JPH09240559A - Driving device for wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device for wheels, capable of automatically rotating wheels of a rear car by magnetic force. SOLUTION: Many permanent magnets 1 are attached to a wheel 2 with desired distances while alternately changing the directions of polarities, an electromagnet 4 for applying torque to the wheel by repellent to the permanent magnets is provided, the direction of electric current flow to the electromagnet is switched by a controller 5, and the polarity of the electromagnet is switched. A control unit is constituted of a synchronous switch 7 to be turned on and off in synchronism with the approach or separation of the permanent magentas to the electromagnet, and a selector switch 8 for switching the direction of electric current to flow to the electromagnet with the turning on and off of the synchronous switch 7. The synchronous switch is constituted of a rotational body 11 in which conductive parts 9 and non-conductive parts 10 are alternately arranged, and rotated in synchronism with the wheel, and a contact 12 to be brought in alternate contact with the conductive parts and the non conductive parts, and two or more electromagnets are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel drive device for rotating wheels of a bicycle, a rear car, a motorcycle, etc. by utilizing repulsive force of an electromagnet.

[0002]

2. Description of the Related Art In a conventional bicycle, when a pedal is depressed, the wheels rotate and move forward. Recently, there are electric bicycles that are driven by a motor when the pedal is depressed. This electric bicycle has one or two transmissions to adjust the rotation speed of the motor to the practical speed of the wheels.
I am using the ke to slow down.

[0003]

Since an ordinary bicycle does not advance unless the pedal is depressed, there are cases in which the bicycle is tired or unable to finish climbing when it is steeply climbing uphill. Moreover, even if the mileage is long, it may be tired. In the case of a trolley or a rickshaw, if the luggage to be carried is heavy, it requires a large amount of force to pull it, which makes it tired. Since the electric bicycle requires a motor and a transmission, the bicycle is large and expensive.

An object of the present invention is to provide a wheel drive device capable of automatically rotating wheels of a bicycle, a rear car, etc. by magnetic force.

[0005]

According to a first aspect of the present invention, there is provided a wheel driving device as set forth in FIG. 1, in which a large number of permanent magnets 1 are arranged in the circumferential direction of a wheel 2 and are of alternating polarity. The magnet-equipped wheel 3 mounted in a different direction, the electromagnet 4 which gives a rotational force to the wheel 2 by the repulsive force of the permanent magnet 1, and the permanent magnet 1 approaching or leaving the electromagnet 4 as the wheel 2 rotates. Controller 5 for switching the direction of the current flowing to the electromagnet 4 each time
And a battery 6 for supplying power to the electromagnet 4.

According to a second aspect of the present invention, as shown in FIG. 1, the controller 5 synchronizes with the control unit 5 each time the permanent magnet 1 approaches or departs from the electromagnet 4 by the rotation of the wheel 2. Synchronous switch 7 that turns on and off, and synchronous switch 7
And a switching switch 8 for switching the polarity of the electromagnet 4 by switching the direction of the current flowing through the electromagnet 4 according to the ON / OFF state of the electromagnet 4.

According to a third aspect of the present invention, as shown in FIG. 2, in the wheel drive device, the synchronous switch 7 is provided with conductive portions 9 and non-conductive portions 10 alternately on the circumference and is synchronized with the wheel 2. The rotating body 11 is rotatable and the contactor 12 comes into contact with the conductive portion 9 and the non-conductive portion 10 alternately by the rotation of the rotating body 11.

According to a fourth aspect of the present invention, the wheel driving device is provided with two or more electromagnets 4 in the circumferential direction of the wheel 2 as shown in FIG.

[0009]

[First Embodiment of the Invention] A first drive device for a wheel according to the present invention.
The embodiment will be described with reference to FIG. For convenience of explanation, the wheel 2 shown in FIG. 1 is a bicycle wheel (rear wheel).
In the drive device of FIG. 1, a large number of permanent magnets 1 are attached to a wheel 2 at intervals in the circumferential direction of the wheel 2, and an electromagnet 4 (4a, 4a, which gives a rotational force to the wheel 2 by the repulsive force of the permanent magnet 1).
4b), and the permanent magnet 1 becomes the electromagnet 4 as the wheel 2 rotates.
A control unit 5 (FIG. 3) that switches the direction of the current flowing to the electromagnet 4 each time the vehicle approaches or departs from, and a battery 6 (FIG. 3) that supplies power to the electromagnet 5.

