Earth and stone screening device

Abstract

The utility model relates to an earth and stone screening device which comprises an excavator bucket frame, a screen drum with an opening in the front side is rotatably arranged in the excavator bucket frame, an outer cleaning mechanism tightly attached to the outer wall of the screen drum and an inner cleaning mechanism extending into the screen drum are arranged on the excavator bucket frame, and the outer cleaning mechanism comprises a supporting frame and an outer scraper blade. A long groove parallel to the axis of the screen drum is formed in the side, close to the screen drum, of the supporting frame, an outer scraping plate is arranged in the long groove in a hinged mode, a plurality of springs are arranged on the two opposite side walls of the long groove in the length direction respectively, and the two ends of each spring are connected with the inner wall of the long groove and the side wall of the outer scraping plate respectively. The inner cleaning mechanism comprises an inner scraping plate close to the inner wall of the screen drum, and the front end of the inner scraping plate extends out of the screen drum and is connected to the excavator bucket frame. And due to the design of an outer scraping plate of the outer cleaning mechanism and an inner scraping plate of the inner cleaning mechanism, the problem that a screen is blocked due to humidity of earth and stones is effectively solved, and continuity and high efficiency of the screening process are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to earthwork screening technical field especially relates to a kind of earthwork screening devices. BACKGROUND

[0002] Earthwork screening in civil engineering is an important link to ensure the quality of construction materials, however, there are significant limitations in the process of prior art. Prior art usually relies on excavator or loader to shovel earthwork and transfer to screening machine, this operation process is not only cumbersome, and with the progress of the project, screening machine needs to be moved frequently, leading to the inconvenience of operation and the reduction of efficiency. In addition, earthwork often contains high humidity, which makes the material adhere to the screen during screening process, forming blockage, significantly affecting the screening efficiency and the continuous operation ability of equipment.

[0003] Therefore, there is an urgent need for an earthwork screening device that can improve screening efficiency and reduce screen clogging to ensure the stability of screening effect. SUMMARY

[0004] In order to overcome the inconvenience of using existing earthwork screening device, and the screen clogging caused by material humidity, the technical problem to be solved is to provide an earthwork screening device which simplifies the screening steps, reduces the frequent movement of equipment, and effectively reduces the clogging of screen.

[0005] The technical scheme is: an earthwork screening device, comprising a bucket frame, a front open screen cylinder is rotatably arranged in the bucket frame, an outer cleaning mechanism abutting against the outer wall of the screen cylinder is arranged on the bucket frame, and an inner cleaning mechanism extending into the screen cylinder is arranged, the outer cleaning mechanism comprises a support frame and an outer scraper, a long slot parallel to the axis of the screen cylinder is formed on one side of the support frame close to the screen cylinder, the outer scraper is hingedly arranged in the long slot, a plurality of springs are arranged on the opposite side walls of the long slot along the length direction, and the two ends of the spring are connected with the inner wall of the long slot and the side wall of the outer scraper respectively, the inner cleaning mechanism comprises an inner scraper close to the inner wall of the screen cylinder, and the front end of the inner scraper extends outwardly to the screen cylinder and is connected to the bucket frame.

[0006] Further, the front end of the inner scraper forms a sleeve part perpendicular to the length direction of the inner scraper, a shaft part is sleeved in the sleeve part, and a tension spring is arranged between the sleeve part and the shaft part.

[0007] Further, a bearing is sleeved at the rear end of the screen cylinder, and a sleeve shaft is sleeved at the front end, the outer ring of the bearing is fixedly connected with the bucket frame, a radially recessed wheel groove is formed in the sleeve shaft, a plurality of abutting wheels are arranged on the sleeve shaft in the circumferential direction, the wheel shaft of the abutting wheel is rotatably connected with the bucket frame, and the wheel surface of the abutting wheel is embedded in the wheel groove and in contact with the wheel groove.

[0008] Further, the screen drum further comprises a driving motor, the driving motor is installed at the rear end of the bucket frame, the bottom of the screen drum is provided with a rotating shaft, and the rotating shaft is in transmission connection with the driving motor.

[0009] Further, the screen drum is a sandwich structure, and a screen mesh can be installed in the sandwich.

[0010] Further, an arc-shaped transition surface is formed between the front bucket tooth of the bucket frame and the screen drum.

[0011] Further, the bucket tooth and the bucket frame are detachably connected through bolts.

[0012] Further, the screen drum is in a cylindrical shape, a conical shape or a double-conical shape.

[0013] Beneficial effects are as follows: 1. The local earthwork screening device realizes integrated screening operation by arranging the rotating screen drum in the bucket frame, avoids the cumbersome steps of frequent movement of the traditional equipment, and effectively prevents the screen mesh from being blocked due to humidity through the design of the outer scraper of the outer cleaning mechanism and the inner scraper of the inner cleaning mechanism, thereby ensuring the continuity and efficiency of the screening process. In addition, the spring support structure of the outer scraper enhances the adaptability and cleaning effect of the equipment.

