Flying arm support, flying arm luffing mechanism and aerial work platform

Abstract

The utility model relates to the technical field of aerial work platforms, in particular to a fly jib support, a fly jib luffing mechanism and an aerial work platform. The two triangular plates are arranged in parallel; the two triangular plates are connected through a connecting plate; four hinge points are arranged on the triangular plate, and three of the four hinge points are arranged at the vertexes of the triangular plate respectively, namely a sixth hinge point, a ninth hinge point and a tenth hinge point; the rest hinge point is an eighth hinge point which is arranged in the middle of the connecting line of the sixth hinge point and the ninth hinge point. According to the fly boom support, through the arrangement of the triangular plate, stress is more reasonable, the moving space of the joint of the main boom and the fly boom is enlarged, the occupied space after contraction is reduced, and storage is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of aerial work platform technology, and in particular to a boom support, boom luffing mechanism and aerial work platform. Background Technology

[0002] The key structures of existing articulated boom aerial work platforms typically include: folding boom, main boom, luffing linkage, luffing cylinder, boom boom, and platform.

[0003] To increase the working range and meet usage requirements, articulated boom lifts require linkage mechanisms. A greater range of motion is achieved by adjusting the length of the luffing links and the position of the hinge points. For example, in a common four-bar linkage, the longer the link, the greater the range of motion at its end; conversely, the shorter the link, the smaller the range of motion. The hinge point position determines the starting and ending positions of the linkage movement. In other words, the link length and hinge point position affect the luffing range of the main boom and boom, as well as the overall height of the machine, thus impacting transportation and construction in confined spaces. Furthermore, during force transmission, the link length affects the amplification or reduction of force, and changes in the hinge point position alter the direction and lever arm of the force. In the design of articulated boom lifts, increasing cylinder thrust often involves simply increasing the cylinder diameter, which not only increases weight and cost but also fails to achieve the desired effect. Therefore, the design of the main boom and boom is a major challenge in the design of articulated boom lifts.

[0004] For example, patent CN214495634U discloses a boom for an aerial work platform and an aerial work platform, including: a folding boom and a main boom, both hinged at a first hinge point; a first connecting member, one end of which is hinged to the folding boom; a second connecting member, one end of which is hinged to the main boom; the other end of the second connecting member is hinged to the first connecting member at a second hinge point, the folding boom, the main boom, the first connecting member and the second connecting member forming a first four-bar linkage; a main boom luffing cylinder, one end of which is hinged to the first connecting member at a third hinge point, and the other end of which is hinged to the main boom at a fourth hinge point, the angle between the line connecting the third hinge point and the fourth hinge point and the main boom is greater than the angle between the line connecting the second hinge point and the fourth hinge point and the main boom.

[0005] In this design, the boom luffing mechanism connects the platform through two linkages, resulting in a large angle between the platform and the main boom even when the platform is in the retracted state. This occupies a large volume, making the aerial work platform bulky when retracted and difficult to store. Utility Model Content

[0006] To address the problem that current boom luffing mechanisms connect the platform via two linkages, resulting in a large angle between the platform and the main boom even when the platform is retracted, thus occupying a large volume and making the aerial work platform bulky and difficult to store when retracted, this utility model provides a boom support, a boom luffing mechanism, and an aerial work platform.

[0007] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0008] A boom support includes two spaced-apart triangular plates; the two triangular plates are arranged parallel to each other; the two triangular plates are connected by a connecting plate; four hinge points are provided on the triangular plates, three of which are located at the vertices of the triangular plates, namely the sixth, ninth, and tenth hinge points; the remaining hinge point is the eighth hinge point, located at the midpoint of the line connecting the sixth and ninth hinge points. This boom support, through the arrangement of the triangular plates, achieves more reasonable force distribution, increases the movement space at the connection between the main boom and the boom, reduces the volume occupied after retraction, and facilitates storage.

