A hoisting device for an excavator upper platform

Abstract

The application discloses a hoisting device for an upper platform of an excavator and belongs to the field of engineering machinery assembly. The device comprises a foldable I-beam assembly, the upper end of which is gathered to a lifting ring through a lifting wire rope to form a hoisting point, and the lower end is connected with a square lifting hook assembly and a circular lifting hook assembly through a suspension wire rope respectively; wherein the suspension wire rope has different lengths to form an asymmetric hanging structure, and each lifting hook assembly is provided with a length adjusting mechanism; the lower end of the square lifting hook assembly is detachably connected with a cross beam assembly to install a limiting part from the bottom of the rear part of the platform, so as to provide a lifting stress point for the rear part without a direct hoisting point; and the lower end of the circular lifting hook assembly is connected with an existing hoisting position of the front part of the platform through a lifting shaft assembly. The application can accurately control the gravity center of the asymmetric platform assembly by creating a rear hoisting point, an asymmetric hanging and a multi-point length fine adjustment, realizes horizontal lifting, and has the advantages of high safety, efficient operation, modularity and convenience in transfer and storage.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery assembly technology, specifically to a hoisting device for the upper platform of an excavator. Background Technology

[0002] In the field of construction machinery assembly, the excavator's upper platform assembly integrates key components such as the power system, hydraulic system, driver's cab, and engine cover. Its structure is massive and heavy, and it is typically asymmetrically laid out, making it difficult to accurately calculate and control its center of gravity. (Refer to...) Figure 1 During the final assembly process, the upper platform assembly must be lifted smoothly and precisely assembled with the chassis.

[0003] However, the hoisting of such platform assemblies generally presents the following challenges: First, the rear of the platform often lacks well-designed lifting points or lugs that can be directly used for hoisting, making it impossible to perform balanced hoisting directly; Second, due to the asymmetrical structure and uneven distribution of internal components, the center of gravity is not clearly defined, and blind hoisting is prone to tilting and swaying, posing a safety risk of collision and damage to parts, or even equipment overturning and personal injury, seriously affecting installation efficiency and assembly quality.

[0004] To address the aforementioned issues, several lifting device solutions have been disclosed in the prior art. For example, Chinese utility model patent CN202321969U discloses a special lifting device for excavator assembly platforms, which uses an I-beam as the main load-bearing structure. Four flexible slings converge at the top of the I-beam to a lifting ring, while four flexible slings with rigging screws in the middle connect the shackles and eye bolts at the bottom. This solution allows for adjustment of the length of the lower slings via the rigging screws to accommodate certain center-of-gravity shifts. However, the lifting force of this device must be transmitted through the platform's own lifting positions. If the platform lacks lifting points at the rear, it cannot provide an effective lifting force point, making safe lifting difficult. Furthermore, the I-beam is a fixed, integral structure with a non-foldable length, making transportation and storage inconvenient and limiting its flexibility in space-constrained assembly sites.

[0005] For example, Chinese utility model patent CN215626132U discloses a lifting device for an excavator upper assembly. Its main beam has an upper lifting chain, and near both ends of the main beam, there is an adjusting arm whose position can be adjusted along the axial direction of the main beam. Each adjusting arm is equipped with a lower lifting chain. By moving the adjusting arms, the suspension position of the lower lifting chain can be adjusted, thereby expanding the range of center of gravity adjustment and exhibiting strong versatility. However, this lifting device also relies on the lifting lugs or lifting points of the upper assembly itself for hoisting, failing to address the problem of no direct lifting points at the rear of the platform. Furthermore, its structure itself lacks modular folding functionality, making it difficult to achieve rapid, precise leveling and efficient transport for specific platform assemblies that are asymmetrical and lack rear lifting points.

[0006] In summary, existing lifting equipment technologies still suffer from shortcomings when dealing with asymmetrical heavy upper platforms that lack rear lifting points and are difficult to precisely control in terms of center of gravity. These shortcomings include the inability to cover the lifting points, difficulties in adjusting the center of gravity, and inconvenience in transporting and storing the tooling. Therefore, there is an urgent need for a specialized lifting solution that can create reliable lifting points for the rear of the platform without lifting points, precisely control the asymmetrical center of gravity, and facilitate the transport and storage of the tooling itself. Summary of the Invention

[0007] The purpose of this invention is to provide a modular and adjustable hoisting fixture to reduce the difficulty of transportation and storage, and to improve the convenience and adaptability of hoisting operations.

