WO2019091180A1

WO2019091180A1 - Mid-drive motor using dynamic sensor circuit combination

Info

Publication number: WO2019091180A1
Application number: PCT/CN2018/101363
Authority: WO
Inventors: 张斌; 董超祺; 董健
Original assignee: 广州市展辉电子有限公司
Priority date: 2017-11-08
Filing date: 2018-08-20
Publication date: 2019-05-16
Also published as: CN107672732A

Abstract

A dynamic sensor circuit combination and a mid-drive motor using the circuit combination. The circuit combination comprises a transmission feedback circuit and a reception and collection circuit. The mid-drive motor comprises a drive device (1) and a linkage device (2). The drive device (1) drives the linkage device (2). The linkage device (2) comprises a gearbox (21), a middle shaft (25), and a protective housing (27). The gearbox (21) is fixedly connected to the protective housing (27). The middle shaft (25) is placed in the protective housing (27). A torsion housing (26) is sleeved on the middle shaft (25). The torsion housing (26) is fixedly connected to the middle shaft (25). The transmission feedback circuit is disposed on the inner wall of the protective housing (27). The reception and collection circuit is disposed on the torsion housing (26). By using a bottom bracket of a general vehicle frame, a bicycle rider can mount the mid-drive motor using the dynamic sensor circuit combination in a DIY manner, and the general bicycle is refitted into an electric bicycle; and the mid-drive motor using the dynamic sensor circuit combination can also be used for mass production and mounting in an electric bicycle manufacturing plant.

Description

Center motor using dynamic sensor circuit combination

Technical field

The invention belongs to the technical field of electric bicycles, and in particular to a center motor using a combination of dynamic sensor circuits.

Background technique

Bicycles with auxiliary electric motors are usually equipped with front wheel motors, rear wheel motors or center motors, which are collectively referred to as "electric bicycles" or "eBicycles" or "eBikes".

For front and rear wheel motors, they are hub motors and are manufactured to form part of the front and rear wheels of the bicycle, respectively. For the center motor, which is part of the central axle drive system of the electric bicycle, the electric bicycle is driven by the use of a power source to drive the motor, which is generally mounted in the lower middle portion of the electric bicycle.

technical problem

At present, the most practical way to install a mid-mounted motor on a bicycle is to use the five-way pipe of the bicycle. Usually, install it by following the steps below: first insert the gear shaft into the five-way pipe, then use the additional bracket to move the gear shaft and The shaft of the center motor is kept parallel, ensuring the normal operation of the center motor and the gear box. Then use the connecting bridge and the clamp to stabilize the center motor on the seat post or the lower fork to prevent it from swinging back and forth. Finally, use the five links. The nut of the tube secures the gearbox to the five-way tube.

The installation of the center-mounted motor on the market generally requires a special frame to be matched. Otherwise, it needs to be modified on the existing frame five-way to make it fit the installation of the center-mounted motor. This installation method is difficult and requires Professional and technical personnel operate, and cannot be DIY by the user. In addition, due to the space limitation of the frame, the torque sensor for setting the bilateral shaft torsion deformation in the shaft of the gearbox of the center motor is limited. Therefore, the axial torsion deformation torque sensor of the current DIY center motor can only be used. Mounted on the side of the center axle, it is a one-sided torque sensing.

Technical solution

The technical problem to be solved by the present invention is to provide a center-mounted motor that can be applied to a general bicycle frame five-way, which is convenient for a user to independently convert a bicycle into an electric bicycle.

The technical solution of the present invention to solve the above technical problem is:

A circuit assembly of a dynamic sensor, comprising a transmitting feedback circuit and a receiving and collecting circuit, the transmitting feedback circuit comprising an inductor L1, the receiving and collecting circuit comprising an inductor L3, the inductor L1 corresponding to the inductor L3 and inductively linked to each other .

Specifically, the transmit feedback circuit further includes a clock signal generation loop, a power amplification loop, a signal detection loop, a low pass filter loop, a signal shaping amplification loop, a signal output loop and a capacitor C1, the clock signal generating loop, and the power An amplification circuit, the inductor L1, the signal detection loop, the low-pass filter loop, the signal shaping amplification loop, and the signal output loop are sequentially and electrically connected, the clock signal generation loop, the power amplification a loop, the signal detection loop, the low pass filter loop and the signal shaping amplifier loop are powered by a DC power source VCC, the inductor L1 is connected in series with the capacitor C1, and the inductor L1 forms a resonant loop with the capacitor C1 .

