WO2018099482A1 - 自行车五通力矩传感器 - Google Patents

自行车五通力矩传感器 Download PDF

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Publication number
WO2018099482A1
WO2018099482A1 PCT/CN2017/114352 CN2017114352W WO2018099482A1 WO 2018099482 A1 WO2018099482 A1 WO 2018099482A1 CN 2017114352 W CN2017114352 W CN 2017114352W WO 2018099482 A1 WO2018099482 A1 WO 2018099482A1
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WIPO (PCT)
Prior art keywords
bicycle
inner sleeve
elastic sleeve
sleeve
torque sensor
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PCT/CN2017/114352
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English (en)
French (fr)
Inventor
刘钧
刘益闯
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浙江超级电气科技有限公司
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Publication of WO2018099482A1 publication Critical patent/WO2018099482A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/45—Control or actuating devices therefor
    • B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof

Definitions

  • the invention belongs to the technical field of bicycles, and in particular relates to a bicycle five-way torque sensor.
  • the torque sensors for electric bicycles are mainly medium-axis torque sensors, and the central shaft is worn on the frame through the bearing support.
  • the resistance strain gauge is attached to the special middle shaft.
  • the obvious disadvantage is that the shifting kits such as the middle shaft and the crankset cannot be replaced at will, so that the consumers cannot freely change the different bicycle cranksets and shifting kits.
  • the object of the present invention is to overcome the above-mentioned drawbacks of the existing electric bicycle, and to provide a bicycle five-way torque sensor which is simple in structure, convenient in disassembly and assembly, and can be perfectly combined with the frame.
  • the present invention adopts the following technical solution: a bicycle five-way torque sensor, characterized in that the torque sensing mechanism comprises an elastic sleeve and an inner sleeve which are sequentially worn in a five-way pipe of a frame, and the axle is worn in the bicycle.
  • the lower half of the outer circumference of the inner sleeve is provided with a semi-annular protrusion, and the outer side wall of the semi-annular protrusion is closely abutted against the lower part of the inner wall of the elastic sleeve, the elastic sleeve
  • a resistance strain gauge is disposed on a lower portion of the outer circumference, and a through hole is disposed in a lower portion of the five-way tube of the frame, and a signal line connected to the resistance strain gauge is passed through, and the signal line is connected to the bicycle controller.
  • the present invention also includes the following technical features.
  • An annular groove is disposed in a middle portion of the outer circumference of the elastic sleeve, and the resistance strain gauge is fixedly attached to a lower portion of the outer circumference of the elastic sleeve, and the annular groove is disposed to make the elastic sleeve and the inner wall of the five-way tube The gap facilitates the installation of the strain gauge.
  • the thickness of the semi-annular protrusion gradually decreases from the middle to the both ends, so that the lower half of the outer circumference of the inner sleeve is separated from the elastic sleeve by a semi-annular protrusion, thereby forming a gap according to the pedaling force.
  • the two ends of the middle shaft are respectively fixed with a bearing, and the outer ring of the bearing is externally fixed with a nut ferrule, and the nut ferrule is provided with an external thread, and both ends of the inner ring of the inner sleeve are provided with the outer ring
  • the internal thread corresponding to the thread when the middle shaft is worn on the inner sleeve, the nut ferrule at both ends of the middle shaft is screwed with the inner sleeve.
  • the elastic sleeve to which the resistance strain gauge has been attached is tightly pressed into the through hole of the five-way pipe in the downward direction according to the strain gauge. Then, when the inner sleeve is tightly pressed into the downward direction in the direction of the semi-annular projection, the middle shaft passes through the inner sleeve and presses the bearing at both ends between the inner sleeve and the middle shaft, and then passes through The nut ring is screwed and fixed.
