Fitness bicycle capable of efficiently adjusting resistance

Abstract

The utility model relates to the technical field of fitness equipment, in particular to an efficient resistance adjusting fitness bicycle which comprises a bicycle support and a pedal mechanism arranged on the bicycle support. The bicycle further comprises a speed reducing mechanism and a resistance motor, the speed reducing mechanism comprises a worm gear and a worm which are rotationally arranged on the bicycle support, the worm gear is meshed with the worm, the pedal mechanism is connected with the worm gear, the resistance motor is provided with a stator unit and a rotor unit, the rotor unit of the resistance motor is connected with the worm, and the pedal mechanism drives the worm to rotate through the worm gear. The worm drives a rotor unit of the resistance motor to rotate relative to a stator unit, and the stator unit is used for cutting magnetic lines for power generation; electric energy generated by the resistance motor or an external power source is used for supplying power to the resistance motor so that the resistance motor can be switched into a motor mode, and the resistance motor in the motor mode is used for driving the worm to rotate to achieve speed reduction and torque increasing of the worm gear so that the pedal mechanism can generate resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic bicycles, and in particular discloses a fitness bicycle with high-efficiency resistance adjustment. Background Art

[0002] Existing spinning bikes are mainly used as fitness equipment. Although they can provide users with an effective way to exercise, they fail to fully utilize the mechanical energy generated during exercise. In traditional spinning bikes, kinetic energy is consumed through friction resistance adjustment, and there is no actual power recovery and utilization function. At the same time, existing spinning bikes are relatively cumbersome in adjusting the riding resistance, which makes it inconvenient to achieve the power output requirements in different riding scenarios. The worm gear reduction mechanism has a high reduction ratio and torque-increasing capacity in the mechanical system. Combined with motor drive technology, it can effectively solve the problem of insufficient torque output in the above-mentioned spinning bikes, while realizing kinetic energy recovery and power output. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a fitness bicycle with convenient resistance adjustment to solve the above technical problems.

[0004] To achieve the above objectives, the present invention provides a fitness bicycle with efficient resistance adjustment, comprising a bicycle frame and a pedal mechanism rotatably mounted on the bicycle frame; a reduction mechanism and a resistance motor, wherein the reduction mechanism comprises a worm wheel and a worm rotatably mounted on the bicycle frame, the worm wheel meshing with the worm, the pedal mechanism connected to the worm wheel, the resistance motor comprising a stator unit and a rotor unit, the rotor unit of the resistance motor being connected to the worm, the pedal mechanism driving the worm to rotate via the worm wheel, the worm driving the rotor unit of the resistance motor to rotate relative to the stator unit, and the stator unit being used to cut magnetic lines of force to generate electricity;

[0005] The bicycle frame is provided with a storage module, and the electric energy generated by the resistance motor is stored through the storage module. The electric energy stored in the storage module or the external power supply is used to power the resistance motor so that it switches to the motor mode. The resistance motor in the motor mode is used to drive the worm to rotate to achieve deceleration and torque increase of the worm wheel so that the pedal mechanism generates resistance.

[0006] Furthermore, the fitness bicycle also includes a control system and a torque sensor used therewith. The torque sensor is arranged on the worm gear. The torque sensor is used to monitor the magnitude of the torque output by the worm gear in real time and feed it back to the control system. The control system is used to adjust the magnitude of the current output by the resistance motor according to the magnitude of the torque and thereby adjust the speed of the worm gear.

[0007] Furthermore, the rotor unit includes an iron core connected to the worm and a coil winding arranged on the iron core, and the stator unit includes a stator shell fixedly mounted on the bicycle frame, and a magnetic part is provided in the stator shell; the pedal mechanism drives the worm to rotate via the worm gear, and the rotating worm drives the coil winding to rotate relative to the magnetic part of the stator shell to generate electricity.

[0008] Furthermore, the pedal mechanism includes a rotating shaft connected to the worm gear, two transmission brackets arranged at both ends of the rotating shaft, and pedals arranged on the transmission brackets.

[0009] Furthermore, the bicycle frame is detachably connected to a load bracket, the resistance motor and the speed reduction mechanism are both arranged on the load bracket, and the rotating shaft is rotatably arranged on the load bracket and connected to the worm gear.

