Pedal for riding equipment and riding equipment

Abstract

The invention relates to a pedal for riding equipment and the riding equipment, the pedal comprises a pedal and a pedal shaft, the pedal is connected to the pedal shaft, the pedal shaft comprises an outer pedal shaft and an inner pedal shaft, and an outer shaft cavity is formed in the outer pedal shaft; the inner pedal shaft is coaxially arranged in the outer shaft cavity and is rigidly connected with the outer pedal shaft, and a strain sensor is arranged on the outer surface of the inner pedal shaft; wherein at least one mounting cavity is formed between the outer surface of the inner pedal shaft and the inner surface of the outer pedal shaft, and the strain sensor is located in the mounting cavity and connected to the outer surface of the inner pedal shaft. During assembly, the strain sensor is firstly fixed on the outer surface of the inner pedal shaft and then is connected into the outer pedal shaft along with the inner pedal shaft, so that the operation space is large, and the surface mounting process is simple; and the strain sensor is arranged in the mounting cavity formed between the inner pedal shaft and the outer pedal shaft, so that the safety and the reliability are higher.

Description

Technical Field

[0001] This invention belongs to the field of fitness equipment technology, specifically, it relates to a pedal and cycling device for cycling equipment. Background Technology

[0002] Pedal power meters have gradually become the mainstream product for bicycle power monitoring due to their advantages such as easy installation and independent measurement of left and right feet. Among them, the arrangement of strain sensors directly affects the measurement accuracy and product reliability, and is a core technical issue in the design.

[0003] Currently, there are two main technical solutions for the placement of strain sensors: external strain gauges and internal strain gauges. The external strain gauge solution involves attaching the strain sensor to the outer surface of the pedal shaft, directly exposing the strain gauge, which is susceptible to corrosion from moisture and dust, resulting in poor long-term reliability. It also requires an additional protective shell, leading to a bulky pedal shaft with a significantly different appearance from traditional pedals, and making it prone to interference with shoes.

[0004] Built-in strain gauges involve attaching strain gauges to the inner wall of a hollow pedal shaft, using the pedal shaft itself as a protective layer. The disadvantages are: the pedal shaft has a narrow, blind hole, limiting operating space; the strain gauges are placed in a visual blind spot, making it difficult to guarantee accuracy and adhesion quality; the process is complex, production efficiency is low, yield is difficult to guarantee, and maintenance is challenging.

[0005] In summary, existing technologies face a dilemma: "external designs offer good manufacturability but poor reliability, while internal designs offer good protection but poor manufacturability." How to balance measurement accuracy with manufacturability and reliability is a pressing technical challenge that needs to be addressed in this field. Summary of the Invention

[0006] The purpose of this invention is to provide a pedal and cycling device for cycling equipment, so as to solve the problems of poor reliability and low accuracy of external strain gauges and poor manufacturability and inconvenient operation of internal strain gauges in the prior art.

[0007] To achieve the above-mentioned objectives, the present invention employs the following technical solution: In one aspect, the present invention provides a pedal for a cycling device, comprising a pedal and a pedal axle, the pedal being connected to the pedal axle, the pedal axle comprising: The outer foot axle has an outer axle cavity formed inside it; An inner pedal shaft is coaxially disposed within the outer shaft cavity and rigidly connected to the outer pedal shaft. A strain sensor is disposed on the outer surface of the inner pedal shaft. At least one mounting chamber is formed between the outer surface of the inner pedal shaft and the inner surface of the outer pedal shaft, and the strain sensor is located in the mounting chamber.

[0008] In some embodiments of this application, the strain sensor is fixed to the outer surface of the inner pedal shaft by an adhesive layer, such that the strain sensor is supported only by the outer surface of the inner pedal shaft.

[0009] The strain sensor is fixed to the outer surface of the inner pedal shaft by adhesive bonding, which is easy to implement and cost-effective. The strain sensor directly senses the pure deformation of the inner shaft, resulting in higher accuracy.

