Helicopter stretcher rescue device

Abstract

The utility model belongs to the technical field of helicopter rescue, and particularly relates to a helicopter stretcher rescue device. Power units are arranged in the front-back direction of the rectangular opening; the power unit is fixed on a helicopter floor, and the lower end of the power unit is connected with the ambulance stretcher to drive the ambulance stretcher to be put down and put on the helicopter. The power unit comprises a motor, a transverse shaft bevel gear, a motor bevel gear, a transverse shaft, a transverse shaft support, a main steel cable and a side steel cable; the transverse shaft supports are arranged on the two sides of the long edge of the rectangular opening. A bearing is arranged in the transverse shaft support and used for connecting and supporting the transverse shaft. A motor is fixed in the middle of the short edge of the rectangular opening, and a motor bevel gear is connected to an output shaft of the motor; the motor bevel gear is meshed with the transverse shaft bevel gear; the upper end of the main steel cable is connected and wound on the output shaft of the motor; and the lower ends of the side steel cables are connected with the long edges of the ambulance stretcher.

Description

Technical Field

[0001] This utility model belongs to the field of helicopter rescue technology, and specifically relates to a helicopter stretcher rescue device. Background Technology

[0002] Helicopters, as aircraft capable of vertical ascent and descent, are widely used in various industries such as agriculture, forestry, fisheries, sideline production, animal husbandry, rescue, tourism, sightseeing, and military. Especially in the field of medical evacuation, helicopters, with their excellent flight characteristics, suitable carrying capacity, and rapid arrival, have become the most suitable air ambulances. Currently, there are two main methods for helicopter evacuation of seriously injured patients: the first is to use a stretcher to lift the seriously injured patient onto the helicopter after a smooth landing; the second is to use an externally sling-mounted stretcher to transport the seriously injured patient to the destination before providing medical care. The first method has high requirements for the evacuation site and is suitable for urban areas with take-off and landing platforms and large, hard, flat outdoor areas. While the second method offers faster transport and has fewer terrain requirements, it cannot provide timely treatment for seriously injured patients. Utility Model Content

[0003] Purpose of the utility model: To provide a helicopter stretcher rescue device that integrates the stretcher into the helicopter, with a liftable stretcher installed in the helicopter's passenger and cargo cabin. This not only allows for fast transportation but also requires minimal terrain conditions and enables immediate treatment of seriously injured individuals.

[0004] Technical solution

[0005] A helicopter stretcher rescue device includes: a motor controller, two power units, and a rescue stretcher;

[0006] A rectangular opening is located in the center of the helicopter floor;

[0007] A set of power units is installed in the front and rear directions of the rectangular opening; the power units are fixed to the helicopter floor, and the lower end of the power units is connected to the medical stretcher, which is used to drive the medical stretcher to be lowered and retracted into the helicopter.

[0008] Furthermore, the power unit includes: a motor, a horizontal shaft bevel gear, a motor bevel gear, a horizontal shaft, a horizontal shaft support, a main steel cable, and side steel cables;

[0009] The horizontal shaft support is set on both sides of the long side of the rectangular opening; the horizontal shaft support is equipped with bearings for connecting and supporting the horizontal shaft;

[0010] The motor is fixed in the middle of the short side of the rectangular opening. The motor output shaft is connected to the motor bevel gear, and the horizontal shaft is connected to the horizontal shaft bevel gear; the motor bevel gear and the horizontal shaft bevel gear mesh.

[0011] The upper end of the main steel cable is connected to and wound around the motor output shaft, and the lower end is connected to the middle of the short side of the ambulance stretcher.

[0012] The upper end of the side steel cable is connected to and wrapped around the horizontal axis, and the lower end is connected to the long edge of the ambulance stretcher.

[0013] Furthermore, the device also includes an anti-sway frame;

[0014] The anti-sway frame is made up of multiple X-shaped scissor assemblies hinged end to end. Each X-shaped scissor assembly is made up of two metal strips of the same size hinged at the midpoint.

[0015] The lower end of the anti-sway frame is hinged to the ambulance stretcher, and the upper end is hinged to the side wall of the helicopter floor.

[0016] Furthermore, there are four sets of anti-sway frames, with each steel cable working in conjunction with one set of anti-sway frames;

[0017] Two sets of anti-sway frames are installed in the middle of the two short sides of the ambulance stretcher as lateral anti-sway frames; the other two sets of anti-sway frames are installed at both ends of one long side of the ambulance stretcher as longitudinal anti-sway frames.

