An arc-shaped device for adjusting traction

Abstract

This application relates to an arc-shaped traction device, mounted on one side of a traction bed, belonging to the field of medical devices. It includes an arc-shaped slide rail and a hollow traction trolley. Two arc-shaped slide rails are provided, bending towards the side closest to the traction bed. A toothed groove is formed on the other side of the arc-shaped slide rail along its length. The traction trolley includes a traction shaft and a guide roller assembly. The traction trolley is configured to be mounted on the arc-shaped slide rail via the guide roller assembly and to reciprocate along the arc-shaped slide rail. The traction shaft is rotatably mounted inside the traction trolley via an elastic winding member. Arc-shaped locking teeth are coaxially mounted on the traction shaft. The traction shaft is configured to engage the arc-shaped locking teeth with the toothed groove via the elastic winding member to suspend the traction trolley; or, when the traction trolley moves to the end of its stroke, the elastic winding member further contracts to buffer the impact on the traction trolley. This improves the energy efficiency of the device while also enhancing its safety in the event of emergencies.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an arc-shaped device for adjusting traction. Background Technology

[0002] In existing technologies, the most basic principle of traction therapy is to widen the intervertebral space inside the spine through longitudinal traction, and to create negative pressure fluid inside the intervertebral disc and joint capsule, which flows in from the outside to the inside, helping the spine to return to its original reasonable curvature, thereby relieving the nerve root compression and irritation caused by the narrowing of the intervertebral structure.

[0003] Based on the existing "one garden, one theory, two theories" spinal biomechanics theory, and following the three major treatment principles (muscle relaxation, curvature adjustment, and exercise) and the four major therapies (spinal alignment and curvature adjustment, acupuncture and massage, internal and external medication, and functional exercises), the four-dimensional traction and curvature adjustment method is used to restore or improve the patient's spine to its original anatomical and physiological curvature, thereby achieving the goal of rehabilitation treatment.

[0004] Existing medical traction equipment requires medical staff to manually adjust the traction angle according to the position to be tractioned. The aforementioned traction bed uses a motor to control traction and maintain the angle. When maintaining the angle, it usually relies on the motor to continuously output torque to overcome gravity, resulting in large power consumption and insufficient energy saving. In addition, if the rope breaks, it can easily cause secondary injury to the patient. Summary of the Invention

[0005] This application provides an arc-shaped device for adjusting traction, which can solve the problems of insufficient energy saving and low safety of existing electric traction equipment when traction and maintaining angle.

[0006] The technical solution of this application is as follows: an arc-shaped device for adjusting traction, assembled on one side of a traction bed, comprising: The curved slide rail has two sections, which are bent towards the side closer to the traction bed. The other side of the curved slide rail has a toothed groove along its length. The traction trolley is hollow inside, and includes a traction shaft and a guide roller assembly inside. The traction trolley is configured to be mounted on an arc-shaped slide rail via the guide roller assembly and to reciprocate along the arc-shaped slide rail. The traction shaft is rotatably mounted inside the traction trolley via an elastic winding member. A traction rope is wound around the outside of the traction shaft, and one end of the traction rope is connected to the drive shaft of the drive motor. The traction shaft is coaxially fitted with arc-shaped locking teeth, and the traction shaft is configured to engage the arc-shaped locking teeth with the tooth grooves via an elastic winding member, thereby suspending the traction trolley; and When the traction trolley moves to the end of its stroke, the elastic retractor is further contracted to cushion the impact on the traction trolley.

[0007] By adopting the above scheme, and by setting up a traction rope and an elastic winding component, when the motor tightens the traction rope, the rope tension overcomes the torque of the elastic winding component, which can drive the traction shaft to rotate to the first angle, so that the arc-shaped locking teeth separate from the tooth groove on the arc-shaped slide rail. At this time, the traction trolley can move smoothly. When the motor stops or the traction rope is loosened, the elastic winding component resets and drives the traction shaft to reverse, so that the arc-shaped locking teeth automatically engage with the tooth groove. The mechanical structure is used to lock and hover the trolley, eliminating the need for the motor to continuously output power, thus reducing energy consumption. In addition, even if the traction rope breaks, the arc-shaped locking teeth can automatically engage with the tooth groove, thereby improving the safety of the device in the face of emergencies. When the traction trolley is blocked at the end of its stroke due to inertia or misoperation, the impact force can cause the traction rope to continue pulling the traction shaft to rotate to a larger angle, thereby protecting the motor shaft, gearbox and traction rope from damage and further improving the safety of the device.

