JPH06321170A - Electric motor device also used as generator, and bicycle or tricycle with electric motor device also used as generator - Google Patents

Abstract

PURPOSE:To provide an electric bicycle having a motor usable also as a generator. CONSTITUTION:A motor and a drive transmitting mechanism for connecting the rotating shaft 42 of the motor to the hub 28 of a rear wheel are provided in the hub 28. The drive transmitting mechanism is formed of a speed reducing mechanism 49 for transmitting the rotation driving force of the rotating shaft 42 to the hub 28 and a speed increasing mechanism 51 for transmitting the rotation driving force of the hub 28 to the rotating shaft 42. A second ratchet mechanism 50 is provided between the output gear of the speed reducing mechanism 49 and the inner teeth of the hub 28 inner circumferential surface part, and a third ratchet mechanism 52 is also provided between the input gear of the speed increasing mechanism 51 and the inner teeth of the hub 28 inner circumferential surface part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator / motor device and a two-wheel or three-wheel vehicle with a generator / motor device, and more particularly to a generator / motor device suitable for a two-wheel vehicle or a three-wheel vehicle equipped with a motor as auxiliary power. The present invention relates to a two-wheeled vehicle or a three-wheeled vehicle equipped with the electric power generation / motor device.

[0002]

2. Description of the Related Art Conventionally, as an electric bicycle equipped with a motor as an auxiliary power, for example, a motor mounted on a frame body (for example, Japanese Utility Model Publication No. 56-46494 and Japanese Utility Model Publication No. 56-60698, Kaisho 56-39980
Mounted in the hub of the wheel (for example, Japanese Utility Model Publication No. 50-94656 and Japanese Utility Model Publication No. 50-94657).
Gazette, Japanese Utility Model Publication No. 50-94658, and Japanese Utility Model Publication No. 49-
No. 26243) is proposed. Further, in the case where the motor is installed in the hub of the wheel, it has been proposed to replace the motor and install the generator inside the hub.

[0003]

By the way, a two-wheeled vehicle, a three-wheeled vehicle, or the like may travel by inertia on a downhill or the like. Electric power is generated using the torque of the wheels during such coasting, and electricity is stored in a battery, etc., and this accumulated electricity is used as needed for traveling on flat road surfaces or uphills. If possible, energy can be used efficiently. Further, in this case, if the electric motor can also be used as the generator, the weight of the vehicle body can be reduced as compared with the case where the electric motor and the generator are separately provided. Therefore, the present inventor has conducted extensive studies to combine the use of the electric motor as a generator, and particularly when a relatively small electric motor for two-wheeled or three-wheeled vehicle is to be used as a generator, the rotational force of the wheels is used as a generator. It may be difficult to use the speed reduction mechanism provided between the output shaft and the wheels for transmitting the drive from the motor to the wheels as it is as the speed increasing mechanism. I confirmed that there are many problems. That is, in order to drive the wheels of a two-wheeled vehicle or a three-wheeled vehicle using such a relatively small electric motor as a power source, a reduction mechanism having a considerably small reduction ratio such as 20: 1 is provided between the output shaft of the electric motor and the wheels. However, it is difficult to transmit drive from the wheel side to the output shaft of the electric motor through such a speed reduction mechanism.

The present invention has been made in view of the above problems, and an object of the present invention is to allow a motor for transmitting drive through a reduction mechanism having a relatively small reduction ratio to be easily used for generation. An electric motor device and a two-wheeled vehicle or a three-wheeled vehicle equipped with such an electric motor device for both power generation.

[0005]

