Pedal torque self-recognition mechanism of electric bicycle

Abstract

According to the pedaling torque self-recognition mechanism of the electric bicycle, the design of an elastic rotating structure and the double coding discs is adopted, the real-time pedaling force of a rider is accurately captured, the first coding disc and the light sensing structure are arranged oppositely, the second coding disc and the first coding disc are coaxially nested and synchronously rotate through the crank, and when pedaling force is applied, the second coding disc and the second coding disc are coaxially nested and synchronously rotate through the crank. The two coding discs rotate asynchronously, the light sensing structure generates a torque signal through time difference, the design utilizes rotation difference between the coding discs, the sensitivity of torque detection is improved, the defect that a traditional sensor cannot capture tiny force change due to structural rigidity or response delay is overcome, the system adaptability is enhanced, and the system reliability is improved. And high-precision response and riding experience of electric assistance are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bicycles, in particular to a pedal torque self-identification mechanism for electric bicycles. BACKGROUND

[0002] Existing electric bicycles generally use torque self-identification mechanisms to detect the pedaling intensity of the rider, so as to adjust the output of electric assistance and achieve a better riding experience. Such torque self-identification mechanisms usually include sensors, torque sensors or Hall sensors for sensing the pedaling action of the rider and converting it into an electrical signal to control the output of the electric motor. This structure has been widely used in the market and has achieved the purpose of automatic assistance to a certain extent. In order to solve the problem of accurate detection of pedaling torque, existing technologies have proposed various solutions. Some solutions try to enhance the detection accuracy by increasing the number of sensors, improving the sensitivity of the sensors or optimizing the signal processing technology. These technical means try to improve the accuracy of the pedaling intensity signal in order to adjust the assistance output of the electric motor more timely. However, these improvement measures mainly depend on the design and performance of the sensor, which is limited by the sensitivity of the sensor, the rigidity of the mechanical structure and the signal processing capability of the sensor. The existing torque self-identification structure still has the problem of insufficient detection accuracy. The main defect of the existing technology is that the sensor relies on a specific mechanical structure to detect torque changes, such as being directly installed on the crank or bearing, which makes it difficult to accurately respond when dealing with rapid and small changes in pedaling intensity. Since the sensor is directly coupled to the torque transmission component, when the torque changes instantaneously, the rigidity of the mechanical structure and the response time of the sensor limit its ability to capture subtle differences in pedaling torque. In addition, traditional torque detection mechanisms are designed with a linear structure, which cannot provide continuous high-precision detection output when the torque changes are large, affecting the real-time and stability of electric assistance during riding.

[0003] Therefore, it is necessary to provide a pedal torque self-identification mechanism that can accurately capture the real-time pedaling intensity of the rider to solve the problem that traditional Hall sensors or torque sensors cannot accurately capture the real-time pedaling intensity of the rider, resulting in a mismatch between the assistance power and the actual demand, which may manifest as excessive or insufficient power output, affecting the riding efficiency of the electric bicycle. CONTENT OF THE INVENTION

[0004] Therefore, it is necessary to provide a pedal torque self-identification mechanism that can accurately capture the real-time pedaling intensity of the rider to solve the problem that traditional Hall sensors or torque sensors cannot accurately capture the real-time pedaling intensity of the rider, resulting in a mismatch between the assistance power and the actual demand, which may manifest as excessive or insufficient power output, affecting the riding efficiency of the electric bicycle.

[0005] The embodiment of the present application provides a pedal torque self-identification mechanism for electric bicycles, which comprises a crank arranged in an axial direction, a light sensing structure and an elastic rotating structure connected between the crank and the light sensing structure, wherein the elastic rotating structure comprises:

[0006] A first encoding disc is arranged opposite to the light sensing structure in the axial direction;

[0007] A second encoding disc is coaxial with the first encoding disc and is nested in the same plane as the first encoding disc. A crank penetrates the elastic rotating structure and is fixedly connected with the second encoding disc. The crank drives the second encoding disc to rotate synchronously with the first encoding disc.

[0008] When the pedaling force is applied, the first encoding disc and the second encoding disc rotate asynchronously. In the axial direction, the time difference between the first encoding disc and the second encoding disc is a first time length. The light sensing structure recognizes the first time length to form a torque signal.

