CN113228945A

CN113228945A - Quantitative mechanism of corn threshing device

Info

Publication number: CN113228945A
Application number: CN202110531092.6A
Authority: CN
Inventors: 张双
Original assignee: Zhengzhou Sigluoding Electronic Technology Co ltd
Current assignee: Zhengzhou Sigluoding Electronic Technology Co ltd
Priority date: 2021-05-16
Filing date: 2021-05-16
Publication date: 2021-08-10

Abstract

The invention relates to the technical field of agricultural production, in particular to a corn threshing device which comprises a threshing device main body, a first rotating roller, a second rotating roller and a collecting frame, wherein the first rotating roller is installed inside the top end of the threshing device main body, the second rotating roller is installed on the top end of the threshing device main body through a bearing, and a driving mechanism is arranged on the surface of the second rotating roller. According to the corn ear cleaning device, the scraping rod and the filter plate are arranged, dropped corn kernels can be screened and collected through the filter plate, large-particle impurities or broken corn ears can be separated from the corn kernels, the problem that a large amount of impurities are mixed after the corn kernels are removed and are difficult to clean can be avoided, the scraping rod is arranged on the surface of the filter plate, the impurity corn kernels on the surface of the filter plate can be scraped, the corn kernels are prevented from being accumulated on the surface of the filter plate, the corn kernels are not separated clearly due to blockage, the filtering efficiency of the corn kernels is influenced, the excessive corn kernels at a dust exhaust port can be caused, the quantitative mechanism is arranged, the instant feeding amount of the corn ears can be adjusted, and the blockage of a feeding port is avoided.

Description

Quantitative mechanism of corn threshing device

Technical Field

The invention relates to the technical field of agricultural production, in particular to a quantifying mechanism of a corn threshing device.

Background

Compared with traditional grain crops such as rice, wheat and the like, the corn has strong drought resistance, cold resistance, barren resistance and excellent environmental adaptability, the corn has high nutritional value and is an excellent grain crop, corn kernels need to be stripped in the processing process of the corn, a corn thresher is generally used for threshing, the corn thresher is a mechanical device for threshing corn ears, and mainly used for threshing the dried corn ears.

Present corn thresher is when using, inside need drop into thresher with a large amount of corn ears, but the corn ears is in the twinkling of an eye the feeding volume when great, can cause the pan feeding mouth to take place to block up, and thresher threshes unclean and the kernel of corn to the corn ears can produce a large amount of breakage, lead to a large amount of kernels to cause the waste, the back is threshed to the corn simultaneously, can impurity a large amount of or broken corn ears in the kernel of corn, thereby can lead to threshing mechanism inside sifter to take place to block up, cause the kernel of corn to pile up on the sifter surface, make the kernel of corn separate unclear, and the dust exhaust mouth also can discharge a large amount of kernels, consequently, need a corn thresher to solve above-mentioned problem.

Disclosure of Invention

The invention aims to solve the problems that in the prior art, when the instantaneous feeding amount of corn ears is large, a feeding port is blocked, threshing of the corn ears is not clean, corn kernels are crushed in a large amount, impurities in the corn kernels are large or the corn ears are crushed, a screen surface in the threshing device is blocked, the corn kernels are not separated clearly, and a dust exhaust port can exhaust a large amount of corn kernels.

In order to achieve the purpose, the invention adopts the following technical scheme:

a corn threshing device comprises a threshing device main body, a first rotating roller, a second rotating roller and a collecting frame, wherein the first rotating roller is arranged inside the top end of the threshing device main body, the second rotating roller is arranged on the top end of the threshing device main body through a bearing, a driving mechanism is arranged on the surface of the second rotating roller, a cleaning mechanism is arranged on the surface of the driving mechanism, the cleaning mechanism comprises a fixed disc, a fixed disc is sleeved on the surface of the driving mechanism, a first spring is welded on the surface of the fixed disc, a sliding block is welded at one end, away from the fixed disc, of the first spring, a scraping rod is fixedly connected to the surface of the sliding block, the surface of the scraping rod is abutted to the surface of a filter plate, baffles are fixedly connected to two sides of the surface of the filter plate, a second connecting rod is inserted into the baffles, and a cleaning plate is fixedly connected to the surface of the second connecting rod, the utility model discloses a threshing device, including cleaning plate, feed inlet, feed outlet, feed inlet, feed outlet, and the surface of feed outlet is inserted and is equipped with the guide post, and the surface cover of guide post is equipped with the second spring, the bottom of feed outlet is inserted and is equipped with the push outlet.

