Torque sensor device and power-assisted bicycle

Abstract

A torque sensor device and a power-assisted bicycle, comprising: a five-way assembly (10); a first bearing (20) and a middle shaft (30), wherein the first bearing (20) is arranged in the five-way assembly (10), the middle shaft (30) passes through an inner ring of the first bearing (20), and the middle shaft (30) can rotate relative to the five-way assembly (10) around a rotating axis by means of the first bearing (20); and a pressure sensor (40), wherein the pressure sensor (40) is arranged between an outer ring of the first bearing (20) and the five-way assembly (10) in a radial direction of the middle shaft (30), and the middle shaft (30) can transmit acting force to the pressure sensor (40) by means of the first bearing (20); or the five-way assembly (10) comprises at least two components in the radial direction of the central shaft (30), the pressure sensor (40) is arranged between the two components comprised in the five-way assembly (10) in the radial direction, and the middle shaft (30) can transmit the acting force to the pressure sensor (40) by means of the first bearing (20) and the components. The torque sensor device is connected to a main control circuit in a wired mode, so that the structure is simple, and the production cost is reduced.

Description

Torque sensor device and power-assisted bicycle Technical Field

[0001] The present invention relates to the technical field of bicycles, and in particular to a torque sensor device and a power-assisted bicycle. Background Art

[0002] The power-assisted bicycle is a new type of vehicle that uses a battery as an auxiliary power source, is equipped with a motor, and has a power assist system, which can integrate human riding and motor assistance.

[0003] As the core component of an assisted bicycle, the torque sensor can sense the pedaling torque and cadence of the bicycle in real time, and use this as the input signal of the electric assisted system, so that the system can quickly output electric assisted power that is strictly proportional to the rider's pedaling power, achieving an easy and labor-saving riding experience that "the bike follows your heart".

[0004] In traditional technology, the torque sensor requires the sensing device and its amplification circuit to be installed on the central axis. However, since the central axis is a rotating component, the power supply and output signal of the sensing device circuit need to be connected to the main control circuit wirelessly, resulting in a complex structure and high cost. Summary of the Invention

[0005] Based on this, it is necessary to provide a torque sensor device and a power-assisted bicycle with a simple structure and reduced cost to address the problem that the torque sensor device in the traditional technology has a complex structure and high cost.

[0006] A torque sensor device, comprising:

[0007] bottom bracket assembly;

[0008] a first bearing and a bottom bracket, wherein the first bearing is disposed in the bottom bracket assembly, the bottom bracket is disposed in an inner race of the first bearing, and the bottom bracket can rotate relative to the bottom bracket assembly about a rotation axis via the first bearing;

[0009] A pressure sensor is provided between the outer ring of the first bearing and the five-way assembly in the radial direction of the central shaft, and the central shaft is capable of transmitting a force to the pressure sensor through the first bearing; or, the five-way assembly includes at least two components in the radial direction of the central shaft, and the pressure sensor is provided between two of the components included in the five-way assembly in the radial direction, and the central shaft is capable of transmitting a force to the pressure sensor through the first bearing and the components.

[0010] In one embodiment, the five-way assembly includes a five-way tube, a first sleeve and a casing, the first sleeve is arranged in the five-way tube, the first bearing is installed in the first sleeve, the casing is arranged outside the bottom bracket, and at least a portion of the sleeve is clamped between the first sleeve and the first bearing; the pressure sensor is arranged between the outer ring of the first bearing and the casing.

[0011] In one embodiment, a mounting groove is provided on a side of the sleeve facing the first bearing, and at least a portion of the pressure sensor is accommodated in the mounting groove.

[0012] In one embodiment, the thickness of the pressure sensor is greater than or equal to the width of the gap between the outer ring of the first bearing and the sleeve.

