A lifting device for use with an ambulance stretcher

Abstract

The utility model discloses a lift equipment used with ambulance stretcher, including ambulance, be equipped with stretcher support seat in the ambulance, the below of stretcher support seat is equipped with two pairs of fixed plate, and the fixed plate of one side of upper side is fixedly connected with the bottom of stretcher support seat, and the fixed plate of one side of lower side is fixedly connected with the inner bottom of stretcher support seat, be equipped with protection mechanism between the ambulance and stretcher support seat. The setting of deflection lever can convert the rotary motion of threaded rod into the vertical lifting of stretcher support seat, can according to the height of medical staff or the operation demand of rescue, the stretcher height is adjusted fast, when the mechanical part suddenly breaks down, the damping liquid in the hollow column generates flow resistance through the damping hole of sealing block, forms damping force and delays the falling speed of stretcher support seat, prevents the rapid falling due to gravity, reduces the secondary injury risk of patient.

Description

Technical Field

[0001] This utility model relates to the field of stretcher equipment technology, and in particular to a lifting device used in conjunction with an ambulance stretcher. Background Technology

[0002] In current emergency medical scenarios, the supporting facilities of ambulance stretchers play a crucial role in efficient treatment; with the advancement of medical technology and the increase in emergency needs, higher requirements are placed on the performance of ambulance stretcher lifting equipment.

[0003] Existing lifting devices used with ambulance stretchers are inadequate in the face of sudden mechanical component failures. The existing stretcher support structure cannot effectively cope with such failures, and the stretcher is prone to rapid collapse under gravity, causing secondary injury to the patient. This safety hazard seriously threatens the patient's life during the rescue process. To address these issues, this application proposes a lifting device for use with ambulance stretchers. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a lifting device for use with ambulance stretchers. The deflection rod converts the rotational motion of the threaded rod into the vertical lifting of the stretcher support, allowing for rapid adjustment of the stretcher height according to the height of medical personnel or the needs of the rescue operation. When a mechanical component malfunctions, the damping fluid inside the hollow column generates flow resistance through the damping holes of the sealing block, forming a damping force to slow down the fall speed of the stretcher support, preventing rapid fall due to gravity and reducing the risk of secondary injury to the patient.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lifting device for use with an ambulance stretcher includes an ambulance with a stretcher support seat inside. Two pairs of fixing plates are located below the stretcher support seat. The upper pair of fixing plates is fixedly connected to the bottom of the stretcher support seat, and the lower pair of fixing plates is fixedly connected to the inner bottom of the stretcher support seat. Each fixing plate has a limiting groove, and each limiting groove has a slider that is slidably connected to it. Sliding rods are fixedly connected to the inner walls of the two upper limiting grooves, and each sliding rod passes through and is slidably connected to its corresponding slider. Threaded rods are rotatably connected to the inner walls of the two lower limiting grooves, and each threaded rod passes through and is rotatably connected to its fixing plate. A synchronous belt is fitted onto the outer walls of the two threaded rods, and each threaded rod passes through and is threadedly connected to its corresponding slider. Each slider is rotatably connected to a deflection rod, and each deflection rod is rotatably connected to its corresponding fixing plate. A protective mechanism is provided between the ambulance and the stretcher support seat.

[0007] Preferably, the protection mechanism includes a hollow column fixedly connected to the inner bottom of the ambulance, a sliding column fixedly connected to the bottom of the stretcher support, the sliding column passing through the hollow column and being slidably connected thereto in a sealed manner, a sealing block fixedly connected to the bottom of the sliding column, the sealing block being located inside the hollow column and being slidably connected thereto in a sealed manner, the hollow column being filled with damping fluid, and the sealing block having multiple damping holes through it.

[0008] Preferably, one of the deflecting rods has a through-hole for a rotating groove, and a rotating shaft is fixedly connected to the inner wall of the rotating groove. The rotating shaft passes through the other deflecting rod and is rotatably connected to it.

[0009] Preferably, pulleys are fixedly connected to the outer walls of both threaded rods, the timing belt is sleeved on the outer walls of the two pulleys, and a protective shell is fixedly connected to the two fixing plates on the lower side, the protective shell being sleeved on the outer wall of the timing belt.

[0010] Preferably, a motor is fixedly connected to the side wall of the fixing plate on the lower rear side, and the output end of the motor is rotatably connected to the threaded rod.

[0011] Preferably, the plurality of damping holes are distributed at equal intervals.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. The motor drives the threaded rod to rotate, and the synchronous belt and pulley enable the double threaded rod to rotate synchronously, ensuring that the sliders on both sides slide symmetrically along the limit groove, which drives the deflection rod to form a stable lifting motion; the stretcher height can be quickly adjusted according to the height of medical staff or the needs of rescue operation.

