JP2011143752A - Power assisted bicycle - Google Patents

Power assisted bicycle Download PDF

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Publication number
JP2011143752A
JP2011143752A JP2010004131A JP2010004131A JP2011143752A JP 2011143752 A JP2011143752 A JP 2011143752A JP 2010004131 A JP2010004131 A JP 2010004131A JP 2010004131 A JP2010004131 A JP 2010004131A JP 2011143752 A JP2011143752 A JP 2011143752A
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JP
Japan
Prior art keywords
electric motor
rotor
motor
assist
bicycle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2010004131A
Other languages
Japanese (ja)
Inventor
Takayuki Fukui
Satoshi Takefushi
Munehiro Yoshino
宗洋 吉野
隆幸 福井
敏 竹節
Original Assignee
Chuo Bussan:Kk
株式会社中央物産
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Application filed by Chuo Bussan:Kk, 株式会社中央物産 filed Critical Chuo Bussan:Kk
Priority to JP2010004131A priority Critical patent/JP2011143752A/en
Publication of JP2011143752A publication Critical patent/JP2011143752A/en
Granted legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2009Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00Electric propulsion with power supplied within the vehicle
    • B60L50/20Electric propulsion with power supplied within the vehicle using propulsion power generated by humans or animals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00Electric propulsion with power supplied within the vehicle
    • B60L50/50Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66Arrangements of batteries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00Electrodynamic brake systems for vehicles in general
    • B60L7/10Dynamic electric regenerative braking
    • B60L7/12Dynamic electric regenerative braking for vehicles propelled by dc motors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00Type of vehicles
    • B60L2200/12Bikes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00Electrical machine types; Structures or applications thereof
    • B60L2220/40Electrical machine applications
    • B60L2220/44Wheel Hub motors, i.e. integrated in the wheel hub
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/10Vehicle control parameters
    • B60L2240/12Speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/42Drive Train control parameters related to electric machines
    • B60L2240/423Torque
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2250/00Driver interactions
    • B60L2250/16Driver interactions by display
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power assisted bicycle capable of simplifying an appearance by forming a driving wheel itself by an electric motor, and suppressing the weight increase by using the small electric motor. <P>SOLUTION: In the power assisted bicycle 100 including an electric motor 12 giving an auxiliary power to a driving wheel 5 rotated by a force for pedaling a pedal 6, the driving wheel 5 is 10-15 inches (equivalent to 254-381 mm) and the electric motor 12 is provided as an out-rotor type electric motor 12 having a rotor rotating outside of a stator. The driving wheel 5 is formed by the electric motor 12 and a rim to which a tire of the driving wheel 5 is attached is formed by the rotor of the electric motor 12. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electrically assisted bicycle including an electric motor that assists a person who pedals (hereinafter referred to as “human power”).

  Bicycles are driven by human power, but in recent years, various types of electrically assisted bicycles have been devised that include an electric motor that assists human power so that the vehicle can be driven on an uphill or the like with a light force.

  Here, as with a normal bicycle, an electric assist bicycle is one in which a person runs the pedal and rotates the rear wheel, but if a person runs the pedal with a force exceeding a predetermined level, auxiliary power is required. As an example, an electric motor is operated to apply power to the rear wheels.

  In a conventional general electric assist bicycle, an electric motor is attached to a chain that transmits a pedaling force to a rear wheel as a driving wheel, and the pedal and the rear wheel have a miscellaneous structure.

  By the way, in some electrically assisted bicycles, as an electric motor, an out-rotor type electric motor in which a rotor rotates on an outer periphery of a stator is used, and a drive wheel is configured by the out-rotor type electric motor. Since such an electrically assisted bicycle has an electric motor disposed on the shaft portion of the drive wheel, there is no need to dispose an electric motor around the pedal and the rear wheel, and the overall appearance of the electrically assisted bicycle is simplified. Can be

  However, when an electric motor is used to form the drive wheel, a generally sized electric assist bicycle has a wheel around 20 inches (508 mm in terms of mm). Requires an electric motor with a large torque output. Therefore, the weight of the electrically assisted bicycle increases.

