Tracked aerial work platform

Abstract

This invention relates to the field of aerial work platform technology, particularly tracked aerial work platforms, comprising a chassis assembly with an internal power unit and a hydraulic station mounted on the chassis assembly. The invention is characterized by: a track assembly mounted on the chassis assembly; a low-position slewing bearing fixedly mounted at the top center of the chassis assembly; a bottom base fixedly mounted on the top of the rotating part of the low-position slewing bearing; a support frame mounted on the top of the bottom base; a scissor lift body mounted on the top of the support frame; a load-bearing working component mounted on the top of the scissor lift body; and a leveling support mechanism fixedly mounted on the side plates at both ends of the main frame of the chassis assembly. The aerial work platform of this invention employs a tracked structure at the bottom, allowing for stable movement under load conditions, exhibiting strong overall operational stability and a certain climbing ability.

Description

Technical Field

[0001] This invention relates to the field of aerial work platform technology, and particularly to a stable tracked aerial work platform that is suitable for various working conditions and road surfaces, especially a tracked aerial work platform. Background Technology

[0002] Aerial work platforms are specialized vehicles used to transport workers and equipment to the site for aerial work. Traditional aerial work platforms are distinguished by their lifting mechanisms. Furthermore, live-line work using aerial work platforms can be achieved through either insulated or insulated tools. Generally, the indirect method involves using insulated tools as the primary insulation and insulated clothing as supplementary insulation.

[0003] Currently, there are various types of aerial work platforms with different structures in existing technologies. They can generally be divided into four basic types: telescopic boom, folding boom, vertical lift, and hybrid.

[0004] For example, patent document CN201420348600.2 discloses a hydraulic aerial work platform, the main structure of which includes a vehicle body, a lifting mechanism installed on the vehicle body, and a working platform on the lifting mechanism. The drive system of the hydraulic aerial work platform is a hydraulic system installed in the vehicle body. The hydraulic system includes an oil source circuit, a lifting circuit, a steering circuit, a travel circuit, and a braking circuit. The oil source circuit includes a DC motor and a hydraulic pump, with the DC motor and hydraulic pump combined together via a coupling. The oil source circuit also includes a one-way valve and a relief valve connected to the hydraulic pump via pipelines. The lifting circuit starts from the hydraulic pump, sequentially connects to a second solenoid ball valve, a third solenoid ball valve, and a one-way throttle valve, reaches the lifting cylinder, returns from the lifting cylinder, and connects to the oil tank, forming a circuit; ..., the first and second travel motors are installed on the two rear wheels of the vehicle body; the braking circuit starts from the hydraulic pump, passes through a shuttle valve to the first and second brake cylinders, then returns from the first and second brake cylinders, passes through a reversing valve, and returns to the oil tank, forming a circuit; the first and second brake cylinders are installed in the two rear wheels of the vehicle body.

[0005] As can be seen from the contents recorded in the aforementioned prior art patents, the hydraulic aerial work platform mainly adopts a wheeled structure. While reducing the turning radius of the vehicle to meet the needs of domestic airport equipment, it is mainly used in indoor environments. Its overall outdoor operation capability is poor, and it cannot be used for construction work on power transmission lines on bumpy outdoor roads.

[0006] Therefore, this invention optimizes the existing technology to address the problems existing in the prior art, and specifically designs a stable tracked aerial work vehicle that can be applied to various working conditions and road surfaces, in order to better solve the problems existing in the prior art. Summary of the Invention

[0007] To solve one of the aforementioned technical problems, the present invention employs the following technical solution: a tracked aerial work platform, comprising a chassis assembly with an internal power unit, a hydraulic station mounted on the chassis assembly, a track assembly mounted on the chassis assembly, a low-position slewing bearing fixedly mounted at the top center of the chassis assembly, a bottom base fixedly mounted on the top of the rotating part of the low-position slewing bearing, a support frame mounted on the top of the bottom base, a scissor lift body mounted on the top of the support frame, and a load-bearing work assembly mounted on the top of the scissor lift body. The load-bearing work assembly is used to carry people and goods, and allows workers to perform aerial work inside it. A leveling support mechanism is fixedly mounted on the side plates at both ends of the main frame of the chassis assembly. Each leveling support mechanism, in conjunction with the track assembly, enables the load-bearing work assembly to be leveled even on uneven ground.

