Hoisting mechanism of fire fighting truck and fire fighting truck

Abstract

The utility model relates to the technical field of fire fighting trucks, and provides a hoisting mechanism of a fire fighting truck and the fire fighting truck, the hoisting mechanism of the fire fighting truck comprises: a base mounted at the rear end of the fire fighting truck; the mechanical arm assembly is arranged in a foldable mode, connected with the base and used for carrying the fire-fighting unmanned aerial vehicle; the rotating assembly is connected with the base and used for driving the mechanical arm assembly to rotate and adjusting the angle of the mechanical arm assembly. According to the technical scheme, the lifting mechanism installed on the fire fighting truck can achieve lifting operation of the fire-fighting unmanned aerial vehicle, external vehicles such as forklifts do not need to be additionally allocated, the operation space needed when the fire-fighting unmanned aerial vehicle is lifted is reduced, the fire-fighting unmanned aerial vehicle can be conveniently lifted to the fire fighting truck in some narrow areas, and therefore the fire fighting unmanned aerial vehicle can be conveniently lifted to the fire fighting truck. And the lifting efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of fire truck technology, and more specifically, to a lifting mechanism for a fire truck and a fire truck. Background Technology

[0002] With the development of the world economy, the number of high-rise and super high-rise buildings in cities is increasing. When fires occur in high-rise buildings that are tens or even hundreds of meters tall, firefighting drones are sometimes used to carry out firefighting operations. Because firefighting drones are large, they cannot land directly and accurately on fire trucks after the firefighting operation is completed. They need to land smoothly in an open area next to the fire truck and be lifted into the fire truck by equipment such as forklifts. Forklifts also need to provide a certain range of movement when working.

[0003] Therefore, when using firefighting drones for firefighting operations, in some areas with small spaces where the forklift's movement is limited, it can be difficult for the forklift to lift the firefighting drone, thus affecting the drone's lifting efficiency. Utility Model Content

[0004] The technical problem to be solved by this application is to provide a lifting mechanism for a fire truck and a fire truck. The lifting mechanism installed on the fire truck can realize the lifting operation of fire-fighting drones without the need to allocate additional external vehicles such as forklifts, reducing the operating space required when lifting fire-fighting drones, and making it convenient to lift fire-fighting drones onto fire trucks even in some narrow areas, thereby improving lifting efficiency.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] In a first aspect, this application provides a lifting mechanism for a fire truck, comprising: a base installed at the rear end of the fire truck; a foldable robotic arm assembly connected to the base for transporting a fire-fighting drone; and a rotating assembly connected to the base for driving the robotic arm assembly to rotate and adjusting the angle of the robotic arm assembly.

[0007] In one embodiment, the robotic arm assembly includes a first connecting arm, a second connecting arm, and a third connecting arm that are rotatably connected to each other. The third connecting arm is connected to the rotating assembly, and the two ends of the second connecting arm are respectively connected to the first connecting arm and the third connecting arm.

[0008] In one embodiment, the robotic arm assembly further includes a winch and a hook. The winch is mounted on the third connecting arm, and the hook is mounted at one end of the third connecting arm. The hook is used to lift the firefighting drone, and the winch is used to control the raising or lowering of the hook.

[0009] In one embodiment, the third connecting arm is a telescopic structure, and the third connecting arm is provided with a long-angle sensor for detecting the telescopic length of the third connecting arm.

[0010] In one embodiment, a first gear is provided at the connection position between the first connecting arm and the base. The first gear is fixedly connected to the first connecting arm. A second gear is also provided on the first connecting arm. The first gear and the second gear mesh with each other. A rotary encoder is also provided on the second gear. The rotary encoder is coaxial with the second gear and is used to detect the rotation angle of the first gear.

[0011] In one embodiment, the base is also provided with an electro-hydraulic proportional multi-way valve, which is used to simultaneously control the operation of the robotic arm assembly and the rotating assembly.

