Strip mine surface soil excavation bucket with screening structure

Abstract

The invention discloses a strip mine surface soil excavation bucket with a screening structure, the strip mine surface soil excavation bucket comprises an excavation screening structure, one side of the excavation screening structure is fixedly provided with an opening and closing adjusting structure, and the excavation screening structure comprises a knocking screening assembly for installing an excavation covering assembly; the knocking and screening assembly comprises a bucket body with a through groove in the rear side, meanwhile, a concave frame with a through groove in the lower portion is fixedly installed on the rear side of the bucket body in a welded mode, a sliding groove facilitating sliding arrangement of opening and closing structure parts is formed in the inner side of the concave frame, and digging shovel teeth are fixedly installed on one side of the bucket body; a groove strip with a sliding groove formed in the inner side is fixedly installed at the bottom of the bucket body in a welded mode, meanwhile, a connecting threaded hole is formed in the upper portion of the inner side of the groove strip, and a matched strip is arranged in the groove strip in a sliding mode through the sliding groove. And the concave frame is arranged, so that the inner side opening and welding fixing effects are achieved.

Description

Technical Field

[0001] This invention relates to the field of bucket technology, specifically to a bucket for excavating surface soil in open-pit mines with a screening structure. Background Technology

[0002] Excavators, also known as excavating machinery, are earthmoving machines that use buckets to excavate materials above or below the machine's bearing surface and load them into transport vehicles or unload them into stockpiles. In recent years, the development of construction machinery has been relatively rapid, and excavators have become one of the most important types of construction machinery in engineering construction and mining excavation. However, existing excavator buckets do not provide better double-sided bucket functionality, which reduces the practicality and work efficiency of excavator buckets. Furthermore, existing excavator buckets do not have screening functions when excavating surface soil, resulting in a limited functionality of excavator buckets. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a bucket for excavating surface soil in open-pit mines with a screening structure. This addresses the issues raised in the background art, such as the inconvenience of providing better double-sided bucket functionality, which reduces the practicality and work efficiency of excavator buckets. Furthermore, the lack of screening functionality in existing excavator buckets for surface soil excavation leads to the limited functionality of excavator buckets.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a bucket for excavating topsoil in open-pit mines with a screening structure, comprising an excavation screening structure, wherein an adjustable opening and closing structure is fixedly installed on one side of the excavation screening structure;

[0005] The excavation screening structure includes a percussion screening component installed on the excavation cover component, and the percussion screening component includes a bucket body with a through groove on the rear side. At the same time, a concave frame with the same through groove is welded and fixedly installed on the rear side of the bucket body. A sliding groove is provided on the inner side of the concave frame to facilitate the sliding of the opening and closing structure components.

[0006] By adopting the above technical solution, the recessed frame serves to open the inner side and fix it by welding.

[0007] Preferably, a digging shovel tooth is fixedly installed on one side of the bucket body, and a grooved strip with a sliding groove on the inner side is welded and fixedly installed on the bottom of the bucket body. At the same time, a connecting threaded hole is opened on the upper inner side of the grooved strip. A matching strip is slidably installed inside the grooved strip through the sliding groove, and another connecting threaded hole is opened through the matching strip. The shovel tooth is welded and fixedly installed at the bottom of the matching strip.

[0008] By adopting the above technical solution, the threaded connection hole is opened to achieve the function of threaded connection and fixation.

[0009] Preferably, the matching strip is fixedly installed with the grooved strip by fixing nuts and connecting threaded holes. The surface of the bucket body is provided with a through hole for easy installation of bearings. A rotating shaft is rotatably installed on the inner side of the bucket body by installing bearings. At the same time, the rotating shaft surface is welded and fixedly installed with digging teeth for easy rotary excavation and screening of the surface soil. A hydraulic rotary motor is fixedly installed at one end of the rotating shaft and is fixedly installed on the surface of the bucket body.

[0010] By adopting the above technical solution, the set digging teeth achieve the function of rotary screening.

[0011] Preferably, a through-hole recess is welded and fixedly installed on the inner side of the bucket body, and an adjusting knocking rod is rotatably installed on the inner side of the through-hole recess via a connecting pin. At the same time, an installation component is welded and fixedly installed on one side of the adjusting knocking rod to facilitate the through connection of one end of a connecting spring. The other end of the connecting spring is installed and connected to one side of the recess via another installation component, and the other installation component is welded and fixed to one side of the recess.

