JP3047489U - Bicycle wheel - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To suppress the generation of wind noise and to reduce the air resistance to make it easier to ride, to prevent the occurrence of vertical blur due to the increase in strength, and to eliminate the danger of clothes being caught. A bicycle wheel (1) having a hub cylinder (2) at the center and an annular rim (4) integrally formed on the outer periphery of the hub cylinder (2) via a disc (3).
From the intermediate portion 3C to the annular rim 4 to increase the section modulus of the portion where stress is concentrated.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a wheel for a bicycle (all bicycles from a child to an adult including a unicycle).

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, a bicycle wheel has a hub tube, which is rotatably supported at the center, a plurality of spokes extending radially outward from the hub tube, and a tire connected to the outer end of the spoke. In some cases, the annular rim was integrally molded with a rigid resin.

[0003]

[Problems to be solved by the invention]

 In the above-mentioned conventional technology, the wind is cut off by the spokes during running, so there is a problem that wind noise is generated, the air resistance is large, vertical blur occurs, and the riding comfort is deteriorated. Need to be covered. In view of the above, an object of the present invention is to suppress the generation of wind noise and reduce the air resistance to make riding easier, to prevent a vertical blur due to an increase in strength, and to eliminate the possibility of clothes being caught.

[0004]

[Means for Solving the Problems]

 The present invention is a bicycle wheel in which a hub cylinder and an annular rim are integrally formed. In order to achieve the above-mentioned object, the following technical measures are taken. That is, an annular rim is integrally formed on the outer periphery of the center hub cylinder via a disk, and the thickness of the disk is gradually reduced from the hub cylinder to a radially intermediate portion and gradually increased from the intermediate portion to the annular rim. It is characterized by being carried out. By adopting such a configuration, it is possible to secure sufficient strength by increasing the section modulus of the portion where stress is concentrated by the load of the wheel, to secure sufficient strength, to reduce the weight of wind noise, and to reduce air resistance. This makes it easier to gather, eliminates vertical blur, eliminates the danger of clothes getting caught, and makes the disc unique by attaching various stickers to the disc.

Further, the present invention is characterized in that the disc is provided with one or a plurality of holes, whereby the pressure due to the cross wind can be reduced (the ventilation is improved), the weight can be reduced and the material can be saved. Can be achieved. The present invention has a configuration in which the center line of the valve mounting hole provided in the rim is inclined so as to intersect at an acute angle with respect to the center axis of the wheel. In addition to this, it becomes easier to install the tip nozzle of the air pump.

Further, the valve mounting hole is provided so that the center thereof is located outside the center in the width direction of the annular rim, and the contact surface of the valve nut provided on the disk side is formed by rimming the valve tip. By being inclined with respect to the wheel axis within a range that can be accommodated within the width, the valve outer end does not protrude from the side surface of the annular rim, and the valve can be stably fixed to the rim.

[0007] Furthermore, by providing a structure in which a contact seat of a valve nut is protruded on the disk side of the valve mounting hole, sink marks generated around the valve mounting hole during integral molding can be prevented, and the quality can be reduced. improves. Further, the present invention is a wheel having a hub tube at the center and an annular rim integrally formed on the outer periphery of the hub tube via a disk, wherein the disk, the hub tube and the annular rim are integrally formed of resin. The thickness of the disk is gradually reduced from the hub cylinder to an intermediate portion in the radial direction, and is gradually increased from the intermediate portion to the annular rim, and a plurality of holes defining a part of the annular rim are provided on the outer peripheral side of the disk. A valve mounting hole is provided on the rim so as to face the hole of the disk, and the valve mounting hole is provided on one side of the rim width direction, and a valve nut abutment seat is provided on the disk side of the valve mounting hole. By adopting a configuration in which the valve nut contact surface is slightly inclined outward in the rim width direction, air resistance during traveling can be reduced and wind noise can be suppressed to enable light traveling. Pressure reduction by cross wind Besides it is possible to facilitate and stabilize the lube mounting, it is possible to eliminate the risk of entrainment clothing.

