Treadmill and hybrid adjustable shock absorption device therefor

Abstract

The application relates to the technical field of treadmills, and particularly discloses a treadmill and a mixed adjustable damping device thereof, which comprises a longitudinal damping mechanism arranged between a main frame and a running plate of the treadmill and generating a longitudinal buffering effect; and a transverse damping mechanism comprising a connecting rod lifting assembly, a transmission rod and a transverse buffering assembly, wherein the connecting rod lifting assembly is arranged between the main frame and the running plate, the transverse buffering assembly is arranged on the main frame, the transverse buffering assembly is connected with the sliding feet of the connecting rod lifting assembly through the transmission rod, an impact force on the running plate is transmitted to the transverse buffering assembly through the connecting rod lifting assembly and the transmission rod, and the transverse buffering assembly generates a transverse buffering effect, and the damping strength of the transverse buffering assembly is adjustable. The transverse damping mechanism of the application can generate adjustable transverse damping strength in the transverse direction, can realize multiple damping effects in the transverse and longitudinal directions, can reduce the negative effect on the knees, and can adjust different damping strengths according to different users and running scenes, and improve the comfort.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of treadmills, in particular to a treadmill and a hybrid adjustable damping device thereof. BACKGROUND

[0002] Since running on a treadmill is a passive exercise, i.e. the runner's foot is moved by the running belt under the condition of a set speed and angle, the impact force on the runner's joints such as the feet, knees and hips is 3-5 times the body weight. Therefore, the primary problem of protecting the safety of exercise is how to effectively buffer the impact on the above-mentioned human joint parts.

[0003] The existing treadmills generally use damping blocks between the running board and the chassis frame to achieve damping, and use the elasticity of the damping blocks to improve the damping performance of the treadmill. With the continuous development of technology, some different damping methods have also gradually appeared. For example, Chinese patent document (CN203663348U) discloses a treadmill with multiple damping, a plurality of damping columns are installed between the running belt and the frame, and a plurality of double damping devices composed of a spiral damper and a spring damper are coaxially combined between the foot platform and the frame. The treadmill with multiple damping functions to achieve multiple damping functions, good damping effect, more balanced stress, and improved safety performance and comfort. For example, Chinese patent No. CN111840899A discloses a new type of treadmill air bag damping structure, which discloses a treadmill with an air bag, specifically a gas charging and discharging matching device for the air bag. The internal pressure of the air bag is detected and displayed, and then the user can control the pump and the air release valve by pressing the key switch to charge and discharge the air bag, thereby controlling the hardness of the running board.

[0004] However, whether it is a rubber damping block, a spiral spring double damper, or a damping air bag, it is in the upward and downward vertical direction that absorbs the impact by deformation, and once the impact force is weakened or eliminated, it will use its rebound force to feedback to the knee, causing secondary damage to the knee joint. Even if lateral damping is used, it is difficult to adjust the buffer damping strength of the running board according to different weights of runners or different running scenarios such as mountain, road or rehabilitation mode. SUMMARY

[0005] The present application aims to provide a treadmill and a hybrid adjustable damping device thereof, which can reduce the damage to the knee joint and adjust the damping strength according to different weights and different scenarios.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0007] The treadmill hybrid adjustable damping device comprises:

[0008] A longitudinal damping mechanism is arranged between the main frame and the running board of the treadmill and generates damping effect in the longitudinal direction.

[0009] A transverse damping mechanism includes a linkage lifting assembly, a transmission rod and a transverse damping assembly. The linkage lifting assembly is arranged between the main frame and the running board of the treadmill. The transverse damping assembly is arranged on the main frame. The transverse damping assembly is connected to the sliding feet of the bottom of the linkage lifting assembly through the transmission rod. The impact force on the running board is transmitted to the transverse damping assembly through the linkage lifting assembly and the transmission rod and generates damping effect in the transverse direction by the transverse damping assembly. The damping strength of the transverse damping assembly is adjustable.

[0010] Preferably, the longitudinal damping mechanism is a damping air bag or a rubber pad.

[0011] Preferably, the damping strength of the longitudinal damping mechanism in the longitudinal direction is adjustable.

