Incline adjustment mechanism for treadmills

Abstract

The present application discloses a slope adjustment mechanism for a treadmill, comprising: a base; a treadmill frame, one end of which is rotatably connected to the base; an adjustment motor fixedly connected to the base; a first lifting assembly, comprising a first worm gear mechanism, a first telescopic screw, a first fixed seat, a first connecting rod mechanism, and a first support mechanism, wherein the first fixed seat is fixedly connected to the base, one end of the first connecting rod mechanism is rotatably connected to the first telescopic screw, the other end of the first connecting rod mechanism is rotatably connected to the first support mechanism, one end of the first support mechanism is rotatably connected to the base, the other end of the first support mechanism supports the treadmill frame, the first telescopic screw is slidably connected to the first fixed seat, the first worm gear mechanism is connected to the first telescopic screw; and a second lifting assembly, comprising a second worm gear mechanism, a second telescopic screw, a second fixed seat, a second connecting rod mechanism, and a second support mechanism. The mechanism has a strong load-bearing capacity and can meet the load-bearing capacity requirements of a treadmill.

Description

Technical Field

[0001] The present invention generally relates to the field of fitness equipment, specifically to the field of treadmills, and more particularly to a slope adjustment mechanism for a treadmill. Background Art

[0002] Using fitness equipment to exercise has become the choice of many people. Treadmills are common fitness equipment in homes and gyms. They are the simplest type of home fitness equipment today and the best choice for home fitness equipment.

[0003] Compared to home or commercial treadmills, treadmills are larger, heavier, and suitable for a wider range of training scenarios. They can be used for cycling, roller skating, simulated skiing, and wheelchair training. To meet different training needs, the treadmill's incline needs to be adjustable. The incline adjustment range needs to cover both positive and negative angles to simulate different training scenarios. The load-bearing capacity of the incline adjustment mechanism on traditional treadmills is insufficient to meet treadmill requirements. There is an urgent need for a treadmill incline adjustment mechanism that can meet these load-bearing requirements. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a slope adjustment mechanism for a treadmill with a strong load-bearing capacity.

[0005] In a first aspect, the present invention provides a treadmill slope adjustment mechanism, comprising:

[0006] base;

[0007] a treadmill frame, one end of which is rotatably connected to the base;

[0008] an adjusting motor fixedly connected to the base;

[0009] a first lifting assembly, comprising a first worm gear mechanism, a first telescopic screw, a first fixed seat, a first connecting rod mechanism, and a first supporting mechanism, wherein the first fixed seat is fixedly connected to the base, one end of the first connecting rod mechanism is rotatably connected to the first telescopic screw, the other end of the first connecting rod mechanism is rotatably connected to the first supporting mechanism, one end of the first supporting mechanism is rotatably connected to the base, the other end of the first supporting mechanism supports the treadmill, the first telescopic screw is slidably connected to the first fixed seat, and the first worm gear mechanism is connected to the first telescopic screw; and

[0010] The second lifting assembly includes a second worm gear mechanism, a second telescopic screw, a second fixed seat, a second connecting rod mechanism and a second supporting mechanism, the second fixed seat is fixedly connected to the base, one end of the second connecting rod mechanism is rotatably connected to the second telescopic screw, the other end of the second connecting rod mechanism is rotatably connected to the second supporting mechanism, one end of the second supporting mechanism is rotatably connected to the base, the other end of the second supporting mechanism supports the treadmill, the second telescopic screw is slidably connected to the second fixed seat, and the second worm gear mechanism is connected to the second telescopic screw.

[0011] The first lifting assembly and the second lifting assembly are symmetrically arranged, and the adjustment motor drives the first worm gear mechanism and the second worm gear mechanism to move synchronously, thereby driving the first telescopic screw and the second telescopic screw to extend and retract synchronously.

[0012] According to the technical solution provided in the embodiment of the present application, the first telescopic screw is driven to extend and retract by the first worm gear mechanism, the first telescopic screw drives the first supporting mechanism to move through the first connecting rod mechanism, the second worm gear mechanism drives the second telescopic screw to extend and retract, the second telescopic screw drives the second supporting mechanism to move through the second connecting rod mechanism, and the adjusting motor drives the first worm gear mechanism and the second worm gear mechanism to move synchronously, that is, drives the first telescopic screw and the second telescopic screw to extend and retract synchronously, that is, drives the first supporting mechanism and the second supporting mechanism to rotate synchronously, and the treadmill frame will press against the first supporting mechanism and the second supporting mechanism and rotate under the action of its own gravity, thereby realizing the adjustment of the slope of the treadmill frame, and has a strong load-bearing capacity, which can meet the load-bearing capacity requirements of the treadmill. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0014] Figure 1 A front view of a treadmill frame of a treadmill slope adjustment mechanism according to an embodiment of the present invention at a maximum inclination position;

[0015] Figure 2 A right side view of the treadmill frame of the treadmill slope adjustment mechanism according to an embodiment of the present invention, showing the treadmill frame at a maximum inclination position;

[0016] Figure 3 A perspective view of a treadmill frame of a treadmill slope adjustment mechanism according to an embodiment of the present invention, wherein the treadmill frame is at a maximum inclination position;

[0017] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0018] Figure 5A perspective view of a treadmill frame of a treadmill slope adjustment mechanism according to an embodiment of the present invention, wherein the treadmill frame is at a maximum inclination position;

[0019] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0020] Figure 7 A perspective view of a treadmill frame of a treadmill slope adjustment mechanism according to an embodiment of the present invention, wherein the treadmill frame is at a maximum inclination position;

[0021] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0022] Figure 9 A perspective view of a treadmill frame of a treadmill slope adjustment mechanism according to an embodiment of the present invention, wherein the treadmill frame is at a maximum inclination position;

[0023] Figure 10 for Figure 9 A partial enlarged view of point D in the middle;

[0024] Figure 11 This is a schematic structural diagram of a treadmill slope adjustment mechanism without the treadmill frame according to an embodiment of the present invention;

[0025] Figure 12 for Figure 11 A partial enlarged view of point E in the middle;

[0026] Figure 13 This is a schematic structural diagram of a treadmill slope adjustment mechanism without the treadmill frame according to an embodiment of the present invention;

[0027] Figure 14 for Figure 13 A partial enlarged view of point F in the middle;

[0028] Figure 15 This is a schematic structural diagram of a treadmill frame in a horizontal position of a treadmill slope adjustment mechanism according to an embodiment of the present invention;