[0008] The technical solution of the present invention: a hoisting device for an excavator's upper platform, comprising, I-beam assembly with a foldable structure; Wire rope assembly, including an upper lifting wire rope and a lower suspension wire rope; The lower end of the upper lifting wire rope is connected to the I-beam assembly, and the upper end converges to a lifting ring to form a lifting point; The upper end of the lower suspension wire rope is connected to the I-beam assembly, and the lower end is independently connected to a square hook assembly and a round hook assembly. The suspension wire ropes used to suspend the square hook assembly and the round hook assembly have different lengths, forming an asymmetrical suspension structure. A crossbeam assembly, detachably connected to the lower end of the square hook assembly, is configured to be mounted from the rear of the platform assembly to its bottom and limited by fasteners, thereby providing a lifting force point for the rear of the platform where there is no direct lifting point; The lifting shaft assembly is detachably connected to the lower end of the circular hook assembly and is used to pass through and connect to an existing lifting position at the front end of the platform assembly.

[0009] Furthermore, the I-beam assembly includes a T-shaped crossbeam, with a T-shaped plate fixed to the vertical beam end of the T-shaped crossbeam. A left cantilever beam and a right cantilever beam are respectively hinged to the left and right ends of the T-shaped plate. The left and right cantilever beams can rotate relative to the T-shaped plate and can switch between a folded state that is retracted along the vertical beam direction and a hoisting state that is extended along the direction perpendicular to the vertical beam direction.

[0010] Furthermore, the four ends of the I-beam assembly are detachably connected to hanging plates by bolts. A square hole is provided in the middle of the hanging plate, and symmetrical rope mounting holes are provided at both ends of the square hole along the length of the hanging plate. The rope mounting holes are used to directly connect steel wire ropes or to connect steel wire ropes through shackles.

[0011] Furthermore, the wire rope of the wire rope assembly has connecting loops formed at both ends by circular knots to form an adjustable length connection structure.

[0012] Furthermore, the circular hook assembly includes a mounting plate and a column; the mounting plate is integrally formed from a square portion and a semi-circular portion, the square portion has an oblong hole, the vertical end of the square portion has a mounting hole perpendicular to the oblong hole, and the semi-circular portion has a circular hole; Two symmetrically arranged small cylinders are integrally formed on the side wall of the column. The column passes horizontally through the waist-shaped hole, and the two small cylinders are correspondingly inserted into the mounting hole to form a hook structure.

[0013] Furthermore, the square hook assembly has the same structure as the round hook assembly, the only difference being that the mounting plate of the square hook assembly is square in shape, and the round hole is a square hole.

[0014] Furthermore, the crossbeam assembly is a square tube structure, and its upper surface, which is used to contact the platform assembly, is covered with a rubber pad.

[0015] Furthermore, the hanging shaft assembly is a hollow circular tube, with one end being a detachable end that is limited by bolts, and the other end being a non-detachable end that is limited by a welded ring.

[0016] Furthermore, the hanging plate is fitted onto the end of the I-beam assembly through a square hole in its middle; the upper part of the hanging plate has a rope mounting hole for connecting the lifting wire rope, and the lower part has a rope mounting hole for connecting the suspension wire rope; the end of the suspension wire rope away from the hanging plate is hooked onto the column of the square hook assembly or the round hook assembly.

[0017] Furthermore, the square tube of the beam assembly passes through the square hole of the square hook assembly, and the hollow round tube of the shaft assembly passes through the round hole of the round hook assembly.

[0018] The beneficial effects of this invention are: 1. High safety: The crossbeam assembly provides a safe load-bearing point at the rear of the platform without lifting points, and the adjustable hook and asymmetrical wire rope assembly can accurately find and control the center of gravity of the asymmetrical platform, effectively preventing tilting and swaying during the lifting process, and greatly improving the safety of the lifting operation.

[0019] 2. Efficiency Improvement: This method and tooling simplify the hoisting preparation process, with clear operation steps, eliminating the tedious process of repeatedly trying to find the center of gravity, and significantly improving the assembly efficiency of the upper platform and chassis.

