JPH07156856A - Electric motor-driven bicycle - Google Patents

Abstract

PURPOSE:To travel by using respectively and selectively stepping force of a pedal, driving force of an electric motor and both of these, and move a stopping bicycle forward and backward by manual operation by arranging a DC electric motor being a driving source, a speed changer, an on-vehicle storage battery or the like. CONSTITUTION:When a rotary shaft 34a of an electric motor 34 rotates forward, a gear 40 is inversely rotated through a one-way clutch 42a and a gear 42, and a sprocket 25 fixed to a rotary shaft 38a is also inversely rotated. At this time, a gear 39 meshing with a gear 41 moves slidingly, and transmission of torque to the gear 40 is checked. On the other hand, when the rotary shaft 34a rotates inversely, since the one-way clutch 42a moves slidingly, rotational torque of the gear 42 is not generated. At this time, the gear 40 rotates inversely, and also drives the sprocket 25 in the same direction. Driving torque of a rear wheel is changed by the sprocket 25 through a chain. By the way, when a disk 53 is rotated by manual operation and is moved rightward, the sprocket 25 is loosened, and moves slidingly with the output rotary shaft 38a, so that a bicycle can be moved forward and backward by manual operation.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] It is used in addition to a well-known foot-operated bicycle and an electric bicycle that can be advanced by the driving force of a DC motor.

2. Description of the Related Art An electric bicycle in which a DC electric motor and a storage battery are mounted on a pedal-pedaled bicycle is well known, and there is an example in which the bicycle is implemented.

[0002]

[Problems to be Solved by the Invention]

The first problem is to construct an electric bicycle by suppressing the change of the conventional bicycle mechanism to the minimum extent. Second Problem It is necessary to prevent a change in running sensation without causing a load on the DC motor and its speed reducer when traveling by a pedal. Third Problem It is necessary to be able to climb a slope using both the pedaling pedal and the driving force of the DC motor. Fourth Problem There is a special manual operation when changing and selecting the first mode in which the vehicle is driven only by the driving force of the DC motor, the second mode in which only the pedaling pedal is used, and the third mode in which both are used in combination. It is difficult to use, and there is a problem that induces an accident especially in the case of small children. Fifth task It is necessary to be able to push the bicycle and move backward freely when the bicycle is stopped.

[0003]

[Means for Solving the Problems] First Means A large sprocket driven by a one-way clutch by a foot pedal, a small sprocket driving a rear wheel shaft through a one-way clutch, and the large sprocket described above. In a bicycle provided with a chain hung between a small sprocket and a small sprocket, an in-vehicle storage battery housed in a first outer casing fixed to a vehicle body at a lower portion of a saddle of the bicycle and a second outer casing fixed to the lower portion. , A transmission driven by an output rotary shaft of the DC motor, a first sprocket mounted on the output rotary shaft of the transmission via a one-way clutch, and rotatably supported on the side thereof. Second sprocket, the lower outer circumference of the large sprocket and the first sprocket, the upper outer circumference of the second sprocket, and the small sprocket The drive device that drives the rear wheels in the direction to move the bicycle forward by the chain that is stretched between the two, and the first gear that is driven by the output rotation shaft of the DC motor when the DC motor rotates in the forward direction. The output rotation shaft of the transmission is driven through the clutch in a mode with a small gear ratio, and when the DC motor is rotated in the reverse direction, the second gear train driven by the output rotation shaft drives the output rotation shaft through the second one-way clutch. A device that drives the output rotation shaft of the transmission in the same direction in a mode with a large gear ratio, an on-vehicle storage battery that supplies power to the DC motor via an opening / closing electric switch, an armature current detection device for the DC motor, and the device and the DC motor. Power supply from a vehicle-mounted storage battery and a flywheel diode that is reversely connected in parallel to the series connection body of the variable resistor, and by changing the resistance value of the variable resistor, The reference voltage and the detection voltage of the armature current detection device are compared with an electric circuit that obtains a quasi-voltage, and when the latter voltage exceeds the former voltage, the transistor inserted between the DC motor and the onboard storage battery becomes non-conductive. In response to rotation, the chopper circuit that turns on the transistor when the armature current drops to a predetermined value and the variable resistance housed inside is changed by manually turning the handle grip. To increase the reference voltage, and to release the reference voltage by springing back when the hand is released from the grip, a means for rotating the DC motor forward and backward, and manually rotating the first sprocket with respect to the output rotary shaft. It is composed of means for enabling left and right rotation. Second Means: A large sprocket driven by a one-way clutch by a foot pedal, a small sprocket driving a rear wheel shaft by a one-way clutch, and the large sprocket and the small sprocket described above. In a bicycle equipped with a chain, a vehicle-mounted storage battery housed in a first casing fixed to the vehicle body at the lower part of the saddle of the bicycle, a DC motor housed in a second casing fixed to the lower part, and its output rotation A reduction gear driven by a shaft, a first sprocket mounted on an output rotation shaft of the reduction gear via a one-way clutch, and a second sprocket rotatably supported on a side portion thereof. A chain hung between the lower outer circumference of the large sprocket and the first sprocket, the upper outer circumference of the second sprocket, and the small sprocket. A drive device that drives the rear wheels in the direction in which the bicycle moves forward, a device that manually changes the reduction ratio between the small sprocket and the rotation axis of the rear wheels, and an on-vehicle device that supplies power to the DC motor via an opening / closing electric switch. Storage battery,
The armature current detection device of the DC motor and the flywheel diode reversely connected in parallel to the series connection body of the device and the DC motor, and the power supply from the onboard storage battery, change the resistance value of the variable resistor to cope with this. The reference voltage and the detection voltage of the armature current detector are compared with the electric circuit that obtains the changed reference voltage, and when the latter voltage exceeds the former voltage, it is inserted between the DC motor and the onboard storage battery. When the transistor is turned off and the armature current drops to a predetermined value, the chopper circuit that turns on the transistor and the variable resistor housed inside are changed by manually turning the handle grip. The device that increases the reference voltage in response to rotation, and springs back when the hand is released from the grip to eliminate the reference voltage. Those constructed more with means making it possible to perform the rotation of the left and right freely relative to the output rotation axis 1 of the sprocket.

