An intelligent traction bed with automatic traction adjustment

Abstract

The present invention proposes an intelligent traction bed that automatically adjusts traction force, which relates to the technical field of medical traction beds. The bed includes a traction bed base, a fixed bed frame, and a floating bed frame. The floating bed frame is provided with a sliding bed frame and pads for corresponding body parts. The fixed bed frame and the floating bed frame are elastically connected by a first spring. The floating bed frame is pressed down by the patient's weight. The driving gear and the driving rack engage to drive the driving shaft to rotate. The driving screw is rotated through the one-way transmission of the first and second ratchet discs, so that the sliding bed frame slides to pull and stretch the spine. At the same time, the friction between the friction disc and the force adjustment wheel is adjusted by a force adjustment handwheel, a speed reducer, a friction adjustment screw, etc. to control the traction force. Compared with traditional traction beds that rely on pressure sensors for overload protection, the present invention avoids the risk of excessive traction force at the source, ensures treatment safety, and provides accurate and safe spinal traction treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of medical traction beds, in particular to an intelligent traction bed that automatically adjusts traction force. Background Art

[0002] A traction bed is a medical device used to assist in the treatment of spinal diseases such as lumbar disc herniation and cervical spondylosis. It helps adjust the position of spinal joints, reduce intervertebral disc pressure, relieve pain, and improve joint mobility by stretching and pulling the patient's body. Its working principle is mainly based on the traction principle in mechanics. Through a specific device, tension is applied to the patient's body to increase the intervertebral space, thereby reducing pressure on the nerves. During the treatment process using a traction bed, it is very important to control the traction force. Appropriate traction force can effectively improve the patient's symptoms and promote recovery; if the force is too small, the expected treatment effect cannot be achieved; if the force is too large, it may cause secondary injuries such as muscle strain and joint injury, and even aggravate the condition.

[0003] At present, the common traction beds on the market mainly monitor the force during the traction process through pressure sensors, and realize overload protection in combination with preset safety thresholds. When the sensor detects that the traction force exceeds the set value, the control system will automatically stop traction or reduce the force. For example, some electric traction beds have built-in high-precision pressure sensors to collect traction force data in real time and compare it with the preset safety parameters. Once an abnormality occurs, the protection mechanism is immediately triggered. However, this protection method based on pressure sensors has certain limitations. On the one hand, the accuracy of the pressure sensor itself is easily affected by environmental factors. For example, changes in temperature and humidity may cause measurement errors, affecting the accuracy of traction force control; on the other hand, this "after-the-fact protection" mechanism intervenes only after the traction force exceeds the safety range. It cannot avoid the risks caused by excessive force from the root, and there are certain safety hazards. It is difficult to meet the needs of precise control of traction force. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent traction bed that automatically adjusts traction force, so as to solve the problem that the traction force control of traditional traction beds mentioned in the above background is dangerous.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is an intelligent traction bed with automatic traction force adjustment, comprising: a traction bed base, a fixed bed frame rotatably connected to the traction bed base, a floating bed frame elastically connected to the fixed bed frame, the elastic connection structure enables the floating bed frame to float up and down relative to the fixed bed frame, and provides a basis for generating traction force through the patient's weight in the future; a torso pad is fixedly connected to the fixed bed frame for supporting the patient's torso, a sliding bed frame is slidably connected to the floating bed frame, a buttocks pad is fixedly connected to the sliding bed frame for supporting the patient's buttocks, one end of the sliding bed frame is rotatably connected to a leg pad for supporting the patient's legs, and one side of the leg pad is fixedly connected to a foot fixing rod for fixing the patient's feet to ensure that the body parts are stable during traction; the floating bed frame is rotatably connected to a driving screw through a bearing seat, and the bottom of the sliding plate The driving mechanism that the cam is in contact with the driving wheel is fixedly provided with a toothed connecting strip which is cooperatively connected with the toothed connecting strip.