[0018] Furthermore, the ambulance stretcher is equipped with anti-sway guard grooves at both ends along its length;

[0019] Both the anti-sway frame and the steel cable are installed inside the anti-sway frame's protective groove.

[0020] Furthermore, the rescue unit has openings in the middle of its two long sides;

[0021] A side guard bar is installed at the opening, and a side guard rope net is connected between the side guard bar and the ambulance stretcher; the side wall of the anti-sway frame protective groove is equipped with a retaining ring;

[0022] When lifting the injured person, remove the side protective crossbar. After the injured person is lifted onto the rescue stretcher, insert the side protective crossbar into the retaining ring on the anti-sway frame to fix the side protective crossbar.

[0023] Furthermore, the side wall of the ambulance stretcher is provided with a clearance groove to avoid the horizontal axis and the motor output shaft.

[0024] In summary, the beneficial effects of this utility model are as follows:

[0025] (1) This utility model fills the gap in the current field of helicopter rescue by adding a simple helicopter stretcher structure;

[0026] (2) This utility model solves the inherent swaying problem of helicopter hoisting through synchronous transmission structure and anti-sway structure in two directions, and realizes the smooth raising and lowering of the rescue stretcher. The structure is simple and reliable, with good stability and strong practicality.

[0027] (3) This utility model has low manufacturing complexity, simple assembly method, clear and easy-to-understand usage logic, small size and light weight, and good economic efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a helicopter stretcher rescue device. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0030] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] A helicopter stretcher rescue device mainly consists of: a motor 1, a horizontal bevel gear 2, a rectangular opening in the helicopter floor 3, a motor bevel gear 4, a horizontal anti-sway frame 5, a retaining ring 6, an anti-sway frame protective groove 7, a rescue stretcher 8, a rescue stretcher side protective rope net 9, a rescue stretcher side protective crossbar 10, an avoidance groove 11, a longitudinal anti-sway frame 12, a horizontal shaft 13, a steel cable 14, a horizontal shaft support 15, and a motor controller 16.

[0033] System device composition and main functions:

[0034] (1) The device consists of two parts: the part above the helicopter floor and the part below the floor. Except for the motor controller 16, the device has a front-to-back symmetrical structure.

[0035] (2) The rectangular opening 3 of the helicopter floor is opened in the center of the helicopter floor. Its size is slightly larger than the outer contour size of the ambulance stretcher 8, so as to ensure that the ambulance stretcher 8 can be raised from the rectangular opening 3 of the helicopter floor without leaving too large a gap.

[0036] (3) Above the helicopter floor, a motor 1, a horizontal bevel gear 2, a motor bevel gear 4, a horizontal shaft 13, a horizontal shaft support 15, and a motor controller 16 are installed. The motor 1 is located at the middle of the front and rear ends of the rectangular opening 3 of the helicopter floor. The output shaft of the motor 1 drives the motor bevel gear 4, which has the same parameters as the horizontal bevel gear 2 and meshes with it. The horizontal bevel gear 2 is fixed on the horizontal shaft 13 and rotates around the horizontal shaft 13. The two ends of the horizontal shaft 13 are hinged and limited on the horizontal shaft supports 15 on both sides of the rectangular opening 3 of the helicopter floor. The output shaft of the motor 1 is responsible for winding and releasing the steel cable 14 in the middle of the transverse anti-sway frame 5, and the horizontal shaft 13 is responsible for winding and releasing the steel cable 14 in the middle of the longitudinal anti-sway frame 12. The lowest end of the steel cable 14 is connected to the ambulance stretcher 8 to realize the raising and lowering of the ambulance stretcher 8.

[0037] (4) The anti-sway frame is composed of multiple X-shaped scissor assemblies hinged end to end. Each X-shaped scissor assembly is made of two metal strips of the same size hinged at the midpoint. The bottom end of the anti-sway frame is hinged to the anti-sway frame protective groove 7 of the ambulance stretcher 8, and the top end of the anti-sway frame is hinged to the front and rear side walls of the helicopter floor. The steel cable 14 is arranged in the middle of the anti-sway frame and is close to the anti-sway frame. The X-shaped scissor assembly of the anti-sway frame utilizes the principle of stability of triangles, which can effectively prevent the ambulance stretcher 8 from swaying along the direction of the anti-sway frame.

[0038] (5) However, since the anti-sway frame can only prevent swaying in one direction, two anti-sway frames in different directions are set on each side of the ambulance stretcher 8. The transverse anti-sway frame 5 is arranged laterally, and the longitudinal anti-sway frame 12 is arranged longitudinally. The combined effect of the transverse anti-sway frame 5 and the longitudinal anti-sway frame 12 prevents the ambulance stretcher 8 from swaying.