[0008] In any of the above embodiments, it is preferred that the leveling support mechanism includes a ground support cylinder fixedly installed on a side plate seat at a corresponding position of the main frame. The top of the ground support cylinder is movably hinged to a fixed support main shaft on the side plate seat via a fixed lug. A ground support foot is hinged to the bottom of the piston rod of the ground support cylinder. The ground support foot abuts against the ground in the working state.

[0009] In any of the above solutions, it is preferred that an inclined support member is symmetrically provided on each of the side plate seats on both sides of the ground support cylinder, and the inclined support member cooperates to support and position the cylinder body of the ground support cylinder in the inclined state.

[0010] The inclined support includes a diagonal brace positioning lug fixedly installed on the side plate seat. A side support auxiliary cylinder is hinged to the bottom of the diagonal brace positioning lug, and the piston rod of the side support auxiliary cylinder is hinged to the cylinder side wall of the side support auxiliary cylinder.

[0011] In any of the above embodiments, preferably, the load-bearing operation component includes a limiting protective cylinder fixedly installed on the top of the scissor lift body, an extension seat fixedly welded to each of the top two sides of the limiting protective cylinder, a high-level slewing bearing fixedly installed at the bottom of the mounting cavity of the limiting protective cylinder, a cylindrical personnel basket fixedly installed on the top of the rotating part of the high-level slewing bearing, the inside of the cylindrical personnel basket being used for carrying people and goods, and a lifting extension mechanism installed on the upper left and right sides of the cylindrical personnel basket, each of the lifting extension mechanisms being used to realize platform raising operations or side-connection operations.

[0012] Using a low-position slewing bearing in conjunction with a high-position slewing bearing allows for better control of rotation and faster positioning.

[0013] In any of the above embodiments, it is preferred that a plurality of support columns are fixedly installed at even intervals along the circumference of the bottom of the cylindrical manned protective basket, and a support guide ball is respectively engaged in the groove at the bottom of each support column, and each support guide ball is supported on the top of the fixed part of the high-position slewing bearing.

[0014] In any of the above embodiments, it is preferred that the lifting extension mechanism includes a swing seat disposed at the corresponding side wall opening of the cylindrical manned protective basket. The bottom ends of the swing seat are respectively hinged to the front and rear side walls of the cylindrical manned protective basket at corresponding positions via hinge shafts. The upper part of the swing seat is movably inserted into the pin hole at the corresponding side wall position via a quick-pluggable long pin shaft. A swing support assembly is installed on the top of the extension seat below the outer side of the swing seat. The swing support assembly is used to adjust the tilt angle of the swing seat and support its outer bottom in a horizontal state.

[0015] In any of the above embodiments, preferably, the swing support assembly includes an inclined multi-stage telescopic adjustment cylinder. The bottom of the cylinder barrel of the multi-stage telescopic adjustment cylinder is hinged to a welded lug fixed to the top of the extension seat, and the bottom of the piston rod is movably hinged to a swing lug welded and fixed to the middle outer wall of the swing seat. A distal support cylinder is fixedly installed on the top of the extension seat outside the swing seat. A distal support seat is fixedly installed on the top of the piston rod of the distal support cylinder. The top of the distal support seat abuts against the bottom of the swing seat when it is adjusted to a horizontal state.

[0016] In any of the above embodiments, it is preferred that an L-shaped climbing foot pedal tool box is fixedly installed on the left and right sides of the bottom of the bearing cavity of the cylindrical manned protective basket, and the L-shaped climbing foot pedal tool box is hollow inside and has an open inner end face.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The aerial work platform vehicle of this invention adopts a tracked structure at the bottom, which can move smoothly under load conditions when the whole vehicle is moving, with strong overall operation stability and a certain climbing ability.

[0019] 2. This tracked aerial work platform can achieve stable bottom support in working condition. At the same time, the four leveling support mechanisms on both sides of the track can cope with the bottom support on uneven terrain. By controlling the lifting, tilting and leveling angle of each leveling support mechanism, the chassis assembly and its top structure can be more stably leveled, thus ensuring stable leveling support on uneven road conditions and ensuring a flat state during aerial operations.

