CN104206127A - Low-breakage rolling tooth type corn thresher - Google Patents

Abstract

The invention relates to a low-breakage rolling tooth type core thresher which comprises a rack, a threshing bin, a feeding hopper and a corncob outlet hopper. A threshing spindle and a threshing roller arranged on the threshing spindle are arranged in the threshing bin; one end, which corresponds to the feeding hopper, of the threshing spindle is provided with a plate tooth; the plate tooth consists of two helical blades which are helically distributed in a crossed manner along the axial outer surface of the threshing spindle; the outer periphery of the threshing roller is provided with rolling teeth which are helically distributed; each rolling tooth is of an integrated structure formed by connecting a landing with an arc tooth; an included angle between a tangent line of a sunken arc surface of each arc tooth and a connecting part of the corresponding landing and the plane where the inner side edge of the landing is positioned is 150 to 160 degrees; an included angle between each landing and the corresponding arc tooth is towards the rotating direction of the threshing roller. In the threshing process, the rolling teeth on the threshing roller can take a separating effect on grains and corncobs; moreover, under a specific rotating speed of the threshing roller, the rolling teeth cannot generate a breakage effect on the grains, so that the breakage rate of the core grains is reduced.

Description

A low-damage hobbing corn thresher

technical field

The invention relates to a corn thresher, in particular to a low-damage hobbing corn thresher.

Background technique

With the continuous development of social economy, the existing common agricultural machinery and tools are also developing towards mechanization and automation. With the continuous increase of people's corn production, corn threshing has become a problem before people. Manual threshing is too slow and time-consuming. The emergence of the corn thresher solves the above problems, reduces the labor intensity, and the most important thing is to greatly increase the work efficiency. The existing corn threshing work is generally aimed at sun-dried corn ears, whose water content is as high as 18%. The high moisture content and the high connection strength between the grain and the mandrel lead to a decrease in the threshing quality and an increase in the threshing loss rate. Considering the actual situation, it is difficult to establish a special drying room to reduce the moisture content of corn ears, thereby reducing the rate of grain damage during threshing. Therefore, the researchers set their goals on improving the structure of the corn thresher in order to obtain a thresher with a lower corn kernel damage rate.

Contents of the invention

The purpose of the present invention is to provide a low-damage hobbing corn thresher, which can still obtain corn kernels with a low breakage rate when the water content of corn ears is high.

The technical scheme adopted by the present invention to achieve the above object is: a low-damage hobbing corn thresher, including a frame, a threshing bin fixed on the frame, a feeding hopper on the upper part of the input end of the threshing bin and a The core bucket at the end of the output end of the threshing bin. The threshing bin is equipped with a threshing main shaft and a threshing drum installed on the threshing main shaft. The output shaft of the motor is connected with the pulley provided at one end of the threshing main shaft through a belt. The threshing main shaft corresponds to One end of the feeding hopper is provided with a plate tooth for pushing the fed corn ears to the outer peripheral surface of the threshing drum. The plate tooth is composed of two helical blades arranged in a spiral cross direction along the axial outer surface of the threshing main shaft. The two helical blades are wound around it. The center of the intersection point is arranged symmetrically; the outer peripheral surface of the threshing drum is provided with multiple rows of hobbing teeth for threshing evenly spaced along its axial direction, and each row of hobbing teeth is arranged in a staggered manner so that it is spirally distributed along the outer peripheral surface of the threshing drum. The gear hobbing described above is an integrated structure formed by the connection of steps and arc-shaped teeth. The opposite sides of the arc-shaped teeth are respectively an inner concave arc surface and an outer convex arc surface, and the inner concave arc surface of the arc-shaped teeth The included angle between the tangent of the connecting part of the ladder and the plane where the inner edge of the ladder is located is 150~160°, and the angle formed between the ladder and the arc-shaped teeth faces the rotation direction of the threshing drum.

The frame is provided with a grain harvesting device located below the threshing bin and connected to its inner cavity, the core outlet is provided with a vibrating screen corresponding to the output end of the threshing drum, and a vibrating screen is provided below the vibrating screen. Enter the grain sliding plate inside the grain collecting device.

Further, an annular concave plate is arranged between the threshing bin and the threshing drum, and the height of each hob in each row of hobs is the same, and the height of the hobbing can make it possible to squeeze the ear of corn between the hobs and the inner wall of the annular concave plate. The grains are threshed from time to time, and the annular concave plate is evenly provided with honeycomb holes for the grains to fall into the grain harvesting device.

Further, the connecting part between the threshing bin and the grain harvesting device is provided with an exhaust fan, which is used to extract and discharge sundries such as corn silk mixed in the removed grains.

