Shell-shaped grab bucket

Abstract

The utility model discloses a shellfish-shaped grab bucket, which relates to the technical field of machinery and comprises two grab bucket frames, side plates on two sides of the two grab bucket frames are connected through a lifting wheel pin shaft, the two grab bucket frames swing around the lifting wheel pin shaft to realize opening or closing of the two grab bucket frames, and a lifting wheel is arranged at the upper ends of the two grab bucket frames. The lifting frame is hinged to the lower end of the lifting pull rod through a lower shaft pin, and the upper end of the lifting pull rod is hinged to the lifting frame through an upper shaft pin; a lifting reel is arranged in the middle of the lifting wheel pin shaft and connected with a steel wire of a crane in a twisted mode, and the two grab bucket frames are controlled to be opened or closed through lifting of the steel wire. And a tooth-shaped auxiliary grabbing plate is arranged at a clamping opening of the two grab bucket frames. The grab bucket can solve the problems that in the prior art, when a grab bucket grabs materials which are prone to adhesion or hardening, the grabbing efficiency is low, and the grabbing quality is not high.

Description

Technical Field

[0001] This utility model relates to the field of loading machinery technology, and in particular to a grab bucket for grabbing and unloading bulk materials. Background Technology

[0002] A clamshell grab is a lifting device that uses the opening and closing of two combined buckets to grab and unload bulk materials. Currently used clamshell grabs have a flat bucket opening and are mainly used for loading and grabbing bulk materials such as ore, coal, slag, sand, and earthwork. However, when used to grab materials that are prone to sticking or hardening, the flat opening of the clamshell grab has a large contact area when lowering the material, which easily compacts these materials under gravity. This results in low grabbing efficiency and poor material quality when using a clamshell grab. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a shell-shaped grab bucket, which can solve the problems of low grabbing efficiency and low quality when grabbing some easily sticky or hardened materials in the existing technology.

[0004] To solve the above problems, the technical solution of this utility model is as follows: This clamshell grab includes two symmetrical grab frames. The side plates on both sides of the two grab frames are connected by a lifting wheel pin. The two grab frames swing around the lifting wheel pin to open or close. At the upper end of the two grab frames, the lower end of the lifting rod is hinged to the upper end of the lifting rod by a lower shaft pin. The upper end of the lifting rod is hinged to the lifting frame by an upper shaft pin. The lifting wheel pin is parallel to each other. The middle part of the lifting wheel pin is a lifting winch, which is connected to the crane's wire rope. The raising and lowering of the wire rope controls the opening or closing of the two grab frames. Toothed auxiliary gripping plates are provided at the clamping point of the two grab frames. During gripping, the gripping plates of the two toothed auxiliary gripping plates are more likely to penetrate the material under the action of gravity. After the grab closes, the gripping teeth of the plates mesh completely and tightly, preventing material leakage and improving gripping efficiency and quality.

[0005] A more specific solution to the above technical solution is that the grab frame is provided with a certain number of drainage holes to facilitate the release of moisture from materials such as slag when grabbing them.

[0006] Furthermore, the toothed auxiliary gripper plate is made of 316L stainless steel.

[0007] Furthermore: the toothed auxiliary gripping plate includes a gripping plate body and gripping teeth; mounting holes are provided on the gripping plate body, and the toothed auxiliary gripping plate is fixed to the clamping opening of the grab bucket frame by bolts through the mounting holes.

[0008] Furthermore: the toothed auxiliary gripping plate includes a gripping plate body and gripping teeth; the gripping plate body is provided with mounting holes, and the upper end of the gripping plate body is provided with a nesting groove, through which the gripping plate body is fitted into the clamping opening of the grab bucket frame, and is fastened with bolts through the mounting holes.

[0009] Furthermore, a locking sleeve is provided at the clamping opening of the grab bucket frame. After the toothed auxiliary grabbing plate is engaged with the locking sleeve, the toothed auxiliary grabbing plate is clamped and fixed at the clamping opening of the grab bucket frame by a fixing screw.

