Treadmill with pneumatic lift

Abstract

The application relates to the technical field of treadmills, in particular to a treadmill with a pneumatic lifting structure, which comprises a treadmill main body, a handrail part and a lifting part; the treadmill main body comprises a rack, and a running track is arranged on the rack; the lifting part comprises: a lifting frame, which is rotatably arranged on the rack; a pneumatic cylinder, which comprises a fixed end and an extension end, the fixed end is rotationally connected with the rack, and the extension end is rotationally connected with the lifting frame; and a locking part, which is arranged on the pneumatic cylinder and is used for locking the extension end of the pneumatic cylinder. The application has the advantages that: the application adopts the pneumatic cylinder as a lifting power source, compared with the traditional electric push rod, has the advantages of simple structure, low cost and low operation noise, meanwhile, through the arrangement of the locking part, the extension end of the pneumatic cylinder is mechanically locked after being lifted to the position, the problem that the running track shakes and cannot be long-term pressure-kept due to the compressibility of the gas in the pure pneumatic structure is overcome, and the perfect combination of low-noise adjustment and high-strength locking is realized.

Description

Technical Field

[0001] This application relates to the field of treadmill technology, and in particular to a treadmill with a pneumatic lifting structure. Background Technology

[0002] Currently, treadmills, as a common type of indoor fitness equipment, are usually equipped with an incline adjustment structure to meet the exercise needs of different users or simulate different road conditions. Most existing incline adjustment structures use electric push rods. Although electric push rods have high control precision, their transmission components (such as worm gears and lead screws) are prone to wear when subjected to high loads for a long time, resulting in a limited service life. In addition, they are noisy and affect the user experience.

[0003] To address the noise and cost issues associated with electric push rods, some treadmills have begun experimenting with pneumatic structures for lifting, such as using cylinders to directly lift the running platform. However, purely pneumatic structures have significant drawbacks in practical applications: cylinders rely on gas pressure to operate, and after adjusting to the desired incline, the running platform will float up and down when subjected to the impact of the user's running due to the compressibility of gas. Unlike mechanical locking structures, it cannot maintain a stable angle. If only the airtightness of the air circuit system is used to maintain pressure, the running platform will slowly sink if there is a minor leak in the pipeline or prolonged stress, which not only affects the training effect but also poses certain safety hazards.

[0004] To address this issue, this application proposes a treadmill with a pneumatic lifting structure. Summary of the Invention

[0005] The purpose of this application is to address at least one of the aforementioned technical deficiencies.

[0006] Therefore, one objective of this application is to provide a treadmill with a pneumatic lifting structure to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0007] To achieve the above objectives, one embodiment of this application provides a treadmill with a pneumatic lifting structure, including a treadmill body, a handrail section, and a lifting section; the treadmill body includes a frame, on which a running platform is mounted; the lifting section includes: a lifting frame, rotatably mounted on the frame; a cylinder, including a fixed end and a telescopic end, the fixed end being rotatably connected to the frame, and the telescopic end being rotatably connected to the lifting frame; a locking part, mounted on the cylinder, for locking the telescopic end of the cylinder; and a triggering part, mounted on the frame, linked with the cylinder and the running platform, for triggering the locking part to operate; when lifting adjustment is performed, the triggering part is synchronously driven to contact and engage with the running platform during the operation of the cylinder; when the lifting adjustment is completed and the running platform is in operation, the triggering part in contact with it is driven to operate, thereby triggering the locking part to lock the cylinder.

[0008] Preferably, in any of the above solutions, the handrail is fixedly connected to the machine frame.

[0009] Preferably, as described in any of the above embodiments, a crossbeam is fixed on the frame; and a support block is fixed at the end of the frame.

[0010] Preferably, as described in any of the above embodiments, the treadmill includes a frame having a longitudinally extending front end and a rear end; A front roller is rotatably mounted on the front end of the frame; a rear roller is rotatably mounted on the rear end of the frame; a running belt is an annular flexible belt that wraps around and is tensioned on the front and rear rollers to form a closed loop. The running belt has an upper running section and a lower return section. The upper running section is used to support the user and move along the upper surface of the frame; a running board is fixedly mounted on the running platform frame and located between the upper running section and the lower return section of the running belt. The upper surface of the running board is used to provide a smooth and supportive sliding support surface for the upper running section of the running belt when the running belt is stepped on by the user.

