Miscellaneous fill grabbing device for construction

Abstract

The miscellaneous fill grabbing device for construction comprises an excavator mechanical arm and a digging claw arranged at the end of the excavator mechanical arm, a mounting plate is arranged at the end of the excavator mechanical arm, and a material shaking mechanism used for controlling the digging claw to shake is arranged at the bottom of the mounting plate. An adjusting mechanism used for controlling rotation and opening and closing of the digging claw is arranged at the bottom of the adjusting mechanism, the digging claw comprises six grab buckets, the six grab buckets form a spherical digging claw after being closed, and a U-shaped groove is formed in the end of the excavator mechanical arm. The digging claw adopts the combination of the six grab buckets, so that soil can be surrounded more comprehensively, the grabbing capacity is improved, and rapid opening and closing of the grab buckets and vertical shaking and rotation of the digging claw can be realized, so that the soil can be effectively screened out, residues of large materials are reduced, large bricks and stones are reserved in the digging claw, the manual operation cost is saved, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of miscellaneous fill grabbing materials, in particular to a miscellaneous fill grabbing material device for construction. Background Art

[0002] During construction on site, it is often necessary to perform rotary drilling on the ground, which is widely used in foundation construction projects such as municipal construction, highway bridges, and high-rise buildings.

[0003] At present, during construction on construction sites, excavators are usually used to grab and dig miscellaneous fill materials. However, the digging claws of the excavators are usually trapezoidal buckets. When grabbing miscellaneous fill materials, the soil, bricks and some gravel are dug into the bucket. Construction workers are required to pick out the bricks and stones in the fill, which consumes a lot of manpower costs and reduces construction efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a miscellaneous fill grabbing device for construction, so as to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A miscellaneous fill grabbing device for construction, comprising an excavator arm and a digging claw arranged at the end of the excavator arm, a mounting plate being provided at the end of the excavator arm, and a shaking mechanism for controlling the shaking of the digging claw being provided at the bottom of the mounting plate, an adjusting mechanism for controlling the rotation and opening and closing of the digging claw being provided at the bottom of the shaking mechanism, the digging claw comprising six grab buckets, and a spherical digging claw is formed when the six grab buckets are closed, a U-shaped groove being provided at the end of the excavator arm, one end of the side wall of the mounting plate being rotatably connected in the U-shaped groove, the excavator arm is located at one end of the mounting plate and the corresponding two side walls are rotatably connected to an arc shaft, and the end of the arc shaft is rotatably connected to a connecting shaft through a rotating shaft, the two connecting shafts are respectively rotatably connected to the side wall of the other end of the mounting plate, a second hydraulic cylinder is provided at the top of the excavator arm, and the end of the second hydraulic cylinder is connected to the rotating shaft at the end of the arc shaft.

[0007] Preferably, the material shaking mechanism includes a support rod, the bottom of the mounting plate is fixedly connected to the support rod, and the end of the support rod is fixedly connected to the support plate, the two ends of the bottom of the support plate are symmetrically fixed with L-shaped plates, and the two L-shaped plates are slidably connected to a lifting seat, the support rod is rotatably connected to a transmission shaft driven by a motor, and the two ends of the transmission shaft are respectively fixedly connected to a cam through the support rod, one end of the bottom of the mounting plate is fixedly installed with a mounting seat, the corresponding two side walls of the support rod are slidably connected to the lifting plate, the bottom of the lifting plate is fixedly connected to the lifting rod, the end of the lifting rod slides through the support plate and is fixedly connected to the lifting seat, the outer side of the lifting rod is located between the lifting plate and the support plate and is provided with a spring, and the adjustment mechanism is connected to the bottom of the lifting seat.

[0008] Preferably, a drive motor is fixedly installed in the mounting seat, and the output shaft end of the drive motor is fixedly connected to the transmission shaft.

[0009] Preferably, the adjustment mechanism includes a support tube, the bottom of the lifting seat is located between two L-shaped plates and is rotatably connected to the support tube through a bearing, an outer gear ring is fixedly installed on the outside of the support tube, and a rotating gear driven by a motor is meshed with the outer gear ring, a first hydraulic cylinder is fixedly installed in the support tube, a hexagonal prism is fixedly connected to the bottom of the support tube, and a sliding rod is slidably connected to the inside of the hexagonal prism, the end of the piston rod of the first hydraulic cylinder extends into the hexagonal prism and is fixedly connected to the sliding rod, and the sliding rod is connected to the digging claw.

