Vibrating screen machine with good separation effect

Abstract

The invention relates to a vibrating screening machine with a good separation effect, the vibrating screening machine comprises a rack, a vibrating screening box, a first-stage screening plate and a driving assembly for driving aggregate on the first-stage screening plate to move, the first-stage screening plate comprises a mounting frame, a plurality of filtering plates and a driving piece, the mounting frame is arranged on the rack, and the filtering plates are arranged on the mounting frame; the filter plates are distributed in the aggregate conveying direction, form a step shape and are parallel to one another, the filter plates are rotationally connected to the mounting frame, and the driving part is used for driving the filter plates to rotate and throwing the aggregate away from the filter plates; and a plurality of blocking columns for reducing the moving speed of the coarse sand are arranged on the filter plate. The vibrating screening machine has the effects that medium sand and fine sand adhering to coarse sand are reduced, and the coarse sand screening accuracy of the vibrating screening machine is improved.

Description

Technical Field

[0001] The present application relates to the field of vibrating screen machines, and in particular to a vibrating screen machine with good separation effect. Background Art

[0002] Concrete aggregate refers to the granular loose material that acts as a skeleton or filler in concrete, which can be divided into coarse aggregate and fine aggregate; fine aggregate includes natural sand and artificial sand, and fine aggregate is divided into coarse sand, medium sand and fine sand. When producing concrete, the particle grading of fine aggregate in concrete is one of the key technologies. Vibrating screens are often used to screen fine aggregate.

[0003] At present, a Chinese utility model patent with publication number CN215784749U discloses an aggregate vibrating screen, including a processing box and a screening plate, wherein the screening plate is located in the inner cavity of the processing box, and the screening plate divides the inner cavity of the processing box into two compartments, and also includes an ejection mechanism for ejecting the aggregate clamped on the screening plate; the application has the function of improving the screening efficiency of the screening plate.

[0004] Coarse sand, medium sand and fine sand move on the screen plate at the same time under the action of gravity. Since the coarse sand has larger particles, it will push the medium sand and fine sand to move during the separation process, so that some of the fine sand and medium sand will slide out of the screen plate together with the coarse sand. There will still be medium sand and fine sand in the coarse sand that cannot be accurately separated. Summary of the invention

[0005] In order to reduce the adhesion of medium sand and fine sand to coarse sand and improve the accuracy of screening coarse sand by a vibrating screen, the present application provides a vibrating screen with good separation effect.

[0006] The present application provides a vibrating screen machine with good separation effect, which adopts the following technical solution: A vibrating screen machine with good separation effect comprises a frame, a vibrating screen box, a primary screening plate and a driving assembly for driving the movement of aggregate on the primary screening plate, wherein the primary screening plate comprises a mounting frame, a plurality of filter plates and a driving member, wherein the mounting frame is arranged on the frame, the plurality of filter plates are distributed along the transportation direction of the aggregate, the plurality of filter plates form a step shape and are parallel to each other, the filter plate is rotatably connected to the mounting frame, the driving member is used for driving the plurality of filter plates to rotate and make the aggregate separate from the filter plate, and the filter plate is provided with a plurality of blocking columns for slowing down the movement speed of coarse sand.

[0007] By adopting the above technical scheme, fine aggregate enters into the vibrating screen box, and the driving assembly is used to drive the aggregate on the primary screening plate to move. Medium sand and fine sand will pass through the filter screen plate in the first screening plate into the vibrating screen box, and part of the medium sand and fine sand will move with the coarse sand. In this process, the driving member will drive the filter plate to rotate, slowing down the overall movement speed of the fine aggregate, and changing the positional relationship between the coarse sand, medium sand and fine sand, so that more coarse sand can be separated. The coarse sand will hit the blocking column during the movement, further slowing down the movement speed of the coarse sand, speeding up the separation of fine sand and medium sand, improving the fine aggregate separation effect of the vibrating screen machine, and greatly improving the discharge speed of the fine aggregate.

