Separating device for corn harvesting

Abstract

The utility model discloses a separating device for corn harvesting, which relates to the technical field of corn harvesting and separating and comprises a collecting mechanism, a filtering mechanism is fixedly mounted at the top of the collecting mechanism, and a feeding mechanism is fixedly mounted at the upper end of one side of the collecting mechanism. By the adoption of the structure, the driving motor is started to drive the feeding conveying belt guide roller to rotate, corn cobs are stably conveyed to the upper end of the inclined filter screen, the filter screen filters and guides materials to slide downwards, efficient screening is achieved, and during the period, the electric push rod drives the scraper to move at the top of the filter screen, the blocking probability is reduced, and when the filter screen needs to be overhauled, the filter screen is not damaged. The limiting frame on the outer side of the drawing frame is adjusted to move outwards, the sliding frame is driven to stretch the limiting spring, the sliding frame is drawn after the limiting spring is separated from the clamping groove, the filter screen can be rapidly drawn out for replacement, after replacement, the limiting spring resets to enable the limiting frame to be clamped into the clamping groove, installation is completed, the use convenience and stability of the device are improved, and follow-up maintenance is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of corn harvesting and separating, particularly relates to a separating device for corn harvesting. BACKGROUND

[0002] In the field of agricultural production, corn harvesting is an important link to guarantee the yield and quality of grain, corn harvesting refers to a series of farming operations for obtaining corn from the field when corn grows to the mature stage, that is, the leaves of corn plants turn yellow and dry, the bract leaves of corn are loose and the color is lighter, and the moisture content of corn kernels reaches the appropriate harvesting standard, the harvesting method covers traditional manual and modern mechanical methods, manual harvesting relies on manpower to hold a sickle to cut down corn plants one by one and manually pick corn cobs, although it is flexible, but the efficiency is low and the labor intensity is great, mechanical harvesting can complete plant cutting, ear picking, straw crushing and returning to the field and other operations at one time by means of a corn harvester, greatly improves the harvesting efficiency and reduces the labor cost, and becomes a widely used method in modern large-scale agriculture.

[0003] After corn harvesting is completed, the separation and collection of corn kernels are very important, in the prior art, a separating device for corn harvesting disclosed in Chinese patent with publication number "CN218104200U" provides convenience for the separation and collection of corn kernels to a certain extent, the device comprises a collection box, an inclined conveying belt is arranged in the box, an inclined material guide frame is communicated with the outer side wall, a servo motor is started by a controller, the conveying belt can send corn cobs and husks in the collection box to the direction of the material guide frame, the corn cobs are made to fall back into the collection box by gravity, the lighter husks are sent into the material guide frame and are blown away under the action of a fan, residual corn kernels fall into the recovery box through the through hole, and the buffer strip can hinder the sliding of the corn kernels to facilitate the entry of the corn kernels into the recovery box.

[0004] However, such a device has significant defects in actual use, because the sizes of corn kernels are different, although the filter screen in the device has a certain filtering function, in specific application, larger corn kernels are easily stuck on the filter screen, in order to ensure normal operation of the device, the filter screen needs to be regularly disassembled and repaired, but the filter structure at the top of the recovery box of the device is poorly designed, the disassembly process is extremely inconvenient, which leads to complicated and tedious subsequent maintenance and cleaning work, seriously affects the work efficiency and the continuous and efficient operation of the equipment, therefore, the existing corn kernel separation and collection device needs to be innovatively improved and designed. UTILITY MODEL CONTENTS

[0005] In view of the problems mentioned in the background art, the utility model aims to provide a separating device for corn harvesting to solve the problem of inconvenient maintenance during application of the prior art.

[0006] The above technical purpose of the utility model is realized by the following technical scheme:

[0007] The utility model provides a corn harvesting separating device, including collection mechanism, the top of collection mechanism is fixedly installed with filter mechanism, the upper end of one side of collection mechanism is fixedly installed with feeding mechanism,

[0008] The collection mechanism includes a collection box, the feeding mechanism is installed on the upper end of one side of the collection suction pipe, the collection mechanism is fixedly connected to the top of the collection box, a notch is formed in the front of the collection box, sliding grooves are formed in the upper ends of the two sides of the notch, an installation plate is slidably connected to the inside of the sliding groove, a collection drawer is fixedly installed on the inner side of the installation plate, a sealing plate is fixedly installed on the front of the collection drawer, and the sealing plate covers the front of the notch.

