A rope tension ratio conversion mechanism and conversion method

Abstract

The application discloses a rope tension ratio conversion mechanism and conversion method, which comprises at least one locking frame with a movable pulley installed inside; a rope connecting assembly connected with a first rope and a second rope after the movable pulley; a ratio switching assembly for fixing, limiting and switching the rope connecting assembly; after the rope connecting assembly is fixed and limited, the tension force is not subjected to the movable pulley, and the tension force and the gravity of the load are lifted at a ratio of 1:1; after the rope connecting assembly is released, the tension force is subjected to the movable pulley, and the tension force and the gravity of the load are lifted at a ratio of 1:2; after the rope connecting assembly is fixed and limited, a second rope tail locking and releasing component is used to wind the second rope; and after the rope connecting assembly is released, the second rope end is prevented from loosening and locked. The application can realize equal force / energy-saving quick switching of the tension force of a traction end and the gravity of a load, does not need to re-wind the rope, and is suitable for various rope transmission systems such as fitness equipment.

Description

Technical Field

[0001] This invention belongs to the field of rope transmission technology, specifically relating to a rope tension ratio conversion mechanism and conversion method, which can be applied to rope transmission systems of fitness equipment, rehabilitation training equipment, etc. Background Technology

[0002] In various rope drive systems, there is a technical need to quickly switch the tension ratio, such as in strength training equipment in fitness equipment. In existing technologies, switching the tension ratio often requires complex rope rewinding or changing pulley systems, which is cumbersome and inefficient. For example, the frame rope tension structure of the existing fly squat frame relies on the integrated load-bearing frame of the squat frame to provide fixed support for the pulley / rope system. Through different combinations of fixed and movable pulleys and rope winding methods, a fixed ratio conversion between the actual tension applied by the trainee and the weight of the counterweights is achieved, thus adapting to different training force requirements.

[0003] The essence of the rope tension ratio conversion in a frame is the mechanical force-saving principle of pulley systems. Due to space constraints and integrated design limitations, the Flying Bird Squat Frame only uses a simple combination of a single fixed pulley and a fixed + movable pulley (without complex multi-pulley systems). Therefore, the ratio conversion is mainly based on two core ratios: 1:1 (equal force) and 1:2 (force-saving). 1:1 is the equal force ratio conversion, and its mechanical structure mainly consists of one end of the rope fixed, passing over a pulley, and the other end directly connected to the handle and the counterweight. 1:2 is the force-saving ratio conversion, and its mechanical structure mainly consists of a single movable pulley design, with the counterweight connected to it. When the trainee pulls one rope, the weight of the counterweight is actually shared.

[0004] Currently, many squat racks on the market have fixed rope tension ratio conversion methods due to space and load-bearing limitations. These methods are often based on factory-installed pulley systems and rope winding techniques (e.g., a comprehensive squat rack with publication number CN222286318U published on the Chinese Patent Website). This design prevents quick switching between 1:1 and 1:2 ratios during training (e.g., performing a 1:1 strength training followed by a 1:2 muscle endurance training set). Switching often requires disassembling the pulleys and rewinding the ropes, making the process cumbersome and negating the core advantage of integrated equipment for efficient training. A search of existing technologies reveals no solution that allows for rapid ratio switching without rewinding the ropes using a single mechanism. Therefore, this invention provides a rope tension ratio conversion mechanism that is of significant importance in addressing these issues. Summary of the Invention

[0005] This invention provides a rope tension ratio conversion mechanism. During training, if the locking block in the ratio switching component is not aligned and inserted into the annular locking groove on the side wall of the docking block, the traction component can drive the movable pulley to rotate and lift the counterweight component through the track of the pulley assembly. In this case, the movable pulley can save 1 / 2 of the force, and the tension is 1 / 2 of the counterweight's weight. However, if the locking block is aligned and inserted into the annular locking groove on the side wall of the docking block, the traction component will be locked and will no longer be able to drive the movable pulley to rotate. Only the direction of the tension can be changed through the fixed pulley, without changing the magnitude of the tension. The pulling force is equal to the counterweight's weight. Compared to traditional bird squat frames, this mechanism can quickly switch between 1:1 and 1:2 pulling force ratios via a proportional switching component without disassembling pulleys and rewinding the rope, making the entire switching operation more convenient and faster. The proportional switching component in this device includes plug-in, side-pull, pull-out, and rotary structures. Different structures of proportional switching components can achieve rapid switching between 1:1 and 1:2 pulling force ratios in different ways to meet the proportional switching needs in different scenarios. In summary, this solves the problems in the background technology.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] The present invention provides a rope tension ratio conversion mechanism, which is mounted on a load-bearing frame via a pulley assembly and a pulley rope, to switch the tension at the traction end and the weight of the load in a 1:1 and 1:2 ratio. ,include:

[0008] At least one locking frame is installed on top of the load; a movable pulley that engages with the first pull rope from the traction end is installed inside the locking frame;

[0009] A rope connection assembly connects a first rope and a second rope after passing through a movable pulley.

[0010] The proportional switching component, installed on the locking frame, switches between fixing and releasing the pull rope connection component. When the pull rope connection component is fixed, the pulling force does not pass through the movable pulley, and the pulling force and the weight of the load rise and fall in a 1:1 ratio. When the pull rope connection component is released, the pulling force passes through the movable pulley, and the pulling force and the weight of the load rise and fall in a 1:2 ratio.

[0011] The locking and releasing component at the end of the second pull rope is fixedly installed on the load-bearing frame. After the pull rope connecting component is fixed and limited, the second pull rope is wound up; after the pull rope connecting component is released, the end of the second pull rope is locked to prevent loosening.

