Constant-power damper and power vehicle

Abstract

The utility model provides a constant-power damper and a power vehicle. The constant-power damper comprises a metal flywheel and a damping disc. The damping disc comprises a front plate, a bottom plate, a gear rotating disc clamped between the front plate and the bottom plate and a powerful magnet assembly. Coil winding assemblies are arranged on the bottom plate, and the powerful magnet assemblies are symmetrically arranged between the coil winding assemblies; the coil winding assembly receives power supply according to the target power control value; a motor and a gear are arranged on the front plate, and the motor drives the gear to drive the gear turntable to rotate according to a target power value, so that the powerful magnet assembly moves to a target position. By adopting the constant-power damper provided by the utility model, the position adjustment of the powerful magnet assembly and the power supply current of the coil winding assembly are combined, so that the constant-power control output can be accurately carried out, and a power vehicle can stably output constant power.

Description

Technical Field

[0001] This utility model relates to the technical field of sports training and health testing equipment, specifically to a constant power damper and a power vehicle. Background Technology

[0002] A stationary bike is a testing tool used to assess an individual's cardiopulmonary function. It calculates the metabolic equivalent (MET) at a specific power level by combining a preset power output with the test subject's weight. Furthermore, using the MET values ​​from two-stage power tests and their corresponding heart rates, the test subject's cardiopulmonary limit—i.e., maximum oxygen uptake—can be calculated. In conducting a two-stage power test, the stationary bike's power level must first be set, and the test subject is required to pedal at a fixed speed. However, in practice, test subjects often find it difficult to maintain a consistent pedaling speed. Therefore, to ensure the accuracy of the measured maximum oxygen uptake data, the stationary bike needs to automatically adjust the damping of its damping device based on the user's current pedaling speed to maintain the set power level.

[0003] To ensure a stable and constant power output, the damping of a power bicycle needs to be dynamically adjusted in real time. Currently, damping adjustment for power bicycles mainly falls into two categories: one is to control the damping magnitude by adjusting the gap between the magnet and the metal flywheel using a wire, and the other is to control the damping magnitude by changing the current in the winding of the energized coil. However, both methods have drawbacks. The first method is difficult to precisely control the power; while the second method, although convenient and precise through current control, has a limited power adjustment range due to issues such as heat generation. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings of existing power vehicle damping adjustment methods by providing a low-cost constant power damper and power vehicle that can accurately control constant power.

[0005] The objective of this utility model can be achieved through the following technical measures:

[0006] This utility model provides a constant power damper, including a metal flywheel and a damping disk disposed on the inner circumference of the metal flywheel and coaxially connected thereto, both fixed on a flywheel bracket. The damping disk includes a front plate and a bottom plate coaxially connected, a gear disk clamped between the front plate and the bottom plate, and a powerful magnet assembly connected to the gear disk. At least one pair of coil winding assemblies are symmetrically arranged on the bottom plate on the outer circumference of the gear disk, and at least one pair of powerful magnet assemblies are symmetrically arranged between the coil winding assemblies. The coil winding assemblies are controlled by a constant power controller and receive power according to a target power control value. A motor and a gear connected to the motor are disposed on the front plate, and the gear meshes with the gear disk gear. The motor is controlled by the constant power controller and drives the gear to rotate the gear disk according to the target power control value, so that the powerful magnet assembly moves to the target position.

[0007] Optionally, the gear turntable includes rotating teeth that mesh with gears on its outer peripheral surface, and a groove on the surface; the powerful magnet assembly includes a slider and a powerful magnet; the slider is T-shaped, with a slider hole and a slider groove on the longitudinal part of the T-shape, and at least one rectangular groove on the transverse part; the powerful magnet is placed in the rectangular groove; the slider hole and the groove are aligned and connected by a sliding bearing; a groove fixing sleeve passes through the slider groove and is fixed to the front plate and the bottom plate; when the gear turntable rotates, the sliding bearing slides in the groove, causing the powerful magnet placed on the slider to reciprocate radially relative to the center of the bottom plate.

[0008] Optionally, a limit detector is provided on the front panel, and two limit holes are provided on the gear turntable; the limit detector is used to detect whether the gear turntable has rotated to the limit position by detecting the limit holes, and feeds back to the constant power controller.

