An electric treadmill capable of automatically adjusting speed

Abstract

This invention discloses an automatically speed-adjustable electric treadmill, comprising a treadmill body. Key technical features include a connecting plate connected to the bottom of the treadmill body via a buffer mechanism; a base plate at the bottom of the connecting plate; a slide rail fixed to the base plate; a slider slidably mounted within the slide rail; a driving mechanism on the base plate for driving the slider; first connecting rods hinged to the side walls of the slider; second connecting rods hinged to the outer wall of the slide rail; the first and second connecting rods hinged together; a circular shaft rotatably connected to the two second connecting rods; a fixed frame fixed to the bottom of the connecting plate; a through groove for the circular shaft to slide through the side wall of the fixed frame; a rotating seat fixed to the side wall of the treadmill body; a rotating groove within the rotating seat; a rotating arm rotatably mounted within the groove; an adjustment mechanism within one side of the groove; a retractable support on the rotating arm; and adjusting arms on both sides of the support, with handrails fixedly connected to the adjusting arms. This invention allows for adjustment of the running incline, and the handrails provide safety and are adjustable in position.

Description

Technical Field

[0001] This invention relates to the field of treadmill technology, specifically to an electric treadmill with automatic speed adjustment. Background Technology

[0002] Treadmills are exercise equipment used in homes and gyms for running practice. Treadmills have become a popular fitness tool. They have a wide speed range and use belt drive as their working mechanism. Belt drive has a simple structure, can mitigate load impact, and runs smoothly without noise. The control panel of existing electric treadmills has multiple windows. However, both the acceleration and deceleration buttons need to be manually adjusted by the user.

[0003] The invention disclosed in CN104307140B is an electric treadmill, which includes: a running belt tension detector for detecting the running belt tension in front of and behind the user's foot landing point; and a motor speed controller connected to the running belt tension detector and the treadmill's motor for automatically controlling the motor speed based on the output signal of the running belt tension detector. The automatic speed control device of this invention can automatically determine the user's acceleration and deceleration needs and adjust accordingly without any manual operation, thereby eliminating the inconvenience and associated dangers of manual operation.

[0004] The existing solutions have the following problems: the device does not have handrails, which may pose a safety hazard to runners, and it can only simulate running on flat ground, which cannot meet the different incline requirements of runners. Summary of the Invention

[0005] The purpose of this invention is to provide an electric treadmill with automatic speed adjustment to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an electric treadmill with automatic speed adjustment, comprising a treadmill body and a buffer mechanism. A connecting plate is connected to the bottom of the treadmill body via the buffer mechanism. A base plate is provided at the bottom of the connecting plate. One side of the base plate is hinged to the bottom of the connecting plate. A slide rail is fixedly provided at the middle position of the end of the base plate away from the hinged connection with the connecting plate. A slider is slidably disposed within the slide rail. A driving mechanism for driving the slider is provided on the base plate. First connecting rods are hinged to the two side walls of the slider, and second connecting rods are hinged to the outer wall of the slide rail. The end of the first connecting rod away from the slider is connected to... The second link is hinged, and the ends of the two second links away from the slide are rotatably connected to a round shaft. A fixed frame is fixedly provided at the bottom of the connecting plate. A through groove is opened through the side wall of the fixed frame for the round shaft to slide. A rotating seat is symmetrically fixedly provided on the side wall of the treadmill body. A rotating groove is opened in the rotating seat. A rotating arm is rotatably connected in the rotating groove. An adjustment mechanism for controlling the rotation angle of the rotating arm is provided in one side of the rotating groove. A telescopic bracket is provided on the rotating arm. Adjustable arm grooves are symmetrically opened on the side walls of the bracket. Adjustable arms with adjustable positions are provided in the adjustable arm grooves. Handrails are fixedly connected to the two adjustable arms on one side.

[0007] Preferably, the buffer mechanism includes a buffer spring, a damping piston, and a buffer pad. The buffer spring is fixedly connected to the bottom of the treadmill body and the connecting plate on both sides and is evenly distributed in multiple manner. The damping piston is fixedly connected to the bottom of the treadmill body and the connecting plate on both ends. The buffer spring is sleeved on the damping piston, and the buffer pad is disposed between the buffer springs and fixedly connected to the connecting plate.

