Aerial work platform and anti-extrusion device thereof

Abstract

The application discloses a kind of anti-crushing devices, including detection rod, detection sensor and two to be connected with aerial work platform connection part, connection part includes at least one elastic connection part, detection sensor is connected with the control system of aerial work platform, and to measure the displacement of detection rod, the both ends of detection rod are connected with two connection parts respectively.When aerial work platform is crushed, the operator will bend to avoid, and crush detection rod.Elastic connection part is displaced after being subjected to pressure, and the displacement is measured by detection sensor, and if the displacement is too large, aerial work platform is stopped.Detection rod is supported by connection part, and a certain mass of object is needed to crush to produce enough deformation, reducing the risk of false detection.In addition, the detection rod is displaced by pressing down, and the space requirement is lower, and it is not easy to get stuck.The reliability of the anti-crushing device is guaranteed.The application also provides an aerial work platform comprising the above anti-crushing device, and has the above advantages.

Description

Technical Field

[0001] This invention relates to the field of aerial work platform technology, and particularly to an anti-pinch device. This invention also relates to an aerial work platform including the aforementioned anti-pinch device. Background Technology

[0002] Aerial work platforms are commonly used mechanical equipment for construction workers operating at heights. Their safety directly impacts the lives of these workers and is therefore a matter of great concern to the nation and society. Accidents involving aerial work platforms are primarily caused by operational errors resulting in crushing injuries or fatalities.

[0003] Existing technologies offer various anti-pinch solutions, primarily categorized into passive anti-pinch measures through detection and active anti-pinch measures through operator intervention. However, existing anti-pinch devices still have limitations. For instance, passive anti-pinch devices may misdetect when the operator's movements are slightly excessive or they experience a slight loss of balance, causing the equipment to automatically stop and severely impacting normal construction operations. Active anti-pinch devices may fail to provide protection if the push rod becomes stuck.

[0004] Therefore, how to provide a safe and reliable anti-crushing device is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-pinch device, which is equipped with a detection rod and a detection sensor to detect whether an aerial work platform is being crushed. The detection rod and detection sensor have a low false detection rate and are less prone to jamming, thus resulting in higher reliability. Another purpose of this invention is to provide an aerial work platform including the above-mentioned anti-pinch device.

[0006] To achieve the above objectives, the present invention provides an anti-pinch device, comprising a detection rod, a detection sensor, and two connecting parts for connecting to an aerial work platform. Each connecting part includes at least one elastic connecting part. The detection rod is arranged horizontally. When the detection rod is compressed, the elastic connecting part undergoes elastic deformation. The detection sensor is connected to the control system of the aerial work platform and is used to measure the displacement of the detection rod after the elastic connecting part deforms. Both ends of the detection rod are respectively connected to the two connecting parts.

[0007] Preferably, the detection sensor is a limit switch, and the detection sensor is opposite to one end of the detection rod to measure the end displacement of the detection rod.

[0008] Preferably, the connecting part includes two elastic connecting parts, each being an elastic support frame, and the two ends of the detection rod are respectively fixedly connected to the two elastic support frames.

[0009] Preferably, the connecting part includes an elastic support frame and a support column, one end of the detection rod is fixedly connected to the elastic support frame, and the other end of the detection rod is hinged to the support column.

[0010] Preferably, the detection rod and the support column are connected by a spherical bearing.

[0011] Preferably, it also includes a limiting cable for connecting the detection rod to the equipment frame.

[0012] Preferably, the elastic support frame is a rubber support frame.

[0013] Preferably, the rubber support frame includes a connecting sleeve and a connecting seat, the connecting sleeve and the connecting seat are connected in a mating manner, and the support frame is fixedly connected to the working platform by a mounting plate.

[0014] The present invention also provides an aerial work platform, including any of the above-described anti-pinch devices.

[0015] The anti-pinch device provided by the present invention includes a detection rod, a detection sensor, and two connecting parts for connecting to an aerial work platform. Each connecting part includes at least one elastic connecting part. The detection rod is arranged in a horizontal direction, and its two ends are respectively connected to the two connecting parts. When the detection rod is compressed, the elastic connecting parts undergo elastic deformation. The detection sensor is connected to the control system of the aerial work platform and is used to measure the displacement of the end of the detection rod caused by the deformation of the elastic connecting parts.

