Elliptical machine with step electric adjustment structure

Abstract

This utility model discloses an elliptical machine with an electrically adjustable step size structure, including a frame. A wheel unit is located at the front end of the frame, and four-bar linkages are located on both sides of the frame. The four-bar linkages are connected to the frame and the wheel unit, respectively. Stepping on the four-bar linkages causes them to reciprocate, rotating the wheel unit. An electrically adjustable mechanism for adjusting the step size is provided on the four-bar linkages. This mechanism causes the four-bar linkages to slide, changing the internal angle and thus adjusting the step size. This utility model has a reasonable structural design. The electrically adjustable mechanism on the four-bar linkages, through the output end of the lifting motor, pushes a slider assembly to slide on a sliding rod. The slider assembly simultaneously moves the fourth linkage, changing the internal angle of the four-bar linkages and thus adjusting the step size. The electrically adjustable mechanism improves the convenience of step size adjustment and reduces potential risks to the user during adjustment.

Description

Technical Field

[0001] This utility model relates to the field of elliptical machines, and in particular to an elliptical machine with an electric step adjustment structure. Background Technology

[0002] Elliptical trainers are a popular indoor fitness equipment. Their movement trajectory is similar to "space walking." They are designed to exercise the arms and legs by driving resistance and stepping trajectory. Due to the automatic movement of elliptical trainers, the "four-bar linkage" structure allows the knee joints to not bear the force when the exerciser is stepping, which can effectively reduce the impact and protect the knees.

[0003] The distance and angle between the pedals and the linkage of an elliptical trainer determine the overall pedaling trajectory. Adjusting the stride length allows users of different body types and heights to find a more comfortable pedaling angle and adjust the initial pedaling position for better exercise. However, due to the limitations of the four-bar linkage design, the adjustable angle of the stride length on an elliptical trainer is often very limited. Existing methods for adjusting the stride length usually require manual adjustment, such as manually adjusting the linkage length, but this process is inconvenient and poses potential risks to the user. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an elliptical machine with an electric step adjustment structure, in light of the current state of the technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an elliptical machine with an electric step adjustment structure, including a frame, a wheel unit at the front end of the frame, and four-bar linkages on both sides of the frame. The four-bar linkages are connected to the frame and the wheel unit respectively. Stepping on the four-bar linkages causes them to reciprocate back and forth, and the four-bar linkages drive the wheel unit to rotate. The four-bar linkages are provided with an electric adjustment structure for adjusting the step size. The electric adjustment structure drives the four-bar linkages to slide, changing the internal angle of the four-bar linkages to adjust the step size.

[0006] Preferably, the four-bar linkage extends a sliding rod that cooperates with the electric adjustment structure. The electric adjustment structure includes a lifting motor mounted on the four-bar linkage and a slider assembly that slides in cooperation with the lifting motor. One end of the slider assembly is slidably mounted on the sliding rod, and the other end of the slider assembly is movably connected to the four-bar linkage.

[0007] Preferably, the lifting motor is provided with an output end, which is connected to the slider assembly. The lifting motor drives the output end to rise and fall, and the output end pushes the end of the slider assembly to slide along the sliding rod. The other end of the slider assembly drives the four-bar linkage to move, and the internal angle of the four-bar linkage changes.

[0008] Preferably, the frame includes a central support, a front support, and a rear support. The rear support is fixedly connected to the bottom of the central support, the front support is fixedly connected to the top of the central support, the front end of the rear support is connected to the middle of the front support, a fixed platform is fixedly connected to the top of the front support, a front mounting seat is fixedly connected to the front end of the top of the front support, a wheel unit is disposed on the front mounting seat, and a sliding rod is fixedly disposed on the outside of the wheel unit.

[0009] Preferably, the wheel unit includes a speed ratio wheel, a drive wheel, an inertia wheel, and a small wheel. The drive wheel is located on one side of the front mounting base and is arranged between the speed ratio wheel and the inertia wheel. The small wheel is arranged between the speed ratio wheel and the drive wheel. One end of the speed ratio wheel is connected to the inertia wheel via a first belt, and the other end of the speed ratio wheel is connected to the drive wheel via a second belt. The second belt passes around the small wheel near the middle.

[0010] Preferably, a first speed-distributing wheel is connected to the outer side of the drive wheel, and a second speed-distributing wheel is connected to the side of the front mounting base away from the first speed-distributing wheel. The four-bar linkage units on both sides of the frame are respectively connected to the first speed-distributing wheel and the second speed-distributing wheel through a first movable pin cylinder.

[0011] Preferably, the four-bar linkage includes a first link, the top end of which is connected to a first movable pin cylinder, a sliding rod fixedly mounted on the first movable pin cylinder along the extension direction of the first link, and a lifting motor fixedly mounted on the side of the first link. The four-bar linkage also includes a fourth link, one end of which is connected to a slider assembly.

