Dynamic Torque and Pedaling Frequency Speed Integrated Sensing Device for Freewheel Structure of Electric Bicycle

Abstract

The dynamic torque and pedal frequency speed integrated induction device of the freewheel structure of the electric bicycle of the present invention includes a freewheel, a freewheel induction main body, a fixed outer shell, and at least one sensor for sensing the torque of the freewheel induction main body. The freewheel induction main body includes a freewheel induction main body relative fixed part, a freewheel induction main body transition part, and a freewheel induction main body relative rotation part. The freewheel induction main body relative fixed part is connected to the fixed outer shell and rotates relative to it. The freewheel includes a chain gear part and a locking part. When the chain gear part and the locking part rotate relative to each other, they have a one-way clutch function. The locking part is connected and fixed to the freewheel induction main body relative rotation part. The integrated induction device further includes a pedal frequency speed induction device, which includes a pedal frequency speed sensor and a pedal frequency speed induction component. The pedal frequency speed sensor is fixed to the freewheel induction main body, and the pedal frequency speed induction component is fixed to the chain gear part. The present invention solves the problem that the freewheel torque sensor lacks the pedal frequency speed function, makes full use of the space, and has a compact structure.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicles, and particularly to a dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle. Background Art

[0002] With people constantly putting forward higher requirements for intelligent travel, torque sensors are increasingly favored by people. At present, the development of torque sensors is more and more inclined to the inside of the motor, so that the wiring and assembly of the whole vehicle are simpler and more beautiful. For a dynamic torque sensing device sensor for the freewheel structure of an electric bicycle with the patent number 201920625117.7, due to the lack of pedal frequency speed sensor parameters, there are potential safety hazards and it affects the better riding comfort. Generally, a pedal frequency speed module is added in the hub motor, which puts more complex requirements on the motor structure design. Especially for some small-size hub motors, there is simply no space to add a pedal frequency speed module. Usually, this solution has to be abandoned for some small-size motors. Summary of the Invention

[0003] The object of the present invention is to provide a dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle, which does not bear the weight of the human body and the whole vehicle and can truly reflect the magnitude of the pedal force.

[0004] The present invention realizes the above object through the following technical solutions: A dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle, including a flywheel, a freewheel induction main body, a fixed housing, and at least one sensor for sensing the torque of the freewheel induction main body. The freewheel induction main body includes a freewheel induction main body relative fixed part, a freewheel induction main body transition part, and a freewheel induction main body relative rotation part. The freewheel induction main body relative fixed part is connected to the fixed housing and rotates relatively. The flywheel includes a chain tooth part and a locking part. When the chain tooth part rotates relative to the locking part, it has a one-way clutch function. The locking part is fixedly connected to the freewheel induction main body relative rotation part. The integrated sensing device further includes a pedal frequency speed sensing device, and the pedal frequency speed sensing device includes a pedal frequency speed sensor and a pedal frequency speed sensed component. The pedal frequency speed sensor is fixed to the freewheel induction main body, and the pedal frequency speed sensed component is fixed to the chain tooth part.

[0005] Further, the integrated sensing device further includes a vehicle speed sensing device.

[0006] Further, the vehicle speed sensing device includes a vehicle speed sensor and a vehicle speed sensing magnet.

[0007] Further, the dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle further includes a primary control circuit of the inductor and a secondary control circuit of the inductor.

[0008] Further, the primary control circuit of the inductor is electrically connected to the vehicle speed sensor, and a vehicle speed induction magnet is provided at the end of the freewheel induction body relative to the fixed part.

[0009] Further, the pedal frequency and speed induction component includes ferromagnetic material parts.

[0010] Further, the ferromagnetic material part is a pedal frequency and speed induction magnet, and the pedal frequency and speed induction component further includes a pedal frequency and speed induction magnet bracket.

[0011] Further, the secondary control circuit of the inductor is electrically connected to the pedal frequency and speed sensor.

[0012] Further, the pedal frequency and speed induction magnet bracket includes a pedal frequency and speed induction magnet groove for installing the pedal frequency and speed induction magnet and a pedal frequency and speed component fixed magnet groove for installing the pedal frequency and speed component fixed magnet. The pedal frequency and speed induction magnet groove is located on the side away from the flywheel, and the pedal frequency and speed component fixed magnet groove is located on the side close to the flywheel.

