Automatic traction device for lower limb fracture

Abstract

The lower limb fracture automatic traction device comprises a supporting frame, an opening is formed in the surface of the supporting frame, and a supporting plate is fixedly connected to the surface of the opening of the supporting frame. The automatic traction device for the lower limb fracture is provided with foot limiting blocks and a fastening belt, when the device works, a user enables the foot to penetrate through the fastening belt and place the foot between the foot limiting blocks, then a first gear is driven to rotate through a third motor, the output end of the third motor drives one end of the fastening belt to rotate and be wound, and the other end of the fastening belt is driven to rotate. Meanwhile, a first gear rotates to drive a second gear to rotate, the second gear drives a third lead screw and foot limiting blocks to slide through threads, and the feet of the user can be conveniently fixed after the foot limiting blocks are combined; and therefore, the fixation of the device on the feet of the user during working is improved, the stability during working is improved, and the traction effect is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to an automatic traction device for lower limb fractures. Background Art

[0002] The lower limbs need a high degree of stability for walking and weight-bearing, and the two lower limbs should be of equal length. If the length difference is more than 2 cm, it will affect walking. The greater the difference, the more serious the impact. Therefore, the following characteristics should be noted when treating lower limb fractures. The requirements for reduction should be high, and the axis alignment should be close to normal. Because the greater the angular deformity, the greater the impact on joint movement, load-bearing line and limb length. The fixation time is longer, and weight-bearing should not be started until the bone heals firmly to prevent deformity and re-fracture due to premature weight-bearing. Because the thigh muscles are more developed and have strong contraction force, femoral fractures are fixed with plaster or a small splint after manual reduction. It is not easy to maintain alignment and requires continuous traction treatment. The lower limb traction frame medical device is mainly used for traction, fixation and support of the lower limbs. It usually consists of two brackets and a traction device. The bracket can fix On the bed or wall, the traction device can be used to pull the lower limbs. The use of a lower limb traction frame can effectively treat diseases such as fractures, joint dislocations, and joint instability. During the traction process, the patient needs to lie flat or sit, place the lower limbs on the bracket, and then use the traction device to pull the lower limbs. This can effectively restore the physiological curvature of the lower limbs, promote fracture healing and joint reduction. In addition, the lower limb traction frame can also be used for postoperative rehabilitation therapy, such as postoperative muscle relaxation and recovery. During rehabilitation therapy, patients can use the lower limb traction frame to perform active or passive muscle movements to promote muscle recovery and functional reconstruction. In short, the lower limb traction frame is a very practical medical device that can help patients with effective treatment and rehabilitation and improve their quality of life.

[0003] Bone traction is the direct traction of bones by round needles, so as to effectively reduce and fix patients with fractures and dislocations. It is often used for patients with skin injuries, severe swelling, wound infection or severe bone comminution who are not suitable for internal fixation. The main methods include: skull traction, ulna olecranon traction, supracondylar traction, tibial tuberosity traction, calcaneal traction, etc. Daily observation to avoid excessive traction, replace traction needles after 8 weeks, and strengthen care during traction to prevent complications. In the clinical process of orthopedics, there are many patients with lower limb fractures or displaced fractures of the lower limbs due to trauma or other reasons. Lower limb bone traction treatment is extremely important for lower limb fractures, especially displaced fractures of the lower limbs. Patients with lower limb fractures Due to the difficulty in moving the lower limbs, the lower limbs are often kept in a posture for a long time, which is not conducive to the rehabilitation of the lower limbs and is also prone to cause joint stiffness, muscle spasms, and even skin necrosis, requiring traction of the lower limbs. When the existing lower limb fracture traction device is used, such as the lower limb fracture traction rehabilitation device disclosed in publication number "CN201921427353.4", the receiving plate is set as a structure in which the top plate and the extension plate cooperate, so that the length of the receiving plate can be adjusted according to the patient's body length to meet the needs of patients with different leg lengths. However, it is not convenient to limit the support of the user's feet during work, resulting in uneven overall force, which is not conducive to the traction effect and reduces practicality. Summary of the invention