Preferably, the actuating mechanism includes first belt pulley, the surface of second commentaries on classics roller has the reciprocating lever through first belt pulley connection, and the reciprocating lever one end of keeping away from the thresher main part is connected with the motor, the surperficial block of reciprocating lever has the crescent moon board, and the fixed bull stick of one side fixedly connected with of reciprocating lever is kept away from to the crescent moon board, the fixed surperficial fixedly connected with screens piece of fixed bull stick, and the screens piece inserts and establish the inside at the removal seat, the fixed surface of removal seat is connected with the head rod, and the head rod keeps away from the one end fixedly connected with fixed block of removal seat.

Preferably, the reciprocating rod is cylindrical, a thread groove is formed in the surface of the reciprocating rod, the crescent plate is arc-shaped, and the size of the inner wall of the thread groove formed in the surface of the reciprocating rod is matched with the size of the surface of the crescent plate.

Preferably, the fixed rotating rod is cylindrical, four clamping blocks are arranged on the surface of the fixed rotating rod at equal intervals, the four clamping blocks are arc-shaped, a circular through hole is formed in the movable seat, a circular groove is formed in the inner wall of the through hole, the surface size of the fixed rotating rod is matched with the size of the inner wall of the circular through hole formed in the movable seat, and the surface size of the four clamping blocks is matched with the size of the inner wall of the circular groove.

Preferably, the second connecting rod is provided with two sets of in the inside symmetry of filter, and two sets of second connecting rods all set up to L shape, the spout has been seted up to the inside both sides of filter, the spout has been seted up to the inside of baffle, and is two sets of the surface size of second connecting rod and the inside spout inner wall size looks adaptation of seting up of filter and baffle.

Preferably, the dosing mechanism includes the second belt pulley, the surface that the roller was changeed to the second has first pivot through second belt pulley connection, and first pivot passes through the bearing and installs the inside at the protective frame, the spacing ring has been cup jointed on the surface of first pivot, and the fixed surface of spacing ring is connected with the loop bar, the inner wall welding of loop bar has the third spring, and the one end welding that the loop bar inner wall was kept away from to the third spring has the telescopic link, the one end fixedly connected with drive block of third spring is kept away from to the telescopic link, the surface of spacing ring is inconsistent with the surface of carousel.

Preferably, the limiting ring is set to be semicircular, the turntable is set to be rectangular, the surfaces of the periphery of the turntable are provided with cambered surfaces, and the surface radian of the limiting ring is the same as that of the cambered surfaces of the periphery of the turntable.

Preferably, the first toggle block is set to be rectangular, the surfaces of the two sides of the first toggle block are provided with inclined planes, the second toggle block is set to be rectangular, the surfaces of the two sides of the second toggle block are provided with inclined planes, and the inclined plane angles of the surfaces of the two sides of the first toggle block are the same as the inclined plane angles of the surfaces of the two sides of the second toggle block.

Preferably, the quantifying cylinder is cylindrical, and four groups of grooves are formed in the quantifying cylinder at equal intervals.

Preferably, the guide plates are symmetrically provided with two groups in the feeding port, and the surfaces of the two groups of guide plates are provided with inclined planes.

Compared with the prior art, the invention has the beneficial effects that:

1. the device is provided with the scraping rod and the filter plate, dropped corn kernels can be screened and collected through the filter plate, large-particle impurities or broken corn ears and the corn kernels can be separated, the situation that a large amount of impurities are mixed and difficult to clean after the corn kernels are removed can be avoided, the scraping rod is arranged on the surface of the filter plate, the impurity corn kernels on the surface of the filter plate can be scraped, the phenomenon that the corn kernels are accumulated on the surface of the filter plate to cause blockage, the corn kernels are not separated clearly, the filtering efficiency of the corn kernels is influenced, and therefore the excessive corn kernels at a dust exhaust port can be caused;

