheral portion at one end of a steel pipe axle cylinder 1 in which a wheel shaft is inserted and supported. A disc brake disc 7 is fastened to the flange piece 6 thereof, and a steel plate rim 3 is welded to the outer circumference of a steel plate press spoke 2 welded to the opposite side of the axle cylinder 1, and the width of the rim 3 is welded. The directional center A is disposed on the disc side from the longitudinal center position B of the axle cylinder 1, and a reinforcing plate 4 is disposed between the side surface of the spoke 2 and the axle cylinder 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement in a press wheel used for a vehicle such as a motorcycle.

[0002]

[Problems to be solved by conventional techniques and devices]

 If a steel plate is pressed to provide spokes and the axle cylinder and rim are welded to this to make wheels, it is cheaper than light alloy cast wheels, and hubs and rims are connected using multiple spoke wires. It can be cheaper than the ones. However, when mounting a disc brake on a wheel, the disc mounting boss of the disc brake can be easily provided by integral casting in the case of using a light alloy casting wheel or a casting hub. Since it is necessary to weld the boss pieces to the spokes made by the press, the work becomes troublesome and the alignment work with the wheel shaft is also difficult.

In view of the above point, the present invention has an object to obtain a press-made wheel in which a disk for a disc brake can be easily attached to the press-made wheel.

[0004]

[Means for Solving the Problems]

 According to the present invention, a steel tubular axle cylinder having a wheel shaft inserted therein is supported, and a bolt hole is formed in an extension portion that is welded to an outer peripheral portion of one end of the axle cylinder and is projected at equal intervals in the outer peripheral radial direction. The flange piece, the disc brake disk that is detachably fastened to the bolt hole of the flange piece, and the center in the width direction are arranged on the side opposite to the center of the axle cylinder in the length direction. A steel plate rim, and a steel plate press spoke whose outer peripheral bent flange portion is fixed to the inner peripheral surface of the rim, and whose inner peripheral surface is fixed to the outer circumference of the axle cylinder on the disc side from the widthwise center of the rim. , One end of which is welded to the outer circumference of the axle cylinder at an appropriate distance from the fixed portion between the spoke and the axle cylinder to the disc side, and the other end of which is a reinforcing plate welded to the side surface of the spoke. .

[0005]

[Operation] The inner peripheral portion of the spokes made of steel plate press is fixed to the outer periphery on the side opposite to the disc with respect to the center of the axle rim in the width direction, and the center of the rim provided in the outer periphery of the spoke in the width direction is the axle By disposing it on the side opposite to the disc from the center position in the length direction, one end of the axle cylinder projects to one side of the wheel, and the disc for disc brake is attached to that part. You can secure enough space. Further, since the spokes, the reinforcing plate, and the fixing portion of the flange piece such as the welding to the axle cylinder can be relatively separated from each other, the welding work can be facilitated and the influence of the welding heat can be prevented. .

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the drawings, reference numeral 1 is an axle cylinder in which a wheel shaft is inserted and supported, and the axle cylinder 1 cuts a steel pipe into an appropriate length and cuts both ends to form a rim 3 described later. The dimension in the axial direction is larger than the width of. A bending flange 2a on the inner peripheral side of the spoke 2 made of steel plate press is welded to the outer periphery of the axle cylinder 1 near one end, and a bending flange 2b on the outer periphery of the spoke 2 is connected to the rim 3a. Is welded to the inner peripheral surface of. The welded portion between the axle cylinder 1 and the spoke 2 is located on one side of the rim center A at the center of the rim 3 in the width direction, and the rim center A is located at the center position B of the axle cylinder 1 in the length direction. It is located on the welding side with. The spokes 2 are formed by punching a steel plate into a predetermined shape and arcuate section, and the rim 3 is formed by rolling a steel plate into a ring shape.

On the other hand, the concave curved surface side of the spoke 2 is welded to the other end of the reinforcing plate 4 whose one end is welded to the outer periphery of the axle cylinder 1 which is appropriately separated from the welded part of the spoke 2 and which is near the center. There is.

