WO2007013742A2 - Motor with power transmission of one body type - Google Patents

Motor with power transmission of one body type Download PDF

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Publication number
WO2007013742A2
WO2007013742A2 PCT/KR2006/002601 KR2006002601W WO2007013742A2 WO 2007013742 A2 WO2007013742 A2 WO 2007013742A2 KR 2006002601 W KR2006002601 W KR 2006002601W WO 2007013742 A2 WO2007013742 A2 WO 2007013742A2
Authority
WO
WIPO (PCT)
Prior art keywords
power transmission
transmission shaft
motor
rotors
rear wheel
Prior art date
Application number
PCT/KR2006/002601
Other languages
French (fr)
Other versions
WO2007013742A3 (en
Inventor
Dong-Sik Shin
Chang-Kun Baek
Original Assignee
Ko, Heui-Soo
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ko, Heui-Soo filed Critical Ko, Heui-Soo
Publication of WO2007013742A2 publication Critical patent/WO2007013742A2/en
Publication of WO2007013742A3 publication Critical patent/WO2007013742A3/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2207/00—Specific aspects not provided for in the other groups of this subclass relating to arrangements for handling mechanical energy
    • H02K2207/03—Tubular motors, i.e. rotary motors mounted inside a tube, e.g. for blinds
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle

Definitions

  • the present invention relates to an electric bicycle, and more particularly, to a motor with an integral body type of power transmission shaft for use in an electric bicycle with no chain therein.
  • an electric bicycle is a vehicle with no chain which moves by the rotation of two wheels as a motor as a power sauce is activated.
  • Existing motors include a rear wheel hub-embedded motor and a chain reduction motor.
  • the chain reduction motor is mounted to a pedal, which also needs many difficulties by the interference of a housing at the time of mounting the motor, and additionally, there occurs a problem that many losses of power are not avoided during the transmission of power. Disclosure of Invention Technical Problem
  • the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a motor with an integral body type of power transmission shaft that is easily mounted to an electric bicycle, thereby providing excellent assembling and productivity, and reduces the losses of power by the simplicity of parts therein, thereby making the efficiency of transmission of power desirably optimized.
  • a motor with an integral body type of power transmission shaft including: first and second stators for generating a magnetic force if an electric current is applied to a coil; first and second rotors each having a plurality of permanent magnets, a core and a shaft in such a manner as to be mounted rotatably with respect to the first and second stators; a power transmission shaft rotated integrally with the first and second rotors; a pedal side gear rotatably mounted integrally along the outer periphery of the power transmission shaft in such a manner as to be engaged with a gear attached to a pedal; and a rear wheel side gear rotatably mounted integrally along the outer periphery of the power transmission shaft in such a manner as to be engaged with a gear attached to a rotary shaft of a rear wheel.
  • the motor with an integral body type of power transmission shaft further includes a housing for containing the first and second rotors and the first and second stators therein.
  • a plurality of sets of first and second rotors and first and second stators are mounted continuously along the outer periphery of the power transmission shaft in a length direction of the power transmission shaft.
  • the present invention provides a motor with an integral body type of power transmission shaft that is easily mounted to an electric bicycle, thereby providing excellent assembling and productivity, and reduces the losses of power by the simplicity of parts therein, thereby making the efficiency of transmission of power desirably optimized.
  • FIG. 1 is a perspective view showing a motor with an integral body type of power transmission shaft according to the present invention
  • FIG.2 is an exploded assembling view showing the motor with an integral body type of power transmission shaft according to the present invention
  • FIG.3 is a sectional view showing the motor with an integral body type of power transmission shaft according to the present invention.
  • FIG.4 is a perspective view showing the rotors employed in the motor with an integral body type of power transmission shaft according to the present invention.
  • FIG.5 is a perspective showing the stators employed in the motor with an integral body type of power transmission shaft according to the present invention. Best Mode for Carrying Out the Invention
