Square pile grab bucket

Abstract

The utility model belongs to the technical field of foundation pit rotary excavating equipment, and particularly relates to a square pile grab bucket. According to the specific technical scheme, the machine comprises a power connecting square head, a machine frame body, a bucket and a lifting assembly, the power connecting square head is rotationally arranged on the upper portion of the machine frame body, and the lifting assembly is connected with the lower end of the power connecting square head; the buckets are symmetrically arranged on the lower portion of the machine frame body, a connecting arm is hinged to each bucket, the ends, away from the buckets, of the connecting arms are hinged to the lower end of the machine frame body, and the connecting arms on the two buckets are symmetrically arranged. A fixing plate is arranged below the rack main body, the two buckets are hinged to the fixing plate, and the fixing plate is connected with the lifting assembly; the power connection square head rotates, the lifting assembly drives the fixing plate to ascend / descend, and the bucket grabs / releases soil. The hole cleaning mode replaces manual hole cleaning, the safety risk of operators is reduced, and the safety measure cost is also reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotary drilling equipment for foundation pits, and specifically relates to a square pile grab bucket. Background Technology

[0002] With the rapid development of the national economy, the construction technology and quality of pile foundation construction are crucial to improving the technical level of infrastructure. After excavating square pile holes, it is necessary to remove the gravel and debris inside the holes. The traditional method is manual cleaning, which is risky and inefficient. Mechanical cleaning drills are also used, but circular drills cannot clean the debris at the edges of square pile holes. Therefore, it is necessary to provide a hole cleaning device for removing gravel and debris from square pile holes. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a square pile grab bucket.

[0004] To achieve the aforementioned objectives of this utility model, the technical solution adopted is as follows: a square pile grab bucket, comprising a power connection square head, a frame body, a bucket, and a lifting assembly. The power connection square head is rotatably mounted on the upper part of the frame body, and the lifting assembly is connected to the lower end of the power connection square head. The buckets are symmetrically arranged on the lower part of the frame body, and each bucket is hinged with a connecting arm. The end of the connecting arm away from the bucket is hinged to the lower end of the frame body, and the connecting arms on the two buckets are symmetrically arranged. A fixing plate is provided below the frame body, and the two buckets are hinged to the fixing plate. The fixing plate is connected to the lifting assembly. When the power connection square head rotates, the lifting assembly drives the fixing plate to rise / fall, thereby realizing the grabbing / releasing of soil by the bucket.

[0005] Preferably, the power connection square head is fixedly connected to the drill rod of the rotary drilling rig.

[0006] Preferably, the lifting assembly includes a drum, a wire rope, and a first pulley. The bottom of the power connection square head is fixedly connected to the drum, and the lower end of the drum is rotatably connected to the frame body. Guide wheel sets are symmetrically arranged on the frame body. The upper end of the fixing plate is provided with a first pulley. The wire rope is sleeved on the first pulley, and both ends of the wire rope pass through two sets of guide wheel sets and are fixedly connected to the drum. The fixing points at both ends of the wire rope are radially symmetrically arranged on the drum.

[0007] Preferably, a rotating disk is coaxially arranged at the bottom of the drum, the outer diameter of the rotating disk being larger than the outer diameter of the drum. A fixed disk is arranged on the upper surface of the frame body, and a circular groove adapted to the rotating disk is formed on the fixed disk. A locking ring is arranged around the drum, and the locking ring is connected to the fixed disk by a locking screw or a locking bolt.

[0008] Preferably, the frame body includes a frame plate and a frame housing, the frame housing is fixedly disposed on the lower part of the frame plate, and the frame housing has openings on the left and right sides; each guide wheel assembly includes a second pulley, a third pulley, and a fourth pulley, and the wire rope is sleeved on the second, third, and fourth pulleys; the second pulley is disposed on the upper part of the frame plate, the third pulley is disposed on the lower part of the frame plate, and the fourth pulley is disposed on the bottom plate inside the frame housing; the frame plate is symmetrically provided with a first through hole, and the bottom plate inside the frame housing is provided with a third through hole, the first and third through holes allowing the wire rope to pass through;

[0009] Alternatively, the frame body includes a frame plate, each guide wheel assembly includes a second pulley and a third pulley, and the wire rope is sleeved on the second and third pulleys; the second pulley is located on the upper part of the frame plate; the third pulley is located on the lower part of the frame plate; the frame plate is symmetrically provided with first through holes, which allow the wire rope to pass through.

