Movable hydraulic lifting tower

Abstract

The invention discloses a movable hydraulic lifting tower. The front end of the trailer frame is provided with a traction hitching device and height-adjustable supporting legs, and the L-shaped double-arm type inner frame is fixed to the inner side, close to a front wheel, of the trailer frame. The side frame is installed on the outer wall of one side of the L-shaped double-arm type inner frame in a hinged mode, the multi-tower-section chain wheel lifting assembly is installed on the outer wall of the side, away from the L-shaped double-arm type inner frame, of the side frame, and a steel structure working table is installed at the driving position of the uppermost end of the multi-tower-section chain wheel lifting assembly. The hydraulic folding assembly enables the side frame and the multi-tower-section chain wheel lifting assembly to be gradually erected from a lying state and to be in a vertical state, then the side frame is locked through the hydraulic angle locking assembly, and a worker enters the steel structure working table; a ground worker lifts the steel structure working table to the working position through the control panel and the multi-tower-section chain wheel lifting assembly according to the working height, and the requirements for the low folding specification and the high lifting stroke are met.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, specifically a mobile hydraulic lifting tower. Background Technology

[0002] The outdoor temporary mobile hydraulic scissor lift is an aerial work platform designed specifically for outdoor environments with no fixed access facilities and variable work locations. It can precisely deliver personnel and materials to the required height, greatly improving the efficiency and safety of tasks such as building maintenance, equipment installation, tree trimming, emergency repairs, and large-scale event setup. The device consists of a chassis, hydraulic system, scissor structure, platform, and control system. The chassis is made of steel, ensuring good load-bearing capacity and stability, and is equipped with wheels for easy movement. The hydraulic system is its core, containing a hydraulic pump and cylinders, which achieve the lifting function through the delivery of hydraulic oil. The scissor structure, composed of multiple intersecting steel members, is responsible for the lifting movement, while the platform provides a safe working space for operators. During use, by activating the hydraulic system, the operator can control the lifting and quickly raise the load to the required height to complete the subsequent work. After the work is completed, the operator slowly releases the hydraulic oil through the control system, allowing the device to safely descend. As disclosed in the patent announcement CN220364342U, a mobile lifting device includes a base. Fixed rods are symmetrically fixedly connected to the top of the base. Movable rods are slidably connected to one side of each fixed rod. Multiple connecting rods are rotatably connected to the top of the movable rods and fixed rods. A lifting platform is connected above the connecting rods. A mounting frame is symmetrically fixedly connected to the upper end of the lifting platform. A winding reel is rotatably connected inside each mounting frame. Steel cables are wound around the outside of the winding reels. A carrying plate is connected below the steel cables. The carrying plate allows workers located below the lifting platform to easily transport materials to the top of the lifting platform, thus facilitating use by workers above the lifting platform. Simultaneously, when gears mesh, the motor drives one side of the carrying platform to rise, causing the other side's carrying platform to descend, thereby allowing the carrying platform on both sides to move. The platform moves up and down, thereby improving the material conveying efficiency. It can be seen that the above technology integrates a hydraulic lifter and a steel cable lifting structure. The lifting principle of the scissor mechanism is essentially a geometric amplification of the angle and arm length. Its maximum stroke is limited by the length of the single-stage scissor arm, the number of folding layers, and the specifications of the hydraulic cylinder. In order to obtain a greater working height, either the length of the single-stage arm must be increased, which will directly lead to a significant increase in the folded height and planar dimensions of the equipment after it is fully retracted. In addition, the steel cable lifting structure requires a certain vertical space for arrangement, that is, it is necessary to arrange pulley blocks and reserve space for the movement of steel cables. This results in the initial height of the equipment already having a certain height. In other words, the equipment occupies a certain height even before it is raised. In a low-space environment, it may be impossible for the equipment to smoothly enter the working area through the entrance porch. Summary of the Invention