[0010] Preferably, a rotating motor is fixedly installed on the bottom of the lifting seat, and the end of the output shaft of the rotating motor is fixedly connected to a rotating gear.

[0011] Preferably, the cross-section of the slide rod is a regular hexagonal structure, the six side walls of the bottom end of the slide rod are all provided with racks, the outside of the hexagonal prism is fixedly connected to a circular convex plate, and the bottom of the circular convex plate is equidistantly and integrally provided with six U-shaped plates, and the bottom end of the U-shaped plate is rotatably connected to a transmission gear, the six transmission gears are respectively meshed with the six racks, the top of the grab bucket is integrally connected to a connecting seat, and the six connecting seats are respectively fixedly connected to the six transmission gears.

[0012] Preferably, the grab bucket is in a petal-shaped structure as a whole, and the end of the grab bucket is in a conical structure.

[0013] Preferably, the side walls of the two L-shaped plates are provided with vertical limiting grooves, and the corresponding two ends of the lifting seat are integrally provided with limiting blocks, and the limiting blocks are slidably connected inside the limiting grooves.

[0014] Preferably, a limiting plate is provided at one end of the sliding rod located inside the hexagonal prism, and the limiting plate is slidably connected to the inside of the hexagonal prism.

[0015] Preferably, sieve holes are provided at equal intervals on the outer side of the grab bucket.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model can efficiently grab and process miscellaneous fill soil and is suitable for slope operations. The digging claws are designed to be spherical, and the digging claws adopt a combination of six grab buckets, which can more comprehensively surround the soil material and improve the grabbing ability. Through the precise control of the hydraulic system, the device can realize the rapid opening and closing of the grab bucket and the up and down shaking and rotation of the digging claws, thereby effectively screening out the soil material and reducing the residue of large pieces of material, so that large pieces of bricks and stones remain in the digging claws, saving labor operation costs, improving construction efficiency, and optimizing construction effects. The efficient and flexible operation mode of the device greatly improves the safety and economy of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 This is a schematic diagram of the connection structure of the material shaking mechanism of the present utility model.

[0020] Figure 3 This is a structural diagram of the material shaking mechanism of the present utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the adjustment mechanism of the present utility model.

[0022] Figure 5 This is a structural schematic diagram of the utility model after the digging claws are opened.

[0023] Figure 6 This is a structural schematic diagram of the utility model after the digging claws are opened.

[0024] Figure 7 This is a schematic diagram of the connection between the transmission gear and the rack when the digging claw is closed in the present utility model.

[0025] In the picture:

[0026] 1. Excavator arm; 2. Mounting plate; 3. Material shaking mechanism; 4. Adjustment mechanism; 5. Digging claw; 6. Support rod; 7. Support plate; 8. L-shaped plate; 9. Transmission shaft; 10. Cam; 11. Mounting seat; 12. Drive motor; 13. Lifting plate; 14. Lifting rod; 15. Spring; 16. Lifting seat; 17. Limiting groove; 18. Limiting block; 19. Support tube; 20. Outer gear ring; 21. Rotating motor; 22. Rotating gear; 23. First hydraulic cylinder; 24. Hexagonal prism; 25. Sliding rod; 26. Rack; 27. Circular convex plate; 28. Transmission gear; 29. Grab bucket; 30. Connecting seat; 31. Sieve hole; 32. Arc shaft; 33. Connecting shaft; 34. Second hydraulic cylinder. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 5 The utility model provides a miscellaneous fill grabbing device for construction, including an excavator mechanical arm 1 and a digging claw 5 arranged at the end of the excavator mechanical arm 1. The end of the excavator mechanical arm 1 is provided with a mounting plate 2, and the bottom of the mounting plate 2 is provided with a shaking mechanism 3 for controlling the shaking of the digging claw 5. The shaking mechanism 3 can shake and screen the miscellaneous fill in the claw area, and the digging claw 5 is provided with a large number of sieve holes 31, so that the digging claw 5 is equivalent to a sieve. When the shaking mechanism 3 shakes, the miscellaneous fill is easily screened out.

