Driving wheel mechanism pedaling force sensing device

Abstract

The utility model discloses a driving wheel mechanism pedaling force sensing device which comprises a driving wheel mechanism arranged on a motor shaft on the outer side of an end cover of a hub motor and a torque sensing assembly arranged in the driving wheel mechanism, the driving wheel mechanism comprises a driving wheel installation sleeve, and at least one driving wheel is fixed outside the driving wheel installation sleeve. The transmission wheel is used for being connected and fixed to an output wheel on a center shaft of the electric bicycle through a flexible traction piece, and pedals are fixed to the two ends of the center shaft through cranks. The torque sensing device is characterized in that the torque sensing assembly comprises a deformation shaft sleeve arranged on the motor shaft, a strain gauge is attached to the deformation shaft sleeve, and the inner circumference of the transmission wheel installation sleeve makes contact with the outer circumference of the deformation shaft sleeve through a plurality of bearings so that the radial component force, transmitted to the transmission wheel installation sleeve, of the middle shaft treading force can be transmitted to the deformation shaft sleeve. The pedal force sensing device of the driving wheel mechanism is higher in torque signal acquisition precision, simple in structure and easy to assemble.

Description

Technical Field

[0001] The utility model relates to a pedal force sensing device for a transmission wheel mechanism. Background Art

[0002] Due to component integration considerations, existing electric bicycles typically mount a torque sensor assembly, used to detect pedaling force, on the drive wheel mechanism outside the hub motor to form a drive wheel mechanism pedaling force sensor. Common drive wheel mechanism pedaling force sensors currently available on the market primarily employ a strain gauge element within the torque sensor assembly mounted on a relatively rotating drive wheel mounting sleeve. This sleeve also houses a drive wheel (typically a single or multi-stage sprocket). When a rider pedals, the force from the pedals drives the bottom crank and output wheel (crankset), driving the chain. This in turn rotates the drive wheel, transmitting torque. This forces the drive wheel mounting sleeve, causing it to slightly deform. The strain gauge senses this deformation, which is then converted by the signal processing circuit within the torque sensor assembly to generate a torque detection signal.

[0003] However, after practical application, we found that the above-mentioned transmission wheel mechanism pedal force sensor device exposed the following problems:

[0004] 1. The torque sensor assembly cannot form a modular component with the transmission wheel mechanism that is easy to assemble. This is because, on the one hand, the existing torque sensor assembly is usually installed on the transmission wheel mounting sleeve or the motor shaft outside it. Not only does it have many parts and is cumbersome to disassemble and assemble, but it is also difficult to ensure the sealing of the circuit components.

[0005] On the other hand, since the strain element in the torque sensor assembly is fixed to the rotating transmission wheel mounting sleeve, its signal output cannot be directly connected using a signal line, but can only be led out using wireless induction of the inner and outer coils. However, in this method, the inner and outer coils must be installed deep inside the transmission wheel mounting sleeve, and in order to avoid the outer bearings, the installation position is close to the inside (at the connection end between the transmission wheel mechanism and the hub motor). In addition, a corresponding bracket is required to fix the PCB board of the coil. The structure is complex, with many parts, and assembly, maintenance and disassembly are very cumbersome and inconvenient, resulting in low production efficiency and high maintenance costs.

[0006] 2. Due to the transmission loss inherent in the wireless induction method of the internal and external coils mentioned above, and the susceptibility of the signal to interference, the output strength and accuracy of the signal are far inferior to the output method of direct connection of the signal line. This results in a reduction in the accuracy and reliability of the final torque detection data.

[0007] 3. The composition of the force detected and obtained from the transmission wheel mounting sleeve is relatively complex. It includes the radial tension applied by the chain to the transmission wheel and then acting on the transmission wheel mounting sleeve, as well as the torque generated by the transmission wheel driving the transmission wheel mounting sleeve to rotate. It may also include the feedback force of the hub shell acting on the transmission wheel mounting sleeve through the ratchet pawl one-way clutch, etc. This makes it difficult to accurately and effectively identify the force actually transmitted by the pedaling force, resulting in the detection accuracy of the torque sensing component being affected.

