A fitness machine based on motor controlled force
By using closed-loop control of servo motors and force sensors, the problem of inaccurate force adjustment in traditional fitness equipment has been solved, enabling personalized resistance adjustment of the fitness equipment and improving the scientific nature and effectiveness of fitness training.
Patent Information
- Application Number
- CN202521920132.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-08
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-08
AI Technical Summary
Traditional fitness equipment, which adjusts strength through weight blocks, is not precise enough to meet the precise strength requirements of different fitness enthusiasts.
A closed-loop control method combining a servo motor and a force sensor is adopted to precisely adjust the resistance. Parameters can be set through a human-machine interface touch screen to achieve consistency between the resistance and the user-set value.
It enables personalized strength adjustments for users with different fitness levels, improving the scientific nature and effectiveness of training.
Smart Images

Figure CN224672001U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fitness equipment technology, specifically a fitness device based on motor-controlled force. Background Technology
[0002] With increasing health awareness, fitness has become an indispensable part of many people's lives. As an important tool for fitness, the performance of fitness equipment directly affects the fitness results.
[0003] Currently, most traditional fitness equipment uses counterweights to adjust strength. This method has many drawbacks. The strength adjustment is not precise and it is difficult to meet the precise needs of different fitness users for different strength levels. Therefore, those skilled in the art have provided a fitness equipment based on motor-controlled strength to solve the problems mentioned in the background art. Utility Model Content
[0004] The purpose of this invention is to provide a fitness device based on motor-controlled force to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A fitness device based on motor-controlled force includes a frame. Two sets of support columns are connected to the upper surface of the frame. Fixed rods are connected to the sides of the two sets of support columns that are close to each other. Guide wheels are connected to the outer surfaces of the two fixed rods. A drive box is connected to the upper surface of the frame. A through groove is formed on the upper surface of the drive box. A servo motor is installed on the inner wall of the drive box. A first rotating bearing is embedded in the inner wall of the drive box. A first connecting rod is connected to the inner ring of the first rotating bearing. One end of the first connecting rod is connected to the output end of the servo motor. Two second rotating bearings are embedded in the inner wall of the drive box. The inner rings of the two second rotating bearings are connected to a second connecting rod. Gears are connected to the outer rings of both the first and second connecting rods. The outer surfaces of the two gears mesh. A force sensor is connected to the outer surface of the second connecting rod. A connecting rope is wound around the outer ring of the second connecting rod. One end of the connecting rope is connected to a handle.
[0006] As a further improvement of this utility model: a seat is connected to the upper surface of the frame, and a cushion is connected to the inner side wall of the frame.
[0007] As a further improvement of this utility model: the inner bottom wall of the drive box is connected to a reinforcing base, and the upper surface of the reinforcing base is connected to the outer surface of the servo motor.
[0008] As a further improvement of this utility model: a heat dissipation window is provided on the left side of the drive box, and a filter screen is connected inside the heat dissipation window.
[0009] As a further improvement of this utility model: each of the two sets of support columns is connected to an X-shaped connecting frame on one side that is close to each other, and the X-shaped connecting frame is made of aluminum alloy.
[0010] As a further improvement of this utility model: a control box is installed on the upper surface of the frame, and a human-machine interactive touch screen is installed on the right side of the control box.
[0011] As a further improvement of this utility model: a buzzer is installed on the front of the control box, and two status indicator lights are installed on the upper surface of the control box.
[0012] As a further improvement of this utility model: positioning plates are connected to both the left and right sides of the frame, and a set of positioning holes are opened inside the two positioning plates.
[0013] Compared with the prior art, the beneficial effects of this utility model are: This type of fitness machine, based on motor-controlled force, uses a closed-loop control method combining a servo motor and a force sensor. It can precisely adjust the resistance according to the user's settings and respond quickly. It can meet the personalized strength needs of users at different fitness levels. It can be adapted to both low-resistance training for beginners and high-intensity training for professional fitness enthusiasts, improving the scientific nature and effectiveness of training. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of a fitness device based on motor-controlled force. Figure 2 A top view of a fitness machine based on motor-controlled force; Figure 3 This is a side sectional view of a fitness device based on motor-controlled force. Figure 4 A cross-sectional view of a fitness device based on motor-controlled force. Figure 5 This is a top sectional view of a fitness device based on motor-controlled force.
