Hollow integrated crankset crank sensor device and bicycle

Abstract

The invention 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 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 present invention relates to the field of bicycles, and particularly to a hollow integrated chainring crank sensor device and a bicycle. Background Art

[0002] In the field of bicycles, people have higher and higher requirements for short-distance intelligent travel or large-health intelligent cycling sports. Torque perception during cycling has become necessary. However, it is difficult to integrate a torque sensor into a hollow integrated chainring crank with a conventional bottom bracket size (the axle, chainring, and right crank are an integrated structure, which is the most commonly used high-end integrated chainring crank accessory for mid- to high-end bicycles). Because the conventional bottom bracket size is British Standard Association (BSA) (thread outer diameter 34.798, pitch 1.37 * 24 TPI), which is the most common bottom bracket size specification. The outer diameter of the axle of the high-end hollow integrated chainring crank is greater than or equal to 24 mm. In this way, the minimum size of the bottom bracket of the frame does not exceed 34, and the size left for the sensor on one side is less than 5 mm. Considering the need to pass signal wires, it is almost impossible. This is a pain point that has always existed in the development of intelligent torque sensors for electric bicycles. Summary of the Invention

[0003] The main object of the present invention is to provide a hollow integrated chainring crank sensor device and a bicycle with torque sensing function to solve the problem that the torque sensor cannot be integrated into the hollow integrated chainring crank in the prior art.

[0004] To achieve the above object, a hollow integrated chainring crank sensor device proposed by the present invention includes: the hollow integrated chainring crank sensor device includes an axle-integrated chainring crank assembly, a sensor primary assembly, a right cup assembly, a left cup assembly, a left crank, and at least one first deformation sensor;

[0005] The axle-integrated chainring crank assembly includes an axle, a chainring, a right crank, and a secondary control circuit unit;

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

[0007] The sensor primary assembly includes a primary data processing circuit fixed housing and a primary control circuit unit; the primary control circuit unit includes a primary data processing circuit, a primary coil, and a signal wire, and the primary data processing circuit is electrically connected to the primary coil and the signal wire;

[0008] The wireless signal transmission is between the secondary data processing circuit and the primary data processing circuit, and the primary data processing circuit provides electrical energy to the secondary data processing circuit wirelessly through a primary coil and a secondary coil;

[0009] Taking the end face of the shaft rod as the reference plane, and taking the connection line between the center point of the shaft rod mounting hole of the crank and the center point of the pedal mounting hole and extending it as the reference line, the connection line between the center point of the attaching surface of the first deformation sensor and the center point of the end face of the shaft rod is the first connection line, and the first connection line is parallel to, perpendicular to or forms an angle with the reference line;

[0010] A left bearing is arranged inside the left bowl component, and a right bearing is arranged inside the right bowl component. The left bowl component and the right bowl component are located at both ends of the shaft rod after being assembled into the whole vehicle, and the first deformation sensor is located between the left bearing and the right bearing of the shaft rod.

[0011] Optionally, the angle between the first connection line and the reference line is 0°, 30°, 45°, 60°, 90°, 135°, 180°, 225°, 270°, 315°.

[0012] Optionally, the shaft rod is provided with a crank assembly mark for indicating the assembly direction of the crank; the assembly direction of the crank is the direction from the shaft rod mounting hole of the crank to the pedal mounting hole.

[0013] Optionally, the hollow integrated chainring crank sensor device further includes at least one second deformation sensor. The connection line between the center point of the attaching surface of the second deformation sensor and the center point of the end face of the shaft rod is the second connection line, and the angle between the second connection line and the reference line is 0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°.

[0014] Optionally, the second deformation sensor is located between the left bearing and the right bearing of the shaft rod.

[0015] Optionally, the number of the first deformation sensors is two, and the two first deformation sensors are symmetrically arranged with respect to the axis center line.

[0016] Optionally, the outer surface of the shaft rod is provided with a mounting plane for mounting the first deformation sensor.

[0017] Optionally, 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 a torque signal to the primary data processing circuit through the secondary coil in a wireless signal manner.

[0018] Optionally, the secondary control circuit unit includes an infrared emitting element, the primary control circuit unit includes an infrared receiving element, the infrared emitting element is electrically connected to the secondary data processing circuit, the infrared receiving element is electrically connected to 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 emitting element and the infrared receiving element.

[0019] Optionally, the shaft and sprocket integrated chainring crank assembly further includes a secondary protective sleeve with an adjustable diameter. The inner diameter of the secondary protective sleeve is enlarged by opening it and sleeved outside the shaft; and an installation cavity is formed between the outer surface of the secondary protective sleeve and the shaft. The secondary data processing circuit, the secondary coil, and the first deformation sensor are located in the installation cavity.

[0020] Optionally, the sensor primary component further includes a primary protective sleeve that covers the primary data processing circuit and the primary coil.

[0021] Optionally, the hollow integrated chainring crank sensor device further includes a shielding sheet disposed between the shaft and the secondary coil.

