Traction device for orthopedic care

Abstract

This invention relates to the field of medical device technology, specifically to a traction device for orthopedic nursing. Its features include: a mounting plate, a spring balancer, a tension gauge, a guide wheel, a support rod, and a traction force adjustment assembly. The mounting plate is detachably connected to the bed frame via a connecting mechanism. The spring balancer is detachably connected to the mounting plate, and its installation position is adjustable along the length of the mounting plate. The support rod is located above the spring balancer and connected to the mounting plate, with its installation position also adjustable along the length of the mounting plate. The guide wheel is rotatably mounted on the top of the support rod. The end of the pull rope of the spring balancer is detachably connected to the fixed end of the tension gauge. The pull rope passes around the guide wheel, and the measuring end of the tension gauge is detachably connected to the traction bow. The traction force adjustment assembly is located on the spring balancer and is driven by its adjustment spindle. This invention facilitates the most precise adjustment of the traction force according to the patient's actual needs and effectively ensures the stability and safety of the traction process.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a traction device for orthopedic nursing. Background Technology

[0002] Traction is a commonly used treatment method in orthopedics. Currently, the most common traction method used in clinical treatment involves adding weights to the traction rope for suspension traction. The disadvantages of this method are that adding weights to the traction rope requires calculating the weight of the weights and then selecting various weights. During the process of adding or removing weights, the weights may accidentally fall to the ground, posing a risk of accidental injury to family members or patients. It is relatively inconvenient to use. In addition, since the weights are objects with a pre-set weight, using the weights as the source of traction force cannot make the most precise adjustment to the traction force actually needed by the patient. Furthermore, the weights are prone to swaying and shaking under the action of external forces during traction, which affects the stability of the traction. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an orthopedic nursing traction device that facilitates the most precise adjustment of traction force according to the actual needs of the patient and effectively ensures the stability and safety of the traction process.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a traction device for orthopedic nursing, comprising a mounting plate, a spring balancer, a tension gauge, a guide wheel, a support rod, and a traction force adjustment assembly. The mounting plate is detachably connected to the bed frame via a connecting mechanism. The spring balancer is detachably connected to the mounting plate, and its installation position is adjustable along the length of the mounting plate. The support rod is located above the spring balancer and is connected to the mounting plate, and its installation position is adjustable along the length of the mounting plate. The guide wheel is rotatably mounted on the top of the support rod. The end of the pull rope of the spring balancer is detachably connected to the fixed end of the tension gauge. The pull rope passes around the guide wheel and detachably connects the measuring end of the tension gauge to the traction bow. The traction force adjustment assembly is located on the spring balancer and is drivenly connected to its adjustment main shaft. The traction force adjustment assembly is used to adjust the traction force applied by the spring balancer to the traction bow through the pull rope.

[0005] Furthermore, the traction adjustment assembly includes a drive motor, a controller, a fixed housing, a planetary transmission mechanism, and a manual self-locking drive mechanism. The planetary transmission mechanism has a first motion input end, a second motion input end, and a motion output end. The motion inputs from the first and second motion input ends can be output individually from the motion output end. The planetary transmission mechanism is rotatably mounted in the inner cavity of the fixed housing. The fixed housing is fixedly connected to the housing of the spring balancer via a connecting plate. The drive motor is driven by the first motion input end of the planetary transmission mechanism. The drive motor is a worm gear reducer stepper motor, which is fixedly mounted on a motor mount. The motor mount is fixedly mounted on the fixed housing. The manual self-locking drive mechanism is driven by the second motion input end of the planetary transmission mechanism. The motion output end of the planetary transmission mechanism is driven by the adjusting main shaft of the spring balancer.

[0006] Furthermore, the planetary transmission mechanism includes a rotating housing, a planet carrier, planet gears, and a sun gear. The rotating housing has a rotating cavity and is located within the cavity of the fixed housing. The rotating housing is rotatably connected to the fixed housing via a front bearing and a rear bearing. An internal gear ring is coaxially fixed on the inner circumferential surface of the rotating housing, and a worm gear is coaxially fixed on the outer circumferential surface of the rotating housing. The fixed housing has an arc-shaped notch corresponding to the worm gear, which serves as the second motion input end. The planet carrier, planet gears, and sun gear are all located within the rotating cavity. An output shaft is fixed at the center of one end face of the sun gear, serving as the motion output end. The output shaft is rotatably connected to the rotating housing via a first bearing and extends out of the rotating housing. Multiple planet shafts are fixed on one end face of the planet carrier. Multiple planet gears are arranged corresponding to each of the multiple planet shafts and are evenly distributed along the circumference of the sun gear. The planet gears are rotatably connected to the planet shafts via a second bearing and mesh with both the sun gear and the internal gear ring for transmission. A central shaft is fixed at the center of the other end face of the planet carrier. The central shaft is rotatably connected to the rotating housing via a third bearing and extends out of both the rotating housing and the fixed housing. The central shaft serves as the first motion input end.

[0007] Furthermore, the manual self-locking drive mechanism includes a worm gear and a drive plate. The worm gear is rotatably mounted on a support base, which is fixedly mounted on a fixed housing. The worm gear meshes with a worm wheel for transmission. The drive plate is fixedly mounted on one end of the worm gear and has a hexagonal drive hole.

