Bucket gravity tongs

Abstract

The utility model discloses a kind of bucket valve gravity tongs, including jaw body assembly, clamping assembly and lifting ring assembly;The jaw body assembly includes symmetrically arranged and one end is fixed by reinforcing plate welding first jaw body and second jaw body, and the first jaw body and the second jaw body are U-shaped structure;The clamping assembly is located in the clamping end inside of jaw body assembly and the end of the clamping assembly is equipped with the convex tooth tooth structure matched with grab bucket valve, the utility model relates to hoist sling technical field, adopt the convex tooth tooth structure matched with bucket valve, occlusion depth is big, and antiskid performance is good;Utilize gravity drive connecting rod mechanism, automatic locking when lifting, automatically loosen when putting down, without additional power source;Pre-tightening limiting component not only can play the limiting effect, and tension spring plays certain buffering effect, reduces the rigid impact of lifting instant, protects grab bucket and tong body.

Description

Technical Field

[0001] This utility model relates to the field of lifting and hoisting equipment technology, specifically to a bucket-shaped gravity clamp. Background Technology

[0002] The grab bucket is a core piece of equipment in the waste-to-energy incineration industry for waste transfer. Its bucket segments are consumable parts, requiring frequent lifting, replacement, and maintenance. Current lifting methods mostly use wire rope binding, which presents the following problems:

[0003] 1. The binding method is inefficient, prone to slippage, and poses a safety hazard;

[0004] 2. The clamping surface of the general-purpose clamp does not match the arc-shaped structure of the bucket petals, resulting in unstable clamping and easy damage to the surface of the bucket petals;

[0005] 3. The clamping range is fixed and cannot be adapted to different sizes of grab bucket segments;

[0006] To address the specific needs of grab bucket segment hoisting, there is an urgent need for a gravity clamp that is structurally adaptable, reliably clamped, and easy to operate. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a bucket-shaped gravity clamp, which solves the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a bucket-shaped gravity clamp, comprising a clamp body assembly, a clamping assembly, and a lifting ring assembly; the clamp body assembly includes a first clamp body and a second clamp body symmetrically arranged and fixed at one end by welding a reinforcing plate, both the first and second clamp bodies being U-shaped structures; the clamping assembly is located inside the clamping end of the clamp body assembly, and the end of the clamping assembly is provided with a toothed structure matching the bucket-shaped part; a quick-release pin is inserted into the clamp body assembly, the quick-release pin abutting against the clamping assembly; the lifting ring assembly is installed on the top of the clamp body assembly and slides in cooperation with the limiting grooves inside the first and second clamp bodies.

[0009] The aforementioned clamping assembly includes a movable clamping block hinged between the first clamping body and the second clamping body. A fixed clamping block is provided on one side of the reinforcing plate corresponding to the position of the movable clamping block. One end of the movable clamping block is rotatably engaged with a connecting rod, and the upper end of the connecting rod is rotatably engaged with a lifting ring assembly. A pre-tightening limiting member is provided between the connecting rod and the first and second clamping bodies. By setting the movable clamping block and the fixed clamping block, a bidirectional clamping force is formed. With the connection rod transmission, automatic locking is achieved by using gravity.

[0010] The aforementioned pre-tightening limiting component includes a connecting seat that rotatably engages with the lower end of the connecting rod. The top of the connecting seat is connected to a tension spring, and the top of the tension spring is connected to a pre-tightening block. The two sides of the pre-tightening block are rotatably engaged with a first clamp and a second clamp, respectively.

[0011] The aforementioned preload block is equipped with a pull ring, which allows operators to manually adjust the position of the preload block, facilitating maintenance and installation.

[0012] The movable clamping block has an arc-shaped tooth structure at one end, and the fixed clamping block has a plate-shaped tooth structure at one end. Both the movable and fixed clamping blocks are made of high-strength wear-resistant alloy steel and the tooth structure is coated with a wear-resistant coating. The arc-shaped tooth and the plate-shaped tooth adapt to the different curvatures of the bucket petals, increasing the contact area and biting force. The wear-resistant coating significantly extends the service life of the vulnerable parts.

[0013] The aforementioned lifting ring assembly includes a forged alloy steel lifting ring. A wear-resistant bushing is provided between the movable seat of the alloy steel lifting ring and the limiting slide groove. The wear-resistant bushing reduces the sliding friction coefficient, improves the smoothness of lifting and lowering of the lifting ring assembly and the durability of the overall structure.

[0014] This utility model provides a bucket-shaped gravity clamp. It has the following beneficial effects:

[0015] It has a stable clamping mechanism and adopts a tooth structure that matches the bucket petals, resulting in a large bite depth and good anti-slip performance.