[0009] In at least one embodiment of the present application, the crank is in clearance fit with the elastic rotating structure. The elastic rotating structure further comprises:

[0010] A claw cover is arranged on the claw cover. The claw cover is connected between the crank and the first encoding disc.

[0011] A reset elastic member is arranged on the contact surface between the claw cover and the crank. The reset elastic member is arranged opposite to the contact surface between the claw cover and the first encoding disc. One end of the reset elastic member is abutted against the claw cover, and the other end is abutted against the crank.

[0012] When the pedaling force is applied, the first encoding disc and the second encoding disc rotate asynchronously. At this time, in the axial direction, the crank presses the reset elastic member. The reset elastic member drives the crank to reset. The first encoding disc and the second encoding disc rotate synchronously.

[0013] In at least one embodiment of the present application, the light sensing structure has a minimum sensing angle. In the observation along the central axis of the crank width, the minimum sensing angle is 0.5°-1.5°. When the pedaling force is applied, the first encoding disc and the second encoding disc have a limit angular displacement difference. The limit angular displacement difference is 1°.

[0014] In at least one embodiment of the present application, the claw cover is surrounded by a first reset slot group opposite to the reset elastic member. The crank is surrounded by a second reset slot group opposite to the reset elastic member.

[0015] In the observation perpendicular to the rotation direction of the first encoding disc, a plurality of reset elastic members are arranged on the contact surface between the claw cover and the crank. One end of the reset elastic member is abutted against the first reset slot group, and the other end is abutted against the second reset slot group.

[0016] In at least one embodiment of the present application, in the first encoding disc rotation direction, one end of the crank penetrates the elastic rotation structure and the light sensing structure, the crank is in transmission connection with the elastic rotation structure, the crank is in rotation connection with the light sensing structure, and the light sensing structure is in rotation connection with the elastic rotation structure.

[0017] In at least one embodiment of the present application, the light sensing structure comprises a controller and a photosensitive sensor arranged in the controller.

[0018] In at least one embodiment of the present application, the controller is provided with a rotation through hole, the crank penetrates the rotation through hole and is in rotation connection with the controller, the controller is in connection with a motor, and the controller is in electrical connection with the motor and the photosensitive sensor.

[0019] The photosensitive sensor is arranged opposite to the first encoding disc and the second encoding disc respectively to capture the time difference of the light beam passing through the first encoding disc and the second encoding disc and generate an electrical signal, and the photosensitive sensor is in electrical connection with the controller.

[0020] In at least one embodiment of the present application, the claw cover is provided with a reset hole group around the contact surface of the crank, one end of the crank penetrates the reset hole group and is in screw connection with the second encoding disc, and the crank is in clearance fit with the reset hole group.

[0021] In at least one embodiment of the present application, the electric bicycle pedaling torque self-identification mechanism further comprises a gear disc, and the gear disc is in fixed connection with the elastic rotation structure in the axial direction.

[0022] In at least one embodiment of the present application, the claw cover is provided with a fixed hole in the axial direction, and the gear disc is in bolt connection with the fixed hole.

[0023] In at least one embodiment of the present application, the light sensing structure further comprises a waterproof ring, the waterproof ring is connected between the controller and the claw cover in the axial direction, and the waterproof ring is in interference fit with the controller and the claw cover.

[0024] The electric bicycle pedal torque self-identification mechanism provided above realizes accurate capture of the real-time pedaling force of the rider by adopting an elastic rotation structure and a double-encoding disc design. Specifically, the first encoding disc is arranged opposite to the light sensing structure, and the second encoding disc is coaxially nested with the first encoding disc and synchronously rotates with the pedaling action of the rider. When the rider applies a pedaling force, the two encoding discs produce non-synchronous rotation, and the light sensing structure generates a torque signal by identifying the time difference between them. This design cleverly utilizes the rotation difference between the encoding discs, making the torque detection more sensitive and effectively avoiding the defects of traditional sensors that cannot capture small force changes due to structural rigidity or response delay. The elastic rotation structure further enhances the adaptability of the system, allowing it to maintain high-precision output when facing different force changes, ensuring real-time response of electric assistance and improving the stability and comfort of the riding experience. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is an axial exploded view of an electric bicycle pedal torque self-identification mechanism.

[0026] Figure 2 It is an axonometric view of an electric bicycle pedal torque self-identification mechanism.

[0027] Figure 3 It is a partial structure axonometric view of an electric bicycle pedal torque self-identification mechanism.

