CN113953177B

CN113953177B - Vibrating screen machine

Info

Publication number: CN113953177B
Application number: CN202111235192.0A
Authority: CN
Inventors: 吴尤东; 严淑芬; 李佳; 吉冠裕
Original assignee: Zhejiang Aili Intelligent Testing Technology Group Co ltd
Current assignee: Zhejiang Aili Intelligent Testing Technology Group Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2023-03-24
Anticipated expiration: 2041-10-22
Also published as: CN113953177A

Abstract

The application relates to the field of material screening, in particular to a vibrating screen machine which comprises a screen frame and screen cloth, wherein horizontal rotating shafts are rotatably connected to four side walls of the screen frame, the positions of the rotating shafts correspond to the positions of lower edges of the screen frame one by one, and the rotating shafts are parallel to the corresponding lower edges; the side wall of the rotating shaft is fixedly connected with a row of contact pins for piercing the screen cloth, and the side wall of the rotating shaft is also provided with a pressing strip for pressing the screen cloth on the lower edge of the screen frame when the contact pins pull the screen cloth outwards; the screen frame is provided with a driving mechanism which drives the contact pins on the four rotating shafts to simultaneously pull the screen cloth outwards. This scheme not only makes the workman select the screen cloth in suitable aperture according to the material of different particle diameters, has effectively promoted the result of use of sieving machine, has still made things convenient for the workman to change the screen cloth greatly.

Description

Vibrating screen machine

Technical Field

The application relates to the field of material screening, especially, relate to a sieving machine.

Background

The vibrating screen machine is a machine for screening out materials with small particle size by frequency vibration. As shown in fig. 5, the vibrating screen machine shown in the figure comprises a frame 1, four upright posts 2 erected on the frame 1, rubber rings 3 fixedly connected to the upright posts 2, a screen frame 4 and screen cloth 5 arranged above the frame 1, a connecting post 6 fixedly connected to the screen frame 4 and horizontally placed between the two rubber rings 3, a main shaft 7 rotatably connected to the screen frame 4 and parallel to the connecting post 6, a cam 8 and a driven wheel 9 fixedly sleeved on the side wall of the main shaft 7, a driving wheel 10 and a motor 11 driving the driving wheel 10 to rotate arranged on the frame 1, and a conveyor belt 12 rotatably sleeved between the driving wheel 10 and the driven wheel 9. After the material is put on screen cloth 5, workman's starter motor 11 drives the action wheel 10 rotatory, under the coordinated action of action wheel 10, follow driving wheel 9 and conveyer belt 12, main shaft 7 on reel 4 will take place rotatoryly, and eccentric swing will take place for cam 8, and reel 4 and screen cloth 5 can regularly take place the vibration, and screen cloth 5 just can sieve the material that the particle diameter is little out fast.

Although the sieving machine in the above-mentioned correlation technique has promoted the screening speed of material, because the screen cloth is the direct bonding of many and fixes on the reel, this means that the workman is difficult to change the screen cloth of different apertures and adapts to the material of different particle sizes, has influenced the result of use of sieving machine greatly.

Disclosure of Invention

For the convenience of the workman change the screen cloth in different apertures and adapt to the material of different particle diameters, promote the result of use of sieving machine, this application provides a sieving machine.

The application provides a sieving machine adopts following technical scheme:

a vibrating screen machine comprises a screen frame and screen cloth, wherein horizontal rotating shafts are rotatably connected to four side walls of the screen frame, the positions of the rotating shafts are in one-to-one correspondence with the positions of lower edges of the screen frame, and the rotating shafts are parallel to the corresponding lower edges; the side wall of the rotating shaft is fixedly connected with a row of contact pins for piercing the screen cloth, and the side wall of the rotating shaft is also provided with a pressing strip for pressing the screen cloth on the lower edge of the screen frame when the contact pins pull the screen cloth outwards; the screen frame is provided with a driving mechanism which drives the contact pins on the four rotating shafts to simultaneously pull the screen cloth outwards.