[0006] Furthermore, an adjustable rotating shaft is provided on the traction bed base, and the traction bed base is rotatably connected to the fixed bed frame via the adjustable rotating shaft. The adjustable rotating shaft is used to realize the rotation of the fixed bed frame relative to the traction bed base so as to adjust the angle of the fixed bed frame. A group of side cushions are fixedly connected on both sides of the fixed bed frame. The side cushions can provide comfortable support and play a certain protective role on both sides of the patient's body. The side cushions are rotatably connected to underarm fixing rods, which are used to be clamped under the patient's armpits to fix the patient's torso and ensure that the torso position is stable during traction.

[0007] Furthermore, the traction bed base is rotatably connected to the fixed bed frame by adjusting the rotating shaft, and the bottom of the fixed bed frame is rotatably connected to an electric telescopic rod, and the other end of the electric telescopic rod is rotatably connected to the traction bed base. The electric telescopic rod can adjust the angle of the fixed bed frame through telescopic action to keep it in a horizontal or other suitable position to meet the needs of different patients.

[0008] Furthermore, the fixed bed frame is elastically connected to the floating bed frame through a first spring. The first spring provides elastic support for the floating bed frame so that it can float up and down relative to the fixed bed frame. Four lifting sleeves are fixedly connected to the fixed bed frame by bolts. Four lifting tubes are fixedly connected to the bottom of the floating bed frame by bolts. The lifting tubes are inserted into the lifting sleeves. The first spring is arranged between the lifting sleeves and the lifting tubes. The cooperation of the lifting sleeves and the lifting tubes provides a guide for the up and down floating of the floating bed frame, ensuring a smooth floating process. At the same time, the first spring can play a buffering role when the floating bed frame is pressed down or raised.

[0009] Furthermore, a first bevel gear is fixedly connected to the driving screw, and a position adjustment shaft is rotatably connected to the floating bed frame through a bearing seat. The position adjustment shaft and the driving screw are perpendicular to each other, and one end of the position adjustment shaft is fixedly connected to a second bevel gear, and the second bevel gear and the first bevel gear are meshed with each other. The rotation of the position adjustment shaft can be transmitted to the driving screw through the meshing of the bevel gears, and the other end of the position adjustment shaft is fixedly connected to a position adjustment handwheel. The position adjustment handwheel is used to manually rotate the position adjustment shaft, thereby driving the driving screw to rotate, thereby realizing manual adjustment of the position of the sliding bed frame, which is convenient for adjusting to a suitable initial position before use.

[0010] Furthermore, the first ratchet plate and the second ratchet plate are both machined with one-way ratchets, and the one-way ratchets of the first ratchet plate and the second ratchet plate are interlocked with each other and the tooth tips are facing opposite directions. This one-way ratchet structure allows the drive shaft to drive the drive screw to rotate in only one direction, thereby realizing one-way transmission, ensuring that the rotation of the drive shaft can drive the screw to transmit when the floating bed frame is pressed down, but no power is transmitted when it rises. A fixing plate is fixedly connected to the floating bed frame, and the drive shaft passes through the fixing plate, and a spring block plate is fixedly connected to the drive shaft. A second spring is arranged between the fixing plate and the spring block plate, and the second spring is used to push the spring block plate to keep the first ratchet plate and the second ratchet plate tightly engaged, thereby ensuring reliable transmission.

[0011] Furthermore, a fixing plate is fixedly connected to the floating bed frame, the driving shaft passes through the fixing plate, and a spring block plate is fixedly connected to the driving shaft. A second spring is arranged between the fixing plate and the spring block plate. The elastic force of the second spring keeps the first ratchet plate on the driving shaft and the second ratchet plate on the driving screw in an engaged state, ensuring that when the driving shaft rotates, the driving screw can be driven to rotate through the one-way transmission of the ratchet plate to realize power transmission.

[0012] Furthermore, a force adjustment wheel is fixedly connected to the driving screw, a fixed nut is fixedly connected to the floating bed frame, the fixed nut is fixedly connected to the friction adjustment screw through a thread, and the force adjustment wheel cooperates with the friction adjustment screw to control the rotational resistance of the driving screw by adjusting the friction between the two, thereby adjusting the traction force.

