Hollow integrated crankset crank sensor device and bicycle

Abstract

The utility model discloses a hollow integrated crankset crank sensor device and a bicycle. The hollow integrated crankset crank sensor device comprises a shaft and roller integrated crankset crank assembly, a sensor primary assembly, a right bowl assembly, a left bowl assembly, a left crank and at least one first deformation sensor. Through the unique assembly design, the first deformation sensor is arranged at the special angle position of the outer diameter of the shaft roller relative to the crank assembly direction, and the size is small. And the crankset crank does not change the original structure and is universal, so that the after-sale difficulty and the assembly complexity are reduced. And the assembling direction of the crank is indicated by setting the crank assembling identifier, so that the consistency of the torque sensor can be improved, and the sensing accuracy of the torque sensor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bicycle, concretely relates to a hollow integrated toothed disc crank sensor device and bicycle. BACKGROUND

[0002] In the field of bicycle, people's requirements for short-distance intelligent travel or large health intelligent cycling movement are higher and higher, and torque sensing in the cycling process has become necessary, but it is difficult for the prior art to integrate the torque sensor into the conventional five-hole size hollow integrated toothed disc crank (the shaft stick, toothed disc and right crank are integrated structure, which is the most commonly used high-end integrated toothed disc crank accessory of high-end bicycle), because the conventional five-hole size is British standard (BSA, thread outer diameter 34.798, tooth pitch 1.37*24TPI), which is the most common five-hole size specification, the outer diameter of the shaft stick of the high-end hollow integrated toothed disc crank is greater than or equal to 24mm, so that the minimum size of the frame five-hole is not more than 34, so that the size of the sensor on one side is less than 5mm, and there is a signal line, so it is almost impossible. This is a pain point that has existed in the intelligent development of electric bicycle torque sensor. SUMMARY

[0003] The main purpose of the utility model is to provide a hollow integrated toothed disc crank sensor device and bicycle with torque sensing function, so as to solve the problem that the torque sensor cannot be integrated into the hollow integrated toothed disc crank in the prior art.

[0004] To achieve the above purpose, the utility model provides a hollow integrated toothed disc crank sensor device, which comprises: the hollow integrated toothed disc crank sensor device comprises a shaft stick integrated toothed disc crank assembly, a sensor primary assembly, a right bowl component assembly, a left bowl component assembly, a left crank and at least one first deformation sensor;

[0005] The shaft stick integrated toothed disc crank assembly comprises a shaft stick, a toothed disc, a right crank, a secondary control circuit unit;

[0006] The secondary control circuit unit comprises a secondary data processing circuit and a secondary coil and is arranged outside the shaft stick; the first deformation sensor and the secondary coil are electrically connected with the secondary data processing circuit; the first deformation sensor is arranged on the outer surface of the shaft stick;

[0007] The sensor primary assembly comprises a primary data processing circuit fixed shell and a primary control circuit unit; the primary control circuit unit comprises a primary data processing circuit, a primary coil and a signal line, and the primary data processing circuit is electrically connected with the primary coil and the signal line;

[0008] The secondary data processing circuit and the primary data processing circuit transmit signals wirelessly. The primary data processing circuit provides power to the secondary data processing circuit wirelessly through a primary coil and a secondary coil.

[0009] Using the end face of the shaft as a reference plane, the line connecting the center point of the crank shaft mounting hole and the center point of the foot pedal mounting hole and extending therefrom is used as a reference line. The line connecting the center point of the patch surface of the first deformation sensor and the center point of the end face of the shaft is used as a first connecting line. The first connecting line is parallel to, perpendicular to, or at an angle to the reference line.

[0010] Optionally, the angle between the first connecting line and the baseline is 0°, 30°, 45°, 60°, 90°, 135°, 180°, 225°, 270°, or 315°.

[0011] Optionally, the axle roller is provided with a crank assembly mark, which is used to indicate the assembly direction of the crank; the assembly direction of the crank is the direction in which the crank axle roller mounting hole points to the foot pedal mounting hole.

[0012] Optionally, the hollow integrated crankshaft sensor device further includes at least one second deformation sensor, wherein the line connecting the center point of the patch surface of the second deformation sensor and the center point of the end face of the shaft is a second connecting line, and the angle between the second connecting line and the reference line is 0°, 45°, 90°, 135°, 180°, 225°, 270°, or 315°.

[0013] Optionally, a left bearing is provided in the left cup assembly, and a right bearing is provided in the right cup assembly. After the left cup assembly and the right cup assembly are assembled into the vehicle, they are located at both ends of the axle roller, and the first deformation sensor and / or the second deformation sensor are located between the left bearing and the right bearing of the axle roller.

[0014] Optionally, the number of the first deformation sensors is two, and the two first deformation sensors are symmetrically arranged relative to the axis.

[0015] Optionally, the outer surface of the shaft is provided with a mounting plane for mounting the first deformation sensor.

[0016] Optionally, the primary data processing circuit and the secondary data processing circuit are each electrically connected to a secondary coil, and the secondary data processing circuit transmits torque signals to the primary data processing circuit wirelessly through the secondary coil.

[0017] Optionally, the secondary control circuit unit includes an infrared emitting element, and the primary control circuit unit includes an infrared receiving element. The infrared emitting element is electrically connected to the secondary data processing circuit, and the infrared receiving element is electrically connected to the primary data processing circuit. The secondary data processing circuit transmits a torque signal to the primary data processing circuit in an infrared manner through the infrared emitting element and the infrared receiving element.

