JPH0349112Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a bicycle power generation device that is attached to a bicycle wheel axle.

(Prior Art) As shown in FIG.
A bicycle power generator has been devised in which the generator is fixed to the flange 23a of the frame 25 with bolts 24, and the inner surface of the base part of the frame 25 is pressed to form a recess 25a so that the outer surface of the stator 20 does not come into contact with it.

(Problem that the invention aims to solve) By the way, in the above conventional technology, when the rotor is made of synthetic resin, when the natural frequency of the rotor matches the timing of cutting the magnetic lines of force of the multi-pole magnet with the coil, it resonates and generates sound. Also, if there is an external collision such as when the bicycle falls over, the rotor tends to come off from the small flange hub, and even though it is installed between a frame and spokes of a certain size, the width between the stator and rotor outer surface is somewhat wider than that. However, since it is necessary to press the inner surface of the frame to form a recess, it cannot be attached to an off-the-shelf bicycle as is, and the cost of processing the frame increases, and furthermore, it cannot be attached to a small flange hub with a small flange. There was a problem.

(Means for Solving the Problems) The present invention aims to solve the above problems, and provides a bicycle power generator in which the stator is fixed to the wheel axle and the rotor is fixed to the small flange. Fit the center boss of the rotor into the center hole of the end face bearing on one side of the small flange hub, which is rotatably attached to the wheel axle, fit the horizontal groove of the mounting plate into the small flange hub, and then attach the mounting plate to the bearing. The rotor and the mounting plate are clamped and fixed to the small flange hub with bolts, the rotor is attached along the outer surface of the spoke, and at least a part of the rotor is in contact with the spoke. It is something.

The illustrated embodiment will be described in detail below. 1 is a wheel axle fixed to a frame 2 with a nut 3, 4 is a small flange hub rotatably attached to the wheel axle 1, and spokes 6 are fixed to small flanges 5 at both ends. 7 is the rotor of the generator, and the center boss part 8 is fitted into the center hole 10 of the bearing part 9 of the small flange hub 4, and the horizontal groove 12 of the mounting plate 11 is fitted into the small flange hub 4, and the outer surface of the bearing part 9 is fitted. The rotor 7 and the mounting plate 11 are clamped and fixed to the small flange hub 4 with bolts 13, and the inner surface of the rotor 7 is inclined along the outer surface of the spokes 6, so that at least a part of the rotor 7 is in contact with the spokes 6. It is attached to. 14
is fixed to the wheel shaft 1 by the stator of the generator, and the coil 15 of the stator 14 is inclined in the same way as the rotor 7, and is arranged opposite to the inner circumferential surface of the multipolar magnet 16 fixed to the outer circumferential inner surface of the rotor 7 with a small gap. It has been done. 17 is the coil 1 attached to the stator 14
Terminal 5.

Next, the effect will be explained. When the wheel rotates, the rotor 7 rotates together with the spokes 6 and the small flange hub 4, and current is generated in the coil 15. Even if the rotor 7 vibrates due to resonance during rotation, the spokes 6 absorb the vibration and do not generate sound. Furthermore, even if an external force is applied to the generator, the spokes 6 absorb that force, so it is difficult to come off, and since the rotor 7 and stator 14 are both inclined along the spokes 6, the space between the frame 2 and the spokes 6 can be used effectively. The generator can be attached to the ready-made bicycle frame 2 without any modification, and it can also be firmly attached to a small flange hub having a small flange.

(Effect) According to this invention, the stator is fixed to the wheel shaft,
In a bicycle power generation device in which the rotor is fixed to a small flange, the center boss portion of the rotor is fitted into the center hole of the end face bearing on one side of the small flange hub rotatably attached to the wheel shaft,
Fit the horizontal groove of the mounting plate into the small flange hub, bring the mounting plate into contact with the convex outer surface of the bearing, clamp and fix the rotor and mounting plate to the small flange hub with bolts, and fit the rotor along the outer surface of the spoke. At least a portion of the spokes are in contact with the spokes, so even if the rotor resonates, the spokes will absorb the vibrations and no sound will be generated, and even if an external force is applied to the generator, the spokes will absorb that force. Since it is held in place, it is difficult to come off, and since the generator is placed along the spokes, the space between the frame and spokes can be used effectively, and it can be attached to an existing bicycle as is, and it is also firmly attached to a small flange hub with a small flange. This has the practical effect of being able to be attached to.

[Brief explanation of the drawing]

Fig. 1 is a front view of the main parts of an embodiment of the present invention, Fig. 2 is a left side view of Fig. 1, Fig. 3 is a front view of the mounting plate of Fig. 1, and Fig. 4 is a right side view of Fig. 4. 5 is a front view of the conventional device, and FIG. 6 is a left side view of FIG. 5. 1...Wheel axle, 2...Frame, 4...Small flange hub, 5...Small flange, 6...
...Spoke, 7...Rotor, 8...Rotor center boss, 9...Bearing, 10...Bearing center hole, 11...Mounting plate, 12...Horizontal groove of mounting plate, 13...Bolt , 14... stator.

Claims (1)

[Scope of utility model registration request] In a bicycle power generation device in which the stator is fixed to the wheel axle and the rotor is fixed to the small flange, the center of the rotor is inserted into the center hole of the end face bearing on one side of the small flange hub, which is rotatably attached to the wheel axle. Fit the boss part, fit the horizontal groove of the mounting plate into the small flange hub, bring the mounting plate into contact with the convex outer surface of the bearing part, clamp and fix the rotor and mounting plate to the small flange hub with bolts, A bicycle power generating device characterized in that the rotor is attached along the outer surface of the spoke, and at least a part of the rotor is brought into contact with the spoke.