[0022] 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 housing step and an anti-rotation groove; the outer diameter of the right side of the sensor primary component is provided with a second groove, an anti-rotation rib, and a limit step; a right O-ring is disposed in the second groove. The right end of the sensor primary component is assembled into the right cup. The right O-ring is placed on the right side of the right cup housing step, the limit step abuts against the left end of the right cup, and the anti-rotation rib on the outer diameter of the right side of the sensor primary component is clamped in the anti-rotation groove inside the right cup.

[0023] Optionally, a disassembly hole is provided in the inner wall of the left side of the sensor primary component for disassembling the sensor primary component.

[0024] Optionally, a speed sensor is further included. The speed sensor includes a speed sensing element and a speed sensed element, and the speed sensed element is a ferromagnetic element; the speed sensing element is included in the sensor primary component and is electrically connected to the primary data processing circuit; the speed sensed element is fixed on the outer surface of the shaft, and the speed sensed element is a part of the shaft and sprocket integrated chainring crank assembly.

[0025] Optionally, the speed sensed element is two semi-circular magnetic rings evenly filled with a number of N / S magnetic poles; the semi-circular magnetic rings are sleeved and fixed in the magnetic ring installation groove on the surface of the shaft.

[0026] Optionally, the fixed housing of the primary data processing circuit 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.

[0027] Optionally, a hollow signal line welding 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 arranged with the signal line welding grooves.

[0028] A bicycle, said bicycle comprising the hollow integrated chainring crank sensor device as described above.

[0029] In the technical solution of the present invention, the first deformation sensor is fixedly connected to the shaft rod. The first deformation sensor senses the torque of the left and right feet by sensing the bending force, shear force or resultant force of the shaft rod. Through this unique assembly design, the first deformation sensor is arranged at a special angular position of the outer diameter of the shaft rod relative to the assembly direction of the crank. It has a small volume, and the chainring crank does not change its original structure and can be universal, reducing the after-sales difficulty and assembly complexity. And by setting the crank assembly mark to indicate the assembly direction of the crank, the consistency of the torque sensor can be improved, thereby improving the sensing accuracy of the torque sensor. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0031] Figure 1 It is a schematic structural diagram of a hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0032] Figure 2 It is a schematic diagram of the finished product expansion of a hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0033] Figure 3 It is a schematic diagram of the shaft rod integrated chainring crank assembly 1 of a hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0034] Figure 4 It is another schematic diagram of the expansion of a part of the structure of a hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0035] Figure 5 It is a schematic diagram of the assembly of the shaft rod structure and the crank of a hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0036] Figure 6 It is a schematic diagram of the shaft rod structure of a hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0037] Figure 7 Schematic diagram showing an example of the positional relationship between the first connection wire and the reference line of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0038] Figure 8 Explosion diagram of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0039] Figure 9 Explosion diagram of the sensor primary component 2 of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0040] Figure 10 Schematic diagram of one perspective of the fixed housing 18 of the sensor primary data processing circuit of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0041] Figure 11 Schematic diagram of another perspective of the fixed housing 18 of the sensor primary data processing circuit of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0042] Figure 12 Explosion diagram of the shaft-stick integrated chainring crank assembly 1 of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0043] Figure 13 Cross-sectional view of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0044] Figure 14 Schematic diagram of one perspective of the primary data processing circuit of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0045] Figure 15 Schematic diagram showing the force on the first deformation sensor of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0046] Figure 16 Schematic diagram showing the positions of the first deformation sensor and the second deformation sensor on the surface of the shaft stick of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0047] Figure 17 Assembly diagram of the first deformation sensor and the shaft stick of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0048] Figure 18 Schematic diagram of the left cup component of the hollow integrated chainring crank sensor device according to an embodiment of the present application;

[0049] Figure 19 Schematic diagram of the right cup component of the hollow integrated chainring crank sensor device according to an embodiment of the present application.

[0050] Explanation of the attached reference numerals:

[0051]

[0052]

[0053] The realization of the object of the present invention, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0054] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0055] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0056] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0058] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] For convenience of description, features representing spaces such as slots, holes, and cavities are labeled in the drawings with lead lines with arrows, and solid structure features are labeled in the drawings with lead lines without arrows.

[0060] To better elaborate on the technical solution of the present application, it is necessary to describe the bottom bracket and chainring crank of a bicycle. After more than 100 years of development of bicycles, various components are very perfect and mature. Especially for the BB bottom bracket and chainring crank, JIS square structure BB bottom brackets (shaft rod outer diameter of 16 mm or 17 mm) and chainring cranks are mainly selected for mid- to low-end models, while the vast majority of high-end models choose hollow integrated chainring crank sensor devices (shaft rod outer diameter of 24 mm). The above two bottom bracket structures are most commonly paired with BSA bottom brackets (bottom bracket inner diameter of about 34 mm) or higher-end options of larger-diameter aluminum alloy bottom brackets (diameter of about 30 mm, and at this time the bottom bracket thread is usually M47, and the bottom bracket diameter is larger - 47 mm). In the field of electric bicycles, only the JIS square structure BB bottom bracket can achieve torque integration among the above bottom bracket structures. Due to the limitations of the BSA standard bottom bracket size and the size and structure of the hollow integrated chainring crank sensor device, none of the technical solutions for the hollow integrated chainring crank sensor device and the BB bottom bracket can integrate a torque sensor without changing the overall structure of the original components in the original bicycle field, which has hindered the intelligent development of electric bicycles.