Through adopting above-mentioned technical scheme, the workman at first selects the sieve cloth in suitable aperture according to the particle diameter of material, then stings the four sides of sieve cloth respectively with four epaxial contact pins of changeing, and rethread actuating mechanism comes four pivots of rotation simultaneously immediately, and the contact pin on the sieve cloth four sides will outwards overturn simultaneously and outwards pull sieve cloth, sieve cloth alright be flattened to ensure the screening effect of sieve cloth. Meanwhile, the pressing strip can be gradually close to the lower edge corresponding to the screen frame along with the rotation of the rotating shaft, and finally the screen cloth is pressed on the lower edge corresponding to the screen frame, so that the peripheral position of the screen cloth is further locked, and meanwhile, the material is ensured not to fall out from a gap between the screen cloth and the screen frame, so that the material can be screened normally, and the screen cloth is replaced successfully. This scheme not only makes the workman select the screen cloth in suitable aperture according to the material of different particle diameters, has effectively promoted the result of use of sieving machine, has still made things convenient for the workman to change the screen cloth greatly.

Preferably, the four corners of the screen frame are fixedly connected with connecting plates for rotatably embedding the end parts of the rotating shafts; the driving mechanism comprises bevel gears which are fixedly sleeved between two adjacent rotating shafts and are meshed with each other, and a driving part which is arranged on one connecting plate and is used for rotating the corresponding rotating shaft.

Through adopting above-mentioned technical scheme, the workman rotates one of them pivot through the driving piece, and under the linkage of four pairs of bevel gears, four pivots will take place the rotation simultaneously, and the contact pin on the sieve cloth four sides just can outwards drag the sieve cloth simultaneously. The driving mechanism is simple and practical in structure, greatly facilitates the operation of workers, and greatly reduces the manufacturing cost of the device.

Preferably, the driving part comprises a worm wheel fixedly sleeved on the side wall of the rotating shaft, a worm rotatably connected to the connecting plate and meshed with the worm wheel, and a handle arranged on the worm.

Through adopting above-mentioned technical scheme, the workman rotates the worm through the handle, and under the combined action of worm and worm wheel, pivot and the bevel gear that corresponds alright take place to rotate, and the simple structure of driving part has made things convenient for the flat screen cloth of workman's exhibition greatly, has effectively reduced the probability that the screen cloth takes place to damage when the exhibition is flat. In addition, the linkage structure of the worm wheel and the worm has the functions of amplifying torque and self-locking, so that the process of flattening the screen cloth by workers is easier, the step of locking the position of the rotating shaft by the workers is also omitted, and convenience is brought to flattening of the screen cloth by the workers.

Preferably, the connecting plate is provided with a protective cover wrapping the bevel gear.

By adopting the technical scheme, the protective cover can effectively prevent foreign objects from contacting the bevel gears, so that the normal linkage between the bevel gears is ensured, and the four rotating shafts can smoothly rotate.

Preferably, a push plate which is the same as the rotating shaft in the length direction is arranged on the side wall of the rotating shaft, and a plurality of through holes for the contact pins to pass through are formed in the push plate; the both ends of push pedal all are equipped with the guide bar the same with push pedal length direction, offer on the connecting plate and supply the guide bar tip to slide to inlay the guide way of establishing, when the contact pin was rotatory towards the center of reel, the guide way can order about guide bar and push pedal and remove towards the direction of keeping away from the pivot, and the push pedal can push the screen cloth to the pointed end of contact pin.

Through adopting above-mentioned technical scheme, when the rotatory pivot of workman made the contact pin revolve to the center of reel, the tensioning effect of contact pin to the screening cloth will be cancelled, meanwhile, guide bar and push pedal can move towards the direction of keeping away from the pivot under the promotion of contact pin and the guide way direction, and the push pedal just can push the most advanced of contact pin to the screening cloth of thorn on the contact pin bit a bit to made things convenient for the follow-up screening cloth of taking away of workman.

Preferably, a limit groove which is the same as the radial direction of the rotating shaft is formed in the rotating shaft, and a limit rod fixedly connected with the push plate is embedded in the limit groove in a sliding mode.

Through adopting above-mentioned technical scheme, spacing groove and gag lever post can restrict the removal orbit of push pedal, make the push pedal only can remove along the radial emergence of pivot, therefore, the removal of push pedal just no longer need realize with the help of the promotion of contact pin, along with the rotation of pivot, under the limiting displacement of spacing groove and gag lever post and the guide effect of guide way, the push pedal alright push the most advanced of contact pin to the screen cloth that stings on the contact pin bit a bit more smoothly, bring the facility for the follow-up screen cloth of taking away of workman.

Preferably, the guide groove has a circular arc shape.