In order to achieve the above object, a generator / motor device according to claim 1 decelerates and transmits the rotation of a rotor of an electric motor to drive a predetermined rotating body, and at the same time, appropriately. In a generator / motor device that accelerates the rotation of the rotating body and transmits the rotation to the rotor to generate electric power, the rotation of the rotating body is separate from a reduction mechanism for transmitting the rotation of the rotor to the rotating body. It is characterized in that a speed-up mechanism for transmitting the power to the rotor is provided. Further, a power-generator / motor device according to a second aspect is the power-generator / motor device according to the first aspect, in which the reduction mechanism or the speed increasing mechanism is used.
It is characterized in that a connection switching means for switching between connecting the rotor and the rotating body is provided. A two-wheeled or three-wheeled vehicle with a power-generator / motor device according to claim 3 is a two-wheel or three-wheel vehicle with a power-generator / motor device according to claim 1 provided in an axle hub.
In the hub, together with the speed reducing mechanism and the speed increasing mechanism,
A freewheel clutch capable of transmitting drive only from the rotating shaft to the hub via the speed reduction mechanism, and a freewheel clutch capable of transmitting drive only from the hub to the rotating shaft via the speed increasing mechanism are provided. It is characterized by that. A two-wheeled or three-wheeled vehicle with a power-generator / motor device according to a fourth aspect is a two-wheel or three-wheel vehicle with a power-generator / motor device having the power-generator / motor device according to claim 2 in a hub of an axle. A switching mechanism portion of the connection switching means is provided together with the speed reduction mechanism and the speed increasing mechanism. The two-wheeled or three-wheeled vehicle with a combined power generation and electric motor device according to a fifth aspect is the two-wheeled or three-wheeled vehicle with a combined power generation and electric motor device according to the fourth aspect, wherein the connection switching means causes the rotor and the rotating body to pass through the reduction mechanism. It is configured so that it can be in a connected state, a state in which the rotor and the rotating body are connected via the speed increasing mechanism, and a state in which the rotor and the rotating body are mutually free. To do.

[0006]

EXAMPLE An example in which the present invention is applied to a motorized bicycle will be described below. FIG. 1 is a schematic configuration diagram of a motorized bicycle according to the present embodiment, and FIG. 2A is a sectional view of a hub of a rear wheel of the bicycle.

In FIG. 1, this bicycle has a frame similar to that of a general bicycle. That is, the front end of the substantially horizontal top tube 10 and the down tube 1
The upper end of 1 is connected by a head tube 12, and the rear ends of the top tube 10 and the down tube 11 each form a substantially triangular shape at a predetermined position of a seat tube 14 having a saddle 13 attached to the upper end. Is joined to. Further, a pair of chain stays 15 located on both sides of the rear wheel extend rearward and substantially horizontally from the joint between the down tube 11 and the seat tube 14, and the rear ends of the pair of chain stays 15 are formed. The upper portion of the seat tube 14 is connected to a predetermined position by a pair of seat stays 16 located on both sides of the rear wheel.

The lower portion of the handle 17 is rotatably inserted into the top tube 10, and the handle 1
The lower end of 7 connects the upper ends of a pair of front hawk stays 18 located on both sides of the front wheel.
It is fixed to. A hub 21 of a front wheel 20 is rotatably attached to the lower ends of the pair of front fork stays 18. In addition, a hanger shaft 24 connecting the bases of the cranks 23 to which the pedals 22 are rotatably attached is connected to the joint between the lower end of the down tube 11 and the lower end of the seat tube 14 via a bearing (not shown). A pedal sprocket 26, on which a chain 25 extending rearward is suspended, is attached to the hanger shaft 24. This chain 25 has rear wheels 27 at the rear.
Is mounted on a driven sprocket 29 (see FIG. 2) attached to the hub 28 of FIG. The hub 28 of the rear wheel 27 is rotatably attached to a hub shaft 30 that is fixedly attached to the joint between the pair of chain stays 15 and the pair of seat stays 16. In the front and rear wheels 20 and 27, the inner ends of many spokes (not shown) are attached to the outer peripheral portions of the hubs 21 and 28, and the outer ends of these spokes are attached to the rims 31 and 32 of the tire.

In this embodiment, the hub 2 of the rear wheel 27 is used.
A generator / motor device is internally provided in the control unit 8, and a control unit and a battery 33 electrically connected to the generator / motor device.
Is attached to the top tube 10 and the like below the saddle 13.

