Built-in torque power meter for rear hub of bicycle

Abstract

The utility model relates to a bicycle rear hub built-in torque power meter, and belongs to the field of bicycles. The utility model discloses a rear hub, ratchet piece, tower footing, bearing A, bearing B, magnetic attraction charging seat, soft package lithium battery, antenna, the ratchet piece is fixed with the tower footing, its structure is characterized in that: also include: elastic body, moment adapter, circuit board and resistance strain gauge, the elastic body both ends are fixed end and free end respectively, the bearing B is equipped with the bearing A, the bearing B, magnetic attraction charging seat, soft package lithium battery, resistance strain gauge. A deformation area is arranged between the fixed end and the free end, the inner wall of the rear hub is in key connection with the fixed end, the free end is in threaded connection with the torque adapter, the torque adapter is matched with the ratchet piece, the resistance strain gauge is pasted to the deformation area, the resistance strain gauge is in signal connection with the circuit board, and the circuit board is in signal connection with the antenna. The antenna is in Bluetooth connection with the stopwatch, the first bearing is installed on the inner wall of the rear hub, the second bearing is installed on the inner wall of the ratchet piece, the magnetic attraction charging base is electrically connected with the circuit board, and the circuit board is electrically connected with the soft package lithium battery.

Description

Technical Field

[0001] This utility model relates to a torque power meter built into the rear hub of a bicycle, belonging to the field of bicycles. Background Technology

[0002] A bicycle power meter is a device that measures the output power of a rider. It is usually installed on the bottom bracket of a bicycle. During normal operation, the power meter transmits the power to the bicycle speedometer via wireless signals for display or storage. In view of this, a bicycle bottom bracket shaft-type power meter is disclosed in patent document CN202410416049.9. The power meter in the aforementioned prior art is installed on the bottom bracket shaft. Since the wiring is adjusted before leaving the factory, when the power meter is damaged and needs repair, the entire bicycle bottom bracket needs to be disassembled and rewired, making installation inconvenient. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a reasonably designed torque power meter that is built into the rear hub of a bicycle.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: the bicycle rear hub-integrated torque power meter includes a rear hub, a ratchet plate, and a freehub base. The ratchet plate is fixed to the freehub base. Its structural features are: it also includes an elastic body, a torque adapter, a circuit board, and a resistance strain gauge. The two ends of the elastic body are a fixed end and a free end, respectively. The area between the fixed end and the free end is a deformation zone. The inner wall of the rear hub is keyed to the fixed end. The free end is threaded to the torque adapter. The torque adapter cooperates with the ratchet plate. The resistance strain gauge is pasted in the deformation zone. The resistance strain gauge is connected to the circuit board for signal transmission.

[0005] Furthermore, it also includes bearing A and bearing B, wherein bearing A is installed on the inner wall of the rear hub and bearing B is installed on the inner wall of the ratchet plate.

[0006] Furthermore, it also includes a magnetic charging base and a soft-pack lithium battery, wherein the magnetic charging base is electrically connected to a circuit board and the circuit board is electrically connected to the soft-pack lithium battery.

[0007] Furthermore, it also includes an antenna, the circuit board is connected to the antenna signal, and the antenna is connected to the speedometer via Bluetooth.

[0008] Furthermore, a waterproof ring is installed between the inner wall of the rear hub and the outer wall of the torque adapter.

[0009] Furthermore, the magnetic charging base is located on the side wall of the rear hub, and the soft-pack lithium battery and circuit board are both located inside the rear hub.

[0010] Compared with the prior art, this utility model has the following advantages: the torque power meter is hidden inside the rear hub of the bicycle, and the rear wheel is mounted on the rear fork of the bicycle through the rear axle. When the power meter is damaged, the rear wheel can be directly removed and the entire rear wheel can be replaced without rewiring, which is convenient for disassembly and installation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the torque and power meter built into the rear hub of a bicycle, according to an embodiment of this utility model.

[0012] In the diagram: 1. Bearing A, 2. Rear hub, 3. Elastomer, 4. Magnetic charging base, 5. Torque adapter, 6. Ratchet, 7. Antenna, 8. Soft-pack lithium battery, 9. Circuit board, 10. Bearing B, 11. Waterproof ring, 12. Tower base, 13. Resistance strain gauge. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0014] Example

[0015] See Figure 1 As shown in the accompanying drawings, the structures, proportions, sizes, etc., depicted in this specification are merely for illustrative purposes to aid those skilled in the art and to provide a clear understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the use of terms such as "upper," "lower," "left," "right," "middle," and "one" in this specification is solely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0016] The bicycle rear hub-embedded torque power meter in this embodiment includes bearing A 1, rear hub 2, elastomer 3, magnetic charging base 4, torque adapter 5, ratchet plate 6, antenna 7, soft-pack lithium battery 8, circuit board 9, bearing B 10, base 12, and resistance strain gauge 13.