[0011] Preferably, the main body of the lifting frame is concave; a support frame is fixed to one end of the lifting frame, the support frame is provided with rollers, and a positioning frame is fixed to the other end of the lifting frame.

[0012] Preferably, in any of the above embodiments, a first rotating component is fixedly provided on the fixed end of the cylinder, the first rotating component is rotatably connected to the cross frame, and a second rotating component is fixedly provided on the telescopic end of the cylinder, the second rotating component is rotatably connected to the positioning frame.

[0013] Preferably, in any of the above embodiments, the triggering part includes: a side bracket fixed to the crossbar, with a shaft rotatably mounted on the side bracket; a disc fixed to the first rotating member, with teeth fixed in a partial area of ​​the disc; a gear fixed to the shaft, meshing with the teeth on the disc; a first bevel gear and a second bevel gear meshing with it, the first bevel gear being fixed to the shaft; a first lead screw rotatably mounted on the shaft, one end of the first lead screw being fixedly connected to the second bevel gear, and a first slider threaded onto the first lead screw; and a sliding frame fixed to the first slider.

[0014] Preferably, in any of the above embodiments, a limiting rod is fixed on the side support; the sliding frame is slidably disposed on the limiting rod, and a first upright plate, a second upright plate, and a third upright plate are fixed on the sliding frame.

[0015] Preferably, in any of the above embodiments, the triggering part further includes: a friction roller, on which a transmission rod is fixed, one end of which is rotatably mounted on a first upright plate and the other end of which is rotatably mounted on a second upright plate; a cylindrical rod, one end of which is rotatably mounted on a third upright plate and the other end of which is fixedly connected to the transmission rod, the cylindrical rod having a through groove; a counterweight, sleeved on the cylindrical rod, on which a guide block is fixed, the guide block being slidably disposed within the through groove; a limiting plate, movably mounted on the cylindrical rod, the limiting plate being rotatably connected to the counterweight, the limiting plate having a first contact piece fixedly mounted thereon; a spring, sleeved on the cylindrical rod, one end of which is fixedly connected to the limiting plate and the other end of which is fixedly connected to the third upright plate; and a positioning rod, fixed on the third upright plate, the positioning rod having a second contact piece fixedly mounted thereon.

[0016] Preferably, the locking part comprises: a sleeve, one end of which is fixed to the fixed end of the cylinder and the other end of which is sleeved on the telescopic end of the cylinder, the sleeve having a connecting groove; a second lead screw, rotatably mounted on the sleeve, the second lead screw having a second slider threaded on it; a stop block, slidably mounted in the connecting groove, one end of the stop block being fixedly connected to the second slider; a micro motor, fixed on the sleeve; a third bevel gear, and a fourth bevel gear meshing with it, the third bevel gear being fixed to the output end of the micro lead screw, and the fourth bevel gear being fixed to the second lead screw.

[0017] Compared with the prior art, the advantages and beneficial effects of this application are as follows: 1. This invention uses a cylinder as the lifting power source, which has the advantages of simple structure, low cost and low operating noise compared with traditional electric push rods. At the same time, by setting a locking part, the extension and retraction end of the cylinder is mechanically locked after lifting into place, which overcomes the problems of platform shaking and inability to maintain pressure for a long time caused by the compressibility of gas in pure pneumatic structures, and achieves a perfect combination of low noise adjustment and high strength locking.

