JP2003102154A - Generator, wheel for vehicle, wheelcover for vehicle and wheel for motor cycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a generator which is installed in a rotor, supplies electricity to an electrical machinery established in the rotor, has good generating efficiency, does not lower the generating efficiency by the rise of the rotational speed of the rotor, has a simple mechanism and hardly breaks down, to provide a wheel for vehicle and a wheel cover for a vehicle which can use electrical machineries, such as an illuminant by using the generator, a generator which can supply electricity to the electrical machinery established in the wheel, etc., of a motor cycle and a wheel for the motor bike in which the electrical machinery, such as the illuminant, can be used by using the generator. SOLUTION: The rotor 2, such as a wheel, is provided a magnet 8 which is installed coaxial and rotatable relative to the rotating shaft of the rotor 2, a weight subject 14 which is installed in the magnet 8 and has the center of gravity eccentric from the rotating shaft and a coil 10, which can fix at the position crossing in the magnetic flux of the magnet 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator for supplying electricity to electric equipment mounted on a rotating body such as a wheel, and
The present invention relates to a vehicle wheel, a vehicle wheel cover, and a motorcycle wheel having the same.

[0002]

2. Description of the Related Art As a conventional generator mounted on a rotating body such as a wheel for generating electricity to be supplied to an electric device mounted on the rotating body, there are JP-A-2000-278923 and JP-A-2000-214037. Can be mentioned. JP 2000
No. 278923 includes a rotary weight whose center of gravity is eccentric and which is attached to a rotary shaft, and the rotary weight rotates about the rotary shaft, so that the gear is attached to the rotary shaft and an intermediate wheel. Electric power is generated by rotating a rotor provided with a permanent magnet. The rotary weight is attached so that the rotary axis of the rotary weight is orthogonal to the rotary axis of the tire (first embodiment), and the rotary weight is installed so as to be parallel to the rotary axis of the tire (second embodiment). Form) is described.

Further, Japanese Patent Laid-Open No. 2000-214037 discloses
The configuration is almost the same as that of Japanese Patent Laid-Open No. 2000-278923, but it is characterized in that a rotary weight whose center of gravity is not eccentric is used. Further, the rotary shaft of the rotary weight is attached so as to be parallel to the rotary shaft of the tire.

Further, as a generator used in a two-wheeled vehicle or the like and attached to the center of a wheel, there is one that includes a shaft member and a hub rotatably provided around the shaft member. This is provided with a magnet fixed to the hub and a coil arranged at a position intersecting with the magnetic flux of the magnet and fixed to the shaft member, and generates electric power by rotating a wheel.

Further, as an example of a vehicle wheel in which design and safety are improved by attaching a light emitting body, Japanese Patent Application Laid-Open No. H6-6200
-219102 is mentioned.

[0006]

[Patent Document 1] Japanese Unexamined Patent Application Publication No.
In the generator described in No. 000-278923, as is clear from the description of the measurement result of the power generation efficiency, the power generation efficiency greatly varies depending on the rotation speed of the tire.
In the first embodiment, the vehicle speed is 30 to 50 hours.
The power generation efficiency is good when the vehicle is driven at about km, but the power generation efficiency is extremely reduced when the speed is about 10 km or 80 km per hour. Further, in the second embodiment,
Power generation efficiency is good at about 10 km / h, but 30 km / h
Above a certain level, the power generation efficiency drops significantly, and as the speed increases, the power generation efficiency worsens.

In the first embodiment, since the generator is attached so that the rotation axis of the rotary weight is orthogonal to the rotation axis of the tire, the rotary weight may be rotated or vibrated by the tire, or It is considered to rotate by resonating in the rotation cycle. Therefore, when the rotation cycle and the vibration cycle of the tire coincide with the natural vibration characteristics of the rotary weight, a high rotation speed is exhibited, but otherwise the phenomenon occurs that the tire does not rotate much. Therefore, as described above, it is considered that the phenomenon that the power generation efficiency is good only at a specific speed and that the power generation efficiency is poor at other speeds.