[0012] Furthermore, the locking frame is equipped with a supply The first pull rope has a threaded hole with a diameter larger than the outer diameter of the pull rope connecting assembly, allowing the pull rope connecting assembly to pass upwards; the upper part of the pull rope connecting assembly is provided with a first locking cavity for locking the large end of the tail of the first pull rope, and the lower part is provided with a second locking cavity for locking the large end of the front of the second pull rope.

[0013] Furthermore, the outer periphery of the pull rope connecting assembly is provided with a limiting groove, and the proportional switching assembly includes a U-shaped locking limiting member. By flicking, inserting, or rotating, the U-shaped locking limiting member is locked in the limiting groove, thereby fixing the pull rope connecting assembly to the locking frame, so that the pull rope connecting assembly and the locking frame move up and down together.

[0014] Furthermore, the pull rope connection assembly has a limiting hole on at least one side, and the proportional switching assembly includes a plug corresponding to the limiting hole. By inserting the plug into the limiting hole, the pull rope connection assembly and the locking frame move up and down together.

[0015] Furthermore, the outer side of the pull rope connecting assembly is provided with an external thread, and the proportional switching assembly includes a rotating threaded ring. The rotating threaded ring is rotated and threadedly connected to the external thread and locked in the limiting space of the locking frame by a rotating threaded connection, thereby fixing the pull rope connecting assembly on the locking frame and making the pull rope connecting assembly and the locking frame move up and down together.

[0016] Furthermore, the second pull rope tail end locking and releasing component includes a winding component for locking the tail end of the second pull rope and automatically winding the second pull rope, and a limiting component for locking the winding component to prevent loosening.

[0017] Furthermore, the winding component is a winding device or a weight block; the limiting component is a plug-in type, which limits and locks the winding reel in the winding device, or locks it after plugging into the plug hole provided on the side of the weight block.

[0018] Furthermore, the winding device adopts a ratchet disc structure with a coil spring. The winding disc is a ratchet disc, and a rotating stop is set at the position of the ratchet teeth on one side of the ratchet disc. The rotating stop is rotatably installed on the winding device housing through a rotating sleeve with an anti-deviation groove on the inner wall. A plug-in shaft with an anti-deviation protrusion is inserted into the rotating sleeve. The rotation of the plug-in shaft causes the rotating stop to lock the ratchet teeth. The outer end of the plug-in shaft is provided with a snap-fit ​​anti-deviation locking structure to lock the plug-in shaft on the winding device housing.

[0019] Furthermore, the anti-deviation locking structure includes a fork arm disposed at the outer end of the plug shaft, a positioning protrusion disposed on the front side of the fork arm, and a positioning groove disposed on the side of the take-up housing and engaging with the positioning protrusion.

[0020] Furthermore, the weight block is slidably mounted on the guide rail via a slider, and the limiting component is a pin that passes through a hole on the load-bearing frame and corresponds to a limiting locking hole on the weight block to achieve locking and limiting of the weight block; the weight block is used to counteract the gravity that prevents the second pull rope from slackening.

[0021] A method for converting rope tension ratios, implemented through the aforementioned rope tension ratio conversion mechanism, includes the following steps:

[0022] S1. The locking frame is provided and installed on the top of the load, and a movable pulley is installed inside the locking frame;

[0023] S2. Provide the tension connection assembly to connect the first pull rope and the second pull rope after passing through the movable pulley; S3. The pull rope connection component is switched between fixed and open positions via a proportional switching component. When the pull rope is fixed, the force is applied without passing through the movable pulley, achieving equal-force lifting. When the pull rope is opened, the force is applied through the movable pulley, achieving effortless lifting. S4. By using the locking and releasing device at the end of the second pull rope, the second pull rope is wound up when it is in the fixed limit position, and the end of the second pull rope is locked to prevent loosening when it is released.

[0024] The present invention has the following advantages over the prior art:

[0025] (1) It can quickly switch between two tension ratios of 1:1 and 1:2: When training, if the ratio switching component locks the rope, the traction component can drive the movable pulley to rotate and drive the counterweight component to rise through the track of the pulley component. At this time, the movable pulley can save 1 / 2 of the force, and the tension is 1 / 2 of the counterweight weight. However, if the ratio switching component locks the traction component, the second rope can no longer drive the movable pulley to rotate. It can only change the direction of the tension by using the fixed pulley, without changing the magnitude of the tension. At this time, the magnitude of the tension is equal to the weight of the counterweight. Compared with the traditional bird squat frame, this mechanism can quickly switch between two tension ratios of 1:1 and 1:2 through the ratio switching component without disassembling the pulley and rewinding the rope, thus making the entire switching operation more convenient and faster.

[0026] (2) Various ways to switch the tension ratio: The U-shaped locking limiter in the ratio switching component of this device can be locked in the limit groove by flicking, inserting or rotating, or the plug can be inserted into the limit hole by inserting the plug pin, thereby fixing the pull rope connecting component to the locking frame, so that the pull rope connecting component and the locking frame move up and down together; not limited to the aforementioned structures, the ratio switching components with different structures can achieve the rapid conversion of the 1:1 and 1:2 tension ratios in different ways to meet the ratio switching needs in different scenarios; of course, other ratio switching components can meet the problems to be solved by this solution and produce the same technical effect, and all of them are within the protection scope of this technical solution;

[0027] (3) Under a 1:1 tension ratio, the second pull rope is automatically wound up by the locking and releasing component at the end of the second pull rope to prevent the pull rope from getting tangled; under a 1:2 tension ratio, the second pull rope is locked by the locking and releasing component at the end of the second pull rope so that the second pull rope can participate in the lifting and lowering motion, making the switching convenient and quick.

[0028] (4) Wide range of applicable scenarios: This device is not only suitable for the bird squat rack, but also for the gantry rack, Smith machine, multi-functional trainer, rehabilitation training equipment, and other scenarios that require rope ratio switching;

[0029] (5) Strong structural compatibility: The proportional switching component can be connected by toggling, plugging, rotating or rotating threaded connection; adaptable to different usage environments and cost requirements.