[0010] Furthermore: the toothed auxiliary gripping plate is 1700 mm long, 580 mm wide, and 15 mm thick, with a distance of 380 mm from the root of the gripping tooth to the edge of the gripping plate, a gripping tooth root width of 140 mm, and a total of 12 teeth; the gripping plate body is provided with two rows of 22 mounting holes at intervals, and the diameter of the mounting holes is 20 mm.

[0011] Furthermore: the toothed auxiliary gripping plate is 1700 mm long, 400 mm wide, and 15 mm thick, with a distance of 200 mm from the root of the gripping tooth to the edge of the gripping plate, a gripping tooth root width of 130 mm, and a total of 13 teeth; a row of 6 mounting holes with a diameter of 22 mm are provided on the gripping plate body at intervals.

[0012] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0013] 1. When it is necessary to grab some easily sticky or hardened materials, this utility model can improve the wall breaking ability by installing a removable toothed gripping plate on the clamshell grab bucket, so that the bucket can penetrate the material deeper; when the bucket is closed, the left and right toothed mouths can fully mesh and bite tightly to avoid material leakage and improve grabbing efficiency and quality.

[0014] 2. This utility model can quickly install and remove suitable toothed auxiliary gripping plates according to the different characteristics of the materials being gripped.

[0015] 3. After the easy-to-remove toothed plate is installed, the wear on the working surface of the clamshell grab bucket can be reduced.

[0016] 4. The grab bucket frame of this utility model is provided with a certain number of drainage holes on its frame surface, which facilitates the release of water from the materials when grabbing materials such as water slag. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structural principle of this utility model;

[0018] Figure 2 This is a schematic diagram of a bolt-fixed toothed auxiliary material gripper structure;

[0019] Figure 3This is a schematic diagram of a toothed auxiliary material gripper plate with embedded bolts for fixing.

[0020] Figure 4 This is a schematic diagram of a nested locking toothed auxiliary gripper plate structure;

[0021] Figure 5 This is a schematic diagram of the installation of the locking sleeve and the nested locking toothed auxiliary material gripper plate;

[0022] Figure 6 This is a three-view drawing and a three-dimensional schematic diagram of a nested locking toothed auxiliary gripper plate installed in a locking sleeve.

[0023] The labels in the diagram represent: 1. Grab frame, 2. Toothed auxiliary gripping plate, 2-1. Gripping plate body, 2-2. Mounting hole, 2-3. Gripping teeth of the plate, 2-4. Nesting groove, 2-5. Clamp, 3. Lifting frame, 4. Upper shaft pin, 5. Lifting rod, 6. Lifting wheel pin, 7. Lower shaft pin, 8. Drain hole, 9. Fixing screw, 10. Locking sleeve. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 A clamshell-shaped grab bucket includes two symmetrical grab bucket frames 1. The side plates of the two grab bucket frames 1 are connected by a lifting wheel pin 6. The two grab bucket frames 1 swing around the lifting wheel pin 6, opening or closing between them. At the upper end of the two grab bucket frames 1, a lower shaft pin 7 is hinged to the lower end of a lifting rod 5. The upper end of the lifting rod 5 is hinged to a lifting frame 3 via an upper shaft pin 4. The lifting wheel pin 6 is parallel to all other pins. A lifting winch is located in the middle of the lifting wheel pin 6, and the winch is connected to a crane's wire rope. The raising and lowering of the wire rope controls the opening or closing of the two grab bucket frames. The frame surface of the grab bucket frame 1 is provided with a certain number of drainage holes to facilitate the release of moisture from materials such as slag when grabbing them. A toothed auxiliary gripping plate 2 is provided at the clamping point of the two grab bucket frames 1. The toothed auxiliary gripping plate 2 is made of 316L stainless steel.

