JPH0872767A - Hub power generating device with braking device for bicycle - Google Patents

Abstract

PURPOSE: To compact a power generator and improve heat radiation performance by fixing the center section of a heat radiation cap, to the internal peripheral surface of which ring-like magnets are fixed, to the boss section at one end of a wheel hub of a bicycle and fixing a brake drum having the internal peripheral surface of the heat radiation cap and a given ring-like space section as a part of the drum itself to the boss section. CONSTITUTION: A heat radiation cap 6, to the internal peripheral surface of which a ring-like magnet 5 is fixed, is threadedly fixed to a boss section 4 integral with a spoke mounting flange 2, and a brake drum 8 having the internal peripheral surface of the magnet 5 and a given ring-like space section 7 as a part of the drum 8 itself is also fixed to the boss section 4. The space section 7 is covered by a side cover 9, and a stator 15 comprising a coil 13 and a yoke 14 and an expanding type brake shoe 16 are mounted on this side cover 9. The brake shoe 16 is pressed against the brake drum 8 by swinging the working arm 17 attached to the external surface of the side cover through a wire by operating a lever for applying brake, resulting in the generation of braking force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hub power generator with a brake for a bicycle in which a power generator and an expansion type brake are integrally incorporated in a wheel hub of the bicycle.

[0002]

2. Description of the Related Art The applicant of the present invention has previously disclosed, for example, Japanese Patent Laid-Open No. 5-409.
We have proposed a power generator to be attached to the bicycle hub as shown in No. 11. Further, rim brakes and band brakes are well known as conventional bicycle braking devices.

[0003]

By the way, since the conventional externally tightened band brake is designed to tighten the outer circumference of the brake drum, there is little space for forming the power generator in the outer peripheral space portion, and the heat of the brake heat is radiated. However, there is a problem that the power generation output deteriorates due to the small exposed surface. The present invention aims to solve the above problems.

[0004]

In order to achieve the above-mentioned object, the present invention fixes a central portion of a heat-dissipating cap, which is annularly fixed to an inner peripheral surface of a magnet and fixed to one end boss of a bicycle wheel hub. , Fixing the brake drum having one side open with the inner peripheral surface of the heat dissipating cap and a predetermined annular space to the boss, and mounting the stator and expansion brake shoe consisting of a coil and a yoke on the inner surface of the side cover. The stator is inserted into the annular space, the expansion brake shoe is inserted into the brake drum, the side cover is fixed to the axle, and the brake shoe operating arm attached to the outer surface of the side cover and the brake operating attached to the handle It is characterized in that it is connected with a lever for wire by a wire.

[0005]

[Embodiment] 1 is a hub of a bicycle rear wheel, 2 and 3 are spoke mounting flanges of the hub, and one spoke mounting flange 2
The magnet 5 is annularly fixed to the inner peripheral surface of the boss portion 4 integrated with the boss portion, and the boss portion is screwed and fixed to the center hole 6a of the heat dissipating cap 6 which is open at one side. The center hole 8a of the brake drum 8 which is open at one side in the annular space 7 is coaxially screwed and fixed. Reference numeral 9 is a side cover that covers the space, and the wheel shaft 10 has nuts 11, 1
Fixed at 2. A stator 15 including a coil 13 and a yoke 14 and an expansion type brake shoe 16 are attached to the side cover 9, and are inserted into the annular space portion 7 and the brake drum 8, respectively. Reference numeral 17 denotes an operating arm attached to the outer surface of the side cover, which is connected to a brake operating lever (not shown) attached to the handle by a wire 19. The heat dissipation cap 6 is made of aluminum, which has a great heat dissipation effect, and a heat dissipation fin 18 is integrally formed on the outer surface thereof. Reference numeral 20 is a connection terminal.

Next, the operation will be described. When the wheel rotates, the heat dissipation cap 6 and the brake drum 8 rotate together with the hub 1, and the coil 13 fixed to the side cover 9 generates electric power. When the brake actuating lever of the handle is pulled, the brake shoe 16 operates and expands in the drum to perform the braking action. The heat generated in the brake drum 8 is transmitted to the heat radiation cap 6 and is radiated by the heat radiation fins 18.

[0007]

According to the present invention, the central portion of the heat dissipation cap, which is fixed to the inner circumference of the bicycle wheel hub, is fixed to the one end boss of the bicycle wheel hub, and the one end of the heat dissipation cap is fixed. The brake drum having an annular space part open at one side is fixed to the boss, the stator composed of the coil and the yoke and the expansion type brake shoe are mounted on the inner surface of the side cover, and the stator is installed in the annular space part. Insert the expansion type brake shoe into the brake drum to fix the side cover to the axle, and connect the brake shoe operating arm attached to the outside of the side cover and the brake operating lever attached to the handle with a wire. Therefore, the hub power generator and the expansion brake device are integrally attached to the hub boss, and the rotor is fitted with the stator. It is easy to assemble, and since the expansion type brake shoe is installed in the brake drum integrated with the rotor, it can be put together in a small space, and the brake heat generated in the brake drum can be radiated from the heat dissipation cap, reducing the power generation output. Can be prevented and the cost can be reduced.

[Brief description of drawings]

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

FIG. 2 is a left side view of FIG.

FIG. 3 is a front view of a brake shoe portion in FIG.

[Explanation of symbols]

 1 Hub 2 Spoke Mounting Flange 4 Boss 5 Magnet 6 Heat Dissipation Cap 7 Annular Space 8 Brake Drum 9 Side Cover 10 Wheel Shaft 11, 12 Nut 13 Coil 14 Yoke 15 Stator 16 Expandable Brake Shoe 18 Radiation Fin 19 Wire 20 Connection Terminal

Claims (2)

[Claims] 1. A center of a heat dissipation cap having a magnet fixed to an inner circumference of the bicycle wheel hub and having an opening on one side is fixed to a boss on one end of the bicycle wheel hub, and the inner circumference of the heat dissipation cap and a predetermined annular space are provided. The brake drum whose one side is open is fixed to the boss, and a stator composed of a coil and a yoke and an expansion type brake shoe are mounted on the inner surface of the side cover, and the stator is expanded into the annular space. A hub with a brake device for a bicycle, in which the brake shoe is inserted into the brake drum, the side cover is fixed to the axle, and the brake shoe operating arm attached to the outer surface of the side cover and the brake operating lever attached to the handle are connected by a wire. Power generator. 2. The heat dissipation cap is made of a material having a high heat dissipation effect such as aluminum and has a heat dissipation fin formed on the outer surface.
The hub power generator with the brake device for the bicycle described.