[0030] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a training frame with a proportional conversion mechanism for frame rope tension according to specific embodiment 1;

[0033] Figure 2 for Figure 1 A schematic diagram of the cable routing;

[0034] Figure 3 A schematic diagram showing the connection relationship between the pull rope connection assembly, the first pull rope, and the second pull rope;

[0035] Figure 4 for Figure 3 Cross-sectional view;

[0036] Figure 5 for Figure 1 A magnified view of a portion of position A in the middle;

[0037] Figure 6 for Figure 5 A schematic diagram of the structure of the medium-ratio switching component;

[0038] Figure 7 This is a schematic diagram of the structure of a proportional switching component with a U-shaped locking limit member in specific embodiment 2;

[0039] Figure 8 for Figure 7 A structural diagram of the part without the U-shaped locking limit component;

[0040] Figure 9 for Figure 7 Schematic diagram of the U-shaped locking and limiting component;

[0041] Figure 10 This is a schematic diagram of the structure of a proportional switching component with a U-shaped locking limit member in specific embodiment 3;

[0042] Figure 11 for Figure 10 A structural diagram of the part without the U-shaped locking limit component;

[0043] Figure 12 for Figure 10 Schematic diagram of the U-shaped locking and limiting component;

[0044] Figure 13 This is a schematic diagram of the structure of a proportional switching component with a U-shaped locking limit member in specific embodiment 4;

[0045] Figure 14 for Figure 13 A structural diagram of the part without the U-shaped locking limit component;

[0046] Figure 15 for Figure 13 Schematic diagram of the U-shaped locking and limiting component;

[0047] Figure 16 This is a schematic diagram of the structure of a proportional switching component with a U-shaped locking limit member in specific embodiment 5;

[0048] Figure 17 For Figure 16 A structural diagram of the part without the U-shaped locking limit component;

[0049] Figure 18 for Figure 16 Schematic diagram of the U-shaped locking and limiting component;

[0050] Figure 19 This is a schematic diagram of the structure of a proportional switching component with a rotating threaded ring and a pull rope connection component in specific embodiment 6;

[0051] Figure 20 for Figure 19 Vertical cross-sectional view;

[0052] Figure 21 This is a schematic diagram of the counterweight component in a specific embodiment;

[0053] Figure 22 for Figure 21 Internal sectional view of the counterweight component;

[0054] Figure 23 for Figure 19 Schematic diagram of a medium-load structure;

[0055] Figure 24 for Figure 1 A magnified view of a portion of position B in the middle;

[0056] Figure 25 for Figure 24 Front view;

[0057] Figure 26 for Figure 24 Internal structure diagram;

[0058] Figure 27 This is a schematic diagram of the plug-in shaft structure;

[0059] Figure 28 A schematic diagram of the structure when a weight block is used for the winding component.

[0060] The attached diagram lists the components represented by each number as follows:

[0061] 1. Load-bearing frame; 2. Second fixed pulley; 3. Third fixed pulley; 31. Fourth fixed pulley; 32. Fifth fixed pulley; 33. Upper movable pulley; 34. Lower movable pulley; 35. Eighth fixed pulley; 36. Ninth fixed pulley; 37. Second connecting piece; 38. First connecting piece; 39. Third pull rope; 4. Sixth fixed pulley; 41. Seventh fixed pulley; 42. First pull rope; 5. Movable pulley; 7. Second pull rope; 8. Second pull rope; 9. Traction end; 10. First locking cavity; 11. Limiting groove; 12. Limiting hole; 13. Counterweight frame; 14. Through hole; 15. Lifting rod; 16. Positioning hole; 17. Load; 18. Column hole; 19. Insertion hole; 20. Lock 21. Tightening frame; 22. Mounting hole; 23. Rope threading hole; 24. Locking block; 25. Insertion / removal port; 26. Gear position mark; 27. Side shift port; 28. Pull-out port; 29. ​​Pull-out hole; 30. Pull-out rod; 31. Rotation port; 32. Positioning port; 33. Guide cylinder; 34. Guide hole; 35. Guide rod; 36. Ratchet disc box; 361. Rope feeding hole; 3611. Ninth fixed pulley; 362. Limiting wheel; 363. Rewinding component; 364. Rotating sleeve; 365. Rotating stop block; 371. Fork arm; 372. Positioning protrusion; 373. Positioning protrusion; 374. Anti-deviation groove; 38. External thread; 39. Rotary threaded ring; 40. Limiting seat. Detailed Implementation

[0062] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0063] In the description of this invention, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0064] The proportional conversion mechanism for frame rope tension in this solution is suitable for sports equipment, especially for stretching equipment, and particularly for the fly squat rack.

[0065] like Figure 1-2 The diagram shown is a structural schematic of the proportional conversion mechanism for frame rope tension adapted to the bird squat frame in this solution.

[0066] The existing solutions include two requirements:

[0067] The first method is to apply a 1:1 ratio between the tension at the traction end 9 and the weight of the load 17.

[0068] The front of the load-bearing frame 1 is provided with a traction end 9, and the rear of the traction end 9 is connected to a first pull rope 42. The first pull rope 42 passes in sequence through the first fixed pulley 91 in front of the load-bearing frame 1 and behind the traction end 9, the second fixed pulley 2 above the load-bearing frame 1 and the third fixed pulley 3, and then downwards to connect with the upper movable pulley 33 of the movable pulley group. It continues upwards to connect with the fourth fixed pulley 31 and the fifth fixed pulley 32 above the load-bearing frame 1, and then downwards to be fixedly connected to the upper part of the load 17. The lower movable pulley 34 of the movable pulley group is separately connected to a third pull rope 39. One end of the third pull rope 39 is downwards to connect with the first connecting member 38 at the bottom of the load-bearing frame 1, and the other end is connected with the eighth fixed pulley 35 and the ninth fixed pulley 3611 at the bottom of the load-bearing frame 1 and then continues upwards to connect with the second connecting member 37 on the side of the load-bearing frame 1.