[0008] Optionally, the mounting frame is slidably connected in the vibrating screen box along a vertical direction, the driving assembly is used to drive the mounting frame to move, the driving member includes a plurality of driving gears, a driving rack, a driving spring and a driving block, the driving gear is coaxially arranged with the rotation axis of the filter plate, the driving gear is arranged on the filter plate, the driving rack is slidably connected to the mounting frame along the transportation direction of the aggregate, the driving rack is meshed with the driving gear, the driving block is arranged on the vibrating screen box, and a guiding inclined surface is provided on the driving block to guide the driving rack to move relative to the mounting frame, and the driving spring is used to keep the driving rack in contact with the guiding inclined surface.

[0009] By adopting the above technical scheme, when the filter plate needs to rotate to change the positional relationship among coarse sand, medium sand and fine sand, the driving assembly drives the mounting plate frame to move, and the movement of the mounting plate will change the position of the driving rack and the driving block. Since the driving spring keeps the driving rack against the guiding slope of the driving block, the driving rack moves relative to the mounting frame, and the driving rack drives the driving gear to rotate, and the driving gear drives the filter plate to rotate. The filter plate rotates to throw up the fine aggregate, thereby changing the positional relationship among the coarse sand, medium sand and fine sand, and better separating the coarse sand. The driving assembly can drive the mounting frame to shake while driving the filter plate to rotate through the driving member, thereby improving the effect of separating the coarse sand, medium sand and fine sand.

[0010] Optionally, the driving member further includes a covering plate, and the covering plate is used for covering the driving spring.

[0011] By adopting the above technical solution, the cover plate is used to cover the driving spring. Since the stone will shake in the vibrating screen box and even fall off the filter plate, the cover reduces the contact between the stone and the driving spring, thereby extending the service life of the driving spring and improving the reliability of the vibrating screen machine.

[0012] Optionally, the driving assembly includes a plurality of cams, a plurality of rotating rods and synchronous parts, the plurality of rotating rods are distributed along the transport direction of the aggregate, the plurality of rotating rods are located below the mounting frame, the rotating rods are rotatably connected to the vibrating screen box, the plurality of cams correspond to the plurality of rotating rods one by one, the cams abut against the mounting frame, and the synchronous parts are used to drive the plurality of rotating rods to rotate synchronously.

[0013] By adopting the above technical solution, the synchronous parts drive several rotating rods to rotate simultaneously, the rotating rods drive the cam to rotate, the mounting frame remains in contact with the cam under the action of gravity, and the cam drives the mounting frame to slide on the vibrating screen box during the rotation process. The reciprocating sliding of the mounting frame can realize the movement of the aggregate, and the movement of the mounting frame will also drive the driving parts to move, and the driving parts can drive the filter plate to rotate. The rotation of the filter plate realizes the position change between coarse sand, medium sand and fine sand, so that the aggregate separation is more refined, and the driving component has a simple structure and is easy to operate.

[0014] Optionally, the synchronous parts include a plurality of worm wheels, a worm and a synchronous motor, the plurality of worm wheels correspond one-to-one to the plurality of rotating rods, the worm wheel is arranged on the rotating rod, the worm is rotatably connected to the vibrating screen box, the worm is meshed with the plurality of worm wheels, and the synchronous motor is used to drive the worm to rotate.

[0015] By adopting the above technical solution, the synchronous motor drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the rotating rod to rotate, the rotating rod drives the cam to rotate, and the cam can make the mounting frame slide back and forth vertically to realize the movement of aggregate in the vibrating screen box. The worm gear has a self-locking function and a large transmission ratio, which can better drive the cam to lift the mounting frame.

[0016] Optionally, a secondary screening plate is also provided on the vibrating screen box, and the secondary screening plate includes a sliding frame, a fine screen and a number of return springs. The sliding frame is slidably connected to the vibrating screen box along the vertical direction. The height of the sliding frame is lower than the height of the driving assembly. A number of return springs are used to keep the sliding frame pressed against the cam. The fine screen is arranged on the sliding frame.

[0017] By adopting the above technical scheme, the secondary screening plate is used to distinguish between medium sand and fine sand, the synchronous part drives the rotating rod to rotate, and the rotating rod drives the cam to rotate. Since the cam abuts against the sliding frame, when the cam rotates, the sliding frame overcomes the elastic force of the reset spring and moves, so that the sliding frame moves back and forth, and the sliding frame can separate the medium sand and fine sand that fall on the fine screen, and the fine sand will pass through the fine screen into the vibrating screen box. The secondary screening plate realizes the separation of medium sand and fine sand in the fine aggregate, so that the vibrating screen can separate the coarse sand, medium sand and fine sand respectively.