  The present invention has been made in view of the above circumstances, and not only can the appearance be simplified by configuring the drive wheels themselves with an electric motor, but also the weight can be increased by using a small electric motor. It is an object of the present invention to provide an electrically assisted bicycle that can suppress this.

The main means taken by the present invention to solve the above problems are as follows:
"Electric assist bicycle with an electric motor that gives auxiliary power to the driving wheel that is driven to rotate by pedaling force,
The driving wheel is 10 to 15 inches (254 to 381 mm in terms of mm),
The electric motor is an out-rotor type electric motor having a rotor rotating outside a stator, and constitutes a rim on which tires of driving wheels are mounted by the rotor. "
It is.

  Since the electric assist bicycle having the above-described configuration is configured by using an out-rotor type electric motor whose rotor rotates outside the stator, it is not necessary to attach the electric motor to any part other than the wheel. The device for transmitting the driving force of the electric motor to the wheels is not required, and the overall appearance of the electric assist bicycle can be simplified.

  Further, the drive wheel is 10 to 15 inches (254 to 381 mm in terms of mm), and has a smaller diameter than a general bicycle wheel. Further, the rim on which the tire of the small diameter driving wheel is mounted is constituted by a rotor of an out-rotor type electric motor. Therefore, a small output torque can be used as an electric motor for rotating the drive wheels themselves.

In the means described above,
“The driving wheel detects the electric motor, a human-powered driving mechanism that rotates the rotor by human power from outside the electric motor, and detects that human power of a predetermined level or more is applied to the human-powered driving mechanism. An electric motor comprising: a human power detection device; and an assist motor unit that is built in the electric motor and includes a motor control device that operates the electric motor in response to detection by the human power detection device. Assist bicycle
Is preferable.

  In the electric assist bicycle having the above-described configuration, the assist motor unit provides auxiliary power as assistance is required when the human power becomes equal to or higher than a predetermined level. A device for determining whether or not a device is present and a device for controlling an electric motor are unitized into a single device as a human power detection device or a motor control device. Therefore, in the electric assist bicycle having the above-described configuration, it is not necessary to provide a device for determining whether or not the human power is equal to or higher than the predetermined value or a device for controlling the electric motor separately from the assist motor unit. The structure can be simplified.

  As described above, according to the present invention, not only can the appearance be simplified by configuring the drive wheels themselves with an electric motor, but also an increase in weight can be suppressed by using a small electric motor. It is possible to provide an electrically assisted bicycle that can be used.

It is the schematic which shows an example of the electrically assisted bicycle which concerns on this invention. It is sectional drawing which shows an assist motor unit. It is a schematic diagram of an electric motor. It is a disassembled perspective view of a manpower drive mechanism. It is the schematic of a human power detection apparatus. It is a lock figure showing the electric composition of an assist motor unit. It is a chart figure explaining the operating state of an electric motor.

  Hereinafter, an example of an embodiment of an electrically assisted bicycle according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an example of an electrically assisted bicycle 100 according to the present invention.

  The electric assist bicycle 100 is a well-known bicycle including a frame 1, a handle 2, a saddle 3, a front wheel 4, a rear wheel 5, and the like. Further, in this electrically assisted bicycle 100, when the user pedals the pedal 6, a rotational driving force is applied from the sprocket 7 of the pedal 6 to the sprocket 9 of the rear wheel 5 through the chain 8, so that the rear wheel 5 is manpowered. It is rotationally driven by. In this electrically assisted bicycle 100, the rear wheel 5 that is a drive wheel is constituted by an assist motor unit 10 that uses an out-rotor type electric motor 12. In addition, a battery 11 serving as a power source of the assist motor unit 10 is mounted on the rear side of the electric assist bicycle 100 using a cargo bed.

  Moreover, in the electrically assisted bicycle 100 of this example, the front wheels 4 and the rear wheels 5 are 10 to 15 inches (254 to 381 mm in mm), more specifically 12 inches (about 305 mm in mm), A rim on which the tire of the rear wheel 5 is mounted is constituted by a rotor of an out-rotor type electric motor 12. In other words, the tire of the rear wheel 5 is mounted on the rotor itself of the out-rotor type electric motor 12.

