A large stride elliptical machine with short foot pedals

Abstract

The utility model belongs to the technical field of elliptical machine, especially short footboard pipe's big step distance elliptical machine. Short footboard pipe's big step distance elliptical machine, include: frame, crank, its rotation is in the left and right sides of frame rear end, rocker, its rotation is in the left and right sides of frame front end, connecting rod, one end is articulated with rocker, the other end is articulated with crank, and footboard subassembly, it includes the footboard pipe articulated with rocker, the rear end rotation of footboard pipe is fixed with gyro wheel, gyro wheel rolls and supports on connecting rod, wherein, the articulated place of connecting rod with rocker is higher than the articulated place of footboard pipe with rocker, when the crank occurs rotation, gyro wheel occurs linear motion along the extension direction of connecting rod, and the rear end of footboard pipe does not protrude the rear end of elliptical machine. The utility model has the advantages that can avoid footboard pipe to protrude to the outside of elliptical machine main body.

Description

Technical Field

[0001] This utility model belongs to the field of elliptical machine technology, and in particular relates to a short foot tube elliptical machine with a large step distance. Background Technology

[0002] A significant drawback of current mainstream elliptical trainers with long strides is that, during use, especially when the crank is rotated to the extreme position at the rear of the treadmill, the excessively long pedal bar extends far beyond the main frame, significantly impacting the movement or safety of people in the rear space.

[0003] Taking the elliptical trainer disclosed in Chinese patent application No. 201920482755.8 as an example, its core structure includes a cantilever, a foot pedal assembly, a crank, a connecting rod, and rollers. The key feature of this design is that a drive shaft is provided on the crank, and one end of the rollers and one end of the connecting rod are both pivotally connected to this drive shaft; the other end of the connecting rod is connected to the cantilever, and the foot pedal assembly is supported on the rollers.

[0004] The aforementioned length issue arises from the way the pedal assembly is directly supported on the rollers rotating around the crank drive shaft. To ensure the pedal assembly remains firmly supported on the roller surface throughout its movement, the pedal tubes must be designed to be quite long. Consequently, when the crank reaches its final position, the excessively long pedal tubes inevitably protrude significantly backward, exceeding the rear profile of the flywheel or main frame, thus encroaching on rear space and creating potential safety hazards and spatial interference. Utility Model Content

[0005] To address the shortcomings of existing technologies, a long-step elliptical machine is provided that avoids the foot tubes extending beyond the main body of the elliptical machine.

[0006] This utility model is achieved using the following technical solution: a short-pedal elliptical trainer with a large step distance, comprising:

[0007] frame;

[0008] The cranks rotate on the left and right sides at the rear end of the frame;

[0009] The rocker arm rotates on the left and right sides at the front of the frame;

[0010] A connecting rod, one end of which is hinged to the rocker arm, and the other end of which is hinged to the crank; and

[0011] A foot pedal assembly includes a foot pedal tube hinged to a rocker arm, the rear end of which is rotatably fixed with a roller, the roller being rolledly supported on the connecting rod;

[0012] Wherein, the hinge point between the connecting rod and the rocker arm is higher than the hinge point between the foot pedal tube and the rocker arm; when the crank rotates, the roller moves linearly along the extension direction of the connecting rod, and the rear end of the foot pedal tube does not extend beyond the rear end of the elliptical machine.

[0013] A roller is rotatably connected to the rear end of the foot tube, and this roller is rolled and supported on a connecting rod. Since the two ends of the connecting rod are hinged to the rocker arm and crank respectively, when the crank rotates around the rear end of the frame, it drives the connecting rod to perform a combined motion relative to the rocker arm and crank. During this process, the roller supported on the connecting rod rolls linearly along the extension direction of the connecting rod. This unique rolling support mechanism offers a key advantage: the roller always moves along the length of the connecting rod during crank rotation, and its position is always above the connecting rod (even when the crank rotates to the rearmost position of the elliptical machine). Therefore, the foot tube does not need to extend significantly rearward to accommodate the roller's circular motion, thus significantly shortening its length and effectively solving the problem of excessively long foot tubes encroaching on rear space in traditional designs. Furthermore, shortening the foot tube saves material and also reduces the overall weight of the elliptical machine and simplifies packaging.

[0014] In this design, the hinge point between the connecting rod and the rocker arm is higher than the hinge point between the foot pedal tube and the rocker arm, which allows the major axis of the elliptical trajectory of the foot pedal tube to be longer during movement, thereby generating a larger step distance.

[0015] Preferably, the roller is rotatably fixed to the side of the foot pedal tube.

