A low-damage threshing test bench for reciprocating twisting of corn cobs

Abstract

The application discloses a kind of broken corn ear reciprocating torsion type low-damage threshing test bed, to overcome the problem of high grain damage rate of existing corn threshing device.The test bed includes upper floating plate assembly, lower moving plate assembly and rack assembly.The upper floating plate assembly is equipped with weight disc, and the external force exerted on the broken corn ear by the threshing device can be adjusted by the weight.The lower moving plate assembly is fixed to the rack assembly by slide rail, and is relatively slidable with respect to the rack assembly using a motor to provide power.The rotating plate can rotate around the center under the action of shaft, adjusting plate and multi-section shaft, and the rotating amplitude is adjustable.The reciprocating and torsional external force is applied to the surface of the broken corn ear to achieve corn kernel peeling.The rack assembly serves as the base, supports the entire structure, and the inclination angle is adjustable.The threshing process is impact-free and extrusion-free, which can greatly reduce the corn kernel damage rate during threshing, and is of great significance to improve the quality of corn threshing.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of agricultural machinery corn threshing, more precisely, the present application relates to a kind of broken corn ear reciprocating torsion type low-damage threshing test bed. BACKGROUND

[0002] Corn threshing is a key link of mechanized harvesting of corn, and has a significant impact on the quality of harvest. The current market corn threshing device generally adopts the design of cylinder type, including beating type, extrusion type and rubbing type threshing method. These methods realize threshing by applying external force exceeding the bearing capacity of the outer surface of corn kernels, resulting in high corn kernel damage rate. Damaged corn kernels are prone to mold in a humid environment, and the toxins produced, such as aflatoxin, pose a threat to human health, and broken kernels are also difficult to germinate, thereby affecting grain yield. In order to solve these problems, researchers have designed and manufactured a corn ear core shaft internal bulging and cracking pre-threshing device in the early stage, which cracks the complete corn ear into small pieces by internal bulging of the core shaft, to reduce the kernel damage rate in the subsequent threshing process. It is particularly important to peel off the surface kernels in a low-damage or even non-damage way for the broken corn ear formed after the core shaft internal bulging pretreatment. Therefore, to solve the above problems, it is of great significance to invent a kind of broken corn ear reciprocating torsion type low-damage threshing test bed. SUMMARY

[0003] The technical problem to be solved by the present application is the high kernel damage rate in the existing technology during the threshing process of high-moisture corn. A broken corn ear reciprocating torsion type low-damage threshing test bed is provided.

[0004] A kind of broken corn ear reciprocating torsion type low-damage threshing test bed, including upper floating plate assembly, lower moving plate assembly and rack assembly;

[0005] The upper floating plate assembly is located at the uppermost end of the entire broken corn ear reciprocating torsion type low-damage threshing test bed, and is fixed to the rack assembly by bolts at four corners. The lower moving plate assembly is located directly below the upper floating plate assembly, and the main body is fixed to the rack assembly by sliding rails, which can slide relatively with the rack assembly. The rack assembly is the base body of the entire broken corn ear reciprocating torsion type low-damage threshing test bed, and is located at the lowermost end of the entire test bed. The main body is welded by rectangular section steel pipe and steel plate.

[0006] The upper floating plate assembly includes a weight disc, an outer support frame, four springs, four spring columns, four adjusting bolts, a floating plate mounting bracket, a floating plate, a plurality of round protrusions and four fixing blocks.

[0007] The weight disc is composed of a bottom plate with a length of 420 mm, a width of 480 mm and a thickness of 10 mm and four outer support plates vertically welded on the bottom plate, the four outer support plates are all 280 mm long, 50 mm high and 5 mm wide, the long edges of the four outer support plates are vertically welded on the bottom plate with the long edges downward and the four outer support plates enclose a square-sectioned groove; each of the four corners of the bottom plate is provided with a circular through hole for passing through a spring column; the groove enclosed by the four outer support plates on the upper end surface is used for placing the weight to change the downward pressure of the whole upper floating plate assembly;

[0008] The outer support frame is located at the four corners of the outside of the weight disc, the groove enclosed by the four outer support plates on the weight disc is located in the middle hollow part of the outer support frame, the outer support frame is integrally welded by rectangular-sectioned steel plates, each of the four corners of the outer support frame is provided with two circular through holes, the four through holes are grouped into four groups, the four groups of through holes are located inside and outside, the four through holes inside are used for placing the four spring columns; the four through holes outside are used for being fixed by bolts and four fixing blocks;

[0009] The four springs are all installed on the upper ends of the four spring columns and are distributed at the four corners of the outer support frame, the lower end surface of the spring is in contact with the upper end surface of the outer support frame, the upper end surface of the spring is in contact with the gasket below the nut installed on the uppermost end of the spring column, the adjusting nut can adjust the tightness of the spring, and then the elastic force of the floating plate mounting frame and the floating plate connected with the weight disc relative to the outer support frame during the up-down movement of the floating plate mounting frame and the floating plate can be adjusted;

[0010] The four spring columns are distributed at the four corners of the outer support frame, the four spring columns are integrally turned by cylindrical 45# steel, the upper section is 16 mm in diameter, the middle section is 35 mm in diameter and the lower section is 20 mm in diameter, the upper and lower sections are both threaded; the upper section passes through the weight disc and the outer support frame, and is provided with the spring, the nut and the gasket for fixing the upper end surface of the spring; the lower section is fixed in the threaded hole at the upper end surface of the floating plate mounting frame;

[0011] The four adjusting bolts are distributed at the outer ends of the four spring columns at the four corners of the outer support frame, the upper ends of the four adjusting bolts are fixed by two nuts distributed at the upper and lower ends of the outer support frame, the lower ends of the four adjusting bolts are fixed by the threaded holes on the upper end surfaces of the four fixing blocks and the fixing blocks; the four adjusting bolts can adjust the elastic force of the outer support frame relative to the weight disc and the like;

[0012] The floating plate mounting frame is integrally welded by steel plates, three threaded holes are respectively opened at the front, the rear, the left and the right of the floating plate mounting frame, the three threaded holes are used for being fixed by the floating plate through bolts; one threaded hole is opened at each of the four corners of the support plate inside, and the four threaded holes are used for fixing the four spring columns;

[0013] The floating plate is processed by a transparent plastic plate with a thickness of 20 mm, three threaded holes are opened at each of the four edges of the floating plate, the floating plate is fixed below the floating plate mounting frame by bolts; a plurality of threaded holes are opened in the middle of the floating plate, one round head protrusion is fixed in each threaded hole; the inside of the floating plate can be observed through the floating plate;

[0014] The several round head protrusions are composed of a threaded rod, a semicircular head welded at the end of the threaded rod, and a rubber outer sleeve wrapped on the surface of the semicircular head, and the front end of the threaded rod is fixed in a threaded hole on the floating plate;

[0015] The four fixing blocks are arranged below the four corners of the outer support frame, are integrally welded from a rectangular steel plate, have a total height of 170 mm, a length of 80 mm, and a width of 50 mm, are enclosed by five surfaces, have an opening on the largest surface, have a threaded hole with a diameter of 24 mm on the upper end surface, and are fixed by an adjusting bolt; and have two circular through holes with a diameter of 13 mm symmetrically arranged on the lower end surface, and are fixed on the upper end of the rack assembly by bolts.