[0018] Optionally, the secondary screening plate also includes an adjusting member, which includes an adjusting frame, an adjusting rod, an adjusting block, an adjusting screw and an adjusting motor. The adjusting frame is slidably connected to the sliding frame in a vertical direction, the fine screen is arranged on the adjusting frame, the adjusting block is slidably connected to the sliding frame, one end of the adjusting rod is rotatably connected to the adjusting frame, the other end of the adjusting rod is arranged on the adjusting block, the length direction of the adjusting screw is parallel to the length direction of the adjusting block, the adjusting screw is rotatably connected to the sliding frame, and the adjusting motor is used to drive the adjusting screw to rotate.

[0019] By adopting the above technical scheme, since there are always a large number of layered water-absorbing soil mineral components in the sand, there will be a large amount of mixing water, which will cause the fine sand and medium sand to stick together into blocks. The weather has a greater impact on the state of fine sand and medium sand. When the weather is relatively humid, the staff can adjust the distance between the fine screen and the filter plate, change the falling time of the fine sand and medium sand, and reduce the adhesion phenomenon by the gravity impact of the fine sand and medium sand on the fine screen; the staff starts the adjusting motor, the adjusting motor drives the adjusting screw to rotate, the adjusting screw drives the adjusting block to move, the adjusting block drives the adjusting rod to rotate, the adjusting rod drives the adjusting frame to move, and changes the distance between the adjusting frame and the filter plate.

[0020] Optionally, the fine screen is slidably connected to the adjusting frame, and the adjusting frame is provided with a limiting member for limiting the movement of the fine screen relative to the adjusting frame, the limiting member includes a limiting block and a limiting spring, a limiting groove is opened on the fine screen, the limiting block is slidably connected to the adjusting frame, and the limiting spring is used to keep the limiting block engaged with the limiting groove.

[0021] By adopting the above technical solution, since the diameter of fine sand is small and the mesh number of fine sand net is high, the mesh holes of fine screen are easier to be blocked and need to be replaced in time. The staff can remove the fine screen from the adjusting frame by sliding the limiting block, and the limiting block overcomes the elastic force of the limiting spring and detaches from the limiting groove. After replacing the new fine screen, the movement of the fine screen relative to the adjusting frame is limited by the limiting member.

[0022] Optionally, a blocking plate is provided on the adjustment frame, and the blocking plate is used to reduce the contact between the adjustment member and the aggregate.

[0023] By adopting the above technical solution, the blocking plate is used to reduce the contact between the fine sand passing through the fine screen and the adjusting member, thereby increasing the service life of the adjusting member.

[0024] Optionally, the vibrating screen box is rotatably connected to the frame, and an adjusting cylinder for adjusting the angle of the vibrating screen box is provided on the frame, one end of the piston rod of the adjusting cylinder is rotatably connected to the vibrating screen box, and the other end of the adjusting cylinder is rotatably connected to the frame.

[0025] By adopting the above technical solution, the regulating cylinder is used to adjust the contact between the vibrating screen box and the frame, so that the vibrating screen machine can adapt to different working environments and can perform normal vibrating screen operations even when the ground is not level.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The first-level screening plate is divided into several filter plates, and the filter plates are rotatably connected to the mounting frame, which can better screen the coarse sand from the fine aggregate; 2. The secondary screening plate is used to screen medium sand and fine sand; 3. The adjusting piece is used to adjust the distance between the secondary screen plate and the primary screen plate, which can better allow the agglomerated medium sand or fine sand to impact the secondary screen plate under gravity, and better break up the medium sand and fine sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of a vibrating screen machine with good separation effect.

[0028] Figure 2 yes Figure 1 A cross-section of the primary screening plate showing the driving elements.

[0029] Figure 3 Used to show the positional relationship between the primary screen plate, the secondary screen plate and the drive assembly.

[0030] Figure 4 yes Figure 3 Exploded view of the secondary screening plate to show the adjustment parts.

[0031] Figure 5 yes Figure 4 A cross-sectional view of the center adjustment frame showing the restraining member.

