Portable lower limb fracture tractor
Through the multi-dimensional adjustment design of the base frame, linkage bracket and support plate, the problem of insufficient adaptability of existing lower limb fracture traction devices has been solved, realizing flexible adaptation to patients of different body types and fracture types, and improving the functionality and stability of the traction device.
Patent Information
- Application Number
- CN202511715331.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-21
- Publication Date
- 2025-12-26
AI Technical Summary
Existing lower limb fracture traction devices cannot be precisely adapted to patients of different body types and complex application scenarios, and cannot achieve multi-dimensional adjustment, which limits their clinical application value.
A convenient lower limb fracture traction device was designed. Through the combination of a base frame, a linkage bracket, and a support plate, and by utilizing an adjustable support structure and adjustment components, the height of the base frame, the angle of the linkage bracket, and the position of the support plate can be adjusted in multiple dimensions to adapt to patients of different body types and fracture types.
It enables flexible adaptation to patients of different body types and fracture types, improves the functionality and stability of the traction device, and meets the needs of rapid clinical response and flexible adjustment.
Smart Images
Figure CN121196820A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, specifically a convenient lower limb fracture traction device. Background Technology
[0002] Lower limb fractures, one of the most common types of trauma in orthopedics, frequently occur in scenarios such as traffic accidents, falls from heights, and sports injuries. Immediate, safe, and effective traction fixation of the affected limb during critical stages such as pre-hospital emergency care, in-hospital transport, and preoperative stabilization is the primary step and gold standard in clinical treatment. Excellent traction can rapidly restore limb axial alignment and length, significantly alleviate severe pain caused by muscle spasms and fracture dislocation, and, more importantly, effectively avoid secondary sharp injuries to nearby blood vessels and nerves caused by the fracture fragments during transport, creating favorable conditions for subsequent definitive treatment and reducing the risk of complications.
[0003] Existing traction devices generally lack effective adaptation to individual patient differences and complex application scenarios. Traditional fixed traction frames (such as the Thomas frame) have fixed overall dimensions and key angles, making it impossible to precisely adapt to the different lower limb sizes and physiological curvatures from children to adults, and from slender to robust individuals. In portable fracture traction devices, the adjustment functions are even more limited, usually only allowing for simple longitudinal stretching, and failing to achieve multi-dimensional adjustment of traction height and joint flexion-extension angles. This leaves medical staff helpless when facing different fracture types and different body position requirements (such as the need to maintain knee flexion to relax posterior blood vessels and nerves), greatly limiting their clinical application value. Summary of the Invention
[0004] This invention aims to provide a convenient lower limb fracture traction device. It utilizes a base frame, a linkage bracket, and a support plate to fix the lower limb. The adjustable support structure allows for adjustment of the base frame height according to actual needs. During the adjustment of the base frame height, the angle of the linkage bracket relative to the base frame adaptively adjusts. The adjustment component adjusts the horizontal position and tilt angle of the support plate relative to the base frame according to actual needs. This allows the traction device to be effectively used for lower limb fixation and traction for patients of different body types, different fracture types, and different body positions. This solves the problems in the prior art.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] A convenient lower limb fracture traction device includes a base frame connected to a support assembly, a linkage bracket, and a support plate. The support assembly includes a housing connected to an adjustable support structure and an adjustment handle. The adjustment handle is used to adjust the height of the adjustable support structure. The base frame is connected to the adjustment end of the adjustable support structure. The linkage bracket is rotatably connected to the base frame. The support plate is slidably and adjustablely connected to the base frame. The support plate is connected to a fixing rope and an adjustment assembly, which is used to adjust the horizontal position and horizontal tilt angle of the support plate relative to the base frame.
[0007] Furthermore, the adjustable support structure includes a lead screw rotatably connected to the housing, an adjustment handle being drivenly connected to the lead screw, and the adjustment handle being located on the outside of the housing; the lead screw is connected to a pair of linkage members via threads with opposite directions of rotation, the pair of linkage members being respectively connected to a lower linkage rod and an upper linkage rod, the lower end of the lower linkage rod being rotatably connected to the bottom wall of the housing, and the upper end of the upper linkage rod being rotatably connected to the base frame; by rotating the lead screw through the adjustment handle, the pair of linkage members move towards each other, and the upper end of the upper linkage rod moves in the vertical direction to adjust the horizontal height of the base frame.
