Elliptical machine resistance adjustment device

Abstract

The utility model relates to the technical field of body -building apparatus, concretely is an elliptical machine resistance adjusting device, including mounting frame and fixedly installed mounting shell at mounting frame tail end, the centre of mounting shell is equipped with the pivot that rotates, the inside rotation of mounting shell is equipped with the fixed disc and the movable disc, the fixed disc is fixedly connected with the pivot, the movable disc is connected with the pivot sliding, the inside of mounting shell is equipped with viscous liquid, a plurality of deformation flow guide structures are rotationally arranged on the fixed disc, the centre of pivot is equipped with the adjusting assembly for controlling the movable disc sliding, and the movable disc is equipped with the guide assembly, through setting resistance adjusting device, adopting the non - contact type damping design of viscous liquid and blade, no hard friction loss component, significantly reduce the equipment wear rate, prolong the life, adjusting assembly and guide assembly can accurate drive blade rotation simultaneously, change blade and viscous liquid's contact angle, area and fluid mechanics posture, realize the delicate adjustment of resistance, can satisfy the accurate resistance demand of many gears from light and soft to strong.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to an elliptical machine resistance adjustment device. Background Technology

[0002] Elliptical trainers, also known as space walkers, are popular among users and professionals alike as they are highly effective for cardiovascular exercise. Their incline design, adjustable resistance, choreographed exercise patterns, and ability to specifically target lower limb muscles make them a common piece of exercise equipment in professional gyms and home living rooms.

[0003] A resistance adjustment device for an elliptical trainer, disclosed in Chinese Patent Publication No. CN223082181U, allows for adjustment of the flywheel resistance by bringing a static friction plate into contact with a dynamic friction plate, utilizing friction to adjust the flywheel resistance and thus adapting to different user needs. However, based on existing elliptical trainer resistance adjustment devices and related technologies, the friction-based resistance adjustment devices used in current elliptical trainers suffer significant physical wear due to prolonged contact and friction. As usage increases, the friction plate thickness gradually decreases, leading to a sharp decline in resistance stability. At the same resistance level, a new machine exhibits uniform resistance, while an older machine may experience fluctuating resistance. Therefore, the friction plate is a consumable part requiring frequent replacement, increasing operating costs. Furthermore, friction-based resistance adjustment relies on changes in the pressure or contact area of ​​the friction plate, typically employing a stepped adjustment mechanism, making stepless and precise adjustment difficult. Users often experience sudden resistance changes when switching resistance levels, hindering the ability to finely adjust exercise intensity according to their needs. This affects both the scientific nature of training and the smoothness of the exercise experience. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide an elliptical machine resistance adjustment device.

[0005] The objective of this utility model is achieved through the following technical solution: an elliptical machine resistance adjustment device, comprising a mounting frame, on which two individually swinging push rods are rotatably mounted, and foot pedals are hinged to the bottom ends of the two push rods; and a resistance adjustment device disposed at the tail end of the mounting frame, the resistance adjustment device comprising a mounting shell fixedly mounted at the tail end of the mounting frame, a rotating shaft rotatably mounted at the center of the mounting shell, a fixed plate and a moving plate rotatably mounted inside the mounting shell, the fixed plate being fixedly connected to the rotating shaft, and the moving plate being slidably connected to the rotating shaft; a viscous liquid is disposed inside the mounting shell; multiple deformation-guided structures that rotatably contact the viscous liquid are mounted on the fixed plate; an adjustment component for controlling the sliding of the moving plate is disposed at the center of the rotating shaft; multiple guide components for adjusting the contact area between the multiple deformation-guided structures and the viscous liquid as the moving plate slides; and two foot pedals are connected to the rotating shaft via connecting rods.

[0006] Preferably, the deformation guiding structure includes a movable shaft rotatably connected to the fixed disk, and a blade is fixedly provided at the end of the movable shaft away from the moving disk.

[0007] Preferably, the guide assembly includes a fixed shaft fixedly disposed on the end face of the movable disk, the fixed shaft being positioned corresponding to the movable shaft, the movable shaft having an insertion hole at one end facing the fixed shaft, the end of the fixed shaft being inserted into the insertion hole, the inner wall of the insertion hole having multiple curved grooves, and the outer surface of the fixed shaft having balls that fit against the groove walls at positions corresponding to the multiple curved grooves.

[0008] Preferably, a sleeve is fixedly provided at the center of the moving plate, and two sliders are symmetrically fixedly provided on the inner wall of the sleeve, with a fixing ring fixedly installed between the two sliders.