[0008]

[Embodiment of the invention]

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The bicycle wheel 1 according to the present invention has a hub cylinder 2 supported at the center by a bicycle axle, and an annular rim 4 formed integrally with the hub cylinder 2 via a disc 3 on the hub cylinder. 2, the disk 3 and the rim 4 are integrally formed of a hard resin such as a nylon resin. The hard resin may be mixed with a reinforcing material such as magnesium or glass fiber.

The hub tube 2 includes a hub body mounting inner tube portion 5, an outer tube portion 6, and a plurality of connecting portions 7 arranged radially between the two tube portions 5, 6. The weight is reduced by reducing the amount of resin, and the cooling time during molding is shortened. As shown in FIG. 2, the thickness of the disk 3 is gradually reduced radially outward from the outer cylindrical portion 6 of the hub tube 2 and gradually increased from the intermediate portion 3C to the bottom 4A of the annular rim 4. Have been. That is, the thickness of the intermediate portion 3C in the radial direction of the disk 3 is reduced, and the thickness is gradually increased on the side of the hub cylinder 2 and the side of the rim 4 where the stress concentration due to the load occurs, so that the section modulus is increased. As a result, the weight is reduced while securing sufficient strength, and the occurrence of vertical blur can be prevented.

[0010] The disk 3 is provided with substantially semicircular holes 8 on the outer peripheral side, which define the bottom 4A of the annular rim 4, at five locations at half intervals so as to reduce the pressure against crosswinds, that is, reduce ventilation and weight. It is planned. It should be noted that even when the disk 8 is provided, the disk 3 is naturally designed so as to obtain a required section modulus of the outer peripheral portion. The annular rim 4 is formed by inserting a tire tube formed by the bottom portion 4A directly connected to the outer periphery of the disk 3 and the flange 4B provided on both sides of the bottom portion 4A on the outer side in the wheel radial direction. The tire has a circumferential groove-shaped tire fitting portion 9 into which a tire (not shown) is fitted.

The bottom 4A of the annular rim 4 is provided with a valve mounting hole 10 through which a valve V (see FIG. 3) of a tube is mounted. As shown in FIG. 3, the valve mounting hole 10 has a center close to one flange 4B of the rim 4 and a center line CV intersects the wheel center line C at an acute angle θ. It is provided at an angle. The center position of the valve mounting hole 10 is designed such that the outer end of the valve does not protrude from the outer surface of the rim flange 4B when the valve is fitted into the hole.

Further, the valve mounting hole 10 is formed so that the side 10A of the tire fitting portion 9 on the side where the center line CV is inclined is parallel to the inner surface of the flange portion 4B. The mold can be easily removed at the time, and the valve can be easily inserted. On the disk 3 side of the valve mounting hole 10, a contact seat 11 for a valve nut NV is protruded, and the valve nut contact surface 12 is accommodated in the seat 11 so that the tip of the valve V is accommodated within the width of the rim 4. Within the range, it is provided obliquely with respect to the wheel center axis C, that is, in a plane perpendicular to the valve mounting hole center line CV.

By providing the abutment seat 11 and forming the valve abutment surface 12 in an inclined shape, sink marks around the valve mounting hole 10 at the time of integrally forming the wheel 1 are prevented, and quality is improved. , Making it easier to remove the mold during molding. According to the above-described embodiment, it is possible to prevent longitudinal blur due to an increase in strength, suppress generation of wind noise during traveling, reduce air resistance, improve ride comfort, and reduce weight and materials. It can save energy and is easy to manufacture, and it is easy to install and stably fix the valve, making it very easy to attach and detach the tip nozzle of the air pump to and from the valve. In addition, it is easy to apply the seal to the disc 3, and various kinds of seals can be arbitrarily attached and replaced, from infants to students and adults, to provide wheels with rich personality.