The wheel 2 has a tire 14 with a built-in tube mounted on the outer side of a rim 13, and a disk 15 made of aluminum, resin or the like on the inner side of the rim 13 instead of the spokes. In the present invention, the disc-shaped permanent magnets 1 are attached at equal intervals in the circumferential direction of the disc 15 of the wheel 2 to form the magnet-equipped wheel 3. As shown in FIG. 3, the permanent magnet 1 has N and S magnetic poles in the thickness direction (left and right direction in FIG. 3), and the polarities (N, S) are every other as shown in FIG. Are attached to the wheel 2 so that they are alternately reversed.

The magnet-equipped wheel 3 shown in FIG. 1 is mounted on a rotary shaft 18 together with a control unit 5, a brake plate 16 and a gear 17. The rotating shaft 18 is horizontally rotatably attached to the lower end portion of a vertically downward U-shaped frame 19 of the bicycle, whereby the wheel 3 with magnets, the control unit 5, and the brake plate 1 are provided.
6. The gear 17 is attached to the frame 19 so as to be rotatable together with the rotating shaft 18. The brake plate 16 is for braking the rotation of the wheels 2, and
7 is for chaining, and is the same as the conventional one. In the present invention, since the wheel 2 can be rotated only by magnetic force, the gear 17 is not necessary in some cases.

The electromagnets 4 are mounted on both sides of the wheel 2 so as to face the inner upper portion of the frame 19 with the wheel 2 interposed therebetween.

The control unit 5 outputs to the electromagnet 4 a synchronization switch 7 which outputs a synchronization signal each time the permanent magnet 1 approaches or leaves the electromagnet 4 as the wheel 2 rotates, and a synchronization signal from the synchronization switch 7 causes the electromagnet 4 to flow. It is composed of a changeover switch 8 for changing the direction of current and changing the polarity of the electromagnet 4. As the synchronous switch 7, for example, what is usually called a comma is suitable. The commutator includes a rotating body 11 in which conductive portions 9 and non-conductive portions 10 are alternately arranged at equal intervals in the circumferential direction of the disk,
Contact 1 for alternately contacting the conductive portion 9 and the non-conductive portion 10
And 2. As shown in FIG. 2, the distance between the conductive portion 9 and the non-conductive portion 10 of the rotating body 11 is set to be the same as the distance between the permanent magnets 1 attached to the wheels 2 so that they rotate in synchronization with the permanent magnets 1. is there.

The rotating body 11 is mounted on a rotating shaft 18 so as to rotate therewith, and the contacts 12 are attached to the frame 1.
9 is always in contact with the rotating body 11, and when the rotating body 11 rotates together with the rotating shaft 18, the contactor 12 alternately contacts the conductive portion 9 and the non-conductive portion 10 of the rotating body 11, Conductive (ON) when contacting the conductive portion 9, non-conductive portion 10
It becomes non-conducting (OFF) when it comes into contact with.

As the changeover switch 8, as shown in FIG. 3, a relay having two movable contacts c and f is used. This is ON, OF of the synchronous switch (commi in the figure) 7
The polarity of the electromagnet 4 is switched by switching the direction of the current flowing through the electromagnet 4 by F. In FIG. 1, the changeover switch (relay) 8 is attached to the inner surface of the frame 19.

The battery 6, the synchronous switch 7, the changeover switch 8 and the electromagnet 4 are wired as shown in FIG. That is, the positive pole of the battery 6 → the changeover switch 8 → the left electromagnet 4a of the permanent magnet 1 among the two electromagnets 4 (4a, 4b) → the right electromagnet 4b → the changeover switch 8 → the negative pole of the battery 6. Further, the synchronous switch 7 and the exciting coil 8a of the changeover switch 8 are connected in parallel with the battery 6.