[0008] Preferably, the driving mechanism includes a motor, a fixed base, and a lead screw. The motor is fixedly mounted on the base plate and its output end is fixedly connected to the lead screw. The fixed base is fixedly mounted on the base plate and rotatably connected to the lead screw. The slider has a threaded groove for the lead screw to pass through and is threadedly connected to the lead screw.

[0009] Preferably, the inner wall of the slide is symmetrically provided with limiting grooves, the side wall of the slider is fixedly provided with a limiting block located in the limiting groove and slidably connected to the limiting groove, the outer wall of the first connecting rod is in contact with the inner wall of the second connecting rod, the outer wall of the second connecting rod is in contact with the inner wall of the fixed frame, and the two ends of the round shaft are fixedly provided with limiting discs in contact with the outer wall of the fixed frame.

[0010] Preferably, the adjusting mechanism includes a locking block, a locking block spring, a push block, a push rod, and a push plate. A rotating column groove is symmetrically formed on the inner wall of one side of the rotating groove. A rotating column rotatably connected to the rotating column groove is fixedly provided on the side wall of the rotating arm. A rotating column groove and a locking groove are coaxially formed on the inner wall of the rotating groove on the other side. A rotating column rotatably connected to the rotating column groove is fixedly provided on one side wall of the rotating arm. A locking block groove is coaxially formed on the side of the rotating arm near the locking groove. The locking block spring is fixedly provided at the bottom of the locking block groove. The locking block is located in the locking block groove and fixedly connected to the locking block spring. The push block is slidably disposed in the locking groove. The end of the push rod away from the locking block is fixedly connected to the end of the push block and passes through the side wall of the rotating seat. The end of the push rod outside the rotating seat is fixedly connected to the push plate.

[0011] Preferably, the lock block is a gear block, the cross-sectional shape of the lock block groove and the lock groove is consistent with the cross-sectional shape of the lock block, and the lock block fits into the inner wall of the lock block groove and the lock groove.

[0012] Preferably, a return spring is fixedly provided on the outer wall of the rotating seat and fixedly connected to the push plate. The return spring is sleeved on the push rod, and a retaining ring is fixedly provided on one end of the push plate near the rotating seat and outside the return spring.

[0013] Preferably, the top of the rotating arm is provided with a sliding groove, one end of the bracket is fixedly provided with a sliding column that is inserted into and slidably connected to the sliding groove, the end of the bracket away from the sliding column is rotatably connected to a screw that is rotatably connected to the sliding groove via a bearing, an adjusting column is rotatably provided on the rotating arm where the screw is located, a rotating ring groove is provided on the rotating arm outside the sliding groove, a limiting ring groove is provided on the inner wall of the bottom of the rotating ring groove, a rotating ring is fixedly provided at the bottom of the adjusting column and rotatably connected to the rotating ring groove, a limiting ring is fixedly provided on the outer wall of the rotating ring and rotatably connected to the limiting ring groove, and a threaded hole is provided on the adjusting column that is coaxial with the sliding groove and threadedly connected to the screw.

[0014] Preferably, the adjusting arm groove is slidably connected to the adjusting arm. Multiple slots are evenly distributed on the adjusting arm along its length. Two adjusting arm grooves on one side have control grooves on their opposing inner walls that are connected. A control block is slidably disposed within the control groove. A return groove is formed on the side wall of the control block groove. A return spring is fixedly disposed on the inner wall of the return groove near the adjusting arm groove. A return block is fixedly connected to the return spring, slidably connected to the return groove, and fixedly connected to the side wall of the control block. A pressure block groove is formed on the inner wall of the control groove. A pressure block is provided in the pressure block groove to allow the control block to slide. A locking block for engaging the slot is fixedly disposed at the end of the control block located outside the control groove. A clearance groove for the locking block to slide into is formed at the end of the adjusting arm groove away from the control groove. A connecting groove is formed on the adjusting arm that connects all the slots and is slidably connected to the control block.

[0015] Specifically, the two control blocks abut at their closest ends, and the closest ends of the two control blocks are inclined surfaces that abut against the pressure block. The end of the pressure block away from the control block is fixedly connected to a pressure column that penetrates the outer wall of the bracket. The end of the pressure column located outside the bracket is fixedly connected to a pressure plate. The cross-section of the card block is rectangular and fits tightly with the card slot. The cross-section of the control block is square and its length is the same as the width of the card block. The side length of the control block is the same as the width of the connecting slot.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] By incorporating a buffer spring, damping piston, buffer pad, and connecting plate, the buffer spring can cushion the impact on the running board when running on the treadmill body. The damping piston can slowly release the energy compressed by the buffer spring, thereby preventing the running board from rebounding quickly and ensuring the safety of the runner. It can reduce the impact on the runner's knees. The buffer pad can prevent the rigid impact generated when the damping piston is fully compressed, so that the running board always maintains flexible cushioning, thereby protecting the runner.

