Manual-automatic dual-purpose sand fishing drilling bucket unlocking device and sand fishing drilling bucket

Abstract

The utility model relates to the technical field of rotary drilling rigs, in particular to a manual-automatic dual-purpose sand fishing drilling bucket unlocking device and a sand fishing drilling bucket. The unlocking device comprises a pressing rod mechanism, a pushing rod mechanism, a transmission mechanism and an unlocking mechanism. The unlocking mechanism comprises a manual push rod penetrating through the drilling bucket top plate, the top end of the manual push rod is provided with an operation end, the bottom end of the manual push rod is provided with a clamping block, the manual push rod is selectively matched with a clamping assembly of the drilling bucket bottom plate, and the manual push rod is sleeved with a rotating ring in linkage with the push rod mechanism. When external force is applied to the pressing rod mechanism, the pressing rod mechanism drives the push rod mechanism to transversely slide through the transmission mechanism, the push rod mechanism drives the rotating ring to rotate, the manual push rod rotates around the axis of the manual push rod, and the clamping block is driven to be separated from the clamping assembly. The device integrates an automatic mode and a manual mode, the compatibility and the unlocking reliability of the device are effectively improved, the anti-vibration stability is enhanced, and the problems that a traditional device is insufficient in unlocking force and lack of an emergency mechanism are solved.

Description

Technical Field

[0001] This utility model belongs to the field of rotary drilling rig technology, specifically a manual / automatic sand-scooping bucket unlocking device and a sand-scooping bucket. Background Technology

[0002] During rotary drilling rig construction, the sand-retrieving bucket, as a core component for removing cuttings, directly impacts the efficiency of cuttings unloading and construction safety due to the reliability of its bottom plate locking mechanism. Traditional sand-retrieving buckets generally employ a lever-type automatic unlocking structure, the specific structure of which is as follows: Figure 1 As shown: It includes a pressure rod (11) vertically installed on the main body of the drill bucket. The bottom end of the pressure rod (11) is hinged to the bottom plate hook (7) through a pin. The top end is pre-tightened by a helical spring (16) to form an elastic reset component, so that the bottom plate hook (7) and the hook ring (8) on the bottom plate of the drill bucket are kept locked. When unloading the slag, the annular pressure plate at the lower end of the rotary drilling rig power head presses down on the top end of the pressure rod (11), forcing the pressure rod (11) to move downward against the spring force, driving the bottom plate hook (7) to rotate around the pin and disengage from the hook ring (8), thereby unlocking the bottom plate of the drill bucket. The drill slag pushes open the bottom plate of the drill bucket by its own weight to complete the unloading.

[0003] However, the existing sand-dredging drill bucket structure has the following defects: First, poor device compatibility: Since the sand-dredging drill bucket and the rotary drilling rig are from different manufacturers, the diameter and stroke of the pressure plate at the lower end of the power head may not match the installation position parameters of the drill bucket pressure rod, resulting in insufficient downward stroke of the pressure plate or failure to contact the top of the pressure rod, causing the unlocking function to completely fail; Second, unreliable unlocking force transmission: If a small-sized annular pressure plate is used, its contact area with the top of the pressure rod is too small, and contact misalignment is likely to occur when the drill bucket is tilted or the pressure rod is slightly offset, which cannot provide sufficient axial unlocking force; Third, lack of emergency unlocking mechanism: When automatic unlocking fails, the existing technology lacks a manual emergency unlocking interface, and can only manually disassemble the hinge pin or forcibly unload the slag through destructive operation, which is time-consuming and prone to causing safety accidents such as the bottom plate accidentally popping open and drill slag splashing.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a manual / automatic sand-dredging bucket unlocking device, which has the advantages of improving device compatibility, enhancing the reliability of unlocking force transmission, and providing an emergency unlocking mechanism.

