Tension switching device

Abstract

The utility model relates to a tension switching device, which belongs to the technical field of fitness equipment and comprises a frame body, a balancing weight is movably arranged on the frame body, and the balancing weight is detachably connected with a movable pulley. An upper fixed pulley and a lower fixed pulley are fixed on the frame body; a rope is wound on the movable pulley, the rope on one side of the movable pulley is connected to a handle, the rope on the other side of the movable pulley sequentially bypasses the upper fixed pulley and the lower fixed pulley and then is fixed on a connecting piece, and the connecting piece is detachably connected with the movable pulley; according to the utility model, the connecting piece is detachably connected with the movable pulley, so that the output pulling force of the balancing weight is switched; under the condition of the same training pulling force requirement, the number of balancing weights required by the comprehensive pulling force training device is smaller, the production cost of the training device is reduced, the total weight of the training device is reduced, the comprehensive pulling force training device is more convenient to move and carry, and the transportation cost is reduced.

Description

Technical Field

[0001] The utility model relates to a tension switching device, belonging to the technical field of fitness equipment. Background Art

[0002] The comprehensive tension trainer is a multifunctional fitness equipment, which integrates a variety of training functions and can exercise different muscle groups. This device usually includes an adjustable resistance system, various grips and brackets, as well as accessories for simulating different movement actions. Users can perform targeted strength training by changing the grip position and using different accessories, thereby improving muscle strength, endurance and coordination.

[0003] The counterweight is an indispensable part of the comprehensive tension trainer. The rope passes around multiple sets of pulleys and is connected to the counterweight. Users can change the magnitude of the tension by adjusting the weight of the counterweight according to their own needs. The existing comprehensive tension trainers are all equipped with movable pulleys. Due to the principle of labor-saving of the movable pulley, when performing tension training, the force required to lift the counterweight is only half of the gravity of the counterweight. Therefore, in order to achieve a greater tension output, the manufacturer can only equip more counterweights, which not only increases the production cost of the comprehensive tension trainer, but also increases the total weight of the comprehensive tension trainer, making the trainer more cumbersome, inconvenient to move and transport, and increasing the transportation cost. Summary of the Utility Model

[0004] According to the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a tension switching device, which can change the tension output by the counterweight, so that the output tension is equal to the gravity of the counterweight itself or half of its own gravity. In the case of the same training tension, fewer counterweights need to be configured, reducing the production and transportation costs of the trainer.

[0005] The tension switching device described in the utility model includes a frame body, on which a counterweight is movably arranged, and the counterweight is detachably connected to a movable pulley; an upper fixed pulley and a lower fixed pulley are fixed on the frame body, the position of the upper fixed pulley is higher than that of the movable pulley, and the position of the lower fixed pulley is lower than that of the movable pulley;

[0006] A rope is wound around the movable pulley, one side of the rope of the movable pulley is connected to a handle, and the rope on the other side of the movable pulley sequentially passes around the upper fixed pulley and the lower fixed pulley and then is fixed on a connecting piece. The connecting piece is movable, and a support piece is arranged below the connecting piece, and the support piece is used to limit the lower limit position of the connecting piece; the connecting piece is detachably connected to the movable pulley.

[0007] Preferably, a guide shaft is fixed on the frame body, and the counterweight is slidably connected to the guide shaft; a pull rod is suspended below the movable pulley, and the counterweight is detachably connected to the movable pulley through the pull rod; the connecting piece is detachably connected to the movable pulley through the pull rod.

[0008] Preferably, the connecting member is connecting member A and the tie rod is tie rod A; connecting member A includes an inner core and an outer cylinder. The outer cylinder is sleeved outside the inner core and fixedly connected to the inner core; the inner core is fixedly connected to the end of the rope.

[0009] Further, a boss is provided on the inner wall of the outer cylinder, and a groove matching with the boss is opened at the bottom of tie rod A. The groove is in an inverted L shape, and the long side of the groove communicates to the end position of tie rod A; align the boss on the outer cylinder with the groove on tie rod A and insert it, then rotate the outer cylinder to connect tie rod A with connecting member A together.

[0010] Preferably, the connecting member is connecting member B and the tie rod is tie rod B; a hook is provided on connecting member B, and a hanging ring matching with the hook is provided at the bottom of tie rod B.

[0011] Preferably, the connecting member is connecting member C and the tie rod is tie rod C. An internal thread is provided on connecting member C, and an external thread matching with the internal thread is provided at the bottom of tie rod C.

[0012] Preferably, the connecting member is connecting member D and the tie rod is tie rod D. A ball head is provided on connecting member D, and an opening groove matching with the ball head is provided at the bottom of tie rod D.