[0028] Figure 4 It is a front view of the crank.

[0029] Figure 5 It is a front view of the controller.

[0030] Figure 6 It is a rear view of the controller.

[0031] Figure 7 It is a minimum sensing angle diagram of the elastic rotation structure.

[0032] Explanation of main element symbols

[0033] 1. Crank; 2. Light sensing structure; 3. Elastic rotation structure; 4. First encoding disc; 5. Second encoding disc; 6. Claw cover; 7. Reset elastic member; 8. First reset slot group; 9. Second reset slot group; 10. Controller; 11. Photosensitive sensor; 12. Rotation through-hole; 13. Motor; 14. Toothed disc; 15. Fixed hole; 16. Waterproof ring; 100. An electric bicycle pedal torque self-identification mechanism. DETAILED DESCRIPTION

[0034] Clearly, only some of the embodiments of the application are described and the full scope of embodiments will be pointed out in the claims.

[0035] It is to be understood that when a component is referred to as being "connected to" another component, it can be directly connected to the other component or intervening components can be present. When a component is referred to as being "positioned on" another component, it can be directly positioned on the other component or intervening components can be present. The terms "top", "bottom", "upper", "lower", "right", "left", "front", "rear", and the like as used herein are used for description only and are not intended to be limiting.

[0036] The embodiments of the application provide a pedal torque self-identification mechanism of an electric bicycle, comprising a crank arranged in an axial direction, a light sensing structure, and an elastic rotating structure connected between the crank and the light sensing structure, the elastic rotating structure comprising:

[0037] a first encoding disc, which is arranged opposite to the light sensing structure in the axial direction;

[0038] a second encoding disc, which rotates coaxially with the first encoding disc and is nested in the same plane as the first encoding disc, the crank penetrating through the elastic rotating structure and being fixedly connected with the second encoding disc, the crank driving the second encoding disc to rotate synchronously with the first encoding disc;

[0039] wherein, when a pedal force is applied, the first encoding disc and the second encoding disc rotate asynchronously, and the light sensing structure recognizes a time difference between the first encoding disc and the second encoding disc as a first time length in the axial direction, and the light sensing structure generates a torque signal based on the first time length.

[0040] The pedal torque self-identification mechanism of the electric bicycle provided above realizes accurate capture of real-time pedal force of a rider by adopting an elastic rotating structure and a double-encoding disc design. Specifically, the first encoding disc is arranged opposite to the light sensing structure, the second encoding disc is coaxially nested with the first encoding disc, and the second encoding disc rotates synchronously with the pedal action of the rider through the crank. When the rider applies a pedal force, the two encoding discs rotate asynchronously, and the light sensing structure generates a torque signal by recognizing the time difference between them. This design ingeniously utilizes the rotation difference between the encoding discs, making the torque detection more sensitive and effectively avoiding the defects of traditional sensors that cannot capture small force changes due to structural rigidity or response delay. The elastic rotating structure further enhances the adaptability of the system, enabling it to maintain high-precision output when facing different force changes, ensuring real-time response of electric assistance, and improving the stability and comfort of the riding experience.

[0041] The embodiments of the application will be described in detail below with reference to the accompanying drawings. Figures 1-7Some embodiments of the present application are described in detail. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] The embodiment of the present application provides a self-identifying mechanism for pedaling torque of an electric bicycle 100, which comprises a crank 1 arranged in an axial direction, a light sensing structure 2 and an elastic rotating structure 3 connected between the crank 1 and the light sensing structure 2, wherein the elastic rotating structure 3 comprises a first encoding disc 4 and a second encoding disc 5. The first encoding disc 4 is arranged opposite to the light sensing structure 2 in the axial direction. The second encoding disc 5 is coaxial with the first encoding disc 4 and is nested in the same plane with the first encoding disc 4. The crank 1 penetrates through the elastic rotating structure 3 and is fixedly connected with the second encoding disc 5. The crank 1 drives the second encoding disc 5 to rotate synchronously with the first encoding disc 4. When a pedaling force is applied, the first encoding disc 4 and the second encoding disc 5 rotate asynchronously, and the time difference between the first encoding disc 4 and the second encoding disc 5 is a first time length observed in the axial direction. The light sensing structure 2 identifies the first time length to form a torque signal.