By adopting the technical scheme, the arc-shaped guide groove not only increases the movement track of the guide rod, so that the push plate can slowly and stably push out the sieve cloth, and the probability that the push plate is clamped by the sieve cloth is effectively reduced; the arc-shaped guide groove can also enable the guide rod to move more flexibly, so that the probability of the guide rod being clamped in the guide groove is greatly reduced, and the normal operation of the device is ensured.

Preferably, the side wall of the rotating shaft is provided with an arch strip which is the same as the rotating shaft in the length direction, the arch strip is positioned between the contact pin and the pressing strip, and the shortest distance from each point on the arch strip to the central axis of the rotating shaft is gradually reduced from the center of the rotating shaft to two ends.

Through adopting above-mentioned technical scheme, the in-process that the sieve cloth was outwards dragged by the contact pin, the arch strip will conflict the sieve cloth gradually and make the sieve cloth extend toward the both ends that correspond the pivot to further carried out the exhibition flat to the sieve cloth on the basis of contact pin, this change speed that has not only accelerated the sieve cloth, still promoted the screening effect of sieve cloth simultaneously.

Preferably, the below of reel is equipped with fixed frame, is equipped with many in the fixed frame and is the bracing piece that the downward sloping set up towards the center of fixed frame.

Through adopting above-mentioned technical scheme, the bracing piece on the fixed frame can play the supporting role to the sieve cloth, and this not only is favorable to maintaining the shape of sieve cloth, ensures the screening effect of sieve cloth, has still made things convenient for the workman to insert the four sides of sieve cloth on the contact pin that corresponds simultaneously. In addition, after the screening of material, the large granule material of remaining on the sieve cloth can be gathered together toward the middle zone of many spinal branchs vaulting pole, the central zone of sieve cloth promptly, after the four sides of sieve cloth are no longer inserted to the contact pin, the large granule material will freely fall down from the middle zone of many spinal branchs vaulting pole together with the sieve cloth, the sieve cloth can just wrap up the large granule material simultaneously, this will make things convenient for the workman to handle large granule material and sieve cloth greatly, make more quick and convenient of sieve cloth.

In summary, the present application includes at least one of the following beneficial technical effects:

1. due to the arrangement of the rotating shaft, the contact pin and the driving mechanism, workers can conveniently replace sieve cloths with different apertures to adapt to materials with different particle sizes, and the using effect of the vibrating screen machine is improved;

2. due to the arrangement of the protective cover, normal linkage among the bevel gears is ensured, and the four rotating shafts can smoothly rotate;

3. due to the arrangement of the push plate, the through hole, the guide rod and the guide groove, the sieve cloth stabbed on the contact pin can be pushed to the tip end of the contact pin by the push plate little by little, and the sieve cloth is convenient for workers to take away the sieve cloth subsequently;

4. the arrangement of the limiting groove and the limiting rod enables the push plate to smoothly push the sieve cloth stabbed on the contact pin to the tip end of the contact pin little by little;

5. the arrangement of the arc-shaped guide groove ensures the normal movement of the push plate;

6. the arrangement of the arched strips not only accelerates the replacement speed of the screen cloth, but also improves the screening effect of the screen cloth;

7. the setting of fixed frame and bracing piece, one is favorable to maintaining the shape of sieve cloth, ensures the screening effect of sieve cloth, and two come to make things convenient for the workman to insert the four sides of sieve cloth on the contact pin that corresponds, and three come to make things convenient for the workman to handle large granule material and sieve cloth, make more quick and convenient of sieve cloth.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of a partial cross-sectional structure at a screen frame in an embodiment of the present application;

FIG. 3 is a partial schematic structural view of an end portion of a rotating shaft in the embodiment of the present application;

FIG. 4 is a partial sectional view of the fixing frame in the embodiment of the present application;

fig. 5 is an overall structural diagram of the related art.

