Medical transfer vehicle

Abstract

The utility model discloses a medical transfer trolley, including main frame, front telescopic frame and elevating stand, front telescopic frame sets up at the front end of main frame, and front telescopic frame includes the front support leg of linear telescoping in horizontal direction through mechanical drive, and the interval when spreading between front support leg is greater than the bed body width of medical bed, and the interval from the top of front support leg to the bottom of trundle is greater than the bed body height of medical bed, and elevating stand elevates in the vertical direction in main frame through mechanical drive, and the width of elevating stand is greater than the average width of human body, and the maximum height stroke of elevating stand is greater than the maximum height of bed body of medical bed, and the minimum height stops at the minimum height of bed body of medical bed. The detachable connection of elevating stand has the support layer of placing on sick bed. The car single -person operation realizes the transport displacement between various medical bed of patient under the standard medical transport requirement, reduces medical burden, saves manpower, reduces secondary injury in the transport process, and reduces the passive vibration of patient in the transport process.

Description

Technical Field

[0001] This utility model relates to manually operated moving instruments, and in particular to a medical transfer cart. Background Technology

[0002] As an effective auxiliary device in modern medical events, medical transfer vehicles have significantly improved the safety, timeliness, and comfort of patient transfer through mechanical structural innovation. This device can be applied to any scenario that requires the transfer of patients, effectively solving the problems of requiring multiple people to work together and consuming physical strength, as well as safety hazards, that exist in traditional transfer processes.

[0003] Patient transfer scenarios: 1. Intra-hospital examination transfer scenario: Patients who are unable to walk or use a wheelchair are transferred from their ward bed to the examination bed in the relevant auxiliary department for examination, and then returned to their ward bed after the examination. The specific steps are as follows: The patient is transferred from the ward bed to a transfer cart (also known as a transfer stretcher). The transfer cart transfers the patient to the examination bed in the auxiliary department (ultrasound, DR, CT, MRI, etc.). The patient is then transferred from the transfer cart to the examination bed of large equipment such as ultrasound, DR, CT, MRI, etc. After the examination, the patient is transferred from the examination bed of large equipment such as ultrasound, DR, CT, MRI, etc. to the transfer cart. The transfer cart transports the patient back to their ward bed. Finally, the patient is transferred from the transfer cart to their ward bed.

[0004] 2. Transfer scenarios required for surgery within medical institutions: The specific steps are as follows: the patient is transferred from the bed to a transfer cart, the transfer cart transfers the patient to the operating room, then the patient is transferred from the transfer cart to the operating table, after the surgery, the patient is transferred from the operating table back to the transfer cart, then the transfer cart transports the patient back to the ward, and finally the patient is transferred from the transfer cart to the bed.

[0005] 3. Transfer scenarios required for rehabilitation and disability care: Patients with paraplegia, hemiplegia and other disabilities who are bedridden for a long time in nursing homes, health care institutions and medical care centers are transferred to the outdoors to get sunshine or to the rehabilitation training room to receive rehabilitation therapy; paraplegia, hemiplegia caused by cerebrovascular diseases, post-fracture surgery, joint replacement and other rehabilitation treatments in medical institutions need to be transferred to the rehabilitation training room to receive rehabilitation therapy.

[0006] The patient transfer scenarios described above all present two main problems: 1. During the transfer, due to factors such as high body mass index, coma, paralysis, or fracture requiring horizontal movement, at least 3-4 people are needed to coordinate multiple transfers simultaneously. This is labor-intensive and time-consuming, and poor coordination among multiple people may lead to secondary injuries to the patient; 2. The journey from the ward to the auxiliary examination department or operating room may involve different ground conditions: the ward floor, the elevator, and the cement or asphalt hardened ground outside the ward building. The unevenness of the ground and the unevenness between different grounds cause vibrations that are directly transmitted to the patient on the transfer vehicle, greatly increasing the patient's physical and psychological suffering. Utility Model Content

[0007] The purpose of this invention is to provide a medical transfer vehicle that smoothly raises and lowers the patient multiple times in a horizontal direction, enabling seamless connection and switching between various scenarios, thus solving the need for user-friendly patient transfer in multiple situations.

[0008] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a medical transfer cart, including a main frame, a front telescopic frame, and a lifting frame. The front telescopic frame is located at the front end of the main frame. The front telescopic frame includes front support legs that extend and retract in a straight line in the horizontal direction via mechanical transmission. The maximum distance between the front support legs is greater than the width of the medical bed. The distance from the top of the front support legs to the bottom of the casters is greater than the height of the medical bed. The lifting frame moves up and down in the height direction within the main frame via mechanical transmission. The suitable width of the lifting frame is 70cm ± 10cm, and the maximum is no more than 90cm, which meets the needs of human body width. The maximum height of the lifting frame is greater than the maximum height of the medical bed. The minimum height of the lifting frame is less than the minimum height of the medical bed. A support layer placed on the hospital bed is detachably connected between the lifting frames.