[0010] In some embodiments of this application, the inner pedal shaft has a first connecting portion and a second connecting portion at both ends, and the outer pedal shaft has a first mating portion and a second mating portion at corresponding positions. The first connecting portion is threaded or interference-fitted to the first mating portion, and the second connecting portion is threaded or interference-fitted to the second mating portion. The strain sensor is disposed between the first connecting portion and the second connecting portion.

[0011] Rigid connection points between the strain sensor and the outer pedal shaft are formed on both sides by the first connecting part and the second connecting part, respectively, which ensures that the inner pedal shaft is subjected to uniform force and greatly improves the stability of the measurement.

[0012] In some embodiments of this application, a main board assembly is detachably connected to the first end of the outer foot axle. The main board assembly includes a lampshade end cap, a lamp post, and a PCB board. The lampshade end cap is detachably connected to the outer foot axle, the lamp post is connected to the lampshade end cap, the PCB board is connected to the lamp post, and the lamp post and the PCB board extend into the outer axle cavity.

[0013] The PCB board, lamp post, and lamp cover end cap are pre-connected into a whole mainboard assembly, which facilitates installation and disassembly, improves production efficiency, and facilitates subsequent maintenance and upgrades.

[0014] In some embodiments of this application, the inner pedal shaft is provided with a wire hole, and the wire harness on the strain sensor is connected to the PCB board through the wire hole.

[0015] The strain sensor leads are routed through the wire hole on the inner foot shaft, guiding the strain sensor leads from the external mounting chamber to the outer shaft cavity, thus avoiding the wire harness being squeezed or worn during assembly.

[0016] In some embodiments of this application, the inner pedal shaft is provided with an inner shaft cavity, and at least one end of the inner shaft cavity near the motherboard assembly is connected to the outer shaft cavity. A battery assembly is provided in the inner shaft cavity, and the battery assembly is connected to the PCB board. A charging port connected to the battery assembly is provided on the outer pedal shaft.

[0017] An inner shaft cavity is set in the inner pedal shaft, and the hollow part of the inner pedal shaft itself is further utilized to install the battery assembly, realizing the "layered" utilization of space and accommodating more components without increasing the volume.

[0018] In some embodiments of this application, the end of the inner step shaft opposite to the main board assembly is an open structure, on which a fastening fitting part is provided, and a fastening part is detachably connected.

[0019] In some embodiments of this application, the battery assembly includes a battery and a battery cover strip, the battery cover strip being a bendable sheet structure covering the outer periphery of the battery for installing and removing the battery.

[0020] In some embodiments of this application, the battery cover forms a three-dimensional cylindrical structure on the outer periphery of the battery. The battery cover includes an end-side covering portion and at least two peripheral covering portions formed on the periphery of the end-side covering portion. The end-side covering portion is disposed at one end of the battery, and the peripheral covering portions are disposed on the periphery of the battery. The end of the peripheral covering portion is formed with a handle portion extending to the other end of the battery for applying force during disassembly.

[0021] Replacing the traditional plastic battery compartment with a battery cover saves significant radial space and reduces costs. A handheld mechanism allows users to easily remove the battery with a simple pull. This simplifies the complex battery handling process into a single mechanical action, greatly enhancing the user experience.

[0022] In some embodiments of this application, the end-side covering portion is disposed on the side of the battery close to the motherboard assembly, and the end-side covering portion is provided with a clearance hole, through which the battery wire connected to the battery passes and connects to the PCB board.

[0023] By using clearance holes specifically for battery wiring, it is ensured that the wires will not be pulled or damaged during battery installation and removal, thus guaranteeing the long-term reliability of electrical connections.

[0024] In another aspect, the present invention also proposes a cycling device comprising the pedals described in any of the foregoing.

[0025] Compared with the prior art, the advantages and positive effects of the present invention are: The pedal involved in this application has a strain sensor for detecting pedal power installed in the mounting cavity formed between the inner pedal shaft and the outer pedal shaft, which solves the contradiction in the prior art that "external sensors are easily damaged and internal sensors are difficult to install".