[0013] Furthermore, one end of the friction adjusting screw is rotatably connected to a friction disk, which contacts the force adjusting wheel, and the friction force is adjusted by changing the pressure between the two. A reducer is also fixedly connected to the floating bed frame, and the other end of the friction adjusting screw is fixedly connected to the output end of the reducer, and the input end of the reducer is fixedly connected to a force adjusting rod. The reducer is used to slow down the rotation of the force adjusting rod and increase the torque, making the adjustment more labor-saving and precise. The force adjusting rod is rotatably connected to the floating bed frame through a bearing seat, and one end of the force adjusting rod is fixedly connected to a force adjusting handwheel. The force adjusting handwheel facilitates the user to manually adjust the position of the friction adjusting screw, thereby changing the friction between the friction disk and the force adjusting wheel, and realizing the adjustment of the traction force. This structure avoids the danger caused by excessive traction force from the source, and is more reliable and safer than the pressure sensor overload protection used in traditional traction beds.

[0014] Furthermore, two sets of linear guide rails are fixedly connected to the floating bed frame, and the two sets of linear guide rails are parallel to each other, and each linear guide rail is slidably connected to two linear sliders. The cooperation of the linear guide rails and the linear sliders provides guidance and support for the sliding of the sliding plate, ensuring smooth sliding. The linear slider is fixedly connected to the sliding plate, and the sliding plate is fixedly connected to the sliding bed frame. The sliding plate slides on the linear guide rails through the linear sliders, driving the sliding bed frame to move, thereby realizing the adjustment of the distance between the hip placement pad, the leg placement pad and the torso placement pad, and realizing traction and stretching of the spine.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention proposes an intelligent traction bed that automatically adjusts traction force. The intelligent traction bed adopts a method that combines a mechanical structure with friction force adjustment. By rotating the force adjustment handwheel, the friction force adjustment screw is driven to rotate after deceleration and torque increase by the reducer, thereby changing the pressure between the friction disk and the force adjustment wheel, and realizing precise adjustment of the friction force. When the traction force needs to be increased, the friction between the two is reduced, so that the floating bed frame can be pressed down more smoothly; when the traction force needs to be reduced, the friction between the two is increased to limit the speed and amplitude of the floating bed frame. This adjustment method does not rely on electronic components, does not have problems such as sensor failure, and has higher reliability. At the same time, medical staff can intuitively and accurately adjust the traction force according to the patient's physical condition and treatment needs, and control the treatment process in real time. Compared with the electronic protection mechanism of traditional traction beds, it provides patients with more reliable and safer treatment guarantees. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0018] Figure 1 The schematic diagram shows the appearance and structure of an intelligent traction bed that automatically adjusts traction force according to one embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the split structure of a fixed bed frame and a floating bed frame of an intelligent traction bed with automatic traction force adjustment according to one embodiment of the present invention is shown;

[0020] Figure 3 Schematically shows a schematic diagram of a first spring structure of an intelligent traction bed that automatically adjusts traction force according to one embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the floating bed frame structure of an intelligent traction bed with automatic traction force adjustment according to one embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram of the linear guide rail structure of an intelligent traction bed that automatically adjusts traction force according to one embodiment of the present invention is shown;

[0023] Figure 6 A schematic diagram of the structure of a force adjustment wheel and a friction disc of an intelligent traction bed that automatically adjusts traction force according to one embodiment of the present invention is shown;

[0024] Figure 7 The figure schematically shows a driving shaft structure diagram of an intelligent traction bed that automatically adjusts traction force according to one embodiment of the present invention.