[0043] Specifically, the core lies in detecting the change of pedaling torque by the relative motion of the first and second encoding disks 5. The crank 1 drives the second encoding disk 5 to rotate synchronously through the elastic rotating structure 3, and the light sensing structure 2 detects the time difference between the first encoding disk 4 and the second encoding disk 5 to generate a torque signal. When the pedaling force is applied, due to the existence of the elastic structure, the two encoding disks will produce asynchronous rotation, and the time difference is accurately perceived by the light sensing structure 2 and forms a signal. This design effectively solves the problem that the traditional torque sensor is not sensitive to the small torque change. In a specific embodiment, such as in the low-speed riding scene of an electric bicycle, the rider pedals with small force, and due to the limitations of the traditional torque sensor design, it is difficult to respond timely and accurately to these small torque changes. The core problem is that the traditional sensor has low accuracy, and a large torque change is often needed to trigger the adjustment of the power-assisted system. In this new self-identification mechanism, the crank 1 drives two encoding disks through the elastic rotating structure 3, of which the first encoding disk is directly associated with the light sensing structure 2, and the second encoding disk is connected with the crank 1. When the pedaling force changes slightly, the first encoding disk 4 and the second encoding disk 5 will produce slight asynchronous rotation, i.e. a very small time difference. The photosensitive sensor 11 accurately perceives the time difference between the two encoding disks and quickly converts this difference into a torque signal. Compared with the traditional sensor that relies on direct detection of physical torque, this time difference-based detection method is more sensitive and can capture small torque changes. Therefore, when the rider starts at low speed or accelerates slightly, even if the pedaling force is small, the slight rotation difference of the encoding disks can be accurately detected, and the power-assisted system will quickly respond to adjust the output of the motor 13 to provide appropriate assistance, ensuring the smoothness of the riding experience. This time difference-based torque recognition method breaks through the accuracy limit of traditional sensors and effectively solves the problem of low sensitivity. The asynchronous motion of the first encoding disk 4 and the second encoding disk 5 through the conversion of the time difference enhances the real-time detection, especially suitable for complex riding scenarios such as frequent acceleration or gear shifting, to achieve smooth power output of the electric bicycle. During the actuation process, the pedaling force driving structure operates and the small angle change between the encoding disks is captured by the light sensing structure 2, thereby achieving accurate sensing of different forces and providing timely and intelligent assistance adjustment for the rider.

[0044] More, the crank 1 is in clearance fit with the elastic rotating structure 3, the elastic rotating structure 3 further comprises a claw cover 6 and a reset elastic member 7, the claw cover 6, the first encoding disc 4 and the second encoding disc 5 are all arranged on the claw cover 6, and the claw cover 6 is connected between the crank 1 and the first encoding disc 4. The reset elastic member 7 is arranged on the contact surface of the claw cover 6 and the crank 1, the reset elastic member 7 is arranged away from the contact surface of the claw cover 6 and the first encoding disc 4, and one end of the reset elastic member 7 abuts against the claw cover 6, and the other end of the reset elastic member 7 abuts against the crank 1. When the pedaling force is applied, the first encoding disc 4 and the second encoding disc 5 rotate asynchronously, at this time, when observed along the axial direction, the crank 1 extrudes the reset elastic member 7, the reset elastic member 7 drives the crank 1 to reset, and the first encoding disc 4 and the second encoding disc 5 rotate synchronously

[0045] Specifically, on the basis of the last design, the reset elastic member 7 and the claw cover 6 are added. The reset elastic member 7 is arranged between the claw cover 6 and the crank 1, with the increase of the pedaling force, the crank 1 extrudes the reset elastic member 7, so that the first and second encoding discs 5 generate relative angular displacement. After the rider stops applying force, the reset elastic member 7 automatically restores the position of the crank 1, so that the encoding discs rotate synchronously again. The structure effectively reduces the structural delay or error caused by the change of the moment through the restoring force of the elastic member, and ensures the accuracy of the pedaling moment detection and the response speed of the system. The addition of the elastic member not only provides sufficient elastic absorption during instantaneous pedaling action, but also prevents the wear or precision decline of the sensor during continuous use through the reset function. The claw cover 6 serves as a protection component, fixes the two encoding discs, and provides additional mechanical support for the long-time operation of the whole system, ensuring that the system can operate stably and efficiently.