[0013] In one embodiment, the five-way assembly includes a five-way tube, a first sleeve and a casing, the first sleeve is arranged in the five-way tube, the first bearing is installed in the first sleeve, the casing is arranged outside the bottom bracket, and at least a portion of the sleeve is clamped between the first sleeve and the first bearing; the pressure sensor is arranged between the casing and the first sleeve.

[0014] In one embodiment, a mounting groove is provided on at least one of the surfaces of the sleeve and the first sleeve that are close to each other, and at least a portion of the pressure sensor is disposed in the mounting groove.

[0015] In one embodiment, the mounting groove is provided on the surface of the sleeve close to the first sleeve.

[0016] In one embodiment, the mounting groove is provided on the surface of the first sleeve close to the sleeve.

[0017] In one embodiment, the mounting groove is provided on a surface of the sleeve close to the first shaft sleeve and on a surface of the first shaft sleeve close to the sleeve.

[0018] In one embodiment, the thickness of the pressure sensor is greater than or equal to the width of the gap between the sleeve and the first bushing.

[0019] In one embodiment, the torque sensor device further includes a circuit board, and the pressure sensor is electrically connected to the circuit board.

[0020] In one embodiment, the bottom bracket assembly includes a bottom bracket tube, a first sleeve, and a bushing, wherein the first sleeve is disposed in the bottom bracket tube, the first bearing is mounted in the first sleeve, the bushing includes a first tube and a second tube connected in the axial direction, the diameter of the first tube is larger than the diameter of the second tube, and the first tube and the second tube are connected to form a first step, and the first tube is clamped between the first sleeve and the first bearing;

[0021] The circuit board is arranged on the outer circumference of the second tube. One end of the pressure sensor is arranged between the outer ring of the first bearing and the first tube, and the other end passes through the first step portion and is connected to the circuit board.

[0022] In one embodiment, an opening is formed on the first step portion, and the other end of the pressure sensor can pass through the opening to be electrically connected to the circuit board.

[0023] In one embodiment, the sleeve further includes a third tube, the third tube being connected to an end of the second tube away from the first tube, the diameter of the third tube being larger than the diameter of the second tube and forming a second step portion therebetween;

[0024] The sleeve further includes a first baffle and a second baffle, both of which are provided on the second tube and spaced apart in the circumferential direction, and both ends of the first baffle and the second baffle are connected to the first step portion and the second step portion respectively;

[0025] The second tube, the first step portion, the second step portion, the first baffle, the second baffle, and the five-way tube jointly define a receiving cavity, and the circuit board is disposed in the receiving cavity.

[0026] In one embodiment, the torque sensor device further includes a cadence detection component, and the cadence detection component is used to detect the pedaling frequency of the central axis.

[0027] In one embodiment, the pedaling frequency detection component includes a reflector and a photoelectric switch. The reflector is annular and is mounted on the central axis. The photoelectric switch is installed on the five-way assembly. The reflector and the photoelectric switch cooperate to detect the pedaling frequency of the central axis.

[0028] In one embodiment, the torque sensor device further includes a second bearing, which is disposed in the five-way assembly and spaced apart from the first bearing in the axial direction of the middle shaft, and the middle shaft is passed through the second bearing.

[0029] In one embodiment, the bottom bracket assembly includes a bottom bracket tube and a second sleeve, and the second bearing is installed in the bottom bracket tube through the second sleeve.

[0030] A power-assisted bicycle comprises a chainring, a crank, a flywheel, a chain, and a torque sensor device as described above, wherein the chainring and the crank are both connected to the central axis, the chain is arranged on the chainring and the flywheel, and the pressure sensor is arranged between the first bearing and the five-way assembly in a radial direction parallel to the chain, or between components of the five-way assembly.