[0004]

The pedal has the function of adding a device for carrying out the following action to a known bicycle which moves forward by the pedaling pedal and stops when it is stopped, and has the action of operating the bicycle without changing the driving feeling. When a part of the grip of the steering wheel is rotated, the driving torque of the DC motor is increased in accordance with the rotation angle, and the vehicle travels. This traveling can be used in combination with the traveling with the pedal pedal, or can be performed independently. . When the hand is released from a part of the handle grip, the springback occurs, the output torque from the DC motor is automatically lost, and the vehicle travels due to inertia to increase the traveling distance. It is possible to configure the electric bicycle by using only the additional member while minimizing the change in the configuration of the conventional bicycle. It is necessary to manually retract the bicycle while it is stopped, but at this time it is possible to freely retract by manually operating the lever. Because of the above-described effects, the first, second, ..., Fifth problems can be solved.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a drawing in which the device of the present invention is added to a bicycle, and other known parts are omitted and not shown. Dotted line 2
Reference numerals 4a, 24b, 24c and 24d are schematic representations of the triangular frame of the bicycle body. The arrow C indicates the traveling direction.
Foot pedals 3a, 3b are rotating arms 2a, 2b
Is supported by a support shaft at its end, and the arm 2a is linearly held by the support body, and the arm 2b is also held linearly by the support body of the same structure via the rotary shaft 1. The rotating shaft 1 of the arms 2a, 2b is rotatably supported by a bearing in a joint portion of the frames 24a, 24b, 24e, and the sprocket 6 having a large diameter is synchronously rotated via the arms 2a, 2b and the one-way clutch 1a. To be configured. Frames 24a, 24c
A hub of a rear wheel 10 is rotatably supported on a support shaft 5 of the coupling portion of the bearing via a bearing, and a sprocket 8 having a small diameter is mounted on the hub. When the petal 3a is pressed in the direction of arrow A to rotate the sprocket 6 in the direction of arrow B, the chain 4 hooked on the sprocket 6 and the sprocket 8 causes the sprocket 8 to rotate counterclockwise.

At this time, since the rear wheels 10 are also driven in the same direction, the bicycle runs in the direction of arrow C. One-way clutch when the petals 3a and 3b are stopped and held
Slides and the bicycle runs by inertia due to inertia. Symbol 2
Reference numeral 4 is a saddle and reference numeral 6a is a luggage carrier. Symbol 9 is the outer casing,
A three-phase coreless flat DC motor (to be referred to as an electric motor hereinafter) and a speed reducer for the same are housed in this inside. The outer casing 9 is fixed to the frames 24b and 24c. The outer casing 6 for accommodating the onboard storage battery is also the frame 24c and the loading platform 6
It is fixed below b. Chain 4 is sprocket 6,
25,7,8, as shown in the figure, Petal 3
The bicycle travels in the direction of arrow C by rotating a and 3b by stepping in the direction of arrow B. Next sprocket 2
Details of 5 and 7 will be described.

