JP3148591U - DC power generator for bicycles - Google Patents

Abstract

A bicycle DC power generator that improves power generation efficiency and is easy to attach to a bicycle is provided. A hollow cylinder having a roller provided at one end thereof so as to be rotatable with rotation of a bicycle wheel and having an opening formed at the other end, a disk attached to the cylinder, and an outer peripheral edge of the disk. A flange projecting to the other end of the cylinder, a plurality of magnets arranged in an annular manner on the inner peripheral surface of the flange, and rotatably penetrates the inside of the cylinder and extends to the outside of the cylinder A rotary disk having a shaft and a plurality of coils that are fixed inside the cylindrical body and are annularly provided on the outer peripheral surface of the shaft with a plurality of gaps between the plurality of magnets. A stator unit, a rectifier circuit board electrically connected to the stator unit, and a socket contact that is provided to cover the opening of the cylindrical body and electrically connected to the rectifier circuit board on the outer surface thereof. When And it includes one provided has a cap, a. [Selection] Figure 2

Description

  The present invention relates to a DC power generation device for a bicycle, and in particular, generates electric power using a brushless DC motor as a power generation element, converts electric power generated via a power conversion circuit to DC electricity, and then illuminates the bicycle. The present invention relates to a bicycle DC power generator that supplies electric power.

  Conventional power generators that supply power to turn on lighting devices such as bicycle headlamps and tail lamps are attached to the hub axle of the wheel, and a hub dynamo that generates power by the rotation of the hub axle, and a roller against the side of the wheel. It is broadly classified as a roller-type power generation device that generates electric power by rotating by contact. An example of a hub dynamo is shown in FIG. The bicycle hub dynamo 8 is provided on a hub shaft 901 of a bicycle wheel 90, and includes a casing 81 with a hollow shaft hole 82 and a cover 81 covered with the casing 81 and attached to the hub shaft 901. A rotary disk 83 that rotates together with the rotary disk 83, a magnet 84 that is annularly provided on the inner peripheral surface of the rotary disk 83, a bracket-like stator 85 that is mounted in the casing 81, and a stator 85 that is provided so as to be held. And a coil 86.

  When the bicycle is run, the bicycle wheel 90 rotates around the hub axle 901, the rotary disk 83 rotates, and the magnet 84 disposed on the inner peripheral surface of the bicycle rotates relative to the coil 86. A magnetic field electromotive force is generated in the stator 85 and the coil 86 by the rotation of the magnet 84, and an induced current flows through the coil 86 to generate power.

  However, like the bicycle hub dynamo 8, the bicycle frame is arranged on one side of the hub shaft 901 inside the fork 902 on one side of the bicycle frame, so that it can be attached only to the hub shaft 901 having a sufficient length. It is not possible and lacks versatility.

  In addition, since the number of revolutions is low and the required power cannot be obtained during low-speed traveling, there are cases where the brightness is insufficient, the flashing state is not turned on, or the lighting is not turned on, and stable brightness cannot be obtained at present.

  In addition, since AC power having a voltage corresponding to the speed of the bicycle generated at both ends of the coil is low, it must be rectified to N-fold pressure and converted to DC power to be supplied to the lighting device, Installation costs may increase and the structure may be complicated.

  The present invention has been made in view of the above problems, and provides a bicycle DC power generator that can improve power generation efficiency, match power generation functions and power conversion functions, and can be easily attached to a bicycle. Objective.

  In order to achieve the above object, the present invention provides a hollow cylinder in which a roller is rotatably provided at one end with rotation of a bicycle wheel and an opening is formed at the other end, and a disk attached to the cylinder, A flange protruding from the outer peripheral edge of the disk to the other end of the cylinder, a plurality of magnets arranged in an annular manner on the inner peripheral surface of the flange, and the cylinder rotatable relative to the cylinder A rotary disk having a shaft integrally protruding from the one end side and extending to the outside of the cylindrical body, and an outer peripheral surface of the shaft fixed to the cylindrical body. A stator unit having a plurality of coils that are provided around the plurality of magnets at predetermined intervals, and a rectifier circuit that is provided inside the cylinder and is electrically connected to the stator unit. The plate and the cylinder A bicycle DC power generator is provided, characterized in that a cap is provided on the outer surface of the rectifier circuit board and has a cap provided with at least one socket contact electrically connected to the rectifier circuit board. To do.

