Unpowered treadmill

Abstract

The utility model discloses an unpowered treadmill which comprises a treadmill main body and a resistance device, the treadmill main body comprises a treadmill platform, a belt wheel rotationally connected with the treadmill platform and a running belt connected with the belt wheel; the resistance device comprises a support, a rotating shaft and fan blades, the rotating shaft is connected with the support, the fan blades are rotationally connected with the rotating shaft and arranged around the rotating shaft, and the fan blades are in transmission connection with the belt wheel and comprise blades capable of rotating relative to the rotating shaft; when the blades rotate relative to the rotating shaft, the projection area of the blades on a projection plane is increased or decreased, and the projection plane is a radial plane of the rotating shaft. According to the unpowered treadmill, the running resistance is increased through the resistance device, the resistance device can adjust the running resistance through rotation of the blades, and the unpowered treadmill can meet the use requirements of different users for different running resistances.

Description

Technical Field

[0001] The utility model relates to the field of treadmills, in particular to a non-powered treadmill. Background Art

[0002] Treadmills are generally divided into electric treadmills and non-powered treadmills. Among them, non-powered treadmills rely on the friction between the user's feet and the treadmill track to run. They do not require motor drive, are energy-saving and environmentally friendly, and have relatively low manufacturing and maintenance costs.

[0003] The pulleys of some existing non-powered treadmills are connected to resistance devices to increase the resistance during running, but there is a problem that the resistance size cannot be adjusted, and it is difficult to adapt to the use requirements of different users for different resistances. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model provides a non-powered treadmill, which at least solves the technical problem of how to adjust the resistance of the non-powered treadmill and improve the applicability of the product in terms of resistance.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A non-powered treadmill, comprising:

[0009] A treadmill body, the treadmill body comprising a treadmill, a pulley rotatably connected to the treadmill, and a running belt connected to the pulley; and

[0010] A resistance device, the resistance device comprising a bracket, a rotating shaft and a fan blade, the rotating shaft is connected to the bracket, the fan blade is rotatably connected to the rotating shaft and is arranged around the rotating shaft, the fan blade is transmission-connected to the pulley and comprises a blade that can rotate relative to the rotating shaft;

[0011] When the blade rotates relative to the rotating shaft, the projection area of ​​the blade on the projection plane increases or decreases, and the projection plane is a radial plane of the rotating shaft.

[0012] In some embodiments, the resistance device includes: a connecting rod assembly, including a first connecting rod and a second connecting rod rotatably connected to each other, the first connecting rod being rotatably connected to the blade; a sleeve, the sleeve being rotatably sleeved on the periphery of the rotating shaft and being movable in the axial direction of the rotating shaft; a wheel seat, the wheel seat being rotatably connected to the sleeve and being rotatable around the rotating shaft, the wheel seat being connected to the second connecting rod; and a control assembly, movably disposed on the bracket and connected to the wheel seat, and being configured to control the sleeve and the wheel seat to move along the axial direction of the rotating shaft;

[0013] When the wheel seat moves, the blade is driven to rotate through the connecting rod assembly, so that the projection area of ​​the blade on the projection plane increases or decreases.

[0014] In some embodiments, the resistance device includes: a transmission wheel and a connecting disk; the transmission wheel is rotatably connected to the outside of the rotating shaft and is transmission-connected to the pulley; the connecting disk is connected to the transmission wheel and to the fan blades, so that the fan blades are rotatably connected to the rotating shaft.

[0015] In some embodiments, the resistance device includes a square tube, which is centered on the rotating shaft and is arranged on the connecting plate; the fan blade includes a pin shaft and a fixed seat, one end of the pin shaft is rotatably sleeved on the inner side of the square tube, and the other end is fixedly connected to the fixed seat, the fixed seat is symmetrical along a symmetry plane, and a slot is provided on the symmetry plane, and the blade is fixedly connected to the inner side of the slot; wherein the pin shaft is perpendicular to the rotating shaft, the first connecting rod is rotatably connected to the fixed seat, and the rotation center line is parallel to the pin shaft, and the rotation center line of the second connecting rod and the first connecting rod is parallel to the pin shaft.

[0016] In some embodiments, a driving wheel and a clutch are included. The driving wheel is rotationally connected to the bracket and is transmission-connected to the transmission wheel. The clutch is configured to transmission-connect or disconnect the pulley and the driving wheel.