[0026] The strain sensor is connected to the outer surface of the inner pedal shaft. During assembly, the strain sensor is first fixed to the outer surface of the inner pedal shaft, and then connected to the outer pedal shaft along with the inner pedal shaft. This provides a large operating space and simplifies the patching process. Furthermore, the strain sensor is located in the mounting cavity formed between the inner and outer pedal shafts, which enhances safety and reliability.

[0027] The inner and outer pedal shafts are rigidly connected, ensuring that the force applied to the pedals can be transmitted to the strain sensor on the inner shaft without damage or lag, providing a structural basis for high-precision power measurement.

[0028] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a perspective view of one embodiment of the foot pedal proposed in this invention; Figure 2 This is a plan view of one embodiment of the foot pedal proposed in this invention; Figure 3 This is an exploded view of one embodiment of the foot pedal proposed in this invention; Figure 4 This is a cross-sectional view of one embodiment of the pedal shaft proposed in this invention; Figure 5 This is a split diagram of the pedal shaft proposed in this invention; Figure 6 This is a cross-sectional view of another embodiment of the pedal shaft proposed in this invention; Figure 7 This is a schematic diagram of the battery assembly installation in the inner shaft cavity; Figure 8 yes Figure 7 Enlarged diagram of point A in the diagram; Figure 9 This is a structural diagram of the battery module; Figure 10 This is a breakdown diagram of the battery assembly; Figure 11 This is a schematic diagram of one embodiment of the battery coating. Figure 12 This is a schematic diagram of another embodiment of the battery cover strip; In the picture, 10. Pedal; 20. Fixing screw; 30. Pedal axle; 31. Charging port; 100. External foot axle; 101. Mounting chamber; 200, Inner pedal shaft; 201, Strain sensor; 210, First connecting part; 220, Second connecting part; 230, Wire through hole; 300. Battery assembly; 310. Battery; 320. Battery cover; 321. End-side covering; 322. Peripheral covering; 3221. Handhold; 323. Clearance hole; 400. Mainboard assembly; 410. Lampshade end cap; 420. Lamp post; 430. PCB board; 431. PCB adapter board; 500. Fastening parts. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0037] This embodiment provides a pedal and a cycling device for use in a cycling device. The cycling device includes a frame, a drive assembly, and pedals mounted on the drive assembly. The frame constitutes the main frame of the cycling device; the drive assembly includes a bottom bracket and cranks connected to both ends of the bottom bracket, the bottom bracket being rotatably mounted on the frame; the pedals are mounted at the ends of the cranks for the rider to pedal.

[0038] refer to Figures 1-3 The foot pedal specifically includes a pedal 10 and a pedal axle 30. A hollow connecting channel is formed on the pedal 10. The pedal axle 30 is partially connected to the inside of the connecting channel from one end and is connected by a fixing screw 20, so as to realize the rotatable connection between the pedal 10 and the pedal axle 30.

[0039] The pedal shaft 30 includes an outer pedal shaft 100 and an inner pedal shaft 200. The outer pedal shaft 100 has an outer shaft cavity, and the inner pedal shaft 200 is coaxially disposed in the outer shaft cavity and rigidly connected to the outer pedal shaft 100.

[0040] The inner pedal shaft 200 and the outer pedal shaft 100 are rigidly connected, which ensures that the force applied to the pedal can be transmitted to the strain sensor 201 on the inner shaft without damage or lag, providing a structural basis for high-precision power measurement.

[0041] refer to Figure 4 , Figure 5A strain sensor 201 is provided on the outer surface of the inner pedal shaft 200. At least one mounting chamber 101 is formed between the outer surface of the inner pedal shaft 200 and the inner surface of the outer pedal shaft 100, and the strain sensor 201 is located in the mounting chamber 101.