[0025] Numbers in the figure: 1, traction bed base; 2, adjusting rotation axis; 3, fixed bed frame; 4, electric telescopic rod; 5, side cushions; 6, underarm fixing rod; 7, floating bed frame; 8, first spring; 9, lifting sleeve; 10, lifting tube; 11, trunk placement pad; 12, linear guide rail; 13, linear slider; 14, sliding plate; 15, sliding bed frame; 16, hip placement pad; 17, leg placement pad; 18, foot fixing rod; 19, driving screw; 20, screw nut; 21, first A bevel gear; 22. Position adjustment shaft; 23. Second bevel gear; 24. Position adjustment handwheel; 25. Drive shaft; 26. Drive gear; 27. Drive rack; 28. First ratchet plate; 29. Second ratchet plate; 30. One-way ratchet; 31. Fixed plate; 32. Spring block; 33. Second spring; 34. Force adjustment wheel; 35. Fixed nut; 36. Friction adjustment screw; 37. Friction plate; 38. Reducer; 39. Force adjustment rod; 40. Force adjustment handwheel. DETAILED DESCRIPTION

[0026] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0027] According to the embodiment of the present invention, Figure 1-Figure 7 An intelligent traction bed with automatically adjustable traction force includes a traction bed base 1, which serves as the foundational support for the entire bed and provides a stable mounting base for other components, ensuring the bed remains stable during use. The traction bed base 1 is provided with an adjustable rotation axis 2, which connects the traction bed base 1 to a fixed bed frame 3, enabling the fixed bed frame 3 to rotate about it, thereby adjusting the angle of the fixed bed frame 3. The traction bed base 1 is rotatably connected to the fixed bed frame 3 via the adjustable rotation axis 2. The fixed bed frame 3 is one of the main load-bearing structures of the traction bed, used to mount and secure other related components and provide a basic platform for the patient's torso to rest. An electric telescopic rod 4 is rotatably connected to the bottom of the fixed bed frame 3. The two ends of the electric telescopic rod 4 are rotatably connected to the fixed bed frame 3 and the traction bed base 1, respectively. The telescopic movement of the electric telescopic rod 4 drives the fixed bed frame 3 to rotate about the adjustable rotation axis 2, thereby precisely adjusting the angle of the fixed bed frame 3 to meet the treatment needs of different patients. A set of side cushions 5 are fixedly connected to each side of the fixed bed frame 3. Made of a soft material, these cushions provide comfortable support and protection for the patient, reducing discomfort caused by contact with hard components during treatment. Axillary fixation rods 6 are pivotally connected to the side cushions 5. These rods are used to secure the patient's armpits. During traction, clamping the rods under the patient's armpits stabilizes the patient's torso, ensuring effective traction and preventing slippage.

[0028] The floating bed frame 7 is elastically connected to the fixed bed frame 3 via a first spring 8. The first spring 8 has an elastic buffering effect, which enables the floating bed frame 7 to be elastically connected to the fixed bed frame 3. When the patient lies on the floating bed frame 7, the first spring 8 can produce corresponding elastic deformation according to the patient's weight and movement, providing comfortable support. Four lifting sleeves 9 are fixedly connected to the fixed bed frame 3 by bolts, and four lifting tubes 10 are fixedly connected to the bottom of the floating bed frame 7 by bolts. The lifting sleeves 9 and the lifting tubes 10 cooperate with each other to form a guide structure, which guides and limits the lifting movement of the floating bed frame 7, ensuring that the floating bed frame 7 remains stable during the lifting process and does not tilt or deflect. The lifting tube 10 is inserted into the lifting sleeve 9, and the first spring 8 is arranged between the lifting sleeve 9 and the lifting tube 10.

[0029] A trunk placement pad 11 is fixedly connected to the fixed bed frame 3. The trunk placement pad 11 is made of soft and comfortable material and provides a placement position for the patient's trunk, so that the patient can maintain a comfortable posture during treatment.