[0009] Preferably, the eighth hinge point is located at the midpoint of the line connecting the sixth and ninth hinge points. This further ensures reasonable force distribution.

[0010] Preferably, the triangular plate has a perforated hole in the middle; a reinforcing plate is fixedly installed on one side of the triangular plate; the reinforcing plate is located on the sides where the sixth, eighth, and ninth hinge points are located. Based on the direction of force transmission, the perforated hole design reduces weight while ensuring the strength of the flying arm support.

[0011] A boom luffing mechanism includes a boom support as described above; the boom luffing mechanism also includes a main boom; the main boom is hinged to a third link via a fifth hinge point; a fourth link is hinged to the end of the third link away from the main boom; the third link and the fourth link are hinged at a seventh hinge point; the end of the fourth link away from the seventh hinge point is hinged to the boom support at a fifth hinge point; the boom support is hinged to the main boom at a sixth hinge point; the cylinder body of a first luffing cylinder is hinged to the main boom; the piston rod of the first luffing cylinder is hinged to the third link and the fourth link at a seventh hinge point; a boom is hinged to the boom support at a tenth hinge point; the boom support is also hinged to a second luffing cylinder at a ninth hinge point; the piston rod of the second luffing cylinder is hinged to the boom. This optimized boom luffing mechanism ensures sufficient space for movement at the connection between the main boom and the boom, reduces the space occupied by the boom when retracted below the main boom, and facilitates storage.

[0012] An aerial work platform includes the aforementioned boom luffing mechanism; the platform also includes a turntable; a folding boom is hinged to the turntable; the cylinder body of a folding boom luffing cylinder is also hinged to the turntable; the piston rod of the folding boom luffing cylinder is hinged to the folding boom; a main boom is hinged to the upper end of the folding boom; a main boom luffing mechanism is provided between the folding boom and the main boom; a folding boom is hinged to the end of the main boom away from the folding boom via the boom luffing mechanism; and a platform is hinged to the end of the folding boom away from the boom luffing mechanism via a platform leveling mechanism. This aerial work platform, through the rational arrangement of the boom luffing mechanism, the main boom luffing mechanism, and the platform leveling mechanism, can reduce the space occupied in the retracted state, which is beneficial for storage.

[0013] Preferably, the platform leveling mechanism includes a leveling bracket; a flying arm is hinged to the upper left end of the leveling bracket and hinged at the thirteenth hinge point; the platform is hinged to the right end of the leveling bracket; a leveling cylinder is hinged to the flying arm; the cylinder body of the leveling cylinder is hinged to the flying arm, and the piston rod of the leveling cylinder is hinged to a sixth connecting rod and hinged at the twelfth hinge point; the end of the sixth connecting rod away from the leveling cylinder is hinged to the leveling bracket; the sixth connecting rod is hinged to a fifth connecting rod and hinged at the twelfth hinge point.

[0014] Preferably, the sixth link is hinged to the leveling bracket at the fourteenth hinge point, which is located at the lower left end of the leveling bracket.

[0015] Preferably, the leveling bracket has a through hole on the right side; the through hole is arranged from top to bottom; the platform has a U-shaped hinge seat on the left side; the U-shaped hinge seat is hinged in the through hole by a pin.

[0016] Preferably, the boom luffing mechanism includes a first link; the first link is hinged to the folding arm at a second hinge point; a boom luffing cylinder is hinged to the end of the first link away from the folding arm; the piston rod of the boom luffing cylinder is hinged to the first link at a fourth hinge point; the cylinder body of the boom luffing cylinder is hinged to the boom; a second link is hinged to the first link at a third hinge point; the end of the second link away from the first link is hinged to the boom at the first hinge point.

[0017] Preferably, the third hinge point is located at the midpoint of the line connecting the second hinge point and the fourth hinge point.