[0013] Preferably, a plurality of counterweight connection holes are provided on the tie rod, through holes are provided on the side of the counterweight, the positions of the counterweight connection holes correspond to the positions of the through holes of the counterweight, and the tie rod is connected to the counterweight through the counterweight connection holes; insert a pin shaft through the through hole of the counterweight and through the counterweight connection hole on the tie rod to connect the tie rod and the counterweight.

[0014] Further, after the rope on the side close to the force application of the movable pulley extends upward, it bypasses a plurality of fixed pulleys and is finally connected to a handle. The handle is limited by a flying bird sliding sleeve, and the flying bird sliding sleeve is rotatably connected to a sliding sleeve connecting member to adapt to the change of the force application direction.

[0015] Preferably, the sliding sleeve connecting member is slidably arranged on the adjusting longitudinal beam of the frame body. The adjusting longitudinal beam is a square tube profile, a plurality of adjusting holes are provided on the adjusting longitudinal beam, and a spring pin is provided on the sliding sleeve connecting member and connected to the adjusting longitudinal beam through the spring pin; when it is necessary to adjust the height of the flying bird sliding sleeve, pull out the spring pin outward to separate it from the adjusting longitudinal beam. After adjusting to a suitable height, release the spring pin, and the spring inside the spring pin makes it reset and locks the spring pin to the adjusting longitudinal beam again.

[0016] Preferably, a support sleeve is provided at the bottom of the guide shaft. The support sleeve is used to support the counterweight, and a shock pad for shock absorption is provided above the support sleeve.

[0017] The beneficial effects of the present utility model compared with the prior art are:

[0018] For the tension switching device described in the present utility model, by providing a connecting member, the connecting member is detachably connected to the movable pulley to achieve the switching of the tension output by the counterweight; when the connecting member is connected to the pull rod, the tension output by the counterweight is equal to its own gravity, and when the connecting member is disconnected from the pull rod, the tension output by the counterweight is equal to half of its own gravity; in the case of the same training tension requirement, the present utility model can reduce the number of counterweights required for the comprehensive tension trainer, not only reducing the production cost of the trainer, but also reducing the total weight of the trainer, making it more convenient to move and carry, and reducing the transportation cost. Description of the Drawings

[0019] Figure 1 is the structural schematic diagram of Embodiment 1 of the present utility model;

[0020] Figure 2 is the front view of Embodiment 1 of the present utility model;

[0021] Figure 3 is the cross-sectional view of the front view of Embodiment 1 of the present utility model;

[0022] Figure 4 is Figure 1 the partial enlarged view of area E in

[0023] Figure 5 is the structural schematic diagram of connecting member A;

[0024] Figure 6 is the three-dimensional view of pull rod A;

[0025] Figure 7 is the structural schematic diagram of connecting member B;

[0026] Figure 8 is the three-dimensional view of pull rod B;

[0027] Figure 9 is the structural schematic diagram of connecting member C;

[0028] Figure 10 is the three-dimensional view of pull rod C;

[0029] Figure 11 is the structural schematic diagram of connecting member D;

[0030] Figure 12 is the three-dimensional view of pull rod D;

[0031] Figure 13 is the schematic diagram of the force analysis when the tension output by the counterweight is equal to half of its own gravity;

[0032] Figure 14 is the schematic diagram of the force analysis when the tension output by the counterweight is equal to its own gravity.

[0033] In the figure: 1. Frame; 101. Guide shaft; 102. Support sleeve; 103. Support member; 104. Adjusting longitudinal beam; 1041. Adjusting hole; 105. Shock pad; 2. Moving pulley; 3. Counterweight; 4. Lower fixed pulley; 5. Connecting member A; 501. Outer cylinder; 5011. Boss; 502. Inner core; 6. Sliding sleeve connecting member; 601. Spring pin; 7. Flying bird sliding sleeve; 8. Upper fixed pulley; 9. Pull rod A; 901. Groove; 902. Counterweight connection hole; 10. Connecting member B; 1001. Hook; 11. Pull rod B; 1101. Sling; 12. Connecting member C; 1201. Internal thread; 13. Pull rod C; 1301. External thread; 14. Connecting member D; 1401. Ball head; 15. Pull rod D; 1501. Open slot. Specific implementation manner

[0034] Embodiment 1

[0035] As Figures 1 to 6 shown, the tension switching device described in this embodiment is realized through the following technical solutions: It includes a frame 1, on which a counterweight 3 is movably arranged, and the counterweight 3 is detachably connected to the moving pulley 2; an upper fixed pulley 8 and a lower fixed pulley 4 are fixed on the frame 1, the position of the upper fixed pulley 8 is higher than the position of the moving pulley 2, and the position of the lower fixed pulley 4 is lower than the position of the moving pulley 2;

