CN204932726U - sports equipment - Google Patents

Abstract

The utility model provides a sports device, which comprises a framework, two pedals, two swing pipes, two pedal pipes, a resistance device, two linkage pipes, two cranks, two sliding pipes and a stride adjusting device. Each swing pipe is provided with two ends, one end of each swing pipe is pivoted with the framework, the other end of each swing pipe is pivoted with one end of the corresponding pedal pipe, and the other end of the corresponding pedal pipe is connected with the corresponding pedal. The resistance device has an axis. One end of each crank is connected with the axle center, the other end of each crank is connected with one end of the corresponding connecting pipe, and the other end of each connecting pipe is pivoted with the area of the pedal pipe. Each pedal is slidably connected to a corresponding sliding tube, and one end of the sliding tube is movably connected to the stride adjustment device.

Description

sports equipment

technical field

The utility model relates to a sports device, in particular to a stepper.

Background technique

A stepper is a piece of exercise equipment that increases your heart rate, burns calories, and improves heart muscle endurance.

In the traditional stepper design, the user stands on two pedals with predetermined resistance, and the two pedals are lifted alternately by applying force with both feet. The movement of the steps is like continuously going up the stairs, thereby exercising the muscles of the legs and buttocks. Compared with treadmills, steppers have less impact on the legs, but care must be taken when using them to avoid knee injuries.

FIG. 1A and FIG. 1B show the structures of two traditional steppers and the movement tracks of their pedals. Fig. 1A is a structure of fixed-axis single-link, and Fig. 1B is a structure of fixed-axis double-link. The pedal 20 is fixed to the connecting rod 22, and one end of the connecting rod 22 is connected to the shaft 21, so that the trajectory P of the pedal is an outer arc, and its center points away from the user. This kind of trajectory does not conform to ergonomics and cannot simulate actual stepping, Stepping, or climbing.

US Patent No. US20120077645 discloses a stepper, wherein a crankarm (crankarm) exerts force on a swing tube (linking units), so that a connecting rod (pedallink) connected to the swing tube moves forward and backward. The connecting rod has a rollable anti-friction member pivotally connected with a pedal. When the connecting rod moves forward, the pedal is driven by the roller to move obliquely forward and upward along the climbing rod (ramprod). In the above-mentioned structure, the thrust of the pedals rising is insufficient, and it is difficult to simulate actual stepping, striding, or mountain climbing.

About the stepper of prior art, also can refer to Taiwan patent I458519, be entitled " adjustable stepper ", and Taiwan patent I442955, be entitled " stepper " and other patent applications.

The conventional steppers cannot overcome the problem of "dead point". "Dead point" means that in the connecting rod mechanism, when the crank and the connecting rod are in a straight line, the crank cannot be pushed to rotate.

In addition, the conventional steppers cannot adjust the stride size for different users.

Contents of the invention

The purpose of this utility model is to overcome the defects existing in existing steppers, and to provide a movement device, especially a stepper. The technical problem to be solved is that in the connecting rod mechanism, when the crank and the connecting rod are in a straight line, , can push the crank to rotate, and can adjust the size of the stride for different users.

One embodiment of the utility model provides a sports device, which includes a skeleton, two swing tubes, two pedal tubes, two pedals, a resistance device, two cranks, two linkage tubes, two sliding tubes, and Stride adjustment device. The two oscillating tubes are respectively located on the left and right sides of the frame, and one end of each oscillating tube is pivotally connected to the frame. The two pedal tubes are connected to the two swing tubes, and one end of each of the pedal tubes is pivotally connected to the other end of the corresponding swing tube. The two pedals are connected to the two pedal tubes, and each pedal is connected to the other end of the corresponding pedal tube. The resistance device is arranged on the frame, has an axis, and provides operation resistance. The two cranks are respectively located on both sides of the resistance device, and one end of each crank is connected to the shaft. The two linkage tubes are connected to the two cranks and the two pedal tubes, one end of each linkage tube is connected to the other end of the corresponding crank, and the other end of each linkage tube is connected to the area of the corresponding pedal tube Pivot. One end of each sliding tube is pivotally connected to the frame, and the two pedals are slidably connected to the two sliding tubes. The stride adjusting device is arranged on the frame and is movably connected to the other end of each sliding tube.

