阅读说明：本技术 一种自动筛分装置 (Automatic screening device ) 是由 王鑫 于 2021-08-27 设计创作，主要内容包括：本发明一种自动筛分装置包括机体(101),其配置有进料口(102)；第一筛子(103),其配置在机体(101)内；储存箱(104),其配置在机体(101)底部以存储筛分后的物料；晃动机构(200),其通过电机(201)驱动使第一筛子(103)左右运动。本发明通过电机(201)驱动晃动机构(200)使第一筛子(103)左右运动从而带动第一筛子(103)内的物料左右晃动向下落入存储箱,使物料得到筛选,并且动过左右晃动提高筛分效率,减轻了噪音污染,使筛选的物料更加均匀。(The invention relates to an automatic screening device, which comprises a machine body (101) provided with a feeding hole (102); a first screen (103) disposed in the machine body (101); a storage tank (104) disposed at the bottom of the machine body (101) to store the screened material; and a shaking mechanism (200) which drives the first sieve (103) to move left and right through a motor (201). According to the invention, the motor (201) drives the shaking mechanism (200) to move the first sieve (103) left and right, so that the materials in the first sieve (103) are driven to shake left and right and fall into the storage box downwards, the materials are screened, the left and right shaking is performed, the screening efficiency is improved, the noise pollution is reduced, and the screened materials are more uniform.)

1. An automatic screening device which characterized in that: comprises that

A body (101) provided with a feed opening (102);

a first screen (103) disposed in the machine body (101);

a storage tank (104) disposed at the bottom of the machine body (101) to store the screened material;

and a shaking mechanism (200) which drives the first sieve (103) to move left and right through a motor (201).

2. An automatic screening device according to claim 1, wherein: the shaking mechanism (200) comprises a motor (201), a motor output shaft (202), a first connecting rod (203), a first pin shaft (204), a first supporting frame (205), a first long hole (206), a first supporting rod (207), a first guide rail (208) and a first fixing rod (209);

motor (201) and organism (101) fixed connection, motor output shaft (202) with the one end fixed connection of first connecting rod (203), the other end of first connecting rod (203) is installed through the bearing the one end of first round pin axle (204), the other end configuration of first round pin axle (204) is in first rectangular hole (206) and move along it, first rectangular hole (206) are seted up on first carriage (205), first carriage (205) with first bracing piece (207) fixed connection, first bracing piece (207) move along first guide rail (208), first guide rail (208) and organism (101) fixed connection, first bracing piece (207) with first dead lever (209) fixed connection, first dead lever (209) with first sieve (103) are connected.

3. An automatic screening device according to claim 2, wherein: the automatic screening device further comprises a scraping mechanism (300), wherein the scraping mechanism (300) comprises a first rack (301), a first gear (302), a first rotating shaft (303), a shifting rod (304), a first groove (305), a first convex tooth of a convex tooth (306), a first supporting plate (307), a second guide rail (308), a limiting rod (309), an arc-shaped groove (313), a disc (310), a second supporting rod (311) and a scraper (312);

the first support rod (207) is fixedly connected with the first rack (301), the first rack (301) is connected with the first gear (302) in a meshed manner, the first gear (302) is coaxially fixed with the first rotating shaft (303), the first rotating shaft (303) is installed on the machine body (101) through a bearing, the first rotating shaft (303) is fixedly connected with one end of the deflector rod (304), the other end of the deflector rod (304) is provided with the first concave groove (305) which is concave, the first concave groove (305) can be attached to the first convex tooth (306) which is convex, the first convex tooth (306) is arranged on the first support plate (307), the first support plate (307) moves along the second guide rail (308), the second guide rail (308) is fixed with the machine body (101), and the first support plate (307) is fixedly connected with one end of two limit rods (309), an arc-shaped groove (313) formed in the other end of one of the two limiting rods (309) can be attached to an arc-shaped surface of the disc (310), the disc (310) is provided with a third groove (314), the center line of the third groove (314) is overlapped with the center line of the shifting rod (304), the disc (310) is coaxially fixed with the first rotating shaft (303), the first supporting plate (307) is fixedly connected with one end of the second supporting rod (311), the other end of the second supporting rod (311) is connected with the scraper (312), and the scraper (312) is arranged in the first screen (103);

the structural body consisting of the two groups of shifting rods (304), the first groove (305), the first convex tooth (306), the first supporting plate (307), the second guide rail (308), the limiting rod (309), the arc-shaped groove (313), the disc (310), the second supporting rod (311) and the scraper (312) is arranged in a central symmetry mode around the axis of the first rotating shaft (303).