[0061] Existing torque sensor technical solutions are all proposed for torque sensors for ordinary JIS standard BB bottom brackets (the shaft rod of the bottom bracket and the right chainring crank are independent components, and the square structure at both ends of the shaft rod is a conventional structure), but no bilateral torque sensor technical solution has been proposed for another more conventional high-end hollow integrated bottom bracket chainring crank structure in the bicycle field, which has troubled the electric bicycle industry for many years. The main reasons are: 1. To achieve bilateral torque in the conventional technical route, a metal induction sleeve needs to be added outside the shaft rod; 2. The shaft rod outer diameter of the hollow integrated chainring crank sensor device is 24 mm, which is too large; 3. The bottom bracket of the conventional bicycle frame is of the British BSA structure, and the maximum inner diameter is about 34 mm, and the size is very limited. The above three technical difficulties restrict the integration of the bilateral torque sensor in this structural size (hollow integrated chainring crank sensor device).

[0062] This patent focuses on solving the problem of integrating the internal part of the high-end hollow integrated chainring crank sensor device with the bottom bracket sleeve of the frame under the existing conventional bottom bracket size conditions, effectively solving the application of the high-end bicycle accessory structure, which has troubled the industry for many years, in the field of electric bicycles.

[0063] To solve the above problems, the present invention provides a structure in which a torque sensor is integrated on the shaft rod and the middle shaft sleeve of the hollow integrated chainring crank sensor device on the basis of the original bicycle. Among them, the middle shaft sleeve corresponds to the fixed housing 18 of the primary data processing circuit of the present application.

[0064] Specifically, please refer to Figure 1 , Figure 1 which is a schematic assembly structure diagram of the torque sensor device of the hollow integrated chainring crank sensor device. It is a schematic structure diagram of the integrated shaft rod chainring crank assembly 1, the sensor primary assembly 2, the right cup assembly 3, the left cup assembly 4, and the left crank 5 assembled together, and is also the structural form after being assembled to the whole vehicle.

[0065] The integrated shaft rod chainring crank assembly 1 further includes a shaft rod 10, a chainring 8, and a right crank 9. The shaft rod 10, the chainring 8, and the right crank 9 are integrally and fixedly connected to form a module. Here, the integral and fixed connection can be an integrally formed structure or can be fixedly combined into a whole by means of a screw locking structure, a tight-fitting tooth connection, etc. The sensor primary assembly 2 is arranged between the left cup assembly 4 and the right cup assembly 3 and is sleeved on the shaft rod 10 of the integrated shaft rod chainring crank assembly 1. The first deformation sensor 11 is arranged on the outer surface of the shaft rod 10. The first deformation sensor 11 can be fixedly connected to the shaft rod by glue, for example.

[0066] Please refer to Figure 2 , Figure 2 which is a schematic diagram of the finished product expansion of the torque sensor device of the hollow integrated chainring crank sensor device. It is a schematic diagram of the expansion of the integrated shaft rod chainring crank assembly 1, the sensor primary assembly 2, the right cup assembly 3, the left cup assembly 4, and the left crank 5, and is also each module part presented to the customer.

[0067] Please refer to Figure 3 , Figure 3 which is another schematic diagram of the finished product expansion of the torque sensor device of the hollow integrated chainring crank sensor device. It forms the frame middle shaft sleeve structure with the sensor primary assembly 2, the right cup assembly 3, and the left cup assembly 4, which is also the usual assembly method, and then forms an overall structure with the integrated shaft rod chainring crank assembly 1 and the left crank 5.

[0068] As Figure 5 shown, in this embodiment, one end of the shaft rod 10 is provided with a crank assembly mark 106, and a corresponding shaft rod assembly mark 107 is arranged in the shaft rod assembly hole of the crank, corresponding to Figure 4 , Figure 5 and Figure 6,曲柄装配标识106用于指示曲柄(包括左曲柄5和右曲柄9)的装配方向。 The crank assembly mark 106 and the shaft stick assembly mark 107 are structural forms, and the assembly direction of the crank is ensured to be consistent with the angle between the first deformation sensor 11 on the patch position of the shaft stick 10 through the special structure at both ends of the shaft stick 10 . At the same time, it is also conducive to the consistency of signal sensing, such as: the right foot pedaling moment signal increases in positive direction, and the left foot pedaling moment changes in decrease, which invisibly increases another signal perception - differentiates the left and right foot signal perception.根据本申请的一个实施例,该特殊结构是将轴棍两端沿周向排布的齿去除至少一个齿,形成沿着轴棍10的轴向延伸的曲面。此种加工工艺为现有的成熟加工工艺。曲柄装配标识106还可以是箭头,也可以是其他方式,例如点、线,用于指示安装方式。曲柄装配标识106优选地以对称方式设置在轴棍的周向,如 Figure 7 As shown, usually there are two crank marks 106 at each end of the shaft, and the two crank assembly marks 106 at one end are symmetrically arranged about the axis of the shaft.

