A stretcher testing device

Abstract

The application discloses a stretcher test device, which comprises a frame, a test platform arranged in the frame, a lifting mechanism arranged on the top of the frame and used for driving the test platform to lift, a lifting plate connected with the lifting mechanism, a drop opening arranged in the middle of the lifting plate, two rotating plates hinged to the opposite sides of the drop opening through hinge shafts, a swing cylinder arranged on the outer side wall of the lifting plate and connected with one end of the hinge shaft, and the two rotating plates are used for bearing the stretcher when the two rotating plates are closed and are used for dropping the stretcher when the two rotating plates are rotated downward.

Description

Technical Field

[0001] This application relates to the field of stretcher testing technology, and in particular to a stretcher testing device. Background Technology

[0002] Stretchers can be used as temporary logistics aids for loading and unloading goods, as well as as temporary transfer tools for the wounded. After a batch of stretchers is manufactured, they need to undergo various physical performance tests, such as tensile tests and impact resistance tests. The impact resistance test is conducted by dropping the stretcher from a height to the ground and then observing the damage to the stretcher to assess its impact resistance. Currently, the test is conducted by having staff carry the stretcher to a test platform at a certain height and then push it off the platform. This is not only cumbersome to operate, but also poses certain safety hazards. Utility Model Content

[0003] The main purpose of this application is to provide a stretcher testing device, which aims to solve the technical problem that the existing stretcher testing platform requires workers to work at height, which is not only cumbersome to operate, but also poses certain safety hazards.

[0004] To achieve the above objectives, this application provides a stretcher testing device, including a frame, a testing platform disposed within the frame, and a lifting mechanism at the top of the frame for driving the testing platform to rise and fall. The testing platform includes a lifting plate connected to the lifting mechanism, a placement port being provided in the middle of the lifting plate, and rotating plates being hinged to opposite sides of the placement port via hinge shafts. One end of each hinge shaft is connected to a swing cylinder disposed on the outer wall of the lifting plate. When the two rotating plates are closed, they are used to support the stretcher; when the two rotating plates rotate downwards, they are used to place the stretcher.

[0005] Optionally, the lifting mechanism includes four telescopic cylinders disposed on the top of the frame, and the telescopic ends of the four telescopic cylinders are connected to the top of the four corners of the lifting plate.

[0006] Optionally, the lifting mechanism includes a servo motor located at the top of the frame, a transmission screw connected to the bottom of the servo motor inside the frame, the transmission screw threaded through the lifting plate, a guide rod fixedly connected to the top of the frame, the guide rod movably passing through the lifting plate, and the guide rod and the transmission screw respectively close to both sides of the lifting plate.

[0007] Optionally, there are two transmission screws and two guide rods. The two transmission screws and two guide rods pass through the four corners of the lifting plate, and the two transmission screws are arranged diagonally. One of the transmission screws is connected to a servo motor. Both transmission screws are fixedly fitted with transmission wheels near the top of the frame, and a synchronous belt is wound between the two transmission wheels.

[0008] Optionally, the guide rod is provided with multiple height scale lines along the height direction of the guide rod.

[0009] Optionally, the four corners of the lifting plate are connected with connecting strips that respectively engage with the corresponding transmission screws and guide rods.

[0010] Optionally, protective components are provided on all four sides of the frame to confine the stretcher within the frame area after it lands.

[0011] Optionally, the protective component includes a crossbar disposed on the side wall of the frame, and multiple elastic bands are connected between the crossbar and the bottom of the frame.

[0012] Optionally, at least one crossbar is detachably connected to the side wall of the frame, and both ends of the detachably connected crossbar are connected to hanging rings, and the side wall of the frame is provided with hooks that cooperate with the hanging rings.

[0013] The beneficial effects that this application can achieve are as follows: This application includes a frame containing a test platform. A lifting mechanism is located at the top of the frame to raise and lower the test platform. The test platform includes a lifting plate connected to the lifting mechanism. A drop-off port is located in the center of the lifting plate. Rotating plates are hinged to opposite sides of the drop-off port via hinge shafts. One end of each hinge shaft is connected to a swing cylinder located on the outer wall of the lifting plate. When the two rotating plates are closed, they support the stretcher; when they rotate downwards, they drop the stretcher. Based on this structure, workers can first place the stretcher on the closed rotating plates at a lower position. The lifting mechanism then raises the entire test platform to the corresponding height. By controlling the swing cylinders to rotate rapidly, the two rotating plates quickly rotate downwards by 90°, opening the drop-off port. The stretcher can then fall freely from the drop-off port to the ground, completing the impact test. This process is convenient and quick, eliminates the need for working at heights, and improves test safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the structure of a stretcher testing device according to an embodiment of this application; Figure 2 This is a schematic diagram of another structure of a stretcher testing device according to an embodiment of this application; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction (frame omitted); Figure 4 This is a schematic diagram of the structure of a stretcher testing device after a stretcher is dropped from a height, according to an embodiment of this application. Figure 5 This is a schematic diagram of the connection structure between the frame and the protective components in an embodiment of this application.

