CN105830630B - Cleaning and conveying device for combine harvester - Google Patents

Abstract

The invention provides a cleaning and conveying device for a combine harvester, and belongs to the technical field of combine harvesters. This a cleaning conveyor for combine includes: a frame; the vibrating screen device is obliquely arranged on the rack; the fan assembly is arranged on the rack and faces the vibrating screen device, the fan assembly comprises a fan cover plate and a fan, the fan comprises a large end and a small end, and the wind speed of the large end is larger than that of the small end; the collecting bin is arranged in the rack and is positioned below the vibrating screen device; the grain conveying device is communicated to the collecting bin and is arranged on the rack; the fan assembly blows horizontal wind and transverse wind to the vibrating screen device, fallen objects of crops fall to the vibrating screen device and are cleaned, the fallen objects are blown by the transverse wind and are evenly distributed on the vibrating screen device, the fallen objects fall to the collecting bin, and the grain conveying device conveys the fallen objects in the collecting bin. The invention has the advantages of good cleaning effect and high conveying efficiency.

Description

A cleaning and conveying device for combine harvesters

technical field

The invention belongs to the technical field of combine harvesters, and relates to a combine harvester, in particular to a cleaning and conveying device for the combine harvester.

Background technique

Chinese patent CN102124872A discloses a cleaning mechanism for a combine harvester, which belongs to the technical field of agricultural machinery. The main body of the cleaning screen of the mechanism is provided with a screed conveying plate at one end below the threshing concave screen, and a scraping section is arranged at one end away from the threshing concave screen; The middle part of the main body is inclined, and the downwardly inclined end of each draft section extends a blanking section lower than the downwardly inclined end of the screed conveying plate, and an air selection port is formed between the downwardly inclined end of the screed conveying plate and the downwardly inclined end of the blanking section; The conveying plate and the drafting section are respectively hinged with the upper ends of the active rocker and the driven rocker hinged on the frame to form a double rocker mechanism; the active rocker is fixedly connected with the driving rocker in the crank rocker mechanism.

The effectiveness of grain cleaning in the threshing process is an important indicator of threshing efficiency. Selecting an efficient cleaning conveying device can make the threshing more rapid and the cleaning effect good.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above-mentioned problems in the prior art, and propose a cleaning and conveying device for combine harvesters with good cleaning effect and high conveying efficiency.

The purpose of the present invention can be achieved through the following technical solutions: a cleaning and conveying device for combine harvesters, characterized in that it includes:

frame;

A vibrating screen device, the vibrating screen device is installed obliquely on the frame;

A fan assembly, the fan assembly is installed on the frame and faces the vibrating screen device, the fan assembly includes a windshield plate and a fan installed in the windshield plate, and the rotating surface of the fan is in the shape of a frustum, including a large end and a small end, The rotation of the fan generates horizontal wind and lateral wind, and the wind speed of the big end is greater than the wind speed of the small end;

a collection bin, which is installed in the frame and below the vibrating screen device;

a grain conveying device connected to the collection bin and mounted on the frame;

The fan assembly blows horizontal wind and lateral wind to the vibrating screen device, and the fallen objects of the crops fall to the vibrating screen device and are cleaned. The grain conveying device conveys the fallen material in the collection bin.

In the above-mentioned cleaning and conveying device for combine harvesters, the grain conveying device includes a horizontal conveying assembly and a vertical conveying auger obliquely installed on the horizontal conveying assembly, and the horizontal conveying assembly is connected to the collection bin, so The horizontal conveying assembly conveys the protruding material to the vertical conveying auger, and the vertical conveying auger comprises a vertical auger shell and a vertical auger shaft installed in the vertical auger shell, and an output port is provided on the vertical auger shell, The vertical auger shaft is provided with a spiral conveyor belt and an output plate arranged at the end of the conveyor belt, and the output plate is facing the output port.

In the above-mentioned cleaning and conveying device for combine harvesters, the collection bin is in a "V" shape, and the horizontal conveying assembly includes a horizontal auger assembly and a power assembly for driving the horizontal auger assembly. The bottom is arranged in an arc shape, the horizontal auger assembly is installed at the bottom of the collection bin, and the axis of the horizontal auger assembly coincides with the bottom axis of the collection bin.