In FIG. 2, a DC motor is housed in the outer casing 9, and the output of the DC motor is transmitted through a reduction gear to the output rotary shaft 2
5a is driven, and the sprocket attached to this is also driven. The sprocket 7 is rotatably supported by a support shaft 7a provided on the outer casing 9, and the chain 4 is hung on both as shown. The speed reducer described above has two means. The first means is a means for automatically changing the reduction ratio by the forward and reverse rotation of the electric motor, and the second means is a constant reduction ratio. The second means is to use a known reduction gear. The first means will be described below with reference to FIG.

In FIG. 3, a three-phase coreless flat commutator motor is used as the motor 34. As the electric motor 34, a well-known electric motor described in Japanese Patent Publication No. 58-26264 according to the invention of the present applicant is used, and an output of about 200 watts is an optimum output in balance with the size of the storage battery. A reluctance type electric motor that is small and has a large output torque can also be used. The output rotary shaft 34a of the electric motor 34 is rotatably supported by a ball bearing 37a of the outer casing 35.
Since the rotating shaft 34a is supported by the bearings on both sides of the electric motor 34, the ball bearing 37a is not always necessary. A gear 42 is attached to the rotary shaft 34a via a one-way clutch 42a. The one-way clutch 42a uses a roller. The gear 41 is fixed to the rotating shaft 34a. The left side of the outer casing 35 is fixed to the outer casing of the electric motor 34. A rotating shaft 38b is rotatably supported by a bearing provided on the protruding portion 37 of the outer casing 35 and a bearing provided on the left side of the outer casing 35, a gear 39 is fixed to the rotating shaft 38b, and a gear 43 is 1 It is attached to the rotary shaft 38b via a directional clutch.

Ball bearings 37b, 3 on the left and right sides of the outer casing 35
A rotating shaft 38a is rotatably supported by 7c, and a gear 40
And the sprocket 25 is fixed. Gear 40 and gear 43
Mesh with each other, and the gear 40 also meshes with the gear 42. Gear 39
Mesh with the gear 41. Next, FIG. 4 which is a plan view of each gear as seen from the direction of arrow G for torque transmission by the gears described above will be described. In FIG. 4, when the rotary shaft 34a of the electric motor rotates in the clockwise direction of the arrow, the gear 40 is rotated in the counterclockwise direction of the arrow via the one-way clutch 42a and the gear 42, so that the sprocket 25 fixed to the rotary shaft 38a is not rotated. Drive in the direction. At this time, the gear 39 meshing with the gear 41 rotates counterclockwise, and the coaxial gear 43 also receives the driving force that rotates in the same direction, but the gear 39 slides because it becomes the driving force via the one-way clutch. Torque transmission to 40 is blocked. Since the gear 43 meshes with the gear 40, it rotates clockwise, but only slides because of the one-way clutch 42a described above.

When the rotating shaft 34a of the electric motor rotates in the reverse direction and rotates in the counterclockwise direction, the one-way clutch 42a slides to cause no rotation torque of the gear 42. The gear 41 rotates counterclockwise, and the gear 39 meshing with the gear 41 rotates clockwise. Since the rotating shaft 38b also rotates in the same direction, the gear 43 also rotates clockwise through the one-way clutch. The gear 40 meshing with the gear 43 rotates counterclockwise (indicated by an arrow), and drives the sprocket 25 fixed to the rotation shaft 38a in the same direction. As can be understood from the above description, the sprocket 25 is driven by the gears 42, 40 at a predetermined reduction ratio when the electric motor 34 rotates in the normal direction, and the sprocket 25 is driven by the gears 41, 39, 43, 40 at a larger reduction ratio during the reverse rotation. Are driven in the same direction. That is, it is possible to obtain an automatic speed reducer in which the speed reduction ratio is automatically changed by the forward and reverse rotation of the electric motor 34. Such a speed reducer can provide an effective means when a power source for moving backward is not required like an electric bicycle. As described with reference to FIG. 1, since the chain 4 is hooked on the sprocket 25, the drive torque of the rear wheel 10 can be automatically changed by the forward / reverse rotation of the electric motor 34.

The same effect can be obtained by removing the one-way clutch of the gear 43 in FIG. 4 and providing it on the gear 39 or the gear 41, but in this case, the speed at which the gear idles increases, which causes a drawback of increasing noise. is there. When the energization of the electric motor 34 is stopped, the above-described one-way clutch can slide to perform inertial traveling, so that the power consumption can be reduced to about 1/2. A suitable three-phase flat commutator motor is suitable for the motor 34. The reason is as follows. Since the armature coil rotates and there is no core,
There is no iron loss and the efficiency is 90% or more. Light weight and low price. Even in the commutator type, the inductance of the armature coil is remarkably small, and therefore the combustor and the brush are less likely to burn off and the service life is long. Further, there is an effect that the right and left bulges of the automobile are reduced.