[0036] A rope is wound around the moving pulley 2, one side of the rope of the moving pulley 2 is connected to a handle, and the rope on the other side of the moving pulley 2 sequentially passes around the upper fixed pulley 8 and the lower fixed pulley 4 and then is fixed on the connecting member A 5. The connecting member A 5 is movable, and a support member 103 is provided below the connecting member A 5. The support member 103 is fixed to the lower part of the frame 1 and is used to limit the lower limit position of the connecting member A 5; the connecting member A 5 is detachably connected to the moving pulley 2.

[0037] In this embodiment, two guide shafts 101 are fixed on the frame 1. The two guide shafts are arranged in parallel, and the counterweight 3 is slidably connected to the guide shafts 101; a pull rod A 9 is suspended below the moving pulley 2, and the counterweight 3 is detachably connected to the moving pulley 2 through the pull rod A 9; the connecting member A 5 is detachably connected to the moving pulley 2 through the pull rod A 9.

[0038] The connecting member A 5 includes an inner core 502 and an outer cylinder 501. The outer cylinder 501 is sleeved outside the inner core 502 and is fixedly connected to the inner core 502; the inner core 502 is fixedly connected to the end of the rope.

[0039] A boss 5011 is provided on the inner wall of the outer cylinder 501. A groove 901 that matches the boss 5011 is provided at the bottom of the pull rod A9. The groove 901 is in an inverted L shape, and the long side of the groove 901 communicates with the end position of the pull rod A9. Align the boss 5011 on the outer cylinder 501 with the groove 901 on the pull rod A9 and insert it, then rotate the outer cylinder 501 to connect the pull rod A9 with the connector A5. A number of counterweight connection holes 902 are provided on the pull rod A9. A through hole runs through the side of the counterweight 3. The position of the counterweight connection hole 902 corresponds to the position of the through hole of the counterweight 3. The pull rod A9 is connected to the counterweight 3 through the counterweight connection hole 902. Insert the pin shaft through the through hole of the counterweight 3 and through the counterweight connection hole 902 on the pull rod A9 to connect the pull rod A9 with the counterweight 3.

[0040] After the rope on the side of the movable pulley 2 close to the force application extends upward, it bypasses a plurality of fixed pulleys and finally connects to the handle. The handle is limited by the flying bird sliding sleeve 7. The flying bird sliding sleeve 7 is rotatably connected to the sliding sleeve connector 6 to adapt to the change of the force application direction. The sliding sleeve connector 6 is slidably arranged on the adjusting longitudinal beam 104 of the frame body 1. The adjusting longitudinal beam 104 is a square tube profile. A number of adjusting holes 1041 are provided on the adjusting longitudinal beam 104. A spring pin 601 is provided on the sliding sleeve connector 6 and is connected to the adjusting longitudinal beam 104 through the spring pin 601. When it is necessary to adjust the height of the flying bird sliding sleeve 7, pull out the spring pin 601 outward to separate it from the adjusting longitudinal beam 104. After adjusting to the appropriate height, release the spring pin 601. The spring inside the spring pin 601 makes it reset and locks the spring pin 601 to the adjusting longitudinal beam 104 again. A support sleeve 102 is provided at the bottom of the guide shaft 101. The support sleeve 102 is used to support the counterweight 3. A shock pad 105 for shock absorption is provided above the support sleeve 102.

[0041] The working principle of the present utility model is as follows:

[0042] When the user needs the pulling force output by the counterweight 3 to be equal to half of its own gravity, it is necessary to separate the pull rod A9 from the connector A5. As Figure 13 shown, at this time, the pulling force that the user needs to apply is F1, and the gravity G of the counterweight 3 = F1 + F2, that is, the sum of the pulling forces on both sides of the movable pulley 2, and F1 = F2. Therefore, the pulling force at the handle end is half of the gravity of the counterweight 3.

[0043] When the user needs the pulling force output by the counterweight 3 to be equal to its own gravity, it is necessary to connect the pull rod A9 with the connector A5. As Figure 14 shown, at this time, the pulling force that the user needs to apply is F3, F3 + F4 = G + F5. Because F4 and F5 are the pulling forces on the same rope, they are equal in magnitude and opposite in direction. Therefore, G = F3. At this time, the pulling force at the handle end is equal to the gravity of the counterweight 3.