[0013] Further, a pedal frequency and speed sensor fixing bracket is sleeved on the transition part of the freewheel induction body. The pedal frequency and speed sensor fixing bracket includes a pedal frequency and speed sensor fixing groove for installing the pedal frequency and speed sensor. The pedal frequency and speed sensor is located in the pedal frequency and speed sensor fixing groove, and then a pedal frequency and speed sensor bracket cover is used to cover it to form a pedal frequency and speed induction surface.

[0014] Further, the pedal frequency and speed sensor fixing bracket further includes a pedal frequency and speed sensor fixing bracket positioning part for positioning with the fixed part of the freewheel induction body and a pedal frequency bracket screw locking part for installing screws.

[0015] Further, the sensor is fixed to the inner wall side of the freewheel induction body relative to the transition part.

[0016] Further, the flywheel includes a multi-speed freewheel and a single-speed flywheel.

[0017] The sensor is electrically connected to the secondary control circuit of the inductor.

[0018] Compared with the prior art, the beneficial effects of the dynamic torque and pedal frequency and speed integrated induction device of the freewheel structure of the electric bicycle of the present invention are as follows: It better solves the problem that the freewheel torque sensor lacks the pedal frequency and speed function, improves the riding comfort and safety, makes full use of space, has a compact structure, which makes the small-size hub motor with high cost performance more practical, has lower cost, and the highly integrated whole vehicle is more beautiful and concise. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of Embodiment 1.

[0020] Figure 2 is Figure 1 the schematic diagram of the primary explosion.

[0021] Figure 3 is Figure 1 the schematic diagram of the secondary explosion.

[0022] Figure 4 is Figure 1 the schematic diagram of the sectional structure.

[0023] Figure 5 is the schematic diagram of the structure of the cadence speed sensor fixing bracket.

[0024] Figure 6 is Figure 5 the view from another angle.

[0025] Figure 7 is Figure 3 the schematic diagram of the partial structure.

[0026] Figure 8 is the schematic diagram of the structure of the cadence speed sensing component.

[0027] Figure 9 is Figure 8 the view from another angle.

[0028] Figure 10 is the schematic diagram of the freewheel induction body.

[0029] Figure 11 is the schematic diagram of the structure of Embodiment 2.

[0030] Figure 12 is Figure 11 the explosion schematic diagram.

[0031] The reference numerals in the figure are as follows:

[0032] 1 - freewheel induction body; 101 - relatively fixed part of the freewheel induction body; 102 - relatively rotating part of the freewheel induction body; 103 - transition part of the freewheel induction body; 104 - inner cavity;

[0033] 2 - fixed outer shell; 201 - signal line hole; 202 - positioning part of the fixed outer shell;

[0034] 3 - primary control circuit of the inductor;

[0035] 4 - infrared receiving element;

[0036] 5 - electromagnetic shielding body;

[0037] 6 - primary induction coil;

[0038] 7 - secondary induction coil;

[0039] 8 - Signal line;

[0040] 9 - Inductor secondary control circuit;

[0041] 10 - Infrared emission element;

[0042] 11 - Bearing;

[0043] 12 - Sensor;

[0044] 13 - Cadence speed sensor;

[0045] 14 - Cadence speed sensing component; 141 - Cadence speed sensing magnet; 142 - Cadence speed sensing magnet bracket; 1421 - Cadence speed sensing magnet groove; 1422 - Cadence speed component fixing magnet groove;

[0046] 15 - Vehicle speed sensor;

[0047] 16 - Vehicle speed sensing magnet;

[0048] 17 - Cadence speed component fixing magnet;

[0049] 18 - Cadence speed sensor fixing bracket; 181 - Cadence speed sensor fixing groove; 182 - Cadence speed sensor fixing bracket positioning part; 183 Cadence speed bracket screw locking part;

[0050] 19 - Cadence speed sensor bracket cover;

[0051] 20 - Flywheel; 2001 - Chain tooth part; 2002 - Locking part;

[0052] 21 - PCB protective sleeve;

[0053] 22 - Cadence speed sensing surface;