[0012] By adopting the above technical solution, the connecting spring is used to achieve elastic adjustment.

[0013] Preferably, a through-hole groove connecting frame is welded and fixed on the top of the bucket body, and a connecting ear plate is welded and fixed on one side of the through-hole groove connecting frame, while the bottom of the connecting ear plate is welded and fixed to the top of the bucket body.

[0014] By adopting the above technical solution, the connecting ear plate is used to achieve the installation and connection function.

[0015] Preferably, the excavation cover assembly includes another through-hole groove connecting frame welded to one side of the upper part of the bucket body, and one side of the through-hole groove connecting frame is rotatably connected to the upper part of the through-hole arc plate via a connecting pin. At the same time, a conical digging tooth is welded and fixedly installed at the bottom of the through-hole arc plate. An arc-shaped mounting plate is welded and fixedly installed on the upper part of the through-hole arc plate via a connecting column, and another through-hole recessed frame is welded and fixedly installed on the upper part of the arc mounting plate. At the same time, the upper part of the other through-hole recessed frame is also rotatably connected to one end of the double-hole connecting rod via a connecting pin.

[0016] By adopting the above technical solution, the through-hole arc-shaped plate achieves a rotating covering function.

[0017] Preferably, the other end of the double-hole connecting rod is also rotatably connected to one end of the first hydraulic telescopic rod via a connecting pin, and the other end of the first hydraulic telescopic rod is also rotatably connected to the through-hole groove connecting frame via another connecting pin.

[0018] By adopting the above technical solution, the double-hole connecting rod can achieve the function of rotating connection at both ends.

[0019] Preferably, the adjusting opening and closing structure includes a through frame with a screening screen welded and fixed on one side, and a sliding strip welded and fixedly installed on the surface of the through frame. The sliding strip slides through a sliding groove and is disposed inside the concave frame. A second hydraulic telescopic rod is fixedly installed above the through frame, and the second hydraulic telescopic rod is fixedly installed above the bucket body on one side via a connecting block.

[0020] By adopting the above technical solution, the screening and separation function is achieved through the screening mesh.

[0021] Preferably, there are four groove strips, and the groove strips are evenly spaced.

[0022] By adopting the above technical solution, the grooved strip serves to limit the threaded connection on the inner side.

[0023] Preferably, the cross-sectional area of ​​the matching strip is arranged in a cross shape, and each matching strip has 14 shovel teeth below it.

[0024] By adopting the above technical solution, the matching strips are set to achieve the function of fixing the sliding mechanism.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the bucket for excavating topsoil in open-pit mines with a screening structure,

[0026] (1) This case solves the problem that the existing excavator bucket is not convenient to provide better double-sided bucket function by setting up the opening and closing structure, which reduces the practicality and working efficiency of the excavator bucket. When the bucket body excavates the surface soil of the open mine, the second hydraulic telescopic rod is controlled to open the frame. At this time, the surface soil of the open mine excavated inside the bucket body is discharged through the frame, thereby improving the double-sided practicality of the bucket body.

[0027] (2) By setting the opening and closing structure and the knocking screening component, the problem of the existing excavator bucket not having a screening function when digging the surface soil of the mine is solved, which leads to the single function of the excavator bucket. When the bucket body digs the surface soil of the open mine, the hydraulic rotary motor is controlled to run and drive the digging teeth to rotate synchronously under force, thereby screening and separating the surface soil inside the bucket body through the screening screen. At the same time, the surface soil of the open mine is knocked and broken by the digging teeth during the screening process.

[0028] (3) By excavating the screening structure and setting the hammer screening component, the problem of soil adhering to the inner side of the bucket body after excavating soil is solved, which is easy to cause corrosion of the inner side of the bucket body. When the digging teeth are subjected to force and rotate, the adjusting hammer rod is subjected to force and rotates. When the adjusting hammer rod is subjected to force and rotates, the elastic force of the connecting spring is used to hammer the inner wall of the bucket body, thereby knocking off the adhering soil and avoiding soil adhesion.