[0003] The purpose of this invention is to provide a mobile hydraulic lifting tower. The trailer frame is attached to the rear of the towing vehicle. After the equipment enters the work area, the hydraulic folding assembly is activated via the control panel. The hydraulic folding assembly causes the side frame and the multi-tower section sprocket lifting assembly to gradually stand up from a lying position and into a vertical position. Then, the hydraulic locking assembly locks the side frame. The worker enters the steel structure work platform. The ground worker raises the steel structure work platform according to the working height using the control panel and the multi-tower section sprocket lifting assembly until it reaches the working position, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a mobile hydraulic lifting tower, comprising a trailer frame with a traction hook-up device and height-adjustable support legs at the front end, an L-shaped double-arm inner frame fixed on the inner side of the trailer frame near the front wheel, a side frame hinged to one outer wall of the L-shaped double-arm inner frame, and a multi-tower section sprocket lifting assembly installed on the outer wall of the side frame away from the L-shaped double-arm inner frame. A steel structure work platform is installed at the uppermost drive end of the multi-tower section sprocket lifting assembly. The interior of the L-shaped double-arm inner frame is provided with a hydraulic folding assembly for driving the side frame to rotate. Hydraulic locking assemblies for keeping the side frame in an upright state are installed on both the left and right inner walls of the L-shaped double-arm inner frame. A control panel is installed on the outer wall of the L-shaped double-arm inner frame near the front end of the trailer frame. The output end of the control panel is electrically connected to the input ends of the hydraulic folding assembly, the multi-tower section sprocket lifting assembly, and the hydraulic locking assembly, respectively.

[0005] Preferably, the hydraulic folding assembly includes two main hydraulic cylinders, two support shafts, and a U-shaped end. The U-shaped end is hinged to the cylinder body end and piston rod end of the main hydraulic cylinder. The cylinder body end of the main hydraulic cylinder is connected to one side outer wall of the L-shaped double-arm inner frame through the U-shaped end. The piston rod end of the main hydraulic cylinder is connected to one side outer wall of the side frame through the U-shaped end. A notch is provided inside the L-shaped double-arm inner frame below the piston rod of the main hydraulic cylinder, and the multi-tower sprocket lifting assembly is fixed in the notch.

[0006] Preferably, two inclined protrusions are integrally formed on the outer wall of the side frame near the notch, and both inclined protrusions are fitted with the support shaft.

[0007] Preferably, a main crossbeam arm parallel to the length direction of the trailer frame is bolted to the outer wall of the L-shaped double-arm inner frame above the main hydraulic cylinder, and a secondary crossbeam arm is bolted to the outer wall of the side frame above the two inclined convex plates. The end of the secondary crossbeam arm is used to contact the end of the main crossbeam arm when the side frame is in an upright state.

[0008] Preferably, the hydraulic locking assembly includes an H-shaped hollow cylinder, an auxiliary hydraulic cylinder, and a positioning pin. The H-shaped hollow cylinder is fixedly installed on one inner wall of the L-shaped double-arm inner frame, the auxiliary hydraulic cylinder is fixed on one outer wall of the H-shaped hollow cylinder, and the positioning pin is vertically inside the H-shaped hollow cylinder along the axial direction. One end of the positioning pin is fixedly connected to the piston rod end of the auxiliary hydraulic cylinder. A positioning hole is provided on one side of the inclined convex plate. The positioning hole is concentric with the H-shaped hollow cylinder when the side frame is in an upright state.

[0009] Preferably, a climbing ladder is installed on one outer wall of the steel structure work platform.

[0010] Preferably, the multi-tower section sprocket lifting assembly includes a primary tower section plate bolted to the outer wall of the side frame near the rear end of the trailer frame, a secondary tower section plate slidably installed inside the primary tower section plate along the length direction, and a tertiary tower section plate slidably installed inside the secondary tower section plate along the length direction. A sprocket lifting mechanism one and a sprocket lifting mechanism two are respectively installed on the inner wall of one side of the primary tower section plate and the secondary tower section plate. The sprocket lifting mechanism one and the sprocket lifting mechanism two drive the secondary tower section plate and the tertiary tower section plate to slide, respectively. The steel structure work platform is fixed to the upper end of the tertiary tower section plate.

