A pull-back muscle trainer for sports training

Abstract

This utility model discloses a pull-back muscle trainer for sports training, including two pull frames. A fixed rod is fixedly connected to the side wall of each pull frame, and two rotating wheels are rotatably connected to the fixed rod. A base is slidably connected to the side wall of each pull frame, and several weight blocks are placed on the base. A tension rope is fixedly connected to the upper end of each weight block, and a tension rod is fixedly connected to the end of the tension rope away from the weight block. Two pull rings are fixedly connected to the tension rod. This utility model has a reasonable structure. Through a rotating mechanism, rotating two screws inside the pull frame synchronously drives the nuts to move. A first rack drives a gear to rotate, pushing a second rack in the opposite direction, realizing the opposite movement of the tension rod and the base. This facilitates height adjustment while maintaining the overall displacement of the base and the weight blocks. When weight adjustment is needed, the user can easily add or remove weight blocks by pulling the fixed rod without resetting the height of the tension rod, effectively improving training flexibility and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of training equipment technology, and in particular to a pull back muscle trainer for sports training. Background Technology

[0002] With the fast pace of modern life, health issues are becoming increasingly prominent. Seeking relaxation and muscle relief, people are flocking to gyms, utilizing various training equipment, such as resistance band back muscle trainers, for exercise. This method not only effectively relieves stress but also strengthens back muscles and promotes overall health.

[0003] A search revealed a high-tension back muscle trainer for physical education, patent number "CN211357603U". This trainer involves rotating a bolt in the opposite direction to move a slider to the desired height based on the student's desired height, then rotating the bolt in the forward direction to contact the guard plate and fix the limiting block at that height. However, after adjusting the height, if the student finds it uncomfortable after trying a certain weight, the height needs to be returned to the initial position to readjust the weight, reducing training efficiency. Furthermore, after adjusting the weight, the student usually needs to readjust the height of the limiting block to ensure it is in a suitable training position. This repetitive adjustment process not only increases the operational burden but also affects the student's training rhythm and mood. Therefore, this application proposes a high-tension back muscle trainer for physical education. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pull-back muscle trainer for sports training.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A back muscle pull training device for sports training includes two pull frames. A fixed rod is fixedly connected to the side wall of each pull frame, and two rotating wheels are rotatably connected to the fixed rod. A base is slidably connected to the side wall of each pull frame, and several weight blocks are placed on the base. A tension rope is fixedly connected to the upper end of each weight block, and a tension rod is fixedly connected to the end of the tension rope away from the weight block. Two pull rings are fixedly connected to the tension rod. A weight-adding mechanism for increasing the weight of the weight blocks is installed on the base. A second groove is formed in the side wall of each pull frame, and the tension rod is inserted into the second groove. The base has two long plates fixedly connected to its side wall, and the tension frame has a first groove on its side wall. The long plates slide in adjacent first grooves. A screw is rotatably connected inside the tension frame. A rotating mechanism for rotating the screw is installed on the tension frame. A nut is threaded onto the screw. A first rack is rotatably connected to the side wall of the nut. A limit plate is fixedly connected to the side wall of the first rack. A gear is rotatably connected to the inner wall of the tension frame. A second rack is slidably connected inside the tension frame. The gear meshes with the first rack and the second rack respectively.

[0007] Preferably, the inner wall of the tension frame is provided with a second sliding groove, and the nut sidewall is fixedly connected with a second slider, which slides within the second sliding groove.

[0008] Preferably, the weight-adding mechanism includes an L-shaped plate and a pull rod. The L-shaped plate is fixedly installed on the side wall of the weight-adding block, and the pull rod is slidably installed on the L-shaped plate. The side wall of the weight-adding block has two fixing holes, and the pull rod slides within the fixing holes.

[0009] Preferably, the rotating mechanism includes a first pulley, a belt, and a second pulley. The second pulley is rotatably mounted on the upper end of the tension frame, and the first pulley is rotatably mounted on the upper end of another tension frame. The screw is fixedly connected to the second pulley and the first pulley, respectively, and the belt is mounted on the first pulley and the second pulley.

[0010] Preferably, the inner sidewall of the tension frame is provided with a first sliding groove, and the second rack sidewall is fixedly connected with a first slider, which slides in the first sliding groove.

[0011] Preferably, a motor frame is fixedly connected to the upper end of the tension frame, a motor is fixedly connected to the upper end of the motor frame, and the output shaft of the motor is fixedly connected to the second pulley.