[0012] Preferably, the linkage lifting assembly is a cross linkage lifting assembly. The cross linkage lifting assembly includes a first upper rod, a second upper rod, a first lower rod, a second lower rod, a middle rod and two X-shaped linkage rods. The intersection of the two X-shaped linkage rods is movably connected by the middle rod. The first side top of the two X-shaped linkage rods is movably connected by the first upper rod. The first side bottom of the two X-shaped linkage rods is movably connected by the first lower rod. The second side top of the two X-shaped linkage rods is movably connected by the second upper rod. The second side bottom of the two X-shaped linkage rods is movably connected by the second lower rod.

[0013] The two ends of the first upper rod and the two ends of the second upper rod are connected to the bottom of the running board. The two ends of the first lower rod are fixedly connected to the main frame as the fixed feet of the cross linkage lifting assembly. The two ends of the second lower rod are horizontally slidably arranged on the main frame as the sliding feet of the cross linkage lifting assembly. The transmission rod is connected to the center of the second lower rod.

[0014] Preferably, the cross linkage lifting assembly further includes a connecting plate. The two ends of the first upper rod and the two ends of the second upper rod are respectively fixedly installed with a connecting plate. The top surface of each connecting plate is on the same horizontal plane and is fixedly connected to the bottom plate of the running board.

[0015] Preferably, the transverse damping assembly adopts a spring damper. The spring damper deforms in the transverse direction and the spring stiffness is adjustable.

[0016] Preferably, the transverse buffering assembly comprises a buffering seat body, a first buffering plate, a second buffering plate, a buffering spring, the buffering seat body is mounted on the main frame and has a mounting space and a guide column in it, the first buffering plate and the second buffering plate are both located in the mounting space and are slidingly fitted on the guide column, the first buffering plate is connected with the conducting rod, the second buffering plate is threadedly connected with the adjusting screw and the adjusting screw is axially fixed on the buffering seat body, and the buffering spring is clamped between the first buffering plate and the second buffering plate and is horizontally arranged.

[0017] Preferably, the guide column is provided with a limiting stop ring at a position corresponding to the first buffering plate and the second buffering plate.

[0018] Preferably, the first buffering plate and the second buffering plate are made of silica gel.

[0019] The application further provides a treadmill comprising the above-mentioned hybrid adjustable damping device.

[0020] Compared with the prior art, the application has the following beneficial effects:

[0021] The damping device of the treadmill comprises a longitudinal damping mechanism and a transverse damping mechanism, the transverse damping mechanism generates adjustable transverse damping strength in the transverse direction, multiple damping effects in the transverse and longitudinal directions are realized, the negative effect on the knee is reduced, different damping strengths can be adjusted according to different users and running scenes, and the running comfort is improved. According to needs, the longitudinal damping strength of the longitudinal damping mechanism can also be set as adjustable, and the general damping range of the product is improved.

[0022] The transverse damping mechanism comprises a cross-link lifting assembly, a conducting rod and a transverse buffering assembly, the cross-link lifting assembly is mounted at the bottom of the running plate and can descend in response to external force applied on the running plate, such as running action, the bottom sliding foot is horizontally moved while the cross-link assembly descends, then the force is conducted to the transverse buffering assembly through the conducting rod connected with the sliding foot, the buffering spring is compressed in the transverse direction after being extruded by the first buffering plate and the conducting rod, part of the impact energy is absorbed, the impact force on the knee joint is dispersed, and the damage to the knee joint is greatly reduced. When the first buffering plate and the second buffering plate are made of elastic material, the good compression deformation and elastic force of the elastic material also provide certain damping effect, and the double damping structure composed of the buffering spring and the elastic material can effectively absorb the movement impact force generated during running. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Fig. 1 is a schematic view of the main frame, the running plate and the damping device of the treadmill in the mounting state.

[0024] Figure 2This is a schematic diagram of the installation structure of the shock absorption device of the present invention on the main frame of a treadmill.

[0025] Figure 3 for Figure 2 A partial structural diagram.

[0026] Figure 4 This is a partial front view of the shock absorption device of the present invention on the main frame of a treadmill.

[0027] Figure 5 This is a cross-sectional view of the transverse buffer assembly of the present invention on the main frame.