[0011] Preferably, the first and second sprocket lifting mechanisms have the same structure, and both are electrically connected to the output end of the control panel. The second sprocket lifting mechanism includes two sprocket shafts rotatably mounted on the inner wall of one side of the secondary tower section plate, a transmission chain fitted between the two sprocket shafts, and a chain plate fixed to one end of the transmission chain surface. A bolt assembly for rigid connection is installed between the chain plate and the tertiary tower section plate. The second sprocket lifting mechanism also includes a reduction motor installed at the upper position of the outer wall of one side of the secondary tower section plate. The output shaft of the reduction motor is fixed to one end of one of the sprocket shafts through a coupling.

[0012] Preferably, sliding guides are installed between the lower end of the secondary tower section plate and the primary tower section plate, and between the lower end of the tertiary tower section plate and the secondary tower section plate.

[0013] Preferably, the sliding guide between the first-stage tower section plate and the second-stage tower section plate includes a track, a longitudinal beam, and an end plate. The track is fixed along the length direction on the left and right inner walls of the first-stage tower section plate, and the end plate is fixed on the left and right inner walls near the lower end of the second-stage tower section plate. The longitudinal beam is fixed between the two end plates. Two No. 2 pulleys that are in contact with the track are rotatably installed on one side of the outer wall of the end plate. A No. 1 pulley is rotatably installed at both ends of the longitudinal beam. The No. 1 pulley is in contact with one side of the outer wall of the track. The end plate has a through groove for the No. 1 pulley to pass through.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The mobile hydraulic lifting tower is equipped with a structure that coordinates with each other, including a trailer frame, an L-shaped double-arm inner frame, a hydraulic folding assembly, a side frame, a multi-tower section sprocket lifting assembly, a steel structure work platform, a hydraulic locking assembly, and a control panel. The trailer frame is attached to the rear of the towing vehicle. After the equipment enters the work area, the hydraulic folding assembly is activated through the control panel. The hydraulic folding assembly causes the side frame and the multi-tower section sprocket lifting assembly to gradually stand up from a lying state and into a vertical position. Then, the hydraulic locking assembly locks the side frame. The operator enters the steel structure work platform. The ground operator raises the steel structure work platform according to the working height through the control panel and the multi-tower section sprocket lifting assembly until it reaches the working position, thereby meeting the requirements of low folding specifications and high lifting stroke. When transported, it lies completely flat on the trailer frame, with an overall height equivalent to a cargo box. It can easily pass through common height-restricted areas such as bridges, tunnels, and doorways, and can be easily moved long or short distances by standard towing vehicles. This solves the problem of the initial height limitation of large self-propelled aerial work platforms. In addition, the working height of traditional scissor lift platforms is positively correlated with their retracted height. However, this solution adopts a lying and upright form conversion, and its maximum stroke is only limited by the number of tower sections and material strength of the multi-tower chain sprocket lifting assembly. It can achieve a lifting height higher than that of traditional scissor lift platforms without increasing the transport height dimension. Secondly, the hydraulic folding assembly operated via the control panel can automatically and smoothly flip the hydraulic folding assembly and side frame from a horizontal position to a vertical position, improving on-site action response and work efficiency. When the side frame is upright, the hydraulic locking assembly rigidly locks it, so that the side frame, L-shaped double-arm inner frame and trailer frame together form a wide and stable support frame. This makes the equipment more resistant to lateral swaying and overturning when working at height and under heavy loads, providing a stable operating environment for workers at height. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 yes Figure 1 Sectional view at point AA; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ; Figure 6 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 4 ; Figure 7 This is a schematic diagram of the three-dimensional structure of the L-shaped double-arm inner frame of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the hydraulic folding assembly of the present invention; Figure 9 For the present invention Figure 9 Enlarged structural diagram at point A in the middle; Figure 10 yes Figure 1 A three-dimensional structural cross-sectional view of point AA; Figure 11 For the present invention Figure 10 Enlarged structural diagram at point B; Figure 12 This is a schematic diagram of the three-dimensional structure of the multi-tower sprocket lifting assembly of the present invention; Figure 13 For the present invention Figure 12 Enlarged structural diagram at point C.