[0069] The second method is to apply a 1:2 ratio between the tension at the traction end 9 and the weight of the load 17.

[0070] The front of the load-bearing frame 1 is provided with a traction end 9, and the rear of the traction end 9 is connected to a first pull rope 42. The first pull rope 42 passes in sequence through the first fixed pulley 91 in front of the load-bearing frame 1 and behind the traction end 9, the second fixed pulley 2 above the load-bearing frame 1 and the third fixed pulley 3, and then connects downward to the upper movable pulley 33 of the movable pulley group. It continues upward and connects to the fourth fixed pulley 31 and the fifth fixed pulley 32 above the load-bearing frame 1. It then connects downward and connects to the movable pulley 5 above the load 17. It continues upward and connects to the sixth fixed pulley 4 and the seventh fixed pulley 41 above the load-bearing frame 1 and is then fixed to the load-bearing frame 1. The lower movable pulley 34 of the movable pulley group is separately connected to a third pull rope 39. One end of the third pull rope 39 connects downward to the first connecting member 38 at the bottom of the load-bearing frame 1, and the other end connects to the eighth fixed pulley 35 and the ninth fixed pulley 3611 at the bottom of the load-bearing frame 1 and then continues upward to connect to the second connecting member 37 on the side of the load-bearing frame 1.

[0071] The two methods mentioned above cannot be used efficiently for switching and can only be used individually; or when switching, it is often necessary to first disassemble the pulley and then rewind the rope, making the entire switching operation quite cumbersome.

[0072] To address the above issues, this solution is proposed.

[0073] The differences between this solution and existing technologies include:

[0074] At least two sets of locking frames 20, one on the left and one on the right, are installed on top of the load 17; a movable pulley 5 is installed inside the locking frame 20 to cooperate with the first pull rope 42 from the traction end 9;

[0075] A pull rope connection assembly connects the first pull rope 42 and the second pull rope 7 after passing through the movable pulley 5;

[0076] The proportional switching component 201 is installed on the locking frame 20 to switch the fixed limit and release of the pull rope connection component; when the pull rope connection component is fixed, the force of the pull does not pass through the movable pulley 5, and the pull force and the weight of the load 17 rise and fall in a 1:1 ratio; when the pull rope connection component is released, the force of the pull passes through the movable pulley 5, and the pull force and the weight of the load 17 rise and fall in a 1:2 ratio.

[0077] The second pull rope tail locking and releasing component 36 is fixedly installed on the load-bearing frame 1. After the pull rope connecting component is fixed and limited, the second pull rope 7 is wound up; after the pull rope connecting component is released, the end of the second pull rope 7 is locked to prevent loosening.

[0078] Among them, such as Figure 5 , Figure 7 , Figure 10 , Figure 13 as well as Figure 16 The locking frame 20 is provided with a rope hole 22 for the first pull rope 42 to pass through. The diameter of the rope hole 22 is larger than the outer diameter of the pull rope connecting assembly, so that the pull rope connecting assembly can pass upward. The upper part of the pull rope connecting assembly is provided with a first locking cavity 10 for locking the large end of the tail of the first pull rope 42, and the lower part is provided with a second locking cavity 8 for locking the large end of the front of the second pull rope 7. The pull rope connecting assembly is generally of a spindle-shaped structure. In this embodiment, a spindle-shaped structure is preferred, and the diameter of the middle part of the spindle-shaped structure is larger than that of the two ends, forming a streamlined transition. Of course, in addition to the spindle-shaped structure of this embodiment, other structures such as spherical, columnar, or plate-shaped structures with limiting grooves or limiting holes on their outer periphery, which can realize the proportional switching function of this solution, are all within the protection scope of this solution.

[0079] Among them, such as Figure 3-4 As shown, a limiting groove 11 is provided on the outer periphery of the pull rope connecting assembly. The proportional switching assembly 201 includes a U-shaped locking limiting member 23. By flicking, inserting, or rotating, the U-shaped locking limiting member 23 is locked onto the limiting groove 11, thereby fixing the pull rope connecting assembly to the locking frame 20, so that the pull rope connecting assembly and the locking frame 20 move up and down together. In order to improve the anti-slip ability, the inner wall of the U-shaped notch of the U-shaped locking limiting member 23 can be provided with anti-slip texture or elastic pad, thereby improving the protective performance.

[0080] like Figure 3-6 As shown, the pull rope connection assembly has a limiting hole 12 on one side at the middle position. The proportional switching assembly 201 includes a plug post 35 corresponding to the limiting hole 12. By inserting the plug post into the limiting hole 12, the pull rope connection assembly and the locking frame 20 move up and down together.

[0081] The second pull rope tail locking and releasing component 36 includes a winding component 363 that locks the tail of the second pull rope 7 and automatically winds the second pull rope 7, and a limiting component that locks the winding component 363 to prevent loosening.

[0082] The winding component 363 is a winding device or a weight block; the limiting component is a plug-in type, which limits and locks the winding reel in the winding device, or locks it after plugging into the plug hole on the side of the weight block; the winding force provided by the winding component 363 is greater than the downward force generated by the second pull rope 7 itself, and less than 1 / 10 of the weight of the load 17.

