WO2018082144A1 - 一种中置电动自行车的倒刹分离装置 - Google Patents

一种中置电动自行车的倒刹分离装置 Download PDF

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Publication number
WO2018082144A1
WO2018082144A1 PCT/CN2016/108016 CN2016108016W WO2018082144A1 WO 2018082144 A1 WO2018082144 A1 WO 2018082144A1 CN 2016108016 W CN2016108016 W CN 2016108016W WO 2018082144 A1 WO2018082144 A1 WO 2018082144A1
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Prior art keywords
shaft
electric bicycle
clutch block
separating device
screw rod
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PCT/CN2016/108016
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English (en)
French (fr)
Inventor
高峰
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太仓市悦博电动科技有限公司
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Publication of WO2018082144A1 publication Critical patent/WO2018082144A1/zh

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L5/00—Brakes, or actuating mechanisms therefor, controlled by back-pedalling
    • B62L5/006—Details

Definitions

  • the invention belongs to the technical field of inverted brakes, and in particular relates to an inverted brake separating device for a mid-mounted electric bicycle.
  • the bicycle brake technology is more and more widely used.
  • the pedal By reversing the brake hub, the pedal is reversely pressed, the chain is reversely moved, and the brake hub is driven to brake.
  • it is also useful for electric vehicles.
  • the motor output of the electric vehicle can be cut off by detecting the brake signal, the inertia of the motor will inevitably continue to drive the electric vehicle forward due to the inertia of the motor. The driving force is great, and the braking effect is greatly reduced.
  • the present invention provides a reverse brake separating device for a mid-mounted electric bicycle, which can be detached from the inertial driving force of the motor in time when the brake is reversed, so that the electric bicycle can be quickly braked.
  • An inverted brake separating device for a mid-mounted electric bicycle comprising a screw rod and a clutch block, the screw rod being mounted on a central shaft, the clutch block being sleeved on the screw rod, the clutch block One side of the clutch is fixedly coupled to the sprocket bracket, and the inner ring of the clutch block is threadedly engaged with the outer ring of the screw rod, and the outer ring of the clutch block is in frictional engagement with the motor output portion.
  • the motor output portion is in rolling connection with a portion of the center shaft or the screw outer ring.
  • the rolling connection is a bearing connection
  • at least one of the bearings is a thrust bearing.
  • the lead screw is a single-head screw or a multi-head screw.
  • a speed sensor is further included, the speed sensor collects a rotational speed of the central axis to a motor controller
  • central axis is a uniaxial structure or a left and right axis structure.
  • central shaft is a single-axis structure
  • lead screw is fixedly mounted on a single shaft.
  • the central axis is a left-right shaft structure, a part of the right shaft is inserted into the left shaft, and an end of the insertion portion is fixedly connected with an inner portion of the left shaft, and a part of the screw shaft is slidably engaged with the right shaft, and the other portion is The left axis is fixedly connected.
  • a torque sensor is further included, the torsion sensor is mounted on the surface of the single shaft, and the torque sensor collects the single-axis torsional signal to the motor controller.
  • a torque sensor is further included, the torque sensor is mounted on a surface of the left shaft, and the torque sensor collects a torsional signal of the left shaft to a motor controller.
  • the invention has the beneficial effects that: through a set of separating devices, the inertial driving force of the motor is released in time when the brake is reversed, and a good reverse braking effect is obtained on the central electric bicycle.
  • the sensor is a torque sensor or a speed sensor, which makes the collected signal more sensitive and flexible.
  • the outer ring of the clutch block is a friction surface, so that the clutch block can better contact the motor output portion.
  • FIG. 1 is a schematic structural view showing an outer ring of a clutch block and a motor output portion when the shaft is a left-right shaft structure according to the present invention
  • FIG. 2 is a schematic structural view showing the separation of the outer ring of the clutch block and the motor output portion when the shaft is a single-axis structure according to the present invention
  • FIG. 3 is a schematic structural view of the outer ring of the clutch block and the motor output portion when the shaft is a single-axis structure according to the present invention
  • the embodiment adopts a central electric bicycle equipped with a motor on one side to illustrate, as shown in FIG. 1 , a reverse brake separating device for a mid-mounted electric bicycle, comprising a screw rod 1 and a clutch block 2, and the screw rod 1 is fixedly installed therein On the shaft, wherein the middle shaft is a left-right shaft structure, and the left shaft 3 and the right shaft 4 are combined.
  • a portion of the right shaft 4 is slidably engaged with the inner ring of the screw shaft 1, the end portion being the crank connecting end 7, and the other portion being inserted into the inside of the left shaft 3, and the end portion of the insertion portion being fixedly coupled to the inside of the left shaft 3.
  • One end of the left shaft 3 is mounted with a left crank, the other part is sleeved on the right shaft 4, and the end portion is fixedly connected with the inner ring of the screw rod 1;
  • the clutch block 2 is sleeved on the screw rod 1, and one side of the clutch block 2 is fixedly connected with the sprocket bracket 6.
  • the clutch block 2 and the sprocket bracket 6 can be fixedly connected by screws, or can be integrated into an integrated structure, and the present invention does not Specific restrictions.
  • the inner ring of the clutch block 2 is threadedly engaged with the outer ring of the screw rod 1.
  • the outer ring of the clutch block 2 is frictionally engaged with the motor output portion 5, and the outer ring of the clutch block 2 is a friction surface, which can make the clutch block 2 and the motor output. Part 5 is in close contact.