[0032] Figure 6 yes Figure 1 Schematic diagram of the structure of the drive component.

[0033] Figure numerals: 1, frame; 2, vibrating screen box; 3, primary screening plate; 31, mounting frame; 32, filter plate; 33, driving member; 331, driving gear; 332, driving rack; 333, driving spring; 334, driving block; 335, cover plate; 336, guiding inclined plane; 34, blocking column; 4, driving assembly; 41, cam; 42, rotating rod; 43, synchronous member; 431, worm wheel; 432, worm; 433, synchronous motor; 5, secondary screening plate; 51, sliding frame; 52. Fine screen; 521. Limiting slot; 53. Return spring; 54. Adjusting member; 541. Adjusting frame; 542. Adjusting rod; 543. Adjusting block; 544. Adjusting screw; 545. Adjusting motor; 546. Blocking plate; 547. Receiving slot; 6. Adjusting cylinder; 7. Limiting member; 71. Limiting block; 72. Limiting spring; 721. Guide ramp. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 This application is described in further detail.

[0035] The present application discloses a vibrating screen machine with good separation effect. Figure 1 and Figure 2 A vibrating screen machine with good separation effect includes a frame 1, a vibrating screen box 2, a primary screening plate 3, a driving assembly 4, a secondary screening plate 5 and an adjusting cylinder 6. The vibrating screen box 2 is a rectangular parallelepiped, and an opening is arranged on the upper end surface of the vibrating screen box 2, and an opening is arranged on one side wall of the vibrating screen box 2 along the length direction. The vibrating screen box 2 is rotatably connected to the frame 1 along the width direction, and the cylinder body of the adjusting cylinder 6 is rotatably connected to the frame 1, and one end of the piston rod of the adjusting cylinder 6 is rotatably connected to the bottom wall of the vibrating screen box 2. The primary screening plate 3, the driving assembly 4 and the secondary screening plate 5 are all located in the vibrating screen box 2, and the primary screening plate 3, the driving assembly 4 and the secondary screening plate 5 are distributed vertically downward.

[0036] Reference Figure 1 and Figure 2 The primary screening plate 3 includes a mounting frame 31, a plurality of filter plates 32 and a driving member 33. The mounting frame 31 is slidably connected to the inner wall of the vibrating screen box 2 in the vertical direction. The plurality of filter plates 32 are distributed along the length direction of the vibrating screen box 2. The heights of the plurality of filter plates 32 gradually decrease along the moving direction of the aggregate. The plurality of filter plates 32 are distributed in a step-like manner. The plurality of filter plates 32 are parallel to each other. The filter plates 32 are rotatably connected to the inner wall of the vibrating screen box 2 along the width direction of the vibrating screen box 2. A plurality of blocking columns 34 for slowing down the moving speed of coarse sand are fixedly arranged on the upper end surface of the filter plate 32. The blocking columns 34 are distributed along the width direction of the vibrating screen box 2, and the angle between the blocking columns 34 and the filter plates 32 is an obtuse angle.

[0037] Reference Figure 1 and Figure 2The driving member 33 includes a plurality of driving gears 331, a driving rack 332, a plurality of driving springs 333, a driving block 334 and a cover plate 335. The plurality of driving gears 331 correspond to the plurality of filter plates 32 one by one. The driving gear 331 is coaxially arranged with the rotation axis of the filter plate 32. The driving gear 331 is fixedly arranged on the filter plate 32. The length direction of the driving rack 332 is parallel to the length direction of the mounting frame 31. The driving rack 332 is slidably connected to the upper end surface of the mounting frame 31 along the length direction of the mounting frame 31. The driving gear 331 is meshed with the plurality of driving gears 331. The plurality of driving springs 333 are distributed along the width direction of the mounting frame 31. The length of the driving spring 333 is parallel to the length direction of the mounting frame 31, one end of the driving spring 333 is fixedly set on the driving rack 332, and the other end of the driving spring 333 is fixedly set on the mounting frame 31, the driving block 334 is fixedly set on the vibrating screen box 2, and a guiding inclined surface 336 is provided between one end of the driving block 334 facing the driving rack 332 and the lower end surface of the driving block 334, and the driving spring 333 makes the driving rack 332 keep abutting against the guiding inclined surface 336, and the cover plate 335 is parallel to the upper end surface of the mounting frame 31, and the cover plate 335 is fixedly set on the upper end surface of the mounting frame 31, and the cover plate 335 is used to cover the driving spring 333.