[0029] In some embodiments, the bottom of the shaking mechanism 3 is provided with an adjustment mechanism 4 for controlling the rotation and opening and closing of the digging claw 5. Preferably, the digging claw 5 includes six grab buckets 29, and the six grab buckets 29 form a spherical digging claw 5 after closing. The digging claw 5 is designed to be spherical, and the digging claw 5 adopts a combination of six grab buckets 29, which can more comprehensively surround the soil and improve the grabbing ability.

[0030] In some embodiments, a U-shaped groove is provided at the end of the excavator mechanical arm 1, and one end of the side wall of the mounting plate 2 is rotatably connected in the U-shaped groove. The excavator mechanical arm 1 is located on one end of the mounting plate 2, and the corresponding two side walls are rotatably connected with an arc shaft 32, and the end of the arc shaft 32 is rotatably connected to a connecting shaft 33 through a rotating shaft. The two connecting shafts 33 are respectively rotatably connected to the side wall of the other end of the mounting plate 2. A second hydraulic cylinder 34 is provided on the top of the excavator mechanical arm 1, and the end of the second hydraulic cylinder 34 is connected to the rotating shaft at the end of the arc shaft 32.

[0031] It should be noted that, during land construction, when grabbing miscellaneous fill, the grab bucket on the excavator is removed, and the mounting plate 2 provided with the digging claw 5 is installed on the end of the excavator mechanical arm 1. The angle position of the digging claw 5 can be adjusted by operating the second hydraulic cylinder 34 on the excavator mechanical arm 1, so that the digging claw 5 can grab and dig the miscellaneous fill on the slope.

[0032] During grabbing and digging, the first hydraulic cylinder 23 is controlled to work, the piston rod of the first hydraulic cylinder 23 is extended to push the slide bar 25 downward, and the slide bar 25 with a regular hexagonal cross section pushes the six racks 26 downward. The racks 26 and the transmission gear 28 are meshed and connected, so that the transmission gear 28 rotates to a certain extent. The rotation of the transmission gear 28 drives the connecting seat 30 to rotate, so that the grab bucket 29 is opened, and the excavator mechanical arm 1 controls the grab bucket 29 to be placed at the miscellaneous fill grabbing and digging position, and then the piston rod of the first hydraulic cylinder 23 is retracted, and the rack 26 moves up, so that multiple grab buckets 29 are closed to grab the miscellaneous fill. After grabbing, the drive motor 12 and the rotation motor 21 are controlled The rotating motor 21 rotates the rotating gear 22, and the supporting cylinder 19 is rotated through the meshing connection between the rotating gear 22 and the outer gear ring 20, thereby driving the digging claw 5 to rotate after grabbing the miscellaneous fill soil; at the same time, the driving motor 12 drives the two cams 10 to rotate. During the rotation of the cam 10, the lifting plate 13 slides on the side wall of the support rod 6, thereby causing the digging claw 5 to move back and forth up and down. The digging claw 5 rotates itself while shaking up and down, so that the internal soil material can leak out through the sieve hole 31, while bricks and stones remain in the digging claw 5. At the same time, the rotation of the digging claw 5 enables the internal material to be stirred, thereby accelerating the screening of the soil material.

[0033] See also Figure 2 and Figure 3 In some embodiments, the material shaking mechanism 3 includes a support rod 6, a support plate 7, an L-shaped plate 8, a transmission shaft 9, a cam 10, a mounting seat 11, a drive motor 12, a lifting plate 13, a lifting rod 14 and a spring 15. The bottom of the mounting plate 2 is fixedly connected to the support rod 6, and the end of the support rod 6 is fixedly connected to the support plate 7. L-shaped plates 8 are symmetrically fixed at both ends of the bottom of the support plate 7, and the two L-shaped plates 8 are slidably connected with a lifting seat 16. The support rod 6 is rotatably connected with the transmission shaft 9, and the two ends of the transmission shaft 9 pass through the support rod 6 and are fixedly connected to the cam 10.

[0034] It should be noted that a cam 10 is fixedly connected to each end of the transmission shaft 9 , so that when the transmission shaft 9 is controlled to rotate, the two cams 10 can be driven to rotate simultaneously, thus saving driving components.