In the above-mentioned cleaning and conveying device for combine harvesters, the vibrating screen device includes a screen plate, a re-screening assembly connected to the screen plate, and a connecting rod connecting the screen plate and a frame, and the frame is An eccentric drive assembly is installed on it, the eccentric drive assembly is connected to a connecting rod, the air outlet of the fan assembly is facing the sieve plate and the re-screening assembly, the connecting rod drives the vibrating screen to reciprocate, and the fallen objects are screened by the sieve plate and fall. to the secondary screening component for secondary screening.

In the above-mentioned cleaning and conveying device for combine harvesters, several rows of sieve holes parallel to each other are opened on the sieve plate, and two adjacent rows of sieve holes are staggered, and one side of each sieve hole is inclined and protruded. There are baffles, and the baffles face the side where the falling objects fall.

In the above-mentioned cleaning and conveying device for a combine harvester, the re-screening assembly includes a re-screening plate and connecting plates connected to both sides of the re-screening plate, the connecting plates are connected to the sieve plate, and the re-screening plate is The sieve plate is provided with several rows of multiple sieve holes, and the two adjacent rows of multiple sieve holes are staggered.

In the above-mentioned cleaning and conveying device for combine harvesters, the fan includes a rotating shaft, a mounting plate and a fan blade fixed on the mounting plate, and the mounting plate is divided into four equal parts along the circumferential direction of the rotating shaft Installed on the rotating shaft, the fan blade is provided with a tapered surface, and the tapered surface faces the wind cover plate.

In the above-mentioned cleaning and conveying device for combine harvesters, two air outlets are provided on the hood plate, two sets of fans are installed on the rotating shaft along the axial direction, and the two sets of fan blades correspond to an air outlet.

In the above-mentioned cleaning and conveying device for combine harvesters, the eccentric drive assembly includes an eccentric sprocket, a rotating shaft vertically fixed on the eccentric sprocket, a swing rod sleeved on the rotating shaft, and a hinge mounted on the eccentric sprocket. The swing arm on the swing rod, the swing arm is fixedly connected to the connecting rod, the axis of the rotating shaft does not coincide with the axis of the eccentric sprocket, the rotation of the eccentric sprocket drives one end of the swing rod to make a circular motion, and the other end of the swing rod drives the swing arm Swing back and forth.

In the above-mentioned cleaning and conveying device for combine harvesters, a bearing seat is installed on the frame, a vibration shaft is installed on the bearing seat, and the connecting rod is provided with four connecting rods respectively connected to the vibrating screen device Two of the connecting rods are fixedly connected to the vibration shaft symmetrically, the other two connecting rods are hingedly mounted on the frame, and the swing arm is fixedly connected to the end of the vibration shaft.

In the above-mentioned cleaning and conveying device for combine harvesters, a draft scraper is hingedly installed on the re-screening component, a plurality of rows of adjustment holes are opened on the draft scraper, and the screen plate is hingedly installed There is a pull rod, and the other end of the pull rod is positioned and installed on an adjustment hole.

Compared with the prior art, the present invention has the following advantages:

1. Install the fan assembly on the rack. The fan assembly blows horizontal wind and lateral wind to the vibrating screen device. The horizontal wind can blow the impurities out of the vibrating screen device, and the lateral wind can drive the falling material to move laterally, so that the falling material falls into the vibration The position of the screen device is more symmetrical, which makes the screening effect of the vibrating screen device more obvious and improves the screening efficiency.

2. The vibrating screen is equipped with a sieve plate and a re-screening device, which can screen the shedding material for a second time. The screening quality is good and the impurities are few. Part of the falling material enters the re-threshing device for secondary threshing, so that the overall threshing is complete.

3. A baffle is set on one side of the sieve holes on the sieve plate to prevent large groups of falling materials from directly passing through the sieve plate and falling into the re-screening component, so that small particles fall into the re-screening device, and the screening is clean and tidy. The re-screening device is blocked.

4. The sieve holes and the double sieve holes are distributed in a staggered manner, which can effectively cover all the shedding materials, so that the shedding materials can be completely screened.

5. The "V"-shaped collection bin is set up to facilitate the collection of the cleaned shedding material, so that the shedding material gathers at the bottom of the collection bin and is transported through the horizontal conveying component, and then transported to the vertical conveying auger, which will fall off. The material is output and cleaned components, and then enter the next process, such as drying or packaging.

