Fracture traction device for automatically adjusting the weight of traction

Abstract

The present application relates to the technical field of medical devices, in particular to a bone fracture traction device capable of automatically adjusting traction weight, comprising traction assemblies, a turnover assembly and a clamping and fixing assembly, the number of the traction assemblies is two, the turnover assembly is installed between the two traction assemblies and can move along the length direction of the traction assemblies, the clamping and fixing assembly is installed in the middle of the turnover assembly, the turnover assembly is used to drive the clamping and fixing assembly to adjust the angle, and the clamping and fixing assembly is used to clamp and fix the limbs of a patient or an extended steel needle, the servo drive motor, the threaded rod and the sliding block mechanism are arranged in the traction assembly, and a tension and pressure sensor is installed at the traction end, so that the automatic, real-time and accurate adjustment of the traction weight is realized, the clinical risks of insufficient traction or excessive traction in the traditional weight traction mode are avoided, and the safety of the traction treatment is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a fracture traction device that automatically adjusts the traction weight. Background Technology

[0002] Fracture traction is an important technique in orthopedic treatment used to correct overlapping displacement, angular deformity, and rotational displacement of fracture fragments. It is widely used in long bone fractures of the limbs, periarticular fractures, and temporary reduction and fixation before and during surgery. Traditional fracture traction methods are mainly divided into two categories: one is continuous skeletal or skin traction relying on suspended weights, and the other is intraoperative reduction using a mechanical traction bed.

[0003] In existing technologies, the most commonly used traction method in clinical practice is the "weight-pulley-traction bow" system. The core principle of this system is to utilize suspended weights to generate a constant traction force, which is then changed in direction via a pulley system and applied to the bone or skin via the traction bow. For example, tibial tuberosity traction or supracondylar traction is commonly used for femoral fractures. This involves inserting a steel pin into the distal end of the affected limb, connecting a steel cable and weights via the traction bow, and using the weights' gravity to apply continuous traction to the distal fracture site. However, this type of traditional traction device has the following significant shortcomings in practical applications: 1. Traction force cannot be dynamically adjusted: Once the weights are suspended, the traction force they generate is a fixed value and cannot be adjusted in real time according to changes in the patient's position, relief of muscle spasms, or changes in the degree of pain. When the patient turns over, raises their hips, or relaxes due to muscle fatigue, the actual traction force acting on the fracture ends will drift significantly, resulting in insufficient or excessive traction.

[0004] 2. Poor adaptability of steel needle clamping device: In clinical practice, there are often individual differences in the percutaneous bone traction steel needles. The direction, angle and spatial position of their protrusion from the skin are not completely consistent. The existing connection between the traction bow and the steel needle mostly adopts rigid clamps or fixed angle interfaces, which cannot meet the requirement of accurate clamping when the steel needle protrudes from all directions.

[0005] 3. Lack of traction force perception and feedback: Traditional weight traction lacks a force feedback mechanism, and medical staff cannot obtain the real-time traction force value. They can only judge the traction effect based on experience. This rough operation mode is difficult to meet the needs of precise orthopedic surgery. Especially in elderly patients with osteoporotic fractures or children with fractures, improper control of traction force can easily lead to complications.

[0006] To address the aforementioned problems, this invention proposes a fracture traction device that automatically adjusts the traction weight, adapts to steel pin clamping at any angle, and has multi-degree-of-freedom body position adjustment capabilities. Summary of the Invention

[0007] To address the problems existing in the background art, the present invention proposes a fracture traction device that automatically adjusts the traction weight.