  • a motor with an integral body type of power transmission shaft includes two stators 2e for generating a magnetic force if an electric current is applied to a coil, two rotors 2c each having a plurality of permanent magnets, a core and a shaft, a motor housing 2f for containing the two rotors 2c and the two stators 2e therein, a power transmission shaft 2d rotated integrally with the two rotors 2c, and a pedal side gear 2a and a rear wheel side gear 2g mounted at both ends of the power transmission shaft 2d.
  • the two stators 2e are fixedly provided inside the motor housing 2f, and the two rotors 2c are rotatably mounted along the outer peripheries of the two stators 2e.
  • the motor housing 2f is fixedly coupled at one side of a bicycle body.
  • the power transmission shaft 2d is rotated integrally with the rotors 2c, serving as a rotary shaft of the rotors 2c.
  • the two rotors 2c are continuously mounted along the outer periphery of the power transmission shaft 2d in a length direction of the power transmission shaft 2d, and the two stators 2e are correspondingly mounted along the outer peripheries of the two rotors 2c. That is to say, two sets of rotors 2c and stators 2e are continuously mounted along the outer periphery of the power transmission shaft 2d in the length direction of the power transmission shaft 2d.
  • the power transmission shaft 2d is mounted in such a manner as to be passed through the motor housing 2f.
  • the power transmission shaft 2d is supported rotatably by shaft housings 2b.
  • the pedal side gear 2a and the rear wheel side gear 2g are fixedly mounted at both ends of the power transmission shaft 2d exposed to the outside of the motor housing 2f.
  • the pedal side gear 2a is rotatably mounted integrally with one end of the power transmission shaft 2d in such a manner as to be engaged with the gear attached to a pedal.
  • the gear attached to the pedal and the pedal side gear 2a function as bevel gears that cooperatively cross to each other.
  • the rear wheel side gear 2g is rotatably mounted integrally with the other end of the power transmission shaft 2d in such a manner as to be engaged with the gear attached to the rotary shaft of a rear wheel.
  • the gear attached to the rotary shaft of the rear wheel and the rear wheel side gear is rotatably mounted integrally with the other end of the power transmission shaft 2d in such a manner as to be engaged with the gear attached to the rotary shaft of a rear wheel.
  • the power transmission means that transmits the power generated by the rotation of the power transmission shaft 2d to the gear attached to the pedal and to the gear attached to the rotary shaft of the rear wheel, are not restricted to the bevel gears.
  • the motor with an integral body type of power transmission shaft according to the present invention is directly connected to an intermediate portion of a power transmission shaft assembly body transmitting power from the pedal of the bicycle to the rear wheel.
  • the motor with an integral body type of power transmission shaft according to the present invention has a substantially thin and elongated body having a length substantially longer than a diameter thereof, such that it is most desirably of a multi-step structure wherein the body is divided by 2 to N so as to improve the assembling and productivity thereof.
  • a motor with an integral body type of power transmission shaft according to the present invention is mounted at an electric bicycle with no chain. Further, the motor of this invention may be utilized to a bicycle that is driven by the power applied from the motor or the pedals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The present invention relates to first and second stators for generating a magnetic force if an electric current is applied to a coil; first and second rotors each having a plurality of permanent magnets, a core and a shaft in such a manner as to be mounted rotatably with respect to the first and second stators; a power transmission shaft rotated integrally with the first and second rotors; a pedal side gear rotatably mounted integrally along the outer periphery of the power transmission shaft in such a manner as to be engaged with a gear attached to a pedal; and a rear wheel side gear rotatably mounted integrally along the outer periphery of the power transmission shaft in such a manner as to be engaged with a gear attached to a rotary shaft of a rear wheel. The motor with an integral body type of power transmission shaft is easily mounted to an electric bicycle, thereby providing excellent assembling and productivity, and reduces the losses of power by the simplicity of parts therein, thereby making the efficiency of transmission of power desirably optimized.