[0083] Among them, such as Figure 24-27 As shown, the winding device adopts a ratchet disc structure with a coil spring, which is installed in the ratchet disc box 36. The ratchet disc box 36 has a rope hole 361 on the upper part and two sets of limit wheels 362 inside to limit the second rope winding action. The winding disc is a ratchet disc 363. A rotating stop 365 is set at the position of the ratchet teeth on one side of the ratchet disc 363. The rotating stop 365 is rotatably installed on the winding device housing through a rotating sleeve 364 with an anti-deviation groove 374 on the inner wall. A plug shaft 373 with an anti-deviation protrusion is inserted into the rotating sleeve 364. The rotating stop 365 locks the ratchet teeth by rotating the plug shaft 373. The outer end of the plug shaft 373 has a snap-fit ​​anti-deviation locking structure to lock the plug shaft 373 on the winding device housing. The contact surface between the rotating stop 365 and the ratchet teeth is an inclined surface. When locked in one direction, the self-locking angle is less than the friction angle.

[0084] The anti-deviation locking structure includes a fork arm 371 located at the outer end of the plug shaft 373, a positioning protrusion 372 located on the front side of the fork arm 372, and a positioning groove located on the side of the take-up housing that engages with the positioning protrusion 372.

[0085] like Figure 28 As shown, the weight block is slidably mounted on the guide rail by a slider. The limiting component is a pin, which passes through the through hole on the load-bearing frame and corresponds to the limiting locking hole on the weight block to lock and limit the weight block. The weight block is used to counteract the gravity of the second pull rope 7 to prevent slack. Specific Implementation Example 1:

[0087] like Figure 1-6As shown, in this embodiment, the proportional switching component 201 includes a plug-in post 35 corresponding to the limiting hole 12. By inserting the plug-in post 35 into the limiting hole 12, the pull rope connecting component and the locking frame 20 move up and down together. The plug-in post 35 is threadedly installed in the threaded mounting sleeve 33 on the side of the locking frame 20 through the nut 20. The threaded mounting sleeve 33 is fixedly installed on the locking frame 20 by bolts through the connecting block 32. By rotating and screwing the plug-in post 35 into or out of the limiting hole 12, the limiting locking or loosening of the pull rope connecting component is realized, thereby achieving a 1:1 tension ratio or a 1:2 tension ratio. Specific Implementation Example 2:

[0089] like Figure 7-9 As shown, the proportional switching component 201 includes a U-shaped locking limit member 23, which is installed by insertion and removal. Insertion and removal ports 24 are provided on the top sidewalls of both sides of the locking frame 20. The insertion and removal ports 24 are rectangular and correspond to the positions of the limiting grooves 11. The U-shaped locking limit member 23 is inserted into the insertion and removal port 24, and its end has a U-shaped notch. The width and thickness of the U-shaped locking limit member 23 are equal to the length and width of the insertion and removal port 24, respectively. Furthermore, the distance between the inner walls of the U-shaped notch at the end of the U-shaped locking limit member 23 and the annular limiting groove is equal to the distance between the inner walls of the U-shaped notch and the annular limiting groove. The inner diameters of 11 are equal. The end of the U-shaped locking limit member 23 is provided with a protrusion. By holding the protrusion, the U-shaped locking limit member 23 can be inserted into the insertion port 24. At this time, the U-shaped notch at the end of the U-shaped locking limit member 23 can be aligned and fit into the limiting groove 11 on the side wall of the pull rope connecting assembly. By pulling the pull rope connecting assembly out along the insertion port 24, the U-shaped notch at the end of the U-shaped locking limit member 23 can be disengaged from the limiting groove 11, so as to achieve a quick conversion between the two pulling force ratios of 1:1 and 1:2 by insertion and extraction. Specific Implementation Example 3:

[0091] like Figure 10-12The proportional switching component 201 includes a U-shaped locking limiter 23, which is installed by a lever. The top side wall of the locking frame 20 is provided with a gear position mark 25, with the two ends of the gear position mark 25 being 1:1 and 1:2 gear positions respectively. The top of the locking frame 20 has a side lever opening 26, which is dumbbell-shaped. The diameter of the circular holes at both ends of the side lever opening 26 is larger than the width of the middle end, and the two ends of the side lever opening 26 correspond to the gear positions at both ends of the gear position mark 25. The U-shaped locking limiter 23 is located below the side lever opening 26, and one end of its top is provided with a protrusion. The protrusion is stepped, wider at the top and narrower at the bottom, and its bottom diameter is equal to the width of the middle end of the side lever opening 26. The bottom end of the protrusion passes through the side lever opening 26 and extends into the locking frame 20. The end of component 3 furthest from the protrusion is provided with a U-shaped notch. The distance between the inner walls of the U-shaped notch corresponds to the inner diameter of the limiting groove 11. By moving the protrusion, the U-shaped locking limiting component 23 can be moved horizontally. When the U-shaped locking limiting component 23 moves to the left, the protrusion can move to the 1:1 position at the left end of the position mark 25. At this time, the U-shaped notch at the end of the U-shaped locking limiting component 23 can be aligned and fitted into the limiting groove 11 on the side wall of the pull rope connecting component. When the U-shaped locking limiting component 23 moves to the right, the protrusion can move to the 1:2 position at the left end of the position mark 25. At this time, the U-shaped notch at the end of the U-shaped locking limiting component 23 can be disengaged from the limiting groove 11, so as to achieve a quick conversion between the 1:1 and 1:2 pulling force ratios by side-shifting. Specific Implementation Example 4:

[0093] like Figure 13-15As shown, the proportional switching component 201 includes a U-shaped locking limit member 23, which is installed by insertion and removal. A pull-out port 27 is provided on the top side wall of the locking frame 20, and a pull-out frame 28 is fixedly connected to the top side wall of the locking frame 20 on the side of the pull-out port 27. A pull-out hole 29 is provided on the surface of the pull-out frame 28, which coincides with the central axis of the pull-out port 27 and corresponds to the position of the pull rope connecting component. The U-shaped locking limit member 23 is inserted into the pull-out port 27, with a U-shaped notch at one end and a pull rod 30 fixedly connected to the other end. A protrusion is provided at the end of the pull rod 30, and the distance between the inner walls of the U-shaped notch corresponds to the inner diameter of the limiting groove 11. The rod of the pull rod 30... The diameter corresponds to and is equal to the diameter of the pull hole 29. The distance between the inner side of the pull frame 28 and the outer side of the locking frame 20 is greater than the length of the U-shaped locking limit member 23. By holding the protrusion, the pull rod 30 can be moved until the U-shaped locking limit member 23 is inserted into the pull port 27. At this time, the U-shaped notch at the end of the U-shaped locking limit member 23 can be aligned and fitted into the limiting groove 11 on the side wall of the pull rope connecting assembly. When the U-shaped locking limit member 23 is pulled out along the pull port 27 and stored in the pull frame 28 by the pull rod 30, the U-shaped notch at the end of the U-shaped locking limit member 23 can be disengaged from the limiting groove 11 so that the 1:1 and 1:2 pulling ratios can be quickly converted by the pull method and the side push method. Specific Implementation Example 5:

[0095] like Figure 16-18 As shown, the proportional switching component 201 includes a U-shaped locking limit member 23, which is installed by rotation. Rotation openings 31 are provided on the top sidewalls of both sides of the locking frame 20. The rotation openings 31 are rectangular. A positioning opening 32 is provided on the top of the locking frame 20. The positioning opening 32 is circular and located between two rope holes 22. The U-shaped locking limit member 23 is arc-shaped, with a U-shaped notch at one end. The distance between the inner walls of the U-shaped notch corresponds to the inner diameter of the limiting groove 11. The thickness of the U-shaped locking limit member 23 corresponds to the width of the rotation opening 31. The top end of the positioning component 23 is provided with a protrusion. The protrusion is stepped and larger at the top and smaller at the bottom. The diameter of its bottom end is equal to the diameter of the positioning port 32. By rotating the protrusion clockwise, the U-shaped locking limit component 23 can be driven to deflect clockwise. At this time, the U-shaped notch at the end of the U-shaped locking limit component 23 can be aligned and fitted into the limiting groove 11 on the side wall of the pull rope connecting component. By rotating the protrusion counterclockwise, the U-shaped notch at the end of the U-shaped locking limit component 23 will be disengaged from the limiting groove 11, so that the two pulling force ratios of 1:1 and 1:2 can be quickly switched by rotation. Specific Implementation Example 6:

[0097] like Figures 19-20As shown in this specific embodiment, a limiting seat 40 is provided on the locking frame 20. The bottom of the pull rope connecting assembly is embedded in the embedding hole of the limiting seat 40. The second pull rope 7 passes through the embedding hole and cooperates with the movable pulley 5. A limiting space is provided between the limiting seat 40 and the through hole on the top of the locking frame 20 for the first pull rope 42 to pass through. A rotating threaded ring 39 is sleeved on the outside of the pull rope connecting assembly in the limiting space. The outer circumference of the rotating threaded ring 39 is provided with anti-slip texture. The locking frame 20 has openings on both sides to expose the rotating threaded ring 39. By lifting the rotating threaded ring 39 upward, the internal thread of the rotating threaded ring 39 is threadedly connected with the external thread 38 provided on the outside of the pull rope connecting assembly. The rotating threaded ring is connected by rotating thread. The pull rope connecting assembly is fixed to the locking frame 20 by a rotating threaded connection 39 with the external thread 38, allowing the pull rope connecting assembly and the locking frame 20 to move up and down together, achieving a 1:1 ratio of pulling force to load weight. After rotating the rotating threaded ring 39 in the opposite direction, the rotating threaded ring 39 disengages from the pull rope connecting assembly. Since the pull rope connecting assembly is located at the lower part of the external thread 38 and is relatively thin, it can pass directly through the rotating threaded ring 39. In other words, the movable pulley 5 participates in the pulling force, thereby achieving a 1:2 ratio of pulling force to load weight. This embodiment achieves rapid conversion between 1:1 and 1:2 pulling force ratios through a rotating threaded connection.

[0098] like Figure 21-23As shown; the counterweight assembly includes a pair of counterweight frames 13. Each counterweight frame 13 has three through holes 14 on both sides. A lifting rod 15 is fixedly connected to the bottom of the counterweight frame 13. The hole at the top of the lifting rod 15 is fixed to the positioning hole 16 in the middle of the counterweight frame 13 by a cotter pin. Several positioning holes 16 are formed on the surface of the lifting rod 15, and several loads 17 are mounted on the column of the lifting rod 15. A column hole 18 is formed on the surface of each load 17, and an insertion hole 19 is formed on the front end face of each load 17. The insertion hole 19 communicates with the column hole 18. The diameters of the insertion hole 19, positioning hole 16, and column hole 18 increase sequentially to ensure that the insertion rod can be inserted into the insertion hole 19, positioning hole 16, and column hole 18 in sequence. By inserting the insertion rod into the insertion hole 19 and the corresponding positioning hole 16, the load 17 can be fixed to the lifting rod 15 by insertion. At this time, the counterweight frame 13 is located in each... The top layer of load 17 consists of standard barbell plates, available in multiple weight specifications such as 2.5 / 4.5 / 5kg, with an overall counterweight capacity ≥90kg. Trainees can adjust the number of loads 17 installed as needed to adjust the overall weight of the counterweight assembly. During training, the trainee can drive the traction assembly along the track of the pulley assembly via the traction end 9 (the pulley rotates through bearings to reduce friction). The traction assembly connects to the counterweight assembly, converting the pulling force into the upward force of the counterweight, causing the counterweight to rise vertically, thus completing one exertion. Afterward, the trainee releases the pulling force, and the counterweight assembly descends under gravity. The traction assembly returns to its original position along the track of the pulley assembly, thus achieving reciprocating training. In this embodiment, the counterweight assembly is a publicly available and mature technology. The counterweight structure and method of existing fly squat racks on the market can be referenced. This embodiment is only used as a reference for one technical means.