Next, the energizing means of the electric motor 34 will be described with reference to FIG. In FIG. 5, symbols 12a and 12b are positive and negative electrodes of the on-vehicle storage battery. The motor 34 and the resistor 13a for detecting the armature current are connected in series, and the flywheel diode 15 is connected in parallel to the series connection body of the motor 34 and the resistor 13a. The variable resistor 13 and the resistor 13b are connected in series and are supplied from the positive and negative electrodes 12a and 12b. When the armature current increases and the voltage drop of the resistor 13a exceeds the voltage drop of the resistor 13b, the output of the operational amplifier 14 serving as a comparison circuit becomes low level, and the transistor 16 is turned off. The transistor 16 may be another semiconductor switching element. Therefore, the magnetic energy of the armature coil is discharged through the diode 15 and the armature current is reduced.
When it decreases to a predetermined value, the output thereof is converted to a high level due to the hysteresis characteristic of the operational amplifier 14, so that the transistor 16 becomes conductive and the armature current increases. Since the chopper circuit repeats such a cycle, the resistor 13b
Voltage drop, that is, the armature current corresponding to the reference voltage.
In this embodiment, the armature current detecting device using the resistor 13a is used, but well-known means may be used.

Since the voltage drop of the resistor 13b can be controlled by changing the resistance value of the variable resistor 13, the motor 34
Output torque can be controlled by the variable resistor 13. Next, the means for changing the variable resistor 13 will be described with reference to FIGS. FIG. 7 shows the grip of the handle, and the grip of the handle arm 18 is divided into two.
7a is fixed to the handle arm 18, and the grip 17b
Is manually rotatable around the handle arm 18. At the left end of the grip 17b, a cylindrical housing 19 accommodating a member including the variable resistor 13 is provided, and the central portion of the left side plate is fixed to the handle arm 18. A plan view of FIG. 7 viewed from the direction of arrow D is shown in FIG. The housing 19 is shown in cross section.

In FIG. 8, a hollow handle arm 18
A sleeve 21a is arranged so as to be slidably rotatable around the sleeve 21a, and a cylindrical rotating body 21 which is an extension of the grip 17b (shown in FIG. 7) on the left side is fixed to the outside of the sleeve 21a. Rotate synchronously. Rotating body 21
A film of a resistor is applied to the outer peripheral surface of the (insulator).
Slider 20 whose base is fixed inside a cylindrical housing 19
Slides on the above-mentioned film. The left end of the metal spring 22 is fixed to the outside of the rotating body 21, and the right end thereof is the housing 19.
Is fixed inside, and repels the rotating body 21 counterclockwise,
The protrusion 22b of the rotating body 21 and the protrusion 22a of the housing 19 are in contact with each other to prevent rotation.

When the grips 17a and 17b shown in FIG. 7 are gripped with a hand and the grip 17b is rotated, the rotating body 21 shown in FIG. 8 rotates clockwise, so that the terminals 23a and 2 are correspondingly connected.
The resistance value of 3b decreases. This is terminal 23a, slider 2
This is because the resistance value between 0 and the left end of the spring 22 decreases. When the hand is released from the grip 17b, the rotating body 21 springs back to the position shown in the figure, so that the resistance becomes the maximum value. This variable resistor is the variable resistor 13 in FIG. As can be understood from the above description, when the power switch 12c of FIG. 5 is closed, a small amount of current flows through the electric motor 34, but when the grip 17b of FIG. 7 is manually rotated, it corresponds to the rotation angle of FIG. The voltage drop of the resistor 13b, that is, the reference voltage increases, the armature current increases in proportion to this, and the output torque increases. Therefore, the required output torque can be obtained by operating the hand that holds the steering wheel while running.
It is possible to obtain the effect that the traveling of the bicycle can be controlled at a required speed. When the hand is released from the grip 17b, spring back occurs and the output torque almost disappears.