Specifically, the receiving and collecting circuit further includes a power resonant circuit, a rectifying circuit, a unidirectional loop, a filtering loop, a voltage stabilizing loop, a strain signal collecting loop, a strain signal amplifying loop, a voltage transition frequency loop, and a signal modulation output loop, The inductor L3, the power co-integration loop and the rectifying loop are sequentially and sequentially electrically connected, and the rectifying loop is electrically connected to the unidirectional loop and the signal modulation output loop, respectively, and the unidirectional loop is filtered. a loop is electrically connected to the voltage stabilizing loop, wherein the voltage stabilizing loop is electrically connected to the strain signal acquisition loop, the strain signal amplifying loop, and the voltage transition frequency loop, respectively, the strain signal acquisition loop, the strain The signal amplifying loop is electrically connected to the voltage conversion frequency loop in sequence, and the voltage transition frequency loop is electrically connected to the signal modulation output loop.

Specifically, the transmitting feedback circuit and the receiving and collecting circuit are in a relationship between a stator and a rotor, the transmitting feedback circuit is fixed, and the receiving and collecting circuit performs 360° rotation around the transmitting feedback circuit.

The invention also discloses a center motor using the above dynamic sensor circuit combination, comprising a driving device and a linkage device, the driving device driving the linkage device, the linkage device comprising a gear box, a middle shaft and a protective sleeve, The gear box is fixedly connected to the protection box, the middle shaft is placed in the protective sleeve, and the middle shaft is sleeved with a torque sleeve, and the torque sleeve is fixedly connected with the central shaft, and the emission is A feedback circuit is disposed on an inner wall of the protective sleeve, and the receiving and collecting circuit is disposed on the torsion sleeve.

Specifically, the driving device includes a casing and a driving shaft, the driving shaft is located at a center position of the casing, and an end of one end of the driving shaft penetrates to the outside of the casing, and the linkage device further includes a linkage disc, a flange bearing and a chain disc, wherein the linkage disc is placed in the gear box, the flange bearing is placed at a center position of the gear box and can perform a circular motion according to a central axis of the gear box, the flange a bearing sleeve is disposed on the central shaft and coincides with the torsion sleeve, the end portion is tangentially twisted and mounted with the linkage disc, and the linkage disc is sleeved on the flange bearing and fixed to each other. The chain plate is disposed on an outer side of the gear box and is fixed to an end surface of the flange bearing, and the flange bearing is a one-way flange bearing.

Specifically, the torsion sleeve is provided with a receiving skeleton, a torque sensor, a power receiving coil and a receiving circuit board, the receiving frame is fixedly connected to the torque sleeve and the central shaft, and the torque sensor is fixed on the receiving skeleton a central portion, the power receiving coil is fixed at a tail portion of the receiving bobbin, the receiving circuit board is fixed on the receiving bobbin, and the torque sensor, the power receiving coil is electrically connected to the receiving circuit board, The torque sensor is a stress sensor.

Preferably, the inner surface of the torsion sleeve is provided with an internal spline, and the central shaft is provided with an external spline which is matched with the internal spline, and the internal spline is nested with the external spline And fixed to each other, the receiving skeleton jacket is provided with three anti-sleeve sleeves.

Specifically, the inner surface of the protective cover is provided with an emission skeleton, the emission skeleton surrounds the inner surface of the protective cover, and one end of the emission skeleton is provided with a power transmitting coil, and the power transmitting coil and the power receiving coil are Correspondingly, the transmitting skeleton is further provided with a transmitting circuit board.

Specifically, the torsion sleeve is provided with a plurality of grooves, and the groove is correspondingly mounted with a ratchet pawl, and the flange bearing is internally provided with a toothed ratchet seat, and the ratchet pawl and the toothed ratchet seat are In the matching, one end of the ratchet pawl is movably connected to the torsion sleeve, and the other end is suspended. The middle of the ratchet pawl is connected to the groove recess by a spring.