[0004] The object of the present invention is to provide an automatic traction device for lower limb fractures to solve the problem proposed in the above-mentioned background technology that a receiving plate is set as a structure that cooperates with a top plate and an extension plate, so that the length of the receiving plate can be adjusted according to the patient's body length to meet the needs of patients with different leg lengths. However, it is not convenient to provide limited support for the user's feet during operation, resulting in uneven overall force, which is not conducive to the traction effect and reduces the practicality.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an automatic traction device for lower limb fractures, comprising a support frame, a surface of which is provided with an opening, the surface of the opening of the support frame is fixedly connected to a support plate, the upper surface of the support plate is fixedly connected to two electric push rods, the output end of the electric push rod passes through the surface of the support plate, and the output end of the electric push rod is fixedly connected to a linkage slide plate, the surface of the linkage slide plate is provided with two slide grooves, and the inner wall of the linkage slide groove is fixedly installed with a first motor, the inner wall of the linkage slide groove is rotatably connected with a first screw rod, the inner wall of the linkage slide groove is slidably connected with a positioning slider, the side surface of the positioning slider is penetrated and installed with an adjusting stud, the upper surface of the positioning slider is provided with a groove, and the inner wall of the positioning slider groove is slidably connected with two clamping blocks, and the interior of the positioning slider is provided with a linkage anti-skid mechanism, which drives the first magnet through the linkage block to repel the second magnet and the piston column to slide and push air into the stabilizing airbag for expansion and anti-skid.

[0006] Preferably, the linkage slide plate is slidably connected to the support plate, the output end of the first motor is fixedly connected to the rotating shaft of the first screw rod, and the first screw rod is threadedly connected to the positioning slider.

[0007] By adopting the above technical scheme, the sliding connection between the linkage slide and the support plate facilitates the vertical movement of the linkage slide, thereby facilitating traction adjustment, and the first screw rod is driven to rotate by the output end of the first motor, so that the first screw rod increases the thread to drive the positioning slider to slide, thereby adjusting the position of the positioning slider, thereby improving the practicality of the device.

[0008] Preferably, the adjusting stud is rotationally connected to the positioning slider, the threads on the outer surfaces at both ends of the adjusting stud are in opposite directions, the adjusting stud is threadedly connected to the clamping block, and the upper end of the clamping block is provided with an arc-shaped clamping claw.

[0009] By adopting the above technical solution, by rotating the adjusting stud, the threads at both ends of the adjusting stud in opposite directions respectively drive the clamping block on one side to slide, so that the two clamping blocks slide close to each other, making it easier for the clamping claws at the upper ends of the two clamping blocks to clamp and fix the user's legs, thereby improving the practicality of the device.

[0010] Preferably, the linkage anti-slip mechanism includes a linkage block, which is slidably connected to a groove on the side surface of the lower end of the clamping block, a first magnet is fixedly connected to the upper surface of one end of the linkage block, a piston column is slidably connected to the inside of the clamping block, and a second magnet is provided at the lower end of the piston column, and a stabilizing airbag is fixedly connected to the surface of the clamping block jaws.

[0011] By adopting the above technical solution, the linkage block on the surface of the clamping block is not suppressed by sliding the two clamping blocks, so that the linkage block is pushed by the spring on the surface to slide, so that the linkage block drives the first magnet at one end to slide and approach the second magnet, thereby improving the practicality of the device.

[0012] Preferably, a spring is connected between the linkage block and the clamping block, the magnetic poles of the first magnet and the second magnet facing each other are the same, a spring is connected between the piston column and the clamping block, the piston column is connected to the stabilizing airbag, and a cavity is provided inside the stabilizing airbag.

[0013] By adopting the above technical solution, the first magnet repels the second magnet, so that the second magnet drives the piston rod to slide, which makes it easier for the piston rod to fill air into the stable airbag, so that the stable airbag expands and fits the user's legs, thereby improving the practicality of the device.

[0014] Preferably, a foot adjustment mechanism is provided at one end of the support frame, which limits the patient's foot by tightening the foot limit block and the fastening belt to facilitate the second motor to drive the transmission slide column and the foot support plate to slide and adjust through the second screw rod.

[0015] By adopting the above technical solution, through the foot adjustment mechanism of the support frame, the foot limit block and the tightening belt are tightened to limit the patient's foot, so that the second motor drives the transmission slide column and the foot support plate to slide and adjust through the second screw rod, thereby improving the practicality of the device.

