Leveling structure of aerial work platform

Abstract

The utility model discloses a leveling structure of aerial work platform, including work platform and jib, the jib end portion is equipped with the first speed reducer who is connected with work platform, one side of first speed reducer is equipped with the first leveling motor who is transmission connection with first speed reducer, work platform bottom is equipped with angle sensor, the jib end portion corresponds to the both ends of first speed reducer and is equipped with the connecting portion, two connecting portion outside are equipped with tripod, the tripod includes the connecting angle who is connected with the first speed reducer exit axle and the flat section who is connected with work platform bottom surface, the tripod can be driven to rotate by first speed reducer. The utility model has can increase the supporting area of speed reducer and work platform, strengthens the stability when leveling, strengthens the structural strength, avoids the characteristics such as the occurrence of dangerous.

Description

Technical Field

[0001] This utility model relates to a leveling structure, specifically a leveling structure for an aerial work platform. Background Technology

[0002] For aerial work platforms using boom luffing mechanisms, the end of the boom structure is connected to a work platform for operators to perform their work. To ensure the safety of personnel or loads on the work platform, the bottom surface of the work platform must be kept as level as possible. The process of adjusting the work platform from an inclined state to a horizontal state is called work platform leveling.

[0003] Chinese patent application CN213505865U discloses an electric leveling device for an aerial work platform, including an angle sensor, a reducer, a motor driving the reducer, and a controller. The reducer is mounted on the boom, with its output end connected to the work platform and its fixed end connected to the motor. Both the angle sensor and the motor are connected to the controller so that the controller can control the motor to rotate based on the deflection angle measured by the angle sensor until the work platform deflects in the opposite direction to be level with the horizontal plane.

[0004] In the aforementioned prior art, the support area between the reducer and the bottom of the work platform (i.e., the operating platform) is small, resulting in poor support stability for the work platform. The work platform itself has a large load, and during actual leveling work, there is a possibility that the support structure may break, leading to a dangerous situation. Utility Model Content

[0005] The purpose of this utility model is to provide a leveling structure for aerial work platforms, which solves the problems of poor support stability and easy danger in the existing technology.

[0006] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a leveling structure for an aerial work platform, comprising a work platform and a boom, wherein a first reducer connected to the work platform is provided at the end of the boom, a first leveling motor connected to the first reducer is provided on one side of the first reducer, an angle sensor is provided at the bottom of the work platform, and connecting parts are provided at both ends of the boom corresponding to the two ends of the first reducer, and a triangular frame is provided on the outer side of each of the two connecting parts. The triangular frame includes a connecting angle connected to the output shaft of the first reducer and a straight section connected to the bottom surface of the work platform, and the triangular frame can be driven to rotate by the first reducer.

[0007] As a further preferred technical solution of this utility model; a positioning cylinder is provided on the outer end face of the connecting part, one side of the tripod abuts against the end face of the positioning cylinder, and the output shaft end of the first reducer is provided with a connecting shaft that passes through the positioning cylinder and connects to the connecting angle.

[0008] As a further preferred technical solution of this utility model, the end of the positioning cylinder connected to the tripod is provided with an annular slider, and the connecting corner end face of the tripod is provided with an annular groove that cooperates with the annular slider.

[0009] As a further preferred technical solution of this utility model; a fixed plate is provided at the top of the straight section of the tripod, a second reducer is provided in the middle of the bottom surface of the fixed plate, a second leveling motor is provided on one side of the second reducer and is connected to the second reducer in a transmission manner, and the output shaft of the second reducer passes through the fixed plate and is connected to the working platform.

[0010] As a further preferred technical solution of this utility model; a limiting block is provided on the side wall of the output shaft end of the second reducer, and an annular fixing block is provided on the bottom surface of the working platform corresponding to the circumference of the output shaft of the second reducer. A limiting groove that cooperates with the limiting block is provided on the inner wall of the annular fixing block, and a connecting plate that is bolted to the annular fixing block is provided on the side wall of the output shaft of the second reducer.