[0018] Optionally, the integrated crankshaft assembly further includes a secondary protective sleeve with an adjustable diameter, which is opened to increase its inner diameter and fits over the shaft; and the secondary protective sleeve and the outer surface of the shaft form a mounting cavity, in which the secondary data processing circuit, the secondary coil, and the first deformation sensor are located.

[0019] Optionally, the primary component of the sensor further includes a primary protective sleeve that covers the primary data processing circuit and the primary coil.

[0020] Optionally, the hollow integrated crankshaft sensor device further includes a shielding plate disposed between the shaft and the secondary coil.

[0021] Optionally, the right cup assembly includes a right cup, a dust cover, and a right bearing. The inner hole of the right cup is provided with a right cup shell step and an anti-rotation groove. The outer diameter of the right side of the sensor primary assembly is provided with a second groove, an anti-rotation rib, and a limiting step. The right O-ring is disposed in the second groove. The right end of the sensor primary assembly is assembled into the right cup. The right O-ring is placed on the right side of the right cup shell step. The limiting step abuts against the left end of the right cup. The anti-rotation rib of the outer diameter of the right side of the sensor primary assembly is engaged in the anti-rotation groove inside the right cup.

[0022] Optionally, a disassembly hole is provided on the left inner wall of the sensor primary assembly for disassembling the sensor primary assembly.

[0023] Optionally, it also includes a speed sensor, which includes a speed sensing element and a speed sensing element, the speed sensing element being a ferromagnetic element; the speed sensing element is contained within a primary sensor assembly and is electrically connected to a primary data processing circuit; the speed sensing element is fixed to the outer surface of the shaft roller, and the speed sensing element is part of the shaft roller integrated crank assembly.

[0024] Optionally, the speed sensing element is two semi-circular magnetic rings uniformly filled with a number of N / S magnetic poles; the semi-circular magnetic rings are fitted into magnetic ring mounting grooves fixed on the surface of the shaft.

[0025] Optionally, the primary data processing circuit housing includes a right half-shell and a left half-shell; the primary data processing circuit is fixedly connected to the left half-shell, and the primary coil is fixedly connected to the right half-shell.

[0026] Optionally, a hollow signal line soldering groove is provided on the left half shell; the primary data processing circuit is sleeved on the inner wall of the left half shell, and the signal connection pads are correspondingly set with the signal line soldering groove.

[0027] A bicycle comprising a hollow integrated chainring and crank sensor device as described above.

[0028] In this invention, a first deformation sensor is fixedly connected to the shaft roller. The first deformation sensor senses the torque of the left and right cranks by sensing the bending force, shear force, or resultant force of the shaft roller. This solution, through a unique assembly design, places the first deformation sensor at a specific angular position relative to the crank assembly direction on the outer diameter of the shaft roller. This results in a small size, maintains the original structure of the crankset without altering its shape, and is universally applicable, reducing after-sales difficulty and assembly complexity. Furthermore, by setting a crank assembly mark to indicate the crank assembly direction, the consistency of the torque sensor can be improved, thereby enhancing the sensing accuracy of the torque sensor. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a hollow integrated crankshaft sensor device according to one embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the finished product of a hollow integrated crankshaft sensor device according to one embodiment of this application;

[0032] Figure 3 This is a schematic diagram of a crank assembly 1 with an integrated shaft and crankshaft of a hollow integrated crank sensor device according to an embodiment of this application;

[0033] Figure 4 This is another unfolded schematic diagram of a partial structure of the hollow integrated crankshaft sensor device in one embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the shaft and crank assembly of a hollow integrated crank sensor device according to one embodiment of this application.

[0035] Figure 6 This is a schematic diagram of the shaft and roller structure of a hollow integrated crankshaft sensor device in one embodiment of this application;

[0036] Figure 7 This is a schematic diagram illustrating the positional relationship between the first connecting line and the baseline of a hollow integrated crankshaft sensor device in one embodiment of this application.

[0037] Figure 8 This is an exploded view of a hollow integrated crankshaft sensor device according to one embodiment of this application;

[0038] Figure 9 This is an exploded schematic diagram of the primary sensor component 2 of a hollow integrated crankshaft sensor device in one embodiment of this application;

[0039] Figure 10 This is a schematic diagram from one perspective of the sensor primary data processing circuit fixing housing 18 of a hollow integrated crankshaft sensor device according to an embodiment of this application.

[0040] Figure 11 Another schematic diagram of the sensor primary data processing circuit fixing housing 18 of a hollow integrated crankshaft sensor device in one embodiment of this application;

[0041] Figure 12 This is an exploded view of the integrated crankshaft assembly 1 of the hollow integrated crankshaft sensor device in one embodiment of this application.

[0042] Figure 13 This is a cross-sectional schematic diagram of a hollow integrated crankshaft sensor device according to an embodiment of this application;

[0043] Figure 14 This is a schematic diagram of the primary data processing circuit of a hollow integrated crankshaft sensor device according to an embodiment of this application.

[0044] Figure 15 This is a force diagram of the first deformation sensor of the hollow integrated crankshaft sensor device in one embodiment of this application;

[0045] Figure 16 This is a schematic diagram showing the positions of the first deformation sensor and the second deformation sensor on the shaft roller surface of a hollow integrated crankshaft sensor device in one embodiment of this application.

[0046] Figure 17 This is a schematic diagram of the assembly of the first deformation sensor and the shaft roller of a hollow integrated crankshaft sensor device in one embodiment of this application.

[0047] Figure 18 This is a schematic diagram of the left cup assembly of a hollow integrated crankshaft sensor device in one embodiment of this application;

[0048] Figure 19 This is a schematic diagram of the right cup assembly of a hollow integrated crankshaft sensor device in one embodiment of this application.

