CN217336517U - Coarse cereals is with flexible ratch line pole combination formula thresher - Google Patents

Abstract

The utility model particularly relates to a grain crop is with flexible ratch line pole combination formula thresher, has solved current grain crop thresher seed grain damage serious, thresh the high, easy jam of loss rate, contain miscellaneous problem that the rate is high, the adaptability is weak. A combined threshing device with telescopic toothed bars and threaded bars for coarse cereals crops is characterized in that a grid concave plate, a motor, a vibration separation sieve and a threaded bar roller are arranged in a frame; the right end of the frame is provided with a main shaft; a supporting shaft is arranged on the left end face of the rasp bar roller, a fixed rod is arranged between the main shaft and the supporting shaft, a connecting sleeve is sleeved on the fixed rod, and a threshing toothed bar is arranged on the connecting sleeve; a centrifugal fan is arranged on the right side of the rasp bar roller; the transmission mechanism comprises a driving wheel, a roller transmission wheel, a fan transmission wheel, a reversing speed reducer input transmission wheel and a crank rocker mechanism. The utility model discloses compact structure reduces the damage to seed grain, has avoided the grid notch board to block up, has reduced the miscellaneous rate of containing after threshing, and applicable in the coarse cereals crop of different grade type has effectively improved adaptability.

Description

Coarse cereals is with flexible ratch line pole combination formula thresher

Technical Field

The utility model relates to the technical field of agricultural machinery, especially, relate to crop thresher, specifically a coarse cereals crop is with flexible ratch line pole combination formula thresher.

Background

With the advance of urban and rural integrated construction and the rapid expansion of industrial industries, the total cultivated land area is continuously reduced, so that the grain yield is improved as much as possible by using the limited cultivated land area while the cultivated land is protected. Coarse cereals account for a great proportion of the total amount of grain supply, and the stability and the income increase of the yield of the coarse cereals play an extremely important role in grain safety. Along with the development of economic level, the coarse cereals are more and more favored by people, and the requirements on the coarse cereals are increasingly increased, so that the significance of increasing the production and income of the coarse cereals is great.

However, practice shows that the existing grain crop thresher has the following problems in use: firstly, the kernel is seriously damaged; secondly, the threshing loss is high, and as the grain size of the millet seeds is small, the sealing condition of the traditional threshing device is not suitable for the requirement of millet threshing, so that the threshing loss is large; thirdly, the threshing mechanism is easy to block when the moisture content of the material is higher; fourthly, the impurity content is high, and the harvested seeds contain a large amount of impurities due to the fact that the cleaning mechanism is not mature enough; fifthly, the thresher has weak adaptability, the types of coarse cereal crops are various, the physical characteristics of various crops are different, and the threshing of different crops is difficult to reach the harvest standard. Therefore, the invention needs to provide a telescopic rod and toothed rod combined threshing device for coarse cereal crops, which solves the technical problems so as to meet the urgent need of production and improve the agricultural mechanization level of the crops.

SUMMERY OF THE UTILITY MODEL

The utility model provides a telescopic toothed bar and threaded bar combined threshing device for coarse cereal crops, which solves the problems of serious seed damage, high threshing loss rate, easy blockage, high impurity content rate and weak adaptability of the existing coarse cereal crop threshing machine.

The utility model discloses an adopt following technical scheme to realize:

a combined threshing device with a telescopic toothed bar and a threaded bar for coarse cereal crops comprises a frame and a transmission mechanism, wherein a grid concave plate with the top end flush with the upper end of the frame is arranged in the frame, an arc-shaped top cover connected with the upper end of the frame is covered above the grid concave plate, a feed hopper is fixedly penetrated through the left front part of the frame, and a discharge outlet is formed in the right rear part of the frame; a threaded rod roller in clearance fit with the bottom end part of the grid concave plate is arranged in the grid concave plate; the right end of the rack is provided with a main shaft connected with the center of the right end face of the rasp bar roller; a supporting shaft connected with the left end of the rack is arranged in the center of the left end face of the rasp bar roller, a fixing rod positioned right above the main shaft and the supporting shaft is arranged between the main shaft and the supporting shaft, a connecting sleeve is sleeved on the fixing rod, a plurality of threshing toothed bars which are radially arranged and spirally distributed are arranged on the connecting sleeve, and the threshing toothed bars penetrate through the side wall of the rasp bar roller;

the frame is also provided with a motor and a vibration separation sieve, the vibration separation sieve is composed of a conveying sieve plate, a fine sieve and a coarse sieve which are connected in turn from left to right, and the conveying sieve plate is positioned below the grid concave plate; the right side of the coarse screen is connected with a tailing conveying hopper with a backward discharge port, and the lower side of the coarse screen is connected with a seed conveying hopper with a forward discharge port; a centrifugal fan with an air inlet facing the fine screen is arranged on the right side of the rasp bar roller; the bottom of the vibration separation screen is fixedly connected with a driving rod; four supporting connecting rods hinged with the vibrating separating screen and the frame are arranged between the vibrating separating screen and the frame;

the transmission mechanism comprises a driving wheel fixedly assembled on an output shaft of the motor, a roller driving wheel fixedly assembled at the right end of the main shaft, a fan driving wheel fixedly assembled at the left end part of a rotating shaft of the centrifugal fan and a reversing speed reducer input driving wheel, wherein the roller driving wheel, the fan driving wheel and the reversing speed reducer input driving wheel are respectively in transmission connection with the driving wheel; a crank rocker mechanism is arranged between the output end of the reversing speed reducer and the bottom end part of the driving rod.