In one embodiment, the stride adjustment device includes a motor, a screw, and a sleeve, the sleeve has an internal thread engaging the screw, and the motor can drive the screw to rotate so that the sleeve moves toward or away from the motor along the screw. direction to move.

In one embodiment, the framework includes a base and a main frame, the base is located above the supporting surface or the ground, and the main frame is located above the base.

In one embodiment, one end of the motor is pivotally connected to the main frame of the skeleton, one end of the sleeve is connected to the cross bar, and one end of the two linkage tubes is connected to the cross bar.

In one embodiment, the motion device further includes a first connecting rod, two second connecting rods, and a cross bar, one end of the motor is pivotally connected to the base of the frame, and the first end of the first connecting rod is pivotally connected to the main frame, the second end of the first connecting rod is pivotally connected to the bushing, the two second connecting rods are located on both sides of the first connecting rod, and the first end of each second connecting rod is connected to the The portion between the two ends of the first connecting rod is pivotally connected, the second end of each second connecting rod is pivotally connected to the cross bar, the first end of each sliding tube is connected to the cross bar, and each of the sliding tubes is connected to the cross bar. The base of the second end of the pivot frame.

In one embodiment, the moving device further includes a sliding seat, a sliding rail, and two collars, one end of the motor is pivotally connected to the base of the frame, the sleeve is pivotally connected to the sliding seat, and the sliding rail is arranged on the The base, the slide seat is arranged on the slide rail and can slide on the slide rail, the two collars are connected to the slide seat and are respectively located at the left and right ends of the slide seat, and the first end of each slide tube pivots Connected to the main frame, the second end of each of the sliding tubes passes through a corresponding collar.

In one embodiment, the moving device further includes a sliding seat and two collars, one end of the motor is pivotally connected to the base of the framework, the sleeve is pivotally connected to the sliding seat, and the sliding seat is arranged on the base and can slide on the slide rail, the two collars are connected to the slide seat and are respectively located at the left and right ends of the slide seat, the first end of each slide tube is pivotally connected to the main frame, and the first end of each slide tube The two ends pass through a corresponding collar.

In one embodiment, each of the sliding tubes is in the shape of an arc, and the direction of its center points to the user's site.

In one embodiment, the larger the angle between the two sliding tubes and the vertical direction, the smaller the stride of the two pedals.

In one embodiment, the smaller the angle between the two sliding tubes and the vertical direction, the larger the stride of the two pedals.

In one embodiment, each of the pedals has an inclination angle, and the inclination angle when the pedal moves to a low point is smaller than the inclination angle when the pedal moves to a high point.

In one embodiment, the moving device further includes two pressing wheel sets, each of the pressing wheel sets is connected to one pedal tube, and can reciprocate on the corresponding sliding tube.

In one embodiment, each of the pressing wheel sets includes a front wheel, a fixing mechanism, and a rear wheel, and the front wheel and the rear wheel are respectively located at the front and rear of the sliding tube and pivotally connected with the fixing mechanism.

In one embodiment, the front wheel and the rear wheel have a groove matching the shape of the sliding tube, so that the front wheel and the rear wheel are close to the sliding tube.

With the above-mentioned technical solution, the utility model has at least the following advantages: in the linkage mechanism, when the crank and the connecting rod are in a straight line, the crank can be pushed to rotate, and at the same time, the size of the stride can be adjusted for different users, and the Simulate actual stepping, striding, or climbing.

The above description is only an overview of the technical solution of the utility model. In order to better understand the technical means of the utility model, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1A and Fig. 1 B show the structure of existing conventional stepper and the motion track of its pedal.

Fig. 2 is a perspective view showing the exercise device according to the first (preferred) embodiment of the present invention.

Fig. 3 is a partial perspective view showing a sports device according to a preferred embodiment of the present invention.

FIG. 4 is a side view showing the operation of the exercise device of FIG. 2 .

FIG. 5 is a perspective view showing the operation of the exercise device of FIG. 2 .

FIG. 6 is a side view showing the operation of the exercise device of FIG. 2 .

FIG. 7 is a side view showing the operation of the exercise device of FIG. 2 .