Description of drawings

FIG. 1 is a schematic diagram of the left side view of the structure of the present invention.

FIG. 2 is a schematic view of the structure of the present invention from the right side.

Figure 3 is a schematic structural diagram of a vibrating screen device in the present invention.

Figure 4 is a schematic structural diagram of a sieve plate in the present invention.

5 is a schematic diagram of the installation structure of the vibrating screen device in the present invention.

FIG. 6 is a schematic structural diagram of a fan assembly in the present invention.

FIG. 7 is a schematic front view of the structure of the grain conveying device of the present invention.

Fig. 8 is a schematic side view of the structure of the grain conveying device of the present invention.

In the figure, 1, frame; 2, threshing mechanism; 21, main threshing device; 22, re-threshing device; 3, collecting bin; 4, vibrating screen device; 41, sieve plate; 411, sieve hole; 412, baffle ; 42, re-screening assembly; 421, re-screening plate; 422, connecting plate; 423, re-screening hole; 5, grain conveying device; 51, horizontal conveying assembly; 511, horizontal auger assembly; 512, power assembly; 513, Horizontal auger shaft; 514, conveyor bar; 52, vertical conveyor auger; 521, vertical auger shell; 522, vertical auger shaft; 523, conveyor belt; 524, output plate; 525, output port; 6, eccentric drive Component; 61, eccentric sprocket; 62, swing rod; 63, swing arm; 64, vibration shaft; 65, connecting rod; 66, bearing seat; 67, rotating shaft; 7, drafter; 71, adjusting hole; 72, Pull rod; 8, fan assembly; 81, rotating shaft; 82, mounting plate; 821, bending part; 83, fan blade; 831, tapered surface; 84, wind cover plate; 85, fan; 841, big end; 842, little endian.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

As shown in Figures 1 to 3, the cleaning and conveying device for combine harvesters includes: a frame 1, a vibrating screen device 4, a fan assembly 8, a collection bin 3 and a grain conveying device 5, and the vibrating screen device 4 is inclined It is installed on the frame 1, and a threshing mechanism 2 is installed above the vibrating screen device 4. The threshing mechanism 2 includes a main threshing device 21 and a re-threshing device 22. The main threshing device 21 can thresh crops, and the re-threshing device 22 can The uncompletely threshed shedding of the main threshing device 21 is subjected to secondary threshing, and the shedding falls on the vibrating screen device 4. The fan assembly 8 is installed on the frame 1 and faces the vibrating screen device 4. The fan assembly 8 includes a wind cover plate 84 and The fan 85 installed in the wind shield plate 84, the rotating surface of the fan 85 is in the shape of a truncated cone, including the large end 841 and the small end 842, the fan 85 rotates to generate horizontal wind and lateral wind, and the wind speed of the big end 841 is greater than the wind speed of the small end 842, The big end 841 is close to the side where the threshing mechanism 2 has a large amount of shedding, the collection bin 3 is installed in the frame 1 and is located below the vibrating screen device 4, the grain conveying device 5 is connected to the collection bin 3 and is installed on the frame 1, The fan assembly 8 blows horizontal wind and lateral wind to the vibrating screen device 4, and the fallen objects of the crops fall to the vibrating screen device 4 and are cleaned. In the collection bin 3, the grain conveying device 5 transports the fallen objects in the collection bin 3.

The fan assembly 8 blows horizontal wind and lateral wind to the vibrating screen device 4, the fallen material of the crops falls to the vibrating screen device 4 and is cleaned, and the fan 85 blows the falling material in the process of falling to the vibrating screen device 4, so that the light weight offal The plants are blown out of the vibrating screen device 4, so that the heavy-weight independent or bundled shedding falls on the vibrating screen device 4 and is cleaned. The transverse wind drives the falling objects to one side, so that the distribution of the falling objects is more balanced, and the vibration screening efficiency of the vibrating screen device 4 is higher. The sloughed objects that have been vibrated and cleaned by the vibrating screen device 4 are gathered into the collection bin 3 and then transported out by the grain conveying device 5 to enter the drying or packaging process, so as to avoid the accumulation and retention of the collection bin 3, which is beneficial to the cleanliness and efficiency of the cleaning. high transmission efficiency.