Preferably, the central shaft is provided with a speed magnet, and the inner surface of the protective sleeve is provided with a speed sensor, and the speed sensor corresponds to the speed magnet.

Preferably, the utility model further comprises a sprocket crank which is fixed on the end face of the flange bearing, and the chain disc is fixed on the sprocket of the sprocket.

Specifically, a first bearing is disposed between the end of the flange bearing and the central shaft, and a second bearing is disposed between the torsion sleeve and the central shaft, the flange bearing and the gear a third bearing is disposed between the box, a fourth bearing is disposed between the tail of the protective sleeve and the central shaft, and the fifth shaft and the second end are respectively disposed at the rear end and the front end of the driving shaft and the housing Six bearings. A seventh bearing is disposed at the intersection of the drive shaft and the gearbox.

Beneficial effect

The invention has the following beneficial effects: the dynamic sensor circuit combination can realize the simultaneous transmission of the power energy of the same group coil and the sensing signal of the dynamic sensor, so that the center motor can allow the bicycle cyclist to utilize the five-way of the general frame (ie There is no need to use a special frame. The center motor with a built-in dynamic torque and speed sensor gearbox shaft is installed in DIY mode, and the general bicycle is converted into an electric bicycle. It can also be used for mass production installation by the electric bicycle manufacturer. Coaxial installation, coaxial output, single-stage helical gear parallel transmission, gearbox and protective sleeve are integrally die-casted to ensure coaxial drive of the drive shaft/linking plate/middle axis; coaxial output is realized by single-stage deceleration structure It effectively reduces the size of the motor and has little effect on the overall appearance of the bicycle. From the perspective of the overall appearance of the vehicle, the similarity with the bicycle is very high. The one-way flange bearing is used to effectively solve the load feeling when the motor rotor rotates while riding.

DRAWINGS

1 is a connection block diagram of a circuit combination of the present invention;

2 is a connection block diagram of a transmitting feedback circuit of the present invention;

3 is a connection block diagram of a receiving and collecting circuit of the present invention;

4 is a schematic perspective view showing the structure of a central motor according to the present invention;

Figure 5 is a schematic view showing the internal structure of the central motor of the present invention;

Figure 6 is a schematic view showing the installation structure of the flange bearing, the torque sleeve and the middle shaft of the present invention;

Figure 7 is a schematic view showing the assembly structure of the shaft, the protective sleeve and the torsion sleeve of the present invention;

Figure 8 is a schematic view showing the internal structure of the protective cover of the present invention;

Figure 9 is a timing diagram of the operation of the circuit combination of the present invention generated during its application.

The meanings of the serial numbers in the drawings are as follows:

1 drive unit, 11 housing, 111 fifth bearing, 112 sixth bearing, 12 drive shaft, 121 end, 122 seventh bearing, 13 power cord, 2 linkage, 21 gearbox, 22 linkage disc, 23 flange Bearing, 231 toothed ratchet seat, 232 end face, 233 third bearing, 24 chain plate, 241 chain disc crank, 242 first bearing, 25 center shaft, 251 speed magnet, 252 outer spline, 26 torque sleeve, 261 groove , 262 ratchet pawl, 263 torque sensor, 264 receiving bobbin, 265 power receiving coil, 266 inner spline, 267 three anti-sleeve, 268 second bearing, 27 protective sleeve, 271 launch skeleton, 272 power transmitting coil, 273 speed sensor, 274 leads the cable, 275 fourth bearing.