[0039] (6) The connection points of the transverse anti-sway frame 5, the longitudinal anti-sway frame 12, the steel cable 14 and the rescue stretcher 8 are all in the anti-sway frame protective grooves 7 on the front and rear sides of the rescue stretcher 8. The purpose is to protect the injured and prevent the injured from touching these moving parts.

[0040] (7) The left and right sides of the rescue stretcher 8 are equipped with rescue stretcher side protective rope nets 9. The rescue stretcher side protective rope nets 9 are soft net structures. Their lower ends are connected to the left and right sides of the rescue stretcher 8, and their upper ends are connected to the rescue stretcher side protective crossbars 10. When it is necessary to lift the injured person into the rescue stretcher 8, the rescue stretcher side protective rope nets 9 are lowered. After the injured person is lifted into the rescue stretcher 8, before the rescue stretcher 8 needs to be raised, the two ends of the rescue stretcher side protective crossbars 10 need to be inserted into the locking rings 6 set on the anti-sway frame protective grooves 7 on both sides to protect the safety of the injured person in the air.

[0041] (8) The motor controller 16 controls the synchronous rotation of the two motors 1 to ensure the horizontal lifting and lowering of the ambulance stretcher 8. The output shaft of motor 1 is responsible for winding and releasing the steel cable 14 in the middle of the transverse anti-sway frame 5, and the transverse shaft 13 is responsible for winding and releasing the steel cable 14 in the middle of the longitudinal anti-sway frame 12. When the steel cable 14 is wound, the ambulance stretcher 8 rises. When the steel cable 14 is released, the ambulance stretcher 8 lowers.

[0042] (9) A clearance groove 11 is provided on the anti-sway frame protective groove 7 corresponding to the position of the output shaft of motor 1 and the horizontal shaft 13, so as to ensure that the bottom of the rescue stretcher 8 can be raised to the same level as the bottom of the helicopter floor, so as not to cause interference between the anti-sway frame protective groove 7 and the output shaft of motor 1 and the horizontal shaft 13.

[0043] System operation process

[0044] (1) When it is necessary to lower the rescue stretcher 8, the motor controller 16 controls the two motors 1 to rotate synchronously to ensure that the rescue stretcher 8 is lowered horizontally.

[0045] (2) The output shaft of motor 1 drives the motor bevel gear 4 to rotate, the motor bevel gear 4 meshes with the horizontal shaft bevel gear 2 to rotate, and the horizontal shaft bevel gear 2 coaxially drives the horizontal shaft 13 to rotate.

[0046] (3) The output shaft of motor 1 is responsible for releasing the steel cable 14 in the middle of the transverse anti-sway frame 5, and the transverse shaft 13 is responsible for releasing the steel cable 14 in the middle of the longitudinal anti-sway frame 12. When the steel cable 14 is released, the ambulance stretcher 8 descends.

[0047] (4) During the descent of the ambulance stretcher 8, the X-shaped scissor assembly of the anti-sway frame utilizes the stability principle of a triangle to effectively prevent the ambulance stretcher 8 from swaying along the direction of the anti-sway frame's expansion. Since the anti-sway frame can only prevent swaying in one direction, two anti-sway frames with different expansion directions are set on each side of the ambulance stretcher 8: a transverse anti-sway frame 5 and a longitudinal anti-sway frame 12. The combined effect of the transverse anti-sway frame 5 and the longitudinal anti-sway frame 12 prevents the ambulance stretcher 8 from swaying.

[0048] (5) After the rescue stretcher 8 is lowered to the required height, the motor controller 16 controls the two motors 1 to stop rotating synchronously, and the rescue stretcher 8 stops at the required height.

[0049] (6) When it is necessary to lift the injured person into the rescue stretcher 8, the protective rope net 9 on the side of the rescue stretcher is lowered. After the injured person is lifted into the rescue stretcher 8, before the rescue stretcher 8 needs to be raised, the two ends of the protective crossbar 10 on the side of the rescue stretcher should be inserted into the locking rings 6 set on the protective grooves 7 of the anti-sway frame on both sides to protect the safety of the injured person in the air.

[0050] (7) The process of the rescue stretcher 8 rising is the opposite of the process of falling.

[0051] Key features of this utility model:

[0052] (1) The rectangular opening 3 of the helicopter floor is opened in the center of the helicopter floor, and its size is slightly larger than the outer contour size of the ambulance stretcher 8.

