Self-adjusting drainage grab

Abstract

The utility model relates to a self -adjusting drainage grab bucket, including two opposite setting bucket body, through the support pull rod with the upper crosspiece of bucket body articulation, be located in the upper crosspiece lower extreme and with two bucket body articulation lower crosspiece, be equipped with upper pulley set on the upper crosspiece, be equipped with lower pulley set on the lower crosspiece, the lower pulley set includes the lower pin shaft setting on the lower crosspiece, the sequential arrangement of several lower pulley pieces along the lower pin shaft axial, the lower pulley piece is opened and is equipped with the perforation for the lower pin shaft to pass through on, the diameter of perforation is greater than the diameter of lower pin shaft. The utility model discloses when using, make the clearance between lower pulley piece and lower pin shaft, when the opening and closing steel wire rope in the lifting process bucket body closes and picks up the material and appears skew, can pass through the slight slippage of lower pulley piece, alleviate the inclination angle, avoid because the inclination angle is bigger, lead to the steel wire rope appears the groove and the breakage of the occurrence, make lower pulley piece not use bearing simultaneously, avoid the damage because bearing rust.

Description

Technical Field

[0001] This utility model relates to the field of grab buckets, and more particularly to the field of pulley-type grab bucket technology, specifically referring to a self-adjusting drainage grab bucket. Background Technology

[0002] A grab bucket is a type of lifting machinery and a component of a grab bucket crane. It is used to grab and unload bulk materials. Grab buckets include pulley-type grab buckets and hydraulic grab buckets. In use, a grab bucket with pulleys is connected to the crane's lifting wire ropes via two sets of wire rope fixing wedges of the suspension device, forming a double-lifting-point integral suspension. The overall lifting and lowering of the grab bucket is achieved by raising and lowering the two lifting wire ropes. The other two opening and closing wire ropes connect the upper pulley block to the lower pulley block of the lower crossbeam frame via wire rope guide pulleys on the upper crossbeam frame. When the opening and closing wire ropes are lowered, the grab bucket opens; when the opening and closing wire ropes are raised via the lifting mechanism, the grab bucket closes.

[0003] The current design of grab buckets has several drawbacks when operating in areas with stagnant water, such as the bottom of the grab bucket being prone to tearing. Additionally, due to prolonged operation in stagnant water areas, the bearings are susceptible to corrosion and damage caused by water ingress and poor lubrication, which affects their efficiency. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a self-adjusting drainage grab bucket. A gap exists between the lower sliding wheel and the lower pin. When the opening and closing wire rope tilts during the lifting process and the bucket closes to grab material, the slight slippage of the lower sliding wheel can reduce the tilt angle, preventing the wire rope from slipping out of its groove and breaking due to a large tilt angle. Simultaneously, the lower sliding wheel does not use bearings, avoiding damage caused by bearing corrosion.

[0005] This utility model is a self-adjusting drainage grab bucket achieved through the following technical solution, comprising two buckets arranged opposite to each other, an upper crossbeam hinged to the buckets via a support rod, and a lower crossbeam located at the lower end of the upper crossbeam and hinged to the two buckets. The upper crossbeam is provided with an upper pulley assembly, and the lower crossbeam is provided with a lower pulley assembly. The lower pulley assembly includes a lower pin shaft arranged on the lower crossbeam, and a plurality of lower pulley plates arranged sequentially along the axial direction of the lower pin shaft. The lower pulley plates have through holes for the lower pin shaft to pass through, and the diameter of the through holes is larger than the diameter of the lower pin shaft.

[0006] In use, this invention creates a gap between the lower sliding wheel and the lower pin. When the wire rope tilts during the lifting process and the bucket closes to grab the material, the slight sliding of the lower sliding wheel can reduce the tilt angle and prevent the wire rope from going out of the groove and breaking due to a large tilt angle. At the same time, the lower sliding wheel does not use bearings, thus avoiding damage due to bearing corrosion.

[0007] Preferably, a copper sleeve is fixedly connected inside the perforation of the lower sliding wheel, and the inner diameter of the copper sleeve is larger than the outer diameter of the lower pin.

[0008] This preferred solution improves the service life of the sliding wheel by using a copper sleeve to create friction between the copper sleeve and the lower pin.

[0009] Preferably, the upper pulley assembly includes an upper pin shaft mounted on the upper crossbeam, and a plurality of upper pulley plates arranged sequentially along the axial direction of the upper pin shaft. The upper pulley plates are provided with through holes for the upper pin shaft to pass through. The diameter of the through holes is larger than the diameter of the upper pin shaft. A copper sleeve is also fixedly connected inside the through holes of the upper pulley plates. The inner diameter of the copper sleeve is larger than the outer diameter of the upper pin shaft.

[0010] This preferred solution uses the same upper pulley and lower pulley, which further adjusts and reduces the tilt angle.

[0011] Preferably, the gap thickness between the copper sleeve and the lower pin is 0.01-0.05 mm.

[0012] Preferably, a drainage hole is provided on the side of the bucket. This preferred embodiment improves the drainage efficiency of water accumulated inside the grab bucket when it is closed by providing a drainage hole.

[0013] Preferably, a wear-resistant liner is installed at the bottom of the bucket. This preferred embodiment enhances the wear resistance of the bucket by installing the wear-resistant liner.

[0014] Preferably, the upper crossbeam is hinged to the same bucket body via two front-to-back support rods, which are connected by support ribs. This preferred design, through the inclusion of support ribs, enhances the connection strength between the two support rods while further ensuring their synchronous movement.