[0009] As a preferred technical solution, the middle of the two sides of the sealing plate is fixedly connected with an installation arm, the outer end of the installation arm is threadedly connected with an installation screw rod, and the end of the installation screw rod penetrates through the installation arm.

[0010] As a preferred technical solution, a limiting hole is formed in the middle of the front end of the collection box, the inner end of the installation screw rod is inserted into the limiting hole, and a notch is formed in the middle of the front of the sealing plate.

[0011] As a preferred technical solution, the filter mechanism includes guide rails, the guide rails are fixedly installed on the top of the collection box on both sides, the guide rails are inclinedly arranged, the guide rails are inclinedly arranged upwards towards the feeding mechanism, a limiting assembly is fixedly connected to the upper end of the outer side of the guide rail, a sliding frame is slidably connected to the inside of the guide rail, a filter screen is fixedly connected to the inner side of the sliding frame, and the limiting assembly and the sliding frame are clamped.

[0012] As a preferred technical solution, the limiting assembly includes a frame and a clamping groove, the frame is fixedly connected to the upper end of the outer side of the guide rail, a limiting spring is fixedly connected to the inside of the frame, the outer end of the limiting spring is fixedly connected with a movable plate, the movable plate is slidably connected to the inside of the frame, a limiting frame is fixedly connected to the outer side of the movable plate, the clamping groove is formed in the upper end of the two sides of the collection box, and the end of the limiting frame is inserted into the inside of the clamping groove.

[0013] As a preferred technical solution, the feeding mechanism includes a support arm, the support arm is fixedly connected to the upper end of one side of the collection box close to the limiting assembly, a frame body is fixedly installed on the top of the support arm, a feeding transmission belt is rotatably connected to the inside of the frame body, a driving motor is fixedly connected to the upper end of the front of the frame body, guide rollers are rotatably connected to the inside of the frame body at both ends, the feeding transmission belt is transmissionally connected to the outer surface of the guide rollers, the output end of the driving motor is connected with the guide rollers at the upper end of the transmission belt, and a cleaning assembly is fixedly connected to the side of the upper end of the frame body close to the filter screen.

[0014] As a preferred technical scheme, the cleaning assembly comprises a bottom plate fixedly connected to one side of the frame body close to the collecting box, a front surface of the bottom plate is fixedly connected with an electric push rod, an output end of the electric push rod is fixedly connected with a scraper plate penetrating through the bottom plate, and the bottom of the scraper plate is connected with the top of the filter screen.

[0015] To sum up, the utility model mainly has the following beneficial effects:

[0016] First, by setting the collecting mechanism, after the filter screen of the filtering mechanism separates the corn kernels from the corn cobs during use, the corn kernels can fall into the collecting box and be received by the collecting drawer, after the collecting drawer is full, the operator twists the mounting screw on the mounting arm to disengage from the limiting hole, pries the sealing plate by the prying groove, so that the mounting plate can be pulled out of the slot, the collecting drawer can be quickly taken out of the slot, the replacement is completed, the corn kernels are conveniently taken out, when reinstalling, the mounting plate is inserted into the slot, the screw is twisted into the limiting hole, the sealing plate and the collecting drawer can be quickly installed, the use convenience of the device is greatly improved, and efficient collection is easily realized.

[0017] Second, the device innovatively combines the feeding mechanism and the filtering mechanism, has excellent performance, and drives the motor to rotate the feeding transmission belt guide roller, the corn cobs are stably conveyed to the upper end of the inclined filter screen, the filter screen filters and guides the material to slide downward, efficient screening is realized, during the period, the electric push rod drives the scraper plate to move on the top of the filter screen, so that the blocking probability is reduced, when the filter screen needs to be maintained, the limiting frame on the outer side of the pulling frame is adjusted to move outward, drives the sliding frame to stretch the limiting spring, and after the sliding frame is pulled out of the clamping groove, the filter screen can be quickly pulled out for replacement, after replacement, the limiting spring is reset to make the limiting frame clamped into the clamping groove, installation is completed, the use convenience and stability of the device are improved, and subsequent maintenance is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is a schematic diagram of the top view structure of the utility model;

[0020] Figure 3 is a schematic diagram of the disassembled state structure of the utility model;

[0021] Figure 4 is a schematic diagram of the rear view structure of the utility model;

[0022] Figure 5 is the A enlarged structure schematic diagram of the utility model Figure 4 .