2. the device is through being provided with a quantitative section of thick bamboo and deflector, deflector through the inside setting of pan feeding mouth, can drop into the inside of pan feeding mouth at the maize, play the effect of correcting the maize position, thereby can avoid the maize to take place to block up, avoid the pan feeding mouth to return corncob phenomenon, lead to threshing of maize inefficiency, and rotation through a quantitative section of thick bamboo, can carry out the ration with the inside maize of pan feeding mouth and carry to inside the thresher main part, thereby can reduce the feeding volume in the twinkling of an eye of maize, avoid maize feeding volume great can lead to the maize to thresh unclean and the broken too much phenomenon of kernel of corn, thereby can reduce the waste of kernel of corn.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art will be able to derive other drawings without creative efforts.

FIG. 1 is a schematic sectional view of the structure of the present invention.

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

Fig. 3 is a schematic perspective view of the driving mechanism and the cleaning mechanism of the present invention.

Fig. 4 is a schematic perspective cross-sectional view of the driving mechanism of the present invention.

Fig. 5 is a three-dimensional burst diagram of the driving mechanism structure of the present invention.

Fig. 6 is a schematic perspective view of the structure of the dosing mechanism and the limiting mechanism of the present invention.

Fig. 7 is a schematic perspective sectional view of the structure of the dosing mechanism and the limiting mechanism of the present invention.

Fig. 8 is a perspective view of the quantitative mechanism of the present invention.

Fig. 9 is a schematic perspective sectional view of the structure of the dosing mechanism of the present invention.

In the figure: 1. a threshing device main body; 2. a first rotating roller; 3. a second rotating roller; 4. a drive mechanism; 41. a first pulley; 42. a reciprocating lever; 43. a motor; 44. a crescent plate; 45. fixing the rotating rod; 46. a bit block; 47. a movable seat; 48. a first connecting rod; 49. a fixed block; 5. a cleaning mechanism; 51. fixing the disc; 52. a first spring; 53. a slider; 54. a scraping rod; 55. a second connecting rod; 56. cleaning the plate; 57. a guide post; 58. a second spring; 59. a filter plate; 510. a baffle plate; 6. a collection frame; 7. a dosing mechanism; 71. a second pulley; 72. a first rotating shaft; 73. a protective frame; 74. a limiting ring; 75. a loop bar; 76. a third spring; 77. a telescopic rod; 78. driving the block; 79. a turntable; 8. a limiting mechanism; 81. a second rotating shaft; 82. a first toggle block; 83. a dosing cylinder; 84. a feeding port; 85. a push rod; 86. a second toggle block; 87. a guide plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: a corn threshing device comprises a threshing device body 1, a first rotating roller 2, a second rotating roller 3 and a collecting frame 6, wherein the first rotating roller 2 is installed inside the top end of the threshing device body 1, the second rotating roller 3 is installed on the top end of the threshing device body 1 through a bearing, a driving mechanism 4 is arranged on the surface of the second rotating roller 3, a cleaning mechanism 5 is arranged on the surface of the driving mechanism 4, the cleaning mechanism 5 comprises a fixed disc 51, a fixed disc 51 is sleeved on the surface of the driving mechanism 4, a first spring 52 is welded on the surface of the fixed disc 51, a sliding block 53 is welded at one end, far away from the fixed disc 51, of the first spring 52, a scraping rod 54 is fixedly connected with the surface of the sliding block 53, the surface of the scraping rod 54 is abutted against the surface of a filter plate 59, baffle plates 510 are fixedly connected with two sides of the surface of the filter plate 59, a second connecting rod 55 is inserted into the baffle plate 510, and a cleaning plate 56 is fixedly connected with the surface of the second connecting rod 55, a guide post 57 is inserted into the cleaning plate 56, a second spring 58 is sleeved on the surface of the guide post 57, a collecting frame 6 is inserted into the bottom end of the threshing device main body 1, a quantifying mechanism 7 is arranged on the side surface of the threshing device main body 1, a limiting mechanism 8 is arranged inside the quantifying mechanism 7, the limiting mechanism 8 comprises a second rotating shaft 81, a second rotating shaft 81 is arranged inside the quantifying mechanism 7 through a bearing, a first poking block 82 is sleeved on the surface of the second rotating shaft 81, a quantifying barrel 83 is sleeved at the central position of the second rotating shaft 81, the surface of the quantifying barrel 83 is abutted against the inner wall of the feeding port 84, a push rod 85 is inserted into the feeding port 84, a second poking block 86 is sleeved on the surface of one end, far away from the feeding port 84, of the push rod 85, a guide plate 87 is fixedly connected to one end, inserted into the feeding port 84, a circular through hole is formed in the cleaning plate 56, can make clearance board 56 slide on the surface of guide post 57 to can play the convenience and collect the kernel of corn, and set up to the U-shaped through catch bar 85, can make two sets of deflectors 87 in the inside synchronous motion of thresher main part 1.

