A single-speed flywheel structure and a riding train

Abstract

This utility model discloses a single-speed flywheel structure and a riding train, including a flywheel assembly and a chain stop assembly. The flywheel assembly includes a flywheel body, a strain gauge, and a signal transmission component. The strain gauge and the signal transmission component are both connected to the flywheel body and are electrically connected. The chain stop assembly includes a chain stop housing and a signal collecting component disposed therein. The signal collecting component is electrically connected to the signal transmission component. The chain stop assembly is coaxially connected to the flywheel assembly and can rotate with the flywheel assembly. The purpose of this utility model is to provide a single-speed flywheel structure that can obtain the power value of the operator during movement through measurement, thereby improving the accuracy of power data.

Description

Technical Field

[0001] This utility model belongs to the field of cycling equipment technology, specifically, it relates to a single-speed flywheel structure and a cycling train. Background Technology

[0002] With the continued growth in cycling popularity in recent years, the business volume of indoor cycling trainers has also been increasing. Cycling users are becoming more professional and paying closer attention to the performance indicators of cycling trainers, especially power output and power accuracy, which have become the primary criteria for evaluating the quality of a cycling trainer. High-power-accuracy cycling trainers can provide users, especially professional athletes, with more precise training references.

[0003] Currently, most cycling trainer developments obtain power values ​​for users during exercise based on operating condition data and power curves simulated during testing. This method can only indirectly obtain simulated values, resulting in low power accuracy.

[0004] Therefore, developing a single-speed flywheel structure that can measure the power value during the operator's movement and improve the accuracy of power data is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of this invention is to provide a single-speed flywheel structure and a cycling trainer that can obtain the power value of the operator during the exercise process by measurement, thereby improving the accuracy of power data.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0007] This utility model proposes a single-speed flywheel structure, including:

[0008] A flywheel assembly includes a flywheel body, a strain gauge, and a signal transmission component. The strain gauge and the signal transmission component are both connected to the flywheel body, and the strain gauge and the signal transmission component are electrically connected.

[0009] A chain stop assembly includes a chain stop housing and a signal collecting component disposed therein; the signal collecting component is electrically connected to the signal transmitting component;

[0010] The chain stop assembly is coaxially connected to the flywheel assembly, and the chain stop assembly can rotate with the flywheel assembly.

[0011] In some embodiments of this application, the flywheel body is provided with a plurality of positioning holes, and the chain stop housing is provided with a plurality of positioning pins. The positions of the plurality of positioning holes and the plurality of positioning pins correspond to each other, and the plurality of positioning pins are respectively inserted into the plurality of positioning holes.

[0012] In some embodiments of this application, a through hole is provided on the chain stop housing, and the signal collection component is electrically connected to the signal transmission component through the through hole.

[0013] In some embodiments of this application, an annular boss is formed on the chain stop housing, the through hole is formed through the annular boss, and a plurality of positioning pins are disposed on the annular boss;

[0014] With the positioning pins inserted into the positioning holes, the annular boss abuts against the flywheel body, and the through hole corresponds to the position of the signal transmission component.

[0015] In some embodiments of this application, the signal collecting component is connected to the chain stop housing via fasteners.

[0016] In some embodiments of this application, the chain stop housing includes a first sub-chain stop housing and a second sub-chain stop housing. The first sub-chain stop housing has a plurality of first connecting holes, the second sub-chain stop housing has a plurality of second connecting holes, and the signal collection component has a plurality of third connecting holes.

[0017] With the first sub-chain stop housing and the second sub-chain stop housing fastened together, an installation cavity is formed. The signal collection component is installed in the installation cavity. The plurality of first connecting holes and the plurality of second connecting holes correspond to the positions of the plurality of third connecting holes. The plurality of fasteners pass through the plurality of first connecting holes, the plurality of third connecting holes, and the plurality of second connecting holes in sequence to connect the first sub-chain stop housing, the second sub-chain stop housing, and the signal collection component.

[0018] In some embodiments of this application, the flywheel body is provided with a mounting groove, and the strain gauge is installed in the mounting groove.