[0008] In one embodiment of this application, the guide roller assembly includes: The fixed wheel set includes two sets, which are spaced apart along the width direction of the traction trolley. Each set of the fixed wheel set includes at least two fixed wheels, which are arranged along the length direction of the traction trolley. The two sets of fixed wheel sets are arranged one-to-one on one side surface of the two arc-shaped slide rails. The movable wheel set has two sets, each corresponding to a fixed wheel set. The traction trolley has arc-shaped grooves on both sides. The movable wheel set is slidably assembled in the arc-shaped grooves and is located on the lower surface of the other side of the arc-shaped slide rail. An elastic telescopic member is provided between the movable wheel set and the traction trolley. The elastic telescopic member is used to control the movable wheel set to move closer to or away from the fixed wheel set.

[0009] By adopting the above solution, and by setting an elastic telescopic component inside the movable wheel assembly, the movable wheel assembly maintains an upward clamping force under the action of the elastic telescopic component. Together with the fixed wheel assembly, it clamps the arc-shaped slide rail in the middle. This allows the entire traction trolley to automatically compensate for the curvature error generated during the processing and bending of the arc-shaped slide rail or the wear gap after long-term use when it moves. This ensures that the traction trolley stays close to the slide rail throughout the entire operation, preventing shaking caused by excessive gaps and avoiding jamming caused by track deformation, thus ensuring stable operation.

[0010] In one embodiment of this application, the fixed wheel set further includes a fixed wheel axle, one end of which is rotatably mounted on the traction trolley, and the other end extends into the traction trolley. The fixed wheel is coaxially fixedly mounted on the other end of the fixed wheel axle.

[0011] By adopting the above scheme, the arc-shaped concave surface of the fixed wheel is matched with the tubular arc-shaped slide rail in shape, which not only increases the wheel-rail contact area to improve the load-bearing capacity, but also restricts the degree of freedom of the traction trolley in the horizontal left and right directions, playing the role of track guidance and preventing the trolley from tilting or derailing during operation.

[0012] In one embodiment of this application, the movable wheel set includes: The movable wheel axle has one end passing through the arc-shaped slide groove and sliding along the length of the arc-shaped slide groove, and the other end extending into the interior of the traction trolley; The movable wheel is located inside the traction trolley and is coaxially connected and fixed to the other end of the movable wheel axle. Both the fixed wheel and the movable wheel have arc-shaped recesses on their exteriors that are adapted to the arc-shaped slide rail. A swing arm, one end of which is rotatably mounted on the outer wall of the traction trolley, and the other end of which is fixedly mounted with the elastic telescopic component between the traction trolley and the traction trolley. One end of the movable wheel axle is rotatably connected to the swing arm.

[0013] By adopting the above scheme, the linear thrust of the elastic telescopic component is converted into the radial clamping force of the movable wheel pair on the slide rail, so that the movable wheel set can adjust its position more smoothly when passing through areas with large changes in the curvature of the slide rail, thereby avoiding the situation where the traction trolley gets stuck on the arc-shaped slide rail.

[0014] In one embodiment of this application, an arc-shaped connecting plate is further included. The arc-shaped connecting plate is disposed between the two arc-shaped slide rails. The two sides of the arc-shaped connecting plate are respectively connected and fixed to the two arc-shaped slide rails and extend along the length direction of the arc-shaped slide rails. The upper and lower surfaces of the arc-shaped connecting plate are each provided with a plurality of fixed pulleys spaced apart along its own length. The upper surface of the other side of the arc-shaped connecting plate is provided with a return hook assembly, which is located at the end of the stroke of the traction trolley and is used to assist the traction trolley in resetting. The traction trolley is provided with a traction fixing seat on one side for fixing the traction belt. The traction rope passes around multiple fixed pulleys and is connected to the drive shaft of the drive motor.

[0015] By adopting the above solution, the fixed pulley group set along the arc-shaped connecting plate can guide the traction rope to conform to the arc-shaped trajectory to transmit power, ensuring that the direction of the traction force is always approximately along the tangent of the slide rail, reducing the loss of component force. At the same time, the return hook assembly can drive the traction trolley to reset when it moves to the end of the stroke, thus solving the problem that the traction trolley is difficult to start and slide down by its own weight at the end of the stroke, that is, at the top of the arc-shaped slide rail.