[0010] Furthermore, the reduction mechanism also includes a first housing having a housing cavity for accommodating a worm wheel and a worm. The rotating shaft and the worm are both rotatably arranged in the first housing via bearings, and the rotating shaft and the worm are arranged crosswise with each other.

[0011] Furthermore, the resistance motor has a second cover shell which covers the stator unit and the rotor unit, and the second cover shell is detachably connected to the first cover shell.

[0012] Furthermore, the bicycle rack includes a carrier frame arranged in an "I"-shaped structure, a first bracket and a second bracket arranged on the carrier frame, the first bracket is provided with a seat cushion at one end away from the carrier frame, and the second bracket is provided with a handle at one end away from the carrier frame.

[0013] Furthermore, the seat cushion is provided with a first telescopic rod, the handle is provided with a second telescopic rod, the first bracket and the second bracket are respectively provided with a first accommodating cavity and a second accommodating cavity, the first telescopic rod and the second telescopic rod are telescopically arranged in the first accommodating cavity and the second accommodating cavity, and the first bracket and the second bracket are respectively provided with a first knob and a second knob for adjusting the telescopic length of the first telescopic rod and the second telescopic rod.

[0014] Furthermore, the resistance adjustment unit includes a touch screen arranged on the supporting frame and connected to the control system. The rider inputs instructions to the control system through the touch screen, and the control system adjusts the current output by the storage module or external power supply to the resistance motor.

[0015] Furthermore, the worm wheel is provided with a plurality of helical gears, the tooth surfaces of the helical gears and the plane where the rotation axis of the worm wheel is located are arranged to intersect with each other, and the worm is provided with helical teeth meshing with the helical gears.

[0016] The beneficial effects of this utility model are as follows: The core operating principle of this fitness bike is that the pedal mechanism drives the worm gear to rotate, which in turn drives the meshing worm, thereby driving the rotor unit of the resistance motor to rotate relative to the stator unit, cutting magnetic lines of force to generate electrical energy. The generated electrical energy is stored in the power storage module and used to power the resistance motor. When switched to motor mode, the resistance motor drives the worm to rotate in the opposite direction, thereby reducing speed and increasing torque through the worm gear, ultimately generating resistance in the pedal mechanism.

[0017] The worm gear and worm's torque-increasing function maximizes pedaling resistance even with a low-power resistance motor, adapting to varying fitness intensities. The resistance motor's ability to switch between power generation and electric modes allows for energy recovery during exercise, improving energy efficiency. It also enables electric resistance adjustment, simplifying the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the fitness bicycle of the present utility model;

[0019] Figure 2 This is a schematic diagram of the partial exploded structure of the fitness bicycle of the present invention;

[0020] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A;

[0021] Figure 4 This is a schematic structural diagram of the first cover of the present utility model;

[0022] Figure 5 It is a schematic cross-sectional view of the resistance motor and the speed reduction mechanism of the present invention.

[0023] Reference numerals include:

[0024] 1. Bicycle frame; 2. Pedal mechanism; 3. Speed ​​reduction mechanism; 4. Resistance motor; 5. Load bracket; 6. Touch screen; 11. Carrying frame; 12. First bracket; 120. First telescopic rod; 121. Seat; 122. First knob; 13. Second bracket; 130. Second telescopic rod; 131. Handle; 132. Second knob; 21. Rotating shaft; 22. Transmission bracket; 23. Pedal; 31. Worm gear; 311. Helical gear; 32. Worm; 321. Helical teeth; 33. First cover; 331. Accommodating chamber; 41. Stator unit; 42. Rotor unit; 411. Stator housing; 412. Magnetic part. DETAILED DESCRIPTION

