JP2587754Y2 - Mounting structure for bicycle power generator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a bicycle for which a hub is rotatably fitted to a wheel fixing shaft, a spoke hooking flange is formed at one end of the hub, and a generator rotor is integrally fixed to the hub. The present invention relates to a mounting structure for a power generator.

[0002]

2. Description of the Related Art The present applicant has previously devised a bicycle power generator as disclosed in Japanese Utility Model Publication No. 1-23900.

This will be described in detail with reference to FIG. Reference numeral 21 denotes a front wheel shaft fixed to a fork 22, and a hub 24 connecting left and right spoke hooking flanges 23 is rotatably fitted therein. The circular recess 23a formed at the center of each spoke hooking flange 23 is machined with high precision so as to match the outer diameter of the bearing 25, and the bearing 25 is fitted and fixed respectively. In the upper part of the bearing 25, a circular gap 23a 'for fitting the oil sealing is formed. The circular gap 23a 'above the bearing 25 is the oil sealing 2
6 is fitted, but the circular gap 23 on the left
a 'is fitted with an annular boss 27a projecting outward from the center of the side of the rotor 27 whose outer surface is opened without fitting the oil sealing, and the rotor 27 is rotated by three screws 28.
The side portion and the spoke hooking flange 23 are integrally screwed and fixed. 29 is a ball pressing member of the bearing. Rotor 2
An annular magnet 30 is fixed to the inner peripheral surface of the ring 7. Reference numeral 31 denotes an annular plate fixed to the front wheel shaft 21, and a coil 32 is fixed to the outer peripheral surface of the annular plate so as to face the annular magnet 30. Reference numeral 33 denotes a cover plate having an opening of the rotor 27, which is fixed integrally with the front wheel shaft 21.

Next, the operation will be described. Bearing 2
5 of rotation center and circular gap 23 of spoke hanging flange 23
a ′ is concentric with the inner surface,
The rotor 27 fitted and fixed to a ′ is concentric with the center of rotation of the bearing 25, and the annular magnet 30 of the rotor 27 that rotates integrally with the wheel forms a coil 32 integral with the front wheel shaft 21 fixed to the fork 22. The coil 32 rotates without eccentricity and generates electric power in the coil 32.

[0005]

In the above-mentioned prior art, the bearing and the rotor can be made coaxial because the oil sealing of the bearing is removed and the rotor of the generator is fitted to this part. Since there is little oil in the bearing, there is a problem that the bearing is burned and the usable period is shortened.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above problem by making the outer periphery of a spoke hook flange formed at the end of a hub rotatably mounted on a wheel fixed shaft the same as the hub core.
A plurality of protrusions machined to the core and fitted to the outer periphery are annularly projected on the outer surface of the rotor of the generator, and the protrusions are fitted to the outer periphery of the spoke hooking flange , and S
The spoke flange is concentric, the radial groove of the mounting plate is inserted into the intermediate cylindrical part of the hub, and the mounting plate abuts against the inner surface of the spoke flange, and the screw attached to the rotor projects from between the spokes. Then, the rotor is fixed to the outer surface of the mounting plate, and the rotor is fastened and fixed to the spoke hooking flange.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific description will be given based on the illustrated embodiment. Reference numeral 1 denotes a wheel shaft fixed to a fork 2 and a hub 3 is fitted therein. Spoke-hanging flanges 3a are formed at both ends of the hub 3, and an annular boss 3b protrudes outside the spoke-hanging flange 3a, and a bearing 4 is provided inside. The outer periphery of the spoked flange 3a is precision machined to the same center as the core of the hub 3. Reference numeral 5 denotes a rotor of the generator A. Three protrusions 5a are fitted on the outer surface of the generator A to fit on the outer periphery of the spoke hooking flange 3a, and the protrusions 5a are fitted on the outer periphery of the spoke hooking flange 3a. Precision processing
You. Reference numeral 6 denotes a mounting plate which radially inserts a groove 6a in the radial direction into the cylindrical portion of the hub 3, makes the outer diameter larger than the outer circumference of the spoke hooking flange 3a, and abuts the mounting plate 6 on the inner surface of the spoke.

A hole 5b is formed in the rotor 5 at a position outside the projection 5a, and a screw 7 is inserted through the hole 5b.
A screw hole 6b is formed at a position facing the above, and the screw 7 is projected from a gap between the spokes, screwed into the screw hole 6b of the mounting plate 6, and the rotor 5 is fastened and fixed to the spoke. 8 is a stator of the generator A fixed to the rear wheel shaft 1, 9 is a coil, 1
Reference numeral 0 denotes an annular magnet fixed to the inner surface of the rotor 5, and a coil 9
And rotate through a small gap.

Next, the operation will be described. The rotor 5 is concentric with the precision flanged spoke hook 3a, rotates integrally with the wheel, and the annular magnet 10 on the inner surface of the rotor 5 rotates without eccentricity with respect to the coil 9 of the stator 8 to rotate the coil. 9 to generate electricity.

[0010]

[Effect of the invention The present invention is an outer periphery of the spoke hooking flange formed on the hub end mounted rotatably to the wheel fixed shaft
Processed to be processed into the core coaxial with the hub is fitted to the outer periphery
A plurality of projections are provided annularly on the rotor outer surface of the generator, and the projections are fitted to the outer periphery of the spoke hooking flange ,
The rotor and the spoke hooking flange are concentric, the radial groove of the mounting plate is inserted into the intermediate cylindrical portion of the hub, the mounting plate abuts against the inner surface of the spoke hooking flange, and the screw attached to the rotor is inserted between the spokes. It is more protruded and fixed to the outer surface of the mounting plate, and the rotor is fastened and fixed to the flange on the hook, so no special precision processing is required, the rotor of the hub and the generator can be fixed concentrically, and the rotational runout is reduced. Since there is no gap, the gap between the coil of the generator and the annular magnet can be made extremely small and accurate, and the power generation performance can be improved.

[Brief description of the drawings]

FIG. 1 is a cutaway front view of an essential part of one embodiment of the present invention.

FIG. 2 is a side view of the rotor of FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a side view of the mounting plate of FIG. 1;

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

FIG. 6 is a fragmentary front view of a conventional device.

[Explanation of symbols]

 A Generator 1 Rear wheel axle 2 Fork 3 Hub 3a Spoke hook flange 4 Bearing 5 Rotor 5a Rotor protrusion 5b Rotor hole 6 Mounting plate 6a Mounting plate slot 6b Mounting plate screw hole 7 Screw 8 Stator 9 Coil 10 Annular magnet

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B62J 6/12

Claims (1)

(57) [Scope of request for utility model registration] 1. An outer periphery of a spoke hooking flange formed at an end of a hub rotatably mounted on a wheel fixed shaft and a hub core.
A plurality of projections machined concentrically and machined to fit on the outer periphery are annularly protruded on the outer surface of the rotor of the generator, and the projections are fitted on the outer periphery of the spoked flange , and When
The spoke mounting flange is concentric, the radial groove of the mounting plate is inserted into the intermediate cylindrical part of the hub, the mounting plate abuts on the inner surface of the spoke mounting flange, and the screw attached to the rotor projects from between the spokes. Then, it is fixed to the outer surface of the mounting plate and the rotor is fastened and fixed to the spoke hooked flange.