[0023] Label: 1, collection mechanism; 11, collection box; 12, notch; 13, sliding groove; 14, mounting plate; 15, collection drawer; 16, sealing plate; 17, mounting arm; 18, mounting screw; 19, limiting hole; 2, filtering mechanism; 21, guide rail; 22, limiting assembly; 221, frame; 222, clamping groove; 223, limiting spring; 224, movable plate; 225, limiting frame; 23, sliding frame; 24, filter screen; 3, feeding mechanism; 31, support arm; 32, frame; 33, feeding conveyor belt; 34, drive motor; 35, cleaning assembly; 351, bottom plate; 352, electric push rod; 353, scraper. DETAILED DESCRIPTION

[0024] EMBODIMENT

[0025] REFERENCE Figures 1 to 4 The corn harvesting and separating device comprises a collection mechanism 1, a filtering mechanism 2 fixedly installed at the top of the collection mechanism 1, and a feeding mechanism 3 fixedly installed at the upper end of one side of the collection mechanism 1.

[0026] The collection mechanism 1 comprises a collection box 11, the feeding mechanism 3 is installed at the upper end of one side of the collection suction pipe, the collection mechanism 1 is fixedly connected to the top of the collection box 11, a notch 12 is formed in the front of the collection box 11, sliding grooves 13 are formed in the upper ends of the two sides of the notch 12, a mounting plate 14 is slidably connected in the sliding grooves 13, a collection drawer 15 is fixedly installed on the inner side of the mounting plate 14, a sealing plate 16 is fixedly installed on the front of the collection drawer 15, and the sealing plate 16 covers the front of the notch 12. After the feeding mechanism 3 is started, the corn cob is transmitted to the filtering mechanism 2 at the top, the filter screen 24 in the filtering mechanism 2 plays a role in accurately separating the corn cob and the corn kernel, the corn kernel falls into the collection mechanism 1 below through the filter screen 24, the core of the collection mechanism 1 is the collection box 11, the sliding grooves 13 are arranged at the upper ends of the two sides of the notch 12 in the front of the collection box 11, the mounting plate 14 slides in the sliding grooves 13, the collection drawer 15 fixedly installed on the inner side of the mounting plate 14 is used for receiving the filtered corn kernel, when the collection drawer 15 is full, the mounting plate 14 can be pulled out of the sliding grooves 13 to drive the collection drawer 15 and the sealing plate 16 on the front to separate from the notch 12, replacement is completed, the corn kernel is conveniently taken out, the feeding mechanism 3 continuously supplies the corn cob during the whole process, the filtering mechanism 2 continuously separates, the collection mechanism 1 stably collects, and the mechanisms work cooperatively to realize efficient separation and collection after corn harvesting.

[0027] REFERENCE Figures 1-3The middle of two sides of the sealing plate 16 is fixedly connected with the mounting arm 17, the outer end of the mounting arm 17 is threadedly connected with the mounting screw 18, the end of the mounting screw 18 penetrates through the mounting arm 17, the middle of the front end of the collecting box 11 is provided with the limiting hole 19, the inner end of the mounting screw 18 is inserted into the inside of the limiting hole 19, the front surface of the sealing plate 16 is provided with the notch, the outer end of the mounting arm 17 is threadedly connected with the mounting screw 18, the end of the mounting screw 18 can penetrate through the mounting arm 17, the middle of the front end of the collecting box 11 is provided with the limiting hole 19, and the inner end of the mounting screw 18 is matched with the limiting hole 19, when it is necessary to fix the sealing plate 16 and ensure that the front surface of the collecting box 11 is closed, the inner end of the mounting screw 18 is inserted into the limiting hole 19, the mounting screw 18 is rotated, the fastening effect of the threaded connection is utilized, the sealing plate 16 is tightly attached to the front surface of the collecting box 11, the notch in the middle of the front surface of the sealing plate 16 is provided for the convenience of dismounting the sealing plate 16 and the collecting drawer 15 connected with the sealing plate 16, when the collecting drawer 15 is full of corn kernels and needs to be taken out, the fingers of an operator can be buckled into the notch, a pulling force is applied, the mounting screw 18 is rotated outward, the inner end of the mounting screw 18 is separated from the limiting hole 19, at this time, the sealing plate 16 can be smoothly pulled out, the mounting plate 14 is driven to be pulled out from the sliding groove 13, the collecting drawer 15 is taken out from the notch 12, and the replacement operation is completed.