The upper part of both ends of the threshing bin is provided with a semicircular baffle. Cause the staff not to twist their hands or clothes into the threshing machine, causing accidents such as casualties; second, to prevent the threshing of the corn kernels from splashing, because after the corn ears are threshed, the high-speed rotating threshing drum makes the hobbing teeth take off The corn kernels splash around, and the setting of the baffle can prevent the threshed corn kernels from being collected into the grain collecting device.

Beneficial effects: 1. The gear hobbing is composed of the connection between the ladder and the arc-shaped teeth. The angle between the ladder and the arc-shaped teeth is set so that the entire hobbing is simulated according to the structure of the chicken pecking, so that the hobbing is in the opposite direction. When threshing corn ears, it can separate the corn kernels and corncobs, and at the specific speed of the threshing drum, the hobbing teeth will not damage the corn kernels, and can perform corn threshing more effectively and reduce corn kernel damage Rate.

2. The plate teeth on the threshing main shaft at the input end of the threshing drum can speed up the feeding speed of corn ears, and the corn ears that are convenient to be fed can contact the threshing drum faster, which improves the threshing efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the present invention;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the schematic diagram of plate teeth and threshing cylinder;

Fig. 4 is the right view of Fig. 3;

Fig. 5 is the structural diagram of gear hobbing in the present invention;

Fig. 6 is a positional diagram of the annular concave plate and the threshing cylinder.

Reference signs: 1, frame, 2, threshing bin, 3, feeding hopper, 4, core hopper, 5, threshing main shaft, 6, threshing drum, 7, pulley, 8, spiral blade, 9, hobbing, 90 , terrace, 91, arc-shaped teeth, 10, grain collection device, 11, vibrating screen, 12, grain slide plate, 13, annular concave plate, 14, honeycomb hole, 15, exhaust fan, 16, baffle plate.

Detailed ways

A low-damage hobbing corn thresher, as shown in Figure 1 and Figure 2, includes a frame 1, a threshing bin 2 fixed on the frame 1, a feeding hopper 3 located on the upper part of the threshing bin 2 and the input end, and The core hopper 4 located at the output end of the threshing bin 2 is also provided on the frame 1 with a grain collection device 10 located below the threshing bin 2 and connected to its inner cavity. The vibrating screen 11 corresponding to the output end is provided with a grain slide plate 12 extending into the inside of the grain collection device 10 under the vibrating screen 11, and an exhaust fan 15 is provided at the connection part between the threshing bin 2 and the grain collection device 10, and the threshing bin 2 has two The upper part of the end is provided with a semicircular baffle 16.

The threshing bin 2 is provided with a threshing main shaft 5 and a threshing drum 6 installed on the threshing main shaft 5. The output shaft of the motor is connected with the pulley 7 provided at one end of the threshing main shaft 5 through a belt. It is used to push the fed corn ear to the plate teeth on the outer peripheral surface of the threshing cylinder 6 . As shown in FIG. 3 , the plate tooth is composed of two helical blades 8 crossed on the outer peripheral surface of the threshing main shaft 5 , and the two helical blades 8 are arranged symmetrically around the center of their intersection. The outer peripheral surface of the threshing drum 6 is provided with multiple rows of hobbing teeth 9 for threshing evenly spaced along its axial direction. Four rows of hobbing teeth 9 are evenly distributed on the outer peripheral surface of the threshing cylinder 6 . The gear hobbing 9 shown in Figure 5 is an integral structure formed by connecting a step platform 90 and an arc-shaped tooth 91, and the opposite sides of the arc-shaped tooth 91 are respectively an inner concave arc surface and an outer convex arc surface, The angle between the tangent line between the concave arc surface of the arc-shaped tooth 91 and the connecting part of the step platform 90 and the plane where the inner side of the step platform 90 is located is 150-160°, and the formed between the step platform 90 and the arc-shaped tooth 91 The included angle is towards the rotation direction of the threshing cylinder 6 . In the longitudinal section of the hob 9, the hob 9 is formed by connecting the inner concave line, the inner line, the bottom line, the outer line and the outer convex line, that is, the angle between the tangent of the inner concave line and the inner line and the inner line is 150~160°.

In the present invention, an annular concave plate 13 as shown in Figure 6 is provided between the threshing bin 2 and the threshing cylinder 6, and the height of each hob in each row of hobs is the same, and the height of the hobs makes it possible to squeeze the ear of corn The grains are threshed between the hobbing teeth and the inner wall of the annular concave plate 13, and the annular concave plate 13 is uniformly provided with honeycomb holes 14 for dropping the grains into the grain harvesting device 10.