[0006] This utility model adopts the following technical solution: a manual / automatic sand-dredging bucket unlocking device, comprising:

[0007] The pressure bar mechanism is fixed vertically to the upper surface of the drill bit top plate;

[0008] The push rod mechanism is horizontally and laterally slidably mounted on the upper surface of the drill bucket top plate;

[0009] The transmission mechanism is connected at one end to the pressure rod mechanism and at the other end to one end of the push rod mechanism, converting the vertical movement of the pressure rod mechanism into the lateral sliding of the push rod mechanism. The unlocking mechanism includes a manual push rod and a rotating ring. The manual push rod is set vertically through the top plate of the drill bucket, with its top end extending above the upper surface of the top plate and its bottom end extending downward to the top of the bottom plate. The rotating ring is sleeved and fixed on the outer circumference of the manual push rod and is located on the rod body on the upper surface of the top plate of the drill bucket. The rotating ring is connected to the other end of the push rod mechanism. The bottom end of the manual push rod is provided with a locking block, which selectively engages with a locking assembly fixed on the bottom plate of the drill bucket.

[0010] When an external force is applied to the pressure rod mechanism, the pressure rod mechanism drives the push rod mechanism to slide laterally through the transmission mechanism. The push rod mechanism drives the rotating ring to rotate, causing the manual push rod to rotate around its axis, thus driving the locking block to disengage from the locking assembly.

[0011] Furthermore, the transmission mechanism includes a first transmission component and a second transmission component that slide and cooperate with each other. The first transmission component is fixedly connected to the pressure rod mechanism, and the second transmission component is fixedly connected to one end of the push rod mechanism. The first transmission component is provided with a first inclined contact surface, and the second transmission component is provided with a second inclined contact surface that slides and cooperates with the first inclined contact surface.

[0012] Furthermore, the pressure rod mechanism includes a pressure rod and a limiting plate. The limiting plate is fixedly connected to the drill bucket connection, and the top end of the pressure rod passes through the limiting plate and is provided with a first limiting member. The first transmission member is located on the lower end side wall of the pressure rod. The top plate of the drill bucket is provided with a through guide hole for the pressure rod and the first transmission member to slide vertically. When an external force is applied to the upper end of the pressure rod, the first transmission member moves downward and abuts against the second inclined surface through the first inclined contact surface, thereby driving the push rod mechanism to slide laterally until the first limiting member abuts against the upper surface of the limiting plate.

[0013] Furthermore, the pressure rod mechanism also includes a second limiting member sleeved on the pressure rod and a guide cylinder installed vertically in the through guide hole. The side wall of the guide cylinder is provided with a limiting cut that is compatible with the first transmission member. The second limiting member is located below the limiting plate. A helical spring is provided between the second limiting member and the guide cylinder. The two ends of the helical spring abut against the lower surface of the second limiting member and the top end of the guide cylinder, respectively.

[0014] Furthermore, the push rod mechanism includes a push rod body, one end of which is provided with a hinge shaft. The push rod body is hinged to the rotating ring through the hinge shaft, and the other end of the push rod body is fixedly connected to the second transmission component.

[0015] Furthermore, the push rod mechanism also includes a lateral limiting block fixedly installed on the top plate of the drill bucket. The lateral limiting blocks are symmetrically arranged on both sides of the second transmission member, so that the second transmission member slides along the direction defined by the lateral limiting blocks.

[0016] Furthermore, the snap-fit ​​assembly includes a snap-fit ​​seat fixedly installed on the upper surface of the drill bit base plate. The snap-fit ​​seat has a snap-fit ​​hole that matches the snap-fit ​​block. After the snap-fit ​​block passes through the snap-fit ​​hole, it rotates 90° and snaps into the snap-fit ​​seat.

[0017] Furthermore, it also includes an elastic reset mechanism, which includes a mounting base and a reset spring. The mounting base is fixed on the upper surface of the drill bit top plate, and one end of the reset spring is connected to the mounting base, while the other end is connected to the outer circumferential surface of the rotating ring. When the external force is removed, the reset spring pulls the rotating ring to drive the manual push rod to rotate in the opposite direction and reset.

[0018] Furthermore, the unlocking mechanism also includes a push rod handle fixed to the top of the manual push rod.

