Anti-theft resistance-adjustable fitness equipment counterweight force arm

Abstract

The invention belongs to the technical field of sports equipment, and particularly relates to an anti-theft resistance-adjustable fitness equipment counterweight force arm. The transverse force arm pipe is rotationally connected to the main body frame and extends in the front-back direction. The sliding device is slidably connected to the transverse force arm pipe in the front-back direction, and a balancing weight is arranged on the sliding device. The front end of the connecting rod driving mechanism is connected with the sliding device. The positioning adjusting system is connected with the transverse force arm pipe and the rear end of the connecting rod driving mechanism. The connecting rod driving mechanism is used for driving the sliding device to slide on the transverse force arm pipe in the front-back direction, the balancing weight on the sliding device can be driven to move to different positions of the transverse force arm pipe, and training resistance of different intensities is provided for a user. Compared with the prior art that the number of balancing weights is adjusted, continuous or fine resistance adjustment can be achieved, and individual training requirements of different users can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of sports equipment, and in particular relates to an anti-theft fitness equipment counterweight arm with adjustable resistance. Background Art

[0002] With the rise of national fitness awareness, the use of outdoor fitness equipment is increasing. In outdoor strength training equipment, the counterweight arm is the core component for achieving resistance adjustment. Its main function is to provide users with different training resistance intensities by changing the position or weight of the counterweight.

[0003] However, the weight blocks (such as barbell plates) of existing outdoor fitness equipment are usually installed directly on the U-shaped slide bar and are only fixed by simple clips or nuts. This fixing method is easy to disassemble, resulting in frequent theft of barbell plates, which not only increases the maintenance cost of the equipment but also affects the normal use of users. The traditional resistance adjustment mechanism relies on the weight of a single barbell plate. The resistance adjustment range is limited by the specifications of the barbell plate (such as 5kg, 10kg, etc.), and it is impossible to achieve continuous or fine resistance adjustment, making it difficult to meet the personalized training needs of different users. Users need to manually adjust the resistance by adjusting the position of the barbell plate on the slide bar. This process is prone to safety accidents such as pinching hands and bumping. In addition, bending over to operate the barbell plates may also cause strain on the waist, especially for middle-aged and elderly users or those with physical disabilities, the safety risk is higher.

[0004] Therefore, it is necessary to design a theft-proof fitness equipment with adjustable resistance and a weight arm to solve the above problems. Summary of the Invention

[0005] In view of the above problems, the present invention provides an anti-theft fitness equipment counterweight arm with adjustable resistance to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an anti-theft fitness equipment with adjustable resistance and a weight-bearing arm, which is applied to outdoor fitness equipment. The outdoor fitness equipment includes a main frame, including: a transverse lever arm tube, the transverse lever arm tube being rotatably connected to the main frame and extending in a front-to-rear direction; a sliding device, the sliding device being slidably connected to the transverse lever arm tube in a front-to-rear direction, and the sliding device being provided with a counterweight; a connecting rod driving mechanism, wherein a front end of the connecting rod driving mechanism is connected to the sliding device; A positioning and adjustment system is connected to the transverse lever arm tube, and a rear end of the connecting rod drive mechanism is connected to the positioning and adjustment system.

[0007] Furthermore, the anti-theft adjustable resistance fitness equipment counterweight arm also includes: A longitudinal support arm is connected to the rear end of the transverse lever arm tube, and the longitudinal support arm and the transverse lever arm tube are L-shaped.

[0008] Furthermore, the anti-theft adjustable resistance fitness equipment counterweight arm also includes: A transverse shaft, wherein two transverse shafts are provided, and the two transverse shafts are respectively connected to the left and right ends of the sliding device, and the axial direction of the transverse shaft is toward the left and right directions, and the two transverse shafts are connected to the counterweight block; Flanges are connected to the two transverse axes and are used to limit the counterweight.

[0009] Furthermore, a guide groove matching the transverse lever arm tube is provided in the sliding device, and the sliding device is slidably connected to the transverse lever arm tube through the guide groove.

[0010] Furthermore, the connecting rod driving mechanism includes: A connecting rod arm, the front end of which is rotatably connected to the sliding device; A driving connecting rod, wherein the rear end of the driving connecting rod is rotatably connected to the rear end of the transverse lever arm tube, and the front end of the driving connecting rod is hinged to the rear end of the lever arm.

[0011] Furthermore, the connecting rod driving mechanism further includes: A handle is connected to the driving connecting rod.