[0017] In some embodiments, the bracket includes a mounting plate; the control assembly includes: a telescopic rod and a handle; the telescopic rod is movably inserted into the mounting plate and connected to the kit; the handle includes a connecting arm movably connected to the telescopic rod, an intermediate shaft circumferentially fixedly connected to the connecting arm, and a pulling arm circumferentially fixedly connected to the intermediate shaft, and the intermediate shaft is rotatably arranged on the mounting plate; wherein, when the pulling arm rotates, it drives the intermediate shaft and the connecting arm to rotate, and the connecting arm drives the telescopic rod to move, so that the kit moves along the axial direction of the rotating shaft.

[0018] In some embodiments, the control assembly includes a sensor configured to detect a rotation angle and a resistance of the fan blade.

[0019] In some embodiments, the control assembly includes a pull wire assembly and a handle, one end of the pull wire assembly is connected to the pull arm, and the other end is connected to the handle, and the handle is movably arranged on the armrest of the non-powered treadmill.

[0020] In some embodiments, the rotation path of the blade relative to the rotation axis includes a parallel position and a vertical position. In the parallel position, the blade is parallel to the projection plane, and in the vertical position, the blade is perpendicular to the projection plane.

[0021] In some embodiments, the resistance device is a wind resistance device, and the wind resistance device includes a protective cover, and the protective cover is arranged on the periphery of the fan blade.

[0022] In some embodiments, the resistance device is a water resistance device, and the water resistance device includes a water tank, and the fan blade is located in the water tank.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the unpowered treadmill provided by the utility model has the following beneficial effects:

[0025] When the unpowered treadmill is working, the user's feet act on the running belt, and the running belt drives the pulley to rotate. During this process, the blades of the resistance device rotate with the pulley. The rotation of the blades needs to overcome the resistance of airflow or water flow, thus increasing the resistance during running; wherein, the blades of the blades can change the projected area of ​​the blades on the radial plane of the shaft by rotating relative to the shaft, changing the size of the airflow resistance encountered during the rotation of the blades, and then adjusting the size of the running resistance. It can be seen that the unpowered treadmill of the utility model increases the running resistance through the resistance device, and the resistance device can adjust the size of the running resistance through the rotation of the blades, which can meet the use requirements of different users for different running resistance sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional diagram of the non-powered treadmill in the embodiment.

[0027] Figure 2 Schematic diagram of the connection between the treadmill body and the resistance device in the embodiment.

[0028] Figure 3 It is a front view of the resistance device in the embodiment.

[0029] Figure 4 for Figure 3 Cross-sectional view of section A.

[0030] Figure 5 It is a three-dimensional diagram of the resistance device in the embodiment.

[0031] Figure 6 It is an exploded view of the fan blades and the square tube in the embodiment.

[0032] Figure 7 Schematic diagram of the embodiment in which the resistance device is a wind resistance device.

[0033] Figure 8 It is a front view of the embodiment in which the resistance device is a water resistance device.

[0034] Reference numerals:

[0035] Treadmill body 1, running platform 11, pulley 12, running belt 13;

[0036] Resistance device 2, bracket 21, mounting plate 210, rotating shaft 22, fan blade 23, projection surface 200, blade 230, pin shaft 231, fixing seat 232, protective cover 233, water tank 234;

[0037] Connecting rod assembly 24, second connecting rod 241, first connecting rod 242, kit 25, wheel seat 26;

[0038] Control assembly 27, handle 270, telescopic rod 271, handle 272, connecting arm 273, intermediate shaft 274, pulling arm 275, pulling wire assembly 276, connecting piece 277, sensor 278, control board 279;

[0039] Transmission wheel 28, connection plate 29, square tube 290;

[0040] Driving wheel 3, clutch 4. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0042] Existing non-powered treadmills cannot adjust the size of the resistance, and are difficult to adapt to the use requirements of different users for different resistances.

[0043] In order to solve the above technical problems, this embodiment provides a non-powered treadmill, please refer to Figures 1 to 3 As shown, Figure 1 is a three-dimensional diagram of a non-powered treadmill in an embodiment, Figure 2 is a schematic diagram of the connection between the treadmill body and the resistance device in the embodiment, Figure 3 It is a front view of the resistance device in the embodiment.

[0044] A non-powered treadmill in this embodiment includes a treadmill body 1 and a resistance device 2 .

[0045] The treadmill body 1 includes a treadmill 11 , a pulley 12 rotatably connected to the treadmill 11 , and a treadbelt 13 connected to the pulley 12 .

