A stepless adjustment structure based on a fitness machine

Abstract

The utility model discloses a kind of stepless adjusting structure based on body-building machine, it is related to body-building equipment technical field, including: support plate, vertical fixed setting is on body-building machine;Support frame, be provided with two, respectively fixed in the upper and lower ends of the support plate;Driving mechanism, between two the support frame is equipped, for driving lifting movement, including the stepper motor for driving slider to move up and down along support plate and the screw block transmission assembly connected with it;Slider, along the vertical direction of the support plate sliding is set, and with the driving mechanism transmission connection;Pulley assembly, set up in the side wall of the slider, for body-building machine pull rope to be set and change pull rope guiding path, with compact structure, transmission reliable, adjust continuous stable, adapt different height user, and can automatically adapt the advantages of pull rope outlet angle change.

Description

Technical Field

[0001] This utility model belongs to the field of fitness equipment technology, and more specifically it relates to a stepless adjustment structure based on a fitness machine. Background Technology

[0002] In existing fitness equipment, especially strength training equipment with rope structures (such as gantry cranes, pulley resistance bands, multi-functional training machines, etc.), the guide pulleys for the ropes are usually fixed in place.

[0003] Although this type of fixed pulley mechanism has a simple structure and low manufacturing cost, its pull rope outlet height is fixed and cannot be adjusted according to the user's height or training posture.

[0004] When users have significant differences in height, a fixed-height pull rope outlet can lead to uncomfortable training postures, unnatural force application angles, and even uneven stress on joints, thereby affecting training effectiveness and safety.

[0005] In addition, in order to change the height of the pull rope outlet, some equipment adopts a mechanical pin-type adjustment mechanism. Although it can switch between multiple fixed positions, it cannot achieve continuous and smooth adjustment, and the structure is complex and inconvenient to operate.

[0006] Moreover, traditional pulley components are mostly fixed installations, which can easily cause problems such as uneven wear and jamming when the rope angle changes significantly, affecting the pulley's lifespan and training experience.

[0007] Therefore, there is an urgent need for a stepless adjustment structure based on fitness machines to solve the above problems. Utility Model Content

[0008] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a stepless adjustment structure based on a fitness machine, which has the advantages of compact structure, reliable transmission, continuous and stable adjustment, adaptability to users of different heights, and automatic adaptation to changes in the angle of the pull rope.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A stepless adjustment structure based on a fitness machine includes: a support plate, vertically fixed on the fitness machine; two support frames, respectively fixed to the upper and lower ends of the support plate; a drive mechanism, located between the two support frames, for driving lifting motion, including a stepper motor for driving a slider to move up and down along the support plate and a lead screw slider transmission assembly connected thereto; a slider, slidably arranged along the vertical direction of the support plate and connected to the drive mechanism; and a pulley assembly, located on one side wall of the slider, for allowing the fitness machine pull rope to pass through and changing the guide path of the pull rope.

[0011] The advantages of this solution are at least as follows: Addressing the problem of fixed and inconvenient adjustment of the pull rope guide height in existing fitness machines, this solution uses a stepper motor-driven screw-slider transmission mechanism, allowing the slider to move steplessly up and down along the support plate, thus achieving continuous height adjustment of the pulley assembly. By replacing the manual pin-type adjustment method with a motor-driven mechanism, the manual insertion and removal steps are eliminated, resulting in a compact structure and high adjustment precision. This allows for automatic adjustment of the pull rope guide height according to different training postures and user height, improving the fitness machine's applicability and ease of use.

[0012] The present invention is further configured such that: the lead screw and slider transmission assembly includes: a lead screw connected to the output shaft of the stepper motor and a nut block threadedly engaged with the lead screw, and the slider is fixedly connected to the nut block.

