A non-powered treadmill

Abstract

The utility model discloses a kind of unpowered treadmills, it is related to fitness equipment technical field, to solve the problem of high machining precision and big maintenance investment brought by drum pipe, the unpowered treadmill includes: wheel group, wheel group includes main shaft and two belt pulleys, two belt pulleys are detachably arranged at the both ends of main shaft, and rotate around main shaft, one of the belt pulleys is equipped with one-way device between main shaft, and two belt pulleys are connected by at least two connecting rods;So set, by adopting detachable belt pulley design, machining precision can be significantly reduced, and this design allows individual installation and replacement belt pulley, without the need for complex operation to entire wheel group, thereby reducing the difficulty and cost of equipment maintenance.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and more specifically, to a non-powered treadmill. Background Technology

[0002] Currently, most treadmills on the market use one-way bearings to prevent the running belt from rotating in the opposite direction, thus ensuring user safety and improving the durability of the equipment. However, different installation positions and methods of one-way bearings place different requirements on the manufacturing process and precision.

[0003] Taking the treadmill disclosed in patent US10695606B2 as an example, its unidirectional device includes an inner ring and an outer ring. The inner ring is fixed to a first axis, while the outer ring is fixed to the roller tube. Pulleys are connected to both ends of the roller tube. This structural design allows the roller tube to rotate unidirectionally around the first axis while preventing it from rotating in the opposite direction. To ensure precise matching between the roller tube and the pulleys, specialized equipment must be used during manufacturing to fix the roller tube and pulleys, and the pulleys at both ends must be meticulously machined to achieve an integrated structure. This process demands extremely high precision; any minute machining error can lead to unstable treadmill operation or unnecessary noise. This can not only impair the user experience but also negatively impact the long-term durability of the equipment. Moreover, during later maintenance, if any part of the integrated structure of the roller tube and pulleys is damaged, the entire unit needs to be replaced, increasing the investment in equipment maintenance.

[0004] Therefore, how to solve the problems of high processing precision and high maintenance investment caused by roller tubes is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a non-powered treadmill that can significantly reduce the processing precision and reduce the investment in equipment maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A non-powered treadmill includes: a wheel assembly, the wheel assembly including a main shaft and two pulleys, the two pulleys being detachably disposed at both ends of the main shaft and rotating around the main shaft, one of the pulleys being provided with a one-way device between it and the main shaft, and the two pulleys being connected by at least two connecting rods.

[0008] Preferably, the two pulleys are rotatably connected to the main shaft via double-acting bearings.

[0009] Preferably, the one-way device is a one-way bearing, with the inner ring of the one-way bearing connected to the main shaft and the outer ring of the one-way bearing connected to the pulley.

[0010] Preferably, the pulley is provided with multiple connecting holes, which are evenly distributed on the same circumference of the pulley. The connecting rod is detachably disposed in the connecting hole and locked to the pulley by a locking member.

[0011] Preferably, it also includes a braking device for locking and unlocking the pulley.

[0012] Preferably, the braking device includes an adjusting handle assembly, a brake cable assembly, a pin assembly, and a locking disc. The adjusting handle assembly is connected to the pin assembly via the brake cable assembly. The pin assembly is detachably disposed in the positioning groove of the locking disc, and the locking disc is connected to a pulley.

[0013] Preferably, there are multiple positioning grooves, which are evenly distributed on the same circumference of the locking disc.

[0014] Preferably, the pin assembly includes a pin seat and a pin shaft, the pin seat is mounted on the main frame of the treadmill, and the pin shaft is movably mounted at one end of the pin seat.

[0015] Preferably, the brake cable assembly includes a fixing seat and a steel cable. The fixing seat is located at the other end of the pin seat, and one end of the steel cable passes through the fixing seat and is connected to the pin shaft.

[0016] Preferably, the adjustment handle assembly includes a housing and a handle disc, the handle disc being rotatably disposed in the housing, one side of the handle disc being connected to the other end of a steel cable, and the other side of the handle disc being provided with a toothed seat and a first elastic element, the first elastic element being used to provide a preload force for locking the toothed seat onto the handle disc.