[0020] 3. Excellent versatility and adaptability: The tooling adopts a modular design, allowing for quick assembly and disassembly of each component. The collapsible design of the I-beam greatly facilitates the transportation and storage of the tooling itself, saving space. The adjustable hook length allows it to adapt to different lifting conditions and fine-tuning needs.

[0021] 4. Protective Equipment: The rubber pads on the crossbeam assembly and the reasonable stress design prevent damage to the paint and structure of the platform assembly during the hoisting process. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the platform assembly structure; Figure 2 This is a schematic diagram of the hoisting tooling and hoisting platform assembly structure. Figure 1 ; Figure 3 This is a schematic diagram of the hoisting tooling and hoisting platform assembly structure. Figure 2 ; Figure 4 This is a schematic diagram of the unfolded I-beam assembly; Figure 5 This is a schematic diagram of the folding of an I-beam assembly; Figure 6 A 3D diagram of a circular hook; Figure 7 A 3D diagram of a square hook; Figure 8 This is a three-dimensional schematic diagram of the crossbeam assembly; Figure 9 This is a three-dimensional schematic diagram of the lifting shaft assembly; Figure 10 Diagram showing the connection between the circular hook assembly and the suspended platform. Figure 1 ; Figure 11 Diagram showing the connection between the circular hook assembly and the suspended platform. Figure 2 ; Figure 12 Diagram showing the connection between the square hook assembly and the hanging plate. Figure 1 ; Figure 13 Diagram showing the connection between the square hook assembly and the hanging plate. Figure 2 ; Figure 14 This is a schematic diagram of the beam assembly hoisting process. Figure 15 Schematic diagram of hoisting tooling and hoisting platform assembly structure Figure 3 ; Reference numerals: 1. I-beam assembly; 2. Wire rope assembly; 3. Circular hook assembly; 4. Square hook assembly; 5. Crossbeam assembly; 6. Hanging shaft assembly; 7. Hanging plate; 11. T-shaped crossbeam; 12. T-shaped plate; 13. Right cantilever beam; 14. Left cantilever beam; 51. Rubber pad. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0025] This invention discloses a hoisting fixture and method for an excavator upper platform assembly. By installing an auxiliary crossbeam to the rear of the platform to create hoisting points, and utilizing an I-beam with a deployable cantilever, asymmetrical wire ropes, and a specialized hook assembly with adjustable length, the height of each hoisting point is fine-tuned before and during hoisting. This allows for quick and precise location of the center of gravity of the asymmetrical heavy-duty platform assembly, enabling it to be hoisted horizontally. The fixture of this invention features high modularity, good adjustability, and convenient transport and storage. This method and fixture effectively solve the problems of low hoisting safety and efficiency caused by the lack of hoisting points at the rear of the excavator upper platform and difficulty in controlling the center of gravity, demonstrating high practical and promotional value. A schematic diagram of the platform assembly hoisting is shown below. Figure 2 - Figure 15 As shown, the lifting tool mainly consists of six parts: I-beam assembly, wire rope assembly, round hook assembly, square hook assembly, crossbeam assembly, and lifting shaft assembly.

[0026] The tooling assembly and hoisting steps are as follows: 1. Assemble the I-beam assembly, with the left and right cantilever arms of the I-beam assembly in the extended state; 2. Assemble the square / round hook assembly; 3. Connect the square / round hook assembly to the I-beam assembly and secure it with bolts; 4. Connect the wire rope assembly to the upper shackle of the I-beam assembly's hanging plate; 5. Connect the crossbeam assembly to the square hook assembly and secure it with bolts; 6. Use an overhead crane to lift the assembled wire rope assembly, I-beam assembly, crossbeam assembly, and square / round hook assembly above the platform assembly. Slowly lower and adjust the position of the crossbeam assembly, install the crossbeam assembly from the rear of the platform assembly to the bottom of the platform assembly, and use bolts to limit its position. 7. Connect the circular hook assembly to the front lifting position of the platform assembly via the lifting shaft assembly; 8. After the hoisting equipment is installed, lift it slowly, and continuously adjust the position of the hook assembly, the I-beam assembly, and the crossbeam assembly, as well as the length of the hook assembly limit bolts, until the platform assembly is in a horizontal and balanced position after being lifted.