Fig. 8 is a partial perspective view showing the exercise device according to the second embodiment of the present invention.

Fig. 9 is a side view showing the exercise device according to the second embodiment of the present invention.

Fig. 10 is a side view showing the exercise device according to the second embodiment of the present invention.

Fig. 11 is a partial perspective view showing a sports device according to a third embodiment of the present invention.

Fig. 12 is a side view showing the exercise device according to the third embodiment of the present invention.

Fig. 13 is a side view showing a sports device according to a third embodiment of the present invention.

[Description of main component symbols]

1: Sports device 2: Sports device

3: Movement device 10: Skeleton

11: swing tube 12: pedal tube

13: resistance device 14: crank

15: linkage tube 16: sliding tube

17: Pedal 18: Stride adjustment device

19: Pressing wheel set 20: Pedal

21: Shaft 22: Connecting rod

23: Operation interface 101: Base

102: main frame 103: riser

130: Shaft 132: Pulley

134: flywheel 181: motor

182: Screw 183: Sleeve

190: front wheel 192: rear wheel

194: Fixing mechanism 1012: Shaft

1013: shaft 1021: first connecting rod

1022: Second connecting rod 1023: Cross bar

1024: shaft 1026: slide rail

1027: sliding seat 1028: collar

L1: stride length L2: stride length

L3: stride length L4: stride length

L5: stride length L6: stride length

P: motion track P1: motion track

P2: Motion track P3: Motion track

θ1: included angle θ2: included angle

θ3: included angle θ4: included angle

θ5: included angle θ6: included angle

detailed description

Various embodiments of the present application will be described in detail below, and the accompanying drawings are used as examples. In some embodiments, the examples shown in the figures may be to scale, but in other embodiments, not necessarily to scale. In some embodiments, the same or similar reference numerals may represent the same, similar, or analogous elements and/or elements, but in some embodiments, may also represent different elements. In some embodiments, nouns describing directions, such as up, down, left, right, up, down, over, above, below, behind, in front, etc., can be interpreted literally, but in other embodiments, also Can not be interpreted literally. In addition, in order to clearly show certain elements of the present invention, some elements may be omitted in the drawings. In the description of the specification, many specific details are provided in order to enable readers to have a more complete understanding of the utility model; however, the utility model may still be implemented under the premise of omitting some or all of these specific details.

Fig. 2 is a three-dimensional view, and Fig. 3 is a partial three-dimensional enlarged view, showing the first embodiment of the utility model, which is also a sports device 1 of a preferred embodiment, and its main components include a skeleton 10, two swinging tubes 11, and two pedal tubes 12, resistance device 13, two cranks 14, two interlocking pipes 15, two sliding pipes 16, two pedals 17, stride adjustment device 18.

Referring to FIG. 2 and FIG. 3 , the two swing tubes 11 and the two pedal tubes 12 are respectively located on the left and right sides of the frame 10 . Each swing tube 11 and pedal tube 12 has a first end and a second end. The first end of each swing tube 11 is pivotally connected to the skeleton 10, the second end of each swing tube 11 is pivotally connected to the first end of the corresponding pedal tube 12, and the second end of the corresponding pedal tube 12 is connected to the corresponding pedal 17. In this embodiment, the framework 10 includes, but is not limited to, a base 101 and a main frame 102 . The base 101 is located on the supporting surface or the ground, and the main frame 102 is located above the base 101 . As an illustration and not a limitation, there is a standpipe 103 above the main frame 102 , and one end of the standpipe 103 is connected to the main frame 102 , and the other end has an operation interface 23 for the user to operate or control.

Referring to FIG. 2 and FIG. 3 , the above two cranks 14 are respectively located on both sides of the resistance device 13 . The resistance device has an axis 130, and each crank 14 and each linkage tube 15 has a first end and a second end. The first end of each crank 14 is connected to the shaft center 130, and the second end is pivotally connected to the first end of the corresponding linkage tube 15, and the second end of the linkage tube 15 can be connected to or between the two ends of the corresponding pedal tube 12. The middle part is pivoted or connected. The above two sliding tubes 16 each have a first end and a second end. The first end of each sliding tube 16 is movably connected to the stride adjustment device 18 , and the second end is pivotally connected to the frame 10 , for example, to the base 101 of the frame 10 . The stride adjustment device 18 can change the angle of the sliding tube 16 to the vertical, which will be described in detail later.