Further, the driving mechanism 4 includes a first belt pulley 41, the surface of the second rotating roller 3 is connected with a reciprocating rod 42 through the first belt pulley 41, and one end of the reciprocating rod 42 away from the threshing device main body 1 is connected with a motor 43, the surface of the reciprocating rod 42 is clamped with a crescent-shaped plate 44, and the crescent-shaped plate 44 is away from one side of the reciprocating rod 42 and fixedly connected with a fixed rotating rod 45, the surface of the fixed rotating rod 45 is fixedly connected with a clamping block 46, and the clamping block 46 is inserted in the moving seat 47, the surface of the moving seat 47 is fixedly connected with a first connecting rod 48, and the first connecting rod 48 is far away from one end of the moving seat 47 and fixedly connected with a fixed block 49, the first connecting rod 48 is set to be L-shaped, and when the moving seat 47 moves, the scraping rod 54 is driven to clean the surface of the filter plate 59.

Further, reciprocating lever 42 sets up to be cylindrical, and reciprocating lever 42's surface has seted up the thread groove, crescent plate 44 sets up to the arc, the thread groove inner wall size of the seting up on reciprocating lever 42 surface and the surface size looks adaptation of crescent plate 44, the thread groove of seting up through reciprocating lever 42 surface, can make crescent plate 44 remove in the thread groove when reciprocating lever 42 rotates, thereby can effectually conveniently remove the whole surface reciprocating motion at reciprocating lever 42 of seat 47, be convenient for clear up the collection to the kernel of corn after peeling off.

Further, the fixed rotating rod 45 is set to be cylindrical, four sets of clamping blocks 46 are equidistantly arranged on the surface of the fixed rotating rod 45, the four sets of clamping blocks 46 are all set to be arc-shaped, a circular through hole is formed in the movable seat 47, a circular groove is formed in the inner wall of the through hole, the surface size of the fixed rotating rod 45 is matched with the inner wall size of the circular through hole formed in the movable seat 47, the surface size of the four sets of clamping blocks 46 is matched with the inner wall size of the circular groove, the fixed rotating rod 45 can be inserted into the circular through hole through the circular through hole formed in the movable seat 47, when the reciprocating rod 42 rotates, the crescent plate 44 can drive the fixed rotating rod 45 to rotate in the movable seat 47, and the fixed rotating rod 45 can be limited when rotating through the four sets of clamping blocks 46.

Further, second connecting rod 55 is provided with two sets ofly at the inside symmetry of filter 59, and two sets of second connecting rod 55 all set up to L shape, the inside spout of having seted up in both sides of filter 59, the spout has been seted up to the inside of baffle 510, the surface dimension size of two sets of second connecting rod 55 and the inside spout inner wall size looks adaptation of seting up of filter 59 and baffle 510, set up to L shape through two sets of second connecting rod 55, can be when fixed block 49 removes, make two sets of second connecting rod 55 drive clearance board 56 and remove, and through the inside spout of seting up of filter 59 and baffle 510, can be when second connecting rod 55 removes, carry on it spacingly.

Further, the quantitative mechanism 7 includes a second belt pulley 71, the surface of the second rotary roller 3 is connected with a first rotary shaft 72 through the second belt pulley 71, the first rotary shaft 72 is installed inside the protection frame 73 through a bearing, the surface of the first rotary shaft 72 is sleeved with a limit ring 74, the surface of the limit ring 74 is fixedly connected with a loop bar 75, the inner wall of the loop bar 75 is welded with a third spring 76, one end of the third spring 76 far away from the inner wall of the loop bar 75 is welded with a telescopic rod 77, one end of the telescopic rod 77 far away from the third spring 76 is fixedly connected with a driving block 78, the surface of the limit ring 74 is abutted against the surface of the rotary table 79, the surface of one end of the telescopic rod 77 inserted inside the loop bar 75 is provided with a circular disc, when the telescopic rod 77 moves inside the loop bar 75, the telescopic rod is limited through the circular disc, through grooves are formed at four corners of the rotary table 79, through grooves formed at four corners of the rotary table 79, when the limiting ring 74 rotates, the driving block 78 is engaged with the inside of the through groove, so as to drive the turntable 79 to rotate.