[0012] Preferably, the bottom end of the first link is hinged to the second link, the rear end of the second link is fixedly fitted with a foot pedal, the middle section of the second link is hinged to the third link, the top end of the third link is movably fitted to one side of the fixed platform through the second movable pin, and the third link and the first link are hingedly connected through the fourth link; the first link, the second link, the third link and the fourth link form a movable quadrilateral.

[0013] Preferably, the top of the fixed platform is equipped with a control device, and the bottom ends of the front support and the rear support are fixedly connected with connecting seats. The bottom ends of the connecting seats are respectively fixedly connected with the front base and the rear base. The bottom ends of the front base and the rear base are each equipped with supporting feet. The front ends of the front base are also equipped with walking wheels on both sides, and the rear ends of the rear base are welded with handles.

[0014] Compared with the prior art, the advantages of this utility model are as follows: an electric adjustment structure is designed on the four-bar linkage structure. The output end of the lifting motor pushes the slider assembly to slide on the sliding rod. The slider assembly simultaneously drives the fourth linkage to move, causing the angle inside the four-bar linkage structure to change, thereby adjusting the step distance. The electric adjustment structure improves the convenience of adjusting the step distance and reduces the potential risks to the user during the adjustment process. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This utility model is attached Figure 2 A magnified schematic diagram of the structure of part A in the diagram; Figure 4 This is a schematic diagram of the structure of this utility model; Figure 5 This utility model is attached Figure 4 A magnified schematic diagram of part B.

[0016] Reference numerals: 1. Sliding rod; 2. Lifting motor; 3. Slider assembly; 4. Output end; 5. Central support; 6. Front support; 7. Rear support; 8. Fixed platform; 9. Front mounting base; 10. Speed ​​ratio wheel; 11. Drive wheel; 12. Inertia wheel; 13. Small wheel; 14. First belt; 15. Second belt; 16. First speed distribution wheel; 17. Second speed distribution wheel; 18. First movable pin cylinder; 19. First connecting rod; 20. Second connecting rod; 21. Third connecting rod; 22. Fourth connecting rod; 23. Foot pedal; 24. Second movable pin cylinder; 25. Control device; 26. Connecting seat; 27. Front base; 28. Rear base; 29. ​​Support feet; 30. Traveling wheel; 31. Handle. Detailed Implementation

[0017] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0018] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] Furthermore, in addition to indicating orientation or positional relationship, the aforementioned terms may also be used to indicate other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in this utility model can be understood according to the specific circumstances.

[0020] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts. The connection methods described herein are existing technologies without any modifications and are common knowledge to those skilled in the art. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] like Figures 1 to 5 As shown, this utility model provides an elliptical machine with an electrically adjustable step size structure, including a frame. The front end of the frame is provided with a wheel unit, and four-bar linkages are provided on both sides of the frame. The four-bar linkages are connected to the frame and the wheel unit respectively. Stepping on the four-bar linkages causes them to reciprocate back and forth, and the four-bar linkages drive the wheel unit to rotate. Specifically, the four-bar linkages are provided with an electrically adjustable structure for adjusting the step size. The electrically adjustable structure drives the four-bar linkages to slide, changing the internal angle of the four-bar linkages to adjust the step size.

[0023] The four-bar linkage extends with a sliding rod 1 that cooperates with the electric adjustment structure. The electric adjustment structure includes a lifting motor 2 mounted on the four-bar linkage and a slider assembly 3 that slides in cooperation with the lifting motor 2. Specifically, one end of the slider assembly 3 is slidably mounted on the sliding rod 1, and the other end of the slider assembly 3 is movably connected to the four-bar linkage.

[0024] The lifting motor 2 is provided with an output end 4, which is connected to the slider assembly 3. Specifically, the lifting motor 2 drives the output end 4 to rise and fall, and the output end 4 pushes the end of the slider assembly 3 to slide along the sliding rod 1. The other end of the slider assembly 3 drives the four-bar linkage to move, and the internal angle of the four-bar linkage changes.

[0025] The frame includes a central support 5, a front support 6, and a rear support 7. The rear support 7 is fixedly connected to the bottom of the central support 5, the front support 6 is fixedly connected to the top of the central support 5, the front end of the rear support 7 is connected to the middle of the front support 6, and a fixed platform 8 is fixedly connected to the top of the front support 6. Specifically, a front mounting seat 9 is fixedly connected to the front end of the top of the front support 6, the wheel unit is mounted on the front mounting seat 9, and the sliding rod 1 is fixedly mounted on the outside of the wheel unit.