Description of reference numerals: 1. a frame; 2. a column; 3. a rubber ring; 4. a screen frame; 5. screening cloth; 6. connecting columns; 7. a main shaft; 8. a cam; 9. a driven wheel; 10. a driving wheel; 11. a motor; 12. a conveyor belt; 13. a connecting plate; 14. a rotating shaft; 15. inserting a pin; 16. layering; 17. a bevel gear; 18. a protective cover; 19. a worm gear; 20. a worm; 21. a handle; 22. an arched strip; 23. pushing the plate; 24. a through hole; 25. a guide bar; 26. a guide groove; 27. a limiting rod; 28. a limiting groove; 29. a fixing frame; 30. a support rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

Referring to fig. 1, the vibrating screen machine comprises a frame 1, upright posts 2 fixedly connected to four corners of the frame 1, rubber rings 3 fixedly connected to the upright posts 2, a rectangular screen frame 4 positioned above the frame 1, screen cloth 5 installed on the screen frame 4 and used for screening materials, and two connecting columns 6 fixedly connected to the screen frame 4, wherein the two connecting columns 6 are respectively positioned at two ends of the screen frame 4, and each connecting column 6 is horizontally suspended between the two rubber rings 3; the utility model provides a sieving machine, still includes to rotate the main shaft 7 that connects on reel 4 and be parallel with spliced pole 6, fixed cover is established at cam 8 and follow driving wheel 9 on the main shaft 7 lateral wall, rotates the motor 11 that connects in frame 1 and be located the action wheel 10 and the rotatory drive wheel 10 of following driving wheel 9 top to and rotate the cover and establish the conveyer belt 12 between action wheel 10 and follow driving wheel 9, motor 11 passes through the electric wire and is connected with the power. After the material is put on screen cloth 5, workman starter motor 11 drives the action wheel 10 rotatory, under action wheel 10, from the coordinated action of driving wheel 9 and conveyer belt 12, main shaft 7 on the reel 4 can take place rotatoryly, and eccentric swing can take place for cam 8, and reel 4 and screen cloth 5 just can regularly take place the vibration, and the material that the particle diameter is little can pass screen cloth 5 and drop, and the material that the particle diameter is big then can be detained on screen cloth 5.

Referring to fig. 1, 2 and 3, four corners of the screen frame 4 are fixedly connected with connecting plates 13, two adjacent connecting plates 13 are rotatably connected with horizontal rotating shafts 14, the positions of the four rotating shafts 14 are in one-to-one correspondence with the positions of the four lower edges of the screen frame 4, and the rotating shafts 14 are parallel to the lower edges of the screen frame 4. A plurality of pins 15 for piercing the screen cloth 5 are fixedly connected to the side wall of the rotating shaft 14, and the plurality of pins 15 are arranged at equal intervals along the length direction of the rotating shaft 14. The side wall of the rotating shaft 14 is also fixedly connected with a pressing strip 16, the length direction of the pressing strip 16 is the same as that of the rotating shaft 14, and when the contact pins 15 are screwed off the lower edge of the screen frame 4, the pressing strip 16 can be screwed to the lower edge of the screen frame 4 and finally abuts against the lower edge of the screen frame 4. Bevel gears 17 are fixedly sleeved at two ends of each rotating shaft 14, and the bevel gears 17 on two adjacent rotating shafts 14 are meshed with each other. In order to ensure the normal engagement of the two bevel gears 17, the connecting plate 13 is also provided with a protective cover 18 for preventing foreign objects from falling onto the bevel gears 17. A worm wheel 19 is fixedly sleeved on the side wall of one of the rotating shafts 14, a worm 20 meshed with the worm wheel 19 is connected to the connecting plate 13 in a rotating mode, a handle 21 is fixedly connected to one end, far away from the screen frame 4, of the worm 20, and the worm wheel 19, the worm 20 and the handle 21 form a driving part for rotating the rotating shaft 14; the bevel gears 17 and the driving member constitute a driving mechanism for driving the contact pins 15 on the four rotating shafts 14 and simultaneously pulling the screening cloth 5 outwards.

A worker can select the sieve cloth 5 with a proper aperture according to the particle size of a material, then four sides of the sieve cloth 5 are respectively pulled to the four rotating shafts 14 and are inserted by the corresponding contact pins 15, then the worm 20 can be rotated through the handle 21, one rotating shaft 14 rotates under the meshing action of the worm 20 and the worm wheel 19, then under the meshing action of the four pairs of bevel gears 17, the four rotating shafts 14 simultaneously rotate, the contact pins 15 on the rotating shafts 14 rotate in the direction away from the center of the sieve frame 4 and pull the sieve cloth 5 outwards, and the sieve cloth 5 is flattened. As the rotation shaft 14 continues to rotate, the pressing strip 16 gradually approaches the lower edge of the screen frame 4 and finally presses the screen cloth 5 against the lower edge of the screen frame 4, and the screen cloth 5 is completely installed. When the screen cloth 5 needs to be taken down, a worker rotates the worm 20 in the reverse direction, the rotating shaft 14 rotates in the reverse direction under the meshing action of the worm 20 and the worm wheel 19, the pressing strip 16 does not press the screen cloth 5 any more, the contact pins 15 do not flatten the screen cloth 5 any more, the worker separates the screen cloth 5 from the contact pins 15 again, and the screen cloth 5 can be taken away.