[0008] The current response in the industry is usually to use complex signal processing circuits to identify and distinguish forces, but this type of signal processing circuit is expensive and the actual effect is not ideal. Summary of the Invention

[0009] The purpose of the utility model is to provide a driving wheel mechanism pedal force sensing device to address the deficiencies of the prior art mentioned in the background technology, which not only has a simple overall structure and is easy to assemble, but also has a higher torque signal acquisition accuracy.

[0010] The technical solution of the utility model is: a transmission wheel mechanism pedal force sensing device, including a transmission wheel mechanism mounted on the motor shaft outside the end cover of the hub motor and a torque sensing component arranged therein, the transmission wheel mechanism including a transmission wheel mounting sleeve, at least one transmission wheel fixed to the outside of the transmission wheel mounting sleeve, the transmission wheel being used to be connected to the output wheel fixed on the middle shaft of the electric bicycle via a flexible traction member, and the pedals are fixed at both ends of the middle shaft via cranks; it is characterized in that: the torque sensing component includes a set of deformable sleeves arranged on the motor shaft, strain gauges are attached to the deformable sleeves, and the inner periphery of the transmission wheel mounting sleeve is in contact with the outer periphery of the deformable sleeve via a plurality of bearings, so as to transmit the radial component of the pedal force of the middle shaft transmitted to the transmission wheel mounting sleeve to the deformable sleeve.

[0011] Furthermore, the torque sensing assembly in the present invention also includes a signal processing PCB board fixed to the deformable sleeve and electrically connected to the strain gauge. The lead wires of the signal processing PCB board are led out to the outside of the transmission wheel mechanism through the slots opened in the deformable sleeve.

[0012] Furthermore, the inner periphery of the transmission wheel mounting sleeve contacts the outer periphery of the deformable sleeve via two bearings spaced front and rear, wherein the bearing close to the hub motor is the front bearing, and the other is the rear bearing, and a spacer sleeve is sandwiched between the two bearings.

[0013] Preferably, in order to further enhance the packaging integrity of the torque sensor assembly and the transmission wheel mechanism in this case and facilitate their overall modular assembly and disassembly, we make the following improvements:

[0014] One is to also arrange the signal processing PCB board between the two bearings, thereby effectively ensuring the sealing of electrical components.

[0015] The second is to set the strain gauge between the two bearings, which is also to more effectively ensure the sealing of electrical components.

[0016] The axial fixing structure for the two bearings on the inner side of the transmission wheel mounting sleeve in the utility model is further as follows: a limiting convex step is provided at the front position of the inner circumference of the transmission wheel mounting sleeve, the front end of the front bearing is against the limiting convex step, and the rear end is against the front end of the spacer sleeve for axial positioning; and the front end of the rear bearing is against the rear end of the spacer sleeve, and the rear end is against a bearing positioning ring embedded in the inner circumference groove of the transmission wheel mounting sleeve for axial positioning.

[0017] On the basis of the above-mentioned double-bearing structural design, the axial fixing structure of the deformable sleeve in this case is further as follows: the front end of the rear bearing is abutted against a limiting protrusion provided on the deformable sleeve, and at the same time, the rear end of the rear bearing is abutted against a set of tightening sleeves provided on the deformable sleeve, and the rear end of the tightening sleeve is tightened against a sleeve positioning ring embedded in the outer peripheral groove of the deformable sleeve, thereby axially fixing the deformable sleeve.

[0018] Furthermore, the rear end of the deformable sleeve in the present invention is axially limited by a nut threadedly connected to the motor shaft, and a cover plate is fixed to the end of the transmission wheel mounting sleeve, and a clearance hole is opened on the cover plate for the motor shaft and the nut to move in and out, and an opening is provided on the cover plate for leading out the lead wire.

[0019] Furthermore, like conventional technology, the transmission wheel mounting sleeve in the present invention is connected to the end cover of the hub motor via a ratchet pawl one-way clutch. A ratchet is fixed on the transmission wheel mounting sleeve, which is connected and cooperated with the pawl provided on the end cover of the hub motor to form the ratchet pawl one-way clutch; or a pawl is fixed on the transmission wheel mounting sleeve, which is connected and cooperated with the ratchet provided on the end cover of the hub motor to form the ratchet pawl one-way clutch.

[0020] Furthermore, in the present invention, the transmission wheel is a sprocket, the output wheel is a chainring, and the corresponding flexible traction member is a chain; or the transmission wheel and the output wheel are both pulleys, and the corresponding flexible traction member is a belt. As in conventional practice, the transmission wheel can be provided singly or in plurality to accommodate multi-speed shifting.