[0018] By setting up slides, sliders, lead screws, motors, first connecting rods, second connecting rods, round shafts, fixed frames, through grooves, limit grooves, limit blocks, and limit discs, the angle of the treadmill body is adjusted by the motor to achieve the slope adjustment effect of the running board, meeting the running slope needs of different people.

[0019] By incorporating a rotating base, rotating groove, rotating arm, rotating column groove, rotating column, locking groove, locking block groove, locking block spring, locking block, push block, push rod, push plate, and return spring, pressing the push plate adjusts the angle of the rotating arm. By incorporating an adjusting column, threaded hole, screw, rotating ring, limit ring, sliding column, and sliding groove, rotating the adjusting column adjusts the height of the support. By incorporating an adjusting arm groove, locking groove, clearance groove, control groove, connecting groove, control block, return spring, return block, pressure block, pressure column, and pressure plate, pressing the pressure plate adjusts the position of the adjusting arm within the adjusting arm groove. Through adjusting the angle of the rotating arm, the height of the support, and the position of the adjusting arm within the adjusting arm groove, the handrail can be adjusted in multiple directions to meet the runner's positional needs and ensure running safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the appearance of this embodiment;

[0022] Figure 2 This is an enlarged view of section A in this embodiment;

[0023] Figure 3 This is a schematic diagram of the appearance from another perspective of this embodiment;

[0024] Figure 4 This is an enlarged view of section B in this embodiment;

[0025] Figure 5 This is a schematic diagram of the bottom angle adjustment area in this embodiment;

[0026] Figure 6 This is a sectional view of the side support in this embodiment;

[0027] Figure 7 This is an enlarged view of section C in this embodiment;

[0028] Figure 8 This is a cross-sectional view of the locking block in this embodiment;

[0029] Figure 9 This is an enlarged view of section D in this embodiment;

[0030] Figure 10 This is an enlarged view of point E in this embodiment;

[0031] Figure 11 This is a schematic diagram of the handrail structure in this embodiment.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Treadmill body; 2. Cushioning spring; 3. Damping piston; 4. Cushioning pad; 5. Connecting plate; 6. Base plate; 7. Slider; 8. Lead screw; 9. Motor; 10. Fixed seat; 11. Slide rail; 12. First connecting rod; 13. Second connecting rod; 14. Round shaft; 15. Fixed frame; 16. Through groove; 17. Limiting plate; 18. Limiting groove; 19. Limiting block; 20. Rotating seat; 21. Rotating groove; 22. Rotating arm; 23. Rotating column groove; 24. Rotating column; 25. Locking groove; 26. Locking block groove; 27. Locking block spring; 28. Locking block; 29. ​​Push block; 30. Push rod 31. Push plate; 32. Return spring; 33. Retaining ring; 34. Bracket; 35. Sliding column; 36. Sliding groove; 37. Screw; 38. Adjusting column; 39. Threaded hole; 40. Rotary ring groove; 41. Rotary ring; 42. Limiting ring groove; 43. Limiting ring; 44. Adjusting arm groove; 45. Adjusting arm; 46. Handrail; 47. Slot; 48. Control groove; 49. Control block; 50. Slot; 51. Clearance groove; 52. Pressure block groove; 53. Pressure block; 54. Pressure column; 55. Pressure plate; 56. Return groove; 57. Return spring; 58. Return block; 59. Connecting groove. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-11 This invention provides a technical solution: an electric treadmill with automatic speed adjustment, including a treadmill body 1 and a buffer mechanism. A connecting plate 5 is connected to the bottom of the treadmill body 1 via the buffer mechanism. A base plate 6 is provided at the bottom of the connecting plate 5. One side of the base plate 6 is hinged to the bottom of the connecting plate 5. A slide rail 11 is fixedly provided at the middle position of the end of the base plate 6 away from the hinged end to the connecting plate 5. A slider 7 is slidably disposed within the slide rail 11. A driving mechanism for driving the slider 7 to slide is provided on the base plate 6. First connecting rods 12 are respectively hinged to the two side walls of the slider 7, and second connecting rods 13 are respectively hinged to the outer wall of the slide rail 11. The end of the first connecting rod 12 away from the slider 7 is hinged to the second connecting rod 13. The end of the connecting rod 13 away from the slide rail 11 is rotatably connected to a round shaft 14. A fixed frame 15 is fixedly provided at the bottom of the connecting plate 5. A through groove 16 for the round shaft 14 to slide is provided through the side wall of the fixed frame 15. A rotating seat 20 is symmetrically fixed on the side wall of the treadmill body 1. A rotating groove 21 is provided in the rotating seat 20. A rotating arm 22 is rotatably connected in the rotating groove 21. An adjustment mechanism for controlling the rotation angle of the rotating arm 22 is provided in one side of the rotating groove 21. A telescopic bracket 34 is provided on the rotating arm 22. Adjustable arm grooves 44 are symmetrically provided on the side walls of the bracket 34. Adjustable arms 45 with adjustable positions are provided in the adjustable arm grooves 44. Handrails 46 are fixedly connected to the two adjustable arms 45 on one side.