[0025] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0026] See also Figures 1 to 5 As shown, the utility model is a fitness bicycle with efficient resistance adjustment, comprising a bicycle frame 1 and a pedal mechanism 2 rotatably arranged on the bicycle frame 1; further comprising a reduction mechanism 3 and a resistance motor 4, wherein the reduction mechanism 3 comprises a worm wheel 31 and a worm 32 rotatably arranged on the bicycle frame 1, wherein the worm wheel 31 is engaged with the worm 32, the pedal mechanism 2 is connected to the worm wheel 31, and the resistance motor 4 comprises a stator unit 41 and a rotor unit 42, wherein the rotor unit 42 of the resistance motor 4 is connected to the worm 32, the pedal mechanism 2 drives the worm 32 to rotate via the worm wheel 31, and the worm 32 drives the rotor unit 42 of the resistance motor 4 to rotate relative to the stator unit 41, and the stator unit 41 is used to cut magnetic lines of force to generate electricity;

[0027] The bicycle frame 1 is provided with a storage module, and the electric energy generated by the resistance motor 4 is stored via the storage module. The electric energy stored in the storage module or the external power supply is used to power the resistance motor 4 so that it switches to the motor mode. The resistance motor 4 in the motor mode is used to drive the worm 32 to rotate to achieve deceleration and torque increase of the worm wheel 31 so that the pedal mechanism 2 generates resistance.

[0028] This fitness bicycle with efficient resistance adjustment consists of a bicycle frame 1, a pedal mechanism 2, a reduction mechanism 3 and a resistance motor 4. In actual use: the pedal mechanism 2 is connected to the worm gear 31 through the rotating shaft 21. When pedaling, the worm gear 31 is driven to rotate. The worm gear 31 is engaged with the worm 32 installed on the bicycle frame 1. The worm 32 is connected to the rotor unit 42 of the resistance motor 4, driving the rotor unit 42 of the motor to rotate relative to the stator unit 41 to generate electricity. The electric energy generated by the resistance motor 4 is transmitted to the power storage module through the line for storage. The power storage module can reverse power the motor to switch it to electric motor mode, drive the worm 32 to rotate in the opposite direction, realize the deceleration and torque increase of the worm gear 31, and thus generate riding resistance. The control system drives the worm gear 32 to rotate and monitors the torque output by the worm gear 31 through the torque sensor, and adjusts the current of the resistance motor 4 according to the torque feedback, adjusts the speed of the worm gear 32, and accurately controls the riding resistance.

[0029] This solution improves energy efficiency through motor power generation and energy recovery. The deceleration and torque-increasing mechanism provides smooth resistance adjustment. The control system intelligently adjusts the power of the resistance motor 4 to adjust the riding resistance, thereby enhancing the user experience. Future work is underway to improve the low-speed efficiency of the resistance motor 4, reduce the meshing noise of the worm gear 31 and worm 32, and add more intelligent features, such as an automatic resistance adjustment program or connectivity with external devices, to further optimize the riding experience.

[0030] Specifically, the fitness bicycle also includes a control system and a torque sensor used in conjunction with it. The torque sensor is arranged on the worm gear 31. The torque sensor is used to monitor the magnitude of the torque output by the worm gear 31 in real time and feed it back to the control system. The control system is used to adjust the magnitude of the current output by the resistance motor 4 according to the magnitude of the torque and thereby adjust the speed of the worm 32.

[0031] The pedal mechanism 2 is connected to the worm 32 through a worm gear 31, and the worm 32 is connected to the rotor unit 42 of the resistance motor 4. The torque sensor is installed at the bearing or hub position of the worm gear 31 to monitor the torque output by the worm gear 31 in real time. When the user steps on the pedal, the worm gear 31 rotates to drive the worm 32 to rotate, and the torque sensor feeds back the real-time torque data of the worm gear 31 to the control system. The control system automatically adjusts the output current of the resistance motor 4 according to the torque data, adjusts the speed of the resistance motor 4, and then changes the rotation speed of the worm 32 to control the resistance during riding. In addition, the electrical energy generated by the motor when generating electricity is stored in the battery module on the bicycle frame 1. This electrical energy can be used to drive the motor to work in reverse, so that it provides resistance in electric mode.

[0032] The torque sensor works in conjunction with the control system to precisely adjust resistance based on the user's riding intensity, enhancing the riding experience and improving training effectiveness. Future improvements include optimizing the sensitivity and accuracy of the torque sensor, improving the power generation efficiency of the resistance motor 4 at low speeds, reducing energy losses in the mechanical transmission system, and further improving the system's responsiveness and smoothness.