  In the bicycle direct-current power generator, the cylindrical body is formed in a columnar shape, and the one end protrudes partially to form a sleeve portion through which the shaft penetrates, and the shaft penetrates the sleeve portion to form the sleeve. It is preferable to have an extending end extending outside the cylindrical body, and the roller is attached to the extending end.

In the bicycle DC power generator, the cap has an outer peripheral edge formed with a flange that closes the other end opening of the cylinder projecting into the cylinder,
Preferably, the stator unit has a base provided in the cylindrical body so as to be surrounded by the flange, and the rectifier circuit plate is attached to a surface of the base on the cap side.

  In the DC power generator for a bicycle, the rectifier circuit board is electrically connected to the coil and electrically connected to the three-phase full-wave rectifier circuit for outputting a DC voltage and the three-phase full-wave rectifier circuit. The three-phase full-wave rectifier circuit has two output terminals that output a DC voltage, and there are a plurality of the output capacitors, connected in parallel between the two output terminals. It is preferable.

  In the bicycle DC power generator, the three-phase full-wave rectifier circuit includes six diodes connected in series to form two parallel circuits, and the two diodes in the parallel circuit are connected in series. Preferably, the socket contact is used as an input terminal, and the socket contact is electrically connected to the output terminal of the three-phase full-wave rectifier circuit.

  According to the DC power generator for bicycles of the present invention, an element for generating power and an element for power conversion are provided in the cylinder, so that the power generation efficiency can be increased and the structure is compact, and the roller is rotated. Because it only has to be done, the freedom of attachment to the bicycle is higher than the hub dynamo.

  Embodiments of the present invention will be specifically described below with reference to the drawings.

  As shown in FIG. 1, the bicycle DC power generator 1 of the present invention rotates to generate power when the roller 12 comes into contact with the side surface of the wheel 90, and the head lamp 91 and / or the tail lamp 92 is generated. It is a roller-type power generator that lights up.

  FIG. 2 is an exploded perspective view of the bicycle DC power generator 1 of the present invention, and FIG. 3 is an assembled sectional view of the bicycle DC power generator 1 of the present invention. The bicycle DC power generator 1 has a hollow cylindrical body 10 provided on the wheel 90 side, and a roller 12 contacts the bicycle wheel 90 at one end 10a of the cylindrical body 10 and rotates with the rotation of the wheel 90. An opening 10c is formed at the other end 10b, and the opening 10c of the cylindrical body 10 is covered with a cap 50 so as to have a hollow storage portion. In this example, the rotary disk 20, the stator unit 30, and the rectifying circuit plate 40 are attached in the cylindrical body 10.

  The rotary disk 20 is annularly arranged on a disk 24 attached to the housing portion of the cylinder 10, a flange 21 protruding from the outer peripheral edge of the disk 24 toward the other end 10 b of the cylinder 10, and an inner peripheral surface of the flange 21. The magnet 22 and the disk 24 attached in this manner integrally project from the disk 24 toward the one end 10a side of the cylindrical body 10, penetrate the inside of the cylindrical body 10, and extend to the outside of the cylindrical body 10; Have In this example, the cylindrical body 10 is formed in a columnar shape, one end 10a is partially protruded and the sleeve portion 11 through which the shaft 23 passes is formed smaller in diameter than the diameter of the cylindrical body 10, and the shaft 23 is a bearing. The roller 12 is attached to the disk 24 through the sleeve 25 and has an extended end portion 23 a that extends to the outside of the cylindrical body 10 through the sleeve portion 11 and is formed with a thread groove. The roller 12 is extended by a nut 13 and a ring 14. It is attached to the end 23a. Thereby, when the roller 12 rotates with rotation of the wheel 90, the rotary disk 20 can also rotate.

  The stator unit 30 is fixed to the inside of the cylindrical body 10 and is connected to the rotary disk 20 by a connection member that is not clearly indicated by reference numerals, and a plurality of coils 32 are arranged on the outer peripheral surface of the shaft 23 between the magnet 22 and a predetermined gap. Opened and circulated. In this example, the stator unit 30 includes a base 31 provided in the cylindrical body 10 so as to be surrounded by the second flange 53. In this example, the rectifier circuit board 40 is attached to the surface of the base 31 on the cap 50 side.