  • the human foot When the assembled power-assisted electric bicycle is riding, the human foot will step on the crank pedal mounted on the central shaft, and the downward pressure will be applied to the inner sleeve through the pedaling action. This downward pressure passes through the inner sleeve.
  • the semi-annular projection in the lower middle portion of the outer circumference causes a slight downward deformation of the elastic sleeve in close contact therewith, and the deformation changes by the resistance of the strain gauge attached to the elastic sleeve, and the resistance change will follow
  • the change of the pedaling force changes. When the pedaling force is larger, the resistance value changes more. When the pedaling force is smaller, the resistance value changes less.
  • the controller reads the changed electrical signal to detect the pedaling force. The change in torque.
  • the invention can achieve the following beneficial effects: the invention is perfectly combined with the frame, does not affect the appearance of the vehicle, and can freely install and install most of the bicycle center shafts which can be purchased in various markets according to personal preference.
  • the shifting kit such as the crankshaft crank is convenient and quick to disassemble, and the fitting of the invention has the advantages of simple structure, simple process and low cost.
  • Figure 1 is a schematic cross-sectional view showing the structure of the present invention.
  • Figure 2 is a schematic view of the radial cross-sectional structure of the present invention.
  • Figure 3 is a schematic view showing the structure of the inner sleeve of the present invention.
  • the present invention comprises an elastic sleeve 3 and an inner sleeve 2 in a five-way pipe 1 of the frame.
  • the bicycle middle shaft 8 is inserted into the inner sleeve 2 and mounted by a bearing, and the middle shaft 8 the two ends are respectively fixedly equipped with bearings, the outer ring of the bearing is fixedly provided with a nut ferrule 9 , and the nut ferrule 9 is provided with an external thread, and both ends of the inner ring 2 are provided with the external thread
  • the middle shaft 8 is worn on the inner sleeve 2
  • the nut ferrule 9 at both ends of the middle shaft 8 is screwed with the inner sleeve 2
  • the lower half of the outer circumference of the inner sleeve 2 is provided with a semi-annular projection 4.
  • the thickness of the semi-annular projection 4 gradually decreases from the middle to the both ends, and the outer side wall of the semi-annular projection 4 abuts against the lower portion of the inner wall of the elastic sleeve 3, so that the inner sleeve 2 has the outer lower half.
  • the elastic sleeve 3 is suspended to create a gap, and a structure is formed which is elastically deformed according to the magnitude of the pedaling force.
  • the outer circumference of the elastic sleeve 3 is provided with an annular groove, and the elastic sleeve 3 is provided. Lower outer circle A resistance strain gauge 5 is disposed.
  • a gap between the elastic sleeve 3 and the inner wall of the five-way pipe 1 is provided, and a through hole 7 is formed in a lower portion of the frame five-way pipe 1 for the resistance strain gauge. 5
  • the connected signal line 6 passes through, and the signal line 6 is connected to the bicycle controller.
  • the frame of the bicycle is usually formed by welding the middle tube of the frame, the front tube of the frame, the upper tube of the frame, the lower tube of the frame and the front fork, and the lower end of the lower tube of the frame and the lower end of the middle tube of the frame
  • the connecting portion is welded and fixed with a five-way pipe.
  • the elastic sleeve to which the resistance strain gauge has been attached is tightly pressed into the through hole of the five-way pipe according to the strain gauge in the downward direction, and then The inner sleeve is tightly pressed in the direction of the downward direction of the semi-annular projection, and the middle shaft passes through the inner sleeve and presses the bearing at both ends between the inner sleeve and the middle shaft, and then rotates through the nut sleeve. Press fixed.
  • the human foot will step on the crank pedal mounted on the central shaft, and the downward pressure will be applied to the inner sleeve through the pedaling action.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

一种自行车五通力矩传感器，包括依次穿装于车架五通管内的弹性套管（3）和内套管（2），自行车中轴（8）穿装于内套管内并通过轴承支撑安装，内套管的外圆下半部设置有半环形凸起（4），半环形凸起的外侧壁紧密抵靠于所述弹性套管的内壁下部。弹性套管的外圆下部设置有一电阻应变片（5），车架五通管的下部设置有一通孔（7），用于与电阻应变片连接的信号线（6）穿过，信号线与自行车控制器连接。该传感器配件结构简单，拆装方便快捷，成本低。