[0014] 2. The bearing is arranged at the rear end of the screen drum, and the sleeve shaft and the wheel groove are arranged at the front end of the screen drum, thereby enhancing the stability and rotation precision of the screen drum.

[0015] 3. The screen drum with the sandwich structure enables screen meshes of different types and specifications to be conveniently installed in the sandwich, thereby adapting to different screening requirements, improving the multifunctionality of the equipment, and enabling the screen mesh to be replaced according to specific engineering requirements, thereby improving the adaptability and efficiency of the earthwork screening.

[0016] 4. The arc-shaped transition surface formed between the bucket tooth and the screen drum optimizes the feeding path of the earthwork material, and reduces the possibility of material jamming and blocking.

[0017] 5. The detachable connection of the bucket tooth and the bucket frame makes the equipment maintenance and component replacement more convenient and fast. DETAILED DESCRIPTION

[0018] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0019] Figure 2 It is a three-dimensional structure schematic view of the outer cleaning mechanism of the utility model.

[0020] Figure 3 It is an exploded view of the inner cleaning mechanism of the utility model, wherein the pipe part is longitudinally cut.

[0021] Figure 4 It is the structural diagram of the bearing, sleeve shaft and wheel groove and abutting wheel of the utility model.

[0022] Figure 5 It is the structural diagram of the screen cylinder installing screen of the utility model sandwich structure.

[0023] The names and serial numbers of parts in the figure are as follows: 1_digging frame, 2_screen cylinder, 21_driving motor, 3_outer cleaning mechanism, 31_support frame, 32_outer scraper, 33_long slot, 34_spring, 4_inner cleaning mechanism, 41_inner scraper, 42_tube, 43_shank, 44_tension spring, 5_bearing, 6_sleeve shaft, 61_wheel groove, 7_abutting wheel, 8_screen, 9_arc transition surface, 10_bolt. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] As shown in Figure 1 and Figure 2 The earthwork screening device comprises a digging frame 1, a screen cylinder 2 and inner and outer cleaning mechanisms. The front side of the screen cylinder 2 is open, the side wall and the bottom wall are provided with screen holes, and the shape of the screen cylinder 2 can be cylindrical, conical or double-conical. The cylindrical structure is shown in the figure. The screen cylinder 2 is rotatably installed in the digging frame 1. The digging frame 1 is installed at the front end of the small arm of a shovel (not shown in the figure) to replace the conventional bucket. When the front shovel of the digging frame 1 is lowered to dig, the dug earthwork enters the screen cylinder 2 along the open front side of the screen cylinder 2, and the screen cylinder 2 rotates to realize the screening operation. In this way, the earthwork can be screened while being dug, the step of transferring the earthwork is reduced, and the screening efficiency is improved. In addition, the outer cleaning mechanism 3 and the inner cleaning mechanism 4 are arranged on the digging frame 1. The outer cleaning mechanism 3 is close to the outer wall of the screen cylinder 2. The outer cleaning mechanism 3 specifically comprises a support frame 31 and an outer scraper 32. The side of the support frame 31 close to the screen cylinder 2 is provided with a long slot 33 parallel to the axis of the screen cylinder 2. The outer scraper 32 is hingedly arranged in the long slot 33. A plurality of springs 34 are arranged on the opposite side walls of the long slot 33 along the length direction. The two ends of the spring 34 are connected with the inner wall of the long slot 33 and the side wall of the outer scraper 32 respectively. The outer cleaning mechanism 3 extends into the screen cylinder 2 close to the inner wall of the screen cylinder 2.

[0026] With the rotation of the screen cylinder 2, some earthwork with a size comparable to the screen hole or higher viscosity will adhere to the inner and outer walls of the screen cylinder 2, blocking the screen hole. By setting the outer cleaning mechanism 3 and the inner cleaning mechanism 4, the adhering material can be cleaned. In addition, the outer scraper 32 is connected to the support frame 31 by hinging, and cooperates with the spring 34 to enhance its adaptability and prevent damage.

[0027] As shown in Figure 3 , the inner cleaning mechanism 4 specifically includes an inner scraper 41 close to the inner wall of the screen cylinder 2, the front end of the inner scraper 41 extends outwardly to the screen cylinder 2 and is connected to the excavator frame 1. Similarly, in order to enhance the adaptability of the inner scraper 41, a sleeve portion 42 perpendicular to the length direction of the inner scraper 41 is formed at the front end of the inner scraper 41, and a shaft portion 43 is sleeved in the sleeve portion 42, and a tension spring 44 is arranged between the two. Similarly, when encountering earthwork with strong adhesion or tight clamping, in order to avoid damage to the inner scraper 41, the above structure is designed, which can achieve the purpose of buffering through the extension and retraction movement and the action of the tension spring when encountering hard collision.