[0026] The toothed auxiliary gripping plates 2 set at the clamping openings of the two grab bucket frames 1 are a pair of matching and meshing auxiliary gripping plates. For ease of description, only the toothed auxiliary gripping plate 2 at one side of the clamping opening will be described.

[0027] Depending on the connection and fixing method between the toothed auxiliary gripping plate 2 and the clamping joint of the grab bucket frame, the toothed auxiliary gripping plate 2 can be made into various forms according to the clamping joint of the grab bucket frame 1 and actual needs.

[0028] like Figure 2As shown, the toothed auxiliary gripping plate 2 is bolt-fixed. The toothed auxiliary gripping plate 2 includes a gripping plate body 2-1 and gripping teeth 2-3. Two rows of mounting holes 2-2 are provided on the gripping plate body 2-1. The toothed auxiliary gripping plate 2 is fixed to the clamping opening of the grab bucket frame by bolts through the mounting holes 2-2.

[0029] like Figure 3 As shown, the toothed auxiliary gripping plate 2 is a bolt-fixed type. The toothed auxiliary gripping plate 2 includes a gripping plate body 2-1 and gripping teeth 2-3. A row of mounting holes 2-2 is provided on the gripping plate body 2-1. A nesting groove 2-4 is provided at the upper end of the gripping plate body 2-1. In this embodiment, the nesting groove 2-4 is a wedge-shaped groove with an included angle of 15 degrees. The gripping plate body 2-1 is fitted into the clamping opening of the gripping bucket frame 1 through the nesting groove 2-4 and is fastened with bolts through the mounting holes 2-2.

[0030] like Figure 4 As shown, the toothed auxiliary gripping plate 2 is a nested locking type. The toothed auxiliary gripping plate 2 includes a gripping plate body 2-1 and a gripping tooth 2-3. Multiple handles 2-5 are spaced apart on the upper end of the gripping plate body 2-1. In this embodiment, five handles 2-5 are provided.

[0031] like Figure 5 and Figure 6 As shown, a number of locking sleeves 10 are provided at intervals on the outer side of the clamping opening of the grab bucket frame 1, corresponding to the locking handles 2-5 of the nested locking toothed auxiliary grab plate 2. The locking sleeves 10 are welded to the outer side of the clamping opening of the grab bucket frame 1 at the positions corresponding to the handles 2-5. The locking sleeve 10 is a flat groove with protrusions on both sides. A fixing screw 9 is provided on one of the protrusions. After the toothed auxiliary grab plate 2 is locked into the groove of the locking sleeve 10 through the handles 2-5, the toothed auxiliary grab plate 2 is locked and fixed at the clamping opening of the grab bucket frame 1 by tightening the fixing screw 9.

[0032] The toothed auxiliary gripping plate 2 can also be quickly fixed to the clamping opening of the grab bucket frame in other different ways. During gripping, the gripping teeth 2-3 of the two toothed auxiliary gripping plates 2 mesh completely and tightly, preventing material leakage and improving gripping efficiency and quality. The entire toothed auxiliary gripping plate 2 is selected in different sizes and materials according to the different clamping opening dimensions of the grab bucket frame 1. This embodiment is as follows... Figure 2 As shown, the toothed auxiliary gripping plate 2 is 1700 mm long, 580 mm wide, and 15 mm thick. The distance from the root of the gripping tooth to the edge of the gripping plate is 380 mm, the root of the gripping tooth is 140 mm wide, and a total of 12 teeth are provided. Two rows of 22 mounting holes 2-2 are provided on the gripping plate body 2-1 at intervals. The diameter of the mounting holes 2-2 is 20 mm.

[0033] This second embodiment is as follows: Figure 3As shown, the toothed auxiliary gripping plate 2 is 1700 mm long, 400 mm wide, and 15 mm thick. The distance from the root of the gripping tooth to the edge of the gripping plate is 200 mm, the root of the gripping tooth is 130 mm wide, and a total of 13 teeth are provided. A row of 6 mounting holes with a diameter of 22 mm is provided on the gripping plate body 2-1 at intervals.