2 and 3, when the user's feet stand on the left and right pedals 17, the resistance device 13 provides resistance to the user. The resistance value can be controlled through the operation interface 23 above the skeleton 10 . In this preferred embodiment, the resistance device 13 may include, but not limited to, a pulley 132 and a flywheel 134 . The shaft 130 of the pulley 132 may have a two-way bearing (not shown) connecting the first ends of the two cranks 130 . The user's pedaling operation drives the pulley 132 via the crank 14 , and the pulley 132 can drive the flywheel 134 to rotate.

With reference to Fig. 2 and Fig. 3, in this preferred embodiment, sports device 1 also comprises two crushing wheel sets 19, and each crushing wheel set 19 comprises front wheel 190 and rear wheel 192 respectively, wherein the center of rear wheel 192 The shaft is connected to a pedal tube 12. The front wheel 190 and the rear wheel 192 can be respectively located at the front and rear of the sliding tube 16 , and the front wheel 190 and the rear wheel 192 have grooves matching the shape of the sliding tube 16 , so that the front wheel 190 and the rear wheel 192 are close to the sliding tube 16 . Each pressing wheel set 19 may also include a fixing mechanism 194 for fixing the positions of the front wheel 190 and the rear wheel 192 . Wherein, the fixing mechanism 194 can be a connecting piece, the front wheel 190 is pivotally connected to the fixing mechanism 194 , the rear wheel 192 is pivotally connected to the pedal tube 12 , and the size of the rear wheel 192 can be larger than that of the front wheel 190 . With the above structure, the pedal 17 is restricted to move between the upper end and the lower end along the arc shape of the sliding tube 16 . Fig. 4 shows the movement track P1 of the pressing wheel set 19, and drives the pedal 17 to make an arc-shaped movement track P2. Wherein, when the pedal 17 moves to a low point, its angle is slightly forward or close to the level; discomfort. In addition, each of the crimping wheel sets 19 can change the angle of inclination along with the arc shape of the sliding tube 16. When the crimping wheel sets 19 move to a high point, the crimping wheel sets 19 are relatively horizontal; To the lowest point, the pressing wheel set 19 is relatively inclined. In this way, the pressing wheel set 19 can be in close contact with the sliding tube 16 . According to the pressing wheel set 19 of the preferred embodiment of the present invention, the stability when the pedal 17 moves can be improved. When the speed of the pedal 17 increases, it will not break away from the sliding tube 16.

As shown in FIG. 4 , when the exercise device 1 is in operation, the swing tube 11 and the linkage tube 15 drive the pedal tube 12 to move along the reciprocating track P3. As shown in FIG. 4 , according to the exercise device of the preferred embodiment of the present invention, the trajectory P2 of the left and right pedals 17 is an arc respectively, and the center of the circle roughly points to a certain part of the user, such as the calf or the foot. The movement trajectory of the pedals of the exercise device in the prior art is not ergonomic; however, the movement trajectory of the pedal 17 of the exercise device 1 in this case is ergonomic. In addition, since the crank 14 directly applies force to the pedal tube 12, the defect of insufficient upward thrust of the pedal in the prior art can be improved, and the ergonomic pedal motion trajectory P2 can be used to make it compatible with actual stepping, striding, or mountaineering. movement close. In addition, the pedal movement trajectory P2 of the exercise device 1 in this case is very smooth, which can improve the comfort of use and eliminate "stuck". The so-called "pause" refers to the stagnation felt by the user when stepping on it.

FIG. 5 is a perspective view showing the operation of the pedals 17 of the exercise device 1 of FIG. 2 . As shown in Figure 5, when the crank 14 overlaps with the interlocking tube 15, the left and right pedals 17 are not at the top and bottom positions, and the left and right pedals 17 can continue to be actuated by force, avoiding the problems caused by the existing conventional kinematic devices. Defects that produce "dead spots".