As shown in FIGS. 2 , 7 and 8 , the grain conveying device 5 includes a horizontal conveying assembly 51 and a vertical conveying auger 52 obliquely installed on the horizontal conveying assembly 51 . The horizontal conveying assembly 51 communicates with the collection bin 3 , and the horizontal conveying assembly 51 The material is conveyed to the vertical conveying auger 52. The vertical conveying auger 52 includes a vertical auger shell 521 and a vertical auger shaft 522 installed in the vertical auger shell 521. The side wall of one end of the shell 521 is provided with an output port 525. The vertical auger shaft 522 is provided with a spiral conveyor belt 523 and an output plate 524 arranged at the end of the conveyor belt 523. The output plate 524 is facing the output port 525. The conveyor belt The rotating outer diameter of 523 is slightly smaller than the inner diameter of the vertical auger shell 521 .

The inclined setting of the vertical conveying auger 52 can make the falling material conveyed to the vertical conveying auger 52 along the horizontal conveying assembly 51 without being stuck, and an output port 525 is opened on the side wall of the end of the vertical conveying auger 52, and on the output port 525 The output channel is connected to make the falling material output from a high place, which is convenient for the flow processing of the next process. The vertical conveying auger 52 can ensure the conveying efficiency and occupy a small space, and improve the conveying efficiency.

The collection bin 3 is in a "V" shape, one side of the collection bin 3 is vertical, the other side is inclined, and the inclined side faces the vibrating screen device 4. The horizontal conveying assembly 51 includes a horizontal auger assembly 511 and a driving horizontal auger assembly 511 The bottom of the collection bin 3 is arranged in an arc shape, the horizontal auger assembly 511 is installed at the bottom of the collection bin 3 and the axis of the horizontal auger assembly 511 and the bottom axis of the collection bin 3 are coincident. The horizontal auger assembly 511 includes a horizontal auger shaft 513 and a power assembly 512 installed on the horizontal auger shaft 513. The horizontal auger shaft 513 is provided with a spiral conveying bar 514, the horizontal auger shaft 513 rotates, and the conveying bar 514 The falling material at the bottom of the collection bin 3 is conveyed to the vertical conveying auger 52, which is convenient for conveying.

The vibrating screen device 4 includes a screen plate 41, a re-screen assembly 42 connected to the screen plate 41, a connecting rod 65 connecting the screen plate 41 and the frame 1, an eccentric drive assembly 6 is installed on the frame 1, and the eccentric drive assembly 6 is connected To the connecting rod 65, the air outlet of the fan assembly 8 is facing the screen plate 41 and the re-screening assembly 42. The connecting rod 65 drives the vibrating screen device 4 to reciprocate. 42 is subjected to secondary screening, and another part of the exfoliated material is transported to the threshing mechanism 2 for secondary threshing and falls into the vibrating screen device 4 for screening again. Through the circular motion of the eccentric drive assembly 6, the connecting rod 65 is driven to do reciprocating swing, the operation is stable, the structure is ingenious, the swing amplitude is stable, and the power transmission is fast and effective. The shedding material is screened for the second time, and at the same time, the fan assembly 8 further blows the shedding material between the sieve plate 41 and the re-screening component 42, so that the shedding material falling along the sieve plate 41 is further cleaned, so that the fallen material particles are clean and cleaned. high quality.

As shown in FIG. 3 and FIG. 6 , the fan 85 includes a rotating shaft 81 , a plurality of mounting plates 82 installed along the radial direction of the rotating shaft 81 , and a fan blade 83 fixed on the mounting plate 82 , and the mounting plate 82 is provided with bending part 821, the fan blade 83 is installed on the bending part 821, the fan blade 83 is provided with a tapered surface 831, the tapered surface 831 faces the wind cover plate 84, and the mounting plate 82 is installed in four equal parts along the circumferential direction of the rotating shaft 81 on the rotating shaft 81, the rotating shaft 81 is connected with the threshing mechanism 2 through a transmission chain. Preferably, the hood plate 84 is provided with two air outlets, two sets of fans 85 are installed on the rotating shaft 81 along the axial direction, and the two sets of fans 83 correspond to one air outlet respectively. The fan blade 83 is installed on the mounting plate 82, the rotating shaft 81 drives the mounting plate 82 to rotate, and the fan blade 83 rotates to drive the air flow. Since the fan blade 83 is provided with a conical surface 831, the two ends of the fan blade 83 generate a wind pressure difference, forming a horizontal Wind, when the threshing mechanism 2 is threshing the crops, since the crop feed is not evenly distributed on the threshing mechanism 2, it is easy to cause a lot of falling objects at the feeding place, and the lateral wind can make the fan 85 blow the falling objects. The lateral displacement makes the falling objects fall in a lateral direction, so that the falling objects on the vibrating screen device 4 are relatively balanced.

