Gravel aggregate rapid screening device of excavator

Abstract

A gravel aggregate rapid screening device of an excavator comprises an excavator body, a large arm is hinged to the excavator body, a small arm is hinged to one end of the large arm, an oil cylinder is hinged to the small arm, an excavator bucket is hinged to one end of the small arm and one end of the oil cylinder, a screen plate is arranged in the excavator bucket, a plurality of screen holes are formed in the screen plate, and the screen holes are communicated with the excavator body. An inner cavity of the excavator bucket is divided into a feeding cavity and a screening cavity through the screening plate, a discharging opening is formed in the bottom, located on one side of the screening cavity, of the excavator bucket, a cleaning mechanism is arranged on one side, located on the screening cavity, of the excavator bucket, and the cleaning mechanism is matched with screening holes in the screening plate. The excavator bucket descends to impact the ground, the push plate at the bottom of the excavator bucket firstly touches the ground, the insertion blocks on the connecting plate are inserted into the screen holes, the gravel aggregates clamped in the screen holes are pushed out, the clamped gravel aggregates are cleaned, labor is saved, the labor intensity of workers is effectively relieved, the cleaning speed is high, and the cleaning efficiency is high.

Description

Technical Field

[0001] The utility model relates to an excavator, in particular to a sand and gravel aggregate rapid screening device of the excavator, belonging to the technical field of civil engineering. Background Art

[0002] Excavators are essential tools for civil engineering projects. Ordinary excavators are equipped with conventional buckets, and their primary function is to excavate and load earth and rock from sites. However, some current earthwork projects require on-site screening of the excavated earth and rock. Only gravel and sand aggregates exceeding particle size standards are removed, and the remaining fine soil is backfilled on-site. This requirement is unattainable with ordinary excavators, requiring the use of buckets equipped with screening functions and sieve holes.

[0003] When an existing bucket with a screening function is screening earth and stone, sand and gravel aggregates may be stuck in the sieve holes. At present, the sand and gravel are generally cleaned by manually using tools such as hammers to knock the sand and gravel stuck in the sieve holes. Cleaning is not only very labor-intensive, but also takes a long time, resulting in low cleaning efficiency. Summary of the Invention

[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a sand and gravel aggregate rapid screening device for an excavator that can quickly screen sand and gravel aggregates, facilitate the cleaning of sand and gravel aggregates stuck in the sieve holes, reduce the labor intensity of workers, and improve the cleaning efficiency.

[0005] The utility model discloses a technical solution for a rapid screening device for sand and gravel aggregates of an excavator: it comprises an excavator body, a large arm is hinged on the excavator body, a small arm is hinged on one end of the large arm, an oil cylinder is hinged on the small arm, a bucket is hinged together with one end of the small arm and the oil cylinder, a sieve plate is provided in the bucket, a plurality of sieve holes are provided in the sieve plate, the sieve plate divides the inner cavity of the bucket into a feed cavity and a screening cavity, a discharge opening is provided at the bottom of the bucket located on one side of the screening cavity, a cleaning mechanism is provided on the side of the bucket located on the screening cavity, and the cleaning mechanism cooperates with the sieve holes in the sieve plate.

[0006] Furthermore, the cleaning mechanism includes two or more through holes opened at the bottom of the bucket on one side of the screening chamber, a connecting rod is provided in each through hole, a connecting plate is provided on the end of the connecting rod close to the screen plate, an insert block is provided on the connecting plate, the insert block corresponds to the sieve hole of the screen plate, and a push plate is provided on the end of the connecting rod away from the screen plate.

[0007] Furthermore, the outer wall of the bottom of the bucket is arc-shaped, the inner wall of the push plate is arc-shaped, and the inner wall of the push plate is adapted to the outer wall of the bottom of the bucket.

[0008] Furthermore, a spring is provided on the outer wall of the connecting rod between the bucket and the push plate.

[0009] The beneficial effect of the sand and gravel aggregate rapid screening device of the utility model for an excavator is that the bucket can be lowered and hit the ground through the cooperation of various components, and the push plate at the bottom of the bucket will first touch the ground. At this time, the bucket is still lowered, and the bucket drives the screen plate to lower, so that the plug blocks on the connecting plate are inserted into the screen holes, and the sand and gravel aggregates stuck in the screen holes are pushed out, and the stuck sand and gravel aggregates are cleaned. This cleaning method not only saves effort and effectively reduces the labor intensity of workers, but also has a fast cleaning speed and high cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural diagram of a sand and gravel aggregate rapid screening device for an excavator according to the utility model;

[0011] Figure 2 It is a cross-sectional schematic diagram of the screen plate and cleaning mechanism installed in the bucket;

[0012] In the accompanying drawings, 1. excavator body; 2. boom; 3. arm; 4. cylinder; 5. bucket; 51. feed chamber; 52. screening chamber; 6. screening plate; 7. screening hole; 8. discharge opening; 9. connecting rod; 10. connecting plate; 11. plug block; 12. push plate; 13. through hole; 14. spring. DETAILED DESCRIPTION

[0013] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The following will further describe the technical solution of the present invention in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

[0014] The utility model relates to a rapid screening device for sand and gravel aggregates of an excavator. Figure 1 — Figure 2 As shown, it includes an excavator body 1, on which a large arm 2 is hinged, one end of the large arm 2 is hinged to a small arm 3, on which an oil cylinder 4 is hinged, and one end of the small arm 3 and the oil cylinder 4 are jointly hinged to a bucket 5, in which a sieve plate 6 is provided, in which a plurality of sieve holes 7 are provided, and the sieve plate 6 divides the inner cavity of the bucket 5 into a feed cavity 51 and a sieve cavity 52, and a discharge opening 8 is provided at the bottom of the bucket 5 on one side of the sieve cavity 52, and a cleaning mechanism is provided on the side of the sieve cavity 52 of the bucket 5, and the cleaning mechanism cooperates with the sieve holes 7 in the sieve plate 6.