[0021] The working principle of this utility model is as follows:

[0022] During cycling, the pedaling force applied by the user to the pedals at both ends of the central axle is transmitted through the output wheel and flexible traction member to the drive wheel and its fixed drive wheel mounting sleeve. The drive wheel mounting sleeve then applies the radial component (tension) of the pedaling force to the deformable sleeve via the inner bearing, causing the deformable sleeve to slightly deform. The strain gauge senses this micro-deformation and generates a sensing signal. After processing by the signal processing PCB, the signal is output as a torque signal to the e-bike controller, thereby controlling the output speed of the e-bike's hub motor. Depending on the pedaling force, the deformation of the deformed sleeve sensed by the strain gauge will also change, and the magnitude of the torque signal will also change, thus achieving the function of accurately detecting the pedaling force.

[0023] The advantages of the utility model are:

[0024] The utility model has not only a simple overall structure and is easy to assemble, but also has higher torque signal acquisition accuracy. Its specific advantages are as follows:

[0025] 1. In the structural design of this utility model, radial force is transmitted between the deformable sleeve in the torque sensor assembly and the drive wheel mounting sleeve via a bearing. This allows the pedaling force, after being transmitted to the drive wheel and the drive wheel mounting sleeve via the output wheel and the flexible traction member, to be directly applied to the deformable sleeve, forcing it to deform and then sensed by the strain gauge. This eliminates interference from other external forces, enhances the accuracy of pedaling force recognition, and greatly improves the accuracy of the final detection data of the entire pedaling force sensor device. It also saves the production cost of the signal processing circuit that uses complex calculations in the prior art.

[0026] 2. In the structural design of the present invention, the torque sensing assembly is entirely fixed on a non-rotating deformable sleeve in the transmission wheel mechanism. The signal of the strain gauge can be directly connected to the signal processing PCB board by wires, without the need to use the wireless induction method of internal and external coils to lead out. Therefore, the transmission loss and signal susceptibility to interference problems existing in the wireless induction method of internal and external coils are eliminated, which makes the output strength and accuracy of the signal qualitatively improved, thereby ensuring the accuracy and reliability of the final torque detection data.

[0027] 3. In the structural design of the utility model, since the strain gauge signal data extraction method of the wireless induction of the internal and external coils is eliminated, not only the components including the internal and external coils, the corresponding brackets, etc. are saved, but also the volume space inside the transmission wheel mounting sleeve is greatly saved, so that the radial size of the pedal force sensing device of the entire transmission wheel mechanism is reduced, the structure is simpler and more compact, and the assembly, maintenance and disassembly are extremely convenient, which effectively improves the production efficiency while reducing the maintenance cost.

[0028] 4. The utility model integrates the transmission wheel mechanism and the torque sensing assembly into a standard component, which is convenient for modular production and can be assembled and disassembled from the motor shaft as a whole, which can simplify the company's production and manufacturing process and save production costs. At the same time, the pedal force sensing device in this case that integrates the transmission wheel mechanism and the torque sensing assembly has a strong overall packaging performance, which can ensure the sealing and reliability of internal circuit components. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] Figure 1 This is the main axial cross-sectional view of the present invention;

[0031] Figure 2 This is a radial front view of the utility model in a state of being connected to the bottom bracket chainring via a chain drive;

[0032] Figure 3 This is a separate radial front view of the present invention;

[0033] Figure 4 This is a schematic diagram of the arrangement of strain gauges in the second embodiment of the present invention;

[0034] Figure 5 Schematic diagram of the arrangement position of strain gauges in the third embodiment of the present invention.