[0016] In one embodiment of this application, the hook assembly includes: A fixed seat is fixedly mounted on the upper surface of the other side of the arc-shaped connecting plate. The fixed seat has a placement slot inside and a hook inside the placement slot. One end of the hook extends to the outside of the fixed seat for hanging on the traction shaft. The coil spring is located inside the fixed base, which has a placement cavity on one side of the placement slot. One end of the coil spring is fixedly connected to the inner wall of the placement cavity, and the other end is fixedly connected to the hook.

[0017] By adopting the above scheme, during the process of the traction trolley moving to the end of the stroke, the traction shaft is engaged in the hook, and the hook will continue to move along the arc-shaped slide rail with the traction trolley. When it is necessary to reset and descend, the coil spring releases the tension, providing an initial downward thrust to the traction trolley, helping the trolley overcome static friction and providing the initial downward speed, thus realizing segmented power assistance.

[0018] In one embodiment of this application, the elastic winding member includes a fixed cover. Two fixed covers are provided and are respectively fixedly mounted on the inner walls of the two sides of the traction trolley. The two ends of the traction shaft extend into the interior of the fixed cover and are rotatably connected to the inner wall of the fixed cover. A traction coil spring is provided between the traction shaft and the fixed cover. The two ends of the traction coil spring are respectively connected and fixed to the inner wall of the fixed cover and the traction shaft.

[0019] By adopting the above solution, the traction spring is integrated into the internal space of the traction shaft and the fixed cover, allowing the traction shaft to rotate with the traction rope, thereby driving the traction spring to deflect. When the traction spring deflects, it can accumulate elastic potential energy, which facilitates the engagement of the arc-shaped locking teeth and the tooth groove under the drive of the spring in case of accidents or when the drive motor needs to be shut down. This improves the energy efficiency of the device and also enhances its safety in the face of emergencies. In addition, when the traction rope drives the traction trolley to the end of its stroke, the spring that has not been fully wound to its limit can undergo further radial elastic deformation under the action of traction force, thereby further improving the device's buffering capacity.

[0020] In one embodiment of this application, a limiting ring is provided on the traction shaft, and an annular gap is provided in the middle of the limiting ring. The traction rope is disposed in the annular gap and is connected and fixed to the traction shaft. Two arc-shaped locking teeth are provided, and the two arc-shaped locking teeth are respectively located on both sides of the limiting ring, forming an engagement gap between them and the limiting ring for the hook to be placed.

[0021] By adopting the above solution and setting a limiting ring, the traction rope can be restrained in the middle to prevent the rope from getting tangled. At the same time, the arc-shaped locking teeth on both sides can form a locking gap with the limiting ring, so that the hook of the return hook assembly can smoothly extend into the gap to hook the traction shaft without mechanically interfering with the arc-shaped locking teeth or the traction rope. This ensures that the locking function and the return hook auxiliary function can work independently or in combination.

[0022] In one embodiment of this application, a limiting seat is further included, the limiting seat comprising: A limiting body is fixedly assembled onto the arc-shaped connecting plate; A flexible pad is fitted onto the side of the limiting body near the traction trolley.

[0023] By adopting the above solution and setting up the flexible pad, it can play the first energy absorption buffer role when the trolley accidentally hits the limit seat, reducing the noise or structural deformation caused by hard collision, and improving the quietness and durability of the equipment operation.

[0024] In one embodiment of this application, a fixing base is further included, the fixing base comprising: The base body has two arc-shaped slide rails fixedly connected to both sides of its upper end. A counterweight groove is assembled on one side of the base body, and a counterweight block is provided inside the counterweight groove.

[0025] By adopting the above solution and adding a counterweight groove at the bottom to increase the weight of the chassis, the center of gravity of the whole machine is effectively reduced, preventing the device from tipping over when subjected to high traction loads or unexpected lateral forces, thus ensuring safety during the medical rehabilitation process.

[0026] In summary, this application includes at least one of the following beneficial technical effects: by setting up a traction rope and an elastic winding component, the working state of the traction trolley is automatically switched: when driven by the motor, the tension overcomes the torque of the elastic winding component to automatically unlock, ensuring smooth movement; when the motor stops or relaxes, the torque is used to reset and achieve mechanical locking, thereby realizing the function of hovering at any angle without the need for continuous motor output power; at the same time, in the event of a sudden rope breakage, the torque can also make the arc-shaped locking teeth and the tooth grooves engage with each other to lock the traction trolley, improving the safety of the medical equipment.