[0017] The non-powered treadmill provided by this utility model includes a wheel assembly. Specifically, the wheel assembly includes a main shaft and two pulleys. The two pulleys are detachably located at both ends of the main shaft. This design reduces reliance on high-precision machining equipment and simplifies the machining process, as each component can be machined individually and then assembled. The detachable design of the pulleys simplifies the installation and maintenance process. If the pulleys need to be replaced or repaired, they can be quickly disassembled and reinstalled without complex operations on the entire wheel assembly. The two pulleys rotate around the main shaft, with the main shaft serving as the center of rotation, ensuring the rotational stability and consistency of the pulleys and ensuring the smooth operation of the running belt. One of the pulleys is equipped with a one-way device between itself and the main shaft to prevent the running belt from rotating in the opposite direction. This ensures that the running belt can only move in one direction (usually from the front to the back of the treadmill), improving the safety of the treadmill and preventing accidents and injuries that may be caused by the running belt rotating in the opposite direction. The two pulleys are connected by at least two linkages, which enhances the structural stability of the wheel assembly. This makes the treadmill more stable when bearing the user's weight and exercise impact, improving the overall stability and reliability. It also ensures that the pulleys remain synchronized during operation, reducing vibration and noise, thereby improving the overall performance of the treadmill and the user experience.

[0018] The non-powered treadmill designed in the above manner can significantly reduce the machining precision by adopting a detachable pulley design. This design also allows for the individual installation and replacement of pulleys without the need for complex operations on the entire pulley assembly, thereby reducing the difficulty and cost of equipment maintenance.

[0019] By incorporating a braking mechanism, the treadmill can be started and stopped by locking and unlocking the pulleys. Users can easily unlock the pulleys before starting their workout and securely lock them afterward, enhancing the user experience. Locking the pulleys when the treadmill is not in use prevents accidental slippage or starting, thus improving safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of the non-powered treadmill provided by this utility model;

[0022] Figure 2 This is a schematic diagram of the wheel assembly of the non-powered treadmill provided by this utility model;

[0023] Figure 3 This is a cross-sectional view of the wheel assembly of the non-powered treadmill provided by this utility model;

[0024] Figure 4 for Figure 1 A magnified view of a portion of the image;

[0025] Figure 5 An exploded view of the adjustment handle assembly of the non-powered treadmill provided by this utility model;

[0026] Figure 6 This is a schematic diagram of the pin assembly of the non-powered treadmill provided by this utility model;

[0027] Figure 7 This is a cross-sectional view of the pin assembly of the non-powered treadmill provided by this utility model.

[0028] Figure label:

[0029] 1-Spindle;

[0030] 2-Pulley;

[0031] 3-One-way device;

[0032] 4-Linkage;

[0033] 5-Double-direction bearing;

[0034] 6-Adjusting handle assembly, 61-Handle turntable, 62-Gear seat, 63-First elastic element, 64-First outer shell, 65-Second outer shell;

[0035] 7-Brake cable assembly, 71-Retainer, 72-Steel cable, 73-Outer jacket;

[0036] 8-Pin assembly, 81-Pin shaft, 82-Pin housing, 83-Pin screw, 84-Second elastic element;

[0037] 9-Locking disc;

[0038] 10-Main frame;

[0039] 11-Installation. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The core of this invention is to provide a non-powered treadmill that can significantly reduce processing precision and reduce equipment maintenance costs.

[0043] Please refer to Figure 1 , Figure 2 and Figure 3 A non-powered treadmill includes a wheel assembly.

[0044] Specifically, the wheelset includes a main shaft 1 and two pulleys 2. The two pulleys 2 are detachably located at both ends of the main shaft 1. This design reduces the reliance on high-precision machining equipment and simplifies the machining process, as each component can be machined individually and then assembled. The detachable design of the pulleys 2 simplifies the installation and maintenance process. If the pulleys 2 need to be replaced or repaired, they can be quickly disassembled and reinstalled without complicated operations on the entire wheelset. The two pulleys 2 rotate around the main shaft 1, with the main shaft 1 serving as the center of rotation, ensuring the rotational stability and consistency of the pulleys 2 and ensuring the smooth operation of the treadmill belt. One of the pulleys 2 is equipped with a one-way device 3 between itself and the main shaft 1, which prevents the running belt from rotating in the opposite direction and ensures that the running belt can only move in one direction (usually from the front end to the rear end of the treadmill). This improves the safety of the treadmill and prevents accidents and injuries that may be caused by the reverse rotation of the running belt. The two pulleys 2 are connected by at least two connecting rods 4, which enhances the structural stability of the wheel assembly. This makes the treadmill more stable when bearing the user's weight and exercise impact, improving the overall stability and reliability. It also ensures that the pulleys 2 remain synchronized during operation, reducing vibration and noise, thereby improving the overall performance of the treadmill and the user experience.