Description

自行车五通力矩传感器 技术领域
本发明属于自行车技术领域，尤其与一种自行车五通力矩传感器有关。
背景技术
现有电动自行车以环保、安全、轻便等优点，已经越来越受到全世界人民的欢迎，目前助力电动自行车的力矩传感器主要为中轴力矩传感器，中轴通过轴承支撑穿装于车架五通管内，电阻应变片粘贴于特制的中轴上，其明显的缺点是不能随意更换升级不同型号的中轴及牙盘等变速套件，使得消费者不能自由更换不同的自行车牙盘及变速套件。
发明内容
本发明的目的旨在克服现有电动自行车存在的上述缺陷，提供一种结构简单、拆装方便的且可以与车架完美结合的自行车五通力矩传感器。
为此，本发明采用以下技术方案：自行车五通力矩传感器，其特征是，所述的力矩传感机构包括依次穿装于车架五通管内的弹性套管和内套管，自行车中轴穿装于内套管内并通过轴承支撑安装，内套管的外圆下半部设置有半环形凸起，半环形凸起的外侧壁紧密抵靠于所述弹性套管的内壁下部，弹性套管的外圆下部设置有一电阻应变片，车架五通管的下部设置有一通孔，用于与电阻应变片连接的信号线穿过，信号线与自行车控制器连接。
作为对上述技术方案的补充和完善，本发明还包括以下技术特征。
所述的弹性套管的外圆中部设置有环形凹槽，所述电阻应变片固定粘贴于弹性套管外圆下部，通过设置该环形凹槽，使弹性套管与五通管内壁之间的空隙，方便电阻应变片的安装。
所述的半环形凸起的厚度从中间向两端逐渐变小，使内套管外圆下半部除半环形凸起外与所述弹性套管悬空产生间隙，形成了一根据脚踏力大小而弹性变形的结构。
所述的中轴两端分别固定套装有轴承，轴承的外圈外部固定套装有螺母套圈，螺母套圈设置有外螺纹，所述内套管的内圆两端均设置有与所述外螺纹对应的内螺纹，当中轴穿装于内套管时，中轴两端的螺母套圈与内套管螺纹连接。
本发明装配时，在焊接固定于自行车车架上的五通管的通孔内，将已经粘贴有电阻应变片的弹性套管按照应变片在下方的方向紧配压入五通管的通孔内，再将内套管按照半环形凸起朝向下方的方向紧配压入弹性使用时，中轴穿过内套管并在内套管和中轴之间的两端压入轴承，然后通过螺母套圈旋压固定。当装配好的助力电动自行车骑行时，人脚会踩在安装在中轴上的曲柄脚踏上，通过脚踏动作给内套管以向下的压力，这个向下的压力通过内套管外圆中间下部的半环形凸起使与其紧密接触的弹性套管产生微小的向下变形，该变形通过粘贴于弹性套管上的电阻应变片发生的阻值变化，该阻值变化会随着脚踏力的变化而变化，当脚踏力越大则阻值变化越大，当脚踏力越小则阻值变化越小，通过控制器读取这个变化的电信号从而检测到脚踏力的力矩的变化。
本发明可以达到以下有益效果：通过本发明与车架完美地结合，不影响车辆的外观，可按照个人的喜好自由安装各种市场上能买到的绝大部分自行车中轴及与之相配套的牙盘曲柄等变速套件，而且拆装方便快捷，本发明的配件结构简单，工艺简单，成本低。
附图说明
图1是本发明的结构轴向剖面示意图。
图2是本发明的所述径向剖面结构示意图。
图3是本发明的所述内套管的结构示意图。
具体实施方式
下面结合附图对本发明的具体实施方式进行详细描述。
如图1～图3所示，本发明包括车架五通管1内的弹性套管3和内套管2，自行车中轴8穿装于内套管2内并通过轴承支撑安装，中轴8两端分别固定套装有轴承，轴承的外圈外部固定套装有螺母套圈9，螺母套圈9设置有外螺纹，所述内套管2的内圆两端均设置有与所述外螺纹对应的内螺纹，当中轴8穿装于内套管2时，中轴8两端的螺母套圈9与内套管2螺纹连接，内套管2的外圆下半部设置有半环形凸起4，半环形凸起4的厚度从中间向两端逐渐变小，半环形凸起4的外侧壁紧密抵靠于所述弹性套管3的内壁下部，使内套管2外圆下半部除半环形凸起4外与所述弹性套管3悬空产生间隙，形成了一根据脚踏力大小而弹性变形的结构，弹性套管3的外圆中部设置有环形凹槽，弹性套管3的外圆下部 设置有一电阻应变片5，通过设置该环形凹槽，使弹性套管3与五通管1内壁之间的空隙，车架五通管1的下部设置有一通孔7，用于与电阻应变片5连接的信号线6穿过，信号线6与自行车控制器连接。
本发明装配时，自行车的车架通常由车架中管、车架前管、车架上管、车架下管和前叉焊接固定形成，车架下管的下端和车架中管的下端连接处焊接固定有五通管，在五通管的通孔内，将已经粘贴有电阻应变片的弹性套管按照应变片在下方的方向紧配压入五通管的通孔内，再将内套管按照半环形凸起朝向下方的方向紧配压入弹性使用时，中轴穿过内套管并在内套管和中轴之间的两端压入轴承，然后通过螺母套圈旋压固定。当装配好的助力电动自行车骑行时，人脚会踩在安装在中轴上的曲柄脚踏上，通过脚踏动作给内套管以向下的压力，这个向下的压力通过内套管外圆中间下部的半环形凸起使与其紧密接触的弹性套管产生微小的向下变形，该变形通过粘贴于弹性套管上的电阻应变片发生的阻值变化，该阻值变化会随着脚踏力的变化而变化，当脚踏力越大则阻值变化越大，当脚踏力越小则阻值变化越小，通过控制器读取这个变化的电信号从而检测到脚踏力的力矩的变化。