[0027] The left and right cantilever arms of the I-beam assembly adopt an asymmetrical structure that can be extended / retracted. The extended length is 3200mm, and the retracted length is only 1200mm, which greatly reduces the difficulty of transportation (the center of gravity position is easy to determine and easy to lift) and storage space. The installation positions of the hanging plates at both ends of the I-beam assembly are limited by bolts, which facilitates the disassembly and assembly of the hanging plates.

[0028] Based on the structural characteristics of the platform assembly, the rear wire rope assembly also adopts an asymmetrical structure, which is beneficial for controlling the center of gravity when hoisting the platform assembly and increasing hoisting safety.

[0029] The circular hook assembly is composed of multiple parts, facilitating disassembly, transportation, and storage. The overall length of the hook assembly is controlled by adjusting the top limit bolt. The shackle is easy to assemble and disassemble.

[0030] The square hook assembly is made up of multiple parts, making it easy to disassemble, transport, and store. The overall length of the hook assembly is controlled by adjusting the top limit bolt. The shackle is easy to assemble and disassemble.

[0031] The crossbeam assembly structure is designed based on the lifting platform's bottom structure, cleverly utilizing the platform's bottom structure to limit the crossbeam's position with bolts, facilitating disassembly, assembly, and adjustment while ensuring lifting safety. Rubber pads are laid on the contact surface between the crossbeam assembly and the lifting platform to prevent damage to the platform's contact points during lifting. The square hooks at both ends of the crossbeam assembly are bolted for easy disassembly and adjustment.

[0032] The lifting shaft assembly has a simple structure, adopts a hollow structure, and is lightweight; the detachable end of the lifting shaft assembly is limited by bolts, making it easy to disassemble and assemble, while the non-detachable end is limited by welded rings.

[0033] Example 1: Refer to Figures 2 to 13 A hoisting device for an excavator's upper platform is disclosed, mainly composed of an I-beam assembly 1, a wire rope assembly 2, a circular hook assembly 3, a square hook assembly 4, a crossbeam assembly 5, a lifting shaft assembly 6, and a lifting plate 7. This device aims to solve the technical problems of existing lifting tools when facing asymmetrical heavy upper platforms without a direct lifting point at the rear, such as the inability to provide a rear load-bearing point, difficulty in accurately controlling the center of gravity, and inconvenience in the transfer and storage of tooling.

[0034] The I-beam assembly 1, serving as the main load-bearing component, has a foldable structure. (Refer to...) Figure 4 and Figure 5 The I-beam assembly 1 includes a T-shaped crossbeam 11, with a T-shaped plate 12 fixed to the vertical end of the T-shaped crossbeam 11. A left cantilever beam 14 and a right cantilever beam 13 are hinged to the left and right ends of the T-shaped plate 12, respectively. The left and right cantilever beams 14 and 13 can rotate relative to the T-shaped plate 12, allowing them to switch between a folded state (folded along the vertical beam direction) and a lifting state (unfolded along the direction perpendicular to the vertical beam). In the unfolded state, the left and right cantilever beams extend to both sides, providing a wide lifting span; in the folded state, the left and right cantilever beams fold to the vertical beam direction, significantly reducing the length of the I-beam assembly, facilitating transportation and storage, and solving the problems of large space occupation and difficult transportation of the tooling itself.

[0035] The four ends of the I-beam assembly 1 are detachably connected to hanging plates 7 by bolts. (Refer to...) Figures 10 to 13 A square hole is provided in the middle of the hanging plate 7, through which it is fitted onto the end of the I-beam assembly 1. Along the length of the hanging plate 7, symmetrical rope mounting holes are provided at both ends of the square hole. The rope mounting holes are used to directly connect the wire rope or to connect the wire rope through shackles. The installation positions of the hanging plates at both ends of the I-beam assembly 1 are limited by bolts, which facilitates the assembly and disassembly of the hanging plates and reflects the modular design features.

[0036] The wire rope assembly 2 includes an upper lifting wire rope and a lower suspension wire rope. (See reference...) Figure 2 and Figure 3 The lower end of the upper lifting wire rope is connected to the lifting rope mounting holes on the upper part of the lifting plates 7 at each end of the I-beam assembly 1, and the upper end converges to a lifting ring to form a lifting point for connection with a crane or trolley. The upper end of the lower suspension wire rope is connected to the lifting rope mounting holes on the lower part of each lifting plate 7, and the lower end is independently connected to a square hook assembly 4 and a round hook assembly 3. The wire ropes of the wire rope assembly 2 have connecting rings formed by loop knots at both ends to form an adjustable length connection structure, which facilitates length adaptation on site according to the center of gravity of the platform assembly.