[0018] As can be seen from the above technical solutions, the advantages of this utility model include: the triangular plate design of the boom support makes the force distribution more reasonable, increases the movement space at the connection between the main boom and the boom, and reduces the volume occupied after retraction, which is beneficial for storage. The reasonable design of the boom luffing mechanism ensures sufficient movement space at the connection between the main boom and the boom, reduces the space occupied when the boom is retracted below the main boom, and is also beneficial for storage. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the flying arm support of this utility model;

[0021] Figure 2 This is a side view of the flying arm support structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the aerial work platform of this utility model;

[0023] Figure 4 This is a schematic diagram of the main boom luffing mechanism of this utility model;

[0024] Figure 5 This is a schematic diagram of the usage state of the boom luffing mechanism of this utility model. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the usage state of the boom luffing mechanism of this utility model. Figure 2 ;

[0026] Figure 7 This is a schematic diagram of the usage state of the boom luffing mechanism of this utility model. Figure 3 ;

[0027] Figure 8 This is a schematic diagram of the platform leveling mechanism of this utility model.

[0028] Explanation of reference numerals in the attached drawings: 1-turntable, 2-folding boom, 3-folding boom luffing cylinder, 4-main boom luffing mechanism, 5-main boom luffing cylinder, 6-main boom, 7-first luffing cylinder, 8-flying boom luffing mechanism, 9-second luffing cylinder, 10-flying boom, 11-leveling cylinder, 12-platform leveling mechanism, 13-platform;

[0029] 4.1-First Linkage, 4.2-Second Linkage; 8.1-Third Linkage, 8.2-Fourth Linkage, 8.3-Flying Arm Support; 8.3.1-Triangle Plate, 8.3.2-Connecting Plate, 8.3.3-Hollow Hole, 8.3.4-Reinforcing Plate; 12.1-Fifth Linkage, 12.2-Sixth Linkage, 12.3-Leveling Support; O1-First Hinge Point, O2-Second Hinge Point, O3-Third Hinge Point, O4-Fourth Hinge Point, O5-Fifth Hinge Point, O6-Sixth Hinge Point, O7-Seventh Hinge Point, O8-Eighth Hinge Point, O9-Ninth Hinge Point, O10-Tenth Hinge Point, O11-Eleventh Hinge Point, O12-Twelfth Hinge Point, O13-Thirteenth Hinge Point, O14-Fourteenth Hinge Point. Detailed Implementation

[0030] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0031] Example 1

[0032] like Figure 1 and Figure 2 As shown, a boom support includes two spaced-apart triangular plates 8.3.1; the two triangular plates 8.3.1 are arranged parallel to each other; the two triangular plates 8.3.1 are connected by a connecting plate 8.3.2; four hinge points are provided on the triangular plates 8.3.1, three of which are located at the vertices of the triangular plates 8.3.1, namely the sixth hinge point O6, the ninth hinge point O9, and the tenth hinge point O10; the remaining hinge point is the eighth hinge point O8, which is located at the midpoint of the line connecting the sixth hinge point O6 and the ninth hinge point O9. A hollow hole 8.3.3 is provided in the middle of the triangular plate 8.3.1; a reinforcing plate 8.3.4 is fixedly provided on one side of the triangular plate 8.3.1; the reinforcing plate 8.3.4 is located on the side where the sixth hinge point O6, the eighth hinge point O8, and the ninth hinge point O9 are located.

[0033] The triangular plate 8.3.1 has four hinge points: the sixth hinge point O6, the eighth hinge point O8, the ninth hinge point O9, and the tenth hinge point O10. Hinges O6, O9, and O10 are located at the three vertices of the triangle formed by the triangular plate 8.3.1. The eighth hinge point O8 is located on the side where hinges O6 and O9 are located, and a reinforcing plate 8.3.4 is welded to this side to increase strength and reduce stress. When the platform 13 is leveling while bearing heavy loads, the triangular structure of the boom support 8.3 provides a more reasonable stress distribution. Based on the direction of force transmission, a triangular perforation 8.3.3 is provided in the middle of the triangular plate 8.3.1, which reduces weight while maintaining sufficient strength.