[0015] In the diagram: 1. Frame; 2. Support column; 3. Fixing rod; 4. Guide wheel; 5. Drive box; 6. Through slot; 7. Servo motor; 8. First rotating bearing; 9. First connecting rod; 10. Second rotating bearing; 11. Second connecting rod; 12. Gear; 13. Force sensor; 14. Connecting rope; 15. Handle; 16. Seat; 17. Cushion; 18. Reinforcing seat; 19. Heat dissipation window; 20. X-shaped connecting frame; 21. Control box; 22. Human-machine interface touch screen; 23. Buzzer; 24. Status indicator light; 25. Positioning plate; 26. Positioning hole. Detailed Implementation
[0016] Please see Figures 1-5 In this embodiment of the invention, a fitness device based on motor-controlled force includes a frame 1. Two sets of support columns 2 are connected to the upper surface of the force sensor frame 1. Each set of force sensor support columns 2 has a fixing rod 3 connected to its adjacent side. Guide wheels 4 are connected to the outer surfaces of the two force sensor fixing rods 3. A drive box 5 is connected to the upper surface of the force sensor frame 1. A through groove 6 is formed on the upper surface of the force sensor drive box 5. A servo motor 7 is installed on the inner wall of the force sensor drive box 5. A first rotating bearing 8 is embedded in the inner wall of the force sensor drive box 5. A first connecting rod 9 is connected to the inner ring of the first rotating bearing 8. One end of the first connecting rod 9 is connected to the output end of the servo motor 7. The force sensor drive box 5... Two second rotating bearings 10 are embedded in the inner wall. The inner rings of the two force sensor second rotating bearings 10 are connected to a second connecting rod 11. Gears 12 are connected to the outer rings of the first connecting rod 9 and the second connecting rod 11. The outer surfaces of the two force sensor gears 12 mesh with each other. A force sensor 13 is connected to the outer surface of the second connecting rod 11. A connecting rope 14 is wound around the outer ring of the second connecting rod 11. One end of the force sensor connecting rope 14 is connected to a handle 15. By integrating multiple functions such as force adjustment, status monitoring, and human-computer interaction, it can not only meet the basic fitness training needs, but also help users grasp the training progress, formulate more reasonable fitness plans, and improve fitness results through data feedback.
[0017] A seat 16 is connected to the upper surface of the force sensor frame 1, and a cushion 17 is connected to the inner side wall of the force sensor frame 1. A reinforcing base 18 is connected to the inner bottom wall of the force sensor drive box 5. The upper surface of the force sensor reinforcing base 18 is connected to the outer surface of the servo motor 7. A heat dissipation window 19 is provided on the left side of the force sensor drive box 5. A filter screen is connected inside the force sensor heat dissipation window 19. The seat 16 and cushion 17 on the frame 1 provide comfortable support for the user and reduce fatigue during exercise. The reinforcing base 18 can support and reinforce the servo motor 7, which can make the servo motor 7 run more stably. The heat dissipation window 19 can dissipate the heat generated inside the drive box 5 in a timely manner.
[0018] Two sets of force sensor support columns 2 are each connected to an X-shaped connecting frame 20 on their adjacent sides. The force sensor X-shaped connecting frame 20 is made of aluminum alloy. A control box 21 is installed on the upper surface of the force sensor frame 1. A human-machine interface touch screen 22 is installed on the right side of the force sensor control box 21. A buzzer 23 is installed on the front of the force sensor control box 21. Two status indicator lights 24 are installed on the upper surface of the force sensor control box 21. Positioning plates 25 are connected to both sides of the force sensor frame 1. Each of the two force sensor positioning plates 25 has a set of positioning holes 26. The use of aluminum alloy for the X-shaped connecting frame 20 enhances the structural strength and stability of the support column 2 while reducing the overall weight of the equipment. The human-machine interface touch screen 22 allows users to easily set training parameters. At the same time, the status indicator lights 24 and the buzzer 23 provide timely feedback on the equipment's operating status and training reminders, improving the ease of operation. The cooperation of the positioning plates 25 and the positioning holes 26 facilitates fixing the equipment to the ground and prevents the equipment from shifting during training.