[0054] 23 - Screw. Detailed implementation manners

[0055] Embodiment 1

[0056] Please refer to Figures 1 to 10, the flywheel 20 is a multi-speed freewheel, a dynamic torque and pedal frequency speed integrated induction device for the freewheel structure of an electric bicycle, including a flywheel 20, a freewheel induction main body 1, a fixed housing 2, and at least one sensor 12 for sensing the torque of the freewheel induction main body. The integrated induction device further includes a pedal frequency speed induction device, and the pedal frequency speed induction device includes a pedal frequency speed sensor 13 and a pedal frequency speed component to be sensed 14. The integrated induction device further includes a vehicle speed induction device. The fixed housing 2 is connected to and rotates relative to the relative fixed part 101 of the freewheel induction main body 1 of the freewheel induction main body, or the fixed housing 2 is indirectly connected to and rotates relative to the relative fixed part 101 of the freewheel induction main body through the inner ring of the bearing 11. The flywheel 20 includes a chain tooth part 2001, a locking part 2002, and a one-way clutch structure (not shown in the figure). The one-way clutch structure is, for example, a ratchet structure. The locking part is connected and fixed to the relative rotating part 102 of the freewheel induction main body. When the chain tooth part 2001 rotates relative to the locking part 2002, it has the function of a one-way clutch. The pedal frequency speed sensor 13 is fixed to the freewheel induction main body 1, and the pedal frequency speed component to be sensed 14 is fixed to the chain tooth part 2001.

[0057] The pedal frequency speed component to be sensed 14 includes a ferromagnetic material component. The ferromagnetic material component in this embodiment is a pedal frequency speed induction magnet 141.

[0058] In this embodiment, the pedal frequency speed component to be sensed 14 includes a pedal frequency speed induction magnet 141 and a pedal frequency speed induction magnet bracket 142. The pedal frequency speed induction magnet bracket 142 includes a pedal frequency speed induction magnet groove 1421 for installing the pedal frequency speed induction magnet 141 and a pedal frequency speed component fixing magnet groove 1422 for installing the pedal frequency speed component fixing magnet 17. The pedal frequency speed induction magnet groove 1421 is located on the side away from the flywheel 20, and the pedal frequency speed component fixing magnet groove 142 is located on the side close to the flywheel 20. The pedal frequency speed component to be sensed 14 is connected and fixed to the chain tooth part 2001 of the flywheel through the pedal frequency speed component fixing magnet 17. The pedal frequency speed sensor 13 and the pedal frequency speed induction magnet 141 form a pedal frequency speed induction device. When the pedal frequency speed induction magnet 141 rotates, it must be within the sensing range of the pedal frequency speed sensor 13.

[0059] The rotary flywheel induction main body 1 includes a relatively fixed part 101 of the rotary flywheel induction main body, a transition part 103 of the rotary flywheel induction main body, and a relatively rotating part 102 of the rotary flywheel induction main body. The relatively fixed part 101 of the rotary flywheel induction main body, the transition part 103 of the rotary flywheel induction main body, and the relatively rotating part 102 of the rotary flywheel induction main body are all annular structures. The relatively fixed part 101 of the rotary flywheel induction main body, the transition part 103 of the rotary flywheel induction main body, and the relatively rotating part 102 of the rotary flywheel induction main body are arranged in sequence along the axial direction of the rotary flywheel induction main body 1. The transition part 103 of the rotary flywheel induction main body is used to connect the relatively fixed part 101 of the rotary flywheel induction main body and the relatively rotating part 102 of the rotary flywheel induction main body. Bearings 11 are provided in the inner cavities 104 of the relatively fixed part 101 of the rotary flywheel induction main body and the relatively rotating part 102 of the rotary flywheel induction main body. External threads are provided on the outer surface of the relatively rotating part 102 of the rotary flywheel induction main body, and are threadedly connected and fixed to the internal thread of the locking part 2002 of the flywheel 20. The sensor 12 is fixed to the inner wall side of the relatively transitional part 103 of the rotary flywheel induction main body. A PCB protective sleeve 21 is provided in the transition part 103 of the rotary flywheel induction main body. The two end faces of the PCB protective sleeve 21 are in contact with the rotary flywheel induction main body 1 to play a protective role. In a practical embodiment, the relatively fixed part 101 of the rotary flywheel induction main body is usually fixedly connected to the housing of the rear hub motor (including the end cover) of the electric assist bicycle or the housing of the rear wheel hub.

