Excavator platform fitting device

Abstract

The utility model discloses an excavator platform fitting device which comprises a first-stage main body carrying pole lifting beam, a second-stage counterweight hole lifting tool and a third-stage movable arm rear support lifting tool, and the second-stage counterweight hole lifting tool and the third-stage movable arm rear support lifting tool are both hung on the first-stage main body carrying pole lifting beam. And during hoisting and sleeving, the second-stage counterweight hole hoisting tool and the third-stage movable arm rear support hoisting tool are fixedly mounted on an upper platform of the excavator respectively. According to the excavator platform sleeving device, the upper platform of the excavator can be conveniently hoisted during sleeving, the problem that the excavator platform is difficult to sleeve is solved, the safety risk hidden danger of assembly of workers is eliminated while assembly of the workers is facilitated, the labor intensity of the workers is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of excavator assembly and installation technology, and in particular to an excavator platform assembly device. Background Technology

[0002] Excavators, as a fast, efficient, and currently mainstream construction machinery, are a major type of engineering machinery and one of the main mechanical equipment in earthwork construction projects. They are widely used in mechanized construction in industries such as industrial and civil buildings, transportation, water conservancy and hydropower projects, farmland improvement, mining, tunnel development, and modern military engineering.

[0003] As the excavator industry improves and market demand continues to rise, the requirements for excavator assembly quality and efficiency are also increasing. Currently, during excavator platform assembly, the mounting holes for the boom cylinder are occupied, preventing the cylinder from being installed on the platform. Figure 1 The middle component 40 is the boom cylinder. The boom cylinder 40 occupies the original lifting hole position on the upper platform of the excavator, which affects the lifting and assembly operation of the upper platform of the excavator when it is assembled. This reduces the efficiency of excavator assembly and installation, and increases the difficulty and cost of excavator assembly and installation. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the present invention provides an excavator platform assembly device, which facilitates the hoisting of the upper platform of the excavator during assembly, solves the problem of difficult excavator platform assembly, facilitates assembly by workers, eliminates safety risks during assembly, reduces the labor intensity of workers and improves assembly efficiency.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] An excavator platform assembly includes a primary main spreader beam, a secondary counterweight hole hoisting fixture, and a tertiary boom rear support hoisting fixture, wherein the secondary counterweight hole hoisting fixture and the tertiary boom rear support hoisting fixture are both suspended on the primary main spreader beam.

[0007] During hoisting and assembly, the secondary counterweight hole hoisting fixture and the tertiary boom rear support hoisting fixture are both fixedly installed on the upper platform of the excavator.

[0008] Furthermore: the primary main load-bearing beam includes a main load-bearing frame, with at least two upper lifting crossbeams above the main load-bearing frame and at least two lower lifting crossbeams below the main load-bearing frame;

[0009] The upper lifting beam and the lower lifting beam are respectively provided with an upper balance lifting hole and a lower balance lifting hole;

[0010] The first set of steel wire ropes is connected to the upper balance lifting hole, and the first set of steel wire ropes is lifted by the crane;

[0011] A second set of wire ropes is connected to the lower balance lifting hole. The second set of wire ropes is used to lift the secondary counterweight hole lifting fixture and the tertiary boom rear support lifting fixture.

[0012] Furthermore: both the upper lifting beam and the lower lifting beam are welded to the main load-bearing frame;

[0013] The upper lifting beam is provided with two upper balance lifting holes. The first set of wire ropes includes at least two sets of four-legged wire ropes. One set of four-legged wire ropes is fixedly connected to the two upper balance lifting holes on the upper lifting beam.

[0014] The lower lifting beam is provided with two lower balance lifting holes, and the second set of wire ropes includes at least four sets of single-leg wire ropes, with one set of single-leg wire ropes fixedly connected to one of the lower balance lifting holes on the lower lifting beam.

[0015] Furthermore: the secondary counterweight hole hoisting fixture includes an upper crossbeam, a lower crossbeam, and at least two transverse limiting plates, wherein the transverse limiting plates fix the upper crossbeam and the lower crossbeam together as a whole;

[0016] A connecting beam is provided on the upper surface of the upper beam, and at least two transition lifting holes are provided on the connecting beam. The primary main spreader beam lifts the secondary counterweight lifting fixture through the transition lifting holes.

[0017] The upper and lower crossbeams are equipped with connection mechanisms for connecting to the upper platform of the excavator.