[0016] Preferably, the foot adjustment mechanism includes a second motor, which is fixedly connected to the side surface of the support frame, the side surface of the support frame is provided with an opening, the output end of the second motor is fixedly connected to the second screw rod, the inner wall of the opening on the side surface of the support frame is slidably connected to a transmission sliding column, one end of the transmission sliding column extends out of the side surface of the support frame, and one end of the transmission sliding column is fixedly connected to the foot support plate, two third motors are fixed on the upper surface of the foot support plate, the inner rotation of the foot support plate is connected to two first gears, the inner rotation of the foot support plate is connected to the second gear, one end of the second gear shaft is threadedly connected to the third screw rod, the surface of the foot support plate is slidably connected to the foot limit block, the surface of the foot support plate is provided with an opening, and a fastening belt is connected between the inner wall of the foot support plate opening and the output end of the third motor.

[0017] By adopting the above technical solution, the second motor drives the second screw rod to rotate, so that the second screw rod drives the transmission slide column to slide, so that the transmission slide column drives the foot support plate to change its position so as to be close to the user for limiting, thereby improving the practicality of the device.

[0018] Preferably, the second screw rod is threadedly connected to the transmission slide column, the foot support plate is slidingly connected to the support frame, the output end of the third motor is fixedly connected to the rotating shaft of the first gear, the first gear is meshingly connected to the second gear, and one end of the third screw rod is fixedly connected to the surface of the foot limit block.

[0019] By adopting the above technical solution, the first gear drives the second gear to rotate through the rotation of the first gear, and the second gear drives the third screw rod and the foot limit block to slide through the thread, so that the foot limit block fixes the user's foot, thereby improving the practicality of the device.

[0020] Compared with the prior art, the invention has the following beneficial effects: the automatic traction device for lower limb fractures:

[0021] 1. A foot limit block and a fastening belt are provided. When the device is working, the user passes the foot through the fastening belt and places the foot between the foot limit blocks. Then, the third motor drives the first gear to rotate, so that the output end of the third motor drives one end of the fastening belt to rotate and reel up, so that the fastening belt is tightened to limit the user's foot. At the same time, the rotation of the first gear drives the rotation of the second gear, and the second gear drives the third screw rod and the foot limit block to slide through the thread, so that the foot of the user is fixed after the foot limit block is combined, thereby improving the fixation of the user's foot by the device when working, increasing the stability during work, and effectively ensuring the traction effect;

[0022] 2. A second screw rod and a transmission slide column are provided, so that when the device is working, the second motor drives the second screw rod to rotate, so that the second screw rod drives the transmission slide column to slide through the thread, and the transmission slide column drives the foot support plate to move horizontally, which is convenient for adjustment according to the height of the user, is conducive to the use of users of different heights, and is convenient for auxiliary adjustment in subsequent traction work, thereby improving the practicality of the device;

[0023] 3. A first screw rod and an adjusting stud are provided, so that when the device is working, the user places the legs between the clamping blocks, and then drives the two clamping blocks to slide by rotating the adjusting stud, so that the two clamping blocks clamp the user's legs through the clamping claws at the upper ends, thereby improving the stability of the user's legs when the device is working, and the first motor drives the first screw rod to rotate, so that the first screw rod drives the positioning slider to slide through the thread, so that the positioning slider drives the clamping block to change position, which is not only convenient for users of different heights to fix, but also convenient for auxiliary adjustment during traction work;

[0024] 4. A piston column and a stabilizing airbag are provided, so that when the device is working, the clamping block is driven to slide and fix the user's legs by adjusting the stud, so that the linkage block is pushed out of the clamping block by the spring on the surface, and at the same time, the linkage block drives the first magnet to approach the second magnet, and the first magnet repels the second magnet, so that the second magnet drives the piston column to slide up, and at the same time, the piston column pushes air into the cavity of the stabilizing airbag, so that the stabilizing airbag fits the user's legs after expansion, thereby improving the anti-slip performance and increasing the comfort of the user's legs, which is conducive to improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of a three-dimensional structure of a support frame and a support plate connected in accordance with the present invention;

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the connection between the support plate and the electric push rod of the present invention;

[0027] Figure 3This is a schematic diagram of the three-dimensional structure of the connection between the first screw rod and the positioning slider of the present invention;

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the linkage slide plate and the positioning slide block of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the connection between the first motor and the first screw rod of the present invention;

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of the connection between the positioning slider and the adjusting stud of the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the linkage block and the first magnet connected to each other in the present invention;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the stable airbag of the present invention;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of the connection between the foot support plate and the third motor of the present invention;

[0034] Fig.10 It is a schematic diagram of the three-dimensional structure of the connection between the third screw rod and the foot limit block of the present invention.