[0016] In the diagram: 1. Trailer frame; 2. L-shaped double-arm inner frame; 201. Notch section; 202. Main crossbeam arm; 3. Hydraulic folding assembly; 31. Main hydraulic cylinder; 32. U-shaped end; 33. Secondary crossbeam arm; 34. Sloping convex plate; 35. Support shaft; 4. Side frame; 5. Multi-tower section sprocket lifting assembly; 51. First-stage tower section plate; 52. Second-stage tower section plate; 53. Third-stage tower section plate; 54. Sprocket lifting mechanism one; 55. Sprocket lifting mechanism two. 551. Gear motor; 552. Sprocket shaft; 553. Drive chain; 554. Chain plate; 555. Bolt assembly; 56. Sliding guide; 561. Track; 562. Longitudinal beam; 563. End plate; 564. No. 1 pulley; 565. No. 2 pulley; 566. Through slot; 6. Steel structure workbench; 7. Control panel; 8. Hydraulic locking assembly; 81. I-beam hollow cylinder; 82. Auxiliary hydraulic cylinder; 83. Positioning pin; 9. Climbing ladder. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] Example 1, by Figures 1 to 6The present invention includes a trailer frame 1 with a traction hook-up device and height-adjustable support legs at the front end; an L-shaped double-arm inner frame 2 fixed on the inner side of the trailer frame 1 near the front wheel; a side frame 4 hinged to one outer wall of the L-shaped double-arm inner frame 2; and a multi-tower sprocket lifting assembly 5 installed on the outer wall of the side frame 4 away from the L-shaped double-arm inner frame 2. A steel structure work platform 6 is installed at the uppermost drive end of the multi-tower sprocket lifting assembly 5. A climbing ladder 9 is installed on one outer wall of the steel structure work platform 6, and workers can enter the steel structure work platform 6 through the climbing ladder 9. The front end of the trailer frame 1 is equipped with a standardized towing and attaching device, such as a towing pin or ball joint connector and adjustable height support legs. During transportation, it acts as a low flatbed trailer, carrying all the folded components and being towed by a tractor, making it easy to move the equipment to different locations. The L-shaped double-arm inner frame 2 is equipped with a hydraulic folding assembly 3 for driving the side frame 4 to flip. The left and right inner walls of the L-shaped double-arm inner frame 2 are equipped with hydraulic locking assemblies 8 for keeping the side frame 4 in an upright position. A control panel 7 is installed on the outer wall of the L-shaped double-arm inner frame 2 near the front end of the trailer frame 1. The output end of the control panel 7 is electrically connected to the input end of the hydraulic folding assembly 3, the multi-tower link sprocket lifting assembly 5, and the hydraulic locking assembly 8, respectively. Another controller can be installed in the steel structure work platform 6 to meet the dual control requirements of the platform and the ground. At this time, the backup controller on the steel structure work platform 6 can also be used for lifting and stopping control by the operator.