[0045] The non-powered treadmill designed in the above manner can significantly reduce the machining precision by adopting a detachable pulley 2 design. This design also allows for the individual installation and replacement of pulley 2 without the need for complex operations on the entire wheel assembly, thereby reducing the difficulty and cost of equipment maintenance.

[0046] In the above embodiment, the two pulleys 2 are rotatably connected to the main shaft 1 via bidirectional bearings 5.

[0047] It should be noted that the two-way bearing 5 allows the pulley 2 to rotate freely in both directions. This increases the flexibility of the treadmill's moving parts, reduces friction between the pulley 2 and the main shaft 1, thereby reducing noise and vibration during operation and extending the service life of the components. Because the two-way bearing 5 can evenly distribute the load on the pulley 2, it reduces premature wear caused by uneven load distribution, enhancing the overall durability of the treadmill. The design of the two-way bearing 5 may reduce the need for precision assembly, making maintenance simpler and reducing maintenance costs. The effective connection between the pulley 2 and the main shaft 1 improves the treadmill's operating efficiency, ensures smooth running of the running belt, and reduces energy loss.

[0048] The pulley 2 is equipped with an insert 11, which is connected to the corresponding one-way device 3 and the two-way bearing 5 to achieve unidirectional rotational connection between the pulley 2 and the main shaft 1. The use of the insert 11 ensures precise fit between the pulley 2 and the main shaft 1, reduces energy loss, and improves transmission efficiency.

[0049] In the above situation, the one-way device 3 is a one-way bearing, the inner ring of the one-way bearing is connected to the main shaft 1, and the outer ring of the one-way bearing is connected to the pulley 2.

[0050] Understandably, one-way bearings ensure that the running belt can only move in one predetermined direction, preventing reverse rotation and thus improving treadmill safety by reducing the risk of accidents caused by accidental reverse rotation of the running belt. Because the one-way bearing restricts the rotation direction of pulley 2, it helps reduce additional wear caused by reverse rotation, extending the service life of pulley 2 and main shaft 1. It also reduces noise caused by reverse rotation of pulley 2. One-way bearings are relatively easy to maintain because they are typically designed as low-maintenance components, which helps reduce long-term operating costs.

[0051] Furthermore, the pulley 2 is provided with multiple connecting holes, which are evenly distributed on the same circumference of the pulley 2. The connecting rod 4 is detachably installed in the connecting holes and is locked to the pulley 2 by a locking member.

[0052] It should be noted that the evenly distributed connecting holes ensure that the connecting rod 4 is evenly stressed on the pulley 2, reducing imbalance during operation, thereby reducing noise and vibration and improving the overall structural stability of the pulley assembly. If it is necessary to adjust the position of the pulley 2 or replace a damaged connecting rod 4, the multiple connecting holes provide multiple mounting points for easy adjustment or replacement. The use of locking mechanisms ensures a secure connection between the connecting rod 4 and the pulley 2, allowing for quick and easy installation or removal of the connecting rod 4, thus simplifying the assembly and maintenance process.

[0053] In the above embodiments, a braking device is also included, which is used to lock and unlock the pulley 2.

[0054] Understandably, the braking mechanism controls the treadmill's start and stop. Users can easily unlock pulley 2 before starting their workout and securely lock it afterward, enhancing the user experience. Locking pulley 2 when the treadmill is not in use prevents accidental slippage or malfunction, thus improving safety.

[0055] Please refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 The braking device includes an adjusting handle assembly 6, a brake cable assembly 7, a pin assembly 8, and a locking disc 9. The adjusting handle assembly 6 is connected to the pin assembly 8 through the brake cable assembly 7. The pin assembly 8 is detachably located in the positioning groove of the locking disc 9. The locking disc 9 is connected to the pulley 2.

