Negative angle adjusting mechanism of running machine and running machine

Abstract

The utility model belongs to the technical field of treadmills, and particularly relates to a treadmill negative angle adjusting mechanism and a treadmill. A negative angle adjusting mechanism of a treadmill comprises a main frame used for being fixed to the lower side of the rear end of a treadmill table, the main frame is rotationally connected with a support and a lifting frame, and the support and the lifting frame have a length difference and are used for supporting the rear end of the treadmill table; the support and the lifting frame are arranged in the left-right direction of the treadmill in a spaced mode, and a linkage structure is arranged between the support and the lifting frame and used for achieving the fact that the height changes of the lower ends of the support and the lifting frame are opposite when the support and the lifting frame rotate. When the support is supported on the ground, the lifting frame is in a suspended state, and at the moment, the running machine is in a positive-angle gradient state; when the lifting frame is supported on the ground, the support is in a suspended state, and at the moment, the treadmill is in a negative-angle gradient state. The treadmill has the advantage that the treadmill has a negative angle gradient.

Description

Technical Field

[0001] This utility model belongs to the field of treadmill technology, and in particular relates to a treadmill negative angle adjustment mechanism and a treadmill. Background Technology

[0002] Treadmills are common fitness equipment in homes, typically consisting of a base frame, running platform, handrails, and control panel. The running platform is fixed parallel to the base frame, forming a workout surface for walking or running. To simulate different workout scenarios, some treadmills are also equipped with a lifting mechanism that allows adjustment of the angle of the base frame relative to the ground, thus changing the incline of the running platform.

[0003] In existing technology, most treadmills have their lifting mechanism designed in the front half, changing the treadmill's operating state by adjusting the height of the front of the main frame. Since the rear of the treadmill rests directly on the ground, it's impossible to achieve a negative angle (lower than the rear) regardless of how the front is adjusted. Therefore, the treadmill's exercise plane is adjustable within a positive angle range. While this can simulate an incline scenario, its functionality is relatively limited, lacking more diverse exercise modes. Utility Model Content

[0004] To address the shortcomings of existing technologies, an adjustment mechanism is provided that enables a treadmill to have a negative incline.

[0005] This utility model is achieved by the following technical solution: a treadmill negative angle adjustment mechanism, including a main frame for fixing to the lower side of the rear end of the running platform, a bracket and a lifting frame rotatably connected to the main frame, the bracket and the lifting frame having a length difference and respectively used to support the rear end of the running platform;

[0006] The support frame and the lifting frame are spaced apart in the left and right directions of the running platform, and a linkage structure is provided between them. The linkage structure is used to make the height changes of their lower ends opposite when they rotate.

[0007] When the support frame is on the ground, the lifting frame is suspended in the air, and the treadmill is in a positive incline state; when the lifting frame is on the ground, the support frame is suspended in the air, and the treadmill is in a negative incline state.

[0008] In normal use, the treadmill can only adjust the incline to a positive angle. This means the support frame is on the ground, supporting the rear of the running platform, with the front slightly higher than the rear, creating an incline of approximately 1.5°. To adjust the incline to a negative angle, rotate the lifting frame so it is supported on the ground. In this position, the rear of the running platform is higher than the front, creating a negative incline that allows the user to simulate downhill movement.

[0009] The treadmill is a conventional treadmill, i.e., the front end of the treadmill has a conventional positive angle slope adjusting mechanism, which can change the slope of the running track so that the user can simulate uphill movement. In the present scheme, the height of the rear end of the running track can be higher than the front end or lower than the front end by switching the support and the lifting frame. When the height of the rear end of the running track is higher than the front end, the running track has a negative angle slope.

[0010] The linkage structure is used to realize that the heights of the lower ends of the support and the lifting frame change in opposite directions when they rotate, i.e., when the height of the lower end of the lifting frame rises, the height of the lower end of the support falls; when the height of the lower end of the lifting frame falls, the height of the lower end of the support rises. The height of the lower end refers to the distance between the lowermost end of the support and the lifting frame and the ground.

[0011] The length difference between the lifting frame and the support refers to the length of the lifting frame being longer than the length of the support, so that the height difference between the front and rear ends of the running track occurs, thereby having a positive or negative angle slope.

[0012] The linkage structure can be any conventional linkage structure, a linkage structure of a sliding groove and a sliding block, etc.

[0013] The present scheme switches the positions of the support and the lifting frame by rotating them, thereby changing the height of the rear end of the running track, so that the treadmill can be in a horizontal state or a negative angle slope state.