[0036] Specifically, the cushioning mechanism includes a cushioning spring 2, a damping piston 3, and a cushioning pad 4. Multiple cushioning springs 2 are fixedly connected to the bottom of the treadmill body 1 and the connecting plate 5 on both sides, respectively. The damping piston 3 is fixedly connected to the bottom of the treadmill body 1 and the connecting plate 5 on both ends. The cushioning spring 2 is sleeved on the damping piston 3. The cushioning pad 4 is located between the cushioning springs 2 and fixedly connected to the connecting plate 5. When running on the treadmill body 1, the cushioning spring 2 can buffer the impact on the running board. The damping piston 3 can slowly release the energy compressed by the cushioning spring 2, thereby preventing the running board from rebounding rapidly and ensuring the safety of the runner. It can reduce the impact on the runner's knees. The cushioning pad 4 can prevent the rigid impact generated when the damping piston 3 is fully compressed, so that the running board always maintains flexible cushioning, thereby protecting the runner.

[0037] Specifically, the drive mechanism includes a motor 9, a fixed base 10, and a lead screw 8. The motor 9 is fixedly mounted on the base plate 6 and its output end is fixedly connected to the lead screw 8. The fixed base 10 is fixedly mounted on the base plate 6 and rotatably connected to the lead screw 8. The slider 7 has a threaded groove for the lead screw 8 to pass through and is threadedly connected to the lead screw 8. The motor 9 drives the lead screw 8 to rotate, thereby causing the slider 7 to slide in the slide rail 11. Through the hinge between the first connecting rod 12 and the slide rail 11, the hinge between the first connecting rod 12 and the second connecting rod 13, and the hinge between the second connecting rod 13 and the slide rail 11, the round shaft 14 slides in the through groove 16, causing one side of the connecting plate 5 to be raised or lowered, thereby achieving the slope adjustment effect of the running board and meeting the running slope needs of different groups of people.

[0038] Specifically, symmetrical limit grooves 18 are provided on the inner wall of the slide 11, and a limit block 19 is fixedly provided on the side wall of the slider 7, which is located in the limit groove 18 and slidably connected to the limit groove 18. Through the limitation of the limit groove 18 and the limit block 19, the stability of the slider 7 sliding in the slide 11 is further improved. The outer wall of the first connecting rod 12 is in contact with the inner wall of the second connecting rod 13, and the outer wall of the second connecting rod 13 is in contact with the inner wall of the fixed frame 15. Limiting discs 17 that are in contact with the outer wall of the fixed frame 15 are fixed at both ends of the round shaft 14 to improve the stability of angle adjustment.

