JPH1024886A - Torque assisting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assist the torque of a wheel of a man power type bicycle by the force gained by changing the small torque of a small type auxiliary motor into large torque utilizing the reaction force of permanent magnets with the same pole. SOLUTION: A torque assisting device is provided with a drive shaft 7a, which is rotatably provided in a frame, a rotor 10, which is fixed to the drive shaft 7a, a plurality of permanent magnets attached to at least one side of the rotor 10 with the same angle, a drive body 12, which is rotatably attached to the drive shaft 7a and opposes to the permanent magnets 11, drive permanent magnets 13, which can oppose to the permanent magnets 11 and repel the permanent magnets 11, a small type auxiliary motor 14, which drives the rotation of the drive body 12, and a small type battery, which is connected to the auxiliary motor 14. When the drive body 7a is rotated by the auxiliary motor 14, and the drive permanent magnets 13 approach the permanent magnets 11, the rotor 10 is rotated in the fixed direction by the repulsion of the magnets 11 and 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque assisting device for converting a small torque of a small auxiliary motor into a large torque by using a repulsive force of a permanent magnet having the same polarity. It is mainly used for a human-powered bicycle and is used for promoting the turning force of wheels or for turning a small household generator.

[0002]

2. Description of the Related Art In general, a human-powered bicycle is a convenient vehicle that is indispensable as a simple and extremely economical means of transportation. However, the bicycle runs a long distance or uphill because it is driven by the rider's leg strength. In such a case, or when a heavy load is loaded on a carrier, there is a drawback that the energy of the rider is extremely consumed and the tire is extremely tired.

[0003] Therefore, bicycles equipped with transmissions of various structures capable of changing the number of rotations of a pedal and bicycles equipped with a drive device comprising a motor and a battery have been developed and widely used.

[0004]

However, a bicycle equipped with a transmission can easily climb on a slope by changing the reduction ratio (gear ratio) when traveling on an uphill. If this is changed, the number of revolutions of the crank will increase, and there is a drawback that the leg movement becomes rather intense. As a result, the effort is not significantly reduced.
In addition, a bicycle equipped with a driving device including a motor and a battery can drive easily on an uphill slope because the axle is driven by power, and there are many demands for advantages such as low noise and no exhaust gas. Since it is equipped with a considerably large motor and battery, it is considerably heavier than a human-powered bicycle, and is inferior in handleability and economic efficiency.

The present invention has been made in view of such a problem, and converts a small rotational force of a small auxiliary motor into a large rotational force by using a repulsive force of a permanent magnet having the same polarity. It is an object of the present invention to provide a torque-enhancing device that can increase the torque of wheels of a human-powered bicycle and the like with this torque, and that is excellent in handleability and economy.

[0006]

According to one aspect of the present invention, a drive shaft rotatably provided on a frame, a rotor fixed to the drive shaft, A plurality of permanent magnets attached at equal angles to at least one side of the rotor, a driving body rotatably mounted on the drive shaft, facing the permanent magnet, and a driving body attached to the driving body, capable of facing the permanent magnet, and It has a driving permanent magnet that repels the permanent magnet, a small auxiliary motor that rotationally drives the driving body, and a small battery connected to the auxiliary motor, and the driving body is rotated by the auxiliary motor,
When the driving permanent magnet approaches the permanent magnet, the rotor is rotated in a certain direction by the repulsive force of the magnets.

According to a second aspect of the present invention, a transmission device with a clutch for transmitting the torque of the auxiliary motor to the driving body is interposed between the driving body and the auxiliary motor. Things.

According to a third aspect of the present invention, an intermediate drive is rotatably mounted on a drive shaft portion between a rotor and a drive, and the intermediate drive repels a permanent magnet and drives the intermediate drive. An intermediate permanent magnet that is attracted to a permanent magnet is attached.

The invention according to claim 4 of the present invention is characterized in that the outer peripheral portion or the whole of the rotor is formed by permanent magnets.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic side view of a human-powered bicycle equipped with the turning force assisting device 1 of the present invention,
The bicycle includes a frame 2, a front wheel 3 rotatably supported at a front portion of the frame 2, a rear wheel 4 rotatably supported at a rear portion of the frame 2, and a handle attached to a front portion of the frame 2. 5, a seat 6 attached to an intermediate portion of the frame 2, a crank 7 rotatably supported by a hanger portion of the frame 2, a pedal 8 attached to both ends of the crank 7, and rotation of the crank 7. A chain transmission mechanism 9 including a front sprocket 9a, a rear sprocket 9b, and a chain 9c for transmitting the rotation to the rear wheel 4 to rotate the rear wheel 4.
And a rotation assisting device 1 mounted on a hanger portion of the frame 2 and the like. The configuration other than the rotation assisting device 1 is configured in the same manner as a conventionally known human-powered bicycle.