[0060] In this embodiment, the sensor 12 is a deformation induction sensor. The deformation induction sensor is a resistive strain gauge. The deformation induction sensor is arranged in the transition part 103 of the rotary flywheel induction main body. In other embodiments, the sensor 12 can be a combination of a torque induction Hall element and a torque induction magnet. The torque induction Hall element and the torque induction magnet are respectively arranged on the relatively fixed part 101 of the rotary flywheel induction main body and the relatively rotating part 102 of the rotary flywheel induction main body, or the torque induction Hall element and the torque induction magnet are respectively arranged on the relatively rotating part of the rotary flywheel induction main body and the relatively fixed part of the rotary flywheel induction main body, as long as there is a slight relative movement between the torque induction Hall element and the torque induction magnet.

[0061] The fixed housing 2 is an annular shell. The inner surface of the hole of the annular shell that cooperates with the shaft rod is provided with a positioning part 202 of the fixed housing. The positioning part of the fixed housing is strip-shaped. The positioning part 202 of the fixed housing is used to limit the rotation of the fixed housing 2. A signal line hole 201 is provided on the outer surface of the annular shell. The signal line 8 is electrically connected to the primary control circuit of the inductor through the signal line hole 201.

[0062] The dynamic torque and pedal frequency speed integrated induction device of the freewheel structure of the electric bicycle further includes an inductor primary control circuit 3 and an inductor secondary control circuit 9. The inductor primary control circuit 3 is fixed inside the fixed housing 2, and the inductor primary control circuit 3 is provided with an infrared receiving element 4. The freewheel induction main body 1 is connected and fixed with an inductor secondary control circuit 9, and the inductor secondary control circuit 9 is provided with an infrared transmitting element 10. The infrared receiving element 4 and the infrared transmitting element 10 are arranged in opposite positions, and it is ensured that the infrared signal receiving parts of the two can sense each other. The signal is transmitted between the inductor primary control circuit 3 and the inductor secondary control circuit 9 through the infrared receiving element 4 and the infrared transmitting element 10. The emitted light can be visible light or invisible light. In this embodiment, the emitted light is invisible light, that is, infrared rays are used for data transmission, and the relative cost is low. The inductor primary control circuit 3 is electrically connected to the signal line 8.

[0063] The inductor secondary control circuit 9 is electrically connected to a pedal frequency speed sensor 13, and the inductor primary control circuit 3 is electrically connected to a vehicle speed sensor 15. The end of the freewheel induction main body relative to the fixed part 101 is provided with a vehicle speed induction magnet 16. The vehicle speed sensor 15 and the vehicle speed induction magnet 16 form a vehicle speed induction device. When the vehicle speed induction magnet 16 rotates, it must be within the induction range of the vehicle speed sensor 15.

[0064] A pedal frequency speed sensor fixing bracket 18 is sleeved on the transition part 103 of the freewheel induction main body. The pedal frequency speed sensor fixing bracket 18 includes a pedal frequency speed sensor fixing groove 181 for installing the pedal frequency speed sensor 13, a pedal frequency speed sensor fixing bracket positioning part 182 for positioning with the fixed part 101 of the freewheel induction main body, and a pedal frequency speed bracket screw locking part 183 for installing the screw 23. The pedal frequency speed sensor 13 is located in the pedal frequency speed sensor fixing groove 181, and then covered by the pedal frequency speed sensor bracket cover 19 to form a pedal frequency speed induction surface 22.