[0035] In some embodiments, a mounting seat 11 is fixedly installed at one end of the bottom of the mounting plate 2, and a drive motor 12 is fixedly installed in the mounting seat 11, the output shaft end of the drive motor 12 is fixedly connected to the transmission shaft 9, the corresponding two side walls of the support rod 6 are slidably connected with a lifting plate 13, the bottom of the lifting plate 13 is fixedly connected with a lifting rod 14, the end of the lifting rod 14 slides through the support plate 7 and is fixedly connected to the lifting seat 16, a spring 15 is provided on the outside of the lifting rod 14 between the lifting plate 13 and the support plate 7, and the adjustment mechanism 4 is connected to the bottom of the lifting seat 16.

[0036] It should be noted that after the digging claw 5 grabs the miscellaneous fill, the driving motor 12 and the rotating motor 21 are controlled to work. The rotating motor 21 works to rotate the rotating gear 22, and the supporting tube 19 is rotated through the meshing connection between the rotating gear 22 and the outer gear ring 20, thereby driving the digging claw 5 to rotate after grabbing the miscellaneous fill; at the same time, the driving motor 12 works to drive the two cams 10 to rotate. During the rotation of the cam 10, the lifting plate 13 slides on the side wall of the support rod 6, thereby causing the digging claw 5 to move back and forth up and down. The digging claw 5 rotates itself while shaking up and down, so that the internal soil can leak out through the sieve hole 31, while bricks and stones remain in the digging claw 5. At the same time, the rotation of the digging claw 5 enables the internal material to be stirred, thereby accelerating the screening of the soil.

[0037] See also Figure 4 and Figure 7 In some embodiments, the adjustment mechanism 4 includes a support tube 19. The bottom of the lifting seat 16 is located between the two L-shaped plates 8 and is rotatably connected to the support tube 19 through a bearing. An outer gear ring 20 is fixedly installed on the outside of the support tube 19. A rotating motor 21 is fixedly installed on the bottom of the lifting seat 16, and the output shaft end of the rotating motor 21 is fixedly connected to a rotating gear 22. The rotating gear 22 and the outer gear ring 20 are meshed and connected. A first hydraulic cylinder 23 is fixedly installed in the support tube 19. A hexagonal prism 24 is fixedly connected to the bottom of the support tube 19, and a sliding rod 25 is slidably connected inside the hexagonal prism 24. The piston rod end of the first hydraulic cylinder 23 extends into the hexagonal prism 24 and is fixedly connected to the sliding rod 25. The sliding rod 25 is connected to the digging claw 5.

[0038] It should be noted that in some embodiments, the setting of the adjustment mechanism 4 can control the opening and closing of the digging claw 5, which is convenient for grabbing miscellaneous fill soil. By controlling the operation of the first hydraulic cylinder 23, the piston rod of the first hydraulic cylinder 23 is extended to push the slide bar 25 down, and the slide bar 25 with a regular hexagonal cross-section pushes the six racks 26 down. Through the meshing connection between the rack 26 and the transmission gear 28, the transmission gear 28 rotates to a certain extent. The rotation of the transmission gear 28 drives the connecting seat 30 to rotate, thereby opening the grab bucket 29, and the excavator mechanical arm 1 controls the grab bucket 29 to be placed at the miscellaneous fill soil grabbing and digging position, and then the piston rod of the first hydraulic cylinder 23 is retracted, and the rack 26 moves up, so that multiple grab buckets 29 are retracted and closed to grab the miscellaneous fill soil, thereby realizing the grabbing of the miscellaneous fill soil. The digging claw 5 is designed to be spherical, and the digging claw 5 adopts a combination of six grab buckets 29, which can more comprehensively surround the soil material and improve the grabbing ability.

[0039] See also Figure 5 、 Figure 6 and Figure 7In some embodiments, the cross-section of the slide rod 25 is a regular hexagonal structure, and the six side walls at the bottom end of the slide rod 25 are each provided with a rack 26. A circular convex plate 27 is fixedly connected to the outside of the hexagonal prism 24, and six U-shaped plates are equidistantly and integrally provided at the bottom of the circular convex plate 27. The bottom end of the U-shaped plate is rotatably connected to a transmission gear 28, and the six transmission gears 28 are respectively meshed with the six racks 26. The top of the grab 29 is integrally connected with a connecting seat 30, and the six connecting seats 30 are respectively fixedly connected to the six transmission gears 28.