[0033] Specifically, the rotor unit 42 includes an iron core connected to the worm 32 and a coil winding disposed on the iron core. The stator unit 41 includes a stator housing 411 fixedly mounted on the bicycle frame 1, and a magnetic member 412 is disposed within the stator housing 411. The pedal mechanism 2 drives the worm 32 to rotate via the worm gear 31. The rotating worm 32 drives the coil winding to rotate relative to the magnetic member 412 of the stator housing 411 to generate electricity. When the worm 32 rotates, the coil winding rotates relative to the magnetic member 412 in the stator housing. The change in magnetic field induces an induced current in the stator coil winding, thereby generating electricity. The generated electrical energy is transmitted to the energy storage module via the line and can be used by the system or recycled.

[0034] Specifically, the foot pedal mechanism 2 comprises a rotating shaft 21 connected with a worm gear 31, two transmission brackets 22 arranged at both ends of the rotating shaft 21, and foot pedals 23 arranged on the transmission brackets 22. The rotating shaft 21 is supported and installed on the bicycle support 1 of the exercise bicycle through a bearing, one end of the rotating shaft 21 is fixedly connected with the worm gear 31 through a flange or a key, and synchronous rotation of the rotating shaft 21 and the worm gear 31 is ensured. The transmission brackets 22 are respectively installed at both ends of the rotating shaft 21 and are fixed by bolts or welding. The foot pedals 23 are installed on each transmission bracket 22, the foot pedals 23 are connected with the transmission brackets 22 through an axle pin, and the axle pin is provided with a bearing so that the foot pedals 23 can freely rotate when being stepped on. When the foot pedals 23 are stepped on, the rotating shaft 21 drives the worm gear 31 to rotate, and then the resistance is adjusted through the worm gear 31 and the worm 32 mechanism.

[0035] Specifically, the bicycle support 1 is detachably connected with a load support 5, the resistance motor 4 and the speed reduction mechanism 3 are arranged on the load support 5, and the rotating shaft 21 is rotatably arranged on the load support 5 and connected with the worm gear 31. The load support 5 is detachably connected with the bicycle support 1 in a bolt or quick lock structure. The resistance motor 4 and the speed reduction mechanism 3 are integrally fixed and installed on the load support 5, and are stably ensured through thread connection or clamp fixing.

[0036] The rotating shaft 21 is supported and arranged on the load support 5 through a bearing, the middle part of the rotating shaft 21 is connected with the worm gear 31 through a key or a spline, and rotation transmission is realized. The load support 5 is designed to be convenient for maintenance or replacement, the user can quickly detach the load support 5 to perform system inspection or adjust the positions of the resistance motor 4 and the speed reduction mechanism 3. The rotor of the resistance motor 4 is connected with the worm 32 through a connecting piece, and the whole structure is compact and convenient to install. The scheme realizes modular installation of the resistance motor 4, the speed reduction mechanism 3 and the rotating shaft 21, is convenient for maintenance and replacement. The detachable design of the load support 5 makes resistance adjustment and component replacement more convenient, and reduces maintenance cost. The scheme also enhances the structural stability of the system and ensures the accuracy of resistance control in foot pedal exercise.

[0037] Specifically, the reduction mechanism 3 also includes a first housing 33, which is made of metal material and has an internal cavity 331 for accommodating the worm wheel 31 and the worm 32. The first housing 33 is provided with a bearing mounting seat for mounting bearings. The worm wheel 31 and the worm 32 are supported by corresponding bearings and are respectively installed at different positions of the housing to ensure that they can rotate stably during operation. The rotating shaft 21 passes through the first housing 33 and rotates with it through bearings. The rotating shaft 21 is connected to the center of the worm wheel 31, while the worm 32 is supported by another bearing on the other side of the first housing 33 and meshes with the worm wheel 31. The worm wheel 31 and the worm 32 are installed in a vertically intersecting manner. The worm 32 drives the worm wheel 31 through rotation to achieve power transmission and deceleration. The design of the housing can enclose the entire reduction mechanism 3, prevent external dust and debris from entering, and extend the service life of the mechanism.