  Next, details of the assist motor unit 10 will be described with reference to FIG.

  The electric motor 12 of the assist motor unit 10 is a brushless out-rotor type including a stator 29 having a large number of electromagnets 22 formed by electromagnetic coils and a rotor 69 having permanent magnets 62 and rotating outside the stator 29. The electric motor 12 is configured.

  The stator 29 includes a support shaft 20 attached to the frame 1 of the electrically assisted bicycle 100 and a disk-shaped stator main body 21 in which a large number of electromagnets 22 are arranged at predetermined intervals on the peripheral surface and are integrally fixed to the support shaft 20. And a bush 23 which is disposed on one side of the stator body 21 and is integrally fixed to the support shaft 20.

  Further, on the other side of the stator body 21, a sleeve 40 is rotatably attached to the support shaft 20 via bearings 30 and 31. Further, the sprocket 9 of the rear wheel 5 is assembled to the sleeve 40 via the one-way clutch 9a, and a rotational driving force only in the forward direction is given to the sleeve 40 by stroking the pedal 6 of the electric assist bicycle 100. It is done.

  On the other hand, the rotor 69 includes a rotor body 60 in which a rim portion 60b for mounting the tire T is integrally formed on the outer peripheral surface, and a large number of permanent magnets 62 are disposed on the inner peripheral surface at predetermined intervals, and the rotor main body 60. And a cap 61 fixed integrally therewith. Here, the rotor body 60 covers the surface of the stator body 21 on the sleeve 40 side, and the cap 61 covers the surface of the stator body 21 on the bush 23 side. In the rotor 69, the rotor body 60 is rotatably attached to the sleeve 40 via the bearing 50, and the cap 61 is rotatably attached to the bush 23 via the bearing 32. Therefore, the entire rotor 69 is rotatable with respect to the stator 29.

  Next, details of the electric motor 12 will be described.

  In the electric motor 12 of the present example, 20 permanent magnets 62 are disposed on the inner peripheral surface of the rotor body 60, while 18 electromagnets 22 are disposed on the outer peripheral edge of the stator body 21 as shown in FIG. 3. (Triangle mark, circle mark, and square mark members in FIG. 3) are provided. One electromagnet unit is formed by three adjacent electromagnets 22, and the stator 29 has six electromagnet units.

  Further, in this electric motor 12, the rotation of the rotor 69 is such that the two opposing electromagnet units are in one phase, the W phase in which Iw current flows, the V phase in which Iv current flows, and the U phase in which Iu current flows. Controlled by three-phase current.

  In FIG. 3, the W-phase electromagnet 22 is indicated by a triangle, the V-phase electromagnet 22 is indicated by a circle, and the U-phase electromagnet 22 is indicated by a square. Also, the black and white portions of each mark indicate that the winding direction of the electromagnetic coil constituting the electromagnet 22 is reversed.

  By the way, the assist motor unit 10 detects that the human power drive mechanism 13 that rotates the rotor 69 by human power given from the outside of the electric motor 12 and that the human power drive mechanism 13 is supplied with human power of a predetermined level or more. And a motor control device 15 that activates the electric motor 12 in response to detection by the human power detection device 14. When the force for driving the pedal 6 of the electric assist bicycle 100 exceeds a predetermined value. Auxiliary power by the electric motor 12 is applied to the rear wheel 5.

  Next, the details of the manpower drive mechanism 13, the manpower detector 14 and the motor controller 15 will be described.

  As shown in FIG. 4, the human-powered drive mechanism 13 is configured using a sleeve 40 that is rotatably mounted between the support shaft 20 of the stator 29 and the rotor main body 60 of the rotor 69. The sleeve 40 is integrally connected to the rotor body 60 by a connecting member 41, and through this connecting member 41, the rotational driving force only in the forward direction given by rowing the pedal 6 of the electric assist bicycle 100 is obtained. It is transmitted to the rotor body 60. Here, in this example, a C-shaped spring member 41 is employed as the connecting member 41.