[0019] This utility model also provides a sand dredging bucket, including any one of the above-mentioned manual and automatic sand dredging bucket unlocking devices.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] (1) This utility model achieves the automatic unlocking function of the drill bucket bottom plate through the linkage of the pressure rod mechanism, the transmission mechanism and the push rod mechanism. At the same time, it innovatively sets up an independent manual push rod as an emergency unlocking channel. When the automatic unlocking fails, the operator can directly drive the locking block to disengage by manually rotating the manual push rod. This design establishes a dual guarantee mechanism of automatic unlocking and manual emergency unlocking, which not only overcomes the problem of traditional drill bucket unlocking devices lacking backup unlocking methods, but also significantly improves the compatibility of the device with different working conditions and the safety of the operation process through the safety interlock design.

[0022] (2) This utility model achieves precise vector conversion from vertical motion of the pressure rod to horizontal sliding of the push rod through the wedge-shaped contact effect of the two inclined contact surfaces in the transmission mechanism. At the same time, it combines the rigid sleeve structure of the rotating ring and the manual push rod to form a lever-type force transmission path, which greatly enhances the stability and efficiency of unlocking force transmission.

[0023] (3) This utility model achieves lateral mechanical limiting and sliding guidance of the pressure rod through the limiting plate in the pressure rod mechanism, the through guide hole on the bottom plate of the drill bucket, and the guide cylinder set on the through guide hole, so as to prevent the pressure rod from being radially offset due to the impact of asymmetric load or high frequency vibration on the drill bucket, reduce the risk of contact failure between the pressure plate and the pressure rod, and improve the stability and safety of the device operation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a partial structural diagram of an existing sand-dredging drill bucket;

[0026] Figure 2 This is a three-dimensional structural diagram of the manual / automatic sand-dredging bucket unlocking device of this utility model;

[0027] Figure 3 This is an exploded structural diagram of the manual / automatic sand-dredging bucket unlocking device of this utility model;

[0028] Figure 4 In this utility model Figure 3 Enlarged view of a portion of point A in the middle;

[0029] Figure 5 This is a three-dimensional structural diagram of the sand-dredging drill bucket of this utility model;

[0030] Figure 6 This is a schematic diagram of the sand-dredging bucket part of this utility model;

[0031] Figure 7 This is a top view of the top plate of the drill bucket in this utility model;

[0032] The components are: 1-Pressure rod mechanism, 11-Pressure rod, 12-Limiting plate, 13-First limiting component, 14-Second limiting component, 15-Guide cylinder, 150-Limiting notch, 16-Helical spring, 2-Sand dredging bucket, 21-Drill bucket top plate, 210-Through guide hole, 22-Drill bucket bottom plate, 23-Drill bucket connecting square, 3-Push rod mechanism, 31-Push rod body, 32-Hinge shaft, 33-Transverse limiting block, 4-Transmission mechanism, 41-First transmission component, 42-Second transmission component, 410-First inclined contact surface, 420-Second inclined contact surface, 5-Unlocking mechanism, 51-Manual push rod, 52-Rotating ring, 53-Snap-fit ​​block, 54-Snap-fit ​​assembly. 540-Snap-in base, 541-Snap-in hole, 55-Push rod handle, 6-Elastic reset mechanism, 61-Mounting base, 62-Reset spring, 7-Base plate hook, 8-Hook ring. Detailed Implementation

[0033] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] The following is combined Figures 2 to 7 The present invention will be described in detail with reference to specific embodiments.

[0035] This utility model provides a manual / automatic sand-dredging bucket unlocking device, including a pressure rod mechanism 1, which is fixed vertically to the upper surface of the bucket top plate 21; a push rod mechanism 3, which is horizontally slidably installed on the upper surface of the bucket top plate 21; a transmission mechanism 4, one end of which is connected to the pressure rod mechanism 1 and the other end of which is connected to one end of the push rod mechanism 3, converting the vertical movement of the pressure rod mechanism 1 into the horizontal sliding of the push rod mechanism 3; and an unlocking mechanism 5, including a manual push rod 51 and a rotating ring 52. The manual push rod 51 is set vertically through the bucket top plate 21, with its top end extending above the upper surface of the bucket top plate 21 and its bottom end extending downward to the upper surface of the bucket bottom plate 22. The rotating ring 52 is sleeved and fixed on the outer circumference of the manual push rod 51 and is located on the rod body on the upper surface of the bucket top plate 21. The rotating ring 52 is connected to the other end of the push rod mechanism 3. The bottom end of the manual push rod 51 is provided with a locking block 53, which selectively engages with a locking assembly 54 fixed on the bucket bottom plate 22.