[0029] (4) By tapping the grooved strip, sliding groove, connecting threaded hole, matching strip and shovel teeth set in the screening component, the problem of the bucket body being able to dig only by the shovel teeth, while the bottom of the bucket body cannot be used for auxiliary digging is solved. When the bucket body digs the soil, the shovel teeth also assist in digging the soil during the digging process. At the same time, the shovel teeth can also assist in digging the soil and play a certain role in digging and loosening the soil when the bucket body is flipped, thereby reducing the resistance when the bucket is digging and ensuring the digging effect as much as possible.

[0030] (5) By using the excavation covering component set in the excavation screening structure, the problem of the bucket body only being able to perform excavation work is solved. When it is necessary to clamp materials, the first hydraulic telescopic rod is controlled to drive the through-hole arc plate to rotate, thereby clamping and transporting materials through the through-hole arc plate and the bucket body, or covering the soil during the screening process to avoid soil and other stones from splashing. Attached Figure Description

[0031] Figure 1 This is a frontal cross-sectional view of the present invention.

[0032] Figure 2 This is a schematic diagram of the excavation and screening structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the bucket body, concave frame, sliding groove, digging shovel teeth, shovel teeth, digging teeth, hydraulic rotary motor, through-hole concave frame, adjusting hammer rod, connecting spring, mounting parts, through-hole groove connecting frame and connecting ear plate of the present invention.

[0034] Figure 4 This is a schematic diagram of the groove strip structure of the present invention;

[0035] Figure 5 This is a schematic diagram of the through groove, concave frame, and sliding groove structure of the present invention;

[0036] Figure 6 This is a schematic diagram of the connection threaded hole and matching strip structure of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the excavation and coverage component of the present invention;

[0038] Figure 8 This is a schematic diagram of the adjustable opening and closing structure of the present invention.

[0039] In the diagram: 1. Excavating and screening structure; 101. Striking and screening component; 1011. Bucket body; 1012. Through slot; 1013. Recessed frame; 1014. Sliding groove; 1015. Excavating shovel teeth; 1016. Grooved strip; 1017. Connecting threaded hole; 1018. Shovel teeth; 1019. Digging teeth; 10110. Hydraulic rotary motor; 10111. Through-hole recessed frame; 10112. Adjusting striking rod; 10113. Connecting spring; 10114. Installation Components; 10115, Through-hole groove connecting frame; 10116, Connecting ear plate; 10117, Matching strip; 10118, Rotating shaft; 102, Excavation cover assembly; 1021, Through-hole arc plate; 1022, Conical digging teeth; 1023, Arc mounting plate; 1024, Double-hole connecting rod; 1025, First hydraulic telescopic rod; 2, Adjustable opening and closing structure; 201, Screening screen; 202, Through frame; 203, Sliding strip; 204, Second hydraulic telescopic rod. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figure 1-8 This invention provides a technical solution: a bucket for excavating topsoil in open-pit mines with a screening structure, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, it includes a digging and screening structure 1, which includes a percussion screening component 101 installed on the digging cover component 102. The percussion screening component 101 includes a bucket body 1011 with a through groove 1012 on the rear side. At the same time, a recessed frame 1013 with the same through groove 1012 on the lower side is welded and fixedly installed on the rear side of the bucket body 1011. A sliding groove 1014 is provided on the inner side of the recessed frame 1013 to facilitate the sliding of the components of the opening and closing structure 2.

[0042] Among them, the bucket body 1011 adopts existing technical components, which effectively welds and fixes the concave frame 1013 and connects the through groove 1012.

[0043] Furthermore, in the above-mentioned scheme, a digging tooth 1015 is fixedly installed on one side of the bucket body 1011, and a grooved strip 1016 with a sliding groove 1014 on the inner side is welded and fixedly installed on the bottom of the bucket body 1011. Four grooved strips 1016 are provided, and they are equidistantly arranged. The presence of four such strips not only demonstrates the practicality of the component installation but also its sliding and matching connection. Furthermore, the equidistant distribution and threaded fixing of the components are also demonstrated. Simultaneously, a connecting threaded hole 1017 is provided on the upper inner side of the grooved strip 1016, allowing the grooved strip 1016 to slide through the sliding groove 1014. The bucket 10117 is equipped with a matching strip 10117, and another threaded hole 1017 is opened through the matching strip 10117. At the same time, the bottom of the matching strip 10117 is welded and fixedly installed with shovel teeth 1018. The cross-sectional area of ​​the matching strip 10117 is arranged in a cross shape, and 14 shovel teeth 1018 are arranged below each matching strip 10117. When the cross-sectional area of ​​the above components is arranged in a cross shape, it effectively demonstrates the sliding matching connection between the above components and the groove strip 1016, and also demonstrates the sliding matching docking between the above components and the groove strip 1016. At the same time, when 14 shovel teeth 1018 are arranged below each matching strip 10117, it effectively facilitates the loosening of the soil at the bottom of the bucket body 1011 and assists in digging.

