IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0211512
(2011-08-17)
|
등록번호 |
US-8708084
(2014-04-29)
|
우선권정보 |
JP-2010-192754 (2010-08-30) |
발명자
/ 주소 |
- Kuroki, Masahiro
- Ikegami, Kentaro
|
출원인 / 주소 |
|
대리인 / 주소 |
Birch, Stewart, Kolasch & Birch, LLP
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
4 |
초록
▼
A power-assisted bicycle with an auxiliary power unit that improves positional stability of a torque sensor and inhibits the position of the sensor from being misaligned, wherein the power-assisted bicycle includes an annular hollow member inserted over an outer periphery of a crankshaft and a one-w
A power-assisted bicycle with an auxiliary power unit that improves positional stability of a torque sensor and inhibits the position of the sensor from being misaligned, wherein the power-assisted bicycle includes an annular hollow member inserted over an outer periphery of a crankshaft and a one-way clutch disposed on the hollow member for transmitting, when a pedaling torque in a direction in which the power-assisted bicycle traveling in a forward direction, is applied to the crankshaft, and wherein a magnetic film is formed in a recess disposed in an outer periphery of the hollow member, and a magnetostrictive torque sensor is positioned and fixed by a support member for rotatably supporting the magnetostrictive torque sensor relative to the annular hollow member at both ends of the recess, such that the magnetostrictive torque sensor faces the magnetic film in the recess.
대표청구항
▼
1. A bicycle with an auxiliary power unit including control means for controlling an output of a motor according to a torque value of a pedaling torque applied to a crankshaft, as detected by a torque sensor, the bicycle comprising: an annular hollow torque transmitting member inserted over an outer
1. A bicycle with an auxiliary power unit including control means for controlling an output of a motor according to a torque value of a pedaling torque applied to a crankshaft, as detected by a torque sensor, the bicycle comprising: an annular hollow torque transmitting member inserted over an outer periphery of the crankshaft; anda one-way clutch, disposed on the hollow torque transmitting member, for transmitting the pedaling torque to a drive wheel when the pedaling torque, in a direction in which the bicycle with the auxiliary power unit traveling in a forward direction, is applied to the crackshaft;wherein a magnetic film is formed in a recess disposed in an outer periphery of the hollow torque transmitting member; anda support member for positioning and fixing the torque sensor and for rotatably supporting the torque sensor relative to the hollow torque transmitting member at end portions of the recess such that the torque sensor faces the magnetic film in the recess. 2. The bicycle with an auxiliary power unit according to claim 1, wherein the hollow torque transmitting member includes a projection disposed on a first end thereof; andthe projection and the support member abut each other to thereby position and fix the torque sensor. 3. The bicycle with an auxiliary power unit according to claim 2, wherein the support member includes a first member and a second member disposed on an end side of the rotatable torque sensor which is rotatable relative to the hollow torque transmitting member, and a housing is provided for accommodating the torque sensor. 4. The bicycle with an auxiliary power unit according to claim 3, wherein the housing has a recess, annularly disposed on an inside end portion thereof, for accommodating the first member; andthe projection of the hollow torque transmitting member, the housing, and the first member together position and fix the torque sensor. 5. The bicycle with an auxiliary power unit according to claim 2, wherein the one-way clutch includes a clutch inner, a clutch outer, and a ratchet for engaging the clutch inner and the clutch outer; andthe clutch inner is integrally formed with the crankshaft and the clutch outer is disposed on a side of the hollow torque transmitting member. 6. The bicycle with an auxiliary power unit according to claim 2, and further comprising: an output unit for outputting to the drive wheel the pedaling torque applied to the crankshaft and transmitted via the one-way clutch; andan output shaft for outputting a driving force of the motor to the drive wheel;wherein the crankshaft, a drive shaft of the motor, and the output shaft are disposed in sequence from a front side of the bicycle; andthe output unit is disposed along the crankshaft, and the one-way clutch and the torque sensor are disposed in sequence from a side opposite to the output unit. 7. The bicycle with an auxiliary power unit according to claim 1, wherein the support member includes a first member and a second member disposed on an end side of the rotatable torque sensor which is rotatable, relative to the hollow torque transmitting member, and a housing is provided for accommodating the torque sensor. 