Fig. 6 and Fig. 7 are side views showing the sports device 1 according to the preferred embodiment of Fig. 2 of the present invention. Referring to Fig. 2, Fig. 3, Fig. 6 and Fig. 7, one end of the stride adjustment device 18 is pivotally connected to the frame 10, such as the shaft 1012 (Fig. 2) pivotally connected to the base 101, and the other end of the stride adjustment device 18 The slide tube 16 is movably connected. For example, the stride adjustment device 18 may include a motor 181 , a screw 182 , and a sleeve 183 . The motor 181 can drive the screw rod 182 to rotate, and the sleeve 183 has an internal thread to engage the screw rod 182. When the motor 181 drives the screw rod 182 to rotate clockwise or counterclockwise, the sleeve 183 is displaced along the screw rod 182 towards the motor 181 or away from the motor 181. . In addition, the motion device 1 can be movably connected to one end of the sliding tube 16 through a connecting rod set, for example, a first connecting rod 1021 , two second connecting rods 1022 , and a cross bar 1023 . Wherein, the first end of the first connecting rod 1021 is pivotally connected to the main frame 102 of the framework 10 , and the second end of the first connecting rod 1021 is pivotally connected to the bushing 183 . Two second connecting rods 1022 are located on both sides of the first connecting rod 1021, and the first end of each second connecting rod 1022 is pivotally connected with the position between the two ends of the first connecting rod 1021, and each second connecting rod 1022 The second end of the cross bar 1023 is pivotally connected. A first end of each sliding tube 16 is connected to the crossbar 1023 , and a second end of each sliding tube 16 is pivotally connected to the base 101 of the framework 10 . As shown in Figure 6, when the motor 181 drives the screw 182 so that the sleeve 183 moves away from the motor 181 along the screw 182, the angle between the sliding tube 16 and the vertical direction is θ1. The width L1, that is, the distance between the left and right pedals 17 is the largest. As shown in FIG. 7 , when the motor 181 drives the screw 182 so that the sleeve 183 moves along the screw 182 towards the direction of the motor 181 , the sleeve 183 is dragged by the first connecting rod 1021 , the second connecting rod 1022 , and the cross bar 1023 . Slide the tube 16 so that the included angle between the slide tube 16 and the vertical direction is changed to θ2, wherein θ2 is greater than θ1. In this state, the user's stride length L2 is the smallest. The user can control the stride adjustment device 18 through the operation interface 23 to adjust to an appropriate stride; for example, an appropriate stride can be obtained by adjusting the angle between the sliding tube 16 and the vertical direction between θ1 and θ2 .

Those skilled in the art can make appropriate modifications, changes, or replacements according to the above-mentioned embodiments, and these modifications, changes, or replacements all belong to the scope of the present utility model. For example, in other embodiments of the present invention, the included angle between the sliding tube 16 and the vertical direction may be between 10° and 60°. For example, in other embodiments of the present invention, the stride adjusting device 18 can be pivotally connected to other parts of the frame 10 , such as the main frame 102 . For example, the stride adjustment device 18 may directly connect the sliding tube 16 through the cross bar 1023 instead of the connecting rod set (such as the first connecting rod 1021 and the second connecting rod 1022 ). For example, in other embodiments of the present application, the stride adjusting device 18 is movably connected (directly or indirectly) to the other end of the sliding tube 16, ie the lower end.

Fig. 8 is a partial perspective view, Fig. 9 and Fig. 10 are side views, showing the exercise device 2 according to the second embodiment of the present invention.

Referring to FIG. 8 , the main difference between the exercise device 2 and the exercise device 1 lies in the connection relationship between the stride adjustment device 18 and the sliding tube 16 . In this embodiment, one end of the stride adjusting device 18 is pivotally connected to the frame 10 , for example, pivotally connected to the shaft 1024 of the main frame 102 of the frame 10 , and the other end of the stride adjusting device 18 is movably connected to the sliding tube 16 . The stride adjustment device 18 may include the aforementioned motor 181 , screw rod 182 , and sleeve 183 . In addition, the stride adjustment device 18 can be movably connected to one end of the sliding tube 16 through a cross bar 1023 . For example, the sleeve 183 is connected to the cross bar 1023 , the first end of each sliding tube 16 is connected to the cross bar 1023 , and the second end of each sliding tube 16 is pivotally connected to the base 101 of the framework 10 . It should be noted that, in another embodiment, one end of the stride adjusting device 18 may be pivotally connected to the base 101 of the frame 10 instead of being pivotally connected to the main frame 102 .