[0018] Further: The connecting mechanism includes an upper pin hole provided on the upper crossbeam and a lower pin hole provided on the lower crossbeam. The upper pin hole and the lower pin hole are opposite to each other, and a limiting hole pin passes through and is connected in the upper pin hole. The bottom of the limiting hole pin passes through the lower pin hole.

[0019] During hoisting, the upper platform of the excavator passes between the upper crossbeam and the lower crossbeam, and the limiting hole pin passes through the upper platform of the excavator.

[0020] Furthermore: the transverse limiting plate is welded to the upper crossbeam and the lower crossbeam;

[0021] A first connecting rib is fixedly connected to the transverse limiting plate, and the first connecting rib is welded to the upper crossbeam and the lower crossbeam.

[0022] The connecting crossbeam is welded to the upper crossbeam, and a second connecting stiffener is provided between the connecting crossbeam and the upper crossbeam. The second connecting stiffener is welded to the connecting crossbeam and the upper crossbeam.

[0023] Furthermore, both the upper and lower pin holes are provided in at least two sets, and each upper pin hole is necessarily opposite to a lower pin hole.

[0024] Furthermore: the lifting fixture for the rear support of the three-stage boom includes a main load-bearing limiting frame, suspension lugs, and an adjustable support shaft;

[0025] The suspension lugs are provided in at least two sets, and both are fixedly connected to the main load-bearing limiting frame;

[0026] The adjustable support shaft passes through the main load-bearing limiting frame;

[0027] During hoisting, the adjustable support shaft is connected to the upper platform of the excavator, and the suspension lug is hoisted to the primary main spreader beam.

[0028] Furthermore: the main load-bearing limiting frame is provided with several clearance grooves, and a movable limiting rod is fixedly connected to the outer wall of the adjustable support shaft, the movable limiting rod passing through the clearance grooves.

[0029] Furthermore: On the main load-bearing limiting frame, along the axial direction of the adjustable support shaft, a plurality of limiting grooves are provided. The limiting grooves are located within the clearance grooves, and the width of the limiting grooves is adapted to the outer diameter of the movable limiting rod. After the adjustable support shaft is connected to the upper platform of the excavator, the movable limiting rod is placed within the limiting grooves.

[0030] In summary, the excavator platform assembly device provided by this utility model has the following technical effects:

[0031] 1. A primary main spreader beam lifting fixture, a secondary counterweight hole lifting fixture, and a tertiary boom rear support lifting fixture are installed to enable the excavator's upper platform to be lifted during assembly. In particular, the installation of the tertiary boom rear support lifting fixture solves the problem in existing technologies where the boom cylinder on the excavator's upper platform occupies the original lifting hole positions on the excavator's upper platform, making it difficult to lift the excavator's upper platform during assembly. This not only facilitates assembly for workers but also eliminates safety risks during assembly, reduces the labor intensity of workers, and improves assembly efficiency.

[0032] 2. The structure of the primary main spreader beam ensures that the secondary counterweight hole hoisting fixture and the tertiary boom rear support hoisting fixture maintain the balance of the excavator's upper platform during hoisting.

[0033] 3. The setting of the limit hole pin ensures a reliable connection between the secondary counterweight hole hoisting tool and the upper platform of the excavator.

[0034] 4. The design of the clearance groove and the movable limit rod facilitates the connection between the adjustable support shaft and the upper platform of the excavator.

[0035] 5. The setting of the limit groove and the movable limit rod ensures a reliable connection between the adjustable support shaft and the upper platform of the excavator, and prevents the adjustable support shaft from sliding within the upper platform of the excavator. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the hoisting state of an excavator platform assembly device according to the present invention.

[0037] Figure 2 This is a schematic diagram of one embodiment of the excavator platform assembly device of this utility model.

[0038] Figure 3 This is a schematic diagram of the structure of the primary main body spreader beam in the technical solution of this utility model.

[0039] Figure 4 This is a schematic diagram of the secondary counterweight hole hoisting fixture in the technical solution of this utility model.

[0040] Figure 5 This is a schematic diagram of the three-stage boom rear support hoisting fixture in the technical solution of this utility model.