The open / close electric switch 12c in FIG. 5 is manually opened / closed, but it is more effective if it is automated as shown in FIG. 9 shows the protrusions 22a and 22b of FIG.
Only the neighborhood of is shown. In FIG. 9, the protruding portion 22a
Is made of a plastic material, the base is fixed to the housing 19, and the right end of the metal leaf spring 29 is the outer housing 19 and the protruding portion 22a.
Stuck to. The right end of the leaf spring 29 becomes the terminal 29a,
An electrical contact 29b is provided on the left side. The metal plate 30 is embedded in the central portion of the protruding portion 22a and the right end serves as the terminal 30a. The left end is the electrical contact 30b, and the electrical contacts 29b, 3
0b is pressed. When the rotating body 21 rotates counterclockwise and springs back, the protruding portion 22b becomes the leaf spring 2.
9 presses the end surface of the bent portion at the left end of 9 to make electrical contacts 29b, 30
Separate b. The terminals 29a and 30a can be used as the electric switch 12c in FIG. With the above configuration, when the grip 17b is manually rotated, the output torque of the electric motor 34 is increased, and when the grip 17b is released, the rotor 21 springs back to automatically open the electric switch 12c in FIG. Is stopped. Therefore, it is possible to prevent the on-vehicle storage battery from being consumed when the bicycle is left unattended.

In FIG. 5, changeover switches K and L are forward / reverse changeover switches of the electric motor 34, and the electric motor 34 is normally rotating in the illustrated mode. Q of the flip-flop circuit 26
When there is a high-level output from the terminal, the electromagnetic plunger 27 is driven through the amplification circuit 26a, and the changeover switches K and L are switched by the drive of the actuator, so that the energization direction of the electric motor 34 is reversed and the rotation is reversed. . When the output of the Q terminal disappears, the actuator springs back and the changeover switch K,
L returns to normal rotation. The forward / reverse rotation of the electric motor 34 changes the gear ratio of the drive system as described above with reference to FIG.
The resistors 28, 28a, 28b are connected in series. When the output torque of the electric motor 34 is increased by rotating the grip on a slope, the voltage drop of the resistor 13a, that is, the input voltage of the + terminal of the operational amplifier 14a becomes larger than the voltage drop of the resistors 28a and 28b, that is, the input voltage of the-terminal of the operational amplifier 14a. So
The output of the operational amplifier 14a becomes high level, the output of the Q terminal of the flip-flop circuit 26 is converted to high level, and the electric motor 34 is held in the reverse rotation mode.

At this time, the input voltage (voltage drop of the resistor 28b) at the + terminal of the operational amplifier 14b is smaller than the input voltage (voltage drop of the resistor 13a) at the-terminal, so the operational amplifier 14
The output of b is held at low level. If the armature current is reduced by restoring the grip rotation on a flat road,
The voltage drop of the resistor 13a becomes small, and the operational amplifier 14a
Output becomes low level, and when the voltage drop of the resistor 13a becomes smaller than the voltage drop of the resistor 28b, the operational amplifier 14
The output of b becomes high level, and the flip-flop circuit 2
The output of 6 is inverted and the output of the Q terminal becomes low level.
Therefore, the actuator of the electromagnetic plunger 27 is restored and the motor 3
4 returns to normal. As can be understood from the above description, in the initial rotation of the grip 17b in FIG.
4 can be normally rotated to increase or decrease the output torque, and when the output torque is made larger than the set value, the output of the operational amplifier 14a is converted to a high level, so that the electric motor 34 is reversely rotated and the gear ratio is increased to climb a slope. You can As can be understood from the above description, there is an effect that the drive torque of the wheels of the electric bicycle can be automatically changed as needed. Instead of the changeover switches K and L, a well-known transistor bridge circuit can be used to perform forward / reverse rotation of the electric motor 34. The value of the resistor 28a may be zero, but may be determined by an actually measured value that gives a good driving feeling.

It is also possible to remove the control circuit including the operational amplifiers 14a and 14b and change the gear ratio by using the push button switch 31a. The push button switch 31a is provided in a part of the grip 17a of FIG. 7, and when it is pressed and held, the + terminal 31 energizes the electromagnetic plunger 27 to switch the changeover switches K and L to reverse the electric motor 34. , When the push button switch 31a is released, the electric motor 34 rotates normally. Therefore, the gear ratio can be manually adjusted as needed, so that the object of the present invention can be achieved. As can be understood from the above-mentioned configuration, since there is a one-way clutch 42a and a one-way clutch mounted on the gear 43, when the bicycle is manually pushed to move backward, the gears shown in FIG. There is an inconvenience that 10 is locked and cannot move backward. A means for solving the above-mentioned problems is shown in FIG.