[0008] Furthermore, the controller includes a control box, a control board, a power supply, a switch button, a forward button, and a reverse button. The drive motor, the power supply, the switch button, the forward button, and the reverse button are all electrically connected to the control board. The control box is fixedly installed on the housing of the spring balancer. The control board and the power supply are fixedly installed inside the control box. The switch button, the forward button, and the reverse button are all installed on the outer surface of the control box.

[0009] Furthermore, the spring balancer has a rope stop mechanism at the rope outlet. This mechanism includes a limit rod, a frustum cylinder, steel balls, a compression spring, a limit sleeve, and an adjusting nut. The frustum cylinder has a frustum cavity extending through both ends. The limit rod is coaxially mounted with the frustum cylinder and is axially movable within the frustum cavity. One end of the frustum cylinder has a sliding cavity adapted to the limit rod. One end of the limit rod extends out of the sliding cavity, and a guide assembly is provided between them. The guide assembly includes a guide block and a guide groove. The guide block is fixed to the inner circumferential surface of the sliding cavity of the frustum cylinder. The guide groove is located on the outer circumferential surface of the limit rod and extends through its upper end. The guide block is adapted to the guide groove and engaged within it. The limit rod has a through-hole... The rope-threading channels at both ends of the limiting rod are provided with multiple limiting holes evenly arranged along its circumference and communicating with the rope-threading channels. The limiting holes contain matching and movable steel balls. The limiting sleeve is located at one end of the large opening of the frustum cylinder. The limiting sleeve contains a limiting cavity that opens to one end and is compatible with the frustum cylinder. The limiting sleeve is fitted onto the outside of the frustum cylinder through the limiting cavity and the two are fixedly connected. The other end face of the limiting sleeve has a through hole that communicates with the limiting cavity and is compatible with the limiting rod. The other end of the limiting rod passes through the through hole and is threadedly connected to the adjusting nut. An annular protrusion is fixedly provided on the outer circumference of the limiting rod. A compression spring is fitted onto the limiting rod and abuts against the annular protrusion and the inner bottom surface of the limiting sleeve.

[0010] Furthermore, the support rod includes an outer rod body, an inner rod body, a first locking knob, and a second locking knob. The outer rod body has a telescopic cavity adapted to the inner rod body. The inner rod body is sleeved in the telescopic cavity of the outer rod body, and the two are slidably fitted together. A guide wheel is provided on the inner rod body, and an annular guide groove is provided on the outer circumference of the guide wheel. A limiting frame for covering the guide wheel is fixedly provided at the top of the inner rod body. A first locking knob for locking and fixing the sliding of the inner rod body is threadedly connected to the outer rod body. A connecting hole is provided at the bottom of the outer rod body. The connecting hole is round. A connecting crossbar adapted to the connecting hole is fixedly provided on the mounting plate. The outer rod body is slidably sleeved on the connecting crossbar through the connecting hole. A second locking knob for locking and fixing the sliding of the outer rod body is threadedly connected to the outer rod body.

[0011] Furthermore, a connecting screw is fixedly connected to the end of the pull rope, a connecting sleeve is fixedly connected to the fixed end of the tension gauge, the connecting screw is threaded into the connecting sleeve, a connecting buckle is fixedly connected to the measuring end of the tension gauge, a connecting ring is fixedly connected to the traction bow, and the connecting buckle is detachably fastened to the connecting ring.

[0012] Furthermore, the mounting plate is provided with a plurality of mounting holes evenly distributed along its length. The mounting holes are square in shape. A mounting post is fixedly provided at the center of one side surface of the spring balancer housing. The mounting post passes through the mounting hole and is threaded with a locking nut. A mounting protrusion that matches the mounting hole is fixedly provided on the outer circumference of the mounting post. The length of the mounting protrusion is less than the depth of the mounting hole.

[0013] Furthermore, there are two connecting mechanisms, which are respectively located at the left and right ends of the mounting plate. The connecting mechanism includes a locking block, a locking cover, and a third locking knob. The locking block is fixedly mounted on the mounting plate. One end of the locking cover is hinged to the locking block, and the other end is detachably connected to the locking block through the third locking knob. The locking cover and the locking block together form a locking cavity that is adapted to the vertical rod of the bed frame.

[0014] As described above, the orthopedic traction device provided by this invention has the following beneficial effects: the spring balancer can maintain traction on the traction bow through the pull rope. By adjusting the preload of the coil spring in the spring balancer through the traction force adjustment component, the magnitude of the traction force applied to the traction bow can be adjusted. The operation of adjusting the traction force is simpler, more convenient and safer to use, and less likely to cause accidental injury to family members or patients. At the same time, with the real-time monitoring of the tension gauge, the traction force applied to the traction bow by the spring balancer can be precisely adjusted, making it easier to make the most accurate adjustment according to the actual traction force required by the patient. Furthermore, the spring balancer is mounted on the bed frame through a mounting plate. The installation position of the spring balancer on the mounting plate is adjustable, which can well adapt to different traction positions of the patient. During the traction process, it can effectively ensure the stability of the spring balancer's placement position and is not prone to swaying or shaking under external force, thus better ensuring the stability of the traction process. At the same time, the guide wheel at the top of the support rod can guide the traction of the pull rope to ensure smooth traction. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the traction device for orthopedic nursing of the present invention.