[0012] In one embodiment, the base is provided with multiple support cylinders, and the base is also provided with a manual multi-way valve for controlling the support cylinders.

[0013] In one embodiment, the lifting mechanism further includes a first luffing cylinder, a second luffing cylinder, and a telescopic cylinder. The two ends of the first luffing cylinder are respectively hinged to one end of the first connecting arm and one end of the second connecting arm; the two ends of the second luffing cylinder are respectively hinged to one end of the second connecting arm and one end of the third connecting arm; and the two ends of the telescopic cylinder are respectively connected to the third connecting arm.

[0014] In one embodiment, the lifting mechanism further includes hydraulic cylinder pressure sensors, which are respectively installed on the second luffing cylinder.

[0015] Secondly, this application provides a fire truck, which includes the lifting mechanism of the fire truck described in the first aspect, and also includes a fire-fighting drone, wherein the lifting mechanism is disposed at the rear end of the fire truck.

[0016] The technical solution of this application has the following effects:

[0017] The lifting mechanism includes a base mounted at the rear of the fire truck, ensuring the entire lifting mechanism is located at the rear, thus reducing the space occupied by the lifting mechanism on the width of the fire truck and facilitating its passage through narrow roads. The lifting mechanism also includes a robotic arm assembly connected to the base. This robotic arm assembly is used to transport the firefighting drone and can be folded, further reducing the space occupied by the lifting mechanism and facilitating fire truck transportation, as well as passage through confined areas. It also includes a rotating assembly connected to the base, used to drive the robotic arm assembly to rotate and align it with the firefighting drone, allowing the robotic arm assembly to lift the drone onto the fire truck. This allows the lifting mechanism on the fire truck in this application to achieve the purpose of lifting the firefighting drone, and its overall size is smaller than that of a forklift. Furthermore, since the lifting mechanism is fixed to the fire truck, its working range is smaller than that of a forklift, enabling convenient lifting of the firefighting drone onto the fire truck even in confined areas, thus improving lifting efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a fire truck provided in an embodiment of this application;

[0020] Figure 2 This is a structural schematic diagram of the lifting mechanism provided in an embodiment of this application;

[0021] Figure 3 Schematic diagrams of the lifting mechanism from different perspectives provided in different embodiments of this application;

[0022] Figure 4 This is a structural schematic diagram of a fire truck provided in an embodiment of this application.

[0023] Icons: 1-Base; 2-Robotic arm assembly; 21-First connecting arm; 22-Second connecting arm; 23-Third connecting arm; 24-Winch; 25-Hook; 3-Rotating assembly; 4-Long angle sensor; 5-First gear; 6-Second gear; 7-Rotary encoder; 8-Electro-hydraulic proportional multi-way valve; 9-Support cylinder; 10-Manual multi-way valve; 11-First luffing cylinder; 12-Second luffing cylinder; 13-Telescopic cylinder; 14-Cylinder pressure sensor; 15-Firefighting drone. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0025] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figure 1 As shown, this application embodiment provides a lifting mechanism for a fire truck, including a base 1. The base 1 is installed at the rear end of the fire truck, so that the entire lifting mechanism is located at the rear end of the fire truck, thereby reducing the space occupied by the lifting mechanism in the width of the fire truck and facilitating the fire truck's passage through narrow roads. The lifting mechanism also includes a robotic arm assembly 2, which is connected to the base 1. The robotic arm assembly 2 is used to carry the fire-fighting drone 15 and can be folded, thereby reducing the space occupied by the lifting mechanism, facilitating fire truck transportation, and also facilitating the fire truck's passage through narrow areas. It also includes a rotating assembly 3, which is connected to the base 1 and is used to drive the robotic arm assembly 2 to rotate and adjust the angle of the robotic arm assembly 2 so that the robotic arm assembly 2 can be aligned with the fire-fighting drone. The lifting mechanism 15 facilitates the lifting of the fire-fighting drone 15 onto the fire truck by the robotic arm assembly 2. In some cases, the robotic arm assembly 2 can also move the fire-fighting drone 15 from the fire truck to an open area. This allows the lifting mechanism on the fire truck in this embodiment to achieve the purpose of lifting and moving the fire-fighting drone 15. The overall size is smaller than that of a forklift, and the lifting mechanism is fixed to the fire truck. During operation, since the lifting mechanism does not need to move back and forth like a forklift, the required working range is smaller than that of a forklift. This allows for convenient lifting of the fire-fighting drone 15 onto the fire truck or moving it from the fire truck to the ground in confined spaces, improving lifting and moving efficiency.