  At both ends of the C-shaped spring member 41, contact members 42 and 43 are provided. One contact member 42 is fixed to the rotor body 60 by a set screw 44, and the other contact member 43 is stopped. It is fixed to the sleeve 40 by screws 44. The spring member 41 is formed of a steel plate and has sufficient rigidity. When a rotational driving force is applied to the sleeve 40 (see arrow A in FIG. 5), the rotational driving force is directly applied to the rotor body 60. (See arrow B in FIG. 5).

  Further, the spring member 41 is deformed when a predetermined force or more is applied in the circumferential direction, and is deformed so that both ends are close to each other when a predetermined or more rotational driving force is applied to the sleeve 40 (FIG. 5). (See arrow C). Here, since the contact members 42 and 43 are provided at both ends of the spring member 41, further deformation of the spring member 41 is restricted by the contact members 42 and 43 contacting each other, The rotational driving force of the sleeve 40 is transmitted as it is to the rotor body 60 by the contact of the contact members 42 and 43. Note that when the rotational driving force applied to the sleeve 40 becomes less than a predetermined value, the spring member 41 returns to its original shape with the adjacent ends separated from each other.

  In a state where the spring member 41 is deformed so that both ends are close to each other, the sleeve 40 is rotated with respect to the rotor body 60, in other words, a state in which a phase difference between the sleeve 40 and the rotor body 60 occurs. It becomes. In the assist motor unit 10 of this example, the human power detection device 14 detects a phase shift between the sleeve 40 and the rotor main body 60, so that the human power driving mechanism 13 is given a predetermined or higher human power. Is supposed to be detected. The specific configuration of the human power detection device 14 is as follows.

  As shown in FIGS. 2, 4, and 5, the sleeve 40 and the rotor body 60 are provided with a large number of permanent magnets 40 a and 60 a around the support shaft 20 of the stator 29 on the surface facing the stator body 21. A sensor substrate 72 having sensors 73 and 74 facing the permanent magnets 40a and 60a of the sleeve 40 and the rotor body 60 is provided on the surface of the stator body 21 on the sleeve 40 side. .

  Here, the permanent magnets 40a of the sleeve 40 and the permanent magnets 60a of the rotor body 60 are the same number, and in a state where the spring member 41 is not deformed, that is, in a state where there is no phase shift between the sleeve 40 and the rotor body 60, It arrange | positions so that a phase may mutually correspond. The sensors 73 and 74 are so-called “magnetic sensors” formed of a magnetic material, and generate electromotive force when a magnet passes near the surface. Therefore, by monitoring the voltage of the electromotive force generated in the sensor 74 on the sleeve 40 side and the sensor 73 on the rotor body 60 side, it can be determined whether or not a phase shift has occurred between the sleeve 40 and the rotor body 60. it can.

  Further, by monitoring the electromotive force of the sensor 73 on the rotor body 60 side, the rotational speed of the rotor body 60 can be measured, and thus the traveling speed of the electrically assisted bicycle 100 can be measured. Particularly in this example, sensors 73a and 73b are also provided before and after the sensor 73 on the rotor body 60 side so that the rotational direction of the rear wheel 5 of the electric assist bicycle 100 can also be detected.

  By the way, in a state where the sleeve 40 and the rotor body 60 are out of phase, a state where a predetermined rotational driving force is applied to the sleeve 40, that is, a state where the pedal 6 is twisted with a predetermined force or more. Yes, it is necessary to apply auxiliary power by the electric motor 12 to the rear wheel 5. Therefore, in this state, the electric motor 12 is operated by the power supply from the battery 11 by the motor control device 15 that controls the electric motor 12. Here, in this example, as shown in FIGS. 2 and 6, the motor control device 15 is configured by a motor control board 70 provided on the surface opposite to the sleeve 40 side of the stator body 21, and It is built in the motor 12. The motor control board 70 is electrically connected to the sensor board 72 described above, and controls the driving of the electric motor 12 by a signal from the sensor board 72.