[0016] The lower moving plate assembly comprises a fixed plate, a rotating plate, a connecting disc, a mounting disc, a rotating shaft, a fixing seat, a mounting plate, a shaft sleeve, an adjusting plate, a multi-section shaft, a fixing bearing, a fixing frame, double vertical plates, slide rails, a motor, a speed reducer, a connector, an eccentric disc, and a double-head connecting shaft.

[0017] The fixed plate is processed from a rectangular steel plate with a thickness of 20 mm, a length of 650 mm, and a width of 400 mm, has a circular through hole with a diameter of 340 mm cut out at the middle position of the upper and lower end surfaces, has through holes for placing countersunk bolts arranged around the upper end surface, is fixed on the fixing frame by bolts, has height-80-mm guard plates welded on the left and right sides, and has several round head protrusions mounted on the upper end surface at equal intervals.

[0018] The rotating plate is a disc-shaped steel plate with a diameter of 340 mm and a thickness of 20 mm, has several round head protrusions distributed on the upper end surface at equal intervals, is embedded in the circular through hole cut out in the fixed plate, and can rotate relative to the fixed plate, and has four through holes for placing countersunk bolts arranged at the edge of the upper end surface, and can be fixed on the connecting disc by the countersunk bolts.

[0019] The connecting disc is a steel plate with a diameter of 340 mm and a thickness of 8 mm, has several threaded holes arranged on the upper and lower end surfaces, is fixed on the rotating plate by bolts on the upper end surface, and is fixed on the upper end surface of the mounting disc by bolts on the lower end surface.

[0020] The mounting disc is a circular steel plate with a diameter of 155 mm and a thickness of 12 mm, has several bolt holes arranged on the upper and lower end surfaces, is fixed on the lower end surface of the connecting disc by bolts on the upper end surface, and is fixed on the upper end surface of the rotating shaft by welding on the lower end surface.

[0021] The rotating shaft is composed of two sections with different diameters, the upper section has a diameter of 40 mm and a length of 65 mm, the lower section has a diameter of 30 mm and a length of 50 mm, has a key groove, has a threaded hole with a diameter of 10 mm on the lower end surface, is fixed on the lower end surface of the mounting disc by welding on the upper end surface, is fixed on the shaft sleeve by a flat key, and is fixed on the lower end surface of the shaft sleeve by the adjusting plate and a gasket through bolts.

[0022] The fixed seat is a cylinder with a height of 25mm, an outer diameter of 120mm, and an inner diameter of 70mm, and four circular through holes with a diameter of 10mm are opened on the upper and lower end faces and fixed on the upper end face of the mounting plate by bolts; a bearing is installed inside, and the inside of the bearing contacts the upper section of the rotating shaft;

[0023] The mounting plate is processed from a steel plate with a thickness of 10mm, a circular through hole with a diameter of 80mm is opened in the middle, and the left and right end faces are fixed between the two steel pipes welded in the middle of the end face of the fixed frame by welding;

[0024] The shaft sleeve is a cylinder with a height of 40mm, an outer diameter of 50mm, and an inner diameter of 30mm, a key groove is opened on the inner side, and the lower end is fixed with the rotating shaft by a flat key; the lower end face is fixed on the end of the upper end face of the adjusting plate by welding;

[0025] The adjusting plate is entirely processed by cutting from a steel plate with a thickness of 10mm, the rear end is wider, and the front end is narrower; the shaft sleeve is fixed on the upper end face of the rear end by welding, and six circular through holes with a diameter of 17mm are opened at equal intervals on the front end to install the multi-section shaft, and the adjustment of the rotating amplitude of the moving plate can be realized by moving the multi-section shaft in the six holes;

[0026] The multi-section shaft is composed of four sections of threaded rods and cylinders with different diameters and is processed by turning; the upper section is a threaded rod with a diameter of 17mm, which is fixed with the lower end face of the adjusting plate by a nut; the upper middle section is a cylindrical shaft with a diameter of 30mm and a height of 20mm; the lower middle section is a cylindrical shaft with a diameter of 25mm and a length of 15mm, which is fixed with the inner ring of the bearing; the lower section is a threaded rod with a diameter of 10mm and a length of 20mm, which fixes the lower end of the bearing by a nut and a gasket;

[0027] The fixed bearing is installed on the lower middle section of the multi-section shaft, and the outer side is fixed in the fixed groove of the middle part of the frame assembly, so that the multi-section shaft and the adjusting plate above can rotate relative to the fixed bearing;

[0028] The fixed frame body is welded from a steel plate with a thickness of 5mm, two pieces of guard plates are welded on the front end of the upper end face, the guard plates are inwardly contracted, and a gap is left in the middle; a guard plate with a height of 80mm is welded on the rear end, guard plates are welded around the lower end face, a rectangular steel pipe is welded in the middle to fix the mounting plate; three circular through holes with a diameter of 8mm are opened on the end faces of the guard plates on the left and right sides of the lower end face, and six holes are arranged in two rows, which are used to fix the sliding rail on the left and right sides of the lower end face of the mounting plate by bolts; a double stand is fixed on the middle position of the tail of the lower end face by welding;

[0029] The double vertical plate is made of two steel plates with a thickness of 10 mm, and a circular through hole with a diameter of 12 mm is formed in the lower front position; the upper end face is fixed on the rear middle position of the lower end face of the fixed frame by welding, and a bearing is fixed in the lower circular through hole by bolts;

[0030] The slide rail has two, which are fixed on the guard plates on the left and right sides below the fixed frame by six bolts, and are matched with the slide on the rack assembly;

[0031] The motor is located below the fixed frame, and the output shaft is connected to the input shaft of the speed reducer;

[0032] The speed reducer is located behind the motor and is fixed on the speed reducer fixing seat on the rack assembly by four bolts; the power input shaft is connected to the power output shaft of the motor, and the power output shaft is fixed to the connector by a flat key;