4. An automatic screening device according to claim 3, wherein: the automatic screening device further comprises a rotating mechanism (400), wherein the rotating mechanism (400) comprises a second rack (401), a second gear (402), a second rotating shaft (403), a first belt pulley (404), a first belt (405), a second belt pulley (406), a third rotating shaft (407), a first helical gear (408), a second helical gear (409) and a fourth rotating shaft (410);

the second guide rail (308) is fixedly connected with the second rack (401), the second rack (401) is meshed with the second gear (402), the second gear (402) is coaxially fixed with the second rotating shaft (403), the second rotating shaft (403) is installed on a second support rod (311) through a bearing, the second rotating shaft (403) is coaxially fixed with the first belt pulley (404), the first belt pulley (404) is in belt transmission connection with the second belt pulley (406) through the first belt (405), the second belt pulley (406) is coaxially fixed with the third rotating shaft (407), the third rotating shaft (407) is installed on the second support rod (311) through a bearing, the third rotating shaft (407) is coaxially fixed with the first helical gear (408), and the first helical gear (408) is meshed with the second helical gear (409), the second bevel gear (409) and the fourth rotating shaft (410) are coaxially fixed, the fourth rotating shaft (410) is installed on the second supporting rod (311) through a bearing, and the fourth rotating shaft (410) is fixedly connected with the scraper (312).

5. An automatic screening device according to claim 4, wherein: the automatic screening device further comprises a first swinging mechanism (500), wherein the first swinging mechanism (500) comprises a third bevel gear (501), a fourth bevel gear (502), a crankshaft (510), a crank pin (503), a second connecting rod (504), a third supporting plate (505), a fifth rotating shaft (506), a square hole (507) and a square shaft (508);

the motor output shaft (202) and the third bevel gear (501) are coaxially fixed, the third bevel gear (501) is meshed and connected with the fourth bevel gear (502), the fourth bevel gear (502) is coaxially fixed with the crankshaft (510), the crank pin (503) of the crankshaft (510) is hinged with one end of the second connecting rod (504), one end of the second link (504) is hinge-connected to one side of the third support plate (505), the other side of the third supporting plate (505) is provided with one end of a fifth rotating shaft (506) through a bearing, the fifth rotating shaft (506) is arranged on the machine body (101), the other end of the fifth rotating shaft (506) is provided with the square hole (507), one end of the square shaft (508) which moves along the square hole (507) and synchronously rotates is sleeved in the square hole (507), the other end of the square shaft (508) is fixedly connected with the first sieve (103);

and the structural bodies consisting of the fifth rotating shafts (506), the square holes (507) and the square shafts (508) are symmetrically arranged around the horizontal central line of the first sieve (103).

6. An automatic screening device according to claim 5, wherein: the automatic screening device further comprises a second swing mechanism (600), wherein the second swing mechanism (600) comprises a fifth belt pulley (601), a third belt (602), a sixth belt pulley (603), a worm (604), a turbine (605), a seventh rotating shaft (606), a first crank (607), a third connecting rod (608), a first spring (610) and a second screen (611);

the crankshaft (503) is coaxially fixed with the fifth belt pulley (601), the fifth belt pulley (601) is in belt transmission connection with the sixth belt pulley (603) through a third belt (602), the sixth belt pulley (603) is coaxially fixed with the worm (604), one end of the worm (604) is mounted on the machine body (101) through a bearing, the other end of the worm (604) is in meshing connection with the turbine (605), the turbine (605) is coaxially fixed with the seventh rotating shaft (606), the seventh rotating shaft (606) is mounted on the machine body (101) through a bearing, the seventh rotating shaft (606) is fixedly connected with one end of the first crank (607), the other end of the first crank (607) is in hinge connection with the third connecting rod (608), and the third connecting rod (608) is fixedly connected with one side of one end of the second screen (611), the second sieve (611) is fixedly connected with one end of the first spring (610), and one end of the first spring (610) is fixedly connected with the machine body (101).