The torque assisting device 1 converts a small torque of the small auxiliary motor 14 into a large torque using the repulsive force of the permanent magnets 11, 13 and 17, and applies this force to the wheels. The driving force of the pedal 8 can be reduced by the driving shaft 7a, the rotor 10, the plurality of permanent magnets 11, the driving body 12, and the plurality of driving permanent magnets 1.
3, a small auxiliary motor 14, a small battery 15, an intermediate driving body 16, a plurality of intermediate permanent magnets 17, and the like.

Specifically, as shown in FIGS. 1 and 2, the drive shaft 7a also serves as a crank shaft of a crank 7 rotatably provided on a hanger portion of the frame 2. In this example, the drive shaft 7 a is provided on the hanger portion and forms a part of the frame 2.
a is rotatably supported in bearing a via a bearing 18. A crank arm 7b is attached to one end, and a crank arm 7b and a front sprocket 9a are attached to the other end. The support case 2a is formed of a metal material made of a non-magnetic material such as an aluminum alloy so as not to receive the magnetism of the permanent magnet 11 and the drive permanent magnet 13, and the inner diameter of the support case 2a is internally provided by the rotation assisting device 1. Is selected so that it can accommodate

The outer periphery of the rotor 10 is formed by a permanent magnet, and is fixed to the drive shaft 7a (crankshaft) so as not to move in the axial direction. In this example, the rotor 10 has a drive shaft 7a (crankshaft) as shown in FIG.
The support disk 10a is formed of a metal material made of a nonmagnetic material such as an aluminum alloy, and an annular body 10b made of a permanent magnet is fitted on the outer peripheral surface of the support disk 10a.
The annular body 10b of the rotor 10 has a magnetic flux density of 100.
An annular permanent magnet of 0 gauss (for example, an alnico magnet, a ferrite magnet, a rare earth magnet, etc.) is used.

As shown in FIGS. 2 and 3, the permanent magnet 11 is formed in an annular shape larger than the width W of the annular body 10b of the rotor 10, and is formed on one surface of the annular body 10b at equal angles (180 degrees). Every) and on the same circumference. That is, each permanent magnet 11 is magnetically attached to one surface of the annular body 10b by facing different magnetic poles to the magnetic poles of the annular body 10b. Therefore, the permanent magnet 11
Can be easily and easily attached to the annular body 10b. The permanent magnet 11 is a permanent magnet having a magnetic flux density of 800 gauss (for example, an alnico magnet, a ferrite magnet, a rare earth magnet, etc.).

As shown in FIGS. 2 and 5, the driving body 12 is formed in a disc shape from a metal material made of a nonmagnetic material such as an aluminum alloy, and is located at a position facing the permanent magnet 11 and at a driving shaft. 7a is rotatably supported via a bearing 19. Further, a thin rubber disc 20 is adhered to a surface of the driving body 12 opposite to the rotor 10.

As shown in FIGS. 2 and 5, the driving permanent magnet 13 is formed in an annular shape having the same size as the permanent magnet 11 attached to the rotor 10, and
It is attached to the surface opposite to 0 at equal angles (every 180 degrees) and on the same circumference. The driving permanent magnet 13 is
It is attached to the driving body 12 with an adhesive or the like with the same magnetic poles facing the magnetic poles on the outer surface of the permanent magnet 11 on the rotor 10 side, and when the driving permanent magnet 13 approaches the permanent magnet 11, it repels. I am trying to meet each other.
The driving permanent magnet 13 has a permanent magnet having a magnetic flux density of 800 gauss (for example, an alnico magnet,
Ferrite magnets, rare earth magnets, etc.) are used.

The auxiliary motor 14 is, as shown in FIG.
It is fixed to a side wall portion in the support case 2a via a bracket 21 and a bolt / nut 22, and rotates the driving body 12 by friction transmission. That is, the auxiliary motor 14 can rotate the driving body 12 by fixing the rubber roller 23 to the output shaft thereof and bringing the rubber roller 23 into contact with the outer peripheral edge of the rubber disk 20 of the driving body 12. I have.