[0049] Explanation of icon numbers:

[0050]

[0051]

[0052] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0054] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0055] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0058] For ease of description, features representing space, such as slots, holes, and cavities, are labeled with arrowed leader lines in the accompanying drawings, while solid structural features are labeled with un-arrowed leader lines in the accompanying drawings.

[0059] To better illustrate the technical solution of this application, it is necessary to describe the bicycle bottom bracket and chainring crank. After more than 100 years of development, bicycle components are now highly refined and mature, especially the bottom bracket (BB) and chainring crank. Mid-to-low-end models primarily use JIS square-structure BB bottom brackets (16mm or 17mm outer diameter) and chainring cranks, while most mid-to-high-end models opt for hollow integrated chainring crank sensor devices (24mm outer diameter). The most common combination for these two bottom bracket structures is a BSA bottom bracket (approximately 34mm inner diameter), or, for higher-end models, a larger diameter aluminum alloy bottom bracket (approximately 30mm in diameter, in which case the bottom bracket thread is typically M47, and the bottom bracket diameter is even larger—47mm). Of the above bottom bracket structures, only the JIS square BB bottom bracket achieves torque integration in the electric bicycle field. Due to the limitations of the BSA standard bottom bracket size and the size and structure of the hollow integrated crankset sensor device, there is no technical solution for the hollow integrated crankset sensor device or BB bottom bracket that can integrate the torque sensor without changing the overall structure of the original bicycle components. This hinders the intelligent development of electric bicycles.

[0060] Existing torque sensor technologies are all designed for standard JIS standard BB bottom brackets (where the bottom bracket axle and right chainring crank are separate components, a common design with square ends on the axle). However, a dual-sided torque sensor solution has been lacking in the more conventional high-end hollow-axle integrated chainring crank structure used in bicycles. This has plagued the e-bike industry for many years, primarily due to: 1. Achieving dual-sided torque requires adding a metal sensing sleeve to the outside of the axle using conventional methods; 2. The axle outer diameter of the hollow integrated chainring crank sensor device is 24mm, which is too large; 3. The bottom bracket of a standard frame is a British BSA structure with a maximum inner diameter of approximately 34mm, significantly limiting its size. These three technical challenges prevent the integration of dual-sided torque sensors within this structural dimension (hollow integrated chainring crank sensor device).

[0061] This patent focuses on solving the problem of integrating a high-end hollow integrated crankset sensor device with the frame bottom bracket sleeve under the existing conventional bottom bracket size conditions, effectively solving the long-standing problem of high-end bicycle component structure in the electric bicycle field.

[0062] To address the aforementioned problems, this utility model provides a method that integrates a torque sensor onto the shaft and bottom bracket sleeve of a hollow integrated chainring crank sensor device, based on the existing hollow integrated chainring crank sensor device for bicycles. The bottom bracket sleeve corresponds to the primary data processing circuit fixing housing 18 of this application.

[0063] Specifically, please refer to Figure 1 , Figure 1 This is a schematic diagram of the assembly structure of the hollow integrated crankshaft sensor device and torque sensor device. It is a schematic diagram of the assembly of the crankshaft assembly 1, the primary sensor assembly 2, the right cup assembly 3, the left cup assembly 4, and the left crank 5, which is also the structure after assembly into the whole vehicle.

[0064] The integrated crankset assembly 1 also includes a shaft 10, a chainring 8, and a right crank 9. The shaft 10, chainring 8, and right crank 9 are integrally fixedly connected as a module. This integral fixed connection can be a one-piece molded structure or it can be fixed together as a whole by means of screw locking, tight-fitting toothed connection, etc. The primary sensor assembly 2 is disposed between the left cup assembly 4 and the right cup assembly 3, and is sleeved on the shaft 10 of the integrated crankset assembly 1. A first deformation sensor 11 is disposed on the outer surface of the shaft 10. The first deformation sensor 11 can be fixedly connected to the shaft 10, for example, using adhesive.

[0065] Please see Figure 2 , Figure 2 This is a schematic diagram of the finished product of the hollow integrated crankshaft sensor device and torque sensor device. It shows the integrated crankshaft assembly 1, sensor primary assembly 2, right cup assembly 3, left cup assembly 4, and left crank 5, and also presents the various module components to the customer.

[0066] Please see Figure 3 , Figure 3 This is another unfolded schematic diagram of the finished product of the hollow integrated crankshaft sensor device and torque sensor device. It combines the primary sensor component 2, the right cup component 3, and the left cup component 4 into the frame axle sleeve structure, which is also the usual assembly method. Then, it is combined with the integrated crankshaft component 1 and the left crank 5 to form an integral structure.

[0067] like Figure 5 As shown, in this embodiment, one end of the shaft roller 10 is provided with a crank assembly mark 106, and the shaft roller assembly hole of the crank is provided with a corresponding shaft roller assembly mark 107, corresponding to... Figure 4 , Figure 5 and Figure 6The crank assembly mark 106 is used to indicate the assembly direction of the cranks (including the left crank 5 and the right crank 9). The crank assembly mark 106 and the shaft assembly mark 107 are structurally designed, using special structures at both ends of the shaft to ensure the consistency of the crank assembly direction with the angle of the first deformation sensor 11 at the axle 10's attachment position. This also facilitates consistent signal sensing; for example, the right foot pedal torque signal increases positively, while the left foot pedal torque decreases, thus adding another signal sensing element—distinguishing between left and right foot signals. According to one embodiment of this application, this special structure involves removing at least one tooth from the circumferentially arranged teeth at both ends of the shaft, forming a curved surface extending axially along the shaft 10. This processing technology is a mature existing process. The crank assembly mark 106 can also be an arrow or other forms, such as dots or lines, to indicate the installation method. The crank assembly mark 106 is preferably arranged symmetrically in the circumferential direction of the shaft, such as... Figure 7 As shown, there are usually two crank markings 106 at each end of the shaft roller, and the two crank assembly markings 106 at one end are symmetrically arranged with respect to the shaft roller axis.