[0011] As a further preferred technical solution of this utility model, the top surface of the fixed plate is provided with an annular slide rail coaxially arranged with the output shaft of the second reducer, and the bottom surface of the working platform is provided with a limiting slider that slides with the annular slide rail.

[0012] As a further preferred technical solution of this utility model, an annular positioning seat is provided at the outer edge of the top surface of the fixed plate, and a plurality of balls are provided on the top of the annular positioning seat. An annular limiting seat is provided on the bottom surface of the working platform above the annular positioning seat and in cooperation with the balls.

[0013] Therefore, this utility model has the characteristics of increasing the support area of ​​the reducer and the working platform, improving the stability during normal operation, strengthening the structural strength, and avoiding the occurrence of danger. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Structural sectional view; Figure 3 yes Figure 2 Enlarged view of the structure at point A in the diagram; Figure 4 yes Figure 2 Enlarged view of the structure at point B in the diagram; Figure 5 yes Figure 1 A cross-sectional view of the structure in which the output shaft of the second reducer mates with the annular fixed block.

[0015] Reference numerals: 1. Working platform; 11. Angle sensor; 12. Annular fixing block; 121. Limiting groove; 13. Limiting slider; 14. Annular limiting seat; 2. Boom; 21. First reducer; 211. Connecting shaft; 22. First leveling motor; 23. Connecting part; 25. Positioning cylinder; 251. Annular slider; 24. Tripod; 241. Connecting angle; 243. Annular slide groove; 242. Straight section; 3. Fixing plate; 31. Second reducer; 311. Limiting block; 312. Connecting plate; 32. Second leveling motor; 33. Annular slide rail; 34. Annular positioning seat; 341. Ball bearings. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] like Figure 1-2As shown, a leveling structure for an aerial work platform includes a work platform 1 and a boom 2. The boom 2 supports the work platform 1 and suspends it at a height. A first reducer 21 connected to the work platform 1 is located at the end of the boom 2. A first leveling motor 22, driven by the first reducer 21, is located on one side of the first reducer 21. Both the first reducer 21 and the first leveling motor 22 are existing technologies. The first reducer 21 and the first leveling motor 22 are connected as a whole to drive the work platform 1 to remain horizontal when suspended, thus achieving a leveling function. An angle sensor 11, also existing technology, is located at the bottom of the work platform 1. The angle sensor 11 measures the angle between the work platform 1 and the horizontal plane, i.e., the deflection angle of the work platform 1, and transmits the measured deflection angle information to an external controller. The external controller controls the first leveling motor 22 and the first reducer 21 to precisely level the work platform. Connecting parts 23 are located at both ends of the boom 2 corresponding to the two ends of the first reducer 21. The two connecting parts 23 connect and fix the two ends of the first reducer 21. Tripods 24 are provided on the outer sides of the connecting part 23. The tripods 24 are triangular frame structures with a hollow center to reduce weight and reduce the structural burden on the end of the boom 2. The tripods 24 include a connecting angle 241 connected to the output shaft of the first reducer 21 and a straight section 242 connected to the bottom surface of the working platform 1. The connecting angle 241 faces downward and connects to the output shaft of the first reducer 21, while the straight section 242 faces upward and connects to the bottom of the working platform 1. The two inclined sides of the tripod 24 face upward and connect to the two ends of the straight section 242, so that when the tripod 24 is fixed, its top... The connection range between the part and the working platform 1 is large, increasing the support range and support area of ​​the working platform 1, and the triangular structure is more stable, thereby effectively strengthening the support strength and stability of the working platform 1. The tripod 24 can be driven to rotate by the first reducer 21. When the first reducer 21 and the first leveling motor 22 are started, the first reducer 21 can drive the tripod 24 to rotate synchronously through the output shaft, and the tripod 24 can drive the working platform 1 to rotate synchronously, thereby realizing the stable leveling action of the working platform 1.

