Medical transfer trolley with automatic height fixing function

Abstract

The invention relates to the technical field of medical transfer, and discloses a medical transfer trolley with an automatic height fixing function, which comprises a transfer base, two lifting integrated modules arranged at the top of the transfer base, a transfer bed arranged at the tops of the two lifting integrated modules, and a transfer plate arranged on the transfer bed, a driving mechanism for driving the transfer plate to transfer a patient, a positioning module arranged at the edge of one side of the transfer bed, a control center arranged in the transfer bed, four universal wheels arranged at the bottom of the transfer base and speed reduction units arranged in the universal wheels respectively are arranged in the transfer bed. Through graded braking of the first spring and the second spring, the speed reduction rod acts on the middle portions of the idler wheels to provide basic resistance in the small gradient, the speed reduction rod automatically moves upwards to the outer side to enhance braking force in the large gradient, braking torque is increased along with gradient increasing, downhill acceleration is reduced, sudden stop impact is avoided, and patient transfer safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical transfer, in particular to a medical transfer trolley with automatic height setting function. BACKGROUND

[0002] A medical transfer trolley is a special device for safe and efficient patient transfer in medical institutions, usually composed of an adjustable height bed, a stable base, flexible universal wheels and safety protection devices. Its core functions include precise height adjustment (manual or electric control), smooth mobility and safe fixation of patients, such as anti-skid brakes, foldable guardrails and stretcher guide rail systems, to ensure stable patient position during transfer. Such devices are widely used for patient transfer between different areas of a hospital (such as patient rooms, operating rooms, emergency rooms), and can also be used for inter-hospital transfer of critically ill patients.

[0003] In the field of medical transfer, existing transfer equipment has significant deficiencies in height adaptation and downhill safety control. The height adjustment of traditional medical transfer trolleys relies on manual operation, which requires medical staff to repeatedly compare the height of the bed, taking a long time and with an error of up to 2-5 cm. In particular, in emergency transfer scenarios, operation delays can affect treatment efficiency, and manual adjustment cannot accurately match the height differences of different types of beds (such as ICU beds and general ward beds, which can differ by 10-15 cm in height). In addition, existing transfer trolleys mainly rely on manual foot brakes when going downhill, which has the problems of reaction lag and uncontrollable braking force. The impact force generated during sudden stops can cause pain or secondary injury to patients, especially for patients with fractures or postoperative patients. Traditional brake systems are mostly single mechanical structures and cannot adapt to changes in slope. At small slopes, the braking effect is insufficient, and at large slopes, the braking force is too strong, causing the trolley to lose control. SUMMARY

[0004] In view of the problem that the existing technology is a single mechanical structure and cannot adapt to changes in slope, a medical transfer trolley with automatic height setting function is proposed.

[0005] The purpose is to achieve automatic and precise height setting and intelligent and safe braking of the medical transfer trolley when going downhill, to improve the safety, efficiency and adaptability to different medical scenarios during transfer, and to reduce the operational burden of medical staff.

[0006] The technical scheme of the present application is a medical transfer trolley with automatic height setting function, comprising a transfer base, two lifting integrated modules arranged on the top of the transfer base, a transfer bed arranged on the top of the two lifting integrated modules, a transfer plate arranged on the transfer bed, a drive mechanism arranged inside the transfer bed for driving the transfer plate to transfer patients, a positioning module arranged at the side edge of the transfer bed, a control center arranged inside the transfer bed, and four universal wheels arranged at the bottom of the transfer base, further comprising a speed reduction unit arranged in each universal wheel; The universal wheel comprises a mounting seat arranged at the corner of the transfer base, a rotating column arranged at the bottom of the mounting seat, and two rollers arranged at the bottom of the rotating column and connected by a rotating shaft; The speed reduction unit comprises a trigger assembly arranged on one side of the rotating column, and a speed reduction assembly arranged on one side of the trigger assembly; the trigger assembly comprises a support plate arranged on one side of the rotating column, and a counterweight plate arranged at the bottom of the support plate; The speed reduction assembly comprises an extrusion block arranged at the bottom of the inner cavity of the rotating column, two speed reduction rods symmetrically arranged inside the extrusion block, and an extrusion rod arranged at the middle of the two speed reduction rods, the extrusion rod penetrating through the connection between the two speed reduction rods and extending to the outside of the extrusion block.