[0069] Specifically, the shaft rod 10 can also be provided with a crank assembly mark 106 at one end thereof, indicating the assembly direction of one crank (for example, the left crank 5), and the assembly direction of the other crank (the right crank 9) is opposite to that of the crank (the left crank 5). In this way, the two cranks are ensured to be 180° apart.

[0070] See also Figures 4-7 The figure is a schematic diagram of the assembly angle direction of the crank and the shaft rod of an embodiment of the present application. The shaft rod assembly hole 303 of the crank is a circular hole with internal teeth, and a shaft rod assembly mark 107 structure corresponding to the crank assembly mark 106 structure at both ends of the shaft rod is also provided. The line connecting the center point of the shaft rod assembly hole 303 of the crank and the center point of the pedal hole 304 and extending to both ends is called the crank direction extension line, that is, Figure 7 Middle dotted line.

[0071] See also Figures 6-11 , the present application sets up a primary control circuit unit and a secondary control circuit unit to transmit electrical energy and electrical signals.

[0072] Combination Figure 9 The primary control circuit unit includes a primary data processing circuit 12 , a primary coil 17 and a signal line 26 , and the primary data processing circuit 12 is electrically connected to the primary coil 17 and the signal line 26 .

[0073] 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 fixed housing 18 of the primary data processing circuit. The primary data processing circuit 12 can be a flexible circuit board, and the primary data processing circuit 12 can be fixedly connected to the fixed housing 18 of the primary data processing circuit through glue, thereby realizing the fixation of the primary data processing circuit 12. The primary data processing circuit 12 provides electrical energy for the secondary data processing circuit 13 in a radio manner through the primary coil 17 and the secondary coil 16.

[0074] See Figures 8-12 , in the present application, the primary control circuit unit is arranged in the fixed housing 18 of the primary data processing circuit. The fixed housing 18 of the primary data processing circuit includes a right half shell 1802 and a left half shell 1801, and the right half shell 1802 is fixedly connected to the left half shell 1801. Specifically, the right half shell 1802 and the left half shell 1801 can be fixedly connected by tight fitting 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 installation part 1808 of the right half shell 1802 for fixing the primary coil 17 is installed in the installation hole 1810 of the left half shell 1801 where the primary data processing circuit 12 and the signal line 26 are fixed. A hollow signal line welding groove 1804 is provided on the left half shell 1801. The primary data processing circuit 12 is sleeved 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 welding groove 1804. In this way, the pads on the primary coil 17 and the primary data processing circuit 12 are conveniently electrically connected through the signal line welding groove 1804. Of course, one end of the signal line 26 and the pads on the primary data processing circuit 12 can also be conveniently electrically connected through the signal line welding groove 1804. Those skilled in the art can understand that the connection method for forming an electrical connection can be welding, crimping, or using a connector connection, etc., which are connection methods for realizing the transmission of electrical signals.

[0075] The wire outlet groove 1811 of the right half shell 1802 and the left half shell 1801 form a wire outlet hole after installation. The signal line 26 is led out from the wire outlet hole, and finally, sealant can be filled in the extra space between the right half shell 1802 and the left half shell 1801 to realize the sealing and waterproofing of the primary data processing circuit 12 and also improve the seismic and buffer performance of the primary control circuit unit.

[0076] A rotation stopping rib 1806 and a limiting step 1805 are also provided on the right half shell 1802. The rotation stopping rib 1806 is clamped with the rotation stopping groove 3011 in the right bowl part hole to limit the rotation of the primary sensor assembly 2 around the shaft rod 10. The limiting step 1805 abuts against the left end face of the right bowl part 301 to limit the rightward displacement of the primary sensor assembly 2.

[0077] See also Figure 12 , Figure 12 yes Figure 3 Explosion diagram of Figure 8 , Figure 13 The secondary control circuit unit includes a secondary data processing circuit 13 and a secondary coil 16, which are arranged 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 arranged on the secondary coil position 102 on the shaft rod 10 .

[0078] Wireless signal transmission is performed between the secondary data processing circuit 13 and the primary data processing circuit 12, and the primary data processing circuit 12 provides power to the secondary data processing circuit 13 in a wireless manner through the primary coil 17 and the secondary coil 16. The secondary data processing circuit 13 can be a flexible circuit board, and the secondary data processing circuit 13 can be fixedly connected to the outer peripheral surface of the shaft 10 by glue.

[0079] Specifically, the 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.

[0080] The secondary data processing circuit 13 transmits wireless signals to the primary data processing circuit 12 through the primary coil 17 and the secondary coil 16, or 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 through the secondary coil by wireless signals. That is, 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, and the secondary data processing circuit 13 transmits the torque signal to the primary data processing circuit by wireless means through the other group of secondary coils A and B. The wireless signal transmission method can be to modulate the carrier signal.

[0081] Or, if Figure 8 , 12As shown in FIG. -14, the primary sensor assembly 2 further includes an infrared receiving element 14. The secondary control circuit unit further includes an infrared transmitting element 15. The infrared transmitting element 15 is electrically connected to the secondary data processing circuit 13, and 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 in an infrared wireless manner through the infrared transmitting 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 transmitting element 15 is disposed on the secondary data processing circuit 13. Implementing signal transmission in an infrared manner through the infrared transmitting element 15 and the infrared receiving element 14 has the advantages of better transmission stability and strong anti-interference ability, and can effectively improve the quality of data transmission. According to one embodiment of the present application, the primary data processing circuit 12 is a flexible circuit board.