[0019] In some embodiments of this application, an auxiliary chain stop assembly is also included, wherein the auxiliary chain stop assembly and the chain stop assembly respectively abut against both sides of the flywheel assembly;

[0020] The auxiliary chain stop assembly includes an auxiliary chain stop body and an auxiliary annular boss formed thereon, the auxiliary annular boss abutting against the flywheel body.

[0021] In some embodiments of this application, an inner snap-fit ​​is formed within the flywheel body, the inner snap-fit ​​being used to engage with the base of the tower.

[0022] On the other hand, this application also relates to a cycling trainer, including the single-speed flywheel structure and chain described in any of the above claims, wherein the chain engages with the flywheel body, and the chain stop assembly is used to prevent the chain from falling off the flywheel assembly.

[0023] Compared with the prior art, the advantages and positive effects of this utility model are:

[0024] By incorporating strain gauges and signal transmission components on the flywheel body, the strain gauges collect stress and strain information from the flywheel body and transmit it to the signal transmission components. A signal collection component is installed within the chain stop housing. This component collects the signal transmitted by the signal transmission components, processes it, and obtains the real-time power. This real-time measurement and calculation method replaces the analog method used in existing technologies, improving the accuracy of power measurement. Furthermore, since the chain stop assembly is coaxially connected to the flywheel assembly, it can rotate with the flywheel assembly, further ensuring the stability of signal transmission between the signal collection and transmission components.

[0025] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is one of the overall structural schematic diagrams of an embodiment of the cycling train proposed in this utility model;

[0028] Figure 2 yes Figure 1 Sectional view along the middle AA direction;

[0029] Figure 3 yes Figure 2 A partial schematic diagram at point B in the middle;

[0030] Figure 4 This is the second schematic diagram of the overall structure of one embodiment of the cycling train proposed in this utility model;

[0031] Figure 5This is a schematic diagram illustrating the use of a single-speed flywheel structure proposed in this utility model;

[0032] Figure 6 yes Figure 5 Exploded view;

[0033] Figure 7 This is an exploded view of a chain stop assembly with a single-speed flywheel structure proposed in this utility model;

[0034] Figure 8 This is a schematic diagram of the structure of the first sub-chain stop housing of a chain stop assembly with a single-speed flywheel structure proposed in this utility model;

[0035] In the picture,

[0036] 100. Flywheel assembly;

[0037] 110. Flywheel body;

[0038] 111. Mounting slot;

[0039] 112. Positioning hole;

[0040] 113. Internal buckle;

[0041] 120. Signal transmission components;

[0042] 200. Chain stop assembly;

[0043] 210. Chain stop housing;

[0044] 211. Positioning post;

[0045] 212. Through hole;

[0046] 213. Annular boss;

[0047] 214. First sub-chain stop housing;

[0048] 2141. First connecting hole;

[0049] 215. Second sub-chain stop housing;

[0050] 2151, Second connecting hole;

[0051] 216. Installation cavity;

[0052] 217. Fasteners;

[0053] 220. Signal collection components;

[0054] 221. Third connecting hole;

[0055] 300. Chain;

[0056] 400. Tower base;

[0057] 500. Auxiliary chain stop assembly;

[0058] 510. Auxiliary chain stop body;

[0059] 520. Auxiliary annular boss. Detailed Implementation

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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" 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.

[0065] The following disclosure provides many different embodiments or examples for implementing various structures of the present 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 scope of the invention. Furthermore, reference numerals and / or reference 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.

[0066] In some embodiments of this application, such as Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, a single-speed flywheel structure is disclosed, including a flywheel assembly 100 and a chain stop assembly 200.

[0067] The flywheel assembly 100 is used to engage with the chain.

[0068] like Figure 3 , Figure 5 , Figure 6 As shown, the chain stop assembly 200 is disposed on one side of the flywheel assembly 100.

[0069] The flywheel assembly 100 includes a flywheel body 110, a strain gauge, and a signal transmission component 120. Both the strain gauge and the signal transmission component 120 are connected to the flywheel body 110, and the strain gauge and the signal transmission component 120 are electrically connected.

[0070] The chain stop assembly 200 includes a chain stop housing 210 and a signal collection component 220 disposed therein; the signal collection component 220 is electrically connected to the signal transmission component 120.