Further, in the second embodiment, since the rotary shaft of the rotary weight is mounted so as to be parallel to the rotary shaft of the tire, the rotary spindle having an eccentric center of gravity causes rotation of the tire due to gravity and inertia. On the contrary, it does not rotate or the number of rotations decreases. Therefore, the rotating weight is rotated relative to the generator body due to the difference in the number of rotations between the rotating body and the generator body that is fixed to the tire and rotates with the tire, and power is generated. In this method, power generation is performed efficiently when the speed is low. However, when the speed becomes higher than a certain speed, the generator is mounted off the central axis of the tire, and therefore the rotating weight is positioned on the outer peripheral side of the tire by the centrifugal force and is rotated together with the tire. It is considered that there will be almost no difference in the number of revolutions and the power generation will hardly occur.

Further, in the power generator of Japanese Patent Laid-Open No. 2000-214037, as is clear from the detailed description thereof, power is generated only when the tire is accelerated or decelerated, and is generated during constant speed operation. Not done

As described above, Japanese Patent Laid-Open No. 2000-278923.
In the generators described in Japanese Patent Laid-Open No. 2000-214037 and Japanese Patent Application Laid-Open No. 2000-214037, the power generation efficiency fluctuates depending on the traveling speed and the acceleration / deceleration, so that it is not possible to supply a constant amount of electric power to the electric equipment and the power generation efficiency is poor. Therefore, there is a problem that it is difficult to mount and use a power-consuming object such as a light emitting body on a rotating body such as a tire. In addition, since the mechanism is complicated such as having an intermediate car, there is a problem that it is easy to break down.

Further, in the generator mounted on the central portion of the wheel of the two-wheeled vehicle or the like, the coil is fixed to the shaft member that does not rotate, so that electric power is supplied to the electronic device such as the light emitter mounted on the wheel. There is a problem that it is difficult.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a generator mounted on a rotating body and supplying electricity to an electric device provided on the rotating body.
It is an object of the present invention to provide a generator that has good power generation efficiency, does not decrease in power generation efficiency due to an increase in the rotation speed of the rotating body, and has a simple mechanism that is unlikely to fail. Another object of the present invention is to provide a vehicle wheel and a vehicle wheel cover that can use an electric device such as a light emitter using the generator. Another object of the present invention is to provide a generator capable of supplying electricity to electric devices provided on the wheels of a two-wheeled vehicle. Another object of the present invention is to provide a wheel for a two-wheeled vehicle, which can use an electric device such as a light-emitting body by using the generator.

[0013]

In order to solve the above-mentioned problems, a first generator according to the present invention has the following structure. That is, in a rotating body such as a wheel, a magnet provided coaxially and relatively rotatably with respect to a rotation axis of the rotating body, and a coil fixable to the rotating body at a position intersecting with the magnetic flux of the magnet, A weight member attached to the magnet and having a center of gravity at a position eccentric from the rotation shaft. The magnet is a ring magnet. According to this, the power generation efficiency does not decrease due to the increase in the rotation speed of the rotating body,
It is possible to obtain a power generator with high power generation efficiency and a simple mechanism that is unlikely to fail.

A vehicle wheel and a vehicle wheel cover according to the present invention have the following configurations. That is, the coil of the generator according to claim 1 or 2 is fixed. In addition, a light-emitting body that is connected to the coil and emits light by generated electricity is provided. According to this, it is possible to mount an electric device, and by providing the light emitting body, it is possible to obtain a vehicle wheel and a vehicle wheel cover with improved design and safety.

The second generator according to the present invention has the following configuration. That is, in a generator equipped with a shaft member and a hub rotatably provided around the shaft member and attached to the center of a wheel, the magnet fixed to the shaft member and the magnetic flux of the magnet are crossed. And a coil fixed to the hub. According to this
It is possible to obtain a generator that can supply electricity to electric devices provided on the wheels of a motorcycle or the like.