[0028] Reference Figures 1-5The filtering mechanism 2 comprises guide rails 21 fixedly installed on the top of the collecting box 11, the guide rails 21 are inclinedly arranged, the guide rails 21 are inclinedly arranged upwards towards the feeding mechanism 3, the outer upper end of the guide rails 21 is fixedly connected with a limiting assembly 22, the inner side of the guide rails 21 is slidably connected with a sliding frame 23, the inner side of the sliding frame 23 is fixedly connected with a filter screen 24, the limiting assembly 22 is clamped with the sliding frame 23, the limiting assembly 22 comprises a frame 221 and a clamping groove 222, the frame 221 is fixedly connected with the outer upper end of the guide rails 21, the inner side of the frame 221 is fixedly connected with a limiting spring 223, the outer end of the limiting spring 223 is fixedly connected with a movable plate 224, the movable plate 224 is slidably connected with the inner side of the frame 221, the outer side of the movable plate 224 is fixedly connected with a limiting frame 225, the clamping groove 222 is arranged on the upper end of the two sides of the collecting box 11, the end of the limiting frame 225 is inserted into the inner side of the clamping groove 222, in the filtering mechanism 2 of the device, the guide rails 21 are fixedly installed on the top of the collecting box 11 and are inclinedly arranged upwards towards the feeding mechanism 3, the feeding mechanism 3 transmits the corn cob to the filter screen 24, the inclined guide rails 21 facilitate the screening of the corn cob and the corn kernel under the action of gravity and self-sliding, the corn kernel passes through the filter screen 24 and falls into the collecting box 11, the limiting assembly 22 at the outer upper end of the guide rails 21 is used for fixing the sliding frame 23 and the filter screen 24, the frame 221 is fixed at the outer upper end of the guide rails 21, the outer end of the limiting spring 223 in the frame 221 is connected with the movable plate 224, the movable plate 224 can slide in the frame 221, the limiting frame 225 on the outer side of the movable plate 224 is matched with the clamping groove 222 arranged on the upper end of the two sides of the collecting box 11, when installing, the sliding frame 23 together with the filter screen 24 is slid along the guide rails 21 into the appropriate position, the limiting spring 223 pushes the movable plate 224 and the limiting frame 225, so that the end of the limiting frame 225 is inserted into the clamping groove 222, thereby realizing stable clamping and ensuring that the filter screen 24 is firmly installed, when it is necessary to disassemble, overhaul or replace the filter screen 24, the limiting frame 225 is pulled outwards, the limiting spring 223 is compressed, so that the end of the limiting frame 225 is separated from the clamping groove 222, and then the sliding frame 23 together with the filter screen 24 can be pulled out from the guide rails 21, thereby facilitating replacement.