[0008] The fracture traction device that automatically adjusts the traction weight provided in this application adopts the following technical solution: A fracture traction device with automatic adjustment of traction weight includes: a traction component, a flipping component, and a clamping and fixing component. The traction component is in two sets, and a flipping component is installed between the two sets of traction components. The flipping component can move along the length direction of the traction component. A clamping and fixing component is installed in the middle of the flipping component. The flipping component is used to drive the clamping and fixing component to adjust to any angle. The clamping and fixing component is used to clamp and fix the patient's limbs or the extended steel pins. The clamping and fixing assembly includes a rotating frame, a limiting slider, a support plate, a telescopic mechanism, and a steel needle connecting mechanism. The rotating frame is installed at the lower end of the flipping assembly. The rotating frame has an arc-shaped structure. The limiting slider that slides with the flipping assembly is installed at the upper end of the rotating frame. The support plate is installed at the lower end of the rotating frame. A limb receiving cavity is formed between the upper end of the support plate and the rotating frame. Steel needle connecting mechanisms are symmetrically arranged on the front and rear sides of the rotating frame. The steel needle connecting mechanisms are connected to the rotating frame through the telescopic mechanism. The telescopic mechanism can adjust the distance between the two sets of steel needle connecting mechanisms.

[0009] Furthermore, a flexible pad is provided on the upper surface of the support plate, and straps are also provided on the left and right sides of the support plate.

[0010] Furthermore, the telescopic mechanism includes a telescopic rod and a support plate. Through holes are evenly provided on the front and rear sides of the rotating frame. A telescopic rod is installed in the through hole. The telescopic rod is an electric push rod. A support plate is installed between the outer ends of the telescopic rod on the same side. The support plate has an L-shaped arc structure. A sliding groove is provided on the support plate. The steel needle connecting mechanism is slidably arranged in the sliding groove.

[0011] Furthermore, the steel needle connecting mechanism includes a connecting frame, an electromagnetic ball seat, a universal head, and a locking frame. The connecting frame has an arc-shaped structure and is slidably disposed in a groove on the support plate. The connecting frame is also equipped with locking screws that cooperate with the support plate. Electromagnetic ball seats are symmetrically installed at the lower end of the connecting frame. A universal head is installed inside the electromagnetic ball seat. The electromagnetic ball seat can lock the universal head at any angle. A locking frame is installed at the lower end of the universal head. A through groove for the steel needle to pass through is opened in the middle of the locking frame.

[0012] Furthermore, a clamping frame is symmetrically installed inside the through groove, a V-shaped groove is opened in the middle of the clamping frame, and a bolt for driving the clamping frame to move upward is installed at the lower end of the clamping frame.

[0013] Furthermore, the traction assembly includes a rectangular frame, threaded rods, and a slider. Two sets of threaded rods are mounted on the middle of the rectangular frame via bearings. A drive motor is connected to the end of each threaded rod, and a slider is mounted on the threaded rod. The drive motor can drive the slider to move horizontally via the threaded rod.

[0014] Furthermore, the flipping assembly includes a flipping frame, a front-to-back flipping mechanism, and a left-to-right flipping mechanism. The flipping frame has a rectangular structure, and a rotating groove that cooperates with the rotating frame is opened in the middle of the flipping frame. The front-to-back flipping mechanism is installed on the outside of the slider, and the end of the front-to-back flipping mechanism passes through the slider and is connected to the flipping frame. The left-to-right flipping mechanism is installed inside the flipping frame.

[0015] Furthermore, the forward and backward tilting mechanism includes a geared motor and a drive shaft. The geared motor is mounted on the outside of the slider, and the drive shaft is mounted on the geared motor through a coupling. The drive shaft passes through the slider and is connected to the tilting frame.

[0016] Furthermore, the left and right flipping mechanism includes a drive gear and flipping teeth. The drive gear is symmetrically installed inside the flipping frame through bearings. The drive gear is connected to the output shaft of the motor. Flipping teeth are evenly installed on the upper end of the limiting slider and mesh with the drive gear.

[0017] Beneficial effects Compared with the prior art, the present invention provides a fracture traction device that automatically adjusts the traction weight, which has the following beneficial effects: 1. In this invention, by setting a servo drive motor, a threaded rod and a slider mechanism in the traction component, and installing a tension and pressure sensor at the traction end, the automatic, real-time and precise adjustment of the traction weight is realized. It can automatically control the motor to rotate forward or backward according to the difference between the actual force value fed back by the sensor and the preset target value, and dynamically adjust the magnitude of the traction force. This avoids the clinical risks of insufficient or excessive traction in the traditional weight traction method and improves the safety of traction therapy.