The auxiliary motor 14 is connected to a battery 15 attached to the bicycle frame 2 via lead wires, fuses, terminals and the like (all not shown), and a switch provided on a handle portion of the bicycle. By performing an ON-OFF operation of (not shown), it is possible to drive appropriately. The auxiliary motor 14 is a small motor 14 (diameter: about 30 mm, total length: about 60 mm) having an output of 400 mW and a rotation speed of 1,965 rpm. The battery 15 is a small battery 15 having a voltage of 6 V and a current of 0.3 A (height: about 95 mm,
(Width: about 70 mm, depth: about 45 mm).

As shown in FIGS. 2 and 4, the intermediate driving body 16 is formed by connecting a plurality of rectangular plates made of a non-magnetic metal material such as an aluminum alloy with rivets. , Is rotatably supported between the rotor 10 and the driving body 12 and on the driving shaft 7a via a bearing 24.

As shown in FIGS. 2 and 4, the intermediate permanent magnet 17 is formed in an annular shape having the same size as the permanent magnet 11 attached to the rotor 10, and a surface of the intermediate driving body 16 facing the rotor 10. At equal angles (every 180 degrees) and on the same circumference. Also, the intermediate permanent magnet 17
Is attached to the intermediate driving body 16 with an adhesive or the like with the same magnetic pole facing the magnetic pole on the outer surface of the permanent magnet 11 on the rotor 10 side, and the intermediate permanent magnet 17 approaches the permanent magnet 11 Sometimes, they repel each other, and when they approach the drive permanent magnet 13, they attract each other. As the intermediate permanent magnet 17, a permanent magnet having a magnetic flux density of 800 gauss (for example, an alnico magnet, a ferrite magnet, a rare earth magnet, or the like) is used similarly to the permanent magnet 11.

When the driving body 12 is rotated by the auxiliary motor 14, and the driving permanent magnet 13 approaches the permanent magnet 11,
The repulsive force between the rotors 3 and 17 causes the rotor 10 to rotate in a fixed direction (the direction in which the crank 7 rotates when the rider steps on the bicycle). That is, the mounting position of each of the permanent magnets 11, 13, 17; the distance between the permanent magnet 11 and the intermediate permanent magnet 17; the distance between the intermediate permanent magnet 17 and the driving permanent magnet 13; When the magnet 13 approaches the intermediate permanent magnet 17, the intermediate driving body 16 is driven by the magnetic force of the two magnets 13, 17.
When the driving permanent magnet 13 and the intermediate permanent magnet 17 approach the permanent magnet 11,
The rotor 10 rotates in a fixed direction (the direction of the arrow in FIG. 3) due to the repulsive forces 1, 13, and 17.

In FIG. 2, 25 is a spacer, 2
6 is a thrust bearing and 27 is a stopper member.

When the rider operates a switch (not shown) provided on the steering wheel 5 to activate the auxiliary motor 14 in the bicycle equipped with the torque assisting device 1,
The frictional transmission between the rubber roller 23 and the rubber disc 20 causes the driving body 12 to rotate in a certain direction (the direction in which the crank 7 rotates when the rider steps on the bicycle). At this time, since the driving body 12 is rotatably supported by the driving shaft 7a via the bearing 19, the driving body 12 can easily and easily rotate even with a small rotational force of the auxiliary motor 14.

When the driving body 12 rotates, the magnets 13 and 17 are attracted to each other because the magnetic poles of the opposing driving permanent magnet 13 and the intermediate permanent magnet 17 are different. Will rotate. At this time, the intermediate driving body 16 is rotatably supported on the driving shaft 7 a via a bearing 24, and the attraction force of the magnets 13 and 17 acts between the driving body 12 and the intermediate driving body 16. Combined with this, it will rotate easily and easily.

When the driving body 12 and the intermediate driving body 16 rotate in an integrated state, and the driving permanent magnet 13 and the intermediate permanent magnet 17 approach the permanent magnet 11, the driving permanent magnet 13, the intermediate permanent magnet 17, and the rotor Since the magnetic pole of the permanent magnet 11 on the 10 side is the same as that of the permanent magnet 11, a repulsive force acts between the magnetic poles and a rotational force is applied to the rotor 10 in the same direction as the driving body 12 (the direction of the arrow in FIG. 3). In addition, since the rotational force of the auxiliary motor 14 is transmitted to the rotor 10 by using the magnetic force of the permanent magnets 11, 13, and 17, the relatively large rotor 10 can be rotated easily and easily.