The wheel for a motorcycle according to the present invention has the following structure. That is, the generator according to claim 7 is provided. A generator according to a seventh aspect of the present invention and a light-emitting body that is connected to the coil of the generator and emits light by generated electricity. According to this, it is possible to mount an electric device, and by providing a light-emitting body, it is possible to obtain a two-wheeled vehicle wheel with improved design and safety.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a generator, a vehicle wheel, a vehicle wheel cover, and a motorcycle wheel according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an explanatory diagram showing a vehicle tire using a vehicle wheel to which a generator, which is an example of a first generator according to the present invention, is attached. 2 is a vehicle foil according to the present invention. 2a is a spoke. Reference numeral 94 is a rubber tire attached to the vehicle wheel 2. Reference numeral 92 is a hub bolt of the vehicle, and the vehicle wheel 2 is attached to the hub bolt 92 with a nut 90. Reference numeral 4 denotes an LED as a light-emitting body, and a plurality of LEDs are radially arranged and attached to the surface of the foil. The LED 4 is connected to the generator coil 10 (not shown in FIG. 1). 6 is a weight member attached to the magnet 8 (not shown in FIG. 1).

FIG. 2 is a sectional view of the tire shown in FIG. 1 taken along the vertical center line. Reference numeral 98 is an axle, and 96 is a wheel attachment portion attached to the tip of the axle 98. The hub bolt 92 is provided so as to vertically project from the outer surface of the wheel attachment portion 96, and is used for the vehicle wheel 2
The mounting hole is passed through the hub bolt 92, and is mounted by the nut 90.

In the vehicle wheel 2, an annular space 2d is formed on the rear surface side of the spoke 2a. Reference numeral 8 is a ring magnet, which has a plurality of magnetic poles in the circumferential direction of the ring. The magnet 8 is arranged along the inner circumference of the annular space 2d. The ring magnet 8 is provided coaxially and relatively rotatable with respect to the axle 98 and the rotation axis of the vehicle wheel 2 by providing the bearing 12 on the inner peripheral side. Reference numeral 14 denotes a weight member, which is fixed to a part of the outer peripheral surface of the ring magnet 8 so that the center of gravity is eccentrically provided from the rotation axis of the axle 98 and the ring magnet 98. Reference numeral 10 is an annular coil which is arranged along the ring-shaped magnet 8 at a position intersecting with the magnetic flux of the ring-shaped magnet 8 and fixed to the vehicle wheel 2.

Reference numeral 16 is a box having a built-in electric circuit including a rectifier for rectifying the generated electricity and a limiter circuit for controlling the output voltage so as not to exceed a certain level.
Electricity generated in the annular coil 10 is input. This electric circuit is provided with a lead wire for outputting electric power, and the lead wire is wired in an annular shape along the annular space 2d so as to supply electricity to the LEDs 4 radially arranged on the outer surface of the foil. The conductor wire that is laid out in an annular shape is branched at a location where the LED 4 is arranged, and is connected to the conductor wire 18 that is connected to the LED 4 from the inside of the vehicle wheel 2.

The vehicle wheel 2 configured as described above and attached to the vehicle rotates as the axle 98 rotates. Along with that, the annular coil 10 fixed to the vehicle wheel 2 also rotates. On the other hand, the ring magnet 8 is
Since the weight member 14 provided so as to be rotatable relative to the rotation axis of the vehicle wheel 2 and having the center of gravity eccentric to the rotation axis is attached, the inertia force of the weight member 14 and the weight member 14 are attached. Due to the gravity applied to the wheel 2, even if the vehicle wheel 2 rotates, it does not rotate. Therefore, since the annular coil 10 is rotated in a state where it crosses the magnetic flux of the ring-shaped magnet 8 that does not rotate, a current is generated in the annular coil 10.