[0027] Optionally, when it is inconvenient for the fire-fighting drone 15 to take off from the fire truck, the lifting mechanism of this embodiment can also move the fire-fighting drone 15 from the fire truck to an open ground before it starts working, so as to facilitate the take-off of the fire-fighting drone 15.

[0028] In the prior art, when firefighting drones are transported from fire trucks to the ground or back to fire trucks, it is necessary to dispatch external vehicles such as forklifts, which is a cumbersome process. At the same time, sometimes when forklifts and other equipment cannot arrive at the scene in time, it will also delay the firefighting. However, the lifting mechanism of the present application embodiment is installed on the fire truck, eliminating the need to dispatch additional forklifts. It can work at any time, thereby saving time and improving efficiency.

[0029] In the existing technology, when fire-fighting drones sometimes malfunction and cannot take off before or after takeoff, the lack of forklifts can affect the maintenance time of the fire-fighting drones. However, by using a lifting mechanism, the fire-fighting drone can be directly moved from the fire truck to the ground or lifted from the ground to the fire truck, which can improve efficiency and shorten maintenance time.

[0030] Optionally, the rotating component 3 can be a rotary cylinder, which converts hydraulic energy into mechanical energy through a hydraulic system to drive the robotic arm assembly 2 to rotate around the rotation center. This rotational motion allows the lifting mechanism to flexibly adjust the direction of the robotic arm assembly 2 without moving the base 1.

[0031] like Figure 2 and 3 As shown, in one embodiment, the robotic arm assembly 2 includes a first connecting arm 21, a second connecting arm 22, and a third connecting arm 23 that are rotatably connected to each other, thereby enabling the robotic arm assembly 2 to fold, reducing its size and facilitating the passage of fire trucks through narrow areas; the third connecting arm 23 is connected to the rotating assembly 3, and the two ends of the second connecting arm 22 are respectively connected to the first connecting arm 21 and the third connecting arm 23, so that when the rotating assembly 3 directly drives the third connecting arm 23 to rotate, it can simultaneously drive the first connecting arm 21, the second connecting arm 22, and the third connecting arm 23 to rotate synchronously as a whole.

[0032] Optionally, the first connecting arm 21 and the second connecting arm 22 can be connected by a linkage mechanism.

[0033] like Figure 2 and 3 As shown, in one embodiment, the robotic arm assembly 2 also includes a winch 24 and a hook 25. The winch 24 is mounted on the third connecting arm 23, and the hook 25 is mounted on one end of the third connecting arm 23. The hook 25 is used to lift the fire-fighting drone 15, and the winch 24 is used to control the raising or lowering of the hook 25. Thus, the fire-fighting drone 15 can be lifted by the hook 25, and the wire rope can be pulled by the winch 24 to realize the lifting and transportation of the fire-fighting drone 15.

[0034] Optionally, the winch 24 is driven by a motor, converting electrical energy into mechanical energy to drive the drum to rotate. The wire rope on the drum is connected to the hook 25 through a pulley block, thereby realizing the lifting and lowering of the load.

[0035] Optionally, the winch 24 is also equipped with a speed change device and a braking system, which can precisely control the lifting and lowering speed of the hook 25.

[0036] like Figure 1As shown, in one embodiment, the third connecting arm 23 is a telescopic structure. The third connecting arm 23 is equipped with a long angle sensor 4 for detecting the telescopic length of the third connecting arm 23, so that the telescopic length of the third connecting arm 23 can be accurately determined.