[0018] 2. In this invention, a steel needle connection mechanism including an electromagnetic ball seat and a universal head is designed in the clamping and fixing component. When the electromagnetic ball seat is de-energized, the universal head has multiple degrees of rotational freedom and can rotate freely to follow the actual extension angle and direction of the steel needle protruding from the skin at the distal end of the patient's fracture. During operation, simply put the locking frame on the tail of the steel needle, and the universal head will automatically adjust to a position coinciding with the axis of the steel needle. Then, energize the electromagnetic ball seat, and the electromagnetic force will lock the universal head at that angle. This eliminates the bending stress generated by the traditional rigid clamp forcibly twisting the steel needle to match the angle, avoids skin necrosis due to pressure at the nail tract opening, prevents the steel needle from loosening or being pulled out of the bone, reduces the incidence of nail tract infection and iatrogenic fracture, and at the same time reduces intraoperative operation time and improves surgical efficiency.

[0019] 3. In this invention, by setting up a front-to-back flipping mechanism and a left-to-right flipping mechanism, the pitch angle of the clamping and fixing component in the sagittal plane and the left-to-right swing angle in the coronal plane can be adjusted. According to the reduction requirements of different types of fractures, the affected limb can be accurately placed in any required functional position. Thus, it can meet the reduction requirements of various complex fractures such as long bone fractures of the limbs and periarticular fractures, with a wider range of applications and more convenient operation. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a three-dimensional structural diagram of this application.

[0022] Figure 2 This is a cross-sectional structural diagram of this application.

[0023] Figure 3 This is a cross-sectional view of this application.

[0024] Figure 4 This is a cross-sectional structural diagram of the flipping frame and the flipping frame in this application.

[0025] Figure 5 This is a three-dimensional structural diagram of the flipping teeth and flipping frame of this application.

[0026] Figure 6 This is a three-dimensional structural diagram of the connection mechanism between the support plate and the steel needle in this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Traction assembly; 11. Rectangular frame; 12. Threaded rod; 13. Slider; 2. Tilting assembly; 21. Tilting frame; 22. Front and rear tilting mechanism; 221. Gear motor; 222. Drive shaft; 23. Left and right tilting mechanism; 231. Drive gear; 232. Tilting tooth; 3. Tilting frame; 31. Rotating frame; 32. Limiting slider; 33. Support plate; 34. Telescopic mechanism; 341. Telescopic rod; 342. Support plate; 35. Steel needle connecting mechanism; 351. Connecting frame; 352. Electromagnetic ball seat; 353. Universal head; 354. Locking frame. Detailed Implementation

[0028] 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.

[0029] like Figures 1-6As shown, this embodiment provides a fracture traction device with automatic adjustment of traction weight, including a traction component 1, a flipping component 2, and a clamping and fixing component 3. The number of traction components 1 is two sets, and the two sets of traction components 1 are arranged in parallel. A flipping component 2 is installed between the two sets of traction components 1. The flipping component 2 can reciprocate along the length direction (i.e., traction direction) of the traction component 1 under the drive of the traction component 1. A clamping and fixing component 3 is installed in the middle of the flipping component 2. The flipping component 2 is used to drive the clamping and fixing component 3 to make spatial adjustments at any angle. The clamping and fixing component 3 is used to directly contact and fix the patient's limbs (skin traction mode) or clamp the bone traction pins that protrude from the skin (bone traction mode).

[0030] Specifically, such as Figures 4-6 As shown, the clamping and fixing assembly 3 includes a rotating frame 31, a limiting slider 32, a support plate 33, a telescopic mechanism 34, and a steel needle connecting mechanism 35. The rotating frame 31 is mounted on the lower end of the flipping assembly 2. The rotating frame 31 has an overall arc-shaped structure with its arc opening facing downwards. The limiting slider 32 is fixedly mounted on the upper end (i.e., the arch position) of the rotating frame 31. The limiting slider 32 slides in cooperation with the lower part of the flipping assembly 2, allowing the rotating frame 31 to rotate and adjust under the drive of the flipping assembly 2. The lower end of the rotating frame 31 (i.e., the two free ends of the arc)... A support plate 33 is installed in the middle of the frame. The support plate 33 is horizontally positioned or has an arc that adapts to the physiological curvature of the limbs. The upper end surface of the support plate 33 and the inner wall of the rotating frame 31 together form a cavity for accommodating the patient's limbs (such as forearms and lower legs). To improve patient comfort, a flexible pad (such as medical sponge or silicone pad) is provided on the upper end surface of the support plate 33, and straps are also provided on the left and right sides of the support plate 33 (i.e., on both sides along the length of the limbs) to securely fix the limbs to the support plate 33 and prevent displacement during treatment.