[0068] Specifically, the shaft roller 10 may also have a crank assembly mark 106 at one end, indicating the assembly direction of one crank (e.g., left crank 5), and the other crank (right crank 9) is in the opposite direction to the crank (left crank 5). In this way, the two cranks are aligned 180° apart.

[0069] Please see Figures 4-7 This is a schematic diagram of the assembly angle direction of the crank and the axle according to an embodiment of this application. The crank's axle assembly hole 303 is a circular hole with internal teeth, and also has axle assembly mark 107 structure corresponding to the crank assembly mark 106 structure at both ends of the axle. The line connecting the center point of the crank's axle assembly hole 303 and the center point of the pedal hole 304 extends to both ends and is called the crank direction extension line, i.e. Figure 7 The middle dashed line.

[0070] See Figures 6-11 This application sets up a primary control circuit unit and a secondary control circuit unit to transmit electrical energy and electrical signals.

[0071] Combination Figure 9 The primary control circuit unit includes a primary data processing circuit 12, a primary coil 17, and a signal line 26. The primary data processing circuit 12 is electrically connected to the primary coil 17 and the signal line 26.

[0072] The primary control circuit unit includes a primary data processing circuit 12 and a primary coil 17. The primary data processing circuit 12 is electrically connected to the primary coil 17, and both the primary data processing circuit 12 and the primary coil 17 are fixedly connected to the primary data processing circuit mounting housing 18. The primary data processing circuit 12 can be a flexible circuit board, and it can be fixedly connected to the primary data processing circuit mounting housing 18 with adhesive, thereby securing the primary data processing circuit 12. The primary data processing circuit 12 provides power to the secondary data processing circuit 13 wirelessly through the primary coil 17 and the secondary coil 16.

[0073] See Figures 8-12 The primary control circuit unit of this application is disposed within the primary data processing circuit mounting housing 18. The primary data processing circuit mounting housing 18 includes a right half-shell 1802 and a left half-shell 1801, which are fixedly connected. Specifically, the right half-shell 1802 and the left half-shell 1801 can be fixedly connected by a tight fit or glue. The primary data processing circuit 12 is fixedly connected to the left half-shell 1801, and the primary coil 17 is fixedly connected to the right half-shell 1802 to realize the installation and fixation of the primary data processing circuit 12 and the primary coil 17. Then, the mounting part 1808 of the right half-shell 1802, which fixes the primary coil 17, is installed into the mounting hole 1810 of the left half-shell 1801, which has fixed the primary data processing circuit 12 and the signal line 26. A hollow signal line soldering groove 1804 is provided on the left half-shell 1801. The primary data processing circuit 12 is housed on the inner wall of the left half-shell 1801, and the signal connection pads of the primary data processing circuit 12 are correspondingly arranged with the signal line soldering groove 1804. Thus, the primary coil 17 and the pads on the primary data processing circuit 12 can be easily electrically connected through the signal line soldering groove 1804. Similarly, one end of the signal line 26 can also be easily electrically connected to the pads on the primary data processing circuit 12 through the signal line soldering groove 1804. Those skilled in the art will understand that the electrical connection can be formed by soldering, crimping, or using connectors, etc., to achieve the transmission of electrical signals.

[0074] After installation, the cable outlet slot 1811 of the right half shell 1802 and the left half shell 1801 form a cable outlet hole. The signal line 26 is led out from the cable outlet hole. Finally, the extra space between the right half shell 1802 and the left half shell 1801 can be filled with sealant to achieve sealing and waterproofing of the primary data processing circuit 12, and also improve the shock absorption performance of the primary control circuit unit.

[0075] An anti-rotation rib 1806 and a limiting step 1805 are also provided on the right half shell 1802. The anti-rotation rib 1806 engages with the anti-rotation groove 3011 in the hole of the right cup, limiting the rotation of the primary sensor component 2 around the shaft 10. The limiting step 1805 abuts against the left end face of the right cup 301, limiting the displacement of the primary sensor component 2 to the right.

[0076] See Figure 12 , Figure 12 yes Figure 3 The explosion diagram, combined with Figure 8 , Figure 13 The secondary control circuit unit includes a secondary data processing circuit 13 and a secondary coil 16, which are disposed outside the shaft 10 and fixedly connected. The first deformation sensor 11 and the secondary coil 16 are electrically connected to the secondary data processing circuit 13. Figure 6 The secondary coil 16 is located on the secondary coil position 102 on the shaft 10.

[0077] The secondary data processing circuit 13 and the primary data processing circuit 12 transmit signals wirelessly. The primary data processing circuit 12 provides power to the secondary data processing circuit 13 wirelessly through the primary coil 17 and the secondary coil 16. The secondary data processing circuit 13 can be a flexible circuit board, and it can be fixedly connected to the outer peripheral surface of the shaft 10 with adhesive.

[0078] The specific secondary data processing circuit 13 transmits the pedaling torque signal sensed by the first deformation sensor 11 to the primary control circuit unit through the primary coil 17 and the secondary coil 16 in a wireless signal modulation and demodulation manner.