[0034] Example 2

[0035] like Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, a boom luffing mechanism includes a boom support 8.3 as described in Embodiment 1; the boom luffing mechanism also includes a main boom 6; the main boom 6 is hinged to a third link 8.1 via a fifth hinge point 05; a fourth link 8.2 is hinged to the end of the third link 8.1 away from the main boom 6; the third link 8.1 and the fourth link 8.2 are hinged at a seventh hinge point O7; the end of the fourth link 8.2 away from the seventh hinge point O7 is hinged to the boom support 8.3 at an eighth hinge point O8; the boom... The boom support 8.3 is hinged to the main boom 6 at the sixth hinge point O6; the cylinder body of the first luffing cylinder 7 is hinged to the main boom 6; the piston rod of the first luffing cylinder 7 is hinged to the third connecting rod 8.1 and the fourth connecting rod 8.2 at the seventh hinge point O7; the boom support 8.3 is hinged to the boom 10 at the tenth hinge point O10; the boom support 8.3 is also hinged to the second luffing cylinder 9 at the ninth hinge point O9; the piston rod of the second luffing cylinder 9 is hinged to the boom 10. This reasonable arrangement of the boom luffing mechanism ensures sufficient space for movement at the connection between the main boom 6 and the boom 10, reduces the space occupied by the boom 10 when retracted below the main boom 6, and facilitates storage.

[0036] The boom luffing mechanism 8 includes a third link 8.1, a fourth link 8.2, and a boom support 8.3. One end of the third link 8.1 is hinged to the main boom 6 at the fifth hinge point O5, and the other end is hinged to the fourth link 8.2 at the seventh hinge point O7. The other end of the fourth link 8.2 is hinged to the boom support 8.3 at the eighth hinge point O8. The boom support 8.3 is hinged to the main boom 6 at the sixth hinge point O6. One end of the boom's first luffing cylinder 7 is hinged to the main boom 6, and the other end is hinged to the third link 8.1 at the seventh hinge point O7. The function of the boom support 8.3 is to connect the main boom 6 and the boom 10. It not only increases the luffing range of the boom 10, but more importantly, it allows the boom 10 to be tilted and retracted. When the first luffing cylinder 7 retracts, it drives the third link 8.1, the fourth link 8.2, and the boom support 8.3 to rotate 106° inwards around the fifth hinge point O5 and the sixth hinge point O6. When fully retracted, the boom 10 is in a fully retracted state. At this point, the highest point of the entire machine is at the very front of the main boom 6, significantly reducing the overall height and length of the machine, which meets the needs of conventional container transportation. The height of the fifth hinge point O5 affects the retraction angle of the boom 10. If the fifth hinge point O5 is set too low, it will cause interference between the boom support and the main boom 6 when tilted and retracted, failing to achieve the ideal retraction and transportation effect. On the other hand, increasing the height of the fifth hinge point O5 is equivalent to increasing the lever arm d of the first luffing cylinder 7 of the boom. Therefore, under the same torque requirement, the force required by the first luffing cylinder 7 of the boom can be reduced, thereby reducing the size of the first luffing cylinder 7 of the boom. The function of the third link 8.1 and the fourth link 8.2 is to connect the main boom 6, the boom support 8.3 and the first luffing cylinder 7 of the boom, changing the direction of the force during movement to realize the movement of the boom 10. If the first luffing cylinder 7 of the boom is directly connected to the boom support 8.3, in order to make the boom support 8.3 achieve the same range of motion, a longer first luffing cylinder 7 of the boom needs to be designed. In order to meet the extension ratio of the cylinder, the hinge point between the first luffing cylinder 7 of the boom and the main boom 6 needs to be moved into the main boom 6, making assembly and maintenance difficult. In addition, the boom support 8.3 is connected to the first luffing cylinder 7 of the boom through the third link 8.1 and the fourth link 8.2. The link and the cylinder form a more stable support structure, which can help the first luffing cylinder 7 of the boom to share some of the force. This can prevent the first luffing cylinder 7 of the boom from bearing too much force alone, reduce the risk of damage to the first luffing cylinder 7 of the boom, and extend the service life of the equipment.