[0033] The connector is welded by a flange plate and a cylinder, and four circular through holes are formed at equal intervals around the flange plate, which are fixed together by bolts and an eccentric disc; a key groove is formed in the cylinder, and the power output shaft of the speed reducer is fixed by a flat key;

[0034] The eccentric disc is made of a disc with a thickness of 20 mm and a diameter of 80 mm, and four bolt holes with a diameter of 10 mm are formed around the disc, which are fixed to the connector by bolts; four bolt holes with a diameter of 12 mm are formed in the inside, and the center distances of the bolt holes from the center of the disc are 12.5 mm, 15 mm, 17.5 mm and 20 mm respectively; the bolt holes are fixed to the double head connecting shaft by bolts, and the eccentricity of the front and rear movements of the fixed frame can be adjusted by adjusting the bolt holes in different positions;

[0035] The double head connecting shaft is welded by two cylinders with an outer diameter of 50 mm at the ends of two shafts, and the two shafts are fixed together by bolts at the front ends; bearings are installed in the interiors of the cylinders at both ends, one end is fixed to the eccentric disc by bolts, and the other end is fixed to the middle of the double vertical plate by bolts.

[0036] The rack assembly includes a rack base, an upper mounting frame body, a slide, a speed reducer fixing seat, a fixing groove and an angle adjusting plate;

[0037] The rack base is welded by four rectangular section steel pipes, which is located at the lowermost position of the whole test bench, and the lower end face is in contact with the ground;

[0038] The upper mounting frame body is welded by rectangular section steel pipes and steel plates throughout the body, the lower end corners are connected and welded to the angle adjusting plate on the rack base by bolts, and the whole body can rotate around the hinge point at the bottom of the front end; the upper end face is uniformly distributed with bolt holes, which are fixed to the four fixing blocks by bolts;

[0039] The four sliding tracks are arranged in two groups on the left and right ends of the upper part of the upper mounting frame body, and are fixed in the upper mounting frame body by six bolts respectively, and cooperate with the sliding rails to realize the forward and backward sliding of the fixing frame.

[0040] The reducer fixing seat is welded by a rectangular section steel pipe and a steel plate, and is fixed at the right lower rear end of the upper mounting frame body by welding.

[0041] The fixing groove is welded by a rectangular steel plate with a thickness of 10mm, and is fixed at the middle position of the lower end of the upper mounting frame body by welding, and forms a clamping groove in the left and right directions to limit the movement of the fixed bearing and assist the rotation of the whole rotating plate system.

[0042] The angle adjusting plate is composed of four steel plates with a thickness of 10mm, two shorter steel plates are provided with a circular through hole with a diameter of 12mm at the top, and are installed on the left and right sides of the front end of the rack base by welding, and the circular through hole is hinged to the upper mounting frame body by a bolt; two longer steel plates are arranged on the left and right sides of the rear end of the rack base by welding, and are provided with six groups of circular through holes according to the circular arc shape, and the upper mounting frame body is fixed on the rack base by a single group of through holes through a bolt, and different groups of through holes can be replaced to adjust the inclination angle of the upper mounting frame body relative to the ground, and the adjustment angle between two adjacent groups of through holes is 5°.

[0043] Compared with the prior art, the beneficial effects of the present application are:

[0044] 1. The test bench applies a reciprocating-torsional coupled external force to the surface of the kernels on the broken corn ear to realize kernel shedding, without impact and extrusion, which can greatly reduce the kernel damage in the corn threshing process and improve the threshing quality.

[0045] 2. The test bench is provided with a weight disc for loading weights at the top, the weight disc is connected with the floating plate, and the weight quality in the weight disc can change the external force applied by the circular protrusion on the floating plate to the kernel surface of the broken corn ear, so that the best threshing condition can be found.

[0046] 3. The reciprocating amplitude of the fixed plate and the rotating plate and the amplitude of the rotating plate rotating around the center on the test bench can be adjusted during the test process, so that the best threshing parameter can be found.

[0047] 4. The test bench is provided with a reset spring at the upper part, and the spring and the weight cooperate to make the floating plate move up and down, so as to meet the threshing demand of the broken corn ear with different sizes.

[0048] 5、The upper mounting frame body in the rack assembly can be adjusted in angle relative to the rack base, so as to drive the working part of the whole test table to produce a certain inclination angle relative to the ground, and facilitate to explore the influence of the inclination angle on the threshing process. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 It is a front view of the application;

[0050] Figure 2 It is a back view of the application;

[0051] Figure 3 It is an assembly view of the upper floating plate assembly of the application;

[0052] Figure 4 It is an exploded view of the upper floating plate assembly of the application;

[0053] Figure 5 It is an axonometric view of the floating plate of the application;

[0054] Figure 6 It is an axonometric view of the fixed block of the application;

[0055] Figure 7 It is an axonometric view of the lower moving plate assembly of the application;

[0056] Figure 8 It is an assembly view of the lower moving plate assembly of the application;

[0057] Figure 9 It is an exploded view of the lower moving plate assembly of the application;

[0058] Figure 10 It is an axonometric view of the power and transmission assembly of the application;

[0059] Figure 11 It is an axonometric view of the rack assembly of the application.

[0060] In the figure: A, upper floating plate assembly; B, lower moving plate assembly; C, rack assembly; 1, weight disc; 2, outer support frame; 3, spring; 4, spring stand; 5, adjusting bolt; 6, floating plate mounting frame; 7, floating plate; 8, round head protrusion; 9, fixed block; 10, fixed plate; 11, rotating plate; 12, connecting disc; 13, mounting disc; 14, rotating shaft; 15, fixed seat; 16, mounting plate; 17, shaft sleeve; 18, adjusting plate; 19, multi-section shaft; 20, fixed bearing; 21, fixed frame; 22, double stand plate; 23, slide rail; 24, motor; 25, speed reducer; 26, connector; 27, eccentric disc; 28, double-head connecting shaft; 29, rack base; 30, upper mounting frame body; 31, slide; 32, speed reducer fixed seat; 33, fixed groove; 34, angle adjusting plate. DETAILED DESCRIPTION

[0061] Referring to Figures 1-2 A broken corn cob reciprocating torsion type low-damage threshing test bench, comprising an upper floating plate assembly (A), a lower moving plate assembly (B) and a rack assembly (C);

[0062] The upper floating plate assembly (A) is located at the uppermost end of the entire broken corn cob reciprocating torsion type low-damage threshing test bench, and is fixed to the rack assembly (C) through bolts at four corners; the lower moving plate assembly (B) is located directly below the upper floating plate assembly (A), and is fixed to the rack assembly (C) through a slide rail (23), and can slide relative to the rack assembly (C) through the slide rail (23); the rack assembly (C) is the base body of the entire broken corn cob reciprocating torsion type low-damage threshing test bench, and is located at the lowermost end of the entire test bench, and is composed of a rectangular section steel pipe and a steel plate.