[0030] Two sets of linear guides 12 are fixedly connected to the floating bed frame 7. These two sets of linear guides 12 are parallel to each other. Linear guides 12 are high-precision linear motion guide components that provide precise guidance for the sliding of sliding plates 14, ensuring that they can slide smoothly in a straight line. Each linear guide 12 is slidably connected to two linear sliders 13. The linear sliders 13 cooperate with the linear guides 12 to enable the sliding plates 14 to slide freely on the linear guides 12, reducing frictional resistance during the sliding process and improving the smoothness of the sliding. Sliding plates 14 are fixedly connected to the linear sliders 13. Sliding plates 14 are used to connect the linear sliders 13 and the sliding bed frame 15, transmitting the sliding motion of the linear sliders 13 to the sliding bed frame 15, thereby driving the sliding bed frame 15 to move on the floating bed frame 7. The sliding plate 14 is fixedly connected to a sliding bed frame 15. The sliding bed frame 15 supports components such as a hip rest pad 16 and a leg rest pad 17. By sliding on the floating bed frame 7, the position of the hips and legs can be adjusted to accommodate different patient sizes and traction needs. The hip rest pad 16 is fixedly connected to the sliding bed frame 15. The hip rest pad 16 provides a resting position for the patient's hips and is made of comfortable materials to reduce pressure and discomfort on the patient's hips during treatment. A leg rest pad 17 is pivotally connected to one end of the sliding bed frame 15. The leg rest pad 17 is used to rest the patient's legs. The pivoting connection adapts to different leg postures and improves patient comfort. A foot fixing rod 18 is fixedly connected to one side of the leg rest pad 17. The foot fixing rod 18 is used to secure the patient's feet. The patient's feet are clamped between the foot fixing rod 18 and the leg rest pad 17, stabilizing the patient's lower limbs and preventing them from sliding during traction, thereby ensuring the traction effect.

[0031] The floating bed frame 7 is rotatably connected to a drive screw 19 via a bearing block. The drive screw 19 is a transmission component that converts rotational motion into linear motion. By cooperating with a screw nut 20, the rotational motion of the drive screw 19 is converted into linear motion of the sliding bed frame 15, thereby adjusting the position of the hip and leg rest pads 16 and 17. A screw nut 20 is fixedly connected to the bottom of the sliding plate 14. The screw nut 20 and the drive screw 19 are connected by a threaded transmission. When the drive screw 19 rotates, the screw nut 20 moves along the axis of the drive screw 19, thereby driving the sliding plate 14 and the sliding bed frame 15 together. The drive screw 19 passes through the screw nut 20 and is threadedly connected to the screw nut 20. A first bevel gear 21 is fixedly connected to the drive screw 19 and meshes with a second bevel gear 23 to transmit power and change direction. This transmits the rotational motion of the position adjustment shaft 22 to the drive screw 19, thereby driving the drive screw 19. A position adjustment shaft 22 is rotatably connected to the floating bed frame 7 via a bearing seat. The position adjustment shaft 22 is perpendicular to the drive screw 19 and is used to mount the second bevel gear 23 and the position adjustment handwheel 24. Power generated by the user turning the position adjustment handwheel 24 is transmitted to the second bevel gear 23, which is then transmitted to the first bevel gear 21 and the drive screw 19 through gear meshing. A second bevel gear 23 is fixedly connected to one end of the position adjustment shaft 22. The second bevel gear 23 meshes with the first bevel gear 21, transmitting power and changing direction, thereby transmitting the rotational motion of the position adjustment shaft 22 to the drive screw 19, enabling rotation of the drive screw 19. The other end of the position adjustment shaft 22 is fixedly connected to a position adjustment handwheel 24 , which is convenient for the user to operate manually. By rotating the position adjustment handwheel 24 , the rotation of the driving screw 19 can be easily adjusted, thereby realizing manual adjustment of the position of the sliding bed frame 15 .