[0037] Optionally, the long-angle sensor 4 measures length using the Hall effect and includes a drum with a rope wound around it, one end of which is fixed to a third connecting arm 23. When the third connecting arm 23 extends or retracts, the rope drives the drum to rotate, causing a magnet on the drum to rotate as well. The Hall sensor senses the change in the magnetic field generated by the rotating magnet and transmits the signal to a processor. The processor calculates the rotation angle of the drum based on the change in the magnetic field, and then, combined with the circumference of the drum and the diameter of the rope, calculates the extension or retraction length of the rope, ultimately determining the extension or retraction length of the third connecting arm 23.

[0038] Optionally, in the folded state, the third connecting arm 23 is located on one side of the second connecting arm 22. Therefore, one end of the third connecting arm 23 can also be provided with a linkage mechanism to be rotatably connected to the second connecting arm 22.

[0039] like Figure 2 As shown, in one embodiment, a first gear 5 is also provided at the connection position between the first connecting arm 21 and the base 1. The first gear 5 is fixedly connected to the first connecting arm 21. A second gear 6 is also provided on the first connecting arm 21. The first gear 5 and the second gear 6 mesh with each other. A rotary encoder 7 is also provided on the second gear 6. The rotary encoder 7 is coaxial with the second gear 6 and is used to detect the rotation angle of the first gear 5, thereby determining the rotation angle of the robotic arm assembly 2.

[0040] like Figure 2 and 3 As shown, in one embodiment, the base 1 is also provided with an electro-hydraulic proportional multi-way valve 8, which is used to simultaneously control the operation of the robotic arm assembly 2 and the rotating assembly 3. In this embodiment, the original manual multi-way valve 10 is replaced with the electro-hydraulic proportional multi-way valve 8. The electro-hydraulic proportional multi-way valve 8 is controlled by an electrical signal, which can realize remote operation, automated control and even wireless remote control. The operator only needs to touch the button or input the command through the control panel to complete the operation. Compared with the manual multi-way valve 10 that relies on manual operation and requires manual rotation of the handle or joystick, the operation efficiency is improved.

[0041] Meanwhile, the electro-hydraulic proportional multi-way valve 8 can achieve high-precision flow, pressure and direction control. Through the proportional electromagnet and feedback device, the parameters of the hydraulic system can be adjusted proportionally to reduce hydraulic shock. In contrast, the control precision of the manual multi-way valve 10 is limited by the operator's experience and feel, making it difficult to achieve precise adjustment. The electro-hydraulic proportional multi-way valve 8 also has pressure compensation and load sensing functions, which can automatically adjust the flow and pressure according to the load requirements, reduce energy loss and improve system efficiency. The manual multi-way valve 10 lacks automatic adjustment function and has lower energy utilization efficiency.

[0042] like Figure 2 and 3 As shown, in one embodiment, the base 1 is provided with multiple support cylinders 9, and the base 1 is also provided with a manual multi-way valve 10 for controlling the support cylinders 9. By setting multiple support cylinders 9 on the base 1, the overall lifting mechanism can be supported, thereby improving stability; while the manual multi-way valve 10 is used to open the support cylinders 9.

[0043] like Figure 2 and 3 As shown, in one embodiment, the lifting mechanism further includes a first luffing cylinder 11, a second luffing cylinder 12, and a telescopic cylinder 13. The two ends of the first luffing cylinder 11 are respectively hinged to one end of the first connecting arm 21 and one end of the second connecting arm 22, thereby enabling the second connecting arm 22 to bend or straighten. The two ends of the second luffing cylinder 12 are respectively hinged to one end of the second connecting arm 22 and one end of the third connecting arm 23, thereby enabling the second connecting arm 22 to bend or straighten. The two ends of the telescopic cylinder 13 are respectively connected to the third connecting arm 23, thereby enabling the adjustment of the telescopic length of the third connecting arm 23.