[0038] The design of the first housing 33 in this solution effectively protects the worm gear 31 and worm 32 transmission mechanism, reducing the impact of the external environment on its operation and improving the stability and durability of the transmission system. The use of bearings also reduces rotational friction, ensuring smooth operation of the rotating shaft 21 and worm 32. This design makes the reduction mechanism 3 compact and helps improve overall transmission efficiency.

[0039] Specifically, the resistance motor 4 has a second cover shell (in this embodiment, the second cover shell is the stator shell) that covers the stator unit 41 and the rotor unit 42. The second cover shell covers the stator unit 41 and the rotor unit 42 of the motor and is made of lightweight metal or high-strength plastic material. The second cover shell is detachably connected to the first cover shell 33 by bolts or a snap-on structure, so that the entire reduction mechanism 3 and the resistance motor 4 can be assembled and maintained as a modular unit. The stator unit 41 is fixed to the inside of the second cover shell by bolts or welding, while the rotor unit 42 is supported on the inside of the stator unit 41 by bearings, ensuring that the gap between the rotor and the stator is evenly distributed and can rotate smoothly. The detachable design between the first cover shell 33 and the second cover shell allows maintenance personnel to easily open the cover shell to inspect or replace internal parts, especially when there is a problem with the stator or rotor, it can be quickly disassembled for maintenance.

[0040] Specifically, the bicycle rack 1 includes a carrier frame 11 arranged in an "I"-shaped structure, a first bracket 12 and a second bracket 13 arranged on the carrier frame 11, the first bracket 12 is provided with a seat cushion 121 at one end away from the carrier frame 11, and the second carrier frame 11 is provided with a handle 131 at one end away from the carrier frame 11.

[0041] The supporting frame 11 adopts an "I"-shaped structural design and is made of high-strength metal materials to ensure the stability and load-bearing capacity of the structure. The bottom of the supporting frame 11 is in contact with the ground through rubber pads or adjustment feet to provide an anti-slip effect. The first bracket 12 is tilted in the middle of the supporting frame 11 and tilted away from the second bracket 13. The second bracket 13 is vertically installed at one end of the supporting frame 11. The top of the first bracket 12 is fixed with a seat cushion 121 by bolts or welding. The user can adjust the height of the seat cushion 121 according to the height. The handle 131 is installed on the top of the second bracket 13, which is also fixed by bolts and is provided with an adjustable device to facilitate the rider to adjust the height or angle of the handle 131 according to needs. The lower ends of the two brackets are firmly connected to the supporting frame 11 by welding or bolts to ensure that the structure will not loosen or deform during riding.

[0042] Specifically, the seat cushion 121 is provided with a first telescopic rod 120, and the handle 131 is provided with a second telescopic rod 130. The first bracket 12 and the second bracket 13 are respectively provided with a first accommodating cavity 331 and a second accommodating cavity 331. The first telescopic rod 120 and the second telescopic rod 130 are telescopically arranged in the first accommodating cavity 331 and the second accommodating cavity 331. The first bracket 12 and the second bracket 13 are respectively provided with a first knob 122 and a second knob 132 for adjusting the telescopic length of the first telescopic rod 120 and the second telescopic rod 130.

[0043] The first telescopic rod 120 is fixed to the bottom of the seat cushion 121, and the second telescopic rod 130 is fixed under the handle 131. The first telescopic rod 120 is installed in the first accommodating chamber 331 in the first bracket 12 through a sliding structure, while the second telescopic rod 130 is installed in the second accommodating chamber 331 in the second bracket 13. The inner wall of the accommodating chamber 331 is provided with a guide device to ensure that the telescopic rod remains stable and can be smoothly extended and retracted during the adjustment process. The length adjustment of each telescopic rod is controlled by the first knob 122 and the second knob 132 arranged on the outside of the bracket. These knobs are connected to the outer wall of the telescopic rod by threads. After tightening the knob, the locking mechanism (such as a spring or a buckle) in the knob will fix the telescopic rod to prevent it from sliding during use.