[0009] Optionally, the coil winding assembly includes an electromagnet silicon steel sheet and a coil winding disposed on the electromagnet silicon steel sheet and connected to a constant power controller; the electromagnet silicon steel sheet is disposed on a base plate and does not interfere with the position of the powerful magnet assembly.

[0010] Optionally, a tension sensor is also included, with one end connected to the flywheel bracket and the other end connected to the damping disc, to detect the resistance generated by the damping disc on the rotating metal flywheel and feed it back to the constant power controller.

[0011] Optionally, it also includes an interface PCB board mounted on the front panel and connected to the constant power controller. The coil winding assembly, motor, limit detector, and tension sensor are all connected to the interface PCB board.

[0012] Optionally, a flange is also included, which is fixed to the front plate and coaxially connected to the metal flywheel.

[0013] This utility model also provides a power vehicle, including the constant power damper, frame body, drive wheel, speed detector, constant power controller, seat, armrest, meter, and belt as described in any of the above claims; the seat is fixed in the middle of the frame body, the drive wheel and constant power damper are fixed at both ends of the seat on the frame body, and the armrest and meter are located on the frame body near the drive wheel; the outer peripheral surface of the drive wheel is connected to the outer peripheral surface of the metal flywheel via a belt; the speed detector fixed on the frame body is connected to the drive wheel to detect the speed of the drive wheel and feed it back to the constant power controller; the meter and speed detector are connected to the constant power controller located on the frame body.

[0014] Optionally, it also includes a heart rate measuring device mounted on the frame body and connected to the constant power controller, used to detect the test subject's heart rate and feed it back to the constant power controller.

[0015] Optionally, the main frame includes a foldable front frame and a support frame for fixing the seat, with a lifting push rod motor controlled by a constant power controller to drive the lifting seat.

[0016] The constant power damper provided by this utility model includes a metal flywheel and a damping disk disposed on the inner circumference of the metal flywheel and coaxially connected thereto. Both are fixed on a flywheel bracket. The damping disk includes a front plate and a bottom plate coaxially connected, a gear disk clamped between the front plate and the bottom plate, and a powerful magnet assembly connected to the gear disk. At least one pair of coil winding assemblies are symmetrically arranged on the bottom plate on the outer circumference of the gear disk, and at least one pair of powerful magnet assemblies are symmetrically arranged between the coil winding assemblies. The coil winding assemblies are controlled by a constant power controller and receive power according to a target power control value. A motor and a gear connected to the motor are disposed on the front plate, and the gear meshes with the gear disk gear. The motor is controlled by the constant power controller and drives the gear to rotate the gear disk according to the target power control value, so that the powerful magnet assembly moves to the target position. By using the constant power damper provided by this utility model, the power can be adjusted over a wide range by adjusting the position of the powerful magnet assembly according to the target power control value. At the same time, combined with the power supply current of the coil winding assembly, the power can be adjusted accurately in real time and quickly. The combination of the two can achieve precise control output of constant power.

[0017] The power vehicle provided by this utility model uses a constant power damper that can accurately achieve constant power control output, thereby enabling the power vehicle to stably output constant power. Attached Figure Description

[0018] Figure 1 This is an exploded view of the constant power damper provided in this embodiment of the utility model;

[0019] Figure 2This is a schematic diagram of the constant power damper provided in this embodiment of the present invention from a side view.

[0020] Figure 3 This is a schematic diagram of the front plate in the constant power damper provided in this embodiment of the utility model;

[0021] Figure 4 A schematic diagram of the base plate, gear turntable, powerful magnet assembly, and coil winding assembly in the constant power damper provided in this embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the back of the bottom plate of the constant power damper provided in this embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram showing the meshing of a gear with a gear disc placed on a base plate in a constant power damper provided in this embodiment of the utility model.

[0024] Figure 7 This is a schematic diagram of the gear disk in the constant power damper provided in this embodiment of the utility model;

[0025] Figure 8 This is a schematic diagram of the slider in the constant power damper provided in this embodiment of the utility model;

[0026] Figure 9 This is a schematic diagram of the slider in the constant power damper provided in this embodiment of the utility model;

[0027] Figure 10 This is a schematic diagram of a powerful magnet moving to a first position in a constant power damper provided in this embodiment of the present invention, with the magnet reciprocating radially relative to the center of the base plate.

[0028] Figure 11 This is a schematic diagram of the powerful magnet moving to the second position in the constant power damper provided in this embodiment of the utility model, with radial reciprocating motion relative to the center of the base plate.