Further, the spacing ring 74 sets up to semi-circular, and carousel 79 sets up to the rectangle, and carousel 79 all is provided with the cambered surface on the surface all around, and the surface radian of spacing ring 74 is the same with the cambered surface radian that carousel 79 surface all around set up, through the cambered surface that carousel 79 surface sets up all around, can make the surface and the cambered surface of spacing ring 74 inconsistent to can keep away from carousel 79's surface with the movable block 78 when, carry on spacingly with carousel 79, play the ration whereabouts that makes things convenient for the maize.

Furthermore, the first toggle block 82 is set to be rectangular, the two side surfaces of the first toggle block 82 are provided with inclined surfaces, the second toggle block 86 is set to be rectangular, the two side surfaces of the second toggle block 86 are provided with inclined surfaces, the angle of the inclined surfaces arranged on the two side surfaces of the first toggle block 82 is the same as that of the inclined surfaces arranged on the two side surfaces of the second toggle block 86, when the inclined surfaces arranged on the two side surfaces of the first toggle block 82 are abutted to the inclined surfaces arranged on the two side surfaces of the second toggle block 86, the push rod 85 can drive the two groups of guide plates 87 to move in the feeding port 84, so that the corn can be prevented from causing internal blockage of the feeding port 84, meanwhile, the friction force can be reduced through the abutment of the inclined surfaces to the inclined surfaces, and the service lives of the first toggle block 82 and the second toggle block 86 are prolonged;

furthermore, the quantifying cylinder 83 is cylindrical, four groups of grooves are formed in the quantifying cylinder 83 at equal intervals, the corn in the feeding port 84 can fall into the quantifying cylinder 83 through the four groups of grooves formed in the quantifying cylinder 83 at equal intervals, and the corn in the grooves can be transferred into the threshing device main body 1 through the rotation of the quantifying cylinder 83;

further, the deflector 87 is provided with two sets of in pan feeding mouth 84's inside symmetry, and the surface of two sets of deflectors 87 all is provided with the inclined plane, and through the inclined plane that two sets of deflectors 87 surfaces all set up, can arrange the inside maize of pan feeding mouth 84 in order, prevents that the maize from piling up, causes pan feeding mouth 84's inside jam.

The working principle is as follows: when the corn threshing device is used, according to the attached drawings of 1, 6, 7, 8 and 9, the corn is thrown into the feed inlet 84, the corn can be guided by the two groups of guide plates 87, the position of the corn can be arranged, the second rotating roller 3 can drive the first rotating shaft 72 to rotate through the second belt pulley 71, the limit ring 74 and the loop bar 75 can rotate simultaneously through the rotation of the first rotating shaft 72, the telescopic rod 77 can drive the driving block 78 to rotate when the loop bar 75 rotates, the driving block 78 is clamped in the rotating disc 79, the rotating disc 79 can rotate, the second rotating shaft 81 can drive the first poking block 82 and the quantifying cylinder 83 to rotate when the rotating disc 79 rotates, the corn in the quantifying cylinder 83 can be transferred to the inside of the threshing device main body 1 when the quantifying cylinder 83 rotates, when the first toggle block 82 rotates, the first toggle block 82 can be abutted against the surface of the second toggle block 86, and at this time, the push rod 85 can drive the guide plate 87 to move in the feeding port 84, so that the corns can be prevented from being blocked in the feeding port 84;

when the corn falls into the threshing device main body 1, according to the attached

drawings

1, 2 and 3, the motor 43 can drive the reciprocating rod 42 to rotate, when the reciprocating rod 42 rotates, the first rotating roller 2 and the second rotating roller 3 can rotate through the first belt pulley 41, so that the corn can be threshed, the corn grains can fall on the surface of the filter plate 59, and the corn grains can be separated from large-particle impurities through the filter plate 59.