[0009] Preferably, the system also includes a lifting drive unit and a movable receiving cavity. The main frame includes an upper connecting frame and rear support legs. The upper connecting frame is rectangular, and the rear support legs are respectively located on both sides of the upper connecting frame in the length direction and width direction. The rear support legs extend downward. The front telescopic frame also includes a limiting housing. The front support legs are located on both sides of the limiting housing. One end of the front support leg extends downward, and the other end of the front support leg extends into the limiting housing to form a sliding rod. The top of the limiting housing is connected to the front end of the upper front connecting frame. The telescopic drive unit includes a first handwheel, a driven gear, and a telescopic rack. The telescopic rack is mounted on a sliding rod. The driven gear is evenly distributed between the opposing racks and is rotatably connected to the limiting housing. The first handwheel is connected to the driven gear. The lifting frame also includes a U-shaped frame and a lifting rod. The front end of the U-shaped frame is closed, and the lifting rod is arranged on both sides of the front end of the U-shaped frame in the width direction and extends upward in the height direction. The support layer is set inside the U-shaped frame, and the two sides of the support layer are detachably connected to the two sides of the U-shaped frame in the width direction; The lifting drive unit includes a second handwheel, a gear set, a drive shaft, a flexible component, a lifting gear, and a lifting rack. The gear set is disposed between adjacent rear support legs. The drive shaft is rotatably connected in parallel to both sides of the upper connecting frame in the width direction. One end of the drive shaft is connected to the gear set, and one end of the drive shaft is wound around one end of the flexible component. The other end of the flexible component is connected to the rear end of the U-shaped frame. The other end of the drive shaft is connected to the lifting gear, which meshes with the lifting rack. The lifting rack is disposed on the lifting rod along the height direction. The movable receiving cavity is enclosed by a limiting shell and front support legs located on both sides, and the top of the movable receiving cavity is higher than the head of the bed.

[0010] By adopting the above technical solution, the structural principle of driving the lifting frame to rise and fall is disclosed, as is the structural principle of the front telescopic frame to extend and retract in the horizontal direction.

[0011] Preferably, the limiting housing is rectangular, with sliding openings formed on both sides of the limiting housing, and a plug corresponding to the sliding opening is provided on the top of the front support leg. The sliding rods are arranged opposite each other between adjacent front support legs in the height direction or horizontal direction.

[0012] By adopting the above technical solution, when the front support leg is closed, the plug acts to seal the sliding opening. At the same time, the plug and the limiting shell form a whole, improving the overall structural strength and support performance of the transfer vehicle.

[0013] Preferably, the limiting housing is provided with a sliding cavity, and a movable slide rail is provided between one side of the sliding rod and the sliding cavity. The other side of the sliding rod is bent to form a fixing groove for the telescopic rack. A bearing mounting hole is provided through the limiting housing, and a positioning bearing is provided in the bearing mounting hole. The outer ring of the positioning bearing is connected to the bearing mounting hole. A rotating shaft is provided at the center of the driven gear. The rotating shaft extends axially and cooperates with the inner ring of the positioning bearing. The outer side of the driven gear meshes with the telescopic rack at the opening of the fixing groove.

[0014] By adopting the above technical solution, the positioning bearing ensures the fixation of the rotating shaft, the rotating shaft and the driven gear cooperate to ensure the relative distance between the sliding rods, provide support force in the horizontal or vertical direction, ensure that the sliding rods move accurately and synchronously relative to each other and opposite to each other, and the moving slide rail plays the role of positioning and sliding, while improving the support effect.

[0015] Preferably, the limiting housing is provided with a protective housing, and a drive gear and a transmission gear are provided inside the protective housing. The drive gear is connected to a first handwheel, which is vertically arranged and does not protrude beyond the orthographic projection range of the limiting housing. The top of the drive gear meshes with the transmission gear, and the bottom of the transmission gear meshes with a telescopic rack.

[0016] By adopting the above technical solution, the protective shell verticalizes the horizontally set first handwheel, increases the diameter of the first handwheel, and avoids the horizontally set first handwheel interfering with the lifting and lowering of the lifting frame.

[0017] Preferably, the bottom of the front support leg and the rear support leg are provided with casters, and the lower part of the front support leg and the rear support leg are inclined inward to form a bent section. The distance from the top of the bent section of the front support leg to the bottom of the caster is greater than 10cm, and the distance from the top of the bent section of the rear support leg to the bottom of the caster is less than 35cm.

[0018] By adopting the above technical solution, the bent section at the bottom of the front support leg avoids interference with the baseboard at the head of the bed in the ward, and the bent section at the bottom of the rear support leg avoids collision between the operator's feet and the bottom of the rear support leg when the operator pushes the trolley. The 35cm bent section of the rear support leg is at the height of the foot of the bed, thus avoiding interference between the rear support leg and the foot of the bed.

[0019] Preferably, the upper connecting frame includes a front crossbar, a rear crossbar, a left crossbar, and a right crossbar connected end to end. The front crossbar has a front connecting structure between the left and right crossbars, and the rear crossbar has a rear connecting structure between the left and right crossbars. The rear crossbar has a baffle structure between the rear support legs. The baffle structure encloses the rear support legs on both sides, and the top of the baffle structure covers the connection positions of the rear crossbar with the left and right crossbars respectively. The gear set is located inside the baffle structure, the second handwheel is located at the center of the baffle structure, and the top of the baffle structure forms an observation window for the operator to observe.

[0020] By adopting the above technical solution, the overall structure of the upper connecting frame is disclosed. The baffle structure serves to cover the gear set, and the second handwheel is located in the center of the baffle structure. In order to facilitate the observation of the patient through the observation window when pushing the transfer cart, the baffle structure is designed to provide a convenient way to observe the patient.

[0021] Preferably, the front connection structure includes a front connection block, a lower housing, an upper housing, a C-shaped tube, and a front opening. The front connection blocks are located at both ends of the front crossbar along its length. The front ends of the left and right crossbars are respectively connected to the corresponding front connection blocks. The front connection block has a first through hole for the drive shaft to pass through. The front opening is located on the inward side of the left and right crossbars, and its position corresponds to the lifting gear. The lower housing is located at the bottom of the front connection block, and the upper housing is located at the top of the front connection block. The lifting rod is slidably connected inside the C-shaped tube. The top of the C-shaped tube is connected to the upper housing, and the bottom of the C-shaped tube is connected to the lower housing. The C-shaped tube faces the front opening.