[0046] More, the light sensing structure 2 has a minimum sensing angle, when observed along the central axis of the width of the crank 1, the minimum sensing angle is 0.5°-1.5°, and when the pedaling force is applied, the first encoding disc 4 and the second encoding disc 5 have a limit angular displacement difference, and the limit angular displacement difference is 1°.

[0047] Specifically, by designing the minimum sensing angle and the limit angular displacement difference between the encoding discs, the accuracy and response speed of the system are improved. The minimum sensing angle is set to 0.5°-1.5°, which ensures that effective signals can be generated even in the case of small angular displacement. This design is particularly suitable for processing subtle moment changes, such as when the rider pedals slightly, the light sensing structure 2 can still capture the angular displacement difference and generate accurate moment signals, ensuring timely adjustment of auxiliary power during riding. At the same time, the limit angular displacement difference is 1°, which ensures the accurate transmission of the moment signal in the case of large pedaling force.

[0048] Further, the claw cover 6 is provided with a first reset slot group 8 at the position opposite to the reset elastic member 7, and the crank 1 is provided with a second reset slot group 9 at the position opposite to the reset elastic member 7.

[0049] Viewed along the direction perpendicular to the rotation direction of the first encoding disc 4, a plurality of reset elastic members 7 are arranged on the contact surface of the claw cover 6 and the crank 1, and one end of each reset elastic member 7 abuts against the first reset slot group 8, and the other end abuts against the second reset slot group 9.

[0050] Further, in the rotation direction of the first encoding disc 4, one end of the crank 1 penetrates through the elastic rotation structure 3 and the light sensing structure 2, the crank 1 is in transmission connection with the elastic rotation structure 3, the crank 1 is in rotation connection with the light sensing structure 2, and the light sensing structure 2 is in rotation connection with the elastic rotation structure 3.

[0051] Specifically, by arranging the reset slot groups on the claw cover 6 and the crank 1, the installation and working stability of the reset elastic member 7 is enhanced. The reset slot groups provide accurate guiding effect, ensuring that the reset elastic member can maintain consistent action track when being compressed and released, avoiding errors or irregular force transmission when the torque changes. The plurality of reset elastic members 7 are evenly distributed on the contact surface of the claw cover 6 and the crank 1, providing uniform reset force. The reset slot group design also reduces the damage of the elastic member caused by excessive local force, ensuring that the system can still maintain accurate reset and torque sensing function under long-term high-frequency use.

[0052] Further, the light sensing structure 2 comprises a controller 10 and a photosensitive sensor 11 arranged in the controller 10. Viewed along the direction perpendicular to the rotation direction of the first encoding disc, the controller 10 is provided with a rotation through hole 12, the crank 1 penetrates through the rotation through hole 12 and is in rotation connection with the controller 10, the controller 10 is connected with a motor 13, and the controller 10 is in electrical connection with the motor 13 and the photosensitive sensor 11. The photosensitive sensor 11 is arranged opposite to the first encoding disc 4 and the second encoding disc 5 respectively to capture the time difference of the light beam passing through the first encoding disc 4 and the second encoding disc 5 and generate an electrical signal, and the photosensitive sensor 11 is in electrical connection with the controller 10.

[0053] Specifically, one end of the crank 1 penetrates through the elastic rotation structure 3 and the light sensing structure 2, realizing the combination of transmission connection and rotation connection. This design ensures that the light sensing structure 2 can synchronously capture the torque change signal while the crank 1 drives the second encoding disc 5 to rotate. Through transmission connection, the torque is quickly transmitted from the pedaling action of the rider to the encoding disc, and through rotation connection, the synchronous rotation of the light sensing structure 2 and the encoding disc is ensured, thereby ensuring the accurate transmission of the torque signal. This connection mode reduces the mechanical loss in the middle and improves the transmission efficiency of the system.

[0054] Specifically, by setting the rotating through hole 12, the crank 1 can pass through the controller 10 and keep rotating connection with the controller 10, while the controller 10 is electrically connected with the photosensitive sensor 11 to form a complete signal processing system. When the rotation time difference of the first encoding disc 4 and the second encoding disc 5 is captured by the photosensitive sensor 11, the signal is quickly transmitted to the controller 10, and then the output of the motor 13 is adjusted through the controller 10. This design can make the torque self-identification system flexibly adjust the output power of the motor 13 according to the real-time pedaling torque change through accurate light sensing detection and electrical signal processing. The small time difference captured by the photosensitive sensor 11 is precisely processed by the controller 10, which ensures that the assist motor 13 can quickly and accurately respond to the needs of the rider.