[0039] Specifically, the adjustment mechanism includes a locking block 28, a locking block spring 27, a push block 29, a push rod 30, and a push plate 31. A rotating column groove 23 is symmetrically formed on the inner wall of one rotating groove 21. A rotating column 24, rotatably connected to the rotating column groove 23, is fixedly provided on the side wall of the rotating arm 22. A rotating column groove 23 and a locking groove 25 are coaxially formed on the inner wall of the other rotating groove 21. A rotating column 24, rotatably connected to the rotating column groove 23, is fixedly provided on one side wall of the rotating arm 22. A locking block groove 26 is coaxially formed on the side of the rotating arm 22 near the locking groove 25. A locking block spring 27 is fixedly located at the bottom of the locking block groove 26. The locking block 28 is located within the locking block groove 26 and fixedly connected to the locking block spring 27. The push block 29 slides. Located within the lock groove 25, the push rod 30 is fixedly connected to the end of the push block 29 away from the lock block 28 and passes through the side wall of the rotating seat 20. The end of the push rod 30 located outside the rotating seat 20 is fixedly connected to the push plate 31. When it is necessary to adjust the angle of the rotating arm 22, press the push plate 31 so that the push rod 30 pushes the push block 29, and the push block 29 pushes the lock block 28 so that the lock block 28 slides out of the lock groove 25 and into the lock block groove 26. The rotating arm 22 loses its limit and can rotate around the rotating column groove 23. After the angle is adjusted, release the push plate 31. Under the elastic force of the lock block spring 27, the lock block 28 is locked into the lock groove 25 to limit the rotating arm 22, thus completing the angle adjustment of the rotating arm 22.

[0040] Specifically, the locking block 28 is a gear block. The cross-sectional shape of the locking block groove 26 and the locking groove 25 is consistent with the cross-sectional shape of the locking block 28. The locking block 28 fits into the inner wall of the locking block groove 26 and the locking groove 25. After the locking block 28 is pushed out of the locking groove 25 and into the locking block groove 26 by the push block 29, the locking block 28 rotates with the rotating arm 22. Due to the limiting of the rotating column 24 and the rotating column groove 23, the locking block 28 is kept coaxial with the locking groove 25 when rotating with the rotating arm 22. That is, the locking block 28 can overlap with the locking groove 25 again after rotating through the angle of one tooth. Thus, after the rotating arm 22 rotates, the locking block 28 can still be locked into the locking groove 25 to limit the rotating arm 22.

[0041] Specifically, a return spring 32 fixedly connected to the push plate 31 is fixedly provided on the outer wall of the rotating seat 20. The return spring 32 is sleeved on the push rod 30. Under the elastic force of the return spring 32, the push block 29 can be quickly reset without interfering with the locking block 28 being inserted into the locking groove 25. A retaining ring 33 is fixedly provided at one end of the push plate 31 near the rotating seat 20 and outside the return spring 32. When the push plate 31 pushes the push block 29 to push the locking block 28, the retaining ring 33 abuts against the outer wall of the rotating seat 20. At this time, the locking block 28 just slides out of the locking groove 25 and into the locking block groove 26, and the rotating arm 22 loses its limit and can rotate.

[0042] Specifically, the top of the rotating arm 22 is provided with a sliding groove 36. One end of the bracket 34 is fixedly provided with a sliding column 35 that is inserted into and slidably connected to the sliding groove 36. The end of the bracket 34 away from the sliding column 35 is rotatably connected to a screw 37 that is rotatably connected to the sliding groove 36 via a bearing. An adjusting column 38 is rotatably provided on the rotating arm 22 where the screw 37 is located. A rotating ring groove 40 is provided on the rotating arm 22 outside the sliding groove 36. A limiting ring groove 42 is provided on the inner wall of the bottom of the rotating ring groove 40. A rotating ring 41 that is rotatably connected to the rotating ring groove 40 is fixed at the bottom of the adjusting column 38. A limiting ring 43 that is rotatably connected to the limiting ring groove 42 is fixed on the outer wall of the rotating ring 41. A threaded hole 39 that is coaxial with the sliding groove 36 and threadedly connected to the screw 37 is provided on the adjusting column 38. By rotating the adjusting column 38, the screw 37 moves up and down in the threaded hole 39 through the threaded connection with the screw 37. The sliding column 35 slides in the sliding groove 36, thereby adjusting the height of the bracket 34.

