Elliptical machine with variable step pitch

Abstract

The invention discloses an elliptical machine with a variable step pitch. The elliptical machine comprises a bottom frame; a stand; a flywheel structure; the rotating structure comprises a rotating shaft piece, a sliding chain, a double-chain sliding block and a single-chain sliding block, the rotating shaft piece is rotationally arranged at the axis of the flywheel structure, a movable channel is formed in the rotating shaft piece and is divided into two single-chain channels and a double-chain channel, the double-chain channel is communicated with the two single-chain channels, and the single-chain sliding block is arranged in the double-chain channel. The number of the sliding chains is two, one ends of the two sliding chains are combined with each other, connected to the double-chain sliding block and arranged in the double-chain channel together in a sliding mode, a single-chain sliding block is arranged at the other ends of the two sliding chains, and the single-chain sliding block and the single sliding chain can slide in the single-chain channel. A pedal structure; by driving the double-chain sliding block or the single single-chain sliding block, the two sliding chains can slide together, the sliding positions of the two single-chain sliding blocks are changed at the same time, and then the step pitch of the pedal structure is adjusted.

Description

Technical Field

[0001] This application relates to the field of fitness equipment technology, and in particular to an elliptical machine with variable stride length. Background Technology

[0002] Elliptical trainers are a common type of fitness equipment, widely popular due to their elliptical motion trajectory, which minimizes impact on the user's joints and allows for simultaneous exercise of both upper and lower limbs. To meet the needs of users of different heights or the varying exercise intensities of the same user, many elliptical trainers are designed with adjustable stride length.

[0003] Currently, most commercially available adjustable-step elliptical trainers typically have their adjustment mechanism located at the connection between the pedal linkage system and the flywheel crank. For example, some solutions use multiple sets of hinge holes in different positions. For instance, the adjustable-step elliptical trainer proposed in publication CN223788027U uses an extension rod connected to the end of the crank, with several mounting holes on the extension rod. The step size is adjusted by connecting the free end of the pedal to different mounting holes. However, this type of adjustment often requires adjustment on both sides separately and can only adjust the step size at a fixed level, failing to accommodate users with varying step sizes. Other solutions use electric push rods or hydraulic rods to directly drive the slider, changing the fulcrum position of the linkage. While this method allows for stepless adjustment, it usually requires separate drive sources for the left and right pedals, or directly lifting part of the linkage structure. This adjustment method is costly and requires extremely high synchronization between the two sides, making it prone to synchronization errors. Therefore, solving these problems is the purpose of this application.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides an elliptical machine with variable step size to solve one of the aforementioned technical problems.

[0006] The technical solution adopted by this application to solve its technical problem is an elliptical machine with variable step distance, including: a base frame, on which a sliding frame is provided; a vertical frame, provided on the base frame; a flywheel structure, provided on the vertical frame; a rotating structure, including a rotating shaft, sliding chains, a double-chain sliding block, and a single-chain sliding block. The rotating shaft is rotatably disposed at the axis of the flywheel structure. An active channel is provided inside the rotating shaft. The active channel is divided into two single-chain channels and one double-chain channel, with the double-chain channel connecting the two single-chain channels respectively. There are two sliding chains, one end of which is merged and connected to the double-chain sliding block. The two sliding chains are slidably arranged within the double-chain channel. A single-chain sliding block is provided at the other end of each of the two sliding chains, allowing the single-chain sliding block and the single sliding chain to slide within the single-chain channel. Two pedal structures are provided, located on either side of the flywheel structure. Each pedal structure includes a sliding rod, one end of which is a winding end, and the other end is a sliding end. The winding end is connected to the sliding block, and the sliding end is slidably positioned above the sliding frame. By driving either the double-chain sliding block or a single-chain sliding block, both sliding chains can slide together, simultaneously changing the sliding positions of the two single-chain sliding blocks, thereby adjusting the step distance of the pedal structure.

[0007] In some embodiments, the pedal structure further includes a handrail and a pedal rod. The handrail is rotatably disposed on the corresponding side of the upright. One end of the pedal rod is hinged to one end of the handrail, and the other end of the pedal rod is provided with a pedal. The sliding rod and the pedal rod are arranged crosswise and hinged to each other.