[0082] Those skilled in the art can understand that both the electromagnetic induction coupling method and the infrared transceiver method belong to the category of generalized wireless communication.

[0083] The secondary control circuit unit further includes a secondary protective sleeve 20 with an adjustable diameter. For example, a secondary protective sleeve opening can be axially formed on the outer wall of the secondary protective sleeve 20 so that the diameter of the secondary protective sleeve 20 can be adjusted. In Figure 12 FIG., the secondary protective sleeve opening of the secondary protective sleeve 20 is represented by a horizontal line on the outer surface. In combination with Figure 6 FIG., the secondary protective sleeve 20 is disposed on the secondary data processing circuit protective sleeve fixing position 105. After the secondary protective sleeve 20 is assembled onto the shaft rod 1 and fixed, its outer diameter should be less than 24 mm to facilitate the shaft rod after assembling the secondary control circuit unit to pass through the inner hole of the right wrist piece assembly 3. By expanding the secondary protective sleeve 20 to increase its inner diameter so that the secondary protective sleeve 20 is sleeved outside the shaft rod 10 or by using a die casting glue process to protect the secondary data processing circuit 13 and the secondary coil 16. After the glue dries, the die can be removed, and the outer diameter of the dried glue less than 24 mm is also acceptable. An installation cavity is formed between the outer surface of the secondary protective sleeve 20 and the shaft rod 10, and the secondary data processing circuit 13 and the secondary coil 16 are located in the installation cavity. By providing the secondary protective sleeve 20 to protect the secondary data processing circuit 13 and the secondary coil 16, it is possible to avoid damaging the secondary data processing circuit 13 and the secondary coil 16 during production operations. At this time, a sealing glue can be filled in the installation cavity to achieve sealing and waterproofing of the secondary data processing circuit 13 and the secondary coil 16, and also improve the seismic buffering performance of the secondary data processing circuit 13 and the secondary coil 16.

[0084] Similarly, a primary protective sleeve 19 can also be provided for the primary data processing circuit 12 to protect 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 extra space between the primary protective sleeve 19 and the fixed housing 18 of the primary data processing circuit to enhance the sealing and waterproof function and improve the anti-seismic and buffering performance.

[0085] Please refer to Figures 6-8 , the number of the first deformation sensors 11 is at least one, and the first deformation sensors 11 are fixedly connected to the shaft rod 10. Usually, the first deformation sensors 11 are adhered to the surface between the two end faces of the shaft rod 10 by glue. Taking the end face of the shaft rod 10 as the reference plane, and taking the line connecting the center of the shaft rod mounting hole 303 of the crank and the center of the pedal mounting hole 304 and extending it as the reference line, the line connecting the center point of the first deformation sensor 11 and the center point of the end face of the shaft rod 10 is the first connection line. The first connection line is parallel to, perpendicular to, or forms an angle with the reference line. Preferably, a certain angle is formed between the first connection line and the reference line, and the angle is usually set to be relatively beneficial at 0°, 30°, 45°, 60°, 90°, 135°, 180°, 225°, 270°, 315°. The line connecting the center of the crank assembly mark and the axis of the shaft rod can be parallel to the reference line, and a certain angle is formed between the first connection line and the reference line to ensure the angular consistency between the patch position of the first deformation sensor 11 on the shaft rod 10 and the assembly direction of the crank, and further ensure the angular consistency between the first deformation sensor 11 and the direction of the foot pedaling force during riding, so as to achieve batch consistency and more accurately sense the pedaling force.

[0086] As Figure 17 shown, the number of the first deformation sensors 11 is two, and the two first deformation sensors 11 are symmetrically arranged relative to the axis line. The two deformation sensors usually form a full-bridge circuit in the circuit assembly, which can well avoid the interference of temperature and other forces on it and is beneficial to improving the measurement accuracy of the torque sensor.

[0087] Specifically, as Figure 8 , Figures 13-17 shown, the hollow integrated chainring crank sensor device further includes a left bearing 242 and a right bearing 241, and the left bearing 242 and the right bearing 241 are sleeved on both ends of the shaft rod 10 after being assembled into the whole vehicle. Figure 6The bearing position 101 where the bearing is installed on the shaft is shown. The first deformation sensor 11 is located between the left bearing 242 and the right bearing 241. The angle between the first connection line and the reference line is 90°. When the right crank 9 is stepped on and rotated downward, the right bearing 241 serves as a fulcrum, and an upward force F1 is applied to the shaft here. The left bearing 242 serves as a force-receiving fixed part, and a downward force F2 is applied to the shaft here. At this time, the middle of the shaft 10 arches upward slightly and deforms. The first deformation sensor 11 senses the magnitude of the torque of the foot stepping by sensing the bending magnitude of the shaft 10.