[0063] Referring to Figures 3-4 The upper floating plate assembly (A) comprises a weight disc (1), an outer support frame (2), four springs (3), four spring columns (4), four adjusting bolts (5), a floating plate mounting frame (6), a floating plate (7), a plurality of round head protrusions (8) and four fixing blocks (9);

[0064] The weight disc (1) is composed of a bottom plate with a length of 420 mm, a width of 480 mm and a thickness of 10 mm, and four outer support plates vertically welded on the bottom plate, wherein the four outer support plates are all 280 mm long, 50 mm high and 5 mm wide, and are vertically welded on the bottom plate with the long edges of the first and last ones downward and the long edges of the other two ones upward, so as to form a square cross-section groove; and a circular through hole is formed at each corner of the bottom plate for passing through the spring column (4); and the groove formed by the four support plates on the upper end surface is used to place the weight, so as to change the downward pressure of the entire upper floating plate assembly (A);

[0065] The outer support frame (2) is located outside the four corners of the weight disc (1), and surrounds the groove formed by the four outer support plates of the weight disc (1) in the hollow part in the middle, and is composed of a rectangular cross-section steel plate welded together, and two circular through holes are formed at each corner, four through holes are grouped, and the four inner through holes are used to place the four spring columns (4); and the four outer through holes are used to be fixed to the four fixing blocks (9) through bolts;

[0066] The four springs (3) are all installed on the upper end of the four spring columns (4), and are distributed at the four corners of the outer support frame (2) together with the four spring columns (4); the lower end surface of the spring (3) is in contact with the upper end surface of the outer support frame (2), and the upper end surface is in contact with the gasket below the nut installed at the uppermost end of the spring column (4); the adjusting nut can adjust the tightness of the spring (3), and further adjust the elastic force of the floating plate mounting frame (6) and the floating plate (7) connected to the weight disc (1) relative to the outer support frame (2) during the up-down movement;

[0067] The four spring columns (4) are arranged at the four corners of the outer support frame (2), the whole is turned by cylindrical 45 steel, the upper section is 16 mm in diameter, the middle section is 35 mm in diameter, and the lower section is 20 mm in diameter, and the upper and lower sections are threaded; the upper section passes through the weight disc (1) and the outer support frame (2), is provided with a spring (3) and a nut and a gasket for fixing the upper end surface of the spring (3); the lower section is fixed in the threaded holes at the four corners of the upper end surface of the floating plate mounting frame (6);

[0068] The four adjusting bolts (5) are arranged at the outer ends of the four spring columns (4) at the four corners of the outer support frame (2), the upper ends are fixed through two nuts arranged at the upper and lower ends of the outer support frame (2), and the lower ends are fixed through the threaded holes in the upper end surfaces of the four fixing blocks (9) and the fixing blocks (9); the elastic force of the outer support frame (2) relative to the weight disc (1) and the like can be adjusted;

[0069] The floating plate mounting frame (6) is entirely welded by a steel plate, three threaded holes are respectively formed in the front, rear, left and right of the support plate, and the floating plate (7) is fixed through the threaded holes and the bolts; one threaded hole is formed at each of the four corners of the support plate, and the four spring columns (4) are fixed;

[0070] Referring to Figure 5 The floating plate (7) is processed by a transparent plastic plate with a thickness of 20 mm, three threaded holes are formed in the four edges, and the floating plate (7) is fixed below the floating plate mounting frame (6) through the threaded holes and the bolts; a plurality of threaded holes are formed in the middle, and one round head protrusion (8) is fixed in each threaded hole; the internal condition can be observed through the floating plate (7);

[0071] The plurality of round head protrusions (8) are each composed of a threaded rod, a semicircular head welded at the tail end of the threaded rod, and a rubber sleeve wrapped on the surface of the semicircular head, and the front end of the threaded rod is fixed in the threaded hole on the floating plate (7);

[0072] Referring to Figure 6 The four fixing blocks (9) are arranged below the four corners of the outer support frame (2), the whole is welded by a rectangular steel plate, the whole is 170 mm high, 80 mm long and 50 mm wide, five surfaces are enclosed, the largest area is opened, a threaded hole with a diameter of 24 mm is formed in the upper end surface, and the threaded hole is fixed by the adjusting bolt (5); two circular through holes with a diameter of 13 mm are symmetrically formed in the left and right of the lower end surface, and the circular through holes are fixed with the upper end of the rack assembly (C) through the bolts.

[0073] Referring to Figures 7-10The lower moving plate assembly (B) comprises a fixed plate (10), a rotating plate (11), a connecting plate (12), a mounting plate (13), a rotating shaft (14), a fixed seat (15), a mounting plate (16), a shaft sleeve (17), an adjusting plate (18), a multi-section shaft (19), a fixed bearing (20), a fixed frame (21), a double vertical plate (22), a sliding rail (23), a motor (24), a speed reducer (25), a connector (26), an eccentric disc (27) and a double-end connecting shaft (28).

[0074] The fixed plate (10) is made of a rectangular steel plate with a thickness of 20 mm, a length of 650 mm and a width of 400 mm, and a circular through hole with a diameter of 340 mm is cut out in the middle of the upper and lower end faces; a through hole for placing a countersunk bolt is formed in the upper end face around the edge, and the fixed plate (10) is fixed on the fixed frame (21) through the bolt; the left and right sides are welded with a height of 80 mm; a plurality of round head protrusions (8) are installed on the upper end face at equal intervals;

[0075] The rotating plate (11) is a circular disc-shaped steel plate with a diameter of 340 mm and a thickness of 20 mm, and a plurality of round head protrusions (8) are distributed at equal intervals on the upper end face; the rotating plate (11) is embedded in the circular through hole formed in the fixed plate (10), and the two can rotate relative to each other; four through holes for placing countersunk bolts are formed at the edge of the upper end face, and the rotating plate (11) can be fixed on the connecting plate (12) through the countersunk bolts;

[0076] The connecting plate (12) is a steel plate with a diameter of 340 mm and a thickness of 8 mm, and a plurality of threaded holes are formed on the upper and lower end faces; the upper end face is fixed to the rotating plate (11) through bolts, and the lower end face is fixed to the upper end face of the mounting plate (13) through bolts;

[0077] The mounting plate (13) is a circular steel plate with a diameter of 155 mm and a thickness of 12 mm, and a plurality of bolt holes are formed on the upper and lower end faces; the upper end face is fixed to the lower end face of the connecting plate (12) through bolts, and the lower end face is fixed to the upper end face of the rotating shaft (14) through welding;