7. An automatic screening device according to claim 6, wherein: the automatic screening device further comprises an excessive discharging mechanism (700), wherein the excessive discharging mechanism (700) comprises a third rack (701), a third gear (702), an eighth rotating shaft (703), a second crank (704), a fourth connecting rod (705), a guide sleeve (706), a fifth connecting rod (707), a second spring (708), a cover plate (709), a first through hole (710) and a collecting box (106);

the third connecting rod (608) is fixedly connected with the third rack (701), the third rack (701) is engaged with the third gear (702), the third gear (702) is coaxially fixed with the eighth rotating shaft (703), the eighth rotating shaft (703) is installed on the machine body (101) through a bearing, the eighth rotating shaft (703) is fixedly connected with one end of the second crank (704), the other end of the second crank (704) is hinged with one end of the fourth connecting rod (705), the fourth connecting rod (705) moves along the guide sleeve (706), the guide sleeve (706) is connected with the machine body (101) through a bearing, the other end of the fourth connecting rod (705) is hinged with one end of the fifth connecting rod (707), the fifth connecting rod (707) is fixedly connected with one end of the second spring (707), and the other end of the second spring (708) is fixedly connected with the machine body (101), the fifth connecting rod (707) is arranged in the first through hole (710) formed in the second sieve (611), the collecting box (106) is arranged below the first through hole (710), the collecting box (106) is fixed with the machine body (101), the other end of the fifth connecting rod (707) can be attached to the cover plate (709), and the cover plate (709) is connected with the bottom of the second sieve (611) through a hinge.

8. An automatic screening device according to claim 7, wherein: the first supporting plate (307) is provided with a dovetail-shaped sliding block, and the second guide rail (308) is provided with a dovetail groove.

Technical Field

The invention relates to the field of mechanical equipment, in particular to a device for automatic screening.

Background

At present, many shale shakers adopt the mode screening of vibrations to transport raw and other materials, and traditional vibration mode is that the big environmental protection of noise that the slider produced is beaten to the cam is not up to standard, and the screening is not meticulous, causes the damage to raw and other materials easily, and the device that can realize the even meticulous of screening, the little automatic screening of production noise now needs a urgent need.

Disclosure of Invention

The invention aims to provide an automatic screening device which can realize uniform and fine screening and low production noise.

The invention relates to an automatic screening device, which comprises a machine body, a screening device and a screening device, wherein the machine body is provided with a feeding hole;

a first screen disposed in the machine body;

a storage box configured at the bottom of the machine body to store the screened materials;

and the shaking mechanism is driven by a motor to enable the first sieve to move left and right.

The invention relates to an automatic screening device, wherein a shaking mechanism comprises a motor, a motor output shaft, a first connecting rod, a first pin shaft, a first supporting frame, a first strip hole, a first supporting rod, a first guide rail and a first fixing rod;

the motor is fixedly connected with the machine body, the motor output shaft is fixedly connected with one end of the first connecting rod, the other end of the first connecting rod is provided with one end of the first pin shaft through a bearing, the other end of the first pin shaft is arranged in the first strip hole and moves along the first strip hole, the first strip hole is formed in the first supporting frame, the first supporting frame is fixedly connected with the first supporting rod, the first supporting rod moves along the first guide rail, the first guide rail is fixedly connected with the machine body, the first supporting rod is fixedly connected with the first fixing rod, and the first fixing rod is connected with the first sieve.

