Scissor fork type damping mechanism of running machine

Abstract

The utility model relates to the technical field of treadmills, in particular to a scissor type damping mechanism of a treadmill, which comprises a cross connecting rod lifting component and a buffer component. The bottom of the first side of the crossed connecting rod lifting assembly is a fixed foot, and the bottom of the second side of the crossed connecting rod lifting assembly is a sliding foot; the buffering assembly is connected to a sliding foot of the cross connecting rod lifting assembly through a conduction rod, the acting direction of the buffering assembly is parallel to the sliding direction of the sliding foot of the cross connecting rod lifting assembly, and the sliding direction of the sliding foot is horizontal. The cross connecting rod lifting assembly is installed at the bottom of the running board and can descend in response to external force applied to the running board, the bottom sliding feet are driven to horizontally move when the cross connecting rod assembly descends, then force is transmitted to the buffering assembly through the transmission rods connected with the sliding feet, the buffering effect in the transverse direction is achieved, and the running board is protected. The impact force on the knee joint can be dispersed, and the injury to the knee joint is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of treadmills, in particular to a scissor-type shock absorbing mechanism for a treadmill. Background Art

[0002] Since running on a treadmill is a passive exercise, that is, the running belt drives the fitness person's feet to move at a set speed and angle, the impact force on the fitness person's feet, knees, and hip joints when running is 3 to 5 times their body weight. Therefore, the primary issue in protecting sports safety is how to effectively cushion the impact on the above-mentioned joints.

[0003] The existing treadmill adopts a shock-absorbing method, which is generally achieved by using a shock-absorbing block between the treadmill running board and the chassis frame, and utilizing the elasticity of the shock-absorbing block to improve the shock-absorbing performance of the treadmill. With the continuous development of technology, some different shock-absorbing methods have gradually emerged.

[0004] For example: China's public patent document (CN203663348U) discloses a treadmill with multiple shock absorbers, in which multiple shock-absorbing columns are installed between the running belt and the frame, and multiple double shock-absorbing devices composed of a coaxial combination of spiral shock absorbers and spring shock absorbers are installed between the foot platform and the frame. The treadmill with multiple shock absorbers can realize multiple shock-absorbing functions, has good shock-absorbing effects, more balanced force, and improved safety performance and comfort.

[0005] For example, Chinese patent publication No. CN111840899A discloses a novel treadmill airbag shock-absorbing structure, which discloses a treadmill with an airbag, and specifically discloses an air-filling and deflation device for the airbag. The internal pressure of the airbag is detected and displayed, and then the user can control the pump and the deflation valve by pressing a button to inflate and deflate the airbag, thereby controlling the hardness of the running board.

[0006] However, whether it is rubber shock-absorbing blocks, coil spring dual shock absorbers, or shock-absorbing airbags, they all absorb impact through deformation in the up and down longitudinal directions. Once the impact force is weakened or eliminated, it will use its own rebound force to feed back to the knee, causing secondary damage to the knee joint. Utility Model Content

[0007] The utility model aims to provide a scissor-type shock-absorbing mechanism for a treadmill, which can effectively alleviate the impact caused by running.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A scissor-type shock-absorbing mechanism for a treadmill comprises a cross-link lifting assembly and a buffer assembly, wherein the tops of the cross-link lifting assembly are on the same horizontal plane, the bottom of a first side of the cross-link lifting assembly is a fixed foot, and the bottom of a second side of the cross-link lifting assembly opposite to the first side is a sliding foot; the buffer assembly is connected to the sliding foot of the cross-link lifting assembly through a conduction rod, and the action direction of the buffer assembly is parallel to the sliding direction of the sliding foot of the cross-link lifting assembly, and the sliding direction of the sliding foot is horizontal.

[0010] Preferably, the cross-link lifting assembly includes a first upper rod, a second upper rod, a first lower rod, a second lower rod, an intermediate rod and two X-shaped links, the cross positions of the two X-shaped links are movably connected via the intermediate rod, the first side tops of the two X-shaped links are movably connected via the first upper rod, the first side bottoms of the two X-shaped links are movably connected via the first lower rod, the second side tops of the two X-shaped links are movably connected via the second upper rod, and the second side bottoms of the two X-shaped links are movably connected via the second lower rod; the first lower rod is a fixed foot, the second lower rod is a sliding foot, and the conduction rod is connected to the center of the second lower rod.

[0011] Preferably, the cross-link lifting assembly further comprises a connecting plate, and connecting plates are fixedly mounted on both ends of the first upper rod and both ends of the second upper rod respectively, and the top surfaces of the connecting plates are on the same horizontal plane.

[0012] Preferably, the buffer assembly adopts a spring shock absorber.