[0008] Furthermore, the adjusting handle and the lead screw are connected by a gear set, which includes a main drive gear and a driven drive gear that mesh with each other. The main drive gear is coaxially and fixedly connected to the adjusting handle, and the driven drive gear is coaxially and fixedly connected to the lead screw. There are two adjustable support structures and two driven drive gears. The two adjustable support structures are mirror-symmetrically arranged with the vertical center plane of the housing as the reference plane, and the two drive gears are respectively externally meshed on the left and right sides of the main drive gear.
[0009] Furthermore, the base frame is also connected to a clamping assembly, which includes a spring, a wedge-shaped seat, and a pair of clamping arms. The lower end of the spring is connected to the housing, and the upper end of the spring is connected to the wedge-shaped seat. The wedge-shaped seat has a larger upper end and a smaller lower end. Both of the clamping arms are rotatably connected to the base frame, and the lower ends of both clamping arms slide against the wedge-shaped inclined surface of the wedge-shaped seat. When the wedge-shaped seat moves upward, the upper ends of the pair of clamping arms move away from each other, and when the wedge-shaped seat moves downward, the upper ends of the pair of clamping arms move closer to each other.
[0010] Furthermore, the clamping assembly and the adjustable support structure are connected by a linkage assembly, which includes a driving spur gear, a driven spur gear, a driving bevel gear, a linkage seat, a limiting member, a linkage cylinder, a driven bevel gear, and a threaded rod. The driven spur gear and the threaded rod are rotatably connected to the housing, and the limiting member is fixedly connected to the housing. The driving spur gear is coaxially and fixedly connected to the main drive gear, the driven spur gear meshes with the driving spur gear, the driving bevel gear is coaxially and fixedly connected to the driven spur gear, the driven bevel gear is fixedly connected to the threaded rod, and the driven bevel gear meshes with the driving bevel gear. The linkage cylinder is threaded to the upper side of the threaded rod, and the limiting member is sleeved on the outer side of the linkage cylinder to restrict its rotation. The linkage seat is fixedly connected to the upper side of the linkage cylinder, and the side of the spring away from the wedge-shaped seat is connected to the linkage seat.
[0011] Furthermore, a ball is rotatably connected to the lower side of the clamping arm, and a groove is opened on the wedge-shaped inclined surface of the wedge seat, with the ball rolling inside the groove.
[0012] Furthermore, a clamping ball is connected to the upper side of the clamping arm.
[0013] Furthermore, a sliding groove is provided on the side of the base frame away from the linkage bracket, and a slider is rotatably connected to the support plate, the slider being slidably disposed inside the sliding groove.
[0014] Furthermore, the adjusting assembly includes a lower support, an internally threaded cylinder, and an upper support. The upper and lower support are respectively connected to the upper and lower ends of the internally threaded cylinder by threads with opposite directions of rotation. The lower support is connected to a handle for pushing and pulling the adjusting assembly. The upper support is rotatably connected to the support plate.
[0015] Furthermore, both the base frame and the linkage bracket are provided with a placement part, the placement part is provided with flexible fabric, and the side of the linkage bracket away from the base frame is arc-shaped.
[0016] The principles and beneficial effects of the technical solution are as follows:
[0017] 1. This invention provides a convenient lower limb fracture traction device, comprising a base frame connected to a support assembly, a linkage bracket, and a support plate. The support assembly includes a housing connected to an adjustable support structure for adjusting the height of the base frame. The support plate is slidably and adjustablely connected to the base frame, and is connected to a fixing rope and an adjustment assembly for adjusting its horizontal position and tilt angle. The linkage bracket is rotatably connected to the base frame. In actual use, the end of the linkage bracket away from the base frame abuts against a reference surface (bed surface). Based on actual clinical needs (different patient sizes, fracture types, and body positions requiring different traction device heights), the height of the base frame is adjusted using the adjustable support structure, and the angle of the linkage bracket relative to the base frame changes accordingly. Simultaneously, the adjustment assembly adjusts the horizontal position (length of the entire traction device) and height (horizontal angle of the support plate) of the support plate relative to the base frame to ensure the traction effect on the affected lower limb. The height and angle of the entire traction device are adjustable, and the adjustment / use operation is convenient, making it widely applicable and highly valuable in clinical practice.