[0029] Figure 12 This is a structural schematic diagram of the power vehicle provided in an embodiment of this utility model. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0031] Please refer to Figures 1 to 9The constant power damper provided in this embodiment of the utility model includes a metal flywheel 1 and a damping disc 2. The damping disc 2 is disposed on the inner circumference of the metal flywheel 1, and the two are coaxially mounted on the flywheel bracket aa through the flywheel shaft bb.

[0032] The damping disk 2 includes a front plate 21, a base plate 22, a gear disk 23, a powerful magnet assembly 24, a coil winding assembly 25, a motor 26, and a magnetic wheel 27. The front plate 21 and base plate 22 are generally circular with symmetrical rectangular notches. The front plate 21 and base plate 22 are coaxially connected, meaning the front plate 21, base plate 22, and metal flywheel 1 are coaxial. The gear disk 23 is clamped between the front plate 21 and base plate 22 and is coaxial with them. The gear disk 24 is circular. A pair of coil winding assemblies 25 are symmetrically arranged on the outer periphery of the gear disk 24 on the base plate 22, and two pairs of powerful magnet assemblies 24 connected to the gear disk 23 are symmetrically arranged between the coil winding assemblies 25. The motor 26 and gear 27 are fixed to the front plate 21, with gear 27 fixed on the side of the front plate 21 facing the gear disk 23. The motor 26 is a stepper motor. Gear 27 meshes with gear turntable 23. It should be noted that the number of pairs of coil winding assembly 25 and strong magnet assembly 24 can be designed by those skilled in the art according to the power adjustment requirements, and this utility model does not limit this.

[0033] Both the coil winding assembly 24 and the motor 24 are controlled by a constant power controller. Based on the target power control value, the constant power controller controls the power supply to supply power to the coil winding assembly 24. According to the change in current through the coil winding assembly 24, the damping of the damping disk 2 is changed to achieve power regulation. Based on the target power control value, the constant power controller controls the motor 26 to drive the gear 27, which in turn drives the gear disc 23 to rotate, thereby moving the powerful magnet assembly 24 connected to the gear disc 23 to the target position, changing the damping of the damping disk 2 to achieve power regulation. In this embodiment, the constant power controller and the power supply are not shown in the figures. Those skilled in the art can install them on the damper as needed, or they can be placed outside the damper as external devices. This invention does not specifically limit this.

[0034] The constant power damper provided in this embodiment of the utility model can adjust the power over a wide range by adjusting the position of the powerful magnet assembly according to the target power control value. At the same time, combined with the power supply current of the coil winding assembly, the power can be adjusted accurately in real time. The combination of the two can accurately control the constant power output.

[0035] The gear turntable 23 is circular, with rotating teeth 231 meshing with gears 27 along its outer circumference. It also has four arc-shaped grooves 232, two limiting holes 233, and a central hole 234 on its surface. The powerful magnet assembly 24 includes a slider 241 and powerful magnets 242. The slider 241 is T-shaped, with a slider hole 2411 and a slider groove 2412 on the longitudinal part of the T-shape, and four rectangular slots 2413 on the transverse part. A powerful magnet 242 is fixed within each rectangular slot 2413, with the magnets positioned and fixed in a manner where the S / N poles alternate outwards. The slider hole 2411 aligns with the groove 232 of the gear turntable 23 and is connected by a sliding bearing. Simultaneously, a groove fixing bushing passes through the slider groove 2412 and is fixed to the front plate 21 and the bottom plate 22. When the gear turntable 23 rotates, the sliding bearing slides in the arc-shaped groove 232, thereby causing the powerful magnet 242 fixed on the slider 241 to reciprocate radially relative to the center of the base plate 22.

[0036] Please refer to Figure 10 Figure 11 This diagram illustrates the radial reciprocating motion of a powerful magnet relative to the center of the base plate, moving it to a first position and a second position. The first and second positions represent the two extreme positions at which the powerful magnet 242 can be moved by the rotation of the gear turntable 23. When the powerful magnet 242 moves to the first position, which is closest to the center of the base plate 22, the damping applied by the damping disk 2 to the metal flywheel 1 is relatively small; when the powerful magnet 242 moves to the second position, which is farthest from the center of the base plate 22, the damping applied by the damping disk 2 to the metal flywheel 1 is relatively large. By adjusting the position of the powerful magnet 242, the power can be adjusted over a wide range.