As shown in Figure 9, when the motor 181 drives the screw 182 so that the sleeve 183 moves away from the motor 181 along the screw 182, the angle between the sliding tube 16 and the vertical direction is θ3. The width L3, that is, the distance between the left and right pedals 17 is the largest. As shown in Figure 10, when the motor 181 drives the screw 182, so that the sleeve 183 moves along the screw 182 toward the direction close to the motor 181, the sleeve 183 drags the sliding tube 16 through the cross bar 1023, so that the sliding tube 16 is clamped with the vertical direction. The angle is changed to θ4, where θ4 is greater than θ3. In this state, the user's stride length L4 is the smallest. The user can control the stride adjustment device 18 through the operation interface 23 to adjust to an appropriate stride; for example, the angle between the sliding tube 16 and the vertical direction can be adjusted between θ3 and θ4 to obtain an appropriate stride.

Fig. 11 is a partial perspective view, and Fig. 12 and Fig. 13 are side views, showing a sports device 3 according to a third embodiment of the present invention.

Referring to FIG. 11 , the main difference between the exercise device 3 and the exercise device 1 lies in the connection relationship between the stride adjustment device 18 and the sliding tube 16 . In this embodiment, one end of the stride adjusting device 18 is pivotally connected to the frame 10, for example, pivotally connected to the shaft 1013 of the base 101 of the frame 10, and the other end of the stride adjusting device 18 is movably connected to the sliding tube 16, for example , movably connected to the lower end of the sliding tube 16. The stride adjustment device 18 may include the aforementioned motor 181 , screw rod 182 , and sleeve 183 . For example, the stride adjustment device 18 can be movably connected to one end of the sliding tube 16 through the sliding seat 1027 . For example, the sleeve 183 of the stride adjustment device 18 can be pivotally connected to the sliding seat 1027 , the sliding rail 1026 is disposed on the base 101 , and the sliding seat 1027 is disposed on the sliding rail 1026 and can slide on the sliding rail 1026 . The left and right ends of the sliding seat 1027 are respectively connected to collars 1028 , the first end of each sliding tube 16 is pivotally connected to the main frame 102 , and the second end of each sliding tube 16 passes through the corresponding collar 1028 . Thereby, the stride adjusting device 18 can control the movement of the second end (lower end) of the sliding tube 16 .

As shown in Figure 12, when the motor 181 drives the screw 182 so that the sleeve 183 moves away from the motor 181 along the screw 182, the angle between the sliding tube 16 and the vertical direction is θ5. The width L5, that is, the distance between the left and right pedals 17 is the largest. As shown in Figure 13, when the motor 181 drives the screw rod 182, so that the sleeve 183 moves along the screw rod 182 toward the direction close to the motor 181, the sleeve 183 drags the lower end of the sliding tube 16 through the sliding seat 1027, so that the sliding tube 16 is aligned with the vertical direction. The included angle of is changed to θ6, where θ6 is smaller than θ5. In this state, the user's stride length L6 is the smallest. The user can control the stride adjustment device 18 through the operation interface 23 to adjust to an appropriate stride; for example, the angle between the sliding tube 16 and the vertical direction can be adjusted between θ5 and θ6 to obtain an appropriate stride.

It should be noted that, in another embodiment of the present invention, the sliding rail 1026 is omitted, and the sliding seat 1027 is directly provided on the base 101 and can slide on the base 101 . The rest of the details are the same as those of the third embodiment and will not be repeated here.

Thereby, the stride adjustment device 18 of the exercise device 1/2/3 of the present invention can obtain an appropriate stride by adjusting the position of one end of the sliding tube 16 .

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above with the preferred embodiment, it is not used to limit the utility model. Anyone familiar with this field Within the scope of the technical solution of the utility model, those skilled in the art may use the technical contents disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but any content that does not depart from the technical solution of the utility model shall be based Technical Essence of the Utility Model Any simple modifications, equivalent changes and modifications made to the above embodiments still belong to the scope of the technical solution of the utility model.