[0031] Furthermore, steel needle connecting mechanisms 35 are symmetrically arranged on the front and rear sides of the rotating frame 31. Each steel needle connecting mechanism 35 is connected to the side wall of the rotating frame 31 through a telescopic mechanism 34. The telescopic mechanism 34 can adjust the relative distance between the two sets of steel needle connecting mechanisms 35 to adapt to the needs of different patient physiques or different steel needle insertion positions.

[0032] In this embodiment, as Figure 4As shown, the telescopic mechanism 34 specifically includes a telescopic rod 341 and a support plate 342. Multiple through holes are evenly provided along the arc direction on the front and rear side walls of the rotating frame 31. Each through hole houses a telescopic rod 341, preferably an electric push rod, to facilitate precise control of the telescopic amount. A support plate 342 is installed on the outer ends (i.e., the end furthest from the rotating frame 31) of all the telescopic rods 341 on the same side. The support plate 342 has an L-shaped arc structure in its cross-section, meaning it has a horizontal support surface and a vertical connecting surface. The overall arc is adapted to the arc of the rotating frame 31. A groove extending along the length direction is provided on the upper surface of the support plate 342. The steel needle connecting mechanism 35 is slidably disposed within this groove, thereby enabling further adjustment of its position along the arc trajectory of the support plate 342.

[0033] like Figure 6 As shown, the steel needle connection mechanism 35 includes a connecting frame 351, an electromagnetic ball seat 352, a universal head 353, and a locking frame 354. The connecting frame 351 has an overall arc-shaped structure, and its bottom is slidably fitted in a groove on the support plate 342. The connecting frame 351 is also equipped with a locking screw that cooperates with the support plate 342, which is used to lock and fix the connecting frame 351 after position adjustment. Two electromagnetic ball seats 352 are symmetrically installed at the lower end of the connecting frame 351. Each electromagnetic ball seat 352 has a universal head 353 installed inside. The electromagnetic ball seats 352 are released when the power is off, allowing the universal head 353 to rotate freely. When the power is on, they are locked, which can lock the universal head 353 at any angle position. The lower end of the universal head 353 is fixedly installed with a locking frame 354. The middle of the locking frame 354 has a through groove for the bone drilling steel needle to pass through. The direction of the through groove is consistent with the extension direction of the steel needle.

[0034] Furthermore, such as Figure 6 As shown, two clamping frames 355 are symmetrically installed inside the through groove. Each clamping frame 355 has a V-shaped groove in the middle. The inner wall of the V-shaped groove is provided with anti-slip ridges. The two V-shaped grooves are arranged opposite each other to form a clamping space to accommodate steel needles of different diameters. An adjusting bolt is installed at the lower end of the clamping frame 355. By turning the bolt, the clamping frame 355 can be driven to move upward, thereby firmly pressing the steel needles inserted into the through groove into the V-shaped groove.

[0035] like Figure 1As shown, the traction assembly 1 includes a rectangular frame 11, threaded rods 12, and sliders 13. The rectangular frame 11 is a long strip structure with a hollow inner cavity. Two sets of parallel threaded rods 12, preferably ball screws, are rotatably mounted inside the frame via bearings. Each threaded rod 12 is connected to a drive motor at its end. A slider 13 is installed on the threaded rod 12 via a threaded engagement. When the drive motor drives the threaded rod 12 to rotate, it can drive the slider 13 to make a precise horizontal linear movement along the axial direction of the threaded rod 12. The sliders 13 of the two sets of traction assemblies 1 are respectively connected to both ends of the flipping assembly 2, thereby driving the entire flipping assembly 2 and the clamping and fixing assembly 3 to move in a traction manner.