[0041] The meanings of the reference numerals in the attached figures are as follows:

[0042] A. First set of wire ropes; B. Second set of wire ropes; 1. Primary main spreader beam; 2. Secondary counterweight hole lifting fixture; 3. Tertiary boom rear support lifting fixture; 5. Excavator upper platform; 6. Main load-bearing frame; 7. Upper balance lifting hole; 71. Upper lifting crossbeam; 8. Lower balance lifting hole; 81. Lower lifting crossbeam; 9. Transition lifting hole; 10. Lower crossbeam; 11. Limiting hole pin; 12. Lateral limiting plate; 13. Excavator counterweight beam; 14. Upper crossbeam; 15. Connecting crossbeam; 16. Upper pin hole; 17. Lower pin hole; 18. Second connecting stiffener; 19. First connecting stiffener; 21. Main load-bearing limiting frame; 22. Suspension lug; 23. Adjustable support shaft; 24. Clearance groove; 25. Moving limit rod; 26. Limiting groove; 27. Lifting hole; 40. Boom cylinder. Detailed Implementation

[0043] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0044] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0046] like Figure 1 As shown, in the upper platform 5 of the excavator, the boom cylinder 40 occupies the original lifting hole position on the upper platform, which affects the lifting and assembly operation of the upper platform during assembly. To solve this problem, this utility model provides an excavator platform assembly device. This excavator platform assembly device solves the problem of insufficient or no lifting position due to the boom cylinder 40 occupying the original lifting hole position on the upper platform. The combination and cooperation of the secondary counterweight hole lifting fixture 2 and the tertiary boom rear support lifting fixture 3 solves the problem. The excavator platform assembly device of this solution is described in detail below.

[0047] See Figure 1 and Figure 2 This utility model discloses an excavator platform assembly device, which is used to hoist the upper platform of the excavator when assembling the upper platform 5 of the excavator.

[0048] An excavator platform assembly includes a primary main beam 1, a secondary counterweight hole hoisting fixture 2, and a tertiary boom rear support hoisting fixture 3. Both the secondary counterweight hole hoisting fixture 2 and the tertiary boom rear support hoisting fixture 3 are suspended from the primary main beam 1. During assembly, both fixtures are fixedly installed on the upper platform 5 of the excavator.

[0049] During assembly, the primary main body spreader beam 1 is connected by a crane. Then, the secondary counterweight hole hoisting fixture 2 and the tertiary boom rear support hoisting fixture 3, which are connected to the primary main body spreader beam 1, are lifted. At the same time, since the secondary counterweight hole hoisting fixture 2 and the tertiary boom rear support hoisting fixture 3 are both fixedly installed on the upper platform 5 of the excavator, the upper platform 5 of the excavator is lifted and installed in a suitable position on the excavator, thus realizing the assembly and fitting of the upper platform 5 of the excavator.

[0050] In the above scheme, during hoisting, the secondary counterweight hole hoisting fixture 2 and the tertiary boom rear support hoisting fixture 3 are simultaneously installed on the upper platform 5 of the excavator. In particular, the secondary counterweight hole hoisting fixture 2 solves the problem that the original hoisting hole positions on the upper platform of the excavator are occupied by the boom cylinder 40, resulting in no hoisting position or insufficient hoisting position, thus ensuring that the upper platform 5 of the excavator is hoisted smoothly.

[0051] The above-mentioned technical solution provides an excavator platform assembly device that facilitates the hoisting of the excavator's upper platform during assembly, solving the problem of difficult excavator platform assembly. It not only facilitates assembly for workers but also eliminates safety risks and hazards during assembly, reduces the labor intensity of workers, and improves assembly efficiency.

[0052] In this technical solution, such as Figure 3 As shown, the primary main load-bearing beam 1 includes a main load-bearing frame 6, with at least two upper lifting beams 71 above the main load-bearing frame 6 and at least two lower lifting beams 81 below the main load-bearing frame 6.

[0053] The upper lifting beam 71 and the lower lifting beam 81 are respectively provided with upper balance lifting hole 7 and lower balance lifting hole 8.

[0054] The first set of steel wire ropes A is connected to the upper balance lifting hole 7, and the first set of steel wire ropes A is lifted by the crane.

[0055] The second set of wire ropes B is connected to the lower balance lifting hole 8. The second set of wire ropes B is used to lift the secondary counterweight hole lifting fixture 2 and the third-stage boom rear support lifting fixture 3.

[0056] In the above scheme, the main load-bearing frame 6 of the primary main spreader beam 1 is rectangular in shape. The upper balance lifting hole 7 and the lower balance lifting hole 8 are reasonably set on the main load-bearing frame 6 to ensure that the main load-bearing frame 6 remains balanced when it is lifted.

