Chassis of aerial work platform

Abstract

The utility model discloses a chassis of an aerial work platform in the field of chassis, which comprises a frame main body, a swing support leg and a swing component, the swing support leg is arranged on the frame main body, and the swing component drives the swing support leg to do outward extension and inward retraction movement relative to the frame main body; the swing assembly comprises an oil cylinder and a connecting rod, the two ends of the oil cylinder are connected with the middle plates on the side walls of the two adjacent swing supporting legs respectively, and the two ends of the connecting rod are connected with the lower bottom plates at the bottoms of the two adjacent swing supporting legs respectively. The frame main body comprises an upper layer cavity and a lower layer cavity, the upper layer cavity is used for placing a hydraulic component of a chassis, and the lower layer cavity is used for placing the connecting rod. The two swing supporting legs are driven by the oil cylinder to swing, the connecting rod is further installed between the two supporting legs, the linkage performance of the two swing supporting legs is improved, swing errors are reduced, the frame body is of a multi-layer structure, the connecting rod is arranged in the lower layer cavity of the frame body, and the ground clearance of a chassis is increased.

Description

Technical Field

[0001] This utility model relates to the field of chassis, and more particularly to a chassis for an aerial work platform. Background Technology

[0002] The current market's large-scale extended-bridge mobile aerial work platforms use an X-shaped swing leg mechanism for their chassis support. The swing of the outriggers is controlled by hydraulic cylinders, with each outrigger connected to a hydraulic cylinder. The swing of the outriggers is achieved by the reciprocating motion of the cylinder piston rod. During operation, the X-shaped outriggers extend; when moving to a different work site or loading / unloading a transport flatbed truck, the X-shaped swing legs retract. Furthermore, when the X-shaped swing legs retract, the approach angle of the extended-bridge aerial work platform decreases, resulting in a reduced climbing ability. For some special unpaved roads, the reduced approach angle severely affects the aerial work platform's passability, making it unable to meet various work conditions. Additionally, when loading / unloading a transport flatbed truck, the platform chassis may collide with the truck, preventing the platform from loading / unloading. Moreover, because each outrigger is controlled individually by a hydraulic cylinder, the swing of the outriggers cannot be synchronized, leading to errors. Utility Model Content

[0003] The purpose of this utility model is to provide a chassis for an aerial work platform, which uses a hydraulic cylinder and a connecting rod to connect two swinging outriggers together, thereby improving the linkage during the swinging process of the two outriggers and reducing the error during linkage.

[0004] To solve the above technical problems, the following technical solution is adopted:

[0005] This utility model provides a chassis for an aerial work platform, including a frame body, swing legs and a swing assembly. The swing legs are mounted on the frame body, and the swing assembly is mounted between the swing legs located on the same side of the frame body.

[0006] The swing assembly includes a hydraulic cylinder and a connecting rod. The two ends of the hydraulic cylinder are respectively connected to the middle plate on the side wall of the adjacent swing leg, and the two ends of the connecting rod are respectively connected to the bottom plate at the bottom of the adjacent swing leg.

[0007] The main body of the frame includes an upper cavity and a lower cavity. The upper cavity is used to house the hydraulic components of the chassis, and the lower cavity is used to house the connecting rod.

[0008] Optionally, at least four swing legs are provided, with each pair forming a group driven by a swing assembly, and the four swing legs are symmetrically installed at the four top corners of the frame body.

[0009] Optionally, the swing outrigger includes a first outrigger, a second outrigger, a third outrigger, and a fourth outrigger; the hydraulic cylinder includes a first hydraulic cylinder and a second hydraulic cylinder; the connecting rod includes a first connecting rod and a second connecting rod; the first hydraulic cylinder and the first connecting rod are installed between the first outrigger and the second outrigger; and the second hydraulic cylinder and the second connecting rod are installed between the third outrigger and the fourth outrigger.

[0010] Optionally, the connecting rod is hinged to the lower base plate, and the hydraulic cylinder is hinged to the intermediate plate.

[0011] Optionally, the lower base plate is disposed at the connection between the swing leg and the frame body.

[0012] Optionally, a wheel assembly is provided at one end of the swing leg away from the frame body.

[0013] Optionally, the frame body includes an upper cover plate, side plates, a middle plate, a reinforcing plate, and a bottom plate. The internal cavity formed by the upper cover plate, the surrounding side plates, and the middle plate is the upper cavity, and the internal space formed by the bottom plate, the surrounding side plates, and the middle plate is the lower cavity. The reinforcing plate is disposed on the side plate to enhance the structural strength.