In FIG. 2, the hub 28 is rotatably mounted on a hub shaft 30 fixed to the vehicle body. Specifically, the end wall 34 on the left side in FIG. 2 of the hub 28 is supported by the hub shaft 30 via a waterproof bearing 35, and the end wall 36 on the right side in FIG. 2 of the hub 28 is an opening formed here. The yoke 37, which is fixed to the hub shaft 30 of the motor incorporated therein, is supported on the outer periphery of the right end wall protruding portion 40a of the yoke 37 via a waterproof bearing 38. The inner ends of the spokes 39 are fixed to the peripheral wall of the hub 28, and the first ratchet 3 is provided at the left end, for example.
The driven sprocket 29 is attached via 5. The first ratchet 35 transmits the driving force by pushing the hub 28 with the pawl when the bicycle is driven manually by depressing the pedal 22, while the pawl slides when the hub 28 is rotated by a motor and the driven sprocket is driven. 29 is released. A cooling fin 41 is also formed on the outer peripheral portion of the hub 28.

A motor, a rotary shaft 42 of a rotor of the motor, and a hub 28 as a rotor are provided in the hub 28.
A drive transmission mechanism for connecting the internal teeth formed on the inner peripheral surface of the drive gear is internally provided. That is, in the motor, the yoke 37 is installed inside the hub 28, and the yoke 37 is mounted as described above.
The right end surface projecting portion 37 a of the is fixed to the hub shaft 30 and is exteriorly mounted on the hub shaft 30. A stator 43 is built in the yoke 37, and a brush device 44 is attached to the inner surface of the right end wall. Further, the hub shaft 30 has a yoke 37 and a hub 2.
The rotary shaft 42 of the rotor is rotatably supported by a suitable number of bearings 45 independently of each other. The rotor has a rotating shaft 42 and a rotating shaft 42 so as to be installed in the stator 43.
And a commutator 47 fixed to the rotary shaft 42 so as to come into contact with the brush device 44 and receive electricity. A through hole is formed in the right end wall projecting portion 40a of the yoke 37, and the motor power supply lead 48 is drawn out through the through hole. It is desirable that the motor power supply lead 48 is formed in a flat plate shape in cross section so that the outer diameter of the right end wall protrusion 40a of the yoke 37 can be reduced and the small waterproof bearing 38 can be used.

A reduction mechanism 49 for transmitting the rotational driving force of the rotary shaft 42 of the motor to the hub 28 is provided on the rotary shaft 42. As this reduction mechanism 49,
For example, cyclo gear (Sumitomo Heavy Industries, Ltd.) can be used. The output gear of the reduction mechanism 49 and the hub 2
A second ratchet mechanism 50 serving as a freewheel clutch is provided between the inner teeth of the inner peripheral surface portion 8. The second ratchet mechanism 50 connects the speed reducing mechanism 49 and the hub 28 when the bicycle runs by inertia such as going down a slope or when the driven sprocket 29 rotates the hub 28 to run as a normal bicycle. Solve On the other hand, when the hub 28 is rotated by the motor to drive the bicycle as an electric bicycle, the both are connected.

A speed increasing mechanism 51 for transmitting the rotational driving force of the hub 28 to the rotary shaft 42 is also mounted on the rotary shaft 42. As the speed increasing mechanism 51, for example, a planetary gear mechanism can be used. A third ratchet mechanism 52 as a freewheel clutch is also provided between the input gear of the speed increasing mechanism 51 and the inner teeth of the inner peripheral surface of the hub 28. The third ratchet mechanism 52 connects the speed increasing mechanism 51 and the hub 28 when the bicycle runs by inertia such as going down a slope, or when the driven sprocket 29 rotates the hub 28 to run as a normal bicycle. On the other hand, when the electric bicycle is run by rotating the hub 28 with the motor, the connection between the two is released.

In the above structure, when traveling as an ordinary bicycle, the power from the foot pedal 22 is transmitted through the pedal sprocket 26, the chain 25, the driven sprocket 29, and the first ratchet mechanism 35 to the rear wheel hub 28. And the rear wheels are driven. The rotation of the hub 28 is also transmitted to the rotation shaft 42 of the motor via the third ratchet mechanism 52 and the speed increasing mechanism 51, whereby the motor can generate electric power. During this time, the rotating shaft 4 of the motor
Although the reduction gear mechanism 49 is also driven by the rotation of 2, the connection between the output gear of the reduction gear mechanism 49 and the hub 28 is released due to the presence of the second ratchet mechanism 50. Therefore, the pedal 22 can be driven while the electric power is generated by the motor.