[0088] The first deformation sensor 11 senses the force in another patch angle. During riding, when the right crank is stepped on downward, a downward stepping force is generated. The crank drives the chainring to rotate, the chainring drives the chain to rotate, and the chain pulls backward to generate a pulling force. The pulling force of the chain causes the middle of the shaft 10 to bend forward. By analyzing the forces on the shaft 10, the resultant force can be obtained through the downward stepping force and the pulling force of the chain. The angle between the direction of the resultant force and the extension line of the crank direction is approximately 45°. Therefore, the angle between the first connection line formed by the first deformation sensor 11 and the shaft and the reference line can be set to 45°, 135°, 225°, or 315° for better induction effect.

[0089] The first deformation sensor 11 is a strain gauge. The angle between the first connection line formed by the strain gauge and the shaft 10 and the reference line is usually set to 0°, 45°, 90°, 135°, 180°, 225°, 270°, 315° for relatively better induction effect to sense the bending deformation of the shaft 10 caused by external forces. The finished product volume of this technology sensor can be made smaller, the structure is simpler, and the cost, after-sales difficulty, and assembly complexity are greatly reduced.

[0090] By setting the crank assembly mark 106 and the corresponding shaft assembly mark 107 in the shaft assembly hole of the crank, and then cooperating with the angle between the first connection line formed by the first deformation sensor 11 and the shaft 10 set here, the angle is usually set to 0°, 45°, 90°, 135°, 180°, 225°, 270°, or 315°, so that the first deformation sensor 11 can clearly sense the torque in the force direction of the shaft 10, which can improve the consistency of the deformation sensor, thereby improving the sensing accuracy of the torque sensor. Thus, the consistency of the foot stepping force perception data of the products mass-produced by customers during riding is more guaranteed, and it better meets the good riding experience of each end customer.

[0091] Such as Figure 16As shown, in some embodiments, the sensor primary component 2 further includes at least one second deformation sensor 11A. Taking the end face of the shaft rod as the reference plane and the line connecting the center of the shaft rod mounting hole 303 of the crank and the center of the pedal mounting hole 304 as the reference line, the line connecting the center point of the second deformation sensor and the center point of the end face of the shaft rod is the second line. There is a certain angle between the second line and the reference line, and the angle is usually set to 0°, 45°, 90°, 135°, 180°, 225°, 270° or 315°. Generally, the first deformation sensor 11 and the second deformation sensor are such that one is used to sense the downward force of the foot stepping (the upward bending size of the middle part of the shaft rod), and the other is used to sense the magnitude of the backward pulling force generated by the chain due to the stepping force (the bending size of the middle part of the shaft rod in the direction of the front of the whole vehicle). The first deformation sensor and / or the second deformation sensor is located between the left bearing and the right bearing of the shaft rod.

[0092] In some embodiments, please refer to Figure 16 , Figure 16 is a schematic diagram of the positional relationship between the first deformation sensor and the second deformation sensor on the surface of the shaft rod in the sensor primary component 2 of an embodiment of the present application. As Figure 17 shown in the lower figure in Figure 17 , the first line and the second line are perpendicular. As shown in the upper figure in

[0093] , the first line and the second line are parallel. The first deformation sensor is used to sense the bending deformation of the shaft rod 10 in the up and down direction when the crank is stepped on in the horizontal direction during the process of stepping on the crank. The second deformation sensor is used to sense the bending deformation of the shaft rod 10 in the front and back direction caused by the backward pulling force of the chain when the crank is in the horizontal direction during the riding process. By combining the data sensed by the first deformation sensor and the second deformation sensor, the torque accuracy sensed by the hollow integrated sprocket crank sensor device can be improved and the true stepping riding behavior can be misjudged. When the user steps on the pedal and the chain rotates during riding, a torque signal with a varying stepping force magnitude should be output. When the user steps on the pedals with both feet simultaneously but the chain does not rotate, the torque does not change (there is no true stepping riding), so that the true stepping force data of the rider can be sensed more realistically.

[0093] In one embodiment, two second deformation sensors are used, and these two second deformation sensors are symmetrically arranged with respect to the axis line of the shaft rod. Usually, the two deformation sensors form a full-bridge circuit in the circuit, which can well avoid the interference of temperature and other forces on it, and is beneficial to improving the measurement accuracy of the sensor primary component 2.

[0094] Please refer to Figure 5 , 16, the outer surface of the shaft rod 10 is provided with a mounting plane 104. The mounting plane 104 is used for mounting the first deformation sensor 11 and / or the second deformation sensor. The first deformation sensor 11 and / or the second deformation sensor is / are in contact with the surface of the mounting plane 104, and this surface is the sticking surface. By arranging the mounting plane 104 on the shaft rod 10 to mount the first deformation sensor 11 and / or the second deformation sensor, the structure production of the integrated chainring crank assembly 1 of the shaft rod is more convenient for operation and the structure is more compact.

[0095] According to an embodiment of the present application, the first deformation sensor 11 can also be directly mounted on the outer circular surface of the shaft rod 10, such as Figure 17 shown. That is to say, the sticking surface of the first deformation sensor 11 can be the surface of the shaft rod 10.

[0096] In some embodiments, the secondary control circuit unit further includes a first shielding sheet 221, and the first shielding sheet 221 is arranged between the shaft rod 10 and the secondary coil 16; in some embodiments, a second shielding sheet 222 can also be arranged in the primary control circuit unit, and the second shielding sheet 222 is arranged in the first groove 1807 of the right half shell 1802 outside the primary coil 17. By arranging the first shielding sheet 221 and the second shielding sheet 222, interference signals can be shielded, and the power transmission efficiency between the primary control circuit unit and the secondary control circuit unit can be improved.