A step portion 5 is formed on the other end side of the axle cylinder 1 protruding toward the concave curved surface of the spoke 2, and a core hole of a flange piece 6 is fitted and welded to the step portion 5. . The flange piece 6 is provided with three extending portions 6a protruding at equal intervals in the outer peripheral radial direction, and bolt holes 6b are provided in each of the extending portions 6a. A core hole of a disc 7 for disc brake is further fitted into the step portion 5 of the axle cylinder 1, the disc 7 is superposed on the flange piece 6, and a bolt 8 inserted into a bolt hole 6b and It is fastened with a nut 9.

The axle cylinder 1, the spokes 2, and the rim 3 can be assembled and welded regardless of the disc 7. By inserting the flange piece 6 into the step portion 5 on the other side of the axle cylinder 1, the flange piece 6 can be aligned and face-to-face and welded regardless of the spoke 2. Thus, the assembly and welding work can be easily performed, the cost can be reduced, and the accuracy of the flange piece 6 can be maintained. The disk 7 may be fixed to the flange piece 6 later with the bolt 8 and the nut 9, which facilitates the assembling work.

[0011]

[Effect of device]

 As described above, in the present invention, the inner peripheral side of the spoke is fixed to one side of the rim center of the axle cylinder, and the flange piece for fastening the disc brake disk is welded to the other end side of the axle cylinder. Furthermore, since one end of the reinforcing plate is welded between the two, the axle cylinder can be widely used in the axial direction, and welding work etc. can be easily performed when fixing the above three members such as spokes to the axle cylinder. Moreover, since the welds are relatively distant from each other, distortion due to welding heat is unlikely to occur even though the steel plate is made by pressing, and because the disc and the spokes and the reinforcing plate are distant from each other, the load from the wheel and the load from the disc to the wheel The braking load is dispersed, which is advantageous in terms of strength, and even pressed products can withstand the load sufficiently. Moreover, since the axle cylinder is relatively long, the support width of the wheel shaft can be widened and the lateral tire load can be effectively supported. Further, the flange piece for mounting the disc brake disc is provided with bolt holes at the extending portions protruding at equal intervals in the outer peripheral radial direction, and the disc is mounted by the bolt holes, so that the disc mounting position is the axial center. It is possible to increase the torque by arranging it from the position away from, and it is possible to sufficiently withstand the shearing force even with a bolt having a relatively small diameter. Furthermore, since the rim center is offset to the disc side from the center position in the longitudinal direction of the axle cylinder, the axle cylinder protrudes to one side of the wheel, and the disc brake disc is arranged in that part. Since there is enough space for the braking device.

[Brief description of drawings]

FIG. 1 is a partially omitted front view of a press-made wheel of the present invention.

FIG. 2 is a vertical cross-sectional view of a press-made wheel taken along line II-II in FIG.

[Explanation of symbols]

 1 Wheel cylinder 2 Spokes 3 Rim 6 Flange piece 7 Disc

Claims (1)

[Scope of utility model registration request] 1. A steel tube-made axle cylinder having a wheel shaft inserted and supported therein, and a bolt hole at an extending portion which is welded to one end outer peripheral portion of the axle cylinder and protrudes at equal intervals in the outer peripheral radial direction. The formed flange piece, the disk for the disk brake that is detachably fastened to the bolt hole of the flange piece, and the center in the width direction is arranged on the side opposite the disk from the center position in the length direction of the axle cylinder. A steel plate rim and a bent flange portion on the outer circumference are fixed to the inner peripheral surface of the rim, and a steel plate press spoke whose inner circumference is fixed to the outer circumference of the axle cylinder on the side opposite to the center of the rim in the width direction, and one end. A press wheel for a motorcycle, comprising: a reinforcing plate welded to the outer circumference of the axle cylinder at an appropriate distance from the fixed portion between the spoke and the axle cylinder to the disc side, and the other end welded to the side surface of the spoke.