[0036] When the pressure plate at the lower end of the rotary drilling rig's power head applies an external force to the pressure rod mechanism 1, the pressure rod mechanism 1 drives the push rod mechanism 3 to slide laterally through the transmission mechanism 4. The push rod mechanism 3 drives the rotating ring 52 to rotate, causing the manual push rod 51 to rotate around its axis, driving the locking block 53 to disengage from the locking assembly 54.

[0037] In this invention, the pressure rod mechanism 1 is an actuating component that receives external vertical pressure. This mechanism transmits the external force to the transmission mechanism 4, forming an automatic unlocking driving force. The push rod mechanism 3 is a transmission component that slides laterally. Specifically, it can adopt a rod-shaped structure with a hinge shaft. Its lateral movement drives the rotating ring 52 to rotate through the hinge shaft. The hinge design of the rotating ring 52 improves the system's resistance to vibration interference. The transmission mechanism 4 is a motion conversion device that realizes three-level motion transmission of vertical-lateral-rotation. The unlocking mechanism 5 refers to a rotating actuating component that includes a manual operation end. It is compatible with both automatic drive and manual rotation operation, forming a dual unlocking path and solving the problem of the lack of emergency mechanism in traditional devices.

[0038] In actual use, when external pressure is applied to the pressure rod mechanism 1 (i.e., when the annular pressure plate at the lower end of the rotary drilling rig's power head presses down on the pressure rod mechanism 1), the pressure rod mechanism 1 moves vertically, pushing the push rod mechanism 3 to slide laterally through the transmission mechanism 4. The lateral movement of the push rod mechanism 3 is transmitted to the rotating ring 52, driving the manual push rod 51 to rotate around its axis. The locking block 53 at the bottom of the manual push rod 51 rotates accordingly, and the drill bucket bottom plate 22, under its own weight and the weight of the drill cuttings, disengages from the locking assembly 54, completing the cuttings unloading operation. When the above automatic unlocking fails, the operator can directly drive the locking block 53 to rotate and unlock by rotating the operating end of the manual push rod 51, avoiding the associated risks caused by disassembly operations.

[0039] Through the above technical solution, this application effectively solves the compatibility problem caused by the disparity in design parameters between different manufacturers. The automatic unlocking mode is compatible with the contact conditions of pressure plates of different sizes. At the same time, the independent manual push rod realizes the emergency unlocking function, forming a drill bit unlocking device with both automatic and manual modes.

[0040] For details, please refer to Figures 2 to 4 In this embodiment, the transmission mechanism 4 includes a first transmission component 41 and a second transmission component 42 that slide against each other. The first transmission component 41 is fixedly connected to the pressure rod mechanism 1, and the second transmission component 42 is fixedly connected to one end of the push rod mechanism 3. The first transmission component 41 has a first inclined contact surface 410, and the second transmission component 42 has a second inclined contact surface 420 that slides against the first inclined contact surface 410. The first transmission component 41 is a sliding component rigidly connected to the pressure rod mechanism 1, and its first inclined contact surface 410 forms a motion direction conversion reference surface at a preset angle. The second transmission component 42 is a sliding component rigidly connected to the push rod mechanism 3, which can be implemented using a guide block with a matching inclined surface. Its second inclined contact surface 420 abuts against the first inclined contact surface 410, transmitting the lateral force through surface contact. The matching inclined surface angle of the two inclined contact surfaces is calculated to ensure a linear conversion from vertical to lateral motion. Because surface contact is used instead of point contact or hinged structure, the increased contact area reduces the pressure per unit area, effectively avoiding wear caused by local stress concentration. At the same time, it can also ensure that the transmission mechanism 4 can maintain a stable contact state under vibration conditions, and avoid power transmission interruption during the unlocking process.