8. The bicycle with an auxiliary power unit according to claim 7, and further comprising: an output unit for outputting to the drive wheel the pedaling torque applied to the crankshaft and transmitted via the one-way clutch; andan output shaft for outputting a driving force of the motor to the drive wheel;wherein the crankshaft, a drive shaft of the motor, and the output shaft are disposed in sequence from a front side of the bicycle; andthe output unit is disposed along the crankshaft, and the one-way clutch and the torque sensor are disposed in sequence from a side of the output unit. 9. The bicycle with an auxiliary power unit according to claim 1, wherein the one-way clutch includes a clutch inner, a clutch outer, and a ratchet for engaging the clutch inner and the clutch outer; andthe clutch inner is integrally formed with the crankshaft and the clutch outer is disposed on a side of the hollow torque transmitting member. 10. The bicycle with an auxiliary power unit according to claim 1, and further comprising: an output unit for outputting to the drive wheel the pedaling torque applied to the crankshaft and transmitted via the one-way clutch; andan output shaft for outputting a driving force of the motor to the drive wheel;wherein the crankshaft, a drive shaft of the motor, and the output shaft are disposed in sequence from a front side of the bicycle; andthe output unit is disposed along the crankshaft, and the one-way clutch and the torque sensor are disposed in sequence from a side opposite to the output unit. 11. An auxiliary power unit including control means for controlling an output of a motor according to a torque value of a pedaling torque applied to a crankshaft, as detected by a torque sensor, comprising: an annular hollow torque transmitting member inserted over an outer periphery of the crankshaft; anda one-way clutch, disposed on the hollow torque transmitting member for transmitting the pedaling torque when the pedaling torque, in a predetermined direction with the auxiliary power unit traveling in a forward direction, is applied to the crankshaft;wherein a magnetic film is formed in a recess disposed in an outer periphery of the hollow torque transmitting member; anda support member for positioning and fixing the torque sensor and for rotatably supporting the torque sensor relative to the hollow torque transmitting member at end portions of the recess such that the torque sensor faces the magnetic film in the recess. 12. The auxiliary power unit according to claim 11, wherein the hollow torque transmitting member includes a projection disposed on a first end thereof; andthe projection and the support member abut each other to thereby position and fix the torque sensor. 13. The auxiliary power unit according to claim 12, wherein the support member includes a first member and a second member disposed on an end side of the rotatable torque sensor which is rotatable, relative to the hollow torque transmitting member, and a housing is provided for accommodating the torque sensor. 14. The auxiliary power unit according to claim 13, wherein the housing has a recess, annularly disposed on an inside end portion thereof, for accommodating the first member; andthe projection of the hollow torque transmitting member, the housing, and the first member together position and fix the torque sensor. 15. The auxiliary power unit according to claim 12, wherein the one-way clutch includes a clutch inner, a clutch outer, and a ratchet for engaging the clutch inner and the clutch outer; andthe clutch inner is integrally formed with the crankshaft and the clutch outer is disposed on a side of the hollow torque transmitting member. 16. The auxiliary power unit according to claim 12, and further comprising: an output unit for outputting the pedaling torque applied to the crankshaft and transmitted via the one-way clutch; andan output shaft for outputting a driving force of the motor;wherein the crankshaft, a drive shaft of the motor, and the output shaft are disposed in sequence; andthe output unit is disposed along the crankshaft, and the one-way clutch and the torque sensor are disposed in sequence from a side opposite to the output unit. 17. The auxiliary power unit according to claim 11, wherein the support member includes a first member and a second member disposed on an end side of the rotatable torque sensor which is rotatable, relative to the hollow torque transmitting member, and a housing is provided for accommodating the torque sensor. 18. The auxiliary power unit according to claim 17, and further comprising: an output unit for outputting the pedaling torque applied to the crankshaft and transmitted via the one-way clutch; andan output shaft for outputting a driving force of the motor;wherein the crankshaft, a drive shaft of the motor, and the output shaft are disposed in sequence; andthe output unit is disposed along the crankshaft, and the one-way clutch and the torque sensor are disposed in sequence from a side of the output unit. 19. The auxiliary power unit according to claim 11, wherein the one-way clutch includes a clutch inner, a clutch outer, and a ratchet for engaging the clutch inner and the clutch outer; andthe clutch inner is integrally formed with the crankshaft and the clutch outer is disposed on a side of the hollow torque transmitting member. 20. The auxiliary power unit according to claim 11, and further comprising: an output unit for outputting the pedaling torque applied to the crankshaft and transmitted via the one-way clutch; andan output shaft for outputting a driving force of the motor;wherein the crankshaft, a drive shaft of the motor, and the output shaft are disposed in sequence; andthe output unit is disposed along the crankshaft, and the one-way clutch and the torque sensor are disposed in sequence from a side opposite to the output unit.
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