[0020] 3. Slewing bearings are installed at the top of the chassis assembly and the bottom of the load-bearing working components. The combination of low and high slewing bearings can achieve a faster rotation response, ensuring smoothness and speed during overall relocation. In addition, the rotation method can facilitate the operation of the supported operator to carry out work at multiple locations around the chassis as needed.

[0021] 4. The main purpose of setting up lifting extension mechanisms on the left and right sides of the cylindrical manned protective basket is to provide a transitional connection when it is necessary to connect to the adjacent work platform, allowing operators to move up to the high-altitude operating tower where maintenance and construction are required for on-site work. In addition, it also serves to increase the overall lifting range. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0023] Figure 1 This is a schematic diagram of the tracked aerial work vehicle of the present invention in a stationary state.

[0024] Figure 2 This is a schematic diagram of the structure of the present invention in its working state.

[0025] In the diagram, 1. Chassis assembly; 2. Hydraulic station; 3. Track assembly; 4. Low-position slewing bearing; 5. Bottom base; 6. Support frame; 7. Scissor lift body; 8. Side plate seat; 9. Main frame; 10. Ground support cylinder; 11. Fixed lug; 12. Fixed support spindle; 13. Ground support foot; 14. Diagonal brace positioning lug; 15. Side support auxiliary cylinder; 16. Limiting and protective cylinder; 17. Extension seat; 18. High-position slewing bearing; 19. Cylindrical personnel protection basket; 20. Support column; 21. Support guide ball; 22. Swing seat; 23. Hinge shaft; 24. Long pin shaft; 25. L-shaped climbing foot pedal toolbox; 26. Multi-stage telescopic adjustment cylinder; 27. Welded lug; 28. Swing lug; 29. ​​Remote support cylinder; 30. Remote support seat. Detailed Implementation

[0026] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore merely examples and should not be used to limit the scope of protection of the present invention. The specific structure of the present invention is as follows: Figures 1-2 As shown in the image. Example

[0027] The tracked aerial work platform includes a chassis assembly 1 with an internal power unit, a hydraulic station 2 mounted on the chassis assembly 1, a track assembly 3 mounted on the chassis assembly 1, a low-position slewing bearing 4 fixedly mounted at the top center of the chassis assembly 1, a bottom base 5 fixedly mounted on the top of the rotating part of the low-position slewing bearing 4, a support frame 6 mounted on the top of the bottom base 5, a scissor lift body 7 mounted on the top of the support frame 6, and a load-bearing work assembly mounted on the top of the scissor lift body 7. The load-bearing work assembly is used to carry people and goods and allows workers to perform aerial work inside it. A leveling support mechanism is fixedly mounted on the side plate seats 8 at both ends of the main frame 9 of the chassis assembly 1. Each leveling support mechanism works with the track assembly 3 to level the load-bearing work assembly when the ground is uneven. When in motion, the tracked aerial work platform vehicle uses the scissor lift body 7 to control the entire structure in a retracted state. The overall movement can be remotely controlled as needed. During movement, the track assembly 3 allows for smooth travel or hill climbing in complex road conditions, offering better flexibility and off-road performance. Once it reaches the designated maintenance or work site, the track assembly 3 is first positioned. If the level indicator on the chassis assembly 1 detects unevenness, the four track assemblies 3 can be extended and leveled. If necessary, one end or side of the entire track assembly can be raised off the ground to a certain extent, and the four leveling support mechanisms provide stable support for the entire structure.

[0028] In any of the above embodiments, preferably, the leveling support mechanism includes a ground support cylinder 10 fixedly installed on a side plate seat 8 at a corresponding position on the main frame 9. The top of the ground support cylinder 10 is movably hinged to a fixed support main shaft 12 on the side plate seat 8 via a fixed lug 11. A ground support foot 13 is hinged to the bottom of the piston rod of the ground support cylinder 10, and the ground support foot 13 rests against the ground in the working state. When the leveling support mechanism is working, it mainly relies on the extension and retraction of the ground support cylinder 10 to control the ground support foot 13 at its bottom to support the ground. When the ground support cylinder 10 is in an inclined support state, the various inclined support members on both sides can ensure its stability and firmness in the inclined support state.

[0029] In any of the above solutions, it is preferred that an inclined support member is symmetrically provided on each of the side plate seats 8 on both sides of the ground support cylinder 10, and the inclined support member cooperates to support and position the cylinder body of the ground support cylinder 10 in the inclined state.