[0018] 2. This invention provides a convenient lower limb fracture traction device. The adjustable support structure adopts a screw, linkage, upper linkage rod, and lower linkage rod structure. When the screw is turned by adjusting the handle, a pair of linkages move towards each other under the action of the thread, driving the upper and lower linkage rod structures to rotate. During the rotation of the linkage rods (upper and lower linkage rod structures), the base frame moves up and down, thus the adjustable support structure forms a "scissor jack" to achieve support and height adjustment of the base frame. The adjustable support structure has two parts, and the two adjustable support structures are mirror-symmetrically arranged with the vertical center plane of the box as the reference plane. The two adjustable support structures are connected by a gear set (main drive gear and driven gear). Turning the adjustment handle makes the two adjustable support structures adjust and support the base frame in a completely consistent motion state, which not only improves the support effect of the base frame, but also makes the force on the base frame more uniform. The overall traction device has good functionality and stability.
[0019] 3. The present invention provides a convenient lower limb fracture traction device, wherein the base frame is also connected to a clamping assembly, and the clamping assembly includes a spring, a wedge-shaped seat (large at the upper end and small at the lower end) and a pair of clamping arms. The wedge-shaped seat is connected to the housing through the spring, and the lower ends of the clamping arms slide against the wedge-shaped inclined surface of the wedge-shaped seat. When the wedge-shaped seat moves upward, the upper ends of the pair of clamping arms move away from each other, and when the wedge-shaped seat moves downward, the upper ends of the pair of clamping arms move closer to each other. When using this traction device to immobilize the affected lower limb, the affected limb is placed on the upper surface of the wedge-shaped seat. Under the weight of the affected limb, the wedge-shaped seat moves downward against the force of the spring, increasing the relative distance between the sides of the pair of clamping arms that abut against the wedge-shaped seat. This reduces the relative distance between the upper ends of the pair of clamping arms, bringing them closer together to clamp and immobilize the affected lower limb, ensuring stability during traction. When removing the affected limb, the wedge-shaped seat moves upward under the force of the spring, causing the upper ends of the pair of clamping arms to move away from each other, facilitating the removal of the limb on its inner side and / or adjustment of the clamping position. The clamping assembly provides good stability for immobilizing the traction limb, meeting clinical needs for rapid response, flexible adjustment, and reliable fixation. The clamping assembly and the adjustable support structure are connected by a linkage assembly, which includes a driving spur gear, a driven spur gear, a driving bevel gear, a linkage seat, a limiting component, a linkage cylinder, a driven bevel gear, and a threaded rod. The driving spur gear is coaxially and fixedly connected to the main drive gear, the driven spur gear meshes with the driving spur gear, the driving bevel gear is coaxially and fixedly connected to the driven spur gear, and the driven bevel gear is fixedly connected to the threaded rod, meshing with the driving bevel gear. The linkage cylinder is connected to the threaded rod via a thread, and the limiting component is sleeved on the outside of the linkage cylinder to restrict its rotation. The adjustment handle is rotated to adjust... When the height of the base frame is adjusted, the wedge seat moves accordingly under the action of the spur gear set (driving spur gear, driven spur gear), the bevel gear set (driving bevel gear, driven bevel gear), and the thread (linkage cylinder, threaded rod). (When the height of the base frame increases, the height of the wedge seat increases accordingly; conversely, when the height of the base frame decreases, the height of the wedge seat decreases accordingly.) By controlling the transmission ratio of the gears and the lead of the thread, the amount of movement of the two (base frame and wedge seat) can be kept consistent. This ensures that during the adjustment of the base frame height, the pair of clamping arms can always maintain a relatively stationary state with respect to the base frame, thus ensuring the independent functionality of the clamping assembly.
[0020] 4. The present invention provides a convenient lower limb fracture traction device, wherein a ball is connected to the lower side of the clamping arm and a groove is opened on the wedge-shaped inclined surface of the wedge seat. The ball and the groove guide and limit the relative movement of the two (clamping arm and wedge seat) to ensure the uniformity and stability of the relative movement of the two (clamping arm and wedge seat), thereby ensuring the functionality and stability of the clamping assembly; the upper side of the clamping arm is connected to the clamping ball. When the upper sides of a pair of clamping arms approach each other to clamp the affected limb, the pair of clamping balls have an automatic centering function under the action of the wedge-shaped linkage block and the pair of clamping arms, so that the clamped limb is in the middle of the pair of clamping balls, ensuring the uniformity of the force on the limb during the clamping process, and the stability during the clamping process is also better.