[0038] Reference Figure 3 and Figure 4 The second screening plate includes a sliding frame 51, a fine screen 52, a plurality of reset springs 53 and an adjusting member 54. The height of the sliding frame 51 is lower than the height of the first screening plate. The sliding frame 51 is located in the vibrating screen box 2. The sliding frame 51 is slidably connected to the vibrating screen box 2 along the vertical direction. A plurality of reset springs 53 are evenly distributed on the lower end surface of the sliding frame 51. The reset spring 53 is vertically arranged, one end of the reset spring 53 is fixedly arranged on the sliding frame 51, and the other end of the reset spring 53 is fixedly arranged on the vibrating screen box 2.

[0039] Reference Figure 3 and Figure 4The adjusting member 54 includes an adjusting frame 541, a plurality of adjusting rods 542, a plurality of adjusting blocks 543, an adjusting screw 544 and an adjusting motor 545. The adjusting frame 541 is connected to the sliding frame 51 by sliding in the vertical direction. The adjusting frame 541 is located in the sliding frame 51. The adjusting frame 541 is connected to the sliding frame 51 by sliding in the vertical direction. The length direction of the adjusting screw 544 is parallel to the length direction of the sliding frame 51. The adjusting screw 544 is rotatably connected to the sliding frame 51. The adjusting motor 545 is fixedly arranged on the sliding frame 51. The output shaft of the adjusting motor 545 is fixedly connected to one end of the adjusting screw 544. The plurality of adjusting blocks 543 are connected to the adjusting frame 51 by sliding in the vertical direction. The screw 544 is distributed in the length direction, the adjusting block 543 is slidably connected to the sliding frame 51 along the length direction of the adjusting screw 544, the adjusting block 543 is threadedly connected to the adjusting screw 544, a plurality of adjusting rods 542 correspond to a plurality of adjusting blocks 543 one by one, one end of the adjusting rod 542 is rotatably connected to the adjusting block 543, and the other end of the adjusting rod 542 is rotatably connected to the adjusting frame 541, and a blocking plate 546 is provided on the adjusting frame 541, the blocking plate 546 is vertically arranged, and the blocking plate 546 covers the adjusting rod 542, the adjusting block 543, the adjusting screw 544 and the adjusting motor 545 to reduce the contact between fine sand and the adjusting screw 544.

[0040] Reference Figure 4 and Figure 5 The fine screen 52 is slidably connected to the adjusting frame 541 along the length direction of the adjusting frame 541, and a limiting member 7 for limiting the movement of the fine screen 52 is arranged on the adjusting frame 541. The limiting member 7 includes a limiting block 71 and a limiting spring 72. The adjusting frame 541 is provided with a receiving groove 547 along the width direction of the fine screen 52. The limiting block 71 is slidably connected in the receiving groove 547 along a direction perpendicular to the width direction of the adjusting frame 541. The fixed length direction of the limiting spring 72 is parallel to the sliding direction of the limiting block 71. One end of the limiting spring 72 is fixedly arranged at the bottom of the receiving groove 547, and the other end of the limiting spring 72 is fixedly arranged on the limiting block 71. A limiting groove 521 is arranged on the fine screen 52, and the limiting groove 521 is used for clamping with the limiting block 71. A guide inclined surface 721 is arranged at one end of the limiting block 71 away from the fine screen 52 and one end of the limiting block 71 away from the receiving groove 547.