[0016] When the aerial work platform is crushed, the operator will duck to avoid it, pressing against the detection rod. The elastic connecting part deforms under pressure, causing the detection rod to shift. A detection sensor measures the displacement at the end of the detection rod and uses this displacement as the trigger for the safety system. If the displacement is too large, the aerial work platform's ascent and descent will stop, thus preventing crushing. The detection rod is supported by the connecting part, requiring a certain mass of object to compress it for sufficient deformation, thereby reducing the risk of false detection. Furthermore, the displacement of the detection rod under pressure requires less space and is less prone to jamming, ensuring the reliability of the anti-crushing device.

[0017] The present invention also provides an aerial work platform including the above-mentioned anti-pinch device, and has the above-mentioned advantages. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the anti-crushing device in a specific embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the anti-crushing device in another specific embodiment of the present invention;

[0021] Figure 3 for Figure 1 A partial sectional view;

[0022] Figure 4 for Figure 3 A magnified view of A in the middle.

[0023] in, Figure 1 and Figure 4 The attached figures are labeled as follows:

[0024] Detection rod 1, detection sensor 2, elastic support frame 3, support column 4, limit steel cable 5, mounting plate 6, connecting sleeve 31, connecting seat 32. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of the anti-crushing device in a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the anti-crushing device in another specific embodiment of the present invention; Figure 3 for Figure 1 A partial sectional view; Figure 4 for Figure 3 A magnified view of A in the middle.

[0028] The anti-crushing device provided by this invention has the following structure: Figure 1 or Figure 2As shown, the system includes a detection rod 1, a detection sensor 2, and two connecting parts. The detection rod 1 is horizontally positioned. If the aerial work platform has an operating platform, the detection rod 1 can be positioned above the platform, at a preset distance from the platform surface. If the aerial work platform does not have an operating platform, the detection rod 1 can be positioned above the platform's base plate, with the distance between the detection rod 1 and the base plate not less than the preset distance. Both ends of the detection rod 1 are connected to the platform's guardrail via two connecting parts, at least one of which is an elastic connecting part. When the detection rod 1 is pressed by an operator, the elastic connecting part deforms, causing displacement at the end of the detection rod 1. The detection sensor 2 measures the displacement of the detection rod 1 to determine whether the aerial work platform is under pressure. The detection sensor 2 is connected to the aerial work platform's control system. The control system uses this displacement as a condition for activating the safety system. If the displacement at the end of the detection rod 1 exceeds a preset value, it indicates that the aerial work platform is under pressure. In this case, the aerial work platform is stopped to prevent a pressure accident.

[0029] Optionally, the detection sensor 2 is a limit switch. The limit switch can be connected to the guardrail of the aerial work platform and face one end of the detection rod 1. When the detection rod 1 is compressed, its end displaces, and the limit switch determines whether the aerial work platform is being compressed based on the magnitude of the end displacement of the detection rod 1. Of course, users can also use proximity switches or other sensors as detection sensors as needed, and this is not limited here.

[0030] In one specific embodiment of this application, the connecting portion includes two elastic support frames 3. For example... Figure 1 As shown, the detection rod 1 is fixedly connected to two elastic support frames 3 at both ends. The elastic support frame 3 can specifically be a rubber support frame, and the guardrail of the aerial work platform has a mounting plate 6 installed vertically. The rubber support frame includes a connecting seat 32 for connecting to the mounting plate 6 and a connecting sleeve 31 for connecting to the detection rod 1. Figure 4 As shown, the connecting seat 32 is bolted to the mounting plate 6. The connecting sleeve 31 is located in the middle of the connecting seat 32. The connecting seat 32 is provided with a plug-in strip, and the end face of the connecting sleeve 31 is provided with a plug-in groove. The connecting sleeve 31 and the connecting seat 32 are connected by plugging in; the connecting seat 32 can also be nested with the connecting sleeve. The connecting seat 32 can be made of rigid material, and the connecting sleeve 31 can be made of rubber. When the detection rod 1 is compressed, the rubber support frame also bears the load and undergoes elastic deformation, thus causing the detection rod 1 to shift. At the same time, the limit switch detects the amount of displacement at the end of the detection rod 1 and controls the aerial work platform to stop.