  The motor control board 70 constituting the motor control device 15 is built in the electric motor 12. The motor control board 70 is provided on the stator 29 fixed to the frame 1 of the electric assist bicycle 100. Therefore, even if the rotor 69 rotates during the travel of the electrically assisted bicycle 100, no trouble occurs. Further, the wiring 71 for connecting the motor control board 70 and the battery 11 and the wiring 71 for connecting the motor control board 70 and a switch panel 16 to be described in detail later are provided on the bush 23 which is a member fixed to the frame 1. Further, since the motor is pulled out to the outside of the assist motor unit 10 through the wiring passage 23a, no trouble occurs even if the rotor 69 rotates during the traveling of the electric assist bicycle 100.

  By the way, in this example, the brake drum 61 a is integrally provided on the cap 61 of the rotor 69. Here, the brake drum 61a is formed in a shape and size applicable to a general bicycle rear wheel brake device. The brake device cover 24 and the brake member 25 (in the case of a belt brake device) are provided on the bush 23. The brake device can be easily formed by assembling the brake band. The brake drum 61a may be integrally formed with the cap 61 of the rotor 60, or may be formed as a separate member so that it can be integrated with the cap 61 by bolts, welding, or the like.

  Next, the usage mode of the electrically assisted bicycle 100 of this example will be described.

  The electric assist bicycle 100 is provided with an operation panel 16 as shown in FIG. 2 at a portion where the handle 2 or the like is easy to operate, and the operation of the assist motor unit 10 is operated by a switch operation on the operation panel 16. The In this example, the electric motor 12 is configured to function as a regenerative brake (generator).

  The operation panel 16 includes three switches SW1, SW2, and SW3.

  First, the switch SW1 is a switch for turning the power of the assist motor unit 10 ON / OFF. When the switch SW1 is pressed, the power is turned ON, and when the switch SW1 is pressed again, the power is turned OFF. Further, when the power is turned on, the LEDs 1 to 3 are lit according to the charge amount of the battery 11. Here, the state in which all the LEDs 1 to 3 are lit indicates that the charge amount of the battery 11 is sufficient, and the state in which only the LEDs 1 and 2 are lit indicates that the charge amount of the battery 11 is slightly insufficient, and only the LED 1 is present. The state where the lamp is not lit indicates that the remaining amount of charge of the battery 11 is small and charging is required.

  When the electric assist bicycle 100 is run with the power of the assist motor unit 10 turned on, the electric motor 12 operates to assist human power when auxiliary power is required on an uphill or the like. When the electric assist bicycle 100 reaches a predetermined speed or more on a downhill or the like, the electric motor 12 is controlled by the motor control board 70 to cause the electric motor 12 to function as a regenerative brake. Here, in this example, when the electrically assisted bicycle 100 reaches or exceeds the first speed, the electric motor 12 functions as a first regenerative brake, and when the electrically assisted bicycle 100 reaches a second speed that is faster than the first speed, The electric motor 12 is controlled by the motor control board 70 so that the motor 12 functions as a second regenerative brake having a braking force larger than that of the first regenerative brake.

  Specifically, as described above, the speed of the electrically assisted bicycle 100 can be measured by the sensor board 72. In the electric motor 12, a plurality of currents such as a W phase, a V phase, and a U phase can be measured. As described above, each of the electromagnets 22 is controlled. Therefore, in the motor control board 70, for example, in the first regenerative brake, the two-phase electromagnets 22 function as the regenerative brake in accordance with the signal from the sensor board 72 (speed of the electrically assisted bicycle 100). Then, regenerative brakes having different braking forces are generated in stages by varying the number of phases that function as regenerative brakes, such as by causing the three-phase electromagnets 22 to function as regenerative brakes.

  The state in which the electric motor 12 functions as a regenerative brake is a state in which the electric motor 12 serves as a generator. Therefore, by opening the charging circuit that charges the battery 11 with electricity from the electric motor 12, the electric motor 12 can function as a generator and the battery 11 can be charged.

  Next, the switch SW2 is a “charging mode” switch for charging the battery 11 by forcibly functioning the electric motor 12 of the assist motor unit 10 as a generator. For example, the switch SW2 is set to 2 seconds. By long pressing, the charging mode is turned on and the LED 4 is lit. Note that the switch operation on the ON side of the switch SW2 is configured to accept the operation when the electrically assisted bicycle 100 is stopped or less than a predetermined safe speed.