[0031] In the above-mentioned torque sensor device and power-assisted bicycle, the pressure sensor is not directly attached to the central axis, but is arranged between the first bearing and the five-way assembly, or between two components of the five-way assembly. In this way, the torque sensor device can be connected to the main control circuit in a wired manner, which simplifies the structure and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is an axonometric view of a torque sensor device provided in one embodiment of the present application;

[0033] FIG2 is an axonometric view of the torque sensor device shown in FIG1 from another perspective;

[0034] FIG3 is an exploded view of the torque sensor device shown in FIG1 ;

[0035] FIG4 is a front view of the torque sensor device shown in FIG1 ;

[0036] FIG5 is a cross-sectional view of the torque sensor device shown in FIG4 taken along plane AA;

[0037] FIG6 is a side view of the torque sensor device shown in FIG1 ;

[0038] FIG7 is a cross-sectional view of the torque sensor device shown in FIG6 along the BB plane;

[0039] FIG. 8 is another exploded view of the torque sensor device shown in FIG. 1 .

[0040] Explanation of the accompanying drawings: 100, torque sensor device; 10, five-way assembly; 11, first sleeve; 12, second sleeve; 13, sleeve; 131, first tube; 132, second tube; 133, third tube; 134, first step portion; 1341, opening; 135, second step portion; 136, first baffle; 137, second baffle; 14, mounting groove; 15, receiving chamber; 20, first bearing; 30, middle shaft; 40, pressure sensor; 50, second bearing; 60, circuit board; 71, reflector; 72, photoelectric switch. DETAILED DESCRIPTION

[0041] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0047] One embodiment of the present application provides a power-assisted bicycle comprising a torque sensor device 100, a chainring, a crank, a flywheel, and a chain. Referring to Figures 1-3 , the torque sensor device 100 comprises a bottom bracket assembly 10, a first bearing 20, and a center axle 30. The first bearing 20 is disposed within the bottom bracket assembly 10. The center axle 30 is disposed within the first bearing 20 and is connected to the inner ring of the first bearing 20. The center axle 30 is rotatable relative to the bottom bracket assembly 10 about a rotation axis via the first bearing 20. The chainring and crank are both connected to the center axle 30, and the chain is disposed on the chainring and flywheel.

[0048] With the above arrangement, the rider's pedaling torque tightens the chain between the chainring and the flywheel through the crank, causing the middle shaft 30 to form a force component and displacement in a direction parallel to the chain. The torque sensor of the power-assisted bicycle detects the pedaling torque and pedaling frequency as input signals for the electric power-assisted system, enabling the system to quickly output electric power proportional to the rider's pedaling power, achieving the purpose of ease and effort.

[0049] Furthermore, referring to Figures 4-7, the torque sensor device 100 also includes a pressure sensor 40, which is located between the outer ring of the first bearing 20 and the bottom bracket assembly 10 in a radial direction of the bottom bracket 30. Specifically, the pressure sensor 40 is located between the first bearing 20 and the bottom bracket assembly 10 in a radial direction parallel to the chain. The rider's pedaling torque tensions the chain between the crankset and the flywheel via the crank, causing the bottom bracket 30 to experience a force component and displacement parallel to the chain. The bottom bracket 30 can transmit the force to the pressure sensor 40 via the first bearing 20, thereby enabling the pressure sensor 40 to detect the rider's pedaling torque as an input signal, enabling the system to rapidly output an electric power assist that is strictly proportional to the rider's pedaling power, thereby achieving the goal of effortless riding. Alternatively, the bottom bracket assembly 10 includes at least two components in a radial direction of the bottom bracket 30, and the pressure sensor 40 is located radially between two of the components of the bottom bracket assembly 10. Specifically, the pressure sensor 40 is positioned between two components of the bottom bracket assembly 10, radially parallel to the chain. The rider's pedaling torque, through the crank, tightens the chain between the chainring and flywheel, causing a force component and displacement on the bottom bracket 30 parallel to the chain. The bottom bracket 30 transmits the force to the pressure sensor 40 via the first bearing 20 and components of the bottom bracket assembly 10. This force is then detected by the pressure sensor 40 as an input signal, enabling the system to rapidly output an electric assist power strictly proportional to the rider's pedaling power, achieving effortless and effortless riding.