[0013] The advantages of this scheme are at least as follows: by fixing the slider to the nut block that is threaded with the lead screw, the motor rotation drives the lead screw to rotate, thereby making the nut block and slider rise and fall smoothly; the lead screw transmission structure ensures the smoothness and positioning accuracy of the adjustment process, avoids the phenomenon of sliding and jamming, and has the advantages of reliable structure and high transmission efficiency.

[0014] The present invention is further configured such that: the pulley assembly includes a mounting box and at least one movable pulley disposed in the mounting box; the slider is provided with two brackets; and the mounting box is rotatably mounted between the brackets on the slider.

[0015] The advantages of this solution are at least as follows: In response to the problems of the non-adjustable guide angle of the pull rope and the easy wear of the pull rope in the existing technology, this solution sets a bracket on the slider and rotates the mounting box and movable pulley between the brackets, so that the pulley assembly can automatically swing with the fine adjustment of the pull rope angle; the friction between the pull rope and the pulley is reduced by the rotating connection structure, which improves the smoothness of use and the life of the components.

[0016] The present invention is further configured such that: two movable pulleys are provided inside the mounting box, and the two movable pulleys are arranged at intervals in the vertical direction.

[0017] The advantages of this scheme are at least as follows: by setting two vertically spaced movable pulleys in the mounting box, the rope can be guided by pulleys of different heights according to the training part; the double movable pulley structure can not only distribute the force and improve the direction of the force on the rope, but also improve the smoothness and safety during training.

[0018] The present invention is further configured such that: a guide component is provided on the support plate along the moving direction of the slider, and a guide block is provided on the slider to slide in cooperation with the guide component.

[0019] The advantages of this scheme are at least as follows: In actual use, the slider may deviate during its up-and-down movement. By setting a guide component on the support plate along the slider's movement direction and setting a guide block on the slider to cooperate with it, the lateral sway of the slider is effectively limited through the guide cooperation. This ensures the stability and guiding accuracy of the slider during the lifting and lowering process, and improves the operational reliability of the overall structure.

[0020] The present invention is further configured such that: the guide component is a dovetail-shaped guide rail, and the bottom of the guide block is provided with a dovetail-shaped groove that matches the dovetail-shaped guide rail.

[0021] The advantages of this scheme are at least as follows: the guide components and guide blocks adopt a dovetail guide rail and dovetail groove matching structure, which makes the guide contact surface large and the fit tight, effectively preventing the slider from shaking and falling off. Moreover, the dovetail structure can achieve high-precision guidance while also being disassembled and installed, which is convenient for assembly and maintenance.

[0022] The present invention is further configured such that the mounting box is rotatably connected to the bracket via a rotating shaft.

[0023] The advantages of this scheme are at least as follows: by rotating the mounting box and the bracket through the pivot, the pulley assembly can swing flexibly and has good support stability, which indirectly improves the durability and adjustment flexibility of the pulley assembly.

[0024] The present invention is further configured such that the stepper motor and the lead screw are connected by a flexible coupling.

[0025] The advantages of this solution are at least as follows: Addressing the issue of eccentricity and vibration caused by a direct rigid connection between the motor and the lead screw, a flexible coupling connects the stepper motor and the lead screw, effectively absorbing installation deviations and transmission impacts; thereby improving transmission smoothness and extending the service life of the motor and lead screw.

[0026] The present invention is further configured such that: a control component is provided on one side of the support plate for controlling the forward and reverse rotation of the stepper motor, and the control component is electrically connected to the stepper motor through a wire.

[0027] The advantages of this scheme are at least as follows: when dealing with users of different heights, the user can control the forward and reverse rotation of the stepper motor through the control group, thereby realizing the electronic operation of the lifting action.

[0028] The present invention is further configured such that the control component includes a raise switch and a lower switch.

[0029] The advantages of this solution are at least as follows: by setting up raise and lower switches in the control component, users can raise or lower the rope pulley assembly with a simple button; thus achieving one-button operation, which is convenient to use and suitable for quick switching between multiple users.