[0037] The suspension wire ropes used to suspend the square hook assembly 4 and the round hook assembly 3 have different lengths, forming an asymmetrical suspension structure. Since the power system and other heavier components are concentrated at the rear of the platform assembly, the center of gravity is shifted rearward. The lengths of the suspension wire ropes connecting the rear square hook assembly 4 and the front round hook assembly 3 are pre-configured to be different according to the center of gravity offset. This facilitates center of gravity control of the platform assembly during lifting and increases lifting safety.

[0038] Round hook assembly 3 and square hook assembly 4 (refer to) Figure 6 and Figure 7The circular hook assembly 3 includes a mounting plate and a column. The mounting plate is integrally formed from a square part and a semi-circular part. The square part has an oblong hole, and the vertical end of the square part has a mounting hole perpendicular to the oblong hole. The semi-circular part has a circular hole. Two symmetrically arranged small cylinders are integrally formed on the side wall of the column. The column passes horizontally through the oblong hole and has a limit bolt at its end. The two small cylinders are inserted into the mounting holes and have limit bolts on their upper parts to form a hook structure. By adjusting the limit bolts at the ends of the column and cylinders, the overall axial length of the hook assembly can be controlled, allowing for fine-tuning of the height of each lifting point before and during lifting. Combined with the adjustable wire rope length, this precisely locks the center of gravity of the asymmetrical platform assembly, effectively preventing tilting and swaying during lifting.

[0039] The square hook assembly 4 and the round hook assembly 3 have the same structure, the only difference being that the mounting plate of the square hook assembly 4 is square in shape, and the hole at its lower end for connecting the crossbeam assembly is square. The end of the suspension wire rope away from the hanging plate 7 is attached to the column of either the square hook assembly 4 or the round hook assembly 3. Both the round hook assembly 3 and the square hook assembly 4 are assembled from multiple parts, facilitating disassembly, transportation, and storage, and the shackles are easy to install and remove.

[0040] The crossbeam assembly 5 is detachably connected to the lower end of the square hook assembly 4. (Refer to...) Figure 8 and Figure 14 The crossbeam assembly 5 is a square tube structure. The square tube of the crossbeam assembly 5 passes through the square hole of the square hook assembly 4, and both ends are secured by bolts for easy disassembly and adjustment. The crossbeam assembly 5 is configured to be installed from the rear of the platform assembly to its bottom and secured by fasteners, thus providing a lifting force point for the rear of the platform where there is no direct lifting point. The structure of the crossbeam assembly 5 is designed according to the lifting position structure at the bottom of the lifting platform, cleverly utilizing the platform's bottom structure. A rubber pad 51 is laid on the upper surface of the crossbeam assembly 5 that contacts the platform assembly, preventing damage to the paint and structure of the platform assembly during lifting and protecting the equipment.

[0041] The lifting shaft assembly 6 is detachably connected to the lower end of the circular hook assembly 3. (Refer to...) Figure 9 The lifting shaft assembly 6 is a hollow circular tube, which is lightweight due to its hollow structure. The hollow circular tube of the lifting shaft assembly 6 passes through the circular hole of the circular hook assembly 3 and is used to pass through and connect to the existing lifting position at the front end of the platform assembly. Of the two opposite ends of the lifting shaft assembly 6, one end is the detachable end, which is limited by bolts for easy disassembly and assembly; the other end is the non-detachable end, which is limited by a welded ring.

[0042] The excavator upper platform lifting device provided in this embodiment forms a complete asymmetrical lifting system through the coordinated operation of modular I-beam assemblies, crossbeam assemblies, and various hook assemblies. The crossbeam assembly creates lifting points at the rear of the platform that were not originally present; the asymmetrical length of the suspension wire rope and the adjustable length of the hook assembly jointly solve the leveling difficulties caused by the offset center of gravity; the foldable I-beam solves the problem of transporting and storing the tooling itself; and the detachable connections between all components enhance the tooling's versatility and adaptability.