[0035] Among them: 1. Hub motor; 101. End cover; 2. Motor shaft; 3. Drive wheel mounting sleeve; 301. Limiting cam; 4. Drive wheel; 5. Flexible traction member; 6. Middle shaft; 7. Chainring; 8. Pedal; 9. Deformable sleeve; 901. Slot; 902. Limiting cam; 10. Strain gauge; 11. Bearing; 12. Signal processing PCB board; 13. Spacer; 14. Bearing locating ring; 15. Tightening sleeve; 16. Sleeve locating ring; 17. Nut; 18. Cover plate; 19. Crank. DETAILED DESCRIPTION

[0036] Example: The following combination Figures 1 to 3 The specific embodiment of the driving wheel mechanism pedal force sensing device provided by the present invention is described as follows:

[0037] First, similar to conventional technology, it comprises an in-wheel motor 1, a drive wheel mechanism mounted on the motor shaft 2 outside the end cap 101 of the in-wheel motor 1, and a torque sensor assembly housed within the drive wheel mechanism. Both ends of the motor shaft 2 are secured to the frame of the electric bicycle (omitted in the figure). The drive wheel mechanism includes a drive wheel mounting sleeve 3, to the exterior of which are secured multiple drive wheels 4 for shifting speeds. Each drive wheel 4 is connected to an output wheel secured to the electric bicycle's central axle 6 via flexible traction members 5. The central axle 6 is secured to pedals 8 at both ends via cranks 19. In this embodiment, the drive wheels 4 are all sprockets, with the output wheel being a chainring 7, and the corresponding flexible traction members 5 being chains.

[0038] As in the known technology, the front end of the transmission wheel mounting sleeve 3 is connected to the end cover 101 of the hub motor 1 via a ratchet pawl one-way clutch (omitted in the figure). Specifically, a ratchet is fixed on the transmission wheel mounting sleeve 3, which is connected and cooperated with the pawl provided on the end cover of the hub motor to form the ratchet pawl one-way clutch.

[0039] The core improvement of the present utility model is that the torque sensing assembly has a set of deformable sleeves 9 arranged on the motor shaft 2, and a strain gauge 10 is attached to the deformable sleeves 9. The inner periphery of the transmission wheel mounting sleeve 3 contacts the outer periphery of the deformable sleeve 9 via two bearings 11 spaced apart in front and behind, so as to transmit the radial component of the pedaling force of the middle shaft 6 on the transmission wheel mounting sleeve 3 to the deformable sleeve 9.

[0040] Still like Figure 1 As shown, the torque sensing assembly in this embodiment further includes a signal processing PCB board 12 fixed to the deformable shaft sleeve 9 and electrically connected to the strain gauge 10. The lead wires (omitted in the figure) of the signal processing PCB board 12 are led out to the outside of the transmission wheel mechanism through the slot 901 provided in the deformable shaft sleeve 9.

[0041] Recombination Figure 1 As shown, in this embodiment, the bearing 11 close to the hub motor 1 is the front bearing 11 (located on the left side in the figure), and the other is the rear bearing 11 (located on the right side in the figure), and a spacer sleeve 13 is sandwiched between the two bearings 11.

[0042] In order to enhance the packaging integrity of the torque sensing assembly and the transmission wheel mechanism in this case and facilitate their overall modular assembly and disassembly, the signal processing PCB board 12 in this embodiment is located between the two bearings 11. At the same time, the strain gauge 10 is also located between the two bearings 11, effectively ensuring the sealing of the electrical components.

[0043] In this embodiment, a limiting step 301 is provided at the front position of the inner circumference of the transmission wheel mounting sleeve 3. The front end of the front bearing 11 abuts against the limiting step 301, and the rear end abuts against the front end of the spacer sleeve 13 for axial positioning; and the front end of the rear bearing 11 abuts against the rear end of the spacer sleeve 13, and the rear end abuts against a bearing positioning ring 14 embedded in the inner circumference groove of the transmission wheel mounting sleeve 3 for axial positioning.

[0044] In this embodiment, the front end of the rear bearing 11 abuts against a limiting protrusion 902 provided on the deformable sleeve 9, and at the same time, the rear end of the rear bearing 11 abuts against a set of tightening sleeves 15 provided on the deformable sleeve 9, and the rear end of the tightening sleeve 15 abuts against a sleeve positioning ring 16 embedded in the outer peripheral groove of the deformable sleeve 9, thereby axially fixing the deformable sleeve 9.

[0045] In this embodiment, the rear end of the deformable sleeve 9 is axially limited by a nut 17 that is threadedly connected to the motor shaft 2. At the same time, a cover plate 18 is fixed to the end of the transmission wheel mounting sleeve 3. The cover plate 18 has a clearance hole for the motor shaft 2 and the nut 17 to move in and out. At the same time, the cover plate 18 is provided with an opening (not marked) for leading out the lead wire.