[0040] It should be noted that, in some embodiments, the digging claw 5 is composed of six grab buckets 29 of equal size, the cross-section of the slide bar 25 is a regular hexagonal structure, and the connecting seats 30 on the top of the six grab buckets 29 are respectively fixed to six transmission gears 28, and the transmission gears 28 are meshed with the rack 26. When the transmission gear 28 rotates, the rotation angle of the grab bucket 29 can be controlled, thereby controlling the opening and closing of the digging claw 5, thereby realizing the process of grabbing and releasing the miscellaneous fill.

[0041] See also Figure 5 In some embodiments, the grab bucket 29 is formed into a petal-shaped structure as a whole, and the end of the grab bucket 29 is formed into a conical structure.

[0042] It should be noted that in some embodiments, the grab bucket 29 is an overall petal-shaped structure, and the six grab buckets 29 are connected to form a digging claw 5. The digging claw 5 is an overall spherical structure, so that the grabbed miscellaneous fill is completely enclosed inside the digging claw 5, which can more comprehensively surround the grabbed material and improve the grabbing ability.

[0043] See also Figure 5 In some embodiments, the side walls of the two L-shaped plates 8 are provided with vertical limit grooves 17, and the corresponding ends of the lifting seat 16 are integrally provided with limit blocks 18, and the limit blocks 18 are slidably connected to the inside of the limit grooves 17.

[0044] It should be noted that in some embodiments, during the lifting and sliding process of the lifting seat 16, the limit blocks 18 at both ends of the lifting seat 16 are slidably connected inside the two limit grooves 17, so that the lifting seat 16 can stably lift and slide in the vertical direction.

[0045] See also Figure 4 In some embodiments, a limit plate is provided at one end of the sliding rod 25 located inside the hexagonal prism 24 , and the limit plate is slidably connected to the inside of the hexagonal prism 24 .

[0046] It should be noted that, in some embodiments, a limit plate is integrally provided at one end of the slide bar 25 located inside the hexagonal prism 24. During the descent of the slide bar 25, the rack 26 is driven to descend. The limit plate can limit the sliding distance of the slide bar 25, so that the rack 26 slides down a fixed distance, and the transmission gear 28 rotates at a certain angle, thereby controlling the rotation angle of the grab bucket 29 and controlling the opening of the grab bucket 29.

[0047] See also Figure 5 and Figure 6 In some embodiments, sieve holes 31 are equidistantly provided on the outer side of the grab bucket 29 .

[0048] It should be noted that by providing a plurality of sieve holes 31 on the grab 29, the material inside the digging claw 5 is stirred and vibrated to a certain extent during the process of controlling the up and down shaking and rotation of the digging claw 5. The setting of the plurality of sieve holes 31 on the grab 29 enables the entire digging claw 5 to form a spherical screen, and the soil material is quickly screened out during the stirring and vibration of the material in the digging claw 5.

[0049] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.

[0051] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0052] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A miscellaneous fill grabbing device for construction, characterized in that: The invention comprises an excavator mechanical arm (1) and a digging claw (5) arranged at the end of the excavator mechanical arm (1); a mounting plate (2) is arranged at the end of the excavator mechanical arm (1); a material shaking mechanism (3) for controlling the shaking of the digging claw (5) is arranged at the bottom of the mounting plate (2); an adjusting mechanism (4) for controlling the rotation and opening and closing of the digging claw (5) is arranged at the bottom of the material shaking mechanism (3); the digging claw (5) comprises six grabs (29), and the six grabs (29) form a spherical digging claw (5) after closing; the end of the excavator mechanical arm (1) is arranged A U-shaped groove is provided, one end of the side wall of the mounting plate (2) is rotatably connected in the U-shaped groove, the excavator mechanical arm (1) is located at one end of the mounting plate (2), and the corresponding two side walls are rotatably connected with an arc shaft (32), and the end of the arc shaft (32) is rotatably connected to a connecting shaft (33) through a rotating shaft, and the two connecting shafts (33) are respectively rotatably connected to the side wall of the other end of the mounting plate (2), and a second hydraulic cylinder (34) is provided on the top of the excavator mechanical arm (1), and the end of the second hydraulic cylinder (34) is connected to the rotating shaft at the end of the arc shaft (32).