Compared with the prior art, the hobbing 9 in the present invention is an integrated structure formed by connecting the steps 90 and the arc-shaped teeth 91. The hobbing is simulated by the structure of a chicken beak, and the hobbing of this structure is The threshing work of the corn ear is imitated by the action force of the chicken pecking the grain on the corn ear, which can play a discrete role in the movement of the corn without causing damage to the corn grain. Plate teeth are designed at the lower end of the feeding hopper 3, which is beneficial for corn ears to enter between the threshing drum 6 and the annular concave plate 13, ensuring that the central axis of the corn ears is parallel to the threshing main shaft 5 as far as possible, and speeding up the feeding of corn ears . Further, the lower end of the feeding hopper 3 can be arranged tangentially to the threshing bin 2, so that the ears of corn fed into the feeding hopper 3 can smoothly enter the threshing bin 2 without being stuck at the feeding port, reducing the breakage of the corn cob Rate.

The working principle of the corn thresher is as follows: when working, the corn ear is fed by the feeding hopper 3, and under the action of the plate teeth, the corn ear is spirally pushed to reach between the threshing drum 6 and the arc-shaped concave plate 13, through the hob 9 and The action between the ears of corn starts to threshing, and it is hit outside the high-speed rotating threshing drum 6, and the grains that fly to the vibrating screen 11 are separated by the sieve holes, and are normally threshed from the honeycomb holes 14 on the arc-shaped concave plate 13. The grains converge, and then arrive in the grain harvesting device 10 through the grain slide plate 12, the corncobs are discharged from the core hopper 4 at the output end of the threshing bin 2, and the corn silk and skins are discharged from the tuyere by the exhaust fan 15. The baffle plate 16 that the threshing cylinder 6 two ends is provided with prevents the corn kernels that come off from splashing and hurting people. This corn thresher adopts electric drive, and the motor transmits power through the pulley. The exhaust fan 15 is installed on the bottom of the corn thresher, and is fixedly connected with the lower machine beam of the frame 1 of the thresher, which can save the occupied space of the fan. space. The hobbing teeth 9 are welded on the outer peripheral surface of the threshing cylinder 6, so that the structure is more firm, stable and reliable.

Claims (5)

1. A low-damage hobbing corn thresher, including a frame (1), a threshing bin (2) fixed on the frame (1), and a feeding hopper (3) on the upper part of the input end of the threshing bin (2) ) and the core bucket (4) located at the output end of the threshing bin (2), the threshing bin (2) is equipped with a threshing main shaft (5) and a threshing drum ( 6), the output shaft of the motor is connected to the pulley (7) provided at one end of the threshing main shaft (5) through a belt, and the characteristic is that: the end of the threshing main shaft (5) corresponding to the feeding hopper (3) is provided with a The fruit ears are pushed to the plate teeth on the outer peripheral surface of the threshing cylinder (6). The plate teeth are composed of two helical blades (8) that are arranged in a spiral cross direction along the axial outer surface of the threshing main shaft (5). The center of the intersection point is arranged symmetrically; the outer peripheral surface of the threshing cylinder (6) is evenly spaced along its axial direction with multiple rows of hobbing teeth (9) for threshing. ) in a spiral distribution, the hobbing (9) is an integrated structure formed by connecting the steps (90) and arc-shaped teeth (91), and the opposite sides of the arc-shaped teeth (91) They are the inner concave arc surface and the outer convex arc surface respectively, and the included angle between the tangent line between the inner concave arc surface of the arc-shaped tooth (91) and the connecting part of the platform (90) and the plane where the inner edge of the platform (90) is located is 150~160°, the angle formed between the step platform (90) and the arc-shaped teeth (91) faces the rotation direction of the threshing drum (6). 2. A low-damage hobbing corn thresher according to claim 1, characterized in that: the frame (1) is provided with a grain harvester located below the threshing bin (2) and connected to its inner cavity device (10), the core hopper (4) is provided with a vibrating screen (11) corresponding to the output end of the threshing drum (6), and the vibrating screen (11) is provided with a grain harvesting device (10) Internal grain slide (12). 3. A low-damage hobbing corn thresher according to claim 2, characterized in that: an annular concave plate (13) is provided between the threshing bin (2) and the threshing drum (6), and each The height of each hob in the row of hobs is the same, and the height of the hob is set so that the ear of corn can be squeezed between the hob and the inner wall of the annular concave plate (13) to be threshed. The annular concave plate (13) is evenly set There are honeycomb holes (14) for dropping the grains into the grain harvesting device (10). 4. A low-damage hobbing corn thresher according to claim 2, characterized in that: an exhaust fan (15) is provided at the connecting part of the threshing bin (2) and the grain harvesting device (10). 5. A low-damage hobbing corn thresher according to claim 1 or 2, characterized in that: the upper parts of both ends of the threshing bin (2) are provided with semicircular baffles (16).