[0007] Further, the counterweight plate is in the shape of an inclined triangle, the counterweight plate is asymmetrically arranged about the central axis at the top thereof, and the two sides at the bottom of the counterweight plate are in the shape of a circular arc.

[0008] Further, the speed reduction assembly further comprises a mounting groove opened on one side of the inner cavity of the extrusion block, a spring one arranged in the mounting groove, an inclined rod symmetrically arranged on both sides of the extrusion rod, a limiting rod arranged on one side of the inclined rod, an inclined surface respectively opened on one side of the two speed reduction rods, a limiting groove opened on the inclined surface, the limiting rod being slidingly connected inside the limiting groove, and a moving hole symmetrically opened on both sides of the rotating column for the movement of the speed reduction rod, and the two extrusion rods penetrating through the moving hole and extending to the outside of the rotating column.

[0009] Further, one end of the extrusion rod close to the counterweight plate is in an inclined shape.

[0010] Further, the bottom of the extrusion block is provided with an arc surface for extrusion of the counterweight plate, the top of the extrusion block is provided with a spring two, a baffle arranged at the top of the spring two, and the baffle is arranged inside the rotating column.

[0011] Further, the two rollers are respectively provided with a speed reduction groove on the side facing each other, and the speed reduction groove is in the shape of a smooth recess.

[0012] Further, one end of the speed reduction rod for extrusion friction is made of ceramic material, which is composed of ceramic particles, aramid fiber and resin, and the material of the counterweight plate is high-density alloy.

[0013] Further, when the transfer trolley is in a horizontal state on the flat ground, the counterweight plate does not press the extrusion rod, and when the transfer trolley is in a downhill state, the counterweight plate starts to push the extrusion rod.

[0014] Compared with the prior art, the present application has the following beneficial effects: 1. When transferring downhill, the extrusion block is pushed by the counterweight plate, and after the extrusion block is extruded, the two speed reduction rods are extended, one end of the speed reduction rod extrudes the side of the roller, realizes automatic resistance increase when downhill, and inhibits the risk of inertia, without power driving, only through the gravity of the counterweight plate to trigger the speed reduction mechanism, automatically starts when downhill, avoids the delay problem of manual operation of traditional brakes, and is especially suitable for emergency braking demand of medical staff when pushing the trolley with one hand.

[0015] 2. The height of the transfer bed and the sick bed is monitored in real time by the laser ranging sensor, the height error is reduced, the efficiency is effectively improved compared with the traditional manual adjustment, the transfer risk caused by height deviation is avoided, especially suitable for emergency rescue scene, and the docking time is shortened.

[0016] 3. The speed reduction rod acts on the middle part of the roller to provide basic resistance at a small slope, and automatically moves to the outside to enhance the braking force at a large slope, the braking torque increases with the increase of the slope, the downhill acceleration is reduced, the sudden stop impact is avoided, and the patient transfer safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the transfer trolley of the present application; Figure 2 It is a schematic diagram of the overall structure of the universal wheel of the present application; Figure 3 It is a schematic diagram of the overall front cross-sectional structure of the universal wheel of the present application; Figure 4 It is a schematic diagram of the overall appearance structure of the speed reduction unit of the present application; Figure 5 It is a schematic diagram of the overall structure of the speed reduction unit when the transfer trolley is in a horizontal state; Figure 6 It is a schematic diagram of the overall structure of the speed reduction unit when the transfer trolley is in a downhill inclined state; Figure 7 It is an exploded view schematic diagram of the internal structure of the extrusion block of the present application; Figure 8 It is a schematic diagram of the overall structure of the speed reduction assembly of the present application; Figure 9 It is a schematic diagram of the structure of the mounting groove of the present application; Figure 10 It is a schematic diagram of the three-dimensional structure of the speed reduction groove of the present application; Figure 11The overall structure diagram of the transport trolley downhill of the present application; Figure 12 The overall structure diagram of the transport trolley uphill of the present application.