The electricity generated in the annular coil 10 is input to an electric circuit in the box 16 through a lead wire led out from the coil, rectified into a direct current by the rectifier in the electric circuit, output, and wired in the annular shape. LEDs arranged radially on the vehicle foil 2 by the conducting wire and the conducting wire 18.
4 is supplied. At this time, when the voltage of electricity supplied from the annular coil 10 to the electric circuit 16 is too high, the limiter circuit operates to prevent the other electric circuits and the LED 4 from being broken.

Next, another embodiment of the first generator,
An embodiment of a vehicle wheel cover to which the wheel cover is attached will be described. Reference numeral 30 in FIG. 3 denotes a vehicle wheel cover according to the present invention. The vehicle wheel cover 30 is mounted on the hub bolt 92 of the wheel mounting portion 96 of the vehicle on the outside of the vehicle wheel 88 fixed by the nut 90.
It is attached at 0a.

Reference numeral 32 denotes a generator, which has a cylindrical housing 34, and a central portion of the inner wall of the vehicle wheel cover 30 so that the central axis of the cylindrical housing 34 coincides with the axis of the axle 98. Attached to. An annular coil 36 is attached inside the housing 34 along the inner circumference of the cylinder. 38 is
The magnet is formed in a cylindrical shape, has a plurality of magnetic poles along its circumference, and is arranged so that the magnetic flux intersects the annular coil 34. The magnet 38 has a shaft 4 fixed to its central axis.
Both ends of 0 are rotatably supported by the housing 34. That is, it is supported coaxially with the axle 98 so as to be relatively rotatable.
42 is a bearing for rotating the shaft 40 smoothly. The shaft 40 is formed with an extending arm 44 that is bent and extends at a right angle outside the housing, and a weight member 46 is attached to the tip of the extending arm 44. As a result, the weight member 46 is attached with its center of gravity eccentric from the axle 98 and the shaft 40.

Reference numeral 48 denotes a box which is arranged beside the housing 34 and which houses an electric circuit connected to the conductor of the annular coil 36. The content of the electric circuit is the box 16 of the vehicle wheel 2 described above. It is almost the same as the internal electric circuit, and has circuits such as a rectifier and a limiter inside. Moreover, the terminal for electric output of this electric circuit is connected to the conducting wire 52 connected to the LED 50 provided on the surface of the vehicle wheel cover 30 through the conducting wire.

The vehicle wheel cover 30 constructed as described above rotates together with the vehicle wheel 88. When the vehicle wheel cover 30 rotates, the generator 3
2 rotates, and the annular coil 36 fixed to the housing 34 also rotates. On the other hand, the magnet 38 does not rotate due to the inertial force of the weight member 46 and the gravity. Therefore, the annular coil 36 is rotated while intersecting with the magnetic flux of the non-rotating magnet 38, a current is generated in the annular coil 36, and the LED 50 is turned on.

As described above, the weight members 14 and 46 are attached to the magnets 8 and 38 which are coaxially and relatively rotatable with the rotation shaft of the rotating body (vehicle wheel 2, vehicle wheel cover 30). Therefore, even if the rotation speed of the rotating body is increased, the rotating body does not move to the outer peripheral side of the rotating body due to the centrifugal force of the rotating body. Further, the weight members 14 and 46 are rotated by a frictional force between the rotating body and the bearings 12 and 42, but do not rotate by adjusting the performance of the bearing 12 and the weights of the weight members 14 and 46. Can be adjusted as follows. Therefore, it is possible to obtain a generator with high power generation efficiency in which the amount of power generation increases as the rotation speed of the rotating body increases. Further, since it has a simple mechanism, it has advantages that it can be manufactured at low cost and there are few failures.