[0010] Preferably, each of the guide wheel sets further includes a shaft support, which is disposed on the upper part of the frame plate. The second pulley is disposed on the side wall of the shaft support near the drum, so that the wire rope between the second pulley and the drum is in a horizontal state.

[0011] Preferably, a guide cylinder is provided on the fixed plate, and a guide rod is slidably disposed inside the guide cylinder. The end of the guide rod away from the guide cylinder is fixedly connected to the lower end of the frame body.

[0012] Preferably, the frame body includes a frame plate, the lifting assembly includes a sleeve and a screw, the inner circumferential side wall of the sleeve is provided with an internal thread adapted to the screw, the top of the sleeve passes through the frame plate and is fixedly connected to the power connection square head, and the sleeve is rotatably connected to the frame plate through a bearing; the end of the sleeve away from the power connection square head is connected to the screw, and the end of the screw away from the sleeve is fixed to a fixing plate.

[0013] Preferably, a rotating disk is coaxially arranged at the bottom of the power connection square head, the outer diameter of the rotating disk being larger than the diagonal length of the power connection square head, and the sleeve is fixedly arranged at the bottom of the rotating disk; a fixed disk is arranged on the upper surface of the frame body, the fixed disk having a circular groove adapted to the rotating disk, a locking disk is arranged on the upper part of the fixed disk, the locking disk having a circular stepped hole along its axial direction, the upper part of the circular stepped hole allowing the power connection square head to rotate inside it, the lower diameter of the circular stepped hole being adapted to the outer diameter of the rotating disk, a bearing is arranged at the lower part of the rotating disk and located in the circular groove, the sleeve is rotatably connected to the fixed disk through the bearing, and the locking disk is connected to the fixed disk through a locking screw or locking bolt.

[0014] Preferably, each bucket has two connecting arms symmetrically hinged together, and a connecting rod is provided between the two connecting arms on the same bucket; the two connecting arms located on the front side of the bucket are connected to the front side of the frame body through a first hinge shaft, and the two connecting arms located on the rear side of the bucket are connected to the rear side of the frame body through a second hinge shaft; each bucket has two connecting blocks symmetrically fixedly provided, and each connecting block is connected to the fixed plate through a third hinge shaft.

[0015] This application has the following beneficial effects:

[0016] This application utilizes a rotating mechanism located on the upper part of the main frame. The lifting assembly is connected to the lower end of the power connection square head. Buckets are symmetrically arranged on the lower part of the main frame, each with a hinged connecting arm. The other end of each connecting arm is hinged to the lower end of the main frame, and the connecting arms on the two buckets are symmetrically arranged. A fixed plate is located below the main frame, and both buckets are hinged to the fixed plate, which is connected to the lifting assembly. The rotation of the rotary drilling rig's drill rod drives the power connection square head to rotate, which in turn causes the lifting assembly to raise and lower the fixed plate, thus enabling the buckets to grab and release soil. Simultaneously, the drill rod of the rotary drilling rig rises and falls, driving the entire grab bucket device to rise and fall. This hole-cleaning method replaces manual hole cleaning, reducing the safety risks for operators and lowering the cost of safety measures. Furthermore, by connecting the power connection square head to the rotary drilling rig, the forward and reverse rotation of the rig's mechanical rotation drives the lifting assembly to extend or retract, thus opening and closing the buckets. When the two buckets are closed, the horizontal angle between them is larger, allowing for the excavation of more excavated soil and improving hole-cleaning efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the square pile grab bucket in Example 1 (the vertical plate on the front side of the frame box is removed in this figure to facilitate the display of the structure inside the frame box);

[0018] Figure 2 This represents the state where the distance between the fixed plate and the main body of the frame is at its maximum (to achieve the soil-releasing action) in Example 1;

[0019] Figure 3 This represents the state where the distance between the fixed plate and the main body of the frame is closest in Example 1 (to achieve the soil collection action);

[0020] Figure 4 This is a cross-sectional schematic diagram of the connection between the drum and the frame plate in Example 1;

[0021] Figure 5 This is a schematic diagram of the overall structure of the square pile grab bucket in Example 2;

[0022] Figure 6This represents the state where the distance between the fixed plate and the main body of the frame is at its maximum (to achieve the soil-releasing action) in Example 2;

[0023] Figure 7 This represents the state where the distance between the fixed plate and the main body of the frame is closest in Example 2 (to achieve the soil collection action);

[0024] Figure 8 This is a cross-sectional schematic diagram of the connection between the power connection square head and the frame plate in Example 2.