[0028] Figure 6 This is a perspective view of the transverse buffer assembly of the present invention on the main frame.

[0029] Figure 7 This is an exploded view of the lateral buffer component of the present invention.

[0030] Figure 8 This is a schematic diagram of the transverse damping mechanism of the present invention.

[0031] Markings in the diagram: 100, running board; 200, main frame; 201, left tube; 202, right tube; 203, middle tube; 204, horizontal slide rail; 10, cross linkage lifting assembly; 11, X-shaped linkage; 12, first upper rod; 13, first lower rod; 14, second upper rod; 15, second lower rod; 16, middle rod; 17, connecting plate; 20, transmission rod; 30, transverse buffer assembly; 31, first buffer plate; 32, second buffer plate; 33, buffer spring; 34, buffer seat; 35, guide column; 36, adjusting screw; 37, limit stop ring; 40, rubber pad. Detailed Implementation

[0032] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0033] like Figures 1-8 As shown, this embodiment provides a treadmill, including a main frame 200, a running board 100, and a running belt. The running belt is mounted on the main frame 200 for forward and backward transmission. The running board 100 is located inside the running belt and above the main frame 200. A hybrid adjustable shock absorption device is provided between the running board 100 and the main frame 200. The hybrid adjustable device achieves multiple shock absorption effects in the lateral and longitudinal directions, reducing the negative impact on the knees. It can also adjust different shock absorption intensities according to different users and running scenarios, thereby improving running comfort.

[0034] In the embodiment, the main frame 200 comprises a left tube 201, a right tube 202 and two middle tubes 203 vertically connecting the left tube 201 and the right tube 202, the left tube 201 and the right tube 202 are opposite to each other, and the right sides of the two middle tubes 203 are respectively provided with horizontal sliding grooves 204.

[0035] In the embodiment, the mixed adjustable damping device comprises a longitudinal damping mechanism and a transverse damping mechanism, the longitudinal damping mechanism is arranged between the main frame 200 and the running board 100 and generates a longitudinal buffering effect, and a damping air bag or a rubber pad 40 commonly used in the prior art can be used, when the damping air bag is used, the air pressure of the damping air bag can be adjusted according to requirements to realize adjustment of the longitudinal damping strength.

[0036] The transverse damping mechanism of the embodiment comprises a cross-link lifting assembly 10, a transmission rod 20 and a transverse buffering assembly 30, the cross-link lifting assembly 10 is arranged between the main frame 200 of the treadmill and the running board 100, the transverse buffering assembly 30 is arranged on the main frame 200, the transverse buffering assembly 30 and the sliding feet at the bottom of the cross-link lifting assembly 10 are connected through the transmission rod 20, the impact force on the running board 100 is transmitted to the transverse buffering assembly 30 through the cross-link lifting assembly 10 and the transmission rod 20 and generates a transverse buffering effect by using the transverse buffering assembly 30, and the damping strength of the transverse buffering assembly 30 is adjustable.

[0037] Specifically, the cross-link lifting assembly 10 comprises a connecting plate 17, a first upper rod 12, a second upper rod 14, a first lower rod 13, a second lower rod 15, a middle rod 16 and two X-shaped connecting rods 11, the cross positions of the two X-shaped connecting rods 11 are movably connected through the middle rod 16, the first side top portions of the two X-shaped connecting rods 11 are movably connected through the first upper rod 12, the first side bottom portions of the two X-shaped connecting rods 11 are movably connected through the first lower rod 13, the second side top portions of the two X-shaped connecting rods 11 are movably connected through the second upper rod 14, and the second side bottom portions of the two X-shaped connecting rods 11 are movably connected through the second lower rod 15.

[0038] The two ends of the first upper rod 12 and the two ends of the second upper rod 14 are fixedly installed with connecting plates 17, the top surfaces of each connecting plate 17 are on the same horizontal plane and are fixedly connected with the bottom plate of the running board 100. The two ends of the first upper rod 12 and the two ends of the second upper rod 14 are connected with the bottom of the running board 100, the two ends of the first lower rod 13 are fixedly connected on the two middle pipes 203 of the main frame 200 as the fixed feet of the cross-link lifting assembly 10, the two ends of the second lower rod 15 are horizontally slidably arranged in the horizontal sliding grooves 204 on the two middle pipes 203 of the main frame 200 as the sliding feet of the cross-link lifting assembly 10, the impact force generated when stepping on the running board 100 during running will press down the top of the cross-link lifting assembly 10, the two X-shaped connecting rods 11 are synchronously linked, the supporting rods of the X-shaped connecting rods 11 will rotate around the corresponding first upper rod 12, first lower rod 13, second upper rod 14 and second lower rod 15, the fixed feet keep the relative position with the main frame 200 but the sliding feet horizontally move along the horizontal sliding grooves 204.