[0016] It is easy to operate, using gravity to drive the linkage mechanism. It automatically locks when lifting and automatically releases when lowering, requiring no additional power source.

[0017] Protective equipment: The pre-tensioned limiting components not only serve as limiting devices, but the tension springs also provide a certain buffering effect, reducing the rigid impact at the moment of lifting and protecting the grab bucket and clamp body.

[0018] It is highly durable, with key load-bearing components made of high-strength wear-resistant alloy steel and surface coating treatment, and wear-resistant bushings added to sliding parts to adapt to harsh working conditions;

[0019] Easy maintenance: The quick-release pin design and the pull ring design on the pre-tightening block make the equipment easier and faster to use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the bucket-shaped gravity clamp of this utility model.

[0021] Figure 2 This is a three-dimensional structural diagram of the bucket-shaped gravity clamp described in this utility model.

[0022] Figure 3 This is a top view of the bucket-shaped gravity clamp of the present invention.

[0023] Figure 4 This is a schematic diagram of the front cross-sectional structure of the bucket-shaped gravity clamp of this utility model.

[0024] Figure 5This is a partial isometric structural diagram of the bucket-shaped gravity clamp of this utility model.

[0025] In the diagram: 1. Clamp body assembly; 101. First clamp body; 102. Second clamp body; 103. Reinforcing plate; 104. Limiting groove; 2. Clamping assembly; 201. Movable clamping block; 202. Fixed clamping block; 203. Teeth structure; 204. Connecting rod; 3. Lifting ring assembly; 301. Lifting ring; 302. Moving seat; 4. Quick release pin; 5. Pre-tensioning limiting component; 501. Connecting seat; 502. Tension spring; 503. Pre-tensioning block; 504. Pull ring. Detailed Implementation

[0026] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example: Figures 1 to 5 As shown, this application specifically designs a bucket-shaped gravity clamp, which mainly consists of a clamp body assembly 1, a clamping assembly 2, and a lifting ring assembly 3.

[0028] The clamp assembly 1 serves as the main frame, comprising a first clamp 101 and a second clamp 102 arranged symmetrically. One end of each clamp is welded and fixed by a thick reinforcing plate 103, forming a stable frame structure. Both the first clamp 101 and the second clamp 102 are U-shaped, with vertically extending limiting grooves 104 formed on their inner sidewalls.

[0029] The lifting ring assembly 3 is mounted on top of the clamp body assembly 1. Specifically, the lifting ring assembly 3 includes a lifting ring 301 made of forged alloy steel, with a movable seat 302 connected to the bottom of the lifting ring 301. The two sides of the movable seat 302 are embedded in the limiting slide groove 104 and can slide up and down along the slide groove. To reduce wear and ensure smooth sliding, a wear-resistant bushing is press-fitted between the movable seat 302 and the limiting slide groove 104.

[0030] The clamping assembly 2 is located inside the clamping end of the clamping body assembly 1; specifically, it includes a movable clamping block 201 and a fixed clamping block 202. The fixed clamping block 202 is fixed to one side of the reinforcing plate 103 by bolts or direct welding. The end of the movable clamping block 201 is hinged between the first clamping body 101 and the second clamping body 102 by a pin. Both the movable clamping block 201 and the fixed clamping block 202 have a toothed structure 203 at their clamping ends, wherein the toothed structure of the movable clamping block 201 is arc-shaped and the toothed structure of the fixed clamping block 202 is plate-shaped to adapt to the shape of the grab bucket flap. To enhance wear resistance, both the movable clamping block 201 and the fixed clamping block 202 are made of high-strength wear-resistant alloy steel, and the surface of the toothed structure 203 is coated with a wear-resistant coating of tungsten carbide or a similar material.

[0031] To achieve gravity drive, the rear end (power arm end) of the movable clamp 201 is rotatably connected to the lower end of a connecting rod 204. The upper end of the connecting rod 204 is rotatably connected to the movable seat 302 of the lifting ring assembly 3.

[0032] In addition, this solution also includes a pre-tensioning limiting component 5. This component includes a connecting seat 501, a tension spring 502, and a pre-tensioning block 503. The connecting seat 501 is rotatably engaged with the lower end of the connecting rod 204. The tension spring 502 is connected between the top of the connecting seat 501 and the pre-tensioning block 503. The two sides of the pre-tensioning block 503 are rotatably engaged with the first clamping body 101 and the second clamping body 102 via pins. A pull ring 504 is also provided on the pre-tensioning block 503 for easy operation. In its natural state, the tension spring 502 is not under force, keeping the movable clamping block 201 slightly taut. After clamping in place, the pre-tensioning block 503 is flipped upwards, and the tension spring 502 is in a stretched state, restricting the connecting rod 204 and the movable clamping block 201 to the working position. During lifting, the tension spring 502 acts as a buffer to prevent excessive instantaneous force.

