Leveling device suitable for aloft work and fire fighting truck

Abstract

The leveling device comprises an arm support, a leveling oil cylinder, a first chain wheel, a second chain wheel, a roller chain, a platform swing frame and a working platform. A connecting shaft is arranged at one end of the platform swing frame and connected with the working platform, and the other end of the platform swing frame is fixedly connected with the first chain wheel. The first chain wheel and the second chain wheel are in transmission connection through a roller chain; the leveling oil cylinder, the second chain wheel and the roller chain are arranged in the arm frame; the leveling oil cylinder comprises a cylinder barrel and a piston rod, one end of the cylinder barrel of the leveling oil cylinder is fixedly connected with the arm frame, and one end of the piston rod of the leveling oil cylinder is fixedly connected with the roller chain. The utility model further discloses the fire fighting truck comprising the leveling device. According to the leveling device, the maintenance frequency of the leveling device can be reduced, rusting caused by corrosion of rainwater and sand dust is avoided, meanwhile, higher reliability and stability are achieved, and the leveling task can be accurately and rapidly completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of fire trucks, and particularly relates to a leveling device applicable to aerial work and a fire truck. Background Technique

[0002] In the field of aerial work, such as the operation process of equipment like fire trucks and aerial maintenance platforms, the leveling device plays a crucial role. The main function of the leveling device is to ensure that the working platform can maintain a horizontal state under different terrains and angles, thereby ensuring the safety of operators and the operation efficiency. However, there are some deficiencies in the design of traditional leveling devices, which limit their performance and reliability in practical applications.

[0003] Traditional leveling devices often adopt complex mechanical structures, which not only occupy a large space but also have high maintenance costs. The transmission components are usually exposed to the external environment and are easily eroded by natural factors such as rain, sand, and dust, resulting in problems such as rust and wear, which in turn affect the accuracy and service life of the leveling device. In addition, some leveling devices use gears, belts, etc. in the transmission method, and these transmission methods are prone to failures in complex and changeable working environments, resulting in unstable power and affecting the operation efficiency.

[0004] In order to solve the above problems, there is an urgent need for a leveling device with a compact structure, simple maintenance, and stable power. Content of the Utility Model

[0005] The utility model aims at the above problems, makes up for the deficiencies of the prior art, and provides a leveling device applicable to aerial work, which includes a boom, a leveling oil cylinder, a first sprocket, a second sprocket, a roller chain, a platform swing frame, and a working platform;

[0006] One end of the platform swing frame is provided with a connecting shaft, the connecting shaft is connected with the working platform, and the other end of the platform swing frame is fixedly connected with the first sprocket; the first sprocket and the second sprocket are connected by a roller chain; the leveling oil cylinder, the second sprocket, and the roller chain are arranged inside the boom; the leveling oil cylinder includes a cylinder barrel and a piston rod, one end of the cylinder barrel of the leveling oil cylinder is fixedly connected with the boom, and one end of the piston rod of the leveling oil cylinder is fixedly connected with the roller chain.

[0007] Preferably, the leveling device further includes a swing oil cylinder, the swing oil cylinder is arranged on the working platform, and the movable end of the swing oil cylinder is movably connected with the connecting shaft.

[0008] Preferably, the connecting shaft and the working platform are rotatably connected by a pin shaft

[0009] Preferably, the number of the first sprocket, the second sprocket, and the roller chain is two each, and the two first sprockets are axially connected, and the two second sprockets are axially connected.

[0010] Preferably, a sprocket housing is provided outside the first sprocket, and the sprocket housing is connected to the boom.

[0011] Preferably, the leveling device further includes an angle sensor and a controller. The angle sensor is arranged on the working platform, the angle sensor is electrically connected to the controller, and the controller is electrically connected to the leveling cylinder.

[0012] Another object of the present invention is to provide a fire truck, which includes the above-mentioned leveling device.

[0013] Advantages of the present invention:

[0014] 1. The leveling cylinder, roller chain, and second sprocket of the present leveling device are all arranged inside the boom. A sprocket housing is provided outside the first sprocket, and the sprocket housing and the boom are assembled into an integrated structure. This structure not only saves space, but also the roller chain is arranged inside the boom, which can reduce the number of its maintenance, avoid rusting due to the erosion of rainwater and sand and dust, and thus improve the accuracy and service life of the leveling device.

[0015] 2. Compared with traditional transmission methods such as gears and belts, the present invention has higher reliability and stability. In a complex and changeable working environment, the transmission of the present invention can maintain stable and continuous power output, thereby ensuring that the leveling device can accurately and quickly complete the leveling task. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a leveling device suitable for high-altitude operations according to the present invention.

[0017] Figure 2 is a partial structural schematic diagram of a leveling device suitable for high-altitude operations according to the present invention.

[0018] Figure 3 is one of the installation schematic diagrams of the boom in the present invention.