  • the motor output 5, that is, the central motor is electrically driven by a one-way clutch, which is connected by rolling to a central shaft or a part of the outer circumference of the screw, the rolling connection is usually a bearing or a ball In a manner, the motor output portion comes into contact with the clutch 2 when the electric drive is advanced, and drives the electric vehicle to advance.
  • the lead screw is a single-head screw, preferably a multi-head screw.
  • the advantage of the multi-head screw is that the clutch block 2 can be quickly brought into contact with or separated from the motor output portion 5 with a small angle of rotation.
  • the sensor can be a torque sensor or a speed sensor.
  • the torque sensor is mounted on the surface of the left shaft 3, and the torque sensor collects the shaft torque signal to the motor controller.
  • the speed sensor is used to detect the rotation speed of the middle shaft, and the implementation manner is not limited.
  • the magnetic steel can be set on the middle shaft, and the Hall sensor is set at a corresponding position to detect the rotation speed of the left shaft 3 or the right shaft 4.
  • the motor rotor is connected to the outer ring of the one-way ratchet 8 via a speed reduction mechanism, and the inner ring of the one-way ratchet 8 is connected to the motor output portion 5.
  • a part of the outer ring of the lead screw 1 is connected to the motor output portion 5 via a bearing, and the bearing is one or more, at least one of which is a thrust bearing for supporting the axial force between the motor output portion 5 and the lead screw 1.
  • the one-way ratchet 8 can also adopt any one-way clutch structure.
  • the speed sensor is used to detect that the pedaling force causes the center shaft to rotate, and the rotation speed signal is used to control the output or stop of the motor.
  • a reverse brake separation device for a center-mounted electric bicycle includes a screw rod 1 and a clutch block 2, and the screw rod 1 is mounted on On the central axis, the middle axis is a single axis structure, that is, the central axis is one axis. That is, the screw 1 is fixedly mounted on the single shaft 10.
  • the clutch block 2 is sleeved on the screw rod 1, and one side of the clutch block 2 is fixedly connected with the sprocket bracket 6.
  • the clutch block 2 and the sprocket bracket 6 can be fixedly connected by screws, or can be integrated into an integrated structure, and the present invention does not Specific restrictions.
  • the inner ring of the clutch block 2 is threadedly engaged with the outer ring of the screw rod 1.
  • the outer ring of the clutch block 2 is frictionally engaged with the motor output portion 5, and the outer ring of the clutch block 2 is a friction surface, which can make the clutch block 2 and the motor output. Part 5 is in close contact.
  • the lead screw is a single-head screw, preferably a multi-head screw.
  • the sensor can be a torque sensor or a speed sensor.
  • the torque sensor is mounted on the surface of the single shaft 10, and the sensor collects the shaft torque signal to the motor controller.
  • the speed sensor is used to detect the rotation speed of the middle shaft, and the implementation manner is not limited.
  • the magnetic steel can be set on the single shaft 10, and the Hall sensor is set at the corresponding position to detect the rotation speed of the middle shaft.
  • the motor rotor is connected to the outer ring of the one-way ratchet 8 via a speed reduction mechanism, and the inner ring of the one-way ratchet 8 is connected to the motor output portion 5.
  • a part of the outer ring of the lead screw 1 is connected to the motor output portion 5 via a bearing, and the bearing is one or more, at least one of which is a thrust bearing for supporting the axial force between the motor output portion 5 and the lead screw 1.
  • the one-way ratchet 8 can also adopt any one-way clutch structure.
  • the crank When driving, the crank is stepped forward, the single shaft 10 is rotated, the screw 1 fixed on the central shaft rotates, and the clutch is moved to the left by the screw, as shown in FIG. 3, the friction surface of the clutch 2 and the motor output portion 5 Engagement; at the same time, since the single shaft 10 is twisted by the pedaling force, it is mounted on the single shaft 10
  • the torque sensor sends a signal to the controller (or, by detecting the single shaft 10 is subjected to the pedaling force rotation speed, the speed sensor sends a signal to the controller), the motor operates, the motor driving force passes through the speed reduction mechanism, the one-way ratchet 8, and the motor output portion 5
  • the clutch block 2 is transmitted to the sprocket bracket 6 to drive the electric vehicle to travel, and the human power and the electric power drive the electric vehicle together.
  • the maniper When the brake is required, the maniper is stepped on the crank, the single shaft 10 is reversely rotated, and the screw 1 fixed on the single shaft 10 is reversely rotated, and the clutch block 2 is moved to the right by the screw, as shown in FIG.
  • the friction surface is disengaged from the motor output portion.
  • the clutch block 2 rotates in the reverse direction
  • the sprocket support 6 rotates in the reverse direction
  • the drive chain moves in the opposite direction, so that the brake brake wheel mounted on the rear wheel brakes.
  • the sensor mounted on the single shaft 10 sends a reverse signal to the controller, the motor stops driving, and the inertial motion of the motor and the speed reduction mechanism is separated by the clutch 2, no longer acts on the chain, and the reverse brake is successfully completed.
  • the motor can be installed by concentric coaxial or one side
  • the speed reduction mechanism can be decelerated by planetary gears or other gear and chain deceleration structures
  • the central shaft can adopt a single-axis structure or a left-right shaft structure.
  • the sensor may be a variety of torque sensors or speed sensors. It should be noted that many variations and modifications may be made by those skilled in the art without departing from the inventive concept. The scope of protection of the invention. Therefore, the scope of the invention should be determined by the appended claims.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Transmission Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Braking Arrangements (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)