[0027] By setting up a rotatable traction shaft and a traction rope wound around the traction shaft, when the traction trolley is rigidly blocked at the end of its stroke due to inertia or misoperation, the huge impact force is not directly transmitted to the traction rope. Instead, the traction rope is forced to pull the traction shaft to rotate to a larger angle, which in turn further contracts the elastic winding component to reduce the impact on the traction rope. This effectively protects the motor shaft, gearbox, and traction rope from rigid impact damage and extends the service life of the device.

[0028] By setting up a swing arm that can be connected to the elastic telescopic component, the elastic force of the elastic telescopic component is converted into a radial clamping force on the movable wheel pair of the arc-shaped slide rail. This allows the guide roller assembly to automatically compensate for the curvature error or long-term wear gap caused by the bending process of the arc-shaped slide rail. This not only reduces the shaking caused by excessive gaps, but also avoids jamming caused by local deformation of the track, ensuring the stability of the traction trolley when moving. Attached Figure Description

[0029] Figure 1 This is a perspective view of an arc-shaped device for adjusting traction provided in the embodiments of this application; Figure 2 This is a plan view of the assembly of an arc-shaped device for bending traction with a traction bed provided in the embodiments of this application; Figure 3 This is a perspective view of a traction trolley using an arc-shaped device for adjusting traction, as provided in an embodiment of this application. Figure 4 This is a cross-sectional schematic diagram of an elastic winding component of an arc-shaped device for adjusting traction provided in an embodiment of this application; Figure 5 This is a perspective view of a return hook assembly of an arc-shaped device for adjusting traction provided in an embodiment of this application; Figure 6 This is a planar sectional view of a curved traction device return hook assembly provided in an embodiment of this application; Figure 7 This is a cross-sectional schematic diagram of a curved traction device with a fixed wheel set on a curved slide rail, as provided in the embodiments of this application. Figure 8 This is a planar sectional view of an arc-shaped device for adjusting traction provided in this application embodiment when the arc-shaped locking teeth and the tooth grooves are engaged with each other; Figure 9 This is a planar cross-sectional view of the arc-shaped chuck teeth and tooth grooves of an arc-shaped traction device sliding trolley provided in the embodiments of this application when it is pulled down. Figure 10 This is a planar sectional view of the arc-shaped traction device provided in this application embodiment, showing the arc-shaped traction teeth and tooth grooves when the traction trolley is being pulled upwards. Figure 11This is a planar cross-sectional view of the arc-shaped traction device provided in this application embodiment, which moves the trolley to the end of its stroke and impacts the limiting seat, showing the arc-shaped locking teeth and tooth grooves.

[0030] Explanation of reference numerals in the attached drawings: 1. Arc-shaped slide rail; 11. Tooth groove; 2. Traction trolley; 21. Traction shaft; 211. Arc-shaped retaining tooth; 212. Limiting ring; 2121. Annular gap; 22. Guide roller assembly; 221. Fixed wheel assembly; 2211. Fixed wheel; 2212. Fixed wheel axle; 2222. Movable wheel assembly; 2221. Movable wheel axle; 2222. Movable wheel; 2223. Swing arm; 23. Elastic winding component; 2 31. Fixed cover; 232. Traction coil spring; 24. Traction rope; 25. Arc-shaped slide groove; 26. Elastic telescopic component; 27. Traction fixed seat; 3. Arc-shaped connecting plate; 31. Fixed pulley; 32. Return hook assembly; 321. Fixed seat; 3211. Placement slot; 322. Hook; 323. Coil spring; 4. Limiting seat; 41. Limiting body; 42. Flexible pad; 5. Fixed base; 51. Base body; 52. Counterweight groove. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-11 The curved traction device provided in this application is assembled on one side of the traction bed and includes: a curved slide rail 1 and a traction trolley 2.

[0032] Please see Figure 1 , Figure 2 and Figure 3 Two arc-shaped slide rails 1 are provided, and they are bent towards the side closer to the traction bed. The other side of the arc-shaped slide rail 1 has a toothed groove 11 along its length. The traction trolley 2 includes a traction shaft 21 and a guide roller assembly 22. The traction trolley 2 is hollow inside. The traction trolley 2 is configured to be mounted on the arc-shaped slide rail 1 via the guide roller assembly 22 and to reciprocate along the arc-shaped slide rail 1. The traction shaft 21 is rotatably mounted inside the traction trolley 2 via an elastic winding member 23. A traction rope 24 is wound around the outside of the traction shaft 21. One end of the traction rope 24 is connected to the drive shaft of the drive motor. The upper coaxial sleeve is equipped with an arc-shaped locking tooth 211. The traction shaft 21 is configured to drive the arc-shaped locking tooth 211 to engage with the tooth groove 11 through the elastic winding member 23, so as to suspend the traction trolley 2; or when the traction trolley 2 moves to the end of the stroke, the elastic winding member 23 is further contracted to buffer the impact on the traction trolley 2. By setting the traction rope 24 and the elastic winding member 23, the traction force of the traction rope 24 is controlled, thereby controlling the traction trolley 2 to achieve the ability to suspend, move and self-lock on the arc-shaped slide rail 1 without power input, which improves the ease of use and safety of the device.