[0036] Furthermore, a sensor (such as a tension sensor or displacement sensor) is connected to the end of the traction component 1. This sensor is electrically connected to the signal input terminal of the controller to collect the actual tension on the traction rope in real time and feed the signal back to the servo drive motor to form a closed-loop PID control system. This system automatically adjusts the output torque of the motor to achieve the preset traction weight and eliminates force fluctuations caused by patient position changes or muscle spasms. Specifically, when the drive motor starts, the threaded rod 12 rotates, driving the slider 13 to move horizontally along the rectangular frame 11. The sensor detects the traction force in real time: if the detected value is lower than the target value, the controller controls the motor to rotate forward to tighten; if the detected value is higher than the target value, the controller controls the motor to rotate in reverse to relax, thus realizing the core function of "automatically adjusting the traction weight".

[0037] like Figure 2 As shown, the flipping assembly 2 includes a flipping frame 21, a front-to-back flipping mechanism 22, and a left-to-right flipping mechanism 23. The flipping frame 21 has a rectangular frame structure, with a rotating groove in the middle that matches the shape of the rotating frame 31. The limiting slider 32 of the rotating frame 31 is housed in the rotating groove. The front-to-back flipping mechanism 22 is installed on the outer side of the slider 13 (i.e., the side away from the other set of traction components). The end of the front-to-back flipping mechanism 22 passes through the slider 13 and is connected to the side wall of the flipping frame 21, which is used to drive the flipping frame 21 to flip back and forth around the horizontal axis. At the same time, the left-to-right flipping mechanism 23 is also installed inside the flipping frame 21, which is used to drive the clamping and fixing assembly 3 to swing left and right around the vertical axis.

[0038] Specifically, the front and rear flipping mechanism 22 includes a reduction motor 221 and a drive shaft 222. The reduction motor 221 is fixedly installed on the outer side of the slider 13. The output shaft of the reduction motor 221 is connected to the drive shaft 222 through a coupling. After passing through the shaft hole opened on the slider 13, the drive shaft 222 is fixedly connected to the side wall of the flipping frame 21. When the reduction motor 221 works, the drive shaft 222 drives the flipping frame 21 to rotate around the axis of the drive shaft 222, thereby realizing the front and rear flipping adjustment.

[0039] The left-right flipping mechanism 23 includes a drive gear 231 and flipping teeth 232. Two drive gears 231 are symmetrically mounted in the internal cavity of the flipping frame 21 via bearings. Each drive gear 231 is connected to the output shaft of a motor. Simultaneously, multiple flipping teeth 232 are evenly arranged along the arc direction on the upper surface of the limiting slider 32. These flipping teeth 232 form an arc-shaped rack. The drive gear 231 meshes with the flipping teeth 232. When the drive gear 231 rotates, the gear and rack meshing drives the limiting slider 32 to slide left and right within the rotation groove of the flipping frame 21. Since the limiting slider 32 is fixedly connected to the rotating frame 31, the rotating frame 31 will swing left and right around the vertical axis accordingly.

[0040] The specific steps for using this invention are as follows: S1. Equipment installation and patient fixation Two sets of traction components 1 are fixedly installed on the guide rails on both sides of the operating table or hospital bed. The position of the rectangular frame 11 is adjusted so that it is parallel to the long axis of the patient's affected limb. The patient's affected limb is placed on the flexible pad on the upper end of the support plate 33 so that the fracture site is located in the limb receiving cavity formed between the rotating frame 31 and the support plate 33. The affected limb is initially fixed by the straps on the front and back sides of the support plate 33 to prevent slippage.

[0041] S2, Traction Mode Selection and Connection Select the traction mode based on clinical needs: If skin traction mode is used, the distal end of the affected limb is directly connected to the rotating frame 31 or the telescopic mechanism 34 using a strap. If the bone traction mode is used, the operation is as follows: First, put the electromagnetic ball seat 352 in the de-energized state, at which time the universal head 353 can rotate freely; pass the tail of the steel needle protruding from the skin at the distal end of the patient's fracture through the through groove in the middle of the locking frame 354, and manually adjust the angle of the universal head 353 to keep it consistent with the protrusion direction of the steel needle; after adjustment, energize the electromagnetic ball seat 352, and the electromagnetic force locks the universal head 353 at the current angle; then tighten the bolt at the lower end of the clamping frame 355, the bolt pushes the clamping frame 355 to move upward, and the steel needle is clamped and fixed in the locking frame 354 by the V-shaped groove in the middle of the clamping frame 355.

