A multi-petal clamshell crane

Abstract

This utility model discloses a multi-lobed grab bucket crane, relating to the field of crane grab bucket technology, aiming to solve the technical problems of poor adhesion between the scraper blade and the inner wall of the grab bucket, numerous cleaning blind spots, and incomplete removal of residual materials. The multi-lobed grab bucket crane includes a frame, with multiple grab buckets hinged to the bottom of the frame. An expansion mechanism is provided at the bottom of the frame, and a cleaning mechanism is provided on the outside of the expansion mechanism. This utility model uses a limiting block to drive a sliding rod to slide along the mounting frame, thereby realizing the expansion and contraction of the fixed frame. The position of the fixed frame can be adaptively adjusted according to the opening and closing state of the grab bucket. The elastic reaction force of the elastic blades ensures that the rubber brush block always fits tightly against the arc-shaped surface of the grab bucket's inner wall. Even if there are slight deformations or unevenness in the inner wall of the grab bucket, it still ensures uniform scraping force and effectively removes residual materials. This solves the current problems of poor adhesion between the scraper blade and the inner wall of the grab bucket, numerous cleaning blind spots, and incomplete removal of residual materials.

Description

Technical Field

[0001] This utility model relates to the field of crane grab technology, and more specifically, to a multi-lobed grab crane. Background Technology

[0002] Multi-grab cranes, as key equipment for bulk material handling, are widely used in ports, mines, waste treatment, and other scenarios. They achieve material grabbing and transfer through the opening and closing of multiple grabs. In actual operation, the materials grabbed by the grabs often contain sticky components (such as wet soil, silt, sticky ore, etc.) or fine particles. After grabbing and discharging, some material tends to remain on the inner wall of the grab. If the residual material is not cleaned in time, long-term accumulation will lead to increased resistance to grab opening and closing, reduced grabbing capacity, and affect the service life and operating efficiency of the equipment.

[0003] In existing technologies, cleaning the inner wall of a grab bucket largely relies on simple mechanical scraping structures. These structures typically use scrapers with fixed angles or rigid connections, whose angles and shapes cannot be flexibly adjusted according to actual needs. However, the inner wall of a grab bucket, designed to accommodate material grabbing, generally exhibits a curved surface, often resulting in gaps or partial disengagement between the scraper and the inner wall. This creates numerous cleaning blind spots, preventing the complete removal of residual material from the inner wall. Therefore, we propose a multi-lobed grab bucket crane. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a multi-lobed grab bucket crane to solve the technical problems of the scraper not fitting tightly with the inner wall of the grab bucket, having many blind spots in cleaning, and being unable to completely remove residual materials.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a multi-lobed grab bucket crane, including a frame, with multiple grab buckets hinged to the bottom of the frame, an expansion mechanism at the bottom of the frame, and a cleaning mechanism on the outside of the expansion mechanism; the expansion mechanism includes a mounting frame, a sliding rod, a limiting block, a fixing frame, and a rotating disk, the mounting frame being located at the bottom of the frame, the sliding rod being slidably mounted in a corresponding sliding groove on the mounting frame, the rotating disk being rotatably mounted inside the mounting frame, and the limiting block being fixedly mounted on the outside of the sliding rod and movably mounted in an arc-shaped sliding groove on the surface of the rotating disk; the cleaning mechanism includes an elastic wing, a rubber pad, and a rubber brush block, the fixing frame having an installation groove inside, the elastic wing being located inside the installation groove, the rubber pad being fixedly mounted inside the fixing frame and abutting against the free end of the elastic wing, and a rubber brush block being provided on the outer surface of the rubber pad; the expanding fixing frame causes the rubber pad and rubber brush block to adhere to the inner wall of the grab bucket and compress the elastic wing.

[0006] Preferably, the expansion mechanism further includes an electric push rod, which is fixedly installed at the bottom of the frame, and the mounting bracket is fixedly installed at the output end of the electric push rod. A motor is fixedly installed at the top of the mounting bracket, and a gear is fixedly installed at the output end of the motor. A gear ring that meshes with the gear is fixedly installed on the outside of the rotating disk. A corrugated pipe is fixedly installed between the fixed bracket and the mounting bracket, and the corrugated pipe wraps around the outside of the sliding rod.