[0099] A pair of guide cylinders 33 are fixedly connected to the top of the counterweight frame 13. The load 17 is rectangular, and guide holes 34 are opened at both ends. The guide cylinder 33 is cylindrical, and its inner diameter is equal to the diameter of the guide hole 34. The central axis of the guide cylinder 33 and the guide hole 34 at both ends of each load 17 are coincident. A pair of guide rods 35 are fixedly connected between the inner walls of the top and bottom ends of both sides of the load frame 1. The guide rods 35 pass through each guide cylinder 33 and guide hole 34 respectively. The rod diameter is equal to the inner diameter of the guide cylinder 33 and the diameter of the guide hole 34. When training, the mutual cooperation between the guide rods 35, guide cylinders 33 and guide holes 34 can play a guiding and limiting role to ensure that the counterweight assembly always moves up and down in the vertical direction, thereby avoiding swaying and tilting during training.

[0100] During training, if the ratio switching component locks the pull rope in place, the traction component can drive the movable pulley to rotate and lift the counterweight component along the pulley's trajectory. In this case, using the movable pulley saves half the force, and the pulling force is half the weight of the counterweight. However, if the ratio switching component locks the traction component in place, the second pull rope can no longer drive the movable pulley to rotate. It can only change the direction of the pulling force by using a fixed pulley, without changing the magnitude of the pulling force. In this case, the magnitude of the pulling force is equal to the weight of the counterweight. Compared to the traditional fly squat frame, this mechanism can quickly switch between 1:1 and 1:2 pulling force ratios through the ratio switching component without disassembling the pulley and rewinding the rope, making the entire switching operation more convenient and faster.

[0101] The proportional switching component switches the ratio of the tension at the traction end 9 to the weight of the load 17 between 1:1 and 1:2. When the tension is switched to 1:1 by the proportional switching component, the end of the second pull rope 7 is not under force. At this time, the weight of the counterweight component will cause the second pull rope 7 to slide down. At this time, the second pull rope 7 can be tightened by fixing the end of the second pull rope 7 to the rear side of the load-bearing frame 1 to prevent the second pull rope 7 from bending. The connection method between the second pull rope 7 and the rear side of the load-bearing frame 1 is illustrated in the following two examples. In this embodiment, a slide rail can be installed at the rear side of the load-bearing frame 1, and a counterweight can be installed at the end of the second pull rope 7. A slot is provided for the counterweight. By inserting the counterweight into the slot, the end of the second pull rope 7 can be fixed to the rear side of the load-bearing frame 1. Alternatively, a rope winder can be installed at the rear side of the load-bearing frame 1. By winding the end of the second pull rope 7 onto the rope winder, the automatic retraction of the rope winder can also fix the end of the second pull rope 7 to the rear side of the load-bearing frame 1. Of course, other methods of connecting the second pull rope 7 to the rear side of the load-bearing frame 1 can meet the same scenario requirements, solve the same problems, and achieve the same technical effect as this solution, and are all within the protection scope of this technical solution.

[0102] A method for converting rope tension ratios, implemented through a rope tension ratio conversion mechanism, includes the following steps:

[0103] S1. The locking frame 20 is provided and installed on the top of the load 17. A movable pulley 5 is installed inside the locking frame 20.

[0104] S2. Provide the tension connection assembly to connect the first pull rope 42 and the second pull rope 7 after passing through the movable pulley 5; S3. The pull rope connection component is switched between fixed limit and release via the proportional switching component 201; when fixed limit is set, the pulling force does not pass through the movable pulley 5, achieving equal force lifting; when released, the pulling force passes through the movable pulley 5, achieving effortless lifting. S4. The second pull rope 7 is wound up when it is in the fixed limit position by locking and releasing component 36 at the end of the second pull rope, and the end of the second pull rope 7 is locked to prevent loosening when it is released.

[0105] The working principle of this invention is:

[0106] In use, the trainee can adjust the number of loads 17 as needed to adjust the overall weight of the counterweight assembly. During training, the trainee can drive the traction assembly along the track of the pulley assembly via the traction end 9. The traction assembly is connected to the counterweight assembly, which can convert the pulling force into the upward force of the counterweight, causing the counterweight to rise vertically, thus completing one exertion. Afterward, the trainee releases the pulling force, and the counterweight assembly descends under the action of gravity. The traction assembly returns to its original position along the track of the pulley assembly, thus realizing reciprocating training. When training, if the U-shaped locking limit piece 23 in the proportional switching assembly is not aligned and inserted into the limit groove 11 on the side wall of the pull rope connecting assembly, the traction assembly can drive the movable pulley. 5 rotates and drives the counterweight assembly to rise through the track of the pulley assembly. At this time, using the movable pulley 5 can save 1 / 2 of the force, and the pulling force is 1 / 2 of the counterweight weight. However, if the U-shaped locking limit piece 23 is aligned and inserted into the limit groove 11 on the side wall of the pull rope connecting assembly, the traction assembly will be locked and will no longer be able to drive the movable pulley 5 to rotate. It can only change the direction of the pulling force through the fixed pulley without changing the magnitude of the pulling force. At this time, the magnitude of the pulling force is equal to the weight of the counterweight. Compared with the traditional flying bird squat frame, this mechanism can quickly switch between two pulling force ratios of 1:1 and 1:2 through the ratio switching component without disassembling the pulley and rewinding the rope, thus making the entire switching operation more convenient and faster.

[0107] The proportional switching components in this device include plug-in type, side-pull type, pull type and rotary type structures. By using proportional switching components with different structures, the rapid conversion between two tension ratios of 1:1 and 1:2 can be achieved in different ways to meet the proportional switching needs in different scenarios. Of course, other proportional switching components can meet the problem to be solved by this solution and produce the same technical effect, and all of them are within the protection scope of this technical solution.