  On the other hand, when the switch SW2 is pressed again in the state where the charge mode is ON, the charge mode is turned OFF. However, as long as the switch SW2 is pressed, the switch operation on the OFF side takes a short time. But it turns off. In addition, the assist bicycle 100 is configured to accept the OFF operation regardless of whether the assist bicycle 100 is stopped or traveling.

  In the charging mode, the electric motor 12 is made to function as a generator and the battery 11 is charged, and braking force is generated. Only a braking force smaller than that of the first regenerative brake described above is generated, and it is difficult for the vehicle to interfere with traveling. Specifically, the number of phases of the electromagnet 22 that functions as a regenerative brake is made smaller than the number of phases of the first regenerative brake, so that a large braking force is not generated.

  Finally, the switch SW3 is not directly related to the assist motor unit 10, but is provided separately from the assist motor unit 10 and connected to the battery 11, and attached to the front side of the electrically assisted bicycle 100 (illustrated). (Omitted) is a switch to turn on and off, and when pressed once, the light turns on, and when pressed again, the light turns off.

  In the electrically assisted bicycle 100 configured as described above, the electric motor 12 operates as shown in FIG. Here, in FIG. 7, the slope of the road surface on which the electrically assisted bicycle 100 travels is schematically shown as “traveling road”, and the operating state of the electric motor 12 is set to “assist” as the side that operates as auxiliary power. The graph is an upward graph with respect to the reference line, and the side operating as a generator is indicated as “regeneration” as a graph downward with respect to the horizontal reference line.

  First, traveling is started with the assist motor unit 10 powered on. When traveling on a flat travel path a, the electric motor 12 does not operate, and the electric assist bicycle 100 travels with the rotor 69 of the electric motor 12 being rotationally driven only by human power. Next, on the uphill running path b, the force for driving the bed 6 is increased, and when the rotor 69 is given a rotational driving force of a predetermined level or more by human power, the electric motor 12 is operated to increase the human power to climb the slope. Assist. Next, on the flat travel path c again, auxiliary power is not required, so the electric motor 12 stops operating, and the electric assist bicycle 100 travels with the rotor 69 being rotationally driven only by human power. Next, on the downhill travel path d, not only does auxiliary power be required, but the speed increases even if the pedal 6 does not have a saddle, so the electric motor 12 functions as a first regenerative brake when the speed exceeds the first speed. Then, the braking force is generated and the battery 11 is charged. Next, in the traveling road e with a more inclined angle, there may be a case where the second speed is higher than the first speed. In this case, assuming that braking is insufficient with the braking force of the first regenerative brake, the electric motor 12 functions as a second regenerative brake having a larger braking force than the first regenerative brake, and generates a larger braking force. At the same time, the battery 11 is charged with more electric power.

  Finally, on the flat road f after going down the slope, no braking force is required and no auxiliary power is required, so the electric motor 12 does not function as a regenerative brake and does not operate. The electrically assisted bicycle 100 travels while the rotor 69 is rotationally driven only by human power. Here, when the charge amount of the battery 11 is insufficient, the electric motor 12 is made smaller than the first regenerative brake by operating the operation panel 16 to set the assist motor unit 10 to the “charge mode”. It can function as a generator that generates only braking force (shaded area in FIG. 7) to compensate for the insufficient power.

  As described above, in the electrically assisted bicycle 100 of this example, the rear wheel 5 is 10 to 15 inches (254 to 381 mm in terms of mm), and the rear wheel 5 can be rotated with a small torque. A small electric motor can be adopted as the electric motor 12 for providing auxiliary power.

  Further, in the electrically assisted bicycle 100 of this example, the rim on which the tire of the rear wheel 5 is mounted is constituted by the rotor of the out-rotor type electric motor 12, and the rotor 69 is rotated by the electric motor 12 and human power. The human power drive mechanism 13 to be operated, the human power detection device 14 for detecting that the human power drive mechanism 13 is given a predetermined or higher human power, and the electric motor 12 to be operated in response to the detection by the human power detection device 14 The rear wheel 5 itself is configured by an assist motor unit 10 that is a compact unit of various devices (hereinafter referred to as “auxiliary power devices”) for providing auxiliary power, such as the motor control device 15. .