[0046] The treadmill body 1 is used to realize the running function, wherein the treadmill 11 is the main frame of the treadmill body 11, the treadmill 11, the pulley 12 and the running belt 13 can use existing structures, and adjust the size, material and other parameters as needed, wherein the pulley 12 can be a wheel structure or a roller structure, and the pulley 12 can be rotatably connected to the treadmill 11 through a rotating shaft.

[0047] The resistance device 2 includes a bracket 21, a rotating shaft 22 and a fan blade 23. The rotating shaft 22 is rotatably connected to the bracket 21. The fan blade 23 is connected to the rotating shaft 22 and is arranged around the rotating shaft 22. The fan blade 23 is transmission-connected to the pulley 12 and includes a blade 230 that can rotate relative to the rotating shaft 22.

[0048] The above-mentioned resistance device 2 is used to increase the running resistance, wherein the rotating shaft 22 is used to install the fan blades 23, so that the fan blades 23 can rotate around the rotating shaft 22, and the fan blades 23 are driven to rotate when the pulley 12 rotates. The rotation of the fan blades 23 needs to overcome the resistance of airflow or fluids such as water, thereby increasing the running resistance. The number of fan blades 23 can be set as needed, and 4 are shown in the figure; in some embodiments, the rotating shaft 22 is fixed relative to the bracket 21. It should be noted that the rotation form of the blades 230 includes self-rotation and circumferential rotation around the rotating shaft 22, wherein the self-rotation can change the angle relative to the rotating shaft 22.

[0049] At the same time, when the blade 230 rotates relative to the rotating shaft 22, the projection area of ​​the blade 230 on the projection plane 200 increases or decreases, and the projection plane 200 is a radial plane of the rotating shaft 22, that is, the effective action area of ​​the blade 230 on the fluid is adjusted to change the resistance. It can be understood that although the force of the fluid on the blade 230 is not necessarily parallel or perpendicular to the projection plane 200, the projection area of ​​the blade on the projection plane 200 assists in explaining the change in the effective force area during the rotation of the blade 230 relative to the rotating shaft 22. The method of controlling the rotation of the blade 230 can be to directly control the rotation of the blade 230 relative to the rotating shaft 22, or to indirectly control the rotation of the blade 230 through other components. After the blade 230 rotates to adjust the resistance, it can be fixed relative to the rotating shaft 22 by bolts, damping structures, etc., so as to avoid rotating relative to the rotating shaft 22 again during the synchronous rotation with the rotating shaft 22.

[0050] When the non-powered treadmill of the above technical solution is working, the user's feet act on the running belt 13, and the running belt 13 drives the pulley 12 to rotate. In this process, the fan blades 23 of the resistance device 2 rotate with the pulley 12, and the running resistance is increased in turn; wherein, the blades 230 of the fan blades 23 can change the projected area of ​​the blades 230 on the radial plane of the rotating shaft 22 by rotating relative to the rotating shaft 22, that is, change the size of the airflow resistance encountered by the blades 230 during the rotation process, and then adjust the size of the running resistance. It can be seen that the non-powered treadmill of this embodiment increases the running resistance through the resistance device 2, and the resistance device 2 can adjust the size of the running resistance by rotating the blades 230, which can meet the use requirements of different users for different running resistance sizes.

[0051] See also Figure 3 , Figure 4 and Figure 5 As shown, Figure 4 for Figure 3 The cross-sectional view of section A in the figure. Figure 52 is a three-dimensional diagram of the resistance device in the embodiment. In one embodiment in which the blade 230 rotates relative to the shaft 22, the resistance device 2 includes: a connecting rod assembly 24, a sleeve 25, a wheel seat 26 and a control assembly 27. The connecting rod assembly 24 includes a first connecting rod 242 and a second connecting rod 241 that are rotatably connected to each other. The first connecting rod 242 is rotatably connected to the blade 230; the sleeve 25 is rotatably sleeved on the outer periphery of the shaft 22 and can move along the axial direction of the shaft 22. The wheel seat 26 is rotatably connected to the sleeve 25 and can rotate around the sleeve 25 and the shaft 22. For example, the wheel seat 26 is connected to the sleeve 25 through a bearing so that the wheel seat 26 can be moved in the sleeve. The wheel seat 26 is connected to the second connecting rod 241 at the same time, which can be welded or bolted. The wheel seat 26 can be disc-shaped and connected to the second connecting rod 241 corresponding to each fan blade 23 at the same time, so as to facilitate the simultaneous control of the movement of each second connecting rod 241; the control component 27 is movably arranged on the bracket 21 and connected to the kit 25, and is configured to control the kit 25 and the wheel seat 26 to move along the axial direction of the rotating shaft 22; wherein, when the kit 25 moves, the blade 230 is driven to rotate through the connecting rod assembly 24, so that the projection area of ​​the blade 230 on the projection surface 200 increases or decreases. During operation, the control component 27 controls the kit 25 to slide along the rotating shaft 22, and then the kit 25 drives the wheel seat 26 to move synchronously, and then the wheel seat 26 drives the second connecting rod 241 to move, and then the second connecting rod 241 drives the first connecting rod 242 to rotate, so that the first connecting rod 242 pulls or pushes the blade 230 to rotate relative to the rotating shaft 22, so as to adjust the angle of the blade 230; under this embodiment, the resistance device 2 can adjust the running resistance when the unpowered treadmill is working, that is, when the user is running, since the wheel seat 26 can move synchronously with the kit 25 and rotate around the rotating shaft 22 relative to the kit 25, it will not interfere with the rotation of the fan blade 23 even during the movement, so that the user can change the running resistance in real time during the running process.