[0014] 2. When a mechanical component suddenly fails, the damping fluid inside the hollow column generates flow resistance through the damping holes of the sealing block, forming a damping force to slow down the fall speed of the stretcher support seat. This passive buffer design requires no additional power and can be automatically triggered in the event of a power outage or mechanical failure, preventing rapid fall due to gravity and reducing the risk of secondary injury to the patient.

[0015] In summary, the deflection rod can convert the rotational motion of the threaded rod into the vertical lifting and lowering of the stretcher support seat, allowing for rapid adjustment of the stretcher height according to the height of medical staff or the needs of the rescue operation. When a mechanical component suddenly malfunctions, the damping fluid inside the hollow column generates flow resistance through the damping hole of the sealing block, forming a damping force to slow down the falling speed of the stretcher support seat, preventing rapid falling due to gravity and reducing the risk of secondary injury to the patient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a lifting device for use with an ambulance stretcher proposed in this utility model;

[0017] Figure 2 This is a first cross-sectional schematic diagram of a lifting device for use with an ambulance stretcher proposed in this utility model;

[0018] Figure 3 This is a second cross-sectional schematic diagram of a lifting device for use with an ambulance stretcher according to the present invention;

[0019] Figure 4 This is a partial structural diagram of a lifting device for use with an ambulance stretcher, as proposed in this utility model.

[0020] In the diagram: 1 Ambulance, 2 Stretcher support, 3 Fixing plate, 4 Limiting groove, 5 Sliding rod, 6 Threaded rod, 7 Sliding block, 8 Deflection rod, 9 Rotating shaft, 10 Synchronous belt, 11 Protective shell, 12 Hollow column, 13 Sliding column, 14 Damping fluid, 15 Sealing block, 16 Damping hole, 17 Motor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4A lifting device for use with an ambulance stretcher includes an ambulance 1. The ambulance 1 contains a stretcher support 2, which is the core load-bearing component of the device and is used to support the stretcher and patient. Two pairs of fixing plates 3 are located below the stretcher support 2. The upper pair of fixing plates 3 are fixedly connected to the bottom of the stretcher support 2, and the lower pair of fixing plates 3 are fixedly connected to the inner bottom of the stretcher support 2. Each fixing plate 3 has a limiting groove 4, and each limiting groove 4 has a slider 7 slidably connected to it. The limiting groove 4 provides guidance and limitation for the sliding of the slider 7, ensuring that the slider 7 moves along a fixed trajectory. Sliding rods 5 are fixedly connected to the inner walls of the two upper limiting grooves 4. The two sliding rods 5 pass through the corresponding sliders 7 and are slidably connected to them, further limiting the sliding direction of the slider 7. To enhance its stability during sliding, threaded rods 6 are rotatably connected to the inner walls of the two limiting grooves 4 on the lower side. A motor 17 is fixedly connected to the side wall of the fixing plate 3 on the lower rear side. The motor 17 is self-locking. The output end of the motor 17 is rotatably connected to the threaded rods 6. Both threaded rods 6 pass through the fixing plate 3 and are rotatably connected to it. A synchronous belt 10 is fitted on the outer wall of the two threaded rods 6. The synchronous belt 10 cooperates with the pulley to realize the synchronous rotation of the two threaded rods 6, ensuring the smooth lifting and lowering of the stretcher support seat 2. Pullers are fixedly connected to the outer walls of the two threaded rods 6. The synchronous belt 10 is fitted on the outer wall of the two pulleys. A protective shell 11 is fixedly connected to the two fixing plates 3 on the lower side. The protective shell 11 is fitted on the outer wall of the synchronous belt 10. The protective shell 11 is used to protect the synchronous belt 10 from external interference and damage.

[0023] Two threaded rods 6 pass through and are threadedly connected to their corresponding sliders 7. The threaded rods 6 have a large thread helix angle (so that when there is no external force driving the motor 17, the threaded rods can rotate freely under the force applied by the sliders 7, and the application of lubricant between the threaded rods 6 and the sliders 7 can reduce friction). The threaded rods 6 drive the sliders 7 to move by rotating. Each slider 7 is rotatably connected to a deflector rod 8. The deflector rod 8 rotates under the drive of the sliders 7, converting the linear motion of the sliders 7 into the lifting motion of the stretcher support 2. Each deflector rod 8 is rotatably connected to its corresponding fixed plate 3. One of the deflector rods 8 has a rotating groove through it. The inner wall of the rotating groove is fixedly connected to a rotating shaft 9. The rotating shaft 9 passes through and is rotatably connected to the other deflector rod 8. The rotating shaft 9 and the rotating groove cooperate to ensure the linkage between the two deflector rods 8, so that the lifting action is coordinated and consistent.