[0056] It should be noted that the left and right pulleys 2 are connected by multiple connecting rods 4, achieving a rigid connection between the two pulleys 2 and ensuring the synchronization and stability of the pulleys 2 during operation. Furthermore, a locking disc 9 is fixed to one of the pulleys 2, forming a rigid connection with it, further enhancing the stability of the overall structure. Each pulley 2 has a double-sided bearing 5 installed in its hole. The outer ring of the double-sided bearing 5 is fixed to the inner ring of the pulley 2, while the inner ring of the double-sided bearing 5 is connected to the main shaft 1 passing through the pulley 2. The main shaft 1 is fixed by a fixing device on the treadmill main frame 10. This arrangement allows the two pulleys 2 to rotate freely around the main shaft 1 while maintaining a stable connection. The treadmill's wheel assembly can not only withstand the forces generated by the user during exercise but also ensure the smooth operation of the running belt, reducing friction and wear, thereby improving the treadmill's durability and the user's exercise experience. In addition, this structure facilitates maintenance and component replacement because the pulleys 2 and bearings are installed independently, allowing for repair or replacement without disassembling the entire wheel assembly.

[0057] The non-powered treadmill of this application includes two sets of wheels, front and rear, which, along with a series of bearings located between them, are securely mounted on a main frame 10. The treadmill's track assembly is designed as a closed, ring-shaped structure, supported by the front and rear wheels and the intermediate bearing sequence. Under the user's power drive, the track can perform a smooth circular motion around these support points.

[0058] It should be noted that during operation, users can adjust the handle assembly 6 and use the brake cable assembly 7 to pull the pin assembly 8, causing the pin assembly 8 to disengage from the positioning groove of the locking disc 9. This allows the wheelset to rotate freely, enabling users to begin their exercise. When the treadmill is not in use, users simply need to reverse the operation of the handle assembly 6 and use the brake cable assembly 7 to re-insert the pin assembly 8 into the positioning groove of the locking disc 9, locking the wheelset and preventing accidental start-up, thus ensuring equipment safety. By adjusting the handle assembly 6, users can easily control the brake device to lock and unlock the pulley 2 without complicated operating procedures. The brake cable assembly 7 provides a precise control mechanism, ensuring that the pin assembly 8 can stably insert or pull out of the positioning groove of the locking disc 9, achieving reliable locking and unlocking. The removable design of the pin assembly 8 allows for quick unlocking in emergencies, improving safety, while locking the treadmill when not in use to prevent accidental start-up. This design not only ensures the stability and safety of the treadmill during use but also provides a convenient operating method, allowing users to easily control the treadmill's start-up and locking status. In addition, this structure is designed to facilitate maintenance and repair, as all components are fixed on the main frame 10, and the design of the pin assembly 8 allows for quick plugging and unplugging operations.

[0059] In the above embodiment, multiple positioning grooves are provided, and the multiple positioning grooves are evenly distributed on the same circumference of the locking disc 9.

[0060] Understandably, evenly distributed positioning slots simplify the assembly process because they provide multiple potential assembly points, reducing the need for precise alignment and offering greater flexibility in treadmill setup and adjustments.

[0061] In a preferred embodiment, the pin assembly 8 includes a pin seat and a pin shaft 81. The pin seat is mounted on the main frame 10 of the treadmill, and the pin shaft 81 is movably mounted at one end of the pin seat. The brake cable assembly 7 includes a fixing seat 71 and a steel cable 72. The fixing seat 71 is located at the other end of the pin seat, and one end of the steel cable 72 passes through the fixing seat 71 and is connected to the pin shaft 81.

[0062] It should be noted that the pin holder includes a pin screw 83 with threads at both ends. One end is fixedly connected to the pin housing 82, and the other end is connected to the main frame 10 of the treadmill. The pin shaft 81 is connected to the steel cable 72 of the brake cable assembly 7, and can slide axially within the inner hole of the pin screw 83. Furthermore, a second elastic element 84 is disposed between the pin screw 83 and the pin shaft 81. Its function is to push the pin shaft 81 towards the locking disc 9. During use, the steel cable 72 disengages the pin shaft 81 from the positioning groove of the locking disc 9, allowing the pulley 2 to rotate normally. When not in use, the steel cable 72 can be released, and the preload of the second elastic element 84 pushes the pin shaft 81 into the positioning groove of the locking disc 9. The fixing seat 71 rigidly connects the brake cable sheath 73 to the pin housing 82, ensuring that the brake cable 72 can move freely within the brake cable sheath 73. With the combined action of the brake cable 72 and the second elastic element 84, the pin shaft 81 can be precisely controlled to achieve its extension and retraction. This design not only ensures that the treadmill can be safely locked when needed, but also allows users to easily unlock the treadmill when ready to use it. This structural design improves the convenience and safety of treadmill operation, and also facilitates maintenance and repair, as each part of the pin assembly 8 can be operated and replaced independently.