[0057] In this scheme, by setting up the main load-bearing frame 6, the crane can support the secondary counterweight hole hoisting fixture 2 and the tertiary boom rear support hoisting fixture 3. This provides a connection position for the secondary counterweight hole hoisting fixture 2 and the tertiary boom rear support hoisting fixture 3, ensuring that the secondary counterweight hole hoisting fixture 2 and the tertiary boom rear support hoisting fixture 3 operate smoothly. This avoids problems such as tilting that would occur if the secondary counterweight hole hoisting fixture 2 and the tertiary boom rear support hoisting fixture 3 were directly connected to the crane, thus ensuring the stable operation and reliable movement of the excavator's upper platform.

[0058] In this technical solution, both the upper lifting beam 71 and the lower lifting beam 81 are welded to the main load-bearing frame 6 to ensure the strength and load-bearing capacity of the upper lifting beam 71 and the lower lifting beam 81.

[0059] Two upper balance lifting holes 7 are provided on the upper lifting beam 71. The first set of wire ropes A includes at least two sets of four-legged wire ropes. One set of four-legged wire ropes is fixedly connected to the two upper balance lifting holes 7 on the upper lifting beam 71. The first set of wire ropes A uses four-legged wire ropes to facilitate connection with the upper balance lifting holes 7 on the upper lifting beam 71. One four-legged wire rope is fixedly connected to the two upper balance lifting holes 7 on the upper lifting beam 71 to ensure that the length of the wire ropes connected to the two upper balance lifting holes 7 on the upper lifting beam 71 is consistent, and to ensure that the main load-bearing frame 6 is in a balanced state on the crane.

[0060] The lower lifting beam 81 has two lower balance lifting holes 8. The second set of wire ropes B includes at least four sets of single-leg wire ropes, with each set of single-leg wire ropes fixedly connected to one of the lower balance lifting holes 8 on the lower lifting beam 81. The second set of wire ropes B uses single-leg wire ropes, which facilitates the adjustment of the length of the single-leg wire ropes, enabling a smooth and balanced connection between the secondary counterweight hole lifting fixture 2 and the tertiary boom rear support lifting fixture 3 and the primary main spreader beam 1. It also facilitates the replacement of single-leg wire ropes, allowing for the use of different lengths to adjust the load-bearing capacity of each single-leg wire rope as needed.

[0061] In this technical solution, such as Figure 4 As shown, the secondary counterweight hole hoisting fixture 2 includes an upper crossbeam 14, a lower crossbeam 10, and at least two transverse limiting plates 12, which fix the upper crossbeam 14 and the lower crossbeam 10 together.

[0062] A connecting beam 15 is provided on the upper surface of the upper beam 14. At least two transition lifting holes 9 are provided on the connecting beam 15. The primary main beam 1 is lifted through the transition lifting holes 9 to the secondary counterweight lifting tool 2.

[0063] The upper crossbeam 14 and the lower crossbeam 10 are provided with connection mechanisms for connecting to the upper platform 5 of the excavator.

[0064] In the above scheme, the secondary counterweight hole hoisting fixture 2 serves two purposes: firstly, as a counterweight to ensure the stable lifting of the excavator's upper platform; and secondly, as a fixed connection point for the excavator's upper platform, enabling the excavator's upper platform to connect with the primary main spreader beam 1.

[0065] In the above scheme, the upper crossbeam 14 and the lower crossbeam 10 are set separately and are fixedly connected as a whole by at least two transverse limiting plates 12. There is space between the upper crossbeam 14 and the lower crossbeam 10, which facilitates the installation and connection of the upper platform of the excavator and the connection between the upper platform of the excavator and the secondary counterweight hole hoisting fixture 2. Furthermore, no hoisting hole is required on the upper platform of the excavator, making the installation convenient and flexible.

[0066] In this technical solution, the connecting mechanism includes an upper pin hole 16 provided on the upper crossbeam 14 and a lower pin hole 17 provided on the lower crossbeam 10. The upper pin hole 16 and the lower pin hole 17 are opposite to each other, and a limiting hole pin 11 passes through and is connected in the upper pin hole 16. The bottom of the limiting hole pin 11 passes through the lower pin hole 17.

[0067] During hoisting, the upper platform 5 of the excavator passes between the upper crossbeam 14 and the lower crossbeam 10, and the limiting hole pin 11 passes through the upper platform 5 of the excavator. For example... Figure 2 During hoisting, the excavator's counterweight beam 13 is passed between the upper crossbeam 14 and the lower crossbeam 10, and then the limiting hole pin 11 passes through the excavator's counterweight beam 13. The excavator's upper platform 5 is then connected to the secondary counterweight hole hoisting fixture 2.