[0019] Example 2, based on Example 1, is... Figure 7 , Figure 8 and Figure 9 The hydraulic folding assembly 3 includes two main hydraulic cylinders 31, two support shafts 35, and a U-shaped end 32. The U-shaped end 32 is hinged to the cylinder body end and piston rod end of the main hydraulic cylinder 31. The cylinder body end of the main hydraulic cylinder 31 is connected to one side outer wall of the L-shaped double-arm inner frame 2 through the U-shaped end 32. The piston rod end of the main hydraulic cylinder 31 is connected to one side outer wall of the side frame 4 through the U-shaped end 32. Both the cylinder body end and the piston rod end of the main hydraulic cylinder 31 are in a movable state with respect to the mounting surface through the U-shaped end 32. The L-shaped double-arm inner frame 2 below the piston rod of the main hydraulic cylinder 31 has a notch 201 inside, and the multi-tower sprocket lifting assembly 5 is fixed in the notch 201. Two inclined convex plates 34 are integrally formed on the outer wall of the side frame 4 near the notch 201. Both inclined convex plates 34 are fitted with the support shaft 35. When the hydraulic folding assembly 3 drives the side frame 4, the multi-tower sprocket lifting assembly 5, and the steel structure work platform 6 to flip and stand upright, the two main hydraulic cylinders 31 synchronously return and retract under the control of the control panel 7. Then, the main hydraulic cylinders 31 drive the inclined convex plates 34 and the side frame 4 to deflect upward around the support shaft 35 in the notch 201 until the side frame 4 and the multi-tower sprocket lifting assembly 5 are in an upright state, so that the equipment can be unfolded or folded in a short time, improving the flexibility of operation. A main crossbeam arm 202, parallel to the length direction of the trailer frame 1, is bolted to the outer wall of the L-shaped double-arm inner frame 2 above the main hydraulic cylinder 31. A secondary crossbeam arm 33 is bolted to the outer wall of the side frame 4 above the two inclined convex plates 34. The end of the secondary crossbeam arm 33 is used to contact the end of the main crossbeam arm 202 when the side frame 4 is in an upright state. When the side frame 4 is in an upright state, the secondary crossbeam arm 33 on the outer wall of the side frame 4 will keep in contact with the end of the main crossbeam arm 202 to ensure that the side frame 4 will not deform when subjected to huge alternating stress. The hydraulic locking assembly 8 includes an H-shaped hollow cylinder 81, an auxiliary hydraulic cylinder 82, and a positioning pin 83. The H-shaped hollow cylinder 81 is fixedly installed on one inner wall of the L-shaped double-arm inner frame 2. The auxiliary hydraulic cylinder 82 is fixed on one outer wall of the H-shaped hollow cylinder 81. The positioning pin 83 is vertically positioned inside the H-shaped hollow cylinder 81 along the axial direction, and one end of the positioning pin 83 is fixedly connected to the piston rod end of the auxiliary hydraulic cylinder 82. A positioning hole is provided on one side of the inclined convex plate 34. The positioning hole is concentric with the H-shaped hollow cylinder 81 when the side frame 4 is in an upright state. When the side frame 4 and the multi-tower sprocket lifting assembly 5 are driven and erected by the hydraulic folding assembly 3, the positioning hole on the inclined convex plate 34 will be concentric with the I-beam hollow cylinder 81. At this time, the operator opens the auxiliary hydraulic cylinder 82 through the control panel 7. The auxiliary hydraulic cylinder 82 drives the positioning pin 83 to move along the axis of the I-beam hollow cylinder 81 until the positioning pin 83 enters the positioning of the inclined convex plate 34, so that the inclined convex plate 34 and the side frame 4 are locked, eliminating the degree of freedom of movement of the hinge point, so as to prevent accidental tilting or collapse during operation.