2. A construction fill grabbing device according to claim 1, characterized in that: The shaking material mechanism (3) includes a support rod (6), the bottom of the mounting plate (2) is fixedly connected to the support rod (6), the end of the support rod (6) is fixedly connected to the support plate (7), L-shaped plates (8) are symmetrically fixed at both ends of the bottom of the support plate (7), and a lifting seat (16) is slidably connected in the two L-shaped plates (8). A transmission shaft (9) driven by a motor is rotatably connected in the support rod (6), and the two ends of the transmission shaft (9) are respectively passed through the support rod (6) and fixedly connected to cams (10). A mounting seat (11) is fixedly mounted on one end of the bottom of the mounting plate (2), and corresponding side walls of the support rod (6) are slidably connected to a lifting plate (13). The bottom of the lifting plate (13) is fixedly connected to a lifting rod (14), and the end of the lifting rod (14) slides through the support plate (7) and is fixedly connected to the lifting seat (16). A spring (15) is sleeved on the outer side of the lifting rod (14) and is located between the lifting plate (13) and the support plate (7). The adjusting mechanism (4) is connected to the bottom of the lifting seat (16).

3. A construction fill grabbing device according to claim 2, characterized in that: A drive motor (12) is fixedly mounted in the mounting seat (11), and the output shaft end of the drive motor (12) is fixedly connected to the transmission shaft (9).

4. The miscellaneous fill grabbing device for construction according to claim 2, characterized in that: The adjusting mechanism (4) includes a support tube (19). The bottom of the lifting seat (16) is located between two L-shaped plates (8) and is rotatably connected to the support tube (19) through a bearing. An outer gear ring (20) is fixedly installed on the outer side of the support tube (19). A rotating gear (22) driven by a motor is meshed with the outer gear ring (20). A first hydraulic cylinder (23) is fixedly installed inside the support tube (19). A hexagonal prism (24) is fixedly connected to the bottom of the support tube (19), and a sliding rod (25) is slidably connected inside the hexagonal prism (24). The end of the piston rod of the first hydraulic cylinder (23) extends into the hexagonal prism (24) and is fixedly connected to the sliding rod (25). The sliding rod (25) is connected to the digging claw (5).

5. The miscellaneous fill grabbing device for construction according to claim 4, characterized in that: A rotating motor (21) is fixedly mounted on the bottom of the lifting seat (16), and a rotating gear (22) is fixedly connected to the end of the output shaft of the rotating motor (21).

6. The miscellaneous fill grabbing device for construction according to claim 4, characterized in that: The cross section of the slide bar (25) is a regular hexagonal structure. The six side walls at the bottom end of the slide bar (25) are all provided with racks (26). The outside of the hexagonal prism (24) is fixedly connected with a circular convex plate (27), and the bottom of the circular convex plate (27) is equidistantly provided with six U-shaped plates, and the bottom end of the U-shaped plate is rotatably connected with a transmission gear (28). The six transmission gears (28) are respectively meshed and connected with the six racks (26). The top of the grab bucket (29) is integrally connected with a connecting seat (30), and the six connecting seats (30) are respectively fixedly connected with the six transmission gears (28).

7. The miscellaneous fill grabbing device for construction according to claim 1, characterized in that: The grab bucket (29) is in a petal-shaped structure as a whole, and the end of the grab bucket (29) is in a conical structure.

8. The miscellaneous fill grabbing device for construction according to claim 2, characterized in that: The side walls of the two L-shaped plates (8) are both provided with vertical limiting grooves (17), and the corresponding two ends of the lifting seat (16) are both integrally provided with limiting blocks (18), and the limiting blocks (18) are slidably connected inside the limiting grooves (17).

9. The miscellaneous fill grabbing device for construction according to claim 4, characterized in that: A limiting plate is provided at one end of the sliding rod (25) located inside the hexagonal prism (24), and the limiting plate is slidably connected inside the hexagonal prism (24).

10. The miscellaneous fill grabbing device for construction according to claim 1, characterized in that: The outer side of the grab bucket (29) is provided with sieve holes (31) at equal intervals.

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