In FIG. 3, a metal disk 51 is fixed to the right end of the output rotary shaft 38a, the sprocket 25 is loosely fitted, and the sprocket 25 is supported so as to slide with the rotary shaft 38a. A spiral groove is provided at the right end of the output rotary shaft 38a as shown by a symbol 38c, and the disc 53 is screwed into the disc 53 to be screwed.
When the disc 53 is rotated via the outer peripheral projections 53a and 53b, the disc 53 advances to the left and the sprocket 25 is pressed against the disc 51. Since the rubber plate 51a is adhered to the right side surface of the disc 51, the output rotation shaft 38a and the sprocket 25 rotate synchronously due to the frictional force.

With the above construction, the output rotary shaft 38 shown in FIG.
The rotation of a drives the rear wheels 10 to move the bicycle forward. When the disc 53 of FIG. 3 is manually rotated and moved to the right, the sprocket 25 loosens and the output rotation shaft 38
The bicycle can be manually moved back and forth because it is converted into a mode in which it slides with a. The alternative selecting means for fixing or sliding the sprocket 25 and the rotary shaft 38a can be used by means other than the above-mentioned embodiment.

Next, the second means of the speed reducer for the electric motor housed in the outer casing 9 of FIG. 2 will be described. Although the speed reducer of the outer casing 9 is a speed reducer using a known gear, the speed reducer of the speed reducer is set so that the outer peripheral speed of the sprocket 25 in FIG. 2 exceeds the maximum traveling speed of the chain 4 when the petal is rotated by the foot. Is set. In the case of this embodiment, the rear wheel 10
The hub is provided with a device capable of manually decelerating the rotation of the sprocket 8 and changing the reduction ratio for driving the rear wheels 10. Therefore, when climbing a slope, it is possible to climb manually by manually changing to the required reduction ratio. At this time, the force of stepping on the petal is also added. The speed reducer described above is generally configured to be changed to a plurality of stages, but may be configured to be continuously changed in a stepless manner. The means of the present invention can be applied to both of the above.

The effect of using a reluctance type electric motor as the electric power source of the drive source will be described. FIG. 6 shows a torque characteristic of the reluctance type electric motor, which is shown by a curve 32. The horizontal axis is the current flowing, and the vertical axis is the output torque. As the current increases, the torque increases on the quadratic curve and then increases linearly until the armature coil burns out. In the known DC motor, the maximum torque is obtained in the vicinity of the dotted line 32a where the magnetic pole is magnetically saturated. In the case of a reluctance type electric motor, since there is no saturation point described above, the same type of output torque is about 10 times higher. However, since the armature coil is burnt out, it is effective to adopt the following means.
When the electric switch 12c of FIG. 5 is closed to drive the bicycle, the charging current of the capacitor 33 causes the transistor 1
6 is conductive, the maximum current is supplied to the electric motor 34 without being affected by the chopper circuit by the operational amplifier 14, the base current of the transistor 16 disappears as the capacitor is charged, and the chopper circuit is supplied. Therefore, it becomes an effective means when the bicycle is rapidly accelerated by the electric motor. The high resistance placed in parallel with the capacitor 33 is the electric switch 12c.
Is for discharging the capacitor 33 when opened, and for accelerating rapidly when closed.

As can be seen from the above description of each embodiment, the object of the present invention can be achieved. Although the above embodiment is for a two-wheeled vehicle, the present invention can be implemented by the same means even for a three-wheeled bicycle having two rear wheels. Especially for elderly bicycles, a three-wheeled bicycle is an effective means.

[0025]

The device of the present invention has an effect that an electric bicycle can be manufactured by only adding necessary members without significantly changing the structure of the bicycle. As can be understood from the above description, it is possible to obtain a means for traveling by using only the leg force of the petal, a means for traveling by using an electric motor, and a means for traveling both together, and stop each means. Then, the vehicle can run due to inertia. When traveling by inertia, it is possible to double the traveling distance by inertial traveling on a flat ground and a downhill. The operation can be facilitated because it can be converted to the inertial traveling mode simply by releasing the hand from the grip 17b. The gear ratio can be changed by manually operating the electric switch. Further, since the gear ratio can be automatically changed by increasing or decreasing the output torque, the gear ratio can be automatically changed when traveling on a flat road and an uphill, so that the traveling speed can be easily controlled. There is an effect that the selecting means for alternation and combined use of the leg force and the torque by the electric motor and the inertial traveling are adapted to the natural movement of a human and the traveling by the electric bicycle can be easily performed.
Since the stopped bicycle can be manually moved forward and backward, the direction of the stopped bicycle can be freely changed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a device of the present invention.

FIG. 2 is an explanatory diagram of the outer casing 9.

FIG. 3 is an explanatory diagram of an electric motor and its transmission.