[0079] The secondary data processing circuit 13 transmits wireless signals to the primary data processing circuit 12 via the primary coil 17 and the secondary coil 16. Alternatively, the primary and secondary data processing circuits are each electrically connected to a secondary coil, and the secondary data processing circuit transmits torque signals to the primary data processing circuit wirelessly via these secondary coils. Specifically, the primary data processing circuit 12 is electrically connected to a secondary coil A, and the secondary data processing circuit 13 is electrically connected to a secondary coil B. The secondary data processing circuit 13 then wirelessly transmits torque signals to the primary data processing circuit via these secondary coils A and B. The wireless signal transmission method can be a modulated carrier signal.

[0080] Or, such as Figure 8 , 12As shown in Figure -14, the primary component 2 of the sensor also includes an infrared receiving element 14. The secondary control circuit unit also includes an infrared emitting element 15, which is electrically connected to the secondary data processing circuit 13. The infrared receiving element 14 is electrically connected to the primary data processing circuit 12. The secondary data processing circuit 13 transmits signals to the primary data processing circuit 12 wirelessly via the infrared emitting element 15 and the infrared receiving element 14. The infrared receiving element 14 is disposed on the primary data processing circuit 12, and the infrared emitting element 15 is disposed on the secondary data processing circuit 13. Infrared signal transmission via the infrared emitting element 15 and the infrared receiving element 14 has advantages such as good transmission stability and strong anti-interference ability, effectively improving the quality of data transmission. According to one embodiment of this application, the primary data processing circuit 12 is a flexible circuit board.

[0081] Those skilled in the art will understand that both electromagnetic induction coupling and infrared transceiver methods fall under the broad category of wireless communication.

[0082] The secondary control circuit unit also includes a secondary protective sleeve 20 with an adjustable diameter. For example, an axial opening can be formed on the outer wall of the secondary protective sleeve 20, allowing the diameter of the secondary protective sleeve 20 to be adjusted. Figure 12 In the middle, the horizontal line on the surface outside the opening of the secondary protective sleeve 20 indicates this. Combined with... Figure 6 The secondary protective sleeve 20 is mounted on the secondary data processing circuit protective sleeve fixing position 105. After the secondary protective sleeve 20 is assembled onto the shaft 1 and fixed, its outer diameter should be less than 24mm to facilitate the shaft after assembling the secondary control circuit unit to pass through the inner hole of the right cup assembly 3. The secondary protective sleeve 20 can be fitted onto the shaft 10 by opening its inner diameter to allow it to be fitted onto the shaft 10, or by using a mold and applying glue to protect the secondary data processing circuit 13 and the secondary coil 16. After the glue dries, the mold is removed. The outer diameter of the glue after drying can also be less than 24mm. The secondary protective sleeve 20 and the outer surface of the shaft 10 form an installation cavity, and the secondary data processing circuit 13 and the secondary coil 16 are located inside the installation cavity. The secondary data processing circuit 13 and the secondary coil 16 are protected by the secondary protective sleeve 20 to prevent them from being damaged during production operations. At this time, sealant can be filled into the mounting cavity to achieve waterproof sealing of the secondary data processing circuit 13 and the secondary coil 16. In addition, the shock-absorbing performance of the secondary data processing circuit 13 and the secondary coil 16 can also be improved.

[0083] Similarly, a primary protective sleeve 19 can be provided for the primary data processing circuit 12 to protect both the primary data processing circuit 12 and the primary coil 17. The primary protective sleeve 19 covers the primary data processing circuit 12 and the primary coil 17. Finally, glue is injected into the excess space between the primary protective sleeve 19 and the primary data processing circuit fixing shell 18 to increase the sealing and waterproof function and improve the shock absorption performance.

[0084] Please see Figures 6-8 The number of first deformation sensors 11 is at least one. The first deformation sensor 11 is fixedly connected to the shaft roller 10, typically by adhesive bonding the first deformation sensor 11 to the surface between the two end faces of the shaft roller 10. Using the end face of the shaft roller 10 as a reference plane, and extending the line connecting the center of the crankshaft roller mounting hole 303 and the center of the foot pedal mounting hole 304 as a reference line, the line connecting the center point of the first deformation sensor 11 to the center point of the end face of the shaft roller 10 is the first connecting line. The first connecting line is parallel to, perpendicular to, or forms an angle with the reference line. Preferably, the first connecting line forms a certain angle with the reference line; angles of 0°, 30°, 45°, 60°, 90°, 135°, 180°, 225°, 270°, and 315° are generally considered advantageous. The line connecting the crank assembly marking center and the axle roller axis can be parallel to the baseline. The first connecting line and the baseline form a certain angle to ensure that the angle of the first deformation sensor 11 at the axle roller 10 is consistent with the crank assembly direction, thereby ensuring that the angle of the first deformation sensor 11 is consistent with the direction of the pedal force when riding, thus achieving batch consistency and more accurately sensing the pedal force.

[0085] like Figure 17 As shown, there are two first deformation sensors 11, which are symmetrically arranged relative to the axis. The two deformation sensors are typically integrated into a full-bridge circuit, which effectively mitigates interference from temperature and other forces, thus improving the measurement accuracy of the torque sensor.

[0086] Specifically, such as Figure 8 , Figures 13-17 As shown, the hollow integrated crankshaft sensor device also includes a left bearing 242 and a right bearing 241, which are sleeved on both ends of the shaft roller 10 after being assembled into the vehicle. Figure 6The image shows the bearing position 101 on the roller where the bearing is installed. The first deformation sensor 11 is located between the left bearing 242 and the right bearing 241. The angle between the first connecting line and the reference line is 90°. When the right crank 9 is pressed down and rotated, the right bearing 241 acts as a fulcrum, where the roller is subjected to an upward force F1. The left bearing 242 acts as a force-bearing fixing part, where the roller is subjected to a downward force F2. At this time, the middle of the roller 10 slightly arches upward and deforms. The first deformation sensor 11 senses the magnitude of the foot pedaling torque by sensing the degree of bending of the roller 10.