As shown in FIGS. 3 to 5 , the vibrating screen device 4 is installed obliquely on the frame 1, and the eccentric drive assembly 6 drives the higher end of the vibrating screen device 4. The screen plate 41 is in the shape of a flat plate. Rows of screen holes 411 are parallel to each other and two adjacent rows of screen holes 411 are staggered. A baffle 412 is obliquely protruded on one side of each screen hole 411. The sieve hole 411 is opened, and the falling objects cannot directly fall into the sieve hole 411, but hit the baffle 412 and slide down to the adjacent sieve hole 411 or enter the sieve hole 411 through back and forth vibration, effectively avoiding blockage in the sieve hole 411, and the sieve hole 411 The staggered distribution can effectively control the falling material to pass through the sieve hole 411 quickly, avoid dead corners, and the passing speed is fast.

The re-screening assembly 42 includes a re-screening plate 421 and a connecting plate 422 connected to both sides of the re-screening plate 421. The connecting plate 422 is connected to the sieve plate 41, and the re-screening plate 421 and the two connecting plates 422 form a "U"-shaped screening groove, The re-screening plate 421 is provided with several rows of re-screening holes 423, the re-screening holes 423 are circular, the density of the re-screening holes 423 is high, and the two adjacent rows of the re-screening holes 423 are staggered.

The setting of the re-screening assembly 42 can make the falling objects from the sieve plate 41 completely converge on the re-screening plate 421. The re-screening assembly 42 is provided with the blowing wind, and the chopped part of the falling material is taken away by the wind, and the full grains are blown away. After the re-screening plate 421 falls into the collection bin 3, the cleanliness is high.

The eccentric drive assembly 6 includes an eccentric sprocket 61, a rotating shaft 67 vertically fixed on the eccentric sprocket 61, a swing rod 62 sleeved on the rotating shaft 67, and a swing arm 63 hingedly mounted on the swing rod 62. The swing arm 63 is fixed Connected to the connecting rod 65, the axis of the rotating shaft 67 does not coincide with the axis of the eccentric sprocket 61. The rotation of the eccentric sprocket 61 drives one end of the swing rod 62 to make a circular motion, and the other end of the swing rod 62 drives the swing arm 63 to swing back and forth. The swing arm 63 is driven to swing back and forth by the circular motion of the sprocket, so that the vibrating screen device 4 swings back and forth to screen the fallen objects. The structure is ingenious and the vibration and swing effects are good.

A bearing seat 66 is installed on the frame 1, a vibration shaft 64 is installed on the bearing seat 66, and four connecting rods 65 are respectively connected to the two ends of the vibrating screen device 4, and two connecting rods 65 are symmetrically connected to the vibration screen device 4. On the shaft 64 , the other two connecting rods 65 are hingedly mounted on the frame 1 , and the swing arm 63 is fixedly connected to the end of the vibration shaft 64 . The vibration shaft 64 is connected to both sides of the frame 1 across, the connecting rod 65 is connected to the inner side of the frame 1, one end of the vibration shaft 64 protrudes from the frame 1 and is connected with the swing arm 63, the connecting rod 65 and the vibrating screen device 4 Hinged connection, therefore, when the eccentric sprocket 61 drives the vibrating shaft 64 to swing back and forth, the connecting rod 65 drives the vibrating screen device 4 to swing back and forth, with large bearing capacity, stable swing and large bearing capacity.