[0032] The floating bed frame 7 is also slidably connected to a drive shaft 25 via a sliding bearing. The drive shaft 25 is coaxial with the drive screw 19 and is used to mount components such as a drive gear 26 and a first ratchet plate 28. As the floating bed frame 7 moves up and down, the drive shaft 25 slides with the floating bed frame 7 and rotates due to the meshing action of the drive gear 26 and the drive rack 27. A drive gear 26 is fixedly connected to the drive shaft 25 and meshes with the drive rack 27. When the floating bed frame 7 descends, the drive gear 26 descends with the drive shaft 25 and meshes with the drive rack 27. Drive rack 27 rotates the drive gear 26, thereby driving the drive shaft 25. A drive rack 27 is fixedly connected to the fixed bed frame 3 and meshes with the drive gear 26, providing rotational power for the drive gear 26. When the floating bed frame 7 descends, the drive gear 26 rolls on the drive rack 27, thereby rotating the drive shaft 25. One end of the driving shaft 25 is fixedly connected to a first ratchet plate 28, and one end of the driving screw rod 19 is fixedly connected to a second ratchet plate 29. The first ratchet plate 28 and the second ratchet plate 29 are both processed with one-way ratchet teeth 30. The one-way ratchet teeth 30 of the first ratchet plate 28 and the second ratchet plate 29 are interlocked with each other and the tooth tips face opposite directions. The first ratchet plate 28 and the second ratchet plate 29 form a one-way transmission mechanism. When the driving shaft 25 rotates, under the action of the one-way ratchet teeth 30, it can drive the driving screw rod 19 to rotate. When the driving screw rod 19 rotates actively, due to the characteristics of the one-way ratchet teeth 30, it will not drive the driving shaft 25 to rotate, thereby realizing one-way transmission of power, ensuring that during the traction process, the driving screw rod 19 can rotate according to the descending movement of the floating bed frame 7, thereby realizing the movement of the sliding bed frame 15, and reverse transmission will not occur under other circumstances.

[0033] A fixing plate 31 is fixedly connected to the floating bed frame 7, and the drive shaft 25 passes through the fixing plate 31, and a spring block plate 32 is fixedly connected to the drive shaft 25. A second spring 33 is arranged between the fixing plate 31 and the spring block plate 32. The second spring 33 is used to provide a reset force for the drive shaft 25. When the floating bed frame 7 rises, the second spring 33 pushes the drive shaft 25 to move upward, so that the first ratchet plate 28 and the second ratchet plate 29 maintain a good engagement state, ensuring the normal operation of the one-way transmission mechanism.

[0034] A force adjustment wheel 34 is fixedly connected to the drive screw 19. The force adjustment wheel 34 is used to cooperate with the friction disc 37 to adjust the traction force by changing the friction between the two. A fixed nut 35 is fixedly connected to the floating bed frame 7. The fixed nut 35 is fixedly connected to the friction adjustment screw 36 through a thread. The friction adjustment screw 36 can rotate within the fixed nut 35 and move axially. By rotating the friction adjustment screw 36, the pressure between the friction disc 37 and the force adjustment wheel 34 can be adjusted, thereby changing the friction between the two. One end of the friction adjustment screw 36 is rotatably connected to the friction disc 37, and the friction disc 37 is in contact with the force adjustment wheel 34. When the friction adjustment screw 36 moves axially, it will drive the friction disc 37 closer to or away from the force adjustment wheel 34, thereby increasing or decreasing the pressure between the two, and then adjusting the magnitude of the friction force to achieve control of the traction force. The floating bed frame 7 is also fixedly connected to a reducer 38. The input end of the reducer 38 is connected to the force adjustment rod 39, and the output end is connected to the friction adjustment screw 36. This serves to reduce speed and increase torque, making it easier for the user to turn the force adjustment handwheel 40 while enabling more precise force adjustment. The other end of the friction adjustment screw 36 is fixedly connected to the output end of the reducer 38. The input end of the reducer 38 is fixedly connected to the force adjustment rod 39. The force adjustment rod 39 is rotatably connected to the floating bed frame 7 via a bearing seat. One end of the force adjustment rod 39 is fixedly connected to the force adjustment handwheel 40. The force adjustment handwheel 40 is the operating component for the user to adjust the traction force. By turning the force adjustment handwheel 40, after the reducer 38 reduces speed and increases torque, it drives the friction adjustment screw 36 to rotate, thereby adjusting the friction between the friction disc 37 and the force adjustment wheel 34, thereby controlling the traction force.

[0035] Working Principle: When using an intelligent traction bed that automatically adjusts traction, first turn the force adjustment handwheel 40. The force adjustment handwheel 40 drives the input end of the reducer 38 to rotate through the force adjustment rod 39. The reducer 38 acts as a decelerator and torque increaser, so that the output end drives the friction adjustment screw 36 to rotate at a slower speed and with greater torque. The friction adjustment screw 36 and the fixed nut 35 are threaded together. As they rotate, they move axially inward, thereby pushing the friction disc 37 closer to the force adjustment wheel 34, increasing the pressure between the friction disc 37 and the force adjustment wheel 34, thereby increasing the friction between the two. When the friction force is large enough, the friction disc 37 clamps the force adjustment wheel 34, and the drive screw 19 is locked and cannot rotate.