[0043] Specifically, the adjusting arm groove 44 is slidably connected to the adjusting arm 45. Multiple slots 47 are evenly distributed on the adjusting arm 45 along its length. Two adjusting arm grooves 44 on one side have opposing control grooves 48 on their inner walls, which are connected. A control block 49 is slidably disposed within the control groove 48. A return groove 56 is formed on the side wall of the control groove 48. A return spring 57 is fixedly disposed near the inner wall of the adjusting arm groove 44. The return spring 57 is fixedly connected to a return block 58 that is slidably connected to the return groove 56 and fixedly connected to the side wall of the control block 49. A pressure block groove 52 is formed on the inner wall of the control groove 48. A pressure block 53 is provided in the pressure block groove 52 to allow the control block 49 to slide. A locking block 50 for engaging the control block 49 is fixedly disposed at the end of the control block 49 located outside the control groove 48. The adjusting arm groove 44 is located away from the control groove 48. One end of the control arm 45 has a clearance groove 51 for the locking block 50 to slide into. The control arm 45 has a connecting groove 59 that connects the various locking grooves 47 and is slidably connected to the control block 49. The pressing block 53 presses down on the inclined surface of the control block 49. The control block 49 slides under the force and drives the return block 58 to compress the return spring 57. The control block 49 slides to push the locking block 50 out of the locking groove 47 and into the clearance groove 51. At this time, the control block 49 is located in the locking groove 47 and does not interfere with the movement of the control arm 45. The control arm 45 can slide in the control arm groove 44 without the limitation of the locking block 50, thereby adjusting the position of the armrest 46. After the adjustment is completed, the force on the pressing block 53 is released. Under the elastic force of the return spring 57, the control block 49 slides out of the locking groove 47 and into the control groove 48, and drives the locking block 50 to slide into the corresponding locking groove 47, thus limiting and fixing the control arm 45.

[0044] Specifically, the two control blocks 49 abut against each other at their closest ends. This closest end of the control blocks 49 is an inclined surface that abuts against the pressure block 53. A pressure column 54 is fixedly connected to the end of the pressure block 53 furthest from the control block 49, penetrating the outer wall of the bracket 34. A pressure plate 55 is fixedly connected to the end of the pressure column 54 located outside the bracket 34. Pressing the pressure plate 55 moves the pressure column 54, which in turn moves the pressure block 53, thus controlling the movement of the control block 49. The locking block 50 has a rectangular cross-section and fits tightly into the locking slot 47. The control block 49 has a square cross-section and its length is the same as the width of the locking block 50. The side length of the control block 49 is the same as the width of the connecting groove 59. When the control block 49 is in the locking groove 47, the adjusting arm 45 is in the unlocked state. Pulling the adjusting arm 45 moves it in the adjusting arm groove 44. The control block 49 slides in the connecting groove 59 without interfering with the sliding of the adjusting arm 45. When the locking block 50 is in the locking groove 47, the adjusting arm 45 is completely limited, and the long side of the locking block 50 cannot slide in the connecting groove 59, thereby fixing the adjusting arm 45.

[0045] A specific application example of this embodiment is as follows:

[0046] When this device is in use, the treadmill body 1 can automatically adjust its speed while running on it (this is prior art as described in the prior art document). The cushioning spring 2 can buffer the impact on the running board, and the damping piston 3 can slowly release the energy compressed by the cushioning spring 2, thereby preventing the running board from rebounding rapidly and ensuring the safety of the runner. It can reduce the impact on the runner's knees. The cushioning pad 4 can prevent the rigid impact generated when the damping piston 3 is fully compressed, so that the running board always maintains flexible cushioning, thereby protecting the runner. When the runner needs a certain incline, the motor 9 can be started. The motor 9 drives the lead screw 8 to rotate, thereby causing the slider 7 to slide within the slide rail 11. The hinges between rod 12 and slide rail 11, the hinges between the first connecting rod and the second connecting rod 13, and the hinges between the second connecting rod 13 and slide rail 11, allow the round shaft 14 to slide within the through groove 16, raising or lowering one side of the connecting plate 5, thus achieving the slope adjustment effect of the running board and meeting the running slope needs of different groups of people. When the position of the handrail 46 needs to be adjusted, press the push plate 31 to push the push rod 30 to push the push block 29, and the push block 29 to push the locking block 28, causing the locking block 28 to slide out of the locking groove 25 and into the locking block groove 26. The rotating arm 22 loses its limit and can rotate around the rotating column groove 23. After the angle is adjusted, release the push plate 31, and under the elastic force of the locking block spring 27, the locking block 28 will be locked back into the locking groove 25. The rotating arm 22 is limited, completing the angle adjustment of the rotating arm 22. The rotating arm 22 can be adjusted to fit snugly against the treadmill body 1 for easy storage. Rotating the adjusting column 38, the screw 37 is connected to the threaded hole 39 through the threaded connection with the screw 37, allowing the screw 37 to move up and down within the threaded hole 39, thereby adjusting the height of the support 34. Pressing the pressure plate 55 moves the pressure column 54, which in turn moves the pressure block 53. The pressure block 53 presses down on the inclined surface of the control block 49, causing the control block 49 to slide under force and drive the return block 58 to compress the return spring 57. The control block 49 slides, pushing the locking block 50 out of the locking groove 47 and into the relief groove 51. At this time, the control block 49 is located in the locking groove 47 and does not interfere with the adjustment. As the arm 45 moves, it loses the limiting position of the locking block 50 and can slide within the adjusting arm groove 44. The control block 49 slides within the connecting groove 59, thereby adjusting the position of the handrail 46. After adjustment, the pressure plate 55 is released, and under the elastic force of the return spring 57, the control block 49 slides out of the locking groove 47 and into the control groove 48, driving the locking block 50 to slide into the corresponding locking groove 47, thus limiting and fixing the adjusting arm 45. By adjusting the angle of the rotating arm 22, the height of the bracket 34, and the position of the adjusting arm 45 within the adjusting arm groove 44, the handrail 46 can be adjusted in multiple directions, so that the handrail 46 meets the user's position requirements and ensures running safety.