[0037] Please continue reading. Figures 1 to 11 The front plate 21 is also equipped with a limit detector 28 and a flange 29. One end of the flange 29 is fixed to the front plate 21, and the other end passes through the shaft hole 234 of the gear turntable 23 and is coaxially inserted into the metal flywheel 1. The motor 26 drives the gear 27 to drive the gear turntable 23, which rotates around the shaft hole 234. The limit detector 28 is an infrared sensor, with two corresponding limit holes 233. It is fixed to the front plate 21 and passes through the through hole in the front plate 21, close to the gear turntable 23. By detecting the limit holes 233 through the limit detector 28, it is possible to detect whether the gear turntable 23 has rotated to the limit position marked by the limit hole 233, and feeds back to the constant power controller, i.e., 10 and Figure 11As shown, when the powerful magnet 242 moves radially reciprocating relative to the center of the base plate 22 to the first position and the second position respectively, the coil winding assembly 25 includes an electromagnet silicon steel sheet 251 and a coil winding 252. The electromagnet silicon steel sheet 251 is disposed at a rectangular notch in the base plate 22, and has a receiving space. The coil winding 252 is placed on the electromagnet silicon steel sheet 251 within this receiving space. The position of the electromagnet silicon steel sheet 251 on the base plate 22 should not interfere with the position of the powerful magnet assembly 24. The coil winding 252 is connected to a constant power controller and is controlled by the constant power controller. The power is adjusted by the magnitude of the current supplied. In this embodiment of the present invention, a small current is adjusted on the coil winding 252 to achieve a fast and real-time power adjustment effect.

[0038] The damping disc 2 is coaxially mounted on the flywheel bracket aa via the flywheel shaft bb and the metal flywheel 1. A tension sensor 210 is also connected to the damping disc 2. One end of the tension sensor 210 is fixed to the damping disc 2, and the other end is fixed to the flywheel bracket aa. Based on the principle that action and reaction forces are equal, the resistance of the damping disc 2 to the metal flywheel 1 is equal to the force exerted by the damping disc 2 on the tension sensor 210. The current output power value can be calculated by combining the tension value detected by the tension sensor 210 with the rotational speed of the metal flywheel 1. It should be noted that obtaining the rotational speed of the metal flywheel is conventional for those skilled in the art. It can generally be achieved by directly detecting the rotational speed of the metal flywheel using a speed detector, or indirectly detecting it. For example, when the damper is applied to a power vehicle, the rotational speed of the drive wheel that drives the metal flywheel is usually detected as the rotational speed value of the metal flywheel.

[0039] This invention utilizes the principle that action and reaction forces are equal. The resistance of the damping disc 2 to the metal flywheel 1 is equal to the force exerted by the damping disc 2 on the tension sensor 210. By using the tension value detected by the tension sensor 210 and the rotational speed of the metal flywheel 1, the output power of the damper can be calculated quickly and accurately, thereby enabling precise adjustment and control of the damper to output constant power.

[0040] An interface PCB board 211 is also provided on the front plate 21 of the damping disc 2. The coil winding assembly 25, the motor 26, the limit detector 28, and the tension sensor 210 are all connected to the interface PCB board 211, which is connected to the constant power controller. During power regulation, the constant power controller receives the detection signals fed back by the limit detector 28 and the tension sensor 210 through the PCB board 211, and sends control signals to the coil winding assembly 25 and the motor 26.

[0041] The constant power electromagnetic damper provided by this utility model works as follows: the constant power controller, based on the input target power control value, the tension value fed back by the tension sensor 210, and the obtained rotational speed value of the metal flywheel 1, combines the control motor 26 to drive the gear 27 to rotate the gear turntable 23, thereby moving the strong magnet 242 in the strong magnet assembly 24 to a suitable position, and controls the power supply device to adjust the current input to the coil winding 252 in the coil winding assembly 25, thus achieving constant power output. The formula for calculating the output power of the constant power damper provided by this utility model is as follows:

[0042] (1) V = D·π·R v

[0043] (2) P = F·V = F·D·π·R v

[0044] In the formula, V represents the linear velocity of the metal flywheel, in meters per second; D represents the diameter of the metal flywheel, in meters; R v The value represents the rotational speed of the metal flywheel, in revolutions per second; F represents the measured value of the tension sensor, in Newtons; and P represents the output power of the constant power damper, in watts.