[0043] Example 2: This example illustrates a method for hoisting the upper platform assembly of an excavator using the hoisting device described in Example 1, especially for its asymmetrical structure and special working conditions where there are no hoisting points at the rear.

[0044] The superstructure assembly integrates key components such as the power system, hydraulic system, driver's cab, and engine hood. It is large, heavy, and asymmetrically laid out, with the weight concentrated at the rear, resulting in a rearward-biased center of gravity that is difficult to calculate precisely. Furthermore, the rear of the platform lacks lifting lugs or points for direct hoisting, while the front of the platform has existing hoisting positions for axle insertion.

[0045] In view of the special structure of the platform assembly, the hoisting principle of the present invention is as follows: First, the crossbeam assembly 5 is inserted into the rear bottom structure of the platform assembly and limited, creating a reliable lifting force point for the rear of the platform without lifting points; Second, the wide hoisting span provided by the I-beam assembly 1 is used to adapt to the rearward center of gravity of the platform assembly by using asymmetrical suspension wire ropes of different pre-configured lengths, so that the rear lifting points obtain an initial suspension length that matches the weight distribution; Finally, during the hoisting process, the effective suspension height of each lifting point is finely adjusted by the length adjustment mechanism at the top of the square hook assembly 4 and the round hook assembly 3 until the platform assembly is horizontally lifted, thereby accurately finding and controlling its center of gravity.

[0046] The specific hoisting steps are as follows: 1. Assemble I-beam assembly 1: Unfold the left cantilever beam 14 and the right cantilever beam 13 from their retracted state, so that they are in a hoisting state perpendicular to the vertical beam direction, and tighten them with bolts to limit their position, forming a load-bearing frame; 2. Assemble the square hook assembly 4 and the round hook assembly 3: Insert the uprights of each hook assembly into the corresponding holes in the mounting plate, and pre-adjust the top limit bolts to the appropriate length; 3. Connect the assembled square hook assembly 4 and round hook assembly 3 to the I-beam assembly 1 via the hanging plate 7 and wire rope assembly 2. The square hook assembly 4 is installed below the rear hanging plate of the I-beam assembly 1, and the round hook assembly 3 is installed below the front hanging plate. Specifically, connect the lifting wire rope of the wire rope assembly 2 to the lifting rope mounting hole on the upper part of each hanging plate 7 through a shackle, connect the upper end of the suspension wire rope to the lifting rope mounting hole on the lower part of each hanging plate 7, and hang the lower end of the suspension wire rope on the column of the corresponding hook assembly; insert the square tube of the crossbeam assembly 5 into the square hole at the lower end of the square hook assembly 4 and limit it with bolts. Using a crane, the assembled wire rope assembly 2, I-beam assembly 1, crossbeam assembly 5, and each hook assembly are lifted as a whole and moved above the platform assembly. The assembly is then slowly lowered and its position is adjusted. The crossbeam assembly 5 is inserted from the rear of the platform assembly into the preset installation position at its bottom. The crossbeam assembly 5 is then fixed to the rear of the platform assembly with bolts. Align the lower circular hole of the circular hook assembly 3 with the existing hoisting position at the front of the platform assembly, insert the hollow circular tube of the lifting shaft assembly 6 into the circular hole of the circular hook assembly 3 and the hoisting hole at the front of the platform assembly, and limit the disassembly and assembly ends with bolts to complete the front connection. 4. After the hoisting fixtures are installed, lift the platform assembly slowly. Observe its levelness while the platform assembly is suspended off the ground. Use the square hook assembly 4 and the round hook assembly 3 for fine-tuning, and rotate the limit bolts to change the effective axial length of the hook assemblies, independently fine-tuning the suspension height of each lifting point at the front and rear. Through continuous adjustments, coordinating the connection positions of each hook assembly with the I-beam assembly and crossbeam assembly, until the platform assembly is in a horizontal and balanced position after being lifted, subsequent transportation and precise assembly with the chassis can be carried out.

[0047] This method features clear and straightforward operation steps, eliminating the tedious process of repeatedly trying to find the center of gravity. It utilizes the asymmetrical hanging structure and multi-point adjustable function of the tooling, enabling rapid and precise leveling of the asymmetrical heavy-duty platform with no rear lifting points, significantly improving assembly efficiency and lifting safety.