[0012] This utility model has the following beneficial effects:

[0013] The rotating mechanism causes the two screws inside the tension frame to rotate simultaneously, which in turn moves the nut. This movement, via the first rack, drives the gear to rotate, causing the second rack to move in the opposite direction to the first rack. Consequently, the tension rod moves in the opposite direction to the base. This allows the base to move all the weight blocks as a whole when the height of the tension rod is adjusted. When students are not used to the weight of the weight blocks, they can directly pull the lever to increase or decrease the number of weight blocks, avoiding the need to return the tension rod to its initial height when adjusting the weight of the weight blocks, thus increasing training efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a pull-back muscle trainer for sports training proposed in this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the tension frame, motor frame, second pulley, and motor proposed in this utility model.

[0016] Figure 3 This is a frontal cross-sectional structural diagram of the tension frame proposed in this utility model;

[0017] Figure 4 This is a side view of the cross-sectional structure of the tension frame proposed in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the weight-adding block, base, and long plate proposed in this utility model.

[0019] Figure 6 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0020] In the diagram: 1. Tension frame, 2. Motor frame, 3. First pulley, 4. Belt, 5. Fixing rod, 6. Rotary wheel, 7. Tension rope, 8. Tension rod, 9. Weighting block, 10. Base, 11. Second groove, 12. First groove, 13. Second pulley, 14. Screw, 15. Nut, 16. First rack, 17. Limiting plate, 18. First slide groove, 19. First slider, 20. Second rack, 21. Gear, 22. Fixing hole, 23. Long plate, 24. Second slider, 25. Second slide groove, 26. L-shaped plate, 27. Pull rod, 28. Pull ring, 29. Motor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-6A back muscle pull training device for sports training includes two pull frames 1. A fixed rod 5 is fixedly connected to the side wall of the pull frame 1. Two rotating wheels 6 are rotatably connected to the fixed rod 5. It should be noted that the setting of the rotating wheels 6 can reduce the friction force generated by the pull rope 7 on the fixed rod 5, thereby helping the student to pull the pull rod 8.

[0023] A base 10 is slidably connected to the side wall of the tension frame 1. Several weight blocks 9 are placed on the base 10. A tension rope 7 is fixedly connected to the upper end of the weight block 9. A tension rod 8 is fixedly connected to the end of the tension rope 7 away from the weight block 9. Two pull rings 28 are fixedly connected to the tension rod 8. A weighting mechanism for increasing the weight of the weight block 9 is installed on the base 10. The weighting mechanism includes an L-shaped plate 26 and a pull rod 27. The L-shaped plate 26 is fixedly installed on the side wall of the weight block 9. The pull rod 27 is slidably installed on the L-shaped plate 26. Two fixing holes 22 are opened on the side wall of the weight block 9. The pull rod 27 slides in the fixing holes 22.

[0024] The tension frame 1 has a second groove 11 on its side wall, and the tension rod 8 slides within the second groove 11. Two long plates 23 are fixedly connected to the side wall of the base 10. The tension frame 1 has a first groove 12 on its side wall, and the long plates 23 slide within adjacent first grooves 12. A screw 14 is rotatably connected inside the tension frame 1. A rotating mechanism for rotating the screw 14 is installed on the tension frame 1. The rotating mechanism includes a first pulley 3, a belt 4, and a second pulley 13. The second pulley 13 is rotatably mounted on the upper end of the tension frame 1, and the first pulley 3 is rotatably mounted on the upper end of another tension frame 1. The screw 14 is fixedly connected to both the second pulley 13 and the first pulley 3, and the belt 4 is mounted on both the first pulley 3 and the second pulley 13. It should be noted that the rotating mechanism causes the two screws 14 to rotate simultaneously, preventing asynchronous rotation that could lead to asynchronous movement of the tension rod 8 and the base 10, thus avoiding tilting of the base 10 and causing the weight block 9 to fall off.

[0025] A nut 15 is threaded onto the screw 14. A first rack 16 is rotatably connected to the side wall of the nut 15. A limit plate 17 is fixedly connected to the side wall of the first rack 16. It should be noted that when the student pulls the tension rod 8, it slides within the limit plate 17. The side wall of the limit plate 17 can limit the tension rod 8. At the same time, when the student does not pull the tension rod 8, the side wall of the limit plate 17 fixes the tension rod 8.

[0026] A gear 21 is rotatably connected to the inner wall of the tension frame 1, and a second rack 20 is slidably connected inside the tension frame 1. The gear 21 meshes with the first rack 16 and the second rack 20 respectively. It should be noted that the rotation of the gear 21 causes the first rack 16 and the second rack 20 to move in opposite directions. Thus, when adjusting the height of the tension rod 8, the second rack 20 drives the base 10, causing all the weight blocks 9 to move as a whole. Therefore, when students need to adjust the weight of the weight blocks 9, they can simply pull the fixing rod 27 and insert it into the corresponding fixing hole 22.

[0027] The inner wall of the tension frame 1 is provided with a second slide groove 25, and the nut 15 is fixedly connected to the side wall with a second slider 24, which slides in the second slide groove 25.