[0009] Preferably, the rotating shaft is a hollow shaft with an opening at one end, the fixing ring is slidably disposed inside the rotating shaft, and the rotating shaft has a groove that matches the position of each of the two sliders, and the length of the sleeve is greater than the length of the groove.

[0010] Preferably, the adjusting assembly includes a lead screw threadedly connected to the rotating shaft, the lead screw being coaxial with the rotating shaft, a ruler fixedly mounted at one end of the lead screw facing the opening of the rotating shaft, a knob fixedly mounted at the other end of the lead screw away from the ruler, the knob being located on the outside of the rotating shaft, and the lead screw being rotatably connected to the fixing ring.

[0011] Preferably, one end of the connecting rod is hinged to the foot pedal structure, and the other end of the connecting rod is fixedly connected to the rotating shaft.

[0012] The beneficial effects of this elliptical machine resistance adjustment device are as follows: By setting up the resistance adjustment device, a non-contact damping design between the viscous liquid and the blades is adopted, eliminating hard friction and wear parts, significantly reducing the wear rate of the equipment and extending its service life. At the same time, the adjustment component and the guide component can precisely drive the blade rotation, changing the contact angle, area and hydrodynamic posture between the blade and the viscous liquid, achieving fine adjustment of resistance. Compared with the coarse adjustment of the traditional friction disc, it can meet the precise resistance requirements of multiple levels from gentle to strong. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the mounting shell of this utility model; Figure 3 This is a first-view structural schematic diagram of the rotating shaft of this utility model; Figure 4 This is a structural schematic diagram of the rotating shaft of this utility model from a second perspective; Figure 5 This is a structural schematic diagram of the rotating shaft of this utility model from a third-view perspective; Figure 6 This is a schematic diagram of the internal structure of the rotating shaft of this utility model; Figure 7 This utility model Figure 6 Enlarged structural diagram at point A; Figure 8 This is a schematic diagram showing the disassembled structure of the deformation-guided flow structure and the guiding component of this utility model; Figure 9 This is a schematic diagram showing the maximum drag state of the blade of this utility model; Figure 10 This is a schematic diagram of the blade of this utility model under moderate resistance conditions; Figure 11 This is a schematic diagram of the minimum resistance state of the blade of this utility model.

[0015] In the diagram: 1. Mounting bracket; 2. Push rod; 3. Foot pedal structure; 4. Mounting housing; 5. Rotating shaft; 501. Slide groove; 6. Fixed plate; 7. Moving plate; 701. Sleeve; 702. Slider; 703. Fixed ring; 8. Deformation guide structure; 801. Movable shaft; 8011. Insertion hole; 8012. Curved groove; 802. Blade; 9. Adjustment component; 901. Lead screw; 902. Ruler; 903. Knob; 10. Guide component; 1001. Fixed shaft; 1002. Ball bearing; 11. Connecting rod. Detailed Implementation

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, in part of which will be obvious from the description or may be learned by practice of the invention.

[0018] like Figures 1 to 11As shown, an elliptical machine resistance adjustment device includes a mounting frame 1 with two independently swinging push rods 2 rotatably mounted on it. Each push rod 2 has a foot pedal structure 3 hinged to its bottom end. The device also includes a resistance adjustment mechanism located at the tail end of the mounting frame 1. The resistance adjustment mechanism includes a mounting shell 4 fixedly mounted at the tail end of the mounting frame 1. A rotating shaft 5 is rotatably mounted at the center of the mounting shell 4. A fixed plate 6 and a moving plate 7 are rotatably mounted inside the mounting shell 4. The fixed plate 6 is fixedly connected to the rotating shaft 5, and the moving plate 7 is slidably connected to the rotating shaft 5. A viscous liquid is placed inside the mounting shell 4. A rotating hole is provided in the mounting shell 4 corresponding to the position of the rotating shaft 5. The rotating shaft 5 is connected to the rotating hole via a sealed bearing. By utilizing the aforementioned bearing, the friction and stability of the rotating shaft 5 during rotation can be reduced, and resistance can be prevented from increasing. The viscous liquid inside the housing 4 flows out freely; the fixed plate 6 is equipped with multiple deformation guide structures 8 that rotatably contact the viscous liquid; the center of the rotating shaft 5 is equipped with an adjustment component 9 for controlling the sliding of the moving plate 7; the moving plate 7 is equipped with multiple guide components 10 for adjusting the contact area between the multiple deformation guide structures 8 and the viscous liquid as it slides (for example, the viscous liquid is machine oil, and a non-contact damping design between the oil and the deformation guide structure 8 is adopted, with no hard friction loss parts, significantly reducing the wear rate of the equipment and extending its service life; at the same time, it reduces the maintenance cost and downtime maintenance frequency caused by friction wear, making it more worry-free to use); both foot pedal structures 3 are connected to the rotating shaft 5 through a connecting rod 11, one end of the connecting rod 11 is hinged to the foot pedal structure 3, and the other end of the connecting rod 11 is fixedly connected to the rotating shaft 5.