[0012] Furthermore, the positioning adjustment system includes: A positioning plate, the positioning plate is connected to the rear end of the transverse lever arm tube, and a plurality of positioning holes are distributed on the positioning plate; A positioning pin is connected to the driving connecting rod and is used to be inserted into the positioning hole.

[0013] Furthermore, the flange is connected to the transverse axis via an anti-theft bolt, and the head of the anti-theft bolt is a non-standard shape.

[0014] Furthermore, a sealing design is adopted at the connection between the sliding device and the transverse lever arm tube.

[0015] Furthermore, the transverse lever arm tube can also be provided in a circular tube shape, with counterweight plates provided on both sides of one end, and a plurality of rectangular counterweight blocks are installed on the surface of the counterweight plate using positioning bolts.

[0016] Technical effects and advantages of the present invention: By using a connecting rod drive mechanism to drive the sliding device to slide in the front-to-back direction on the transverse lever arm tube, the counterweight block on the sliding device can be driven to move to different positions of the transverse lever arm tube, and the positioning adjustment system can be used to fix the position of the counterweight block on the transverse lever arm tube, thereby providing users with training resistance of different intensities.

[0017] The connecting rod drive mechanism is used to drive the counterweight blocks on the sliding device to move to different positions of the transverse lever arm tube to adjust the training resistance. Compared with the existing technology of adjusting the number of counterweight blocks, continuous or fine resistance adjustment can be achieved, which is conducive to meeting the personalized training needs of different users.

[0018] There is no need to manually adjust the position of the weight to adjust the training resistance, avoiding safety accidents such as pinching hands and bumps.

[0019] There is no need to bend over to operate the weights, which avoids strain on the waist and helps reduce safety risks for middle-aged and elderly users or people with physical disabilities when adjusting training resistance.

[0020] The counterweight blocks are integrally arranged on the sliding device, making it difficult to disassemble them one by one, thereby reducing the risk of theft.

[0021] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the mechanisms indicated in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic structural diagram of a weight-adjustable resistance fitness equipment counterweight arm for anti-theft according to an embodiment of the present invention is shown; Figure 2 A partial structural diagram of a weight-adjustable anti-theft fitness equipment arm according to an embodiment of the present invention is shown; Figure 3 A diagram showing the use state of the weighted arm of the anti-theft and adjustable resistance fitness equipment according to an embodiment of the present invention is shown; Figure 4 A schematic diagram showing a counterweight arm of an anti-theft and adjustable resistance fitness equipment according to an embodiment of the present invention using a rectangular counterweight block for counterweighting is shown; Figure 5 Shows an embodiment of the present invention assembled Figure 4 Diagram of the counterweight arm in use.

[0024] Figure markings: 1. Main frame; 2. Horizontal lever arm tube; 3. Sliding device; 4. Connecting rod drive mechanism; 5. Positioning adjustment system; 6. Seat frame; 7. Left and right connecting frames of the seat; 8. First sitting-type back-pull connecting frame; 9. Second sitting-type back-pull connecting frame; 10. Left arm frame; 11. Right arm frame; 12. Seat cushion; 13. Chest pad; 14. Rotating shaft; 15. Longitudinal support arm; 16. Training handle; 17. Horizontal axis; 18. Flange; 19. Guide groove; 20. Connecting rod lever arm; 21. Driving connecting rod; 22. Handle; 23. Positioning plate; 24. Positioning pin; 25. Positioning hole; 26. Counterweight plate; 27. Rectangular counterweight block. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0026] The positive direction of the X axis is forward, the negative direction of the X axis is backward, the positive direction of the Y axis is left, the negative direction of the Y axis is right, the positive direction of the Z axis is upward, and the negative direction of the Z axis is downward.