[0022] By adopting the above technical solution, the front connecting block serves to connect the front crossbar with the left and right side bars. At the same time, the front opening enables the meshing of the lifting rack and lifting gear on the lifting rod, so that when the drive shaft rotates, it synchronously drives the lifting frame to rise and fall in the height direction. The C-shaped tube serves to limit the horizontal movement of the lifting rod and prevent the lifting rod from detaching.

[0023] Preferably, the rear connection structure includes a rear connection block, a winding disc, and a lower opening. The rear connection blocks are located at both ends of the rear crossbar along its length. The top of the rear support leg is connected to the bottom of the rear connection block. The ends of the left and right rods are connected to the rear connection block. A second through hole for the drive shaft to pass through is provided inside the rear connection block. A winding disc is provided on the drive shaft. The winding disc is connected to the flexible component. The lower opening is located at the bottom of the rear connection block for the flexible component to pass through.

[0024] By adopting the above technical solution, in which the drive shaft drives the winding disc to rotate during the rotation process, the flexible part is wound up or unwound from the lower opening position, so as to realize the synchronous lifting of the tail of the lifting frame relative to the front in the horizontal direction.

[0025] Preferably, the baffle structure covers the connecting block in the thickness direction, and the baffle structure is provided with handrails on both sides of the observation window. The observation window is in the shape of an inverted triangle and is V-shaped relative to the handrails.

[0026] By adopting the above technical solution, the V-shaped handle makes pushing and pulling the transfer cart more effortless and stable; at the same time, the triangular observation window cooperates with the V-shaped gear system to ensure that the second handwheel is centered.

[0027] Preferably, the top and bottom of the sliding rod are provided with sliding positioning protrusions, which extend along the length of the sliding rod. The top and bottom of the sliding cavity are provided with sliding positioning grooves that cooperate with the sliding positioning protrusions, which extend along the length of the limiting housing.

[0028] By adopting the above technical solutions, the guiding and supporting effects of the sliding rod during movement are enhanced.

[0029] Preferably, the rear connection structure includes a rear opening, a side reel, an adjusting block, a first meshing gear, and a second meshing gear. The side reel is connected to a flexible component, the adjusting block is mounted on the rear crossbar, and the side reel and the second meshing gear are coaxially rotatably connected to the adjusting block. The first meshing gear is mounted on a drive shaft, and the rear opening is located at corresponding positions on the left and right sides of the crossbar. The first meshing gear and the second meshing gear mesh with each other at the rear opening position.

[0030] By adopting the above technical solutions, multiple implementation methods of the rear connection structure are disclosed. These methods are more convenient for installation and processing, and at the same time facilitate the connection of flexible components and overall maintenance.

[0031] Preferably, the caster includes a support, a fixed wheel, and an elastic outer layer. The fixed wheel is rotatably connected to both sides of the support. The elastic outer layer covers the outside of the fixed wheel and is made of an elastic material. Buffer holes are evenly distributed within the elastic outer layer, and these buffer holes are arranged through the axial direction of the elastic outer layer and are evenly distributed around it.

[0032] By adopting the above technical solution, compared with traditional transfer carts, it has a better vibration reduction effect, enhances the stability of the transfer cart during movement, reduces vibration during movement, and improves patient comfort.

[0033] Preferably, bearing seats are rotatably connected to both ends of the drive shaft along its length, and the bearing seats are connected to the front crossbar and the rear crossbar.

[0034] By adopting the above technical solution, the drive shaft is ensured to rotate in a centered state within the left and right side rods, thus guaranteeing the smoothness and accuracy of the rotation.