[0025] It should be noted that, Figure 5-8 The screw in the diagram does not show the thread.

[0026] In the diagram: 1. Power connection square head; 2. Drum; 3. Locking ring; 4. Rotating disc; 5. Fixed disc; 6. Connecting arm; 7. Third pulley; 8. Second pulley; 9. Connecting block; 10. Frame plate; 11. Rotating shaft support; 12. Connecting rod; 13. Frame housing; 14. Wire rope; 15. First through hole; 16. Third through hole; 17. First hinge shaft; 18. Fourth pulley; 19. Locking disc; 20. Sleeve; 21. First pulley; 22. Fixed plate; 23. Third hinge shaft; 24. Bucket; 25. Screw; 26. Guide cylinder; 27. Guide rod; 28. Bearing; 29. ​​Circular stepped hole. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0028] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 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.

[0029] This application discloses a square pile grab bucket, including a power connection square head 1, a frame body, buckets 24, and a lifting assembly. The power connection square head 1 is rotatably mounted on the upper part of the frame body, and the lifting assembly is connected to the lower end of the power connection square head 1. Buckets 24 are symmetrically arranged on the lower part of the frame body, and each bucket 24 is hinged with a connecting arm 6. The end of the connecting arm 6 away from the bucket 24 is hinged to the lower end of the frame body, and the connecting arms 6 on the two buckets 24 are symmetrically arranged. A fixing plate 22 is provided below the frame body, and the two buckets 24 are hinged to the fixing plate 22. The fixing plate 22 is connected to the lifting assembly. When the power connection square head 1 rotates, the lifting assembly drives the fixing plate 22 to rise or fall, realizing the grabbing or releasing of soil by the buckets 24. The power connection square head 1 is fixedly connected to the drill rod of a rotary drilling rig, and the drill rod of the rotary drilling rig drives the power connection square head 1 to rotate and realize the lifting and lowering of the entire square pile grab bucket.

[0030] In some preferred embodiments, the power source of the grab bucket of this application is a rotary drilling rig. Specifically, the drill rod of the rotary drilling rig is fixedly connected to the power connection square head 1. The rotation of the drill rod of the rotary drilling rig drives the power connection square head 1 to rotate. The power connection square head 1 causes the lifting assembly to raise and lower the fixed plate 22, realizing the action of the bucket 24 grabbing and releasing soil. At the same time, the drill rod of the rotary drilling rig will rise and fall, driving the entire grab bucket device to rise and fall. Of course, other forms of power sources can also be used. Any existing power source that can rotate the power connection square head 1 is within the protection scope of this application.

[0031] When the power connection square head 1 is fixedly connected to the rotary drilling rig drill rod, the rotary drilling rig drill rod rotates forward, driving the power connection square head 1 to rotate forward. The lifting component drives the fixed plate 22 to rise, and the two buckets 24 swing inward to realize the digging action. When the rotary drilling rig drill rod rotates in reverse, it drives the power connection square head 1 to rotate in reverse. The lifting component drives the fixed plate 22 to fall, and the two buckets 24 swing outward to realize the soil discharge action.

[0032] In a further embodiment, a wear-resistant and corrosion-resistant layer is provided on the outer wall of the bucket 24. The wear-resistant and corrosion-resistant layer adopts a wear-resistant and corrosion-resistant coating to extend the service life of the bucket 24 and improve its wear resistance and corrosion resistance.