[0019] like Figure 2 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, the deformation guide structure 8 includes a movable shaft 801 rotatably connected to the fixed plate 6 (the fixed plate 6 has rotating holes at the positions corresponding to the multiple movable shafts 801, and the movable shafts 801 are connected to the rotating holes through bearings, thereby reducing the friction force when the movable shafts 801 rotate and improving the stability of the movable shafts 801 during rotation). A blade 802 is fixedly provided at the end of the movable shaft 801 away from the moving plate 7; the guide assembly 10 includes a fixed shaft 1001 fixedly provided on the end face of the moving plate 7, the fixed shaft 1001 is positioned corresponding to the movable shaft 801, and the end of the movable shaft 801 facing the fixed shaft 1001. The fixed shaft 1001 has an insertion hole 8011, and the end of the fixed shaft 1001 is inserted into the insertion hole 8011. The inner wall of the insertion hole 8011 has multiple curved grooves 8012. The outer surface of the fixed shaft 1001 is provided with balls 1002 that fit against the groove walls at the positions corresponding to the multiple curved grooves 8012. The dynamic adjustment of the blade angle can significantly change the damping effect of the oil on the blade 802, making the resistance adjustment range wider and improving the linearity and stability of the resistance adjustment. It can maintain smooth force feedback at different resistance levels, providing users with a more uniform and controllable motion experience, and adapting to the physical fitness level and training goals of different users.

[0020] like Figure 2 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, a sleeve 701 is fixedly installed at the center of the moving plate 7. Two sliders 702 are symmetrically fixedly installed on the inner wall of the sleeve 701. A sealing layer is fixedly installed inside the sleeve 701, thereby preventing viscous liquid from entering the interior of the rotating shaft 5. A retaining ring 703 is fixedly installed between the two sliders 702. The rotating shaft 5 is a hollow shaft with an opening at one end. The retaining ring 703 is slidably installed inside the rotating shaft 5. The rotating shaft 5 has grooves 501 that are adapted to the positions of the two sliders 702. The length of the sleeve 701 is greater than the length of the groove 501. The adjusting component 9 includes a screw threadedly connected to the rotating shaft 5. Rod 901, lead screw 901 is coaxial with rotating shaft 5. A ruler 902 is fixedly mounted on one end of lead screw 901 facing the opening of rotating shaft 5, and a knob 903 is fixedly mounted on the other end of lead screw 901 away from ruler 902. Knob 903 is located on the outside of rotating shaft 5. Lead screw 901 is rotatably connected to fixed ring 703 (the inner wall of fixed ring 703 is inlaid with a bearing, and lead screw 901 is inserted into the inner ring of the bearing, thus utilizing the aforementioned bearing to allow lead screw 901 to rotate, controlling the fixed ring 703 to slide inside rotating shaft 5, and then controlling the movement of moving disc 7 through two sliders 702 and a sleeve 701). Figures 6 to 11As shown, by rotating the screw 901 via the knob 903, the moving plate 7 slides on the outer surface of the rotating shaft 5, which can precisely drive the blade 802 to rotate, changing the contact angle, area and hydrodynamic posture of the blade 802 with the oil, thus achieving fine adjustment of resistance. Compared with the coarse adjustment of the traditional friction disc, it can meet the needs of multiple levels of precise resistance from gentle to strong. At the same time, the adjustment component 9 is equipped with a ruler 902, which allows users to intuitively read and accurately adjust the resistance level from outside the device without disassembling the equipment or relying on experience. The operation threshold is low, which improves the convenience and repeatability of resistance adjustment.