[0036] The patient then lies on the traction bed, placing their torso on the trunk support pad 11, which provides comfortable support for the patient's torso. Two armpit fixing rods 6 are clamped under the armpits. The armpit fixing rods 6, through their pivoting connection to the side cushions 5, can adapt to the different armpit positions of the patient, stabilize the patient's torso, and prevent the torso from sliding during traction. The patient's buttocks are placed on the hip support pad 16, which provides comfortable support for the buttocks. The legs are placed on the leg support pad 17, which, through its pivoting connection to the sliding bed frame 15, can adapt to different leg postures. The patient's feet are then clamped between the foot fixing rods 18 and the leg support pad 17. The foot fixing rods 18 ensure the stability of the patient's feet and prevent the lower limbs from sliding. The angle of the fixed bed frame 3 is then adjusted using the electric telescopic rod 4. The telescopic movement of the electric telescopic rod 4 drives the fixed bed frame 3 to rotate about the adjustment rotation axis 2, keeping the fixed bed frame 3 in a horizontal position to accommodate the patient's lying position.

[0037] Simultaneously, the force adjustment handwheel 40 is rotated to gradually reduce the friction between the friction disk 37 and the force adjustment wheel 34. At this point, the patient's weight acts on the floating bed frame 7, which floats downward on the fixed bed frame 3 via the first spring 8. The lifting tube 10 slides downward within the lifting sleeve 9, compressing the first spring 8 and acting as a buffer. As the floating bed frame 7 is pressed downward, the drive gear 26 on the drive shaft 25 descends. When the drive gear 26 engages the drive rack 27, the drive rack 27 causes the drive gear 26 to rotate, thereby driving the drive shaft 25. At this point, the second spring 33 pushes the drive shaft 25, causing the first ratchet disc 28 and the second ratchet disc 29 to engage with each other. Because the tips of the one-way ratchet teeth 30 on the two discs face opposite directions, the rotation of the drive shaft 25 drives the drive screw 19 through the one-way engagement of the first and second ratchet discs 28 and 29. When the drive screw 19 rotates, it engages the threaded connection of the screw nut 20, driving the sliding plate 14 and the sliding bed frame 15 to slide along the linear guide 12. The linear guide 12 and the linear slider 13 ensure smooth and precise sliding. This increases the distance between the hip and leg pads 16 and 17 and the torso pad 11, achieving traction and stretching of the spine.

[0038] In this solution, the traction force for the lumbar spine is derived from the patient's own body weight. After losses in the gears and screw drive, the maximum traction force reaches approximately 70% of the patient's body weight. The traction force can be adjusted by adjusting the friction between the friction disc 37 and the force adjustment wheel 34. When the traction force needs to be increased, the friction between the two is reduced, allowing the floating bed frame 7 to press down more smoothly. When the traction force needs to be reduced, the friction between the two is increased, limiting the speed and amplitude of the floating bed frame 7's downward movement. This effectively avoids the dangers of excessive traction force, and is more reliable and safer than the pressure sensor overload protection used in traditional traction beds.

[0039] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An intelligent traction bed with automatic traction adjustment, characterized in that: include: A traction bed base, wherein a fixed bed frame is rotatably connected to the traction bed base, and a floating bed frame is elastically connected to the fixed bed frame; The fixed bed frame is fixedly connected to a trunk rest pad, the floating bed frame is slidably connected to a sliding bed frame, the sliding bed frame is fixedly connected to a hip rest pad, one end of the sliding bed frame is rotatably connected to a leg rest pad, and one side of the leg rest pad is fixedly connected to a foot fixing rod; The floating bed frame is rotatably connected to a driving screw rod through a bearing seat, and a screw nut is fixedly connected to the bottom of the sliding bed frame. The driving screw rod passes through the screw nut, and the driving screw rod is transmission-connected to the driving screw rod through a thread; The floating bed frame is also slidably connected to a drive shaft through a sliding bearing seat, the drive shaft is coaxial with the drive screw, the drive shaft is fixedly connected to a drive gear, the fixed bed frame is fixedly connected to a drive rack, the drive rack and the drive rack are meshed with each other, one end of the drive shaft is fixedly connected to a first ratchet disk, one end of the drive screw is fixedly connected to a second ratchet disk, the first ratchet disk and the second ratchet disk are both machined with one-way ratchet teeth, the one-way ratchet teeth of the first ratchet disk and the second ratchet disk are embedded with each other and the tooth tips are facing opposite directions.