[0042] During assembly, the strain sensor 201 is first fixed on the outer surface of the inner pedal shaft 200, and then connected to the outer pedal shaft 100 along with the inner pedal shaft 200. The operating space is large and the patching process is simple. Moreover, the strain sensor 201 is set in the mounting chamber 101 formed between the inner pedal shaft 200 and the outer pedal shaft 100, which enhances safety and reliability.

[0043] The strain sensor 201 is fixed to the outer surface of the inner pedal shaft 200 by an adhesive layer, so that the strain sensor 201 is supported only by the outer surface of the inner pedal shaft 200. This adhesive fixing method is easy to implement and cost-effective, and the strain sensor 201 directly senses the pure deformation of the inner pedal shaft 200, resulting in higher measurement accuracy.

[0044] The inner pedal shaft 200 has a first connecting portion 210 and a second connecting portion 220 at both ends, and the outer pedal shaft 100 has a first mating portion and a second mating portion at corresponding positions. The first connecting portion 210 is threaded to the first mating portion, and the second connecting portion 220 is threaded to the second mating portion. The strain sensor 201 is disposed between the first connecting portion 210 and the second connecting portion 220. Rigid connection points are provided on both sides of the strain sensor 201 to ensure uniform force on the inner pedal shaft 200, greatly improving the stability and repeatability of the measurement.

[0045] The axial length of the mounting chamber 101 can be set according to the size of the strain sensor 201 and the measurement requirements, preferably from 8mm to 80mm.

[0046] This range ensures that the strain sensor 201 has sufficient installation space while avoiding a decrease in structural rigidity due to excessive chamber length. For miniaturized products using micro strain gauges, the length of the installation chamber 101 is preferably 8mm to 20mm; for products requiring higher measurement sensitivity and using multiple strain gauges arranged in series, the length of the installation chamber 101 is preferably 40mm to 80mm.

[0047] refer to Figure 4 When the inner pedal shaft 200 and the outer pedal shaft 100 are connected by threads, the first connecting part 210 and the second connecting part 220 are specifically external threads formed at both ends of the inner pedal shaft 200, and the first mating part and the second mating part are specifically internal threads formed at both ends of the outer pedal shaft 100.

[0048] To ensure connection reliability and force transmission efficiency, the threaded connection length L is designed to be greater than 3mm and less than 80mm. This range guarantees sufficient connection strength and torque carrying capacity while avoiding assembly difficulties and space waste caused by excessively long threads. Based on the overall dimensions of the treadle 30 and the application scenario, the threaded connection length can be further optimized to 10mm to 30mm, ensuring connection reliability while also considering space utilization efficiency.

[0049] refer to Figure 6 When using an interference fit, a small interference fit is designed on the inner pedal shaft 200, and the corresponding inner hole size of the outer pedal shaft 100 is adjusted accordingly.

[0050] The interference connection length L is designed to be greater than 1mm and less than 60mm. The interference amount is reasonably selected according to the material properties and diameter size, and is usually controlled within the range of 0.01mm to 0.03mm.

[0051] The interference fit length directly affects the connection strength and the reliability of force transmission. For pedal shafts with smaller diameters (e.g., outer diameter 8-12mm), the interference fit length is preferably 5mm to 15mm; for pedal shafts with larger diameters (e.g., outer diameter 15-20mm), the interference fit length is preferably 15mm to 30mm.

[0052] The interference fit is calculated and determined based on parameters such as the elastic modulus and thermal expansion coefficient of the inner and outer shaft materials to ensure a reliable rigid connection under temperature changes and working loads.

[0053] Refer again Figure 4 , Figure 5 In some embodiments of the application, a mainboard assembly 400 is detachably connected to the first end of the outer pedal axle 100. The mainboard assembly 400 includes a lampshade end cap 410, a charging post, and a PCB board 430. The lampshade end cap 410 is detachably connected to the outer pedal axle 100, the charging post is connected to the lampshade end cap 410, and the PCB board 430 is connected to the charging post. The charging post and the PCB board 430 extend into the outer axle cavity.

[0054] In some embodiments, a PCB adapter board 431 is also vertically connected to the PCB board 430 for connecting to the lamp post 420.