[0044] Example 2

[0045] As Figures 7 to 8 shown, the connecting member is connecting member B10, and the tie rod is tie rod B11; a hook 1001 is provided on the connecting member B10, and a hanging ring 1101 that matches the hook 1001 is provided at the bottom of the tie rod B11.

[0046] Example 3

[0047] As Figures 9 to 10 shown, the connecting member is connecting member C12, and the tie rod is tie rod C13; an internal thread 1201 is provided on the connecting member C12, and an external thread 1301 that matches the internal thread 1201 is provided at the bottom of the tie rod C13.

[0048] Example 4

[0049] As Figures 11 to 12 shown, the connecting member is connecting member D14, and the tie rod is tie rod D15; a ball head 1401 is provided on the connecting member D14, and an opening groove 1501 that matches the ball head 1401 is provided at the bottom of the tie rod D15.

Claims

1. A tension switching device, characterized in that: The invention comprises a frame (1), a counterweight (3) is movably arranged on the frame (1), and the counterweight (3) is detachably connected to a movable pulley (2); an upper fixed pulley (8) and a lower fixed pulley (4) are fixed on the frame (1), the position of the upper fixed pulley (8) is higher than the position of the movable pulley (2), and the position of the lower fixed pulley (4) is lower than the position of the movable pulley (2); A rope is wound around the movable pulley (2), the rope on one side of the movable pulley (2) is connected to the handle, and the rope on the other side of the movable pulley (2) is successively wound around the upper fixed pulley (8) and the lower fixed pulley (4) and then fixed to the connecting member. The connecting member is movable, and a support member (103) for limiting the lower limit position of the connecting member is provided below the connecting member. The connecting member and the movable pulley (2) are detachably connected.

2. The tension switching device according to claim 1, characterized in that: A guide shaft (101) is fixed on the frame (1), and the counterweight (3) is slidably connected to the guide shaft (101); a pull rod is suspended below the movable pulley (2), and the counterweight (3) is detachably connected to the movable pulley (2) via the pull rod; and the connecting piece is detachably connected to the movable pulley (2) via the pull rod.

3. The tension switching device according to claim 2, characterized in that: The connecting member is a connecting member A (5), and the pull rod is a pull rod A (9); the connecting member A (5) comprises an inner core (502) and an outer tube (501), the outer tube (501) is sleeved on the outside of the inner core (502), and is fixedly connected to the inner core (502); the inner core (502) is fixedly connected to the end of the rope; a boss (5011) is provided on the inner wall of the outer tube (501), and a groove (901) matching the boss (5011) is provided at the bottom of the pull rod A (9), the groove (901) is in an inverted L shape, and the long side of the groove (901) is connected to the end position of the pull rod A (9).

4. The tension switching device according to claim 2, characterized in that: The connecting piece is a connecting piece B (10), and the pull rod is a pull rod B (11); a hook (1001) is provided on the connecting piece B (10), and a lifting ring (1101) matching with the hook (1001) is provided at the bottom of the pull rod B (11).

5. The tension switching device according to claim 2, characterized in that: The connecting piece is the connecting piece C (12), the pull rod is the pull rod C (13), the connecting piece C (12) is provided with an internal thread (1201), and the bottom of the pull rod C (13) is provided with an external thread (1301) matching the internal thread (1201).

6. The tension switching device according to claim 2, characterized in that: The connecting piece is a connecting piece D (14), the pull rod is a pull rod D (15), a ball head (1401) is provided on the connecting piece D (14), and an open groove (1501) matching with the ball head (1401) is provided at the bottom of the pull rod D (15).

7. The tension switching device according to claim 2, characterized in that: The pull rod is provided with a plurality of counterweight block connection holes (902), and the side of the counterweight block (3) is provided with a through hole, the position of the counterweight block connection hole (902) corresponds to the position of the counterweight block through hole, and the pull rod is connected to the counterweight block (3) through the counterweight block connection hole (902).

8. The tension switching device according to claim 1, characterized in that: After the rope of the movable pulley (2) close to the force-applying side extends upward, it passes around a plurality of fixed pulleys and is connected to a handle. The handle is limited by a flying bird sliding sleeve (7), and the flying bird sliding sleeve (7) is rotatably connected to a sliding sleeve connector (6).

9. The tension switching device according to claim 8, characterized in that: The sliding sleeve connecting piece (6) is slidably arranged on the adjusting longitudinal beam (104) of the frame body. The adjusting longitudinal beam (104) is a square tube profile. The adjusting longitudinal beam (104) is provided with a plurality of adjusting holes (1041). The sliding sleeve connecting piece (6) is provided with a spring pin (601) and is connected to the adjusting longitudinal beam (104) via the spring pin (601).

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