[0033] In some preferred embodiments, two connecting arms 6 are symmetrically hinged to the outer wall of each bucket 24, and multiple connecting rods 12 are fixedly arranged between the two connecting arms 6 on the same bucket 24 to improve the mechanical strength of the two connecting arms 6; the two connecting arms 6 located on the front side of the bucket 24 (the two connecting arms 6 are located on different buckets 24) are connected to the front side wall of the frame housing 13 through the same first hinge shaft 17, or they can be connected to the front side wall of the frame housing 13 through different first hinge shafts 17; the two connecting arms 6 located on the rear side of the bucket 24 (the two connecting arms 6 are located on different buckets 24) are connected to the front side wall of the frame housing 13 through the same first hinge shaft 17. The buckets 24 are connected to the rear side wall of the frame housing 13 via the same second hinge shaft, or via different second hinge shafts. Two connecting blocks 9 are symmetrically fixed on the outer side wall of each bucket 24. The two connecting blocks 9 located on the front side of the bucket 24 (the two connecting blocks 9 are located on different buckets 24) are respectively hinged to the front side of the fixing plate 22 via the third hinge shaft 23. The two connecting blocks 9 located on the rear side of the bucket 24 (the two connecting blocks 9 are located on different buckets 24) are respectively hinged to the rear side of the fixing plate 22 via the third hinge shaft 23.

[0034] Example 1

[0035] like Figure 1-4 As shown, this embodiment discloses one specific implementation of the lifting assembly. The lifting assembly includes a drum 2, a wire rope 14, and a first pulley 21. The drum 2 is welded to the bottom of the power connection square head 1, and a rotating disk 4 is welded to the bottom of the drum 2. The axis of the rotating disk 4 is the same as the axis of the drum 2, and the outer diameter of the rotating disk 4 is larger than the outer diameter of the drum 2. A fixed disk 5 is fixedly installed on the upper surface of the frame body. A circular groove adapted to the rotating disk 4 is opened on the fixed disk 5, and the lower end of the rotating disk 4 can rotate within the circular groove. To reduce the rotational friction between the rotating disk 4 and the fixed disk 5, the rotating disk... The disc 4 and the fixed disc 5 are rotatably connected by bearings. A locking ring 3 is installed on the outer wall of the drum 2 near its bottom. The outer diameter of the drum 2 is matched with the inner diameter of the locking ring 3. Both the locking ring 3 and the fixed disc 5 are provided with multiple screw holes. The locking ring 3 is fixed to the fixed disc 5 by multiple locking screws. With the center of the locking ring 3 as the center point, multiple locking screws are arranged in a circumferential array on the locking ring 3. Through the cooperation between the fixed disc 5 and the locking ring 3, the rotating disc 4 can only rotate within the circular groove.

[0036] With the axis centerline of drum 2 as a reference, guide wheel sets are symmetrically installed on the main frame body. Buckets 24 are symmetrically installed on the lower part of the main frame body. The external structure of buckets 24 can be designed into various shapes as needed, such as square buckets, triangular buckets, etc. The openings of the two buckets 24 face downwards and are opposite to each other. A connecting arm 6 is hinged to the outer wall of each bucket 24. The connecting arms 6 on the two buckets 24 are symmetrically arranged. The end of each connecting arm 6 away from the bucket 24 is hinged to the main frame body through a hinge shaft. A fixing plate 22 is provided at the bottom of the main frame body. A connecting block 9 is fixedly installed on the outer wall of the bucket 24. The end of the connecting block 9 away from the bucket 24 is hinged to the fixed plate 22 through a hinge shaft. Two fixed supports are fixedly installed on the upper surface of the fixed plate 22. A connecting shaft is installed between the two fixed supports. A first pulley 21 is rotatably installed on the connecting shaft. A wire rope 14 is sleeved on the first pulley 21. The two ends of the wire rope 14 are fixedly connected to the outer circumferential side wall of the drum 2 after passing through two sets of guide wheel sets. The fixing points connecting the two ends of the wire rope 14 to the drum 2 are arranged radially symmetrically on the drum 2.

[0037] It should be noted that the function of the guide wheel assembly is to guide the direction of movement of the wire rope 14. Multiple pulleys can be arranged at different positions on the main frame to keep the wire rope 14 taut and guide it to move in the specified direction.

[0038] It should be noted that, in addition to the above-described embodiments, the rotating connection between the drum 2 and the frame body can be achieved by means of bearings, steel balls, empty sleeves, etc.

[0039] In some preferred embodiments, such as Figure 4 As shown, for ease of manufacturing, the rotating disc 4, fixed disc 5, and locking ring 3 all employ flange structures. Specifically, the rotating disc 4 uses a rotating flange, the fixed disc 5 uses a fixed flange, and the locking ring 3 uses a locking flange. A rotating flange is welded to the bottom of the drum 2, and a locking flange is loosely fitted on the outer ring of the drum 2 near its bottom. The inner diameter of the locking flange matches the outer diameter of the drum 2. The fixed flange is bolted to the upper surface of the frame body. The fixed flange and the locking flange are connected by bolts or screws. The rotating flange is positioned between the fixed flange and the locking flange, and a bearing is installed between the rotating flange and the fixed flange. By using the locking flange and the rotating flange, the drum 2 will not detach from the frame body during rotation. There are gaps between the rotating flange and the fixed flange / locking flange, and a bearing is installed between the rotating flange and the fixed flange to reduce the friction of the rotating flange and ensure the flexibility and stability of the drum 2's rotation.