Embodiments of the invention

The invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1-3, a circuit assembly of a dynamic sensor according to an embodiment of the present invention includes a transmit feedback circuit and a receive and receive circuit, and the transmit feedback circuit includes an inductor L1, a clock signal generation loop, a power amplification loop, and a signal detection loop. a low-pass filter circuit, a signal shaping amplification circuit, a signal output circuit and a capacitor C1, the clock signal generation circuit, the power amplification circuit, the inductor L1, the signal detection circuit, the low-pass filter circuit, The signal shaping amplification loop and the signal output loop are sequentially and sequentially electrically connected, the clock signal generation loop, the power amplification loop, the signal detection loop, the low pass filter loop and the signal shaping amplification loop pass The DC power supply VCC is powered, the inductor L1 is connected in series with the capacitor C1, and the inductor L1 forms a resonant circuit with the capacitor C1 for radiating power to the outside. The receiving and collecting circuit comprises an inductor L3, a power resonant loop, and a rectifying loop. , one-way loop, filter loop, voltage regulator loop, strain signal acquisition loop, strain signal amplification loop, voltage Transforming a frequency loop and a signal modulation output loop, the inductor L3, the power resonant loop and the rectifying loop are sequentially and sequentially electrically connected, and the rectifying loop is electrically connected to the unidirectional loop and the signal modulation output loop respectively The one-way loop is electrically connected to the voltage stabilization loop via the filter loop, and the voltage regulator loop is electrically connected to the strain signal acquisition loop, the strain signal amplification loop, and the voltage transition frequency loop, respectively. The strain signal acquisition loop, the strain signal amplification loop and the voltage conversion frequency loop are sequentially and sequentially electrically connected, and the voltage transition frequency loop is electrically connected to the signal modulation output loop, and the inductor L1 and the inductor L3 corresponds to each other and is inductively linked to each other.

The transmitting feedback circuit and the receiving and collecting circuit are a relationship between a stator and a rotor, the transmitting feedback circuit is fixed, and the receiving and collecting circuit performs 360° rotation around the transmitting feedback circuit, and the connecting manner is mainly through an inductor. The magnetic force between L1 and inductor L3 induces the communication of the loop.

As shown in FIG. 4-8, a center-mounted motor according to an embodiment of the present invention includes a driving device 1 and a linkage device 2, and the driving device 1 drives the linkage device 2, and the driving device 1 is externally connected with a power cord 13 For providing power to the entire mid-mounted motor, the linkage 2 includes a gearbox 21, a center shaft 25 and a protective sleeve 27, the gearbox 21 being fixedly coupled to the protective box, the central shaft 25 being placed In the protective sleeve 27, the middle shaft 25 is sleeved with a torque sleeve 26, the torque sleeve 26 is fixedly connected with the central shaft 25, and the emission feedback circuit is disposed on the inner wall of the protective sleeve 27. The receiving and collecting circuit is disposed on the torsion sleeve 26. The driving device 1 includes a housing 11 and a driving shaft 12, the driving shaft 12 is located at a center position of the housing 11, and an end portion 121 of one end of the driving shaft 12 penetrates to the outside of the housing 11. The linkage 2 further includes a linkage disc 22, a flange bearing 23 and a chain disc 24, the linkage disc 22 being placed in the gearbox 21, the flange bearing 23 being placed at the center of the gearbox 21 and Circumferentially moving according to the central axis of the gear box 21, the flange bearing 23 is sleeved on the central shaft 25 and coincides with the torsion sleeve 26, and the end portion 121 is tangentially twisted with the linkage plate 22 Mounting, the linkage plate 22 is sleeved on the flange bearing 23 and fixed to each other, and the left and right pedals can be installed at both ends, thereby realizing the design of the mechanically driven flange bearing 23, and the chain plate 24 is placed in the gear box 21. The outer side is fixed to the end surface 232 of the flange bearing 23, and the flange bearing 23 is a one-way flange bearing.