[0035] In summary, this transfer vehicle has the following advantages compared to traditional transfer vehicles: 1. The horizontal telescopic design of the front telescopic frame allows for adjustable length of the front support legs, which can be greater than the width of the head of the bed. Combined with the vertical lifting mechanism, i.e., the lifting stroke is greater than the height of the bed, it can transfer patients vertically upward from the bed. This solves the difficulties of traditional multi-person collaborative patient transport by lateral movement, making it more labor-saving and easier to operate. Horizontal and vertical bidirectional adjustment is achieved through the first and second handwheels, which significantly improves the versatility and operational accuracy of the equipment. 2. It also achieves a high degree of adaptability to various medical beds, ensuring precise docking between the transfer vehicle and the hospital bed, and smooth access to ward doors, elevator doors, and examination room doors, etc.; 3. The handwheel driven gear set is used to replace the traditional electric or hydraulic system. The handwheel is embedded in the protective housing through the gear and rack cooperation, avoiding the risk of collision during operation. This pure mechanical transmission solution reduces medical costs and facilitates maintenance while ensuring reliability. It is suitable for medical institutions and health care institutions at all levels. 4. By using flexible components such as steel wire ropes in conjunction with the drive shaft winding disc and the synchronous control of dual drive shafts, the smooth movement of the lifting frame is ensured, reducing its own weight and preventing phenomena such as tangling. 5. Ergonomic improvements: The embedded handwheel design and inverted triangular observation window optimize the operator's field of vision and spatial layout, making it easier for the operator to observe the patient and reducing the possibility of misoperation. The elastic buffer layer and buffer hole design of the casters reduce movement vibration and improve patient comfort. This is a direct improvement over traditional rigid wheels. 6. The innovative safety protection structure, with the baffle structure enclosing the gear set and the bent section of the rear support leg, enhances the stability of the equipment and prevents exposed mechanical parts from causing safety hazards, reflecting a deep adaptation to medical equipment safety standards. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 yes Figure 1 The enlarged schematic diagram of section A shown is used to illustrate the structure of the first handwheel; Figure 3 This is a schematic diagram of the front support leg in the open state of Embodiment 1; Figure 4 This is a schematic diagram of the structure of the back of Example 1; Figure 5 This is a cross-sectional view of Embodiment 1 at the position of the limiting housing; Figure 6 This is a schematic diagram of the structure at the front connection position in Embodiment 1. Figure 1 ; Figure 7 This is a schematic diagram of the structure at the front connection position in Embodiment 1. Figure 2 ; Figure 8 This is a schematic diagram of the structure at the rear connection position in Embodiment 1. Figure 1 ; Figure 9 This is a schematic diagram of the structure at the rear connection position in Embodiment 1. Figure 2 ; Figure 10 This is a schematic diagram of the gear system in Example 1; Figure 11 This is a structural schematic diagram of the caster in Example 1; Figure 12This is a cross-sectional schematic diagram of the support layer connection position in Embodiment 1; Figure 13 This is a schematic diagram of the structure after removing the lifting frame in Example 2; Figure 14 yes Figure 13 An enlarged schematic diagram of section C is shown below; Figure 15 This is a schematic diagram of the telescopic drive unit in Embodiment 3; Figure 16 This is a schematic diagram of the telescopic drive unit in Embodiment 4; In the diagram, 1. Main frame; 11. Upper connecting frame; 12. Front crossbar; 13. Rear crossbar; 14. Left side bar; 15. Right side bar; 16. Rear support leg; 2. Front telescopic frame; 21. Front support leg; 22. Limiting housing; 23. Sliding cavity; 24. Sliding opening; 25. Sliding rod; 26. Fixing groove; 27. Moving slide rail; 28. Plug; 3. Lifting frame; 31. U-shaped frame; 32. Lifting rod; 33. Second handwheel; 34. Gear set; 35. Drive shaft; 36. Flexible component; 37. Lifting gear; 38. Lifting rack; 4. Support layer; 41. Locking ring; 42. C-ring; 43. Variable opening; 44. Protrusion; 51. First handwheel; 52. Protective housing; 53. Rotating shaft; 54. Driven gear 55. Wheel; 56. Telescopic rack; 57. Bearing mounting hole; 58. Positioning bearing; 59. Drive gear; 60. Speed ​​change gear; 61. Bending section; 62. Caster; 63. Support; 64. Fixed wheel; 65. Elastic outer layer; 66. Buffer hole; 7. Front connection structure; 71. Front connecting block; 72. First through hole; 73. Front opening; 74. Lower housing; 75. Upper housing; 76. C-shaped tube; 8. Rear connection structure; 81. Rear connecting block; 82. Second through hole; 83. Winding disc; 84. Lower opening; 85. Rear opening; 86. Side winding disc; 87. Adjusting block; 88. First meshing gear; 89. Second meshing gear; 90. Baffle structure; 91. Observation window; 92. Handrail; 93. Bearing seat; 94. Sprocket. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings.

[0038] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0039] Example 1: like Figures 1 to 16As shown, the main purpose of this utility model is a medical transfer cart, which opens and closes horizontally at the front to move the patient from the foot of the bed to the head of the bed. The patient is then fixed to both sides of the width of the internal lifting frame 3. The lifting frame 3 moves up and down to avoid the bed body, thus achieving the transfer of the patient and avoiding direct lateral movement of the patient.

[0040] like Figures 1 to 16 As shown, the transfer cart includes a main frame 1, a front telescopic frame 2, and a lifting frame 3. The front telescopic frame 2 is located at the front end of the main frame 1. The front telescopic frame 2 includes front support legs 21 that open and close in a straight line in the horizontal direction via mechanical transmission. The maximum distance between the front support legs 21 when they open is greater than the width of the head of the hospital bed. The distance from the top of the front support legs 21 to the bottom of the casters 62 is greater than the height of the head of the hospital bed. The lifting frame 3 moves up and down in the height direction within the main frame 1 via mechanical transmission. The width of the lifting frame 3 is greater than the width of the hospital bed. The maximum height travel of the lifting frame 3 is greater than the height of the hospital bed. The width of the lifting frame 3 is preferably the average width of a human body, recommended to be 70±10cm or less than 90cm. A support layer 4 that is placed on the hospital bed is detachably connected between the lifting frames 3.

[0041] like Figures 1 to 16 As shown, the overall structure of the main frame 1 includes an upper connecting frame 11 and a rear support leg 16. The overall structure of the upper connecting frame 11 is rectangular. In embodiment 1, the upper connecting frame 11 is made of a round tube. In embodiment 2, it is disclosed that the upper connecting frame 11 is made of a square tube, which is also within the scope of protection. The rear support leg 16 is respectively set on both sides of the rear end of the upper connecting frame 11 in the length direction and the width direction. The rear support leg 16 extends downward and is connected to a caster 62. At the same time, the rear support leg 16 is provided with a bending section 61 above the caster 62. The bending section 61 is inclined towards the bed body. At the same time, the distance from the top of the bending section 61 to the bottom of the caster 62 is less than 35cm to avoid collision with the top of the bed foot. The function of the bending section 61 is to prevent the feet from kicking the rear support leg 16 when pushing the bed.