[0027] like Figures 1 to 3As shown, an anti-theft adjustable resistance fitness equipment with a counterweight arm is used for outdoor fitness equipment. The outdoor fitness equipment includes a main frame 1, a transverse arm tube 2, a sliding device 3, a connecting rod drive mechanism 4 and a positioning adjustment system 5. The transverse arm tube 2 is rotatably connected to the main frame 1, and the transverse arm tube 2 extends in the front-to-back direction. Specifically, the main frame 1 includes a bench frame 6, left and right bench connecting frames 7, a first sitting back pull-up connecting frame 8, a second sitting back pull-up connecting frame 9, a left arm frame 10 and a right arm frame 11. The bench frame 6 is connected to a seat cushion 12 and a chest pad 13. The left and right sides of the front end of the bench frame 6 are respectively connected to the left arm frame 10 and the right arm frame 11 by a left and right bench connecting frame. The front and rear ends of the left arm frame 10 and the right arm frame 11 are respectively connected by the first sitting back pull-up connecting frame 8 and the second sitting back pull-up connecting frame 9. The bench frame 6 is connected to the second sitting back pull-up connecting frame 9. Secondly, a rotating shaft 14 is provided at the rear end of the transverse lever tube 2. This rotating shaft 14 can be integrally formed or welded with the transverse lever tube 2. The axial direction of the rotating shaft 14 faces left or right, and the angle can be adjusted according to actual conditions. A transverse lever tube 2 can be mounted on both the left and right arm frames 10, 11, allowing the transverse lever tube 2 to be rotatably connected to the left or right arm frame 10, 11 via the rotating shaft 14. Preferably, the transverse lever tube 2 is made of high-strength aluminum alloy tubing, balancing lightweight and structural strength. The surface is anodized for enhanced corrosion resistance. The sliding device 3 is slidably connected to the transverse lever tube 2 in the front-to-back direction and is provided with a counterweight. Specifically, the counterweight can be configured as a barbell plate, meaning that a different number of barbell plates can be provided on the sliding device 3 as needed. The front end of the connecting rod drive mechanism 4 is connected to the sliding device 3. The positioning and adjustment system 5 is connected to the transverse lever tube 2, and the rear end of the connecting rod drive mechanism is connected to the positioning and adjustment system 5. Specifically, the positioning and adjustment system 5 is used to position the sliding device 3. Thus, by using the connecting rod drive mechanism 4 to drive the sliding device 3 to slide along the transverse lever arm tube 2 in the front-to-back direction, the counterweight on the sliding device 3 can be driven to move along the front-to-back direction to different positions on the transverse lever arm tube 2. The positioning and adjustment system 5 is then used to position the connecting rod drive mechanism 4, thereby positioning the sliding device 3 to fix the position of the counterweight on the transverse lever arm tube 2, thereby providing the user with different intensities of training resistance. Secondly, by using the connecting rod drive mechanism 4 to drive the counterweight on the sliding device 3 to move to different positions on the transverse lever arm tube 2 to adjust the training resistance, compared to the prior art method of adjusting the number of counterweights, continuous or precise resistance adjustment can be achieved, which is conducive to meeting the personalized training needs of different users. Secondly, there is no need to manually adjust the position of the counterweight to avoid safety accidents such as pinching hands and bumping. Secondly, there is no need to bend over to operate the counterweight, which avoids strain on the waist and helps reduce the safety risks of middle-aged and elderly users or those with physical disabilities when adjusting the training resistance.In addition, the counterweight is entirely arranged on the sliding device 3, which makes it difficult to disassemble it one by one, thereby reducing the risk of theft.

[0028] Alternatively, as Figure 1 As shown, it is convenient for users to train better. The anti-theft adjustable resistance fitness equipment counterweight arm also includes a longitudinal support arm 15, which is connected to the rear end of the transverse arm tube 2, and the longitudinal support arm 15 and the transverse arm tube 2 are L-shaped. Specifically, by arranging the longitudinal support arm 15 at the rear end of the transverse arm tube 2, the transverse arm tube 2 is arranged horizontally, and the longitudinal support arm 15 is arranged vertically. The lower end of the longitudinal support arm 15 can be connected to the transverse arm tube 2 by welding or bolts, or it can be formed in one piece. The upper end of the longitudinal support arm 15 is connected to a training handle 16, which is convenient for the user to grasp the training handle 16 to drive the transverse arm tube 2 to rotate for training.

[0029] Alternatively, as Figure 1 and Figure 2 As shown, in order to facilitate the installation of more barbell plates and to limit the counterweight, the anti-theft adjustable resistance fitness equipment counterweight arm also includes a transverse shaft 17 and a flange 18. Two transverse shafts 17 are provided, and the two transverse shafts 17 are respectively connected to the left and right ends of the sliding device 3. The axial direction of the transverse shaft 17 is oriented in the left and right directions, and the two transverse shafts 17 are connected to the counterweight. Specifically, the transverse shaft 17 is located at the upper end of the sliding device 3 and is cylindrical. The two transverse shafts 17 are connected to the flange 18, and the flange 18 is used to limit the counterweight.