[0016] By rotating and fixing the rollers to the side of the pedal tubes, the height of the pedal tubes will not be too high when the crank is at its highest point. This avoids the problem of users having to lift their legs too much or experiencing discomfort when pedaling due to the pedal position being too high, thus optimizing the ergonomic design and improving user comfort.

[0017] Preferably, the roller is rotatably fixed to the inner side of the foot pedal tube.

[0018] By placing the rollers on the inside of the foot tubes, the connecting rods can also be placed on the inside of the foot tubes, resulting in a more compact structure and reducing the overall space occupied by the elliptical machine.

[0019] Preferably, a foot pedal is fixed to the upper rear end of the foot pedal tube, and the foot pedal covers the roller to visually obstruct the roller when it is stepped on.

[0020] By covering the rollers with foot pedals, force can be transferred to the rollers more effectively, and the rollers can be hidden from view from above, which is more aesthetically pleasing and provides a better user experience; it can also prevent clothing from being caught in the rollers.

[0021] Preferably, the foot pedal is located directly above the foot tube and is positioned towards the inside of the frame.

[0022] By positioning the foot pedals towards the inside of the frame, the lateral distance between the two foot pedals is effectively reduced, resulting in a narrower stride width (narrow stride width design). This layout better conforms to the hip adduction state of the human body during natural walking or running, effectively reducing the hip abduction range (i.e., the distance between the legs) required for the user during exercise, thereby significantly improving exercise comfort and efficiency, and reducing discomfort or potential strain risks caused by excessive stride width.

[0023] Preferably, a limiting structure is provided between the roller and the connecting rod; the limiting structure is as follows:

[0024] A groove is provided on the circumferential sidewall of the roller, and the outer wall of the connecting rod contacts and fits against the groove wall; or

[0025] The connecting rod is provided with a U-shaped groove or a V-shaped groove extending along its length, and the circumferential outer wall of the roller contacts and engages with the groove wall of the U-shaped groove or V-shaped groove.

[0026] By setting the above-mentioned limiting structure, the foot pedal tube is prevented from swaying left and right during sliding, thereby improving stability.

[0027] Preferably, the connecting rod is provided with a rigid guide rail facing the outer wall of the roller. The rigid guide rail is adapted to and fixedly covers the outer wall of the connecting rod, and the roller directly rolls and is supported on the outer surface of the rigid guide rail.

[0028] The rigid guide rail acts as a replaceable or maintainable wear-resistant interface, with its high-strength, high-hardness contact surface directly bearing the cyclic load and friction of the roller. It fundamentally isolates the connecting rod from direct contact with the roller, preventing damage such as wear marks, crushing, or material peeling from the connecting rod surface caused by long-term high-pressure rolling friction. This extends the service life of the entire connecting rod. The rigid guide rail can be made of aluminum alloy.

[0029] Preferably, the length of the rigid guide rail corresponds to the linear travel length of the roller along the connecting rod.

[0030] The length of the rigid guide rail corresponds to the linear travel of the roller, which can save on the material of the rigid guide rail.

[0031] Compared with the existing technology, the beneficial effects of this utility model are: 1. During the entire use of the elliptical machine, the enveloping space of the equipment is reduced, especially since the foot pedal tube will not extend to the rear of the elliptical machine, solving the problem of the foot pedal tube extending too far and encroaching on the rear space in the traditional design; 2. Shortening the foot pedal tube can also save materials, and at the same time, it can also reduce the weight of the entire elliptical machine and reduce the packaging difficulty; 3. The foot pedals are arranged biased towards the inside of the frame, which can effectively reduce the lateral distance between the two foot pedals, conform to ergonomics, and make the user experience better. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the utility model;

[0033] Figure 2 An enlarged view of the foot pedal roller support at the connecting rod;

[0034] Figure 3 This is a schematic diagram of the foot pedal tube structure;

[0035] Figure 4 Rear view of the foot pedal and frame;

[0036] Figure 5 This is a structural diagram of the frame, connecting rods, rigid guide rails, and rollers.

[0037] Reference numerals: 1. Frame; 2. Drive shaft; 3. Flywheel; 4. Linkage rod; 41. Rigid guide rail; 5. Foot pedal tube; 51. Foot pedal; 6. Roller; 61. Connecting plate; 7. Rocker arm. Detailed Implementation

[0038] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0039] like Figures 1 to 3 As shown, this embodiment discloses a short-pedal-tube, large-step elliptical machine, including a frame 1. The frame 1 forms a frame extending in the front-rear direction. A flywheel 3 is provided at the rear end of the frame 1, and cranks (not shown in the figure) are connected to the left and right sides of the flywheel 3. A drive shaft 2 is provided at the end of the crank. Rocker arms 7 are rotatably connected to the left and right sides of the front end of the frame 1. The lower end of the rocker arms 7 is hinged to a foot pedal assembly. The foot pedal assembly includes a foot pedal tube 5 and foot pedals 51 located directly above the foot pedal tube 5. The foot pedals 51 are offset towards the inside of the frame 1, so that the two foot pedals 51 have a narrow step width design. A connecting rod 4 is provided between the rocker arms 7 and the drive shaft 2. The two ends of the connecting rod 4 are respectively hinged to the rocker arms 7 and the drive shaft 2, and the hinge point between the connecting rod 4 and the rocker arms 7 is higher than the hinge point between the foot pedal tube 5 and the rocker arms 7.