The invention relates to an automatic screening device, which further comprises a scraping mechanism, wherein the scraping mechanism comprises a first rack, a first gear, a first rotating shaft, a deflector rod, a first groove, a first convex tooth of a convex tooth, a first supporting plate, a second guide rail, a limiting rod, an arc-shaped groove, a disc, a second supporting rod and a scraper;

the first support rod is fixedly connected with the first rack, the first rack is meshed with the first gear, the first gear is coaxially fixed with the first rotating shaft, the first rotating shaft is installed on the machine body through a bearing, the first rotating shaft is fixedly connected with one end of the shifting rod, the other end of the shifting rod is provided with a concave first groove, the first groove can be attached to a convex first convex tooth, the first convex tooth is arranged on the first support plate, the first support plate moves along the second guide rail, the second guide rail is fixed with the machine body, the first support plate is fixedly connected with one ends of the two limiting rods, an arc-shaped groove arranged at the other end of one of the two limiting rods can be attached to the arc-shaped surface of the disc, the disc is provided with a third groove, and the central line of the third groove is coincided with the central line of the shifting rod, the disc is coaxially fixed with the first rotating shaft, the first supporting plate is fixedly connected with one end of the second supporting rod, the other end of the second supporting rod is connected with the scraper, and the scraper is arranged in the first sieve;

and the structural body consisting of the two groups of the shifting rods, the first groove, the first convex tooth, the first supporting plate, the second guide rail, the limiting rod, the arc-shaped groove, the disc, the second supporting rod and the scraper is arranged in a manner of being symmetrical about the axis center of the first rotating shaft.

The invention relates to an automatic screening device, which further comprises a rotating mechanism, wherein the rotating mechanism comprises a second rack, a second gear, a second rotating shaft, a first belt pulley, a first belt, a second belt pulley, a third rotating shaft, a first helical gear, a second helical gear and a fourth rotating shaft;

the second guide rail with second rack fixed connection, the second rack with the second gear meshing connection, the second gear with the second pivot coaxial fixation, the second pivot is passed through the bearing and is installed on the second bracing piece, the second pivot with first belt pulley coaxial fixation, first belt pulley with the second belt pulley passes through first belt transmission is connected, the second belt pulley with the third pivot coaxial fixation, the third pivot is passed through the bearing and is installed on the second bracing piece, the third pivot with first helical gear coaxial fixation, first helical gear with the second helical gear meshing connection, the second helical gear with the fourth pivot coaxial fixation, the fourth pivot is installed on the second bracing piece through the bearing, fourth pivot and scraper blade fixed connection.

The invention relates to an automatic screening device, which further comprises a first swinging mechanism, wherein the first swinging mechanism comprises a third bevel gear, a fourth bevel gear, a crankshaft, a crankpin, a second connecting rod, a third supporting plate, a fifth rotating shaft, a square hole and a square shaft;

the output shaft of the motor is coaxially fixed with the third bevel gear, the third bevel gear is meshed with the fourth bevel gear, the fourth bevel gear is coaxially fixed with the crankshaft, the crank pin of the crankshaft is hinged with one end of the second connecting rod, one end of the second connecting rod is hinged with one side of the third supporting plate, one end of the fifth rotating shaft is installed on the other side of the third supporting plate through a bearing, the fifth rotating shaft is installed on the machine body, the other end of the fifth rotating shaft is provided with the square hole, one end of the square shaft which moves along the square hole and synchronously rotates is sleeved in the square hole, and the other end of the square shaft is fixedly connected with the first sieve;

and the structural bodies consisting of the fifth rotating shafts, the square holes and the square shafts are symmetrically arranged around the horizontal center line of the first sieve.

The invention relates to an automatic screening device, which further comprises a second swinging mechanism, wherein the second swinging mechanism comprises a fifth belt pulley, a third belt, a sixth belt pulley, a worm, a turbine, a seventh rotating shaft, a first crank, a third connecting rod, a first spring and a second screen;

the bent axle with the fifth belt pulley is coaxial fixed, the fifth belt pulley with the sixth belt pulley passes through the transmission of third belt and is connected, the sixth belt pulley with the worm is coaxial fixed, the bearing is passed through to the one end of worm and installs on the organism, the other end of worm with the turbine meshing is connected, the turbine with the seventh pivot is coaxial fixed, the seventh pivot with install on the organism through the bearing, the seventh pivot with first articulate one end fixed connection, first articulate the other end with third connecting rod hinged joint, one side fixed connection of third connecting rod and the one end of second sieve, the second sieve with the one end fixed connection of first spring, the one end and the organism fixed connection of first spring.