[0030] In summary, this utility model has at least the following advantages:

[0031] 1. By setting a stepper motor-driven lead screw and slider transmission mechanism on the support plate, the slider can move smoothly and accurately along the vertical direction of the support plate, thereby achieving stepless adjustment of the pulley assembly height. Users only need to issue a raise or lower command through the control component to achieve automatic adjustment of the guide height, avoiding the problems of cumbersome operation, large positioning error, and inconvenience of use that exist in traditional pin-type or manual adjustment structures, and significantly improving the adaptability of the fitness machine in different training postures;

[0032] 2. By setting brackets on the slider and rotating the mounting box and movable pulleys between the brackets, the pulley assembly can automatically swing according to the direction of force on the pull rope, thus ensuring smooth guidance when the pull rope is pulled in different directions. This structure avoids the wear and resistance problems caused by excessive pull rope deflection angle in fixed pulley guidance, improving the smoothness and comfort during training. At the same time, two movable pulleys arranged vertically at intervals are set in the mounting box, allowing users to select different heights of the pull rope path according to different training programs or force directions, realizing multi-angle training modes for force output, and improving the functionality and training effect of the fitness machine.

[0033] 3. By setting up a guide component and a matching guide block on the slider, the lateral sway and offset of the slider during the lifting process can be effectively constrained, ensuring the verticality and stability of the motion trajectory. The guide component adopts a dovetail guide rail and dovetail groove structure, with a large contact surface and high guiding accuracy. This not only improves the stability and assembly accuracy of the overall structure, but also facilitates disassembly and maintenance, reduces mechanical wear during use, and extends the life of the device.

[0034] 4. By setting a control component on one side of the support plate and electrically connecting it to the stepper motor via wires, users can control the forward and reverse rotation of the motor through the control component, thereby controlling the lifting and lowering direction of the slider. The control component is equipped with a raise switch and a lower switch. The structure is simple and the operation is intuitive. Users can quickly adjust the guide position of the pull rope between different training movements, which significantly improves the convenience and adaptability of the equipment operation. Attached Figure Description

[0035] Figure 1 This is an overall schematic diagram of this embodiment;

[0036] Figure 2 for Figure 1An enlarged schematic diagram of part A in the middle;

[0037] Figure 3 This is an exploded view of the pulley assembly in this embodiment.

[0038] Reference numerals: 1. Support plate; 2. Support frame; 3. Drive mechanism; 301. Stepper motor; 302. Screw-slider transmission assembly; 3021. Screw; 3022. Nut block; 4. Slider; 401. Bracket; 5. Pulley assembly; 501. Mounting box; 502. Moving pulley; 6. Guide assembly; 7. Guide block; 8. Rotating shaft; 9. Flexible coupling; 10. Control assembly; 1001. Raise switch; 1002. Lower switch. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of this utility model and the features within them can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] Example 1

[0042] like Figure 1 As shown, a stepless adjustment structure based on a fitness machine includes a support plate 1, which is vertically fixed on the main frame of the fitness machine, serving as the load-bearing and guiding base for the entire adjustment structure. Support frames 2 are fixedly mounted at the upper and lower ends of the support plate 1 to mount and support the two ends of a drive mechanism 3. The drive mechanism 3 is located between the two support frames 2 and includes a stepper motor 301 and a lead screw-slider transmission assembly 302 connected to the output shaft of the stepper motor 301. The lead screw 3021 is connected to the stepper motor 301 via a flexible coupling 9, and the lower end of the lead screw 3021 is rotatably mounted on the lower support frame 2 via a bearing seat. A nut block 3022 is threadedly engaged with the lead screw 3021. When the stepper motor 301 rotates, the lead screw 3021 drives the nut block 3022 to move up and down along its axial direction. The slider 4 is fixedly connected to the nut block 3022, thereby enabling the slider 4 to move up and down along the vertical direction of the support plate 1.