[0097] In some embodiments, a heat shrinkable tube 23 is sleeved outside the second shielding sheet 222. After heat shrinking, the heat shrinkable tube 23 is used to protect the second shielding sheet 222 and prevent the second shielding sheet 222 from warping.

[0098] Such as Figure 14 、 8 shown, in some embodiments, the hollow integrated chainring crank sensor device further includes a speed sensor, and the speed sensor includes a speed sensing element 7 and a speed sensed element 6. The speed sensed element 6 is fixedly connected to the shaft rod 10, the speed sensing element 7 is electrically connected to the primary data processing circuit 12, and the speed sensing element 7 and the speed sensed element 6 are arranged opposite to each other in position after being assembled to the whole vehicle.

[0099] The speed sensed element 6 can be a ferromagnetic material body, specifically two semi-circular magnetic rings with several N and S magnetic poles filled on the outer diameter, which are assembled into the magnetic ring groove of the shaft rod and fixed by glue to form a complete magnetic ring. Combining Figure 6 、 8, the speed sensing element 6 is two semicircular magnetic rings uniformly filled with a number of N / S magnetic poles and set in the magnetic ring mounting groove 103 on the surface of the shaft stick 10. The speed sensing element 7 is at least one Hall element, which determines the rotation speed of the shaft stick 10 by measuring the change in the magnetic flux of the speed sensing element 6. There are two Hall elements here, and the two Hall elements can determine the forward and reverse rotation of the shaft stick 10 by the order of the magnetic poles on the surface of the magnetic ring fixed on the shaft stick 10. Here, the speed and direction of the shaft stick 10 are the pedaling frequency data of the foot, and then combined with its torque data, vehicle speed data, etc. to the vehicle control system. The vehicle control system better controls the torque and speed of the motor according to the various riding perception data provided by these sensors to meet the replacement of intelligent riding comfort, that is, the so-called human-vehicle integrated riding experience.

[0100] like Figure 18 As shown, the right bowl component 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 transferred to the inner hole of the right bearing 241. The inner hole of the right bowl component is provided with a right bowl component shell step 3012 and a stop groove 3011.

[0101] Combination Figures 10-13 The right side of the sensor primary component 2 is provided with a second groove 1809 for placing an O-ring, a stop rib 1806 and a limiting step 1805. The O-ring 21 is arranged in the second groove 1809. The right side end of the sensor primary component 2 is assembled into the right bowl 301. The right O-ring 212 is placed on the right side of the right bowl shell step 3012, which is used to fix the sensor primary component 2 to move toward the left bowl component 4. The limiting step 1805 abuts against the left end of the right bowl 301 to limit the rightward displacement of the sensor primary component 2. The stop rib 1806 on the right outer diameter of the sensor primary component 2 is clamped in the stop groove 3011 in the right bowl 301 to limit the rotation of the sensor primary component 2.

[0102] A disassembly hole 1803 for the sensor primary data processing circuit fixing housing 18 is provided on the inner side of the left side of the sensor primary assembly 2 for disassembly of the sensor primary assembly 2 .

[0103] The sensor primary assembly 2 also includes a signal line 26 . The right half shell 1802 is provided with a line outlet hole or a line outlet slot 1811 , and the signal line 26 passes through the line outlet hole or the line outlet slot 1811 .

[0104] like Figure 19As shown, the left bowl component assembly 4 includes a left bowl component 401, a left bearing 242, and a left dust cover 251. The left bearing 242 is assembled in the bearing hole 4011 of the left bowl component 401, and the left dust cover 251 is assembled in the inner hole of the left bearing 242. An O-ring groove is provided on the outer diameter of the left side of the sensor primary component 2, and the left O-ring 211 is arranged in the O-ring groove. After the sensor primary component 2 and the left bowl component assembly 4 are assembled, the left O-ring 211 is placed in the hole of the left bowl component 401.

[0105] In some embodiments, the main core technology can be applied not only to provide a torque sensor device for the common BB bottom bracket structure of an electric bicycle, but also to apply the core technology to the internal torque sensor device of the mid-drive motor of an electric bicycle.

[0106] In addition, the present invention also provides a bicycle, including the hollow integrated chainring crank sensor device as described above. This device has torque sensing and speed detection functions. For the specific structure, refer to the above embodiments. Since the bicycle adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Those skilled in the art can understand that the bicycle described here includes a bicycle driven by human power using pedals, and does not exclude a bicycle assisted by a motor.