  Here, since the magnet 22 serving as the rotor and the coil 32 serving as the stator are provided with a predetermined gap, it can be used as a brassless motor, the resistance of the entire load can be reduced, and the force for burning the petals It is not necessary to take out a big.

  The rectifier circuit board 40 is provided inside the cylindrical body 10 and is electrically connected to the coil 32. In this example, the rectifier circuit board 40 is provided with a plurality of electronic elements and is configured as a power conversion circuit. As shown in FIG. 5, a three-phase full-wave rectifier circuit for outputting a DC voltage is provided. 41 and an output capacitor 42 electrically connected to the three-phase full-wave rectifier circuit 41, and functions such as power conversion, rectification, and output. The three-phase full-wave rectifier circuit 41 has two output terminals that output a DC voltage, and there are a plurality of output capacitors 42 that are connected in parallel between the two output terminals.

  In this example, as shown in FIG. 5, the three-phase full-wave rectifier circuit 41 includes two diodes D1 to D6 connected in series to form three parallel circuits. A node in which two diodes in the circuit are connected in series is an input terminal 411.

  The plurality of coils 32 are power generation coils that supply an alternating voltage, and in this example, as shown in FIG. 4, a certain angular interval is set so as to perform three-phase power generation with a predetermined phase angle. It is installed at. The stator unit 30 has three conducting wires 33 drawn out, and is electrically connected to the plurality of coils 32 and the output terminal 411 of the three-phase full-wave rectifier circuit 41.

  In this example, the cap 50 is provided so as to cover the opening 10 c of the cylinder 10, and the socket contact 51 is provided on a surface portion covering the opening 10 c of the cylinder 10 so as to be electrically connected to the rectifier circuit board 40. ing. In the cap 50, a second flange 53 that closes the other end opening 10 c of the cylindrical body 10 is formed on the outer peripheral edge 52 so as to protrude into the cylindrical body 10. Although only one socket contact 51 is provided in the illustrated example, one or more socket contacts 51 may be provided depending on the design. As shown in the figure, the socket contact 51 is electrically connected to the output end of the three-phase full-wave rectifier circuit 41 by conducting wires 43, 43,. The socket contact 51 may be a socket contact that supplies power with appropriate standards, such as a socket contact connected to a different type of load, such as a universal serial bus socket, a USB port, or a plug-type contactor. In this example, as the socket contact 51, a contactor composed of two universal buses and a mother base connected in parallel is used.

  When the rotary disk 20 rotates with the rotation of the roller 12, the magnet 22 provided in the rotary disk 20 rotates. In response to the rotation of the magnet 22, an induction current is generated in the coil 32 and an AC voltage is applied. The AC voltage is converted into a DC voltage by the rectifier circuit board 40, filtered through the output capacitor 42, and output to the socket contact side. FIG. 6 shows the waveform of the DC voltage output after rectification and filtering. In the figure, the vertical axis represents voltage, the horizontal axis represents time, the broken line represents the waveform of the output voltage of each coil, and the solid line represents the DC voltage after conversion. Indicates.

  The load to which the socket contact 51 is connected is a bicycle headlamp 91 and / or tail lamp 92, and blinks via switches 93 and 94, respectively, as shown in FIG. Further, as shown in the circuit of FIG. 8, the battery can be electrically connected to a secondary battery 70 of a small electric device such as a mobile phone and can be charged.

  When the bicycle DC power generator configured as described above is attached to the side of the bicycle wheel 90 so as to be in contact with the bicycle wheel 90, when the wheel 90 rotates, the roller 12 contacts the tire of the wheel 90. Then, the shaft 23 on which the roller 12 is mounted rotates, the rotary disk 20 also rotates, and the magnet 22 provided in the rotary disk 20 rotates with respect to the stator unit 30. In response to the rotation of the magnet 22, an induction current is generated in the coil 32 and an AC voltage is applied. The AC voltage is converted into a stabilized DC voltage by the rectifier circuit board 40.

  Since the bicycle direct-current power generator of the present invention can be a known assembly member of a bicycle as a connecting member used when attached to the body frame of the bicycle, description thereof is omitted.

  As described above, according to the bicycle DC power generator of the present invention, the following effects can be obtained.