[0016] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0017] Figure 3 for Figure 1 A magnified view of a portion of point B in the middle.

[0018] Figure 4 This is a schematic diagram of the internal structure when the traction adjustment component is connected to the spring balancer.

[0019] Figure 5 for Figure 4 A magnified view of a portion of point C.

[0020] Figure 6 This is a schematic diagram of the internal structure of the rope-pulling stop mechanism.

[0021] Figure 7 This is a three-dimensional exploded view of the rope-pulling stop mechanism.

[0022] Figure 8 This is a schematic diagram of the three-dimensional structure of the support rod.

[0023] Figure 9 This is a schematic diagram of the internal three-dimensional structure of a planetary transmission mechanism.

[0024] Figure 10 This is a three-dimensional structural diagram of the connecting mechanism.

[0025] Figure 11 This is a schematic diagram showing the usage state of the orthopedic nursing traction device of the present invention.

[0026] In the diagram: 1-Mounting plate; 11-Connecting crossbar; 12-Mounting hole; 2-Spring balancer; 21-Pull rope; 211-Connecting screw; 22-Adjusting spindle; 23-Mounting column; 231-Mounting protrusion; 232-Locking nut; 3-Force gauge; 31-Connecting sleeve; 32-Connecting buckle; 4-Guide wheel; 5-Support rod; 51-Outer rod body; 511-Connecting hole; 52-Inner rod body; 53-First locking knob; 54-Second locking knob; 55-Limit frame; 6-Traction adjustment assembly; 61-Drive motor; 611-Motor mount; 62-Controller; 621-Control box; 622-Control board; 623-Power supply; 624-Switch button; 625-Forward button; 626-Reverse button; 63-Fixed housing; 631-Connecting plate; 632-Arc-shaped notch; 633-Support base; 64-Planetary transmission mechanism; 641-Rotating housing; 6411-Rotating cavity; 6412 - Internal gear ring; 6413- Worm gear; 6414- Rotating cylinder; 6415- End plate; 642- Planetary carrier; 6421- Planetary shaft; 6422- Central shaft; 643- Planetary gear; 644- Sun gear; 6441- Output shaft; 65- Manual self-locking drive mechanism; 651- Worm; 652- Drive plate; 6521- Drive hole; 7- Connecting mechanism; 71- Locking block; 72- Locking cover; 73- Third locking knob; 74- Locking cavity; 81-Bed frame; 811-Vertical rod; 82-Traction bow; 821-Connecting ring; 9-Rope stop mechanism; 91-Limit rod; 911-Rope passage; 912-Limit hole; 913-Annular protrusion; 92-Frustum cylinder; 921-Frustum cavity; 922-Sliding cavity; 93-Steel ball; 94-Compression spring; 95-Limit sleeve; 951-Limit cavity; 96-Adjusting nut; 97-Guide assembly; 971-Guide block; 972-Guide groove. Detailed Implementation

[0027] The present invention will be further described below through specific embodiments.

[0028] like Figures 1 to 11As shown, the orthopedic nursing traction device of the present invention includes a mounting plate 1, a spring balancer 2, a tension gauge 3, a guide wheel 4, a support rod 5, and a traction force adjustment assembly 6. The mounting plate 1 is detachably connected to the bed frame 81 via a connecting mechanism 7. The spring balancer 2 is detachably connected to the mounting plate 1, and its installation position is adjustable along the length direction of the mounting plate 1. The support rod 5 is located above the spring balancer 2, connected to the mounting plate 1, and its installation position is adjustable along the length direction of the mounting plate 1. The guide wheel 4 is rotatably mounted on the top of the support rod 5. The end of the pull rope 21 of the spring balancer 2 is detachably connected to the fixed end of the tension gauge 3. The pull rope 21 passes around the guide wheel 4, and the measuring end of the tension gauge 3 is detachably connected to the traction bow 82. The traction force adjustment assembly 6 is located on the spring balancer 2 and is drivenly connected to its adjusting main shaft 22. The traction force adjustment assembly 6 is used to adjust the traction force applied by the spring balancer 2 to the traction bow 82 through the pull rope 21.

[0029] The spring balancer 2 can be a product of the prior art, which stores elastic potential energy through a coiled spring to generate tension in the pull rope 21. Therefore, the specific structure of the spring balancer 2 will not be described in detail here. The tension gauge 3 can be a tension gauge 3 with display function in the prior art, which can display the tension value in real time.

[0030] The spring balancer 2 maintains traction on the traction bow 82 via the pull rope 21. Adjusting the preload of the coil spring within the spring balancer 2 via the traction force adjustment component 6 adjusts the magnitude of the traction force applied to the traction bow 82. This adjustment is simpler, more convenient, and safer, reducing the risk of accidental injury to family members or patients. Simultaneously, the real-time monitoring by the tension gauge 3 allows for precise adjustment of the traction force applied by the spring balancer 2 to the traction bow 82, facilitating the most accurate adjustment based on the patient's actual traction needs. The spring balancer 2 is mounted on the bed frame 81 via the mounting plate 1. The mounting position of the spring balancer 2 on the mounting plate 1 is adjustable, adapting well to different patient traction positions. During traction, it effectively ensures the stability of the spring balancer 2's placement, preventing swaying under external forces and ensuring greater stability during the traction process. Furthermore, the guide wheel 4 at the top of the support rod 5 guides the pull rope 21, ensuring smooth traction.