[0029] Figure 16 This is a structural schematic diagram of a treadmill frame of a treadmill slope adjustment mechanism according to an embodiment of the present invention in a position with a minimum inclination angle. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Please refer to Figures 1 to 16 , the slope adjustment mechanism for a treadmill of the present invention includes: a base 100; a treadmill frame 200, one end of which is rotatably connected to the base 100; an adjusting motor 300, which is fixedly connected to the base 100; a first lifting assembly 400, which includes a first worm gear mechanism 410, a first telescopic screw 420, a first fixed seat 430, a first connecting rod mechanism 440 and a first supporting mechanism 450, the first fixed seat 430 is fixedly connected to the base 100, one end of the first connecting rod mechanism 440 is rotatably connected to the first telescopic screw 420, the other end of the first connecting rod mechanism 440 is rotatably connected to the first supporting mechanism 450, one end of the first supporting mechanism 450 is rotatably connected to the base 100, the other end of the first supporting mechanism 450 supports the treadmill frame 200, the first telescopic screw 420 is slidably connected to the first fixed seat 430, the first worm gear mechanism 410 is connected to the first telescopic screw 420; and a second lifting assembly 500, which includes a second worm gear mechanism 510, a second telescopic screw 520, a second fixed seat 530, a second connecting rod mechanism 540 and a second supporting mechanism 550, the second fixed seat 530 is fixedly connected to the base 100, one end of the second connecting rod mechanism 540 is rotatably connected to the second telescopic screw 520, and the other end of the second connecting rod mechanism 540 is rotatably connected to the second supporting mechanism 550, one end of the second supporting mechanism 550 is rotatably connected to the base 100, and the other end of the second supporting mechanism 550 supports the treadmill 200, the second telescopic screw 520 is slidably connected to the second fixed seat 530, the second worm gear mechanism 510 is connected to the second telescopic screw 520, the first lifting assembly 400 and the second lifting assembly 500 are symmetrically arranged, and the adjusting motor 300 drives the first worm gear mechanism 410 and the second worm gear mechanism 510 to move synchronously, thereby driving the first telescopic screw 420 and the second telescopic screw 520 to extend and retract synchronously.

[0033] In an embodiment of the present invention, the base supports the entire treadmill. The treadmill frame is rotatably connected to front and rear rollers, respectively. A looped running belt wraps around the front and rear rollers, and the rotation of the front roller drives the looped running belt. Support blocks can be provided on the base, with one end of the front roller rotatably connected to one support block, and the other end of the front roller rotatably connected to another support block, thereby achieving a rotatable connection between one end of the treadmill frame and the base. The support blocks create a space between the treadmill frame and the base to accommodate the adjustment motor, the first lifting assembly, and the second lifting assembly. During actual treadmill installation, to facilitate user training, a pit is dug at the installation location. The base, the first lifting assembly, and the second lifting assembly are placed within the pit, raising the treadmill frame slightly above the ground and facilitating user access to the training space. The base can be provided with, but is not limited to, multiple support pads 180 on the side facing away from the treadmill frame. The position of the support pads relative to the base can be adjusted. During installation and commissioning of the treadmill, the support pads can be adjusted to maintain the base level, thereby reducing the requirement for pit floor flatness.

[0034] The base includes a first transverse tube 191, a second transverse tube 192, a first longitudinal tube 193, and a second longitudinal tube 194. The first transverse tube is parallel to the second transverse tube, and the first longitudinal tube is parallel to the second longitudinal tube. The first and second transverse tubes are respectively welded to the first longitudinal tube, and the first and second transverse tubes are respectively welded to the second longitudinal tube, ensuring the strength of the base. The base also has a third transverse tube located between the first and second transverse tubes. The first and second longitudinal tubes are respectively welded to the third transverse tube, further enhancing the strength of the base. The adjustment motor is detachably fixed to the third transverse tube, ensuring the base's reliable support for the adjustment motor.

[0035] The first lifting assembly includes a first worm gear mechanism, a first telescopic screw, a first fixed seat, a first connecting rod mechanism, and a first support mechanism. The first worm gear mechanism can drive the first telescopic screw to extend and retract relative to the first fixed seat. The first telescopic screw is rotatably connected to the first connecting rod mechanism, which is rotatably connected to the first support mechanism. The first support mechanism is rotatably connected to the base, forming a crank slider mechanism. The first fixed seat is extended and retracted, driving the first support mechanism to rotate. During the rotation of the first support mechanism, the treadmill frame will press against the first support mechanism due to its own gravity, and the treadmill frame will also rotate with the first support mechanism. During the rotation of the treadmill frame, the first support mechanism always supports the treadmill frame, ensuring the stability, reliability, and load-bearing capacity of the treadmill frame. Of course, during the slope adjustment process of the treadmill, the angle between the first connecting rod mechanism and the first support mechanism is less than 180° to avoid the situation where the first telescopic screw cannot pull the first support mechanism to rotate, thereby ensuring the reliability of the slope adjustment mechanism. When the first supporting mechanism supports the treadmill frame, the treadmill frame applies pressure to the first supporting mechanism. At this time, the first connecting rod mechanism bears the tension along its length direction, and the first telescopic screw bears the tension along its length direction, which further ensures the stability and reliability of the first lifting assembly supporting the treadmill frame and ensures the carrying capacity of the treadmill frame.

[0036] The second lifting assembly includes a second worm gear mechanism, a second telescopic screw, a second fixed seat, a second connecting rod mechanism, and a second support mechanism. The second worm gear mechanism can drive the second telescopic screw to extend and retract relative to the second fixed seat. The second telescopic screw is rotatably connected to the second connecting rod mechanism, which is rotatably connected to the second support mechanism, and the second support mechanism is rotatably connected to the base, forming a crank slider mechanism. The second fixed seat is extended and retracted, driving the second support mechanism to rotate. During the rotation of the second support mechanism, the treadmill frame will press against the second support mechanism due to its own gravity, and the treadmill frame will also rotate with the second support mechanism. During the rotation of the treadmill frame, the second support mechanism always supports the treadmill frame, ensuring the stability, reliability, and load-bearing capacity of the treadmill frame. Of course, during the slope adjustment process of the treadmill, the angle between the second connecting rod mechanism and the second support mechanism is less than 180° to avoid the situation where the second telescopic screw cannot pull the second support mechanism to rotate, thereby ensuring the reliability of the slope adjustment mechanism. When the second supporting mechanism supports the treadmill frame, the treadmill frame applies pressure to the second supporting mechanism. At this time, the second connecting rod mechanism bears the tension along its length direction, and the second telescopic screw bears the tension along its length direction, which further ensures the stability and reliability of the second lifting assembly supporting the treadmill frame and ensures the carrying capacity of the treadmill frame.