On the other hand, when traveling as an electric bicycle, for example, the rotation of the rotating shaft 42 of the motor, which is started by the operation switch (not shown), is supplied to the motor through the reduction mechanism 49 and the second ratchet mechanism 50. It is transmitted to the hub 28, the rear wheels are driven, and the motor can drive the vehicle. The rotation of the hub 28 is not transmitted to the speed increasing mechanism 51 and the driven sprocket 29 due to the existence of the second and third ratchet mechanisms 50 and 52, respectively. Here, ON / OFF of the power supply to the motor and the magnitude of the supplied power are
For example, the output is controlled by the output from the tension sensor 53 as shown in FIG. 1, whereby the motor is automatically turned on when the force of stepping on the pedal 22 on an uphill or the like becomes larger than a predetermined force. Further, the driving force may be changed.

In the above embodiment, the reduction mechanism 4
The second and third ratchet mechanisms 50 and 52 are provided between the output gear 9 and the input gear of the speed increasing mechanism 51 and the inner teeth of the inner peripheral surface of the hub 28, but instead of or in addition to this, deceleration A ratchet mechanism may be provided between each of the input gear of the mechanism 49 and the output gear of the speed increasing mechanism 51 and the rotary shaft 42. Further, between the output gear of the reduction mechanism 49 and the inner teeth of the inner peripheral surface of the hub 28, and between the output gear of the speed increasing mechanism 51 and the rotary shaft 4
A ratchet mechanism may be provided between the two.
In the case where the speed increasing mechanism 51 is configured by the planetary gear train as described above, the structure in which the ratchet mechanism is provided between the output gear of the speed increasing mechanism 51 and the rotating shaft 42 is, for example, a sun gear which is an output gear. The gear is moved through the ratchet mechanism to the rotary shaft 42.
It will be mounted on top.

Further, in the above embodiment, the rotary shaft 42 of the motor is formed in the shape of a hollow shaft and is externally mounted on the hub shaft 30, but instead of this, the mounting shaft fixed to the vehicle body as shown in FIG. The pair of 54 may rotatably support both ends of the rotary shaft 42 of the motor via the bearing 55. In the illustrated example, the right end wall protrusion 40a of the motor yoke 37 is directly supported by the vehicle body frame and serves as a mounting shaft 55a at the right end of the rotary shaft 42. Reference numeral 56 in the figure indicates an annular waterproof seal.

A second ratchet mechanism 52 and a third ratchet mechanism 52 are provided between the speed reducing mechanism 49 and the speed increasing mechanism 51 and the hub 28, respectively.
Instead of providing 50, a connection switching mechanism as shown in FIG. 4 may be provided. In this connection switching mechanism, the outer peripheral tooth portions of the output gear of the speed reducing mechanism 49 and the input gear of the speed increasing mechanism 51 are provided so as to face the inner teeth of the inner peripheral surface of the hub 28 at a predetermined interval. There is. The position where the output gear of the reduction mechanism 49 and the hub 28 are inserted to connect the two, and the reduction mechanism 4 as shown in the drawing.
No. 9 of the output gear and the input gear of the speed increasing mechanism 51 are engaged with each other, and a position where the input gear of the speed increasing mechanism 51 and the hub 28 are inserted to connect the two. A connecting gear 57 is provided. This connecting gear 5
7 is in a state of meshing with the internal teeth of the inner peripheral surface of the hub 28 and rotating integrally, and is movable between the three positions while being guided in the tooth width direction by the internal teeth. Specifically, the sleeve-shaped holder portion 57a that partially protrudes outside the hub 28 is integrated with the inner peripheral surface portion of the opening formed in the end wall of the hub 28 and the hub shaft 30 so as to substantially cover the opening. It is slidably supported in the axial direction of the rotary shaft 42 of the motor by the outer peripheral surface portion of the end wall portion 30a formed at. In addition, a waterproof bearing (not shown) is provided between them and is rotatable. Then, an engaging member 58 having a recess that allows the flange 57b to be formed outside the hub 28 of the holder 57a engages with the flange 57b. Can be moved by, for example, an operation lever (not shown) attached to a handle.