  Therefore, there is no need to arrange auxiliary power devices around the rear wheel 5 or around the pedal 6, and the rear wheel or around the pedal can be neatly accommodated in the same manner as an ordinary bicycle without an electric motor. This is suitable for realizing a small electric assist bicycle or a folding electric assist bicycle.

T tire 1 frame 2 handle 3 saddle 4 front wheel 5 rear wheel 6 pedal 7 sprocket 8 chain 9 sprocket 9a one-way clutch 10 assist motor unit 11 battery 12 electric motor 13 human power drive mechanism 14 human power detection device 15 motor control device 16 operation panel DESCRIPTION OF SYMBOLS 20 Support shaft 21 Stator main body 22 Electromagnet 23 Bush 23a Wiring path 24 Cover 25 Brake member 29 Stator 30 Bearing 31 Bearing 32 Bearing 40 Sleeve 40a Permanent magnet 41 Spring member (connection member)
42 Contact member 43 Contact member 44 Set screw 50 Bearing 60 Rotor body 60a Permanent magnet 60b Rim portion 61 Cap 61a Brake drum 62 Permanent magnet 69 Rotor 70 Motor control board 71 Wiring 72 Sensor board 73 Sensor 74 Sensor 100 Electric assist bicycle

Claims (2)

  1. An electrically assisted bicycle including an electric motor that provides auxiliary power to a driving wheel that is rotationally driven by a pedaling force,
    The drive wheels are 10-15 inches;
    The electric motor is an out-rotor type electric motor having a rotor rotating outside a stator, and constitutes a rim on which tires of driving wheels are mounted by the rotor. .
  2. The drive wheel includes the electric motor, a human-powered drive mechanism that rotates the rotor by human power from outside the electric motor, and a person that detects that the human-powered drive mechanism is given a predetermined or higher human power. The power supply device comprises: an assist motor unit comprising: a power detection device; and a motor control device built in the electric motor and operating the electric motor in response to detection by the human power detection device. The electrically assisted bicycle according to 1.
JP2010004131A 2010-01-12 2010-01-12 Power assisted bicycle Granted JP2011143752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010004131A JP2011143752A (en) 2010-01-12 2010-01-12 Power assisted bicycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010004131A JP2011143752A (en) 2010-01-12 2010-01-12 Power assisted bicycle

Publications (1)

Publication Number Publication Date
JP2011143752A true JP2011143752A (en) 2011-07-28

Family

ID=44459013

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2010004131A Granted JP2011143752A (en) 2010-01-12 2010-01-12 Power assisted bicycle

Country Status (1)

Country Link
JP (1) JP2011143752A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2703276A1 (en) * 2012-08-29 2014-03-05 Ulrich Alber GmbH Auxiliary drive device, vehicle with an auxiliary drive device and method for operating a vehicle
WO2015033492A1 (en) * 2013-09-05 2015-03-12 パナソニックIpマネジメント株式会社 Bicycle speed detection device, and bicycle
EP2873601A1 (en) * 2013-11-15 2015-05-20 Mando Corporation Electric bicycle and control method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2703276A1 (en) * 2012-08-29 2014-03-05 Ulrich Alber GmbH Auxiliary drive device, vehicle with an auxiliary drive device and method for operating a vehicle
WO2015033492A1 (en) * 2013-09-05 2015-03-12 パナソニックIpマネジメント株式会社 Bicycle speed detection device, and bicycle
CN105473436A (en) * 2013-09-05 2016-04-06 松下知识产权经营株式会社 Bicycle speed detection device, and bicycle
JPWO2015033492A1 (en) * 2013-09-05 2017-03-02 パナソニックIpマネジメント株式会社 Bicycle vehicle speed detection device and bicycle
EP2873601A1 (en) * 2013-11-15 2015-05-20 Mando Corporation Electric bicycle and control method thereof
US9346516B2 (en) 2013-11-15 2016-05-24 Mando Corporation Electric bicycle and control method thereof
TWI552916B (en) * 2013-11-15 2016-10-11 萬都股份有限公司 Electric bicycle and control method thereof

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