[0030] The inclined support includes a diagonal brace positioning lug 14 fixedly mounted on the side plate seat 8. A side support auxiliary cylinder 15 is hinged to the bottom of the diagonal brace positioning lug 14, and the piston rod of the side support auxiliary cylinder 15 is hinged to the cylinder side wall of the side support auxiliary cylinder 15. The side support auxiliary cylinders 15 on each inclined support can provide lateral support to the ground support cylinder 10 when it is tilted due to uneven ground, ensuring the stability and reliability of the ground support cylinder 10 during operation.

[0031] In any of the above embodiments, preferably, the load-bearing operation component includes a limiting and protective cylinder 16 fixedly installed on the top of the scissor lift body 7. An extension seat 17 is fixedly welded to both sides of the top of the limiting and protective cylinder 16. A high-position slewing bearing 18 is fixedly installed at the bottom of the mounting cavity 17 of the limiting and protective cylinder 16. A cylindrical personnel basket 19 is fixedly installed on the top of the rotating part of the high-position slewing bearing 18. The cylindrical personnel basket 19 is used for carrying personnel and goods. A lifting extension mechanism is installed on the upper left and right sides of the cylindrical personnel basket 19. Each lifting extension mechanism is used to realize platform raising operations or side-connection operations. By using a low-position slewing bearing 4 in conjunction with a high-position slewing bearing 18, the rotation direction can be better controlled and quickly positioned when the object rotates, reducing the rotation adjustment time, improving work repositioning time, and increasing work efficiency.

[0032] In any of the above embodiments, it is preferred that a plurality of support columns 20 are fixedly installed at even intervals along the circumference of the bottom of the cylindrical manned protective basket 19. A support guide ball 21 is respectively engaged in a groove at the bottom of each support column 20, and each support guide ball 21 is supported on the top of the fixed part of the high-position slewing bearing 18. During the rotation of the entire cylindrical manned protective basket 19, the bottom support and guidance of each cylindrical manned protective basket 19 ensures stability and effective support during rotation. Example

[0033] The tracked aerial work platform includes a chassis assembly 1 with an internal power unit, a hydraulic station 2 mounted on the chassis assembly 1, a track assembly 3 mounted on the chassis assembly 1, a low-position slewing bearing 4 fixedly mounted at the top center of the chassis assembly 1, a bottom base 5 fixedly mounted on the top of the rotating part of the low-position slewing bearing 4, a support frame 6 mounted on the top of the bottom base 5, a scissor lift body 7 mounted on the top of the support frame 6, and a load-bearing work assembly mounted on the top of the scissor lift body 7. The load-bearing work assembly is used to carry people and goods and allows workers to perform aerial work inside it. A leveling support mechanism is fixedly mounted on the side plate seats 8 at both ends of the main frame 9 of the chassis assembly 1. Each leveling support mechanism works with the track assembly 3 to level the load-bearing work assembly when the ground is uneven.

[0034] When in motion, the tracked aerial work platform vehicle uses the scissor lift body 7 to control the entire structure in a retracted state. The overall movement can be remotely controlled as needed. During movement, the track assembly 3 allows for smooth travel or hill climbing in complex road conditions, offering better flexibility and off-road performance. Once it reaches the designated maintenance or work site, the track assembly 3 is first positioned. If the level indicator on the chassis assembly 1 detects unevenness, the four track assemblies 3 can be extended and leveled. If necessary, one end or side of the entire track assembly can be raised off the ground to a certain extent, and the four leveling support mechanisms provide stable support for the entire structure.

[0035] In any of the above embodiments, it is preferred that the leveling support mechanism includes a ground support cylinder 10 fixedly installed on the side plate seat 8 at the corresponding position of the main frame 9. The top of the ground support cylinder 10 is movably hinged to the fixed support main shaft 12 on the side plate seat 8 through a fixed lug 11. A ground support foot 13 is hinged to the bottom of the piston rod of the ground support cylinder 10. The ground support foot 13 abuts against the ground in the working state.

[0036] When the leveling support mechanism is working, it mainly relies on the extension and retraction of the ground support cylinder 10 to control the ground support foot 13 at its bottom to support the ground. When the ground support cylinder 10 is in the inclined support state, the various inclined support members on both sides can ensure its stability and firmness in the inclined support state.