[0033] Please see Figure 3A limiting ring 212 is provided on the traction shaft 21. An annular gap 2121 is provided in the middle of the limiting ring 212. The traction rope 24 is placed in the annular gap 2121 and is connected and fixed to the traction shaft 21. Two arc-shaped locking teeth 211 are provided. The two arc-shaped locking teeth 211 are located on both sides of the limiting ring 212 respectively, and a locking gap is formed between them and the limiting ring 212 for the hook 322 to be placed. By setting the locking gap, the hook 322 of the hook assembly 32 can smoothly extend into the gap to hook the traction shaft 21 without mechanically interfering with the arc-shaped locking teeth 211 or the traction rope 24.

[0034] Please see Figure 4 The elastic winding component 23 includes a fixed cover 231. Two fixed covers 231 are provided and are respectively fixedly mounted on the inner walls of the two sides of the traction trolley 2. The two ends of the traction shaft 21 extend into the interior of the fixed cover 231 and are rotatably connected to the inner wall of the fixed cover 231. A traction coil spring 232 is provided between the traction shaft 21 and the fixed cover 231. The two ends of the traction coil spring 232 are respectively connected and fixed to the inner wall of the fixed cover 231 and the traction shaft 21. By providing the traction coil spring 232, the traction shaft 21 can rotate with the traction of the traction rope 24, causing the traction coil spring 232 to deflect and accumulate elastic potential energy. This makes it easy to control the arc-shaped locking teeth 211 and the tooth groove 11 to engage with each other under the drive of the traction coil spring 232 in case of an accident or when the drive motor needs to be shut down, thereby improving the energy efficiency of the device.

[0035] Please see Figure 1 It also includes an arc-shaped connecting plate 3, which is set between two arc-shaped slide rails 1. The two sides of the arc-shaped connecting plate 3 are respectively connected and fixed to the two arc-shaped slide rails 1 and extend along the length direction of the arc-shaped slide rails 1. Multiple fixed pulleys 31 are arranged at intervals along their own length direction on the upper and lower surfaces of the arc-shaped connecting plate 3. A return hook assembly 32 is set on the upper surface of the other side of the arc-shaped connecting plate 3. The return hook assembly 32 is set at the end of the stroke of the traction trolley 2 and is used to assist the traction trolley 2 in resetting. A traction fixing seat 27 for fixing the traction belt is provided on one side of the traction trolley 2. The traction rope 24 passes around multiple fixed pulleys 31 and is connected to the drive shaft of the drive motor. By setting the return hook assembly 32, the device can drive the traction trolley 2 to reset when it moves to the end of the stroke, so as to solve the problem that the trolley 2 is difficult to start and slide down by its own gravity at the end of the stroke.

[0036] Please see Figure 3 and Figure 7The guide roller assembly 22 includes: a fixed wheel set 221 and a movable wheel set 222. Two sets of fixed wheel sets 221 are provided and spaced apart along the width direction of the traction trolley 2. Each set of fixed wheel sets 221 includes at least two fixed wheels 2211 and is provided along the length direction of the traction trolley 2. The two sets of fixed wheel sets 221 are correspondingly arranged on one side surface of the two arc-shaped slide rails 1. The fixed wheel set 221 also includes a fixed wheel axle 2212, one end of which is rotatably mounted on the traction trolley 2. The other end extends into the traction trolley 2. The fixed wheel 2211 is coaxially fixedly mounted on the other end of the fixed wheel axle 2212. Both the fixed wheel 2211 and the movable wheel 2222 have arc-shaped recesses on their exteriors that are compatible with the arc-shaped slide rail 1. By using the arc-shaped recesses on the surface of the fixed wheel 2211 to match the shape of the tubular arc-shaped slide rail 1, the wheel-rail contact area is increased to improve the load-bearing capacity. At the same time, the degree of freedom of the traction trolley 2 in the horizontal left and right directions is restricted, which plays the role of track guidance.