[0055] The PCB board 430, charging column and lamp cover end cap 410 are pre-connected into a whole main board assembly 400, which facilitates installation and disassembly, improves production efficiency, and facilitates subsequent maintenance and upgrades.

[0056] The inner pedal shaft 200 is provided with a wire hole 230, through which the wire harness of the strain sensor 201 is connected to the PCB board 430. The strain sensor 201 is routed through the wire hole 230 on the inner pedal shaft 200, guiding the lead wire from the external mounting chamber 101 to the outer shaft cavity, thus avoiding the wire harness being squeezed or worn during assembly.

[0057] In some embodiments of the application, the inner pedal shaft 200 has an inner shaft cavity, at least one end of which near the main board assembly 400 is connected to the outer shaft cavity. A battery assembly 300 is housed within the inner shaft cavity and connected to the PCB board 430. The outer pedal shaft 100 has a charging port 31 connected to the battery assembly 300. The inner shaft cavity within the inner pedal shaft 200 further utilizes the hollow portion of the inner pedal shaft 200 itself to mount the battery assembly 300, achieving a "layered" utilization of space and accommodating more components without increasing the overall volume.

[0058] The inner step shaft 200 has an open structure at one end away from the main board assembly 400, and a fastening mating part is provided on it. A fastening part 500 is detachably connected to the fastening mating part to fix and seal the battery assembly 300 in the inner shaft cavity.

[0059] For ease of understanding and description, the two ends of the outer pedal shaft 100 are defined as the first end and the second end, respectively. The end of the inner pedal shaft 200 closest to the first end of the outer pedal shaft 100 is also defined as the first end of the inner pedal shaft 200, and the other end is also defined as the second end of the inner pedal shaft 200.

[0060] refer to Figure 7 , Figure 8 The mainboard assembly 400 is installed in the outer shaft cavity, specifically between the first end of the outer pedal shaft 100 and the first end of the inner pedal shaft 200. The second end of the inner pedal shaft 200 is aligned with the second end of the outer pedal shaft 100. The fastening part is specifically formed with an internal thread in the inner pedal shaft 200. The fastening part 500 is provided with an external thread. The fastening part 500 is detachably connected to the inner pedal shaft 200 through the external thread. Furthermore, the fastening part 500 is also provided with a fastening end, which abuts against the outside of the outer pedal shaft 100.

[0061] refer to Figure 9 , Figure 10 In some embodiments of this application, the battery assembly 300 includes a battery 310 and a battery cover 320. The battery cover 320 is a bendable sheet structure that covers the outer periphery of the battery 310 for installing and removing the battery 310.

[0062] The thickness of the battery cover 320 is 0.03mm to 0.5mm. In this embodiment, it is preferably made of 0.1mm thick stainless steel foil, which has good strength and corrosion resistance, and is easy to bend.

[0063] Replacing the traditional plastic battery compartment with a battery cover 320 saves significant radial space and reduces costs. Within the same overall dimensions, a larger capacity battery 310 can be accommodated, or the diameter of the pedal shaft 30 can be further reduced while maintaining the same battery capacity, improving ergonomics.

[0064] The battery cover 320 forms a three-dimensional cylindrical structure on the outer periphery of the battery 310, specifically including an end-side cover 321 and at least two peripheral cover portions 322 formed on the periphery of the end-side cover 321.

[0065] refer to Figure 11 In this embodiment, the peripheral covering portion 322 is configured as two parts, symmetrically distributed on the periphery of the battery 310.

[0066] An end-side covering portion 321 is provided at one end of the battery 310 near the motherboard assembly 400, and a peripheral covering portion 322 is wrapped around the periphery of the battery 310. The end of the peripheral covering portion 322 is formed with a handle portion 3221 extending to the other end of the battery 310 for applying force during disassembly.

[0067] By setting up a handheld part 3221, users can simply pull to remove the battery 310, simplifying the complex battery 310 removal and placement operation into a simple mechanical action, greatly improving the user experience.