After the corn grains are filtered, according to the attached fig. 1, the attached fig. 2, the attached fig. 3, the attached fig. 4 and the attached fig. 5, the crescent plate 44 can move in the thread groove formed on the surface thereof by the rotation of the reciprocating rod 42, when the crescent plate 44 moves, the fixed rotating rod 45 can drive the moving seat 47 to move integrally, so that the first connecting rod 48 can drive the fixed block 49 to move, when the first connecting rod 48 moves, the sliding block 53 can drive the scraping rod 54 to move on the surface of the filtering plate 59, thereby cleaning the large-particle impurities on the surface of the filtering plate 59, and the sliding block 53 can drive the scraping rod 54 to keep contact with the surface of the filtering plate 59 by the self elastic force of the first spring 52, when the corn grains need to be cleaned, when the fixed block 49 moves, the second connecting rod 55 can drive the cleaning plate 56 to move inside the filtering plate 59, and the cleaning plate 56 moves on the surface of the guide post 57 by the cleaning plate 56, the corn kernels in the filter plate 59 can be cleaned, and impurities and the corn kernels can be classified and collected through the collection frame 6; the above is the overall working principle of the present invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a corn threshing device's quantitative mechanism, changes roller (3) including thresher main part (1), first commentaries on classics roller (2), second, its characterized in that: the top internally mounted of thresher main part (1) has first commentaries on classics roller (2), the top of thresher main part (1) is installed the second through the bearing and is changeed roller (3), the side of thresher main part (1) is provided with dosing mechanism (7), the inside of dosing mechanism (7) is provided with stop gear (8), stop gear (8) include second pivot (81), second pivot (81) are installed through the bearing to the inside of dosing mechanism (7), and the surface of second pivot (81) has cup jointed first stirring piece (82), the central point department of putting of second pivot (81) has cup jointed quantitative section of thick bamboo (83), the surface of quantitative section of thick bamboo (83) offsets with the inner wall of pan feeding mouth (84), and the inside of pan feeding mouth (84) is inserted and is equipped with catch bar (85), the one end surface that pan feeding mouth (84) was kept away from to catch bar (85) has cup jointed second stirring piece (86), one end of the push rod (85) inserted in the feeding port (84) is fixedly connected with a guide plate (87), the quantitative mechanism (7) comprises a second belt pulley (71), the surface of the second rotary roller (3) is connected with a first rotary shaft (72) through the second belt pulley (71), the first rotating shaft (72) is arranged in the protective frame (73) through a bearing, a limiting ring (74) is sleeved on the surface of the first rotating shaft (72), and the surface of the limit ring (74) is fixedly connected with a loop bar (75), the inner wall of the loop bar (75) is welded with a third spring (76), and one end of the third spring (76) far away from the inner wall of the loop bar (75) is welded with a telescopic bar (77), one end of the telescopic rod (77) far away from the third spring (76) is fixedly connected with a driving block (78), the surface of the limiting ring (74) is abutted against the surface of the rotating disc (79).

2. The corn threshing apparatus of claim 1, wherein: the limiting ring (74) is arranged to be semicircular, the turntable (79) is arranged to be rectangular, the surfaces of the periphery of the turntable (79) are provided with cambered surfaces, and the surface radian of the limiting ring (74) is the same as that of the cambered surfaces of the periphery of the turntable (79).

3. The corn threshing apparatus of claim 1, wherein: first stirring piece (82) set up to the rectangle, and the both sides surface of first stirring piece (82) is provided with the inclined plane, second stirring piece (86) set up to the rectangle, the both sides surface of second stirring piece (86) is provided with the inclined plane, the inclined plane angle that first stirring piece (82) both sides surface set up is the same with the inclined plane angle that second stirring piece (86) both sides surface set up.

4. The corn threshing apparatus of claim 1, wherein: the quantitative cylinder (83) is cylindrical, and four groups of grooves are formed in the quantitative cylinder (83) at equal intervals.

5. The corn threshing apparatus of claim 1, wherein: two groups of guide plates (87) are symmetrically arranged inside the feeding port (84), and inclined surfaces are arranged on the surfaces of the two groups of guide plates (87).