[0037] Please continue reading. Figure 3 Two sets of movable wheel sets 222 are provided, each corresponding to a fixed wheel set 221. Arc-shaped grooves 25 are provided on both sides of the traction trolley 2. The movable wheel sets 222 are slidably fitted into the arc-shaped grooves 25 and located on the lower surface of the other side of the arc-shaped slide rail 1. An elastic telescopic member 26 is provided between the movable wheel sets 222 and the traction trolley 2. The elastic telescopic member 26 is used to control the movable wheel sets 222 to move closer to or away from the fixed wheel sets 221. The movable wheel set 222 includes: a movable wheel axle 2221, a movable wheel 2222, and a swing arm 2223. One end of the movable wheel axle 2221 passes through the arc-shaped groove 25 and slides along the length of the arc-shaped groove 25, while the other end extends into the interior of the traction trolley 2. The movable wheel 2222 is located on... Inside the traction trolley 2, and coaxially connected and fixed to the other end of the movable wheel axle 2221, one end of the swing arm 2223 is rotatably mounted on the outer wall of the traction trolley 2, and the other end is fixedly mounted with an elastic telescopic component 26 between the traction trolley 2 and the traction trolley 2. One end of the movable wheel axle 2221 is rotatably connected to the swing arm 2223. By setting the elastic telescopic component 26 inside the movable wheel assembly 222, the movable wheel assembly 222 always maintains an upward pressing force under the action of the elastic telescopic component 26. Together with the fixed wheel assembly 221, the arc-shaped slide rail 1 is clamped in the middle, so that the entire traction trolley 2 can automatically compensate for the curvature error generated during the processing and bending of the arc-shaped slide rail 1 or the wear gap after long-term use when it moves, thus ensuring the smoothness of operation.

[0038] Please see Figure 5 and Figure 6The return hook assembly 32 includes a fixed seat 321 and a coil spring 323. The fixed seat 321 is fixedly mounted on the upper surface of the other side of the arc-shaped connecting plate 3. The fixed seat 321 has a placement slot 3211 inside, and a hook 322 is provided inside the placement slot 3211. One end of the hook 322 extends to the outside of the fixed seat 321 for hanging on the traction shaft 21. The fixed seat 321 has a placement cavity on one side of the placement slot 3211. The coil spring 323 is located inside the placement cavity. One end of the coil spring 323 is connected and fixed to the inner wall of the placement cavity, and the other end is connected and fixed to the hook 322. When it is necessary to reset and descend, the coil spring 323 releases the tension, providing an initial downward thrust to the traction trolley 2, helping the trolley overcome static friction and providing an initial downward speed, thus realizing segmented power assistance.

[0039] Please see Figure 1 It also includes a limiting seat 4, which includes a limiting body 41 and a flexible pad 42. The limiting body 41 is fixedly mounted on the arc-shaped connecting plate 3, and the flexible pad 42 is mounted on the side of the limiting body 41 near the traction trolley 2. By setting the flexible pad 42, the noise caused by hard collision or structural deformation is reduced, and the quietness and durability of the equipment operation are improved.

[0040] Please continue reading. Figure 1 It also includes a fixed base 5, which includes a base body 51 and a counterweight groove 52. Two arc-shaped slide rails 1 are fixedly connected to the upper two sides of the base body 51. The counterweight groove 52 is assembled on one side of the base body 51. The counterweight groove 52 is equipped with a counterweight block inside. By setting the counterweight groove 52 at the bottom, the weight of the chassis is increased, which effectively reduces the center of gravity of the whole machine and prevents the device from tipping over when subjected to high load or unexpected lateral force.