[0007] Preferably, the cleaning mechanism further includes crushing teeth disposed at the bottom of the rubber pad.

[0008] Preferably, the breaking teeth are spaced apart at the bottom edge of the rubber pad and extend beyond the lower end face of the rubber brush block.

[0009] Preferably, the number of sliding rods matches the number of grab bucket segments, and each sliding rod is independently connected to the arc-shaped groove of the rotating disk through a limiting block.

[0010] Preferably, the elastic flap is pre-compressed and installed in the mounting groove of the fixing frame to provide continuous elastic resistance to the rubber pad.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a limiting block to drive a sliding rod to slide along the mounting frame, thereby achieving the expansion and contraction of the fixed frame. The position of the fixed frame can be adaptively adjusted according to the opening and closing state of the grab bucket. When the fixed frame expands, the rubber pad and rubber brush block adhere to the inner wall of the grab bucket and compress the elastic blades. The elastic reaction force of the elastic blades ensures that the rubber brush block remains tightly fitted to the arc-shaped surface of the grab bucket's inner wall. Even if there are minor deformations or unevenness in the inner wall of the grab bucket, the scraping force remains uniform, effectively removing residual materials. This solves the current problems of loose adhesion between the scraper and the inner wall of the grab bucket, numerous cleaning blind spots, and incomplete removal of residual materials.

[0012] 2. This utility model also features a series of crushing teeth at the bottom of the rubber pad, which are spaced apart and extend beyond the lower end of the rubber brush block. During the process of the electric push rod pushing the mounting frame down, the crushing teeth can preferentially contact and crush the clumps of material on the inner wall of the grab bucket, thus preventing the rubber brush block from failing due to the high hardness of the clumps and enabling the subsequent rubber brush block to more efficiently remove the residual material after crushing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a schematic diagram of the top structure of the expansion mechanism of this utility model; Figure 3 This is a schematic diagram of the bottom structure of the expansion mechanism of this utility model; Figure 4 This is a schematic diagram of the top cross-sectional structure of the cleaning mechanism of this utility model; Figure 5 This is a schematic diagram of the bottom structure of the cleaning mechanism of this utility model; Figure 6 This is a schematic diagram of one usage state of the present invention.

[0014] The following are the labels in the diagram: 1. Frame; 2. Expansion mechanism; 21. Electric push rod; 22. Mounting bracket; 23. Motor; 231. Gear; 24. Sliding rod; 241. Limiting block; 25. Fixing bracket; 26. Rotating disk; 261. Gear ring; 262. Arc-shaped slide; 27. Bellows; 3. Cleaning mechanism; 31. Elastic wing; 32. Rubber pad; 321. Rubber brush block; 33. Crushing tooth; 4. Grab bucket; 5. Hydraulic cylinder. Detailed Implementation