[0018] 2. This application sets up a trigger unit to link the running state of the treadmill with the action of the locking unit. The locking unit is only triggered to lock the cylinder when the treadmill is running (i.e., when the user is using it), ensuring the structural stability during the movement. When the treadmill stops running, the locking unit may be in an unlocked state, which is convenient for the next incline adjustment. This design logic is precise and intelligent, which prevents users from exercising on an unlocked treadmill without their knowledge, and greatly improves safety.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of an embodiment according to this application; Figure 2 This is a second-view perspective perspective illustration according to an embodiment of this application; Figure 3 This is a partial schematic diagram according to an embodiment of this application; Figure 4 This is a schematic diagram of the hoisting frame connection according to an embodiment of this application; Figure 5 This is a schematic diagram of the shaft connection according to an embodiment of this application; Figure 6 According to the embodiments of this application Figure 5 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the first lead screw connection according to an embodiment of this application; Figure 8 According to the embodiments of this application Figure 7 Enlarged view of point B in the middle; Figure 9 This is a schematic diagram showing the extension of the cylinder extension end according to an embodiment of this application; Figure 10 This is a schematic diagram of the first lead screw connection according to an embodiment of this application.

[0021] In the diagram: 1. Treadmill body; 11. Frame; 12. Running platform; 13. Horizontal frame; 14. Support block; 15. Running belt; 2. Handrail; 3. Lifting section; 31. Lifting frame; 32. Cylinder; 3201. Fixed end; 3202. Telescopic end; 33. Support frame; 34. Roller; 4. Locking section; 41. Sleeve; 42. Second lead screw; 4201. Second slider; 43. Clamping block; 44. Micro electric motor. 5. Trigger unit, 51. Side bracket, 52. Shaft, 53. Disc, 5301. Tooth, 54. Gear, 55. Second lead screw, 5501. First slider, 5502. Sliding frame, 56. Friction roller, 5601. Transmission rod, 57. Cylindrical rod, 5701. Counterweight, 58. Limiting plate, 5801. First contact piece, 5802. Spring, 59. Positioning rod, 5901. Second contact plate. Detailed Implementation

[0022] like Figures 1 to 10 As shown, a treadmill with a pneumatic lifting structure includes a treadmill body 1, a handrail 2, a lifting part 3, a locking part 4, and a triggering part 5; When the lifting adjustment is performed, the trigger part 5 is driven to contact and cooperate with the running platform 12 in sync with the operation of the cylinder 32; When the lifting adjustment is completed, the running platform 12 runs and drives the triggering part 5 that is in contact with it to work, thereby triggering the locking part 4 to lock the cylinder 32.

[0023] Furthermore, the treadmill body 1 includes a frame 11, on which a running platform 12 is provided; The handrail 2 is fixedly connected to the machine frame 11; A crossbeam 13 is fixed on the frame 11; A support block 14 is fixed to the end of the frame 11, and the outer wall of the support block is covered with a rubber layer; The treadmill 12 includes: A frame having a vertically extending front end and a rear end; A front roller is rotatably mounted to the front end of the frame; The rear roller is rotatably mounted at the rear end of the frame; The running belt 15 is an annular flexible belt that wraps around and is tensioned on the front roller and the rear roller to form a closed loop. The running belt 15 has an upper running section and a lower return section. The upper running section is used to support the user and move along the upper surface of the frame. The running board is fixedly installed on the frame of the running platform 12 and located between the upper running section and the lower return section of the running belt 15. The upper surface of the running board is used to provide a smooth and supportive sliding support surface for the upper running section of the running belt 15 when the running belt 15 is stepped on by the user. In addition, there is a drive motor and transmission components. The drive motor drives the front roller via the transmission components, which in turn drives the running belt 15 to rotate.

[0024] Furthermore, the lifting unit 3 is used to adjust the slope of the running platform 12, including: The lifting frame 31 is rotatably mounted on the frame 11; The cylinder 32 includes a fixed end 3201 and a telescopic end 3202. The fixed end 3201 is rotatably connected to the frame 11, and the telescopic end 3202 is rotatably connected to the lifting frame 31. The main body of the lifting frame 31 is concave; A support frame 33 is fixed to one end of the lifting frame 31, and a roller 34 is provided on the support frame 33. A positioning frame is fixed to the other end of the lifting frame 31, and the positioning frame is rotatably connected to the telescopic end 3202 of the cylinder 32. A first rotating component is fixedly provided on the fixed end 3201 of the cylinder 32, and the first rotating component is rotatably connected to the cross frame 13. A second rotating component is fixedly provided on the telescopic end 3202 of the cylinder 32, and the second rotating component is rotatably connected to the positioning frame.