[0014] Optionally, the connection between the top cover and the side plate, and between the side plates, is made by welding.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0016] The two swing legs of this utility model are driven to swing by a hydraulic cylinder, and a connecting rod is installed between the two legs to improve the linkage between the two swing legs and reduce swing error. The frame body has a multi-layer structure, and the connecting rod is set in the lower cavity of the frame body to increase the ground clearance of the chassis. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the chassis of the aerial work platform in this embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the installation of the hydraulic cylinder and connecting rod in an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the connecting rod installation in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the main frame structure provided in the embodiment of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Wheel assembly; 2. Swinging outrigger; 21. First outrigger; 22. Second outrigger; 23. Third outrigger; 24. Fourth outrigger; 3. Hydraulic cylinder; 4. Frame body; 41. Top cover plate; 42. Side plate; 43. Middle plate; 44. Reinforcing plate; 45. Base plate; 5. Connecting rod. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0025] This embodiment provides a chassis for an aerial work platform, including a frame body 4, swing legs 2, and a swing assembly. The swing legs 2 are mounted on the frame body 4, and the swing assembly is mounted between the swing legs 2 located on the same side of the frame body 4. The swing assembly drives the swing legs 2 on the same side to perform outward and inward movements relative to the frame body 4.

[0026] The swing assembly includes a hydraulic cylinder 3 and a connecting rod 5. The two ends of the hydraulic cylinder 3 are respectively connected to the middle plate on the side wall of the adjacent swing leg 2, and the two ends of the connecting rod 5 are respectively connected to the bottom plate at the bottom of the adjacent swing leg 2.

[0027] The frame body 4 includes an upper cavity and a lower cavity. The upper cavity is used to house the hydraulic components of the chassis, and the lower cavity is used to house the connecting rod 5.

[0028] The two adjacent swing outriggers 2 are connected by a hydraulic cylinder 3 and a connecting rod 5 to form a quadrilateral structure. The two swing outriggers 2 have a high degree of linkage, resulting in a small error when controlling their swing. The frame body 4 has a multi-layer cavity structure. The lower cavity can prevent the connecting rod 5 from moving, and the swing outriggers 2 are also installed in the lower cavity, which makes the bottom of the frame body 4 have a large distance from the ground and high passability. Example 2

[0029] This embodiment provides a chassis for an aerial work platform based on Embodiment 1.

[0030] The swing leg 2 is equipped with a wheel assembly 1 at the end away from the frame body 4.

[0031] There are four swing legs 2: first leg 21, second leg 22, third leg 23, and fourth leg 24. There are two hydraulic cylinders 3: first hydraulic cylinder and second hydraulic cylinder. There are two connecting rods 5: first connecting rod and second connecting rod. The first leg 21 and second leg 22 are connected by the first hydraulic cylinder and the first connecting rod, while the third leg 23 and fourth leg 24 are connected by the second hydraulic cylinder and the second connecting rod. The four legs are symmetrically positioned at the four corners of the frame body 4.

[0032] The fixed end of the first cylinder is hinged to the intermediate plate on the side wall of the first support leg 21, and the telescopic end is hinged to the intermediate plate on the side wall of the second support leg 22. The two ends of the first connecting rod 5 are respectively hinged to the lower base plate at the ends of the first support leg 21 and the second support leg 22. The lower base plate is located at the connection between the support leg and the frame body 4. The lower base plate and the swing support leg 2 are fixedly connected. The lower base plate on the first support leg 21 extends to the side of the support leg, and the lower base plate on the second support leg 22 extends to the end of the support leg. The cylinder 3, the support leg, the connecting rod 5 and the lower base plate form a hexagonal structure. The lower base plate and the support leg are fixedly connected, and the cylinder 3 and the support leg, and the connecting rod 5 and the lower base plate are hinged. Taking the lower base plate and the swing support leg 2 as one side, a quadrilateral connecting rod 5 mechanism is formed, which improves the linkage between the first support leg 21 and the second support leg 22 on the same side, thereby improving the movement accuracy of the expansion and contraction of the first support leg 21 and the second support leg 22.