[0087] The first deformation sensor 11 senses the force at a different patch angle. During riding, when the right crank is pressed down, a downward pedaling force is generated. The crank drives the chainring to rotate, the chainring drives the chain to rotate, and the chain pulls backward, generating tension. This tension causes the axle 10 to bend forward. Force analysis of the axle 10 shows that the resultant force can be obtained from the downward pedaling force and the chain tension. The angle between the direction of the resultant force and the extension line of the crank is approximately 45°. Therefore, the angle between the first deformation sensor 11 and the axle's first line and the reference line can be set to 45°, 135°, 225°, or 315° for better sensing effect.

[0088] The first deformation sensor 11 is a strain gauge. The angle between the first line connecting the strain gauge and the shaft 10 and the reference line is typically set to 0°, 45°, 90°, 135°, 180°, 225°, 270°, or 315° for better relative sensing effect, in order to detect the bending deformation of the shaft 10 caused by external force. This technology allows the finished sensor to be made smaller and simpler in structure, greatly reducing cost, after-sales difficulty, and assembly complexity.

[0089] By setting a crank assembly mark 106 and a corresponding axle assembly mark 107 in the crank's axle assembly hole, and by using a first deformation sensor 11 and axle 10 to form a first connection line with a reference line at a certain angle (typically 0°, 45°, 90°, 135°, 180°, 225°, 270°, or 315°), the first deformation sensor 11 can clearly sense the torque in the direction of force on the axle 10. This improves the consistency of the deformation sensor and thus enhances the accuracy of the torque sensor. Consequently, the consistency of pedal force perception data during riding is better ensured in mass-produced products, better meeting the riding experience needs of each end customer.

[0090] like Figure 16As shown, in some embodiments, the primary sensor assembly 2 further includes at least one second deformation sensor 11A. Using the end face of the axle roller as a reference plane, and the line connecting the center of the crank axle roller mounting hole 303 and the center of the foot pedal mounting hole 304 as a reference line, the line connecting the center point of the second deformation sensor and the center point of the axle roller end face is a second connecting line. The second connecting line forms a certain angle with the reference line, typically set to 0°, 45°, 90°, 135°, 180°, 225°, 270°, or 315°. The first deformation sensor 11A and the second deformation sensor are generally used to sense the downward force of the foot pedal (the magnitude of the upward bending of the middle part of the axle roller), and the other to sense the magnitude of the backward tension of the chain caused by the pedaling force (the magnitude of the bending of the middle part of the axle roller towards the front of the vehicle). The first deformation sensor and / or the second deformation sensor are located between the left bearing and the right bearing of the axle roller.

[0091] In some embodiments, please refer to Figure 16 , Figure 16 This is a schematic diagram showing the positional relationship between the first deformation sensor and the second deformation sensor on the surface of the shaft in the primary sensor assembly 2 of an embodiment of this application. Figure 17 As shown in the lower part of the diagram, the first line is perpendicular to the second line. Figure 17 As shown in the diagram above, the first and second lines are parallel. The first deformation sensor is used to sense the vertical bending deformation of the axle 10 in the horizontal direction during crank pedaling. The second deformation sensor is used to sense the forward and backward bending deformation of the axle 10 caused by the chain pulling backward when the crank is horizontal during riding. By combining the data sensed by the first and second deformation sensors, the accuracy of the torque sensed by the hollow integrated crank crank sensor device can be improved, reducing misjudgments of actual pedaling behavior. When the user's foot is on the pedal and the chain is rotating, a torque signal that changes the magnitude of the pedaling force should be output. When the user's two feet are on the pedal simultaneously without rotating the chain, the torque should not change (no actual pedaling). This allows for a more accurate sensing of the actual pedaling force data of the cyclist.

[0092] In one embodiment, two second deformation sensors are used, and these two second deformation sensors are symmetrically arranged with respect to the axis of the shaft. The two deformation sensors are typically integrated into a full-bridge circuit, which can effectively avoid interference from temperature and other forces, thereby improving the measurement accuracy of the primary component 2 of the sensor.

[0093] Please see Figure 5 , 16The outer surface of the shaft roller 10 is provided with a mounting plane 104. The mounting plane 104 is used to mount the first deformation sensor 11 and / or the second deformation sensor. The first deformation sensor 11 and / or the second deformation sensor are mounted on the surface of the mounting plane 104, which is the patch surface. By providing the mounting plane 104 on the shaft roller 10 to mount the first deformation sensor 11 and / or the second deformation sensor, the integrated crankshaft assembly 1 is easier to manufacture and has a more compact structure.

[0094] According to one embodiment of this application, the first deformation sensor 11 can also be directly mounted on the outer circular surface of the shaft 10, such as... Figure 17 As shown. That is to say, the patch surface of the first deformation sensor 11 can be the surface of the shaft 10.

[0095] In some embodiments, the secondary control circuit unit further includes a first shielding plate 221, which is disposed between the shaft 10 and the secondary coil 16. In some embodiments, a second shielding plate 222 may also be disposed in the primary control circuit unit, which is disposed in the first slot 1807 of the right half-shell 1802 outside the primary coil 17. By providing the first shielding plate 221 and the second shielding plate 222, interference signals can be shielded, thereby improving the power transmission efficiency between the primary control circuit unit and the secondary control circuit unit.