[0015] The beneficial effects of this utility model are as follows: A gap exists between the lower sliding wheel and the lower pin. When the opening and closing wire rope tilts during the lifting process and the bucket closes to grab material, the slight slippage of the lower sliding wheel can reduce the tilt angle, preventing the wire rope from going out of its groove and breaking due to a large tilt angle. Simultaneously, the lower sliding wheel does not use bearings, avoiding damage due to bearing corrosion. The drainage holes improve the efficiency of draining water accumulated inside the grab bucket when it closes. The wear-resistant liner enhances the wear resistance of the bucket. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the sliding wheel section; As shown in the figure: 1. Hanging device; 2. Upper crossbeam frame; 3. Support tie rod; 4. Lower crossbeam frame; 5. Bucket body; 6. Lower pulley assembly; 7. Wire rope guide wheel; 8. Lower pin shaft; 9. Wear-resistant liner; 10. Drainage hole; 11. Support rib; 13. Copper sleeve; 14. Lower pulley plate. Detailed Implementation

[0017] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0018] See attached document Figure 1-3 This utility model discloses a self-adjusting drainage grab bucket, comprising two bucket bodies arranged opposite each other and side-by-side. The openings of the two bucket bodies are positioned opposite each other. A lower crossbeam is provided at the upper end of each bucket body, and a lower rotating shaft is connected to the upper shaft of the lower crossbeam. The top ends of both bucket bodies are fixed to the lower rotating shaft. An upper crossbeam is also provided at the upper end of the lower crossbeam, and two downwardly extending and side-by-side support rod assemblies are connected to the upper shaft of the upper crossbeam. The two bucket bodies are located between the two sets of support rod assemblies. Each support rod assembly includes two support rods arranged front-to-back and support ribs connecting the two support rods on the same side, with the support ribs forming a star shape. The left support rod is hinged to the end of the left bucket body furthest from the right bucket body, and the right support rod is hinged to the end of the right bucket body furthest from the left bucket body.

[0019] The top of the upper cross frame is hinged with a hanging device, which drives the upper cross frame to move up and down. The upper cross frame is equipped with an upper pulley block, and the lower cross frame is equipped with a lower pulley block. The upper cross frame is also equipped with a wire rope guide pulley. The main pulley block includes the lower pulley block and the upper pulley block. The main pulley block is existing technology and is used in, for example, four-rope light grab buckets and double-rope grab buckets. All of the above mechanisms are existing technology.

[0020] In this design, the lower pulley assembly includes a lower pin mounted on the lower crossbeam, and several lower pulley pieces arranged sequentially along the axial direction of the lower pin. A copper sleeve is fixedly connected to the through hole of each lower pulley piece, and the copper sleeve has a through hole for the lower pin to pass through. The inner diameter of the copper sleeve is larger than the outer diameter of the lower pin. The upper pulley assembly includes an upper pin mounted on the upper crossbeam, and several upper pulley pieces arranged sequentially along the axial direction of the upper pin. A copper sleeve is fixedly connected to the through hole of each upper pulley piece, and the copper sleeve has a through hole for the upper pin to pass through. The inner diameter of the copper sleeve is larger than the outer diameter of the upper pin.

[0021] The thickness of the gap between the copper sleeve and the lower and upper pins is 0.01-0.05 mm. Drainage holes are provided on the side of the bucket body. Wear-resistant liners are installed at the bottom of the bucket body.

[0022] In use, this invention creates a gap between the lower sliding wheel and the lower pin. When the opening and closing wire rope tilts during the lifting process and the bucket closes to grab material, the slight slippage of the lower sliding wheel can reduce the tilt angle, preventing the wire rope from going out of its groove and breaking due to a large tilt angle. Simultaneously, the lower sliding wheel does not use bearings, avoiding damage due to bearing corrosion. The drainage holes improve the efficiency of draining water accumulated inside the grab bucket when it closes. The wear-resistant liner enhances the wear resistance of the bucket.

[0023] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A self-adjusting drainage grab bucket, comprising two oppositely arranged bucket bodies, an upper crossbeam hinged to the bucket bodies via a support rod, and a lower crossbeam located at the lower end of the upper crossbeam and hinged to the two bucket bodies, wherein the upper crossbeam is provided with an upper pulley assembly, and the lower crossbeam is provided with a lower pulley assembly, characterized in that: The sliding wheel assembly includes a lower pin shaft mounted on the lower crossbeam, and several sliding wheel pieces arranged sequentially along the axial direction of the lower pin shaft. The sliding wheel pieces are provided with through holes for the lower pin shaft to pass through, and the diameter of the through holes is larger than the diameter of the lower pin shaft.

2. The self-adjusting drainage grab bucket of claim 1, wherein: A copper sleeve is fixedly connected inside the perforation of the lower sliding wheel, and the inner diameter of the copper sleeve is larger than the outer diameter of the lower pin.

3. The self-adjusting drainage grab bucket of claim 2, wherein: The upper pulley assembly includes an upper pin shaft mounted on an upper crossbeam, and several upper pulley plates arranged sequentially along the axial direction of the upper pin shaft. Each upper pulley plate has a through hole for the upper pin shaft to pass through. The diameter of the through hole is larger than the diameter of the upper pin shaft. A copper sleeve is also fixed inside the through hole of the upper pulley plate. The inner diameter of the copper sleeve is larger than the outer diameter of the upper pin shaft.

4. A self-adjusting drainage grab according to claim 2 or 3, characterised in that: The gap thickness between the copper sleeve and the lower pin is 0.01mm-0.05mm.

5. The self-adjusting drainage grab bucket of claim 1 or 3, wherein: The bucket body has drainage holes on its side.

6. The self-adjusting drainage grab bucket of claim 1 or 3, wherein: The bottom of the bucket is fitted with a wear-resistant liner.

7. The self-adjusting drainage grab bucket of claim 1 or 3, wherein: The upper crossbar is hinged to the same bucket body by two front and rear arranged support rods, and these two support rods are connected by support ribs.

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