[0071] The chain stop assembly 200 is coaxially connected to the flywheel assembly 100, and the chain stop assembly 200 can rotate with the flywheel assembly 100.

[0072] The strain gauge is connected to the flywheel body 110. The strain gauge deforms under the force as the flywheel body 110 rotates, and the deformation is converted into a measurable electrical signal.

[0073] Specifically, a mounting groove 111 is formed on the flywheel body 110, and the strain gauge is installed in the mounting groove 111.

[0074] The strain gauge is attached to the mounting groove 111 of the flywheel body 110, and then sealed with glue to prevent corrosion from sweat and rainwater.

[0075] The signal transmission component 120 can use a Pogo pin connector. When the strain gauge is subjected to force and deforms, it generates an electrical signal, which is transmitted by the Pogo pin connector.

[0076] In order to limit the relative position between the flywheel assembly 100 and the chain stop assembly 200, such as Figure 8 As shown, several positioning holes 112 are provided on the flywheel body 110. For example... Figure 2 , Figure 3 As shown, the chain stop housing 210 is provided with a plurality of positioning pins 211. A plurality of positioning holes 112 correspond to the positions of the plurality of positioning pins 211 respectively. The plurality of positioning pins 211 are inserted into the plurality of positioning holes 112 respectively. This realizes the positioning and installation between the flywheel body 110 and the chain stop housing 210.

[0077] Specifically, the flywheel body 110 has two positioning holes 112. The two positioning holes 112 are symmetrically arranged on the flywheel body 110 with respect to the center along the radial direction of the flywheel body 110. The two positioning holes 112 are located on the same diameter circumference.

[0078] Correspondingly, there are also two positioning pins 211. The two positioning pins 211 are positioned on the chain stop housing 210, corresponding to the positions of the two positioning holes 112.

[0079] To enable electrical connection between the signal transmission component 120 and the signal collection component 220, a through hole 212 is provided on the chain stop housing 210. The signal collection component 220 extends into the through hole 212 and is electrically connected to the signal transmission component 120.

[0080] like Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, an annular boss 213 is formed on the chain stop housing 210, and a through hole 212 is opened on the annular boss 213, passing through the annular boss 213 and the chain stop housing 210.

[0081] like Figure 7As shown, the chain stop housing 210 includes a first sub-chain stop housing 214 and a second sub-chain stop housing 215. The first sub-chain stop housing 214 and the second sub-chain stop housing 215 are fastened together, and a mounting cavity 216 is formed between the first sub-chain stop housing 214 and the second sub-chain stop housing 215. The signal collection component 220 is installed in the mounting cavity 216.

[0082] like Figure 7 As shown, the signal collection component 220 installed in the mounting cavity 216 is electrically connected to the signal transmission component 120 through the through hole 212.

[0083] Specifically, the signal collection component 220 may be a circuit board. The circuit board adopts a sealed design to protect it and prevent sweat and rainwater from entering the plastic parts and corroding the circuitry.

[0084] Several positioning posts 211 are also provided on the annular boss 213. With the positioning posts 211 inserted into the positioning holes 112 respectively, the annular boss 213 abuts against the flywheel body 110. The through hole 212 corresponds to the position of the signal transmission component 120, playing a positioning role and avoiding signal transmission failure due to misalignment between the through hole 212 and the signal transmission component 120, thus ensuring the sustainability of signal transmission.

[0085] like Figure 6 As shown, the flywheel assembly 100 and the chain stop assembly 200 are both used to be mounted on the freehub base 400. Since the annular boss 213 abuts against the flywheel body 110, it can limit the axial relative position between the annular boss 213 and the flywheel body 110.

[0086] Specifically, the width of the annular boss 213 is the axial distance between the flywheel assembly 100 and the chain stop assembly 200. By designing the width of the annular boss 213 to be smaller than the width of the flywheel body 110, the chain 300 can be prevented from falling off from the flywheel body 110 toward the chain stop assembly 200.

[0087] To enable the signal collection component 220 to be installed within the chain stop housing 210, fasteners 217 can be used for connection. Multiple first connection holes 2141 are provided on the first sub-chain stop housing 214, multiple second connection holes 2151 are provided on the second sub-chain stop housing 215, and multiple third connection holes 221 are provided on the signal collection component 220.