[0043] like Figure 2As shown, in order to make the pulley assembly 5 rise and fall more smoothly, in some preferred embodiments, the slider 4 is slidably arranged along the vertical direction of the support plate 1, and one side of it cooperates with the support plate 1 through the guide assembly 6. The guide assembly 6 can adopt a dovetail guide rail structure, and the guide block 7 of the slider 4 is correspondingly provided with a dovetail groove that slides with it to ensure the stability and guiding accuracy of the slider 4 during the rising and falling process, and avoid lateral swaying and deviation. In other preferred embodiments, the guide assembly 6 can also adopt a T-shaped guide rail structure, and the slider 4 is correspondingly provided with a T-shaped groove that slides with it.

[0044] In use, the guide assembly 6 and the guide block 7 adopt a dovetail guide rail and dovetail groove matching structure, which makes the guide contact surface large and the fit tight, effectively preventing the slider 4 from shaking and falling off. Moreover, the dovetail structure can not only achieve high-precision guidance, but also be disassembled and installed, which is convenient for assembly and maintenance.

[0045] Example 2

[0046] like Figure 2 , Figure 3 As shown, a pulley assembly 5 is provided on one side wall of the slider 4. The pulley assembly 5 includes a mounting box 501 and a movable pulley 502 installed inside the mounting box 501. The mounting box 501 is rotatably mounted on the slider 4 between a pair of brackets 401 via a pivot 8, so that the pulley assembly 5 can rotate accordingly when subjected to different angles of tension from the pull rope, thereby ensuring the smoothness of the pull rope guidance and the naturalness of the force direction.

[0047] Furthermore, the installation box 501 is equipped with two movable pulleys 502, which are arranged vertically at intervals. This allows the pull rope to be guided by pulleys of different heights depending on the training area. This not only disperses the force and improves the direction of the force on the pull rope, but also enhances the smoothness and safety during training.

[0048] It is worth mentioning that the mounting box 501 is rotatably connected to the bracket 401 via the pivot 8. The pivot 8 rotatably connects the mounting box 501 to the bracket 401, allowing the pulley assembly 5 to swing flexibly and have good support stability, which indirectly improves the durability and adjustment flexibility of the pulley assembly 5. When in use, the pull rope is led out from the traction device of the fitness machine body, passes through the movable pulley 502 inside the pulley assembly 5, and is connected to the training handle after being guided by the pulley, forming a complete pull rope training system.

[0049] Example 3

[0050] like Figure 1As shown, a control component 10 is provided on one side of the support plate 1. The control component 10 includes a raise switch 1001 and a lower switch 1002. The control component 10 is electrically connected to the stepper motor 301 via wires to realize the forward and reverse rotation control of the stepper motor 301. When the user needs to adjust the height of the pull rope guide, he can directly press the raise switch 1001 or the lower switch 1002. The stepper motor 301 will then rotate forward or reverse, driving the lead screw 3021 to rotate, so that the nut block 3022 and the slider 4 rise or fall smoothly along the direction of the support plate 1. As the position of the slider 4 changes, the pulley assembly 5 installed on the slider 4 also rises and falls accordingly, thereby realizing the continuous adjustment of the pull rope guide height.

[0051] In some preferred embodiments, to prevent the slider 4 from rising or falling excessively during use, a limiting component is also provided on the support frame 2. This limiting component may include limit switches or mechanical limit blocks installed at the upper and lower ends of the support plate 1. When the slider 4 rises to its highest position or falls to its lowest position, the trigger on the slider 4 can contact the limiting component, thereby outputting a stop signal or forming a physical limit, preventing the slider 4 from exceeding its travel range and causing structural damage or safety hazards.

[0052] By controlling the settings of component 10, users can quickly adjust the height of pulley component 5 according to different training movements (such as seated rows, standing lat pulldowns, side pulls, etc.), ensuring that the cable exit angle is always within the most suitable range of force direction, thus improving training comfort and movement stability. Furthermore, the adjustment process requires no disassembly or manual insertion / removal of positioning pins, offering high adjustment precision and simple operation, meeting the needs of users of different heights and training body parts.