[0033] The fixed end of the second cylinder is hinged to the intermediate plate on the side wall of the fourth leg 24, and the telescopic end is connected to the intermediate plate on the side wall of the third leg 23. The connecting rod 5 is hinged to the lower base plate on the third leg 23 and the fourth leg 24 respectively. The lower base plate is fixedly connected to the swing leg 2. The cylinder 3, the swing leg 2 and the connecting rod 5 form a quadrilateral connecting rod 5 mechanism, which improves the linkage between the third leg 23 and the fourth leg 24 on the same side, thereby improving the motion accuracy of the expansion and contraction of the bridge of the third leg 23 and the fourth leg 24.

[0034] The frame body 4 includes an upper cover plate 41, side plates 42, a middle plate 43, a reinforcing plate 44, and a bottom plate 45. The cavity formed by the upper cover plate 41, side plates 42, and middle plate 43 is the upper chamber, used to install various hydraulic components of the device. The cavity formed by the side plates 42, middle plate 43, and bottom plate 45 is the lower chamber, used to install the swing outriggers 2 and connecting rods 5. The upper cover plate 41 is welded to the side plates 42, and the side plates 42 are welded together. Reinforcing plates are installed on the side plates 42 to ensure structural strength. Except for the bottom plate 45, the frame body 4 is located above the swing outriggers 2, which increases the distance between the frame body 4 and the ground, resulting in a large ground clearance and good passability. It can be used in some complex road surfaces and in loading and unloading flatbed trucks during transportation.

[0035] In this embodiment, two outriggers are connected by a connecting rod 5. The connecting rod 5, the outriggers, and the hydraulic cylinder 3 form a quadrilateral structure, enabling synchronous movement of the swinging outriggers 2 on the same side. This improves the linkage of the outrigger swing and reduces swing error. The designed frame body 4 has a multi-layer structure, ensuring sufficient installation space for electrical and hydraulic components in the upper cavity while allowing the lower cavity to pass through the connecting rod 5. In this embodiment, the connecting rod 5 is built-in to increase the ground clearance of the chassis structure, improve vehicle passability, meet various complex working conditions, and facilitate transportation.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A chassis for an aerial work platform, characterized in that, It includes a frame body, swing legs, and a swing assembly. The swing legs are mounted on the frame body, and the swing assembly is mounted between the swing legs located on the same side of the frame body. The swing assembly includes a hydraulic cylinder and a connecting rod. The two ends of the hydraulic cylinder are respectively connected to the middle plate on the side wall of the adjacent swing leg, and the two ends of the connecting rod are respectively connected to the bottom plate at the bottom of the adjacent swing leg. The main body of the frame includes an upper cavity and a lower cavity. The upper cavity is used to house the hydraulic components of the chassis, and the lower cavity is used to house the connecting rod.

2. The chassis of the aerial work platform according to claim 1, characterized in that, The swing legs are provided at least four in total, with each pair forming a group driven by a swing assembly. The four swing legs are symmetrically installed at the four top corners of the frame body.

3. The chassis of the aerial work platform according to claim 1, characterized in that, The swing outrigger includes a first outrigger, a second outrigger, a third outrigger, and a fourth outrigger. The hydraulic cylinder includes a first hydraulic cylinder and a second hydraulic cylinder. The connecting rod includes a first connecting rod and a second connecting rod. The first hydraulic cylinder and the first connecting rod are installed between the first outrigger and the second outrigger. The second hydraulic cylinder and the second connecting rod are installed between the third outrigger and the fourth outrigger.

4. The chassis of the aerial work platform according to claim 1, characterized in that, The connecting rod is hinged to the lower base plate, and the hydraulic cylinder is hinged to the intermediate plate.

5. The chassis of the aerial work platform according to claim 1, characterized in that, The lower base plate is located at the connection between the swing leg and the main body of the frame.

6. The chassis of the aerial work platform according to claim 1, characterized in that, The swing leg has a wheel assembly at one end away from the main body of the frame.

7. The chassis of the aerial work platform according to claim 1, characterized in that, The main body of the frame includes an upper cover plate, side plates, a middle plate, a reinforcing plate, and a bottom plate. The internal cavity formed by the upper cover plate, the surrounding side plates, and the middle plate is the upper cavity, and the internal space formed by the bottom plate, the surrounding side plates, and the middle plate is the lower cavity. The reinforcing plate is installed on the side plates to enhance the structural strength.

8. The chassis of the aerial work platform according to claim 7, characterized in that, The connection between the top cover plate and the side plate, and between the side plates, is achieved by welding.

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