[0019] Figure 4 is the second installation schematic diagram of the boom in the present invention.

[0020] Figure 5 is a schematic structural diagram of the platform swing frame, the first sprocket, and the connecting shaft in the present invention.

[0021] Figure 6 is a schematic structural diagram of the working platform in the present invention.

[0022] Figure 7 is the installation schematic diagram of the leveling cylinder in the present invention.

[0023] Figure 8 is Figure 7Partial enlarged view at position I in the figure.

[0024] Markings in the figure: 1 is the platform swing frame, 2 is the first sprocket, 3 is the second sprocket, 4 is the roller chain, 5 is the leveling oil cylinder, 6 is the connecting shaft, 7 is the pin shaft, 8 is the swing oil cylinder, 9 is the working platform, 10 is the boom, 11 is the support frame, 12 is the connecting plate, 13 is the nut, 14 is the screw, 15 is the first cover plate, 16 is the second cover plate, 101 is the vertical inclined plate, 102 is the horizontal plate, 601 is the connecting component. A, B, and C are three hinge points. Detailed implementation manners

[0025] In order to make the technical problems, technical solutions, and beneficial effects solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. It should be understood that the specific implementation manners described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] Combined with Figures 1 to 8 As shown, a leveling device applicable to high-altitude operations includes a boom 10, a leveling oil cylinder 5, a first sprocket 2, a second sprocket 3, a roller chain 4, a platform swing frame 1, and a working platform 9;

[0027] As Figure 5 shown, the platform swing frame 1 is formed by connecting a horizontal plate 102 and a vertical inclined plate 101; the axis of the vertical inclined plate 101 is inclined to the axis of the horizontal plate 102; the structure of the platform swing frame 1 enables the boom 10 to be above the working platform 9; one end of the platform swing frame 1 is provided with a connecting shaft 6, and the connecting shaft 6 is connected to the working platform 9, and the other end of the platform swing frame 1 is fixedly connected to the first sprocket 2; a support frame 11 is provided below the horizontal plate 102, and the support frame 11 can make the connection between the platform swing frame 1 and the connecting shaft 6 more stable.

[0028] As Figure 1 shown, the first sprocket 2 is drivingly connected to the second sprocket 3 through the roller chain 4; the leveling oil cylinder 5, the second sprocket 3, and the roller chain 4 are arranged inside the boom 10; the leveling oil cylinder 5 includes a cylinder barrel and a piston rod, one end of the cylinder barrel of the leveling oil cylinder 5 is fixedly connected to the boom 10, and one end of the piston rod of the leveling oil cylinder 5 is fixedly connected to the roller chain 4.

[0029] Specifically, the leveling device further includes a swing oil cylinder 8, the swing oil cylinder 8 is arranged outside the working platform 9, and the movable end of the swing oil cylinder 8 is movably connected to the connecting shaft 6. A connecting component 601 is arranged at the bottom of the connecting shaft 6, and is hinged to the swing oil cylinder 8 through the connecting component 601, and the swing oil cylinder 8 can drive the working platform 9 to swing left and right.

[0030] Specifically, as Figure 5 and Figure 6As shown in the figure, the connecting shaft 6 and the working platform 9 are rotatably connected by a pin shaft 7. The connecting shaft 6 is provided with axial holes, and the axial holes are assembled with the upper and lower mounting flanges on the working platform 9 through the pin shaft 7.

[0031] Specifically, the number of the first sprockets 2, the second sprockets 3, and the roller chains 4 is two each. The two first sprockets 2 are axially connected, and the two second sprockets 3 are axially connected. The two sets of transmission sprockets and the roller chain 4 make the connection between the connecting shaft 6 and the leveling cylinder 5 more stable and the transmission more smooth. As Figure 7 shown in the figure, the piston rod of the leveling cylinder 5 is fixed to one end of the connecting plate 12 through screws 14 and nuts 13, and the other end of the connecting plate 12 is fixed to the two roller chains 4.

[0032] Specifically, a sprocket housing is arranged outside the first sprocket 2, and the sprocket housing is connected to the boom 10. In this way, an integral structure can be formed, so that the transmission device of the present utility model is arranged inside and does not directly contact the external environment, which can reduce the maintenance frequency, avoid rusting due to the erosion of rainwater and sand and dust, and thus improve the accuracy and service life of the leveling device.

[0033] Specifically, the leveling device further includes an angle sensor and a controller. The angle sensor is arranged on the working platform 9, the angle sensor is electrically connected to the controller, and the controller is electrically connected to the leveling cylinder 5. The angle data between the working platform 9 and the horizontal ground detected by the angle sensor is calculated by the controller to obtain the required rotation angle, and then the controller drives the leveling cylinder 5 to perform telescopic movement to achieve the purpose of leveling the working platform 9.