The torque sleeve 26 is mainly used for rotating the middle shaft 25 with the torque sleeve 26 when the driving device 1 is not used, and the torque sleeve 26 can drive the end surface 232 of the flange bearing 23 to carry the movement. Specifically, the flange bearing 23 can only be carried out. When the middle shaft 25 rotates the torque sleeve 26, the torque sleeve 26 cannot drive the flange bearing 23 to rotate. Since the one-way flange bearing 23 has a one-way action, the middle shaft 25 only drives when the left and right cranks rotate. The end surface 232 of the flange bearing 23, so that the interlocking disk 22 mounted on the outer side of the one-way flange bearing 23 does not rotate, so that the end portion 121 is not rotated, and the load sense when driving the rotor of the motor during riding can be effectively solved. . The specific driving device 1 is a motor. The motor operates to rotate the driving shaft 12, and the end portion 121 of the driving shaft 12 is rotated, and the end portion 121 is tangentially twisted and mounted with the interlocking plate 22, that is, the outer surface of the end portion 121 is interlocked. The outer surface of the disk 22 has matching teeth, so that the end portion 121 can drive the linkage plate 22 to rotate, and then drives the chain plate 24 by driving the flange bearing 23, and drives the chain through the chain plate 24, and the chain drives the bicycle rear fork. The upper flywheel, in turn, powers the automatic car. Since the size of the end portion 121 is small and the number of small teeth is small, the size of the interlocking disk 22 is large and the number of teeth is large. Therefore, the driving device 1 gives the linkage device 2 a greater torque, and the efficiency of driving the bicycle is higher. Specifically, the ratio of the number of teeth of the end portion 121 to the number of teeth of the interlocking disk 22 is 3 to 32.3. The larger the ratio, the larger the torque, and the corresponding torque is larger. Preferably, the chain curve 241 is also included. A chain shackle 241 is fixed to the end surface 232 of the flange bearing 23, and the sprocket 24 is fixed to the sprocket shackle 241. The sprocket 24 is fixed to the end surface 232 of the flange bearing 23 by screws, and the sprocket 24 is also By implementing the fixed connection with the sprocket Φ 241, the gear box 21 is mainly used to protect the interlocking disc 22 and the flange bearing 23, so that it is not easily affected by the outside world, and the normal operation of the equipment is ensured.

Specifically, the torque sleeve 26 is provided with a receiving frame 264, a torque sensor 263, a power receiving coil 265 and a receiving circuit board (not shown), and the receiving frame 264 is fixedly connected to the torque sleeve 26 and the middle a shaft 25, the torque sensor 263 is fixed in a middle portion of the receiving bobbin 264, the power receiving coil 265 is fixed at a tail portion of the receiving bobbin 264, and the receiving circuit board is fixed on the receiving bobbin 264, The torque sensor 263 and the power receiving coil 265 are electrically connected to the receiving circuit board, and the torque sensor 263 is a stress sensor. The receiving and collecting circuit is disposed on the receiving circuit board, wherein L3 in the receiving and collecting circuit is a power receiving coil 265, and the strain signal collecting circuit is connected with the torque sensor 263 for collecting change data of the stress sensor. The power receiving coil 265 can receive the power transmitted from the power transmitting coil 272, thereby powering the torque sensor 263, thereby driving the torque sensor 263 to operate, thereby being able to sense the torque generated by the torque sleeve 26 when the center motor enters the mechanical motion. Torque, easy to detect changes in torque in the center motor. The receiving skeleton 264 is hollow, and a circuit board is placed in the middle, and the data of the torque sensor 263 is processed and the data can be transmitted through the power receiving coil 265 and can be recognized.

Preferably, the inner surface of the torsion sleeve 26 is provided with an internal spline 266, and the central shaft 25 is provided with an external spline 252 that matches the internal spline 266, and the internal spline 266 is The outer splines 252 are nested and fixed to each other, and the receiving bobbin 264 is provided with a three-proof sleeve 267. The torsion sleeve 26 is hollow in the middle and can be sleeved on the middle shaft 25. The inner spline 266 is shaped like a hollow gear, and the outer spline 252 is similar to a gear. When the two are nested together, they can be just tightened. The center shaft 25 is concentrically rotated with the torque sleeve 26.

Specifically, the protective sleeve 27 is substantially identical to the inner diameter of the bicycle five-way, and can be integrally placed into the bicycle five-way, thereby fixing the gear box 21, and the housing 11 of the driving device 1 is also fixed to the outer wall of the gear box 21, Only a window (not shown) accommodating the end portion 121 of the drive shaft 12 is connected to the interlocking disk 22, and the inner surface of the protective cover 27 is provided with an emission skeleton 271, and the emission skeleton 271 surrounds the protective sleeve 27. One end of the surface of the emission frame 271 is provided with a power transmitting coil 272 corresponding to the power receiving coil 265, and the transmitting frame 271 is further provided with a transmitting circuit board (not shown) The emission feedback circuit is disposed on the transmission circuit board, wherein L1 is the power transmission coil 272. The power transmitting coil 272 and the power receiving coil 265 are close to each other to ensure mutual movement, thereby functioning as a power transmission, and the external power is transmitted to the power receiving coil 265 in the torque sleeve 26 through the power transmitting coil 272, thereby receiving The circuit board provides power and can also receive the torque information fed back by the power receiving coil 265, and can be transmitted to the outside through the lead cable 274 for recording, and the lead cable 274 is electrically connected to the signal output circuit.