[0044] Specifically, the resistance adjustment unit includes a touch screen 6 arranged on the carrier 11 and connected to the control system. The rider inputs instructions to the control system through the touch screen 6, and the control system adjusts the current output from the storage module or external power supply to the resistance motor 4.

[0045] The touch screen 6 is installed in the middle of the handle 131, which is convenient for the rider to operate directly during the riding process. The touch screen 6 is electrically connected with the internal control system integrated in the inside of the carrier frame 11, which is responsible for receiving user instructions from the touch screen 6. The rider selects different resistance levels or training modes through the touch screen 6 interface, and the control system adjusts the current size of the power supply to the resistance motor 4 from the power storage module or external power supply, so as to change the resistance output by the motor.

[0046] The power storage module can be located inside the bicycle support 1 or directly installed on the carrier frame 11 to ensure the stability of power supply. When an external power supply is selected, the power supply is connected to the system through an adapter to ensure long-time power supply. The touch screen 6, control system, power storage module and motor are electrically connected through cables or wireless methods to ensure stable transmission of signals and current.

[0047] Specifically, the worm gear 31 is provided with a plurality of helical gears 311, the tooth surfaces of which are arranged at a certain angle relative to the rotation axis of the worm gear 31, forming a meshing angle intersecting the axis. The helical gears 311 are fixedly connected with the inner circumference or side surface of the worm gear 31, so as to move synchronously with the rotation of the worm gear 31. The worm gear 32 is provided with a helical tooth 321 meshing with the helical gear 311, and the shape of the helical tooth 321 and the tooth shape of the helical gear 311 are designed to cooperate and mesh, so as to ensure smooth meshing and uniform friction during power transmission. The worm gear 32 is fixed on the axis intersecting the worm gear 31 through a support bearing, forming a vertical or oblique structure layout, so as to realize the change of transmission direction. The helical tooth 321 of the worm gear 32 and the tooth surface of the helical gear 311 maintain an accurate meshing angle during operation, and the rotation of the worm gear 32 drives the rotation of the worm gear 31 and its helical gear 311, achieving the effect of speed reduction and power increase.

[0048] Through the design of the helical gear 311 and the helical tooth 321, this scheme can provide more stable and quiet power transmission during transmission, reducing the vibration and noise of the traditional straight gear system. The inclined tooth surface design of the helical gear 311 also improves the contact area of the gear, so that the load distribution is more uniform, prolonging the service life of the transmission system. In addition, the precise meshing of the worm gear 32 and the helical gear 311 improves the transmission efficiency and provides more reliable output under large torque demand.

[0049] The scheme can significantly amplify the output torque under the condition that the minimum power is provided by the resistance motor 4, thereby effectively improving the resistance when the user rides. Specifically, when the worm wheel 31 and the worm 32 are engaged and driven, the rotation of the worm 32 drives the worm wheel 31 to rotate at a very low speed, thereby achieving a large reduction effect. For example, when the output power of the motor is small, the high-speed rotation of the worm 32 is converted into low-speed high-torque output of the worm wheel 31, so that the rider feels the maximum resistance. In this way, the riding difficulty can be increased by relying on the mechanical structure without consuming too much electric energy, thereby simulating the experience of uphill or high-resistance riding.

[0050] The above is only a preferred embodiment of the present application, and for those skilled in the art, the specific implementation and application range can be changed according to the idea of the present application, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A fitness bicycle with high-efficiency resistance adjustment, comprising a bicycle frame (1) and a pedal mechanism (2) arranged on the bicycle frame (1); characterized in that: The invention also includes a speed reduction mechanism (3) and a resistance motor (4). The speed reduction mechanism (3) includes a worm wheel (31) and a worm (32) rotatably arranged on the bicycle frame (1). The worm wheel (31) is meshed with the worm (32). The pedal mechanism (2) is connected to the worm wheel (31). The resistance motor (4) has a stator unit (41) and a rotor unit (42). The rotor unit (42) of the resistance motor (4) is connected to the worm (32). The pedal mechanism (2) drives the worm (32) to rotate via the worm wheel (31). The worm (32) drives the rotor unit (42) to rotate relative to the stator unit (41). The stator unit (41) is used to cut magnetic lines of force to generate electricity. The electric energy generated by the resistance motor (4) or an external power source is used to power the resistance motor (4) so ​​that it switches to the motor mode. The resistance motor (4) in the motor mode is used to drive the worm (32) to rotate to achieve deceleration and torque increase of the worm wheel (31) so that the pedal mechanism (2) generates resistance.