[0040] In a further implementation, the guide wheel assembly can be implemented as follows: Figure 1 , 2As shown, the main frame includes a frame plate 10 and a frame housing 13. The frame housing 13 is fixedly installed on the lower surface of the frame plate 10, and the left and right sides of the frame housing 13 are designed to be open. A guide wheel assembly includes a second pulley 8, a third pulley 7, and a fourth pulley 18. The second pulley 8 is installed on the upper surface of the frame plate 10 through a fixed support and a connecting shaft. The third pulley 7 is installed on the lower surface of the frame plate 10 through a fixed support and a connecting shaft. The fourth pulley 18 is installed on the inner bottom plate of the frame housing 13 through a fixed support and a connecting shaft. The second, third, and fourth pulleys 18 are installed using a fixed support and a connecting shaft. This is a conventional technical method in the field and will not be described in detail here; A first through hole 15 is provided on the frame plate 10 and near the second pulley 8. The first through hole 15 is used to guide the wire rope 14 guided out of the second pulley 8 through the frame plate 10 and to the third pulley 7. The wire rope 14 guided out of the third pulley 7 is guided to the fourth pulley 18 through the opening of the frame housing 13. A third through hole 16 is provided on the bottom plate of the frame housing 13 and near the fourth pulley 18. The third through hole 16 is used to guide the wire rope 14 guided out of the fourth pulley 18 through the bottom plate of the frame housing 13 and to the first pulley 21.

[0041] One end of the wire rope 14 is fixed to the circumferential side wall of the drum 2. The other end of the wire rope 14 passes sequentially through the second pulley 8, the first through hole 15, the third pulley 7, the fourth pulley 18, and the third through hole 16 on the left side, then through the first pulley 21, and then sequentially through the third through hole 16, the fourth pulley 18, the third pulley 7, the first through hole 15, and the second pulley 8 on the right side, before finally being fixed to the circumferential side wall of the drum 2. In a preferred embodiment, the arrangement path of the wire rope 14 is approximately on the same plane, with slight deviations allowed.

[0042] In a further embodiment, the guide wheel assembly can also be implemented as follows: the frame body includes a frame plate 10, and a guide wheel assembly includes a second pulley 8 and a third pulley 7. The second pulley 8 is mounted on the upper surface of the frame plate 10 through a fixed support and a connecting shaft, and the third pulley 7 is mounted on the lower surface of the frame plate 10 through a fixed support and a connecting shaft. The method of mounting the second and third pulleys 7 through a fixed support and a connecting shaft is a conventional technical means in the art and will not be described in detail here. A first through hole 15 is provided on the frame plate 10 and near the second pulley 8. The first through hole 15 is used to guide the steel wire rope 14 guided out from the second pulley 8 through the frame plate 10 and guide it to the third pulley 7.

[0043] One end of the wire rope 14 is fixed to the circumferential side wall of the drum 2. The other end of the wire rope 14 passes sequentially through the second pulley 8, the first through hole 15, and the third pulley 7 on the left side, then through the first pulley 21, and then sequentially through the third pulley 7, the first through hole 15, and the second pulley 8 on the right side, before finally being fixed to the circumferential side wall of the drum 2. In a preferred embodiment, the arrangement path of the wire rope 14 is approximately on the same plane, with slight deviations allowed.

[0044] In some preferred embodiments, each guide wheel assembly further includes a shaft support 11, which is disposed on the upper surface of the frame plate 10. Two fixed supports are installed on the side wall of the shaft support 11 near the drum 2. A connecting shaft is installed between the two fixed supports, and a second pulley 8 is installed on the connecting shaft. The specific installation position of the second pulley 8 on the shaft support 11 is such that the wire rope 14 between the second pulley 8 and the drum 2 is in a horizontal state.