[0008] In some embodiments, a drive structure is also included, the drive structure including a limiting rope and a stop lever, one end of the limiting rope being connected to the double-chain sliding block or the single-chain sliding block, and the other end extending out of the double-chain channel or the single-chain channel and being provided with a hook, the stop lever being disposed on the outside of the rotating shaft, and the hook being attached to the stop lever.

[0009] In some embodiments, a drive structure is further included, which is a hydraulic rod or an electric push rod, and the output end of the drive structure is directly connected to the double-chain sliding block or the single-chain sliding block.

[0010] In some embodiments, the single chain channel has an axially formed elongated groove on the side near the sliding rod, and a connecting portion is provided on one side of the single chain sliding block to connect with the rewinding end.

[0011] In some embodiments, when the double-chain sliding block is driven to move axially, the two single-chain sliding blocks move toward or away from each other in their respective single-chain channels, thereby synchronously changing the swing amplitude of the pedal structures on both sides.

[0012] In some embodiments, the rotating shaft has an axially extending slide rail inside, the slide rail having an overall h-shaped cross-section, one of which is a sliding chain arranged in a straight line in the double chain channel and the corresponding single chain channel, and the other sliding chain has two bent portions so that the two ends of the sliding chain are respectively accommodated in the double chain channel and the corresponding single chain channel.

[0013] The beneficial effects of this application are as follows: by using two sliding chains connected at one end, the single-chain sliding block connected to the other side of the sliding chain can move simultaneously when the double-chain sliding block slides, thereby adjusting the rotating shaft at the same time. In conjunction with the pedal structure adapted to this structure, the effect of adjusting the step distance can be achieved. At the same time, this structure can be configured as manual gear adjustment or as electric or hydraulic automatic adjustment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of this application.

[0016] Figure 2 This is a schematic diagram of the rotating structure of this application.

[0017] Figure 3 This is a cross-sectional schematic diagram of the rotating structure of this application, showing manual adjustment.

[0018] Figure 4 This is a cross-sectional schematic diagram of the hydraulic adjustment of the rotating structure in this application.

[0019] Figure 5 This is a schematic diagram of the sliding chain structure of this application.

[0020] Explanation of reference numerals: 1. Base frame; 11. Sliding frame; 2. Upright frame; 3. Flywheel structure; 4. Rotating structure; 41. Rotating shaft; 411. Single chain channel; 412. Double chain channel; 42. Sliding chain; 43. Double chain sliding block; 44. Single chain sliding block; 441. Connecting part; 45. Slide groove; 5. Pedal structure; 51. Sliding rod; 511. Rewinding end; 512. Sliding end; 52. Handrail; 53. Pedal rod; 54. Pedal; 6. Drive structure; 61. Limiting rope; 611. Hook; 62. Gear lever; 63. Hydraulic rod. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0022] In the embodiments of this application, please refer to Figure 1-5 As shown, this application provides an elliptical machine with variable step size, mainly comprising: a base frame 1, on which a sliding frame 11 is mounted; a vertical frame 2, mounted on the base frame 1; a flywheel structure 3, mounted on the vertical frame 2; and a rotating structure 4, including a rotating shaft 41, a sliding chain 42, a double-chain sliding block 43, and a single-chain sliding block 44. The rotating shaft 41 is rotatably mounted at the axis of the flywheel structure 3. An active channel is provided inside the rotating shaft 41, which is divided into two single-chain channels 411 and one double-chain channel 412. The double-chain channel 412 connects to both single-chain channels 411. There are two sliding chains 42, one end of which is merged and connected to the double-chain sliding block 43 and slid together. Within the double-chain channel 412, a single-chain sliding block 44 is provided at the other end of each of the two sliding chains 42. The single-chain sliding block 44 and the single sliding chain 42 can slide within the single-chain channel 411. Two pedal structures 5 are provided, located on either side of the flywheel structure 3. Each pedal structure 5 includes a sliding rod 51, one end of which is a winding end 511, and the other end is a sliding end 512. The winding end 511 is connected to the sliding block, and the sliding end 512 is slidably positioned above the sliding frame 11. By driving the double-chain sliding block 43 or a single single-chain sliding block 44, both sliding chains 42 can slide together and simultaneously change the sliding position of the two single-chain sliding blocks 44, thereby adjusting the step distance of the pedal structure 5.