[0042] like Figures 1 to 3As shown, the front telescopic frame 2 is located at the front end of the upper connecting frame 11, corresponding to the rear support leg 16, serving to support the front end of the bed and also having a horizontal linear telescopic function. The front telescopic frame 2 also includes a limiting housing 22, which is used to accommodate and position the sliding rod 25. The front support leg 21 is located on both sides of the limiting housing 22, with one end of the front support leg 21 extending downwards and the other end extending into the limiting housing 22 to form the sliding rod 25. The top of the limiting housing 22 is connected to the front end of the upper front connecting frame via a vertical rod. The limiting housing 22 is rectangular, and its two sides form... The sliding opening 24 is provided, and the top of the front support leg 21 is provided with a plug 28 corresponding to the sliding opening 24. The sliding rod 25 is arranged opposite to each other in the height direction or horizontal direction between adjacent front support legs 21. In embodiment 1, the sliding rod 25 is arranged opposite to each other in the horizontal direction. In order to position the front support leg 21 during installation, the top and bottom of the sliding rod 25 are provided with sliding positioning protrusions, which extend along the length direction of the sliding rod 25. The top and bottom of the sliding cavity 23 are provided with sliding positioning grooves that cooperate with the sliding positioning protrusions, which extend along the length direction of the limiting housing 22.

[0043] Meanwhile, to prevent the front support leg 21 from hitting the baseboard at the caster 62 position, a bending section 61 is also provided at the lower part of the front support leg 21. The bending section 61 is inclined inward, and the distance from the top of the bending section 61 of the front support leg 21 to the bottom of the caster 62 is greater than 10cm. The front support leg 21 and the limiting housing 22 form a movable accommodating cavity, and the top of the movable accommodating cavity is higher than the head of the bed.

[0044] like Figures 2 to 5 As shown, the front telescopic frame 2 achieves length extension and retraction through a telescopic drive unit. The telescopic drive unit includes a first handwheel 51, a driven gear 54, and a telescopic rack 55. The telescopic rack 55 is mounted on the sliding rod 25. The driven gear 54 is evenly distributed between the opposing racks and is rotatably connected to the limiting housing 22. The first handwheel 51 is connected to the driven gear 54. A sliding cavity 23 is provided inside the limiting housing 22. A movable slide rail 27 is provided between one side of the sliding rod 25 and the sliding cavity 23. The other side of the sliding rod 25 is bent to form a telescopic rack. The fixed groove 26 of the strip 55 is provided, and the bearing mounting hole 56 is provided through the limiting housing 22. The positioning bearing 57 is provided in the bearing mounting hole 56. The outer ring of the positioning bearing 57 is connected to the bearing mounting hole 56. The center of the driven gear 54 is provided with a rotating shaft 53. The rotating shaft 53 extends axially and cooperates with the inner ring of the positioning bearing 57. The outer side of the driven gear 54 meshes with the telescopic rack 55 at the opening of the fixed groove 26. Thus, the driven gear 54 ensures that the sliding rod 25 in the upper and lower positions is in the height limit position, and the two extend and retract synchronously.

[0045] like Figure 4As shown, to avoid the first handwheel 51 interfering with the lifting frame 3, a protective shell 52 is provided on the limiting shell 22. The rear hidden part of the protective shell 52 is used for display. A drive gear 58 and a speed-changing gear 59 are provided inside the protective shell 52. The drive gear 58 is connected to the first handwheel 51. The first handwheel 51 is vertically arranged and does not protrude outside the orthographic projection range of the limiting shell 22. The top of the drive gear 58 meshes with the top of the speed-changing gear 59, and the bottom of the speed-changing gear 59 meshes with the telescopic rack 55. The first handwheel 51 is vertically arranged and does not protrude outside the orthographic projection range of the limiting shell 22. By rotating the first handwheel 51, the synchronous inward and outward extension and retraction of the front support leg 21 can be controlled.

[0046] like Figure 3 As shown, the lifting frame 3 also includes a U-shaped frame 31 and lifting rods 32. The front end of the U-shaped frame 31 is closed, and the lifting rods 32 are located on both sides of the front end of the U-shaped frame 31 in the width direction. The lifting rods 32 extend upward in the height direction. The U-shaped frame 31 also has a matching support layer 4. The support layer 4 is made of materials such as canvas or a mattress. The width of the support layer 4 is slightly larger than the width of the U-shaped frame 31. The sides of the support layer 4 extend beyond the U-shaped frame 31 for C-shaped rings 42 to connect. The support layer 4 may contain a bending-resistant elastic honeycomb material. The support layer 4 is generally placed under the mattress as a partition and is not added when using a moving vehicle. Figure 12 As shown, the two sides of the support layer 4 can be wrapped around the two sides of the U-shaped frame 31 with Velcro to provide support for suspending the patient on the support layer 4. It should also be understood that the two sides of the support layer 4 are detachably connected to the two sides of the U-shaped frame 31 in the width direction. Velcro is only one method of detachable connection; hooks and buckles can also be used. Figure 12 As shown, the specific hook structure is as follows: the support layer 4 is made of high-strength fabric such as canvas, and locking rings 41 are provided on both sides of the support layer 4. The locking rings 41 are evenly distributed along the length of the support layer 4. C-rings 42 are provided in the tubes on both sides of the U-shaped frame 31. The C-rings 42 can rotate relative to each other on the side of the U-shaped frame 31. At the same time, a variable opening 43 is formed on the C-rings 42 for the C-rings 42 to be fastened into the locking ring. During use, the C-rings 42 are fixed to the locking rings 41 through the variable openings 43. The C-rings 42 are also evenly distributed along the length of the U-shaped frame 31. There are no less than 4 C-rings 42 on the same side and no less than 8 C-rings 42 on both sides. At the same time, a protrusion 44 for finger rotation is provided on the back of the C-rings 42. The protrusion 44 also restricts the variable opening 43 from rotating out of the U-shaped frame 31, preventing the support layer 4 from falling off.