Specifically, the torque sleeve 26 is provided with a plurality of grooves 261, and the groove 261 is correspondingly mounted with a ratchet claw 262. The flange bearing 23 is internally provided with a toothed ratchet seat 231, and the ratchet claw 262 is The toothed ratchet seat 231 is matched. One end of the ratchet pawl 262 is movably connected to the torsion sleeve 26, and the other end is suspended. The middle of the ratchet pawl 262 is connected to the recess of the groove 261 by a spring. When the ratchet pawl 262 is in operation, when the torque sleeve 26 rotates in the forward direction, the protruding protrusion can catch the toothed ratchet seat 231 under the elastic support of the spring, thereby driving the flange bearing 23 to rotate, and when the torque sleeve 26 is reversed When rotating, the ratchet pawl 262 is received in the groove 261 under the pressure of the toothed shape of the toothed ratchet seat 231, so that the end surface 232 of the flange bearing 23 cannot be reversed to ensure that the flange bearing 23 can only perform one-way rotation. A second bearing 268 is disposed between the torque sleeve 26 and the middle shaft 25 to prevent the torque sleeve 26 from being overloaded when the overload occurs, thereby ensuring the reliability of the overall equipment operation. .

Specifically, the center shaft 25 is provided with a speed magnet 251. The inner surface of the protective sleeve 27 is provided with a speed sensor 273. The speed sensor 273 corresponds to the speed magnet 251, and the speed magnet 251 can be rotated when rotated. The speed sensor 273 provided in the protective cover 27 recognizes the number of revolutions, and can recognize the number of revolutions of the central shaft 25, so that the cadence can be recognized. Preferably, the speed sensor 273 uses a Hall sensor to accurately The number of revolutions of the speed magnet 251 is recognized to obtain accurate cadence data.

Preferably, a first bearing 242 is disposed between the end portion 121 of the flange bearing 23 and the center shaft 25, and a third bearing 233 is disposed between the flange bearing 23 and the gear box 21, A fourth bearing 275 is disposed between the tail portion of the protective cover 27 and the center shaft 25, and the fifth bearing 111 and the sixth bearing 112 are respectively disposed at the rear end and the front end of the driving shaft 12 and the casing 11. A seventh bearing 122 is disposed at the intersection of the drive shaft 12 and the gearbox 21. The bearing connection is used as a whole to make the middle shaft 25 rotate more smoothly. At the same time, the frictional force of the flange bearing 23 is reduced when the linkage plate 22 is rotated, so that the overall operation of the center motor is quieter and the internal operation is smoother.

The circuit combination of the above-described dynamic sensor in the center motor of its application works as follows.

A. The clock signal generation loop generates a clock signal. After the output power is amplified by the power amplification loop, the energy is sent out through L1 and C1.

B. L3 receives the electromagnetic wave sent by L1 and maximizes the received energy through the power resonant circuit.

C. The rectifier circuit converts the received alternating current into pulsed direct current into two paths:

(i) One way through the one-way loop-filter loop-stabilization loop to supply the "strain signal acquisition loop-strain signal amplification loop-voltage to frequency loop-signal modulation output loop";

(ii) The other way is to continuously switch through T1-R1, so that the load of the receiving and collecting circuit is increased, so as to lower the output voltage of the rectifier circuit.

D. The one-way circuit isolates the sharp change of the output voltage after the rectification loop caused by the opening of T1-R1, so that the power supply of the signal processing part is more stable.

E. The filter loop acts as a filter and energy storage. The voltage regulator provides a high stability and low ripple power supply for the “strain signal acquisition loop-strain signal amplification loop-voltage to frequency loop-signal modulation output” loop. .