[0041] Reference Figure 1 and Figure 6The driving assembly 4 includes a plurality of cams 41, a plurality of rotating rods 42 and a synchronous member 43. The synchronous member 43 includes a plurality of worm wheels 431, a worm 432 and a synchronous motor 433. The plurality of rotating rods 42 are distributed along the length direction of the vibrating screen box 2. The rotating rods 42 are located between the primary screening plate 3 and the secondary screening plate 5. The rotating rods 42 are rotatably connected to the vibrating screen box 2. The plurality of cams 41 correspond to the plurality of rotating rods 42 one by one. The cams 41 are fixedly arranged on the rotating rods 42. The cams 41 abut against the mounting frame. 31, the cam 41 abuts against the upper end surface of the sliding frame 51, a plurality of worm gears 431 correspond to a plurality of rotating rods 42 one by one, the worm gear 431 is fixedly arranged on one end of the rotating rod 42, the length direction of the worm 432 is parallel to the distribution direction of the rotating rod 42, the worm 432 is rotatably connected to the vibrating screen box 2, the worm 432 is meshed with a plurality of worm gears 431, the synchronous motor 433 is fixedly arranged on the vibrating screen box 2, and the output shaft of the synchronous motor 433 is fixedly connected to one end of the worm 432.

[0042] The implementation principle of a vibrating screen machine with good separation effect in the embodiment of the present application is as follows: the staff first starts the synchronous motor 433, the synchronous motor 433 drives the worm 432 to rotate, the worm 432 drives the worm wheel 431 to rotate, the worm wheel 431 drives the rotating rod 42 to rotate, the rotating rod 42 drives the cam 41 to rotate, the cam 41 will drive the mounting frame 31 and the sliding frame 51 to move back and forth intermittently, the movement of the mounting frame 31 will remove the coarse sand from the aggregate, the movement of the mounting frame 31 will drive the filter plate 32 to move in the vertical direction, and the rack 33 will be driven to rotate. 32 remains in contact with the guiding slope 336. During the movement of the mounting frame 31, the driving rack 332 will move relative to the mounting frame 31, and the driving rack 332 will drive the driving gear 331 to rotate, and the driving gear 331 will drive the filter plate 32 to rotate. The filter plate 32 will throw up the aggregate and change the movement direction of the aggregate. Due to the different masses of coarse sand, medium sand and fine sand, resulting in different inertia, the medium sand and fine sand can be smoothly separated from the coarse sand after separating from the coarse sand. The blocking column 34 can further slow down the movement of the coarse sand, making it easier for the fine sand and medium sand to separate from the coarse sand.

[0043] The medium sand and fine sand enter the secondary screening plate 5, and the adjusting frame 541 moves under the drive of the driving component 4. The adjusting frame 541 will screen the medium sand and fine sand. Since the water content of medium sand and fine sand is easily affected by the weather, when the water content of the medium sand and fine sand is large and in block shape, the staff can change the distance between the fine screen 52 on the adjusting frame 541 and the primary screening plate 3 by adjusting the motor 545. By increasing the falling time of the medium sand and fine sand and increasing the impact force of the fine sand and medium sand hitting the fine sand net, the block-shaped fine sand and medium sand can be crushed and the fine sand can be better filtered.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vibrating screen machine with good separation effect, characterized in that: The invention comprises a frame (1), a vibrating screen box (2), a primary screening plate (3) and a driving assembly (4) for driving the aggregate on the primary screening plate (3) to move. The primary screening plate (3) comprises a mounting frame (31), a plurality of filter plates (32) and a driving member (33). The mounting frame (31) is arranged on the frame (1). The plurality of filter plates (32) are distributed along the transport direction of the aggregate. The plurality of filter plates (32) form a step shape and are parallel to each other. The filter plates (32) are rotatably connected to the mounting frame (31). The driving member (33) is used to drive the plurality of filter plates (32) to rotate and cause the aggregate to be thrown away from the filter plates (32). The filter plates (32) are provided with a plurality of blocking columns (34) for slowing down the moving speed of coarse sand.

2. A vibrating screen machine with good separation effect according to claim 1, characterized in that: The mounting frame (31) is slidably connected in the vibrating screen box (2) along a vertical direction, the driving assembly (4) is used to drive the mounting frame (31) to move, the driving member (33) comprises a plurality of driving gears (331), a driving rack (332), a driving spring (333) and a driving block (334), the driving gear (331) is coaxially arranged with the rotation axis of the filter plate (32), the driving gear (331) is arranged on the filter plate (32), and the driving rack (332) is arranged on the filter plate (32). The driving rack (332) is slidably connected to the mounting frame (31) along the transport direction of the aggregate, the driving rack (332) is meshed with the driving gear (331), the driving block (334) is arranged on the vibrating screen box (2), and the driving block (334) is provided with a guiding inclined surface (336) for guiding the driving rack (332) to move relative to the mounting frame (31), and the driving spring (333) is used to keep the driving rack (332) in contact with the guiding inclined surface (336).