[0047] like Figure 3 and Figure 4As shown, the structure of the upper connecting frame 11 includes a front crossbar 12, a rear crossbar 13, a left side bar 14, and a right side bar 15 connected end to end. The front crossbar 12 is provided with a front connecting structure 7 between the left side bar 14 and the right side bar 15. The rear crossbar 13 is provided with a rear connecting structure 8 between the left side bar 14 and the right side bar 15. The rear crossbar 13 is provided with a baffle structure 9 between the rear support legs 16. The baffle structure 9 clamps the rear support legs 16 on both sides. The top of the baffle structure 9 covers the connection positions of the rear crossbar 13 with the left side bar 14 and the right side bar 15 respectively. The gear set 34 is located inside the baffle structure 9. The second handwheel 33 is located in the center of the baffle structure 9. The top of the baffle structure 9 and the crossbar form an observation window 91 for the operator to observe.

[0048] The lifting frame 3 has a lifting drive unit, which includes a second handwheel 33, a gear set 34, a drive shaft 35, a flexible component 36, a lifting gear 37, and a lifting rack 38. The gear set 34 is located between adjacent rear support legs 16. Figure 10 As shown, the gear set 34 saves effort through its gear ratio and achieves self-locking to prevent reverse rotation through a worm gear or ratchet. At the same time, the end of the gear set 34 is connected to the end of the drive shaft 35 through the cooperation of the sprocket 94 and the chain. The drive shaft 35 is rotatably connected to both sides in the width direction inside the upper connecting frame 11, that is, there are two drive shafts 35, which are located inside the left rod 14 and the right rod 15 respectively. The end of the drive shaft 35 is connected to the gear set 34. The drive shaft 35 is wound around one end of the flexible part 36 (steel wire or nylon belt, etc.) at this end. The other end of the flexible part 36 is connected to the rear end of the U-shaped frame 31. The other end of the drive shaft 35 is connected to the lifting gear 37, which meshes with the lifting rack 38. The lifting rack 38 is set on the lifting rod 32 along the height direction.

[0049] like Figure 6 and Figure 7As shown, the front connecting structure 7 serves to prevent the lifting gear 37 from being exposed outside the transfer vehicle, and also limits the horizontal movement of the lifting rod 32. The front connecting structure 7 includes a front connecting block 71, a lower housing 74, an upper housing 75, a C-shaped tube 76, and a front opening 73. The upper housing 75 and the lower housing 74 are made of plastic or metal and are fixed to each other by bolts. The front connecting blocks 71 are located at both ends of the front crossbar 12 along its length. The front ends of the left rod 14 and the right rod 15 are respectively connected to the corresponding front connecting blocks 71. The front connecting blocks 71 are welded to the left rod 14 and the right rod 15. To achieve fixation, the front connecting block 71 is provided with a first through hole 72 for the drive shaft 35 to pass through. The front opening 73 is located on the side inward of the left rod 14 and the right rod 15, and the position of the front opening 73 corresponds to the lifting gear 37. The lower housing 74 is located at the bottom of the front connecting block 71, and the upper housing 75 is located at the top of the front connecting block 71. The lifting rod 32 is slidably connected in the C-shaped tube 76. The top of the C-shaped tube 76 is connected to the upper housing 75, and the bottom of the C-shaped tube 76 is connected to the lower housing 74. The C-shaped tube 76 is set towards the front opening 73 and plays the roles of auxiliary guidance, limiting and support.

[0050] like Figure 8 and Figure 9 As shown, the rear connecting structure 8 serves to unwind and connect the components. The rear connecting structure 8 includes a rear connecting block 81, a winding disc 83, and a lower opening 84. The rear connecting block 81 connects the rear crossbar 13, the left side bar 14, and the right side bar 15 by welding. The rear connecting blocks 81 are located at both ends of the rear crossbar 13 along its length. The top of the rear support leg 16 is connected to the bottom of the rear connecting block 81. The ends of the left side bar 14 and the right side bar 15 are connected to the rear connecting block 81. The rear connecting block 81 has a second through hole 82 for the drive shaft 35 to pass through. The winding disc 83 is fixedly connected to the drive shaft 35 and is connected to the flexible component 36. The lower opening 84 is located at the bottom of the rear connecting block 81 for the flexible component 36 to pass through. To improve the rotation and support effect of the drive shaft 35, bearing seats 93 are rotatably connected to both ends of the drive shaft 35 along its length. The bearing seats 93 are connected to the front crossbar 12 and the rear crossbar 13.

[0051] like Figure 4 and Figure 10 As shown, in order to cover the gear set 34, a connecting rod is provided between adjacent rear support legs 16 below the baffle structure 9. The baffle structure 9 covers the rear connecting block 81 in the thickness direction, and at the same time covers the connecting rod and the gear set 34. An inverted triangular observation window 91 is provided above the middle part of the baffle structure 9. At the same time, handrails 92 are provided on both sides of the observation window 91. The opposing handrails 92 are inclined, and the two handrails 92 are V-shaped.