[0068] An obstacle hole 323 is provided on the end-side covering part 321. The battery wire connected to the battery 310 passes through the obstacle hole 323 and is connected to the PCB board 430.

[0069] The PCB board 430 is connected to the battery 310, the strain sensor 201, and the lamp post 420. In some embodiments, the PCB board 430 is a plate-shaped structure extending along the axial direction of the step shaft 30. In order to facilitate its connection with the lamp post 420, in some embodiments, the PCB board 430 is also connected to the PCB adapter board 431. The PCB adapter board 431 is disposed on the side of the PCB board 430 close to the lamp post 420. The PCB adapter board 431 is perpendicular to the PCB board 430 to make the connection with the lamp post 420 more convenient and faster.

[0070] The bypass hole 323 is specifically designed for the battery wire routing, ensuring that the wires will not be pulled or damaged during the installation and removal of the battery 310, thus guaranteeing the long-term reliability of the electrical connection.

[0071] The assembly method for the 320 battery cover is as follows: Step 1: Pass the battery wire of battery 310 through the clearance hole 323 on the battery cover 320; Step 2: Attach the end-side covering part 321 of the battery cover 320 to the end of the battery 310 near the motherboard assembly 400; Step 3: Wrap the two peripheral covering parts 322 around the periphery of the battery 310 respectively, so that the battery covering strip 320 tightly wraps the battery 310; Step 4: Keep the handle 3221 in the position extending beyond the other end of the battery 310, or fold it to the end of the battery 310 as needed, refer to... Figure 9 .

[0072] After assembly, push the battery module 310, wrapped with the battery cover 320, into the inner shaft cavity of the inner pedal shaft 200, so that the battery 310 is located in the inner shaft cavity. Fold the handle 3221 near the tail of the battery 310, and then install the fastener 500 to fix and seal it.

[0073] After the battery 310 is installed, inject limiting adhesive into the first end opening of the outer foot shaft 100 to fix the position of the battery 310 and prevent the battery 310 from shifting.

[0074] The limiting adhesive only provides axial restraint and vibration absorption functions, without exerting a strong adhesive effect on the battery 310. The battery 310 is primarily secured by the battery cover tape 320 and the fastening part 500; the limiting adhesive only serves as an auxiliary restraint to prevent the battery 310 from shifting towards the first end. Therefore, the material selection and structural design of the limiting adhesive must meet the requirement of "restraint but not adhesion." Examples of suitable limiting adhesives include polyurethane micro-adhesive and silicone.

[0075] The cured limiting adhesive comes into contact with the end-side covering portion 321 of the battery cover 320 to form an axial limit, preventing the battery 310 from moving towards the first end during riding vibrations; however, since the adhesive force between the adhesive and the cover is extremely low, there is no need to overcome the adhesive force when disassembling, and the battery 310 can be easily removed from the other end.

[0076] During disassembly, first remove the fastener 500, unfold the folded handle 3221, and pull the handle 3221 to pull the battery 310 out of the inner shaft cavity. Then disconnect the connector between the battery wire and the PCB board 430 to complete the disassembly of the battery 310.

[0077] refer to Figure 12 In some other embodiments of this application, the battery cover 320 may also adopt a three-claw or four-claw cover, with the peripheral covering portion 322 designed as three or four evenly distributed covers, forming a three-claw or four-claw structure when wrapping the battery 310, which can apply the wrapping force more evenly and is suitable for batteries 310 with larger diameters.

[0078] In other embodiments, the two ends of the battery cover 320 can be pre-fixed by ultrasonic welding to form a cylindrical structure. During assembly, simply insert the battery 310 into the cylinder and then pass the battery wire through the clearance hole 323, making the operation even simpler.

[0079] In other embodiments, both the outer pedal axle 100 and the inner pedal axle 200 are made of high-strength aluminum alloy, which, after heat treatment, exhibits excellent mechanical properties and fatigue resistance. Aluminum alloy is lightweight and high-strength, making it suitable for bicycle components.