[0031] The traction adjustment assembly 6 includes a drive motor 61, a controller 62, a fixed housing 63, a planetary transmission mechanism 64, and a manual self-locking drive mechanism 65. The planetary transmission mechanism 64 has a first motion input end, a second motion input end, and a motion output end. Motion inputs from both the first and second motion input ends can be output individually from the motion output end. The planetary transmission mechanism 64 is rotatably mounted within the cavity of the fixed housing 63. The fixed housing 63 is fixedly connected to the housing of the spring balancer 2 via a connecting plate 631. The drive motor 61 is connected to the first motion input end of the planetary transmission mechanism 64. The drive motor 61 is a worm gear 6413 worm 651 reduction stepper motor. The motor is fixedly mounted on the motor base 611, which is fixedly mounted on the fixed housing 63. The manual self-locking drive mechanism 65 is connected to the second motion input end of the planetary transmission mechanism 64, and the motion output end of the planetary transmission mechanism 64 is connected to the adjusting main shaft 22 of the spring balancer 2. This allows the adjusting main shaft 22 of the spring balancer 2 to be rotated forward or backward by the drive motor 61 or the manual self-locking drive mechanism 65, thereby adjusting the preload of the coil spring in the spring balancer 2. Ultimately, this adjusts the traction force applied by the spring balancer 2 to the traction bow 82 through the pull rope 21. It has both electric and manual adjustment modes, making it more versatile.

[0032] In addition, the worm gear 6413, worm 651, reduction stepper motor, and manual self-locking drive mechanism 65 can all play a self-locking role, so that the adjusting main shaft 22 of the spring balancer 2 is in a corresponding stable adjustment position.

[0033] Correspondingly, the planetary transmission mechanism 64 includes a rotating housing 641, a planet carrier 642, planet gears 643, and a sun gear 644. The rotating housing 641 has a rotating cavity 6411. The rotating housing 641 is located within the inner cavity of the fixed housing 63 and is rotatably connected to the fixed housing 63 via a front bearing and a rear bearing. An internal gear ring 6412 is coaxially fixed to the inner circumferential surface of the rotating housing 641, and a worm gear 6413 is coaxially fixed to the outer circumferential surface of the rotating housing 641. The fixed housing 63 has an arc-shaped notch 632 corresponding to the worm gear 6413. The worm gear 6413 is the second motion input end. The planet carrier 642, planet gears 643, and sun gear 644 are all located within the rotating cavity 6411. An output shaft 6441 is fixed to the center of one end face of the sun gear 644. Shaft 6441 is the motion output end. The output shaft 6441 is rotatably connected to the rotating housing 641 through a first bearing and extends out of the rotating housing 641. Multiple planetary shafts 6421 are fixedly provided on one side end face of the planet carrier 642. Multiple planetary gears 643 are provided, each corresponding to one of the multiple planetary shafts 6421 and evenly arranged along the circumferential direction of the sun gear 644. The planetary gears 643 are rotatably connected to the planetary shafts 6421 through a second bearing and mesh with the sun gear 644 and the internal gear ring 6412 for transmission. A central shaft 6422 is fixedly provided at the center of the other side end face of the planet carrier 642. The central shaft 6422 is rotatably connected to the rotating housing 641 through a third bearing and extends out of the rotating housing 641 and the fixed housing 63. The central shaft 6422 is the first motion input end.

[0034] When the rotating housing 641 and the internal gear ring 6412 are fixed, when the driving central shaft 6422 drives the planetary carrier 642 to rotate, the planetary gears 643 can rotate around the sun gear 644. At the same time, through the meshing and transmission of multiple planetary gears 643 and the sun gear 644, the sun gear 644 can be driven to rotate, thereby driving the output shaft 6441 to rotate synchronously and achieving a single output of motion. When the central shaft 6422 and the planetary carrier 642 are fixed, when the driving worm gear 6413 drives the rotating housing 641 to rotate and drives the internal gear ring 6412 to rotate synchronously, through the meshing and transmission of the internal gear ring 6412 with multiple planetary gears 643 and through the meshing and transmission of multiple planetary gears 643 with the sun gear 644, the sun gear 644 can be driven to rotate, thereby driving the output shaft 6441 to rotate synchronously and achieving a single output of motion.

[0035] The rotating housing 641 includes a rotating cylinder 6414 and an end plate 6415. The rotating cavity 6411 is disposed inside the rotating cylinder 6414 and extends through one end of it. The other end face of the rotating cylinder 6414 has a first rotating hole at its center for the central shaft 6422 to pass through. The internal gear ring 6412 and the worm gear 6413 are both disposed on the rotating cylinder 6414. The end plate 6415 is fixedly installed at one end opening of the rotating cylinder 6414. The end plate 6415 has a second rotating hole at its center for the output shaft 6441 to pass through.