[0050] In the power-assisted bicycle provided in the embodiment of the present application, the pressure sensor 40 is not directly attached to the bottom bracket 30, but is arranged between the first bearing 20 and the five-way assembly 10, or between two components of the five-way assembly 10. In this way, the torque sensor device 100 can be connected to the main control circuit in a wired manner, which simplifies the structure and reduces production costs.

[0051] In some embodiments, referring again to Figures 3 and 7 , the torque sensor device 100 further includes a second bearing 50. The second bearing 50 is disposed within the bottom bracket assembly 10 and spaced apart from the first bearing 20 in the axial direction of the center shaft 30. The center shaft 30 passes through the second bearing 50. Thus, the center shaft 30 rotates relative to the bottom bracket assembly 10 via the first bearing 20 and the second bearing 50. The first bearing 20 and the second bearing 50 jointly support the center shaft 30, ensuring smooth rotation of the center shaft 30.

[0052] Continuing to refer to Figures 2 and 7, the five-way assembly 10 includes a five-way tube, a first sleeve 11, a second sleeve 12 and a sleeve 13. The first sleeve 11 and the second sleeve 12 are both arranged in the five-way tube, and the second bearing 50 is arranged in the second sleeve 12. The sleeve 13 is sleeved on the outside of the middle shaft 30, and is at least partially arranged between the first bearing 20 and the first sleeve 11 in the radial direction of the middle shaft 30. Specifically, the sleeve 13 is a plastic part. The first sleeve 11 and the second sleeve 12 respectively play the role of supporting the first bearing 20 and the second bearing 50, and the arrangement of the sleeve 13 facilitates the installation of the pressure sensor 40. It is conceivable that in some other embodiments, the five-way assembly 10 can also omit the first sleeve 11, the second sleeve 12 and the sleeve 13, which is not limited here.

[0053] In some embodiments, the pressure sensor 40 is positioned between the outer ring of the first bearing 20 and the sleeve 13. This allows the bottom bracket 30 to transmit force to the pressure sensor 40 via the first bearing 20. In other embodiments, the pressure sensor 40 is positioned between the sleeve 13 and the first sleeve 11. In this case, the bottom bracket 30 transmits force to the pressure sensor 40 via the first bearing 20 and the sleeve 13. It is contemplated that in other embodiments, when the bottom bracket assembly 10 includes other components, the pressure sensor 40 may also be positioned between the other components and the sleeve 13. The pressure sensor 40 can be positioned in any location that can receive force transmitted from the bottom bracket 30.

[0054] It should be noted that when the pressure sensor 40 is installed between the outer ring of the first bearing 20 and the sleeve 13, the thickness of the pressure sensor 40 can be set to be exactly equal to or slightly larger than the width of the gap between the outer ring of the first bearing 20 and the sleeve 13. In this case, because the gap between the first bearing 20 and the sleeve 13 is filled by the pressure sensor 40, the bottom bracket 30 will not cause the first bearing 20 to move radially when the rider rides. It is contemplated that in other embodiments, when the pressure sensor 40 is installed between the outer ring of the first bearing 20 and the sleeve 13, the thickness of the pressure sensor 40 can be set to be smaller than the width of the gap between the outer ring of the first bearing 20 and the sleeve 13. In this case, because the width of the gap between the first bearing 20 and the sleeve 13 is greater than the thickness of the pressure sensor 40, the bottom bracket 30 will cause the first bearing 20 to move slightly radially when the rider rides. When the pressure sensor 40 is arranged between the sleeve 13 and the first sleeve 11, the thickness of the pressure sensor 40 can be slightly larger than the width of the gap between the sleeve 13 and the first sleeve 11, or can be equal to the width of the gap between the sleeve 13 and the first sleeve 11, or can be smaller than the width of the gap between the sleeve 13 and the first bearing 20, which is not limited here.