[0041] For details, please refer to Figures 2 to 3 , Figure 7In this embodiment, the pressure rod mechanism 1 includes a pressure rod 11 and a limiting plate 12. The limiting plate 12 is fixedly connected to the drill bucket connecting side 23, and the top end of the pressure rod 11 passes through the limiting plate 12 and is provided with a first limiting member 13. The first transmission member 41 is located on the lower end side wall of the pressure rod 11. The top plate 21 of the drill bucket is provided with a through guide hole 210 for the pressure rod 11 and the first transmission member 41 to slide vertically. When an external force is applied to the upper end of the pressure rod 11, the first transmission member 41 moves downward and abuts against the second inclined surface 420 through the first inclined contact surface 410, thereby driving the push rod mechanism 3 to slide laterally until the first limiting member 13 abuts against the upper surface of the limiting plate 12.

[0042] The limiting plate 12 is a plate-shaped structure rigidly connected to the drill bit connecting plate 23. Specifically, it can be a 15 mm thick steel plate welded and fixed to the drill bit connecting plate 23, providing a reference plane for the vertical movement of the pressure rod 11. The first limiting member 13 is a limiting ring set at the top of the pressure rod 11. Specifically, it can be a steel retaining ring welded to the top of the pressure rod 11, with an outer diameter larger than the diameter of the through hole in the limiting plate 12, thus forming a mechanical limit. The through guide hole 210 refers to a rectangular-circular composite through hole structure opened on the top plate 21 of the drill bit. Its inner wall forms a sliding guide structure with clearance fit between the side of the first transmission member 41 and the pressure rod 11. The first transmission member 41 is a rectangular block with chamfered corners set on the lower side wall of the pressure rod 11. The first inclined contact surface 410 is located at the lower left corner of the rectangular block. Specifically, it can be a steel slider with a 45-degree incline to the axis of the pressure rod.

[0043] Specifically, when external pressure is applied to the top of the pressure rod 11, the pressure rod 11 moves vertically downward along the through guide hole 210. At this time, the first inclined contact surface 410 of the first transmission member 41 and the second inclined contact surface 420 of the second transmission member 42 make sliding contact, converting the vertical movement of the pressure rod 11 into lateral thrust. During this process, the inner wall of the through guide hole 210 forms a lateral constraint on the first transmission member 41 and the pressure rod 11, preventing radial displacement of the pressure rod 11 due to vibration. When the pressure rod 11 moves to the point where the first limiting member 13 contacts the limiting plate 12, the downward stroke of the pressure rod 11 is forcibly terminated. At this time, the first transmission member 41 reaches the preset drive termination position, ensuring that the push rod mechanism 3 obtains a precise lateral displacement. This structure achieves precise control of the movement trajectory of the pressure rod 11 through the dual action of mechanical limiting and sliding guidance.

[0044] For details, please refer to Figures 2 to 3 , Figure 7In this embodiment, the pressure rod mechanism 1 further includes a second limiting member 14 sleeved on the pressure rod 11 and a guide cylinder 15 installed vertically in the through guide hole 210. The side wall of the guide cylinder 15 is provided with a limiting cut 150 adapted to the first transmission member 41. The second limiting member 14 is located below the limiting plate 12. A helical spring 16 is provided between the second limiting member 14 and the guide cylinder 15. The two ends of the helical spring 16 abut against the lower surface of the second limiting member 14 and the top end of the guide cylinder 15, respectively.

[0045] The second limiting member 14 refers to the annular retaining ring installed on the pressure rod 11, which can be implemented as a nut with internal threads, forming an axial fixation with the pressure rod 11 through a threaded connection. The guide cylinder 15 refers to the tubular component embedded in the through guide hole 210 of the drill bit top plate 21, which can be a steel cylinder with a longitudinal guide groove, and its inner diameter forms a clearance fit with the outer diameter of the pressure rod 11. The limiting notch 150 refers to the irregular opening opened upward at the bottom of the side wall of the guide cylinder 15, which can be designed as a rectangular notch matching the cross-sectional shape of the first transmission member 41, allowing the first transmission member 41 to be embedded in the notch when sliding in the vertical direction. The limiting notch 150 forms a mechanical constraint on the lateral movement of the first transmission member 41, preventing the pressure rod 11 from radially deviating when subjected to vibration loads; the helical spring 16 refers to the elastic element installed between the second limiting member 42 and the top of the guide cylinder 15. The helical spring 16, which is provided between the second limiting member 42 and the top of the guide cylinder 15, is compressed and stores energy when the pressure rod 11 is pressed down. After the external force is removed, the pressure rod 11 is pushed back to its original position by the spring's restoring force. At the same time, under the action of asymmetrical load, the elastic deformation of the helical spring 16 can absorb the slight deflection of the pressure rod, thus avoiding stress concentration in the rigid structure.