The present invention is not limited to the above embodiment. For example, the arrangement and number of the holes 8 in the disk 3 can be arbitrarily selected, and the shape of the holes 8 is circular or long. In addition to adopting a circular or triangular shape, the portion where the valve mounting hole 10 is provided is other than the portion of the hole 8 of the disk 3, and a separate hole is provided for facilitating mounting of the valve and easy introduction of air. Further, the valve mounting hole 10 can be the same as the conventional one.

Further, the foil 1 according to the present invention can be made of a metal, for example, a light alloy such as an aluminum alloy, in addition to the hard resin. Further, it is also possible to adopt a structure in which an annular rim and a hub cylinder formed by pressing a steel plate and an annular steel plate are welded.

[0016]

[Effect of the invention]

 As described in detail above, according to the present invention, an annular rim is integrally formed on the outer periphery of the hub cylinder via the disk, and the thickness of the disk is gradually reduced in the radially outward direction from the hub cylinder and the annular rim is formed from the intermediate portion. By gradually increasing the ribs, the strength is increased, vertical vibration can be prevented, wind noise during driving can be suppressed, air resistance can be reduced, ride comfort can be improved, and weight reduction and production And cost reduction can be achieved.

[0017] Furthermore, even without the provision of the wheel cover, it is possible to eliminate the danger of clothes getting caught in the wheel or the possibility of the foot of a child or the like being pinched.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG.

FIG. 3 is an enlarged view of a portion B in FIG. 2;

FIG. 4 is an enlarged view as viewed from an arrow C in FIG. 1;

FIG. 5 is a sectional view taken along line DD of FIG. 4;

FIG. 6 is an enlarged view as viewed from an arrow E in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bicycle wheel 2 Hub cylinder 3 Disc 3C Intermediate part 4 Annular rim 8 hole 10 Valve mounting hole 11 Valve nut contact seat 12 Nut contact surface C Wheel center axis CV Valve mounting hole center line NV Valve nut V Valve θ Center line Intersection angle

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[Procedure amendment]

[Submission date] November 25, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 4

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 5

[Correction method] Change

[Correction contents]

Claims (6)

[Utility model registration claims] 1. A wheel having a hub cylinder at the center and an annular rim integrally formed on the outer periphery of the hub cylinder via a disk, wherein the thickness of the disk is an intermediate portion in a radially outward direction from the hub cylinder A wheel for a bicycle, which gradually decreases from the intermediate portion to the annular rim. 2. The bicycle wheel according to claim 1, wherein the disc has one or more holes. 3. The valve mounting hole according to claim 1, wherein a center line of the valve mounting hole provided in the rim is inclined so as to intersect at an acute angle with respect to a wheel center axis. Bicycle wheel. 4. The valve mounting hole is provided such that the center thereof is located outside the center in the width direction of the annular rim,
The contact surface of a valve nut provided on the disk side is inclined with respect to the wheel axis within a range where the valve tip can be accommodated within the rim width.
A bicycle wheel as described in. 5. The bicycle wheel according to claim 1, wherein a valve nut abutment seat protrudes from the disk side of the valve mounting hole. 6. A wheel having a hub tube at the center and an annular rim integrally formed on the outer periphery of the hub tube via a disk, wherein the disk, the hub tube and the annular rim are integrally formed of resin. The thickness of the disk is gradually reduced from the hub cylinder to an intermediate portion in a radially outward direction and gradually increased from the intermediate portion to the annular rim, and a plurality of holes are provided on an outer peripheral side of the disk to partition a part of the annular rim, A valve mounting hole is provided on the rim so as to face the hole of the disc, and is located closer to one side in the rim width direction,
A bicycle wheel, wherein a valve nut abutment seat is provided on the disk side of the valve mounting hole, and the valve nut abutment surface of the corresponding seat is slightly inclined outward in the rim width direction.