F. The strain signal acquisition loop collects the torque sleeve 26 and causes the strain sensor to change slightly, and then transmits the strain signal to the strain signal amplification loop to be amplified by a fixed ratio.

G. The amplified strain signal is converted into a square wave output linearly proportional to the strain signal by a voltage-to-frequency loop.

H. After the conversion, the frequency signal controls the conduction of R1 through the action of the T1 switch, which serves to lower the output voltage after the rectifier circuit, thereby causing the load to be aggravated.

I. The load aggravation caused by the pull-down is caused by the rectification loop-power resonance loop-L3-L1-C1/power amplification loop to the power supply DC power supply VCC, thereby causing a change in the power supply of the DC power supply VCC. The change caused by the load increase directly reflects the change of the amplitude of the transmitted current in the part of the transmitting feedback circuit and the power supply and the L1 and C1. The output waveform at both ends of L1 and C1 generates the data envelope form.

J. The voltage across C1 is rectified and detected by the signal detection loop, and then the high-frequency part is filtered by the low-pass filter circuit to obtain a weak change completely synchronized with the modulated signal.

K. After the filtering process, the weak change that is completely synchronized with the modulated signal is sent to the signal shaping amplification loop to be restored to the modulated signal output.

L. The working sequence diagram generated in the above process is shown in Figure 9.

The invention adopts coaxial installation, coaxial output and single-stage helical gear parallel transmission mode; since the single-stage speed reduction structure realizes the coaxial output, the motor volume is effectively reduced, and the overall appearance of the bicycle is little affected, from the appearance of the whole vehicle. From the perspective, the similarity with the bicycle is very high.