The invention relates to an automatic screening device, which further comprises an excessive discharging mechanism, wherein the excessive discharging mechanism comprises a third rack, a third gear, an eighth rotating shaft, a second crank, a fourth connecting rod, a guide sleeve fifth connecting rod, a second spring, a cover plate, a first through hole and a collecting box;

the third connecting rod is fixedly connected with the third rack, the third rack is meshed with the third gear, the third gear is coaxially fixed with the eighth rotating shaft, the eighth rotating shaft is installed on the machine body through a bearing, the eighth rotating shaft is fixedly connected with one end of the second crank, the other end of the second crank is hinged with one end of the fourth connecting rod, the fourth connecting rod moves along the guide sleeve, the guide sleeve is connected with a bearing of the machine body, the other end of the fourth connecting rod is hinged with one end of the fifth connecting rod, the fifth connecting rod is fixedly connected with one end of the second spring, the other end of the second spring is fixedly connected with the machine body, the fifth connecting rod is arranged in the first through hole formed in the second through hole, the collecting box is arranged below the first through hole and is fixed with the machine body, the other end of the fifth connecting rod can be attached to the cover plate, and the cover plate is connected with the bottom of the second sieve through hinges.

The invention relates to an automatic screening device, wherein a first supporting plate is provided with a dovetail-shaped sliding block, and a second guide rail is provided with a dovetail groove.

The automatic screening device is different from the prior art in that the motor drives the shaking mechanism to move the first sieve left and right so as to drive the materials in the first sieve to shake left and right and fall into the storage box downwards, so that the materials are screened, the screening efficiency is improved by shaking left and right, the noise pollution is reduced, and the screened materials are more uniform. And the scraping plate is driven by the motor to rotate to stir materials, so that the screening efficiency is improved, and the first swing mechanism and the second swing mechanism are driven by the same motor to swing the screen, so that the screening is accelerated.

An automatic screening device of the present invention will be further described with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of an automatic screening device;

FIG. 2 is a top plan view of an automated screening device shown in FIG. 1;

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 5 is an enlarged view of FIG. 1;

FIG. 6 is an isometric view of FIG. 1;

FIG. 7 is an enlarged view of a portion of FIG. 2;

FIG. 8 is an enlarged partial view of FIG. 4;

fig. 9 is a partially enlarged view of fig. 1.

Detailed Description

Referring to fig. 1 to 9, referring to fig. 1 and 6, an automatic sieving apparatus includes a body 101 provided with a feed inlet 102;

a first screen 103 disposed in the machine body 101;

a storage tank 104 disposed at the bottom of the machine body 101 to store the screened material;

and a shaking mechanism 200 which moves the first screen 103 left and right by being driven by a motor 201.

According to the invention, the motor 201 drives the shaking mechanism 200 to move the first sieve 103 left and right, so that the materials in the first sieve 103 are driven to shake left and right and fall into the storage box, the materials are screened, the screening efficiency is improved by shaking left and right, the noise pollution is reduced, and the screened materials are more uniform.

A plurality of first blanking holes 801 are uniformly formed in the first sieve 103, and a person skilled in the art can adjust the size and the distance of the first blanking holes 801 by calculation, so that different materials can be used and different sizes can be screened.

Wherein, the feed inlet 102 is trumpet-shaped, which is convenient for feeding.

Wherein, the storage box 104 is arranged at the bottom of the machine body 101 and under the first sieve 103, which facilitates the collection of materials

A first screen is disposed in the first screen 103, and those skilled in the art can select different screens according to the size of the material.

The power module of the motor 201 comprises a battery, an electric control module and a wireless communication module, and the wireless communication module is in wireless connection with the user terminal.

According to the invention, through the wireless communication module, a user can directly control the rotation direction and the rotation speed of the motor 201, so that the screening efficiency is adjusted.

As a further explanation of this example, referring to fig. 1 and 6, the shaking mechanism 200 includes a motor 201, a motor output shaft 202, a first link 203, a first pin 204, a first support frame 205, a first elongated hole 206, a first support rod 207, a first guide rail 208, a first fixing rod 209;

the motor 201 is fixedly connected with the machine body 101, the motor output shaft 202 is fixedly connected with one end of the first connecting rod 203, one end of the first pin shaft 204 is installed at the other end of the first connecting rod 203 through a bearing, the other end of the first pin shaft 204 is configured in the first strip hole 206 and moves along the first strip hole, the first strip hole 206 is formed in the first supporting frame 205, the first supporting frame 205 is fixedly connected with the first supporting rod 207, the first supporting rod 207 moves along the first guide rail 208, the first guide rail 208 is fixedly connected with the machine body 101, the first supporting rod 207 is fixedly connected with the first fixing rod 209, and the first fixing rod 209 is connected with the first sieve 103.