[0044] Furthermore, in the above scheme, the matching strip 10117 is fixedly installed with the groove strip 1016 through the fixing nut and the connecting threaded hole 1017. The surface of the bucket body 1011 is provided with a through hole for easy installation of bearings. The inner side of the bucket body 1011 is rotatably installed with a rotating shaft 10118 through the installation bearing. At the same time, the surface of the rotating shaft 10118 is welded and fixedly installed with digging teeth 1019 for easy rotary excavation and screening of the surface soil. A hydraulic rotary motor 10110 is fixedly installed at one end of the rotating shaft 10118 and the hydraulic rotary motor 10110 is fixedly installed on the surface of the bucket body 1011.

[0045] Among them, the above-mentioned components constitute a rotary adjustment structure. When the rotary adjustment structure constituted by the above-mentioned components is used, the soil is effectively crushed and rotated for screening. At the same time, the hydraulic rotary motor 10110 adopts existing technical components. When the existing technical components are used, the hydraulic rotary motor 10110 can be effectively and conveniently controlled and driven by the excavator hydraulic drive.

[0046] Furthermore, in the above scheme, a through-hole recess 10111 is welded and fixedly installed on the inner side of the bucket body 1011, and an adjusting knocking rod 10112 is rotatably installed on the inner side of the through-hole recess 10111 via a connecting pin. At the same time, an installation part 10114 is welded and fixedly installed on one side of the adjusting knocking rod 10112 to facilitate the through connection of one end of the connecting spring 10113. The other end of the connecting spring 10113 is installed and connected to one side of the recess 1013 via another installation part 10114, and the other installation part 10114 is welded and fixed to one side of the recess 1013.

[0047] Among them, the above-mentioned components constitute an elastic striking structure, which effectively knocks the adhering soil down when the elastic striking structure is formed by the above-mentioned components. At the same time, the elastic striking structure formed by the above-mentioned components effectively plays an auxiliary role in knocking, vibration and screening.

[0048] Furthermore, in the above scheme, a through-hole groove connecting bracket 10115 is welded and fixed on the upper part of the bucket body 1011, and a connecting ear plate 10116 is welded and fixed on one side of the through-hole groove connecting bracket 10115. At the same time, the bottom of the connecting ear plate 10116 is welded and fixed to the upper part of the bucket body 1011.

[0049] The connecting ear plate 10116 also adopts existing technical components, which effectively facilitates the excavator to install and connect the bucket body 1011.

[0050] like Figure 7 As shown, the excavation cover assembly 102 includes another through-hole groove connecting frame 10115 welded to one side of the upper part of the bucket body 1011. One side of the through-hole groove connecting frame 10115 is rotatably connected to the upper part of the through-hole arc plate 1021 via a connecting pin. At the same time, a conical digging tooth 1022 is welded and fixedly installed at the bottom of the through-hole arc plate 1021. An arc-shaped mounting plate 1023 is welded and fixedly installed on the upper part of the through-hole arc plate 1021 via a connecting column. Another through-hole recess 10111 is welded and fixedly installed on the upper part of the arc mounting plate 1023. At the same time, the upper part of the other through-hole recess 10111 is also rotatably connected to one end of the double-hole connecting rod 1024 via a connecting pin. The other end of the double-hole connecting rod 1024 is also rotatably connected to one end of the first hydraulic telescopic rod 1025 via a connecting pin. The other end of the first hydraulic telescopic rod 1025 is also rotatably connected to the through-hole groove connecting frame 10115 via another connecting pin.