[0017]

Description of Operation of the Invention The operation of the wheel drive device of the present invention will be described with reference to FIG. . The changeover switch (relay) 8 is movable when the synchronous switch (communication) 7 is OFF (the non-conducting portion 11 of the communication 7 and the contact 12 are in contact) with the movable contact c contacting the fixed contact a. The contact f is in contact with the fixed contact e. At this time, the positive pole of the battery 6 → the movable contact c of the relay 8 → the exciting coil of the left electromagnet 4a → the right electromagnet 4
Exciting coil b → moving contact f of relay 8 → battery 6
A negative pole closed circuit is formed and a current flows through the closed circuit.
As a result, the electromagnets 4a and 4b are excited, and the left electromagnet 4a of the permanent magnet 1 has the S pole on the left side and the N pole on the right side. The left side of the electromagnet 4 on the right side of the permanent magnet 1 has the S pole and the right side has the N pole. . Therefore, the electromagnets 4a and 4b and the permanent magnet 1 have the same polarity and repel each other, and the wheel 2 rotates forward or backward. At this time, if the wheel 2 is artificially rotated forward, the wheel 2 rotates forward.

.. With the rotation of the wheels 2, the synchronous switch 7 also rotates in the same direction (the direction of the arrow in FIG. 3). At this time, when the conducting portion 10 of the synchronous switch 7 comes into contact with the contact 12 (is turned on), a closed circuit of the + pole of the battery 6 → the synchronous switch 7 → excitation coil 8a → the negative pole of the battery 6 is formed. Current flows through the closed circuit. Therefore relay 8
Movable contacts c and f are fixed contacts b and d, respectively, as indicated by chain lines.
Switch to the side. Thereby, the + pole of the battery 6 → the movable contact c of the relay 8 → the exciting coil of the right electromagnet 4b → the exciting coil of the left electromagnet 4a → the movable contact f of the relay 8 → the closed circuit of the negative pole of the battery 6, Current flows through the closed circuit. Therefore, the electromagnets 4a, 4 on both sides of the permanent magnet 1 are
b is excited, the left side of the left electromagnet 4a is the N pole, the right side is the S pole, the left side of the right electromagnet 4b is the N pole, and the right side is the S pole. Therefore, the electromagnets 4a and 4b and the permanent magnet 1 have the same polarity and repel each other, and the wheel 2 is given a forward rotational force.

[0019] When the synchronous switch 7 further rotates in the same direction as the wheel 2 rotates, and the next non-conducting portion 11 of the synchronous switch 7 comes into contact with the contact 12 (is turned off),
Since no current flows through the synchronous switch 7, the movable contacts c and f of the changeover switch 8 are switched (returned) to the fixed contacts a and e, respectively, as shown by the solid lines. Therefore, the + pole of the battery 6 → the movable contact c of the changeover switch 8 → the electromagnet 4 on the left side
The excitation coil of a → the excitation coil of the electromagnet 4b on the right side → the movable contact f of the changeover switch → the negative pole of the battery 6 forms a closed circuit, and a current flows through the closed circuit. Therefore, the electromagnets 4a and 4b on both sides of the permanent magnet 1 are excited, and the left electromagnet 4a has an S pole on the left side, an N pole on the right side, and an electromagnet 4b on the right side.
The left side is the south pole and the right side is the north pole. Therefore, the electromagnet 4
The a and 4b and the permanent magnet 1 repel each other, and a forward rotational force is applied to the wheel 2.

By repeating the above-mentioned operations (1) to (3), the wheel 2 continuously rotates forward, and in the case of a bicycle, the vehicle can run without pedaling.

[0021]

Second Embodiment Although the above description is for a case where one electromagnet 4 is provided, two or more electromagnets 4 may be provided. What is shown in FIG. 4 is a case where four electromagnets 4 are provided. In this case, a part of the frame 19 is laterally extended in an arc shape to form a curved portion 19a, the electromagnets 4 are attached to the curved portion 19a at equal intervals, and the electromagnets 4 are connected as shown in FIG. The electromagnets 4 have the same pole at the same time. Therefore, in the case of FIG. 4, the repulsive force of each electromagnet 4 repels the opposing permanent magnets, the rotational force applied to the wheel increases, and the rotational speed of the wheel increases.