[0020] Example 3, based on Example 2, by Figure 10 , Figure 11 , Figure 12 and Figure 13The multi-tower section sprocket lifting assembly 5 includes a primary tower section plate 51 bolted to the outer wall of the side frame 4 near the rear end of the trailer frame 1, a secondary tower section plate 52 slidably installed along the length direction inside the primary tower section plate 51, and a tertiary tower section plate 53 slidably installed along the length direction inside the secondary tower section plate 52. A sprocket lifting mechanism 1 54 and a sprocket lifting mechanism 2 55 are respectively installed on the inner wall of one side of the primary tower section plate 51 and the secondary tower section plate 52. The sprocket lifting mechanism 1 54 and the sprocket lifting mechanism 2 55 respectively drive the secondary tower section plate 52 and the tertiary tower section plate 53 to slide. A steel structure work platform 6 is fixed to the upper end of the tertiary tower section plate 53. The first-stage tower section plate 51, the second-stage tower section plate 52, and the third-stage tower section plate 53 form a nested and sliding structure. The first sprocket lifting mechanism 54 drives the second-stage tower section plate 52 to gradually slide out from the first-stage tower section plate 51, while the second sprocket lifting mechanism 55 drives the third-stage tower section plate 53 to gradually slide out from the second-stage tower section plate 52. By climbing section by section, the stacked sections are released. During transportation, all tower sections are completely compressed, and their height is only the height of one tower section, making them extremely compact. During operation, their stroke is almost the sum of the effective lengths of each tower section. In conjunction with the hydraulic stacking assembly 3, they can change shape and solve the contradiction between lifting height and transportation size. The sprocket lifting mechanism 1 (54) and sprocket lifting mechanism 2 (55) have the same structure, and both sprocket lifting mechanism 1 (54) and sprocket lifting mechanism 2 (55) are electrically connected to the output end of the control panel 7. Sprocket lifting mechanism 2 (55) includes two sprocket shafts 552 rotatably mounted on the inner wall of one side of the secondary tower section plate 52, a transmission chain 553 fitted between the two sprocket shafts 552, and a chain plate 554 fixedly connected to one end of the surface of the transmission chain 553. A bolt assembly 555 for rigid connection is installed between the chain plate 554 and the tertiary tower section plate 53. The second structure 55 also includes a geared motor 551 installed on the upper part of the outer wall of the second-stage tower section plate 52. The output shaft of the geared motor 551 is fixedly connected to one end of one of the sprocket shafts 552 through a coupling. Taking the second sprocket lifting mechanism 55 driving the third-stage tower section plate 53 to move out of the second-stage tower section plate 52 as an example, the geared motor 551 drives one of the sprocket shafts 552 to work under the control of the control panel 7. Then, the transmission chain 553 between the two sprocket shafts 552 drives the third-stage tower section plate 53 to move up and down through the bolt assembly 555 and the chain plate 554. Sliding guides 56 are installed between the lower end of the secondary tower section plate 52 and the primary tower section plate 51, and between the lower end of the tertiary tower section plate 53 and the secondary tower section plate 52. The sliding guides 56 between the primary tower section plate 51 and the secondary tower section plate 52 include a track 561, a longitudinal beam 562, and an end plate 563. The track 561 is fixed along the length direction on the left and right inner walls of the primary tower section plate 51. The end plate 563 is fixed on the left and right inner walls near the lower end of the secondary tower section plate 52. The longitudinal beam 562 is fixed between the two end plates 563. Two pulleys 565 are rotatably installed on one side of the outer wall of the end plate 563 and are in contact with the track 561. A pulley 564 is rotatably installed at both ends of the longitudinal beam 562. The pulley 564 is in contact with one side of the outer wall of the track 561. The end plate 563 has a through groove 566 for the pulley 564 to pass through. Taking the relative sliding between the secondary tower section plate 52 and the primary tower section plate 51 as an example, the longitudinal beam 562 at the lower end of the secondary tower section plate 52 maintains a sliding engagement with the track 561 through the first pulley 564 and the second pulley 565, which makes the sprocket lifting mechanism 54 more stable and smooth when pulling the secondary tower section plate 52, reducing the possibility of violent vibration or tilting.