Claims (3)

  1. 自行车五通力矩传感器，其特征在于：所述的自行车五通力矩传感器包括依次穿装于车架五通管内的弹性套管和内套管，自行车中轴穿装于内套管内，内套管的外圆下半部中间位置设置有半环形凸起，半环形凸起的外侧壁紧密抵靠于所述弹性套管的内壁中间下部，弹性套管的外圆下部设置有一电阻应变片，车架五通管的下部设置有一通孔，用于与电阻应变片连接的信号线穿出，信号线与自行车控制器连接。
  2. 根据权利要求1所述的自行车五通力矩传感器，其特征在于：所述的弹性套管的外圆中部设置有环形凹槽，所述电阻应变片固定粘贴于弹性套管外圆下部。
  3. 根据权利要求2所述的自行车五通力矩传感器，其特征在于：所述的内套管半环形凸起的厚度从中间向两端逐渐变小，使内套管外圆下半部除半环形凸起外与所述弹性套管悬空产生间隙，形成了一根据脚踏力大小而使弹性套管产生相应弹性变形的结构。
PCT/CN2017/114352 2016-12-03 2017-12-02 自行车五通力矩传感器 WO2018099482A1 (zh)

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CN106494559A (zh) * 2016-12-03 2017-03-15 浙江超级电气科技有限公司 自行车五通力矩传感器
CN107021170A (zh) * 2017-05-18 2017-08-08 太仓市悦博电动科技有限公司 一种电动自行车五通及电动自行车

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CN104276251A (zh) * 2014-10-31 2015-01-14 太仓市荣驰电机有限公司 一种电动车中轴力矩传感系统
CN205707131U (zh) * 2016-06-23 2016-11-23 尚林山 曲柄扭矩测量装置及电动自行车和智能自行车
CN106494559A (zh) * 2016-12-03 2017-03-15 浙江超级电气科技有限公司 自行车五通力矩传感器
CN206218129U (zh) * 2016-12-03 2017-06-06 浙江超级电气科技有限公司 自行车五通力矩传感机构

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