[0037] In any of the above solutions, it is preferred that an inclined support member is symmetrically provided on each of the side plate seats 8 on both sides of the ground support cylinder 10, and the inclined support member cooperates to support and position the cylinder body of the ground support cylinder 10 in the inclined state.

[0038] The inclined support includes a diagonal brace positioning lug 14 fixedly installed on the side plate seat 8. A side support auxiliary cylinder 15 is hinged to the bottom of the diagonal brace positioning lug 14, and the piston rod of the side support auxiliary cylinder 15 is hinged to the cylinder side wall of the side support auxiliary cylinder 15.

[0039] The side support cylinders 15 on each inclined support member can provide lateral support to the ground support cylinder 10 when it is tilted due to uneven ground, thus ensuring the stability and reliability of the ground support cylinder 10 during operation.

[0040] In any of the above embodiments, preferably, the load-bearing operation component includes a limiting protective cylinder 16 fixedly installed on the top of the scissor lift body 7, an extension seat 17 fixedly welded on both sides of the top of the limiting protective cylinder 16, a high-position slewing bearing 18 fixedly installed at the bottom of the mounting cavity 17 of the limiting protective cylinder 16, a cylindrical personnel basket 19 fixedly installed on the top of the rotating part of the high-position slewing bearing 18, the cylindrical personnel basket 19 being used for carrying people and goods, and a lifting extension mechanism being installed on the upper left and right sides of the cylindrical personnel basket 19, each of the lifting extension mechanisms being used to realize platform raising operation or side connection operation.

[0041] By using a low-position slewing bearing 4 in conjunction with a high-position slewing bearing 18, the rotation direction can be better controlled and quickly positioned when the object is rotating, reducing the rotation adjustment time, improving the work changeover time, and increasing work efficiency.

[0042] In any of the above embodiments, it is preferred that a plurality of support columns 20 are fixedly installed at even intervals along the circumference of the bottom of the cylindrical manned protective basket 19, and a support guide ball 21 is respectively engaged in the groove at the bottom of each support column 20, and each support guide ball 21 is supported on the top of the fixed part of the high-position slewing bearing 18.

[0043] During the rotation of the entire cylindrical manned protective basket 19, the bottom support and guide of each cylindrical manned protective basket 19 can ensure the stability and effectiveness of the support during rotation.

[0044] In any of the above embodiments, it is preferred that the lifting extension mechanism includes a swing seat 22 disposed at the corresponding side wall opening of the cylindrical manned protective basket 19. The bottom ends of the swing seat 22 are respectively hinged to the front and rear side walls of the cylindrical manned protective basket 19 at corresponding positions via hinge shafts 23. The upper part of the swing seat 22 is movably inserted into the pin hole at the corresponding side wall position via a quick-pluggable long pin shaft 24. A swing support assembly is installed on the top of the extension seat 17 below the outer side of the swing seat 22. The swing support assembly is used to adjust the tilt angle of the swing seat 22 and support its outer bottom in a horizontal state.

[0045] In any of the above embodiments, it is preferred that the swing support assembly includes an inclined multi-stage telescopic adjustment cylinder 26. The bottom of the cylinder of the multi-stage telescopic adjustment cylinder 26 is hinged to a welded lug 27 fixed to the top of the extension seat 17, and the bottom of the piston rod is movably hinged to a swing lug 28 welded and fixed to the middle outer wall of the swing seat 22. A distal support cylinder 29 is fixedly installed on the top of the extension seat 17 on the outside of the swing seat 22. A distal support seat 30 is fixedly installed on the top of the piston rod of the distal support cylinder 29. The top of the distal support seat 30 abuts against the bottom of the swing seat 22 when it is adjusted to a horizontal state.

[0046] The lifting and extension mechanism serves three purposes: First, when repairing fault points on the aerial platform, this aerial work platform can be used to raise and lower workers to a designated position. Considering the presence of an extended guardrail support structure at the bottom under special circumstances, it is not possible to get too close to the bottom. Traditional work platforms do not have a horizontal extension function, resulting in a large gap between workers and the platform when workers ascend from the cylindrical personnel basket 19, leading to high operational risks. The cylindrical personnel basket 19 can adjust the vertical swing seat 22 to a horizontal state and serve as a connecting ladder under its function. Second, under normal conditions, the vertically positioned swing seat 22 primarily serves as lateral protection for workers inside the cylindrical personnel basket 19. Third, when the swing seat 22 is in a horizontal state, even if its outer end overlaps with the operating platform, it can also be used to raise the operating platform.