[0065] The dynamic torque and pedal frequency speed integrated induction device of the freewheel structure of the electric bicycle further includes a primary induction coil 6 and a secondary induction coil 7. The secondary induction coil 7 and the primary induction coil 6 are arranged adjacent to each other. The primary induction coil 6 is electrically connected to the primary control circuit 3 of the inductor, and the secondary induction coil 7 is electrically connected to the secondary control circuit 9 of the inductor. Wireless signal transmission is carried out between the primary induction coil 6 and the secondary induction coil 7. The power supply methods of the secondary control circuit 9 of the inductor include: the secondary control circuit 9 of the inductor provides electric energy through its own power generation device, battery power supply or wireless transmission method; or the secondary control circuit 9 of the inductor provides electric energy through the wireless power transmission method between the secondary induction coil 7 and the primary induction coil 6. In this embodiment, electric energy is wirelessly transmitted to the secondary control circuit 9 of the inductor through the primary control circuit 3 of the inductor, the secondary control circuit 9 of the inductor, the primary induction coil 6 and the secondary induction coil 7 by means of resonant coupling.

[0066] The dynamic torque and pedal frequency speed integrated induction device of the freewheel structure of the electric bicycle further includes two electromagnetic shielding bodies 5. The two electromagnetic shielding bodies 5 are respectively located outside the secondary induction coil 7 and the primary induction coil 6, used to isolate the electromagnetic interference between the primary induction coil 6 and the secondary induction coil 7 and the outside world and improve the energy transfer of the coils.

[0067] The sensor 12 is electrically connected to the secondary control circuit 9 of the inductor. The secondary control circuit 9 of the inductor receives the torque signal of the freewheel induction main body transition part 103 of the freewheel induction main body 1 sensed by the sensor 12, and then conducts data transmission through the infrared receiving element 4 and the infrared transmitting element 10, or conducts data transmission through the primary induction coil 6 and the secondary induction coil 7; after receiving the signal, the primary control circuit 3 of the inductor conducts data processing, and then outputs the torque signal through the signal line 8.

[0068] The working principle of the present invention is as follows: When riding a bicycle, the user drives the pedal disc to rotate by stepping on the pedals. The pedal disc drives the sensing body to rotate relative to the rotating part 102 through a transmission structure such as a chain, a belt, or a freewheel. The torque is transmitted from the sensing body relative to the rotating part 102 to the freewheel sensing body transition part 103 and the freewheel sensing body relative to the fixed part 101. The sensor senses the displacement magnitude between the freewheel sensing body relative to the rotating part and the freewheel sensing body relative to the fixed part or the deformation magnitude of the freewheel sensing body transition part 103, thereby realizing the sensing of the torque signal. The vehicle speed sensor is fixed to the primary control circuit of the sensor and is fixedly connected to the axle rod through the fixed housing 2. The vehicle speed sensing magnet is fixed to the freewheel sensing body relative to the fixed part 101. When the vehicle is riding, the freewheel sensing body 1 rotates synchronously with the vehicle wheel, so that the vehicle speed can be judged. The cadence speed sensor is fixed to the freewheel sensing body 1. The cadence speed sensing component 14 is fixed to the chain tooth part of the flywheel. The chain tooth part of the flywheel rotates forward and backward synchronously with the pedals. Therefore, by sensing the rotation condition of the chain tooth part of the flywheel, the rotation speed and direction of the pedals can be judged, and then through the control circuit, it is converted into the torque signal, cadence speed signal, and vehicle speed signal of the pedals that the user needs to obtain. The secondary control circuit of the sensor transmits the received torque signal and cadence speed signal to the primary control circuit of the sensor by wireless or infrared means. The primary control circuit of the sensor processes the received torque signal, cadence speed signal, and vehicle speed signal and then transmits them out.

[0069] Embodiment 2

[0070] Please refer to Figures 11 to 12 , the freewheel 20 is changed from a multi-speed freewheel to a single-speed freewheel. The freewheel sensing body relative to the rotating part 102 is adjusted in corresponding dimensions to match the single-speed freewheel. The structure of the cadence speed sensing component 14 is changed to a screw structure and is fixedly connected to the chain tooth part of the flywheel. The single-speed freewheel includes a chain-driven single-speed freewheel and a belt-driven single-speed freewheel. The chain-driven single-speed freewheel is a flywheel in a chain drive mode, and the belt-driven single-speed freewheel is a flywheel in a belt drive mode. The cadence speed sensing component 14 for the chain-driven single-speed freewheel or the belt-driven single-speed freewheel includes a cadence speed sensing magnet 141 and a cadence speed sensing magnet bracket 142. The cadence speed sensing component 14 is usually fixed to the chain tooth part of the chain-driven single-speed freewheel or the belt-driven single-speed freewheel in a threaded structure manner.