[0033] To facilitate disassembly and maintenance, a quick-release pin 4 is inserted into the upper middle part of the clamp body assembly 1. The quick-release pin 4 passes through the first clamp body 101 and the second clamp body 102 laterally and abuts against the clamping assembly 2 (specifically the side of the connecting rod 204) to provide limiting and auxiliary support.

[0034] Working principle:

[0035] During operation, the hook of the lifting equipment hooks onto the lifting ring 301. In the initial state, due to the limiting effect of the quick-release pin 4, the lower end of the lifting ring 301, the movable seat 302, and the top of the connecting rod 204 are both located at the lower part of the limiting slide groove 104. At this time, the connecting rod 204 pushes the movable clamping block 201 diagonally downward, so that the movable clamping block 201 and the fixed clamping block 202 are in an open state.

[0036] Move the clamps above the bucket segment to be transported and slowly lower them. Once the clamps are in position, pull out the quick-release pin 4. At the moment of lifting, the lifting ring 301, along with the moving seat 302 and the connecting rod 204, moves upward. The load is transmitted through the connecting rod 204, generating a huge leverage force that forces the movable clamp 201 to rotate around its rotatable connection position with the clamp body assembly 1 toward the bucket segment. With the cooperation of the fixed clamp 202, the bucket segment is locked from both directions. At this time, pull up the pre-tightening block 503 in the pre-tightening limit component 5. During this process, the tension spring 502 is stretched, locking the connecting rod 204 and the movable clamp 201 in their current positions. In addition, the elasticity of the tension spring 502 can absorb some of the impact energy, preventing damage from a hard collision. When the hoisting is in place and it is necessary to unload or loosen the clamp, the lifting ring 301 is lowered, the gravity disappears, the pre-tightening block 503 is reset, the movable clamp 201 is reset, the bucket is loosened, and the quick-release pin 4 is reinserted, so the movable clamp 201 remains in the loosened state. At this time, the clamp is lifted and removed, and the hoisting operation is completed.

[0037] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bucket-shaped gravity clamp, characterized in that, The device includes a clamp body assembly, a clamping assembly, and a lifting ring assembly. The clamp body assembly includes a first clamp body and a second clamp body that are symmetrically arranged and fixed at one end by welding a reinforcing plate. Both the first and second clamp bodies are U-shaped structures. The clamping assembly is located inside the clamping end of the clamp body assembly, and the end of the clamping assembly has a toothed structure that matches the grab bucket flap. A quick-release pin is inserted into the clamp body assembly and abuts against the clamping assembly. The lifting ring assembly is installed on the top of the clamp body assembly and slides in cooperation with the limiting grooves inside the first and second clamp bodies.

2. The bucket-shaped gravity clamp according to claim 1, characterized in that, The clamping assembly includes a movable clamping block hinged between the first clamping body and the second clamping body. A fixed clamping block is provided on one side of the reinforcing plate corresponding to the position of the movable clamping block. One end of the movable clamping block is rotatably engaged with a connecting rod. The upper end of the connecting rod is rotatably engaged with a lifting ring assembly. A pre-tightening limiting member is provided between the connecting rod and the first clamping body and the second clamping body.

3. The bucket-shaped gravity clamp according to claim 2, characterized in that, The pre-tightening limiting component includes a connecting seat that rotatably engages with the lower end of the connecting rod. The top of the connecting seat is connected to a tension spring, and the top of the tension spring is connected to a pre-tightening block. The two sides of the pre-tightening block are rotatably engaged with a first clamp and a second clamp, respectively.

4. The bucket-shaped gravity clamp according to claim 3, characterized in that, The pre-tightening block is equipped with a pull ring.

5. The bucket-shaped gravity clamp according to claim 2, characterized in that, One end of the movable clamping block has an arc-shaped protruding tooth structure, and one end of the fixed clamping block has a plate-shaped protruding tooth structure. Both the movable clamping block and the fixed clamping block are made of high-strength wear-resistant alloy steel, and the surface of the protruding tooth structure is coated with a wear-resistant coating.

6. The bucket-shaped gravity clamp according to claim 1, characterized in that, The lifting ring assembly includes a forged alloy steel lifting ring, and a wear-resistant bushing is provided between the movable seat of the alloy steel lifting ring and the limiting slide groove.

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