[0055] Further, the pawl cover 6 is provided with a reset hole group on the contact surface of the crank 1. When viewed along the vertical direction of the rotation direction of the first encoding disc, the crank 1 penetrates through the reset hole group and is threadedly connected with the second encoding disc 5. The crank 1 and the reset hole group are in clearance fit.

[0056] Specifically, by setting the reset hole group on the contact surface of the pawl cover 6 and the crank 1, the reset elastic member 7 is further optimized. One end of the crank 1 penetrates through the reset hole group and is threadedly connected with the second encoding disc 5, while the crank 1 and the reset hole group are in clearance fit. This design ensures that the crank 1 can smoothly press the reset elastic member 7 when the pedaling torque changes, and realizes accurate reset effect through the hole group structure. The clearance fit further improves the flexibility of the whole structure, so that the crank 1 has better recovery ability when the torque changes, which ensures that the first encoding disc 4 and the second encoding disc 5 can quickly return to the synchronous state after pedaling, and reduces the error in torque detection.

[0057] Further, the pedaling torque self-identification mechanism of the electric bicycle further comprises a toothed disc 14, which is fixedly connected with the elastic rotating structure 3 when viewed along the axial direction.

[0058] Specifically, by increasing the toothed disc 14 structure in the torque self-identification mechanism, the toothed disc 14 is fixedly connected with the elastic rotating structure 3. This design effectively enhances the transmission performance and overall rigidity of the elastic rotating structure 3 through the fixing effect of the toothed disc 14, which ensures that the torque detection system can maintain high transmission efficiency during long-term use. At the same time, the stability of the toothed disc 14 also reduces the small error between the encoding discs, which ensures the accurate identification effect of the light sensing structure 2. As an auxiliary element for torque transmission, the toothed disc 14 enhances the torque identification ability of the whole system, so that every pedaling action of the rider can be accurately captured, thereby optimizing the output effect of the electric assist.

[0059] More, along the axial observation, the claw cover 6 is provided with a fixing hole 15, and the tooth disc 14 is bolted with the fixing hole 15.

[0060] Specifically, the tooth disc 14 is connected with the fixing hole 15 through bolts, and the fixing hole 15 is arranged on the claw cover 6. This connection mode ensures the stability between the tooth disc 14 and the claw cover 6, and further improves the structural strength of the whole torque self-identification mechanism. The bolt connection not only enhances the fixing effect, but also makes the assembly and maintenance of the structure more convenient. Through the design of the fixing hole 15, the tooth disc 14 can remain stable during long-term operation and will not loosen or deviate due to long-term use, ensuring the accuracy and durability of the system during long-term use, and further prolonging the service life of the system.

[0061] More, the light sensing structure 2 further comprises a waterproof ring 16, and along the axial observation, the waterproof ring 16 is connected between the controller 10 and the claw cover 6, and the waterproof ring 16 is in interference fit with the controller 10 and the claw cover 6.

[0062] Specifically, by increasing the waterproof ring 16 in the light sensing structure 2, the waterproof ring 16 is connected between the controller 10 and the claw cover 6, and is in interference fit with both. This design effectively improves the protection performance of the system, avoids impurities such as water and dust from entering the light sensing structure 2, and causes the photosensitive sensor 11 to be damaged or fail. The setting of the waterproof ring 16 not only prolongs the service life of the system, but also improves the adaptability of the system in harsh environments. Through the sealing protection of the waterproof ring 16, it is ensured that the whole torque self-identification system can still maintain high efficiency and stable working state in complex outdoor riding environment, and the reliability of the system is improved.

[0063] The above is only an embodiment of the present application, and it should be noted that for those skilled in the art, without departing from the creative concept of the present application, improvements can be made, but these all belong to the protection scope of the present application.