[0039] Specifically, the lateral buffer assembly 30 adopts a spring shock absorber which deforms in the lateral direction and the spring stiffness is adjustable. The lateral buffer assembly 30 comprises a buffer seat body 34, a first buffer plate 31, a second buffer plate 32 and a buffer spring 33, the buffer seat body 34 is fixedly installed on the right pipe 202 of the main frame 200 through bolts at four corners and has an installation space and a guide column 35 in the buffer seat body 34, the right pipe 202 is provided with an installation opening on the outer side wall corresponding to the installation space, the buffer seat body 34 seals the installation opening, and the first buffer plate 31, the second buffer plate 32 and the buffer spring 33 are installed through the installation opening.

[0040] The first buffer plate 31 and the second buffer plate 32 are located in the installation space and are slidably fitted on the guide column 35, the guide column 35 plays a guiding role on the first buffer plate 31 and the second buffer plate 32, and the guide column 35 is parallel to the action direction of the buffer spring 33. The second buffer plate 32 is threadedly connected with an adjusting screw 36 which is axially fixed on the buffer seat body 34, the buffer spring 33 is clamped between the first buffer plate 31 and the second buffer plate 32 and is horizontally arranged, one end of the conducting rod 20 is connected with the center of the second lower rod 15 and the other end of the conducting rod 20 is connected with the first buffer plate 31 through a screw, and the conducting rod 20 is parallel to the moving direction of the sliding feet.

[0041] The head of the adjusting screw 36 is connected with a knob, the surface of the buffer seat body 34 is provided with a scale disc, the knob can drive the adjusting screw 36 to only rotate on the buffer seat body 34 without displacement, and the second buffer plate 32 is driven to displace laterally along the guide column 35 by thread cooperation, different positions of the second buffer plate 32 on the adjusting screw 36 will cause different spring stiffnesses of the buffer spring 33, so as to realize different shock absorption intensities.

[0042] When no external force is applied to the running board 100, the cross-link lifting assembly 10 is lifted back to the initial height, the transmission rod 20 is also returned to the initial position without force, and the first buffer plate 31 is tightly attached to the side wall of the right tube 202 under the action of the buffer spring 33. When the sliding foot of the cross-link lifting assembly 10 is horizontally moved along the horizontal sliding groove 204 due to external force, the force is transmitted to the first buffer plate 31 through the transmission rod 20, and then the buffer spring 33 is compressed, and the lateral deformation of the buffer spring 33 is used to achieve the effect of lateral buffering and shock absorption.

[0043] In addition, the guide column 35 has a limiting stop ring 37 corresponding to the position between the first buffer plate 31 and the second buffer plate 32. On the one hand, the limiting stop ring 37 can limit the maximum lateral displacement of the first buffer plate 31 with the transmission rod 20, prevent the buffer spring 33 from being deformed too much and causing failure, and protect the buffer spring 33. On the other hand, the limiting stop ring 37 can also limit the extreme position of the position adjustment of the second buffer plate 32. At the same time, the connecting plate 17 of the embodiment is above the middle tube 203, and the connecting plate 17 is L-shaped. When the first buffer plate 31 makes the maximum lateral displacement to reach the limiting stop ring 37, the connecting plate 17 abuts against the middle tube 203, so as to protect the buffer spring 33 and the first buffer plate 31 in cooperation with the connecting plate 17 and the limiting stop ring 37.