[0045] The following examples illustrate two optional constant power regulation processes provided by the constant power damper according to this utility model:

[0046] One possible constant power regulation process is as follows: calculate the target tension value that the tension sensor should detect (i.e., the damping that the damping disc should provide) under the target power control value and the current rotation speed of the metal flywheel; control the powerful magnet assembly to move to a suitable position so that the detection value of the tension sensor reaches the target tension value; and adjust the power in real time, quickly and accurately by adjusting the small current of the input coil winding assembly, thereby achieving constant power output.

[0047] One possible constant power regulation process is as follows: Calculate the target tension value that the tension sensor should detect (i.e., the damping that the damping disc should provide) under the target power control value and the current rotational speed of the metal flywheel; adjust the current of the input coil winding assembly, calculate whether the current detection value of the tension sensor can reach the target tension value; if not, reduce the current of the input coil winding assembly, and simultaneously move the powerful magnet assembly to a suitable position so that the current detection value of the tension sensor reaches the target tension value, and end the regulation; if yes, maintain the current magnitude of the current section of the input coil winding assembly, and end the regulation.

[0048] Existing designs achieve wide-range power regulation by solely adjusting the movement of a powerful magnet assembly, but suffer from slow motor adjustment speed and inability to track power in real time. Conversely, adjusting the input current of a single coil winding assembly allows for rapid adjustment, but the coil is unsuitable for prolonged high-current operation due to high heat generation and limited adjustment range. The damper provided by this invention combines both adjustment methods, enabling not only wide-range power regulation but also precise, real-time power adjustment, thus allowing for accurate and constant power output control.

[0049] Please refer to Figure 12 The power vehicle provided in this embodiment includes a constant power damper 10, a constant power controller 11, a frame body 12, a drive wheel 13, a speed detector 14, a seat 15, an armrest 16, a meter 17, a belt 18, a heart rate meter 19, and a lifting push rod motor 110.

[0050] The seat 15 is fixed in the middle of the frame body 12, the drive wheel 13 and the constant power damper 10 are fixed on both ends of the seat 15 on the frame body 12, and the armrest 16 and the instrument panel 17 are located on the frame body 12 near the drive wheel 13.

[0051] The outer circumferential surface of the drive wheel 13 is connected to the outer circumferential surface of the metal flywheel in the constant power damper 10 via a belt 18. When the pedal of the drive wheel 13 is pressed, the metal flywheel rotates via the belt 18, and the metal flywheel and drive wheel 13 rotate at the same speed. A speed detector 14, fixed to the frame body 12, is connected to the drive wheel 13. By detecting the speed of the drive wheel 13, the speed of the metal flywheel is obtained, and this information is fed back to the constant power controller 11. The heart rate monitor 19, the meter 17, and the speed detector 14 are connected to the constant power controller 11 mounted on the frame body 12. The heart rate monitor 19 detects the test subject's heart rate and feeds it back to the constant power controller 11, while the meter 17 provides control interaction and status display functions.

[0052] The main frame 12 includes a foldable front frame 121 and a support frame 122 for fixing the seat 15. The front frame 121 is equipped with a folding button; rotating the button releases the folding button, allowing the front frame 121 to fold inwards, thus miniaturizing the main frame 12. The support frame 122 houses a lifting push rod motor 110 controlled by a constant power controller 11 to drive the lifting and lowering of the seat 15. The height of the seat 15 can be adjusted by the extension and retraction of the lifting push rod motor 110. Simultaneously, the seat 15 can also be adjusted forward and backward using a fore-and-aft adjustment knob.

[0053] The tester steps on the pedals on the frame body 12, causing the drive wheel 13 to rotate the metal flywheel in the constant power damper 11. During the test, the constant power controller 11, based on the target power control value output by the meter 17, combined with the tension value fed back by the tension sensor, and the obtained rotational speed value of the metal flywheel, adjusts the movement of the powerful magnet assembly and the current change of the coil winding assembly in the constant power damper 11 to maintain the stable output of the power bicycle at the target power. The specific power output implementation principle is explained above and will not be repeated here.

[0054] The power vehicle provided by this invention employs a constant power damper that can precisely adjust the damping dynamically to achieve constant power control output, thereby enabling the power vehicle to stably output a constant power.