[0019] The working principle of this utility model is as follows: When using this device, the user sets the required resistance parameters through the human-machine interaction touch screen 22 of the control box 21. The control box 21 transmits the instructions to the servo motor 7 in the drive box 5. After the servo motor 7 starts, its output end drives the first connecting rod 9 to rotate. Since the gears 12 on the first connecting rod 9 and the second connecting rod 11 mesh with each other, the rotation of the first connecting rod 9 will drive the second connecting rod 11 to rotate synchronously. When the second connecting rod 11 rotates, the connecting rope 14 wrapped around its outer ring will be tightened and loosened accordingly. The user holds the handle 15 at the end of the connecting rope 14 to perform stretching or relaxing actions, thereby completing the fitness training. During this process, the force sensor 13 on the second connecting rod 11 monitors the tension on the connecting rope 14 in real time and feeds the data back to the control box 21. The control box 21 dynamically adjusts the output power of the servo motor 7 according to the preset parameters and the feedback from the force sensor 13 to ensure that the actual resistance is consistent with the user's set value, thereby achieving precise force control. The above is the complete operation process of this device.
[0020] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalent elements of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A fitness device based on motor-controlled force, characterized in that, Includes a frame (1), the upper surface of which is connected to two sets of support columns (2), and the two sets of support columns (2) are connected to a fixing rod (3) on the side of each set of support columns (2) that are close to each other. The outer surfaces of the two fixing rods (3) are connected to guide wheels (4). The upper surface of the frame (1) is connected to a drive box (5), and the upper surface of the drive box (5) is provided with a through groove (6). A servo motor (7) is installed on the inner side wall of the drive box (5), and a first rotating bearing (8) is embedded in the inner side wall of the drive box (5). The inner ring of the first rotating bearing (8) is connected to a first connecting rod (9). The first connecting rod (9) One end of the drive box (5) is connected to the output end of the servo motor (7). The inner wall of the drive box (5) is inlaid with two second rotating bearings (10). The inner rings of the two second rotating bearings (10) are connected to a second connecting rod (11). The outer rings of the first connecting rod (9) and the outer rings of the second connecting rod (11) are both connected to gears (12). The outer surfaces of the two gears (12) mesh with each other. The outer surface of the second connecting rod (11) is connected to a force sensor (13). The outer ring of the second connecting rod (11) is wrapped with a connecting rope (14). One end of the connecting rope (14) is connected to a handle (15).
2. The fitness device based on motor-controlled force according to claim 1, characterized in that, A seat (16) is connected to the upper surface of the frame (1), and a cushion (17) is connected to the inner side wall of the frame (1).
3. A fitness device based on motor-controlled force according to claim 1, characterized in that, The inner bottom wall of the drive box (5) is connected to a reinforcing base (18), and the upper surface of the reinforcing base (18) is connected to the outer surface of the servo motor (7).
4. A fitness device based on motor-controlled force according to claim 1, characterized in that, The drive box (5) has a heat dissipation window (19) on its left side, and a filter screen is connected inside the heat dissipation window (19).
5. A fitness device based on motor-controlled force according to claim 1, characterized in that, Both sets of support columns (2) are connected to an X-shaped connecting frame (20) on their side that is close to each other. The X-shaped connecting frame (20) is made of aluminum alloy.
6. A fitness device based on motor-controlled force according to claim 1, characterized in that, A control box (21) is mounted on the upper surface of the frame (1), and a human-machine interactive touch screen (22) is mounted on the right side of the control box (21).
7. A fitness device based on motor-controlled force according to claim 6, characterized in that, A buzzer (23) is installed on the front of the control box (21), and two status indicator lights (24) are installed on the upper surface of the control box (21).
8. A fitness device based on motor-controlled force according to claim 1, characterized in that, The frame (1) is connected to positioning plates (25) on both the left and right sides, and a set of positioning holes (26) are opened inside the two positioning plates (25).