[0017] In this embodiment, the two ends of the elastomer 3 are a fixed end and a free end, respectively, and the area between the fixed end and the free end is a deformation zone. The inner wall of the rear hub 2 is keyed to the fixed end, and the free end is threaded to the torque adapter 5. The torque adapter 5 is engaged with the ratchet plate 6, and the ratchet plate 6 is fixed to the base 12. The resistance strain gauge 13 is pasted in the deformation zone.

[0018] In this embodiment, the resistance strain gauge 13 is connected to the circuit board 9, the circuit board 9 is connected to the antenna 7 via signal, the antenna 7 is connected to the speedometer via Bluetooth, the bearing A 1 is installed on the inner wall of the rear hub 2, the bearing B 10 is installed on the inner wall of the ratchet plate 6, the magnetic charging base 4 is connected to the circuit board 9, and the circuit board 9 is electrically connected to the soft-pack lithium battery 8.

[0019] In this embodiment, a waterproof ring 11 is installed between the inner wall of the rear hub 2 and the outer wall of the torque adapter 5. The magnetic charging base 4 is set on the side wall of the rear hub 2. The soft-pack lithium battery 8 and the circuit board 9 are both set inside the rear hub 2.

[0020] Specifically, the torque power meter can be completely concealed and installed inside the rear hub 2. The rear hub 2 is connected to the rear wheel via spokes. It passes through the rear axle inside bearing A 1 and bearing B 10. The rear axle is installed on the bicycle rear fork. The magnetic charging base 4 can charge the soft-pack lithium battery 8, and the soft-pack lithium battery 8 can power the torque power meter. The torque adapter 5 can be easily replaced by threading it to the free end, allowing for easy replacement of the ratchet 6 and freehub base 12.

[0021] Since the torque adapter 5 is connected to the base 12 via the ratchet plate 6, unidirectional drive can be achieved. When the base 12 is driven to rotate forward by the chain, the base 12, the ratchet plate 6, and the torque adapter 5 will cause the elastic body 3 to deform, which in turn causes the resistance strain gauge 13 attached to the deformation area of ​​the elastic body 3 to deform. The measuring circuit composed of the resistance strain gauge 13 attached to the deformation area senses and detects the magnitude signal of the torque, and then converts it into an electrical signal and outputs it to the speedometer through the antenna 7. The antenna signal interacts with the vehicle speedometer through Bluetooth wireless transmission. When the base 12 is driven to rotate in the reverse direction by the chain, a sound will be emitted.

[0022] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model are included within the protection scope of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined by the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A torque power meter embedded in the rear hub of a bicycle, comprising a rear hub (2), a ratchet (6), and a freehub base (12), wherein the ratchet (6) is fixed to the freehub base (12), characterized in that: It also includes an elastomer (3), a torque adapter (5), a circuit board (9), and a resistance strain gauge (13). The two ends of the elastomer (3) are a fixed end and a free end, respectively. The area between the fixed end and the free end is a deformation zone. The inner wall of the rear hub (2) is keyed to the fixed end. The free end is threaded to the torque adapter (5). The torque adapter (5) is engaged with a ratchet plate (6). The resistance strain gauge (13) is pasted in the deformation zone. The resistance strain gauge (13) is signal connected to the circuit board (9).

2. The hub dynamometer as defined in claim 1, wherein: It also includes bearing A (1) and bearing B (10), bearing A (1) being installed on the inner wall of the rear hub (2) and bearing B (10) being installed on the inner wall of the ratchet plate (6).

3. The hub dynamometer as defined in claim 1, wherein: It also includes a magnetic charging base (4) and a soft-pack lithium battery (8), wherein the magnetic charging base (4) is electrically connected to a circuit board (9) and the circuit board (9) is electrically connected to the soft-pack lithium battery (8).

4. The hub dynamometer as defined in claim 1 wherein: It also includes an antenna (7), the circuit board (9) is signal-connected to the antenna (7), and the antenna (7) is connected to the code watch via Bluetooth.

5. The hub dynamometer as defined in claim 1 wherein: A waterproof ring (11) is installed between the inner wall of the rear hub (2) and the outer wall of the torque adapter (5).

6. The hub dynamometer as defined in claim 3 wherein: The magnetic charging base (4) is located on the side wall of the rear hub (2), and the soft-pack lithium battery (8) and circuit board (9) are both located inside the rear hub (2).

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