[0052] like Figure 11As shown, to reduce vibration during the movement of the transfer cart, the caster 62 includes a support 63, a fixed wheel 64, and an elastic outer layer 65. The fixed wheel 64 is rotatably connected to both sides of the support 63. The support 63 is connected to the bottom of the front support leg 21 or the rear support leg 16. The fixed wheel 64 is connected to the support 63 through a bearing. The elastic outer layer 65 covers the outside of the fixed wheel 64 and is made of elastic materials such as rubber. Buffer holes 66 are evenly distributed inside the elastic outer layer 65. The buffer holes 66 are arranged through the axial direction of the elastic outer layer 65 and are evenly distributed around the elastic outer layer 65. When passing over bumpy roads, the elastic outer layer 65 deforms more at the position of the buffer holes 66, thus having a better cushioning effect, enhancing the stability of the transfer cart during movement, reducing vibration during movement, and improving patient comfort.

[0053] Working principle: During use, the support layer 4 is placed under the mattress of the hospital bed for the patient's use. The transfer cart is moved into the ward. The first handwheel 51 is turned to open the front support legs 21 horizontally. Then, the second handwheel 33 is turned to raise the lifting frame 3 until it is higher than the foot of the bed. The transfer cart is then pushed forward until the limiting housing 22 is at the head of the bed. Simultaneously, the baffle structure 9 may not be above the foot of the bed. The second handwheel 33 is then turned to lower the U-shaped frame 31 to the mattress height. The two sides of the support layer 4 are wrapped around the U-shaped frame 31 with Velcro. The second handwheel 33 is turned again to raise the U-shaped frame 31, support layer 4, and patient above the foot of the bed. The transfer cart is then moved backward using the handle. Finally, the first handwheel 51 is turned to close the front support legs 21. The second handwheel 33 is turned to lower the lifting frame 3 to 50cm off the ground to prevent swaying due to a high center of gravity. The transfer cart is then moved using the handle.

[0054] Example 2: like Figure 13 and Figure 14 As shown, the difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 is made entirely of square tubing, and the rear connection structure 8 includes a rear opening 85, a side reel 86, an adjusting block 87, a first meshing gear 88, and a second meshing gear 89. The side reel 86 is connected to the flexible component 36, and the adjusting block 87 is mounted on the rear crossbar 13. The side reel 86 and the second meshing gear 89 are coaxially rotatably connected to the adjusting block 87. The first meshing gear 88 is mounted on the drive shaft 35. The rear opening 85 is located at the corresponding positions of the left rod 14 and the right rod 15. The first meshing gear 88 and the second meshing gear 89 mesh with each other at the rear opening 85, which facilitates the maintenance and replacement of the side reel 86 and the flexible component 36.

[0055] Example 3: like Figure 15As shown, a horizontally symmetrical structure with the first handwheel 51 centrally located is disclosed, in which the vertical rod is located on both sides of the limiting housing 22 of the first handwheel 51.

[0056] Example 4: like Figure 16 As shown, a technical solution is disclosed in which the sliding rod 25 is arranged opposite to each other in the height direction between adjacent front support legs 21. At the same time, the front end of the lifting frame 3 needs to be moved backward by a certain distance. Different arrangements of the sliding rod 25 of the support legs are within the protection scope of this utility model.

Claims

1. A medical transfer cart, characterized in that: The device includes a main frame (1), a front telescopic frame (2), and a lifting frame (3). The front telescopic frame (2) is located at the front end of the main frame (1). The front telescopic frame (2) includes front support legs (21) that extend and retract in a straight line in the horizontal direction via mechanical transmission. The maximum distance between the front support legs (21) is greater than the width of the medical bed. The distance from the top of the front support legs (21) to the bottom of the casters (62) is greater than the height of the medical bed. The lifting frame (3) moves up and down in the height direction within the main frame (1) via mechanical transmission. The maximum height of the lifting frame (3) is greater than the maximum height of the medical bed. The minimum height of the lifting frame (3) is less than the minimum height of the medical bed. A support layer (4) placed on the hospital bed is detachably connected between the lifting frames (3).

2. The medical transfer cart according to claim 1, characterized in that: It also includes a lifting drive unit and a movable accommodating cavity. The main frame (1) includes an upper connecting frame (11) and a rear support leg (16). The upper connecting frame (11) is rectangular. The rear support leg (16) is respectively located on both sides of the width direction at the end of the upper connecting frame (11) in the length direction. The rear support leg (16) extends vertically downward. The front telescopic frame (2) also includes a limiting housing (22). The front support leg (21) is located on both sides of the limiting housing (22). One end of the front support leg (21) extends downward. The other end of the front support leg (21) extends into the limiting housing (22) to form a sliding rod (25). The top of the limiting housing (22) is connected to the front end of the upper front connecting frame. The telescopic drive unit includes a first handwheel (51), a driven gear (54), and a telescopic rack (55). The telescopic rack (55) is disposed on the sliding rod (25). The driven gear (54) is evenly distributed between the racks that are disposed opposite to each other and is rotatably connected to the limiting housing (22). The first handwheel (51) is connected to the driven gear (54). The lifting frame (3) also includes a U-shaped frame (31) and a lifting rod (32). The front end of the U-shaped frame (31) is closed, and the lifting rod (32) is arranged on both sides of the front end of the U-shaped frame (31) in the width direction. The lifting rod (32) extends upward in the vertical direction. The support layer (4) is set inside the U-shaped frame (31), and the two sides of the support layer (4) are detachably connected to the two sides of the U-shaped frame (31) in the width direction; The lifting drive unit includes a second handwheel (33), a gear set (34), a drive shaft (35), a flexible component (36), a lifting gear (37), and a lifting rack (38). The gear set (34) is arranged between adjacent rear support legs (16). The drive shaft (35) is rotatably connected to both sides of the upper connecting frame (11) in the width direction. One end of the drive shaft (35) is connected to the gear set (34), and one end of the drive shaft (35) is wound around one end of the flexible component (36). The other end of the flexible component (36) is connected to the rear end of the U-shaped frame (31). The other end of the drive shaft (35) is connected to the lifting gear (37). The lifting gear (37) meshes with the lifting rack (38). The lifting rack (38) is arranged on the lifting rod (32) along the height direction. The movable receiving cavity is surrounded by a limiting shell (22) and front support legs (21) located on both sides, and the top of the movable receiving cavity is higher than the head of the bed.