Referring to fig. 1 and 3, an arc-shaped strip 22 is further fixedly connected to the side wall of the rotating shaft 14, the length direction of the arc-shaped strip 22 is the same as the length direction of the rotating shaft 14, the arc-shaped strip 22 is located between the pressing strip 16 and the row of pins 15, and the shortest distance from each point on the arc-shaped strip 22 to the central axis of the rotating shaft 14 gradually decreases from the center of the rotating shaft 14 to both ends. When the pins 15 pull the screen cloth 5 outwards, the arched strips 22 will gradually abut against the screen cloth 5 and further stretch the screen cloth 5 towards the two ends of the arched strips 22, so as to further improve the flattening effect of the screen cloth 5 and speed up the replacement of the screen cloth 5.

Referring to fig. 1, 2 and 3, a push plate 23 is disposed on a side wall of the rotating shaft 14, a length direction of the push plate 23 is the same as that of the rotating shaft 14, a plurality of through holes 24 are disposed on the push plate 23, positions of the through holes 24 correspond to positions of the pins 15 one by one, and the through holes 24 are used for the pins 15 to penetrate out. Equal fixedly connected with columniform guide bar 25 on the both ends of push pedal 23, the length direction of guide bar 25 is the same with the length direction of push pedal 23, still set up on connecting plate 13 and supply the guide bar 25 tip to slide to inlay the convex guide way 26 of establishing, the one end that guide way 26 kept away from reel 4 is close to the axis of pivot 14, the one end that guide way 26 is close to reel 4 is far away from the axis of pivot 14, the both ends of guide way 26 are not on the same radius direction of pivot 14. The push plate 23 is close to the fixed connection gag lever post 27 on the surface of pivot 14, and the length direction of gag lever post 27 is the same with the radius direction of pivot 14, and still sets up the spacing groove 28 that supplies spacing groove 28 slip to inlay to establish on the pivot 14, and the inner wall of spacing groove 28 is laminated with the outer wall of gag lever post 27 all the time. When the pins 15 are turned outwards and pull the sieving cloth 5, the position of the guide rod 25 in the guide groove 26 will change and gradually approach the rotating shaft 14, the limiting rod 27 will slide into the limiting groove 28, and the pushing plate 23 will slightly expose the pins 15 for the sieving cloth 5 to insert. When the pins 15 turn inwards and release the screen cloth 5, the position of the guide rod 25 in the guide groove 26 changes and gradually moves away from the rotating shaft 14, the limiting rod 27 slides out of the limiting groove 28, and the push plate 23 pushes the screen cloth 5 to the tips of the pins 15 little by little, so that a worker can take the screen cloth 5 later.

Referring to fig. 1 and 4, a rectangular fixing frame 29 is fixedly connected between the four connecting plates 13, the fixing frame 29 is located under the screen frame 4, a plurality of supporting rods 30 for supporting the screen cloth 5 are fixedly connected to the inner side wall of the fixing frame 29, the plurality of supporting rods 30 are distributed in the fixing frame 29 at equal angular intervals, and the free end of each supporting rod 30 is inclined downwards towards the center of the fixing frame 29. The first support rod 30 can support the screen cloth 5, so that workers can conveniently insert the screen cloth 5 on the contact pins 15, and meanwhile, the support rod 30 can maintain the shape of the screen cloth 5, and the screening effect of the screen cloth 5 on materials is ensured; two can gather together the material on the screen cloth 5 toward the middle zone of screen cloth 5 after the material screening, after contact pin 15 takes off from screen cloth 5, large granule material will freely fall down from the middle zone of many spinal branch vaulting poles 30 together with screen cloth 5, and screen cloth 5 can just wrap up large granule material simultaneously, makes the workman can take away screen cloth 5 and large granule material smoothly.