[0052] It is understandable that the connecting rod assembly 24 may also include other connecting rods connected between the first connecting rod 242 and the second connecting rod 241 according to the situation, so as to convert the linear force of the wheel seat 26 into the rotational force of the blade 230.

[0053] See also Figure 4 and Figure 6As shown, further, in an embodiment in which the rotating shaft 22 is rotatably connected to the fan blades 23, the resistance device 2 includes: a transmission wheel 28 and a connection disk 29; the transmission wheel 28 is rotatably connected to the outer side of the rotating shaft 22, and is transmission-connected to the pulley 12, for transmitting resistance to the pulley 12; the connection disk 29 is connected to the transmission wheel 28, and can be integrally connected so as to be able to rotate synchronously with the transmission wheel 28, and the connection disk 29 is simultaneously connected to the fan blades 23, so that when the connection disk 29 rotates, the fan blades 23 can be driven to rotate, and the fan blades 23 are rotatably connected to the rotating shaft 22. During operation, the pulley 12 drives the transmission wheel 28 to rotate, and the transmission wheel 28 drives the connection disk 29 to rotate, and then the connection disk 29 drives the fan blades 23 to rotate around the rotating shaft 22.

[0054] See also Figure 5 and Figure 6 As shown, Figure 6 2 is an exploded view of the fan blade and the square tube in the embodiment. In one embodiment of the connection between the connecting plate 29 and the fan blade 23, a square tube 290 is provided on the connecting plate 29, and the square tube 290 is arranged around the connecting plate 29 with the rotating shaft 22 as the center; the fan blade 23 includes a pin 231 and a fixing seat 232, one end of the pin 231 is rotatably sleeved on the inner side of the square tube 290, and a shaft sleeve is provided in the square tube 290, and the pin 231 is rotatably connected to the shaft sleeve, and the other end of the pin 231 is fixedly connected to the fixing seat 232. In some embodiments, the pin 231 and the fixing seat 232 are connected as a whole by welding, the fixing seat 232 is symmetrical along a symmetric plane, and a slot is provided on the symmetric plane, and the blade 230 is fixedly connected to the inner side of the slot, so that the blade 230 is subjected to more uniform force; wherein, the pin 231 is perpendicular to the rotating shaft 22, the first connecting rod 242 is rotatably connected to the fixing seat 232, and the rotation center line is parallel to the pin 231, and the rotation center line of the second connecting rod 241 and the first connecting rod 242 is parallel to the pin 231. With such a configuration, when the wheel seat 26 moves, the second connecting rod 241 moves, so that the first connecting rod 242 can push or pull the fixing seat 232 to rotate around the pin 231, thereby driving the blade 230 to rotate around the pin 231.

[0055] See also Figure 4 and Figure 5As shown, in one embodiment of the above-mentioned control component 27, the control component 27 includes: a telescopic rod 271 and a handle 272; the bracket 21 includes a mounting plate 210; the telescopic rod 271 is movably arranged on the mounting plate 210 and is connected to the kit 25; the handle 272 includes a connecting arm 273 rotatably connected to the telescopic rod 271, an intermediate shaft 274 circumferentially fixedly connected to the connecting arm 273, and a pulling arm 275 circumferentially fixedly connected to the intermediate shaft 274, the intermediate shaft 274 is rotatably arranged on the mounting plate 210, such as the mounting plate 210 is rotatably connected to the intermediate shaft 274 through a convex portion; wherein, when the user controls the pulling arm 275 to rotate, the intermediate shaft 274 and the connecting arm 273 are driven to rotate, and the connecting arm 273 then drives the telescopic rod 271 to move, so that the kit 25 moves along the axial direction of the rotating shaft 22.

