JPH101081A - Dynamo with brake for bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dynamo with a brake for a bicycle, which is small-sized as a whole with enhanced braking performance, little fear of failing and suppressed braking noise generated. SOLUTION: A bicycle dynamo built in a hub includes a separator plate 16 provided in a hub body 3 incorporating the dynamo on its one side to separate the dynamo from the outside, a brake drum 19 integrally fitted onto the inner periphery of the shell of the hub body outside the separator panel 16, two brake shoes 20 and 21 provided inside the drum 19, brake linings 22 fixed on the outer peripheries of the brake shoes 20 and 21 respectively, and a cam mechanism provided for tensioning the brake shoes 20 and 21 to brake the hub body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle hub generator incorporating a brake.

[0002]

2. Description of the Related Art As a conventional bicycle hub-integrated power generator with a built-in brake, for example, Japanese Utility Model Publication No. 57-5
As disclosed in Japanese Patent No. 1178, a combination of a band brake and a generator in which a generator is disposed in an externally tightened band brake for a rear wheel to transmit power to a rotation indicator light has been proposed. . Further, as disclosed in Japanese Patent Application Laid-Open No. 8-72767, magnets are arranged and provided on the inner periphery of a heat-dissipating cap which is fixed to a wheel hub and integrally formed on a drum which rotates integrally with the hub, and is fixed to a hub shaft. There has also been proposed a power generator with an inwardly expanding brake in which a cover is provided with a coil. Further, as a front wheel brake, a caliper brake that abuts on a rim to apply a brake is often used.

[0003]

The above-mentioned conventional power generator with brake has the following problems. (1) In rainy weather, water easily enters inside, so that the braking performance is reduced. (2) Since the outer diameter is large and the rear wheel is mounted, the wiring becomes long, resulting in an increase in cost. (3) Since the brake unit and the power generation unit are close to each other, heat generated during braking is transmitted to the power generation unit, and the power generation device is likely to fail. (4) Since the brake section and the power generation section are close to each other, lining abrasion powder and dust at the time of braking adhere to the power generation section, and the power generation device is likely to fail. Also, caliper brakes as front wheel brakes are
Since the sliding surface is exposed, the brake gets wet when it rains, and there is a problem that the braking performance is greatly reduced when it rains.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, magnets are provided circumferentially on the inner periphery of a hub body of a bicycle wheel, and the magnets are provided on the outer periphery of a hub shaft. In a bicycle power generator with a built-in hub provided with coils fixed so as to face each other, an isolation panel for isolating the power generator from the outside is provided on one side of the hub body having the power generator built therein. , A brake drum is integrally fitted to the inner periphery of the hub body, a brake shoe is provided inside the drum, a braking lining is fixed to the outer periphery of the brake shoe, and the brake shoe is expanded. A cam mechanism is provided, and the hub body is braked by expanding the brake shoe by the cam mechanism to constitute a power generator with a brake device for a bicycle.

The hub of the bicycle wheel according to the first aspect of the present invention may be a hub of a bicycle front wheel.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In the figure, 1 (see FIG. 2) is a front fork of a bicycle, 2 is a front wheel shaft supported by the front fork 1, and 3 is a hollow cylindrical hub provided rotatably with respect to the front wheel shaft 2 via a bearing 4. Body, 5 is the inner periphery of hub body 3 (right side in FIG. 2)
The conductor yoke 6 has a plurality of magnets arranged in the circumferential direction on the inner periphery of the conductor yoke 5.

Reference numeral 7 denotes a body of a cylindrical stator fixed to the front wheel shaft 2 inside the magnet 6, reference numeral 8 denotes a cylindrical cover surrounding the body 7, and reference numeral 9 denotes a plurality of covers provided on the outer periphery of the cover 8. The coils 10, 10 are yokes that cover the coil 9, and 11 is a lead wire drawn from the coil 9. The stator of the generator is formed by the body 7, the cover 8, the coil 9, and the yoke 10 as described above. The hub body 3, the conductor yoke 5, and the magnet 6 form a rotor of the generator. Note that 12, 1 in FIG.
3 is a side plate provided on both sides of the stator, 14 is a washer, 1
5 is a lock nut.

In this embodiment, an isolation panel 16 is provided on one side (left side in FIG. 2) of the hub body 3 having a built-in power generation device for isolating the power generation device from the outside. That is, the isolation panel 16 is formed in a disk shape having a center hole 16a, and the outer peripheral surface of the isolating panel 16 is pressed into the inner peripheral surface of the hub body 3,
The bearing 17 is inserted into the center hole 16a,
A sleeve 18 is inserted between the inner race and the front wheel axle 2 and is locked by a lock nut 15.

The outside of the isolation panel 16 (left side in FIG. 2)
A brake drum 19 is integrally fitted to the inner periphery of the body of the hub body 3 of the above, and two brake shoes 20, 21 (see FIG. 3) are provided inside the drum 19, and these brake shoes 20, 21 are provided. 21 each have a braking lining 22
Is fixed. 20a, 21a are brake shoes 20, 2
1 plate, 20b and 21b are arc-shaped plates,
Reference numerals c and 21c denote cam receivers connected to the lower ends of the brake shoes 20 and 21, respectively.

Reference numeral 23 denotes a base plate provided by fitting a center hole to the front wheel axle 2 so as to shield the open side of the hub body 3, and this base plate 23 has a disc-shaped substrate portion as shown in FIG. An arm 23a protrudes from the lower part toward one side (the right side in FIG. 1). Reference numeral 24 denotes a collar fitted to the front wheel shaft 2, and the base plate 23 is fixed to the front wheel shaft 2 by the collar 24 and the outer lock nut 15.