Then, the driving body 12 and the intermediate driving body 16
Is continuously rotated by the auxiliary motor 14, so that a continuous rotational force is applied to the rotor 10,
This promotes the rotation of the drive shaft 7a. This torque is
The power is transmitted to the rear wheels 4 via the chain transmission mechanism 9 and is used as auxiliary power for running the bicycle.

Accordingly, in the bicycle equipped with the turning force assisting device 1 of the present invention, the stepping force of the pedal 8 is reduced, the bicycle can be run with a light force, and the running speed of the bicycle can be increased. A great effect can be exerted to reduce labor. Further, since the rotor 10 attached to the drive shaft 7a functions as a flywheel, the rotation of the drive shaft 7a becomes uniform, and the running of the bicycle is stabilized. Further, since the rotor 10 is formed of a permanent magnet and the intermediate permanent magnet 17 is disposed between the permanent magnet 11 and the driving permanent magnet 13, the magnetic force increases, and the repulsive force increases. A large rotational force is applied to the rotor 10.

FIG. 6 shows a rotational force promoting device 1 according to another embodiment of the present invention. In this rotational force promoting device 1, the intermediate driving body 16 and the intermediate permanent magnet 17 are omitted, and the driving
The rotor 10 is rotated by the repulsive force of the driving permanent magnet 13 attached to the rotor 10 and the permanent magnet 11 attached to the rotor 10, and the other configuration is the rotational force promoting device 1 of the above example (shown in FIG. 1). ). Note that the same members as those of the rotational force assisting device 1 of the above example are denoted by the same reference numerals. This rotational force promoting device 1 can also achieve the same operation and effect as the rotational force promoting device 1 of the above example.

FIG. 7 is a schematic side view of a human-powered bicycle equipped with a turning force assisting device 1 according to still another embodiment of the present invention. The bicycle includes a frame 2, a front wheel 3, a rear wheel 4, and a steering wheel 5. , A seat 6, a crank 7, a pedal 8, a chain transmission mechanism 9 (comprising a front sprocket 9a, a rear sprocket 9b, and a chain 9c), a rotational force assisting device 1, and the like. It has the same structure as a conventionally known human-powered bicycle.

The torque assisting device 1 converts the small torque of the small auxiliary motor 14 into a large torque using the repulsive force of the permanent magnets 11, 13 and applies this force to the wheels to apply the force to the wheels. 8, a driving shaft 7a, a rotor 10, a plurality of permanent magnets 11, a driving body 12, a plurality of driving permanent magnets 13, a small auxiliary motor 14, a small battery 15, and a clutch. The transmission 30 includes a transmission 28 and the like.

Specifically, as shown in FIGS. 7 and 8, the drive shaft 7a also serves as a crank shaft of a crank 7 rotatably provided on a hanger portion of the frame 2. The drive shaft 7a is rotatably supported via a bearing 18 in a cylindrical box-shaped support case 2a provided on a hanger portion and forming a part of the frame 2, and a crank arm 7b is provided at one end. A crank arm 7b and a front sprocket 9a are attached to the other end, respectively. The support case 2a is formed of a nonmagnetic metal material such as an aluminum alloy so as not to receive the magnetism of the permanent magnet 11 and the drive permanent magnet 13.

As shown in FIG. 8, the rotor 10 is fitted on a drive shaft 7a (crankshaft) and has a support disk 10a made of a nonmagnetic metal material such as an aluminum alloy, and a support disk 10a. And an annular body 10b made of a permanent magnet fitted to the outer peripheral surface of 10a. Note that an annular permanent magnet (for example, an alnico magnet, a ferrite magnet, a rare earth magnet, or the like) having a magnetic flux density of 1000 Gauss is used for the annular body 10b of the rotor 10.

