JPS63305744A - Power generating device for rotary member - Google Patents

Abstract

PURPOSE:To obtain a power generating device simplified in its structure with small resistance, by mounting a coil, in which a magnet body is slidably built, to a rotary member and reciprocating the magnet body under its own weight, and generating an electric current in the coil when the rotary member is rotated. CONSTITUTION:A cylindrical coil 2 is mounted to a rotary member 1 along its diameter. This coil 2 is formed by winding, for instance, conductors in many turns on a cylinder 2' of non-magnetic material. A magnet body 3 is slidably arranged inside this coil 2. It is preferable to block both ends of the coil 2 while providing buffer springs 4. The rotaty member 1, when it is rotated, reciprocates the magnet body 3 under its own weight in the coil 2, generates an induced current in the coil 2. In this way, a power generating device enables energy, required for power generation, to be decreased while the structure is simplified as compared with a conventional generator.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a power generation device that generates electricity by using the rotation of a rotating body such as a wheel, and in particular, a power generating device that generates electricity by using the rotation of a rotating body such as a wheel. A magnet body is arranged, and as a rotating body such as a wheel rotates, the magnet body moves inside the coil due to its own weight.
Or, it relates to a power generation device using a rotary body such as a wheel, which generates power by reciprocating it using centrifugal force.

[Prior Art and Problems to be Solved by the Invention] Generally, a bicycle is equipped with a power generating device, and this power generating device is used to light up a headlamp or an illumination sign attached to a wheel. Conventionally, this type of power generation device has a stator and a rotor housed inside a casing, and a drive element linked to the rotor provided outside the casing.
Attach this power generation device to the bicycle frame near the wheels,
By bringing the drive element into contact with the wheel, the rotor is rotated as the wheel rotates, and power is generated.

However, this type of power generation device has the disadvantage that the resistance applied to the wheels during power generation is large, which puts a heavy burden on the driver.

Furthermore, automobiles use dynamos that rotate a rotor using a drive mechanism such as a belt as the engine rotates, and generate electricity through relative rotational movement with a stator. In both of these cases, the stator is a non-rotating part;
Since power is generated through relative motion with the rotor, it is not possible to generate power when there is only one rotating body.Therefore, it is possible to directly utilize the rotation of the aluminum foil or wheel cover of the wheels of automobiles, etc., and attach the power generation device directly to the rotating part. The problem to be solved by the present invention is that the installation generates electricity.

[Means for solving problems]

Electric power is generated by a power generation device attached to a rotating part without using a non-rotating part. As the rotating body rotates, a magnetic body with a magnetic body receives changes in its own weight or the centrifugal force applied thereto, causing it to reciprocate within the coil, thereby generating an induced current in the coil. "Device",
There is also a "power generation device in which a storage battery is connected to this power generation device and the storage battery continues to generate electricity even when the rotation of the rotating body stops or even when the rotation of the rotating body stops changing."

[For production]

In the present invention, a magnet body slidably arranged on a cylindrical coil body attached to a rotating body makes a reciprocating movement due to its own weight as the rotating body rotates, and at the same time, it also makes a reciprocating movement due to changes in the centrifugal force applied thereto. I will do it. In a rotating body such as a bicycle or a car wheel, where the rotating surface of the rotating body is vertically arranged, the magnet body exerts its own weight in the vertical direction, so it moves up and down as it rotates, and the radial direction of the rotating body is proportional to the distance from the center of rotation, and

A centrifugal force proportional to the square of the rotational angular velocity acts.

Therefore, in this radial direction, reciprocating motion occurs in response to changes in rotational angular velocity.

That is, depending on where on the rotating surface of the rotating body the coil is attached, it is determined whether the force received by the magnet is due to its own weight, centrifugal force, or both forces. When the magnet moves back and forth inside the coil body, an induction proportional to the speed of movement is generated in the coil according to Lenz's law, and this current can light up the LED to create an illumination effect. This current can also be applied to a speaker to produce sound.

Moreover, this current can be stored in a storage battery, and electricity can be generated from the storage battery even when the interlocking of the magnet body is stopped. In addition, when lighting an LED, a bright and vivid illumination effect can be brought about by using a recently advanced rare earth magnet as the magnet body and using a high brightness or super high brightness LED as the LED.