[0013] Preferably, the buffer assembly includes a first buffer plate, a second buffer plate, and a buffer spring horizontally clamped between the first buffer plate and the second buffer plate, and the first buffer plate is connected to the conductive rod.

[0014] Preferably, the buffer assembly further comprises a buffer seat body, the buffer seat body is provided with a guide column, the guide column is movably arranged through the first buffer plate and the second buffer plate, and the first buffer plate and the second buffer plate are in the buffer seat body.

[0015] Preferably, a threaded through hole is formed on the second buffer plate, an adjusting screw is axially fixed at a position on the buffer seat corresponding to the threaded through hole, and the adjusting screw is threadably matched with the second buffer plate at the position of the threaded through hole.

[0016] Preferably, the head of the adjusting screw is connected with a knob, and the surface of the buffer seat has a dial.

[0017] Preferably, the guide column has a limit stop ring at a position corresponding to between the first buffer plate and the second buffer plate.

[0018] Preferably, the first buffer plate and the second buffer plate are made of elastic material.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The scissor-type shock absorbing mechanism of the utility model comprises a cross-link lifting assembly, a transmission rod and a buffer assembly. The cross-link lifting assembly is installed at the bottom of the running board and can respond to the external force applied to the running board, such as the running action, to descend. When the cross-link assembly descends, it drives the bottom sliding foot to move horizontally, and then transmits the force to the buffer assembly through the transmission rod connected to the sliding foot, thereby generating a lateral buffering effect, which can disperse the impact force on the knee joint and greatly reduce the damage to the knee joint.

[0021] Furthermore, the buffer assembly adopts a first buffer plate, a second buffer plate and a buffer spring horizontally clamped between the first buffer plate and the second buffer plate. The buffer spring will undergo lateral compression deformation after being squeezed by the first buffer plate and the conduction rod, thereby absorbing part of the impact energy. When the first buffer plate and the second buffer plate are made of elastic material, the elastic material's own good compression deformation and resilience also provide a certain buffering and shock-absorbing effect, forming a double shock-absorbing structure with the buffer spring, which can effectively absorb the sports impact force generated during running.

[0022] Furthermore, the second buffer plate cooperates with the adjusting screw thread, and the position of the second buffer plate on the adjusting screw can be adjusted by the adjusting screw, thereby changing the initial spacing between the first buffer plate and the second buffer plate, thereby causing the buffer spring to have different spring stiffnesses and achieve different shock absorption strengths, which is suitable for different runners and different running scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a schematic diagram of the application of the scissor-type shock absorbing mechanism on a treadmill.

[0024] Figure 2 The utility model is a schematic diagram of the installation structure of the scissor-type shock absorbing mechanism on the treadmill.

[0025] Figure 3 This is a schematic diagram of the structure of the scissor-type shock absorbing mechanism of the utility model.

[0026] Figure 4 This is a partial view of the scissor-type shock absorbing mechanism of the utility model on a treadmill.

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

[0028] Figure 6 This is an exploded view of the buffer component of the utility model.

[0029] Markings in the figure: 100, running board; 200, main frame; 201, left tube; 202, right tube; 203, middle tube; 204, horizontal slide; 10, cross-link lifting assembly; 11, X-shaped connecting rod; 12, first upper rod; 13, first lower rod; 14, second upper rod; 15, second lower rod; 16, middle rod; 17, connecting plate; 20, conduction rod; 30, 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. DETAILED DESCRIPTION

[0030] In order to make the above features and advantages of the present invention more obvious and understandable, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0031] like Figure 1-Figure 6 As shown, this embodiment provides a scissor-type shock absorbing mechanism for a treadmill, including a cross-link lifting assembly 10 and a buffer assembly 30, wherein the cross-link lifting assembly 10 is installed between the bottom of a running board 100 and a main frame 200, and the buffer assembly 30 is installed on one side of the main frame 200, and the cross-link lifting assembly 10 and the buffer assembly 30 are connected via a conduction rod 20.

[0032] In this embodiment, the main frame 200 includes 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 slide grooves 204. The main frame 200 is a frame used to install the running board 100 and the running belt in the treadmill.

[0033] In this embodiment, the cross-link lifting assembly 10 includes a connecting plate 17, a first upper rod 12, a second upper rod 14, a first lower rod 13, a second lower rod 15, an intermediate rod 16 and two X-shaped links 11. The cross positions of the two X-shaped links 11 are movably connected through the intermediate rod 16, the left tops of the two X-shaped links 11 are movably connected through the first upper rod 12, the left bottoms of the two X-shaped links 11 are movably connected through the first lower rod 13, the right tops of the two X-shaped links 11 are movably connected through the second upper rod 14, and the right bottoms of the two X-shaped links 11 are movably connected through the second lower rod 15. The two ends of the second lower rod 15 are slidably arranged in the horizontal slide groove 204 of the intermediate tube 203 to serve as sliding feet of the cross-link lifting assembly 10, and the two ends of the first lower rod 13 are fixedly connected to the intermediate tube 203 to serve as fixed feet of the cross-link lifting assembly 10.