[0021] In this embodiment, the side frame 4, L-shaped double-arm inner frame 2, multi-tower sprocket lifting assembly 5, and steel structure work platform 6 are first laid flat and locked onto the trailer frame 1 by the hydraulic locking assembly 8, presenting a low cargo platform form. After the equipment arrives at the work site and the towing vehicle is parked and the outriggers of the trailer frame 1 are stabilized, the ground operator starts the hydraulic folding assembly 3 through the control panel 7. The hydraulic folding assembly 3 begins to output power smoothly, which acts on the side frame 4, causing it to generate initial movement, thereby driving the multi-tower sprocket lifting assembly 5 installed on it. As a whole, it revolves around... The hinge point of the L-shaped double-arm inner frame 2 slowly rotates upward from its lying position. When the side frame 4, multi-tower section sprocket lifting assembly 5, and steel structure work platform 6 rotate to a completely vertical position, the hydraulic folding assembly 3 stops working. The operator triggers the hydraulic locking assembly 8, which rigidly and mechanically locks the side frame 4 to the L-shaped double-arm inner frame 2, completely eliminating any possible swaying or rotational tendency. This transforms the originally movable hinge structure into a stable, vertical high-altitude tower foundation. After the transformation is complete, the platform operator enters the steel structure work platform. 6. According to the work instructions, the ground operator sends a lifting command to the multi-tower section sprocket lifting assembly 5 via the control panel 7. The multi-tower section sprocket lifting assembly 5 drives the uppermost tower section to lift the steel structure work platform 6 first. After reaching one stroke, the adjacent tower sections below continue to lift, extending section by section. The platform operator needs to continuously observe the surrounding environment during the ascent. When the steel structure work platform 6 reaches the predetermined working height, the ground operator releases the lifting button, and the multi-tower section sprocket lifting assembly 5 stops moving, and the steel structure work platform 6 is safely suspended in the designated position. After the work task is completed, the operator... The control panel 7 causes the steel structure work platform 6 to slowly and uniformly descend under the drive of the multi-tower section sprocket lifting assembly 5. Subsequently, the tower sections also retract into the nest in an orderly manner. When the steel structure work platform 6 has completely descended to the transport position and is in contact with the transport position, the multi-tower section sprocket lifting assembly 5 stops completely. The platform operator leaves the steel structure work platform 6, and the ground operator operates the control panel 7 to release the rigid lock of the hydraulic locking angle assembly 8. Then, the hydraulic folding assembly 3 is started in reverse, driving the entire vertical structure to swing downward smoothly and in a controlled manner until it is completely lying on the trailer frame 1, and the equipment returns to the transport state.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mobile hydraulic lifting tower, characterized in that: The trailer includes a trailer frame (1) with a towing hook-up device at the front end and height-adjustable support legs; an L-shaped double-arm inner frame (2) fixed to the inner side of the trailer frame (1) near the front wheel; a side frame (4) hinged to one side of the outer wall of the L-shaped double-arm inner frame (2); and a multi-tower sprocket lifting assembly (5) mounted on the outer wall of the side frame (4) away from the L-shaped double-arm inner frame (2). A steel structure work platform (6) is installed at the uppermost drive point of the multi-tower sprocket lifting assembly (5). (2) is equipped with a hydraulic folding assembly (3) for driving the side frame (4) to flip. The left and right inner walls of the L-shaped double-arm inner frame (2) are equipped with hydraulic locking assemblies (8) for keeping the side frame (4) in an upright position. The outer wall of the L-shaped double-arm inner frame (2) near the front end of the trailer frame (1) is equipped with a control panel (7). The output end of the control panel (7) is electrically connected to the input end of the hydraulic folding assembly (3), the multi-tower sprocket lifting assembly (5), and the hydraulic locking assembly (8).

2. A mobile hydraulic lifting tower according to claim 1, characterized in that: The hydraulic folding assembly (3) includes two main hydraulic cylinders (31), two support shafts (35), and a U-shaped end (32). The U-shaped end (32) is hinged to the cylinder end and piston rod end of the main hydraulic cylinder (31). The cylinder end of the main hydraulic cylinder (31) is connected to the outer wall of one side of the L-shaped double-arm inner frame (2) through the U-shaped end (32). The piston rod end of the main hydraulic cylinder (31) is connected to the outer wall of one side of the side frame (4) through the U-shaped end (32). The L-shaped double-arm inner frame (2) below the piston rod of the main hydraulic cylinder (31) has a notch (201) inside. The multi-tower sprocket lifting assembly (5) is fixed in the notch (201).

3. A mobile hydraulic lifting tower according to claim 2, characterized in that: Two inclined convex plates (34) are integrally formed on the outer wall of the side frame (4) near the notch (201), and both inclined convex plates (34) are fitted with the support shaft (35).

4. A mobile hydraulic lifting tower according to claim 2, characterized in that: The main crossbeam arm (202) is bolted to the outer wall of the L-shaped double-arm inner frame (2) above the main hydraulic cylinder (31), and is parallel to the length direction of the trailer frame (1). The secondary crossbeam arm (33) is bolted to the outer wall of the side frame (4) above the two inclined convex plates (34). The end of the secondary crossbeam arm (33) is used to contact the end of the main crossbeam arm (202) when the side frame (4) is in an upright state.