[0063] During operation, the user can adjust the handle assembly 6 and use the steel cable 72 in the brake cable assembly 7 to pull the pin shaft 81, causing the pin shaft 81 to disengage from the locking disc 9. Once the pin shaft 81 is pulled out, the wheelset can rotate freely, allowing the user to begin their exercise. When the treadmill is not in use, the user simply reverses the handle operation to loosen the steel cable 72. At this time, the second elastic element 84 in the pin assembly 8 will push the pin shaft 81 back into the positioning groove of the locking disc 9, locking the wheelset and preventing accidental start-up of the treadmill, ensuring the safety of the equipment.

[0064] The pin screw 83, fixed to the main frame 10, provides a stable base, ensuring the stability and reliability of the pin shaft 81 during movement. The mobility of the pin shaft 81 allows users or automated systems to easily control the extension and retraction of the pin, enabling the treadmill's locking and unlocking functions. Precise control of the pin's movement ensures the treadmill is securely locked when not in use, preventing accidental start-up and improving safety. The design of the pin assembly 8 allows for easy maintenance and replacement, as the pin shaft 81 can be easily removed from the pin screw 83 for convenient inspection and repair.

[0065] In the above embodiment, the adjusting handle assembly 6 includes a housing and a handle disc 61. The handle disc 61 is rotatably disposed in the housing. One side of the handle disc 61 is connected to the other end of the steel cable 72, and the other side of the handle disc 61 is provided with a toothed seat 62 and a first elastic element 63. The first elastic element 63 is used to provide a preload force to lock the toothed seat 62 onto the handle disc 61. The housing includes a first outer shell 64 and a second outer shell 65, and the first elastic element 63 is a wave washer.

[0066] It should be noted that both the wave washer and the toothed seat 62 are mounted and fixed on the cylindrical structure of the first housing 64. These two components can move axially, but are restricted by the shape of the hole in the toothed seat 62, allowing only linear movement and preventing rotation, thus ensuring precise positioning and motion control. The fixing seat 71 of the brake cable assembly 7 secures the other end of the outer sleeve 73 of the brake cable assembly 7 to the second housing 65, while the other end of the steel cable 72 of the brake cable assembly 7 is embedded in the handle disc 61. When the handle disc 61 rotates, it can extend and retract the steel cable 72 of the brake cable assembly 7, thereby controlling the treadmill. Furthermore, bolts pass through the second housing 65, the handle disc 61, the toothed seat 62, and the wave washer, and are fixedly connected to the first housing 64. This structural design restricts the movement of the handle disc 61, allowing it to rotate only in the circumferential direction. A certain number of set screws are locked onto the handle disc 61, extending towards the toothed seat 62 to form protrusions that contact the tooth gaps of the toothed seat 62. When the handle dial 61 rotates, the elastic force of the wave washer causes the toothed seat 62 to move axially, approaching the handle dial 61 and locking the set screw, thus fixing the position of the handle dial 61. This design not only improves the stability and safety of treadmill operation but also ensures that users can easily and accurately control the locking and unlocking states of the treadmill during use. Through precise component positioning and motion control, it provides users with a reliable, easy-to-operate, and convenient-to-maintain fitness device.

[0067] The handle dial 61 is designed to allow users to control the steel cable 72 with a simple rotation, enabling the locking and unlocking of the treadmill and improving operational comfort and convenience. The combination of the handle dial 61 and the housing provides a stable structure, ensuring component stability during operation and reducing wobbling and wear. The cooperation between the toothed seat 62 and the first elastic element 63 provides precise locking force, ensuring the stability of the handle dial 61 in the locked position and preventing accidental unlocking. The preload provided by the first elastic element 63 ensures that the toothed seat 62 firmly locks the handle dial 61, maintaining the treadmill in a locked state even during exercise, thus improving safety. The design of the handle dial 61 and toothed seat 62 allows for easy maintenance and adjustment; replacement of the first elastic element 63 or other maintenance work can be performed quickly.