[0036] Furthermore, the inner cavity of the fixed shell 63 extends through one end, and the other end of the fixed shell 63 is provided with a third rotating hole for rotatably mounting the rotating shell 641.

[0037] Correspondingly, a transmission groove is provided at the center of one end face of the adjusting main shaft 22 of the spring balancer 2. The transmission groove is hexagonal in shape. A transmission protrusion adapted to the transmission groove is fixedly provided at the center of one end face of the output shaft 6441. The transmission protrusion is embedded in the transmission groove, thereby realizing the transmission connection between the output shaft 6441 and the adjusting main shaft 22 of the spring balancer 2.

[0038] The manual self-locking drive mechanism 65 includes a worm gear 651 and a drive plate 652. The worm gear 651 is rotatably mounted on a support base 633, and the support base 633 is fixedly mounted on a fixed housing 63. The worm gear 651 meshes with the worm wheel 6413 for transmission. The drive plate 652 is fixedly mounted on one end of the worm gear 651. The drive plate 652 has a hexagonal drive hole 6521, which facilitates the insertion of a corresponding tool into the drive hole 6521 to drive the worm gear 651 to rotate, thereby driving the worm wheel 6413 to rotate, and ultimately achieving the adjustment of the spring balancer 2.

[0039] The controller 62 includes a control box 621, a control board 622, a power supply 623, a switch button 624, a forward rotation button 625, and a reverse rotation button 626. The drive motor 61, the power supply 623, the switch button 624, the forward rotation button 625, and the reverse rotation button 626 are all electrically connected to the control board 622. The control box 621 is fixedly mounted on the housing of the spring balancer 2. The control board 622 and the power supply 623 are fixedly mounted inside the control box 621. The switch button 624, the forward rotation button 625, and the reverse rotation button 626 are... All are installed on the outer surface of the control box 621. This allows for easy control of the drive motor 61's forward or reverse rotation by pressing the forward rotation button 625 and the reverse rotation button 626. This, in turn, drives the adjusting spindle 22 of the spring balancer 2 to rotate forward or reverse, thereby adjusting the preload of the coil spring within the spring balancer 2 in real time. Ultimately, this adjusts the traction force applied by the spring balancer 2 to the traction bow 82, facilitating the setting of the traction force according to the patient's actual traction needs. Preferably, the power supply 623 is a lithium battery, and the control board 622 integrates corresponding control functions.

[0040] The spring balancer 2 is equipped with a rope-pulling stop mechanism 9 at the rope outlet. The rope-pulling stop mechanism 9 includes a limiting rod 91, a frustum cylinder 92, a steel ball 93, a compression spring 94, a limiting sleeve 95, and an adjusting nut 96. The frustum cylinder 92 has a frustum cavity 921 extending through both ends. The limiting rod 91 is coaxially arranged with the frustum cylinder 92 and is axially movable within the frustum cavity 921. One end of the frustum cylinder 92 has a sliding cavity 922 adapted to the limiting rod 91. One end of the rod 91 extends out of the sliding cavity 922, and a guide assembly 97 is provided between them. The guide assembly 97 includes a guide block 971 and a guide groove 972. The guide block 971 is fixedly disposed on the inner circumferential surface of the sliding cavity 922 of the frustum cylinder 92. The guide groove 972 is disposed on the outer circumferential surface of the limiting rod 91 and extends through its upper end. The guide block 971 is adapted to the guide groove 972 and is engaged within the guide groove 972. The limiting rod 91 has a rope-passing channel 911 extending through both ends. The outer circumferential surface of the rod 91 is provided with a plurality of limiting holes 912 evenly arranged along its circumference and communicating with the rope-threading channel 911. Each limiting hole 912 contains a matching and movable steel ball 93. A limiting sleeve 95 is located at one end of the large opening of the frustum-shaped cylinder 92. The limiting sleeve 95 contains a limiting cavity 951 that opens to one end and is adapted to the frustum-shaped cylinder 92. The limiting sleeve 95 is fitted onto the outside of the frustum-shaped cylinder 92 through the limiting cavity 951, and the two are fixedly connected. Correspondingly, the limiting... The limiting sleeve 95 and the frustum cylinder 92 are connected by a thread or screw. The other end face of the limiting sleeve 95 is provided with a through hole that communicates with the limiting cavity 951 and is adapted to the limiting rod 91. The other end of the limiting rod 91 passes through the through hole and is threadedly connected to the adjusting nut 96. An annular protrusion 913 is fixedly provided on the outer circumferential surface of the limiting rod 91. The compression spring 94 is sleeved on the limiting rod 91 and abuts against the annular protrusion 913 and the inner bottom surface of the limiting sleeve 95.

[0041] When the adjusting nut 96 is tightened, it remains against the outer bottom surface of the limiting sleeve 95. Combined with the guiding effect of the guide block 971 and the guide groove 972 on the movement of the limiting rod 91, it drives the limiting rod 91 towards the large opening end of the frustum cylinder 92, further compressing the compression spring 94. Simultaneously, multiple steel balls 93 within the limiting rod 91 move together towards the large opening end of the frustum cylinder 92. After the adjusting nut 96 is tightened, the position of the limiting rod 91 is fixed under the cooperation of the adjusting nut 96 and the compression spring 94. At this time, the steel balls 93 are movable within the limiting hole 912, and the inner frustum surface of the frustum cavity 921 does not exert relative pressure on the steel balls 93. Therefore, the multiple steel balls 93 do not clamp the pull rope 21 within the rope passage 911, allowing the pull rope 21 to move freely within the rope passage 911.