[0030] Specifically, two flanges 18 are connected to the left transverse axis 17. The flange 18 close to the sliding device 3 is bolted to the sliding device 3, and the flange 18 away from the sliding device 3 is connected to the transverse axis 17. The left transverse axis 17 can be sleeved with multiple barbell plates as counterweights, and the two flanges 18 are used to limit the multiple barbell plates on the left transverse axis 17. Correspondingly, the right transverse axis 17 is also connected to two flanges 18. The flange 18 close to the sliding device 3 is bolted to the sliding device 3, and the flange 18 away from the sliding device 3 is connected to the transverse axis 17. The right transverse axis 17 can be sleeved with multiple barbell plates as counterweights, and the two flanges 18 are used to limit the multiple barbell plates on the right transverse axis 17. The two flanges 18 and the right transverse axis 17 can adopt single-sided counterweights or double-sided counterweights. Preferably, the barbell plate adopts a standard cast iron barbell plate, the center hole matches the horizontal axis 17, and the thickness can be selected according to training needs (such as 2.5kg, 5kg, 10kg, etc.).

[0031] Alternatively, as Figure 2As shown, in order to ensure the stability of the movement of the sliding device 3 relative to the transverse lever arm tube 2. A guide groove 19 matching the transverse lever arm tube 2 is provided in the sliding device 3, and the sliding device 3 is slidably connected to the transverse lever arm tube 2 through the guide groove 19. Specifically, the sliding device 3 is configured as a cubic structure, and is provided with a guide groove 19 facing the front and rear directions. The front and rear ends of the guide groove 19 are open, and the sliding device 3 is integrally sleeved on the transverse lever arm tube 2. Among them, the size of the guide groove 19 is slightly larger than the size of the transverse lever arm tube 2, so that the sliding device 3 can stably slide relative to the transverse lever arm tube 2 along the front and rear directions. Preferably, the main body of the sliding device 3 is a steel part, and a polytetrafluoroethylene wear-resistant pad is embedded in the guide groove 19 to reduce sliding friction resistance.

[0032] Alternatively, as Figures 1 to 3 As shown, the connecting rod drive mechanism 4 is used to facilitate driving the sliding device 3. The connecting rod drive mechanism 4 includes a connecting rod arm 20 and a driving rod 21. The front end of the connecting rod arm 20 is rotatably connected to the sliding device 3. The rear end of the driving rod 21 is hinged to the rear end of the transverse lever arm tube 2. The front end of the driving rod 21 is rotatably connected to the rear end of the connecting rod arm 20. The front end of the driving rod 21 is used to connect to the positioning adjustment system 5. Specifically, a hinge axis hole is provided on the side of the sliding device 3, and one end of the connecting rod arm 20 is connected via a pin. Taking the counterweight lever arm on the right arm frame 11 as an example, when driving the sliding device 3, when viewed from the right side as the front, the rear end of the driving rod 21 is driven to rotate counterclockwise relative to the rear end of the transverse lever arm tube 2, pulling the front end of the connecting rod arm 20 backward. The front end of the connecting rod arm 20 is connected to the sliding device 3 to drive the sliding device 3 to the rear side of the transverse lever arm tube 2. Accordingly, by driving the rear end of the driving link 21 to rotate clockwise relative to the rear end of the transverse lever arm tube 2, the front end of the connecting link lever arm 20 is pushed forward. The front end of the connecting link lever arm 20 is connected to the sliding device 3, thereby driving the sliding device 3 to move to the front side of the transverse lever arm tube 2. In this way, by changing the horizontal distance of the counterweight relative to the rotating shaft 14 (i.e., the lever arm length), the connecting link driving mechanism 4 prevents the user from directly contacting the counterweight, thus eliminating potential safety hazards such as pinching the hand and bending the waist.

[0033] Alternatively, as Figure 1 and Figure 2As shown, it is convenient to drive the driving connecting rod 21 to rotate. The connecting rod driving mechanism 4 also includes a handle 22, and the handle 22 is connected to the driving connecting rod 21. Specifically, by connecting the handle 22 to the driving connecting rod 21, specifically, taking the counterweight arm on the right arm 11 as an example, the handle 22 and the right side of the driving connecting rod 21, that is, the handle 22 is located on the side away from the main frame 1, so that it is convenient for the user to act on the handle 22 to pull or push the driving connecting rod 21 to rotate. Thus, the user indirectly adjusts the position of the counterweight block by operating the handle 22 on the driving connecting rod 21, without directly touching the counterweight block, and can eliminate the risk of pinching the hand. Secondly, the handle 22 adopts an arc-shaped anti-slip design, which conforms to the holding angle of the human palm, which is conducive to reducing hand fatigue during operation.