[0021] 5. This invention provides a convenient lower limb fracture traction device. The base frame has a sliding groove, and a support plate is rotatably connected to a slider slidably disposed inside the groove. The groove and slider guide and limit the relative movement of the two (support plate and base frame) to ensure the uniformity and stability of their relative movement. The adjustment component includes a lower support seat, an internally threaded cylinder, and an upper support seat. The upper and lower support seats are respectively connected to the upper and lower ends of the internally threaded cylinder by threads with opposite directions. Rotating the internally threaded cylinder causes the upper and lower support seats to move towards each other (moving away from or closer to each other) under the action of the threads, thereby adjusting the height and / or position of the support plate. The horizontal angle of the base frame; the lower support base is connected to a handle with a push-pull adjustment component, which improves the ease of operation for adjusting the horizontal position of the support plate relative to the base frame (the entire length of the traction device); both the base frame and the linkage bracket are equipped with a placement part, which is equipped with a flexible cloth. When using this traction device to pull the affected limb, the limb is placed on the flexible cloth, which can effectively improve the comfort of use; the side of the linkage bracket away from the base frame / the side that abuts against the reference surface (bed surface) is arc-shaped. Under different angles relative to the base frame, the contact area between the linkage bracket and the reference surface can be effectively guaranteed, ensuring the stability of the traction device during use. Attached Figure Description
[0022] Figure 1 This is a side view of a convenient lower limb fracture traction device according to the present invention;
[0023] Figure 2 for Figure 1 Sectional view of AA;
[0024] Figure 3 This is a front view of a convenient lower limb fracture traction device according to the present invention;
[0025] Figure 4 for Figure 3 Sectional view of BB;
[0026] Figure 5 for Figure 3Sectional view of CC;
[0027] Figure 6 This is a schematic diagram of the structure of a convenient lower limb fracture traction device according to the present invention.
[0028] The names of the corresponding labels in the attached diagram are:
[0029] 1. Base frame; 2. Support assembly; 3. Adjustment handle; 4. Linkage bracket; 5. Flexible fabric; 6. Support plate; 7. Fixing rope; 8. Adjustment assembly; 9. Handle; 10. Clamping assembly; 11. Slide groove; 12. Box body; 13. Lead screw; 14. Linkage component; 15. Lower linkage rod; 16. Upper linkage rod; 17. Main drive gear; 18. Driven drive gear; 19. Lower support seat; 20. Internal threaded cylinder; 21. Upper support seat; 22. Spring; 23. Wedge seat; 24. Clamping arm; 25. Rolling ball; 26. Clamping ball; 27. Driving spur gear; 28. Driven bevel gear; 29. Linkage seat; 30. Limiting component; 31. Linkage cylinder; 32. Driven bevel gear; 33. Threaded rod; 34. Detailed Implementation
[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:
[0031] like Figures 1 to 6 As shown, a convenient lower limb fracture traction device includes a base frame 1, which is connected to a linkage bracket 4, a support assembly 2, and a support plate 6. The linkage bracket 4 is rotatably connected to the base frame 1, and the side of the linkage bracket 4 away from the base frame 1 is arc-shaped. Both the base frame 1 and the linkage bracket 4 are provided with a placement part, and the placement part is provided with a flexible fabric 5. The support assembly 2 includes a housing 12, which is connected to an adjustment handle 3 and an adjustable support structure. The adjustable support structure includes a lead screw 13 rotatably connected to the housing 12. The adjustment handle 3 and the lead screw 13 are connected by a gear set, and the adjustment handle 3 is located on the outside of the housing 12. The lead screw 13 is connected to a pair of linkage members 14 by threads with opposite directions. The pair of linkage members 14 are respectively connected to a lower linkage rod 15 and an upper linkage rod 16. The lower linkage rod 15 The lower end of the upper linkage rod 16 is rotatably connected to the bottom wall of the housing 12, and the upper end of the upper linkage rod 16 is rotatably connected to the base frame 1. By adjusting the handle 3 to rotate the screw 13, a pair of linkage parts 14 move towards each other, and the upper end of the upper linkage rod 16 moves in the vertical direction to adjust the horizontal height of the base frame 1. A sliding groove 11 is provided on the side of the base frame 1 away from the linkage bracket 4. A slider is rotatably connected to the support plate 6, and the slider is slidably located inside the sliding groove 11. The support plate 6 is connected to a fixing rope 7 and an adjustment component 8. The adjustment component 8 includes a lower support seat 19, an internal threaded cylinder 20 and an upper support seat 21. The upper support seat 21 and the lower support seat 19 are respectively connected to the upper and lower ends of the internal threaded cylinder 20 by threads with opposite directions of rotation. The lower support seat 19 is connected to a handle 9 of the push-pull adjustment component 8, and the upper support seat 21 is rotatably connected to the support plate 6.