[0034] Specifically, the diameter of the first sprocket 2 is larger than that of the second sprocket 3. The first sprocket 2 is a component for driving the working platform 9, and the large diameter of the first sprocket 2 is beneficial to the large-scale leveling of the working platform 9, while the space inside the boom 10 for the second sprocket 3 is small, and the transmission range of the second sprocket 3 is small to adapt to the narrow space.

[0035] Another object of the present utility model is to provide a fire truck, and the fire truck includes the above leveling device.

[0036] Figure 2 In the figure, A, B, and C are three hinge points. Through these three hinge points, the second sprocket 3, the roller chain 4, and the leveling cylinder 5 are installed inside the boom 10. The three hinge points A, B, and C can penetrate the pin shaft 7 and the shaft retainer, and adjustment pads are added for adjustment.

[0037] As Figure 1 、 Figure 3 、 Figure 4 shown in the figure, after the leveling cylinder 5, the first sprocket 2, the second sprocket 3, and the roller chain 4 are installed in the boom 10, the mounting openings on the boom 10 are sealed with the first cover plate 15 and the second cover plate 16 to reduce the erosion of rainwater on the inside of the boom 10.

[0038] One end of the cylinder barrel of the leveling oil cylinder 5 is fixed on the boom 10, and the other end piston rod of the leveling oil cylinder 5 is fixedly connected to the roller chain 4. During operation, according to the angle data detected by the angle sensor between the working platform 9 and the horizontal ground, the angle that the working platform 9 needs to be adjusted is obtained, so as to calculate the distance that the roller chain 4 moves linearly, and then the leveling oil cylinder 5 is driven to perform telescopic movement. The telescopic movement of the piston rod can make the roller chain 4 move linearly, and the linear movement of the roller chain 4 can make the first sprocket 2 and the second sprocket 3 rotate, so as to perform angle adjustment and drive the working platform 9 to be adjusted, thus completing a cycle of leveling action and making the working platform 9 in a state parallel to the ground. The working platform 9 is kept parallel to the ground so that the staff can operate accurately and the rescued personnel can reach the ground safely.

[0039] The leveling oil cylinder 5, the roller chain 4 and the second sprocket 3 of this leveling device are all arranged inside the boom 10. The first sprocket 2 is assembled with the boom 10 into an integral structure through the outer shell. This structure not only saves space, but also the roller chain 4 is arranged inside the boom 10, which can reduce its maintenance frequency and avoid rusting due to the erosion of rainwater and sand and dust, thereby improving the accuracy and service life of the leveling device.

[0040] This utility model adopts a transmission method of matching the roller chain 4 with the sprocket. Compared with the traditional transmission methods such as gears and belts, the transmission method of this utility model has higher reliability and stability. In a complex and changeable working environment, the transmission of this utility model can maintain the smoothness and continuity of power output, so as to ensure that the leveling device can accurately and quickly complete the leveling task.

[0041] It can be understood that the above specific description of this utility model is only for explaining this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those of ordinary skill in the art should understand that this utility model can still be modified or equivalently replaced to achieve the same technical effects; as long as it meets the use requirements, it is within the protection scope of this utility model.

Claims

1. A leveling device applicable to high-altitude operations, characterized in that: It includes a boom, a leveling cylinder, a first sprocket, a second sprocket, a roller chain, a platform swing frame, and a working platform; A connecting shaft is set at one end of the platform swing frame, and the connecting shaft is connected to the working platform, and the other end of the platform swing frame is fixedly connected to the first sprocket; the first sprocket and the second sprocket are connected through a roller chain transmission; the leveling cylinder, the second sprocket and the roller chain are arranged inside the arm; the leveling cylinder includes a cylinder barrel and a piston rod, one end of the cylinder barrel of the leveling cylinder is fixedly connected to the arm, and one end of the piston rod of the leveling cylinder is fixedly connected to the roller chain.

2. The leveling device applicable to high-altitude operations according to claim 1, wherein: The leveling device further comprises a swing cylinder, which is arranged on the working platform and the movable end of the swing cylinder is movably connected to the connecting shaft.

3. The leveling device applicable to high-altitude work according to claim 1, characterized in that: The connecting shaft is rotatably connected to the working platform via a pin shaft.

4. The leveling device applicable to high-altitude work according to claim 1, characterized in that: The number of the first sprocket, the second sprocket and the roller chain are all two, the two first sprockets are axially connected, and the two second sprockets are axially connected.

5. The leveling device applicable to high-altitude operations according to claim 1, characterized in that: A sprocket housing is arranged outside the first sprocket, and the sprocket housing is connected to the arm.

6. The leveling device applicable to high-altitude operations according to claim 1, characterized in that: The leveling device further comprises an angle sensor and a controller. The angle sensor is arranged on the working platform, the angle sensor is electrically connected to the controller, and the controller is electrically connected to the leveling cylinder.

7. A fire truck, characterized in that: The fire truck comprises the leveling device according to any one of claims 1-6.

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