[0078] The rotating shaft (14) is composed of two sections with different diameters, the upper section has a diameter of 40 mm and a length of 65 mm, the lower section has a diameter of 30 mm and a length of 50 mm, and a key groove is formed; a threaded hole with a diameter of 10 mm is formed on the lower end face; the upper end face is fixed to the lower end face of the mounting plate (13) through welding, the lower section is fixed to the shaft sleeve (17) through a flat key, and the lower end face is fixed to the lower end face of the shaft sleeve (17) through the adjusting plate (18) and the gasket;

[0079] The fixed seat (15) is a cylinder with a height of 25 mm, an outer diameter of 120 mm, and an inner diameter of 70 mm, and four circular through holes with a diameter of 10 mm are formed on the upper and lower end faces and fixed on the upper end face of the mounting plate (16) by bolts; a bearing is installed inside, and the inside of the bearing contacts the upper segment of the rotating shaft (14);

[0080] The mounting plate (16) is processed from a steel plate with a thickness of 10 mm, a circular through hole with a diameter of 80 mm is formed in the middle, and the left and right end faces are fixed between the two steel pipes welded in the middle of the end face of the fixed frame (21) by welding;

[0081] The shaft sleeve (17) is a cylinder with a height of 40 mm, an outer diameter of 50 mm, and an inner diameter of 30 mm, a key groove is formed on the inner side, and the lower end is fixed with the rotating shaft (14) by a flat key; the lower end face is fixed on the upper end face of the adjusting plate (18) by welding;

[0082] The adjusting plate (18) is entirely processed by cutting from a steel plate with a thickness of 10 mm, the rear end is wider, and the front end is narrower; the shaft sleeve (17) is fixed on the upper end face of the rear end by welding, and six circular through holes with a diameter of 17 mm are formed at equal intervals on the front end to install the multi-segment shaft (19); moving the multi-segment shaft (19) in the six holes can realize the adjustment of the rotation amplitude of the moving plate (11);

[0083] The multi-segment shaft (19) is composed of four segments of threaded rods and cylinders with different diameters and is processed by turning; the upper segment is a threaded rod with a diameter of 17 mm, which is fixed with the lower end face of the adjusting plate (18) by a nut; the middle upper segment is a cylindrical shaft with a diameter of 30 mm and a height of 20 mm; the middle lower segment is a cylindrical shaft with a diameter of 25 mm and a length of 15 mm, which is fixed with the inner ring of the bearing; the lower segment is a threaded rod with a diameter of 10 mm and a length of 20 mm, which fixes the lower end of the bearing by a nut and a gasket;

[0084] The fixed bearing (20) is installed on the middle lower segment of the multi-segment shaft (19) and is fixed on the fixed groove (33) in the middle part of the rack assembly (C) on the outer side, so that the multi-segment shaft (19) and the adjusting plate (18) above it can rotate relative to the fixed bearing (20);

[0085] The fixed frame (21) is mainly welded from a steel plate with a thickness of 5 mm, two pieces of guard plates are welded on the upper end face of the front end, the guard plates are inwardly contracted, and a gap is left in the middle; a guard plate with a height of 80 mm is welded on the rear end, guard plates are welded on the lower end face all around, two rectangular steel pipes for fixing the mounting plate (16) are welded in the middle; two rows of three circular through holes with a diameter of 8 mm are formed on the end faces of the guard plates on the left and right sides of the lower end face, and six in total, which are used to fix the sliding rail (23) on the left and right sides of the lower end face of the mounting plate (16) by bolts; a double stand plate (22) is fixed on the lower end face tail by welding;

[0086] The double vertical plate (22) is processed from two steel plates with a thickness of 10 mm, and a circular through hole with a diameter of 12 mm is formed in the lower front position; the upper end face is fixed by welding at the middle position of the rear part of the lower end face of the fixed frame (21), and a bearing is fixed by bolts in the circular through hole of the lower part;

[0087] The slide rail (23) has two, which are fixed by six bolts on the guard plates on the left and right sides below the fixed frame (21), and are used to cooperate with the slide (31) on the rack assembly (C);

[0088] The motor (24) is located below the fixed frame (21), and the output shaft is connected to the input shaft of the speed reducer (25);

[0089] The speed reducer (25) is located behind the motor (24) and is fixed by four bolts on the speed reducer fixing seat (32) on the rack assembly (C); the power input shaft is connected to the power output shaft of the motor (24), and the power output shaft is fixed to the connector (26) by a flat key;

[0090] The connector (26) is welded from a flange and a cylinder, and four circular through holes are formed at equal intervals around the flange, which are fixed together by bolts and the eccentric disc (27); a key groove is formed in the inside of the cylinder, and the power output shaft of the speed reducer (25) is fixed by a flat key;

[0091] The eccentric disc (27) is processed from a disc with a thickness of 20 mm and a diameter of 80 mm, and four bolt holes with a diameter of 10 mm are formed around the disc, which are fixed by bolts and the connector (26); four bolt holes with a diameter of 12 mm are formed in the inside, and the distances from the center of the bolt holes to the center of the disc are 12.5 mm, 15 mm, 17.5 mm and 20 mm respectively; the bolt holes are fixed by bolts and the double-head connecting shaft (28), and the eccentricity of the forward and backward movement of the fixed frame (21) can be adjusted by adjusting the bolt holes at different positions;

[0092] The double-head connecting shaft (28) is welded at the ends of two shafts with an outer diameter of 50 mm, and the two shafts are fixed together by bolts at the front ends; bearings are installed in the interiors of the cylinders at both ends, one end is fixed by bolts on the eccentric disc (27), and the other end is fixed by bolts in the middle of the double vertical plate (22).