[0015] Example: Figures 1 to 6As shown, this utility model relates to a multi-lobed grab bucket crane, including a frame 1. Multiple grab buckets 4 are hinged to the bottom of the frame 1. An expansion mechanism 2 is provided at the bottom of the frame 1, and a cleaning mechanism 3 is provided on the outside of the expansion mechanism 2. The expansion mechanism 2 includes a mounting frame 22, sliding rods 24, limiting blocks 241, a fixing frame 25, and a rotating disk 26. The mounting frame 22 is located at the bottom of the frame 1. The sliding rods 24 are slidably installed inside corresponding sliding grooves in the mounting frame 22. The number of sliding rods 24 matches the number of grab bucket lobes. Each sliding rod 24 is independently connected to the arc-shaped sliding groove 262 of the rotating disk 26 through the limiting blocks 241. The rotating disk 26 is rotatably installed inside the mounting frame 22. The limiting blocks 241 are fixedly installed on the outside of the sliding rods 24 and movably installed on the rotating disk 26. The surface of the 6-shaped arc-shaped groove 262 is inside; the cleaning mechanism 3 includes an elastic wing 31, a rubber pad 32 and a rubber brush block 321. The fixed frame 25 has an installation groove inside, the elastic wing 31 is set inside the installation groove, the rubber pad 32 is fixedly installed inside the fixed frame 25 and abuts against the free end of the elastic wing 31. The elastic wing 31 is pre-compressed and installed in the installation groove of the fixed frame 25 to provide continuous elastic pressure to the rubber pad 32. The outer surface of the rubber pad 32 is provided with a rubber brush block 321; the expanding fixed frame 25 makes the rubber pad 32 and the rubber brush block 321 fit against the inner wall of the grab bucket 4 and squeeze the elastic wing 31. This utility model drives the sliding rod 24 to slide along the mounting frame 22 through the limiting block 241, thereby realizing the expansion and contraction of the fixed frame 25. The position of the fixing frame 25 can be adaptively adjusted according to the opening and closing state of the grab bucket 4. When the fixing frame 25 expands, the rubber pad 32 and the rubber brush block 321 adhere to the inner wall of the grab bucket 4 and squeeze the elastic wing 31. The elastic reaction force of the elastic wing 31 ensures that the rubber brush block 321 always fits tightly against the arc-shaped surface of the inner wall of the grab bucket 4. Even if there are slight deformations or unevenness in the inner wall of the grab bucket 4, the scraping force can still be uniform, effectively removing residual materials. At the same time, the rubber brush block 321 is soft and wear-resistant, which can not only avoid scratching the inner wall of the grab bucket 4, but also thoroughly clean up fine residues, solving the current problems of poor adhesion between the scraper and the inner wall of the grab bucket 4, many blind spots in cleaning, and incomplete removal of residual materials.

[0016] Furthermore, such as Figures 2 to 3As shown, the expansion mechanism 2 also includes an electric push rod 21, which is fixedly installed at the bottom of the frame 1. The mounting frame 22 is fixedly installed at the output end of the electric push rod 21. A motor 23 is fixedly installed at the top of the mounting frame 22. A gear 231 is fixedly installed at the output end of the motor 23. A gear ring 261 that meshes with the gear 231 is fixedly installed on the outside of the rotating disk 26. A bellows 27 is fixedly installed between the fixed frame 25 and the mounting frame 22. The bellows 27 wraps around the outside of the sliding rod 24. The bellows 27 between the fixed frame 25 and the mounting frame 22 can effectively prevent dust, debris and other impurities in the working environment from entering the sliding contact part between the sliding rod 24 and the mounting frame 22, and avoid impurities causing sliding jamming or component wear.

[0017] Furthermore, such as Figures 4 to 5 As shown, the cleaning mechanism 3 also includes crushing teeth 33, which are located at the bottom of the rubber pad 32. The crushing teeth 33 are spaced apart at the bottom edge of the rubber pad 32 and extend beyond the lower end face of the rubber brush block 321. With the crushing teeth 33 spaced apart at the bottom of the rubber pad 32 and extending beyond the lower end face of the rubber brush block 321, the crushing teeth 33 can preferentially contact and crush the clumps of material on the inner wall of the grab bucket 4 during the process of the electric push rod 21 pushing the mounting frame 22 down. This avoids the rubber brush block 321 from failing to scrape due to the high hardness of the clumps, and allows the subsequent rubber brush block 321 to more efficiently remove the residual material after crushing.

[0018] Working principle: This embodiment provides a multi-lobed grab bucket crane. In use, after the grab bucket 4 grabs and releases the material, the hydraulic cylinder 5 is used to open the grab bucket 4. During the opening operation, the electric push rod 21 is activated, which pushes the mounting frame 22 to move down. The motor 23 is activated, and the output end of the motor 23 drives the gear 231 to rotate. The gear 231 meshes with the gear ring 261 fixedly installed on the outside of the rotating disk 26, which drives the rotating disk 26 to rotate. This causes the limiting block 241 to slide inside the arc-shaped sliding groove 262, which in turn causes the sliding rod 24 to slide inside the sliding groove opened on the inner side of the mounting frame 22. This causes the fixed frame 25 to expand. The bellows 27 is set between the fixed frame 25 and the mounting frame 22 and wraps around the sliding rod 24, extending as the sliding rod 24 moves.