[0025] Furthermore, the triggering unit 5 is mounted on the frame 11 and is linked with the cylinder 32 and the running platform 12 to trigger the locking unit 4 to operate, including: A side bracket 51 is fixed to the cross frame 13, and a shaft 52 is rotatably mounted on the side bracket 51. A disc 53 is fixed on the first rotating member. A portion of the disc 53 is fixed with teeth 5301. The angle between the first and last teeth of the upper teeth 5301 of the disc 53 is 5 degrees. That is, when the disc 53 rotates 5 degrees, the teeth 5301 move from the first to the last position. In this device, when the lifting angle is 5 degrees, the upper teeth 5301 of the disc 53 move from the first to the last position. Gear 54 is fixed on shaft 52 and meshes with teeth 5301 on disk 53; A first bevel gear and a second bevel gear meshing with it, wherein the first bevel gear is fixed on the shaft 52; A first lead screw 55 is rotatably mounted on the shaft 52. One end of the first lead screw 55 is fixedly connected to the second bevel gear. A first slider 5501 is threaded onto the first lead screw 55. The sliding bracket 5502 is fixed on the first slider 5501; A limiting rod is fixed on the side bracket 51; The sliding frame 5502 is slidably mounted on the limiting rod. The sliding frame 5502 is fixed with a first upright plate, a second upright plate, and a third upright plate. The sliding frame 5502 moves along the limiting rod. Also includes: Friction roller 56, on which a transmission rod 5601 is fixed. One end of the transmission rod 5601 is rotatably mounted on the first vertical plate, and the other end is rotatably mounted on the second vertical plate. When the friction roller 56 contacts the running belt 15, the rotation of the running belt 15 can drive the friction roller 56 to rotate. A cylindrical rod 57 has one end rotatably mounted on the third vertical plate and the other end fixedly connected to the transmission rod 5601. A through groove is provided on the cylindrical rod 57. A counterweight 5701 is sleeved on a cylindrical rod 57. A guide block is fixed on the counterweight 5701, and the guide block is slidably disposed in the through groove. A limiting plate 58 is movably mounted on a cylindrical rod 57. The limiting plate 58 is rotatably connected to the counterweight 5701. A first contact piece 5801 is fixedly mounted on the limiting plate 58. Spring 5802 is sleeved on cylindrical rod 57. One end of spring 5802 is fixedly connected to limiting plate 58, and the other end is fixedly connected to third vertical plate. A positioning rod 59 is fixed to the third upright plate, and a second contact piece 5901 is fixedly provided on the positioning rod 59; When the friction roller 56 rotates, it drives the cylindrical rod 57 to rotate, which in turn drives the weight 5701 to move radially along the cylindrical rod 57. However, when the lifting adjustment is in progress, the running belt 15 will rotate at a very low idle speed. This rotational force cannot overcome the force of the spring 5802, thus causing the weight 5701 to be unable to move radially along the cylindrical rod 57.

[0026] The trigger unit 5, through the gear 54, bevel gear and screw slider mechanism, accurately converts the rotational motion of the cylinder 32 (i.e. during lift adjustment) into the linear displacement of the sliding frame 5502 along the running track direction. This purely mechanical linkage method has high reliability and does not require additional sensors or electronic control components, reducing the failure rate and enabling the sliding frame 5502 to always move accurately to the monitoring position in contact with the running belt following the lift angle of the running track. After the friction roller 56 in the triggering unit 5 is lifted into position, it contacts the running belt 15. The friction of the running belt 15 drives the friction roller 56 to rotate. Through the radial displacement of the counterweight 5701 under the action of centrifugal force, the "running" state of the running belt 15 is converted into a "closed" signal of the contact plate. This non-contact electrical detection method (actually the contact plate is closed) is ingenious and can accurately determine whether the running belt 15 is really in motion, avoiding false triggering.