[0034] The two ends of the first upper rod 12 and the two ends of the second upper rod 14 are respectively fixedly installed with connecting plates 17, and the top surfaces of each connecting plate 17 are on the same horizontal plane, that is, the tops of the cross-link lifting assembly 10 are on the same horizontal plane, and the connecting plate 17 is L-shaped, and a spacing is left between the bottom of the connecting plate 17 and the middle tube 203 of the main frame 200, and the connecting plate 17 is above the middle tube 203, and is fixedly installed on the bottom of the running board 100 through the connecting plate 17. When the user steps on the running board 100, the connecting plate 17 will be pressed down and the force will be transmitted to the two X-shaped connecting rods 11 and the second lower rod 15. The support rods of the X-shaped connecting rod 11 will rotate around the corresponding first upper rod 12, the first lower rod 13, the second upper rod 14 and the second lower rod 15, so that the second lower rod 15 slides laterally along the horizontal slide groove 204.

[0035] The buffer assembly 30 is connected to the sliding foot of the cross-link lifting assembly 10 through the conduction rod 20, that is, the conduction rod 20 is connected to the center of the second lower rod 15, and the action direction of the buffer assembly 30 is parallel to the sliding direction of the sliding foot of the cross-link lifting assembly 10.

[0036] In this embodiment, the buffer assembly 30 adopts a spring shock absorber, including a buffer seat body 34, a first buffer plate 31, a second buffer plate 32 and a buffer spring 33 horizontally clamped between the first buffer plate 31 and the second buffer plate 32. The first buffer plate 31 and the second buffer plate 32 are made of elastic materials such as silicone. The good compression deformation and resilience of silicone itself also provide a certain buffering and shock-absorbing effect, and form a double shock-absorbing structure with the buffer spring 33, which can effectively absorb the sports impact force generated during running.

[0037] The buffer seat body 34 of this embodiment is fixedly installed on the right tube 202 by bolts, and an installation space is formed between the buffer seat body 34 and the right tube 202. The outer wall of the right tube 202 corresponding to the installation space is provided with an installation opening, and the buffer seat body 34 seals the installation opening. The first buffer plate 31 and the second buffer plate 32 are in the installation space of the buffer seat body 34. The buffer seat body 34 is provided with a guide column 35, and the guide column 35 is movably arranged through the first buffer plate 31 and the second buffer plate 32. The guide column 35 plays a guiding role for the first buffer plate 31 and the second buffer plate 32. The guide column 35 and the buffer spring 33 are both arranged horizontally, and the conduction rod 20 passes through the side wall of the right tube 202 and is connected to the first buffer plate 31 by screws.

[0038] When there is no external force on the running board 100, the cross-link lifting assembly 10 rises back to the initial height, the transmission rod 20 also returns to the initial position without force, and the first buffer plate 31 is pressed against the side wall of the right tube 202 by the buffer spring 33. When the external force causes the sliding foot of the cross-link lifting assembly 10 to move horizontally along the horizontal slide groove 204, 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.

[0039] In addition, the guide column 35 has a limit ring 37 at a position corresponding to the first buffer plate 31 and the second buffer plate 32. The limit ring 37 can limit the maximum lateral displacement of the first buffer plate 31 along the conduction rod 20 on the one hand, prevent the buffer spring 33 from deforming too much and causing failure, and protect the buffer spring 33; on the other hand, it can also limit the extreme position of the position adjustment of the second buffer plate 32.

[0040] The second buffer plate 32 of the present embodiment is provided with a threaded through hole, and an adjusting screw 36 is axially fixed at a position on the buffer seat body 34 corresponding to the threaded through hole. The adjusting screw 36 is threadedly engaged with the second buffer plate 32 at the position of the threaded through hole, and a knob is connected to the head of the adjusting screw 36. The surface of the buffer seat body 34 has a dial, and the adjusting screw 36 can be driven to rotate on the buffer seat body 34 without displacement by rotating the knob, and the second buffer plate 32 can be driven to displace laterally along the guide column 35 by threaded engagement. Different positions of the second buffer plate 32 on the adjusting screw 36 will result in different spring stiffnesses of the buffer spring 33, thereby achieving different shock absorption strengths.