[0018] like Figure 2-3As shown, a positioning cylinder 25 is provided on the outer end face of the connecting part 23. One side of the tripod 24 abuts against the end face of the positioning cylinder 25. One end of the positioning cylinder 25 is connected to the outside of the connecting part 23 by bolts. The output shaft end of the first reducer 21 is provided with a connecting shaft 211 that passes through the positioning cylinder 25 and connects to the connecting angle 241. The connecting shaft 211 is coaxially connected to the output shaft of the first reducer 21 and can be welded or bolted. The connecting shaft 211 passes through the positioning cylinder 25 and connects to the connecting angle 241 of the tripod 24, so that when the first reducer 21 starts, it can drive the tripod 24 to rotate synchronously through the connecting shaft 211. The positioning cylinder 25 and the tripod One end of the connection 24 is provided with an annular slider 251. The end face of the connecting angle 241 of the tripod 24 is provided with an annular groove 243 that cooperates with the annular slider 251. The positioning cylinder 25 limits the installation of the tripod 24 and positions the distance between the two tripods 24 to avoid the distance being too narrow and interfering with the normal rotation of the work platform 1. At the same time, the tripod 24 rotates more smoothly through the cooperation of the annular groove 243 and the annular slider 251, minimizing the frictional wear between the end face of the positioning cylinder 25 and the tripod 24 during rotation, and enhancing the structural reliability of the tripod 24 installed on the connecting shaft 211.

[0019] like Figure 1 , 2As shown in Figure 5, a fixed plate 3 is provided at the top of the straight section 242 of the tripod 24. A second reducer 31 is provided in the middle of the bottom surface of the fixed plate 3. A second leveling motor 32 is provided on one side of the second reducer 31 and is connected to the second reducer 31. The second reducer 31 and the second leveling motor 32 are connected as a whole and can drive the work platform 1 to rotate horizontally. This allows the orientation of the work platform 1 to be adjusted according to different work contents and purposes, facilitating quick work for the workers. The second reducer 31 and the second leveling motor 32 are existing technologies and will not be described in detail here. The second leveling motor 32 can drive the output shaft of the second reducer 31 to rotate, thereby driving the work platform to rotate horizontally. The output shaft of the second reducer 31 passes through the fixed plate 3 and is connected to the work platform 1. A limiting block 311 is provided on the side wall of the output shaft end of the second reducer 31. The limiting block 311 is radially arranged, and the bottom surface of the work platform 1 corresponds to the second reducer. An annular fixing block 12 is provided around the output shaft of the second reducer 31. The annular fixing block 12 is arranged around the output shaft of the second reducer 31. The inner wall of the annular fixing block 12 is provided with a limiting groove 121 that cooperates with the limiting block 311. The limiting groove 121 axially penetrates the annular fixing block 12. The output shaft of the second reducer 31 can be connected to the annular fixing block 12 through the cooperation of the limiting block 311 and the limiting groove 121 to achieve circumferential positioning. This allows the rotation of the output shaft of the second reducer 31 to drive the working platform 1 to rotate stably through the annular fixing block 12. A connecting plate 312 is provided on the side wall of the output shaft of the second reducer 31 and bolted to the annular fixing block 12. The output shaft of the second reducer 31 can be bolted to the annular fixing block 12 through the connecting plate 312 to strengthen the connection and tightness between the output shaft of the second reducer 31 and the annular fixing block 12, and prevent the output shaft of the second reducer 31 from axially separating from the annular fixing block 12.