[0037] The regulating motor drives the first and second worm gear mechanisms synchronously through a dual-axis output diverter 310. Specifically, the first worm gear mechanism includes a first worm and a first worm wheel, which are threadedly connected. Rotation of the first worm drives rotation of the first worm wheel. The first worm wheel and the first worm are each rotatably connected to a first fixed base. A first telescopic screw passes through the first worm and is threadedly connected to the first worm. Rotation of the first worm drives rotation of the first worm wheel, which drives the first telescopic screw to extend and retract relative to the first fixed base. The second worm gear mechanism includes a second worm and a second worm wheel, which are threadedly connected. Rotation of the second worm drives rotation of the second worm wheel. The second worm wheel and the second worm are each rotatably connected to a second fixed base. The second telescopic screw passes through the second worm and is threadedly connected to the second worm. Rotation of the second worm drives rotation of the second worm wheel, which drives the second telescopic screw to extend and retract relative to the second fixed base. Worm gear mechanisms offer advantages such as high stability, low vibration or wobbling, strong load-bearing capacity, and high precision. It can meet the high load-bearing capacity requirements of the treadmill frame. During the slope adjustment process, the treadmill frame is less likely to shake or wobble, adjustment is more stable, and the treadmill slope can be adjusted more accurately. The adjustment motor drives the first and second worm gears to rotate synchronously through the dual-axis output steering gear 310, ensuring the synchronization of the rotation of the first and second support mechanisms. The symmetrical arrangement of the first and second lifting assemblies allows the first and second support mechanisms to simultaneously support the treadmill frame during the treadmill slope adjustment process, ensuring the stability of the treadmill slope adjustment.

[0038] Furthermore, the first support mechanism 450 includes a first support tube 451 and a first connecting member 452, the first connecting member 452 is fixedly connected to the side of the first support tube 451 facing the first telescopic screw 420, and the first connecting member 452 is rotatably connected to the first connecting rod mechanism 440, and the second support mechanism 550 includes a second support tube 551 and a second connecting member 552, the second connecting member 552 is fixedly connected to the side of the second support tube 551 facing the second telescopic screw 520, and the second connecting member 552 is rotatably connected to the second connecting rod mechanism 540.

[0039] In an embodiment of the present invention, the first support tube and the first connecting member are welded together, ensuring a reliable connection between the first support tube and the first connecting member. The first connecting member is rotatably connected to the first connecting rod mechanism. The provision of the first connecting member facilitates the rotatable connection between the first support mechanism and the first connecting rod mechanism. The side of the first connecting member facing the treadmill frame serves as a first support surface. When the treadmill frame is at its minimum inclination, the first support surface contacts the treadmill frame, further enhancing the stability of the treadmill frame at this position.

[0040] The second support tube and the second connecting member are welded together, ensuring a secure connection between the two. The second connecting member is pivotally connected to the second connecting rod mechanism, facilitating the pivotal connection between the second support mechanism and the second connecting rod mechanism. The side of the second connecting member facing the treadmill serves as a second support surface. When the treadmill is at its lowest inclination, the second support surface contacts the treadmill, further enhancing the treadmill's stability when in this position.

[0041] Furthermore, the first connecting member 452 includes a first U-shaped plate 4521, and the first U-shaped plate 4521 includes a first bottom plate, a first folded edge and a second folded edge. The first folded edge and the second folded edge are fixedly connected to both sides of the first support tube 451 respectively. The first bottom plate abuts against the side of the first support tube 451 facing the first telescopic screw 420. The side of the first U-shaped plate 4521 facing away from the first support tube 451 is fixedly connected with a first connecting plate 4522 and a second connecting plate 4523 that are spaced apart and arranged oppositely. The first connecting plate 4522 and the second connecting plate 4523 are respectively rotated with the first connecting rod mechanism 440 The second connecting member 552 includes a second U-shaped plate 5521, and the second U-shaped plate 5521 includes a second bottom plate, a third folded edge and a fourth folded edge. The third folded edge and the fourth folded edge are respectively fixedly connected to the two sides of the second support tube 551, and the second bottom plate abuts against the side of the second support tube 551 facing the second telescopic screw 520. The side of the second U-shaped plate 5521 facing away from the second support tube 551 is fixedly connected with a third connecting plate 5522 and a fourth connecting plate 5523 that are spaced apart and opposite to each other. The third connecting plate 5522 and the fourth connecting plate 5523 are respectively rotatably connected to the second connecting rod mechanism 540.

[0042] In an embodiment of the present invention, the first connecting member includes a first U-shaped plate, which includes a first base plate, a first folded edge, and a second folded edge. The first base plate, the first folded edge, and the second folded edge are respectively fixedly connected to the first support tube, ensuring the connection strength between the first connecting member and the first support tube. The first folded edge and the second folded edge are formed by bending the first base plate, which facilitates processing. The first folded edge and the second folded edge are respectively fixedly connected to the two sides of the first support tube, which can increase the contact area between the first folded edge and the first support tube and ensure the connection strength between the first U-shaped plate and the first support tube. The first U-shaped plate is fixedly connected to the first connecting plate and the second connecting plate. The first connecting plate and the second connecting plate are respectively rotatably connected to the first connecting rod mechanism, ensuring the reliability of the rotational connection between the first connecting rod mechanism and the first connecting member. At the same time, when the first support mechanism supports the treadmill, the first connecting rod mechanism transmits tensile force to the first U-shaped plate through the first connecting plate and the second connecting plate. By providing the first connecting plate and the second connecting plate, the force on the first U-shaped plate is more balanced.

[0043] The second connecting member includes a second U-shaped plate, which includes a second base plate, a third folded edge, and a fourth folded edge. The second base plate, the third folded edge, and the fourth folded edge are each fixedly connected to the second support tube, ensuring the strength of the connection between the second connecting member and the second support tube. The third folded edge and the fourth folded edge are formed by bending the second base plate, facilitating processing. The third folded edge and the fourth folded edge are each fixedly connected to the sides of the second support tube, increasing the contact area between the third folded edge and the second support tube and ensuring the strength of the connection between the second U-shaped plate and the second support tube. The second U-shaped plate is fixedly connected to a third connecting plate and a fourth connecting plate, which are each rotationally connected to the second linkage mechanism, ensuring the reliability of the rotational connection between the second linkage mechanism and the second connecting member. Furthermore, when the second support mechanism supports the treadmill, the second linkage mechanism transmits tensile force to the second U-shaped plate via the third and fourth connecting plates. By providing the third and fourth connecting plates, the force applied to the second U-shaped plate is more evenly balanced.