5. A mobile hydraulic lifting tower according to claim 3, characterized in that: The hydraulic locking assembly (8) includes an I-shaped hollow cylinder (81), an auxiliary hydraulic cylinder (82), and a positioning pin (83). The I-shaped hollow cylinder (81) is fixedly installed on one side of the inner wall of the L-shaped double-arm inner frame (2). The auxiliary hydraulic cylinder (82) is fixed on one side of the outer wall of the I-shaped hollow cylinder (81). The positioning pin (83) is vertically inside the I-shaped hollow cylinder (81) along the axial direction, and one end of the positioning pin (83) is fixedly connected to the piston rod end of the auxiliary hydraulic cylinder (82). A positioning hole is provided on one side of the inclined convex plate (34). The positioning hole is concentric with the I-shaped hollow cylinder (81) when the side frame (4) is in an upright state.

6. A mobile hydraulic lifting tower according to claim 1, characterized in that: A climbing ladder (9) is installed on one side of the outer wall of the steel structure work platform (6).

7. A mobile hydraulic lifting tower according to claim 1, characterized in that: The multi-tower section sprocket lifting assembly (5) includes a first-stage tower section plate (51) bolted to the outer wall of the side frame (4) near the tail end of the trailer frame (1), a second-stage tower section plate (52) slidably installed inside the first-stage tower section plate (51) along the length direction, and a third-stage tower section plate (53) slidably installed inside the second-stage tower section plate (52) along the length direction. A sprocket lifting mechanism one (54) and a sprocket lifting mechanism two (55) are respectively installed on the inner wall of one side of the first-stage tower section plate (51) and the second-stage tower section plate (52). The sprocket lifting mechanism one (54) and the sprocket lifting mechanism two (55) drive the second-stage tower section plate (52) and the third-stage tower section plate (53) to slide. The steel structure work platform (6) is fixed at the upper end of the third-stage tower section plate (53).

8. A mobile hydraulic lifting tower according to claim 7, characterized in that: The first sprocket lifting mechanism (54) and the second sprocket lifting mechanism (55) have the same structure, and both the first sprocket lifting mechanism (54) and the second sprocket lifting mechanism (55) are electrically connected to the output end of the control panel (7). The second sprocket lifting mechanism (55) includes two sprocket shafts (552) rotatably mounted on the inner wall of one side of the secondary tower section plate (52), a transmission chain (553) fitted between the two sprocket shafts (552), and a chain plate (554) fixedly connected to one end of the surface of the transmission chain (553). A bolt assembly (555) for rigid connection is installed between the chain plate (554) and the tertiary tower section plate (53). The second sprocket lifting mechanism (55) also includes a reduction motor (551) installed at the upper position on the outer wall of one side of the secondary tower section plate (52). The output shaft of the reduction motor (551) is fixedly connected to one end of one of the sprocket shafts (552) through a coupling.

9. A mobile hydraulic lifting tower according to claim 7, characterized in that: Sliding guides (56) are installed between the lower end of the secondary tower section plate (52) and the primary tower section plate (51), and between the lower end of the tertiary tower section plate (53) and the secondary tower section plate (52).

10. A mobile hydraulic lifting tower according to claim 9, characterized in that: The sliding guide (56) between the first-stage tower section plate (51) and the second-stage tower section plate (52) includes a track (561), a longitudinal beam (562), and an end plate (563). The track (561) is fixed along the length direction on the left and right inner walls of the first-stage tower section plate (51). The end plate (563) is fixed on the left and right inner walls at the lower end of the second-stage tower section plate (52). The longitudinal beam (562) is fixed between the two end plates (563). Two pulleys (565) are rotatably installed on one side of the outer wall of the end plate (563) and are in contact with the track (561). A pulley (564) is rotatably installed at both ends of the longitudinal beam (562). The pulley (564) is in contact with one side of the outer wall of the track (561). The end plate (563) has a through groove (566) for the pulley (564) to pass through.

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