[0088] like Figure 7As shown, when the first sub-chain stop housing 214 and the second sub-chain stop housing 215 are engaged, the multiple first connecting holes 2141 and the multiple second connecting holes 2151 correspond to the positions of the multiple third connecting holes 221, and the multiple fasteners 217 pass through the multiple first connecting holes 2141, the multiple third connecting holes 221, and the multiple second connecting holes 2151 in sequence to connect the first sub-chain stop housing 214, the second sub-chain stop housing 215, and the signal collection component 220.

[0089] In some embodiments of this application, such as Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, it also includes an auxiliary chain stop assembly 500. The auxiliary chain stop assembly 500 and the chain stop assembly 200 are respectively disposed on both sides of the flywheel assembly 100.

[0090] The auxiliary chain stop assembly 500, chain stop assembly 200 and freewheel assembly 100 are all mounted on the outside of the freewheel base 400 and abut against it from both sides of the freewheel assembly 100.

[0091] The auxiliary chain stop assembly 500 includes an auxiliary chain stop body 510 and an auxiliary annular boss 520 formed thereon, the auxiliary annular boss 520 abutting against the flywheel body 110.

[0092] The auxiliary chain stop assembly 500 and the chain stop assembly 200 are respectively positioned on both sides of the flywheel assembly 100.

[0093] An inner buckle 113 is formed inside the flywheel body 110, which is used to cooperate with the freewheel base 400.

[0094] In other embodiments of this application, such as Figure 4 As shown, a cycling trainer is disclosed, comprising the aforementioned single-speed freewheel structure and a chain 300. The chain 300 engages with the freewheel body 110.

[0095] The chain stop assembly 200 is used to stop the chain from falling off one side of the flywheel assembly 100.

[0096] The auxiliary chain stop assembly 500 is used to stop the chain from falling off from the other side of the flywheel assembly 100.

[0097] The distances between the chain stop assembly 200 and the auxiliary chain stop assembly 500 and the flywheel assembly 100 are both less than the thickness of the chain 300, thereby preventing the chain from falling off from both sides of the flywheel assembly 100.

[0098] In some embodiments of this application, the chain stop assembly 200 and the auxiliary chain stop assembly 500 are respectively disposed on both sides of the flywheel assembly 100, and their positions can be interchanged.

[0099] In some embodiments of this application, strain gauges and signal transmission components 120 are arranged on the flywheel body 110, which can transmit the stress and strain information after being subjected to force to the circuit board, and obtain the power value and speed value information during riding through circuit processing and calculation.

[0100] The chain stop assembly 200 and the auxiliary chain stop assembly 500 have the same function, both used for chain guidance and limiting. To facilitate positioning with the flywheel assembly 100, a positioning post 211 is designed on the first sub-chain stop housing 214 of the auxiliary chain stop assembly 200, and a corresponding positioning hole 112 is designed on the flywheel body 110. This design ensures a firm connection between the flywheel assembly 100 and the chain stop assembly 200, preventing misalignment during rotation, thus ensuring that the signal transmission component 120 and the signal collection component 220 are always connected and that signal disconnection does not occur. To ensure the signal collection component 220 is securely fixed and waterproof, the chain stop assembly 200 uses fasteners 217 and potting compound to seal and fix the circuit board, preventing sweat and rainwater from entering and corroding the circuit board, thus preventing functional failure.

[0101] The base 400 is a common structure in cycling trainers. It is used to mount all the components of the flywheel assembly 100 and connects to the cycling trainer to achieve the purpose of rotating the bicycle and driving the cycling trainer to rotate.

[0102] In practice, the chain 300 applies force to almost only half of the flywheel body 110. The strain varies significantly at different locations on the flywheel body 110, resulting in significantly different changes in the electrical signal generated by the strain gauge. Based on this characteristic, it can be known that when the chain drives the flywheel body 110 to rotate one revolution, the strain gauge will generate a periodic signal. Setting the electrical signal threshold to θ, a count is performed when the maximum current Imax - minimum current Imin ≥ θ. This allows us to obtain the number of revolutions N of the flywheel within a unit time t, and further calculate the rotational speed n of the flywheel body in rpm. The calculation formula is as follows:

[0103] ;

[0104] Based on the principle of strain gauges, the formula for measuring torque T using strain gauges is:

[0105] ;

[0106] Where J is the moment of inertia of the single-speed flywheel, G is the material shear modulus, r is the distance from the strain gauge attachment position to the center of the flywheel, and ε is the principal strain, which is output by the strain gauge.