[0044] Furthermore, the first connecting rod mechanism 440 includes a first sub-connecting rod 441 and a second sub-connecting rod 442, the first sub-connecting rod 441 and the second sub-connecting rod 442 are connected by a first synchronization plate 443, the first connecting plate 4522 is detachably fixedly connected to the first reinforcing plate 4522a on the side facing away from the second connecting plate 4523, the first reinforcing plate 4522a and the first connecting plate 4522 are respectively fixedly connected to the first rotating shaft 4522b, the first sub-connecting rod 441 is rotatably connected to the first rotating shaft 4522b, and the first The sub-connecting rod 441 is partially located between the first reinforcing plate 4522a and the first connecting plate 4522, and the second connecting plate 4523 is detachably fixedly connected to the second reinforcing plate 4523a on the side facing away from the first connecting plate 4522. The second reinforcing plate 4523a and the second connecting plate 4523 are respectively fixedly connected to the second rotating shaft 4523b, and the second sub-connecting rod 442 is rotatably connected to the second rotating shaft 4523b. The second sub-connecting rod 442 is partially located between the second reinforcing plate 4523a and the second connecting plate 4523.

[0045] In an embodiment of the present invention, the first linkage mechanism includes a first sub-link and a second sub-link, which are connected by a first synchronization plate. The first synchronization plate can ensure the strength of the first and second sub-links and enable the first and second sub-links to move synchronously. The first and second sub-links are respectively rotatably connected to the first U-shaped plate, ensuring balanced force on the first U-shaped plate. The first and second sub-links are respectively rotatably connected to the first telescopic screw, ensuring balanced force on the first telescopic screw. A first reinforcement plate is detachably fixedly connected to the side of the first connecting plate facing away from the second connecting plate. The first reinforcement plate and the first connecting plate are respectively fixedly connected to the first rotating shaft. The first sub-link is rotatably connected to the first rotating shaft, achieving a rotational connection between the first sub-link and the first connecting plate. The first sub-link is partially located between the first reinforcement plate and the first connecting plate. When the first support mechanism supports the treadmill, the first sub-link applies a tensile force to the first rotating shaft, ensuring balanced force on both ends of the first rotating shaft. The first reinforcing plate can be detachably fixedly connected to the first connecting plate by a plurality of bolts, so as to facilitate assembly of the first rotating shaft and the first sub-connecting rod.

[0046] A second reinforcing plate is removably fixedly connected to the side of the second connecting plate facing away from the first connecting plate. The second reinforcing plate and the second connecting plate are each fixedly connected to the second rotating shaft. The second sub-connecting rod is rotatably connected to the second rotating shaft, thereby achieving a rotational connection between the second sub-connecting rod and the second connecting plate. The second sub-connecting rod is partially located between the second reinforcing plate and the second connecting plate. When the first support mechanism supports the treadmill, the second sub-connecting rod applies a tensile force to the second rotating shaft, ensuring balanced force at both ends of the second rotating shaft. The second reinforcing plate is removably fixedly connected to the second connecting plate via multiple bolts, facilitating assembly of the second rotating shaft and the second sub-connecting rod.

[0047] Furthermore, a first partition block 4522c is provided between the first connecting plate 4522 and the first reinforcing plate 4522a, and a second partition block 4523c is provided between the second connecting plate 4523 and the second reinforcing plate 4523a.

[0048] In an embodiment of the present invention, the first spacer maintains a sufficient spacing between the first connecting plate and the first reinforcing plate for the transmission of the first sub-connecting rod, thereby ensuring smooth rotational connection between the first sub-connecting rod and the first connecting plate. The second spacer maintains a sufficient spacing between the second connecting plate and the second reinforcing plate for the transmission of the second sub-connecting rod, thereby ensuring smooth rotational connection between the second sub-connecting rod and the second connecting plate.

[0049] Furthermore, the second connecting rod mechanism 540 includes a third sub-connecting rod 541 and a fourth sub-connecting rod 542. The third sub-connecting rod 541 and the fourth sub-connecting rod 542 are connected by a second synchronization plate 543. The third connecting plate 5522 is detachably fixedly connected to a third reinforcing plate 5522a on the side facing away from the fourth connecting plate 5523. The third reinforcing plate 5522a and the third connecting plate 5522 are respectively fixedly connected to the third rotating shaft 5522b. The third sub-connecting rod 541 is rotatably connected to the third rotating shaft 5522b. The sub-connecting rod 541 is partially located between the third reinforcing plate 5522a and the third connecting plate 5522, and the fourth connecting plate 5523 is detachably fixedly connected to the fourth reinforcing plate 5523a on the side facing away from the third connecting plate 5522. The fourth reinforcing plate 5523a and the fourth connecting plate 5523 are respectively fixedly connected to the fourth rotating shaft 5523b, and the fourth sub-connecting rod 542 is rotatably connected to the fourth rotating shaft 5523b. The fourth sub-connecting rod 542 is partially located between the fourth reinforcing plate 5523a and the fourth connecting plate 5523.

[0050] In an embodiment of the present invention, the second linkage mechanism includes a third sub-link and a fourth sub-link, which are connected by a second synchronization plate. The second synchronization plate ensures the strength of the third and fourth sub-links and enables their synchronous movement. The third and fourth sub-links are each rotationally connected to the second U-shaped plate, ensuring balanced force on the second U-shaped plate. The third and fourth sub-links are each rotationally connected to the second telescopic screw, ensuring balanced force on the second telescopic screw. A third reinforcement plate is detachably fixedly connected to the side of the third connecting plate facing away from the fourth connecting plate. The third reinforcement plate and the third connecting plate are each fixedly connected to a third rotating shaft. The third sub-link is rotationally connected to the third rotating shaft, achieving a rotational connection between the third sub-link and the third connecting plate. The third sub-link is partially located between the third reinforcement plate and the third connecting plate. When the second support mechanism supports the treadmill, the third sub-link applies tension to the third rotating shaft, ensuring balanced force on both ends of the third rotating shaft. The third reinforcing plate can be detachably fixedly connected to the third connecting plate by a plurality of bolts, so as to facilitate assembly of the third rotating shaft and the third sub-connecting rod.

[0051] A fourth reinforcing plate is removably fixedly connected to the side of the fourth connecting plate facing away from the third connecting plate. The fourth reinforcing plate and the fourth connecting plate are each fixedly connected to the fourth rotating shaft. The fourth sub-connecting rod is rotationally connected to the fourth rotating shaft, thereby achieving a rotational connection between the fourth sub-connecting rod and the fourth connecting plate. The fourth sub-connecting rod is partially located between the fourth reinforcing plate and the fourth connecting plate. When the second support mechanism supports the treadmill frame, the fourth sub-connecting rod applies a tensile force to the fourth rotating shaft, ensuring balanced force at both ends of the fourth rotating shaft. The fourth reinforcing plate is removably fixedly connected to the fourth connecting plate via multiple bolts, facilitating assembly of the fourth rotating shaft and the fourth sub-connecting rod.

[0052] Furthermore, a third partition block 5522c is provided between the third connecting plate 5522 and the third reinforcing plate 5522a, and a fourth partition block 5523c is provided between the fourth connecting plate 5523 and the fourth reinforcing plate 5523a.