[0044] As a preferred embodiment, the tail of the adjusting screw 36 does not exceed the limiting stop ring 37. However, in some other examples, the transmission rod 20 passes through the side wall of the right tube 202 and is locked by square pieces at four corners, and the square pieces, the transmission rod 20 and the first buffer plate 31 are respectively provided with avoiding holes corresponding to the position of the adjusting screw 36. When the transmission rod 20 is horizontally moved to the right, the tail of the adjusting screw 36 will enter the avoiding hole of the transmission rod 20, and the diameter of the avoiding hole is greater than the diameter of the tail of the adjusting screw 36.

[0045] The first buffer plate 31 and the second buffer plate 32 of the embodiment are made of silica gel, which provides a certain buffering and shock absorption effect by using the good compression deformation and resilience of silica gel itself, and forms a double shock absorption structure with the buffer spring 33, which can effectively absorb the impact force generated during running.

[0046] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A treadmill with a hybrid adjustable shock absorption device, characterized in that, include: The longitudinal shock absorption mechanism is installed between the main frame of the treadmill and the running board to provide longitudinal cushioning. The lateral shock absorption mechanism includes a linkage lifting assembly, a transmission rod, and a lateral buffer assembly. The linkage lifting assembly is located between the treadmill main frame and the running board. The lateral buffer assembly is located on the main frame. The lateral buffer assembly is connected to the sliding foot at the bottom of the linkage lifting assembly via the transmission rod. The impact force on the running board is transmitted to the lateral buffer assembly through the linkage lifting assembly and the transmission rod, and the lateral buffer assembly generates a lateral buffering effect. The shock absorption intensity of the lateral buffer assembly is adjustable. The linkage lifting assembly is a cross linkage lifting assembly, which includes a first upper rod, a second upper rod, a first lower rod, a second lower rod, a middle rod, and two X-shaped connecting rods. The intersection of the two X-shaped connecting rods is movably connected through the middle rod. The top of the first side of the two X-shaped connecting rods is movably connected through the first upper rod. The bottom of the first side of the two X-shaped connecting rods is movably connected through the first lower rod. The top of the second side of the two X-shaped connecting rods is movably connected through the second upper rod. The bottom of the second side of the two X-shaped connecting rods is movably connected through the second lower rod. Both ends of the first upper rod and both ends of the second upper rod are connected to the bottom of the running board. Both ends of the first lower rod are fixedly connected to the main frame and serve as fixed feet of the cross linkage lifting assembly. Both ends of the second lower rod are horizontally slidably mounted on the main frame and serve as sliding feet of the cross linkage lifting assembly. The transmission rod is connected to the center of the second lower rod.

2. The treadmill hybrid adjustable shock absorption device according to claim 1, characterized in that: The longitudinal damping mechanism is a damping airbag or a rubber pad.

3. The treadmill hybrid adjustable shock absorption device according to claim 1, characterized in that: The longitudinal damping mechanism has adjustable damping strength in the longitudinal direction.

4. The treadmill hybrid adjustable shock absorption device according to claim 1, characterized in that: The cross linkage lifting assembly also includes connecting plates. Connecting plates are fixedly installed at both ends of the first upper rod and both ends of the second upper rod, and the top surfaces of each connecting plate are on the same horizontal plane and fixedly connected to the running plate base plate.

5. The treadmill hybrid adjustable shock absorption device according to claim 1, characterized in that: The lateral buffer assembly employs a spring damper, which deforms laterally and has adjustable spring stiffness.

6. The treadmill hybrid adjustable shock absorption device according to claim 5, characterized in that: The transverse buffer assembly includes a buffer seat, a first buffer plate, a second buffer plate, and a buffer spring. The buffer seat is mounted on the main frame and has an installation space and a guide post. The first and second buffer plates are both located in the installation space and are slidably fitted onto the guide post. The first buffer plate is connected to a guide rod, and the second buffer plate is threadedly connected to an adjusting screw, which is axially fixed to the buffer seat. The buffer spring is sandwiched between the first and second buffer plates and is horizontally positioned.

7. The treadmill hybrid adjustable shock absorption device according to claim 6, characterized in that: The guide post has a limiting ring at the position between the first buffer plate and the second buffer plate.

8. The treadmill hybrid adjustable shock absorption device according to claim 6, characterized in that: The first and second buffer plates are made of silicone.

9. A treadmill, characterized in that: Includes the hybrid adjustable damping device as described in any one of claims 1 to 8.

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