[0020] like Figure 2 and 4As shown, the top surface of the fixed disk 3 is provided with an annular slide rail 33 coaxially arranged with the output shaft of the second reducer 31. The bottom surface of the working platform 1 is provided with a limiting slider 13 that slides with the annular slide rail 33. The sliding arrangement of the annular slide rail 33 and the limiting slider 13 facilitates the rotational support of the working platform 1, making the rotation of the working platform 1 smoother and more stable. An annular positioning seat 34 is provided at the outer edge of the top surface of the fixed disk 3. The top of the annular positioning seat 34 is provided with several balls 341. The bottom surface of the working platform 1 is provided with an annular limiting seat 14 located above the annular positioning seat 34 and cooperating with the balls 341. The top of the annular positioning seat 34 is provided with a means to accommodate each ball 341. The receiving groove 341 surrounds more than half of the volume of the ball bearing 341, limiting the ball bearing 341 to prevent it from falling out while ensuring its smooth rolling. The annular positioning seat 34 provides rolling support to the annular limiting seat 14 through several ball bearings 341, so that the fixed plate 3 can provide stable support for the working platform 1. This strengthens the support structure of the fixed plate 3 for the working platform 1, ensuring that the working platform 1 rotates more smoothly, while reducing the load on the output shaft of the annular slide rail 33 and the second reducer 31, reducing component wear, and at the same time strengthening the stability and reliability of the support of the tripod 24 and the fixed plate 3 for the working platform 1, ensuring the stability and reliability of the leveling of the working platform 1.

[0021] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A leveling structure for an aerial work platform, comprising a work platform (1) and a boom (2), wherein the end of the boom (2) is provided with a first reducer (21) connected to the work platform (1), and a first leveling motor (22) is provided on one side of the first reducer (21) and drivenly connected to the first reducer (21), and an angle sensor (11) is provided at the bottom of the work platform (1), characterized in that: The boom (2) has a connecting part (23) at both ends corresponding to the first reducer (21). A tripod (24) is provided on the outside of the two connecting parts (23). The tripod (24) includes a connecting angle (241) connected to the output shaft of the first reducer (21) and a straight section (242) connected to the bottom surface of the working platform (1). The tripod (24) can be driven to rotate by the first reducer (21).

2. The leveling structure of the aerial work platform according to claim 1, characterized in that: The outer end face of the connecting part (23) is provided with a positioning cylinder (25), one side of the tripod (24) abuts against the end face of the positioning cylinder (25), and the output shaft end of the first reducer (21) is provided with a connecting shaft (211) that passes through the positioning cylinder (25) and connects to the connecting angle (241).

3. The leveling structure of the aerial work platform according to claim 2, characterized in that: The positioning cylinder (25) is provided with an annular slider (251) at one end connected to the tripod (24), and an annular groove (243) that cooperates with the annular slider (251) is provided on the end face of the connecting angle (241) of the tripod (24).

4. The leveling structure of the aerial work platform according to claim 1, characterized in that: The top of the straight section (242) of the tripod (24) is provided with a fixed plate (3), and a second reducer (31) is provided in the middle of the bottom surface of the fixed plate (3). A second leveling motor (32) is provided on one side of the second reducer (31) and is connected to the second reducer (31) in a transmission. The output shaft of the second reducer (31) passes through the fixed plate (3) and is connected to the working platform (1).

5. The leveling structure of the aerial work platform according to claim 4, characterized in that: The second reducer (31) has a limiting block (311) on the side wall of the output shaft end. The working platform (1) has an annular fixing block (12) on the bottom surface corresponding to the circumference of the output shaft of the second reducer (31). The inner wall of the annular fixing block (12) has a limiting groove (121) that cooperates with the limiting block (311). The output shaft side wall of the second reducer (31) has a connecting plate (312) that is bolted to the annular fixing block (12).

6. The leveling structure of the aerial work platform according to claim 4, characterized in that: The top surface of the fixed plate (3) is provided with an annular slide rail (33) coaxially arranged with the output shaft of the second reducer (31), and the bottom surface of the working platform (1) is provided with a limiting slider (13) that slides with the annular slide rail (33).

7. The leveling structure of the aerial work platform according to claim 4, characterized in that: The fixed plate (3) has an annular positioning seat (34) at the outer edge of the top surface. The annular positioning seat (34) has several balls (341) on its top. The working platform (1) has an annular limiting seat (14) on its bottom surface, which is located above the annular positioning seat (34) and cooperates with the balls (341).

Images