[0034] Alternatively, as Figures 1 to 3 As shown, the positioning and adjustment system 5 includes a positioning plate 23 and positioning pins 24. The positioning plate 23 is connected to the rear end of the transverse lever arm tube 2. The positioning plate 23 is provided with multiple positioning holes 25. Specifically, the positioning plate 23 is configured in a sector or circular shape and is coaxial with the drive link 21. Furthermore, the positioning plate 23 has multiple positioning holes 25 evenly distributed along the circumference (e.g., one hole is provided every 15°). The positioning pins 24 are connected to the drive link 21 and are designed to be inserted into the positioning holes 25. Specifically, when adjusting the position of the counterweight on the transverse lever arm tube 2, the positioning pin 24 is first removed from a positioning hole 25. When the sliding device 3 moves to the target position of the transverse lever arm tube 2, the positioning pin 24 is then inserted into the corresponding positioning hole 25 to lock the position of the counterweight. In other words, by selecting different positioning holes 25, the lever arm length can be precisely adjusted, thereby changing the counterweight torque (torque = counterweight weight × lever arm length). Thus, through the multiple positioning holes 25 on the positioning plate 23, the lever arm length can be adjusted in stages. The adjustment range of the counterweight torque is no longer limited to the weight of a single barbell plate, but is continuously adjustable through position changes (for example, when the counterweight weight is fixed, the torque increases accordingly for every 10 cm increase in lever arm length), meeting the personalized training intensity needs of different users. Secondly, the guide groove 19 and positioning pin 24 ensure the smoothness and reliability of the adjustment process, improving the safety of the equipment. In addition, the overall structure uses a mechanical linkage transmission, eliminating the need for complex electronic or hydraulic systems, resulting in low maintenance costs, adaptability to harsh outdoor environments, and a long service life.

[0035] Optionally, the flange 18 is connected to the sliding device 3 via an anti-theft bolt, the head of which has a non-standard shape. Specifically, the bolt connecting the flange 18 to the sliding device 3 uses a specially designed anti-theft bolt with a non-standard head shape (e.g., a torx-shaped head with a column). This bolt requires a specialized tool for removal, effectively preventing the counterweight from being stolen and is suitable for outdoor use. Preferably, the anti-theft bolt is made of 304 stainless steel, has a torx-shaped head with a column, and is compatible with a dedicated wrench.

[0036] Optionally, a sealing design is adopted at the connection between the sliding device 3 and the transverse lever arm tube 2. Specifically, a sealing design is adopted at the connection between the sliding device 3 and the transverse lever arm tube 2 to prevent foreign matter from entering and affecting the sliding performance, while increasing the difficulty of illegal disassembly.

[0037] In summary, by cooperating with the anti-theft bolts and the flange 18, the barbell plates are structurally prevented from being stolen, solving the safety pain points of outdoor equipment. The connecting rod drive mechanism 4 is used to achieve non-contact adjustment of the counterweight position, avoiding the user from directly operating the counterweight, thereby improving safety and convenience. The positioning holes 25 on the positioning plate 23 are used to achieve graded adjustment of the lever arm length, breaking through the limitations of the traditional weight stacking of barbell plates and achieving flexible and adjustable resistance. The present invention effectively solves the problems of existing outdoor fitness equipment in terms of anti-theft, resistance adjustment and safety through mechanical structure innovation. It has the advantages of simple structure, controllable cost and strong applicability, and can be widely used in various strength training equipment such as horizontal bars, parallel bars, and bench press racks.

[0038] In another embodiment of the present invention, the positioning plate 23 is replaced with an arc-shaped rack with a scale, and the sliding device 3 realizes stepless sliding by meshing the gear and the rack, and cooperates with the damper to provide smooth resistance adjustment to meet higher precision training needs.

[0039] In another embodiment of the present invention, a plurality of transverse axes 17 are provided on the transverse lever arm tube 2, and a plurality of barbell plates can be suspended simultaneously. By adjusting the positions of different barbell plates in groups, a more complex resistance combination mode can be achieved.

[0040] In another embodiment of the present invention, a micro motor and a controller are integrated on the driving link 21. The user inputs the target resistance value through the touch screen or remote control, and the motor automatically drives the sliding device 3 to the corresponding position, thereby improving the convenience of adjustment (suitable for smart fitness equipment).