[0037] The length of the third link 8.1 is greater than that of the fourth link 8.2, which is equivalent to increasing the transmission angle γ of the third link 8.1. As the length of the fourth link 8.2 increases, the transmission angle γ of the third link 8.1 approaches 0°, and the transmission performance of the luffing mechanism deteriorates. When the seventh hinge point O7, the sixth hinge point O6, and the eleventh hinge point O11 are on a straight line, the mechanism is in a dead position. The distance between the eighth hinge point O8 and the sixth hinge point O6 is greater than the distance between the eighth hinge point O8 and the ninth hinge point O9, which is equivalent to increasing the transmission angle θ of the fourth link 8.2. As the distance between the eighth hinge point O8 and the sixth hinge point O6 increases, the transmission angle θ of the fourth link 8.2 becomes larger, and the transmission performance of the luffing mechanism improves. The boom 10 and the second luffing cylinder 9 of the boom are connected through the boom bracket 8.3 to form a three-point luffing mechanism, further increasing the range of motion of the boom 10.

[0038] Example 3

[0039] like Figure 3 , Figure 4 and Figure 8 As shown, an aerial work platform includes: a turntable 1, a folding boom 2, a folding boom luffing cylinder 3, a main boom luffing mechanism 4, a main boom luffing cylinder 5, a main boom 6, a first luffing cylinder for the boom 7, a boom luffing mechanism 8, a second luffing cylinder for the boom 9, a boom 10, a leveling cylinder 11, a platform leveling mechanism 12, and a platform 13.

[0040] The turntable 1 serves as the basic structure, connecting the articulated boom 2 and the chassis. One end of the articulated boom 2 is hinged to the turntable 1, and one end of the articulated boom luffing cylinder 3 is hinged to the turntable 1, while the other end is hinged to the articulated boom 2. Under the action of the articulated boom luffing cylinder 3, the articulated boom 2 moves upward or downward, driving the main boom 6, the boom 10, and the platform 13 to move together. The articulated boom 2 and the main boom 6 are not limited to hydraulic drive; they can be driven by hydraulic cylinders, or by a combination of hydraulic cylinders and wire ropes or chains. The number of sections in the articulated boom 2, the main boom 6, and the boom 10 is not limited to two sections; they can be three or four sections.

[0041] The main boom luffing mechanism 4 includes a first connecting rod 4.1 and a second connecting rod 4.2. One end of the first connecting rod 4.1 is hinged to the folding arm 2 at a second hinge point O2, and the other end is hinged to the second connecting rod 4.2 at a third hinge point O3. The other end of the second connecting rod 4.2 is hinged to the main boom 6 at a first hinge point O1. One end of the main boom luffing cylinder 5 is hinged to the main boom 6, and the other end is hinged to the first connecting rod 4.1 at a fourth hinge point O4.

[0042] When the boom luffing cylinder 5 is hinged to the first connecting rod 4.1 at the fourth hinge point O4, the transmission angle is α1. When the boom luffing cylinder 5 is hinged to the first connecting rod 4.1 at the third hinge point O3, the transmission angle is α2. It can be clearly seen that α1 > α2, indicating that the connection between the boom luffing cylinder 5 and the first connecting rod 4.1 at the fourth hinge point O4 is more conducive to the transmission of cylinder force. The transmission angle is an important indicator for measuring the transmission performance of the mechanism. In mechanical transmission, the larger the transmission angle, the larger the effective component force. A large transmission angle can increase the proportion of the effective component force, thereby transmitting power more effectively, reducing energy loss, and improving mechanical efficiency. Furthermore, a larger transmission angle can make the movement of the mechanism smoother and reduce impact and vibration.