[0023] Specifically, by driving the double-chain sliding block 43 to slide along the axial direction of the double-chain channel 412, or by driving the single-chain sliding block 44 on one side to move, the two sliding chains 42 will move in sync, causing the two single-chain sliding blocks 44 to move synchronously within the corresponding single-chain channel 411, thereby changing the position of the rotation fulcrum of the loop end 511 of the sliding rod 51, and synchronously adjusting the movement trajectory amplitude of the pedal structures 5 on both sides, achieving precise adjustment of the step distance. The pedals 54 on both sides are adjusted synchronously throughout the entire process, with no movement error, solving the synchronization problem of traditional adjustment methods.

[0024] Because chains have good flexibility, they can pass through bends and maintain excellent transmission performance. Therefore, when two chains are joined at one end, the other end can be directly connected to the single-chain sliding block 44 located on the other side. The rotating shaft 41 required for the flywheel structure 3 to connect the winding end 511 is often Z-shaped. Therefore, the single-chain channel 411 of the rotating shaft 41 is roughly Z-shaped, while the double-chain channel 412 connects to a corner or any position of the Z-shaped single-chain channel 411 (preferably a corner position, which reduces the difficulty of forming the rotating shaft 41). The two sliding chains 42 in the double-chain channel 412 each extend from the connection point to the corresponding single-chain channel 411.

[0025] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0026] Reference Figure 1 As shown, the pedal structure 5 also includes a handrail 52 and a pedal rod 53. The handrail 52 is rotatably disposed on the corresponding side of the upright 2. One end of the pedal rod 53 is hinged to one end of the handrail 52, and the other end of the pedal rod 53 is provided with a pedal 54. The sliding rod 51 and the pedal rod 53 are cross-arranged and hinged to each other. When the winding end 511 moves on the step adjustment rod, the trajectory radius of the entire linkage mechanism changes synchronously, realizing the overall adjustment of the step distance.

[0027] Reference Figure 2-3 The diagram also includes a drive structure 6, which includes a limiting rope 61 and a stop lever 62. One end of the limiting rope 61 is connected to the double-chain sliding block 43 or the single-chain sliding block 44, and the other end extends out of the double-chain channel 412 or the single-chain channel 411 and is provided with a hook 611. The stop lever 62 is located on the outside of the rotating shaft 41, and the hook 611 is attached to the stop lever 62. The limiting rope 61 is made of wear-resistant nylon rope with high tensile strength. When adjusting the step distance, the user pulls the two limiting ropes 61 connected to the double-chain sliding block 43 and the single-chain sliding block 44 respectively, using a sawing motion to move the single-chain sliding block 44 to the target position. The two hooks 611 are then hooked into the corresponding slots of the corresponding gear levers 62 to lock the slider position and complete the step distance adjustment. If the step distance needs to be changed, the hooks 611 can be removed and re-hooked. At the same time, due to the characteristics of the limiting rope 61 itself, the limiting rope 61 can be partially wrapped around the passing gear lever 62 according to the user's actual experience. This allows the manual adjustment structure to not only adjust the gear but also increase or decrease the length for a certain degree of stepless adjustment.

[0028] Reference Figure 4As shown, it also includes a drive structure 6, which is a hydraulic rod 63 or an electric push rod. The output end of the drive structure 6 is directly connected to the double-chain sliding block 43 or the single-chain sliding block 44. The electric push rod is adapted to a DC power supply and can be controlled by the elliptical machine control panel to start, stop, and extend / retract the stroke. The hydraulic rod 63 provides precise drive. In use, commands are sent through the control panel, and the drive structure 6 drives the slider to move axially. Stepless adjustment of the step distance can be achieved without manual operation. Furthermore, due to the characteristics of the rotating structure 4, a single drive structure 6 can achieve synchronous adjustment on both sides. Compared with traditional independent dual-side drives, this structure can effectively reduce costs and simplify the structure.

[0029] The single-chain channel 411 has an axially oriented elongated groove 45 on one side near the sliding rod 51. The single-chain sliding block 44 has a connecting part 441 on one side to connect with the winding end 511. The groove 45 guides and limits the connecting part 441, ensuring that the single-chain sliding block 44 slides in a straight line without deviation or shaking. The connection method between the sliding shaft and the winding end 511 is adapted to the rotation of the rotating shaft 41 and the swing of the sliding rod 51.