[0041] In another embodiment of the present invention, Figure 4 、 5 As shown, the transverse force arm tube 2 can also be set in a circular tube shape, and a counterweight plate 26 is set on both sides of one end. A plurality of rectangular counterweight blocks 27 are installed on the surface of the counterweight plate 26 using positioning bolts, and a plurality of rectangular counterweight blocks 27 are used to counterweight the equipment.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements 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 the present invention.

Claims

1. An anti-theft and adjustable resistance fitness equipment with a weight arm, used for outdoor fitness equipment, the outdoor fitness equipment comprising a main frame (1), characterized in that: include: A transverse lever arm tube (2), wherein the transverse lever arm tube (2) is rotatably connected to the main frame (1), and the transverse lever arm tube (2) extends in a front-to-rear direction; A sliding device (3), the sliding device (3) is slidably connected to the transverse lever arm tube (2) in a front-to-rear direction, and a counterweight block is provided on the sliding device (3); A connecting rod driving mechanism (4), wherein a front end of the connecting rod driving mechanism (4) is connected to the sliding device (3); A positioning and adjusting system (5) is connected to the transverse lever arm tube (2), and a rear end of the connecting rod driving mechanism (4) is connected to the positioning and adjusting system (5).

2. The anti-theft and adjustable resistance fitness equipment counterweight arm according to claim 1, characterized in that: Also includes: A longitudinal support arm (15), wherein the longitudinal support arm (15) is connected to the rear end of the transverse lever arm tube (2), and the longitudinal support arm (15) and the transverse lever arm tube (2) are in an L shape.

3. The anti-theft and adjustable resistance fitness equipment counterweight arm according to claim 2, characterized in that: Also includes: A transverse shaft (17), wherein two transverse shafts (17) are provided, and the two transverse shafts (17) are respectively connected to the left and right ends of the sliding device (3), and the axial direction of the transverse shaft (17) is oriented in the left and right directions, and the two transverse shafts (17) are both connected to the counterweight block; A flange (18) is connected to each of the two transverse shafts (17), and the flange (18) is used to limit the counterweight.

4. The anti-theft and adjustable resistance fitness equipment counterweight arm according to claim 1, characterized in that: A guide groove (19) matching the transverse lever arm tube (2) is provided in the sliding device (3), and the sliding device (3) is slidably connected to the transverse lever arm tube (2) via the guide groove (19).

5. The anti-theft and adjustable resistance fitness equipment counterweight arm according to claim 3, characterized in that: The connecting rod driving mechanism (4) comprises: A connecting rod arm (20), the front end of which is rotatably connected to the sliding device (3); A driving connecting rod (21) is provided, wherein the rear end of the driving connecting rod (21) is rotatably connected to the rear end of the transverse lever arm tube (2), and the front end of the driving connecting rod (21) is hinged to the rear end of the lever arm (20).

6. The anti-theft and adjustable resistance fitness equipment counterweight arm according to claim 5, characterized in that: The connecting rod driving mechanism (4) further comprises: A handle (22) is connected to the driving connecting rod (21).

7. The anti-theft and adjustable resistance fitness equipment counterweight arm according to claim 5, characterized in that: The positioning and adjustment system (5) comprises: A positioning plate (23), the positioning plate (23) being connected to the rear end of the transverse lever arm tube (2), and having a plurality of positioning holes (25) distributed on the positioning plate (23); A positioning pin (24), the positioning pin (24) is connected to the driving connecting rod (21), and the positioning pin (24) is used to be inserted into the positioning hole (25).

8. The anti-theft and adjustable resistance fitness equipment counterweight arm according to claim 6, characterized in that: The flange (18) is connected to the transverse axis (17) via an anti-theft bolt, and the head of the anti-theft bolt is of a non-standard shape.

9. The anti-theft and adjustable resistance fitness equipment counterweight arm according to claim 6, characterized in that: The connection between the sliding device (3) and the transverse lever arm tube (2) adopts a sealing design.

10. The anti-theft and adjustable resistance fitness equipment counterweight arm according to claim 1, characterized in that: The transverse arm tube (2) can also be provided in a circular tube shape, and a counterweight plate (26) is provided on both sides of one end, and a plurality of rectangular counterweight blocks (27) are mounted on the surface of the counterweight plate (26) using positioning bolts.

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