[0031] The connecting sleeve 31 in the rubber support frame is made of rubber, thus allowing for deformation in multiple horizontal and vertical directions. When the aerial work platform is subjected to compression, the operator can take various positions to avoid it and trigger the anti-compression device, stopping the aerial work platform. This improves the safety of the aerial work platform.

[0032] Additionally, if the pressure on the detection rod 1 is too great, the end of the detection rod 1 may detach from the connecting sleeve. To prevent the detection rod 1 from falling and causing injury, the anti-crushing device also includes a limiting steel cable 5, such as... Figure 4 As shown, the detection rod 1 has a through hole along the radial direction, through which the limiting steel cable 5 passes, and both ends are connected to the mounting plate 6. After the destructible support frame is damaged, the limiting steel cable 5 can hold the detection rod 1, preventing it from falling.

[0033] Optionally, in another specific embodiment of this application, the connecting part further includes a support column, and the elastic connecting part is an elastic support frame 3. For example... Figure 2 As shown, the first end of the detection rod 1 is fixedly connected to the elastic support frame 3, and the second end of the detection rod 1 is hinged to the support column 4. The elastic support frame 3 can specifically be a rubber support frame, the structure of which can be referred to in the previous specific embodiment. When the detection rod 1 is compressed, the rubber support frame also bears the load. The rubber support frame undergoes elastic deformation, and the first end also displaces accordingly. The limit switch detects the amount of displacement at the first end and controls the aerial work platform to stop. Of course, the elastic support frame 3 can also be made of other materials, which are not limited here.

[0034] In addition, to ensure that the detection rod 1 can move flexibly under pressure and reduce the risk of the detection rod 1 getting stuck, the detection rod 1 is connected to the support column 4 by a spherical bearing. The operator can cause the detection rod 1 to move by pressing it in any direction.

[0035] The present invention also provides an aerial work platform, including any of the above-mentioned anti-pinch devices; the control system of the aerial work platform is connected to the detection sensor 2, and when the detection sensor 2 detects that the displacement of the end of the detection rod 1 is too large, it controls the motor of the aerial work platform to stop. The structure of other parts of the aerial work platform can refer to the prior art, and will not be described in detail here.

[0036] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0037] The aerial work platform and its anti-pinch device provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An anti-crushing device, characterized in that, The system includes a detection rod (1), a detection sensor (2), and two connecting parts for connecting to an aerial work platform, at least one of the connecting parts being an elastic support frame (3); the detection rod (1) is arranged horizontally, with both ends connected to the two connecting parts respectively, and when the connecting part is an elastic support frame (3), the detection rod (1) is fixedly connected to the elastic support frame (3); after the detection rod (1) is compressed, the elastic support frame (3) undergoes elastic deformation; the detection sensor (2) is connected to the control system of the aerial work platform to measure in real time the displacement of the end of the detection rod (1) caused by the deformation of the elastic support frame (3), thereby determining whether the aerial work platform is in a state of being squeezed, and controlling the aerial work platform to stop when the displacement is greater than a preset value; The device also includes a limiting cable for connecting the detection rod (1) to the equipment frame, the limiting cable being used to prevent the detection rod (1) from falling.

2. The anti-crushing device according to claim 1, characterized in that, Another connecting part is also an elastic support frame (3), and the two ends of the detection rod (1) are fixedly connected to the two elastic support frames (3) respectively.

3. The anti-crushing device according to claim 1, characterized in that, Another connection part is a support column. One end of the detection rod (1) is fixedly connected to the elastic support frame (3), and the other end of the detection rod (1) is hinged to the support column.

4. The anti-crushing device according to claim 3, characterized in that, The detection rod (1) and the support column (4) are connected by a joint bearing.

5. The anti-crushing device according to any one of claims 2 to 4, characterized in that, The elastic support frame (3) is a rubber support frame.

6. The anti-crushing device according to claim 5, characterized in that, The detection sensor (2) is a limit switch or a proximity switch. The detection sensor (2) is opposite to one end of the detection rod (1) and is used to measure the end displacement of the detection rod (1).

7. The anti-crushing device according to claim 6, characterized in that, The rubber support frame includes a connecting sleeve (31) and a connecting seat (32). The connecting sleeve (31) and the connecting seat (32) are connected in a cooperative manner, and the rubber support frame is fixedly connected to the working platform.

8. An aerial work platform, characterized in that, Includes the anti-crushing device as described in any one of claims 1 to 7.

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