[0041] In summary, please refer to Figure 8 When the traction trolley 2 moves to the predetermined treatment position and needs to hover, or when the motor stops outputting / relaxing the traction rope 24, the tension on the traction rope 24 decreases or disappears instantly. At this time, the elastic potential energy stored in the elastic winding member 23 is released, generating a reset torque, which drives the traction shaft 21 to rotate in the opposite direction. This action causes the arc-shaped locking tooth 211 to be embedded in the corresponding arc-shaped slide rail 1 tooth groove 11 under the action of the elastic winding member 23, forming a mechanical interlock. At this time, the traction trolley 2 enters the mechanical locking state, and uses the structural self-locking to bear the load. There is no need for the motor to continuously output torque to maintain the position, thus realizing zero-power hovering and rope breakage anti-fall protection. Please see Figure 9When the traction trolley 2 is at the end of its stroke and needs to reset and descend, the motor releases the traction rope 24. Since the tangential component of gravity is small at this point, the coil spring 323 in the hook assembly 32 releases tension, providing initial thrust to the traction trolley 2 and causing it to leave the stationary state. During the descent, the traction rope 24 is controlled to maintain a first tension, which is sufficient to overcome the elastic winding member 23 to keep the teeth slightly separated, but less than the downward component of gravity, so that the traction trolley 2 is controlled to descend slowly under the action of gravity. In the descent mode, the drive motor outputs to keep the traction rope 24 under the first tension. The torque generated by this first tension is greater than the reset torque of the elastic winding member 23, but the first tension is less than the tangential component of the gravity of the traction trolley 2 along the track, thereby realizing the slow descent by gravity. Please see Figure 10 When the drive motor starts and winds up the traction rope 24, the traction rope 24 generates tension acting on the traction shaft 21 inside the traction trolley 2. At this time, the tension of the traction rope 24 gradually increases and overcomes the pre-tightening torque of the elastic winding member 23, driving the traction shaft 21 to rotate. As the traction shaft 21 rotates to the first angle, the arc-shaped locking teeth 211 fixed on the shaft disengages from the tooth grooves 11 on the arc-shaped slide rail 1. At this time, the traction trolley 2 is in an unlocked floating state. Under the continuous pull of the traction rope 24, it overcomes its own weight and the frictional resistance of the guide roller assembly 22, and moves smoothly upward along the arc-shaped slide rail 1 to perform traction treatment on the patient. Additionally, please see Figure 11 If the traction trolley 2 rushes to the end of its stroke and hits the limit seat 4 due to inertia or misoperation, the displacement of the traction trolley 2 is instantly restricted, but the drive system may not have completely unloaded the force. At this time, the increased traction tension will force the traction shaft 21 to continue to overcome the resistance of the elastic winding member 23 and rotate to a second angle that is larger than the first angle. During this process, the elastic winding member 23 is further wound and compressed, thereby providing flexible buffer protection for the motor shaft, gearbox and traction rope 24 and avoiding hard damage.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An arc-shaped device for adjusting traction, assembled on one side of a traction bed, characterized in that, include: Arc-shaped slide rail (1), the arc-shaped slide rail (1) is provided with two rails and bends towards the side closer to the traction bed, and the other side of the arc-shaped slide rail (1) is provided with a toothed groove (11) along its own length direction; The traction trolley (2) is hollow inside. The traction trolley (2) includes a traction shaft (21) and a guide roller assembly (22). The traction trolley (2) is configured to be mounted on an arc-shaped slide rail (1) via the guide roller assembly (22) and to reciprocate along the arc-shaped slide rail (1). The traction shaft (21) is rotatably mounted inside the traction trolley (2) via an elastic winding member (23). A traction rope (24) is wound around the outside of the traction shaft (21). One end of the traction rope (24) is connected to the drive shaft of the drive motor. The traction shaft (21) is coaxially fitted with an arc-shaped locking tooth (211), and the traction shaft (21) is configured to drive the arc-shaped locking tooth (211) to engage with the tooth groove (11) through an elastic winding member (23) to suspend the traction trolley (2); and When the traction trolley (2) moves to the end of its stroke, the elastic winding member (23) is further contracted to cushion the impact on the traction trolley (2).

2. The arc-shaped device for adjusting traction according to claim 1, characterized in that, The guide roller assembly (22) includes: Fixed wheel sets (221) are provided in two sets and are spaced apart along the width direction of the traction trolley (2). Each set of fixed wheel sets (221) includes at least two fixed wheels (2211) and is arranged along the length direction of the traction trolley (2). The two sets of fixed wheel sets (221) are arranged one-to-one on one side surface of the two arc-shaped slide rails (1). The movable wheel set (222) has two sets, which correspond one-to-one with the fixed wheel set (221). The traction trolley (2) has arc-shaped grooves (25) on both sides. The movable wheel set (222) is slidably assembled in the arc-shaped grooves (25) and located on the lower surface of the other side of the arc-shaped slide rail (1). An elastic telescopic member (26) is provided between the movable wheel set (222) and the traction trolley (2). The elastic telescopic member (26) is used to control the movable wheel set (222) to move closer to or away from the fixed wheel set (221).