As shown in FIGS. 8 and 10, the permanent magnet 11 is formed in a rectangular parallelepiped shape, and is attached to both surfaces of the annular body 10b at every 180 degrees and on the same circumference. That is, each permanent magnet 11 is magnetically attached to the side surface of the annular body 10b by facing different magnetic poles to the magnetic poles of the annular body 10b. Therefore, the permanent magnet 11
Can be easily and easily attached to the annular body 10b. The permanent magnet 11 is a permanent magnet having a magnetic flux density of 800 gauss (for example, an alnico magnet, a ferrite magnet, a rare earth magnet, etc.).

As shown in FIGS. 8 and 10, the driving body 12 is formed in a frame shape from a metal material made of a non-magnetic material such as an aluminum alloy, and has a cross-sectional shape facing one side surface of the rotor 10. And a disk 12 fixed to both ends of the plate 12a and facing the other side surface of the rotor 10.
b. The driving body 12 is disposed so as to surround the rotor 10 and is rotatably supported on the driving shaft 7a via a bearing 19.

The driving permanent magnet 13 is shown in FIGS.
As shown in FIG. 2, the drive member 12 is attached to the inner surface of the plate member 12a and the inner surface of the disk member 12b of the driving body 12 at every 180 degrees and on the same circumference so as to face the permanent magnet 11. I have. The driving permanent magnet 13 is attached to the driving body 12 with an adhesive or the like with the same magnetic pole facing the magnetic pole on the outer surface of the permanent magnet 11 on the rotor 10 side. When they approach the magnet 11, they repel each other. The driving permanent magnet 13 has a magnetic flux density of 8 like the permanent magnet 11.
A 00 gauss permanent magnet (eg, alnico magnet, ferrite magnet, rare earth magnet, etc.) is used.

The auxiliary motor 14 is, as shown in FIG.
It is fixed to a gear case 29a of a transmission 28 described later. The auxiliary motor 14 is connected to a battery 15 attached to the bicycle frame 2 via a lead wire, a fuse, a terminal, etc. (all not shown), and a motor switch (provided on a handle portion of the bicycle). By performing ON-OFF operation of (not shown), it is possible to drive appropriately. The auxiliary motor 14 is a small motor 14 (diameter: about 40 mm, total length: about 100 mm) having an output of 400 mW and a rotation speed of 1,965 rpm. The battery 15 is a small battery 15 having a voltage of 6 V and a current of 0.3 A (height: about 95 mm,
(Width: about 70 mm, depth: about 45 mm).

The transmission device 28 is interposed between the driving body 12 and the auxiliary motor 14 and appropriately transmits or shuts off the rotational force of the auxiliary motor 14 to the driving body 12. . In this example, the transmission 28 includes a gear transmission 29, a clutch 30, and a belt transmission 31 so that the rotation speed of the auxiliary motor 14 can be reduced to an optimum rotation speed.

Specifically, as shown in FIGS. 8 to 10, the gear transmission mechanism 29 includes a gear case 29a fixed to the support case 2a, an input shaft 29b rotatably supported by the gear case 29a, and a gear case 29a. The output shaft 29c, which is rotatably supported by the shaft 29a and has one end protruding outside the gear case 29a, a small-diameter drive bevel gear 29d fixed to the output shaft of the auxiliary motor 14, and an input shaft 29b, A large-diameter driven bevel gear 29e meshed with the bevel gear 29d, a small-diameter gear 29f fitted to the input shaft 29b, and a small-diameter gear 29f fitted to the output shaft 29c.
And a large-diameter gear 29g that meshes with.

The clutch 30 arbitrarily transmits or disconnects the torque of the output shaft 29c of the gear transmission mechanism 29 to the belt transmission mechanism 31. In this example, the clutch 30 is an electromagnetic clutch ( For example, OGURA CL
UTCH CO. LTD. Model AMC10
DC12V) is used. Also, the clutch 30
(Electromagnetic clutch) includes a stationary portion 30a fixed to the gear case 29a and a movable portion 3 rotatable with respect to the stationary portion 30a.
0b, and a gear case 29a of the output shaft 29c.
It is inserted in the part which protrudes outward from. Further, the clutch 30 is connected to the battery 15 attached to the bicycle frame 2 via a lead wire, a fuse, a terminal, etc. (all not shown), and a clutch switch (not shown) provided on the handle 5 of the bicycle. When (omitted) is turned on, the rotational force of the output shaft 29c is applied to the movable unit 30 via the friction plate.
b, and the movable portion 30b rotates. When the clutch switch is turned off, the rotational force of the output shaft 29c is cut off, and the movable portion 30b stops.