Next, an embodiment of the second generator mounted on the wheels and the two-wheeled wheel will be described. 60 of FIG.
Is a wheel for a motorcycle according to the present invention. 60a is a rim, and 60b is a spoke. 62 is a generator provided with a hub and a shaft member, and by passing the spokes 60b through the spoke attachment holes 64c provided in the hub 64,
It is fixed to the center of the wheel 60 for a motorcycle. 68
Is a shaft member serving as a rotating shaft. 74 is a nut,
Used when attaching a wheel for a motorcycle to a motorcycle such as a bicycle. Reference numeral 70 denotes an LED as a light emitting body, which is attached to the spoke 60b, is connected to the coil of the generator 62 by a conductive wire, and emits light by electricity generated by the generator 62.

FIG. 5 is an enlarged explanatory view of the generator 62. 6
A hub 4 is composed of a cylindrical member 64a and disk-shaped members 64b formed at both ends thereof. 68 is a shaft member, and the hub 64 is rotatably provided with respect to the shaft member 68. When the wheel 60 for a motorcycle is attached to the motorcycle body, the small-diameter portion 68b of the rotary shaft 68 is fitted into the notch of the fork of the motorcycle, and the nut 74 is attached.
Is screwed into the rotary shaft 68, and the fork is sandwiched between the nut 74 and the large diameter portion 68a of the rotary shaft. With the above configuration, the generator 62 functions as a hub and a rotating shaft of wheels of the motorcycle.

Reference numeral 66 is a box in which an electric circuit is incorporated inside, which is attached to a part of the outer periphery of the hub 64. Box 6
Like the boxes 16 and 48, a rectifier, a limiter and the like are incorporated in the inside of the box 6. Reference numeral 71 is a positive-pole and negative-pole conductor that outputs the generated electricity. The conducting wire 71 is connected to the LED 70 of FIG. 4 and causes the LED 70 to emit light when power is generated.

FIG. 6 is a cross-sectional explanatory view of the generator 62 taken along a plane parallel to the axis of the cylindrical member 64b.
In this embodiment, the inside of the generator main body 62 is divided into two by the magnetic flux shielding plate 64d. Figure 6
Inside, it is arranged on the right side across the magnetic flux shielding plate 64d,
It has the structure of a conventional hub-integrated generator, and the left side is the structure of the generator according to the present invention.

First, the structure of the generator on the left side according to the present invention will be described. 78 is a magnet fixed to the outer periphery of the shaft member 68 and having a plurality of magnetic poles in the circumferential direction. 76
Is an annular coil fixed along the inner circumference of the cylindrical member 64b and arranged at a position intersecting with the magnetic flux of the magnet 78. The terminal 76a of the annular coil is connected to the electric circuit incorporated inside the box 66. The shaft member 68 has its contact point supported by a bearing 80, and is provided so as to rotate smoothly.

In the generator 62 configured as described above, the shaft member 68 is fixed to the fork of the two-wheeled vehicle, and the hub 64 is fixed to the wheels by the spokes. The hub 64 will rotate around 68. Therefore, the annular coil 76 rotates around the periphery of the magnetic flux of the magnet 78 fixed to the rotating shaft 68, and a current is generated in the annular coil 76. The generated electricity is rectified by the rectification circuit in the box 66 and output to the lead wire 71,
The LED 70 is caused to emit light.

On the other hand, in FIG. 6, a power generation structure located on the right side of the magnetic flux shielding plate 64d will be briefly described. In this power generation structure, the coil 84 is attached to the shaft member 68 side and the magnet 82 is provided to the hub 64 side. The generated electricity is output by the conductors 86 and 72. Lead wire 86
Is connected to a shaft member 68 made of a conductor. Since the shaft member 68 is connected to the fork of the two-wheeled vehicle, the two-wheeled vehicle side can be used by connecting to the electric device fixed to the two-wheeled vehicle main body, for example, a headlight, by using the fork and the lead wire 72. In addition, when using only for the purpose of supplying electricity to the electric device on the wheel, it is not necessary to adopt the power generation structure located on the right side with the magnetic flux shielding plate 64d interposed therebetween.