[0014] As a preferred embodiment, the linkage structure comprises:

[0015] A linkage member is arranged between the support and the lifting frame;

[0016] A sliding groove is formed in the support, one end of the linkage member slides and is limited in the sliding groove; and

[0017] A matching hole is formed in the lifting frame, the other end of the linkage member extends into the matching hole and rotates with the matching hole member.

[0018] The two ends of the linkage member are respectively slidably fitted and rotationally fitted in the sliding groove and the matching hole, thereby realizing the linkage between the support and the lifting frame.

[0019] As a preferred embodiment, the two ends of the sliding groove along the length direction thereof can abut against the linkage member to limit the limit positions of the rotation of the support and the lifting frame.

[0020] When the linkage member slides to the end of the sliding groove, the linkage member cannot continue to slide, thereby limiting the continuous rotation of the support and the lifting frame. This linkage structure not only realizes the linkage between the support and the lifting frame, but also limits the rotation of the support and the lifting frame to the limit positions.

[0021] As a preferred, the lifting frame is provided with a fixing member for maintaining the lifting frame in a state of being suspended or supported on the ground.

[0022] The fixing member can ensure that the lifting frame does not rotate again when supporting or not supporting the running track, and ensure the stability of the lifting frame and the support. The fixing member can be a tension spring that holds the lifting frame, a pin or screw that passes through the lifting frame and the main frame, or a linkage member that limits the sliding of the lifting frame, etc. When maintaining the state of the lifting frame, it also indirectly maintains the state of the support.

[0023] As a preferred, the fixing member is an elastic tension member, the two ends of the elastic tension member are connected to the lifting frame and the main frame respectively, and the elastic tension member applies tension to the lifting frame; the length of the elastic tension member when the lifting frame is in a state of being suspended or supported on the ground is less than the length of the elastic tension member when the lifting frame switches between the two states.

[0024] The elastic tension member applies tension to the lifting frame to maintain the fixed state of the lifting frame when it is suspended or supported on the ground, and to prevent the lifting frame from rotating in the opposite direction. When the lifting frame is in a state of being suspended or supported on the ground, the tension spring is in a state of shorter length. When the lifting frame switches between the suspended state and the supported state on the ground, the length of the elastic tension member changes from short to long and then short again, so that the elastic tension member needs more force when the lifting frame switches between the two states. Therefore, the elastic tension member can maintain the lifting frame in a state of being suspended or supported on the ground. The elastic tension member can be a tension spring, a rubber band, etc.

[0025] As a preferred, the fixing member is a fixed handle, which includes a handle part and a nut fixed on the handle part; the other end of the linkage member has an external thread structure, and the nut on the fixed handle is screwed with the other end of the linkage member, and the fixed handle is screwed to fix the lifting frame, thereby maintaining the lifting frame in a state of being suspended or supported on the ground.

[0026] The fixed handle can be loosened or tightened to rotate the lifting frame or maintain the lifting frame in a state of being suspended or supported on the ground.

[0027] As a preferred, the lower end of the support and the lifting frame is provided with a foot pad or a rotatingly connected roller.

[0028] The lower end of the lifting frame and the foot pad is provided with a foot pad or a rotatingly connected roller, which can reduce the wear of the support and the lifting frame when they contact the ground, thereby improving the service life. The foot pad can be a rubber foot pad, a silica gel foot pad, etc.

[0029] As preferred, the number of the main frames is two, and the two main frames are arranged in the left-right direction of the treadmill and are connected by the cross pipe.

[0030] The two lifting frames can rotate synchronously through the cross pipe.

[0031] As preferred, the linkage is a round head square neck screw, one end of which is provided with a round head and a square neck, and the other end is provided with a threaded segment, the size of the round head is larger than that of the sliding groove, the square neck is matched with the sliding groove and is slidably arranged in the sliding groove, and the threaded segment passes through the matching hole.

[0032] The size of the round head is larger than that of the sliding groove, and the square neck is matched with the sliding groove and is slidably arranged in the sliding groove, so that one end of the linkage is slidably arranged and limited in the sliding groove, and the other end is a threaded segment and passes through the matching hole, the threaded segment can be screwed through the ordinary fixed nut after passing through the matching hole, or can be screwed with the nut of the fixed handle, so that the round head square neck screw cannot fall off, and the rotation connection with the matching hole is also achieved.

[0033] A treadmill with the above-mentioned negative angle adjusting mechanism of the treadmill, comprising a running track and a handrail, the front end of the running track is provided with a positive angle slope adjusting mechanism, and the rear end of the running track is provided with the negative angle adjusting mechanism of the treadmill.

[0034] The positive angle slope adjusting mechanism is any existing positive angle slope adjusting mechanism, so that the user can simulate uphill running.