1. Since the roller 12 and the magnet 22 that are in contact with the wheel 90 and rotate with the rotation of the wheel 90 can obtain a large number of rotations of the roller 12 and the magnet 22 in one rotation of the wheel 90, the power generation efficiency is high.
2. Since the roller 12 may be attached to the vehicle body frame so as to contact the wheel 90, the degree of freedom of attachment to the bicycle is high.
3. Since the magnet 22 as the rotor and the coil 32 as the stator provided with a predetermined gap are used as the brassless motor, the resistance of the load can be reduced, and it is not necessary to generate a large force for driving the petal. You can reduce the physical strength of riding a bicycle without causing fatigue.
4). Since a power generation element composed of a magnet and a coil and a power conversion element based on a rectifier circuit are arranged in the cylindrical body 10, the power generation configuration can be made compact, the parts mounting operation is simplified, and the assembly cost is kept low. be able to.

The side view of the bicycle which adopted one embodiment of the present invention. 1 is an exploded perspective view showing a bicycle DC power generator according to an embodiment of the present invention. FIG. 3 is a partial cross-sectional view of the assembly side surface of FIG. It is a top view which shows the stator unit in the DC power generator of FIG. It is an electric circuit diagram of a rectifier circuit. It is a schematic diagram of the voltage waveform by the circuit of FIG. It is an electric circuit diagram of the illuminating device for bicycles. It is an electric circuit diagram which connects a rectifier circuit to a secondary battery. It is a longitudinal cross-sectional view which shows schematic structure of the conventional bicycle hub dynamo.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bicycle DC power generator 10 Cylindrical body 10a One end 10b The other end 10c Opening 11 Sleeve part 12 Roller 13 Nut 14 Ring 20 Rotary disk 21 Flange 22 Magnet 23 Shaft 23a Extending end part 24 Disc 25 Bearing 30 Stator unit 31 Base 32 Coil 33 , 43 Conductor 40 Rectifier circuit board 41 Three-phase full-wave rectifier circuit 411 Input terminal 42 Output capacitor 50 Cap 51 Socket contact 52 Outer peripheral edge 53 Second flange 90 Wheel 91 Head lamp 92 Tail lamp 93, 94 Switch D1-D6 Diode

Claims (5)

A hollow cylinder having a roller at one end rotatably provided with the rotation of the bicycle wheel, and an opening formed at the other end;
A disk attached to the cylindrical body, a flange protruding from the outer peripheral edge of the disk to the other end of the cylindrical body, a plurality of magnets attached in an annular arrangement on the inner peripheral surface of the flange, A rotary disk having a shaft that penetrates the inside of the cylinder so as to be rotatable with respect to the cylinder, and that protrudes to the one end side integrally with the disk and extends to the outside of the cylinder;
A stator unit having a plurality of coils fixed to the inside of the cylindrical body and provided around the outer peripheral surface of the shaft with a predetermined gap between the magnets;
A rectifier circuit board provided inside the cylindrical body and electrically connected to the stator unit;
A direct current for bicycles, characterized in that it is provided so as to cover the opening of the cylindrical body, and has a cap provided on its outer surface with at least one socket contact electrically connected to the rectifier circuit board. Power generation device. The cylindrical body is formed in a cylindrical shape, and the one end forms a sleeve portion that partially protrudes and the shaft penetrates,
The shaft has an extending end portion that extends through the sleeve portion and extends to the outside of the cylindrical body,
The bicycle DC power generator according to claim 1, wherein the roller is attached to the extending end. The cap is formed such that a second flange that closes the other end opening of the cylindrical body is protruded into the cylindrical body at an outer peripheral edge,
The stator unit has a base provided in the cylindrical body so as to be surrounded by the second flange,
The bicycle DC power generator according to claim 2, wherein the rectifier circuit board is attached to a surface of the base on the cap side. The rectifier circuit board is electrically connected to the coil and includes a three-phase full-wave rectifier circuit for outputting a DC voltage, and an output capacitor electrically connected to the three-phase full-wave rectifier circuit,
The three-phase full-wave rectifier circuit has two output terminals that output a DC voltage,
2. The bicycle DC power generator according to claim 1, wherein a plurality of the output capacitors are connected in parallel between the two output terminals. 3. In the three-phase full-wave rectifier circuit, two diodes are connected in series to form six parallel diodes.
A node in which two diodes in the parallel circuit are connected in series is an input end,
The bicycle DC power generator according to claim 4, wherein the socket contact is electrically connected to an output terminal of the three-phase full-wave rectifier circuit.

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