[0043] Similarly, as can be seen, Figure 4 As shown, when the main boom luffing cylinder 5 is hinged to the first connecting rod 4.1 at the fourth hinge point O4, the lever arm is L1. When the main boom luffing cylinder 5 is hinged to the first connecting rod 4.1 at the third hinge point O3, the lever arm is L2. It can be clearly seen that L1 > L2. That is, under the same torque requirement, the force required by the main boom luffing cylinder 5 can be reduced, thereby reducing the cylinder diameter of the main boom luffing cylinder 5. The main boom luffing cylinder 5 is lighter, occupies less space when stored, and has a smaller overall height, making it easier to transport.

[0044] The platform leveling mechanism 12 includes a fifth link 12.1, a sixth link 12.2, and a leveling bracket 12.3. One end of the fifth link 12.1 is hinged to the flying arm 10 at the eleventh hinge point O11, and the other end is hinged to the sixth link 12.2 at the twelfth hinge point O12. The other end of the sixth link 12.2 is hinged to the leveling bracket 12.3 at the fourteenth hinge point O14, and the leveling bracket 12.3 is hinged to the flying arm 10 at the thirteenth hinge point O13. One end of the leveling cylinder 11 is hinged to the flying arm 10, and the other end is hinged to the fifth link 12.1 at the twelfth hinge point O12.

[0045] The function of the leveling bracket 12.3 is to connect the platform 13 and the flying arm 10, and to keep the platform 13 level with the ground through the platform leveling mechanism 12.

[0046] Under the action of the fifth link 12.1 and the sixth link 12.2, the leveling bracket 12.3 has a larger range of motion. That is, while the boom luffing mechanism 8 increases the range of motion of the boom 10, the platform 13 has sufficient adjustment range to keep the platform 13 level with the ground. Similar to the boom luffing mechanism 8, the platform leveling mechanism 12 also plays a supporting role, helping the leveling cylinder 11 to share some of the force, making the leveling movement of the platform 13 more stable, reducing impact and vibration, and also preventing the leveling cylinder 11 from bearing excessive force alone, reducing the risk of cylinder damage and extending the service life of the equipment.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fly jib support, characterised in that, The two triangular plates (8.3.1) are arranged in parallel; the two triangular plates (8.3.1) are connected through the connecting plate (8.3.2); the triangular plate (8.3.1) is provided with four hinge points, three of which are arranged at the vertices of the triangular plate (8.3.1), respectively, the sixth hinge point (O6), the ninth hinge point (O9) and the tenth hinge point (O10); the remaining one is the eighth hinge point (O8), which is arranged at the midpoint of the line connecting the sixth hinge point (O6) and the ninth hinge point (O9).

2. The jib support of claim 1, wherein, The eighth hinge point (O8) is arranged at the midpoint of the line connecting the sixth hinge point (O6) and the ninth hinge point (O9).

3. The jib support of claim 1, wherein, The triangular plate (8.3.1) is provided with a hollow hole (8.3.3) in the middle; the triangular plate (8.3.1) is fixedly provided with a reinforcing plate (8.3.4) on one side edge; the reinforcing plate (8.3.4) is arranged on the edge where the sixth hinge point (O6), the eighth hinge point (O8) and the ninth hinge point (O9) are located.

4. A jib luffing mechanism characterized by comprising: The boom luffing mechanism (8) of any one of claims 1-3; the boom luffing mechanism further comprises a main arm (6); the main arm (6) is hingedly connected with a third connecting rod (8.1) through a fifth hinge point (O5); one end of the third connecting rod (8.1) away from the main arm (6) is hingedly connected with a fourth connecting rod (8.2); the third connecting rod (8.1) and the fourth connecting rod (8.2) are hingedly connected at a seventh hinge point (O7); one end of the fourth connecting rod (8.2) away from the seventh hinge point (O7) is hingedly connected with the boom support (8.3) at an eighth hinge point (O8); the boom support (8.3) is hingedly connected with the main arm (6) at a sixth hinge point (O6); the main arm (6) is hingedly connected with a cylinder body of a first luffing oil cylinder (7); a piston rod of the first luffing oil cylinder (7) is hingedly connected with the third connecting rod (8.1) and the fourth connecting rod (8.2) at the seventh hinge point (O7); the boom support (8.3) is hingedly connected with a boom (10) at a tenth hinge point (O10); the boom support (8.3) is further hingedly connected with a second luffing oil cylinder (9) at a ninth hinge point (O9); a piston rod of the second luffing oil cylinder (9) is hingedly connected with the boom (10).