[0056] See also Figure 1 and Figure 4 As shown, further, the control component 27 includes a handle 270 and a wire assembly 276, one end of the wire assembly 276 is connected to the pull arm 275, and the other end is connected to the handle 270 set on the treadmill handrail. In this way, when running, the user can control the wire assembly 276 through the handle 270 to pull the handle 272, so that the handle 272 rotates, and then adjust the resistance, which is more convenient to use. Exemplarily, the handle 270 is rotatably connected to the handrail, and a damping structure is set between the handle and the handrail, and the damping structure is used to limit the position. The wire assembly 276 uses an existing brake wire assembly or a marine throttle wire, and one end connected to the handle 270 is also rotatably connected to the handrail through a universal joint. The installation method of the brake wire assembly or the marine throttle wire can be installed by those skilled in the art based on the connection relationship of the wire assembly 276 and combined with the specific structure of the treadmill, which will not be repeated here.

[0057] See also Figure 4 and Figure 5 As shown, in some embodiments, the control component 27 includes a sensor 278 for detecting the rotation angle and resistance of the fan blade 23. Exemplarily, the control component 27 also includes a connecting piece 277 and a control board 279; Exemplarily, the sensor 278 is a slider-type linear displacement sensor or a straight-slide potentiometer, the control board 279 is connected to the mounting plate 210, the sensor 278 and the control board 279 are electrically connected, and the two ends of the connecting piece 277 are respectively connected to the pull arm 275 and the slider of the sensor 278, so that when the pull arm 275 rotates, the connecting piece 277 is driven to move, and the connecting piece 277 pushes the slider on the sensor 278. The rotation angle of the fan blade 23 is detected by the movement stroke of the slider on the sensor 278, thereby detecting the size of the resistance generated by the fan blade 23.

[0058] It is understandable that the control component 27 can also fix the position of the handle 272 and the telescopic rod 271 by setting a damping structure, such as a nylon gasket, between the intermediate shaft 274 and the protrusion, thereby fixing the blade 230 at the adjusted angle.

[0059] See also Figure 1 and Figure 2 As shown, in this embodiment, a driving wheel 3 and a clutch 4 are included. The driving wheel 3 is rotatably connected to the bracket 21 and is transmission-connected to the transmission wheel 28, such as through a synchronous belt connection. The clutch 4 is disposed on the bracket 21 and is disposed between the driving wheel 3 and the pulley 12. The clutch 4 can connect the driving wheel 3 and the pulley 12 through a rotating shaft and is configured to transmission-connect or disconnect the pulley 12 and the driving wheel 3. An existing clutch can be used. The unpowered treadmill in this embodiment can control whether the resistance device 2 provides running resistance for the pulley 12 and the running belt 13 through the clutch 4, further improving the applicability of the product in running resistance.

[0060] See also Figure 7 As shown, Figure 7 The above-mentioned resistance device 2 can be a wind resistance device, which includes a protective cover 233, which is arranged on the periphery of the fan blade 23 to play a protective role. The wind resistance device works by overcoming the airflow resistance through the fan blade 23.

[0061] See also Figure 8 As shown, Figure 8 This is the front view of the resistance device in the embodiment which is a water resistance device. The resistance device 2 can also be a water resistance device, which includes a water tank 234. The fan blades 23 are located in the water tank 234. When the unpowered treadmill is running, the fan blades 23 need to overcome the water flow resistance in the water tank 234 to rotate. It can be understood that the water tank 234 can be connected to the rotating shaft 22 through a seal to prevent water from overflowing.

[0062] See also Figure 3 and Figure 7 As shown, in order to increase the resistance adjustment range of the blades 230 of the same size and shape, the rotation path of the blade 230 relative to the rotation shaft 22 includes a parallel position and a vertical position, such as Figure 7 As shown, in the parallel position, the blade 230 is parallel to the projection plane 200. At this time, the projection area of ​​the blade 230 on the projection plane 200 is the largest, and the resistance generated is the smallest; as shown in FIG. Figure 3 As shown, in the vertical position, the blade 230 is perpendicular to the projection plane 200. At this time, the projection area of ​​the blade 230 on the projection plane 200 is the smallest and the resistance generated is the largest.