[0107] After obtaining the torque and speed parameters, the corresponding power P is:

[0108] ;

[0109] Strain gauges can be bonded using single-strain bonding, half-bridge bonding, or full-bridge bonding methods, depending on the required accuracy.

[0110] The entire system is battery powered. When the strain gauge generates an electrical signal, it is transmitted to the circuit board via a Pogopin connector. The circuit board has signal acquisition, filtering, amplification, processing, and transmission functions. It converts the electrical signal generated by the strain gauge into a power signal and outputs it to the user, allowing the user to obtain power and speed data while riding. This enables the measurement of the operator's power during movement, improving the accuracy of power data.

[0111] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0112] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0113] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A single speed flywheel structure, characterized by, include: A flywheel assembly includes a flywheel body, a strain gauge, and a signal transmission component. The strain gauge and the signal transmission component are both connected to the flywheel body, and the strain gauge and the signal transmission component are electrically connected. A chain stop assembly includes a chain stop housing and a signal collecting component disposed therein; the signal collecting component is electrically connected to the signal transmitting component; The chain stop assembly is coaxially connected to the flywheel assembly, and the chain stop assembly can rotate with the flywheel assembly.

2. The single-speed flywheel structure according to claim 1, characterized in that, The flywheel body has several positioning holes, and the chain stop housing has several positioning pins. The positions of the several positioning holes and the several positioning pins correspond to each other, and the several positioning pins are inserted into the several positioning holes respectively.

3. The single-speed flywheel structure according to claim 2, characterized in that, A through hole is provided on the chain stop housing, and the signal collection component is electrically connected to the signal transmission component through the through hole.

4. The single-speed flywheel structure according to claim 3, characterized in that, An annular boss is formed on the chain stop housing, the through hole is opened through the annular boss, and a plurality of positioning pins are arranged on the annular boss. With the positioning pins inserted into the positioning holes, the annular boss abuts against the flywheel body, and the through hole corresponds to the position of the signal transmission component.

5. The single-speed flywheel structure according to claim 4, characterized in that... The signal collection component is connected to the chain stop housing via fasteners.

6. The single-speed flywheel structure according to claim 5, characterized in that, The chain stop housing includes a first sub-chain stop housing and a second sub-chain stop housing. The first sub-chain stop housing has a plurality of first connecting holes, the second sub-chain stop housing has a plurality of second connecting holes, and the signal collection component has a plurality of third connecting holes. With the first sub-chain stop housing and the second sub-chain stop housing fastened together, an installation cavity is formed. The signal collection component is installed in the installation cavity. The plurality of first connecting holes and the plurality of second connecting holes correspond to the positions of the plurality of third connecting holes. The plurality of fasteners pass through the plurality of first connecting holes, the plurality of third connecting holes, and the plurality of second connecting holes in sequence to connect the first sub-chain stop housing, the second sub-chain stop housing, and the signal collection component.

7. The single-speed flywheel structure according to claim 1, characterized in that, The flywheel body has a mounting groove, and the strain gauge is installed in the mounting groove.

8. The single-speed flywheel structure according to claim 1, characterized in that, It also includes an auxiliary chain stop assembly, which abuts against both sides of the flywheel assembly, the auxiliary chain stop assembly and the chain stop assembly respectively; The auxiliary chain stop assembly includes an auxiliary chain stop body and an auxiliary annular boss formed thereon, the auxiliary annular boss abutting against the flywheel body.

9. The single speed flywheel assembly as claimed in claim 1, wherein, said flywheel body is formed with an inner snap for mating with a tower base.

10. A riding platform, characterized by including the single speed flywheel assembly as claimed in any one of the preceding claims 1 to 9 and a chain engaged with said flywheel body, said chain stop assembly for stopping said chain from falling off said flywheel assembly.

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