[0051] The aforementioned components constitute a hydraulic drive structure. When the hydraulic drive structure is used, the through-hole arc plate 1021 is effectively rotated and connected, and the bucket body 1011 is assisted in digging the soil and picking up materials.

[0052] like Figure 8As shown, an adjustable opening and closing structure 2 is fixedly installed on one side of the excavating screening structure 1. The adjustable opening and closing structure 2 includes a through frame 202 on one side with a screening screen 201 welded and fixed thereon, and a sliding bar 203 is welded and fixedly installed on the surface of the through frame 202. At the same time, the sliding bar 203 slides through the sliding groove 1014 and is disposed inside the concave frame 1013. A second hydraulic telescopic rod 204 is fixedly installed above the through frame 202, and the second hydraulic telescopic rod 204 is fixedly installed above the bucket body 1011 on one side through a connecting block.

[0053] Among them, the above-mentioned components constitute a drive lifting and adjustment structure. When the drive lifting and adjustment structure composed of the above-mentioned components is used, the lifting and lowering interval of the through frame 202 is effectively changed, thereby facilitating the screening and material handling at the rear of the bucket body 1011 after excavation. At the same time, the second hydraulic telescopic rod 204 also adopts existing technical components, and when the existing technical components are used, the drive lifting and adjustment of the through frame 202 is effectively performed.

[0054] In the above scheme, after the connecting ear plate 10116 is installed and connected to the excavator, the hydraulic rotary motor 10110, the first hydraulic telescopic rod 1025, and the second hydraulic telescopic rod 204 are all connected to the hydraulic drive components of the excavator via hydraulic pipes. This facilitates the excavator's hydraulic control and drive adjustment of the hydraulic rotary motor 10110, the first hydraulic telescopic rod 1025, and the second hydraulic telescopic rod 204. When the digging teeth 1015 at the front and the teeth 1018 at the bottom of the bucket body 1011 are used to loosen and excavate the soil, the soil is excavated into the bucket body 1011. At this time, the first hydraulic telescopic rod 1025 is controlled to operate. When the first hydraulic telescopic rod 1025 operates, it drives the double-hole connecting rod 1024, the through-hole arc plate 1021, and the conical digging teeth 1022 to rotate synchronously under force, thereby covering the soil that has entered the bucket body 1011. After the cover is closed, the hydraulic rotary motor 10110 is operated again. When the hydraulic rotary motor 10110 is operating, it drives the rotating shaft 10118 and the digging teeth 1019 to rotate synchronously under force, thereby breaking up the soil. At this time, the digging teeth 1019 drive the adjusting striking rod 10112 to rotate under force. When the adjusting striking rod 10112 rotates under force, it strikes the inner wall of the bucket body 1011 through the connecting spring 10113, so that the broken soil passes through the screening screen 201 for screening. After the soil is screened, the second hydraulic telescopic rod 204 is operated again to drive the through frame 202 and the sliding bar 203 to move upward along the inner wall of the concave frame 1013, so that the screened stones and other materials can be discharged from the inside of the bucket body 1011 through the concave frame 1013. When it is necessary to clamp the material, the first hydraulic telescopic rod 1025 and the bucket body 1011 work together to clamp and transport the material.

[0055] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0056] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bucket for excavating topsoil in open-pit mines with a screening structure, characterized in that: It includes a digging and screening structure (1), and an adjustable opening and closing structure (2) is fixedly installed on one side of the digging and screening structure (1); The excavation screening structure (1) includes a percussion screening component (101) installed on the excavation cover component (102), and the percussion screening component (101) includes a bucket body (1011) with a through groove (1012) on the rear side. At the same time, a concave frame (1013) with the same through groove (1012) is welded and fixedly installed on the rear side of the bucket body (1011). A sliding groove (1014) is provided on the inner side of the concave frame (1013) to facilitate the sliding of the components of the opening and closing structure (2).

2. The bucket for excavating topsoil in open-pit mines with a screening structure according to claim 1, characterized in that: A digging shovel tooth (1015) is fixedly installed on one side of the bucket body (1011), and a grooved strip (1016) with a sliding groove (1014) on the inner side is welded and fixedly installed at the bottom of the bucket body (1011). At the same time, a connecting threaded hole (1017) is opened on the upper inner side of the grooved strip (1016). A matching strip (10117) is slidably arranged inside the grooved strip (1016) through the sliding groove (1014), and another connecting threaded hole (1017) is opened through the matching strip (10117). At the same time, a shovel tooth (1018) is welded and fixedly installed at the bottom of the matching strip (10117).