[0026] The wheel unit includes a speed ratio wheel 10, a drive wheel 11, an inertia wheel 12, and a small wheel 13. The drive wheel 11 is located on one side of the front mounting base 9 and is arranged between the speed ratio wheel 10 and the inertia wheel 12. The small wheel 13 is arranged between the speed ratio wheel 10 and the drive wheel 11. Specifically, one end of the speed ratio wheel 10 is connected to the inertia wheel 12 via a first belt 14, and the other end of the speed ratio wheel 10 is connected to the drive wheel 11 via a second belt 15. The second belt 15 passes around the small wheel 13 near the middle.

[0027] The drive wheel 11 is connected to the outer side of the first speed wheel 16, and the front mounting base 9 is connected to the second speed wheel 17 on the side away from the first speed wheel 16. Specifically, the four-bar linkage units on both sides of the frame are connected to the first speed wheel 16 and the second speed wheel 17 respectively through the first movable pin cylinder 18.

[0028] The four-bar linkage includes a first link 19, the top end of which is connected to a first movable pin cylinder 18, and a sliding rod 1 is fixedly mounted on the first movable pin cylinder 18 along the extension direction of the first link 19. Specifically, the lifting motor 2 is fixedly mounted on the side of the first link 19. The four-bar linkage also includes a fourth link 22, one end of which is connected to the slider assembly 3.

[0029] The bottom end of the first connecting rod 19 is hinged to the second connecting rod 20. The rear end of the second connecting rod 20 is fixedly fitted with a foot pedal 23. The middle section of the second connecting rod 20 is hinged to the third connecting rod 21. The top end of the third connecting rod 21 is movably fitted to one side of the fixed platform 8 through the second movable pin 24. The third connecting rod 21 and the first connecting rod 19 are hinged together through the fourth connecting rod 22. Specifically, the first connecting rod 19, the second connecting rod 20, the third connecting rod 21 and the fourth connecting rod 22 form a movable quadrilateral.

[0030] A control device 25 is installed on the top of the fixed platform 8. Connecting seats 26 are fixedly connected to the bottom ends of both the front support 6 and the rear support 7. Front base 27 and rear base 28 are fixedly connected to the bottom ends of the connecting seats 26, respectively. Specifically, supporting feet 29 are installed at the bottom ends of both the front base 27 and the rear base 28. Wheels 30 are installed on both sides of the front end of the front base 27, and a handle 31 is welded to the rear end of the rear base 28. The control device 25 is electrically connected to the electric adjustment structure.

[0031] The supporting feet 29 are made of high-elastic rubber, which has a good silent rebound effect and reduces the shaking or collision noise caused by vibration transmission. If you need to move the machine to other places, lift the handle 31 at the rear base 28 to let the front wheel 30 of the front base 27 land on the ground and push the machine to the designated location. This design ensures that the machine can move flexibly between places, taking into account both landing stability and mobility.

[0032] The principle of step length adjustment of this utility model is as follows: The lifting motor 2 is started by the control device 25. The lifting motor 2 drives the output end 4 to rise and fall. The output end 4 pushes the slider assembly 3 to rise and fall. One end of the slider assembly 3 slides along the sliding rod 1. The other end of the slider assembly 3 drives the end of the fourth link 22 to move. Since the first link 19, the second link 20, the third link 21 and the fourth link 22 form a movable quadrilateral, the movement of the fourth link 22 drives the first link 19, the second link 20 and the third link 21 to move, so that the angle inside the quadrilateral formed by the four-link structure changes, thereby adjusting the initial height of the front end of the second link 20. The initial height of the foot pedal 23 is adjusted, the stride trajectory is adjusted, and the step length is adjusted.

[0033] The working principle of this utility model is as follows: When the user steps on the foot pedal 23, the electric adjustment structure is controlled by the control device 25 to adjust the stride to a suitable size. The user walks back and forth by stepping on the foot pedal 23. The movement of the foot pedal 23 drives the movement of the four-bar linkage through the second link 20. The top of the third link 21 rotates around the fixed platform 8 through the second movable pin 24. The top of the first link 19 drives the first speed wheel 16 to rotate through the first movable pin 18. The first speed wheel 16 drives the connected drive wheel 11 to rotate. The drive wheel 11 drives the speed ratio wheel 10 to rotate through the second belt 15. In turn, the speed ratio wheel 10 drives the inertia wheel 12 to rotate through the first belt 14. The inertia wheel 12 rotates and generates inertia. Under the action of inertia, the inertia wheel 12 continues to rotate and transmits the force generated by inertia to the foot pedal 23 in the opposite direction through the above force transmission path. This reduces the force exerted by the user's feet on the foot pedal 23, while providing a good workout.