[0018] In the figure: 1, transport base; 11, lifting integrated module; 12, transport bed; 13, transport plate; 2, universal wheel; 21, mounting seat; 22, rotating column; 23, roller; 3, trigger assembly; 31, support plate; 32, counterweight plate; 4, deceleration assembly; 41, extrusion block; 42, deceleration rod; 43, extrusion rod; 44, mounting groove; 45, spring one; 46, inclined rod; 47, limiting rod; 48, inclined surface; 49, limiting groove; 50, moving hole; 51, arc surface; 52, spring two; 6, deceleration groove. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0020] Reference Figures 1-12The application provides a medical transfer trolley with an automatic height setting function, which comprises a transfer base 1, two lifting integrated modules 11 installed on the top of the transfer base 1, the lifting integrated module 11 being composed of a motor, a plurality of vertically sliding sleeve-connected support steel columns and the like, a transfer bed 12 installed on the top of the two lifting integrated modules 11 and used for realizing the lifting function of the transfer bed 12, a transfer plate 13 installed on the transfer bed 12, a driving mechanism installed in the transfer bed 12 and used for driving the transfer plate 13 to transfer a patient, the driving mechanism also being composed of a motor and various parts for realizing the telescopic function of the transfer plate 13, a positioning module installed at the side edge of the transfer bed 12, a control center arranged in the transfer bed 12, the positioning module being composed of a plurality of laser ranging sensors and used for detecting whether the height of the transfer bed 12 is consistent with the height of a sickbed, when the laser ranging sensor detects that the transfer bed 12 has reached the same height as the sickbed edge, an instruction is sent to the control center at this time, the control center sends a stop lifting instruction to the lifting integrated module 11 after receiving the instruction, the lifting integrated module 11 automatically stops rising, and the automatic height setting function of the medical transfer trolley is realized, at this time, the driving mechanism drives the transfer plate 13 to move to the sickbed, after the patient is transferred to the transfer plate 13, the driving mechanism moves back to the transfer plate 13, the transfer of the patient is realized, or the process is reversed, the patient is transferred to the sickbed, and four universal wheels 2 are installed at the bottom of the transfer base 1, a foot brake is installed at the top of each universal wheel 2 (which can be used to lock the universal wheel 2 and improve the stability during the transfer process, prior art, the specific implementation structure is not shown in the figure), and a speed reduction unit is respectively installed in each universal wheel 2; the universal wheel 2 comprises a mounting seat 21 installed at the corner of the transfer base 1, a rotating column 22 rotatably installed at the bottom of the mounting seat 21, and two rollers 23 rotatably connected through a rotating shaft and installed at the bottom of the rotating column 22; the speed reduction unit comprises a trigger assembly 3 installed on one side of the rotating column 22 and a speed reduction assembly 4 installed on one side of the trigger assembly 3; the trigger assembly 3 comprises a support plate 31 fixedly connected on one side of the rotating column 22 and a counterweight plate 32 rotatably connected at the bottom of the support plate 31; the speed reduction assembly 4 comprises an extrusion block 41 slidingly connected at the bottom of the inner cavity of the rotating column 22, two speed reduction rods 42 symmetrically slidingly connected in the inner part of the extrusion block 41, and an extrusion rod 43 movably connected in the middle part of the two speed reduction rods 42, the extrusion rod 43 penetrating through the connection part of the two speed reduction rods 42 and extending to the outside of the extrusion block 41.