[0108] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A rope tension ratio conversion mechanism, which is installed on a load-bearing frame (1) via a pulley assembly and a pull rope, to switch the tension of the traction end (9) and the gravity of the load (17) in a 1:1 and 1:2 ratio. Its characteristics are, include: At least one locking frame (20) is installed on top of the load (17); the locking frame (20) is equipped with a movable pulley (5) that cooperates with the first pull rope (42) from the traction end (9); A pull rope connection assembly connects the first pull rope (42) and the second pull rope (7) after passing through the movable pulley (5); The proportional switching component (201) is installed on the locking frame (20) to switch the fixed limit and release of the pull rope connection component; after the pull rope connection component is fixed and limited, the force of the pull does not pass through the movable pulley (5), and the pull force and the gravity of the load (17) rise and fall at a ratio of 1:1; after the pull rope connection component is released, the force of the pull passes through the movable pulley (5), and the pull force and the gravity of the load (17) rise and fall at a ratio of 1:2; The second pull rope tail locking and releasing component (36) is fixedly installed on the load-bearing frame (1). After the pull rope connecting component is fixed and limited, the second pull rope (7) is wound up; after the pull rope connecting component is released, the end of the second pull rope (7) is locked to prevent loosening.

2. The rope tension ratio conversion mechanism according to claim 1, characterized in that, The locking bracket (20) is provided with a power supply The first pull rope (42) passes through a rope hole (22), the diameter of which is larger than the outer diameter of the pull rope connecting assembly, so that the pull rope connecting assembly can pass upward; the upper part of the pull rope connecting assembly is provided with a first locking cavity (10) for locking the large head of the tail end of the first pull rope (42), and the lower part is provided with a second locking cavity (8) for locking the large head of the front end of the second pull rope (7).

3. The rope tension ratio conversion mechanism according to claim 2, characterized in that, The outer periphery of the pull rope connecting assembly is provided with a limiting groove (11). The proportional switching assembly (201) includes a U-shaped locking limiting member (23). By flicking, inserting, or rotating, the U-shaped locking limiting member (23) is locked in the limiting groove (11), thereby fixing the pull rope connecting assembly to the locking frame (20) and making the pull rope connecting assembly and the locking frame (20) move up and down together.

4. The rope tension ratio conversion mechanism according to claim 2, characterized in that, The pull rope connection assembly has a limiting hole (12) on at least one side. The proportional switching assembly (201) includes a plug-in post (35) corresponding to the limiting hole (12). By inserting the plug-in post into the limiting hole (12), the pull rope connection assembly and the locking frame (20) move up and down together.

5. The rope tension ratio conversion mechanism according to claim 2, characterized in that, The outer side of the pull rope connection assembly is provided with an external thread (38). The proportional switching assembly (201) includes a rotating threaded ring (39). The rotating threaded ring (39) is rotated and threaded with the external thread (38) by means of rotating threaded connection and is locked in the limiting space of the locking frame (20), thereby fixing the pull rope connection assembly on the locking frame (20) and making the pull rope connection assembly and the locking frame (20) move up and down together.

6. The rope tension ratio conversion mechanism according to claim 1, characterized in that, The second pull rope tail end locking and releasing component (36) includes a winding component (363) for locking the tail end of the second pull rope (7) and automatically winding the second pull rope (7), and a limiting component for locking the winding component (363) to prevent loosening.

7. The rope tension ratio conversion mechanism according to claim 6, characterized in that, The winding component (363) is a winding device or a weight block; the limiting component is a plug-in type, which limits and locks the winding reel in the winding device, or locks the plug-in hole provided on the side of the weight block after plugging in.

8. A rope tension ratio conversion mechanism according to claim 6, characterized in that, The winding device adopts a ratchet disc structure with a coil spring. The winding disc is a ratchet disc (363). A rotating stop (365) is set at the position of the ratchet teeth on one side of the ratchet disc (363). The rotating stop (365) is rotatably mounted on the outer shell of the winding device through a rotating sleeve (364) with an anti-deviation groove (374) on the inner wall. A plug shaft (373) with an anti-deviation protrusion is inserted into the rotating sleeve (364). The rotating sleeve (364) rotates through the plug shaft (373). The rotating stop (365) engages the ratchet teeth, and the outer end of the plug shaft (373) is provided with a snap-fit ​​anti-deviation locking structure, so that the plug shaft (373) is locked on the take-up housing; the anti-deviation locking structure includes a fork arm (371) provided at the outer end of the plug shaft (373), a positioning protrusion (372) provided at the front side of the fork arm (371), and a positioning groove provided on the side of the take-up housing that engages with the positioning protrusion (372).

9. A rope tension ratio conversion mechanism according to claim 7, characterized in that, The weight block is slidably mounted on the guide rail by a slider. The limiting component is a pin, which passes through the through hole on the load-bearing frame and corresponds to the limiting locking hole on the weight block to lock and limit the weight block. The weight block is used to counteract the gravity of the second pull rope (7) to prevent slack.

10. A method for converting the proportion of rope tension, implemented by the rope tension conversion mechanism as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Provide the locking frame (20) and install it on the top of the load (17). The locking frame (20) is equipped with a movable pulley (5). S2. Provide the tension connection assembly to connect the first pull rope (42) and the second pull rope (7) after passing through the movable pulley (5). S3. The pull rope connection component is fixed or released by the proportional switching component (201); when fixed, the pulling force does not pass through the movable pulley (5) to achieve equal force lifting; when released, the pulling force passes through the movable pulley (5) to achieve labor-saving lifting. S4. The second pull rope (7) is wound up when it is in the fixed limit position by locking the release component (36) at the end of the second pull rope, and the end of the second pull rope (7) is locked to prevent loosening when it is released.

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