[0047] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrically powered treadmill with automatic speed adjustment, comprising a treadmill body (1), characterized in that: It also includes a buffer mechanism. The bottom of the treadmill body (1) is connected to a connecting plate (5) through the buffer mechanism. The bottom of the connecting plate (5) is provided with a base plate (6). One side of the base plate (6) is hinged to the bottom of the connecting plate (5). A slide rail (11) is fixedly provided at the middle position of the end of the base plate (6) away from the hinged end of the connecting plate (5). A slider (7) is slidably provided in the slide rail (11). A driving mechanism for driving the slider (7) to slide is provided on the base plate (6). The two side walls of the slider (7) are respectively hinged with a first connecting rod (12). The outer wall of the slide rail (11) is respectively hinged with a second connecting rod (13). The end of the first connecting rod (12) away from the slider (7) is hinged to the second connecting rod (13). The ends of the two second connecting rods (13) away from the slide rail (11) are rotatably connected to a... A circular shaft (14) is provided with a fixed frame (15) at the bottom of the connecting plate (5). A through groove (16) for sliding of the circular shaft (14) is provided through the side wall of the fixed frame (15). A rotating seat (20) is symmetrically fixed on the side wall of the treadmill body (1). A rotating groove (21) is provided in the rotating seat (20). A rotating arm (22) is rotatably connected in the rotating groove (21). An adjustment mechanism for controlling the rotation angle of the rotating arm (22) is provided in one side of the rotating groove (21). A telescopic bracket (34) is provided on the rotating arm (22). An adjustment arm groove (44) is symmetrically provided on both sides of the bracket (34). An adjustment arm (45) with an adjustable position is provided in the adjustment arm groove (44). A handrail (46) is fixedly connected to the two adjustment arms (45) on one side. The buffer mechanism includes a buffer spring (2), a damping piston (3), and a buffer pad (4). The buffer spring (2) is fixedly connected to the bottom of the treadmill body (1) and the connecting plate (5) on both sides and is evenly distributed in multiple units. The damping piston (3) is fixedly connected to the bottom of the treadmill body (1) and the connecting plate (5) on both ends. The buffer spring (2) is sleeved on the damping piston (3). The buffer pad (4) is located between the buffer springs (2) and is fixedly connected to the connecting plate (5). The adjusting mechanism includes a locking block (28), a locking block spring (27), a push block (29), a push rod (30), and a push plate (31). A rotating column groove (23) is symmetrically opened on the inner wall of one side of the rotating groove (21). A rotating column (24) rotatably connected to the rotating column groove (23) is fixedly provided on the side wall of the rotating arm (22). A rotating column groove (23) and a locking groove (25) are coaxially opened on the inner wall of the rotating groove (21) on the other side. A rotating column (24) rotatably connected to the rotating column groove (23) is fixedly provided on one side wall of the rotating arm (22). The rotating arm (29)... 2) A locking block groove (26) is coaxially provided on one side near the locking groove (25). The locking block spring (27) is fixedly provided at the bottom of the locking block groove (26). The locking block (28) is located in the locking block groove (26) and is fixedly connected to the locking block spring (27). The push block (29) is slidably provided in the locking groove (25). The push rod (30) is fixedly connected to the end of the push block (29) away from the locking block (28) and passes through the side wall of the rotating seat (20). The end of the push rod (30) located outside the rotating seat (20) is fixedly connected to the push plate (31). The top of the rotating arm (22) is provided with a sliding groove (36). One end of the bracket (34) is fixedly provided with a sliding column (35) that is inserted into the sliding groove (36) and slidably connected to the sliding groove (36). The end of the bracket (34) away from the sliding column (35) is rotatably connected to a screw (37) that is rotatably connected to the sliding groove (36) through a bearing. An adjusting column (38) is rotatably provided on the rotating arm (22) where the screw (37) is located. A rotating ring groove (40) is provided on the rotating arm (22) outside the sliding groove (36). A limiting ring groove (42) is provided on the inner wall of the bottom of the rotating ring groove (40). A rotating ring (41) that is rotatably connected to the rotating ring groove (40) is fixedly provided at the bottom of the adjusting column (38). A limiting ring (43) that is rotatably connected to the limiting ring groove (42) is fixed on the outer wall of the rotating ring (41). A threaded hole (39) that is coaxial with the sliding groove (36) and threadedly connected to the screw (37) is provided on the adjusting column (38). The adjusting arm groove (44) is slidably connected to the adjusting arm (45). Multiple slots (47) are evenly distributed on the adjusting arm (45) along its length. Control grooves (48) are formed on the inner walls of two adjusting arm grooves (44) on one side and are connected. A control block (49) is slidably disposed within the control groove (48). A return groove (56) is formed on the side wall of the control groove (48). A return spring (57) is fixedly disposed near the inner wall of the adjusting arm groove (44) in the return groove (56). The return spring (57) is fixedly connected to a component that is slidably connected to the return groove (56). The return block (58) is fixedly connected to the side wall of the control block (49). The inner wall of the control groove (48) is provided with a pressure block groove (52). The pressure block groove (52) is provided with a pressure block (53) for sliding the control block (49). One end of the control block (49) located outside the control groove (48) is fixedly provided with a locking block (50) for locking into the locking slot (47). The end of the adjusting arm groove (44) away from the control groove (48) is provided with a clearance groove (51) for the locking block (50) to slide into. The adjusting arm (45) is provided with a connecting groove (59) that connects each locking slot (47) and is slidably connected to the control block (49).