[0029] Reference Figures 1-4The feeding mechanism 3 comprises a support arm 31 fixedly connected to one side of the collecting box 11 near the limiting assembly 22, a frame body 32 fixedly installed on the top of the support arm 31, an upper feeding transmission belt 33 rotatably connected in the frame body 32, a driving motor 34 fixedly connected to the front upper end of the frame body 32, guide rollers rotatably connected to both ends in the frame body 32, the upper feeding transmission belt 33 drivingly connected to the outer surfaces of the guide rollers, the output end of the driving motor 34 connected to the guide roller at the upper end of the transmission belt, a cleaning assembly 35 fixedly connected to one side of the upper end of the frame 221 near the filter screen 24, the cleaning assembly 35 comprising a bottom plate 351 fixedly connected to one side of the lower end of the frame body 32 near the collecting box 11, an electric push rod 352 fixedly connected to the front of the bottom plate 351, a scraper 353 fixedly connected to the output end of the electric push rod 352 penetrating through the bottom plate 351, the bottom of the scraper 353 abuttingly connected to the top of the filter screen 24, during use, the driving motor 34 can be started, the output end of the driving motor 34 driving the guide roller at the upper end of the upper feeding transmission belt 33 to rotate, since the upper feeding transmission belt 33 drivingly connected to the outer surfaces of the two guide rollers, the upper feeding transmission belt 33 stably operates in the frame body 32, the corn cob placed on the upper feeding transmission belt 33 is stably conveyed to one side of the frame body 32 near the filter screen 24 along with the rotation of the transmission belt, and then falls onto the filter screen 24 arranged obliquely below, at the same time, the cleaning assembly 35 at one side of the lower end of the frame body 32 works in cooperation, the bottom plate 351 fixedly connected to one side of the lower end of the frame body 32 near the collecting box 11, the electric push rod 352 installed on the front of the bottom plate 351, the output end of the electric push rod 352 penetrating through the bottom plate 351 connected to the scraper 353, when the filtering process starts, the electric push rod 352 is started, the output end of the electric push rod 352 performs telescopic movement, driving the scraper 353 to move back and forth on the top of the filter screen 24, since the bottom of the scraper 353 abuttingly connected to the top of the filter screen 24, the corn kernels or impurities possibly blocking the mesh of the filter screen 24 can be effectively removed through the scraping of the scraper 353, the normal filtering function of the filter screen 24 is ensured, the efficient separation of the corn cob and the corn kernels is ensured, and the whole device continuously and stably operates.

[0030] Principle and advantages: The collecting mechanism 1 of the device greatly improves the convenience and efficiency of corn kernel collection. In actual use, the filter screen 24 of the filtering mechanism 2 can accurately separate and filter corn kernels and corn cobs. The filtered corn kernels fall into the collection box 11, and then the collection drawer 15 collects them. When the collection drawer 15 is full of corn kernels and needs to be removed to take out the corn kernels, the operator only needs to twist the installation screw 18 on the installation arm 17 to make the installation screw 18 move outward and away from the limiting hole 19. At this time, by prying the slot, the sealing plate 16 in front of the collection drawer 15 is pulled out, and the collection drawer 15 is easily pulled out, so that the mounting plate 14 is pulled out from the inside of the sliding groove 13. In this way, the collection drawer 15 can be quickly pulled out from the slot 12, realizing the operation of quickly replacing the collection drawer 15, and conveniently and quickly taking out the corn kernels in the collection drawer 15. This design makes the device easily and efficiently complete the collection of corn kernels during use. When reinstalling, the mounting plate 14 is inserted into the inside of the sliding groove 13, and the installation screw 18 is twisted to be inserted into the limiting hole 19, which can quickly assist in installing the sealing plate 16 and the collection drawer 15, greatly improving the convenience of device use;

[0031] The device combines the feeding mechanism 3 and the filtering mechanism 2 to exhibit excellent performance in actual application. When using, the driving motor 34 is started to drive the guide roller inside the feeding transmission belt 33 to rotate, thereby driving the feeding transmission belt 33 to stably rotate inside the frame 32. With the rotation of the feeding transmission belt 33, the corn cobs carried on the outer surface thereof are smoothly conveyed and fall onto the upper end of the inclined filter screen 24. The inclined filter screen 24 not only effectively filters corn cobs and corn kernels, but also guides them to slide downward, realizing efficient filtering and screening. During the filtering and screening process, the electric push rod 352 is started to move the scraper 353 back and forth on the top of the filter screen 24, thereby effectively reducing the probability of the filter screen 24 being blocked and ensuring smooth filtering work;

[0032] When the filter screen 24 of the filtering mechanism 2 needs to be disassembled and maintained, the operator can adjust the limiting frame 225 outside the pull-out frame 221 to move outward, the movement of the limiting frame 225 drives the sliding frame 23 to move outward, and then stretches the limiting spring 223 to be in the stretched state, after the end of the limiting frame 225 is separated from the clamping groove 222, the sliding frame 23 can be easily pulled to slide in the guide rail 21, the sliding frame 23 together with the filter screen 24 is pulled out from the inside of the guide rail 21, the quick replacement of the filter screen 24 is realized, after the replacement is completed, the sliding frame 23 is reinserted into the guide rail 21, when the limiting frame 225 moves to the position of the clamping groove 222, the limiting spring 223 is reset, the limiting frame 225 is pulled to move inward and is inserted into the clamping groove 222, through the close clamping and limiting of the limiting frame 225 and the clamping groove 222, the installation of the guide rail 21 and the filter screen 24 inside is quickly completed, this design not only improves the convenience and stability of the device in use, but also makes the replacement of the filter screen 24 more convenient, and provides great convenience for the subsequent maintenance work of the device.