[0053] (2) The motor bevel gear 4 and the horizontal shaft bevel gear 2 have the same parameters and mesh with each other.

[0054] (3) The anti-sway frame is composed of multiple X-shaped scissor assemblies hinged end to end. Each X-shaped scissor assembly is made of two metal strips of the same size hinged at the midpoint. The X-shaped scissor assembly of the anti-sway frame utilizes the principle of stability of triangles, which can effectively prevent the ambulance stretcher 8 from swaying along the direction of the anti-sway frame.

[0055] (4) Since the anti-sway frame can only prevent swaying in one direction, two anti-sway frames with different expansion directions are installed on each side of the ambulance stretcher 8.

[0056] (5) Before raising the rescue stretcher 8, the two ends of the side protective crossbar 10 of the rescue stretcher should be inserted into the retaining rings 6 set on the protective grooves 7 of the anti-sway frame on both sides to protect the safety of the injured in the air.

[0057] (6) The motor controller 16 controls the synchronous rotation of the two motors 1 to ensure the horizontal lifting and lowering of the ambulance stretcher 8. The output shaft of motor 1 is responsible for winding and releasing the steel cable 14 in the middle of the transverse anti-sway frame 5, and the transverse shaft 13 is responsible for winding and releasing the steel cable 14 in the middle of the longitudinal anti-sway frame 12. When the steel cable 14 is wound, the ambulance stretcher 8 rises. When the steel cable 14 is released, the ambulance stretcher 8 lowers.

[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A helicopter stretcher rescue device, characterized in that: include: Motor controller, two power units, and ambulance stretcher; A rectangular opening is located in the center of the helicopter floor; A set of power units is installed in the front and rear directions of the rectangular opening; the power units are fixed to the helicopter floor, and the lower end of the power units is connected to the medical stretcher, which is used to drive the medical stretcher to be lowered and retracted into the helicopter.

2. The apparatus according to claim 1, characterized in that: The power unit includes: a motor, a horizontal shaft bevel gear, a motor bevel gear, a horizontal shaft, a horizontal shaft support, a main steel cable, and side steel cables; The horizontal shaft support is set on both sides of the long side of the rectangular opening; the horizontal shaft support is equipped with bearings for connecting and supporting the horizontal shaft; The motor is fixed in the middle of the short side of the rectangular opening. The motor output shaft is connected to the motor bevel gear, and the horizontal shaft is connected to the horizontal shaft bevel gear; the motor bevel gear and the horizontal shaft bevel gear mesh. The upper end of the main steel cable is connected to and wound around the motor output shaft, and the lower end is connected to the middle of the short side of the ambulance stretcher. The upper end of the side steel cable is connected to and wrapped around the horizontal axis, and the lower end is connected to the long edge of the ambulance stretcher.

3. The apparatus according to claim 2, characterized in that: The device also includes an anti-sway frame; The anti-sway frame is made up of multiple X-shaped scissor assemblies hinged together end to end. Each X-shaped scissor assembly is made up of two metal strips of the same size hinged together at the midpoint. The lower end of the anti-sway frame is hinged to the ambulance stretcher, and the upper end is hinged to the side wall of the helicopter floor.

4. The apparatus according to claim 3, characterized in that: There are four sets of anti-sway frames, with each steel cable working in conjunction with one set of anti-sway frames; Two sets of anti-sway frames are installed in the middle of the two short sides of the ambulance stretcher as lateral anti-sway frames; the other two sets of anti-sway frames are installed at both ends of one long side of the ambulance stretcher as longitudinal anti-sway frames.

5. The apparatus according to claim 4, characterized in that: The ambulance stretcher is equipped with anti-sway guard grooves at both ends along its length. Both the anti-sway frame and the steel cable are installed inside the anti-sway frame's protective groove.

6. The apparatus according to claim 5, characterized in that: The ambulance unit has an opening in the middle of its two long sides; A side guard bar is installed at the opening, and a side guard rope net is connected between the side guard bar and the ambulance stretcher; the side wall of the anti-sway frame protective groove is equipped with a retaining ring; When lifting the injured person, remove the side protective crossbar. After the injured person is lifted onto the rescue stretcher, insert the side protective crossbar into the retaining ring on the anti-sway frame to fix the side protective crossbar.

7. The apparatus according to claim 6, characterized in that: The side wall of the ambulance stretcher is provided with a clearance groove to avoid the horizontal axis and the motor output shaft.

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