[0015] Furthermore, the cleaning mechanism includes two or more through holes 13 opened at the bottom of the bucket 5 on one side of the screening chamber 52, and a connecting rod 9 is provided in each through hole 13. A connecting plate 10 is provided at one end of the connecting rod 9 close to the screen plate 6, and an insert block 11 is provided on the connecting plate 10. The insert block 11 corresponds to the sieve hole 7 of the screen plate 6, and a push plate 12 is provided at the end of the connecting rod 9 away from the screen plate 6.

[0016] Furthermore, the outer wall of the bottom of the bucket 5 is curved, and the inner wall of the push plate 12 is also curved, and the inner wall of the push plate 12 is adapted to the outer wall of the bottom of the bucket 5. Adapting the shape of the inner wall of the push plate 12 to the outer wall of the bottom of the bucket 5 can, on the one hand, reduce the obstruction encountered by the push plate 12 when the bucket 5 is digging earth and stone, and on the other hand, when the push plate 12 is pushed close to the bucket 5, the inner wall of the push plate 12 can fit the outer wall of the bucket 5, making the operation more stable and reliable.

[0017] Furthermore, a spring 14 is provided on the outer wall of the connecting rod 9 between the bucket 5 and the push plate 12. With the spring 14, after the push plate 12 drives the insert block 11 to complete the cleaning of the sand and gravel aggregate in the sieve hole 7, the spring 14 pushes the push plate 12 to enable it to be smoothly reset.

[0018] The utility model discloses a rapid screening device for sand and gravel aggregates of an excavator. When working, the excavator body 1 controls the rotation of the big arm 2, the small arm 3 and the bucket 5 to dig up the earth and stone. At this time, the screen plate 6 in the bucket 5 is in an inclined state. Then, the oil cylinder 4 is quickly extended and retracted to make the bucket 5 vibrate, so that the earth and stone pass through the sieve holes 7 on the sieve plate 6 for screening. The sand and gravel aggregates that meet the standards remain in the bucket 5 on one side of the feed cavity 51, while the smaller sand and gravel aggregates pass through the sieve holes 7 and enter the screening cavity 52 and are discharged from the discharge opening 8, thereby screening the earth and stone. When the sand and gravel aggregates are stuck in the sieve holes 7 and affect the screening effect of the earth and stone, The bucket 5 is driven by the cylinder 4 to rotate and retract inward until the sieve plate 6 in the bucket 5 is horizontally arranged with the ground, and the push plate 12 is facing the ground. Then, with the coordinated activities of the big arm 2, the small arm 3 and the cylinder 4, the bucket 5 is lowered and hits the ground. The push plate 12 at the bottom of the bucket 5 will first touch the ground. At this time, the bucket 5 is still lowered, and the bucket 5 drives the sieve plate 6 to lower, so that the plug 11 on the connecting plate 10 is inserted into the sieve hole 7, and the sand and gravel aggregate stuck in the sieve hole 7 is pushed out, and the stuck sand and gravel aggregate is cleaned. This cleaning method not only saves effort and effectively reduces the labor intensity of workers, but also has a fast cleaning speed and high cleaning efficiency.

Claims

1. A rapid screening device for sand and gravel aggregates of an excavator, comprising an excavator body (1), a boom (2) hinged to the excavator body (1), a small arm (3) hinged to one end of the boom (2), an oil cylinder (4) hinged to the small arm (3), and a bucket (5) hinged to one end of the small arm (3) and the oil cylinder (4), wherein: A sieve plate (6) is provided in the bucket (5), and a plurality of sieve holes (7) are provided in the sieve plate (6). The sieve plate (6) divides the inner cavity of the bucket (5) into a feed cavity (51) and a sieve cavity (52). A discharge opening (8) is provided at the bottom of the bucket (5) on one side of the sieve cavity (52). A cleaning mechanism is provided on the side of the sieve cavity (52) of the bucket (5), and the cleaning mechanism cooperates with the sieve holes (7) in the sieve plate (6).

2. The sand and gravel aggregate rapid screening device for an excavator according to claim 1, characterized in that: The cleaning mechanism includes two or more through holes (13) provided at the bottom of the bucket (5) on one side of the sieve chamber (52), a connecting rod (9) is provided in each through hole (13), a connecting plate (10) is provided at one end of the connecting rod (9) close to the sieve plate (6), an insert (11) is provided on the connecting plate (10), the insert (11) corresponds to the sieve hole (7) of the sieve plate (6), and a push plate (12) is provided at one end of the connecting rod (9) away from the sieve plate (6).

3. The sand and gravel aggregate rapid screening device for an excavator according to claim 2, characterized in that: The outer wall of the bottom of the bucket (5) is arc-shaped, the inner wall of the push plate (12) is arc-shaped, and the inner wall of the push plate (12) is matched with the outer wall of the bottom of the bucket (5).

4. The sand and gravel aggregate rapid screening device for an excavator according to claim 3, characterized in that: A spring (14) is provided on the outer wall of the connecting rod (9) between the bucket (5) and the push plate (12).

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