[0035] Compared with the prior art, the utility model has the advantages that the treadmill can be in a horizontal state or a negative angle slope state. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The running track of the treadmill has a positive angle slope structure schematic view;

[0037] Figure 2 The running track of the treadmill has a positive angle slope structure schematic view;

[0038] Figure 3 The running track of the treadmill has a positive angle slope structure schematic view;

[0039] Figure 4 The running track of the treadmill has a positive angle slope structure schematic view;

[0040] Figure 5 The linkage and the bracket have a structure schematic view;

[0041] Figure 6 The linkage has a structure schematic view;

[0042] Figure 7 is a structural schematic view of the embodiment 2;

[0043] Figure 8 is a structural schematic view of the embodiment 2 when the handle and linkage are matched.

[0044] Reference signs: 1, treadmill; 2, main frame; 21, rotating pin; 3, lifting frame; 4, support; 41, sliding groove; 5, foot pad; 6, roller; 7, cross pipe; 8, tension spring; 9, tension spring connecting screw; 10, linkage; 11, round head; 12, square neck; 13, threaded section; 14, fixed handle; 15, nut; 16, handle part; 17, fixing nut; 100, positive angle slope adjusting mechanism; 200, handrail. DETAILED DESCRIPTION

[0045] The utility model will be further described below according to the drawings and specific embodiments.

[0046] Embodiment 1

[0047] As shown in Figure 1 and Figure 2 , the embodiment 1 discloses a treadmill, which comprises a handrail 200 and a treadmill 1, and a positive angle slope adjusting mechanism 100 provided at the lower side of the front end of the treadmill 1, and two negative angle adjusting mechanisms provided at the rear end of the treadmill 1 and spaced apart left and right. The negative angle adjusting mechanisms support the rear end of the treadmill 1, and can make the rear end of the treadmill 1 lower than the front end, or the rear end of the treadmill 1 higher than the front end.

[0048] As shown in Figures 3 to 6 , the negative angle adjusting mechanism comprises a main frame 2 fixed below the treadmill 1, the main frame 2 is a U-shaped sheet metal, and the main frame 2 is rotationally connected with a support 4 and a lifting frame 3 through rotating pins 21, the support 4 is a cuboid-shaped square tube rotationally connected in the U-shaped opening of the main frame 2, and the lifting frame 3 is a crank rod rotationally connected on the inner side surface of the main frame 2; the length of the lifting frame 3 is longer than that of the support 4. The two lifting frames 3 are connected through a cross pipe 7. When the support 4 supports the ground, the lifting frame 3 is in a suspended state, and at this time, the treadmill is in a horizontal state; when the lifting frame 3 supports the ground, the support 4 is in a suspended state, and at this time, the treadmill is in a negative angle slope state.

[0049] The support 4 and the lifting frame 3 have a coinciding part in the left-right direction of the running track 1, and a linkage structure is arranged between the support 4 and the lifting frame 3. The linkage structure is composed of a linkage member 10, a sliding groove 41 and a matching hole. The sliding groove 41 is arranged on the support 4 and extends along the length direction of the support 4, and the matching hole is arranged on the lifting frame 3. The linkage member 10 is used to realize the linkage between the support 4 and the lifting frame 3. The linkage member 10 is a round-head square-neck screw, one end of which includes a round head 11 and a square neck 12, and the other end includes a threaded segment 13. The size of the round head 11 is larger than that of the sliding groove 41, the square neck 12 is matched with the sliding groove 41 and is slidably arranged in the sliding groove 41, and the threaded segment 13 is threadedly matched with a fixed nut 17 after passing through the matching hole. The two ends of the sliding groove 41 in the length direction thereof can abut against the linkage member 10, so as to limit the limit positions of the rotation of the support 4 and the lifting frame 3.

[0050] When the lifting frame 3 rotates, the linkage member 10 slides in the sliding groove 41 and can drive the support 4 to rotate, and the height change of the lower ends of the support 4 and the lifting frame 3 is opposite when they rotate. For example, when the lifting frame 3 rotates downward from the suspended state to the state of being supported on the ground, the height of the lower end of the lifting frame 3 gradually decreases and approaches the ground; the linkage member 10 slides from the upper end of the sliding groove 41 to the lower end of the sliding groove 41, and drives the support 4 to rotate, so that the height of the lower end of the support 4 gradually increases and is far away from the ground.

[0051] An arc-shaped foot pad 5 made of rubber is arranged at the lower end of the support 4. A roller 6 is rotatably connected to the lower end of the lifting frame 3.