[0021] Specifically, during transportation, it is usually necessary to push the transfer trolley uphill and downhill. During downhill, due to the inertia of the transfer trolley, the speed of the transfer trolley tends to increase, affecting the safety and stability of the patient during the transfer process. When transferring downhill, the four universal wheels 2 are in the same direction downward, and due to the influence of the slope, the transfer trolley as a whole is in an inclined state, while the counterweight plate 32 always maintains a vertical state under the action of gravity. At this time, the counterweight plate 32 will push the extrusion block 41, and the extrusion block 41 will be extruded to push the two speed reduction rods 42 to extend, and one end of the speed reduction rod 42 will extrude the side of the roller 23 to achieve automatic resistance increase when downhill, and the effect of suppressing inertia risk. It does not need to be driven by electricity, but only triggers the speed reduction mechanism by the gravity of the counterweight plate 32, which automatically starts when downhill, avoiding the delay problem of manual operation of traditional brakes, especially suitable for emergency braking needs when medical staff pushes the trolley with one hand. And the speed reduction rod 42 realizes friction resistance increase by extruding the edge of the roller 23, rather than directly locking, which reduces the impact force generated by the patient due to sudden stop when downhill, and improves the safety performance of the transfer. In addition, when transferring uphill, the running direction of the transfer trolley is obliquely upward, and the counterweight plate 32 also remains vertical. The counterweight plate 32 does not extrude the extrusion rod 43, which does not affect the uphill transfer.

[0022] Referring to Figures 5-6 , the counterweight plate 32 is in an inclined triangular shape, and the counterweight plate 32 is asymmetrically arranged about the central axis of the top thereof, and the two sides of the bottom of the counterweight plate 32 are in a circular arc shape.

[0023] Specifically, the asymmetrically inclined arrangement of the counterweight plate 32 offsets its center of gravity, facilitating the counterweight plate 32 to exert greater extrusion force on the extrusion rod 43, enhancing the extrusion and friction effect of the speed reduction rod 42 on the inner wall of the roller 23, achieving the effect of resistance increase and speed reduction when the transfer trolley goes downhill, improving the safety during the transfer process, and more easily overcoming the resistance of the rotating column 22 when downhill, which can reduce the required inclination angle and improve the speed reduction response capability in low slope scenarios.

[0024] Referring to Figures 7-9 , the speed reduction assembly 4 further comprises a mounting groove 44 opened in one side of the inner cavity of the extrusion block 41, a spring 45 fixedly connected in the mounting groove 44, an inclined rod 46 fixedly connected on both sides of the extrusion rod 43, a limiting rod 47 fixedly connected on one side of the inclined rod 46, an inclined surface 48 respectively opened on one side of the two speed reduction rods 42, a limiting groove 49 opened on the inclined surface 48, the limiting rod 47 being slidingly connected in the limiting groove 49, and a moving hole 50 symmetrically opened on both sides of the rotating column 22 for the movement of the speed reduction rod 42, and the two extrusion rods 43 passing through the moving hole 50 and extending to the outside of the rotating column 22.

[0025] Specifically, when the pressing rod 43 is pressed, one end of the pressing rod 43 will compress the spring, and drive the two sides of the inclined rod 46 and the limiting rod 47 to move synchronously, the limiting rod 47 slides in the limiting groove 49, so that the two sides of the speed reducer 42 extend outward, thereby frictionally reducing the roller 23.

[0026] Referring to Figure 8 , one end of the pressing rod 43 close to the counterweight plate 32 is inclined.

[0027] Specifically, the counterweight plate 32 is pressed, so that the pressing rod 43 can be completely retracted into the pressing block 41, facilitating subsequent pressing of the pressing block 41.

[0028] Referring to Figures 7-9 , the bottom of the pressing block 41 is provided with an arc surface 51 for pressing the counterweight plate 32, and the top of the pressing block 41 is fixedly connected with a spring 52, and the baffle fixedly connected at the top of the spring 52 is fixedly connected inside the rotating column 22.