[0068] The first elastic element 63 and the second elastic element 84 can be springs. Springs generate restoring force after being subjected to external force, ensuring that the treadmill components return to their initial positions. The elastic properties of springs help absorb the impact and vibration generated during exercise, thereby reducing noise and wear and improving the user's exercise experience.

[0069] When the user moves the handle dial 61, the steel cable 72 of the brake cable assembly 7 moves accordingly, thereby actuating the pin shaft 81 to lock or release the wheelset, thus controlling the treadmill's operating status. Furthermore, when the handle assembly is replaced with a telescopic motor and a rotary motor, only authorized users, after verification via card swiping or facial recognition, will have the motors and other actuators pull the pin shaft 81 via the steel cable 72, disengaging it from the locking disc 9 and releasing the wheelset, allowing the equipment to be used. Additionally, when the system detects that the treadmill's speed has been zero for a period of time, the motors and other actuators will again extend the pin shaft 81 via the steel cable 72 and relock the wheelset, restricting equipment use, ensuring safety, and preventing unauthorized use. This design not only provides a simple and intuitive manual operation method but also allows for control via an automated system, improving the treadmill's convenience and safety. Through this intelligent control mechanism, the treadmill can adapt to different usage environments and needs, while ensuring effective management and maintenance of the equipment.

[0070] In summary, the non-powered treadmill provided by this utility model, through the integrated braking device and one-way bearing, can easily control the locking and unlocking of the treadmill, improving the convenience of operation, ensuring that the running belt can only move in one direction, preventing accidental reverse rotation, thereby improving the safety of users during use. The detachable pulley 2 and modular component design make the processing and maintenance process simpler and faster, reducing maintenance costs.

[0071] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0073] The present invention provides a detailed description of a non-powered treadmill. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A passive runner, characterized in that, include: The wheel assembly includes a main shaft (1) and two pulleys (2). The two pulleys (2) are detachably located at both ends of the main shaft (1) and rotate around the main shaft (1). One of the pulleys (2) is provided with a one-way device (3) between it and the main shaft (1). The two pulleys (2) are connected by at least two connecting rods (4).

2. The non-powered treadmill according to claim 1, characterized in that, The two pulleys (2) are rotatably connected to the main shaft (1) via a double-direction bearing (5).

3. The non-powered treadmill according to claim 1, characterized in that, The one-way device (3) is a one-way bearing. The inner ring of the one-way bearing is connected to the main shaft (1), and the outer ring of the one-way bearing is connected to the pulley (2).

4. The non-powered treadmill according to claim 1, characterized in that, The pulley (2) is provided with multiple connecting holes, which are evenly distributed on the same circumference of the pulley (2). The connecting rod (4) is inserted into the connecting hole and locked to the pulley (2) by a locking member.

5. The non-powered treadmill according to any one of claims 1-4, characterized in that, It also includes a braking device for locking and unlocking the pulley (2).

6. The non-powered treadmill according to claim 5, characterized in that, The braking device includes an adjusting handle assembly (6), a brake cable assembly (7), a pin assembly (8), and a locking disc (9). The adjusting handle assembly (6) is connected to the pin assembly (8) through the brake cable assembly (7). The pin assembly (8) is detachably disposed in the positioning groove of the locking disc (9). The locking disc (9) is connected to the pulley (2).

7. The non-powered treadmill according to claim 6, characterized in that, The positioning groove is provided in multiple ways, and the multiple positioning grooves are evenly distributed on the same circumference of the locking disc (9).

8. The non-powered treadmill according to claim 7, characterized in that, The pin assembly (8) includes a pin seat and a pin shaft (81). The pin seat is mounted on the main frame (10) of the treadmill, and the pin shaft (81) is movably mounted at one end of the pin seat.

9. The non-powered treadmill according to claim 8, characterized in that, The brake cable assembly (7) includes a fixing seat (71) and a steel cable (72). The fixing seat (71) is located at the other end of the pin seat body. One end of the steel cable (72) passes through the fixing seat (71) and is connected to the pin shaft (81).

10. The non-powered treadmill according to claim 9, characterized in that, The adjusting handle assembly (6) includes a housing and a handle disc (61). The handle disc (61) is rotatably disposed in the housing. One side of the handle disc (61) is connected to the other end of the steel cable (72). The other side of the handle disc (61) is provided with a toothed seat (62) and a first elastic element (63). The first elastic element (63) is used to provide a preload force to lock the handle disc (61) with the toothed seat (62).

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