[0068] The limiting hole pin 11 limits the secondary counterweight hole hoisting fixture 2, preventing it from falling off the upper platform 5 of the excavator and ensuring a reliable connection between the upper platform 5 of the excavator and the secondary counterweight hole hoisting fixture 2.

[0069] In this technical solution, the transverse limiting plate 12 is welded to the upper crossbeam 14 and the lower crossbeam 10 to ensure the strength and load-bearing capacity of the secondary counterweight hole hoisting fixture 2.

[0070] A first connecting rib plate 19 is fixedly connected to the transverse limiting plate 12, and the first connecting rib plate 19 is welded to the upper crossbeam 14 and the lower crossbeam 10. A connecting crossbeam 15 is welded to the upper crossbeam 14, and a second connecting rib plate 18 is provided between the connecting crossbeam 15 and the upper crossbeam 14, and the second connecting rib plate 18 is welded to both the connecting crossbeam 15 and the upper crossbeam 14. This ensures the reliable and stable structure of the secondary counterweight hole hoisting fixture 2.

[0071] In this technical solution, at least two sets of upper pin holes 16 and lower pin holes 17 are provided, and one upper pin hole 16 must be opposite to one lower pin hole 17, so that the limiting pin 11 can pass through the upper pin hole 16 and the lower pin hole 17. At least two sets of upper pin holes 16 and lower pin holes 17 are provided, so that the limiting pin 11 can pass through different positions on the excavator's counterweight beam 13, facilitating the connection between the excavator's counterweight beam 13 and the secondary counterweight hole lifting fixture 2.

[0072] In this technical solution, such as Figure 5 As shown, the lifting fixture 3 for the rear support of the three-stage boom includes a main load-bearing limiting frame 21, suspension lugs 22, and an adjustable support shaft 23. At least two sets of suspension lugs 22 are provided, both of which are fixedly connected to the main load-bearing limiting frame 21. Lifting holes 27 are provided on the suspension lugs 22, and the lifting holes 27 are connected to the primary main beam 1 via the aforementioned second set of wire ropes B.

[0073] The adjustable support shaft 23 passes through the main load-bearing limiting frame 21. During hoisting, the adjustable support shaft 23 is connected to the upper platform 5 of the excavator, and the suspension lug 22 is hoisted to the primary main spreader beam 1.

[0074] The three-stage boom rear support hoisting fixture 3 connects to the existing hoisting hole on the excavator's upper platform 5, thereby enabling the hoisting of the excavator's upper platform.

[0075] The three-stage boom rear support hoisting fixture 3 structure simultaneously achieves installation and connection with the excavator's upper platform 5, and is also hoisted with the primary main spreader beam 1. The structure is simple and reliable.

[0076] In this technical solution, the main load-bearing limiting frame 21 is provided with several clearance grooves 24, and a movable limiting rod 25 is fixedly connected to the outer wall of the adjustable support shaft 23, passing through the clearance grooves 24. The movable limiting rod 25 provides a position for the adjustment and operation of the adjustable support shaft 23, facilitating the adjustment of the adjustable support shaft 23 and enabling the connection between the adjustable support shaft 23 and the original hoisting hole on the upper platform 5 of the excavator.

[0077] In this technical solution, a plurality of limiting grooves 26 are provided on the main load-bearing limiting frame 21 along the axial direction of the adjustable support shaft 23. The limiting grooves 26 are located within the clearance grooves 24, and the width of the limiting grooves 26 is adapted to the outer diameter of the movable limiting rod 25. After the adjustable support shaft 23 is connected to the upper platform 5 of the excavator, the movable limiting rod 25 is placed within the limiting grooves 26. The setting of the limiting grooves 26 realizes the axial limitation of the adjustable support shaft 23, avoiding the problem of the adjustable support shaft 23 moving and falling off the upper platform 5 of the excavator after it is connected to the upper platform 5 of the excavator, ensuring reliable connection with the upper platform 5 of the excavator, and realizing the smooth, stable, and balanced hoisting of the upper platform 5 of the excavator.