[0071] The dynamic torque and cadence speed integrated sensing device of the freewheel structure of the electric bicycle of the present invention better solves the problem that the freewheel torque sensor lacks the cadence speed function, improves the riding comfort and safety, makes full use of space, and has a compact structure. This makes the small-size hub motor, which already has high cost performance, more practical, with lower cost, and the highly integrated vehicle is more beautiful and concise.

[0072] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. Dynamic torque and pedaling frequency speed integrated sensing device for the freewheel structure of an electric bicycle, characterized in that: It includes a flywheel, a freewheel induction main body, a fixed housing, and at least one sensor for sensing the torque of the freewheel induction main body. The freewheel induction main body includes a freewheel induction main body relative fixed part, a freewheel induction main body transition part, and a freewheel induction main body relative rotation part. The freewheel induction main body relative fixed part is connected to the fixed housing and rotates relatively. The flywheel includes a chain gear part and a locking part. When the chain gear part and the locking part rotate relatively, they have a one-way clutch function. The locking part is connected and fixed to the freewheel induction main body relative rotation part; The integrated induction device further includes a cadence and speed induction device. The cadence and speed induction device includes a cadence and speed sensor and a cadence and speed sensed component. The cadence and speed sensor is fixed to the freewheel induction main body. The cadence and speed sensed component is connected and fixed to the chain gear part of the flywheel through a cadence and speed induction magnet bracket; The integrated induction device further includes a vehicle speed induction device; The chain gear part of the flywheel rotates forward and backward synchronously with the pedal, so as to judge the rotation speed and direction of the pedal by sensing the rotation condition of the chain gear part of the flywheel.

2. The dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle according to claim 1, characterized in that: The vehicle speed induction device includes a vehicle speed sensor and a vehicle speed induction magnet.

3. The dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle according to claim 2, wherein: The dynamic torque and cadence and speed integrated induction device of the electric bicycle freewheel structure further includes an inductor primary control circuit and an inductor secondary control circuit.

4. The dynamic torque and pedaling frequency speed integrated sensing device for the freewheel structure of an electric bicycle according to claim 1, characterized in that: The cadence and speed sensed component includes a cadence and speed induction magnet and a cadence and speed induction magnet bracket; The cadence and speed induction magnet bracket includes a cadence and speed induction magnet groove for installing the cadence and speed induction magnet and a cadence and speed component fixed magnet groove for installing the cadence and speed component fixed magnet; The cadence and speed induction magnet groove is located on the side away from the flywheel, and the cadence and speed component fixed magnet groove is located on the side close to the flywheel.

5. The dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle according to claim 3, characterized in that: The inductor primary control circuit is electrically connected to the vehicle speed sensor, and a vehicle speed induction magnet is provided at the end of the freewheel induction main body relative fixed part.

6. The dynamic torque and pedal frequency speed integrated sensing device of the freewheel structure of the electric bicycle according to claim 3, characterized in that: The inductor secondary control circuit is electrically connected to the cadence and speed sensor.

7. The dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle according to claim 1, characterized in that: The freewheel induction main body transition part is sleeved with a cadence and speed sensor fixing bracket. The cadence and speed sensor fixing bracket includes a cadence and speed sensor fixing groove for installing the cadence and speed sensor. The cadence and speed sensor is located in the cadence and speed sensor fixing groove, and then a cadence and speed sensor bracket cover is used to cover it to form a cadence and speed induction surface.

8. The dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle according to claim 7, characterized in that: The cadence and speed sensor fixing bracket further includes a cadence and speed sensor fixing bracket positioning part for positioning with the freewheel induction main body fixed part and a cadence and speed bracket screw locking part for installing screws.

9. The dynamic torque and pedaling frequency speed integrated sensing device for the freewheel structure of an electric bicycle according to claim 1, characterized in that: The sensor is fixed to the inner wall side of the freewheel induction main body relative transition part.

10. The dynamic torque and pedal frequency speed integrated sensing device for the freewheel structure of an electric bicycle according to claim 1, characterized in that: The flywheel includes a multi-speed freewheel and a single-speed freewheel.

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