2. The intelligent traction bed with automatic traction adjustment according to claim 1, characterized in that: The traction bed base is provided with an adjustment rotating shaft, and the traction bed base is rotatably connected to the fixed bed frame through the adjustment rotating shaft. A group of side cushions are fixedly connected on both sides of the fixed bed frame, and the side cushions are rotatably connected to underarm fixing rods.

3. The intelligent traction bed with automatic traction adjustment according to claim 1, characterized in that: The traction bed base is rotatably connected to the fixed bed frame by adjusting the rotating shaft. The bottom of the fixed bed frame is rotatably connected to an electric telescopic rod, and the other end of the electric telescopic rod is rotatably connected to the traction bed base.

4. The intelligent traction bed with automatic traction adjustment according to claim 1, characterized in that: The fixed bed frame is elastically connected to the floating bed frame via a first spring, four lifting sleeves are fixedly connected to the fixed bed frame via bolts, four lifting tubes are fixedly connected to the bottom of the floating bed frame via bolts, the lifting tubes are inserted into the lifting sleeves, and the first spring is arranged between the lifting sleeves and the lifting tubes.

5. The intelligent traction bed with automatic traction adjustment according to claim 1, characterized in that: The driving screw is fixedly connected to a first bevel gear, and the floating bed frame is rotatably connected to a position adjustment shaft through a bearing seat. The position adjustment shaft and the driving screw are perpendicular to each other, and one end of the position adjustment shaft is fixedly connected to a second bevel gear, and the second bevel gear and the first bevel gear are meshed with each other. The other end of the position adjustment shaft is fixedly connected to a position adjustment handwheel.

6. The intelligent traction bed with automatic traction adjustment according to claim 1, characterized in that: A fixing plate is fixedly connected to the floating bed frame, the driving shaft passes through the fixing plate, and a spring blocking plate is fixedly connected to the driving shaft, and a second spring is arranged between the fixing plate and the spring blocking plate.

7. The intelligent traction bed with automatic traction adjustment according to claim 5, characterized in that: A fixing plate is fixedly connected to the floating bed frame, the driving shaft passes through the fixing plate, and a spring blocking plate is fixedly connected to the driving shaft, and a second spring is arranged between the fixing plate and the spring blocking plate.

8. The intelligent traction bed with automatic traction adjustment according to claim 1, characterized in that: The driving screw is fixedly connected with a force adjustment wheel, the floating bed frame is fixedly connected with a fixing nut, and the fixing nut is fixedly connected with a friction force adjustment screw through a thread.

9. The intelligent traction bed with automatic traction adjustment according to claim 8, characterized in that: One end of the friction adjustment screw is rotatably connected to a friction disk, and a reducer is fixedly connected to the floating bed frame. The other end of the friction adjustment screw is fixedly connected to the output end of the reducer, and the input end of the reducer is fixedly connected to a force adjustment rod. The force adjustment rod is rotatably connected to the floating bed frame through a bearing seat, and one end of the force adjustment rod is fixedly connected to a force adjustment handwheel.

10. The intelligent traction bed with automatic traction adjustment according to claim 1, characterized in that: The floating bed frame is fixedly connected to two sets of linear guide rails, which are parallel to each other, and each of the linear guide rails is slidably connected to two linear sliders, the linear sliders are fixedly connected to a sliding plate, and the sliding plate is fixedly connected to the sliding bed frame.

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