Abstract

一种中置电动自行车的倒刹分离装置，包括丝杆（1）和离合块（2），所述丝杆（1）安装在中轴上，所述离合块（2）套在所述丝杆（1）上，所述离合块（2）的一侧与链轮支架（6）固定连接，所述离合块（2）的内圈与所述丝杆（1）的外圈呈螺纹配合，所述离合块（2）的外圈与电机输出部（5）呈摩擦配合；通过该分离装置，在倒刹时及时脱离电机的惯性驱动力，在中置电动自行车上取得了良好的倒刹效果。

Description

一种中置电动自行车的倒刹分离装置 技术领域
本发明属于倒刹技术领域，尤其涉及一种中置电动自行车的倒刹分离装置。
背景技术
现在自行车的倒刹技术应用越来越广了，通过倒刹轮毂，将脚踏板反向踩下，链条反向运动，驱动倒刹轮毂进行刹车制动。目前也有用在电动车上的尝试，但是虽然可以通过检测倒刹信号来切断电动车的电机输出，然而由于电机的惯性运转，不可避免使得电机惯性力继续驱动电动车前行，倒刹轮毂受到的该前行力很大，刹车效果大打折扣。
发明内容
有鉴于此，为了克服现有技术的不足本发明提供一种中置电动自行车的倒刹分离装置，在倒刹时及时脱离电机的惯性驱动力，使得电动自行车能够快速制动。
为了实现上述技术目的，本发明采用以下技术方案：
一种中置电动自行车的倒刹分离装置，该倒刹分离装置包括丝杆和离合块，所述丝杆安装在中轴上，所述离合块套在所述丝杆上，所述离合块的一侧与链轮支架固定连接，所述离合块的内圈与所述丝杆的外圈呈螺纹配合，所述离合块的外圈与电机输出部呈摩擦配合。
进一步，所述电机输出部与中轴或丝杆外圈的一部分滚动连接。
进一步，所述滚动连接是轴承连接，至少其中一个轴承为推力轴承。
进一步，所述丝杆为单头丝杆或多头丝杆。
进一步，还包括速度传感器，所述速度传感器采集所述中轴的转动速度给电机控制器
进一步，所述中轴为单轴结构或左右轴结构。
进一步，所述中轴为单轴结构，所述丝杆固定安装在单轴上。
进一步，所述中轴为左右轴结构，右轴的一部分插入左轴内部，并且该插入部分的端部与左轴的内部固定连接，所述丝杆一部分与右轴是滑动配合，另一部分与左轴固定连接。
进一步，还包括扭力传感器，所述扭力传感器安装在所述单轴的表面，所述扭力传感器采集所述单轴的扭变信号给电机控制器。
进一步，还包括扭力传感器，所述扭力传感器安装在所述左轴的表面，所述扭力传感器采集所述左轴的扭变信号给电机控制器。
本发明的有益效果为：通过一套分离装置，在倒刹时及时脱离电机的惯性驱动力，在中置电动自行车上取得了良好的倒刹效果。
1)丝杆的外圈与离合块的内圈呈螺纹配合，当中轴转动时，丝杆也一并转动，当丝杆顺时针转动或逆时针转动时，带动离合块向左运动或向右运动，离合块能够与电机输出部接触或分离，从而实现快速制动。
2)传感器为扭力传感器或速度传感器，能够使所采集的信号更加灵敏和灵活。
3)离合块的外圈为摩擦面，使得离合块能够更好的与电机输出部相接触。
附图说明
图1为本发明中轴为左右轴结构时离合块的外圈与电机输出部向接触的结构示意图；
图2为本发明中轴为单轴结构时离合块的外圈与电机输出部分离的结构示意图；
图3为本发明中轴为单轴结构时离合块的外圈与电机输出部相接触的结构示意图；