As shown in FIG. 8, the belt transmission mechanism 31 is rotatably mounted on the drive shaft 7a via a bearing 32 and a small-diameter drive pulley 31a fixed to the movable portion 30b of the electromagnetic clutch 30. It is composed of a large-diameter driven pulley 31b connected to the disk 12b of the body 12 by bolts and nuts 33, and an endless belt 31c wound around both pulleys 31a and 31b.

When the rotational force of the auxiliary motor 14 is transmitted to the driving body 12 via the gear transmission mechanism 29, the clutch 30 and the belt transmission mechanism 31, the transmission unit 28 keeps the driving body 12 constant. It can rotate in the direction (the direction in which the crank 7 rotates when the rider rides a bicycle).

In FIG. 8, 25 is a spacer, 2
6 is a thrust bearing.

In the bicycle equipped with the torque assisting device 1, the rider turns on a motor switch (not shown) provided on the handle 5 to start the auxiliary motor 14, and the handle is also turned on. When the clutch 30 is connected by turning on a clutch switch (not shown) provided on the gear 5, the rotational force of the auxiliary motor 14
9, transmitted to the driving body 12 via the clutch 30 and the belt transmission mechanism 31, and the driving body 12 rotates in a certain direction (the direction in which the crank 7 rotates when the rider rides a bicycle). At this time, the driving body 12 is rotatably supported by the driving shaft 7a via a bearing 19, and the transmission torque is increased by the deceleration, so that the driving force of the auxiliary motor 1 is increased.
Even a small rotation force of 4 makes it easy and easy to rotate.

When the driving body 12 rotates and the driving permanent magnet 13 approaches the permanent magnet 11, since the driving permanent magnet 13 and the permanent magnet 11 on the rotor 10 have the same magnetic pole, a repulsive force acts between them. Then, a rotational force is applied to the rotor 10 in the same direction as the driving body 12 (the direction of the arrow in FIG. 10). Since the torque of the auxiliary motor 14 is transmitted to the rotor 10 using the magnetic force of the permanent magnets 11 and 13, the relatively large rotor 10 can be rotated easily and easily.

Since the driving body 12 is continuously rotated by the auxiliary motor 14, a continuous torque is applied to the rotor 10, and the rotation of the driving shaft 7a is promoted. This torque is transmitted to the rear wheels 4 via the chain transmission mechanism 9 and is used as auxiliary power for running the bicycle.

The rotational force promoting device 1 can also provide the same functions and effects as those of the above-described respective examples of the rotational force promoting device 1.
Of course, in the torque assisting device 1, since the transmission 28 with the clutch 30 is interposed between the driving body 12 and the auxiliary motor 14, the rotation of the crank 7 when the auxiliary motor 14 is stopped. The crank 7 can be turned with a small force without transmitting the force to the auxiliary motor 14 side.

In each of the above examples (shown in FIGS. 2, 6 and 8), the torque assisting device 1 is mounted on a hanger portion of a bicycle, and the crankshaft of the crank 7 and the torque assisting device are attached. However, in another example, the driving force assisting device 1 is mounted above the hanger portion of the bicycle, and the driving shaft 7a and the crank 7 of the rotating force assisting device 1 are mounted.
May be interlocked with the crankshaft via a chain transmission mechanism. Alternatively, the torque assisting device 1 may be mounted on the axle portion of the rear wheel 4 of the bicycle, and the drive shaft 7a of the torque assisting device 1 may be connected to the rear. The axle of the wheel 4 may also be used.

In each of the above embodiments, the crank arm 7b is fixed directly to both ends of the drive shaft 7a. In other embodiments, the crank arm 7b is fixed between the drive shaft 7a and the crank arm 7b. A one-way clutch (not shown) is interposed and the drive shaft 7
Even when a is rotating, the rotation of the crank arm 7b and the pedal 8 may be stopped.

In each of the above examples, the support case 2a, the driving body 12, the intermediate driving body 16 and the like are formed of a nonmagnetic metal material. In other examples, these members are made of plastic. It may be formed of a material.

In each of the above embodiments, the outer peripheral portion (annular body 10b) of the rotor 10 is formed by permanent magnets. In other embodiments, the entire rotor 10 is formed by permanent magnets. Alternatively, the entire rotor 10 may be formed of a metal material made of a magnetic material or a metal material made of a non-magnetic material.