The vehicle wheel, the vehicle wheel cover, and the two-wheeled vehicle configured as described above can have a unique design by having a light emitting body. Various colors of LEDs can be selected, and various designs can be obtained by devising the arrangement of the LEDs. Further, at night, a pedestrian can visually recognize the positions of the wheels of the automobile, or can easily see the two-wheeled vehicle, so that the safety is improved. Further, the light emitting body is not limited to the LED, and electroluminescence or the like can be used. Also,
Since the power generator according to the present invention has a large amount of power generation, it is possible to provide not only the light emitting body but also various electric devices on the rotating body. If it is necessary to use an electric device such as a light emitter even when the wheels are stopped, this can be realized by mounting a condenser on the electric circuit.

[0036]

According to the generator of the present invention, electricity can be provided to electric equipment provided on a rotating body such as a vehicle wheel, a wheel cover, a two-wheeled vehicle wheel, and the like.
There is an effect that the power generation efficiency does not decrease due to the increase in the rotation speed of the rotating body, the power generation efficiency is good, and a simple mechanism does not easily cause a failure. Further, according to the vehicle wheel, the vehicle wheel cover, and the two-wheeled vehicle wheel according to the present invention, it is possible to provide an electric device, and particularly when a light emitting body is provided, it is excellent in designability and safety. There is an effect that there is.

[Brief description of drawings]

FIG. 1 is a diagram showing a vehicle tire using a vehicle wheel according to the present invention.

FIG. 2 is an explanatory cross-sectional view of a vehicle tire using the vehicle wheel according to the present invention.

FIG. 3 is an explanatory sectional view showing a generator and a wheel cover for a vehicle according to the present invention.

FIG. 4 is a view showing a wheel for a motorcycle according to the present invention.

FIG. 5 shows a generator mounted on wheels according to the present invention.

FIG. 6 is an explanatory sectional view of a generator attached to a wheel according to the present invention.

[Explanation of symbols]

2 Vehicle wheel 4 LED 6 Weight member 8 ring magnet 10 annular coil 12 bearings 14 Weight member 16, 48, 66 Box containing electronic circuits 18, 52, 71 lead wire 30 Vehicle wheel cover 32 generator 34 Generator housing 36 annular coil 38 magnets 40 axes 42 bearing 44 extended arm 46 Weight member 50 LED 60 motorcycle wheel 60a rim 60b spokes 62 generator 64 hub 68 Shaft member 70 LED 72 leads 74 nuts 76 annular coil 76a lead wire 78 Magnet 80 bearings 98 axles

Claims (9)

[Claims] 1. A magnet provided on a rotating body such as a wheel so as to be coaxial and rotatable relative to a rotating shaft of the rotating body, and a magnet attached to the magnet and having a center of gravity at a position eccentric from the rotating shaft. A generator comprising: a weight member; and a coil that can be fixed to the rotating body at a position intersecting with the magnetic flux of the magnet. 2. The generator according to claim 1, wherein the magnet is a ring magnet. 3. A vehicle wheel, wherein the coil of the generator according to claim 1 or 2 is fixed. 4. The vehicle wheel according to claim 3, further comprising a light-emitting body which is connected to the coil and emits light by generated electricity. 5. A wheel cover for a vehicle, wherein the coil of the generator according to claim 1 or 2 is fixed. 6. The vehicle wheel cover according to claim 5, further comprising a light-emitting body which is connected to the coil and emits light by generated electricity. 7. A generator having a shaft member and a hub rotatably provided around the shaft member, the magnet being fixed to the shaft member, and the magnet fixed to the shaft member. A generator provided with a coil fixed to the hub at a position intersecting with the magnetic flux. 8. A wheel for a motorcycle, comprising the generator according to claim 7. 9. A wheel for a two-wheeled vehicle, comprising: the generator according to claim 7; and a light emitter connected to the coil of the generator to emit light by generated electricity.