[0040] A downwardly extending connecting plate 61 is fixed to the lower end of the foot pedal 51, and the connecting plate 61 is located inside the foot pedal tube 5. The outer side of the connecting plate 61 is in close contact with the foot pedal tube 5, and the inner side of the connecting plate 61 is provided with a laterally extending connecting shaft. A roller 6 is rotatably connected to the connecting shaft, thereby realizing that the roller 6 is rotatably fixed to the inner side of the foot pedal tube 5. At the same time, the foot pedal 51 covers the roller 6 and is set towards the inner side of the frame 1, so that the user cannot see the roller 6 below when stepping on the foot pedal 51.

[0041] like Figure 1 , Figure 2 and Figure 5 As shown, connecting rod 4 is located below roller 6, which rolls and is supported on connecting rod 4. Roller 6 has an annular groove on its outer wall. The cross-sectional shape of connecting rod 4 is elliptical, allowing its wall to fit snugly against the annular groove. A rigid guide rail 41 is fixedly mounted on the outer wall of connecting rod 4 facing roller 6. The rigid guide rail 41 is made of aluminum alloy and is arc-shaped to fit the outer wall of connecting rod 4. The extension length of the rigid guide rail 41 corresponds to the linear travel length of roller 6 along connecting rod 4, and roller 6 rolls and is supported directly on the outer surface of the rigid guide rail 41.

[0042] In some other implementations, a U-shaped groove or V-shaped groove extending along the length of the connecting rod 4 may be provided, and the rigid guide rail 41 is U-shaped or V-shaped and is fixed in close contact with the U-shaped groove or V-shaped groove. The circumferential outer wall of the roller 6 is rolled and supported on the rigid guide rail 41 (not shown in the figure).

Claims

1. A short-pedal elliptical trainer with a large stride, characterized in that, include: frame; The cranks rotate on the left and right sides at the rear end of the frame; The rocker arm rotates on the left and right sides at the front of the frame; A connecting rod, one end of which is hinged to the rocker arm, and the other end of which is hinged to the crank; and A foot pedal assembly includes a foot pedal tube hinged to a rocker arm, the rear end of which is rotatably fixed with a roller, the roller being rolledly supported on the connecting rod; Wherein, the hinge point between the connecting rod and the rocker arm is higher than the hinge point between the foot pedal tube and the rocker arm; when the crank rotates, the roller moves linearly along the extension direction of the connecting rod, and the rear end of the foot pedal tube does not extend beyond the rear end of the elliptical machine.

2. The short-pedal elliptical trainer with a large stride according to claim 1, characterized in that: The roller is fixed to the side of the foot pedal tube.

3. The short-pedal elliptical trainer with a large step distance according to claim 2, characterized in that: The roller is fixed to the inner side of the foot pedal tube.

4. The short-pedal elliptical trainer with a large stride according to claim 1, characterized in that: A foot pedal is fixed to the upper rear end of the foot pedal tube. The foot pedal covers the roller and is used to visually obstruct the roller when it is stepped on.

5. The short-pedal elliptical trainer with a large stride according to claim 4, characterized in that: The foot pedal is located directly above the foot tube and is positioned towards the inside of the frame.

6. The short-pedal elliptical trainer with a large step distance according to claim 1, characterized in that: A limiting structure is provided between the roller and the connecting rod; the limiting structure is as follows: A groove is provided on the circumferential sidewall of the roller, and the outer wall of the connecting rod contacts and fits against the groove wall; or The connecting rod is provided with a U-shaped groove or a V-shaped groove extending along its length, and the circumferential outer wall of the roller contacts and engages with the groove wall of the U-shaped groove or V-shaped groove.

7. The short-pedal elliptical trainer with a large step distance according to claim 1 or 6, characterized in that: The connecting rod is provided with a rigid guide rail facing the outer wall of the roller. The rigid guide rail is adapted to and fixedly covers the outer wall of the connecting rod. The roller directly rolls and is supported on the outer surface of the rigid guide rail.

8. The short-pedal elliptical trainer with a large step distance according to claim 7, characterized in that: The length of the rigid guide rail corresponds to the linear travel length of the roller along the connecting rod.

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