[0028] The inner side wall of the tension frame 1 is provided with a first sliding groove 18, and the side wall of the second rack 20 is fixedly connected with a first slider 19, which slides in the first sliding groove 18.

[0029] A motor frame 2 is fixedly connected to the upper end of the tension frame 1, and a motor 29 is fixedly connected to the upper end of the motor frame 2. The output shaft of the motor 29 is fixedly connected to the second pulley 13.

[0030] In this invention, the starting motor 29 rotates forward, driving the second pulley 13 to rotate. The second pulley 13 drives the first pulley 3 to rotate via the belt 4, thereby causing the two screws 14 to rotate synchronously. Since the second slider 24 slides within the second groove 25, the rotation of the screws 14 causes the nut 15 to move downward along the second groove 25. The nut 15 drives the limiting plate 17 downward via the first rack 16, thus lowering the height of the tension rod 8. The first rack 16 meshes with the gear 21, and the downward movement of the first rack 16 causes the gear 21 to rotate counterclockwise. Since the gear 21 also meshes with the second rack 20, the counterclockwise rotation of the gear 21 causes the second rack 20 to move upward. This causes the second rack 20 to drive the base 10 upward via the long plate 23, and all the weight blocks 9 on the base 10 also move upward. When the height is adjusted to a suitable level for the student, the rotation of the motor 29 is stopped. The weight of the weight-adding block 9 can be reduced or increased by pulling the fixing rod 27 out of or inserting it into the corresponding fixing hole 22. To raise the height of the tension rod 8, the motor 29 needs to be rotated in the opposite direction.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A back muscle training device for sports training, comprising two pull-up frames (1), characterized in that, The side wall of the tension frame (1) is fixedly connected with a fixed rod (5), two rotating wheels (6) are rotatably connected on the fixed rod (5), a base (10) is slidably connected on the side wall of the tension frame (1), a plurality of weight blocks (9) are placed on the base (10), the upper end of each weight block (9) is fixedly connected with a tension rope (7), the end of the tension rope (7) away from the weight block (9) is fixedly connected with a tension rod (8), two pull rings (28) are fixedly connected on the tension rod (8), a weight adding mechanism for adding the weight of the weight block (9) is installed on the base (10), a second groove (11) is formed in the side wall of the tension frame (1), the tension rod (8) slides in the second groove (11), two long plates (23) are fixedly connected on the side wall of the base (10), a first groove (12) is formed in the side wall of the tension frame (1), the long plates (23) slide in the adjacent first grooves (12), a screw rod (14) is rotatably connected in the tension frame (1), a rotating mechanism for rotating the screw rod (14) is installed on the tension frame (1), a nut (15) is threadedly connected on the screw rod (14), a first rack (16) is rotatably connected on the side wall of the nut (15), a limiting plate (17) is fixedly connected on the side wall of the first rack (16), a gear (21) is rotatably connected on the inner wall of the tension frame (1), a second rack (20) is slidably connected in the tension frame (1), the gear (21) is engaged with the first rack (16) and the second rack (20) respectively.

2. The back muscle training device according to claim 1, wherein A second sliding groove (25) is formed in the inner wall of the tension frame (1), a second sliding block (24) is fixedly connected on the side wall of the nut (15), and the second sliding block (24) slides in the second sliding groove (25).

3. The back muscle training device according to claim 1, wherein The weight adding mechanism comprises an L-shaped plate (26) and a pull rod (27), the L-shaped plate (26) is fixedly installed on the side wall of the weight block (9), the pull rod (27) is slidably installed through the L-shaped plate (26), two fixed holes (22) are formed in the side wall of the weight block (9), and the pull rod (27) slides in the fixed holes (22).

4. The back muscle training device for sports training according to claim 1, wherein The rotating mechanism comprises a first belt pulley (3), a belt (4) and a second belt pulley (13), the second belt pulley (13) is rotatably installed on the upper end of the tension frame (1), the first belt pulley (3) is rotatably installed on the upper end of the other tension frame (1), the screw rod (14) is fixedly connected with the second belt pulley (13) and the first belt pulley (3) respectively, and the belt (4) is installed on the first belt pulley (3) and the second belt pulley (13).

5. The back muscle training device for sports training according to claim 1, wherein A first sliding groove (18) is formed in the inner side wall of the tension frame (1), a first sliding block (19) is fixedly connected on the side wall of the second rack (20), and the first sliding block (19) slides in the first sliding groove (18).

6. The back muscle training device for sports training according to claim 1, wherein A motor frame (2) is fixedly connected on the upper end of the tension frame (1), a motor (29) is fixedly connected on the upper end of the motor frame (2), and the output shaft of the motor (29) is fixedly connected with the second belt pulley (13).

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