Description

Description MOTOR WITH POWER TRANSMISSION OF ONE BODY TYPE
Technical Field
[1] The present invention relates to an electric bicycle, and more particularly, to a motor with an integral body type of power transmission shaft for use in an electric bicycle with no chain therein. Background Art
[2] Generally, an electric bicycle is a vehicle with no chain which moves by the rotation of two wheels as a motor as a power sauce is activated. Existing motors include a rear wheel hub-embedded motor and a chain reduction motor.
[3] In case of the rear wheel hub-embedded motor, a change gear is mounted at the hub of the rear wheel, which needs many difficulties at the time of mounting the change gear.
[4] Further, the chain reduction motor is mounted to a pedal, which also needs many difficulties by the interference of a housing at the time of mounting the motor, and additionally, there occurs a problem that many losses of power are not avoided during the transmission of power. Disclosure of Invention Technical Problem
[5] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a motor with an integral body type of power transmission shaft that is easily mounted to an electric bicycle, thereby providing excellent assembling and productivity, and reduces the losses of power by the simplicity of parts therein, thereby making the efficiency of transmission of power desirably optimized. Technical Solution
[6] To accomplish the above object, according to the present invention, there is provided a motor with an integral body type of power transmission shaft including: first and second stators for generating a magnetic force if an electric current is applied to a coil; first and second rotors each having a plurality of permanent magnets, a core and a shaft in such a manner as to be mounted rotatably with respect to the first and second stators; a power transmission shaft rotated integrally with the first and second rotors; a pedal side gear rotatably mounted integrally along the outer periphery of the power transmission shaft in such a manner as to be engaged with a gear attached to a pedal; and a rear wheel side gear rotatably mounted integrally along the outer periphery of the power transmission shaft in such a manner as to be engaged with a gear attached to a rotary shaft of a rear wheel. [7] Desirably, the motor with an integral body type of power transmission shaft further includes a housing for containing the first and second rotors and the first and second stators therein. [8] Desirably, a plurality of sets of first and second rotors and first and second stators are mounted continuously along the outer periphery of the power transmission shaft in a length direction of the power transmission shaft.
Advantageous Effects
[9] The present invention provides a motor with an integral body type of power transmission shaft that is easily mounted to an electric bicycle, thereby providing excellent assembling and productivity, and reduces the losses of power by the simplicity of parts therein, thereby making the efficiency of transmission of power desirably optimized. Brief Description of the Drawings
[10] FIG. 1 is a perspective view showing a motor with an integral body type of power transmission shaft according to the present invention;
[11] FIG.2 is an exploded assembling view showing the motor with an integral body type of power transmission shaft according to the present invention;
[12] FIG.3 is a sectional view showing the motor with an integral body type of power transmission shaft according to the present invention;
[13] FIG.4 is a perspective view showing the rotors employed in the motor with an integral body type of power transmission shaft according to the present invention; and
[14] FIG.5 is a perspective showing the stators employed in the motor with an integral body type of power transmission shaft according to the present invention. Best Mode for Carrying Out the Invention
[15] Now, an explanation on a preferred embodiment of the present invention will be in detail given with reference to attached drawings.
[16] A motor with an integral body type of power transmission shaft according to the present invention includes two stators 2e for generating a magnetic force if an electric current is applied to a coil, two rotors 2c each having a plurality of permanent magnets, a core and a shaft, a motor housing 2f for containing the two rotors 2c and the two stators 2e therein, a power transmission shaft 2d rotated integrally with the two rotors 2c, and a pedal side gear 2a and a rear wheel side gear 2g mounted at both ends of the power transmission shaft 2d.
[17] The two stators 2e are fixedly provided inside the motor housing 2f, and the two rotors 2c are rotatably mounted along the outer peripheries of the two stators 2e.
[18] The motor housing 2f is fixedly coupled at one side of a bicycle body. [19] The power transmission shaft 2d is rotated integrally with the rotors 2c, serving as a rotary shaft of the rotors 2c. [20] The two rotors 2c are continuously mounted along the outer periphery of the power transmission shaft 2d in a length direction of the power transmission shaft 2d, and the two stators 2e are correspondingly mounted along the outer peripheries of the two rotors 2c. That is to say, two sets of rotors 2c and stators 2e are continuously mounted along the outer periphery of the power transmission shaft 2d in the length direction of the power transmission shaft 2d. [21] The power transmission shaft 2d is mounted in such a manner as to be passed through the motor housing 2f. The power transmission shaft 2d is supported rotatably by shaft housings 2b. [22] The pedal side gear 2a and the rear wheel side gear 2g are fixedly mounted at both ends of the power transmission shaft 2d exposed to the outside of the motor housing 2f. [23] The pedal side gear 2a is rotatably mounted integrally with one end of the power transmission shaft 2d in such a manner as to be engaged with the gear attached to a pedal. [24] The gear attached to the pedal and the pedal side gear 2a function as bevel gears that cooperatively cross to each other. [25] The rear wheel side gear 2g is rotatably mounted integrally with the other end of the power transmission shaft 2d in such a manner as to be engaged with the gear attached to the rotary shaft of a rear wheel. [26] The gear attached to the rotary shaft of the rear wheel and the rear wheel side gear
2g function as bevel gears that cooperatively cross to each other. [27] In this embodiment, the power transmission means, that transmits the power generated by the rotation of the power transmission shaft 2d to the gear attached to the pedal and to the gear attached to the rotary shaft of the rear wheel, are not restricted to the bevel gears. [28] The motor with an integral body type of power transmission shaft according to the present invention is directly connected to an intermediate portion of a power transmission shaft assembly body transmitting power from the pedal of the bicycle to the rear wheel. [29] Now, an explanation of the operation of the motor with an integral body type of power transmission shaft according to the present invention will be given. [30] First, when the bicycle is driven by the pedal with no power of the motor, the power is transmitted from the gear attached to the pedal to the pedal side gear 2a mounted at the pedal side end portion of the power transmission shaft 2d. [31] As the pedal side gear 2a is rotated, the power transmission shaft 2d is rotated integrally with the pedal side gear 2a, such that the rear wheel side gear 2g is rotated integrally with the power transmission shaft 2d.
[32] If the rear wheel side gear 2g is rotated, the gear attached to the rotary shaft of the rear wheel is rotated cooperatively to the rear wheel side gear 2g, such that the rear wheel is rotated.
[33] On the other hand, when the bicycle is driven with the power of the motor, the power transmission shaft 2d is rotated to rotate the rear wheel side gear 2g. If the rear wheel side gear 2g is rotated, the gear attached to the rotary shaft of the rear wheel is rotated cooperatively to the rear wheel side gear 2g, such that the rear wheel is finally rotated.
[34] The motor with an integral body type of power transmission shaft according to the present invention has a substantially thin and elongated body having a length substantially longer than a diameter thereof, such that it is most desirably of a multi-step structure wherein the body is divided by 2 to N so as to improve the assembling and productivity thereof. Industrial Applicability
[35] According to the present invention, a motor with an integral body type of power transmission shaft according to the present invention is mounted at an electric bicycle with no chain. Further, the motor of this invention may be utilized to a bicycle that is driven by the power applied from the motor or the pedals.