〔Example〕

Embodiments to which the present invention is applied will be described in detail below. FIG. 1 is a side view of a wheel showing the first embodiment of the present invention, FIG. 2 is an electric circuit diagram of the first embodiment of the present invention, FIG. 3 is a graph showing the power generation status of the power generation device in the first to fourth embodiments of the present invention, FIG. 4 is a side view of a wheel showing the second embodiment of the present invention, and FIG. 5 is a graph showing the third embodiment. Side view of the wheel showing the 6th
The figure is an explanatory diagram of the operation in the third embodiment, FIG. 7 is a side view of the fourth embodiment, and FIG. 8 is an explanatory diagram of the operation in the fourth embodiment.

In FIG. 1, l is a wheel, and a cylindrical coil 2 is attached approximately in the diametrical direction of this wheel. This coil is constructed by winding a large number of conductive wires around two cylindrical bodies made of non-magnetic material.If an LED 9 as shown in FIG. 2(a) is directly connected to this coil, it will light up, but A load (e.g. LED
) A magnet body 3 having a predetermined mass is slidably provided inside the cylindrical coil body connected to the coil body.

Samarium-cobalt magnets and neodymium magnets, which are rare earth magnets with strong magnetism, are particularly good as magnets, and can generate large amounts of superpower. A spring 4 is attached between the magnet body 3 and both ends of the cylindrical coil body to prevent the magnet body from exceeding a predetermined displacement, causing excessive induced current to flow and damaging LEDs, etc. At the same time, it also serves as a buffer mechanism to prevent shock from being applied to the magnet. Although it is possible to directly connect an LED to both ends of the coil and light it up as shown in Figure 2 (A), it is also connected to a diode bridge circuit as shown in Figure 2 (B). is lit via the constant voltage circuit 6) (LED
etc.) connected to 10. In addition, if necessary, light 1
If the storage battery 7 is connected in parallel to the power source 0, the switch 8 can be opened to charge the storage battery when the light is not needed, and wasteful power generation can be avoided. Also, this storage battery 7
The charged voltage allows the lights to turn on even when the wheels are stopped. In this case, it is clear that when the rotational speed of the wheel is low, the magnet moves reciprocally within the coil due to the weight of the magnet as it rotates. In this case, as shown in Figure 4, multiple cylindrical coil bodies are attached to the wheel, magnets are slidably arranged inside these cylindrical coil bodies, and each coil body generates electricity. can be further enhanced.

When the rotational speed is large, the displacement due to centrifugal force is larger than the displacement due to its own weight applied to the magnet 3 in Fig. 1, so the displacement from the center is R1, the mass of the magnet is M, and the rotational angular velocity is W.
Then, the force due to its own weight is Mg (g is the acceleration of gravity), and the centrifugal force is MRW2, so MRW2>Mg, and M>
When the stone is C1, the magnet body is fixed to one wall.

There is no reciprocating movement and no induced current is generated.

FIG. 5 shows an embodiment in which a magnet body changes depending on its own weight even when the centrifugal force is large. Figure 5 11 shows the rotating body (
A leaf spring is attached to the support leg fixed to the wheel) so as to be able to slide freely around the support point 11. The fulcrum 11 is the fifth
Although the leaf spring 12 is shown mounted at the center of rotation, it does not need to be located at the center of rotation.The displacement of the leaf spring 12 is limited by a stopper 13.13/ fixed to the rotating body. Further, stoppers 13.13/ are arranged so that the plate springs 12 are attached in the radial direction. A magnet body 3 is fixed to the leaf spring 12 and arranged so as to be displaced in the circumferential direction. Further, the coil bodies 14, 14 are attached to the rotating body with the magnet body 3 as the center. When the wheel is in the position shown in FIG. 5 at a certain moment while it is rotating, the magnet body is displaced toward the stopper 13 by its own weight. At this time, since the centrifugal force is applied along the leaf spring 12 in the right direction on the paper,
The magnet body 3, which is absorbed by the leaf spring and not applied to the magnet body 3, is displaced downward in the plane of the paper only by its own weight. 6th
Figure (A) shows when the rotating body has advanced 80 degrees from the position shown in Figure 5, and as in Figure 5, the centrifugal force acts upward in the plane of the paper in the direction of the leaf spring and is absorbed by the leaf spring. In this position, the magnet body does not change due to its own weight inside the coil, so the stopper 13
．． It is located in the center of No. 13.