[0053] In an embodiment of the present invention, the third spacer maintains a sufficient spacing between the third connecting plate and the third reinforcing plate for transmission of the third sub-connecting rod, thereby ensuring smooth rotational connection between the third sub-connecting rod and the third connecting plate. The fourth spacer maintains a sufficient spacing between the fourth connecting plate and the fourth reinforcing plate for transmission of the fourth sub-connecting rod, thereby ensuring smooth rotational connection between the fourth sub-connecting rod and the fourth connecting plate.

[0054] Furthermore, the first support mechanism 450 includes a first support roller 453, a second support roller 4532 and a third support roller 4533 arranged in sequence, and the second support mechanism 550 includes a fourth support roller 553, a fifth support roller 5532 and a sixth support roller 5533 arranged in sequence. During the rotation of the treadmill 200, the second support roller 4532 and the fifth support roller 5532 are always in contact with the treadmill 200. When the treadmill 200 is at the position with the smallest inclination angle, the first support roller 453, the second support roller 4532, the fourth support roller 553 and the fifth support roller 5532 respectively support the treadmill 200. When the treadmill 200 is at the position with the largest inclination angle, the second support roller 4532, the third support roller 4533, the fifth support roller 5532 and the sixth support roller 5533 respectively support the treadmill 200.

[0055] In an embodiment of the present invention, the first, second, and third support rollers are each rotatably connected to the first support tube. During the treadmill slope adjustment process, the first, second, and third support rollers are able to roll when in contact with the treadmill frame, reducing friction between the first support mechanism and the treadmill frame and facilitating smoother treadmill slope adjustment. The distances between the first, second, and third support rollers and the first linkage gradually increase, that is, the distance between the first support roller and the first linkage is smaller than the distance between the third support roller and the first linkage. The first support tube is provided with a first opening 4511, through which the first, second, and third support rollers are each partially inserted into the first support tube. The provision of the first opening 4511 facilitates assembly of the first, second, and third support rollers. Of course, multiple first reinforcement members 4512 can be installed in the first opening 4511, with the first reinforcement tubes fixedly connected at both ends of the first reinforcement members 4512 to prevent the first opening 4511 from opening during use. The first, second, and third support rollers are partially exposed from one side of the first support tube, ensuring that the first, second, and third support rollers can support the treadmill frame.

[0056] The fourth, fifth, and sixth support rollers are each rotatably connected to the second support tube. During slope adjustment of the treadmill, the fourth, fifth, and sixth support rollers are able to roll when in contact with the treadmill frame, reducing friction between the second support mechanism and the treadmill frame and enabling smoother slope adjustment. The distances between the fourth, fifth, and sixth support rollers and the second connecting rod mechanism gradually increase, that is, the distance between the fourth support roller and the second connecting rod mechanism is smaller than the distance between the sixth support roller and the second connecting rod mechanism. The second support tube is provided with a second opening 5511, through which the fourth, fifth, and sixth support rollers are each partially inserted into the second support tube. The provision of the second opening 5511 facilitates assembly of the fourth, fifth, and sixth support rollers. Of course, multiple second reinforcement members 5512 can be installed in the second opening 5511, with the ends of the second reinforcement members 5512 fixedly connected to the second reinforcement tube to prevent the second opening 5511 from opening during use. The fourth, fifth, and sixth support rollers are partially exposed from one side of the second support tube, ensuring that the fourth, fifth, and sixth support rollers can support the treadmill frame.

[0057] When the treadmill frame is in the position with the smallest inclination angle, that is, when the end of the treadmill frame away from the front roller is in the lowest vertical position, the first support roller, the second support roller, the fourth support roller and the fifth support roller respectively support the treadmill frame, so that the first support mechanism and the second support mechanism are subjected to balanced force, thereby ensuring the stability and reliability of the treadmill frame supported by the first support mechanism and the second support mechanism, and ensuring that the treadmill has a good load-bearing capacity.

[0058] When the treadmill frame is in the position with the largest inclination angle, that is, when the end of the treadmill frame away from the front roller is in the highest vertical position, the second support roller, the third support roller, the fifth support roller and the sixth support roller respectively support the treadmill frame, so that the first support mechanism and the second support mechanism are subjected to balanced force, thereby ensuring the stability and reliability of the treadmill frame supported by the first support mechanism and the second support mechanism, and ensuring that the treadmill has a good load-bearing capacity.

[0059] Furthermore, the side of the treadmill 200 facing the first supporting mechanism 450 is fixedly connected to the first guide protrusion 210, and the first supporting roller 453, the second supporting roller 4532 and the third supporting roller 4533 are respectively provided with a first guide groove 4531 that cooperates with the first guide protrusion 210, and the side of the treadmill 200 facing the second supporting mechanism 550 is fixedly connected to the second guide protrusion 211, and the fourth supporting roller 553, the fifth supporting roller 5532 and the sixth supporting roller 5533 are respectively provided with a second guide groove 5531 that cooperates with the second guide protrusion 211.

[0060] In an embodiment of the present invention, when the first, second, or third support rollers are supporting the treadmill frame, the first guide protrusion is positioned within the first guide groove, thereby preventing the first support mechanism from shifting while supporting the treadmill frame, thereby ensuring the stability of the treadmill frame supported by the first support mechanism. During the treadmill slope adjustment process, when the first, second, or third support rollers are rollingly engaged with the treadmill frame, the first guide protrusion is positioned within the first guide groove. The engagement of the first guide protrusion with the first guide groove prevents the first, second, or third support rollers from shifting during rolling, thereby ensuring the stability of the treadmill slope adjustment.

[0061] When the fourth, fifth, or sixth support rollers are supporting the treadmill frame, the second guide protrusions are positioned within the second guide grooves, preventing the second support mechanism from shifting while supporting the treadmill frame, thereby ensuring the stability of the treadmill frame. During the treadmill slope adjustment process, when the fourth, fifth, or sixth support rollers are rolling in engagement with the treadmill frame, the second guide protrusions are positioned within the second guide grooves. The engagement of the second guide protrusions with the second guide grooves prevents the fourth, fifth, or sixth support rollers from shifting during rolling, thereby ensuring the stability of the treadmill slope adjustment.

[0062] Furthermore, the base 100 is detachably fixedly connected with a first cross bar 110 and a second cross bar 120, the first cross bar 110 is parallel to the second cross bar 120, the first cross bar 110 is located below the first support mechanism 450, and the portion of the first cross bar 110 located on the movement path of the first support mechanism 450 is provided with a first avoidance groove 111, the second cross bar 120 is located below the second support mechanism 550, and the portion of the second cross bar 120 located on the movement path of the second support mechanism 550 is provided with a second avoidance groove 121.