3. The medical transfer cart according to claim 2, characterized in that: The limiting housing (22) is rectangular, and sliding openings (24) are formed on both sides of the limiting housing (22). The top of the front support leg (21) is provided with a plug (28) corresponding to the sliding opening (24). The sliding rod (25) is arranged opposite to the adjacent front support legs (21) in the height direction or horizontal direction.

4. The medical transfer cart according to claim 3, characterized in that: The limiting housing (22) is provided with a sliding cavity (23). A movable slide rail (27) is provided between one side of the sliding rod (25) and the sliding cavity (23). The other side of the sliding rod (25) is bent to form a fixing groove (26) for the telescopic rack (55). A bearing mounting hole (56) is provided through the limiting housing (22). A positioning bearing (57) is provided in the bearing mounting hole (56). The outer ring of the positioning bearing (57) is connected to the bearing mounting hole (56). A rotating shaft (53) is provided at the center of the driven gear (54). The rotating shaft (53) extends axially and cooperates with the inner ring of the positioning bearing (57). The outer side of the driven gear (54) meshes with the telescopic rack (55) at the opening position of the fixing groove (26).

5. The medical transfer cart according to claim 4, characterized in that: The limiting housing (22) is provided with a protective housing (52), and a drive gear and a speed-changing gear are provided inside the protective housing (52). The drive gear is connected to a first handwheel (51), which is vertically arranged and does not protrude beyond the orthographic projection range of the limiting housing (22). The top of the drive gear meshes with the speed-changing gear, and the bottom of the speed-changing gear meshes with a telescopic rack.

6. The medical transfer cart according to claim 2, characterized in that: The bottom of the front support leg (21) and the rear support leg (16) are provided with casters (62). The lower part of the front support leg (21) and the rear support leg (16) are inclined inward to form a bent section (61). The distance from the top of the bent section (61) of the front support leg (21) to the bottom of the caster (62) is greater than 10cm, and the distance from the top of the bent section (61) of the rear support leg (16) to the bottom of the caster (62) is less than 35cm.

7. The medical transfer cart according to claim 2, characterized in that: The upper connecting frame (11) includes a front crossbar (12), a rear crossbar (13), a left side bar (14), and a right side bar (15) connected end to end. The front crossbar (12) is provided with a front connecting structure (7) between the left side bar (14) and the right side bar (15). The rear crossbar (13) is provided with a rear connecting structure (8) between the left side bar (14) and the right side bar (15). The rear crossbar (13) is provided with a baffle structure (9) between the rear support legs (16). The baffle structure (9) clamps the rear support legs (16) on both sides. The top of the baffle structure (9) covers the connection positions of the rear crossbar (13) with the left side bar (14) and the right side bar (15) respectively. The gear set (34) is located inside the baffle structure (9). The second handwheel (33) is located at the center of the baffle structure (9). The top of the baffle structure (9) and the crossbar form an observation window (91) for the operator to observe.

8. The medical transfer cart according to claim 7, characterized in that: The front connection structure (7) includes a front connection block (71), a lower housing (74), an upper housing (75), a C-shaped tube (76), and a front opening (73). The front connection block (71) is located at both ends of the front crossbar (12) along its length. The front ends of the left side rod (14) and the right side rod (15) are respectively connected to the corresponding front connection blocks (71). The front connection block (71) has a first through hole (72) for the drive shaft (35) to pass through. The front opening (73) is located at the left side rod (14) and the right side rod (15). On the side of the side rod (15) facing inward, the position of the front opening (73) corresponds to the lifting gear (37), the lower housing (74) is located at the bottom of the front connecting block (71), the upper housing (75) is located at the top of the front connecting block (71), the lifting rod (32) is slidably connected in the C-shaped tube (76), the top of the C-shaped tube (76) is connected to the upper housing (75), the bottom of the C-shaped tube (76) is connected to the lower housing (74), and the C-shaped tube (76) is set towards the front opening (73).

9. The medical transfer cart according to claim 8, characterized in that: The rear connection structure (8) includes a rear connection block (81), a winding disc (83), and a lower opening (84). The rear connection block (81) is located at both ends of the rear crossbar (13) along its length. The top of the rear support leg (16) is connected to the bottom of the rear connection block (81). The ends of the left rod (14) and the right rod (15) are connected to the rear connection block (81). The rear connection block (81) has a second through hole (82) for the drive shaft (35) to pass through. The drive shaft (35) has a winding disc (83) on it. The winding disc (83) is connected to the flexible member (36). The lower opening (84) is located at the bottom of the rear connection block (81) for the flexible member (36) to pass through.

10. The medical transfer cart according to claim 9, characterized in that: The baffle structure (9) covers the connecting block (81) in the thickness direction. The baffle structure (9) has handrails (92) on both sides of the observation window (91). The observation window (91) is in the shape of an inverted triangle and is V-shaped relative to the handrails (92).

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