Figure 6 (B) is further advanced by 80 degrees than Figure 6 (A), and from the state in Figure 5 it is 180 degrees, at this time.

It can be seen that the magnet body is displaced in the direction of the stopper 13. Centrifugal force is applied to the left side of the paper along the leaf spring and is absorbed by the leaf spring. As can be seen from FIGS. 5 and 6, the magnet body is not affected by centrifugal force and reciprocates within the coil due to its own weight.

FIG. 7 shows a fourth embodiment of the present invention, in which the magnet body is located in the radial direction of the rotating body, so that when the rotating body is stationary, it is not affected by its own weight from the center of the rotating body. The springs 4/ and 4/ are located at a distance apart from each other and are moored by springs 4/ and 4/ that are compressed by the two free lengths.

Figure 7 shows the state when the rotation is stopped, and Figure 8 (
A) indicates the position displaced by centrifugal force when the rotation is accelerated and the rotation speed is constant.If the centrifugal force is sufficiently larger than the change in self-weight, when the rotation speed is constant, the self-weight from this position is The change is slight. For example, if we consider the case of a car wheel, when decelerating from 0 speed, which corresponds to 60km/h, the magnet moves toward the center of the rotating body, and when it comes to rest, as shown in Figure 7. I have already mentioned that it reaches this position. In other words, the magnetic body moves back and forth within the coil in response to increases and decreases in the number of rotations of the wheels, in other words, when the car stops and starts while waiting at a traffic light, or when it accelerates or decelerates while driving. effect can be obtained.

Figure 3 shows the changes in the superpower that correspond to changes in the position of the magnet obtained in these examples, and shows that even if there is no large difference in the amount of change in the position of the magnet due to a change in the rotation speed, the superpower is This shows that the larger the number of rotations, the larger it becomes proportionally.

〔effect〕

As described above, by using the power generation device of the present invention, it is possible to reduce the resistance applied to the wheels of a power generation device having a stator and a rotor, for example, a device that generates power as the wheels of a bicycle rotate. In addition, compared to a power generating device such as a car dynamo, the aluminum wheel or the rotating part of the wheel cover can be used to generate power, so it is easy to turn on LEDs and the like to create an illumination effect.

Furthermore, by charging the storage battery with the generated current, it is possible to light up the LED even when the rotation is stationary, and this power source can be used to configure alarm equipment (excessive speed, etc.).

Furthermore, although the embodiments have been described with respect to wheels of bicycles, automobiles, etc., they can be applied to any rotating body, and in particular, rotating bodies whose rotating surfaces are in a vertical position can be used for illumination, etc.
It is clear that similar applications to wheels can be made in various fields.

[Brief explanation of the drawing]

Fig. 1 is a side view of a wheel showing the first embodiment of the present invention;
The figure is an electric circuit diagram of the first embodiment of the present invention, FIG. 3 is a graph showing the power generation status by the power generation device in the first to fourth embodiments of the present invention, and FIG. 4 is the electric circuit diagram of the second embodiment of the present invention. FIG. 5 is a side view of a wheel showing the third embodiment of the present invention, FIG. 6 is an explanatory diagram of the operation in the third embodiment, and FIG. 7 is a side view of the fourth embodiment of the present invention. 8 are explanatory diagrams of the operation in the fourth embodiment. Negative 33 Figure jF54 Figure 6 Figure 6 Figure 7

Claims (3)

[Claims] (1) Consists of a cylindrical coil body attached to a rotating body and a magnet body having a predetermined mass that is slidably placed inside the coil body, and as the rotating body rotates, the magnet body moves back and forth within the coil due to its own weight. A power generating device for a rotating body, characterized in that it moves and generates an induced current in a coil. (2) For a rotating body, characterized in that as the rotating body rotates, a magnet body having a predetermined mass receives a change in centrifugal force and moves back and forth within the coil, thereby generating an induced current within the coil. power generation equipment. (3) The power generation device according to claims 1 and 2, which stores electricity generated by the power generation device in a storage battery so that voltage is generated even when rotation stops or there is no change in rotation. .