[0063] In an embodiment of the present invention, the first crossbar is located below the first support mechanism, and may be, but is not limited to, rotatably connected to the first support mechanism and the first crossbar. The first crossbar is provided with a first avoidance groove, and when the treadmill frame is at the position with the smallest inclination angle, the first support mechanism is partially placed in the first avoidance groove. By providing the first avoidance groove, it is possible to avoid the first crossbar from interfering with the movement of the first support mechanism. At the same time, there is no need to set the distance between the base and the treadmill frame to be too large, making the structure of the treadmill more compact. The second crossbar is located below the second support mechanism, and may be, but is not limited to, rotatably connected to the second support mechanism and the second crossbar. The second crossbar is provided with a second avoidance groove, and when the treadmill frame is at the position with the smallest inclination angle, the second support mechanism is partially placed in the second avoidance groove. By providing the second avoidance groove, it is possible to avoid the second crossbar from interfering with the movement of the second support mechanism. At the same time, there is no need to set the distance between the base and the treadmill frame to be too large, making the structure of the treadmill more compact.

[0064] The base is detachably fixedly connected to the first and second crossbars. The first and second crossbars can be detachably fixedly connected to the base via bolts, respectively. When processing the first avoidance groove, only the first crossbar needs to be placed into the processing equipment, without the need to place the entire base into the processing equipment, which facilitates processing of the first avoidance groove. When processing the second avoidance groove, only the second crossbar needs to be placed into the processing equipment, without the need to place the entire base into the processing equipment, which facilitates processing of the second avoidance groove.

[0065] Furthermore, a first stop 112 is fixedly connected to the side of the first cross bar 110 facing the treadmill 200, and a second stop 122 is fixedly connected to the side of the second cross bar 120 facing the treadmill 200. The first stop 112 and the second stop 122 are respectively located on the movement path of the treadmill 200. When the treadmill 200 is at the position with the smallest inclination angle, the first stop 112 and the second stop 122 respectively support the treadmill 200.

[0066] In an embodiment of the present invention, when the treadmill frame is at its minimum inclination, the first and second stops respectively support the treadmill frame, and the first and second stops serve to limit the rotational range of the treadmill frame. Alternatively, but not limited to, when the treadmill frame is at its minimum inclination, the first and second stops are respectively perpendicular to the treadmill frame, the first stop being perpendicular to the first crossbar, and the second stop being perpendicular to the second crossbar. This ensures that when the first and second stops support the treadmill frame, they are both subjected to force along the length direction, ensuring the reliability of the first and second stops in supporting the treadmill frame.

[0067] Furthermore, the second stop member 122 is fixedly connected to a first limit sensor 1221, the first limit sensor 1221 is electrically connected to the adjustment motor 300, and the treadmill 200 is provided with a first trigger block 220. When the treadmill 200 is at the position with the minimum inclination angle, the first trigger block 220 triggers the first limit sensor 1221.

[0068] In an embodiment of the present invention, when the treadmill is at its minimum inclination, the first trigger block triggers the first limit sensor. The adjustment motor receives the signal from the first limit sensor, deactivating the adjustment motor and preventing the treadmill from further downward rotation. The first limit sensor, the first stop, and the second stop provide a dual limit for the treadmill's minimum inclination position, ensuring the reliability of the slope adjustment mechanism.

[0069] Furthermore, the first support mechanism 450 is fixedly connected to a first shaft sleeve 454 at one end close to the base 100, the base 100 is fixedly connected to a first support 130, the first support 130 is fixedly connected to the third rotating shaft 131, the first shaft sleeve 454 is rotatably connected to the third rotating shaft 131, the first shaft sleeve 454 is fixedly connected to a rotation limit block 4541, and the second support mechanism 550 is fixedly connected to a second shaft sleeve 560 at one end close to the base 100, the base 100 is fixedly connected to a second support 140, the second support 140 is fixedly connected to the fourth rotating shaft 141, and the second shaft sleeve 560 is rotatably connected to the fourth rotating shaft 141. When the treadmill 200 is in the position with the maximum inclination angle, the rotation limit block 4541 is stopped by the first support 130.

[0070] In an embodiment of the present invention, when the treadmill is in the position with the maximum inclination angle, the rotation limit block is stopped by the first support, and the treadmill cannot continue to rotate upward. The rotation limit block serves to limit the rotation range of the treadmill, thereby ensuring the reliability of the slope adjustment mechanism.

[0071] The first support mechanism is rotatably connected to the base through the rotatable connection between the first shaft sleeve and the third rotating shaft, thereby ensuring the reliability of the rotatable connection between the two.

[0072] The second support mechanism is rotatably connected to the base through the rotatable connection between the second shaft sleeve and the fourth rotating shaft, thereby ensuring the reliability of the rotatable connection between the two.

[0073] Furthermore, the base 100 is fixedly connected to a second limit sensor 150, which is electrically connected to the adjustment motor 300. The second limit sensor 150 is located on the movement path of the second connecting rod mechanism 540. When the treadmill 200 is at the position with the maximum inclination angle, the second connecting rod mechanism 540 triggers the second limit sensor 150.

[0074] In an embodiment of the present invention, when the treadmill is at its maximum inclination, the second linkage triggers the second limit sensor. The adjustment motor receives a signal from the second limit sensor, deactivating the adjustment motor and preventing further upward rotation of the treadmill. The second limit sensor and the rotation limit block provide a dual limit for the treadmill's maximum inclination, ensuring the reliability of the slope adjustment mechanism.

[0075] Furthermore, it also includes a pull rope displacement sensor, which includes a sensor body 610 and a pull rope. Either the sensor body 610 or the pull rope is fixedly connected to the base 100, and the other of the sensor body 610 and the pull rope is fixedly connected to the treadmill frame 200.

[0076] In an embodiment of the present invention, by setting up a pull-rope displacement sensor, during the slope adjustment process of the treadmill, the distance between the treadmill frame and the base will change, causing the length of the pull-rope pulled out of the sensor to change, thereby reflecting the corresponding slope of the treadmill, making it easier for the user to accurately adjust the slope of the treadmill. Figure 2 , the sensor body 610 is fixed on the base 100 , and the pulled-out end of the pull rope is fixed on the treadmill frame 200 . A fixing screw 620 can be provided on the treadmill frame 200 to fix the pulled-out end of the pull rope.