Claims

Claims
[1] A motor with an integral body type of power transmission shaft comprising: first and second stators for generating a magnetic force if an electric current is applied to a coil; first and second rotors each having a plurality of permanent magnets, a core and a shaft in such a manner as to be mounted rotatably with respect to the first and second stators; a power transmission shaft rotated integrally with the first and second rotors; a pedal side gear rotatably mounted integrally along the outer periphery of the power transmission shaft in such a manner as to be engaged with a gear attached to a pedal; and a rear wheel side gear rotatably mounted integrally along the outer periphery of the power transmission shaft in such a manner as to be engaged with a gear attached to a rotary shaft of a rear wheel.
[2] The motor with an integral body type of power transmission shaft according to claim 1, further comprising a housing for containing the first and second rotors and the first and second stators therein.
[3] The motor with an integral body type of power transmission shaft according to claim 1 or claim 2, wherein a plurality of sets of first and second rotors and first and second stator are mounted continuously along the outer periphery of the power transmission shaft in a length direction of the power transmission shaft.
PCT/KR2006/002601 2005-07-26 2006-07-03 Motor with power transmission of one body type WO2007013742A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20-2005-0021676U KR200403613Y1 (en) 2005-07-26 2005-07-26 power transmission shaft one body motor
KR20-2005-0021676 2005-07-26

Publications (2)

Publication Number Publication Date
WO2007013742A2 true WO2007013742A2 (en) 2007-02-01
WO2007013742A3 WO2007013742A3 (en) 2007-03-22

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WO (1) WO2007013742A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20090075A1 (en) * 2009-02-13 2010-08-14 Magneti Marelli Spa ELECTRIC MACHINE WITH SINGLE STATOR AND TWO ROTORS BETWEEN THEM INDEPENDENT AND ROAD VEHICLE PROVIDED WITH THIS ELECTRIC MACHINE
WO2014005590A1 (en) * 2012-07-04 2014-01-09 Munksoe Lars Vehicle with shaft transmission and electric motor
DE102015107163A1 (en) 2015-05-07 2016-11-10 Carbofibretec Gmbh Drive a muscle-powered vehicle with integrated and decoupled electric drive

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101047132B1 (en) 2011-01-14 2011-07-07 고희수 Assembly type stator and electric motor using the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001213381A (en) * 2000-02-02 2001-08-07 Honda Motor Co Ltd Power assisted bicycle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0524575A (en) * 1991-07-19 1993-02-02 Toyota Autom Loom Works Ltd Motorcycle
JPH07149280A (en) * 1993-11-26 1995-06-13 Koyo Seiko Co Ltd Bicycle having electric motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001213381A (en) * 2000-02-02 2001-08-07 Honda Motor Co Ltd Power assisted bicycle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20090075A1 (en) * 2009-02-13 2010-08-14 Magneti Marelli Spa ELECTRIC MACHINE WITH SINGLE STATOR AND TWO ROTORS BETWEEN THEM INDEPENDENT AND ROAD VEHICLE PROVIDED WITH THIS ELECTRIC MACHINE
EP2219285A1 (en) * 2009-02-13 2010-08-18 Magneti Marelli S.p.A. Electric machine with single stator and two mutually independent rotors, and road vehicle provided with said electric machine
US8222784B2 (en) 2009-02-13 2012-07-17 MAGNETI MARELLI S.p.A. Electric machine with single stator and two mutually independent rotors, and road vehicle provided with said electric machine
WO2014005590A1 (en) * 2012-07-04 2014-01-09 Munksoe Lars Vehicle with shaft transmission and electric motor
EP2867110A4 (en) * 2012-07-04 2016-04-13 Lars Munksø Vehicle with shaft transmission and electric motor
US9334019B2 (en) 2012-07-04 2016-05-10 Lars Munksø Vehicle with shaft transmission and electric motor
DE102015107163A1 (en) 2015-05-07 2016-11-10 Carbofibretec Gmbh Drive a muscle-powered vehicle with integrated and decoupled electric drive

Also Published As

Publication number Publication date
WO2007013742A3 (en) 2007-03-22
KR200403613Y1 (en) 2005-12-12

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