[0044] Optionally, two telescopic cylinders 13 can be set, which can make the third connecting arm 23 into multiple segments of different lengths.

[0045] like Figure 2 As shown, in one embodiment, the lifting mechanism also includes a cylinder pressure sensor 14, which is mounted on the second luffing cylinder 12. The cylinder pressure sensor 14 is used to detect the pressure of the second luffing cylinder 12 and can determine whether the crane is overloaded. When the pressure exceeds a set safety threshold, the cylinder pressure sensor 14 will issue an alarm or trigger an automatic shutdown function to prevent the lifting mechanism from overturning or causing other accidents due to overload.

[0046] like Figure 1 and 4As shown, in a second aspect, this application embodiment also provides a fire truck, which includes the lifting mechanism of the fire truck provided in the first aspect, and also includes a fire-fighting drone 15. The fire-fighting drone 15 is used to perform high-altitude fire extinguishing. The lifting mechanism is located at the rear of the fire truck, thereby reducing the volume occupied on the width of the fire truck and improving the space utilization rate of the fire truck.

[0047] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of 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 scope of protection of this application.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A lifting mechanism for a fire truck, characterized in that, include: A base, which is mounted at the rear end of the fire truck; A foldable robotic arm assembly is connected to the base for transporting firefighting drones. A rotating component, connected to the base, is used to drive the robotic arm assembly to rotate and adjust the angle of the robotic arm assembly.

2. The lifting mechanism of the fire truck according to claim 1, characterized in that, The robotic arm assembly includes a first connecting arm, a second connecting arm, and a third connecting arm that are rotatably connected to each other. The third connecting arm is connected to the rotating assembly, and the two ends of the second connecting arm are respectively connected to the first connecting arm and the third connecting arm.

3. The lifting mechanism of the fire truck according to claim 2, characterized in that, The robotic arm assembly also includes a winch and a hook. The winch is mounted on the third connecting arm, and the hook is mounted on one end of the third connecting arm. The hook is used to lift the firefighting drone, and the winch is used to control the raising or lowering of the hook.

4. The lifting mechanism of the fire truck according to claim 3, characterized in that, The third connecting arm is a telescopic structure, and a long-angle sensor is provided on the third connecting arm to detect the telescopic length of the third connecting arm.

5. The lifting mechanism of the fire truck according to any one of claims 2 to 4, characterized in that, A first gear is provided at the connection position between the first connecting arm and the base. The first gear is fixedly connected to the first connecting arm. A second gear is also provided on the first connecting arm. The first gear and the second gear mesh with each other. A rotary encoder is also provided on the second gear. The rotary encoder is coaxial with the second gear and is used to detect the rotation angle of the first gear.

6. The lifting mechanism of the fire truck according to any one of claims 1 to 4, characterized in that, The base is also equipped with an electro-hydraulic proportional multi-way valve, which is used to simultaneously control the operation of the robotic arm assembly and the rotating assembly.

7. The lifting mechanism of the fire truck according to any one of claims 1 to 4, characterized in that, The base is equipped with multiple support cylinders, and the base is also equipped with a manual multi-way valve for controlling the support cylinders.

8. The lifting mechanism of the fire truck according to any one of claims 2 to 4, characterized in that, The lifting mechanism further includes a first luffing cylinder, a second luffing cylinder, and a telescopic cylinder. The two ends of the first luffing cylinder are respectively hinged to one end of the first connecting arm and one end of the second connecting arm; the two ends of the second luffing cylinder are respectively hinged to one end of the second connecting arm and one end of the third connecting arm; and the two ends of the telescopic cylinder are respectively connected to the third connecting arm.

9. The lifting mechanism of the fire truck according to claim 8, characterized in that, The lifting mechanism also includes a hydraulic cylinder pressure sensor, which is installed on the second luffing cylinder.

10. A fire truck, characterized in that, The fire truck includes a lifting mechanism as described in any one of claims 1 to 9, and also includes a fire-fighting drone, wherein the lifting mechanism is located at the rear end of the fire truck.

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