[0077] Furthermore, the first worm gear mechanism 410 includes a first worm 411, the first worm 411 is rotatably connected to the first fixed seat 430, the base 100 is fixedly connected to the first fixed plate 160, the first fixed seat 430 is detachably fixedly connected to the first fixed plate 160, the first fixed seat 430 is located on the side of the first fixed plate 160 facing away from the first connecting rod mechanism 440, the first telescopic screw 420 passes through the first fixed plate 160 and is rotatably connected to the first connecting rod mechanism 440, and the second worm gear mechanism 510 includes The second worm 511 is rotatably connected to the second fixed seat 530, the base 100 is fixedly connected to the second fixed plate 170, the second fixed seat 530 is detachably fixedly connected to the second fixed plate 170, the second fixed seat 530 is located on the side of the second fixed plate 170 facing away from the second connecting rod mechanism 540, the second telescopic screw 520 passes through the second fixed plate 170 and is rotatably connected to the second connecting rod mechanism 540, and the adjusting motor 300 drives the first worm 411 and the second worm 511 to rotate synchronously.

[0078] In an embodiment of the present invention, the first fixing seat is detachably fixedly connected to the first fixing plate. The detachable fixed connection between the first fixing seat and the first fixing plate can be achieved, but is not limited to, by a plurality of first bolts 431. The first fixing seat is located on the side of the first fixing plate facing away from the first connecting rod mechanism. During use of the treadmill, the treadmill frame applies downward pressure to the first connecting rod mechanism, the first connecting rod mechanism applies a pulling force to the first telescopic screw, the first telescopic screw applies a pulling force to the first fixing seat, and the first fixing seat applies a pushing force to the first fixing plate. This makes the first fixing seat and the first fixing plate the primary force bearers, rather than the first bolts. This makes the force applied to the first lifting assembly more reasonable, thereby improving the reliability of the slope adjustment mechanism.

[0079] The second fixing seat is detachably fixedly connected to the second fixing plate, and the detachable connection between the second fixing seat and the second fixing plate can be achieved, but is not limited to, by a plurality of second bolts 531. The second fixing seat is located on the side of the second fixing plate facing away from the second connecting rod mechanism. During use of the treadmill, the treadmill frame applies downward pressure to the second connecting rod mechanism, which in turn applies tension to the second telescopic screw, which in turn applies tension to the second fixing seat, which in turn applies thrust to the second fixing plate. This makes the second fixing seat and the second fixing plate, rather than the second bolts, the primary objects of force. This makes the force applied to the second lifting assembly more reasonable, thereby improving the reliability of the slope adjustment mechanism.

[0080] Furthermore, the side of the first fixing plate 160 facing the first linkage mechanism 440 is fixedly connected to the base 100 through multiple first ribs 161 , and the side of the second fixing plate 170 facing the second linkage mechanism 540 is fixedly connected to the base 100 through multiple second ribs 171 .

[0081] In the embodiment of the present invention, the first ribs reinforce the first fixing plate, ensuring the reliability of the fixed connection between the first fixing plate and the base. The second ribs reinforce the second fixing plate, ensuring the reliability of the fixed connection between the second fixing plate and the base.

[0082] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A treadmill slope adjustment mechanism, characterized in that: The treadmill slope adjustment mechanism includes: base; a treadmill frame, one end of which is rotatably connected to the base; an adjusting motor fixedly connected to the base; a first lifting assembly, comprising a first worm gear mechanism, a first telescopic screw, a first fixed seat, a first connecting rod mechanism, and a first supporting mechanism, wherein the first fixed seat is fixedly connected to the base, one end of the first connecting rod mechanism is rotatably connected to the first telescopic screw, the other end of the first connecting rod mechanism is rotatably connected to the first supporting mechanism, one end of the first supporting mechanism is rotatably connected to the base, the other end of the first supporting mechanism supports the treadmill, the first telescopic screw is slidably connected to the first fixed seat, and the first worm gear mechanism is connected to the first telescopic screw; and The second lifting assembly includes a second worm gear mechanism, a second telescopic screw, a second fixed seat, a second connecting rod mechanism and a second supporting mechanism, the second fixed seat is fixedly connected to the base, one end of the second connecting rod mechanism is rotatably connected to the second telescopic screw, the other end of the second connecting rod mechanism is rotatably connected to the second supporting mechanism, one end of the second supporting mechanism is rotatably connected to the base, the other end of the second supporting mechanism supports the treadmill, the second telescopic screw is slidably connected to the second fixed seat, and the second worm gear mechanism is connected to the second telescopic screw. The first lifting assembly and the second lifting assembly are symmetrically arranged, and the adjusting motor drives the first worm gear mechanism and the second worm gear mechanism to move synchronously, thereby driving the first telescopic screw and the second telescopic screw to extend and retract synchronously. The first supporting mechanism includes a first supporting roller, a second supporting roller and a third supporting roller arranged in sequence, and the second supporting mechanism includes a fourth supporting roller, a fifth supporting roller and a sixth supporting roller arranged in sequence, During the rotation of the treadmill, the second supporting roller and the fifth supporting roller are always in contact with the treadmill. When the treadmill is at the position with the smallest inclination angle, the first supporting roller, the second supporting roller, the fourth supporting roller and the fifth supporting roller respectively support the treadmill. When the treadmill frame is at the position with the largest inclination angle, the second supporting roller, the third supporting roller, the fifth supporting roller and the sixth supporting roller respectively support the treadmill frame.

2. The treadmill slope adjustment mechanism according to claim 1, characterized in that: The first supporting mechanism includes a first supporting tube and a first connecting member, wherein the first connecting member is fixedly connected to a side of the first supporting tube facing the first telescopic screw, and the first connecting member is rotatably connected to the first connecting rod mechanism. The second supporting mechanism includes a second supporting tube and a second connecting member, the second connecting member is fixedly connected to a side of the second supporting tube facing the second telescopic screw, and the second connecting member is rotatably connected to the second connecting rod mechanism.

3. The treadmill slope adjustment mechanism according to claim 2, characterized in that: The first connecting member includes a first U-shaped plate, the first U-shaped plate includes a first bottom plate, a first folded edge and a second folded edge, the first folded edge and the second folded edge are respectively fixedly connected to both sides of the first support tube, the first bottom plate abuts against the side of the first support tube facing the first telescopic screw, and the first U-shaped plate is fixedly connected to the side facing away from the first support tube with a first connecting plate and a second connecting plate spaced apart and oppositely arranged, and the first connecting plate and the second connecting plate are respectively rotatably connected to the first connecting rod mechanism. The second connecting member includes a second U-shaped plate, and the second U-shaped plate includes a second bottom plate, a third folded edge and a fourth folded edge. The third folded edge and the fourth folded edge are respectively fixedly connected to both sides of the second support tube, and the second bottom plate abuts against the side of the second support tube facing the second telescopic screw. The side of the second U-shaped plate facing away from the second support tube is fixedly connected with a third connecting plate and a fourth connecting plate arranged spaced apart and opposite to each other, and the third connecting plate and the fourth connecting plate are respectively rotatably connected to the second connecting rod mechanism.