[0046] For details, please refer to Figures 2 to 4 In this embodiment, the push rod mechanism 3 includes a push rod body 31. One end of the push rod body 31 is provided with a hinge shaft 32. The push rod body 31 is hinged to the rotating ring 52 through the hinge shaft 32. The other end of the push rod body 31 is fixedly connected to the second transmission member 42.

[0047] The hinge shaft 32 refers to the rotating support component that connects the push rod body 31 and the rotating ring 52. Specifically, it can be achieved by using a cylindrical pin and a shaft hole in the side wall of the rotating ring. The rotation of the hinge shaft 32 enables the conversion between the lateral linear motion of the push rod body 31 and the rotational motion of the rotating ring 52.

[0048] Specifically, the push rod body 31 is rigidly connected to the second transmission component 42 through a fixed end, directly transmitting the lateral driving force from the transmission mechanism 4 to the hinge end, driving the rotating ring 52 to rotate around the axis of the manual push rod 51. The rotation of the hinge shaft 32 allows the push rod body 31 to rotate synchronously with the rotating ring 52 during lateral sliding, avoiding motion interference caused by assembly errors or vibrations. When the drill bit is subjected to asymmetrical load impact, the hinge structure between the push rod body 31 and the rotating ring 52 can absorb radial displacement deviations, preventing the push rod mechanism 3 from jamming due to deformation under stress.

[0049] For details, please refer to Figures 2 to 4 In this embodiment, the push rod mechanism 3 also includes a transverse limiting block 33 fixedly installed on the drill bit top plate 21. The transverse limiting block 33 is symmetrically arranged on both sides of the second transmission member 42, so that the second transmission member 42 slides along the direction defined by the transverse limiting block 33. The transverse limiting block 33 is a rigid constraint component with linear guiding function. Specifically, it can be fixed to the surface of the drill bit top plate 21 by welding. Its function is to form a sliding track by clearance fit with both sides of the second transmission member 42.

[0050] Specifically, when the second transmission component 42 is driven by the first inclined surface 410 to generate a lateral sliding tendency, the guide planes on both sides of it form surface contact with the inner constraint surface of the lateral limiting block 33. During the sliding process, the double-sided constraint structure of the lateral limiting block 33 can effectively resist vibration interference forces from different directions. At the same time, the lateral limiting blocks 33 on both sides of the second transmission component 42 offset the lateral component force through the uniformly distributed constraint force. This constraint mechanism works synergistically with the transmission function of the inclined contact surface. While the transmission mechanism 4 provides axial thrust, the rigid guide structure maintains the straightness of the sliding trajectory.

[0051] For details, please refer to Figures 2 to 3 In this embodiment, the snap-fit ​​assembly 54 includes a snap-fit ​​seat 540 fixedly installed on the upper surface of the drill bottom plate 22. The snap-fit ​​seat 540 is provided with a snap-fit ​​hole 541 that is adapted to the snap-fit ​​block 53. After the snap-fit ​​block 53 passes through the snap-fit ​​hole 541, it rotates 90° and snaps into the snap-fit ​​seat 540.

[0052] The locking seat 540 is a rigid support structure fixed to the upper surface of the drill bit base plate 22 by welding, providing a stable locking base for the locking block 53. The locking hole 541 is a through hole opened on the locking seat 540, the inner diameter of which matches the maximum outer diameter of the locking block 53 to ensure accurate alignment of the locking block 53. The locking block 53 is a protruding structure set at the bottom of the manual push rod 51, the cross-sectional shape of which complements the geometric contour of the locking hole 541. It abuts against the locking seat 540 by rotation. To unlock, simply rotate the locking block 53 90° in the opposite direction to realign it with the locking hole 541, and the locking block 53 can be axially pulled away from the locking hole 541.