[0045] In some preferred embodiments, two connecting arms 6 are symmetrically hinged to the outer wall of each bucket 24, and multiple connecting rods 12 are fixedly arranged between the two connecting arms 6 on the same bucket 24 to improve the mechanical strength of the two connecting arms 6; the two connecting arms 6 located on the front side of the bucket 24 are connected to the front wall of the frame housing 13 through the same first hinge shaft 17; the two connecting arms 6 located on the rear side of the bucket 24 are connected to the rear wall of the frame housing 13 through the same second hinge shaft; two connecting blocks 9 are symmetrically fixedly installed on the outer wall of each bucket 24, the two connecting blocks 9 located on the front side of the bucket 24 are respectively hinged to the front side of the fixing plate 22 through the third hinge shaft 23, and the two connecting blocks 9 located on the rear side of the bucket 24 are respectively hinged to the rear side of the fixing plate 22 through the third hinge shaft 23.

[0046] In a further embodiment, two guide cylinders 26 are fixedly installed on the fixed plate 22 in the vertical direction. The axis of the guide cylinders 26 is parallel to the axis of the drum 2. Guide rods 27 are slidably arranged inside the two guide cylinders 26. One end of the two guide rods 27 is fixedly installed on the lower surface of the frame housing 13, and the other end slides up and down in the cavity of the guide cylinder 26. The sliding direction of the two guide rods 27 is parallel to the axis of the drum 2, so that the two buckets 24 do not deviate to the side during the up and down movement, and ensure that the center of gravity of the square pile grab bucket is always on the central axis of the rotary drilling rig.

[0047] The working principle of this embodiment 1 is as follows: When removing slag, the rotary drilling rig's drill rod first drives the power connection square head 1 to rotate. Since the lower end of the power connection square head 1 is fixedly connected to the drum 2, the power connection square head 1 drives the drum 2 to rotate. The rotation of the drum 2 causes the wire rope 14 to wind around the drum 2. Under the guidance of the guide wheel group, the wire rope 14 drives the fixed plate 22 to move upward. The distance between the fixed plate 22 and the bottom of the frame body gradually decreases. Since the outer wall of the bucket 24 is hinged to the fixed plate 22 through the connecting block 9 and to the frame body through the connecting arm 6, the two buckets 24 swing inward to realize the digging action. Figure 3 As shown; when the power source drives the power connection square head 1 to rotate in the opposite direction, the power connection square head 1 drives the drum 2 to rotate in the opposite direction. The rotation of the drum 2 releases the wire rope 14 on the drum 2. Under its own weight, the distance between the fixed plate 22 and the bottom of the frame body gradually increases, thereby causing the two buckets 24 to swing outward, realizing the soil discharge action, as shown. Figure 2 As shown.

[0048] Example 2

[0049] like Figure 5-8 As shown, this embodiment discloses another specific implementation of the lifting assembly. The frame body includes a frame plate 10, and the lifting assembly includes a sleeve 20 and a screw 25 arranged in a vertical direction. The sleeve 20 is adapted to the screw 25, and an internal thread adapted to the external thread of the screw 25 is provided on the inner circumferential side wall of the sleeve 20. A rotating disk 4 is welded to the lower end of the power connection square head 1. The center line of the power connection square head 1 and the axis of the rotating disk 5 are located on the same straight line. The outer diameter of the rotating disk 5 is greater than the maximum diagonal length of the power connection square head 1. The top of the sleeve 20 passes through the frame plate 10 and is fixedly connected to the lower surface of the rotating disk 4. The end of the sleeve 20 away from the rotating disk 4 is connected to the screw 25, and the end of the screw 25 away from the sleeve 20 is fixedly connected to the fixing plate 22.

[0050] A fixed disc 5 is welded to the upper surface of the frame plate 10. The fixed disc 5 has a circular groove that matches the rotating disc 4, allowing the lower end of the rotating disc 4 to rotate within the circular groove. A locking disc 19 is provided on the upper part of the fixed disc 5. The locking disc 19 has a circular stepped hole 29 along its axial direction. The upper part of the circular stepped hole 29 allows the power connection square head 1 to rotate inside without interference. That is, the diameter of the upper circular hole of the circular stepped hole 29 is slightly larger than the maximum diagonal length of the outer side of the power connection square head 1. The diameter of the lower circular hole of the circular stepped hole 29 is slightly larger than the outer diameter of the rotating disc 4, allowing the upper part of the rotating disc 4 to rotate within the lower circular hole of the circular stepped hole 29. The fixed disc 5 and the locking disc 19 are fixedly connected by locking bolts or locking screws. By providing the circular stepped hole 29, the rotating disc 4 can be prevented from sliding out of the locking disc 19 and the fixed disc 5 during rotation, thereby realizing the rotational connection between the power connection square head 1 and the frame plate 10.