[0093] Referring to Figure 11 , the rack assembly (C) includes a rack base (29), an upper mounting frame body (30), a slide (31), a speed reducer fixing seat (32), a fixed groove (33) and an angle adjusting plate (34);

[0094] The rack base (29) is welded by four rectangular section steel pipes, and is located at the lowermost position of the whole test table, and the lower end surface is in contact with the ground;

[0095] The upper mounting rack body (30) is welded by rectangular section steel pipes and steel plates, the lower end four corners are hinged to the angle adjusting plates (34) on the rack base (29) through bolt connection and welding, and the whole can rotate around the hinge point at the front end bottom; the upper end surface is uniformly provided with bolt holes, and is fixed through bolt connection and four fixing blocks (9);

[0096] The slide (31) has four, two groups are arranged at the inner left and right ends of the upper mounting rack body (30) at the upper part, are fixed in the upper mounting rack body (30) through six bolts, and cooperate with the slide rail (23) to realize the forward and backward sliding of the fixing frame (21);

[0097] The speed reducer fixing seat (32) is welded by rectangular section steel pipes and steel plates, is fixed on the lower rear end right side of the upper mounting rack body (30) through welding, the lower part is a rectangular section steel pipe, and the upper part is a steel plate; the upper end surface of the steel plate is uniformly provided with four threaded holes, and the speed reducer (25) is fixed through bolts;

[0098] The fixing groove (33) is welded by a rectangular steel plate with a thickness of 10 mm, is fixed in the inner lower end middle position of the upper mounting rack body (30) through welding, forms a clamping groove in the left and right directions, and is used for limiting the movement of the fixed bearing (20) and assisting in completing the rotary movement of the whole rotating plate (11) system;

[0099] The angle adjusting plate (34) is composed of four steel plates with a thickness of 10 mm, two shorter steel plates are provided with a circular through hole with a diameter of 12 mm at the top, are installed on the left and right sides of the front end of the rack base (29) through welding, and the upper mounting rack body (30) is hinged in the circular through hole through bolts; two longer steel plates are arranged on the left and right sides of the rear end of the rack base (29) through welding, and the front hinge point to the rear fixed point is a radius with the front hinge point as a center; six groups of circular through holes are distributed on the two longer steel plates in a circular arc shape, the upper mounting rack body (30) is fixed on the rack base (29) through bolts in a single group of through holes, different groups of through holes can be replaced to adjust the inclination angle of the upper mounting rack body (30) relative to the ground, and the adjustment angle between adjacent two groups of through holes is 5°.

[0100] The working principle of the application is as follows:

[0101] Referring to Figures 1-2The working principle of the test bench for reciprocating and torsional low-damage threshing of broken corn ears is as follows: the upper floating plate assembly (A) is removed, the board surfaces of the fixed plate (10) and the rotating plate (11) are exposed, the broken corn ears formed after cracking are placed on the board surfaces of the fixed plate (10) and the rotating plate (11), the upper floating plate assembly (A) is installed back, the spring tension is adjusted by rotating the bolt, the motor (24) is started after adding appropriate weights in the weight disc (1), the fixed plate (10) and the rotating plate (11) in the test bench start to reciprocate forward and backward, the round head protrusions (8) on the upper and lower board surfaces start to exert external force on the surfaces of the corn kernels on the broken corn ears, the corn kernels are shaken reciprocally to fall off, and threshing is realized; meanwhile, for high-moisture corn kernels that are difficult to be stripped by reciprocating motion, the rotating plate (11) is subjected to the torque exerted by the shaft (14) and other components connected below the center of the rotating plate (11) during the reciprocating motion of the fixed plate (10) and the rotating plate (11) forward and backward, so that the rotating plate (11) is twisted in the positive and negative directions around the center, thereby twisting the kernels on the surface of the broken corn ears to fall off, and low-damage corn threshing is realized.

[0102] Referring to Figures 3-6 The working principle of the upper floating plate assembly (A) of the present application is as follows: the weight disc (1) and the outer support frame (2) are connected by four springs (3) and four spring columns (4), and can move relatively in the up-down direction under the action of elastic connection. The weight disc (1) and the floating plate mounting frame (6) are connected by four spring columns (4), and the weight disc (1), the floating plate mounting frame (6) and the floating plate (7) are rigidly connected and do not produce relative motion; the outer support frame (2) is rigidly connected between the four fixed blocks (9) and the rack assembly (C), and is fixed in position and cannot move relatively; during the test, the broken corn ears are placed on the lower board surface of the floating plate (7), and the round head protrusions (8) are in contact with the broken corn ears; the weight is added to the weight disc (1), the gravity is transmitted downward, the external force exerted by the round head protrusions (8) on the lower board surface of the floating plate (7) on the surface of the kernels of the broken corn ears is changed, the weight is adjusted to observe the threshing effect; during the test, the spring tension of the spring (3) can be adjusted by adjusting the bolt at the top of the spring column (4).

[0103] Referring to Figures 7-10The working principle of the lower moving plate assembly (B) of the present application is as follows. The power is transmitted from the power output shaft of the motor (24) to the power input shaft of the speed reducer (25), the power output shaft of the speed reducer (25) transmits the power output by the motor (24) to the connector (26) and the eccentric disc (27) fixed with the connector (26) after the power is reduced and the torque is increased, the eccentric disc (27) transmits the power to the double-head connecting shaft (28), drives the fixed frame (21) and various parts mounted thereon to reciprocate forward and backward in the slide (31) inside the rack assembly (C); in this process, adjusting the fixed position of the double-head connecting shaft (28) on the eccentric disc (27) can adjust the amplitude of the forward and backward swinging of the fixed frame (21); in the process of the forward and backward reciprocation of the fixed frame (21), the fixed plate (10) and the rotating plate (11) also swing forward and backward, the fixed plate (10) and the fixed frame (21) are fixed by bolt connection and do not move relatively, the rotating plate (11) is connected with the connecting disc (12), the mounting disc (13) and the rotating shaft (14) and other parts at the bottom, and can rotate relatively with respect to the fixed plate (10) and the fixed frame (21); in the process of the forward and backward reciprocation of the fixed frame (21) driving the fixed plate (10), the rotating plate (11) also reciprocates forward and backward, but at the same time, under the action of the rotating shaft (14), the adjusting plate (18) and the fixed bearing (20) and other parts, it also produces a rotary motion around the center of the rotating shaft (14), that is, the center of the rotating plate (11), realizing the twisting threshing of the corn ear; in this process, changing the position of the multi-section shaft (19) on the adjusting plate (18), that is, replacing the different hole positions, can control the rotation amplitude of the rotating plate (11).

[0104] Referring to Figure 11The rack assembly (C) of the present application works as follows. The upper end surface of the upper mounting body (30) is fixed by bolts and four fixed blocks (9) in the upper floating plate assembly (A), supporting the entire upper floating plate assembly (A); the slide (31) inside the upper end of the upper mounting body (30) cooperates with the slide rail (23) in the lower moving plate assembly (B), supporting the main body of the entire lower moving plate assembly (B); the speed reducer (25) in the lower moving plate assembly (B) is fixed on the speed reducer fixing seat (32) at the lower end of the rack assembly (C) by bolts, and the fixed bearing (20) is placed inside the fixed groove (33); the entire upper mounting body (30) is fixed on the rack base (29) through the angle adjusting plate (34), and can be rotated relative to the rack base (29) around the front end hinge position of the angle adjusting plate (34); the rear two longer adjusting plates in the angle adjusting plate (34) have six adjusting holes opened, and the adjustment angle between the two adjacent groups of through holes is 5°. Changing the position of the upper mounting body (30) fixed in the adjusting hole behind the angle adjusting plate (34) can realize the inclination of all parts of the test bed except the rack base (29) and the angle adjusting plate (34). Changing the threshing inclination during the experiment can explore the relationship between the threshing effect and the inclination angle.