Claims (12)

1. A sports device, characterized in that it comprises: skeleton; Two swing tubes are respectively located on the left and right sides of the framework, and one end of each swing tube is pivotally connected to the framework; Two pedal tubes are connected to the two swing tubes, and one end of each pedal tube is pivotally connected to the other end of the corresponding swing tube; Two pedals are connected to the two pedal tubes, and each pedal is connected to the other end of the corresponding pedal tube; The resistance device is arranged on the skeleton, has an axis, and provides operation resistance; Two cranks are respectively located on both sides of the resistance device, and one end of each crank is connected to the axis; Two linkage tubes, connecting the two cranks and the two pedal tubes, one end of each linkage tube is connected to the other end of the corresponding crank, and the other end of each linkage tube is connected to the area of the corresponding pedal tube Pivot; Two sliding tubes, one end of each of the sliding tubes is pivotally connected to the frame, and the two pedals are slidably connected to the two sliding tubes; The stride adjustment device is arranged on the frame and is dynamically connected with the other end of each sliding tube. 2. The exercise device according to claim 1, wherein the stride adjustment device comprises a motor, a screw, and a sleeve, the sleeve has internal threads to engage the screw, and the motor is used to drive the screw to rotate, The sleeve is made to move toward or away from the motor along the screw rod. 3 . The sports device according to claim 2 , wherein the framework comprises a base and a main frame, the base is located above a supporting surface or the ground, and the main frame is located above the base. 4 . 4. The exercise device according to claim 3, wherein one end of the motor is pivotally connected to the main frame of the frame, one end of the sleeve is connected to the cross bar, and one end of the two linkage tubes is connected to the cross bar. pole. 5. The exercise device according to claim 3, characterized in that: it also comprises a first connecting rod, two second connecting rods, and a cross bar, one end of the motor is pivotally connected to the base of the frame, and the first connecting rod The first end of a connecting rod is pivotally connected to the main frame, the second end of the first connecting rod is pivotally connected to the sleeve, and the two second connecting rods are located on both sides of the first connecting rod, each of the second The first end of the connecting rod is pivotally connected to the position between the two ends of the first connecting rod, the second end of each second connecting rod is pivotally connected to the cross bar, and the first end of each sliding tube is connected to the A cross bar, the second end of each of the sliding tubes is pivotally connected to the base of the frame. 6. The motion device according to claim 3, characterized in that: it also includes a slide seat, a slide rail, and two collars, one end of the motor is pivotally connected to the base of the frame, and the sleeve is pivotally connected to the slide seat, the slide rail is arranged on the base, the slide seat is arranged on the slide rail and can slide on the slide rail, the two collars are connected to the slide seat and are respectively located at the left and right ends of the slide seat, each The first end of the sliding tube is pivotally connected to the main frame, and the second end of each sliding tube passes through a corresponding collar. 7. The motion device according to claim 6, further comprising a sliding seat and two collars, one end of the motor is pivotally connected to the base of the frame, the sleeve is pivotally connected to the sliding seat, the The sliding seat is arranged on the base and can slide on the sliding rail. The two collars are connected to the sliding seat and are respectively located at the left and right ends of the sliding seat. The first end of each sliding tube is pivotally connected to the main frame , the second end of each of the sliding tubes passes through a corresponding collar. 8 . The exercise device according to claim 1 , wherein each of the sliding tubes is in the shape of an arc, and the direction of the center of the circle points to the user's part. 9 . 9. The exercise device according to claim 1, wherein the larger the angle between the two sliding tubes and the vertical direction, the smaller the stride of the two pedals. 10. The exercise device according to claim 1, wherein the smaller the angle between the two sliding tubes and the vertical direction, the smaller the stride of the two pedals. 11. The exercise device according to claim 1, wherein each of the pedals has an inclination angle, and the angle of the inclination angle when the pedal moves to a low point is smaller than the inclination when the pedal moves to a high point The angle of the corner. 12. The exercise device according to claim 1, characterized in that it further comprises two pressing wheel sets, each of the pressing wheel sets is connected to one of the pedal tubes, and can reciprocate on the corresponding sliding tube Movement, wherein each of the pressing wheel sets includes a front wheel, a fixing mechanism, and a rear wheel, and the front wheel and the rear wheel are respectively located at the front and rear of the sliding tube and are pivotally connected with the fixing mechanism.