[0053] Through the above technical solution, this application realizes one-step alignment and locking of the locking block 53 and the locking component 54 and rapid rotation unlocking, which solves the problem of unreliable locking caused by vibration loosening in traditional locking structures. At the same time, the self-locking effect of the orthogonal rotating contact surface reduces the complexity of emergency unlocking operation and avoids the safety hazard of manually disassembling the hinge pin.

[0054] For details, please refer to Figures 2 to 3 This embodiment also includes an elastic reset mechanism 6, which includes a mounting base 61 and a reset spring 62. The mounting base 61 is fixed on the upper surface of the drill bucket top plate 21. One end of the reset spring 62 is connected to the mounting base 61, and the other end is connected to the outer circumferential surface of the rotating ring 52. When the external force is removed, the reset spring 62 pulls the rotating ring 52 to drive the manual push rod 51 to rotate in the opposite direction and reset.

[0055] The mounting base 61 is a structural component used to provide fixed support for the return spring 62. Specifically, it can be fixed to the upper surface of the drill top plate 21 by welding. Its position is adapted to the movement trajectory of the rotating ring 52 to form a rigid support base. The return spring 62 can be implemented by using a helical spring or a torsion spring. One end of it is connected to the mounting base 61, and the other end is connected to the outer circumference of the rotating ring 52 to form a traction connection, which is used to store the elastic potential energy generated when the rotating ring rotates.

[0056] Specifically, when an external force is applied to the push rod mechanism 1 to drive the push rod body 31 to slide laterally, the push rod body 31 drives the rotating ring 52 to rotate around the axis of the manual push rod 51 through the hinge shaft 32. At this time, the return spring 62 is stretched and stores elastic potential energy due to the circumferential displacement of the rotating ring, and the locking block 53 at the bottom of the manual push rod 51 disengages from the locking assembly 54. After the external force is removed, the elastic restoring force of the return spring 62 applies a reverse traction through the connection point on the outer circumference of the rotating ring 52, forcing the rotating ring 52 to rotate along a trajectory opposite to the unlocking direction, thereby driving the manual push rod 51 to accurately return to the initial angle.

[0057] For details, please refer to Figure 3 In this embodiment, the unlocking mechanism 5 also includes a push rod handle 55 fixed to the top of the manual push rod 51. The push rod handle 55 is a gripping component that forms a rigid connection with the top of the manual push rod 51. Specifically, it can be implemented using welding or threaded connection methods, and its structural design must meet the torque transmission requirements during manual rotation. This component forms an integral structure with the manual push rod through a fixed installation method, ensuring that the operating force acts directly on the push rod axis.

[0058] Specifically, when the automatic unlocking function fails to trigger due to contact failure of the power head pressure plate or stroke deviation, the operator applies rotational force by gripping the push rod handle 55, causing the manual push rod 51 to rotate around its axis. The locking block 53 at the bottom of the manual push rod 51 undergoes angular displacement with the rotation, disengaging from the locking assembly 54. The rigid connection characteristic of the push rod handle 51 avoids force transmission loss during operation, ensuring that the disengagement of the locking block 53 is synchronized with the rotation angle of the push rod handle 55. This process eliminates the need to disassemble drill string components or use external tools; emergency unlocking is achieved directly through manual rotation.

[0059] In some embodiments, the radial extension length of the push rod handle 55 can provide sufficient lever arm for the operator, for example, by welding an L-shaped metal rod to the top of the push rod, with anti-slip textured at the end to enhance grip stability.

[0060] This solution creates an independent manual operation interface by adding a push rod handle 55, eliminating complete dependence on the power head pressure plate and retaining a manual intervention path when automatic unlocking fails.

[0061] This utility model also provides a sand dredging bucket, including any one of the above-mentioned manual / automatic sand dredging bucket unlocking devices. This sand dredging bucket incorporates all the technical solutions of the manual / automatic sand dredging bucket unlocking device and possesses at least all the advantages of the manual / automatic sand dredging bucket unlocking device, which will not be elaborated here.