According to the invention, the motor 201 drives the first connecting rod 203 to rotate, so that the first pin shaft 204 rotates and drives the first supporting frame 205 to move left and right, so that the first supporting rod 207 is driven to move left and right, the first sieve 103 moves left and right to drive materials in the first sieve to shake, and the filtering and screening efficiency is improved.

The first supporting rod 207 is provided with a dovetail-shaped sliding block, and the first guide rail 208 is provided with a dovetail groove.

Wherein, the first fixing rod 209 is fixedly connected with the first sieve 103.

As a further explanation of this example, referring to fig. 4 and fig. 7 to 8, the automatic sieving apparatus further includes a scraping mechanism 300, the scraping mechanism 300 includes a first rack 301, a first gear 302, a first rotating shaft 303, a shift lever 304, a first groove 305, a first convex tooth of a convex tooth 306, a first support plate 307, a second guide rail 308, a limiting rod 309, an arc-shaped groove 313, a disc 310, a second support rod 311, and a scraping plate 312;

the first support rod 207 is fixedly connected with the first rack 301, the first rack 301 is engaged with the first gear 302, the first gear 302 is coaxially fixed with the first rotating shaft 303, the first rotating shaft 303 is mounted on the machine body 101 through a bearing, the first rotating shaft 303 is fixedly connected with one end of the shift lever 304, the other end of the shift lever 304 is provided with an inward first groove 305, the first groove 305 can be attached to an outward first convex tooth 306, the first convex tooth 306 is arranged on the first support plate 307, the first support plate 307 moves along the second guide rail 308, the second guide rail 308 is fixed with the machine body 101, the first support plate 307 is fixedly connected with one end of the two limit rods 309, and an arc-shaped groove 313 arranged at the other end of one of the two limit rods 309 can be attached to an arc-shaped surface of the disc 310, the disc 310 is provided with the third groove 314, the center line of the third groove 314 coincides with the center line of the shift lever 304, the disc 310 is coaxially fixed with the first rotating shaft 303, the first support plate 307 is fixedly connected with one end of the second support rod 311, the other end of the second support rod 311 is connected with the scraper 312, and the scraper 312 is arranged in the first screen 103;

two groups of structural bodies consisting of the shifting lever 304, the first groove 305, the first convex tooth 306, the first supporting plate 307, the second guide rail 308, the limiting rod 309, the arc-shaped groove 313, the disc 310, the second supporting rod 311 and the scraper 312 are arranged in a central symmetry mode around the axis of the first rotating shaft 303.

According to the invention, the first support rod 207 moves left and right to drive the first rack 301 to move left and right to enable the first gear 302 to rotate, so that the first rotating shaft 303 rotates, the shift lever 304 can be attached to the first convex tooth 306 in the rotating process to enable the first support plate 307 to move back and forth to drive the scrapers 312 to move back and forth to turn over materials, the movement and rolling of the materials are promoted, the filtering and screening efficiency is improved, and the scrapers 312 of the other structure can change due to the rotating direction of the first gear 302, so that the movement directions of the two scrapers 312 are opposite, and the full shaking of the materials is facilitated.

The shape of the first groove 305 is u-shaped, the shape of the second groove 306 is similar to W-shaped, and the shape of the first groove 305 and the shape of the second groove 306 are matched to ensure that the shift lever 305 can shift the first support plate 307 to move.

Wherein, the two limit rods 309 are respectively located at two sides of the first convex tooth 306.

Wherein the disc 310 is provided with a third recess 314 ensuring that the restricting lever 309 can pass through this position when rotating.

The shift lever 304 is disposed on a center line of the third recess 314.

The other end of the second support rod 311 is fixedly connected with the scraper 312.