The above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims

A circuit assembly of a dynamic sensor, comprising a transmitting feedback circuit and a receiving and collecting circuit, wherein the transmitting feedback circuit comprises an inductor L1, the receiving and collecting circuit comprises an inductor L3, and the inductor L1 corresponds to the inductor L3 And inductive links to each other.
The circuit combination according to claim 1, wherein the transmitting feedback circuit further comprises a clock signal generating circuit, a power amplifying circuit, a signal detecting circuit, a low-pass filtering circuit, a signal shaping amplifying circuit, a signal output circuit and a capacitor C1. The clock signal generating circuit, the power amplifying circuit, the inductor L1, the signal detecting circuit, the low-pass filter circuit, the signal shaping amplifying circuit and the signal output circuit are sequentially and electrically connected. The clock signal generating circuit, the power amplifying circuit, the signal detecting circuit, the low-pass filter circuit and the signal shaping amplifying circuit are powered by a DC power source VCC, and the inductor L1 is connected in series with the capacitor C1. The inductor L1 forms a resonant tank with the capacitor C1.
The circuit assembly according to claim 1, wherein the receiving and collecting circuit further comprises a power resonant circuit, a rectifying circuit, a unidirectional circuit, a filtering circuit, a voltage stabilizing circuit, a strain signal collecting circuit, a strain signal amplifying circuit, and a voltage. Transforming a frequency loop and a signal modulation output loop, the inductor L3, the power cointegration loop and the rectifier loop are sequentially and electrically connected, and the rectifier loop is electrically connected to the unidirectional loop and the signal modulation output loop Connected, the one-way loop is electrically connected to the voltage stabilizing loop via the filter loop, and the voltage stabilizing loop is electrically connected to the strain signal acquisition loop, the strain signal amplification loop, and the voltage transition frequency loop, respectively The strain signal acquisition loop, the strain signal amplification loop, and the voltage transition frequency loop are sequentially and sequentially electrically connected, and the voltage transition frequency loop is electrically connected to the signal modulation output loop.
The circuit assembly according to any one of claims 1 to 3, wherein the transmitting feedback circuit and the receiving and collecting circuit are in a relationship between a stator and a rotor, the transmitting feedback circuit is fixed, and the receiving and collecting are performed. The circuit is rotated 360° around the transmit feedback circuit.
A center motor using the circuit combination according to any one of claims 1 to 4, comprising a driving device (1) and a linkage device (2), the driving device (1) driving the linkage device (2), The utility model is characterized in that the linkage device (2) comprises a gear box (21), a middle shaft (25) and a protective sleeve (27), and the gear box (21) is fixedly connected with the protection box, the central shaft (25) placed in the protective sleeve (27), the middle shaft (25) is sleeved with a torque sleeve (26), and the torque sleeve (26) is fixedly connected with the central shaft (25). The transmitting feedback circuit is disposed on an inner wall of the protective sleeve (27), and the receiving and collecting circuit is disposed on the torsion sleeve (26).
The center motor according to claim 5, characterized in that the driving device (1) comprises a housing (11) and a driving shaft (12), and the driving shaft (12) is located in the housing (11) An inner center position, an end portion (121) of one end of the drive shaft (12) penetrates outside the casing (11), and the linkage (2) further includes a linkage plate (22) and a flange bearing (23) And a chain disc (24), the linkage disc (22) is placed in the gear box (21), the flange bearing (23) is placed at the center of the gear box (21) and can be gearboxed (21) the central axis is circularly moved, the flange bearing (23) is sleeved on the central shaft (25) and coincides with the torsion sleeve (26), the end portion (121) and the The interlocking disc (22) is tangentially twisted and mounted, the interlocking disc (22) is sleeved on the flange bearing (23) and fixed to each other, and the chain disc (24) is placed outside the gear box (21) One side is fixed to an end surface (232) of the flange bearing (23), and the flange bearing (23) is a one-way flange bearing.
The center motor according to claim 6, wherein the torsion sleeve (26) is provided with a receiving bobbin (264), a torque sensor (263), a power receiving coil (265) and a receiving circuit board, a receiving bobbin (264) fixedly connecting the torsion sleeve (26) and the central shaft (25), the torque sensor (263) being fixed in a middle portion of the receiving skeleton (264), the power receiving coil (265) Fixed at the tail of the receiving skeleton (264), the receiving circuit board is fixed on the receiving skeleton (264), the torque sensor (263), the power receiving coil (265) and the receiving circuit board Electrically connected, the torque sensor (263) is a stress sensor.
The center motor according to claim 7, wherein an inner surface of the torsion sleeve (26) is provided with an internal spline (266), and the central shaft (25) is provided with the internal spline (266) an identical external spline (252), the inner spline (266) and the outer spline (252) are nested and fixed to each other, and the receiving skeleton (264) is provided with a three-proof sleeve ( 267).
The center motor according to claim 6, wherein an inner surface of the protective sleeve (27) is provided with an emission skeleton (271), and the emission skeleton (271) surrounds the inner surface of the protective sleeve (27). One end of the emission skeleton (271) is provided with a power transmitting coil (272) corresponding to the power receiving coil (265), and the emission skeleton (271) is further provided with Transmit the board.
The center motor according to any one of claims 6-9, wherein the torsion sleeve (26) is provided with a plurality of grooves (261), and the grooves (261) are correspondingly mounted with ratchet claws. (262), the flange bearing (23) is internally provided with a toothed ratchet seat (231), and the ratchet pawl (262) is matched with the toothed ratchet seat (231), the ratchet pawl (262) One end is movably connected to the torsion sleeve (26), and the other end is suspended. The middle portion of the ratchet pawl (262) is connected to the recess of the groove (261) by a spring.
The center motor according to claim 10, wherein the center shaft (25) is provided with a speed magnet (251), and the inner surface of the protective sleeve (27) is provided with a speed sensor (273). The speed sensor (273) corresponds to the speed magnet (251).
The center motor according to claim 10, further comprising a sprocket crank (241) fixed to an end face (232) of said flange bearing (23), said chain A disk (24) is fixed to the sprocket wheel (241).
The center motor according to claim 12, wherein a first bearing (242) is disposed between an end portion (121) of the flange bearing (23) and the center shaft (25), A second bearing (268) is disposed between the torque sleeve (26) and the central shaft (25), and a third bearing (233) is disposed between the flange bearing (23) and the gear box (21). a fourth bearing (275) is disposed between the tail of the protective sleeve (27) and the central shaft (25), and the driving shaft (12) and the rear end and the front end of the housing (11) are respectively A fifth bearing (111) and a sixth bearing (112) are provided, and a seventh bearing (122) is disposed at the intersection of the drive shaft (12) and the gear box (21).