[0027] Furthermore, the locking part 4 is provided on the cylinder 32 for locking the extension end 3202 of the cylinder 32, including: The sleeve 41 has one end fixed to the fixed end 3201 of the cylinder 32, and the other end sleeved on the telescopic end 3202 of the cylinder 32. The sleeve 41 has a connecting groove. The second lead screw 42 is rotatably mounted on the sleeve 41, and the second lead screw 42 is threaded with a second slider 4201. A retaining block 43 is slidably disposed in the connecting groove, and one end of the retaining block 43 is fixedly connected to the second slider 4201; A micro motor 44 is fixed on a sleeve 41. The micro motor 44 is electrically connected to the first contact piece 5801 and the second contact piece 5901, and the three are coordinated by a PLC controller. When the first contact piece 5801 and the second contact piece 5901 are in contact, the PLC controller controls the micro motor 44 to output a constant number of revolutions. When the first contact piece 5801 and the second contact piece 5901 are separated, the PLC controller controls the micro motor 44 to output a constant number of revolutions in the opposite direction. The third bevel gear and the fourth bevel gear meshing with it, the third bevel gear being fixed to the output end of the micro screw, and the fourth bevel gear being fixed to the second screw 42; The sleeve 41 is provided with a first connecting frame and a second connecting frame, which are respectively located at the micro motor 44 and the second lead screw 42, for protecting the micro motor 44 and the second lead screw 42. The micro motor 44 drives the clamping block 43 to clamp the telescopic end 3202 of the cylinder between the sleeve 41 and the clamping block 43.

[0028] A treadmill with a pneumatic lifting structure works on the following principle: 1) When adjusting the angle of the running platform 12, the lifting frame 31 is driven to move by the cylinder 32. During the movement of the lifting frame 31, the roller 34 first contacts the ground surface, and then the running platform 12 is adjusted by the drive of the lifting frame 31.

[0029] 2) During the lifting process, as the cylinder 32 extends and retracts, the first rotating component of the fixed end 3201 of the cylinder 32 rotates on the crossbeam 13. The first rotating component drives the disc 53 to rotate, and the rotation of the disc 53 drives the teeth 5301 on it to rotate. The teeth 5301 drive the first gear 54 to rotate, and the first gear 54 drives the shaft 52 fixed to it to rotate. The shaft 52 drives the first bevel gear to rotate, which in turn drives the second bevel gear to rotate. The rotation of the second gear 54 drives the first lead screw 55 to rotate, which in turn drives the first slider 5501 to move, which in turn drives the sliding frame 5502 to move, thereby driving the friction roller 56 to contact the running belt 15.

[0030] 3) After the lifting adjustment, when the user runs on the platform, the rotation speed of the running belt 15 increases. The rotation of the running belt 15 synchronously drives the friction roller 56 to rotate, which in turn drives the transmission rod 5601 and the cylindrical rod 57 to rotate. At this time, the cylindrical rod 57 drives the weight 5701 to rotate at high speed, so that the weight 5701 forms a radial centrifugal force on the cylindrical rod 57. At this time, the weight 5701 overcomes the force of the spring 5802 and drives the limiting plate 58 to drive the first contact piece 5801 to contact the second contact piece 5901. Then the micro motor 44 works to drive the second lead screw 42 to rotate. Through the second lead screw 42 and the second slider 4201, the clamping block 43 drives the cylinder 32 extension end 3202 to lock.

Claims

1. A treadmill with a pneumatic lifting structure, characterized in that: Including the treadmill body, handrails, and lifting section; The treadmill body includes a frame, and a running platform is provided on the frame; The lifting unit includes: The hoisting frame is rotatably mounted on the machine frame; A cylinder includes a fixed end and a telescopic end, wherein the fixed end is rotatably connected to the frame and the telescopic end is rotatably connected to the lifting frame; A locking part is provided on the cylinder and is used to lock the cylinder's extension and retraction end; A triggering unit, located on the frame, is linked to the cylinder and the running platform and is used to trigger the operation of the locking unit. When the lifting adjustment is performed, the trigger part is driven to contact and cooperate with the running platform in sync with the operation of the cylinder; After the lifting adjustment is completed, when the running platform is running, the triggering part that is in contact with it is activated, which in turn triggers the locking part to lock the cylinder.