[0032] In this embodiment, the gear set includes a main drive gear 17 and a driven drive gear 18 that mesh with each other. The main drive gear 17 is coaxially and fixedly connected to the adjusting handle 3, and the driven drive gear 18 is coaxially and fixedly connected to the lead screw 13. There are two adjustable support structures and two driven drive gears 18. The two adjustable support structures are mirror-symmetrically arranged with the vertical center plane of the housing 12 as the reference plane. The two drive gears are respectively externally meshed on the left and right sides of the main drive gear 17.
[0033] In addition, in this embodiment, the base frame 1 is also connected to a clamping assembly 10. The clamping assembly 10 includes a spring 22, a wedge seat 23 and a pair of clamping arms 24. The upper end of the spring 22 is connected to the wedge seat 23. The upper end of the wedge seat 23 is larger and the lower end is smaller. The pair of clamping arms 24 are rotatably connected to the base frame 1. The lower ends of the pair of clamping arms 24 slide against the wedge-shaped inclined surface of the wedge seat 23. Specifically, a ball 25 is rotatably connected to the lower side of the clamping arm 24. The wedge-shaped inclined surface of the wedge seat 23 has a groove. The ball 25 rolls inside the groove. A clamping ball 26 is connected to the upper side of the clamping arm 24. When the wedge seat 23 moves upward, the upper ends of the pair of clamping arms 24 move away from each other. When the wedge seat 23 moves downward, the upper ends of the pair of clamping arms 24 move closer to each other. The clamping assembly 10 is connected to the adjustable support structure via a linkage assembly. The linkage assembly includes a driving spur gear 27, a driven spur gear 28, a driving bevel gear 29, a linkage seat 30, a limiting member 31, a linkage cylinder 32, a driven bevel gear 33, and a threaded rod 34. The driven spur gear 28 and the threaded rod 34 are rotatably connected to the housing 12, and the limiting member 31 is fixedly connected to the housing 12. The driving spur gear 27 is coaxially fixedly connected to the main drive gear 17, and the driven spur gear 28 is fixedly connected to the main drive gear 17. 8 meshes with the driving spur gear 27, the driving bevel gear 29 is coaxially and fixedly connected with the driven spur gear 28, the driven bevel gear 33 is fixedly connected with the threaded rod 34, and the driven bevel gear 33 meshes with the driving bevel gear 29; the linkage cylinder 32 is threadedly connected to the upper side of the threaded rod 34, and the limiting member 31 is sleeved on the outside of the linkage cylinder 32 to limit its rotation; the linkage seat 30 is fixedly connected to the upper side of the linkage cylinder 32, and the side of the spring 22 away from the wedge seat 23 is connected to the linkage seat 30.
[0034] The specific implementation process is as follows:
[0035] When using this lower limb fracture traction device, place the entire traction device on the reference plane / bed surface, with the end of the linkage furthest from the base frame 1, the lower end of the housing 12, and the lower end of the lower support 19 abutting against the upper end of the bed surface. Adjust the horizontal height of the base frame 1 by rotating the adjustment handle 3 as needed, and simultaneously use the pull handle 9 to push and pull the adjustment assembly 8 to adjust the horizontal position of the support plate 6 relative to the base frame 1 (the overall length of the traction device). Also, rotate the internal threaded cylinder 20 as needed to adjust the horizontal height of the support plate 6 furthest from the slider (the horizontal position of the support plate 6 relative to the base frame 1). (Horizontal angle of frame 1), finally place the thigh of the affected lower limb on the flexible cloth 5 on the linkage bracket 4, place the lower leg between a pair of clamping balls 26, use the pair of clamping balls 26 to clamp and fix the lower leg, place the foot on the support plate 6, and use the fixing rope 7 to fix and bind the foot to the support plate 6; finally, according to clinical needs, rotate the adjustment handle 3 to adjust the height of its base frame 1, push and pull the handle 9 to adjust the horizontal position of the support plate 6, and rotate the internal threaded cylinder 20 to adjust the horizontal angle of the support plate 6, so as to provide stable and effective traction for the patient's lower limb.
[0036] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A convenient lower limb fracture traction device, characterized in that, The system includes a base frame, which is connected to a support assembly, a linkage bracket, and a support plate. The support assembly includes a housing, which is connected to an adjustable support structure and an adjustment handle. The adjustment handle is used to adjust the height of the adjustable support structure, and the base frame is connected to the adjustment end of the adjustable support structure. The linkage bracket is rotatably connected to the base frame. The support plate is slidably and adjustablely connected to the base frame, and the support plate is connected to a fixing rope and an adjustment assembly. The adjustment assembly is used to adjust the horizontal position and horizontal tilt angle of the support plate relative to the base frame.