[0042] When the adjusting nut 96 is completely loosened, ensuring it never abuts against the outer bottom surface of the limiting sleeve 95, the limiting rod 91 is only subjected to the elastic force of the compression spring 94 due to the absence of the limiting effect of the adjusting nut 96. The compression spring 94 maintains an elastic force on the limiting rod 91 that pushes multiple steel balls 93 towards the narrow end of the frustum cavity 921. With the cooperation of the inner frustum surface of the frustum cavity 921, the multiple steel balls 93 move synchronously towards the central axis 6422 of the rope channel 911. Thus, in conjunction with the use of the frustum cylinder 92, which has a frustum cavity 921 with one open end and a smaller opening at the other, and an inner frustum surface, the inner diameter of the frustum cavity 921 gradually decreases. In this way, under the elastic force maintained by the compression spring 94 on the limiting rod 91, multiple steel balls 93 can be pushed towards the frustum cavity 921. The narrow end of the cylinder 1 moves and, with the cooperation of the inner frustum surface of the frustum cavity 921, causes multiple steel balls 93 to move synchronously toward the central axis 6422 of the rope channel 911. The contact between the frustum cylinder 92 and the steel balls 93 is achieved through the inner frustum surface of the frustum cavity 921 and the spherical surface of the steel balls 93, directly limiting the position of the steel balls 93. This enhances the clamping strength of the multiple steel balls 93 on the pull rope 21 and enables rapid clamping of the pull rope 21. The clamping mechanism 9 acts as a stop for the pull rope 21. When the tension gauge 3 separates from the traction bow 82, it effectively prevents the spring balancer 2 from retracting the pull rope 21, thus acting as a safety lock. When skin traction requires checking the skin condition, or bone traction requires temporary disassembly for inspection, the pull rope 21 can be clamped by the pull rope stop mechanism 9, preventing the pull rope 21 from being retracted by the spring balancer 2, thus facilitating subsequent operations.

[0043] Preferably, the outer diameter of the steel ball 93 is not less than the inner diameter of the rope channel 911. When the multiple steel balls 93 in the limiting rod 91 are all tangent to each other, the diameter of the outer tangent circle that is tangent to the multiple steel balls 93 is greater than the maximum outer diameter of the limiting rod 91.

[0044] The support rod 5 includes an outer rod body 51, an inner rod body 52, a first locking knob 53, and a second locking knob 54. The outer rod body 51 has a telescopic cavity adapted to the inner rod body 52. ​​The inner rod body 52 is sleeved within the telescopic cavity of the outer rod body 51, and the two are slidably fitted together. The guide wheel 4 is disposed on the inner rod body 52, and the outer circumferential surface of the guide wheel 4 has an annular guide groove 972. A limiting frame 55 for covering the guide wheel 4 is fixedly provided at the top of the inner rod body 52. ​​A threaded connection is made to the outer rod body 51 to lock and fix the sliding of the inner rod body 52. The first locking knob 53 is used to facilitate the adjustment of the overall telescopic length of the support rod 5, thereby adjusting the guiding position of the guide wheel 4 to a certain extent. Correspondingly, the outer rod body 51 is provided with a third threaded hole communicating with the telescopic cavity. When the first locking knob 53 is tightened, the end of the first locking stud of the first locking knob 53 can abut against the outer surface of the inner rod body 52, thereby locking and fixing the inner rod body 52. ​​When the first locking knob 53 is loosened, the inner rod body 52 can be slid easily to adjust the overall length of the support rod 5.

[0045] In addition, the bottom of the outer rod body 51 is provided with a connecting hole 511, which is round. The mounting plate 1 is fixedly provided with a connecting crossbar 11 that is adapted to the connecting hole 511. Correspondingly, the connecting crossbar 11 is cylindrical. The outer rod body 51 is slidably sleeved on the connecting crossbar 11 through the connecting hole 511. The outer rod body 51 is threadedly connected with a second locking knob 54 for locking and fixing the sliding of the outer rod body 51. Correspondingly, the outer rod body 51 is provided with a fourth threaded hole communicating with the connecting hole 511. When the second locking knob 54 is tightened, the end of the second locking stud of the second locking knob 54 can abut against the outer surface of the connecting crossbar 11, thereby locking and fixing the support rod 5. When the second locking knob 54 is loosened, the support rod 5 can be easily slid or rotated laterally to adjust the guiding position of the guide wheel 4 to a certain extent.

[0046] The end of the pull rope 21 is fixedly connected to a connecting screw 211, and the fixed end of the tension gauge 3 is fixedly connected to a connecting sleeve 31. The connecting screw 211 is threaded into the connecting sleeve 31. Correspondingly, the connecting sleeve 31 is provided with a second threaded hole that matches the connecting screw 211, thereby facilitating quick assembly and disassembly between the pull rope 21 and the tension gauge 3. The measuring end of the tension gauge 3 is fixedly connected to a connecting buckle 32, and a connecting ring 821 is fixedly connected to the traction bow 82. The connecting buckle 32 can be detachably fastened to the connecting ring 821, thereby facilitating quick assembly and disassembly between the tension gauge 3 and the traction bow 82. Preferably, the connecting buckle 32 is a spring buckle.