[0048] The excavator upper platform hoisting device provided by this invention has been described in detail above. Specific examples have been used to illustrate the structure and working principle of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the scope of protection of the claims of this invention.

Claims

1. A hoisting device for an excavator's upper platform, characterized in that: include, I-beam assembly (1) has a foldable structure; The wire rope assembly (2) includes an upper lifting wire rope and a lower suspension wire rope; The lower end of the upper lifting wire rope is connected to the I-beam assembly (1), and the upper end converges to a lifting ring to form a lifting point; The upper end of the lower suspension wire rope is connected to the I-beam assembly (1), and the lower end is independently connected to a square hook assembly (4) and a round hook assembly (3). The suspension wire ropes used to suspend the square hook assembly (4) and the round hook assembly (3) have different lengths, forming an asymmetrical suspension structure. A crossbeam assembly (5) is detachably connected to the lower end of the square hook assembly (4). The crossbeam assembly (5) is configured to be installed from the rear of the platform assembly to its bottom and limited by fasteners, thereby providing a lifting force point for the rear of the platform where there is no direct lifting point. The lifting shaft assembly (6) is detachably connected to the lower end of the circular hook assembly (3) and is used to pass through and connect to the existing lifting position at the front end of the platform assembly.

2. The excavator upper platform hoisting device according to claim 1, characterized in that: The I-beam assembly (1) includes a T-shaped beam (11), and a T-shaped plate (12) is fixed to the vertical beam end of the T-shaped beam (11). The left and right ends of the T-shaped plate (12) are respectively hinged to a left cantilever beam (14) and a right cantilever beam (13). The left cantilever beam (14) and the right cantilever beam (13) can rotate relative to the T-shaped plate (12) and can switch between a folded state that is folded along the vertical beam direction and a hoisting state that is unfolded along the direction perpendicular to the vertical beam direction.

3. The excavator upper platform hoisting device according to claim 2, characterized in that: The four ends of the I-beam assembly (1) are detachably connected to the hanging plate (7) by bolts. A square hole is opened in the middle of the hanging plate (7). Along the length of the hanging plate (7), symmetrical hanging rope mounting holes are opened at both ends of the square hole. The hanging rope mounting holes are used to directly connect the wire rope or to connect the wire rope through a shackle.

4. The excavator upper platform hoisting device according to claim 1, characterized in that: The wire rope of the wire rope assembly (2) has two ends connected by a ring knot to form a connection structure with adjustable length.

5. The excavator upper platform hoisting device according to claim 1, characterized in that: The circular hook assembly (3) includes a mounting plate and a column; the mounting plate is integrally formed from a square part and a semi-circular part, the square part has an oblong hole, the vertical end of the square part has a mounting hole perpendicular to the oblong hole, and the semi-circular part has a circular hole. Two symmetrically arranged small cylinders are integrally formed on the side wall of the column. The column passes horizontally through the waist-shaped hole, and the two small cylinders are correspondingly inserted into the mounting hole to form a hook structure.

6. The excavator upper platform hoisting device according to claim 5, characterized in that: The square hook assembly (4) has the same structure as the round hook assembly (3), except that the mounting plate of the square hook assembly (4) is square in shape and the round hole is square.

7. The excavator upper platform hoisting device according to claim 1, characterized in that: The crossbeam assembly (5) is a square tube structure, and its upper end surface, which is used to contact the platform assembly, is covered with a rubber pad (51).

8. The excavator upper platform hoisting device according to claim 1, characterized in that: The hanging shaft assembly (6) is a hollow circular tube. One of its two opposite ends is the disassembly end, which is limited by bolts; the other end is the non-disassembly end, which is limited by a welded ring.

9. The excavator upper platform hoisting device according to claim 3, characterized in that: The hanging plate (7) is fitted onto the end of the I-beam assembly (1) through a square hole in its middle; the upper part of the hanging plate (7) has a rope mounting hole connected to the lifting wire rope, and the lower part has a rope mounting hole connected to the suspension wire rope; the end of the suspension wire rope away from the hanging plate (7) is fitted onto the column of the square hook assembly (4) or the round hook assembly (3).

10. The excavator upper platform hoisting device according to claim 1, characterized in that: The square tube of the beam assembly (5) passes through the square hole of the square hook assembly (4), and the hollow round tube of the shaft assembly (6) passes through the round hole of the round hook assembly (3).

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