FIG. 4 is an explanatory diagram of meshing of gears 41, 42, 43, 39, 40.

FIG. 5 is a circuit diagram of a motor energization control.

FIG. 6 is a graph of electric current and torque of the electric motor.

FIG. 7 is an explanatory view of a grip

FIG. 8 is an explanatory diagram of the internal configuration of the grip.

FIG. 9 is an explanatory diagram of a configuration of protrusions 22a and 22b.

[Explanation of symbols]

 24a, 24b, ..., 24e Frames 2a, 2b, 3a, 3b Foot pedals 4 Chain 24 Saddle 6a Packing box 6 Battery outer casing 9 Motor and transmission outer casings 6, 7, 8, 25 Sprockets 10 Rear wheels 5 Spindles 1a , 42a One-way clutch 34 Three-phase coreless flat motor 6 In-vehicle storage battery 35 Transmission device 37a, 37b, 37, 37c Bearing 39, 40, 41, 42, 43 Gears 34a, 38a, 38b Rotating shaft 17a, 17b Grip 18 Handle arm 19 Enclosure 20 Slider 21a Sleeve 21 Rotating body 22a, 22b Projection 22 Spring K, L changeover switch 27 Electromagnetic plunger 29b, 30b Electrical contact 29a, 30a Terminal 29 Leaf spring

[Procedure amendment]

[Submission date] February 21, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

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[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

[0003]

[Means for Solving the Problems] First Means A large sprocket driven by a foot pedal through a one-way clutch, a small sprocket driving a rear wheel shaft through a one-way clutch, and the large sprocket described above. In a bicycle having a small sprocket and a chain hung between the small sprocket and the bicycle, a vehicle-mounted storage battery housed in a first outer casing fixed to the vehicle body at a lower portion of a bicycle saddle and a second outer casing fixed to the lower portion. , A transmission driven by an output rotary shaft of the DC motor, a first sprocket mounted on the output rotary shaft of the transmission via a one-way clutch, and rotatably supported on the side thereof. A second sprocket, a lower outer circumference of the large sprocket and the first sprocket, an upper outer circumference of the second sprocket, and a small sprocket. A driving device for driving the rear wheels in a direction to advance the bicycle by multiplying passed chain between, at the time of forward rotation of the DC motor, the first gear train driven by the output rotary shaft, the first
The output rotary shaft of the transmission is driven through the one-way clutch in the mode with a small gear ratio, and when the DC motor is rotated in reverse,
With the second gear train driven by its output rotary shaft,
A device for driving the output rotation shaft of the transmission in the same direction in a mode having a large gear ratio via the second one-way clutch, an on-vehicle storage battery for supplying power to the DC motor via an opening / closing electric switch, and an armature for the DC motor. A current detection device, a flywheel guid reversely connected in parallel to a series connection body of the device and a DC motor, an electric circuit supplied from an onboard storage battery to obtain a reference voltage, and detection of the reference voltage and the armature current detection device Comparing the voltages, when the voltage of the latter exceeds the voltage of the former, the transistor inserted between the DC motor and the vehicle-mounted storage is made non-conductive, and when the armature current drops to a predetermined value, the chopper is made conductive. By manually rotating the circuit and the grip of the handle, the reference voltage is increased in response to the rotation, and when the hand is released from the grip, spring back is performed. It is composed of a device for extinguishing the voltage, a means for reversing the direct-current motor, and a means for manually rotating the first sprocket freely left and right with respect to the output rotation shaft. Second Means: A large sprocket driven by a one-way clutch by a foot pedal, a small sprocket driving a rear wheel shaft by a one-way clutch, and the large sprocket and the small sprocket described above. In a bicycle equipped with a chain, a vehicle-mounted storage battery housed in a first outer casing fixed to a vehicle body at a lower portion of a saddle of the bicycle, a DC motor housed in a second outer casing fixed to the lower portion, and its output rotation A reduction gear driven by a shaft, a first sprocket and an output rotary shaft of the reduction gear mounted through a one-way clutch. A second sprocket rotatably supported on its side, and a chain hung between the lower outer circumference of the large sprocket and the first sprocket, the upper outer circumference of the second sprocket, and the small sprocket. A drive device for driving the rear wheels in the direction of moving the bicycle forward by means of, a device for manually changing the reduction ratio between the small sprocket and the rotating shaft of the rear wheels, and a DC motor supplied with electricity via an opening / closing electric switch. An on-vehicle storage battery, a DC motor armature current detection device, and a flywheel diode connected in parallel to a series connection body of the device and the DC motor, an electric circuit supplied from the on-vehicle storage battery to obtain a reference voltage, and a reference voltage. The detection voltage of the armature current detection device is compared, and if the latter voltage exceeds the former voltage, the transistor inserted between the DC motor and the onboard storage battery is When the armature current drops to a predetermined value after being turned on, the chopper circuit that turns on the transistor and the handle grip are manually rotated to increase the reference voltage in response to the rotation. It is composed of a device that springs back to eliminate the reference voltage when the hand is released, and a device that allows the first sprocket to freely rotate left and right with respect to the output rotation shaft. .