[0016] Figure label: 110-Frame, 120-Test platform, 121-Lifting plate, 1211-Dropout port, 122-Hinge shaft, 123-Rotating plate, 124-Connecting bar, 130-Lifting mechanism, 131-Telescopic cylinder, 132-Servo motor, 133-Transmission screw, 134-Guide rod, 1341-Height scale line, 135-Transmission wheel, 136-Synchronous belt, 140-Stretcher, 150-Swing cylinder, 160-Protective components, 161-Crossbar, 162-Elastic belt, 170-Hanging ring, 180-Hook.

[0017] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0020] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0022] Example Reference Figures 1-5 This embodiment provides a stretcher testing device, including a frame 110, a test platform 120 disposed within the frame 110, and a lifting mechanism 130 disposed at the top of the frame 110 for driving the test platform 120 to rise and fall. The test platform 120 includes a lifting plate 121 connected to the lifting mechanism 130. A placement port 1211 is provided in the middle of the lifting plate 121. Rotating plates 123 are respectively hinged to opposite sides of the placement port 1211 via hinge shafts 122. One end of each hinge shaft 122 is connected to a swing cylinder 150 disposed on the outer wall of the lifting plate 121. When the two rotating plates 123 are closed, they are used to support the stretcher 140. When the two rotating plates 123 rotate downward, they are used to place the stretcher 140.

[0023] In this embodiment, the operator can first place the stretcher 140 on the two closed rotating plates 123 at a lower position. The lifting mechanism 130 then moves the test platform 120 upwards to the corresponding height. Next, by controlling the swing cylinder 150 to rotate rapidly, the two rotating plates 123 quickly rotate downwards by 90°, thus opening the drop port 1211. The stretcher 140 can then fall freely from the drop port 1211 to the ground, completing the impact test on the stretcher 140. This process is convenient and quick, requires no work at height, and improves test safety. Furthermore, the lifting mechanism 130 can also raise the test platform 120 to different heights, allowing for drop tests of the stretcher 140 at different heights, increasing the diversity of test data.

[0024] It should be noted that a CCD camera (not shown in the figure) can be installed at the bottom of the lifting plate 121 to capture images of the stretcher 140 after it has fallen to the ground. This images can then be combined with machine vision recognition technology to analyze the damage to the stretcher 140, reduce human error, and improve recognition accuracy.

[0025] As an optional implementation, the lifting mechanism 130 includes four telescopic cylinders 131 disposed on the top of the frame 110, with the telescopic ends of the four cylinders 131 connected to the top of the four corners of the lifting plate 121. The lifting plate 121 can be automatically moved up and down by the telescopic cylinders 131, and the lifting height of the lifting plate 121 can be precisely controlled by controlling the telescopic stroke of the cylinders 131.

[0026] As another optional implementation, the lifting mechanism 130 includes a servo motor 132 disposed on the top of the frame 110, and a transmission screw 133 located inside the frame 110 is connected to the bottom of the servo motor 132. The transmission screw 133 is threaded through the lifting plate 121. A guide rod 134 is fixedly connected to the top of the frame 110. The guide rod 134 movably passes through the lifting plate 121. The guide rod 134 and the transmission screw 133 are respectively close to both sides of the lifting plate 121.

[0027] In this embodiment, when the servo motor 132 starts, it can drive the transmission screw 133 to rotate, while the lifting plate 121 cannot rotate under the restriction of the guide rod 134. Thus, the rotational motion of the transmission screw 133 is converted into the vertical linear motion of the lifting plate 121, so as to realize the automatic lifting control of the lifting plate 121 with high control accuracy.

[0028] As an optional implementation, two transmission screws 133 and two guide rods 134 are provided. The two transmission screws 133 and the two guide rods 134 pass through the four corners of the lifting plate 121 respectively, and the two transmission screws 133 are arranged diagonally. One of the transmission screws 133 is connected to the servo motor 132. A transmission wheel 135 is fixedly sleeved on both transmission screws 133 near the top of the inner frame 110, and a synchronous belt 136 is wound between the two transmission wheels 135.

[0029] In this embodiment, two diagonally arranged lead screws 133 are connected by a drive wheel 135 and a synchronous belt 136 (which can be a drive belt or a drive chain). When the servo motor 132 starts, the two lead screws 133 can rotate synchronously in the same direction, making the drive smoother. At the same time, the two diagonally arranged guide rods 134 provide guidance, which improves the smoothness of the lifting process of the lifting plate 121.

[0030] As an optional implementation, the guide rod 134 is provided with multiple height scale lines 1341 along the height direction of the guide rod 134. The height of the lifting plate 121 can be accurately determined by the height scale lines 1341, thereby accurately controlling the free fall and placement height of the stretcher 140.