[0035] In the figure: 1. support frame; 2. support plate; 3. electric push rod; 4. linkage slide plate; 5. first motor; 6. first screw rod; 7. positioning slide block; 8. adjustment stud; 9. clamping block; 10. linkage block; 11. first magnet; 12. piston column; 13. second magnet; 14. stabilizing airbag; 15. second motor; 16. second screw rod; 17. transmission slide column; 18. foot support plate; 19. third motor; 20. first gear; 21. second gear; 22. third screw rod; 23. foot limit block; 24. tightening belt. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-10The present invention provides a technical solution: an automatic traction device for lower limb fractures, comprising a support frame 1, a support plate 2, an electric push rod 3, a linkage slide plate 4, a first motor 5, a first screw rod 6, a positioning slide block 7, an adjustment stud 8, a clamping block 9, a linkage block 10, a first magnet 11, a piston column 12, a second magnet 13, a stabilizing airbag 14, a second motor 15, a second screw rod 16, a transmission slide column 17, a foot support plate 18, a third motor 19, a first gear 20, a second gear 21, a third screw rod 22, a foot limit block 23 and a fastening belt 24, the support frame 1, its surface is provided with An opening is provided, and the linkage slide plate 4 is slidably connected with the support plate 2. The output end of the first motor 5 is fixedly connected with the rotating shaft of the first screw rod 6. The first screw rod 6 is threadedly connected with the positioning slider 7. When using the device, the patient is first allowed to lie on the surface of the support frame 1, and then adjusted according to the patient's height. First, the first motor 5 drives the first screw rod 6 to rotate, so that the first screw rod 6 drives the positioning slider 7 to slide through the thread, which is convenient for the clamping block 9 on the surface of the positioning slider 7 to adjust the required fixed position, and then the second motor 15 drives the second screw rod 16 to rotate.

[0038] A support plate 2 is fixedly connected to the open surface of the support frame 1, and two electric push rods 3 are fixedly connected to the upper surface of the support plate 2. The adjusting stud 8 is rotatably connected to the positioning slider 7. The threads on the outer surfaces at both ends of the adjusting stud 8 are in opposite directions. The adjusting stud 8 is threadedly connected to the clamping block 9. An arc-shaped clamping claw is provided on the upper end of the clamping block 9. After the second screw rod 16 rotates, the second screw rod 16 drives the transmission slide column 17 to slide through the thread, and the transmission slide column 17 drives the foot support plate 18 to slide, so that the foot support plate 18 is close to the user's legs for limiting.

[0039] The output end of the electric push rod 3 passes through the surface of the support plate 2, and the output end of the electric push rod 3 is fixedly connected with a linkage slide plate 4, a spring is connected between the linkage block 10 and the clamping block 9, the first magnet 11 and the second magnet 13 have the same magnetic poles at one end facing each other, a spring is connected between the piston column 12 and the clamping block 9, and the piston column 12 is connected to the stabilizing airbag 14, and a cavity is arranged inside the stabilizing airbag 14. When fixing the user, first rotate the adjusting stud 8 to drive the two clamping blocks 9 on its surface to slide. Since the threads at both ends of the adjusting stud 8 are in opposite directions, it is convenient for the two clamping blocks 9 to slide close to each other, so that the claws at the upper end of the clamping block 9 clamp and limit the user's legs, and at the same time, after the clamping block 9 slides, the linkage block 10 on its surface is not suppressed.

[0040] Two slide grooves are arranged on the surface of the linkage slide plate 4, and the first motor 5 is fixedly installed on the inner wall of the slide groove of the linkage slide plate 4. A foot adjustment mechanism is arranged at one end of the support frame 1, which limits the patient's foot by tightening the foot limit block 23 and the fastening belt 24, so that the second motor 15 drives the transmission slide column 17 and the foot support plate 18 to slide and adjust through the second screw rod 16. After the linkage block 10 is released, the linkage block 10 is pushed by the spring on the surface to slide out of the clamping block 9, so that the linkage block 10 drives the first magnet 11 to slide close to the second magnet 13, so that the first magnet 11 repels the second magnet 13, and finally drives the piston column 12 to slide through the second magnet 13, so that the piston column 12 pushes the air into the stabilizing airbag 14, so that the stabilizing airbag 14 is inflated and fits the user's leg, thereby improving the anti-slip effect on the user's leg, which is conducive to increasing the user's comfort and improving the practicality of the device.