[0022]

Other Embodiments of the Invention The synchronous switch 7 may be a transistor or the like instead of a commutator. In short, each time the permanent magnet 1 attached to the wheel 2 reaches the position of the electromagnet 4, it is synchronized with it. , The current from the battery 6 is ON,
It is only necessary that it can be turned off and the changeover switch 8 can be switched accordingly.

In the above embodiment, the wheel 2 is a bicycle wheel, but the wheel 2 may be a wheel of a rear car, a rickshaw, an automobile, a toy bicycle or an automobile. Further, the illustrated wheel 2 is a case where the inside of the rib is a disk, but the wheel 2 may be one in which a large number of spokes are provided inside the rib.

[0024]

[Effects of the Invention] The wheel drive device according to the first to fourth aspects of the present invention has the following effects. . When the wheel is a bicycle wheel, the bicycle travels without pressing the pedal, so that the bicycle can be easily traveled. . Since a drive source such as an engine, a motor and a transmission is not required, the structure is simple and compact. Also,
It is easy to put into practical use. . In the conventional electric bicycle, the transmission is decelerated by using one or two gears in order to match the rotation speed of the motor with the practical speed of the wheels. There is no reduction, which is advantageous in reducing cost weight and improving productivity.

In addition to the above effects, the wheel drive device according to a fourth aspect of the present invention is provided with two or more electromagnets in the circumferential direction of the wheel as shown in FIG. 4, so that the number of electromagnets increases as the number of electromagnets increases. The rotational force applied to the wheel increases and the rotational speed of the wheel increases.

[Brief description of drawings]

FIG. 1 shows a first embodiment of a wheel drive device of the present invention, (a) is a front view of the drive device, and (b) is a side view of the drive device.

FIG. 2 is a front view showing a wheel driving device of the present invention, showing a positional relationship between a permanent magnet and a non-conducting portion and a conducting portion of a comma.

FIG. 3 is a wiring diagram of a wheel driving device of the present invention.

FIG. 4 is a front view showing an example of a second embodiment of a wheel driving device of the present invention.

[Explanation of symbols]

 1 Permanent Magnet 2 Wheel 3 Wheel with Magnet 4 Electromagnet 5 Control Circuit 6 Battery 7 Synchronous Switch 8 Changeover Switch 9 Conductive Part 10 Non-conductive Part 11 Rotating Body 12 Contactor

Claims (4)

[Claims] 1. A magnet-equipped wheel (3) in which a large number of permanent magnets (1) are mounted at intervals in the circumferential direction of a wheel (2) and whose polarities are alternately changed, and a permanent magnet (1). The electromagnet (4) that gives a rotational force to the wheel (2) by the repulsive force of the wheel, and the electromagnet (4) each time the permanent magnet (1) approaches or leaves the electromagnet (4) as the wheel (2) rotates. A wheel drive device comprising: a control unit (5) for switching the direction of a current flowing to the motor; and a battery (6) for supplying power to the electromagnet (4). 2. A synchronous switch (7) for turning on / off the control unit (5) synchronously each time the permanent magnet (1) approaches or leaves the electromagnet (4) by the rotation of the wheel (2). ,
The switch (8) for switching the polarity of the electromagnet (4) by switching the direction of the current flowing through the electromagnet (4) according to ON / OFF of the synchronous switch (7). Wheel drive device as described. 3. A rotating body (11), wherein a synchronous switch (7) is provided with conductive parts (9) and non-conductive parts (10) alternately on the circumference and is rotatable in synchronization with the wheel (2). , Rotating body (11)
3. The wheel drive device according to claim 1, further comprising a contactor (12) alternately contacting the conductive portion (9) and the non-conductive portion (10) when the wheel rotates. 4. The wheel drive device according to claim 1, wherein two or more electromagnets (4) are provided in the circumferential direction of the wheel (2).