[0029] Specifically, the spring 52 has a larger elastic coefficient than the spring 45, when the counterweight plate 32 starts to push the pressing rod 43, at this time, the spring 45 and the spring 52 are both stressed, the deformation of the spring 45 is large, and the deformation of the spring 52 is small, when the pressing rod 43 is completely pressed and retracted into the pressing block 41, at this time, the speed reducer 42 has already frictionally reduced the roller 23, if the counterweight plate 32 continues to press (i.e. the greater the slope of the downhill, the greater the component force of the weight of the counterweight plate, the greater the pressing force of the pressing block), at this time, the counterweight plate 32 will push the arc surface 51, so that the pressing block 41 moves upward, the spring 52 is compressed, and the two sides of the speed reducer 42 move upward synchronously along the moving hole 50. In this process, the speed is reduced in stages, when the slope is small, the spring 45 dominates the deformation, the speed reducer 42 extends to the middle of the roller 23, providing basic friction resistance, when the slope is large, the arc surface 51 of the counterweight plate 32 pushes the pressing block 41 to move upward, the spring 52 is compressed, and the speed reducer 42 moves to the outside of the roller 23, enhancing the braking friction, and the spring 45 can be completely retracted into the pressing block 41, avoiding excessive pressing of the pressing rod 43 by the counterweight plate 32 at a large slope, causing damage to the spring 45, and improving the service life of the spring 45.

[0030] Referring to Figure 10 , the two rollers 23 are provided with speed reduction grooves 6 on the opposite sides, and the speed reduction grooves 6 are smooth concave.

[0031] Specifically, since the deceleration groove 6 is smooth and concave, when the deceleration rod 42 moves from the middle part of the deceleration groove 6 to the outside, the end of the deceleration rod 42 is closer and closer to the roller 23, that is, when the slope is greater, the counterweight plate 32 is pressed to make the pressing block 41 drive the two sides of the deceleration rod 42 to move upward as a whole, further increase the friction resistance, and improve the safety and stability of the patient during steep slope transfer.

[0032] Among them, one end of the deceleration rod 42 for pressing friction is ceramic material, which is composed of ceramic particles, aramid fiber and resin, and the material of the counterweight plate 32 is high-density alloy.

[0033] Specifically, the ceramic particles are used to provide strong wear resistance, the aramid fiber enhances toughness, avoids ceramic brittle fracture, and the resin matrix fills the pores, which can stabilize the friction coefficient, and the overall service life of the deceleration rod 42 is improved. The high-density material has large inertia and is not easily affected by the shaking of the cart (such as bumps when passing through the threshold), and is only triggered when the continuous downhill slope is triggered, reducing the probability of false braking.

[0034] Referring to Figures 5-6 When the transfer trolley is in a horizontal state on the flat ground, the counterweight plate 32 does not press the pressing rod 43, and when the transfer trolley is in a downhill state, the counterweight plate 32 starts to push the pressing rod 43.

[0035] Specifically, in the non-downhill state, there is no friction loss, the ceramic end is separated from the roller 23, and the setting of the counterweight plate 32 can also improve the stability of the whole transfer trolley during the pushing process (such as thresholds, pits, etc.).

[0036] The working principle of the present application: intelligent and safe transfer is realized through multi-module cooperation. The automatic height setting function relies on the laser ranging sensor to compare the height of the transfer bed 12 and the patient bed in real time, and when the same level is reached, the control center instructs the lifting integrated module 11 to stop, ensuring that the transfer plate 13 is accurately docked, avoiding the error and time-consuming of manual adjustment. The universal wheel 2 is equipped with a pure mechanical deceleration unit, and when the transfer trolley is inclined downhill, the counterweight plate 32 remains vertical due to its own weight, pushing the pressing block 41 to make the ceramic deceleration rod 42 extend to press the edge of the roller 23, and the friction increases the resistance to inhibit the speed. The asymmetric structure of the counterweight plate 32 reduces the triggering slope, and the spring one 45 and the spring two 52 are staged braking; at small slope, spring one 45 dominates, and deceleration rod 42 acts on the middle part of roller 23; at large slope, spring two 52 is compressed, and deceleration rod 42 moves to the outside of roller 23 to enhance the braking force. The whole system does not need electricity, the gravity-driven response is sensitive, there is no wear on the flat ground, and the transfer efficiency and patient safety are considered, which significantly improves the operation reliability in medical scenes.