[0055] Further, referring to Figure 3 , a mounting groove 14 is provided on the side of the sleeve 13 facing the first bearing 20, and at least a portion of the pressure sensor 40 is accommodated in the mounting groove 14. Alternatively, a mounting groove 14 is provided on at least one of the surfaces of the sleeve 13 and the first sleeve 11 that are close to each other, and at least a portion of the pressure sensor 40 is disposed in the mounting groove 14. In some specific embodiments, a mounting groove 14 is provided on the surface of the sleeve 13 close to the first sleeve 11. In other specific embodiments, a mounting groove 14 is provided on the surface of the first sleeve 11 close to the sleeve 13. In still other specific embodiments, a mounting groove 14 is provided on both the surface of the sleeve 13 close to the first sleeve 11 and the surface of the first sleeve 11 close to the sleeve 13. In this way, the assembly of the pressure sensor 40 is facilitated.

[0056] Continuing with Figure 7, the torque sensor device 100 also includes a circuit board 60, to which the pressure sensor 40 is electrically connected. The pressure sensor 40 detects pedaling torque and transmits a signal to the circuit board 60 through changes in its resistance. The signal is then converted by the circuit board 60 into a voltage signal that is transmitted to the controller. The power-assisted bicycle's motor then outputs power proportional to the pedaling torque.

[0057] The sleeve 13 includes a first tube 131 and a second tube 132, which are connected axially. The diameter of the first tube 131 is larger than that of the second tube 132, and the two tubes are connected to form a first step 134. The first tube 131 is clamped between the first sleeve 11 and the first bearing 20. The circuit board 60 is mounted on the outer circumference of the second tube 132. One end of the pressure sensor 40 is positioned between the outer ring of the first bearing 20 and the first tube 131, and the other end passes through the first step 134 and connects to the circuit board 60. This facilitates the installation of the pressure sensor 40 and the circuit board 60.

[0058] Furthermore, referring to Figures 7 and 8 , the sleeve 13 also includes a third tube 133, which is connected to the end of the second tube 132 away from the first tube 131. The diameter of the third tube 133 is larger than that of the second tube 132, and a second step 135 is formed between the third tube 133 and the second tube 132. The end of the third tube 133 away from the second tube 132 extends into the second sleeve 12. The sleeve 13 also includes a first baffle 136 and a second baffle 137. Both the first baffle 136 and the second baffle 137 are circumferentially spaced apart on the second tube 132, and their ends are connected to the first step 134 and the second step 135, respectively. The second tube 132, the first step 134, the second step 135, the first baffle 136, the second baffle 137, and the five-way pipe collectively define a receiving chamber 15, in which the circuit board 60 is disposed. This arrangement, on the one hand, facilitates the installation of the circuit board 60 ; on the other hand, the circuit board 60 is arranged in the receiving cavity 15 , which can better protect the circuit board 60 .

[0059] Specifically, an opening 1341 is formed on the first step portion 134 , one end of the pressure sensor 40 is located in the first tube 131 , and the other end can pass through the opening 1341 and extend into the accommodating cavity 15 to be electrically connected to the circuit board 60 .

[0060] In some embodiments, the torque sensor device 100 further includes a cadence detector electrically connected to the circuit board 60. The cadence detector is used to detect the pedaling frequency of the axle 30 and send a signal to the circuit board 60. The circuit board 60 processes the signal and sends it to the controller. The motor of the power-assisted bicycle can then output a corresponding frequency, providing power in proportion to the pedaling frequency.