Claims (2)

[Claims] 1. A large sprocket driven by a foot pedal through a one-way clutch, a small sprocket driving a rear wheel shaft through a one-way clutch, and a large sprocket mounted between the large sprocket and the small sprocket. In a bicycle equipped with a chain, a vehicle-mounted storage battery housed in a first outer casing fixed to the vehicle body at the lower part of the saddle of the bicycle, and a DC motor housed in a second outer casing fixed to the lower part, and the same. A transmission driven by the output rotary shaft, a first sprocket mounted on the output rotary shaft of the transmission via a one-way clutch, and a second sprocket rotatably supported on the side thereof. A chain spanned between the lower outer circumference of the large sprocket and the first sprocket, the upper outer circumference of the second sprocket, and the small sprocket. The drive device for driving the rear wheels in the direction to further advance the bicycle and the first gear driven by the output rotation shaft of the direct-current motor at the time of normal rotation of the DC motor have a small gear ratio via the first one-way clutch. The output rotation shaft of the transmission is driven in the mode, and when the DC motor is rotated in the reverse direction, the transmission is driven by the second gear train driven by the output rotation shaft in the mode in which the gear ratio is large through the second one-way clutch. A device for driving the output rotation shaft of the same in the same direction, an on-vehicle storage battery that supplies power to the DC motor through an opening / closing electric switch, an armature current detection device for the DC motor, and a reverse connection in parallel with the series connection body of the device and the DC motor. The connected flywheel diode and the electric circuit that is supplied from the onboard storage battery and that changes the resistance value of the variable resistor to obtain the reference voltage that is changed corresponding to this. The voltage is compared with the detection voltage of the armature current detection device, and if the latter voltage exceeds the former voltage, the transistor inserted between the DC motor and the onboard storage battery is converted to non-conduction, and the armature current reaches the specified value. When the handle is turned down, the chopper circuit that makes the transistor conductive and the variable resistance housed inside is changed by manually turning the grip of the handle to increase the reference voltage in response to the turning. A device that springs back to eliminate the reference voltage when the hand is released further, a means that reverses the direct current motor, and a first sprocket that can be freely rotated left and right with respect to the output rotation shaft. An electric bicycle comprising: 2. A large sprocket driven by a foot pedal through a one-way clutch, a small sprocket driving a rear wheel shaft through a one-way clutch, and a large sprocket mounted between the large sprocket and the small sprocket. In a bicycle equipped with a chain, a vehicle-mounted storage battery housed in a first housing fixed to the vehicle body at the lower part of the saddle of the bicycle, and a DC motor housed in a second housing fixed to the lower part and its output A speed reducer driven by a rotary shaft, a first sprocket mounted on an output rotary shaft of the speed reducer via a one-way clutch, and a second sprocket rotatably supported on a side portion thereof, On the chain hung between the large sprocket, the lower outer circumference of the first sprocket, the upper outer circumference of the second sprocket, and the small sprocket. A drive device that drives the rear wheels in the direction in which the bicycle moves forward, a device that manually changes the reduction ratio between the small sprocket and the rotation axis of the rear wheels, and an on-vehicle device that supplies power to the DC motor via an opening / closing electric switch. Storage battery,
The armature current detection device of the DC motor and the flywheel diode reversely connected in parallel to the series connection body of the device and the DC motor, and supplied from the in-vehicle storage battery, corresponding to this by changing the resistance value of the variable resistor The reference voltage and the detection voltage of the armature current detection device are compared with the electric circuit that obtains the changed reference voltage, and when the latter voltage exceeds the former voltage, it is inserted between the DC motor and the onboard storage battery. When the transistor is turned off and the armature current drops to a predetermined value, the chopper circuit that turns on the transistor and the variable resistor housed inside are changed by manually turning the handle grip. The device that increases the reference voltage in response to rotation, and springs back when the hand is released from the grip to eliminate the reference voltage. Electric bicycle, characterized in that it is more configured with means making it possible to perform the rotation of the left and right freely one of the sprocket relative to the output rotation axis.