[0078] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A complete set of excavator platform assembly, characterized in that: It includes a primary main spreader beam, a secondary counterweight hole hoisting fixture, and a tertiary boom rear support hoisting fixture. The secondary counterweight hole hoisting fixture and the tertiary boom rear support hoisting fixture are both suspended on the primary main spreader beam. During hoisting and assembly, the secondary counterweight hole hoisting fixture and the tertiary boom rear support hoisting fixture are both fixedly installed on the upper platform of the excavator.

2. The excavator platform assembly device according to claim 1, characterized in that: The primary main load-bearing beam includes a main load-bearing frame, with at least two upper lifting beams above the main load-bearing frame and at least two lower lifting beams below the main load-bearing frame. The upper lifting beam and the lower lifting beam are respectively provided with an upper balance lifting hole and a lower balance lifting hole; The first set of steel wire ropes is connected to the upper balance lifting hole, and the first set of steel wire ropes is lifted by the crane; A second set of wire ropes is connected to the lower balance lifting hole. The second set of wire ropes is used to lift the secondary counterweight hole lifting fixture and the tertiary boom rear support lifting fixture.

3. The excavator platform assembly device according to claim 2, characterized in that: Both the upper lifting beam and the lower lifting beam are welded to the main load-bearing frame. The upper lifting beam is provided with two upper balance lifting holes. The first set of wire ropes includes at least two sets of four-legged wire ropes. One set of four-legged wire ropes is fixedly connected to the two upper balance lifting holes on the upper lifting beam. The lower lifting beam is provided with two lower balance lifting holes, and the second set of wire ropes includes at least four sets of single-leg wire ropes, with one set of single-leg wire ropes fixedly connected to one of the lower balance lifting holes on the lower lifting beam.

4. The excavator platform assembly device according to claim 1, characterized in that: The secondary counterweight hole hoisting fixture includes an upper crossbeam, a lower crossbeam, and at least two transverse limiting plates, wherein the transverse limiting plates fix the upper crossbeam and the lower crossbeam together as a whole; A connecting beam is provided on the upper surface of the upper beam, and at least two transition lifting holes are provided on the connecting beam. The primary main spreader beam lifts the secondary counterweight lifting fixture through the transition lifting holes. The upper and lower crossbeams are equipped with connection mechanisms for connecting to the upper platform of the excavator.

5. The excavator platform assembly according to claim 4, characterized in that: The connecting mechanism includes an upper pin hole on the upper crossbeam and a lower pin hole on the lower crossbeam. The upper pin hole and the lower pin hole are opposite to each other, and a limiting hole pin passes through and is connected in the upper pin hole. The bottom of the limiting hole pin passes through the lower pin hole. During hoisting, the upper platform of the excavator passes between the upper crossbeam and the lower crossbeam, and the limiting hole pin passes through the upper platform of the excavator.

6. The excavator platform assembly device according to claim 4, characterized in that: The transverse limiting plate is welded to the upper crossbeam and the lower crossbeam; A first connecting rib is fixedly connected to the transverse limiting plate, and the first connecting rib is welded to the upper crossbeam and the lower crossbeam. The connecting crossbeam is welded to the upper crossbeam, and a second connecting stiffener is provided between the connecting crossbeam and the upper crossbeam. The second connecting stiffener is welded to the connecting crossbeam and the upper crossbeam.

7. The excavator platform assembly device according to claim 5, characterized in that: Both the upper and lower pin holes are provided in at least two sets, and one upper pin hole must be opposite to one lower pin hole.

8. The excavator platform assembly device according to claim 1, characterized in that: The lifting fixture for the rear support of the three-stage boom includes a main load-bearing limiting frame, suspension lugs, and an adjustable support shaft. The suspension lugs are provided in at least two sets, and both are fixedly connected to the main load-bearing limiting frame; The adjustable support shaft passes through the main load-bearing limiting frame; During hoisting, the adjustable support shaft is connected to the upper platform of the excavator, and the suspension lug is hoisted to the primary main spreader beam.

9. The excavator platform assembly device according to claim 8, characterized in that: The main load-bearing limiting frame is provided with several clearance grooves, and a movable limiting rod is fixed to the outer wall of the adjustable support shaft, the movable limiting rod passing through the clearance grooves.

10. The excavator platform assembly device according to claim 9, characterized in that: On the main load-bearing limiting frame, along the axial direction of the adjustable support shaft, a plurality of limiting grooves are provided. The limiting grooves are located within the clearance grooves, and the width of the limiting grooves is adapted to the outer diameter of the movable limiting rod. After the adjustable support shaft is connected to the upper platform of the excavator, the movable limiting rod is placed in the limiting groove.

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