2. The treadmill with a pneumatic lifting structure according to claim 1, characterized in that: The handrail is fixedly connected to the machine frame.

3. A treadmill with a pneumatic lifting structure according to claim 1, characterized in that: A crossbar is fixed on the frame; A support block is fixed at the end of the frame.

4. A treadmill with a pneumatic lifting structure according to claim 1, characterized in that: The treadmill includes: A frame having a vertically extending front end and a rear end; A front roller is rotatably mounted to the front end of the frame; The rear roller is rotatably mounted at the rear end of the frame; The running belt is a ring-shaped flexible belt that wraps around and is tensioned on the front roller and the rear roller to form a closed loop. The running belt has an upper running section and a lower return section. The upper running section is used to support the user and move along the upper surface of the frame. The running board is fixedly mounted on the running platform frame and located between the upper running section and the lower return section of the running belt. The upper surface of the running board is used to provide a smooth and supportive sliding support surface for the upper running section of the running belt when the running belt is stepped on by the user.

5. A treadmill with a pneumatic lifting structure according to claim 1, characterized in that: The main body of the lifting frame is concave; A support frame is fixed to one end of the lifting frame, and the support frame is equipped with rollers. A positioning frame is fixed to the other end of the lifting frame.

6. A treadmill with a pneumatic lifting structure according to claim 5, characterized in that: A first rotating component is fixedly provided on the fixed end of the cylinder, and the first rotating component is rotatably connected to the cross frame. A second rotating component is fixedly provided on the telescopic end of the cylinder, and the second rotating component is rotatably connected to the positioning frame.

7. A treadmill with a pneumatic lifting structure according to claim 3, characterized in that: The triggering unit includes: A side bracket is fixed to the cross frame, and a shaft is rotatably mounted on the side bracket; A disc is fixed to the first rotating component, and a portion of the disc is fixed with teeth. A gear is fixed to the shaft, and the gear meshes with the teeth on the disk. A first bevel gear and a second bevel gear meshing with it, wherein the first bevel gear is fixed on the shaft; A first lead screw is rotatably mounted on the shaft, one end of the first lead screw is fixedly connected to a second bevel gear, and a first slider is threaded onto the first lead screw. The sliding frame is fixed to the first slider.

8. A treadmill with a pneumatic lifting structure according to claim 7, characterized in that: A limiting rod is fixed on the side bracket; The sliding frame is slidably mounted on the limiting rod, and a first upright plate, a second upright plate, and a third upright plate are fixed on the sliding frame.

9. A treadmill with a pneumatic lifting structure according to claim 8, characterized in that: The triggering unit further includes: A friction roller, on which a transmission rod is fixed, one end of which is rotatably mounted on a first vertical plate and the other end of which is rotatably mounted on a second vertical plate; A cylindrical rod, one end of which is rotatably mounted on the third vertical plate, and the other end is fixedly connected to the transmission rod, and a through groove is provided on the cylindrical rod; A counterweight is fitted onto a cylindrical rod, and a guide block is fixed to the counterweight. The guide block is slidably disposed in a through groove. A limiting plate is movably mounted on a cylindrical rod, the limiting plate is rotatably connected to the counterweight, and a first contact piece is fixedly provided on the limiting plate; A spring is sleeved on a cylindrical rod, with one end of the spring fixedly connected to a limiting plate and the other end fixedly connected to a third vertical plate; A positioning rod is fixed to the third upright plate, and a second contact piece is fixedly provided on the positioning rod.

10. A treadmill with a pneumatic lifting structure according to claim 1, characterized in that: The locking mechanism includes: A sleeve, one end of which is fixed to the fixed end of the cylinder, and the other end of which is sleeved on the telescopic end of the cylinder, and the sleeve is provided with a connecting groove. The second lead screw is rotatably mounted on the sleeve, and the second lead screw is threaded with a second slider. A retaining block is slidably disposed in the connecting groove, and one end of the retaining block is fixedly connected to the second slider; A miniature motor, fixed on the frame; The third bevel gear and the fourth bevel gear meshing with it, the third bevel gear being fixed to the output end of the micro lead screw, and the fourth bevel gear being fixed to the second lead screw.

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