[0047] The mounting plate 1 has a plurality of mounting holes 12 evenly distributed along its length. The mounting holes 12 are square in shape. A mounting post 23 is fixedly provided at the center of one side surface of the housing of the spring balancer 2. The mounting post 23 passes through the mounting hole 12 and is threadedly connected to a locking nut 232. A mounting protrusion 231 adapted to the mounting hole 12 is fixedly provided on the outer circumferential surface of the mounting post 23. The length of the mounting protrusion 231 is less than the depth of the mounting hole 12. This facilitates the detachable connection between the spring balancer 2 and the mounting plate 1, and also facilitates the adjustment of the mounting position of the spring balancer 2 on the mounting plate 1 to adapt to different traction positions.

[0048] Two connecting mechanisms 7 are respectively located at the left and right ends of the mounting plate 1. Each connecting mechanism 7 includes a locking block 71, a locking cover 72, and a third locking knob 73. The locking block 71 is fixedly mounted on the mounting plate 1. One end of the locking cover 72 is hinged to the locking block 71, and the other end is detachably connected to the locking block 71 via the third locking knob 73. The locking cover 72 and the locking block 71 together form a locking cavity 74 that matches the vertical rod 811 of the bed frame 81. Correspondingly, the locking cover 72 is provided with a first semi-locking groove. The first half of the locking plate 72 is provided with a second half locking groove. When the locking cover 72 and the locking block 71 are assembled, the first half locking groove and the second half locking groove can be combined to form the locking cavity 74. This makes it easy to lock the mounting plate 1 to the vertical rod 811 of the bed frame 81. In addition, the locking cover 72 is provided with a first locking hole, and the locking block 71 is provided with a first threaded hole. Thus, the third locking stud of the third locking knob 73 can pass through the first locking hole and be threadedly connected to the first threaded hole, so as to facilitate quick assembly and disassembly between the locking cover 72 and the locking block 71.

[0049] The above are merely some specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A traction device for orthopedic nursing, characterized in that: The device includes a mounting plate, a spring balancer, a force gauge, a guide wheel, a support rod, and a traction force adjustment assembly. The mounting plate is detachably connected to the bed frame via a connecting mechanism. The spring balancer is detachably connected to the mounting plate, and its installation position is adjustable along the length of the mounting plate. The support rod is located above the spring balancer and is connected to the mounting plate, with its installation position also adjustable along the length of the mounting plate. The guide wheel is rotatably mounted on the top of the support rod. The end of the pull rope of the spring balancer is detachably connected to the fixed end of the force gauge. The pull rope passes around the guide wheel, and the measuring end of the force gauge is detachably connected to the traction bow. The traction force adjustment assembly is located on the spring balancer and is drivenly connected to its adjustment spindle. The traction force adjustment assembly is used to adjust the traction force applied by the spring balancer to the traction bow through the pull rope.

2. The orthopedic traction device according to claim 1, characterized in that: The traction adjustment assembly includes a drive motor, a controller, a fixed housing, a planetary transmission mechanism, and a manual self-locking drive mechanism. The planetary transmission mechanism has a first motion input end, a second motion input end, and a motion output end. The motion inputs from the first motion input end and the second motion input end can be output individually from the motion output end. The planetary transmission mechanism is rotatably mounted in the inner cavity of the fixed housing. The fixed housing is fixedly connected to the housing of the spring balancer via a connecting plate. The drive motor is driven by the first motion input end of the planetary transmission mechanism. The drive motor is a worm gear reducer stepper motor. The drive motor is fixedly mounted on a motor mount. The motor mount is fixedly mounted on the fixed housing. The manual self-locking drive mechanism is driven by the second motion input end of the planetary transmission mechanism. The motion output end of the planetary transmission mechanism is driven by the adjusting main shaft of the spring balancer.

3. The orthopedic traction device according to claim 2, characterized in that: The planetary transmission mechanism includes a rotating housing, a planet carrier, planet gears, and a sun gear. The rotating housing has a rotating cavity and is located within the inner cavity of the fixed housing, rotatably connected to the fixed housing via a front bearing and a rear bearing. An internal gear ring is coaxially fixed to the inner circumferential surface of the rotating housing, and a worm gear is coaxially fixed to the outer circumferential surface of the rotating housing. The fixed housing has an arc-shaped notch corresponding to the worm gear, which serves as the second motion input end. The planet carrier, planet gears, and sun gear are all located within the rotating cavity. An output shaft is fixed to the center of one end face of the sun gear, and the output shaft is the motion input end. The output shaft is rotatably connected to the rotating housing via a first bearing and extends out of the rotating housing. Multiple planetary shafts are fixedly provided on one side end face of the planetary carrier. Multiple planetary gears are provided, each corresponding to one of the multiple planetary shafts and evenly arranged along the circumference of the sun gear. The planetary gears are rotatably connected to the planetary shafts via a second bearing and mesh with the sun gear and the internal gear ring for transmission. A central shaft is fixedly provided at the center of the other side end face of the planetary carrier. The central shaft is rotatably connected to the rotating housing via a third bearing and extends out of the rotating housing and the fixed housing. The central shaft is the first motion input end.