Claims

1. A separating device for corn harvesting, comprising a collecting mechanism (1), characterized in that: The top of the collecting mechanism (1) is fixedly installed with a filtering mechanism (2), and the upper end of one side of the collecting mechanism (1) is fixedly installed with a feeding mechanism (3); The collecting mechanism (1) comprises a collecting box (11), the feeding mechanism (3) is installed on the upper end of one side of the collecting suction pipe, the collecting mechanism (1) is fixedly connected to the top of the collecting box (11), the front of the collecting box (11) is provided with a notch (12), both sides of the notch (12) are provided with a sliding groove (13) at the upper end, the sliding groove (13) is slidably connected with a mounting plate (14), the inner side of the mounting plate (14) is fixedly installed with a collecting drawer (15), the front of the collecting drawer (15) is fixedly installed with a sealing plate (16), and the sealing plate (16) covers the front of the notch (12).

2. A corn harvesting separating apparatus according to claim 1 wherein: Both sides of the sealing plate (16) are fixedly connected with mounting arms (17), the outer ends of the mounting arms (17) are threadedly connected with mounting screws (18), and the ends of the mounting screws (18) penetrate through the mounting arms (17).

3. A corn harvesting separating apparatus according to claim 2 wherein: The front end of the collecting box (11) is provided with a limiting hole (19) in the middle, the inner end of the mounting screw (18) is inserted into the limiting hole (19), and the front of the sealing plate (16) is provided with a notch.

4. A corn harvesting separating apparatus according to claim 1 wherein: The filtering mechanism (2) comprises guide rails (21), the guide rails (21) are fixedly installed on both sides of the top of the collecting box (11), the guide rails (21) are inclined, the guide rails (21) are inclined upwards towards the feeding mechanism (3), the outer side of the guide rail (21) is fixedly connected with a limiting assembly (22), the inside of the guide rail (21) is slidably connected with a sliding frame (23), the inner side of the sliding frame (23) is fixedly connected with a filter screen (24), and the limiting assembly (22) and the sliding frame (23) are connected.

5. A maize harvesting separating apparatus according to claim 4, wherein: The limiting assembly (22) comprises a frame (221) and a clamping groove (222), the frame (221) is fixedly connected to the outer side of the upper end of the guide rail (21), the inside of the frame (221) is fixedly connected with a limiting spring (223), the outer end of the limiting spring (223) is fixedly connected with a movable plate (224), the movable plate (224) is slidably connected to the inside of the frame (221), the outer side of the movable plate (224) is fixedly connected with a limiting frame (225), the clamping groove (222) is provided on both sides of the upper end of the collecting box (11), and the end of the limiting frame (225) is inserted into the inside of the clamping groove (222).

6. A maize harvesting separating apparatus according to claim 5, wherein: The upper feeding mechanism (3) includes a supporting arm (31) fixedly connected to one side of the upper end of the collecting box (11) close to the limiting assembly (22), a frame body (32) fixedly installed on the top of the supporting arm (31), an upper feeding transmission belt (33) rotatably connected to the inside of the frame body (32), a driving motor (34) fixedly connected to the front upper end of the frame body (32), guide rollers rotatably connected to the inside of the frame body (32) at both ends, the upper feeding transmission belt (33) drivingly connected to the outer surface of the guide rollers, the output end of the driving motor (34) connected to the guide rollers at the inner upper end of the transmission belt, and a cleaning assembly (35) fixedly connected to one side of the upper end of the frame (221) close to the filter screen (24).

7. A maize harvesting separating apparatus according to claim 6, wherein: The cleaning assembly (35) includes a bottom plate (351) fixedly connected to one side of the lower end of the frame body (32) close to the collecting box (11), an electric push rod (352) fixedly connected to the front of the bottom plate (351), a scraper (353) fixedly connected to the output end of the electric push rod (352) penetrating through the bottom plate (351), and the bottom of the scraper (353) in abutting connection with the top of the filter screen (24).

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