Claims

1. An electric bicycle pedaling torque self-identification mechanism, comprising a crank arranged in an axial direction, a light sensing structure, and an elastic rotating structure connected between the crank and the light sensing structure, characterized in that, The elastic rotation structure comprises: a first encoding disc, which is arranged opposite to the light sensing structure when viewed along the axial direction; a second encoding disc, which is coaxial with the first encoding disc and is nested in the same plane as the first encoding disc, the crank penetrates through the elastic rotation structure and is fixedly connected with the second encoding disc, and the crank drives the second encoding disc to rotate synchronously with the first encoding disc; wherein, when the pedaling force is applied, the first encoding disc and the second encoding disc rotate asynchronously, and when viewed along the axial direction, the light sensing structure passes through the time difference between the first encoding disc and the second encoding disc, which is a first time length, and the light sensing structure identifies the first time length to form a torque signal.

2. The electric bicycle pedaling torque self-identification mechanism according to claim 1, characterized in that, The crank is clearance-fitted with the elastic rotation structure, and the elastic rotation structure further comprises: a claw cover, the first encoding disc and the second encoding disc are arranged on the claw cover, and the claw cover is connected between the crank and the first encoding disc; a reset elastic member, which is arranged on the contact surface between the claw cover and the crank, the reset elastic member is arranged away from the contact surface between the claw cover and the first encoding disc, one end of the reset elastic member abuts against the claw cover, and the other end of the reset elastic member abuts against the crank; wherein, when the pedaling force is applied, the first encoding disc and the second encoding disc rotate asynchronously, at this time, when viewed along the axial direction, the crank presses the reset elastic member, the reset elastic member drives the crank to reset, and the first encoding disc and the second encoding disc rotate synchronously.

3. The electric bicycle pedaling torque self-identification mechanism according to claim 2, characterized in that, The light sensing structure has a minimum sensing angle, and when viewed along the central axis of the crank width, the minimum sensing angle is 0.5°-1.5°, and when the pedaling force is applied, the first encoding disc and the second encoding disc have a limit angular displacement difference, and the limit angular displacement difference is 1°.

4. The electric bicycle pedaling torque self-identification mechanism according to claim 2, characterized in that, The claw cover is surrounded by a first reset slot group at the position opposite to the reset elastic member, and the crank is surrounded by a second reset slot group at the position opposite to the reset elastic member; when viewed along the direction perpendicular to the rotation direction of the first encoding disc, a plurality of reset elastic members are arranged on the contact surface between the claw cover and the crank, and one end of each reset elastic member abuts against the first reset slot group, and the other end of each reset elastic member abuts against the second reset slot group.

5. The electric bicycle pedaling torque self-identification mechanism according to claim 2, characterized in that, In the rotation direction of the first encoding disc, one end of the crank penetrates through the elastic rotation structure and the light sensing structure, the crank is in transmission connection with the elastic rotation structure, the crank is in rotation connection with the light sensing structure, and the light sensing structure is in rotation connection with the elastic rotation structure.

6. The electric bicycle pedaling torque self-identification mechanism according to claim 5, characterized in that, The light sensing structure comprises a controller and a photosensitive sensor arranged in the controller; when viewed along the direction perpendicular to the rotation direction of the first encoding disc, the controller is provided with a rotation through-hole, the crank penetrates through the rotation through-hole and is in rotation connection with the controller, the controller is externally connected with a motor, and the controller is in electrical connection with the motor and the photosensitive sensor; the photosensitive sensor is arranged opposite to the first encoding disc and the second encoding disc at both ends to capture the time difference of the light beam passing through the first encoding disc and the second encoding disc and generate an electrical signal, and the photosensitive sensor is in electrical connection with the controller.

7. The electric bicycle pedaling torque self-identification mechanism according to claim 2, characterized in that, The claw cover is provided with a reset hole group on the contact surface of the crank, and the crank penetrates through the reset hole group and is threadedly connected with the second encoding disc at one end, and the crank is in clearance fit with the reset hole group.

8. The electric bicycle pedaling torque self-identification mechanism according to claim 2, characterized in that, The pedal torque self-identification mechanism of the electric bicycle further comprises a toothed disc, which is fixedly connected with the elastic rotating structure in the axial direction.

9. The electric bicycle pedaling torque self-identification mechanism according to claim 8, characterized in that, The claw cover is provided with a fixing hole in the form of an open ring in the axial direction, and the toothed disc is boltedly connected with the fixing hole.

10. The electric bicycle pedaling torque self-identification mechanism according to claim 6, characterized in that, The light sensing structure further comprises a waterproof ring, which is connected between the controller and the claw cover in the axial direction, and is in interference fit with the controller and the claw cover.

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