Claims

1. A reciprocating torsion low-damage threshing test bench for crushed corn ears, characterized in that: It includes upper floating plate assembly (A), lower moving plate assembly (B) and frame assembly (C); The upper floating plate assembly (A) is located at the uppermost end of the entire crushed corn ear reciprocating torsion type low-damage threshing test bench, and its four corners are fixed to the frame assembly (C) by bolts; the lower moving plate assembly (B) is located directly below the upper floating plate assembly (A), and its main body is fixed to the frame assembly (C) by a slide rail (23); the frame assembly (C) is the base of the entire crushed corn ear reciprocating torsion type low-damage threshing test bench, is located at the bottom of the entire test bench, and its main body is welded by a rectangular cross-section steel pipe and a steel plate; The upper floating plate assembly (A) comprises a weight plate (1), an outer support frame (2), four springs (3), four spring columns (4), four adjusting bolts (5), a floating plate mounting frame (6), a floating plate (7), a plurality of round head protrusions (8) and four fixing blocks (9); The weight plate (1) is composed of a base plate and four outer support plates vertically welded to the base plate; The outer support frame (2) is entirely located around the outer side of the weight plate (1); The four springs (3) are respectively mounted on the upper ends of the four spring columns (4), and are placed at the four corners of the outer support frame (2) along with the four spring columns (4). The lower end surface of the spring (3) contacts the upper end surface of the outer support frame (2), and the upper end surface contacts the gasket below the nut mounted on the upper end of the spring column (4); The four adjusting bolts (5) are respectively placed at the outer ends of the four spring columns (4) at the four corners of the outer support frame (2), the upper ends are fixed by two nuts respectively placed at the upper and lower ends of the outer support frame (2), and the lower ends are fixed to the fixing blocks (9) through threaded holes on the upper end surfaces of the four fixing blocks (9); The floating plate (7) has three threaded holes on each of its four sides and is fixed to the bottom of the floating plate mounting frame (6) by bolts; a plurality of threaded holes are opened in the middle, and a round head protrusion (8) is fixed in each threaded hole; The four fixing blocks (9) are respectively placed below the four corners of the outer support frame (2) and fixed to the upper end of the frame assembly (C) by bolts; The lower moving plate assembly (B) comprises a fixed plate (10) and a rotating plate (11); The rotating plate (11) has a plurality of round-head protrusions (8) distributed evenly on its upper end surface; the rotating plate (11) is integrally embedded in a circular through hole opened inside the fixed plate (10).

2. A reciprocating torsion low-damage threshing test bench for crushed corn ears according to claim 1, characterized in that: The four supporting plates around the outer side of the weight plate (1) are all 280 mm long, 50 mm high and 5 mm wide, and are welded vertically to the bottom plate with their long sides facing downwards. A circular through hole is opened at each corner of the bottom plate. The outer support frame (2) is welded from rectangular cross-section steel plates, and surrounds the four outer support plates on the upper part of the weight plate (1) in the middle hollow part. Two circular through holes are opened at each of the four corners, and the through holes are in groups of four, four inside and four outside. The four spring columns (4) are placed at the four corners of the outer support frame (2), and are made of cylindrical 45 steel by turning. The upper section has a diameter of 16 mm, the middle diameter is 35 mm, and the lower section has a diameter of 20 mm. Both the upper and lower sections are threaded. The upper section passes through the weight plate (1) and the outer support frame (2); the lower section is fixed in the threaded holes at the four corners of the upper end surface of the floating plate mounting frame (6); The floating plate mounting frame (6) is made of welded steel plates and has three threaded holes on the front, back, left and right sides respectively. The floating plate (7) is made of a transparent plastic plate with a thickness of 20 mm; The plurality of round head protrusions (8) are composed of a threaded rod, a semicircular head welded to the end of the threaded rod, and a rubber jacket wrapped around the surface of the semicircular head. The front end of the threaded rod is fixed in a threaded hole on the floating plate (7). The fixing block (9) is welded from rectangular cross-section steel plates, with a height of 170 mm, a length of 80 mm, and a width of 50 mm. It is enclosed on five sides, with the largest side being open. A threaded hole with a diameter of 24 mm is provided on the upper end face, to which an adjusting bolt (5) is fixed; and two circular through holes with a diameter of 13 mm are provided on the lower end face in a symmetrical manner.