[0051] To reduce the friction between the sleeve 20 and the fixed disk 5, a suitable bearing is installed in the circular groove. The sleeve 20 is located inside the bearing, meaning that the sleeve 20 is rotatably connected to the fixed disk 5 through the bearing. The rotating disk 4 is mounted on the upper part of the bearing. To reduce the friction between the sleeve 20 and the frame plate 10, a bearing is also fitted around the sleeve 20, and the sleeve 20 is rotatably connected to the frame plate 10 through the bearing.

[0052] It should be noted that the axis of the circular groove, the axis of the circular stepped hole 29, the axis of the rotating disk 4, and the center line of the power connection square head 1 are all on the same straight line.

[0053] The working principle of this embodiment 2 is as follows: When removing slag, the rotary drilling rig's drill rod first drives the power connection square head 1 to rotate in the forward direction. Since the lower end of the power connection square head 1 is fixedly connected to the rotating disk 4, the power connection square head 1 drives the rotating disk 4 to rotate. The rotation of the rotating disk 4 drives the sleeve 20 to rotate. Since the lower end of the screw 25 is fixed to the fixed plate 22, the sleeve 20 rotates on the screw 25, causing the screw 25 to continuously screw into the sleeve 20. The distance between the fixed plate 22 and the bottom of the frame body gradually decreases. Since the outer wall of the bucket 24 is hinged to the fixed plate 22 through the connecting block 9 and to the frame body through the connecting arm 6, the two buckets 24 swing inward to achieve the digging action. Figure 7 As shown; when the power connection square head 1 of the rotary drilling rig's drill rod drives the rotating disk 4 to rotate in the opposite direction, the sleeve 20 rotates on the screw 25, causing the screw 25 to continuously rotate out of the sleeve 20. The distance between the fixed plate 22 and the bottom of the frame body gradually increases, causing the two buckets 24 to swing outward, realizing the soil discharge action, as shown. Figure 6 As shown.

[0054] In addition to the implementation methods of Examples 1 and 2, the lifting assembly can also be other existing structures that can achieve the lifting of the fixed plate 22 by rotating the power connection square head 1, and these are all within the protection scope of this patent.

[0055] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A square pile grab characterised in that: The machine includes a power connection head (1), a frame body, buckets (24), and a lifting assembly. The power connection head (1) is rotatably mounted on the upper part of the frame body, and the lifting assembly is connected to the lower end of the power connection head (1). The buckets (24) are symmetrically arranged on the lower part of the frame body. Each bucket (24) is hinged with a connecting arm (6). The end of the connecting arm (6) away from the bucket (24) is hinged to the lower end of the frame body, and the connecting arms (6) on the two buckets (24) are symmetrically arranged. A fixing plate (22) is provided below the frame body. The two buckets (24) are hinged to the fixing plate (22), and the fixing plate (22) is connected to the lifting assembly. The power connection square head (1) rotates, and the lifting component drives the fixed plate (22) to rise / fall, so that the bucket (24) can grab / release soil.

2. A square pile grab according to claim 1, characterised in that: The power connection square head (1) is fixedly connected to the drill rod of the rotary drilling rig.

3. A grab according to claim 2, characterised in that: The lifting assembly includes a drum, a wire rope, and a first pulley. The bottom of the power connection square head (1) is fixedly connected to the drum (2). The lower end of the drum (2) is rotatably connected to the frame body. Guide wheel sets are symmetrically arranged on the frame body. The upper end of the fixing plate (22) is provided with a first pulley (21). The wire rope (14) is sleeved on the first pulley (21). The two ends of the wire rope (14) pass through two sets of guide wheel sets and are fixedly connected to the drum (2). The fixing points at both ends of the wire rope (14) are radially symmetrically arranged on the drum (2).