A scraper 7 is hingedly installed on the double screen assembly 42 . The scraper 7 is provided with several rows of adjustment holes 71 , and a pull rod 72 is hingedly installed on the screen plate 41 . A plurality of rows of adjustment holes 71 are arranged on the scraper 7, and the angle of the scraper 7-month re-screening assembly 42 can be adjusted through the pull rod 72, so as to control the quality of the falling material blown out of the harvester, and ensure that the effective grains fall into the collection bin 3 , the waste is output from the scraper 7.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Claims (2)

1. A cleaning conveying device for combine harvesters, characterized in that, comprising: frame; A vibrating screen device, the vibrating screen device is installed obliquely on a frame, and the vibrating screen device includes a sieve plate, a re-screening assembly connected to the sieve plate, and a connecting rod connecting the sieve plate and the frame, and the frame is An eccentric drive assembly is installed, the eccentric drive assembly is connected to the connecting rod, and the eccentric drive assembly includes an eccentric sprocket, a rotating shaft vertically fixed on the eccentric sprocket, a pendulum rod sleeved on the rotating shaft, and a hingedly mounted on the pendulum. The swing arm on the rod is fixedly connected to the connecting rod. The axis of the rotating shaft does not coincide with the axis of the eccentric sprocket. The rotation of the eccentric sprocket drives one end of the swing rod to make a circular motion, and the other end of the swing rod drives the swing arm to reciprocate. Swing, the air outlet of the fan assembly is facing the sieve plate and the re-screening assembly, the connecting rod drives the vibrating screen to reciprocate, and the fallen material is screened by the sieve plate and falls to the re-screening assembly for secondary screening; Several rows of sieve holes parallel to each other and two adjacent rows of sieve holes are staggered, and a baffle plate is inclined and protruded on one side of each sieve hole, and the baffle plate faces the side where the falling objects fall; the re-screening assembly includes: The re-screening plate and the connecting plates connected on both sides of the re-screening plate, the connecting plate is connected to the sieve plate, the re-screening plate is provided with several rows of re-sieving holes, and the two adjacent rows of re-sieving holes are staggered; A fan assembly, the fan assembly is installed on the frame and faces the vibrating screen device, the fan assembly includes a windshield plate and a fan installed in the windshield plate, and the rotating surface of the fan is in the shape of a frustum, including a large end and a small end, The rotation of the fan generates horizontal wind and lateral wind. The wind speed of the big end is greater than the wind speed of the small end. There are two air outlets on the wind cover plate, and two sets of fans are installed on the rotating shaft along the axial direction. The fan blades correspond to one air outlet respectively. The fan includes a rotating shaft, a mounting plate and a fan blade fixed on the mounting plate. The mounting plate is installed on the rotating shaft in four equal parts along the circumferential direction of the rotating shaft. The blade is provided with a tapered surface, and the tapered surface faces the wind shield plate; a collection bin, which is installed in the frame and below the vibrating screen device; A grain conveying device, the grain conveying device is connected to the collection bin and is installed on the frame; the grain conveying device comprises a horizontal conveying assembly and a vertical conveying auger installed obliquely on the horizontal conveying assembly, and the horizontal conveying assembly communicates with the collection The horizontal conveying assembly conveys the extruded material to the vertical conveying auger, the vertical conveying auger includes a vertical auger shell and a vertical auger shaft installed in the vertical auger shell, and the vertical auger shell is provided The output port, the vertical auger shaft is provided with a spiral conveyor belt and an output plate arranged at the end of the conveyor belt, and the output plate is facing the output port; the collection bin is in the shape of a "V", and the horizontal conveying The assembly includes a horizontal auger assembly and a power assembly for driving the horizontal auger assembly, the bottom of the collection bin is set in an arc shape, the horizontal auger assembly is installed at the bottom of the collection bin, and the axis of the horizontal auger assembly and the bottom of the collection bin are axis coincidence; The fan assembly blows horizontal wind and lateral wind to the vibrating screen device, and the fallen objects of the crops fall to the vibrating screen device and are cleaned. The grain conveying device conveys the fallen material in the collection bin. 2 . The cleaning and conveying device for combine harvesters according to claim 1 , wherein a bearing seat is installed on the frame, a vibration shaft is installed on the bearing seat, and the connecting rod is installed on the connecting rod. 3 . There are four connecting rods respectively connecting the two ends of the vibrating screen device, two connecting rods are symmetrically fixed on the vibration shaft, the other two connecting rods are hingedly installed on the frame, and the swing arm is fixed on the end of the vibration shaft .

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