The first example (shown in FIG. 2) and the second example
In the example (shown in FIG. 6), two permanent magnets 11 are mounted on one side of the rotor 10, but in other examples, the permanent magnets 11 are equiangularly mounted on one side of the rotor 10. Three or more pieces may be attached every time. in this case,
It is preferable that the same number of drive permanent magnets 13 and intermediate permanent magnets 17 as the permanent magnets 11 are arranged. As a result, the rotation of the rotor 10 becomes smoother, and the repulsive force increases, so that a large rotational force is applied to the rotor 10.

In the third example (shown in FIG. 8), two permanent magnets 11 are attached to both surfaces of the rotor 10, respectively. Three or more permanent magnets 11 may be attached to both surfaces at equal angles, or two or more permanent magnets 11 may be attached to only one surface of rotor 10 at equal angles. In this case, it is preferable that the same number of the driving permanent magnets 13 as the permanent magnets 11 are arranged.

In the first and second examples, annular permanent magnets 11, driving permanent magnets 13 and intermediate permanent magnets 17 are used. Disc-shaped or rectangular parallelepiped permanent magnets 11, 13, 17 may be used.

In the third embodiment, the permanent magnets 11 and the driving permanent magnets 13 are rectangular parallelepiped. In other embodiments, the permanent magnets 11 and 13 are annular. Alternatively, a disk-shaped material may be used.

In the first example, the intermediate driving body 16
Is formed of a rectangular metal plate, but in another example, the intermediate driving body 16 may be formed of a circular metal plate.

In the third embodiment, the rotor 10 is rotated by the repulsive force of the driving permanent magnet 13 attached to the driving body 12 and the permanent magnet 11 attached to the rotor 10. In this method, an intermediate drive 16 is rotatably mounted on a drive shaft 7a between the rotor 10 and the drive 12 so that the intermediate drive 16 repels the permanent magnet 11 and Intermediate permanent magnet 1 that attracts each other
7 may be attached

In the first and second examples, the rotational force of the auxiliary motor 14 is applied to the driving body 1 by using a friction transmission mechanism.
2, the torque may be transmitted to the driving body 12 by using a gear transmission mechanism in another example.

In the first example, the permanent magnet 11 is attached to one side of the rotor 10, and the driving body 12, the intermediate driving body 16, and the driving permanent magnet 1 are located on one side of the rotor 10.
3, the intermediate permanent magnet 17, the auxiliary motor 14 and the like are provided. However, in another example, the permanent magnets 11 are attached to both surfaces of the rotor 10, and the driving bodies 12, The intermediate driving body 16, the driving permanent magnet 13, the intermediate permanent magnet 17, the auxiliary motor 14, and the like may be respectively provided to rotate the rotor 10.

In the second example, the permanent magnet 11 is attached to one side of the rotor 10, and the driving body 12, the driving permanent magnet 13, and the auxiliary motor 14 are located at one side of the rotor 10.
However, in other examples, permanent magnets 11 are attached to both surfaces of the rotor 10, and a driving body 12, a driving permanent magnet 13, an auxiliary motor 14, and the like are provided on both sides of the rotor 10. The rotor 10 may be rotated respectively.

In the third embodiment, the auxiliary motor 14 and the clutch 30 of the transmission 28 are arranged outside the support case 2a. In other embodiments,
The entire transmission 28 may be arranged in the support case 2a.

In the third example, the transmission device 28 includes the gear transmission mechanism 29, the clutch 30, and the belt transmission mechanism 31.
However, in another example, the transmission 28 may be constituted by a gear transmission 29, a clutch 30, and a chain transmission.

In each of the above-described embodiments, the torque assisting device 1 of the present invention is mounted on a bicycle. In other examples, the drive shaft 7a of the torque assisting device 1 is connected to a household. The generator may be connected to a small generator (not shown) in an interlocked manner, and the generator may be turned by using the torque assisting device 1.