4. A grab according to claim 3, wherein: A rotating disk (4) is coaxially arranged at the bottom of the drum (2). The outer diameter of the rotating disk (4) is larger than the outer diameter of the drum (2). A fixed disk (5) is arranged on the upper surface of the frame body. A circular groove adapted to the rotating disk (4) is opened on the fixed disk (5). A locking ring (3) is arranged around the drum (2). The locking ring (3) is connected to the fixed disk (5) by locking screws or locking bolts.

5. A grab according to claim 3, wherein: The main body of the frame includes a frame plate (10) and a frame housing (13). The frame housing (13) is fixedly installed on the lower part of the frame plate (10), and the frame housing (13) has openings on the left and right sides. Each guide wheel assembly includes a second pulley (8), a third pulley (7), and a fourth pulley (18). The wire rope (14) is sleeved on the second, third, and fourth pulleys (8, 7, 18). The second pulley (8) is located on the upper part of the frame plate (10), the third pulley (7) is located on the lower part of the frame plate (10), and the fourth pulley (18) is located on the inner bottom plate of the frame housing (13). The frame plate (10) is symmetrically provided with a first through hole (15), and the inner bottom plate of the frame housing is provided with a third through hole (16). The first and third through holes (15, 16) allow the wire rope (14) to pass through. Alternatively, the main body of the frame includes a frame plate (10), each guide wheel assembly includes a second pulley (8) and a third pulley (7), and the wire rope (14) is sleeved on the second and third pulleys (8, 7); the second pulley (8) is located on the upper part of the frame plate (10); the third pulley (7) is located on the lower part of the frame plate (10); the frame plate (10) is symmetrically provided with first through holes (15), which allow the wire rope (14) to pass through.

6. A grab according to claim 5, wherein: Each of the guide wheel sets also includes a shaft support (11), which is located on the upper part of the frame plate (10). The second pulley (8) is provided on the side wall of the shaft support (11) near the drum (2), so that the wire rope (14) between the second pulley (8) and the drum (2) is in a horizontal state.

7. A grab according to claim 6, characterised in that: A guide cylinder (26) is provided on the fixed plate (22), and a guide rod (27) is slidably provided inside the guide cylinder (26). The end of the guide rod (27) away from the guide cylinder (26) is fixedly connected to the lower end of the frame body.

8. A grab according to claim 2, characterised in that: The main body of the frame includes a frame plate (10), and the lifting assembly includes a sleeve (20) and a screw (25). The inner circumferential side wall of the sleeve (20) is provided with an internal thread that is compatible with the screw (25). The top of the sleeve (20) passes through the frame plate (10) and is fixedly connected to the power connection square head (1). The sleeve (20) is rotatably connected to the frame plate (10) through a bearing. The end of the sleeve (20) away from the power connection square head (1) is connected to the screw (25), and the end of the screw (25) away from the sleeve (20) is fixed to the fixing plate (22).

9. A square pile grab bucket according to claim 8, characterized in that: A rotating disk (4) is coaxially arranged at the bottom of the power connection square head (1). The outer diameter of the rotating disk (4) is larger than the diagonal length of the power connection square head (1). The sleeve (20) is fixedly arranged at the bottom of the rotating disk (4). A fixed disk (5) is arranged on the upper surface of the frame body. A circular groove adapted to the rotating disk (4) is opened on the fixed disk (5). A locking disk (19) is arranged on the upper part of the fixed disk (5). 19) A circular stepped hole (29) is provided along its axial direction. The upper part of the circular stepped hole (29) allows the power connection square head (1) to rotate inside it. The lower diameter of the circular stepped hole (29) is adapted to the outer diameter of the rotating disk (4). A bearing is provided at the lower part of the rotating disk (4) and located in the circular groove. The sleeve (20) is rotatably connected to the fixed disk (5) through the bearing. The locking disk (19) is connected to the fixed disk (5) through locking screws or locking bolts.

10. A square pile grab according to claim 1, characterized in that: Each bucket (24) has two connecting arms (6) symmetrically hinged on it, and a connecting rod (12) is provided between the two connecting arms (6) on the same bucket (24); the two connecting arms (6) located on the front side of the bucket (24) are connected to the front side of the frame body through the first hinge shaft (17), and the two connecting arms (6) located on the rear side of the bucket (24) are connected to the rear side of the frame body through the second hinge shaft; each bucket (24) has two connecting blocks (9) symmetrically fixed on it, and each connecting block (9) is connected to the fixing plate (22) through the third hinge shaft (23).

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