[0061] 7 , the pedaling frequency detection component includes a reflector 71 and a photoelectric switch 72. The reflector 71 is annularly sleeved on the central axis 30. The photoelectric switch 72 is mounted on the second tube 132 and located in the receiving cavity 15. The photoelectric switch 72 can emit light toward the reflector 71 through the opening 1341. The reflector 71 and the photoelectric switch 72 cooperate to detect the pedaling frequency of the central axis 30. The photoelectric switch 72 can emit light, and the reflector 71 can rotate along with the rotation of the central axis 30. The reflector 71 can reflect the light emitted by the photoelectric switch 72 while following the rotation of the central axis 30. The photoelectric switch 72 can obtain the pedaling frequency of the central axis 30 based on the reflection of the reflector 71, and send a signal to the circuit board 60. The circuit board 60 processes the signal and sends it to the controller. The motor of the power-assisted bicycle can output a corresponding frequency, which is proportional to the pedaling frequency and provides power.

[0062] It is conceivable that in other embodiments, the pedaling detection member may be provided in other ways, as long as the purpose of detecting the pedaling frequency of the central axis 30 can be achieved.

[0063] Another embodiment of the present application further provides a torque sensor device 100 included in the above-mentioned power-assisted bicycle. Since the above-mentioned power-assisted bicycle has beneficial effects, the torque sensor device 100 has the same beneficial effects, which will not be described in detail here.

[0064] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A torque sensor device, characterized in that, Comprising: A five-way component (10); A first bearing (20) and a bottom bracket spindle (30), the first bearing (20) being disposed within the five-way component (10), the bottom bracket spindle (30) passing through the inner ring of the first bearing (20), and the bottom bracket spindle (30) being capable of rotating relative to the five-way component (10) about a rotation axis through the first bearing (20); A pressure sensor (40), the pressure sensor (40) being disposed radially between the outer ring of the first bearing (20) and the five-way component (10), and the bottom bracket spindle (30) being capable of transmitting a force to the pressure sensor (40) through the first bearing (20); alternatively, the five-way component (10) includes at least two components in the radial direction of the bottom bracket spindle (30), the pressure sensor (40) being disposed radially between two of the components included in the five-way component (10), and the bottom bracket spindle (30) being capable of transmitting a force to the pressure sensor (40) through the first bearing (20) and the components.

2. The torque sensor device according to claim 1, characterized in that, The five-way component (10) includes a five-way pipe, a first bushing (11), and a sleeve (13), the first bushing (11) being disposed within the five-way pipe, the first bearing (20) being installed within the first bushing (11), the sleeve (13) being sleeved outside the bottom bracket spindle (30), and at least a portion of the sleeve (13) being clamped between the first bushing (11) and the first bearing (20); the pressure sensor (40) is disposed between the outer ring of the first bearing (20) and the sleeve (13).

3. The torque sensor device according to claim 2, characterized in that The side of the sleeve (13) facing the first bearing (20) is provided with a mounting groove (14), and at least a portion of the pressure sensor (40) is received within the mounting groove (14).

4. The torque sensor device according to claim 2, characterized in that, The thickness of the pressure sensor (40) is greater than or equal to the width of the gap between the outer ring of the first bearing (20) and the sleeve (13).

5. The torque sensor device according to claim 1, characterized in that The five-way component (10) includes a five-way pipe, a first bushing (11), and a sleeve (13), the first bushing (11) being disposed within the five-way pipe, the first bearing (20) being installed within the first bushing (11), the sleeve (13) being sleeved outside the bottom bracket spindle (30), and at least a portion of the sleeve (13) being clamped between the first bushing (11) and the first bearing (20); the pressure sensor (40) is disposed between the sleeve (13) and the first bushing (11).

6. The torque sensor device according to claim 5, characterized in that, At least one of the surfaces of the sleeve (13) and the first bushing (11) that face each other is provided with a mounting groove (14), and at least a portion of the pressure sensor (40) is disposed within the mounting groove (14).

7. The torque sensor device according to claim 6, characterized in that, The surface of the sleeve (13) adjacent to the first bushing (11) is provided with the mounting groove (14).

8. The torque sensor device according to claim 6, characterized in that, The surface of the first bushing (11) adjacent to the sleeve (13) is provided with the mounting groove (14).