[0041] In addition, the tail end of the adjusting screw 36 does not exceed the limit ring 37, so when the first buffer plate 31 moves to the position of the limit ring 37, it will not touch the adjusting screw 36, thus protecting the adjusting screw 36. However, it should be noted that in some other examples, it is not necessary to emphasize that the tail end of the adjusting screw 36 does not exceed the limit ring 37. For example, the transmission rod 20 passes through the side wall of the right tube 202 and is locked by the four corner screws through the square plate. The square plate, the transmission rod 20 and the first buffer plate 31 are respectively provided with avoidance holes at the positions corresponding to the adjusting screw 36. When the transmission rod 20 moves horizontally to the right, the tail end of the adjusting screw 36 will enter the avoidance hole of the transmission rod 20, and the diameter of the avoidance hole is larger than the diameter of the tail end of the adjusting screw 36.

[0042] Furthermore, the connecting plate 17 in this embodiment is above the middle tube 203. When the first buffer plate 31 makes a maximum lateral displacement reaching the limit stop ring 37, the connecting plate 17 abuts against the middle tube 203, thereby cooperating with the connecting plate 17 and the limit stop ring 37 to protect the buffer spring 33 and the first buffer plate 31.

[0043] The above shows and describes the basic principles, main features and advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, which shall fall within the scope of the invention to be protected. The scope of protection of the invention shall be defined by the attached claims and their equivalents.

Claims

1. The scissor-type shock-absorbing mechanism of the treadmill is characterized by: It comprises a cross-link lifting assembly and a buffer assembly, the top of the cross-link lifting assembly is on the same horizontal plane, the bottom of the first side of the cross-link lifting assembly is a fixed foot, and the bottom of the second side of the cross-link lifting assembly opposite to the first side is a sliding foot; the buffer assembly is connected to the sliding foot of the cross-link lifting assembly through a conduction rod, and the action direction of the buffer assembly is parallel to the sliding direction of the sliding foot of the cross-link lifting assembly, and the sliding direction of the sliding foot is horizontal.

2. The scissor-type shock absorbing mechanism for a treadmill according to claim 1, characterized in that: The cross-link lifting assembly includes a first upper rod, a second upper rod, a first lower rod, a second lower rod, an intermediate rod and two X-shaped links. The cross positions of the two X-shaped links are movably connected via the intermediate rod, the first side tops of the two X-shaped links are movably connected via the first upper rod, the first side bottoms of the two X-shaped links are movably connected via the first lower rod, the second side tops of the two X-shaped links are movably connected via the second upper rod, and the second side bottoms of the two X-shaped links are movably connected via the second lower rod; the first lower rod is a fixed foot, the second lower rod is a sliding foot, and the conduction rod is connected to the center of the second lower rod.

3. The scissor-type shock absorbing mechanism for a treadmill according to claim 2, characterized in that: The cross-link lifting assembly also includes a connecting plate, and the two ends of the first upper rod and the two ends of the second upper rod are respectively fixedly mounted with the connecting plates, and the top surfaces of the connecting plates are on the same horizontal plane.

4. The scissor-type shock absorbing mechanism for a treadmill according to claim 1, characterized in that: The buffer assembly adopts a spring shock absorber.

5. The scissor-type shock absorbing mechanism for a treadmill according to claim 4, characterized in that: The buffer assembly includes a first buffer plate, a second buffer plate, and a buffer spring horizontally clamped between the first buffer plate and the second buffer plate, and the first buffer plate is connected to the conductive rod.

6. The scissor-type shock absorbing mechanism for a treadmill according to claim 5, characterized in that: The buffer assembly also includes a buffer seat body, on which a guide column is provided. The guide column is movably inserted through the first buffer plate and the second buffer plate. The first buffer plate and the second buffer plate are inside the buffer seat body.

7. The scissor-type shock absorbing mechanism for a treadmill according to claim 6, characterized in that: A threaded through hole is provided on the second buffer plate, an adjusting screw is axially fixed at a position on the buffer seat corresponding to the threaded through hole, and the adjusting screw is threadably matched with the second buffer plate at the position of the threaded through hole.

8. The scissor-type shock absorbing mechanism for a treadmill according to claim 7, characterized in that: The head of the adjusting screw is connected with a knob, and the surface of the buffer seat is provided with a dial.

9. The scissor-type shock absorbing mechanism for a treadmill according to claim 6, characterized in that: The guide column has a limit stop ring at a position corresponding to the position between the first buffer plate and the second buffer plate.

10. The scissor-type shock absorbing mechanism for a treadmill according to claim 5, characterized in that: The first buffer plate and the second buffer plate are made of elastic material.

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