[0055] To make the description of this disclosure more detailed and complete, illustrative descriptions of the embodiments and specific examples of this utility model are provided below; however, this is not the only form of implementing or using the specific embodiments of this utility model. The embodiments cover the features of multiple specific embodiments and the methods, steps, and sequences for constructing and operating these specific embodiments. However, other specific embodiments may also be used to achieve the same or equivalent functions and sequence of steps.

Claims

1. A constant power damper, comprising a metal flywheel and a damping disc disposed on the inner circumference of the metal flywheel and coaxially connected thereto, both fixed on a flywheel support, characterized in that, The damping disc includes a front plate and a bottom plate coaxially connected, a gear disk clamped between the front plate and the bottom plate, and a powerful magnet assembly connected to the gear disk; at least one pair of coil winding assemblies are symmetrically arranged on the bottom plate on the outer periphery of the gear disk, and at least one pair of powerful magnet assemblies are symmetrically arranged between the coil winding assemblies; the coil winding assembly is controlled by a constant power controller and receives power according to a target power control value; The front panel is equipped with a motor and a gear connected to the motor. The gear meshes with the gear turntable gear. The motor is controlled by the constant power controller, which drives the gear to rotate the gear turntable according to the target power control value, so as to move the powerful magnet assembly to the target position.

2. The constant power damper according to claim 1, characterized in that, The gear turntable includes rotating teeth disposed on the outer peripheral surface that mesh with the gear, and a sliding groove disposed on the surface; the powerful magnet assembly includes a slider and a powerful magnet. The slider is T-shaped, with a slider hole and a slider groove on the longitudinal part of the T-shape, and at least one rectangular groove on the transverse part; the powerful magnet is placed in the rectangular groove; the slider hole and the groove are aligned and connected by a sliding bearing; a groove fixing bushing passes through the slider groove and is fixed to the front plate and the bottom plate; when the gear turntable rotates, the sliding bearing slides in the groove, causing the powerful magnet placed on the slider to reciprocate radially relative to the center of the bottom plate.

3. The constant power damper according to claim 1 or 2, characterized in that, A limit detector is provided on the front plate, and two limit holes are provided on the gear turntable. The limit detector is used to detect whether the gear turntable has rotated to the limit position by detecting the limit holes, and then feeds back to the constant power controller.

4. The constant power damper according to claim 1, characterized in that, The coil winding assembly includes an electromagnet silicon steel sheet and a coil winding disposed on the electromagnet silicon steel sheet and connected to the constant power controller; the electromagnet silicon steel sheet is disposed on the base plate and does not interfere with the position of the powerful magnet assembly.

5. The constant power damper according to claim 3, characterized in that, It also includes a tension sensor, one end of which is connected to the flywheel bracket and the other end of which is connected to the damping disc, for detecting the resistance generated by the damping disc on the rotating metal flywheel and feeding it back to the constant power controller.

6. The constant power damper according to claim 5, characterized in that, It also includes an interface PCB board disposed on the front panel and connected to the constant power controller, wherein the coil winding assembly, motor, limit detector, and tension sensor are all connected to the interface PCB board.

7. The constant power damper according to claim 1, characterized in that, It also includes a flange, which is fixed to the front plate and coaxially connected to the metal flywheel.

8. A power vehicle, characterized in that, Includes the constant power damper, frame body, drive wheel, speed detector, constant power controller, seat, armrest, meter and belt as described in any one of claims 1-7; The seat is fixed in the middle of the frame body. The drive wheel and constant power damper are fixed to both ends of the seat on the frame body. The armrest and the meter are located on the frame body near the drive wheel. The outer circumferential surface of the drive wheel is connected to the outer circumferential surface of the metal flywheel via the belt. The speed detector fixed on the frame body is connected to the drive wheel to detect the speed of the drive wheel and feed it back to the constant power controller. The meter and the speed detector are connected to the constant power controller located on the frame body.

9. The power vehicle according to claim 8, characterized in that, It also includes a heart rate measuring device mounted on the frame body and connected to the constant power controller, used to detect the test subject's heart rate and feed it back to the constant power controller.

10. The power vehicle according to claim 8 or 9, characterized in that, The main body of the vehicle frame includes a foldable front frame and a support frame for fixing the seat. The support frame is equipped with a lifting push rod motor controlled by the constant power controller to drive the lifting and lowering of the seat.

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