[0024] A protective mechanism is provided between the ambulance 1 and the stretcher support 2. The protective mechanism includes a hollow column 12 fixedly connected to the inner bottom of the ambulance 1. A sliding column 13 is fixedly connected to the bottom of the stretcher support 2. The sliding column 13 passes through the hollow column 12 and is slidably connected to it in a sealed manner. A sealing block 15 is fixedly connected to the bottom of the sliding column 13. The sealing block 15 is located inside the hollow column 12 and is slidably connected to it in a sealed manner. The sealing block 15 ensures the sealing of the damping fluid 14 inside the hollow column 12. At the same time, it generates a damping effect by sliding inside the hollow column 12. The hollow column 12 is filled with damping fluid 14. The damping fluid 14 is the key medium for generating buffer damping force. Multiple damping holes 16 are opened through the sealing block 15. The multiple damping holes 16 are evenly distributed. The damping holes 16 cause the damping fluid 14 to generate flow resistance when the sealing block 15 slides, thereby forming a damping force and realizing the buffer protection of the stretcher support 2.

[0025] In this invention, rescuers place the stretcher on the stretcher support 2 to support the stretcher and the patient. Rescuers can then start the motor 17, which, through its output, drives the rear threaded rod 6, the synchronous belt 10, and the front threaded rod 6 to rotate synchronously. This causes the two lower sliders 7 to slide on the limiting groove 4, thereby rotating the two deflection rods 8. The two deflection rods 8 then rotate synchronously, causing the two upper sliders 7 to slide on the limiting groove 4. This allows for the raising and lowering of the stretcher support 2, supporting the stretcher placed on the stretcher support 2. The height of the stretcher and patient can be adjusted to accommodate medical staff of different heights. When supporting the patient, if the mechanical parts are damaged (the self-locking function of motor 17 is damaged), the stretcher support 2 will fall under the action of gravity. At this time, the stretcher support 2 moves down and drives the sliding column 13 and the sealing block 15 to slide on the hollow column 12. The damping fluid 14 will flow through multiple damping holes 16 to generate damping force, which can buffer and protect the stretcher support 2 from falling, so that the stretcher support 2 can descend smoothly and prevent rapid falling due to gravity.

Claims

1. A lifting device for use with an ambulance stretcher, comprising an ambulance (1), characterized in that, The ambulance (1) is equipped with a stretcher support seat (2). Two pairs of fixing plates (3) are provided below the stretcher support seat (2). The upper pair of fixing plates (3) are fixedly connected to the bottom of the stretcher support seat (2), and the lower pair of fixing plates (3) are fixedly connected to the inner bottom of the stretcher support seat (2). Each fixing plate (3) has a limiting groove (4), and each limiting groove (4) has a slider (7) that is slidably connected to it. The inner walls of the two upper limiting grooves (4) are fixedly connected with sliding rods (5), and the two sliding rods (5) pass through the corresponding sliding rods. The block (7) is slidably connected to it, and the inner walls of the two limiting grooves (4) on the lower side are rotatably connected to threaded rods (6). The two threaded rods (6) pass through the fixing plate (3) and are rotatably connected to it. The outer walls of the two threaded rods (6) are fitted with a synchronous belt (10). The two threaded rods (6) pass through the corresponding sliders (7) and are threadedly connected to them. Each slider (7) is rotatably connected to a deflection rod (8). Each deflection rod (8) is rotatably connected to its corresponding fixing plate (3). A protective mechanism is provided between the ambulance (1) and the stretcher support seat (2).

2. The lifting device for use with an ambulance stretcher according to claim 1, characterized in that, The protective mechanism includes a hollow column (12) fixedly connected to the inner bottom of the ambulance (1), a sliding column (13) fixedly connected to the bottom of the stretcher support (2), the sliding column (13) passing through the hollow column (12) and being slidably connected thereto, a sealing block (15) fixedly connected to the bottom of the sliding column (13), the sealing block (15) being located inside the hollow column (12) and being slidably connected thereto, the hollow column (12) being filled with damping fluid (14), and multiple damping holes (16) being opened through the sealing block (15).

3. The lifting device for use with an ambulance stretcher according to claim 1, characterized in that, One of the deflection rods (8) has a rotating groove through it, and a rotating shaft (9) is fixedly connected to the inner wall of the rotating groove. The rotating shaft (9) passes through the other deflection rod (8) and is rotatably connected to it.

4. A lifting device for use with an ambulance stretcher according to claim 1, characterized in that, Both of the threaded rods (6) are fixedly connected to pulleys on their outer walls. The timing belt (10) is sleeved on the outer walls of the two pulleys. The two fixing plates (3) on the lower side are fixedly connected to a protective shell (11), which is sleeved on the outer wall of the timing belt (10).

5. A lifting device for use with an ambulance stretcher according to claim 1, characterized in that, A motor (17) is fixedly connected to the side wall of the fixing plate (3) on the lower rear side, and the output end of the motor (17) is rotatably connected to the threaded rod (6).

6. A lifting device for use with an ambulance stretcher according to claim 2, characterized in that, The multiple damping holes (16) are distributed at equal intervals.

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