[0047] When adjusting the swing seat 22, the tilt angle of the swing seat 22 is adjusted by the extension and retraction of the corresponding multi-stage telescopic adjustment cylinder 26. When the swing seat 22 is adjusted to a horizontal state, it can be supported by the remote support cylinder 29. At the same time, considering safety, the outer end of the swing seat 22 can be lifted slightly higher than the inner end, so that it can be guaranteed to fall to the lower cylindrical manned protective basket 19 in time after a failure.

[0048] In any of the above embodiments, it is preferred that an L-shaped climbing foot pedal tool box 25 is fixedly installed on the left and right sides of the bottom of the bearing cavity of the cylindrical manned protective basket 19, and the L-shaped climbing foot pedal tool box 25 is hollow inside and has an open inner end face.

[0049] The L-shaped climbing foot pedal toolbox 25 set here has two main functions: first, it is used as a foot pedal; second, it is used as a storage cavity for storing operating tools.

[0050] Specific working principle:

[0051] When the tracked aerial work platform is in motion, the scissor lift body 7 controls the entire structure to be in a retracted state. The overall movement can be remotely controlled as needed. During the movement, the track components 3 can be used to achieve smooth movement or climbing operations in some complex road conditions, with better flexibility and off-road performance.

[0052] Once the ground below the designated maintenance or work site is reached, the track assembly 3 is first controlled to move into position. When the level on the chassis assembly 1 detects unevenness, the four track assemblies 3 can be extended and leveled. If necessary, one end or side of the entire track assembly can be raised to lift it off the ground to a certain extent. The stability of the entire structure can be achieved by relying on the support of the four leveling support mechanisms.

[0053] During the rotation of the entire cylindrical manned protective basket 19, the bottom support and guide of each cylindrical manned protective basket 19 can ensure the stability and effectiveness of the support during rotation.

[0054] The aerial work platform vehicle of this invention adopts a tracked structure at its bottom, allowing for stable movement under load conditions and strong overall operational stability, as well as a certain climbing ability. This tracked aerial work platform vehicle achieves stable bottom support during operation. Simultaneously, the cooperation of four leveling support mechanisms on both sides of the tracks can handle uneven terrain in the field. The control of the lifting, tilting, and leveling angle of each leveling support mechanism allows for better stable leveling of the chassis assembly 1 and its top structure, thus ensuring stable leveling support under uneven road conditions and guaranteeing a flat state during aerial operations. The top of the chassis assembly 1 and the load-bearing components... The bottom is equipped with slewing bearings. The combination of low and high slewing bearings can achieve a faster rotation response, ensuring smoothness and speed during overall relocation. In addition, the rotation method allows for easy control of the carried operators to perform work at multiple locations around the site as needed during operation. The lifting extension mechanism is also set on the left and right sides of the cylindrical personnel basket 19. Its main purpose is to provide a transition connection when it is necessary to connect to the adjacent work platform, allowing operators to move up to the high-altitude operating tower where maintenance and construction are needed for on-site work. In addition, it also increases the overall lifting range.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. For those skilled in the art, any alternative improvements or transformations made to the implementation of the present invention fall within the protection scope of the present invention.