[0031] As an optional implementation, the lifting plate 121 is connected to four corners with connecting strips 124 that respectively penetrate and engage with the corresponding transmission screws 133 and guide rods 134. Two connecting strips 124 are threaded to the transmission screws 133, and the other two connecting strips 124 are movably connected to the guide rods 134. This reduces the overall weight of the test platform 120 while ensuring that the guide rods 134 and transmission screws 133 are far away from the stretcher 140 (the purpose is to prevent the stretcher 140 from bouncing up and touching the guide rods 134 or transmission screws 133 after landing).

[0032] As an optional implementation, protective components 160 are provided on all four sides of the frame 110. The protective components 160 are used to confine the stretcher 140 within the frame 110 after it lands, thereby preventing the stretcher 140 from bouncing off the frame 110 after landing and accidentally injuring the staff, thus further improving safety.

[0033] As an optional implementation, the protective component 160 includes a crossbar 161 disposed on the side wall of the frame 110, and a plurality of elastic bands 162 are connected between the crossbar 161 and the bottom of the inner wall of the frame 110.

[0034] In this embodiment, since the stretcher 140 has a limited bounce height, a crossbar 161 is provided at the corresponding height on the side wall of the frame 110, and multiple elastic bands 162 are connected between the crossbar 161 and the bottom of the frame 110 to prevent the stretcher 140 from bouncing out. It is not necessary to provide elastic bands 162 on the entire side of the frame 110, which reduces material costs. At the same time, the elastic bands 162 are elastic and can make flexible contact with the stretcher 140, preventing rigid contact from causing secondary impact damage to the stretcher 140 and affecting the accuracy of the test data.

[0035] As an optional implementation, at least one crossbar 161 is detachably connected to the side wall of the frame 110. Both ends of the detachably connected crossbar 161 are connected to hanging rings 170, and the side wall of the frame 110 is provided with hooks 180 that cooperate with the hanging rings 170.

[0036] In this embodiment, by removing the crossbar 161 from the side wall of the frame 110, the side opening of the frame 110 can be opened, so that staff can enter to place the stretcher 140 or remove the stretcher 140 after the test. The two ends of the crossbar 161 are engaged with the hooks 180 on the side wall of the frame 110 through the hanging rings 170, which can be quickly installed and removed, making the operation convenient and quick.

[0037] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A stretcher testing device, characterized in that, The system includes a frame, within which a test platform is installed. A lifting mechanism is installed at the top of the frame to drive the test platform up and down. The test platform includes a lifting plate connected to the lifting mechanism. A delivery port is opened in the middle of the lifting plate. Rotating plates are hinged to opposite sides of the delivery port via hinge shafts. One end of each hinge shaft is connected to a swing cylinder located on the outer wall of the lifting plate. When the two rotating plates are closed, they are used to support the stretcher. When the two rotating plates rotate downwards, they are used to deliver the stretcher.

2. The stretcher testing device as described in claim 1, characterized in that, The lifting mechanism includes four telescopic cylinders located on the top of the frame, with the telescopic ends of the four cylinders connected to the top of the four corners of the lifting plate.

3. The stretcher testing device as described in claim 1, characterized in that, The lifting mechanism includes a servo motor located at the top of the frame, a transmission screw connected to the bottom of the servo motor inside the frame, the transmission screw threaded through the lifting plate, a guide rod fixedly connected to the top of the frame, the guide rod moving through the lifting plate, and the guide rod and the transmission screw respectively close to both sides of the lifting plate.

4. The stretcher testing device as described in claim 3, characterized in that, There are two transmission screws and two guide rods. The two transmission screws and two guide rods pass through the four corners of the lifting plate, and the two transmission screws are arranged diagonally. One of the transmission screws is connected to the servo motor. Both transmission screws are fixedly fitted with transmission wheels near the top of the frame. A synchronous belt is wound between the two transmission wheels.

5. A stretcher testing device as described in claim 3 or 4, characterized in that, The guide rod has multiple height scale lines along its height direction.

6. The stretcher testing device as described in claim 4, characterized in that, The four corners of the lifting plate are connected by connecting strips that respectively engage with the corresponding transmission screws and guide rods.

7. A stretcher testing device as described in any one of claims 1-4, characterized in that, Protective components are installed on all four sides of the frame to confine the stretcher within the frame area after it lands.

8. The stretcher testing device as described in claim 7, characterized in that, The protective components include crossbars installed on the sidewalls of the frame, with multiple elastic bands connecting the crossbars to the bottom of the frame.

9. The stretcher testing device as described in claim 8, characterized in that, At least one crossbar is detachably connected to the side wall of the frame. Both ends of the detachably connected crossbar are connected to hanging rings, and the side wall of the frame is provided with hooks that cooperate with the hanging rings.

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