According to the modification of FIG. 4, the connecting gear 57 is moved to a position where it does not engage with any of the output gear of the reduction mechanism 49 and the input gear of the speed increasing mechanism 51.
The hub 28 and the rotary shaft 42 of the motor can be free from each other. Therefore, unlike the above-described embodiment, the free state can be achieved even while the pedal 22 is traveling, so that the vehicle can travel without generating power. Further, in this free state, the vehicle body can be pulled around to move backward without damaging the speed reduction mechanism 49 or the like.

[0020]

According to the invention of claims 1 to 5, the rotation of the rotor of the electric motor is decelerated and transmitted to drive a predetermined rotating body, and the rotation of the rotating body is appropriately accelerated to perform the rotation. A power generation / motor device for transmitting power to a child to generate electric power, in addition to a speed reduction mechanism for transmitting the rotation of the rotor to the rotor, a speed increasing mechanism for transmitting the rotation of the rotor to the rotor. Since the speed reducing mechanism is also used as the speed increasing mechanism during power generation, both the speed increasing mechanism and the speed reducing mechanism can exhibit sufficient performance. There is an effect that a two-wheeled vehicle or a three-wheeled vehicle with an electric motor device can be provided. In particular, according to the invention of claim 5, the connection switching means for switching between connecting the rotor and the rotating body through the speed reducing mechanism or the speed increasing mechanism is provided with the connection switching means via the speed reducing mechanism. In order to obtain a state in which the rotor and the rotating body are connected, a state in which the rotor and the rotating body are connected via the speed increasing mechanism, and a state in which the rotor and the rotating body are mutually free. With this configuration, the rotor and the rotor can be freely rotated independently of each other. Therefore, it is possible to provide the two-wheeled or three-wheeled vehicle in which the two-wheeled or three-wheeled vehicle can be freely routed in such a free state.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a motorized bicycle according to an embodiment.

FIG. 2 is a sectional view of a hub of a rear wheel of the bicycle.

FIG. 3 is a sectional view of a rear wheel hub according to a modification.

FIG. 4 is a cross-sectional view showing a part of a rear wheel hub according to another modification.

[Explanation of symbols]

 10 top tube 11 down tube 12 head tube 14 seat tube 15 chain stay 16 seat stay 18 front hawk stay 19 hawk crank 22 pedal 25 chain 26 pedal sprocket 27 fixed support plate 28 fixed shaft 29 driven sprocket 28 hub 42 rotary shaft 49 reduction mechanism 51 speed increasing mechanism 50 second ratchet mechanism 52 third ratchet mechanism

Claims (5)

[Claims] 1. A generator / motor device for decelerating and transmitting rotation of a rotor of an electric motor to drive a predetermined rotating body, and at the same time, speeding up the rotation of the rotating body to transmit to the rotor to generate electric power. In addition to the deceleration mechanism for transmitting the rotation of the rotor to the rotor, a speed increasing mechanism for transmitting the rotation of the rotor to the rotor is also provided. apparatus. 2. A connection switching means for switching between connecting the rotor and the rotating body via either the speed reducing mechanism or the speed increasing mechanism.
Electric power generation and combined use electric motor device. 3. A two-wheeled or three-wheeled vehicle equipped with a power-generator / motor device according to claim 1 in a hub of an axle, wherein the speed-reduction mechanism and the speed-increasing mechanism are provided in the hub. A freewheel clutch capable of transmitting drive only from the rotary shaft to the hub via a mechanism, and a freewheel clutch capable of transmitting drive only from the hub to the rotary shaft via the speed increasing mechanism. A two-wheeled or three-wheeled vehicle with an electric motor device that also serves as a generator. 4. A two-wheeled or three-wheeled vehicle equipped with a power-generator / motor device according to claim 2 in a hub of an axle, wherein said hub and said speed-reduction mechanism and said speed-increasing mechanism are connected in said hub. A two-wheeled or three-wheeled vehicle with a power-generator / motor device, characterized in that a switching mechanism portion of a switching means is provided. 5. A state in which the connection switching means connects the rotor and the rotating body via the speed reduction mechanism, and a state in which the rotor and the rotating body are connected via the speed increasing mechanism. The two-wheel or three-wheel vehicle with a power-generator / motor device according to claim 4, wherein the rotor and the rotor are configured to be free from each other.