[0042] S3, Extension and Initial Angle Adjustment Based on the thickness of the patient's limb, the electric push rod of the telescopic mechanism 34 is activated, driving the telescopic rod 341 to extend and retract, adjusting the distance between the two side support plates 342 so that the support plates 342 fit the sides of the patient's limb; based on the positional requirements for fracture reduction, the reduction motor 221 of the front-to-back flipping mechanism 22 is activated, the reduction motor 221 drives the flipping frame 21 to rotate around the horizontal axis through the drive shaft 222, realizing the pitch angle adjustment of the clamping and fixing component 3; at the same time, the motor of the left-to-right flipping mechanism 23 is activated, the motor drives the drive gear 231 to rotate, the drive gear 231 meshes with the flipping tooth 232 at the upper end of the limiting slider 32, driving the rotating frame 31 to slide along the rotating groove in the middle of the flipping frame 21, realizing the left-to-right swing angle adjustment of the clamping and fixing component 3; through the above adjustments, the patient's limb is placed in the target position that is conducive to fracture reduction.

[0043] S4, Automatic Traction Reset The target traction weight and allowable safety fluctuation range are input into the control system; the drive motor of the traction component 1 is started, the drive motor drives the threaded rod 12 to rotate, the threaded rod 12 drives the slider 13 to move horizontally along the rectangular frame 11, the slider 13 drives the flipping component 2 and the clamping and fixing component 3 to move along the long axis of the affected limb, applying axial traction force to the distal end of the fracture; the sensor installed at the end of the traction component 1 collects the actual traction force value in real time and feeds it back to the control system, the control system compares the measured value with the target value, and automatically adjusts the output torque of the drive motor through the PID algorithm: when the traction force is lower than the target value, the motor rotates forward to tighten; when the traction force is higher than the target value, the motor rotates in reverse to relax; this cycle is repeated so that the traction force is always maintained within the set target range, so as to achieve continuous and stable traction of the fracture ends until the overlapping displacement is corrected and the fracture ends are aligned satisfactorily.

[0044] S5. Postoperative unlocking and device removal After the repositioning operation is completed, first turn off the drive motor of traction component 1 to unload the traction force; for bone traction mode, loosen the bolts at the lower end of the clamping frame 355 in sequence to release the steel needle, de-energize the electromagnetic ball seat 352 to restore the universal head 353 to a free rotation state, and then remove the locking frame 354 from the tail of the steel needle; release the straps on the front and rear sides of the support plate 33; activate the telescopic mechanism 34 to return the support plate 342 to the initial position; gently lift the patient's affected limb away from the support plate 33, and finally remove the two sets of traction components 1 from the bed rail to complete the entire traction repositioning operation.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fracture traction device that automatically adjusts the traction weight, characterized in that, include: The traction assembly (1), the flipping assembly (2), and the clamping and fixing assembly (3) are provided. There are two sets of traction assemblies (1). A flipping assembly (2) is installed between the two sets of traction assemblies (1). The flipping assembly (2) can move along the length of the traction assembly (1). A clamping and fixing assembly (3) is installed in the middle of the flipping assembly (2). The flipping assembly (2) is used to drive the clamping and fixing assembly (3) to adjust the angle at any time. The clamping and fixing assembly (3) is used to clamp and fix the patient's limbs or the extended steel needles. The clamping and fixing assembly (3) includes a rotating frame (31), a limiting slider (32), a support plate (33), a telescopic mechanism (34), and a steel needle connecting mechanism (35). The rotating frame (31) is installed at the lower end of the flipping assembly (2). The rotating frame (31) has an arc-shaped structure. The limiting slider (32) that slides with the flipping assembly (2) is installed at the upper end of the rotating frame (31). The support plate (33) is installed at the lower end of the rotating frame (31). A limb receiving cavity is formed between the upper end of the support plate (33) and the rotating frame (31). The steel needle connecting mechanism (35) is symmetrically arranged on the front and rear sides of the rotating frame (31). The steel needle connecting mechanism (35) is connected to the rotating frame (31) through the telescopic mechanism (34). The telescopic mechanism (34) can adjust the distance between the two sets of steel needle connecting mechanisms (35).