3. The arc-shaped device for adjusting traction according to claim 2, characterized in that: The fixed wheel assembly (221) also includes a fixed wheel axle (2212), one end of which is rotatably mounted on the traction trolley (2), and the other end extends into the traction trolley (2). The fixed wheel (2211) is coaxially fixedly mounted on the other end of the fixed wheel axle (2212).

4. The arc-shaped device for adjusting traction according to claim 2, characterized in that, The movable wheel assembly (222) includes: Movable wheel axle (2221), one end of which passes through the arc-shaped slide groove (25) and slides along the length of the arc-shaped slide groove (25), and the other end extends into the interior of the traction trolley (2); Movable wheel (2222), the movable wheel (2222) is set inside the traction trolley (2) and is coaxially connected and fixed to the other end of the movable wheel shaft (2221). The fixed wheel (2211) and the movable wheel (2222) are both provided with arc-shaped recesses that are adapted to the arc-shaped slide rail (1). A swing arm (2223) is rotatably mounted on the outer wall of the traction trolley (2) at one end, and the elastic telescopic member (26) is fixedly mounted between the other end and the traction trolley (2). One end of the movable wheel axle (2221) is rotatably connected to the swing arm (2223).

5. The arc-shaped device for adjusting traction according to claim 4, characterized in that: It also includes an arc-shaped connecting plate (3), which is disposed between the two arc-shaped slide rails (1). The two sides of the arc-shaped connecting plate (3) are respectively connected and fixed to the two arc-shaped slide rails (1) and extend along the length direction of the arc-shaped slide rails (1). The upper and lower surfaces of the arc-shaped connecting plate (3) are provided with a plurality of fixed pulleys (31) spaced apart along their own length direction. The upper surface of the other side of the arc-shaped connecting plate (3) is provided with a return hook assembly (32). The return hook assembly (32) is located at the end of the stroke of the traction trolley (2) to assist the traction trolley (2) in resetting. The traction trolley (2) has a traction fixing seat (27) on one side for fixing the traction belt. The traction rope (24) passes around multiple fixed pulleys (31) and is connected to the drive shaft of the drive motor.

6. The arc-shaped device for adjusting traction according to claim 5, characterized in that, The hook assembly (32) includes: A fixed seat (321) is fixedly mounted on the upper surface of the other side of the arc-shaped connecting plate (3). The fixed seat (321) has a placement slot (3211) inside. The placement slot (3211) has a hook (322) inside. One end of the hook (322) extends to the outside of the fixed seat (321) for hanging on the traction shaft (21). The coil spring (323) is provided inside the fixed base (321) on one side of the placement slot (3211). The coil spring (323) is located inside the placement cavity. One end of the coil spring (323) is connected and fixed to the inner wall of the placement cavity, and the other end is connected and fixed to the hook (322).

7. The arc-shaped device for adjusting traction according to claim 6, characterized in that, The elastic winding component (23) includes: a fixed cover (231), two fixed covers (231) are provided and respectively fixedly mounted on the inner walls of the two sides of the traction trolley (2), the two ends of the traction shaft (21) extend into the interior of the fixed cover (231) and are rotatably connected to the inner wall of the fixed cover (231), and a traction coil spring (232) is provided between the traction shaft (21) and the fixed cover (231), the two ends of the traction coil spring (232) are respectively connected and fixed to the inner wall of the fixed cover (231) and the traction shaft (21).

8. The arc-shaped device for adjusting traction according to claim 7, characterized in that: The traction shaft (21) is provided with a limiting ring (212), and an annular gap (2121) is provided in the middle of the limiting ring (212). The traction rope (24) is placed in the annular gap (2121) and is connected and fixed to the traction shaft (21). Two arc-shaped locking teeth (211) are provided. The two arc-shaped locking teeth (211) are located on both sides of the limiting ring (212) respectively, and form an engagement gap with the limiting ring (212) for the hook (322) to be placed.

9. The arc-shaped device for adjusting traction according to claim 5, characterized in that, It also includes a limiting seat (4), the limiting seat (4) comprising: A limiting body (41) is fixedly assembled on the arc-shaped connecting plate (3); A flexible pad (42) is fitted onto the side of the limiting body (41) near the traction trolley (2).

10. The arc-shaped device for adjusting traction according to claim 1, characterized in that, It also includes a fixing base (5), the fixing base (5) comprising: The base body (51) has two arc-shaped slide rails (1) fixedly connected to the upper two sides of the base body (51); The counterweight groove (52) is assembled on one side of the base body (51), and a counterweight block is provided inside the counterweight groove (52).

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