[0062] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A manual / automatic dual-purpose sand-dredging drill bucket unlocking device, characterized in that, include: The pressure bar mechanism is fixed vertically to the upper surface of the drill bit top plate; The push rod mechanism is horizontally and laterally slidably mounted on the upper surface of the drill bucket top plate; A transmission mechanism, one end of which is connected to the pressure rod mechanism and the other end of which is connected to one end of the push rod mechanism, converts the vertical movement of the pressure rod mechanism into the lateral sliding of the push rod mechanism; an unlocking mechanism includes a manual push rod and a rotating ring. The manual push rod is vertically inserted through the top plate of the drill bucket, with its top end extending above the upper surface of the top plate and its bottom end extending downwards to the top of the bottom plate; the rotating ring is sleeved and fixed on the outer circumference of the manual push rod and located on the rod body on the upper surface of the top plate of the drill bucket, and the rotating ring is drively connected to the other end of the push rod mechanism; the bottom end of the manual push rod is provided with a locking block, which selectively engages with a locking assembly fixed on the bottom plate of the drill bucket; When an external force is applied to the pressure rod mechanism, the pressure rod mechanism drives the push rod mechanism to slide laterally through the transmission mechanism. The push rod mechanism drives the rotating ring to rotate, causing the manual push rod to rotate around its axis, thereby driving the locking block to disengage from the locking assembly.

2. The lockout device of claim 1, wherein: The transmission mechanism includes a first transmission component and a second transmission component that slide and cooperate with each other. The first transmission component is fixedly connected to the pressure rod mechanism, and the second transmission component is fixedly connected to one end of the push rod mechanism. The first transmission component is provided with a first inclined contact surface, and the second transmission component is provided with a second inclined contact surface that slides and cooperates with the first inclined contact surface.

3. The lockout device of claim 2, wherein: The pressure rod mechanism includes a pressure rod and a limiting plate. The limiting plate is fixedly connected to the drill bucket connection, and the top end of the pressure rod passes through the limiting plate and is provided with a first limiting member. The first transmission member is located on the lower end side wall of the pressure rod. The top plate of the drill bucket is provided with a through guide hole for the pressure rod and the first transmission member to slide vertically. When an external force is applied to the upper end of the pressure rod, the first transmission member moves downward and abuts against the second inclined surface through the first inclined contact surface, thereby driving the push rod mechanism to slide laterally until the first limiting member abuts against the upper surface of the limiting plate.

4. The lockout device of claim 3, wherein: The pressure rod mechanism further includes a second limiting member sleeved on the pressure rod and a guide cylinder installed vertically in the through guide hole. The side wall of the guide cylinder is provided with a limiting cut that is adapted to the first transmission member. The second limiting member is located below the limiting plate. A helical spring is provided between the second limiting member and the guide cylinder. The two ends of the helical spring abut against the lower surface of the second limiting member and the top end of the guide cylinder, respectively.

5. The lockout device of claim 3, wherein: The push rod mechanism includes a push rod body, one end of which is provided with a hinge shaft. The push rod body is hinged to the rotating ring through the hinge shaft, and the other end of the push rod body is fixedly connected to the second transmission component.

6. The lockout device of claim 2, wherein: The push rod mechanism also includes a lateral limiting block fixedly installed on the top plate of the drill bucket. The lateral limiting block is symmetrically arranged on both sides of the second transmission member, so that the second transmission member slides along the direction defined by the lateral limiting block.

7. The lockout device of claim 1, wherein: The snap-fit ​​assembly includes a snap-fit ​​base fixedly installed on the upper surface of the drill bit base plate. The snap-fit ​​base is provided with a snap-fit ​​hole adapted to the snap-fit ​​block. After the snap-fit ​​block passes through the snap-fit ​​hole, it rotates 90° and snaps into the snap-fit ​​base.

8. The manual / automatic dual-purpose sand-dredging bucket unlocking device according to claim 1, characterized in that: It also includes an elastic reset mechanism, which includes a mounting base and a reset spring. The mounting base is fixed on the upper surface of the drill bit top plate, and one end of the reset spring is connected to the mounting base, while the other end is connected to the outer circumferential surface of the rotating ring. When the external force is removed, the reset spring pulls the rotating ring to drive the manual push rod to rotate in the opposite direction and reset.

9. The on-demand sand bailer of claim 1, wherein: The unlocking mechanism also includes a push rod handle fixed to the top of the manual push rod.

10. A suction dredge, characterized by, Includes the manual / automatic sand-dredging bucket unlocking device as described in any one of claims 1-9.

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