[0046] Combine Figures 1 to 3 As shown, the working principle of the above embodiment is as follows:

[0047] During riding, the pedaling force applied by a person to pedals 8 at either end of the central axle 6 is transmitted through the crankset 7 and flexible traction member 5 (chain) to the drive wheel 4 (sprocket) and its attached drive wheel mounting sleeve 3. The drive wheel mounting sleeve 3 then applies the radial component (tension) of the pedaling force on the central axle 6 to the deformable sleeve 9 via the inner bearing 11, causing the sleeve 9 to slightly deform. This micro-deformation is sensed by the strain gauge 10, which generates a sensing signal. After processing by the signal processing PCB 12, the signal is output as a torque signal to the e-bike controller (not shown), thereby controlling the output speed of the e-bike's hub motor 1. Depending on the pedaling force, the deformation of the deformable sleeve 9 sensed by the strain gauge 10 varies, and the magnitude of the torque signal also varies, thus achieving the function of accurately detecting the pedaling force.

[0048] Example 2: The difference between this example and example 1 is that the strain gauge 10 is arranged on the deformable sleeve 9 outside the two bearings 11, specifically in front of the front bearing 11, as shown in FIG. Figure 4 As shown, of course the rest of the structure of this embodiment is the same as that of embodiment 1.

[0049] Example 3: The difference between this example and example 1 is that the strain gauge 10 is arranged on the deformable sleeve 9 outside the two bearings 11, specifically behind the rear bearing 11, as shown in FIG. Figure 5As shown, of course the rest of the structure of this embodiment is the same as that of embodiment 1.

[0050] In the above-mentioned structural design of the present invention, the radial force transmission connection between the deformable sleeve 9 in the torque sensor assembly and the transmission wheel mounting sleeve 3 is completed through the bearing 11. This allows the pedaling force to be transmitted to the transmission wheel 4 and the transmission wheel mounting sleeve 3 via the chainring 7 and the flexible traction member 5. Then, a precise radial tension can be directly applied to the deformable sleeve 9 to force it to deform and be sensed by the strain gauge 10, thereby eliminating the interference factors of other external forces, enhancing the recognition accuracy of the pedaling force, and greatly improving the accuracy of the final detection data of the entire pedaling force sensor device. It also saves the production cost of the signal processing circuit that uses complex calculations in the existing technology.

[0051] In addition, in the above-mentioned structural design, the torque sensing assembly is entirely fixed on the non-rotating deformable sleeve 9 in the transmission wheel mechanism. The signal of the strain gauge 10 can be directly connected to the signal processing PCB board 12 by wires without the need to use the wireless induction method of the internal and external coils to lead out. Therefore, there is no transmission loss and signal susceptibility to interference problems existing in the wireless induction method of the internal and external coils, which makes the output strength and accuracy of the signal qualitatively improved, thereby ensuring the accuracy and reliability of the final torque detection data.

[0052] In addition, in the above-mentioned structural design, since the signal data extraction method of the strain gauge 10 for wireless induction of the internal and external coils is eliminated, not only the components including the internal and external coils, the corresponding brackets, etc. are saved, but also the volume space inside the transmission wheel mounting sleeve 3 is greatly saved, so that the radial size of the pedal force sensing device of the entire transmission wheel mechanism is reduced, the structure is simpler and more compact, and the assembly, maintenance and disassembly are extremely convenient, which effectively improves the production efficiency while reducing the maintenance cost.

[0053] What is particularly important is that the present invention integrates the transmission wheel mechanism and the torque sensing assembly into a standard component, which is convenient for modular production and can be assembled and disassembled as a whole from the motor shaft 2, which can simplify the company's production and manufacturing processes and save production costs. At the same time, the pedal force sensing device in this case that integrates the transmission wheel mechanism and the torque sensing assembly has a strong overall packaging performance, which can ensure the sealing and reliability of internal circuit components.