其中，1、丝杆；2、离合块；3、左轴；4、右轴；5、电机输出部；6、链轮支架；7、曲柄连接端；8、单向棘轮；9、电机转子；10、单轴。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
第一实施例
该实施列采用一侧安装电机的中置电动自行车来说明，如图1所述，一种中置电动自行车的倒刹分离装置，包括丝杆1和离合块2，丝杆1固定安装在中轴上，其中，中轴为左右轴结构，由左轴3和右轴4组合而成。右轴4的一部分与丝杆1的内圈滑动配合，端部是曲柄连接端7，另一部分插入左轴3内部，并且该插入部分的端部与左轴3的内部固定连接。左轴3一端安装左曲柄，另一部分套在所述的右轴4上，并且端部与所述的丝杆1的内圈固定连接；
离合块2套在丝杆1上，离合块2的一侧与链轮支架6固定连接，离合块2与链轮支架6可以通过螺丝固定连接，也可以做成一体的结构，本发明不做具体的限制。
离合块2的内圈与丝杆1的外圈呈螺纹配合，离合块2的外圈与电机输出部5呈摩擦配合，离合块2的外圈为摩擦面，能够使离合块2与电机输出部5紧密相接触。所述的电机输出部5，也就是中置电机电力驱动通过单向离合器来驱动的一个部件，该部件通过滚动连接到中轴或者丝杆外圈的一部分上，滚动连接通常是用轴承或者滚珠的方式，该电机输出部在电力驱动前行时与离合块2接触，驱动电动车前行。
丝杆为单头丝杆，优选多头丝杆，多头丝杆的优点为：只需很小的旋转角度就能够快速使离合块2与电机输出部5相接触或者分离。
传感器可以为扭力传感器或速度传感器。扭力传感器安装在左轴3的表面，扭力传感器采集中轴扭力信号给电机控制器。速度传感器用来检测中轴转动速度，实现方式不限，例如可以通过中轴上设置磁钢，霍尔传感器设置在相对应的位置，来检测左轴3或者右轴4的转速。
此外，电机转子通过减速机构连接单向棘轮8的外圈，单向棘轮8的内圈与电机输出部5连接。丝杆1外圈的一部分与电机输出部5通过轴承连接，所述轴承为一个或者多个，至少其中一个轴承为推力轴承，用来承受电机输出部5与丝杆1之间的轴向力。其中单向棘轮8也可以采用任何一种单向离合器的结构。
实施步骤如下：
行驶时，右脚向前踩踏曲柄，右轴4转动，踩踏力输入到右轴4另一端，因该端与左轴3内部固定连接，扭力传递给左轴3，左轴3继续将该踩踏力传递给与之固定连接的丝杆1，丝杆1转动，驱动离合块2接触电机输出部5。在上述过程中，因左轴3受到扭力，安装在其表面的扭力传感器发出信号给电机，电机启动，输出驱动力通过减速机构、单向棘轮8给电机输出部5。因此，人力和电力共同作用在离合块2上，驱动电动车行驶，人力和电力一起驱动电动车前行。
另外，如左脚向前踩踏曲柄，踩踏力直接通过左轴3传递给与之固定连接的丝杆1，后续过程同上。
需要倒刹时，右脚向后踩踏曲柄，右轴4反向转动，踩踏力输入到右轴4另一端，因该端与左轴3内部固定连接，扭力传递给左轴3，左轴3继续将该踩踏力传递给与之固定连接的丝杆1，丝杆1转动，驱动离合块2分离电机输出部5。在上述过程中，因左轴3受到反向扭力，安装在其表面的扭力传感器发出信号给电机，电机停止输出，并且电机及减速机构的惯性运动被离合块分离，不再作用在链条上，倒刹顺利完成。
另外，如左脚向后踩踏曲柄，踩踏力直接通过左轴3传递给与之固定连接的丝杆1，后续过程同上。