9. The torque sensor device according to claim 6, characterized in that, The mounting grooves (14) are provided on the surface of the sleeve (13) close to the first bushing (11) and on the surface of the first bushing (11) close to the sleeve (13).

10. The torque sensor device according to claim 5, characterized in that, The thickness of the pressure sensor (40) is greater than or equal to the width of the gap between the sleeve (13) and the first bushing (11).

11. The torque sensor device according to claim 1, wherein The torque sensor device further includes a circuit board (60), and the pressure sensor (40) is electrically connected to the circuit board (60).

12. The torque sensor device according to claim 11, characterized in that, The five-way assembly (10) includes a five-way pipe, a first bushing (11) and a sleeve (13). The first bushing (11) is arranged inside the five-way pipe. The first bearing (20) is installed inside the first bushing (11). The sleeve (13) includes a first pipe (131) and a second pipe (132) connected axially. The diameter of the first pipe (131) is greater than that of the second pipe (132), and the two are connected to form a first stepped portion (134). The first pipe (131) is clamped between the first bushing (11) and the first bearing (20). The circuit board (60) is arranged on the outer peripheral surface of the second pipe (132). One end of the pressure sensor (40) is arranged between the outer ring of the first bearing (20) and the first pipe (131), and the other end passes through the first stepped portion (134) and is connected to the circuit board (60).

13. The torque sensor device according to claim 12, characterized in that, An opening (1341) is formed on the first stepped portion (134), and the other end of the pressure sensor (40) can pass through the opening (1341) to be electrically connected to the circuit board (60).

14. The torque sensor device according to claim 12, characterized in that, The sleeve (13) further includes a third pipe (133). The third pipe (133) is connected to one end of the second pipe (132) far from the first pipe (131). The diameter of the third pipe (133) is greater than that of the second pipe (132), and a second stepped portion (135) is formed between the two. The sleeve (13) further includes a first baffle (136) and a second baffle (137). The first baffle (136) and the second baffle (137) are both arranged on the second pipe (132) and are spaced circumferentially. The two ends of the first baffle (136) and the second baffle (137) are respectively connected to the first stepped portion (134) and the second stepped portion (135). The second pipe (132), the first stepped portion (134), the second stepped portion (135), the first baffle (136), the second baffle (137) and the five-way pipe jointly define a receiving cavity (15), and the circuit board (60) is arranged in the receiving cavity (15).

15. The torque sensor device according to claim 1, characterized in that, The torque sensor device further includes a cadence detection component for detecting the pedaling frequency of the bottom bracket (30).

16. The torque sensor device according to claim 15, characterized in that, The cadence detection component includes a reflector (71) and a photoelectric switch (72). The reflector (71) is annular and sleeved on the bottom bracket (30). The photoelectric switch (72) is installed on the five-way assembly (10). The reflector (71) and the photoelectric switch (72) cooperate to detect the pedaling frequency of the bottom bracket (30).

17. The torque sensor device according to claim 1, characterized in that, The torque sensor device further includes a second bearing (50). The second bearing (50) is disposed within the bottom bracket assembly (10) and is arranged at an axial interval from the first bearing (20) along the axis of the central shaft (30). The central shaft (30) passes through the second bearing (50).

18. The torque sensor device according to claim 17, characterized in that, The bottom bracket assembly (10) includes a bottom bracket tube and a second bushing (12). The second bearing (50) is installed within the bottom bracket tube through the second bushing (12).

19. A power-assisted bicycle, characterized in that, It includes a chainring, a crank, a freewheel, a chain, and the torque sensor device according to any one of claims 1-18. The chainring and the crank are both connected to the central shaft (30). The chain is disposed on the chainring and the freewheel. The pressure sensor (40) is disposed between the first bearing (20) and the bottom bracket assembly (10) in a radial direction parallel to the chain, or between components of the bottom bracket assembly (10).

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