2. The fracture traction device with automatic adjustment of traction weight according to claim 1, characterized in that: The upper surface of the support plate (33) is provided with a flexible pad, and the left and right sides of the support plate (33) are also provided with straps.

3. The fracture traction device with automatic adjustment of traction weight according to claim 1, characterized in that: The telescopic mechanism (34) includes a telescopic rod (341) and a support plate (342). The rotating frame (31) has through holes evenly opened on both the front and rear sides. The telescopic rod (341) is installed in the through holes. The telescopic rod (341) is an electric push rod. The support plate (342) is installed between the outer ends of the telescopic rod (341) on the same side. The support plate (342) has an arc structure with an L-shaped cross section. The support plate (342) has a sliding groove. The steel needle connecting mechanism (35) is slidably arranged in the sliding groove.

4. A fracture traction device with automatic adjustment of traction weight according to claim 3, characterized in that: The steel needle connecting mechanism (35) includes a connecting frame (351), an electromagnetic ball seat (352), a universal head (353), and a locking frame (354). The connecting frame (351) has an arc-shaped structure and is slidably disposed in a groove on the support plate (342). The connecting frame (351) is also equipped with a locking screw that cooperates with the support plate (342). The electromagnetic ball seat (352) is symmetrically installed at the lower end of the connecting frame (351). The universal head (353) is installed inside the electromagnetic ball seat (352). The electromagnetic ball seat (352) can lock the universal head (353) at any angle. The locking frame (354) is installed at the lower end of the universal head (353). The locking frame (354) has a through groove in the middle for the steel needle to pass through.

5. A fracture traction device with automatic adjustment of traction weight according to claim 4, characterized in that: A clamping frame (355) is symmetrically installed inside the through groove. A V-shaped groove is opened in the middle of the clamping frame (355). A bolt for driving the clamping frame (355) to move upward is installed at the lower end of the clamping frame (355).

6. A fracture traction device with automatic adjustment of traction weight according to claim 5, characterized in that: The traction assembly (1) includes a rectangular frame (11), a threaded rod (12), and a slider (13). Two sets of threaded rods (12) are mounted on the middle of the rectangular frame (11) via bearings. A drive motor is connected to the end of the threaded rod (12). A slider (13) is mounted on the threaded rod (12). The drive motor can drive the slider (13) to move horizontally through the threaded rod (12).

7. A fracture traction device with automatic adjustment of traction weight according to claim 6, characterized in that: The flipping assembly (2) includes a flipping frame (21), a front-to-back flipping mechanism (22), and a left-to-right flipping mechanism (23). The flipping frame (21) has a rectangular structure and a rotating groove that cooperates with the rotating frame (31) is provided in the middle of the flipping frame (21). The front-to-back flipping mechanism (22) is installed on the outside of the slider (13). The end of the front-to-back flipping mechanism (22) passes through the slider (13) and is connected to the flipping frame (21). The left-to-right flipping mechanism (23) is installed inside the flipping frame (21).

8. A fracture traction device with automatic adjustment of traction weight according to claim 7, characterized in that: The front and rear flipping mechanism (22) includes a geared motor (221) and a drive shaft (222). The geared motor (221) is mounted on the outside of the slider (13). The geared motor (221) is mounted on the drive shaft (222) through a coupling. The drive shaft (222) passes through the slider (13) and is connected to the flipping frame (21).

9. A fracture traction device with automatic adjustment of traction weight according to claim 8, characterized in that: The left and right flipping mechanism (23) includes a drive gear (231) and flipping teeth (232). The drive gear (231) is symmetrically installed inside the flipping frame (21) through bearings. The drive gear (231) is connected to the output shaft of the motor. The flipping teeth (232) are evenly installed on the upper end of the limiting slider (32). The flipping teeth (232) mesh with the drive gear (231).

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