[0096] In some embodiments, a heat-shrink tubing 23 is applied over the second shielding sheet 222. The heat-shrink tubing 23, after being heat-shrinked, is used to protect the second shielding sheet 222 and prevent it from warping.

[0097] like Figure 14 , 8 As shown, in some embodiments, the hollow integrated crankshaft sensor device further includes a speed sensor, which includes a speed sensing element 7 and a speed sensing element 6. The speed sensing element 6 is fixedly connected to the shaft roller 10, and the speed sensing element 7 is electrically connected to the primary data processing circuit 12. The speed sensing element 7 and the speed sensing element 6 are positioned opposite each other after being assembled into the vehicle.

[0098] The speed sensing element 6 can be made of ferromagnetic material, specifically two semi-circular magnetic rings with several N and S magnetic poles on their outer diameter. These rings are assembled into the magnetic ring grooves of the shaft and fixed with glue to form a complete magnetic ring. Figure 6 , 8The speed sensing element 6 consists of two semi-circular magnetic rings uniformly filled with several N / S magnetic poles, which are fitted and fixed in the magnetic ring mounting groove 103 on the surface of the roller 10. The speed sensing element 7 is at least one Hall element. The rotational speed of the roller 10 is determined by measuring the change in magnetic flux of the speed sensing element 6. Here, there are two Hall elements. The order of the magnetic poles on the surface of the magnetic rings fixed on the roller 10 can determine the forward and reverse rotation of the roller 10. The speed and direction of the roller 10 are the pedal frequency data. Combined with its torque data, overall vehicle speed data, etc., the data is fed to the vehicle control system. The vehicle control system uses the various riding perception data provided by these sensors to better control the torque and speed of the motor to meet the changing intelligent riding comfort, that is, the so-called human-bike integrated riding experience.

[0099] like Figure 18 As shown, the right bowl component assembly 3 includes a right bowl component 301, a right bearing 241, and a right dust cover 252. The right bearing 241 is assembled in the bearing hole 3013 of the right bowl component 301, and the right dust cover 252 is fitted into the inner hole of the right bearing 241. The inner hole of the right bowl component is provided with a right bowl component outer shell step 3012 and an anti-rotation groove 3011.

[0100] Combination Figures 10-13 The sensor primary component 2 has a second groove 1809 for placing an O-ring, an anti-rotation rib 1806, and a limiting step 1805 on its right outer side. The O-ring 21 is placed in the second groove 1809. The right end of the sensor primary component 2 is assembled into the right cup 301. The right O-ring 212 is placed on the right side of the step 3012 on the outer shell of the right cup 301 to fix the sensor primary component 2 to move towards the left cup component 4. The limiting step 1805 abuts against the left end of the right cup 301 to restrict the sensor primary component 2 from moving to the right. The anti-rotation rib 1806 on the outer diameter of the right side of the sensor primary component 2 is engaged in the anti-rotation groove 3011 inside the right cup 301 to restrict the rotation of the sensor primary component 2.

[0101] The sensor primary component 2 has a sensor primary data processing circuit fixing housing 18 removal hole 1803 on the inner left side for removing the sensor primary component 2.

[0102] The primary component 2 of the sensor also includes a signal line 26. The right half shell 1802 has a wire outlet hole or wire outlet groove 1811 through which the signal line 26 passes.

[0103] like Figure 19As shown, the left cup assembly 4 includes a left cup 401, a left bearing 242, and a left dust cover 251. The left bearing 242 is fitted into the bearing hole 4011 of the left cup 401, and the left dust cover 251 is fitted into the inner hole of the left bearing 242. An O-groove is provided on the outer diameter of the left side of the sensor primary assembly 2, and a left O-ring 211 is set in the O-groove. After the sensor primary assembly 2 and the left cup assembly 4 are assembled, the left O-ring 211 is placed in the hole of the left cup 401.

[0104] In some embodiments, the main core technology can be applied not only to a torque sensor device for a common bottom bracket structure of an electric bicycle, but also to a torque sensor device inside the mid-mounted motor of an electric bicycle.

[0105] In addition, this utility model also provides a bicycle, including the hollow integrated chainring and crank sensor device described above. This device has torque sensing and speed detection functions. The specific structure is as described in the above embodiments. Since the bicycle adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. Those skilled in the art will understand that the bicycle described herein includes bicycles with pedals that utilize human power for transmission, but does not exclude bicycles assisted by electric motors.

[0106] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A hollow one-piece puck crank sensor device, characterized by, The hollow integrated crank sensor device comprises a shaft stick integrated crank assembly, a sensor primary assembly, a right bowl component assembly, a left bowl component assembly, a left crank, and at least one first deformation sensor. The shaft stick integrated crank assembly comprises a shaft stick, a crank, a right crank, and a secondary control circuit unit. The secondary control circuit unit comprises a secondary data processing circuit and a secondary coil and is arranged outside the shaft stick; the first deformation sensor and the secondary coil are electrically connected to the secondary data processing circuit; and the first deformation sensor is arranged on the outer surface of the shaft stick. The sensor primary assembly comprises a primary data processing circuit fixed housing and a primary control circuit unit; the primary control circuit unit comprises a primary data processing circuit, a primary coil, and a signal line; and the primary data processing circuit is electrically connected to the primary coil and the signal line. Wireless signal transmission is provided between the secondary data processing circuit and the primary data processing circuit; and the primary data processing circuit provides power for the secondary data processing circuit in a wireless manner through the primary coil and the secondary coil. The end surface of the shaft stick is used as a reference surface, a line extending between the center points of the shaft stick mounting hole and the pedal mounting hole of the crank is used as a reference line, a line extending between the center point of the patch surface of the first deformation sensor and the center point of the end surface of the shaft stick is a first line, and the first line is parallel, perpendicular, or at an angle to the reference line.