在上述控制过程中，除了通过扭力传感器检测踩踏力外，同样可以利 用速度传感器来检测，踩踏力使得中轴转动，通过该转动速度信号来控制电机的输出或停止。
第二实施例
该实施列用同心同轴的中置电动自行车来说明，如图2和图3所述，一种中置电动自行车的倒刹分离装置，包括丝杆1和离合块2，丝杆1安装在中轴上，其中，中轴为单轴结构，即中轴为一根轴。即丝杆1固定安装在单轴10上。
离合块2套在丝杆1上，离合块2的一侧与链轮支架6固定连接，离合块2与链轮支架6可以通过螺丝固定连接，也可以做成一体的结构，本发明不做具体的限制。
离合块2的内圈与丝杆1的外圈呈螺纹配合，离合块2的外圈与电机输出部5呈摩擦配合，离合块2的外圈为摩擦面，能够使离合块2与电机输出部5紧密相接触。
丝杆为单头丝杆，优选多头丝杆。
传感器可以为扭力传感器或速度传感器。扭力传感器安装在单轴10的表面，传感器采集中轴扭力信号给电机控制器。速度传感器用来检测中轴转动速度，实现方式不限，例如可以通过单轴10上设置磁钢，霍尔传感器设置在相对应的位置，来检测中轴的转速。
此外，电机转子通过减速机构连接单向棘轮8的外圈，单向棘轮8的内圈与电机输出部5连接。丝杆1外圈的一部分与电机输出部5通过轴承连接，所述轴承为一个或者多个，至少其中一个轴承为推力轴承，用来承受电机输出部5与丝杆1之间的轴向力。其中单向棘轮8也可以采用任何一种单向离合器的结构。
实施步骤如下：
行驶时，向前踩踏曲柄，单轴10转动，固定在中轴上的丝杆1旋转，通过螺纹驱动离合块向左移动，如图3所示，离合块2的摩擦面与电机输出部5接合；同时，由于单轴10受到踩踏力产生扭变，安装在单轴10上 的扭力传感器发出信号给控制器(或者，通过检测单轴10受到踩踏力转动速度，速度传感器发出信号给控制器)，电机工作，电机驱动力通过减速机构、单向棘轮8、电机输出部5、离合块2传递到链轮支架6上，驱动电动车行驶，人力和电力一起驱动电动车前行。
需要倒刹时，人力向后踩踏曲柄，单轴10反向转动，固定在单轴10上的丝杆1反向旋转，通过螺纹驱动离合块2向右移动，如图2所述离合块的摩擦面与电机输出部脱离，同时，离合块2反向转动，链轮支架6反向转动，驱动链条反向运动，导致安装在后轮上的倒刹轮毂进行刹车制动。同时，安装在单轴10上的传感器发出反向信号给控制器，电机停止驱动，并且电机及减速机构的惯性运动被离合块2分离，不再作用在链条上，倒刹顺利完成。
以上所述实施例仅表达了本发明的实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。可以采用不同的组合方式来实施本发明，如电机可以采用同心同轴安装或者一侧安装，减速机构可以通过行星轮减速或者其他齿轮、链条减速结构，中轴可以采用单轴结构或者左右轴结构，传感器可以采用各种扭矩传感器或者速度传感器，应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。
Figure PCTCN2016108016-appb-000001
Figure PCTCN2016108016-appb-000002
Figure PCTCN2016108016-appb-000003