[0080] The lampshade end cap 410 is injection molded from high-strength engineering plastic, exhibiting excellent dimensional stability and weather resistance. The plastic material is easy to mold into complex shapes and possesses good insulation properties.

[0081] The battery cover 320 is made of 0.1mm thick stainless steel foil, which has good strength and corrosion resistance, and is also easy to bend. The stainless steel material has moderate elasticity, which can firmly wrap the battery 310 without damaging it due to excessive tightness.

[0082] The strain sensor 201 uses a metal foil strain gauge, which is attached to the outer surface of the inner pedal shaft 200 with a special adhesive.

[0083] The foot pedal assembly process is as follows: Step 1: Strain gauge bonding Fix the inner pedal shaft 200 onto a special fixture and clean its outer surface area. Using a high-precision patch mounting device, rigidly fix the strain sensor 201 to the outer surface of the inner pedal shaft 200 with a special adhesive. After bonding, perform curing treatment and quality inspection to ensure the accuracy of the bonding position and the bonding strength. Guide the lead wire of the strain sensor 201 into the inner cavity through the wire hole 230 on the inner pedal shaft 200 for later use.

[0084] Step 2: Assembly of inner and outer shafts Assemble the inner pedal shaft 200 with the strain gauges attached to it and the outer pedal shaft 100. Apply thread-locking adhesive to the connecting part of the inner pedal shaft 200, then screw the inner pedal shaft 200 into the corresponding threaded hole of the outer pedal shaft 100, apply a preset torque, and ensure a reliable connection. After assembly, perform a coaxiality test to ensure that the coaxiality of the inner and outer shafts meets the requirements.

[0085] Step 3: Assemble the motherboard components (400). Press the charging post into the corresponding hole on the lampshade end cap 410 and secure it using soldering or conductive adhesive. Fix the PCB board 430 onto the lampshade end cap 410 and make electrical connection with the charging post. At this point, the mainboard assembly 400 is complete.

[0086] Step 4: Assembly of Battery 310 Module Take the battery cover 320 and pass the battery cable of the battery 310 through the clearance hole 323. Attach the end-side covering portion 321 of the battery cover 320 to the end of the battery 310 near the mainboard assembly 400, and wrap the two peripheral covering portions 322 around the periphery of the battery 310, ensuring the battery cover 320 tightly wraps around the battery 310. Connect the battery cable to the power cable leading from the PCB board 430 via a pluggable connector. Push the wrapped battery 310 module into the inner shaft cavity of the inner foot pedal 200, positioning the battery 310 within the inner shaft cavity. Fold the handle portion 3221 near the tail of the battery 310.

[0087] Step 5: Assembly and Sealing Install the assembled mainboard assembly 400 onto the first end of the outer pedal shaft 100, so that the lampshade end cap 410 mates with the end of the outer pedal shaft 100, and use special adhesive to bond and seal it. Install sealing soft glue on the other end of the inner pedal shaft 200, and tighten the fastening part 500 to seal and fix it.

[0088] Step 6: Assembly Testing After assembly, functional and sealing tests are performed to ensure that the power meter works properly and is reliably sealed.

[0089] The cycling equipment involved in this application includes the pedals described in any of the above embodiments. The cycling equipment can be any device that needs to monitor cycling power, such as a bicycle, electric bicycle, exercise bike, or rehabilitation training bike.

[0090] Taking a road bicycle as an example, by installing the pedals of this application on the bicycle crank, the rider's pedaling power can be monitored in real time.

[0091] When a cyclist presses down on the pedal 10, the pedaling force is transmitted to the pedal axle 30. When the outer pedal axle 100 of the pedal axle 30 is subjected to force, the force is transmitted to the inner pedal axle 200 through the rigid connection between the inner and outer axles, causing a slight deformation in the inner pedal axle 200. A strain sensor 201, located on the outer surface of the inner pedal axle 200, detects this deformation and converts it into an electrical signal, which is transmitted to the PCB board 430 through a wiring harness within a wire hole 230. The PCB board 430 processes and calculates the signal to obtain real-time power data, which is then transmitted wirelessly to the control panel of the cycling equipment or the user's mobile terminal.