[0034] The advantages of this utility model are as follows: an electric adjustment structure is designed on the four-bar linkage structure. The output end 4 of the lifting motor 2 pushes the slider assembly 3 to slide on the sliding rod 1. The slider assembly 3 simultaneously drives the fourth link 22 to move, so that the angle inside the four-bar linkage structure changes, thereby adjusting the step distance. The electric adjustment structure improves the convenience of adjusting the step distance and reduces the potential risks to the user during the adjustment process.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, welding, and bonding that are mature in the existing technology, and will not be described in detail here.

[0037] The above description is only a preferred embodiment of this utility model. For those skilled in the art, various modifications and variations can be made in the specific implementation and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An elliptical machine with an electrically adjustable step height structure, comprising a frame, characterized in that: The frame has a wheel unit at the front end and four-bar linkages on both sides. The four-bar linkages are connected to the frame and the wheel unit respectively. Stepping on the four-bar linkages causes them to reciprocate back and forth, which in turn drives the wheel unit to rotate. The four-bar linkages are equipped with an electric adjustment mechanism for adjusting the step distance. The electric adjustment mechanism causes the four-bar linkages to slide, changing the internal angle of the four-bar linkages and thus adjusting the step distance.

2. An elliptical machine with an electrically adjustable step size structure according to claim 1, characterized in that: The four-bar linkage extends with a sliding rod that cooperates with the electric adjustment structure. The electric adjustment structure includes a lifting motor mounted on the four-bar linkage and a slider assembly that slides in cooperation with the lifting motor. One end of the slider assembly is slidably mounted on the sliding rod, and the other end of the slider assembly is movably connected to the four-bar linkage.

3. An elliptical machine with an electrically adjustable step size structure according to claim 2, characterized in that: The lifting motor is equipped with an output end, which is connected to the slider assembly. The lifting motor drives the output end to rise and fall, and the output end pushes the end of the slider assembly to slide along the sliding rod. The other end of the slider assembly drives the four-bar linkage to move, and the internal angle of the four-bar linkage changes.

4. An elliptical machine with an electrically adjustable step size structure according to claim 2, characterized in that: The frame includes a central support, a front support, and a rear support. The rear support is fixedly connected to the bottom of the central support, the front support is fixedly connected to the top of the central support, the front end of the rear support is connected to the middle of the front support, a fixed platform is fixedly connected to the top of the front support, a front mounting seat is fixedly connected to the front end of the top of the front support, a wheel unit is mounted on the front mounting seat, and a sliding rod is fixedly mounted on the outside of the wheel unit.

5. An elliptical machine with an electrically adjustable step size structure according to claim 4, characterized in that: The wheel unit includes a speed ratio wheel, a drive wheel, an inertia wheel, and a small wheel. The drive wheel is located on one side of the front mounting base and is arranged between the speed ratio wheel and the inertia wheel. The small wheel is arranged between the speed ratio wheel and the drive wheel. One end of the speed ratio wheel is connected to the inertia wheel via a first belt, and the other end of the speed ratio wheel is connected to the drive wheel via a second belt. The second belt passes around the small wheel near the middle.

6. An elliptical machine with an electrically adjustable step size structure according to claim 5, characterized in that: The drive wheel is connected to a first speed wheel on its outer side, and the front mounting base is connected to a second speed wheel on the side away from the first speed wheel. The four-bar linkage units on both sides of the frame are connected to the first speed wheel and the second speed wheel respectively through the first movable pin cylinder.

7. An elliptical machine with an electrically adjustable step size structure according to claim 6, characterized in that: The four-bar linkage includes a first link, the top end of which is connected to a first movable pin cylinder. A sliding rod is fixedly mounted on the first movable pin cylinder along the extension direction of the first link. A lifting motor is fixedly mounted on the side of the first link. The four-bar linkage also includes a fourth link, one end of which is connected to a slider assembly.

8. An elliptical machine with an electrically adjustable step size structure according to claim 7, characterized in that: The bottom end of the first link is hinged to the second link, the rear end of the second link is fixedly fitted with a foot pedal, the middle section of the second link is hinged to the third link, the top end of the third link is movably fitted to one side of the fixed platform through the second movable pin, and the third link and the first link are hinged together by the fourth link; the first link, the second link, the third link and the fourth link form a movable quadrilateral.

9. An elliptical machine with an electrically adjustable step size structure according to claim 4, characterized in that: The top of the fixed platform is equipped with a control device. The bottom of the front support and the rear support are both fixedly connected to a connecting seat. The bottom of the connecting seat is fixedly connected to the front base and the rear base respectively. The bottom of the front base and the rear base are both equipped with supporting feet. The front sides of the front base are also equipped with walking wheels. The rear end of the rear base is welded with a handle.

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