Wherein, first sieve 103 includes screen cloth and lateral wall, and the lateral wall is disposed around the screen cloth, places the material and leaks outward.

Wherein the scraper 312 can overlap the screen when the first screen 103 is moved to the uppermost position.

As a further explanation of this example, referring to fig. 9, the automatic screening device further comprises a rotation mechanism 400, the rotation mechanism 400 comprising a second rack 401, a second gear 402, a second rotation shaft 403, a first pulley 404, a first belt 405, a second pulley 406, a third rotation shaft 407, a first helical gear 408, a second helical gear 409, a fourth rotation shaft 410;

the second guide rail 308 is fixedly connected with the second rack 401, the second rack 401 is engaged with the second gear 402, the second gear 402 is coaxially fixed with the second rotating shaft 403, the second rotating shaft 403 is mounted on the second support rod 311 through a bearing, the second rotating shaft 403 is coaxially fixed with the first belt pulley 404, the first belt pulley 404 is in belt transmission connection with the second belt pulley 406 through the first belt 405, the second belt pulley 406 is coaxially fixed with the third rotating shaft 407, the third rotating shaft 407 is mounted on the second support rod 311 through a bearing, the third rotating shaft 407 is coaxially fixed with the first helical gear 408, the first helical gear 408 is engaged with the second helical gear, the second helical gear 409 is coaxially fixed with the fourth rotating shaft 410, and the fourth rotating shaft 410 is mounted on the second support rod 311 through a bearing, the fourth shaft 410 is fixedly connected to the scraper 312.

According to the invention, the second support rod 311 moves back and forth to drive the second gear 402 to rotate along the second rack 401, and the scraper 312 can rotate while moving back and forth through the transmission of the first belt pulley 404 and the second belt pulley 406 and the transmission of the first helical gear 408 and the second helical gear 409, so that materials are continuously turned over, the filtering and screening process is accelerated, the screening efficiency is improved, and material accumulation can be avoided.

Wherein, the fourth rotating shaft 410 is connected with the scraper 312 through a bearing.

As a further explanation of this example, referring to fig. 1 and 6, the automatic screening device further comprises a first swing mechanism 500, the first swing mechanism 500 comprising a third bevel gear 501, a fourth bevel gear 502, a crankshaft 510, a crankpin 503, a second connecting rod 504, a third support plate 505, a fifth rotating shaft 506, a square hole 507, a square shaft 508;

the motor output shaft 202 is coaxially fixed with the third bevel gear 501, the third bevel gear 501 is engaged with the fourth bevel gear 502, the fourth bevel gear 502 is coaxially fixed with the crankshaft 510, the crankshaft pin 503 of the crankshaft 510 is hinged with one end of the second connecting rod 504, one end of the second connecting rod 504 is hinged with one side of the third supporting plate 505, the other side of the third supporting plate 505 is provided with one end of the fifth rotating shaft 506 through a bearing, the fifth rotating shaft 506 is arranged on the machine body 101, the other end of the fifth rotating shaft 506 is provided with the square hole 507, one end of the square shaft 508 which moves along the square hole 507 and synchronously rotates is sleeved in the square hole 507, and the other end of the square shaft 508 is fixedly connected with the first sieve 103;

the structural bodies formed by the two sets of the fifth rotating shaft 506, the square holes 507 and the square shaft 508 are symmetrically arranged around the horizontal center line of the first screen 103.

According to the invention, the crankshaft 503 drives the second connecting rod 504 to swing through the transmission of the third bevel gear 501 and the fourth bevel gear 502, so that the first screen 103 can swing around the fifth rotating shaft 506 from bottom to top or from top to bottom, and the material in the first screen 103 is overturned, so that the material is more thoroughly turned, and the screening efficiency is improved.

The square shaft 508 and the square hole 507 are matched in shape, so that the first sieve 103 can move left and right and can swing.