2. The portable lower limb fracture traction device according to claim 1, characterized in that, The adjustable support structure includes a lead screw rotatably connected to the housing, an adjustment handle being drivenly connected to the lead screw, and the adjustment handle being located on the outside of the housing; the lead screw is connected to a pair of linkages via threads of opposite directions, the pair of linkages being respectively connected to a lower linkage rod and an upper linkage rod, the lower end of the lower linkage rod being rotatably connected to the bottom wall of the housing, and the upper end of the upper linkage rod being rotatably connected to the base frame; by rotating the lead screw through the adjustment handle, the pair of linkages move towards each other, and the upper end of the upper linkage rod moves in the vertical direction to adjust the horizontal height of the base frame.
3. A convenient lower limb fracture traction device according to claim 2, characterized in that, The adjusting handle and the lead screw are connected by a gear set, which includes a main drive gear and a driven drive gear that mesh with each other. The main drive gear is coaxially and fixedly connected to the adjusting handle, and the driven drive gear is coaxially and fixedly connected to the lead screw. There are two adjustable support structures and two driven drive gears. The two adjustable support structures are mirror-symmetrically arranged with the vertical center plane of the housing as the reference plane. The two drive gears are respectively externally meshed on the left and right sides of the main drive gear.
4. A convenient lower limb fracture traction device according to claim 3, characterized in that, The base frame is also connected to a clamping assembly, which includes a spring, a wedge-shaped seat, and a pair of clamping arms. The lower end of the spring is connected to the housing, and the upper end of the spring is connected to the wedge-shaped seat. The wedge-shaped seat has a larger upper end and a smaller lower end. Both clamping arms are rotatably connected to the base frame, and the lower ends of both clamping arms slide against the wedge-shaped inclined surface of the wedge-shaped seat. When the wedge-shaped seat moves upward, the upper ends of the pair of clamping arms move away from each other, and when the wedge-shaped seat moves downward, the upper ends of the pair of clamping arms move closer to each other.
5. A convenient lower limb fracture traction device according to claim 4, characterized in that, The clamping assembly and the adjustable support structure are connected by a linkage assembly, which includes a driving spur gear, a driven spur gear, a driving bevel gear, a linkage seat, a limiting member, a linkage cylinder, a driven bevel gear, and a threaded rod. The driven spur gear and the threaded rod are rotatably connected to the housing, and the limiting member is fixedly connected to the housing. The driving spur gear is coaxially and fixedly connected to the main drive gear, the driven spur gear meshes with the driving spur gear, the driving bevel gear is coaxially and fixedly connected to the driven spur gear, the driven bevel gear is fixedly connected to the threaded rod, and the driven bevel gear meshes with the driving bevel gear. The linkage cylinder is threaded to the upper side of the threaded rod, and the limiting member is sleeved on the outside of the linkage cylinder to restrict its rotation. The linkage seat is fixedly connected to the upper side of the linkage cylinder, and the side of the spring away from the wedge-shaped seat is connected to the linkage seat.
6. A convenient lower limb fracture traction device according to claim 5, characterized in that, A ball is rotatably connected to the lower side of the clamping arm, and a groove is opened on the wedge-shaped inclined surface of the wedge seat, with the ball rolling inside the groove.
7. A convenient lower limb fracture traction device according to claim 5, characterized in that, A clamping ball is connected to the upper side of the clamping arm.
8. A convenient lower limb fracture traction device according to claim 1, characterized in that, A sliding groove is provided on the side of the base frame away from the linkage bracket, and a slider is rotatably connected to the support plate. The slider is slidably disposed inside the sliding groove.
9. A convenient lower limb fracture traction device according to claim 8, characterized in that, The adjusting assembly includes a lower support, an internally threaded cylinder, and an upper support. The upper and lower support are connected to the upper and lower ends of the internally threaded cylinder by threads with opposite directions of rotation. The lower support is connected to a handle for pushing and pulling the adjusting assembly. The upper support is rotatably connected to the support plate.
10. A convenient lower limb fracture traction device according to claim 1, characterized in that, Both the base frame and the linkage bracket are provided with a placement part, the placement part is provided with flexible fabric, and the side of the linkage bracket away from the base frame is arc-shaped.