[0107] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A hollow integrated chainring crank sensor device, characterized in that, The hollow integrated chainring crank sensor device includes a shaft-stick integrated chainring crank assembly, a sensor primary assembly, a right cup assembly, a left cup assembly, a left crank, and at least one first deformation sensor; The shaft-stick integrated chainring crank assembly includes a shaft stick, a chainring, a right crank, and a secondary control circuit unit; The secondary control circuit unit includes a secondary data processing circuit and a secondary coil and is disposed outside the shaft stick; the first deformation sensor and the secondary coil are electrically connected to the secondary data processing circuit; the first deformation sensor is disposed on the outer surface of the shaft stick; The sensor primary assembly includes a primary data processing circuit fixed housing and a primary control circuit unit; the primary control circuit unit includes 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 electrical energy to the secondary data processing circuit in a wireless manner through the primary coil and the secondary coil; Taking the end face of the shaft stick as a reference plane, taking the connection line between the center point of the shaft stick mounting hole of the crank and the center point of the pedal mounting hole and extending it as a reference line, the connection line between the center point of the attaching surface of the first deformation sensor and the center point of the end face of the shaft stick is a first connection line, and the first connection line is parallel to, perpendicular to, or forms an angle with the reference line; A left bearing is disposed inside the left cup assembly, a right bearing is disposed inside the right cup assembly, the left cup assembly and the right cup assembly are located at both ends of the shaft stick after being assembled to the whole vehicle, and the first deformation sensor is located between the left bearing and the right bearing of the shaft stick.

2. The hollow integrated chainring crank sensor device according to claim 1, wherein The angle between the first connection line and the reference line is 0°, 30°, 45°, 60°, 90°, 135°, 180°, 225°, 270°, 315°.

3. The hollow integrated chainring crank sensor device according to claim 1, characterized in that, The shaft stick is provided with a crank assembly mark, and the crank assembly mark is used to indicate the assembly direction of the crank; 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 integrated chainring crank sensor device according to claim 1, wherein, The hollow integrated chainring crank sensor device further includes at least one second deformation sensor, the connection line between the center point of the attaching surface of the second deformation sensor and the center point of the end face of the shaft stick is a second connection line, and the angle between the second connection line and the reference line is 0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°.

5. The hollow integrated chainring crank sensor device according to claim 4, wherein The second deformation sensor is located between the left bearing and the right bearing of the shaft stick.

6. The hollow integrated chainring crank sensor device according to claim 1, wherein, The number of the first deformation sensors is two, and the two first deformation sensors are symmetrically arranged with respect to the axis line.

7. The hollow integrated chainring crank sensor device according to claim 1, wherein, The outer surface of the shaft stick is provided with a mounting plane, and the mounting plane is used to mount the first deformation sensor.

8. The hollow integrated chainring crank sensor device according to 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 a torque signal to the primary data processing circuit through the secondary coil in a wireless signal manner.

9. The hollow integrated chainring crank sensor device according to claim 1, wherein, 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.

10. The hollow integrated chainring crank sensor device according to claim 1, characterized in that, The shaft and roller integrated chainring crank assembly further includes a secondary protective sleeve with an adjustable diameter. By expanding the secondary protective sleeve, its inner diameter becomes larger and it is sleeved outside the shaft. And an installation cavity is formed between the outer surface of the secondary protective sleeve and the shaft. The secondary data processing circuit, the secondary coil, and the first deformation sensor are located in the installation cavity.

11. The hollow integrated chainring crank sensor device according to claim 1, characterized in that, The sensor primary component further includes a primary protective sleeve that covers the primary data processing circuit and the primary coil.

12. The hollow integrated chainring crank sensor device according to claim 1, wherein, The hollow integrated chainring crank sensor device further includes a shielding sheet disposed between the shaft and the secondary coil.

13. The hollow integrated chainring crank sensor device according to claim 1, characterized in that, 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 housing step and an anti-rotation groove. The outer diameter of the right side of the sensor primary component is provided with a second groove, an anti-rotation rib, and a limit step. A right O-ring is disposed in the second groove. The right side end of the sensor primary component is assembled into the right cup. The right O-ring is placed on the right side of the right cup housing step. The limit step abuts against the left end of the right cup. The anti-rotation rib on the outer diameter of the right side of the sensor primary component is clamped in the anti-rotation groove inside the right cup.

14. The hollow integrated chainring crank sensor device according to claim 1, characterized in that, A disassembly hole is provided on the inner wall of the left side of the sensor primary component for disassembling the sensor primary component.

15. The hollow integrated chainring crank sensor device according to claim 1, characterized in that It further includes a speed sensor. The speed sensor includes a speed sensing element and a speed sensed element. The speed sensed element is a ferromagnetic element. The speed sensing element is included in the sensor primary component and is electrically connected to the primary data processing circuit. The speed sensed element is fixed on the outer surface of the shaft, and the speed sensed element is a part of the shaft and roller integrated chainring crank assembly.

16. The hollow integrated chainring crank sensor device according to claim 15, characterized in that, The speed sensed element is two semi-circular magnetic rings evenly filled with a number of N / S magnetic poles. The semi-circular magnetic rings are sleeved and fixed in the magnetic ring installation groove on the surface of the shaft.

17. The hollow integrated chainring crank sensor device according to claim 1, characterized in that, The fixed housing of the primary data processing circuit 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.

18. The hollow integrated chainring crank sensor device according to claim 17, characterized in that, A hollow signal wire welding 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 arranged with the signal wire welding groove.

19. A bicycle, characterized in that, The bicycle includes the hollow integrated chainring crank sensor device according to any one of claims 1 to 18.

Images