[0053] The working process and beneficial effects of this utility model:

[0054] The user first selects the appropriate rope exit height according to the training project, and then controls the stepper motor 301 to rotate via the raise or lower switch 1002 in the control component 10. The stepper motor 301 drives the lead screw 3021 to rotate via the flexible coupling 9, causing the nut block 3022 with its threaded engagement and the slider 4 connected to it to move smoothly along the vertical direction of the support plate 1. The pulley assembly 5 on the slider 4 rises and falls accordingly, thereby realizing continuous height adjustment of the rope exit point.

[0055] When the pull rope is pulled in different directions, the mounting box 501 in the pulley assembly 5 will rotate slightly around the pivot 8 to automatically adapt to the pull rope's exit angle, so that the pull rope always maintains a natural tension state, avoiding uneven wear and jamming. Moreover, the user can adjust the pulley height in real time according to the needs of the movement during training, without disassembly or pin positioning. The operation is convenient and the adjustment is highly accurate, avoiding the problems of cumbersome operation, large positioning error and inconvenience of traditional pin-type or manual adjustment structures, which significantly improves the adaptability of the fitness machine in different training postures.

[0056] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0057] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A stepless adjustment structure based on a fitness machine, characterized in that, include: The support plate (1) is vertically fixed on the fitness machine; There are two support frames (2), which are fixed to the upper and lower ends of the support plate (1) respectively; The drive mechanism (3) is located between the two support frames (2) and is used to drive the lifting motion. It includes a stepper motor (301) for driving the slider (4) to move up and down along the support plate (1) and a lead screw slider transmission assembly (302) connected thereto. The slider (4) is slidably disposed along the vertical direction of the support plate (1) and is connected to the drive mechanism (3) for transmission. The pulley assembly (5) is located on one side wall of the slider (4) and is used for the fitness machine pull rope to pass through and change the guide path of the pull rope.

2. The stepless adjustment structure according to claim 1, characterized in that: The lead screw and slider transmission assembly (302) includes: a lead screw (3021) connected to the output shaft of the stepper motor (301) and a nut block (3022) threadedly engaged with the lead screw (3021), and the slider (4) is fixedly connected to the nut block (3022).

3. The stepless adjustment structure according to claim 1, characterized in that: The pulley assembly (5) includes a mounting box (501) and at least one movable pulley (502) disposed in the mounting box (501). The slider (4) is provided with two brackets (401), and the mounting box (501) is rotatably mounted between the brackets (401) on the slider (4).

4. The stepless adjustment structure according to claim 3, characterized in that: The mounting box (501) is provided with two movable pulleys (502), which are arranged at intervals in the vertical direction.

5. The stepless adjustment structure according to claim 1, characterized in that: The support plate (1) is provided with a guide component (6) along the moving direction of the slider (4), and the slider (4) is provided with a guide block (7) that slides with the guide component (6).

6. The stepless adjustment structure according to claim 5, characterized in that: The guide component (6) is a dovetail-shaped guide rail, and the bottom of the guide block (7) is provided with a dovetail-shaped groove that matches the dovetail-shaped guide rail.

7. The stepless adjustment structure according to claim 3, characterized in that: The mounting box (501) is rotatably connected to the bracket (401) via a rotating shaft (8).

8. The stepless adjustment structure according to claim 2, characterized in that: The stepper motor (301) and the lead screw (3021) are connected by a flexible coupling (9).

9. The stepless adjustment structure according to claim 1, characterized in that: The support plate (1) is also provided with a control component (10) on one side, which is used to control the stepper motor (301) to rotate in both directions. The control component (10) is electrically connected to the stepper motor (301) through a wire.

10. The stepless adjustment structure according to claim 1, characterized in that: The control component (10) includes a raise switch (1001) and a lower switch (1002).

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