[0054] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any modifications based on the spirit of the main technical solution of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A driving wheel mechanism pedal force sensing device, comprising a driving wheel mechanism mounted on a motor shaft (2) outside an end cap (101) of a hub motor (1) and a torque sensing assembly disposed therein, the driving wheel mechanism comprising a driving wheel mounting sleeve (3), at least one driving wheel (4) being fixed to the outside of the driving wheel mounting sleeve (3), the driving wheel (4) being connected to an output wheel on a central axis (6) of an electric bicycle via a flexible traction member (5), and pedals (8) being fixed to both ends of the central axis (6) via cranks (19); characterized in that: The torque sensing assembly includes a set of deformable sleeves (9) arranged on the motor shaft (2), a strain gauge (10) is attached to the deformable sleeve (9), and the inner periphery of the transmission wheel mounting sleeve (3) contacts the outer periphery of the deformable sleeve (9) via a plurality of bearings (11) to transmit the radial component of the pedaling force of the middle shaft (6) on the transmission wheel mounting sleeve (3) to the deformable sleeve (9).

2. The driving wheel mechanism pedal force sensing device according to claim 1, characterized in that: The torque sensing assembly further comprises a signal processing PCB board (12) fixed to the deformable shaft sleeve (9) and electrically connected to the strain gauge (10), wherein the lead wires of the signal processing PCB board (12) are led out to the outside of the transmission wheel mechanism via a slot (901) provided in the deformable shaft sleeve (9).

3. The driving wheel mechanism pedal force sensing device according to claim 2, characterized in that The inner periphery of the transmission wheel mounting sleeve (3) contacts the outer periphery of the deformable shaft sleeve (9) via two bearings (11) spaced apart at the front and rear ends, wherein the bearing (11) close to the hub motor (1) is the front bearing (11), and the other is the rear bearing (11), and a spacer sleeve (13) is sandwiched between the two bearings (11).

4. The driving wheel mechanism pedal force sensing device according to claim 3, characterized in that The signal processing PCB board (12) is located between the two bearings (11).

5. The driving wheel mechanism pedal force sensing device according to claim 3, characterized in that The strain gauge (10) is located between the two bearings (11).

6. The driving wheel mechanism pedal force sensor device according to claim 3, characterized in that A limiting convex step (301) is provided at a front position of the inner circumference of the transmission wheel mounting sleeve (3), and the front end of the front bearing (11) abuts against the limiting convex step (301), and the rear end abuts against the front end of the spacer (13) for axial positioning; and the front end of the rear bearing (11) abuts against the rear end of the spacer (13), and the rear end abuts against a bearing positioning ring (14) embedded in a groove on the inner circumference of the transmission wheel mounting sleeve (3) for axial positioning.

7. The driving wheel mechanism pedal force sensing device according to claim 6, characterized in that The front end of the rear bearing (11) abuts against a limiting protrusion (902) provided on the deformable shaft sleeve (9), and the rear end of the rear bearing (11) abuts against a set of top sleeves (15) provided on the deformable shaft sleeve (9), and the rear end of the top sleeve (15) abuts against a shaft sleeve positioning ring (16) embedded in the outer peripheral groove of the deformable shaft sleeve (9), thereby axially fixing the deformable shaft sleeve (9).

8. The driving wheel mechanism pedal force sensing device according to claim 7, characterized in that The rear end of the deformable sleeve (9) is axially limited by a nut (17) connected to the motor shaft (2) through a thread, and a cover plate (18) is fixed to the end of the transmission wheel mounting sleeve (3). The cover plate (18) is provided with a clearance hole for the motor shaft (2) and the nut (17) to move in and out, and the cover plate (18) is provided with an opening for leading out a lead wire.

9. The driving wheel mechanism pedal force sensor device according to claim 1, characterized in that: The transmission wheel mounting sleeve (3) is connected to the end cover (101) of the hub motor (1) via a ratchet pawl one-way clutch; a ratchet is fixed on the transmission wheel mounting sleeve (3), which is connected and matched with a ratchet provided on the end cover (101) of the hub motor (1) to form the ratchet pawl one-way clutch; or a ratchet is fixed on the transmission wheel mounting sleeve (3), which is connected and matched with a ratchet provided on the end cover (101) of the hub motor (1) to form the ratchet pawl one-way clutch.

10. The driving wheel mechanism pedal force sensor device according to claim 1, characterized in that: The transmission wheel (4) is a sprocket, the output wheel is a toothed disc (7), and the corresponding flexible traction member (5) is a chain; or the transmission wheel (4) and the output wheel are both pulleys, and the corresponding flexible traction member (5) is a belt.

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