4. The orthopedic traction device according to claim 3, characterized in that: The manual self-locking drive mechanism includes a worm gear and a drive plate. The worm gear is rotatably mounted on a support base, and the support base is fixedly mounted on the fixed shell. The worm gear meshes with the worm wheel for transmission. The drive plate is fixedly mounted on one end of the worm gear and has a hexagonal drive hole.

5. The orthopedic traction device according to claim 2, characterized in that: The controller includes a control box, a control board, a power supply, a switch button, a forward rotation button, and a reverse rotation button. The drive motor, the power supply, the switch button, the forward rotation button, and the reverse rotation button are all electrically connected to the control board. The control box is fixedly installed on the housing of the spring balancer. The control board and the power supply are both fixedly installed inside the control box. The switch button, the forward rotation button, and the reverse rotation button are all installed on the outer surface of the control box.

6. The orthopedic traction device according to claim 1, characterized in that: The spring balancer has a rope-pulling stop mechanism at its rope outlet. This mechanism includes a limiting rod, a frustum cylinder, steel balls, a compression spring, a limiting sleeve, and an adjusting nut. The frustum cylinder has a frustum cavity extending through both ends. The limiting rod is coaxially mounted with the frustum cylinder and is axially movable within the frustum cavity. One end of the frustum cylinder has a sliding cavity adapted to the limiting rod. One end of the limiting rod extends through the sliding cavity, and a guide assembly is provided between them. The guide assembly includes a guide block and a guide groove. The guide block is fixed to the inner circumferential surface of the sliding cavity of the frustum cylinder. The guide groove is located on the outer circumferential surface of the limiting rod and extends through its upper end. The guide block is adapted to and engaged within the guide groove. The limiting rod has a through-hole extending through both ends. The rope channel includes multiple limiting holes evenly arranged along its circumference and communicating with the rope channel on the outer circumferential surface of the limiting rod. Each limiting hole contains a matching and movable steel ball. A limiting sleeve is located at the large opening end of the frustum-shaped cylinder. The limiting sleeve has a limiting cavity that opens to one end and is compatible with the frustum-shaped cylinder. The limiting sleeve is fitted onto the outside of the frustum-shaped cylinder through the limiting cavity, and the two are fixedly connected. The other end face of the limiting sleeve has a through hole communicating with the limiting cavity and compatible with the limiting rod. The other end of the limiting rod passes through the through hole and is threadedly connected to the adjusting nut. An annular protrusion is fixedly provided on the outer circumferential surface of the limiting rod. A compression spring is fitted onto the limiting rod and abuts against the annular protrusion and the inner bottom surface of the limiting sleeve.

7. The orthopedic traction device according to claim 1, characterized in that: The support rod includes an outer rod body, an inner rod body, a first locking knob, and a second locking knob. The outer rod body has a telescopic cavity adapted to the inner rod body. The inner rod body is sleeved in the telescopic cavity of the outer rod body, and the two are slidably engaged. The guide wheel is disposed on the inner rod body, and the outer circumference of the guide wheel has an annular guide groove. A limiting frame for covering the guide wheel is fixedly disposed at the top of the inner rod body. The first locking knob for locking and fixing the sliding of the inner rod body is threadedly connected to the outer rod body. The bottom of the outer rod body has a connecting hole, which is circular. A connecting crossbar adapted to the connecting hole is fixedly disposed on the mounting plate. The outer rod body is slidably sleeved on the connecting crossbar through the connecting hole. The second locking knob for locking and fixing the sliding of the outer rod body is threadedly connected to the outer rod body.

8. The orthopedic traction device according to claim 1, characterized in that: The end of the pull rope is fixedly connected to a connecting screw, the fixed end of the tension gauge is fixedly connected to a connecting sleeve, the connecting screw is threaded into the connecting sleeve, the measuring end of the tension gauge is fixedly connected to a connecting buckle, and a connecting ring is fixedly connected to the traction bow. The connecting buckle is detachably fastened to the connecting ring.

9. The orthopedic traction device according to claim 1, characterized in that: The mounting plate is provided with a plurality of mounting holes evenly distributed along its length. The mounting holes are square in shape. A mounting post is fixedly provided at the center of one side surface of the housing of the spring balancer. The mounting post passes through the mounting hole and is threaded with a locking nut. A mounting protrusion adapted to the mounting hole is fixedly provided on the outer circumference of the mounting post. The length of the mounting protrusion is less than the depth of the mounting hole.

10. The orthopedic traction device according to claim 1, characterized in that: The connecting mechanism consists of two parts, which are respectively located at the left and right ends of the mounting plate. The connecting mechanism includes a locking block, a locking cover, and a third locking knob. The locking block is fixedly mounted on the mounting plate. One end of the locking cover is hinged to the locking block, and the other end is detachably connected to the locking block through the third locking knob. The locking cover and the locking block together form a locking cavity that is adapted to the vertical rod of the bed frame.

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