[0019] During the expansion of the fixed frame 25, the rubber pad 32 inside the fixed frame 25 will touch the inner wall of the grab bucket 4, thereby squeezing the elastic wing 31 inside the rubber pad 32 and the fixed frame 25, so that the rubber brush block 321 fixedly installed outside the rubber pad 32 can fit against the inner wall of the grab bucket 4.

[0020] When the electric push rod 21 is activated, the output end of the electric push rod 21 pushes the mounting bracket 22 downward, thereby enabling the rubber brush block 321 to scrape off the material adhering to the inner wall of the grab bucket 4. During the scraping process, the crushing teeth 33 can crush the clumped material, making it easier to scrape it off with the rubber brush block 321 later.

[0021] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A multi-lobed grab bucket crane, comprising a frame (1), characterized in that, The frame (1) has multiple sets of grabs (4) hinged at the bottom, and the frame (1) has an expansion mechanism (2) at the bottom, and a cleaning mechanism (3) is provided on the outside of the expansion mechanism (2). The expansion mechanism (2) includes a mounting frame (22), a sliding rod (24), a limiting block (241), a fixing frame (25), and a rotating disk (26). The mounting frame (22) is located at the bottom of the frame (1). The sliding rod (24) is slidably installed inside the sliding groove corresponding to the mounting frame (22). The rotating disk (26) is rotatably installed inside the mounting frame (22). The limiting block (241) is fixedly installed outside the sliding rod (24) and movably installed inside the arc-shaped sliding groove (262) on the surface of the rotating disk (26). The cleaning mechanism (3) includes an elastic wing (31), a rubber pad (32) and a rubber brush block (321). The fixing frame (25) has an installation groove inside. The elastic wing (31) is set inside the installation groove. The rubber pad (32) is fixedly installed inside the fixing frame (25) and abuts against the free end of the elastic wing (31). The outer surface of the rubber pad (32) is provided with a rubber brush block (321). The expanded fixing frame (25) causes the rubber pad (32) and rubber brush block (321) to adhere to the inner wall of the grab bucket (4) and compress the elastic blade (31).

2. A multi-lobed grab bucket crane according to claim 1, characterized in that, The expansion mechanism (2) also includes an electric push rod (21), which is fixedly installed at the bottom of the frame (1). The mounting bracket (22) is fixedly installed at the output end of the electric push rod (21). A motor (23) is fixedly installed at the top of the mounting bracket (22). A gear (231) is fixedly installed at the output end of the motor (23). A gear ring (261) that meshes with the gear (231) is fixedly installed on the outside of the rotating disk (26). A corrugated pipe (27) is fixedly installed between the fixed frame (25) and the mounting frame (22), and the corrugated pipe (27) is wrapped around the outside of the sliding rod (24).

3. A multi-lobed grab bucket crane according to claim 2, characterized in that, The cleaning mechanism (3) also includes a breaking tooth (33), which is disposed at the bottom of the rubber pad (32).

4. A multi-lobed grab bucket crane according to claim 3, characterized in that, The breaking teeth (33) are spaced apart at the bottom edge of the rubber pad (32) and extend beyond the lower end face of the rubber brush block (321).

5. A multi-lobed grab bucket crane according to claim 2, characterized in that, The number of sliding rods (24) matches the number of petals of the grab bucket (4), and each sliding rod (24) is independently connected to the arc-shaped groove (262) of the rotating disk (26) through a limiting block (241).

6. A multi-lobed grab bucket crane according to claim 3, characterized in that, The elastic flap (31) is pre-compressed and installed in the mounting groove of the fixing frame (25) to provide continuous elastic resistance to the rubber pad (32).

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