[0041] The inner wall of the slide groove of the linkage slide plate 4 is rotatably connected with the first screw rod 6, and the foot adjustment mechanism includes a second motor 15, which is fixedly connected to the side surface of the support frame 1, and the side surface of the support frame 1 is provided with an opening, and the output end of the second motor 15 is fixedly connected with the second screw rod 16, and the inner wall of the opening on the side surface of the support frame 1 is slidably connected with a transmission slide column 17, one end of the transmission slide column 17 extends out of the side surface of the support frame 1, and one end of the transmission slide column 17 is fixedly connected with a foot support plate 18, and two third motors 19 are fixed on the upper surface of the foot support plate 18, and the inner rotation of the foot support plate 18 is connected with two first gears 20, and the inner rotation of the foot support plate 18 is connected with a second gear 21, and the second gear 21 rotates A third screw rod 22 is threadedly connected to one end of the shaft, and a foot limit block 23 is slidably connected to the surface of the foot support plate 18. An opening is provided on the surface of the foot support plate 18, and a fastening belt 24 is connected between the inner wall of the opening of the foot support plate 18 and the output end of the third motor 19. After the user's legs are fixed, the user's feet are passed through the fastening belt 24, and then the first gear 20 is driven to rotate by the third motor 19, so that the output end of the third motor 19 drives one end of the fastening belt 24 to rotate and reel, so that the fastening belt 24 is tightened to tighten and limit the user's foot, and at the same time, the first gear 20 rotates to drive the second gear 21 to rotate, so that the rotating shaft of the second gear 21 drives the third screw rod 22 to slide through the thread.

[0042] The inner wall of the slide groove of the linkage slide plate 4 is slidably connected with a positioning slide block 7, and an adjusting stud 8 is installed on the side surface of the positioning slide block 7. The upper surface of the positioning slide block 7 is provided with a groove, and the inner wall of the groove of the positioning slide block 7 is slidably connected with two clamping blocks 9. A linkage anti-skid mechanism is provided inside the positioning slide block 7, which drives the first magnet 11 through the linkage block 10 to repel the second magnet 13 and the piston column 12 to slide and push the air into the stable airbag 14 for expansion and anti-skid. The second screw rod 16 is threadedly connected with the transmission slide column 17, the foot support plate 18 is slidably connected with the support frame 1, the output end of the third motor 19 is fixedly connected with the rotating shaft of the first gear 20, and the first gear 20 is meshed with the second gear 21. One end of the third screw rod 22 is fixedly connected with the surface of the foot limit block 23. After the third screw rod 22 slides, it drives the foot limit block 23 at one end to slide, so that the foot limit block 23 is combined to clamp and fix the user's foot, thereby further improving the fixing effect on the user's foot, which is convenient for increasing the stability during work.

[0043] Working principle: When using the automatic traction device for lower limb fractures, first make the patient lie on the surface of the support frame 1, then drive the first screw rod 6 to rotate through the first motor 5, so that the first screw rod 6 drives the positioning slider 7 to slide and adjust the position of the clamping block 9, then drive the second screw rod 16 to rotate through the second motor 15, so that the second screw rod 16 drives the transmission slide column 17 to slide through the thread, so as to adjust the position of the foot support plate 18, then rotate the adjusting stud 8 to drive the two clamping blocks 9 to slide, so that the clamping claws of the clamping blocks 9 limit the user's legs, and at the same time the linkage block 10 is pushed by the spring to drive The first magnet 11 slides close to the second magnet 13, so that the second magnet 13 is repelled and drives the piston column 12 to slide, and the air is pushed into the stabilizing airbag 14 through the piston column 12, so that the stabilizing airbag 14 is inflated and anti-slip, and the first gear 20 is driven to rotate by the third motor 19, so that the third motor 19 tightens the fastening belt 24 to fasten the user's foot, and then the first gear 20 drives the second gear 21 to rotate, so that the second gear 21 drives the third screw rod 22 and the foot limit block 23 to slide through the thread, so as to increase the stability of the user's foot and increase the overall practicality.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic traction device for lower limb fractures, comprising a support frame (1), a surface of which is provided with an opening, a support plate (2) being fixedly connected to the surface of the opening of the support frame (1), characterized in that: Two electric push rods (3) are fixedly connected to the upper surface of the support plate (2), the output end of the electric push rod (3) passes through the surface of the support plate (2), and the output end of the electric push rod (3) is fixedly connected to a linkage slide plate (4), the surface of the linkage slide plate (4) is provided with two slide grooves, and the inner wall of the slide groove of the linkage slide plate (4) is fixedly installed with a first motor (5), the inner wall of the slide groove of the linkage slide plate (4) is rotatably connected with a first screw rod (6), the inner wall of the slide groove of the linkage slide plate (4) is slidably connected with a positioning slider (7), the side surface of the positioning slider (7) is penetrated with an adjustment stud (8), the upper surface of the positioning slider (7) is provided with a groove, and the inner wall of the groove of the positioning slider (7) is slidably connected with two clamping blocks (9), and the interior of the positioning slider (7) is provided with a linkage anti-skid mechanism, which drives the first magnet (11) through the linkage block (10) to repel the second magnet (13) and the piston column (12) to slide and push air into the stabilizing airbag (14) for expansion and anti-skid.

