Transmission for electric bicycles for detecting a torque and related method for electric bicycles for detecting a torque
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
B62M-003/16
G01D-007/02
출원번호
US-0696524
(2011-04-27)
공개번호
US-0112038
(2013-05-09)
우선권정보
DE-10 2010 028 643.5 (2010-05-06)
국제출원번호
PCT/EP11/56661
(2011-04-27)
§371/§102 date
20130115
(20130115)
발명자
/ 주소
Aydogan, Serdar
Zlindra, Martin
Braun, Sigmund
출원인 / 주소
Aydogan, Serdar
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
A transmission for electric bicycles to detect a torque applied to a pedal crank shaft, includes a pedal crank shaft upon which the torque acts, a hollow shaft configured to connect to an output, through which the pedal crank shaft extends coaxially, and which is supported rotatably with respect to
A transmission for electric bicycles to detect a torque applied to a pedal crank shaft, includes a pedal crank shaft upon which the torque acts, a hollow shaft configured to connect to an output, through which the pedal crank shaft extends coaxially, and which is supported rotatably with respect to the pedal crank shaft, a sensor shaft offset in parallel with respect to the pedal crank shaft and a force sensor connected to the sensor shaft. The transmission includes a drive-side sensor transmission and an output side sensor transmission. The drive-side sensor transmission connects the pedal crank shaft to the sensor shaft and the output-side sensor transmission connects the sensor shaft to the hollow shaft, which is configured to be connected to an output, and the drive-side sensor transmission has a gear ratio which differs from the gear ratio of the output-side sensor transmission. A corresponding method is also described.
대표청구항▼
1-15. (canceled) 16. A transmission for an electric bicycle for detecting a torque that acts upon a pedal crank shaft arrangement, comprising: a pedal crank shaft, upon which the torque acts;an output shaft configured for connection to an output;a sensor shaft offset in parallel with the pedal crank
1-15. (canceled) 16. A transmission for an electric bicycle for detecting a torque that acts upon a pedal crank shaft arrangement, comprising: a pedal crank shaft, upon which the torque acts;an output shaft configured for connection to an output;a sensor shaft offset in parallel with the pedal crank shaft; anda force sensor connected to the sensor shaft, which detects a force exerted by the sensor shaft which corresponds to the torque to be detected;a drive-side sensor transmission; andan output-side sensor transmission;wherein the drive-side sensor transmission connects the pedal crank shaft to the sensor shaft and the output-side sensor transmission connecting the sensor shaft to the output shaft, wherein the output shaft is configured to be connected to an output, and wherein the drive-side sensor transmission has a gear ratio which differs from the gear ratio of the output-side sensor transmission. 17. The transmission of claim 16, wherein the output shaft is configured as a hollow shaft, through which the pedal crank shaft extends coaxially, and which is rotatably supported with respect to the pedal crank shaft. 18. The transmission of claim 16, wherein the drive-side sensor transmission has a drive-side pedal crank shaft wheel, which is situated on the pedal crank shaft and is rigidly connected to it, and has a drive-side sensor shaft wheel, which is situated on sensor shaft and is rigidly connected to it, wherein the drive-side sensor shaft wheel and the pedal crank shaft wheel engage with each other, wherein the output-side sensor transmission includes an output-side hollow shaft wheel, which is situated on the output shaft or the hollow shaft and is rigidly connected to it, and includes an output-side sensor shaft wheel which is situated on the sensor shaft and is rigidly connected to it, and wherein the drive-side sensor shaft wheel and the hollow shaft wheel engages with each other. 19. The transmission of claim 16, wherein the transmission includes a sensor frame in which the sensor shaft is supported rotatably, and the force sensor, between the sensor frame and the housing, is connected indirectly or directly to a bearing element, which supports the pedal crank shaft or the hollow shaft at least partially, or the force sensor being provided between the sensor frame and an area which is also connected to the pedal crank shaft or the hollow shaft in a force-transmitting manner. 20. The transmission of claim 16, further comprising: a sensor frame which is supported in the housing of the transmission with the aid of a bearing and in the sensor frame the sensor shaft being supported rotatably, the force sensor being supported between the sensor frame and the housing of the transmission so that it records the tangential force, which acts upon the sensor frame and prevents a rotational motion of the sensor frame. 