[0021] The work process is as follows: S1: When in use, the reciprocating swing of the push rod 2 is used to control the two foot pedal structures 3 to perform elliptical motion; S2: When the two foot pedal structures 3 are in elliptical motion, the connecting rod 11 will cause the rotating shaft 5 to rotate circumferentially. At this time, the fixed plate 6 and the moving plate 7 will rotate synchronously with the rotating shaft 5. S3: When the fixed plate 6 rotates, the multiple blades 802 on the fixed plate 6 will come into contact with the viscous liquid, thereby applying resistance to the rotation of the rotating shaft 5, and thus indirectly applying resistance to the elliptical motion of the two foot pedal structures 3. S4: When it is necessary to adjust the resistance, rotate the screw 901 by turning the knob 903 to make the moving plate 7 slide on the outer surface of the rotating shaft 5; S5: When the moving disc 7 slides on the outer surface of the rotating shaft 5, the fixed shaft 1001 will slide axially inside the insertion hole 8011. Then, by utilizing the cooperation between the set ball 1002 and the curved groove 8012, the moving shaft 801 can drive the blade 802 to rotate circumferentially, thereby changing the contact angle, area and hydrodynamic posture of the blade 802 with the oil, achieving fine adjustment of resistance. Compared with the coarse adjustment of the traditional friction disc, it can meet the multi-level precise resistance requirements from gentle to strong.

[0022] The mounting bracket 1, push rod 2, foot pedal structure 3, connecting rod 11, sealed bearing, bearing and sealing layer described in this application are all known technologies, therefore their specific structures and working principles are not described in detail.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An elliptical trainer resistance adjustment device, comprising a mounting frame (1), wherein two independently swinging push rods (2) are rotatably mounted on the mounting frame (1), and the bottom ends of the two push rods (2) are hinged to a foot pedal structure (3), characterized in that: It also includes a resistance adjustment device disposed at the tail end of the mounting frame (1). The resistance adjustment device includes a mounting shell (4) fixedly installed at the tail end of the mounting frame (1). A rotating shaft (5) is rotatably disposed at the center of the mounting shell (4). A fixed plate (6) and a moving plate (7) are rotatably disposed inside the mounting shell (4). The fixed plate (6) is fixedly connected to the rotating shaft (5). The moving plate (7) is slidably connected to the rotating shaft (5). A viscous liquid is disposed inside the mounting shell (4). The fixed plate (6) is provided with multiple deformation guide structures (8) that come into contact with the viscous liquid. The center of the rotating shaft (5) is provided with an adjustment component (9) for controlling the sliding of the moving plate (7). The moving plate (7) is provided with multiple guide components (10) for adjusting the contact area between the multiple deformation guide structures (8) and the viscous liquid as it slides. Both foot pedal structures (3) are connected to the rotating shaft (5) through a connecting rod (11).

2. The elliptical machine resistance adjustment device according to claim 1, characterized in that: The deformation guide structure (8) includes a movable shaft (801) rotatably connected to the fixed disk (6), and a blade (802) is fixedly provided at one end of the movable shaft (801) away from the moving disk (7).

3. The elliptical machine resistance adjustment device according to claim 2, characterized in that: The guide assembly (10) includes a fixed shaft (1001) fixedly disposed on the end face of the movable disk (7). The fixed shaft (1001) is positioned opposite to the movable shaft (801). The movable shaft (801) has an insertion hole (8011) at one end facing the fixed shaft (1001). The end of the fixed shaft (1001) is inserted into the insertion hole (8011). The inner wall of the insertion hole (8011) has multiple curved grooves (8012). The outer surface of the fixed shaft (1001) is provided with balls (1002) that fit against the groove wall at the positions corresponding to the multiple curved grooves (8012).

4. The elliptical machine resistance adjustment device according to claim 1, characterized in that: A sleeve (701) is fixedly provided at the center of the moving plate (7), and two sliders (702) are symmetrically fixed on the inner wall of the sleeve (701). A fixing ring (703) is fixedly installed between the two sliders (702).

5. The elliptical machine resistance adjustment device according to claim 4, characterized in that: The rotating shaft (5) is a hollow shaft with an opening at one end. The fixing ring (703) is slidably disposed inside the rotating shaft (5). The rotating shaft (5) has a groove (501) that matches the position of each of the two sliders (702). The length of the sleeve (701) is greater than the length of the groove (501).

6. The elliptical trainer resistance adjustment device according to claim 5, characterized in that: The adjusting assembly (9) includes a lead screw (901) threadedly connected to the rotating shaft (5). The lead screw (901) is coaxial with the rotating shaft (5). A ruler (902) is fixedly provided at one end of the lead screw (901) facing the opening of the rotating shaft (5). A knob (903) is fixedly provided at the other end of the lead screw (901) away from the ruler (902). The knob (903) is located on the outside of the rotating shaft (5). The lead screw (901) is rotatably connected to the fixing ring (703).

7. The elliptical trainer resistance adjustment device according to claim 1, characterized in that: One end of the connecting rod (11) is hinged to the foot pedal structure (3), and the other end of the connecting rod (11) is fixedly connected to the rotating shaft (5).

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