3. A vibrating screen machine with good separation effect according to claim 2, characterized in that: The driving member (33) further comprises a cover plate (335), wherein the cover plate (335) is used to cover the driving spring (333).

4. A vibrating screen machine with good separation effect according to claim 1, characterized in that: The driving assembly (4) comprises a plurality of cams (41), a plurality of rotating rods (42) and a synchronous member (43); the plurality of rotating rods (42) are distributed along the transport direction of aggregates; the plurality of rotating rods (42) are located below the mounting frame (31); the rotating rods (42) are rotatably connected to the vibrating screen box (2); the plurality of cams (41) correspond to the plurality of rotating rods (42) in a one-to-one manner; the cams (41) abut against the mounting frame (31); and the synchronous member (43) is used to drive the plurality of rotating rods (42) to rotate synchronously.

5. A vibrating screen machine with good separation effect according to claim 4, characterized in that: The synchronous component (43) comprises a plurality of worm wheels (431), a worm (432) and a synchronous motor (433); the plurality of worm wheels (431) correspond to the plurality of rotating rods (42) one by one; the worm wheel (431) is arranged on the rotating rod (42); the worm (432) is rotatably connected to the vibrating screen box (2); the worm (432) is meshed with the plurality of worm wheels (431); and the synchronous motor (433) is used to drive the worm (432) to rotate.

6. A vibrating screen machine with good separation effect according to claim 4, characterized in that: The vibrating screen box (2) is also provided with a secondary screening plate (5) for separating medium sand and fine sand. The secondary screening plate (5) comprises a sliding frame (51), a fine screen (52) and a plurality of return springs (53). The sliding frame (51) is connected to the vibrating screen box (2) in a sliding manner in a vertical direction. The height of the sliding frame (51) is lower than the height of the driving assembly (4). The plurality of return springs (53) are used to keep the sliding frame (51) pressed against the cam (41). The fine screen (52) is provided on the sliding frame (51).

7. A vibrating screen machine with good separation effect according to claim 6, characterized in that: The secondary screening plate (5) further comprises an adjusting member (54), the adjusting member (54) comprising an adjusting frame (541), an adjusting rod (542), an adjusting block (543), an adjusting screw (544) and an adjusting motor (545); the adjusting frame (541) is slidably connected to the sliding frame (51) in a vertical direction; the fine screen (52) is arranged on the adjusting frame (541); the adjusting block (543) is slidably connected to the sliding frame (51); one end of the adjusting rod (542) is rotatably connected to the adjusting frame (541); the other end of the adjusting rod (542) is arranged on the adjusting block (543); the length direction of the adjusting screw (544) is parallel to the length direction of the adjusting block (543); the adjusting screw (544) is rotatably connected to the sliding frame (51); and the adjusting motor (545) is used to drive the adjusting screw (544) to rotate.

8. A vibrating screen machine with good separation effect according to claim 7, characterized in that: The fine screen (52) is slidably connected to the adjustment frame (541), and a limiting member (7) is provided on the adjustment frame (541) for limiting the movement of the fine screen (52) relative to the adjustment frame (541). The limiting member (7) includes a limiting block (71) and a limiting spring (72). A limiting groove (521) is provided on the fine screen (52), and the limiting block (71) is slidably connected to the adjustment frame (541). The limiting spring (72) is used to keep the limiting block (71) engaged with the limiting groove (521).

9. A vibrating screen machine with good separation effect according to claim 8, characterized in that: The adjustment frame (541) is provided with a blocking plate (546), and the blocking plate (546) is used to reduce the contact between the adjustment member (54) and the aggregate.

10. A vibrating screen machine with good separation effect according to claim 1, characterized in that: The vibrating screen box (2) is rotatably connected to the frame (1); an adjusting cylinder (6) for adjusting the angle of the vibrating screen box (2) is provided on the frame (1); one end of a piston rod of the adjusting cylinder (6) is rotatably connected to the vibrating screen box (2); and the other end of the adjusting cylinder (6) is rotatably connected to the frame (1).

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