2. The hollow one-piece puck crank sensor device of claim 1, wherein, The angle between the first line and the reference line is 0°, 30°, 45°, 60°, 90°, 135°, 180°, 225°, 270°, or 315°.

3. The hollow one-piece puck crank sensor device of claim 1, wherein, The shaft stick is provided with a crank assembly mark for indicating the assembly direction of the crank; and the assembly direction of the crank is the direction in which the shaft stick mounting hole of the crank points to the pedal mounting hole.

4. The hollow one-piece puck crank sensor device of claim 1, wherein, The hollow integrated crank sensor device further comprises at least one second deformation sensor; a line extending between the center point of the patch surface of the second deformation sensor and the center point of the end surface of the shaft stick is a second line; and the angle between the second line and the reference line is 0°, 45°, 90°, 135°, 180°, 225°, 270°, or 315°.

5. The hollow one-piece puck crank sensor device of claim 1, wherein, A left bearing is arranged in the left bowl component assembly, a right bearing is arranged in the right bowl component assembly, the left bowl component assembly and the right bowl component assembly are located at the two ends of the shaft stick after being assembled to the whole vehicle, and the first deformation sensor and / or the second deformation sensor are located between the left bearing and the right bearing of the shaft stick.

6. The hollow one-piece puck crank sensor device of claim 1, wherein, The number of the first deformation sensors is two, and the two first deformation sensors are symmetrically arranged relative to the shaft center line.

7. The hollow one-piece puck crank sensor device of claim 1, wherein, The outer surface of the shaft stick is provided with a mounting plane for mounting the first deformation sensor.

8. The hollow one-piece puck crank sensor device of claim 1, wherein, The primary data processing circuit and the secondary data processing circuit are respectively electrically connected to a secondary coil; and the secondary data processing circuit transmits the torque signal to the primary data processing circuit in a wireless signal manner through the secondary coil.

9. The hollow one-piece puck crank sensor device of claim 1, wherein, The secondary control circuit unit comprises an infrared transmitting element, the primary control circuit unit comprises an infrared receiving element, the infrared transmitting element is electrically connected with the secondary data processing circuit, the infrared receiving element is electrically connected with the primary data processing circuit, and the secondary data processing circuit transmits the torque signal to the primary data processing circuit in an infrared manner through the infrared transmitting element and the infrared receiving element.

10. The hollow one-piece puck crank sensor device of claim 1, wherein, The shaft-clevis integrated crank assembly further comprises a secondary protective sleeve with adjustable diameter, which is sleeved on the outer surface of the shaft clevis by being expanded to increase the inner diameter of the secondary protective sleeve; and an installation cavity is formed between the outer surface of the shaft clevis and the secondary protective sleeve, and the secondary data processing circuit, the secondary coil and the first deformation sensor are located in the installation cavity.

11. The hollow one-piece puck crank sensor device of claim 1, wherein, The sensor primary assembly further comprises a primary protective sleeve, which covers the primary data processing circuit and the primary coil.

12. The hollow one-piece puck crank sensor device of claim 1, wherein, The hollow integrated crankset sensor device further comprises a shielding sheet, which is arranged between the shaft clevis and the secondary coil.

13. The hollow one-piece puck crank sensor device of claim 1, wherein, The right bowl assembly comprises a right bowl, a dustproof cover and a right bearing, and the inner hole of the right bowl is provided with a right bowl shell step and a rotation stopping groove; the outer diameter of the right side of the sensor primary assembly is provided with a second groove, a rotation stopping rib and a limiting step; a right O-shaped ring is arranged in the second groove, the right side of the sensor primary assembly is assembled into the right bowl, the right O-shaped ring is arranged on the right side of the right bowl shell step, the limiting step abuts against the left end of the right bowl, and the rotation stopping rib of the outer diameter of the right side of the sensor primary assembly is clamped in the rotation stopping groove in the right bowl.

14. The hollow one-piece puck crank sensor device of claim 1, wherein, The left inner wall of the sensor primary assembly is provided with a disassembly hole for disassembling the sensor primary assembly.

15. The hollow one-piece puck crank sensor device of claim 1, wherein, The speed sensor comprises a speed sensing element and a speed sensed element, and the speed sensed element is a ferromagnetic element; the speed sensing element is contained in the sensor primary assembly and electrically connected with the primary data processing circuit; the speed sensed element is fixed on the outer surface of the shaft clevis, and the speed sensed element is part of the shaft-clevis integrated crank assembly.

16. The hollow one-piece puck crank sensor device of claim 15, wherein, The speed sensed element comprises two semicircular magnetic rings uniformly filled with a plurality of N / S magnetic poles; the semicircular magnetic rings are sleeved and fixed in the magnetic ring installation groove on the surface of the shaft clevis.

17. The hollow one-piece puck crank sensor device of claim 1, wherein, The primary data processing circuit fixing shell comprises a right half shell and a left half shell; the primary data processing circuit is fixedly connected with the left half shell, and the primary coil is fixedly connected with the right half shell.

18. The hollow one-piece puck crank sensor device of claim 17, wherein, The left half shell is provided with a hollow signal wire welding groove; the primary data processing circuit is sleeved on the inner wall of the left half shell, and the signal connection pad is correspondingly arranged with the signal wire welding groove.

19. A bicycle characterized by The bicycle comprises the hollow integrated crankset sensor device according to any one of claims 1 to 18.

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