Claims (10)

  1. 一种中置电动自行车的倒刹分离装置，其特征在于：该倒刹分离装置包括丝杆和离合块，所述丝杆安装在中轴上，所述离合块套在所述丝杆上，所述离合块的一侧与链轮支架固定连接，所述离合块的内圈与所述丝杆的外圈呈螺纹配合，所述离合块的外圈与电机输出部呈摩擦配合。
  2. 根据权利要求1所述的中置电动自行车的倒刹分离装置，其特征在于：所述电机输出部与中轴或丝杆外圈的一部分滚动连接。
  3. 根据权利要求2所述的中置电动自行车的倒刹分离装置，其特征在于：所述滚动连接是轴承连接，至少其中一个轴承为推力轴承。
  4. 根据权利要求1所述的中置电动自行车的倒刹分离装置，其特征在于：所述丝杆为单头丝杆或多头丝杆。
  5. 根据权利要求1所述的中置电动自行车的倒刹分离装置，其特征在于：还包括速度传感器，所述速度传感器采集所述中轴的转动速度给电机控制器。
  6. 根据权利要求1所述的中置电动自行车的倒刹分离装置，其特征在于：所述中轴为单轴结构或左右轴结构。
  7. 根据权利要求1所述的中置电动自行车的倒刹分离装置，其特征在于：所述中轴为单轴结构，所述丝杆固定安装在单轴上。
  8. 根据权利要求1所述的中置电动自行车的倒刹分离装置，其特征在于：所述中轴为左右轴结构，右轴的一部分插入左轴内部，并且该插入部分的端部与左轴的内部固定连接，所述丝杆一部分与右轴是滑动配合，另一部分与左轴固定连接。
  9. 根据权利要求7所述的中置电动自行车的倒刹分离装置，其特征在于：还包括扭力传感器，所述扭力传感器安装在所述单轴的表面，所述扭力传感器采集所述单轴的扭变信号给电机控制器。
  10. 根据权利要求8所述的中置电动自行车的倒刹分离装置，其特征 在于：还包括扭力传感器，所述扭力传感器安装在所述左轴的表面，所述扭力传感器采集所述左轴的扭变信号给电机控制器。
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