[0063] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-powered treadmill, characterized in that: include: A treadmill body, the treadmill body comprising a treadmill, a pulley rotatably connected to the treadmill, and a running belt connected to the pulley; A resistance device, the resistance device comprising a bracket, a rotating shaft and a fan blade, the rotating shaft is connected to the bracket, the fan blade is rotatably connected to the rotating shaft and is arranged around the rotating shaft, the fan blade is transmission-connected to the pulley and comprises a blade that can rotate relative to the rotating shaft; When the blade rotates relative to the rotating shaft, the projection area of ​​the blade on the projection plane increases or decreases, and the projection plane is a radial plane of the rotating shaft.

2. The unpowered treadmill according to claim 1, characterized in that: The resistance device comprises: A connecting rod assembly comprises a first connecting rod and a second connecting rod rotatably connected to each other, wherein the first connecting rod is rotatably connected to the blade; A kit, which is rotatably sleeved on the outer periphery of the rotating shaft and can move in the axial direction of the rotating shaft; A wheel seat, the wheel seat is rotatably connected to the kit and can rotate around the rotating shaft, and the wheel seat is connected to the second connecting rod; A control assembly, movably disposed on the bracket and connected to the wheel seat, configured to control the kit and the wheel seat to move along the axial direction of the rotating shaft; When the wheel seat moves, the blade is driven to rotate through the connecting rod assembly, so that the projection area of ​​the blade on the projection plane increases or decreases.

3. The unpowered treadmill according to claim 2, characterized in that: The resistance device comprises: a transmission wheel and a connecting plate; The transmission wheel is rotatably connected to the outer side of the rotating shaft and is transmission-connected to the pulley; The connecting disk is connected to the transmission wheel and to the fan blades, so that the fan blades are rotationally connected to the rotating shaft.

4. The unpowered treadmill according to claim 3, characterized in that: The resistance device comprises a square tube, which is centered on the rotating shaft and is arranged around the connecting disk; The fan blade includes a pin shaft and a fixing seat, one end of the pin shaft is rotatably sleeved on the inner side of the square tube, and the other end is fixedly connected to the fixing seat, the fixing seat is symmetrical along a symmetric plane, and a slot is provided on the symmetric plane, and the blade is fixedly connected to the inner side of the slot; The pin is perpendicular to the rotating shaft, the first connecting rod is rotatably connected to the fixing seat, and the rotation center line is parallel to the pin, and the rotation center lines of the second connecting rod and the first connecting rod are parallel to the pin.

5. The unpowered treadmill according to claim 3, characterized in that: It comprises a driving wheel and a clutch. The driving wheel is rotationally connected with the bracket and is transmission-connected with the transmission wheel. The clutch is configured to transmission-connect or disconnect the pulley and the driving wheel.

6. The unpowered treadmill according to claim 2, characterized in that: The bracket includes a mounting plate; the control assembly includes: a telescopic rod and a handle; The telescopic rod is movably arranged on the mounting plate and connected to the kit; The handle comprises a connecting arm movably connected to the telescopic rod, an intermediate shaft circumferentially fixedly connected to the connecting arm, and a pulling arm circumferentially fixedly connected to the intermediate shaft, wherein the intermediate shaft is rotatably arranged on the mounting plate; When the pulling arm rotates, the intermediate shaft and the connecting arm are driven to rotate, and the connecting arm drives the telescopic rod to move, so that the kit moves along the axial direction of the rotating shaft.

7. The non-powered treadmill according to claim 6, characterized in that: The control assembly includes a sensor configured to detect a rotation angle and a resistance of the fan blade.

8. The non-powered treadmill according to claim 6, characterized in that: The control assembly comprises a pull wire assembly and a handle, one end of the pull wire assembly is connected to the pulling arm, and the other end is connected to the handle, and the handle is movably arranged on the armrest of the non-powered treadmill.

9. The non-powered treadmill according to claim 1, characterized in that: The rotation path of the blade relative to the rotating shaft includes a parallel position and a vertical position. In the parallel position, the blade is parallel to the projection plane, and in the vertical position, the blade is perpendicular to the projection plane.

10. The non-powered treadmill according to claim 1, characterized in that: The resistance device is a wind resistance device, which includes a protective cover, and the protective cover is arranged on the periphery of the fan blade; or the resistance device is a water resistance device, which includes a water tank, and the fan blade is located in the water tank.

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