[0063]

As described above, the rotational force assisting device according to the first aspect of the present invention fixes a rotor having a permanent magnet attached to a drive shaft, and has a drive permanent magnet that repels the permanent magnet on the drive shaft. The mounted driving body is rotatably supported, and the driving body is rotationally driven by an auxiliary motor to apply a rotating force to the rotor and the drive shaft by using the repulsive force of the permanent magnet and the driving permanent magnet. Thus, the small torque of the auxiliary motor can be converted to a large torque. As a result, when the turning force assisting device of the present invention is mounted on a human-powered bicycle to increase the turning force of the wheels, the pedal depressing force is reduced, regardless of the level ground or uphill. The bicycle can be run with a light force, and the running speed of the bicycle can be increased, so that a great effect can be exerted in reducing labor. In addition, since the rotor attached to the drive shaft acts as a flywheel, the rotation of the drive shaft becomes uniform,
The running of the bicycle will be stable. Furthermore, since the repulsive force of the magnet is used, extremely small motors and batteries can be used, and the size and cost of the device itself can be reduced, and handling efficiency and economy are improved. Will also be excellent.

In the torque assisting device according to the second aspect of the present invention, since a transmission with a clutch is interposed between the driving body and the auxiliary motor, when the clutch is disengaged, the torque of the crank is reduced. Can be prevented from being transmitted to the auxiliary motor side. As a result, the crank can be turned with a light force, even though the auxiliary motor is stopped.

According to the third aspect of the present invention, the intermediate driving body having the intermediate permanent magnet is rotatably mounted on the driving shaft portion between the rotor and the driving body. The force will be increased and the rotation of the rotor and drive shaft will be more facilitated.

In the torque assisting device according to the fourth aspect of the present invention, since a part or the whole of the rotor is formed by permanent magnets, the magnetic force is increased, and the repulsive force is increased to apply a large torque to the rotor. can do. Further, the permanent magnet can be easily and easily attached to the rotor.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a bicycle equipped with a torque assisting device of the present invention.

FIG. 2 is a vertical cross-sectional view of the rotational force assisting device.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a sectional view taken along line CC of FIG. 2;

FIG. 6 is a vertical cross-sectional view of a rotational force assisting device according to another example of the present invention.

FIG. 7 is a schematic side view of a bicycle equipped with a turning force assisting device according to still another example of the present invention.

FIG. 8 is a cross-sectional view of the torque assisting device in FIG. 7;

FIG. 9 is a front view of the torque assisting device in FIG. 7;

FIG. 10 is a sectional view taken along line DD of FIG. 8;

FIG. 11 is a sectional view taken along line EE of FIG. 8;

[Explanation of symbols]

Reference numeral 1 denotes a rotational force assisting device, 2 denotes a frame, 7a denotes a drive shaft, 1
0 is a rotor, 11 is a permanent magnet, 12 is a driving body, 13 is a driving permanent magnet, 14 is an auxiliary motor, 15 is a battery, 1
6 is an intermediate driving body, 17 is an intermediate permanent magnet, 28 is a transmission, and 30 is a clutch.

Claims (4)

[Claims] 1. A drive shaft (7a) rotatably provided on a frame (2), a rotor (10) fixed to the drive shaft (7a), and at least one surface of the rotor (10) at equal angles. And a plurality of permanent magnets (11) attached to the rotor and a rotor (10) rotatably attached to the drive shaft (7a).
A driving body (12) opposed to the side surface on which the permanent magnet (11) is mounted, and a drive mounted on the driving body (12) and capable of facing the permanent magnet (11) and repelling with the permanent magnet (11). A permanent magnet (13), a small auxiliary motor (14) for rotatingly driving the driver (12), and an auxiliary motor (1);
4) connected to a small battery (15), the driving body (7a) is rotated by the auxiliary motor (14), and the driving permanent magnet (13) is rotated by the permanent magnet (1).
A rotating force assisting device characterized in that the rotor (10) rotates in a certain direction due to the repulsive force of the magnets (11) and (13) when approaching 1). 2. The rotational force of the auxiliary motor (14) is applied between the driving body (12) and the auxiliary motor (14).
2. A torque assisting device according to claim 1, further comprising a transmission (28) with a clutch (30) for transmitting the torque to the transmission. 3. An intermediate driver (16) is rotatably mounted on a drive shaft (7a) between the rotor (10) and the driver (12), and a permanent magnet (11) is attached to the intermediate driver (16). )
3. The torque assisting device according to claim 1, further comprising an intermediate permanent magnet (17) that repels and attracts the driving permanent magnet (13). 4. The torque assisting device according to claim 1, wherein an outer peripheral portion or the whole of the rotor (10) is formed by a permanent magnet.