2. The automatic traction device for lower limb fractures according to claim 1, characterized in that: The linkage slide plate (4) is slidably connected to the support plate (2), the output end of the first motor (5) is fixedly connected to the rotating shaft of the first screw rod (6), and the first screw rod (6) is threadedly connected to the positioning slide block (7).

3. The automatic traction device for lower limb fractures according to claim 1, characterized in that: The adjusting stud (8) is rotatably connected to the positioning slider (7), the threads on the outer surfaces at both ends of the adjusting stud (8) are in opposite directions, the adjusting stud (8) is threadedly connected to the clamping block (9), and the upper end of the clamping block (9) is provided with an arc-shaped clamping claw.

4. The automatic traction device for lower limb fractures according to claim 1, characterized in that: The linkage anti-slip mechanism comprises a linkage block (10), the linkage block (10) being slidably connected to a groove on the side surface of the lower end of a clamping block (9), a first magnet (11) being fixedly connected to the upper surface of one end of the linkage block (10), a piston column (12) being slidably connected inside the clamping block (9), and a second magnet (13) being arranged at the lower end of the piston column (12), and a stabilizing airbag (14) being fixedly connected to the surface of the clamping jaws of the clamping block (9).

5. The automatic traction device for lower limb fractures according to claim 4, characterized in that: A spring is connected between the linkage block (10) and the clamping block (9); the magnetic poles of the first magnet (11) and the second magnet (13) facing each other are the same; a spring is connected between the piston column (12) and the clamping block (9); the piston column (12) is connected to the stabilizing airbag (14); and a cavity is provided inside the stabilizing airbag (14).

6. The automatic traction device for lower limb fractures according to claim 1, characterized in that: A foot adjustment mechanism is provided at one end of the support frame (1), which limits the patient's foot by tightening the foot limit block (23) and the tightening belt (24) so ​​that the second motor (15) drives the transmission slide column (17) and the foot support plate (18) to slide and adjust through the second screw rod (16).

7. The automatic traction device for lower limb fractures according to claim 6, characterized in that: The foot adjustment mechanism comprises a second motor (15), the second motor (15) is fixedly connected to the side surface of the support frame (1), the side surface of the support frame (1) is provided with an opening, the output end of the second motor (15) is fixedly connected to a second screw rod (16), the inner wall of the opening on the side surface of the support frame (1) is slidably connected to a transmission slide column (17), one end of the transmission slide column (17) protrudes from the side surface of the support frame (1), and one end of the transmission slide column (17) is fixedly connected to a foot support plate (18), and the upper surface of the foot support plate (18) is fixedly Two third motors (19) are provided, the interior of the foot support plate (18) is rotatably connected to two first gears (20), the interior of the foot support plate (18) is rotatably connected to a second gear (21), one end of the rotating shaft of the second gear (21) is threadedly connected to a third screw rod (22), the surface of the foot support plate (18) is slidably connected to a foot limit block (23), the surface of the foot support plate (18) is provided with an opening, and a fastening belt (24) is connected between the inner wall of the opening of the foot support plate (18) and the output end of the third motor (19).

8. The automatic traction device for lower limb fractures according to claim 7, characterized in that: The second screw rod (16) is threadedly connected to the transmission slide column (17), the foot support plate (18) is slidably connected to the support frame (1), the output end of the third motor (19) is fixedly connected to the rotating shaft of the first gear (20), the first gear (20) is meshedly connected to the second gear (21), and one end of the third screw rod (22) is fixedly connected to the surface of the foot limit block (23).

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