[0030] Specifically, when the double-chain sliding block 43 is driven to move axially, the two single-chain sliding blocks 44 move towards or away from each other in their respective single-chain channels 411, thereby synchronously changing the swing amplitude of the pedal structures 5 on both sides. The pedal structures 5 on both sides are adjusted synchronously throughout the entire process, the step distance changes in the same way, and the movement trajectory is completely symmetrical.

[0031] Reference Figure 2-4 As shown, the rotating shaft 41 has an axially extending slide rail inside. The cross-section of the slide rail is generally H-shaped. The special cross-sectional shape is adapted to the layout trajectory of the two sliding chains 42, realizing a smooth transition between chain separation and merging. One sliding chain 42 is arranged in a straight line in the double chain channel 412 and the corresponding single chain channel 411. The other sliding chain 42 has two bent parts. The bending angle is adapted to the contour of the H-shaped slide rail, so that one end of the sliding chain 42 is accommodated in the double chain channel 412, and the other end extends smoothly into the single chain channel 411 on the other side. This ensures that both ends of the sliding chain 42 are accommodated in the double chain channel 412 and the corresponding single chain channel 411, respectively. The two sliding chains 42 do not interfere with each other and are not entangled or jammed.

[0032] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An elliptical machine with variable step size, characterized in that, include: A base frame, on which a sliding frame is provided; The upright frame is mounted on the base frame; A flywheel structure is mounted on the upright frame; The rotating structure includes a rotating shaft, a sliding chain, a double-chain sliding block, and a single-chain sliding block. The rotating shaft is rotatably mounted at the axis of the flywheel structure. The rotating shaft has an internal movable channel, which is divided into two single-chain channels and one double-chain channel. The double-chain channel connects to the two single-chain channels. There are two sliding chains. One end of the two sliding chains is merged together and connected to the double-chain sliding block and slides together in the double-chain channel. The other end of the two sliding chains is provided with a single-chain sliding block. The single-chain sliding block and the single sliding chain can slide in the single-chain channel. The pedal structure is configured as two, and is located on both sides of the flywheel structure respectively. The pedal structure includes a sliding rod, one end of which is a winding end and the other end is a sliding end. The winding end is connected to the sliding block, and the sliding end is slidably disposed above the sliding frame. By driving a double-chain sliding block or a single-chain sliding block, both sliding chains can slide together and simultaneously change the sliding position of the two single-chain sliding blocks, thereby adjusting the step distance of the pedal structure.

2. The elliptical machine with variable step size according to claim 1, characterized in that, The pedal structure also includes a handrail and a pedal rod. The handrail is rotatably mounted on the corresponding side of the upright. One end of the pedal rod is hinged to one end of the handrail, and the other end of the pedal rod is provided with a pedal. The sliding rod and the pedal rod are arranged crosswise and hinged to each other.

3. The elliptical machine with variable step size according to claim 1, characterized in that, It also includes a drive structure, which includes a limiting rope and a stop lever. One end of the limiting rope is connected to the double-chain sliding block or the single-chain sliding block, and the other end extends out of the double-chain channel or the single-chain channel and is provided with a hook. The stop lever is located on the outside of the rotating shaft, and the hook is attached to the stop lever.

4. The elliptical machine with variable step size according to claim 1, characterized in that, It also includes a drive structure, which is a hydraulic rod or an electric push rod, and the output end of the drive structure is directly connected to the double-chain sliding block or the single-chain sliding block.

5. The elliptical machine with variable step size according to claim 1, characterized in that, The single-chain channel has an axially oriented long groove on the side near the sliding rod, and a connecting part is provided on one side of the single-chain sliding block to connect with the winding end.

6. The elliptical machine with variable step size according to claim 1, characterized in that, When the double-chain sliding block is driven to move axially, the two single-chain sliding blocks move towards or away from each other in their respective single-chain channels, thereby synchronously changing the swing amplitude of the pedal structures on both sides.

7. The elliptical machine with variable step size according to claim 1, characterized in that, The rotating shaft has an axially extending slide rail inside. The cross-section of the slide rail is generally h-shaped. One sliding chain is arranged in a straight line in the double chain channel and the corresponding single chain channel. The other sliding chain has two bent parts so that the two ends of the sliding chain are respectively accommodated in the double chain channel and the corresponding single chain channel.

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