[0037] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A medical transport vehicle with automatic height control function, comprising a transport base (1), two lifting integrated modules (11) disposed on the top of the transport base (1), a transport bed (12) disposed on the top of the two lifting integrated modules (11), a transport plate (13) disposed on the transport bed (12), a drive mechanism for driving the transport plate (13) to transport patients disposed inside the transport bed (12), a positioning module disposed on one side edge of the transport bed (12), a control center disposed inside the transport bed (12), and four casters (2) disposed at the bottom of the transport base (1), characterized in that: It also includes a reduction unit disposed within the caster wheel (2); The universal wheel (2) includes a mounting base (21) located at the corner of the transfer base (1), a rotating column (22) located at the bottom of the mounting base (21), and two rollers (23) located at the bottom of the rotating column (22) and rotatably connected by a rotating shaft. The deceleration unit includes a trigger assembly (3) disposed on one side of the rotating column (22) and a deceleration assembly (4) disposed on one side of the trigger assembly (3); the trigger assembly (3) includes a support plate (31) disposed on one side of the rotating column (22) and a counterweight plate (32) disposed at the bottom of the support plate (31). The deceleration assembly (4) includes a pressing block (41) disposed at the bottom of the inner cavity of the rotating column (22), two deceleration rods (42) symmetrically disposed inside the pressing block (41), and a pressing rod (43) disposed in the middle of the two deceleration rods (42). The pressing rod (43) passes through the connection of the two deceleration rods (42) and extends to the outside of the pressing block (41).

2. The medical transport vehicle with automatic height control function according to claim 1, characterized in that: The counterweight plate (32) is in the shape of an oblique triangle. The counterweight plate (32) is asymmetrically arranged about the central axis of its top, and the two sides of the bottom of the counterweight plate (32) are arc-shaped.

3. The medical transport vehicle with automatic height control function according to claim 2, characterized in that: The deceleration assembly (4) also includes an installation groove (44) opened on one side of the inner cavity of the extrusion block (41), a spring (45) set in the installation groove (44), inclined rods (46) symmetrically arranged on both sides of the extrusion rod (43), a limiting rod (47) set on one side of the inclined rod (46), inclined surfaces (48) respectively opened on the opposite side of the two deceleration rods (42), a limiting groove (49) opened on the inclined surface (48), the limiting rod (47) is slidably connected inside the limiting groove (49), and moving holes (50) symmetrically opened on both sides of the rotating column (22) for the deceleration rods (42) to move, and both extrusion rods (43) pass through the moving holes (50) and extend to the outside of the rotating column (22).

4. The medical transport vehicle with automatic height control function according to claim 3, characterized in that: The end of the compression rod (43) near the counterweight plate (32) is inclined.

5. The medical transport vehicle with automatic height control function according to claim 1, characterized in that: The bottom of the extrusion block (41) is provided with an arc surface (51) for the counterweight plate (32) to press. The top of the extrusion block (41) is provided with a second spring (52) and a baffle is provided on the top of the second spring (52). The baffle is located inside the rotating column (22).

6. The medical transport vehicle with automatic height control function according to claim 1, characterized in that: The two rollers (23) are provided with deceleration grooves (6) on opposite sides, and the deceleration grooves (6) are smooth concave.

7. The medical transport vehicle with automatic height control function according to claim 3, characterized in that: The deceleration lever (42) is made of ceramic material at one end for extrusion friction. It is composed of ceramic particles, aramid fibers and resin. The counterweight plate (32) is made of high-density alloy.

8. The medical transport vehicle with automatic height control function according to claim 1, characterized in that: When the transport vehicle is on flat ground and in a horizontal state, the counterweight plate (32) does not press the compression rod (43). When the transport vehicle is on a downhill state, the counterweight plate (32) begins to push the compression rod (43).

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