[0034] This embodiment three is as follows Figures 4 to 6 As shown in the figure, the length of the toothed auxiliary gripper plate 2 is 1700 mm; other dimensions are detailed below. Figure 5 and Figure 6 .

[0035] When grabbing materials that are easy to stick or harden, the detachable toothed grab plate of this utility model can improve the wall breaking ability, allowing the bucket to penetrate deeper into the material; when the bucket is closed, the left and right toothed mouths can fully mesh and bite tightly to avoid material leakage, thereby improving grabbing efficiency and quality.

Claims

1. A clamshell-shaped grab bucket, comprising two grab bucket frames (1), the side plates on both sides of the two grab bucket frames (1) being connected by a lifting wheel pin (6), the two grab bucket frames (1) swinging around the lifting wheel pin (6) to open or close between the two grab bucket frames (1), the upper ends of the two grab bucket frames (1) being hinged to the lower end of a lifting rod (5) by a lower shaft pin (7), the upper end of the lifting rod (5) being hinged to a lifting frame (3) by an upper shaft pin (4); the middle part of the lifting wheel pin (6) is a lifting winch, the lifting winch being connected to a crane wire, the lifting and lowering of the wire controlling the opening or closing between the two grab bucket frames; characterized in that: Toothed auxiliary gripping plates (2) are provided at the clamping points of the two grab bucket frames (1).

2. A clamshell grab according to claim 1, characterized in that: The grab bucket frame (1) has drainage holes on its frame surface.

3. A clamshell grab according to claim 1 or 2, characterized in that: The toothed auxiliary gripper plate (2) is made of 316L stainless steel.

4. A clamshell grab according to claim 3, characterized in that: The toothed auxiliary gripping plate (2) includes a gripping plate body (2-1) and gripping teeth (2-3); a mounting hole (2-2) is provided on the gripping plate body (2-1), and the toothed auxiliary gripping plate (2) is fixed to the clamping opening of the grab bucket frame (1) by bolts through the mounting hole (2-2).

5. A clamshell grab according to claim 3, characterized in that: The toothed auxiliary gripping plate (2) includes a gripping plate body (2-1) and gripping teeth (2-3); a mounting hole (2-2) is provided on the gripping plate body (2-1), and a nesting groove (2-4) is provided at the upper end of the gripping plate body (2-1). The gripping plate body (2-1) is fitted into the clamping opening of the gripping bucket frame (1) through the nesting groove (2-4), and is fastened with bolts through the mounting hole (2-2).

6. A clamshell grab according to claim 3, characterized in that: A locking sleeve (10) is provided at the clamping opening of the grab bucket frame (1). After the toothed auxiliary grab plate (2) is engaged with the locking sleeve (10), the toothed auxiliary grab plate (2) is clamped and fixed at the clamping opening of the grab bucket frame (1) by the fixing screw (9).

7. A clamshell grab according to claim 4, characterized in that: The toothed auxiliary gripping plate (2) is 1700 mm long, 580 mm wide, and 15 mm thick. The distance from the root of the gripping tooth to the edge of the gripping plate is 380 mm, the root of the gripping tooth is 140 mm wide, and a total of 12 teeth are provided. Two rows of 22 mounting holes (2-2) are provided on the gripping plate body (2-1) at intervals. The diameter of the mounting holes (2-2) is 20 mm.

8. A clamshell grab according to claim 5, characterized in that: The toothed auxiliary gripping plate (2) is 1700 mm long, 400 mm wide, and 15 mm thick. The distance from the root of the gripping tooth to the edge of the gripping plate is 200 mm, and the root of the gripping tooth is 130 mm wide. A total of 13 teeth are provided. A row of 6 mounting holes are provided on the gripping plate body (2-1) at intervals. The diameter of the mounting holes is 22 mm.

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