4. The treadmill slope adjustment mechanism according to claim 3, characterized in that: The first connecting rod mechanism includes a first sub-connecting rod and a second sub-connecting rod, the first sub-connecting rod and the second sub-connecting rod are connected by a first synchronization plate, a first reinforcing plate is detachably fixedly connected to a side of the first connecting plate facing away from the second connecting plate, the first reinforcing plate and the first connecting plate are respectively fixedly connected to a first rotating shaft, the first sub-connecting rod is rotatably connected to the first rotating shaft, and the first sub-connecting rod portion is located between the first reinforcing plate and the first connecting plate. The second connecting plate is detachably fixedly connected to a second reinforcing plate on the side facing away from the first connecting plate. The second reinforcing plate and the second connecting plate are respectively fixedly connected to the second rotating shaft. The second sub-connecting rod is rotatably connected to the second rotating shaft. The second sub-connecting rod portion is located between the second reinforcing plate and the second connecting plate.

5. The treadmill slope adjustment mechanism according to claim 4, characterized in that: A first spacer block is provided between the first connecting plate and the first reinforcing plate, and a second spacer block is provided between the second connecting plate and the second reinforcing plate.

6. The treadmill slope adjustment mechanism according to claim 3, characterized in that: The second connecting rod mechanism includes a third sub-connecting rod and a fourth sub-connecting rod, the third sub-connecting rod and the fourth sub-connecting rod being connected via a second synchronizing plate, a third reinforcing plate being detachably fixedly connected to a side of the third connecting plate facing away from the fourth connecting plate, the third reinforcing plate and the third connecting plate being fixedly connected to a third rotating shaft respectively, the third sub-connecting rod being rotatably connected to the third rotating shaft, and the third sub-connecting rod portion being located between the third reinforcing plate and the third connecting plate, The fourth connecting plate is detachably fixedly connected to a fourth reinforcing plate on a side facing away from the third connecting plate. The fourth reinforcing plate and the fourth connecting plate are respectively fixedly connected to a fourth rotating shaft. The fourth sub-connecting rod is rotatably connected to the fourth rotating shaft. The fourth sub-connecting rod portion is located between the fourth reinforcing plate and the fourth connecting plate.

7. The treadmill slope adjustment mechanism according to claim 6, characterized in that: A third spacer block is provided between the third connecting plate and the third reinforcing plate, and a fourth spacer block is provided between the fourth connecting plate and the fourth reinforcing plate.

8. The treadmill slope adjustment mechanism according to claim 1, characterized in that: A first guide protrusion is fixedly connected to a side of the treadmill frame facing the first supporting mechanism, and the first supporting roller, the second supporting roller and the third supporting roller are respectively provided with a first guide groove that cooperates with the first guide protrusion. A second guide protrusion is fixedly connected to the side of the treadmill frame facing the second supporting mechanism, and the fourth supporting roller, the fifth supporting roller and the sixth supporting roller are respectively provided with a second guide groove that cooperates with the second guide protrusion.

9. The treadmill slope adjustment mechanism according to claim 1, characterized in that: The base is detachably fixedly connected to a first crossbar and a second crossbar, the first crossbar is parallel to the second crossbar, the first crossbar is located below the first support mechanism, and a first avoidance groove is provided on the portion of the first crossbar located on the movement path of the first support mechanism. The second cross bar is located below the second supporting mechanism, and a second avoidance groove is provided on the portion of the second cross bar located on the movement path of the second supporting mechanism.

10. The treadmill slope adjustment mechanism according to claim 9, characterized in that: A first stopper is fixedly connected to a side of the first crossbar facing the treadmill, and a second stopper is fixedly connected to a side of the second crossbar facing the treadmill. The first stopper and the second stopper are respectively located on the motion path of the treadmill. When the treadmill frame is at a position with a minimum inclination angle, the first stopper and the second stopper respectively support the treadmill frame.

11. The treadmill slope adjustment mechanism according to claim 10, characterized in that: The second stopper is fixedly connected to a first limit sensor, the first limit sensor is electrically connected to the adjustment motor, and the treadmill is provided with a first trigger block. When the treadmill is at the position with the minimum inclination angle, the first trigger block triggers the first limit sensor.

12. The treadmill slope adjustment mechanism according to claim 1, characterized in that: The first support mechanism is fixedly connected to a first sleeve at one end close to the base, the base is fixedly connected to a first support, the first support is fixedly connected to a third rotating shaft, the first sleeve is rotatably connected to the third rotating shaft, and the first sleeve is fixedly connected to a rotation limit block. The second support mechanism is fixedly connected to a second shaft sleeve at one end close to the base, the base is fixedly connected to a second support, the second support is fixedly connected to a fourth rotating shaft, and the second shaft sleeve is rotatably connected to the fourth rotating shaft. When the treadmill frame is at the position with the maximum inclination angle, the rotation limit block is stopped by the first support.

13. The treadmill slope adjustment mechanism according to claim 1, characterized in that: The base is fixedly connected to a second limit sensor, the second limit sensor is electrically connected to the adjustment motor, and the second limit sensor is located on the motion path of the second link mechanism. When the treadmill frame is at the position with the maximum inclination angle, the second connecting rod mechanism triggers the second limit sensor.

14. The treadmill slope adjustment mechanism according to claim 1, characterized in that: It also includes a pull rope displacement sensor, which includes a sensor body and a pull rope. Either the sensor body or the pull rope is fixedly connected to the base, and the other one is fixedly connected to the treadmill.

15. The treadmill slope adjustment mechanism according to claim 1, characterized in that: The first worm gear mechanism includes a first worm, the first worm is rotatably connected to the first fixing seat, the base is fixedly connected to a first fixing plate, the first fixing seat is detachably fixedly connected to the first fixing plate, the first fixing seat is located on a side of the first fixing plate facing away from the first connecting rod mechanism, and the first telescopic screw passes through the first fixing plate and is rotatably connected to the first connecting rod mechanism. The second worm gear mechanism includes a second worm, the second worm is rotatably connected to the second fixed seat, the base is fixedly connected to a second fixed plate, the second fixed seat is detachably fixedly connected to the second fixed plate, the second fixed seat is located on a side of the second fixed plate facing away from the second connecting rod mechanism, and the second telescopic screw passes through the second fixed plate and is rotatably connected to the second connecting rod mechanism. The adjusting motor drives the first worm and the second worm to rotate synchronously.

16. The treadmill slope adjustment mechanism according to claim 15, characterized in that: The side of the first fixing plate facing the first link mechanism is fixedly connected to the base through a plurality of first ribs. A side of the second fixing plate facing the second link mechanism is fixedly connected to the base via a plurality of second ribs.

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