The implementation principle of the embodiment is as follows: a worker can select the sieve cloth 5 with a proper aperture according to the particle size of a material, then four sides of the sieve cloth 5 are respectively pulled to the four rotating shafts 14 and are inserted by the corresponding contact pins 15, then the worm 20 can be rotated through the handle 21, one rotating shaft 14 rotates under the meshing action of the worm 20 and the worm wheel 19, then under the meshing action of the four pairs of bevel gears 17, the four rotating shafts 14 simultaneously rotate, the contact pins 15 on the rotating shafts 14 rotate in the direction away from the center of the sieve frame 4 and pull the sieve cloth 5 outwards, and the sieve cloth 5 is flattened. As the rotation of the shaft 14 continues, the bead 16 will gradually get closer to the lower edge of the screen frame 4 and eventually press the screen cloth 5 against the lower edge of the screen frame 4, and the screen cloth 5 is completely installed. When the screen cloth 5 needs to be taken down, a worker rotates the worm 20 in the reverse direction, the rotating shaft 14 rotates in the reverse direction under the meshing action of the worm 20 and the worm wheel 19, the pressing strip 16 does not press the screen cloth 5 any more, the contact pins 15 do not flatten the screen cloth 5 any more, the worker separates the screen cloth 5 from the contact pins 15 again, and the screen cloth 5 can be taken away.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a sieving machine, includes reel (4) and screen cloth (5), its characterized in that: horizontal rotating shafts (14) are rotatably connected to four side walls of the screen frame (4), the positions of the rotating shafts (14) correspond to the positions of the lower edges of the screen frame (4) one by one, and the rotating shafts (14) are parallel to the corresponding lower edges; a row of pins (15) for piercing the screen cloth (5) are fixedly connected to the side wall of the rotating shaft (14), and a pressing strip (16) for pressing the screen cloth (5) on the lower edge of the screen frame (4) when the pins (15) pull the screen cloth (5) outwards is further arranged on the side wall of the rotating shaft (14); the screen frame (4) is provided with a driving mechanism which drives the contact pins (15) on the four rotating shafts (14) to simultaneously pull the screen cloth (5) outwards; the side wall of the rotating shaft (14) is provided with an arched strip (22) which is the same as the rotating shaft (14) in the length direction, the arched strip (22) is positioned between the inserting needle (15) and the pressing strip (16), and the shortest distance from each point on the arched strip (22) to the central axis of the rotating shaft (14) is gradually reduced from the center of the rotating shaft (14) to two ends; four corners of the screen frame (4) are fixedly connected with connecting plates (13) for rotatably embedding the end parts of the rotating shafts (14); the driving mechanism comprises bevel gears (17) which are fixedly sleeved between two adjacent rotating shafts (14) and are meshed with each other, and a driving part which is arranged on one connecting plate (13) and is used for rotating the corresponding rotating shaft (14); a push plate (23) which is the same as the rotating shaft (14) in the length direction is arranged on the side wall of the rotating shaft (14), and a plurality of through holes (24) for inserting pins (15) to pass through are formed in the push plate (23); the two ends of the push plate (23) are respectively provided with a guide rod (25) which is the same as the length direction of the push plate (23), the connecting plate (13) is provided with a guide groove (26) for the end part of the guide rod (25) to be embedded in a sliding manner, when the contact pin (15) rotates towards the center of the screen frame (4), the guide groove (26) can drive the guide rod (25) and the push plate (23) to move towards the direction far away from the rotating shaft (14), and the push plate (23) can push the screen cloth (5) to the tip end of the contact pin (15); a limiting groove (28) which is the same as the rotating shaft (14) in the radial direction is formed in the rotating shaft (14), and a limiting rod (27) fixedly connected with the push plate (23) is embedded in the limiting groove (28) in a sliding manner; the guide groove (26) is arc-shaped.

2. A vibratory screening machine as set forth in claim 1 wherein: the driving part comprises a worm wheel (19) fixedly sleeved on the side wall of the rotating shaft (14), a worm (20) rotatably connected to the connecting plate (13) and meshed with the worm wheel (19), and a handle (21) arranged on the worm (20).

3. A vibratory screening machine as set forth in claim 1 wherein: and a protective cover (18) for wrapping the bevel gear (17) is arranged on the connecting plate (13).

4. A vibratory screening machine as set forth in claim 1 wherein: the below of reel (4) is equipped with fixed frame (29), is equipped with many spinal branchs in fixed frame (29) and is bracing piece (30) that the downward sloping set up towards the center of fixed frame (29).