2. The fitness bicycle with high-efficiency resistance adjustment according to claim 1, characterized in that: The fitness bicycle further comprises a control system and a torque sensor used in conjunction therewith, wherein the torque sensor is arranged on the worm gear (31), and is used to monitor the magnitude of the torque output by the worm gear (31) in real time and feed back the torque to the control system, and the control system is used to adjust the magnitude of the current output by the resistance motor (4) according to the magnitude of the torque, thereby adjusting the rotational speed of the worm gear (32).

3. The fitness bicycle with high-efficiency resistance adjustment according to claim 1, characterized in that: The rotor unit (42) includes an iron core connected to the worm (32) and a coil winding arranged on the iron core. The stator unit (41) includes a stator housing (411) fixedly mounted on the bicycle frame (1). A magnetic component (412) is provided in the stator housing (411). The pedal mechanism (2) drives the worm (32) to rotate via the worm wheel (31). The rotating worm (32) drives the coil winding to rotate relative to the magnetic component (412) of the stator housing (411) to generate electricity.

4. The fitness bicycle with high-efficiency resistance adjustment according to claim 1, characterized in that: The pedal mechanism (2) comprises a rotating shaft (21) connected to a worm gear (31), two transmission brackets (22) arranged at both ends of the rotating shaft (21), and a pedal (23) arranged on the transmission brackets (22).

5. The fitness bicycle with high-efficiency resistance adjustment according to claim 4, characterized in that: The bicycle frame (1) is detachably connected to a load frame (5); the resistance motor (4) and the speed reduction mechanism (3) are both arranged on the load frame (5); and the rotating shaft (21) is rotatably arranged on the load frame (5) and connected to a worm gear (31).

6. The fitness bicycle with high-efficiency resistance adjustment according to claim 4, characterized in that: The speed reduction mechanism (3) further comprises a first cover (33) arranged on the bicycle frame (1), the first cover (33) having an accommodating cavity (331) for accommodating the worm wheel (31) and the worm (32), the rotating shaft (21) and the worm (32) being rotatably arranged on the first cover (33) via bearings, and the rotating shaft (21) and the worm (32) being arranged crosswise with each other.

7. The fitness bicycle with high-efficiency resistance adjustment according to claim 1, characterized in that: The bicycle frame (1) comprises a carrier frame (11) arranged in an "I"-shaped structure, a first bracket (12) and a second bracket (13) arranged on the carrier frame (11), wherein the first bracket (12) is provided with a seat cushion (121) at one end away from the carrier frame (11), and the second bracket (11) is provided with a handle (131) at one end away from the carrier frame (11).

8. The fitness bicycle with high-efficiency resistance adjustment according to claim 7, characterized in that: The seat cushion (121) is provided with a first telescopic rod (120), and the handle (131) is provided with a second telescopic rod (130). The first telescopic rod (120) and the second telescopic rod (130) are respectively telescopically arranged on the first bracket (12) and the second bracket (13). The first bracket (12) and the second bracket (13) are respectively provided with a first knob (122) and a second knob (132) for adjusting the telescopic length of the first telescopic rod (120) and the second telescopic rod (130).

9. The fitness bicycle with high-efficiency resistance adjustment according to claim 1, characterized in that: The bicycle frame (1) is provided with a touch screen (6) connected to a control system. The rider inputs instructions to the control system via the touch screen (6), and the control system adjusts the magnitude of the current output from the power storage module or the external power supply to the resistance motor (4).

10. The fitness bicycle with high-efficiency resistance adjustment according to claim 1, characterized in that: The worm wheel (31) is provided with a plurality of helical gears (311), the tooth surfaces of the helical gears (311) and the plane where the rotation axis of the worm wheel (31) is located are arranged to intersect with each other, and the worm (32) is provided with helical teeth (321) meshing with the helical gears (311).

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