A base of an anchor pin 25 is fixed to the upper edge of the base plate 23. The anchor pin 25 is interposed between the upper ends of the two brake shoes 20, 21, and The ends of 20, 21 are supported.

A cam bearing 26 is provided on the lower edge of the base plate 23, and a cam 27 is pivotally supported with respect to the cam bearing 26 so as to be rotatable.
Is located between the cam receivers 20c, 21c connected to the lower ends of the brake shoes 20, 21, respectively.

Reference numerals 28 and 29 (see FIG. 3) denote return springs stretched between the brake shoes 20 and 21, respectively.
Is a thin-plate cover fixed to the base plate 23 to seal between the outer peripheral edge of the hub body 3 and the opening-side edge of the hub body 3.

A base of a lever 31 is fixed to the outside of the shaft 27a of the cam 27 via a nut 32. A free end of the lever 31 has a wire stopper 33 at its free end.
(See FIG. 2) is provided so that the operation wire can be fastened by the nut 34. At the end of the arm 23a of the base plate 23, a screw 35 for attaching an outer wire of the operation wire is provided. Reference numeral 23b denotes a mounting hole provided at an end of the arm 23a of the base plate 23.

Since the device of the present invention is configured as described above,
When this is mounted on the front wheel (or rear wheel) of the bicycle and the vehicle runs, the hub body 3 rotates with the rotation of the front wheel. When the hub body 3 rotates, a generator rotor composed of the conductor yoke 5 and the magnet 6 fixed to the hub body 3 forms a power generator composed of a body 7, a cover 8, a coil 9, and a yoke 10 fixed to the front wheel shaft 2. In order to rotate around the stator of the machine, an induced power is generated in the coil 9, and this current is supplied to the outside from the lead wire 11.

When a brake is applied while the bicycle is running, an inner wire 36 (a dashed line in FIG. 1) of an operation wire (not shown) connected to a brake lever (not shown) is provided.
1 is pulled in the direction of arrow B in FIG. 1, so that the cam 27 rotates via the lever 31 as shown by arrow C in FIG. 3, thereby pushing the brake shoes 20 and 21 on both sides outward, respectively. The left and right brake linings 22 are pressed against the inner surface of the brake drum 19 for braking.

[0017]

As described above, in the present invention, since both the brake device and the power generation device are integrally provided inside the hub body, the entire device becomes compact and the number of parts is reduced, so that the cost is reduced. Is reduced.

Since the brake device portion of the device of the present invention is located inside the hub body, even when it rains, it is difficult for water to enter the inside, so that there is no possibility that the braking performance is reduced.

Since the power generation device of the present invention is securely shielded by the brake device and the isolation panel, there is no possibility that the power generation device will be adversely affected by abrasion powder or dust on the lining during braking. That is, the failure of the power generation device is less likely to occur.

Since the brake drum of the device of the present invention is integrated with the hub body having a large heat capacity, the heat dissipation of the friction heat transmitted to the brake drum during braking is improved, and the braking performance is improved and the braking noise is reduced. The effect is obtained.

Further, when the device of the present invention is provided on the front wheel, the wiring can be shortened and the cost can be reduced as compared with the case where the device is mounted on the rear wheel.

[Brief description of the drawings]

FIG. 1 is an overall front view of the apparatus of the present invention.

FIG. 2 is a partial cross-sectional view taken along line AA of FIG.

FIG. 3 is a front view showing a brake unit of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front fork 2 Front wheel shaft 3 Hub 4 Bearing 5 Conductor yoke 6 Magnet 7 Stator trunk 8 Cover 9 Coil 10 Yoke 11 Lead wire 12, 13 Side plate 14 Washer 15 Lock nut 16 Isolation panel 16a Center hole 17 Bearing 18 Sleeve Reference Signs List 19 brake drum 20, 21 brake shoe 20a, 21a plate 20b, 21b arc-shaped plate 20c, 21c cam receiver 22 braking lining 23 base plate 23a arm 23b mounting hole 24 collar 25 anchor pin 26 cam bearing 27 cam 27a shaft 28, 29 return spring 30 cover 31 lever 32 nut 33 wire stopper 34 nut 35 screw for attaching outer wire 36 inner wire

Continued on the front page (72) Inventor Masaki Yamagishi 3-1-1 Nakazuma, Ageo City, Saitama Prefecture Inside Bridgestone Cycle Co., Ltd.

Claims (2)

[Claims] 1. A bicycle with a built-in hub, wherein magnets are provided on the inner periphery of a hub body of a bicycle wheel in a circumferential direction, and coils are fixed on an outer periphery of a hub shaft so as to face the magnets. In the power generator, an isolation panel for isolating the power generator from the outside is provided on one side of the hub body containing the power generator, and a brake drum is integrally fitted to the inner periphery of the hub body outside the isolation panel. A brake shoe is provided inside the drum, a braking lining is fixed to the outer periphery of the brake shoe, and a cam mechanism for expanding the brake shoe is provided. The cam mechanism expands the brake shoe. A power generator with a brake device for a bicycle, characterized in that the hub body is braked by the brake. 2. A power generator with a brake device for a bicycle, wherein the hub of the bicycle wheel according to claim 1 is a hub of a bicycle front wheel.