3. The reciprocating torsion low-damage threshing test bench for crushed corn ears according to claim 1 is characterized in that: The lower moving plate assembly (B) further includes a connecting plate (12), a mounting plate (13), a rotating shaft (14), a fixing seat (15), a mounting plate (16), a bushing (17), an adjusting plate (18), a multi-section shaft (19), a fixed bearing (20), a fixing frame (21), a double vertical plate (22), a slide rail (23), a motor (24), a speed reducer (25), a connector (26), an eccentric plate (27) and a double-headed connecting shaft (28); The fixing plate (10) is made of a rectangular steel plate with a thickness of 20 mm, a length of 650 mm, a width of 400 mm, and a circular through hole with a diameter of 340 mm is cut out in the middle of the upper and lower end surfaces; through holes for placing countersunk bolts are opened on the edges of the upper end surface, and guard plates with a height of 80 mm are welded on the left and right sides; a number of round head protrusions (8) are installed at equal intervals on the upper end surface; The rotating plate (11) is a circular steel plate with a diameter of 340 mm and a thickness of 20 mm. Four through holes for placing countersunk bolts are opened at the edge of the upper end surface. The connecting plate (12) is a steel plate with a diameter of 340 mm and a thickness of 8 mm. A plurality of threaded holes are provided on the upper and lower end surfaces. The upper end surface is fixed to the rotating plate (11) by bolts, and the lower end surface is fixed to the upper end surface of the mounting plate (13) by bolts. The mounting plate (13) is a circular steel plate with a diameter of 155 mm and a thickness of 12 mm, with a plurality of bolt holes on the upper and lower end surfaces. The upper end surface is fixed to the lower end surface of the connecting plate (12) by bolts, and the lower end surface is fixed to the upper end surface of the rotating shaft (14) by welding; The rotating shaft (14) is composed of two sections with different diameters, the upper section has a diameter of 40 mm and a length of 65 mm; the lower section has a diameter of 30 mm and a length of 50 mm, and has a keyway; a threaded hole with a diameter of 10 mm is opened on the lower end surface; the upper end surface is fixed to the lower end surface of the mounting plate (13) by welding, the lower section is fixed to the shaft sleeve (17) by a flat key connection, and the lower end surface is fixed to the adjusting plate (18) on the lower end surface of the shaft sleeve (17) by bolts and gaskets; The fixing seat (15) is a cylinder with a height of 25 mm, an outer diameter of 120 mm, and an inner diameter of 70 mm. Four circular through holes with a diameter of 10 mm are opened on the upper and lower end surfaces. It is fixed to the upper end surface of the mounting plate (16) by bolts. A bearing is installed inside the bearing, and the inside of the bearing is in contact with the upper section of the rotating shaft (14). The mounting plate (16) is made of a steel plate with a thickness of 10 mm and has a circular through hole with a diameter of 80 mm in the middle. The left and right end surfaces are fixed by welding between two steel pipes welded in the middle of the end surface of the fixing frame (21); The shaft sleeve (17) is a cylinder with a height of 40 mm, an outer diameter of 50 mm, and an inner diameter of 30 mm. A keyway is provided on the inner side surface and is fixed to the lower end of the shaft (14) by a flat key. The lower end surface is fixed to the upper end surface of the adjustment plate (18) by welding. The adjusting plate (18) is made of a steel plate with a thickness of 10 mm by cutting, with a wider rear end and a narrower front end; a shaft sleeve (17) is fixed to the upper end surface of the rear end by welding, and six circular through holes with a diameter of 17 mm are opened at equal intervals on the front end; The multi-section shaft (19) is composed of four sections of threaded rods and cylinders with different diameters, which are processed by turning; the upper section is a threaded rod with a diameter of 17 mm, which is fixed to the lower end face of the adjustment plate (18) by a nut; the middle upper section is a cylindrical shaft with a diameter of 30 mm and a height of 20 mm; the middle lower section is a cylindrical shaft with a diameter of 15 mm and a length of 25 mm, which is fixed to the inner ring of the bearing; the lower section is a threaded rod with a diameter of 10 mm and a length of 20 mm; The fixed bearing (20) is installed in the middle and lower sections of the multi-section shaft (19), and the outer side is fixed in the fixed groove (33) in the middle part of the frame assembly (C); The main body of the fixing frame (21) is welded from a steel plate with a thickness of 5 mm. Two left and right guard plates are welded on the front end of the upper end surface. The guard plates shrink inward and leave an opening in the middle. A guard plate with a height of 80 mm is welded on the rear end. Guard plates are welded on all sides of the lower end surface. Two rectangular steel pipes for fixing the mounting plate (16) are welded in the middle. The left and right guard plate end surfaces of the lower end surface are each opened with two rows of 3 in each row, a total of 6 circular through holes with a diameter of 8 mm. A double vertical plate (22) is fixed by welding to the middle position of the tail of the lower end surface. The double upright plates (22) are made of two 10 mm thick steel plates, each of which has a circular through hole with a diameter of 12 mm at the lower front position; the upper end surface is fixed to the middle position of the rear portion of the lower end surface of the fixing frame (21) by welding, and a bearing is fixed in the circular through hole at the lower portion by bolts; There are two slide rails (23), which are fixed to the left and right guard plates below the fixing frame (21) by 6 bolts respectively; The motor (24) is located below the fixed frame (21), and the output shaft is connected to the input shaft of the reducer (25); The reducer (25) is located behind the motor (24) and is fixed to the reducer fixing seat (32) on the frame assembly (C) by four bolts; the power input shaft is connected to the power output shaft of the motor (24), and the power output shaft is fixed to the connector (26) by a flat key; The connector (26) is welded by a flange and a cylinder. Four circular through holes are opened at equal intervals around the flange and fixed together with the eccentric disk (27) by bolts. A keyway is opened inside the cylinder and fixed to the power output shaft of the reducer (25) by a flat key. The eccentric disk (27) is made of a disk with a thickness of 20 mm and a diameter of 80 mm, and is fixed to the connector (26) by bolts with four bolt holes with a diameter of 10 mm opened around it; four bolt holes with a diameter of 12 mm are opened inside, and the distances between the centers of the bolt holes and the center of the disk are 12.5 mm, 15 mm, 17.5 mm and 20 mm respectively; the bolt holes are fixed to the double-headed connecting shaft (28) by bolts; The double-ended connecting shaft (28) is composed of two cylinders with an outer diameter of 50 mm welded to the ends of the two shafts, and the front ends of the two shafts are fixed together by bolts; bearings are installed inside the cylinders at both ends, one end is fixed to the eccentric disk (27) by bolts, and the other end is fixed to the middle of the double vertical plates (22) by bolts.

4. A reciprocating torsion low-damage threshing test bench for crushed corn ears according to claim 1, characterized in that: The frame assembly (C) includes a frame base (29), an upper mounting frame body (30), a slideway (31), a reducer fixing seat (32), a fixing groove (33) and an angle adjustment plate (34); The frame base (29) is welded from four rectangular cross-section steel pipes and is located at the bottom of the entire test bench, with its lower end surface in contact with the ground; The upper mounting frame body (30) is welded from a rectangular cross-section steel pipe and a steel plate, and the four corners of the lower end are hinged to an angle adjustment plate (34) welded to the frame base (29) through bolt connection; the upper end surface is evenly distributed with bolt holes, and is fixed to four fixing blocks (9) through bolt connection; There are four slideways (31), two in a group, which are placed at the left and right ends of the inner upper part of the upper mounting frame body (30) and are fixed to the inside of the upper mounting frame body (30) by six bolts respectively; The reducer fixing seat (32) is welded from a rectangular cross-section steel pipe and a steel plate, and is fixed to the right side of the lower rear end of the upper mounting frame body (30) by welding. The lower portion is a rectangular cross-section steel pipe, and the upper portion is a steel plate. Four threaded holes are evenly distributed on the upper surface of the steel plate. The fixing groove (33) is welded from a rectangular steel plate with a thickness of 10 mm and is fixed to the middle position of the lower end of the upper mounting frame body (30) by welding, forming a slot in the left-right direction; The angle adjustment plate (34) is composed of four steel plates with a thickness of 10 mm. The tops of the two shorter steel plates are provided with circular through holes with a diameter of 12 mm. The plates are mounted on the left and right sides of the front end of the frame base (29) by welding. The mounting frame body (30) is hingedly connected to the circular through holes by bolts. The two longer steel plates are respectively placed on the left and right sides of the rear end of the frame base (29) by welding. The front hinge point is the center of the circle and the distance from the front hinge point to the rear fixed point is the radius. The two longer steel plates are provided with six groups of circular through holes distributed in an arc shape.

Images