2. The electric treadmill with automatic speed adjustment according to claim 1, characterized in that: The driving mechanism includes a motor (9), a fixed seat (10) and a lead screw (8). The motor (9) is fixedly mounted on the base plate (6) and its output end is fixedly connected to the lead screw (8). The fixed seat (10) is fixedly mounted on the base plate (6) and rotatably connected to the lead screw (8). The slider (7) has a threaded groove for the lead screw (8) to pass through and is threadedly connected to the lead screw (8).

3. The electric treadmill with automatic speed adjustment according to claim 1, characterized in that: The inner wall of the slide (11) is symmetrically provided with limiting grooves (18). The side wall of the slider (7) is fixedly provided with a limiting block (19) located in the limiting groove (18) and slidably connected to the limiting groove (18). The outer wall of the first connecting rod (12) is in contact with the inner wall of the second connecting rod (13). The outer wall of the second connecting rod (13) is in contact with the inner wall of the fixed frame (15). The two ends of the round shaft (14) are fixedly provided with limiting plates (17) that are in contact with the outer wall of the fixed frame (15).

4. The electric treadmill with automatic speed adjustment according to claim 1, characterized in that: The lock block (28) is a gear block. The cross-sectional shape of the lock block groove (26) and the lock groove (25) is consistent with the cross-sectional shape of the lock block (28). The lock block (28) fits into the inner wall of the lock block groove (26) and the lock groove (25).

5. The electric treadmill with automatic speed adjustment according to claim 1, characterized in that: The outer wall of the rotating seat (20) is fixedly provided with a return spring (32) that is fixedly connected to the push plate (31). The return spring (32) is sleeved on the push rod (30). The push plate (31) is fixedly provided with a retaining ring (33) at one end near the rotating seat (20) and outside the return spring (32).

6. The electric treadmill with automatic speed adjustment according to claim 1, characterized in that: The two control blocks (49) are close to each other at one end. The two control blocks (49) are close to each other at one end, which is an inclined surface and abuts against the pressure block (53). The pressure block (53) is fixedly connected to a pressure column (54) at one end away from the control block (49) and penetrates the outer wall of the bracket (34). The pressure column (54) is fixedly connected to a pressure plate (55) at one end outside the bracket (34). The card block (50) has a rectangular cross section and fits tightly with the card slot (47). The control block (49) has a square cross section and its length is the same as the width of the card block (50). The side length of the control block (49) is the same as the width of the connecting groove (59).

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