5. An aerial work platform, characterized in that The boom luffing mechanism (8) of claim 4; the aerial work platform further comprises a rotating platform (1); the rotating platform (1) is hingedly connected with a folding arm (2); the rotating platform (1) is further hingedly connected with a cylinder body of a folding arm luffing oil cylinder (3); a piston rod of the folding arm luffing oil cylinder (3) is hingedly connected with the folding arm (2); an upper end of the folding arm (2) is hingedly connected with a main arm (6); the folding arm (2) and the main arm (6) are provided with a main arm luffing mechanism (4) therebetween; one end of the main arm (6) away from the folding arm (2) is hingedly connected with a boom (10) through the boom luffing mechanism (8); one end of the boom (10) away from the boom luffing mechanism (8) is hingedly connected with a platform (13) through a platform leveling mechanism (12).

6. The aerial work platform of claim 5, wherein, The platform leveling mechanism (12) comprises a leveling support (12.3); the leveling support (12.3) is hingedly connected to the boom (10) at the upper left end of the leveling support (12.3) and at the thirteenth hinge point (O13); the leveling support (12.3) is hingedly connected to the platform (13) at the right end of the leveling support (12.3); the leveling oil cylinder (11) is hingedly connected to the boom (10); the piston rod of the leveling oil cylinder (11) is hingedly connected to the sixth connecting rod (12.2) and at the twelfth hinge point (O12); the sixth connecting rod (12.2) is hingedly connected to the leveling support (12.3) at the end of the sixth connecting rod (12.2) away from the leveling oil cylinder (11); the sixth connecting rod (12.2) is hingedly connected to the fifth connecting rod (12.1) at the twelfth hinge point (O12).

7. The aerial work platform according to claim 6, characterized in that The sixth connecting rod (12.2) is hingedly connected to the leveling support (12.3) at the fourteenth hinge point (O14), and the fourteenth hinge point (O14) is arranged at the lower left end of the leveling support (12.3).

8. The aerial work platform of claim 7, wherein, The right part of the leveling support (12.3) is provided with a through hole; the through hole is arranged from top to bottom; the left part of the platform (13) is provided with a U-shaped hinge seat; the U-shaped hinge seat is hingedly connected to the through hole by means of a pin shaft.

9. The aerial work platform of claim 5, wherein, The main arm luffing mechanism (4) comprises a first connecting rod (4.1); the first connecting rod (4.1) is hingedly connected to the folding arm (2) at the second hinge point (O2); the first connecting rod (4.1) is hingedly connected to the main arm luffing oil cylinder (5) at the end of the first connecting rod (4.1) away from the folding arm (2); the piston rod of the main arm luffing oil cylinder (5) is hingedly connected to the first connecting rod (4.1) at the fourth hinge point (O4); the cylinder body of the main arm luffing oil cylinder (5) is hingedly connected to the main arm (6); the first connecting rod (4.1) is hingedly connected to the second connecting rod (4.2) at the third hinge point (O3); the second connecting rod (4.2) is hingedly connected to the main arm (6) at the end of the second connecting rod (4.2) away from the first connecting rod (4.1) and at the first hinge point (O1).

10. The aerial work platform of claim 9, wherein, The third hinge point (O3) is arranged at the midpoint of the line connecting the second hinge point (O2) and the fourth hinge point (O4).

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