[0052] The lifting frame 3 is matched with a fixing member, which is an elastic stretching member arranged between the main frame 2 and the lifting frame 3. The elastic stretching member is a stretching spring 8, the two ends of the stretching spring 8 are connected to the main frame 2 and the lifting frame 3 through stretching spring connecting screws 9, and the stretching spring 8 applies a pulling force to the lifting frame 3 to maintain the lifting frame 3 in the suspended state or the state of being supported on the ground. When the lifting frame 3 is in the suspended state or the state of being supported on the ground, the stretching spring 8 is in a state of having a relatively short length, and the length is smaller than that when the lifting frame 3 switches between the two states.

[0053] Embodiment 2

[0054] The difference between this embodiment 2 and the embodiment 1 is that the fixing member in this embodiment 2 is not an elastic stretching member, and the stretching spring 8 is not needed to maintain the lifting frame 3 in the suspended state and the state of being supported on the ground. Instead, the threaded segment 13 is threadedly connected with a fixed handle 14 after passing through the matching hole. The fixed handle 14 includes a handle part 16 and a nut 15 fixed on the handle part 16. By screwing the fixed handle 14, the lifting frame 3 can be clamped, so as to maintain the lifting frame 3 in the suspended state or the state of being supported on the ground.

[0055] In actual use, the user can pull the horizontal tube 7 to make the lifting frame 3 rotate. If the running track 1 needs to have a positive angle slope, that is, the front end of the running track 1 is higher than the rear end of the running track 1, at this time, the lifting frame 3 is rotated to the front side of the running track 1, so that the support 4 is supported on the ground. At this time, the state fixation of the lifting frame 3 and the support 4 is completed through the pulling force of the tension spring 8 or the tightening of the fixed handle 14.

[0056] If the running track 1 needs to have a negative angle slope, that is, the front end of the running track 1 is lower than the rear end of the running track 1, at this time, the lifting frame 3 can be rotated to the rear side of the running track 1, so that the lifting frame 3 is supported on the ground, and a Y-shaped support structure is formed between the lifting frame 3 and the support 4. At this time, the state fixation of the lifting frame 3 and the support 4 is completed through the pulling force of the tension spring 8 or the tightening of the fixed handle 14. In the embodiment, the positive angle slope of the running track is greater than 1.5°, and the negative angle slope is greater than -1.5°.

Claims

1. A treadmill negative angle adjustment mechanism characterized by: The main frame is arranged on the lower side of the rear end of the treadmill, and the support frame and the lifting frame are rotatably connected to the main frame. The support frame and the lifting frame are arranged in the left-right direction of the treadmill, and the linkage structure is arranged between the support frame and the lifting frame. When the support frame supports the ground, the lifting frame is in a suspended state, and the treadmill is in a positive angle slope state.

2. The treadmill negative angle adjustment mechanism of claim 1, wherein, The linkage structure comprises: a linkage member arranged between the support frame and the lifting frame; a sliding groove arranged on the support frame, one end of the linkage member slidingly arranged in the sliding groove; and a matching hole arranged on the lifting frame, the other end of the linkage member extending into the matching hole and being rotatably matched with the matching hole.

3. The treadmill negative angle adjustment mechanism of claim 2, wherein: The two ends of the sliding groove in the length direction are respectively abutted against the linkage member to limit the limit position of the rotation of the support frame and the lifting frame.

4. The treadmill negative angle adjustment mechanism of claim 3, wherein: The lifting frame is matched with a fixing member for maintaining the lifting frame in a suspended state or a state of supporting the ground.

5. The treadmill negative angle adjustment mechanism of claim 4, wherein: The fixing member is an elastic stretching member, and the two ends of the elastic stretching member are respectively connected to the lifting frame and the main frame.

6. The treadmill negative angle adjustment mechanism of claim 4, wherein: The fixing member is a fixed handle comprising a handle part and a nut fixed on the handle part.

7. The negative angle adjustment mechanism for a treadmill of any one of claims 1 to 6, wherein: The other end of the linkage member has an external thread structure, the nut on the fixed handle is threadedly matched with the other end of the linkage member, and the fixed handle is screwed to fix the lifting frame, thereby maintaining the lifting frame in a suspended state or a state of supporting the ground.

8. The negative angle adjustment mechanism for a treadmill of any one of claims 1 to 6, wherein: The lower ends of the support frame and the lifting frame are provided with foot pads or rotatably connected with rollers.

9. The negative angle adjustment mechanism for a treadmill of any one of claims 2 to 6, wherein: The number of the main frames is two, and the two main frames are arranged in the left-right direction of the treadmill.

10. A treadmill having the negative angle adjustment mechanism of any one of claims 1 to 9. The linkage member is a round head square neck screw, one end of the round head square neck screw is provided with a round head part and a square neck part, and the other end is provided with a threaded segment. The treadmill and the handrail are provided.

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