[0028] As shown in Figure 4 , in one specific embodiment, the specific installation structure of the screen cylinder 2 is as follows: the rear end of the screen cylinder 2 is sleeved with a bearing 5, the inner ring of the bearing 5 is fixedly connected with the screen cylinder 2, the outer ring of the bearing 5 is fixedly connected with the excavator frame 1, and the front end of the screen cylinder 2 is sleeved with a sleeve shaft 6, the sleeve shaft 6 is provided with a radially recessed wheel groove 61, and a plurality of abutting wheels 7 are arranged on the sleeve shaft 6 in the circumferential direction of the excavator frame 1. In this embodiment, four abutting wheels 7 are provided, the wheel shafts of the abutting wheels 7 are rotatably connected with the excavator frame 1, and the wheel surfaces of the abutting wheels 7 are embedded in the wheel groove 61 and in contact with the wheel groove 61. Through the structure of the bearing 5, the wheel groove 61 and the abutting wheel 7, on the one hand, the stability of the screen cylinder 2 is enhanced, and on the other hand, the expandability of the screen cylinder 2 is enhanced. More specifically, the screen cylinder 2 further comprises a driving motor 21, the driving motor 21 is installed at the rear end of the excavator frame 1, and the bottom of the screen cylinder 2 is provided with a rotating shaft, the rotating shaft is in transmission connection with the driving motor 21.

[0029] As shown in Figure 5 , in order to adapt the device to a wider environment, the inventor designs the screen cylinder 2 as a sandwich structure, and a screen mesh 8 can be installed in the sandwich layer. By removing the sleeve shaft 6, different screen meshes with different screen sizes can be replaced, so that more environmental requirements can be met. When dealing with different use environments, the screen cylinder 2 does not need to be disassembled, and the operation is more convenient.

[0030] In order to optimize the feeding path, an arc-shaped transition surface 9 is formed between the front side of the excavator frame 1 and the screen cylinder 2, so that the efficiency of digging earthwork is improved.

[0031] In addition, the teeth of the device and the excavator frame 1 are detachably connected by bolts 10. After the teeth are disassembled, the excavator frame 1 is conveniently removed, and at this time the excavator frame 1 can be used independently as a fixed screening device.

[0032] The above-described embodiments only express the preferred embodiments of the present application, which are described in more detail and in more detail, but cannot be understood as limiting the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications, improvements and substitutions can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A device for earthwork screening, characterized in that, The utility model provides a kind of excavator, including excavator frame (1), the screen cylinder (2) of front side open is rotatably arranged in the excavator frame (1), the outer cleaning mechanism (3) of being close to the outer wall of screen cylinder (2) is arranged on the excavator frame (1), and the inner cleaning mechanism (4) extending to screen cylinder (2) inside, the outer cleaning mechanism (3) includes support frame (31) and outer scraper (32), the long slot (33) parallel to the axis of screen cylinder (2) is opened in the side of support frame (31) close to screen cylinder (2), outer scraper (32) is hingedly arranged in the long slot (33), the opposite two side walls of long slot (33) are provided with a plurality of springs (34) along length direction respectively, the two ends of spring (34) are connected with the inner wall of long slot (33) and the side wall of outer scraper (32) respectively, the inner cleaning mechanism (4) includes inner scraper (41) close to the inner wall of screen cylinder (2), and the front end of inner scraper (41) extends to screen cylinder (2) outside and is connected on excavator frame (1).

2. The earthwork screening device of claim 1, wherein, The front end of the inner scraper (41) forms a sleeve portion (42) perpendicular to the length direction of the inner scraper (41), and the sleeve portion (42) is sleeved with a shaft portion (43), and a tension spring (44) is arranged between the sleeve portion (42) and the shaft portion (43).

3. The earthwork screening device of claim 1, wherein, The rear end of the screen cylinder (2) is sleeved with a bearing (5), and the front end is sleeved with a sleeve shaft (6), the outer ring of the bearing (5) is fixedly connected with the excavator frame (1), a radial recessed wheel groove (61) is formed in the sleeve shaft (6), a plurality of abutting wheels (7) are arranged on the sleeve shaft (6) in the circumferential direction of the sleeve shaft (6), the wheel shaft of the abutting wheel (7) is rotatably connected with the excavator frame (1), and the wheel surface of the abutting wheel (7) is embedded in the wheel groove (61) and in contact with the wheel groove (61).

4. Earthwork screening device according to any one of claims 1-3, characterized in that The screen cylinder (2) further comprises a driving motor (21), the driving motor (21) is installed at the rear end of the excavator frame (1), the bottom of the screen cylinder (2) is provided with a rotating shaft, and the rotating shaft is in driving connection with the driving motor (21).

5. The earthwork screening device of claim 3, wherein, The screen cylinder (2) has a sandwich structure, and a screen (8) can be installed in the sandwich.

6. The earthwork screening device of claim 1, wherein, An arc-shaped transition surface (9) is formed between the front side bucket tooth of the excavator frame (1) and the screen cylinder (2).

7. The earthwork screening device of claim 6, wherein, The front side bucket tooth and the excavator frame (1) are detachably connected by bolts (10).

8. The earthwork screening device of claim 1, wherein, The screen cylinder (2) has a cylindrical shape, a conical shape or a double-conical shape.

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