21. The transmission of claim 20, wherein the force sensor is situated at a distance from the rotational axis of the sensor frame. 22. The transmission of claim 16, further comprising: a sensor frame in which the sensor shaft is supported rotatably, and the force sensor is situated on the sensor frame, so that it detects the inner forces which act upon the sensor frame. 23. The transmission of claim 22, wherein the sensor frame is rigidly connected to the housing of the transmission. 24. The transmission of claim 16, wherein the drive-side sensor transmission, the output-side sensor transmission or both sensor transmissions have transmission wheels which are configured as a toothed wheel having outer toothings, as outer toothings of the pedal crank shaft, the sensor shaft or the output shaft or hollow shaft, as inner toothings of the pedal crank shaft, the sensor shaft or the output shaft or hollow shaft or a combination of these. 25. The transmission of claim 24, wherein the drive-side sensor transmission is configured by a pair of mutually engaging toothed wheels having outer toothing and the output-side sensor transmission is developed by a pair of mutually engaging toothed wheels, the drive-side or the output-side sensor transmission is configured as a pair of mutually engaging outer toothings, at least one of the two pairs of mutually engaging outer toothings including a toothing, which is configured directly on an outer side of the pedal crank shaft, the sensor shaft or the output shaft or hollow shaft, into which the toothing of a toothed wheel engages, or the drive-side sensor transmission, the output-side sensor transmission or both sensor transmissions are each formed of a pair of toothings, wherein one toothing of the pair is an outer toothing of a toothed wheel, an outer toothing of the pedal crank shaft, of the sensor shaft or of the output shaft or hollow shaft, or an inner toothing of a hollow wheel, and the other toothing of the pair being an outer toothing of a toothed wheel, which is mounted on the pedal crank shaft, the sensor shaft or the output shaft or hollow shaft, or being an outer toothing of the pedal crank shaft, the sensor shaft or the output shaft or hollow shaft itself. 26. The transmission of claim 24, wherein the drive-side sensor transmission is formed by a drive-side crank drive shaft wheel, which is mounted on the pedal crank shaft, and a first inner toothing of a hollow wheel, which forms the sensor shaft as a hollow shaft piece, and the output-side sensor transmission is foamed by an output-side hollow shaft wheel which is situated on the hollow shaft acting as an output shaft, and an additional inner toothing of the hollow wheel, which is offset axially with respect to the first inner toothing, the inner toothings being connected to each other via the hollow wheel and the inner toothings having different radii. 27. The transmission of claim 16, wherein the gear ratio of the drive-side sensor transmission corresponds to the reciprocal of the gear ratio of the output-side sensor transmission. 28. A method for detecting a torque by which a pedal crank shaft is acted upon, the method comprising: transmitting the torque from the pedal crank shaft to a sensor shaft, which is offset in parallel with respect to the pedal crank shaft, via a drive-side sensor transmission;transmitting a corresponding torque from the sensor shaft to an output shaft or hollow shaft, connected to an output, which has the same axis of rotation as the pedal crank shaft, via an output-side sensor transmission, the transmission via the drive-side sensor transmission being provided with a gear ratio which differs from the gear ratio of the output-side sensor transmission;detecting a force that acts upon the sensor shaft, using a force sensor which is connected to the sensor shaft in a force-transmitting manner, wherein the amount of the detected force reflects the strength of the torque. 29. The method of claim 28, wherein the sensor shaft is supported rotatably in a sensor frame, and wherein the force is detected by the force sensor supporting the sensor frame to detect the force which is acted upon the sensor frame by the sensor shaft. 30. The method of claim 28, wherein the torque is transmitted via the sensor transmissions by mutually engaging outer toothings of toothed wheels or by toothed wheels and outer toothings of one of the shafts, the toothings or the toothed wheels forming the sensor transmission by an outer toothing of a toothed wheel or an outer toothing of one of the shafts in an inner toothing of a hollow wheel, which provides the sensor shaft, or a combination thereof.
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