[0092] Meanwhile, the battery assembly 300 provides power to the entire system. When the battery 310 is depleted, it can be charged through the charging port 31. When the battery 310 reaches the end of its life, the user can remove the fastener 500 at the end of the inner pedal shaft 200 and pull the handle 3221 on the battery cover strap 320 to easily remove the old battery 310 and replace it with a new one, without the need for professional tools or skills.

[0093] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pedal for a cycling device, characterized in that, include: A pedal and a pedal axle, the pedal being connected to the pedal axle, the pedal axle comprising: The outer foot axle has an outer axle cavity formed inside it; An inner pedal shaft is coaxially disposed within the outer shaft cavity and rigidly connected to the outer pedal shaft. A strain sensor is disposed on the outer surface of the inner pedal shaft. Wherein, at least one mounting chamber is formed between the outer surface of the inner pedal shaft and the inner surface of the outer pedal shaft, and the strain sensor is located in the mounting chamber and connected to the outer surface of the inner pedal shaft.

2. The pedal for a cycling device according to claim 1, characterized in that, The strain sensor is fixed to the outer surface of the inner pedal shaft by an adhesive layer, so that the strain sensor is supported only by the outer surface of the inner pedal shaft.

3. The pedal for a cycling device according to claim 1, characterized in that, The inner pedal shaft has a first connecting part and a second connecting part at both ends, and the outer pedal shaft has a first mating part and a second mating part at the corresponding positions. The first connecting part is threaded or interference-fitted to the first mating part, and the second connecting part is threaded or interference-fitted to the second mating part. The strain sensor is disposed between the first connecting part and the second connecting part.

4. The pedal for a cycling device according to claim 1, characterized in that, The first end of the outer foot axle is detachably connected to a main board assembly, which includes a lampshade end cap, a lamp post, and a PCB board. The lampshade end cap is detachably connected to the outer foot axle, the lamp post is connected to the lampshade end cap, and the PCB board is connected to the lamp post. The lamp post and the PCB board extend into the outer axle cavity. The inner step shaft is provided with a wire hole, through which the wire harness of the strain sensor is connected to the PCB board.

5. The pedal for a cycling device according to claim 1, characterized in that, The inner pedal shaft has an inner shaft cavity, and at least one end of the inner shaft cavity near the main board assembly is connected to the outer shaft cavity. A battery assembly is disposed in the inner shaft cavity and is connected to the PCB board. The outer pedal shaft has a charging port connected to the battery assembly.

6. The pedal for a cycling device according to claim 4, characterized in that, The inner step shaft has an open structure at one end away from the main board assembly, and a fastening fitting part is provided on it, with a fastening part detachably connected thereto.

7. The pedal for a cycling device according to claim 5, characterized in that, The battery assembly includes a battery and a battery cover strip, which is a bendable sheet structure that covers the outer periphery of the battery for installing and removing the battery.

8. The pedal for a cycling device according to claim 7, characterized in that, The battery cover forms a three-dimensional cylindrical structure on the outer periphery of the battery. The battery cover includes an end-side covering portion and at least two peripheral covering portions formed on the periphery of the end-side covering portion. The end-side covering portion is disposed at one end of the battery, and the peripheral covering portions are disposed on the periphery of the battery. The end of the peripheral covering portion is formed with a handle portion extending to the other end of the battery for applying force during disassembly.

9. The pedal for a cycling device according to claim 8, characterized in that, The end-side covering portion is disposed on the side of the battery close to the motherboard assembly. An avoidance hole is provided on the end-side covering portion, and the battery wire connected to the battery passes through the avoidance hole and connects to the PCB board.

10. A cycling device, characterized in that, Includes the foot pedal as described in any one of claims 1-9 above.

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