As a further explanation of this example, referring to fig. 1, the automatic screening device further comprises a second oscillating mechanism 600, the second oscillating mechanism 600 comprises a fifth belt pulley 601, a third belt 602, a sixth belt pulley 603, a worm 604, a turbine 605, a seventh rotating shaft 606, a first crank 607, a third connecting rod 608, a first spring 610, a second screen 611;

the crankshaft 503 is coaxially fixed with the fifth belt pulley 601, the fifth belt pulley 601 is in belt driving connection with the sixth belt pulley 603 through a third belt 602, the sixth pulley 603 is coaxially fixed with the worm 604, one end of the worm 604 is mounted on the machine body 101 through a bearing, the other end of the worm 604 is engaged with the worm wheel 605, the worm wheel 605 is coaxially fixed with the seventh rotating shaft 606, the seventh rotating shaft 606 is mounted on the machine body 101 through a bearing, the seventh rotating shaft 606 is fixedly connected with one end of the first crank 607, the other end of the first crank 607 is hinged with the third connecting rod 608, the third connecting rod 608 is fixedly connected with one side of one end of the second sieve 611, the second sieve 611 is fixedly connected with one end of the first spring 610, and one end of the first spring 610 is fixedly connected with the machine body 101.

According to the invention, the crankshaft 503 rotates, and the seventh rotating shaft 606 rotates through the transmission of the fifth belt pulley 601 and the sixth belt pulley 603 and the transmission of the worm 604 and the turbine 605, so that the first crank drives the third connecting rod 608 to swing from bottom to top or from top to bottom, and the second screen 611 is driven to swing, and the material sieved by the first screen 103 is sieved again, so that the material to be sieved is sieved again sieved, and the material to be extracted is filtered.

A second screen is disposed in the second screen 611, and the second screen has a larger mesh size than the first screen in the first screen 103, and those skilled in the art can select different screens according to the size of the material.

As a further explanation of this example, referring to fig. 1 and 5, the automatic screening device further comprises an excess discharge mechanism 700, the excess discharge mechanism 700 comprising a third rack 701, a third gear 702, an eighth rotating shaft 703, a second crank 704, a fourth connecting rod 705, a guide sleeve 706, a fifth connecting rod 707, a second spring 708, a cover plate 709, a first through hole 710, the collection box 106;

the third connecting rod 608 is fixedly connected with the third rack 701, the third rack 701 is engaged with the third gear 702, the third gear 702 is coaxially fixed with the eighth rotating shaft 703, the eighth rotating shaft 703 is mounted on the machine body 101 through a bearing, the eighth rotating shaft 703 is fixedly connected with one end of the second crank 704, the other end of the second crank 704 is hinged with one end of the fourth connecting rod 705, the fourth connecting rod 705 moves along the guide sleeve 706, the guide sleeve 706 is bearing-connected with the machine body 101, the other end of the fourth connecting rod 705 is hinged with one end of the fifth connecting rod 707, the fifth connecting rod 707 is fixedly connected with one end of the second spring 708, the other end of the second spring 708 is fixedly connected with the machine body 101, the fifth connecting rod 707 is arranged in the first through hole 710 formed in the second screen 611, the collecting box 106 is arranged below the first through hole 710, the collecting box 106 is fixed to the machine body 101, the other end of the fifth connecting rod 707 can be attached to the cover plate 709, and the cover plate 709 is connected with the bottom of the second sieve 611 through a hinge.

According to the invention, as the weight of the material collected by the second screen 611 changes, when the weight of the collected material generates gravity, the first spring 610 is stretched, so that the second screen 611 descends, and when the descending height falls to the state that the third rack 701 can be meshed with the third gear 702, so that the second crank 704 is driven to rotate, the fourth connecting rod 705 drives the fifth connecting rod 707 to swing from left to right, the cover plate 709 is jacked up, the material accumulated in the second screen 611 is leaked, and the low screening efficiency caused by the accumulated material is effectively reduced.

Wherein, the third rack 701 is fixedly connected with the second sieve 611.

Wherein, the second sieve 611 comprises a screen and a side wall, the side wall is configured around the screen and prevents the material from leaking.

Wherein the cover plate 709 is disposed opposite to the first through hole 710 and the first through hole 710 is sealed with the second screen 611.

As a further explanation of this example, referring to fig. 8, the first support plate 307 is provided with a dovetail slider, and the second guide rail 308 is provided with a dovetail groove.

The present invention ensures that the first support plate 307 can move forward and backward without moving left and right.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.