[0056] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. Aerial platform truck comprising a chassis assembly having a power plant disposed therein, a hydraulic power unit disposed on the chassis assembly, characterized in that: A track assembly is mounted on the chassis assembly, a low-position slewing bearing is fixedly mounted on the top center of the chassis assembly, a bottom base is fixedly mounted on the top of the rotating part of the low-position slewing bearing, a support frame is mounted on the top of the bottom base, a scissor lift body is mounted on the top of the support frame, a load-bearing work assembly is mounted on the top of the scissor lift body, the load-bearing work assembly is used for carrying people and objects and completing high-altitude work inside by workers, and a leveling support mechanism is fixedly mounted on the side plate seat at each end of the main frame of the chassis assembly, and each leveling support mechanism cooperates with the track assembly to realize leveling of the load-bearing work assembly on uneven ground. The load-bearing work assembly comprises a limiting protection cylinder fixedly mounted on the top of the scissor lift body, an extension seat is fixedly and welded on each side of the top of the limiting protection cylinder, a high-position slewing bearing is fixed on the bottom of the mounting cavity of the limiting protection cylinder, a cylindrical manned protective basket is fixedly mounted on the top of the rotating part of the high-position slewing bearing, and a lifting extension mechanism is mounted on the upper left and right sides of the cylindrical manned protective basket, and each lifting extension mechanism is used for realizing platform heightening work or side lapping work. The lifting extension mechanism comprises a swing seat arranged at a corresponding side wall opening of the cylindrical manned protective basket, the bottom of the swing seat is movably hinged to the front and rear side walls of the cylindrical manned protective basket at corresponding positions through hinge shafts, and the upper part of the swing seat is movably inserted into a pin hole at a corresponding side wall position through a long pin shaft, a swing support assembly is mounted on the top of the extension seat outside and below the swing seat, and the swing support assembly is used for adjusting the inclination angle of the swing seat and supporting the outer end bottom of the swing seat in a horizontal state. When maintenance of a fault point on a high-altitude platform is needed, the aerial work vehicle is used to lift workers to a set position, the cylindrical manned protective basket is adjusted from a vertical state to a horizontal state under the action of the corresponding cylindrical manned protective basket and is used as a connecting ladder; in a normal state, the swing seat arranged vertically is used for protecting workers in the cylindrical manned protective basket; when the swing seat is in a horizontal state, the outer end part of the swing seat laps the operation platform and can also be used as a heightened operation platform; When the swing seat is adjusted, the inclination angle of the swing seat is adjusted by extension of the corresponding multi-stage telescopic adjusting cylinder, when the swing seat is adjusted to a horizontal state, the outer end of the swing seat is slightly higher than the inner end under the support of the distal end support stand cylinder, so that the swing seat can drop to the low-position cylindrical manned protective basket in time in case of failure.

2. The caterpillar aerial work platform according to claim 1, characterized in that: The leveling support mechanism comprises a ground support cylinder fixedly mounted on the side plate seat at a corresponding position of the main frame, the top of the ground support cylinder is movably hinged to a fixed support main shaft on the side plate seat through a fixed lug seat, and a ground support foot seat is hinged to the bottom of the piston rod of the ground support cylinder, and the ground support foot seat abuts against the ground in a working state.

3. The caterpillar aerial work platform according to claim 2, characterized in that: The side plate seat on both sides of the ground support cylinder is respectively provided with an inclined support piece, which cooperates to support and position the cylinder body of the ground support cylinder in the inclined state. The inclined support piece comprises a diagonal brace positioning ear seat fixedly installed on the side plate seat, and a side support auxiliary cylinder is hingedly connected to the bottom of the diagonal brace positioning ear seat, with the piston rod of the side support auxiliary cylinder being hingedly connected to the cylinder barrel side wall of the side support auxiliary cylinder.

4. The caterpillar aerial work platform according to claim 3, characterized in that: A plurality of support columns are uniformly and fixedly installed at the bottom of the cylindrical manned basket along the circumference thereof, and a support guide ball is respectively clamped in the groove at the bottom of each support column, with each support guide ball being supported on the top of the fixed portion of the high-position slewing bearing.

5. The caterpillar aerial work platform according to claim 4, characterized in that: The swing support assembly comprises a multi-stage telescopic adjusting cylinder arranged obliquely, the cylinder barrel of the multi-stage telescopic adjusting cylinder is hingedly connected to the welded ear seat fixedly connected to the top of the extension seat, the bottom of the piston rod is hingedly connected to the swing ear seat fixedly welded to the outer wall of the middle portion of the swing seat, a distal end support column is fixedly installed on the top of the extension seat on the outer side of the swing seat, a distal end support seat is fixedly installed on the top of the piston rod of the distal end support column, and the top of the distal end support seat abuts against the bottom of the swing seat adjusted to the horizontal state.

6. The caterpillar aerial work platform according to claim 5, characterized in that: An L-shaped climbing footrest tool box is fixedly installed on the left and right sides of the bottom of the load-bearing cavity of the cylindrical manned basket, and the L-shaped climbing footrest tool box is hollow and open at the inner end face.

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