3. The bucket for excavating topsoil in open-pit mines with a screening structure according to claim 2, characterized in that: The matching strip (10117) is fixedly installed with the grooved strip (1016) by fixing nuts and connecting threaded holes (1017). The surface of the bucket body (1011) is provided with through holes for easy installation of bearings. The inner side of the bucket body (1011) is rotatably installed with a rotating shaft (10118) by installing bearings. At the same time, the surface of the rotating shaft (10118) is welded and fixedly installed with digging teeth (1019) for easy rotary excavation and screening of the surface soil. A hydraulic rotary motor (10110) is fixedly installed at one end of the rotating shaft (10118), and the hydraulic rotary motor (10110) is fixedly installed on the surface of the bucket body (1011).

4. The bucket for excavating topsoil in open-pit mines with a screening structure according to claim 1, characterized in that: A through-hole recess (10111) is welded and fixedly installed on the inner side of the bucket body (10111), and an adjusting knocking rod (10112) is rotatably installed on the inner side of the through-hole recess (10111) through a connecting pin. At the same time, an installation part (10114) is welded and fixedly installed on one side of the adjusting knocking rod (10112) to facilitate the through connection of one end of the connecting spring (10113). The other end of the connecting spring (10113) is installed and connected to one side of the recess (1013) through another installation part (10114), and the other installation part (10114) is welded and fixed to one side of the recess (1013).

5. The bucket for excavating topsoil in open-pit mines with a screening structure according to claim 1, characterized in that: A through-hole groove connecting frame (10115) is welded and fixed on the top of the bucket body (1011), and a connecting ear plate (10116) is welded and fixed on one side of the through-hole groove connecting frame (10115). At the same time, the bottom of the connecting ear plate (10116) is welded and fixed to the top of the bucket body (1011).

6. The bucket for excavating topsoil in open-pit mines with a screening structure according to claim 1, characterized in that: The excavation cover assembly (102) includes another through-hole groove connecting frame (10115) welded to one side of the upper part of the bucket body (1011). One side of the through-hole groove connecting frame (10115) is rotatably connected to the upper part of the through-hole arc plate (1021) by a connecting pin. At the same time, a conical digging tooth (1022) is welded and fixedly installed at the bottom of the through-hole arc plate (1021). An arc-shaped mounting plate (1023) is welded and fixedly installed on the upper part of the through-hole arc plate (1021) by a connecting column. Another through-hole recess (10111) is welded and fixedly installed on the upper part of the arc-shaped mounting plate (1023). At the same time, the upper part of the other through-hole recess (10111) is also rotatably connected to one end of the double-hole connecting rod (1024) by a connecting pin.

7. The bucket for excavating topsoil in open-pit mines with a screening structure according to claim 6, characterized in that: The other end of the double-hole connecting rod (1024) is also rotatably connected to one end of the first hydraulic telescopic rod (1025) via a connecting pin, and the other end of the first hydraulic telescopic rod (1025) is also rotatably connected to the through-hole groove connecting bracket (10115) via another connecting pin.

8. The bucket for excavating topsoil in open-pit mines with a screening structure according to claim 1, characterized in that: The adjustable opening and closing structure (2) includes a through frame (202) with a screening screen (201) welded and fixed on one side, and a sliding strip (203) welded and fixed on the surface of the through frame (202). The sliding strip (203) slides through the sliding groove (1014) and is disposed inside the concave frame (1013). A second hydraulic telescopic rod (204) is fixedly installed above the through frame (202), and the second hydraulic telescopic rod (204) is fixedly installed above the bucket body (1011) on one side through a connecting block.

9. A bucket for excavating topsoil in open-pit mines with a screening structure according to claim 2, characterized in that: The groove strip (1016) is provided in four sections, and the groove strip (1016) is arranged at equal intervals.

10. A bucket for excavating topsoil in an open-pit mine with a screening structure according to claim 2, characterized in that: The cross-sectional area of ​​the matching strip (10117) is arranged in a cross shape, and 14 shovel teeth (1018) are provided below each matching strip (10117).

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