Further, the centrifugal fan comprises a volute, blades are arranged in the volute, an air inlet is formed in the bottom end of the volute, and an air outlet is formed in the rear side of the volute.

Furthermore, the connecting sleeve is formed by arranging a plurality of connecting sleeve bodies left and right, a toothed bar sleeve which is integrated with the connecting sleeve body and is provided with a radial hole is arranged on each connecting sleeve body, one end of the threshing toothed bar penetrates into the toothed bar sleeve, and a toothed bar connecting pin shaft which penetrates through the threshing toothed bar is arranged on the side wall of the toothed bar sleeve.

Furthermore, three rows of threshing toothed bars are arranged along the axial direction of the fixed rod, and the three rows of threshing toothed bars are uniformly distributed along the circumferential direction of the fixed rod; the side wall of the rasp bar roller corresponding to each threshing toothed bar is provided with a toothed bar fixed hinged support, and a linear bearing sleeved on the threshing toothed bar and two deep groove ball bearings which are arranged outside the linear bearing and distributed up and down are arranged in the toothed bar fixed hinged support.

Furthermore, a right bearing is arranged at the left end part of the main shaft, a right bearing sleeve is sleeved on the right bearing, a right shaft sleeve which is integrated with the right bearing sleeve into a whole is sleeved at the right end part of the fixed rod, and a right connecting pin shaft penetrating through the fixed rod is arranged on the side wall of the right shaft sleeve; a left bearing is arranged between the supporting shaft and the left side wall of the rasp bar roller, a supporting shaft sleeve is connected to the supporting shaft on the right side of the left bearing through a flat key, a left shaft sleeve of an integrated structure with the supporting shaft sleeve is sleeved at the left end of the fixing rod, and a left connecting pin shaft penetrating through the fixing rod is arranged on the side wall of the left shaft sleeve.

Furthermore, the grid concave plate comprises a plurality of rib plates which are axially arranged and are arranged at equal intervals along the circumferential direction, arc-shaped spokes are fixed at the left end and the right end of each rib plate, a plurality of grid bars penetrate through all the rib plates along the circumferential direction, and the grid bars are arranged at equal intervals along the axial direction.

Furthermore, the front end part and the rear end part of the grid concave plate are horizontally provided with two fixing plates, the lower surface of each fixing plate is fixed with an adjusting stud, the outer side of each adjusting stud is provided with an adjusting spring positioned above the rack, the lower part of each adjusting stud extends out of the rack, and the lower end of each adjusting stud is screwed with an adjusting nut and a locking nut.

Furthermore, the rasp bar roller comprises a hexagram-shaped left amplitude plate and a hexagram-shaped right amplitude plate, the corners of the hexagram-shaped left amplitude plate and the hexagram-shaped right amplitude plate are both fixed with a D-shaped rasp bar which is transversely arranged, the D-shaped rasp bar is provided with tooth grooves which are spirally distributed along the axial direction of the D-shaped rasp bar, and an iron plate which forms a closed cavity with the hexagram-shaped left amplitude plate and the hexagram-shaped right amplitude plate and has a hexagram-shaped section is arranged in the D-shaped rasp bar.

Furthermore, the driving wheel and the roller driving wheel and the fan driving wheel are in transmission connection through a continuously variable transmission; the driving wheel is connected with the input driving wheel of the reversing speed reducer through a belt in a transmission way.

The utility model designs a brand-new threshing device, compares with current threshing device, has following beneficial effect: (1) the threshing device has compact structure and reduces the damage to the grains by the combined structure of the telescopic threshing toothed bar and the grain bar. (2) Through the grid concave plate of elastic support, avoid blocking phenomenon, cooperate with the grid concave plate through rasp pole cylinder and threshing teeth pole at rotatory in-process simultaneously and rub the material, strike the separation of accomplishing seed grain and straw, threshing teeth pole plays the turnover to the material through eccentric rotation, carries the effect, has avoided the straw winding and has blockked up the phenomenon of grid concave plate. (3) By improving the sealing performance, the threshing loss rate is reduced. (4) Through the structural design of the centrifugal fan and the vibration separation sieve, the cleaning function of the threshed materials is realized, the separation effect is good, and the impurity rate after threshing is reduced. (5) The grid concave plate through elastic support adjusts the distance between the grid concave plate and the rasp bar roller, so that the threshing device can be suitable for different types of coarse cereal crops, and the adaptability is effectively improved.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic side view of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the rasp bar drum of the present invention;

FIG. 4 is a side schematic view of FIG. 3;

FIG. 5 is a schematic view of the external structure of the rasp bar drum of the present invention;

FIG. 6 is a schematic view of the structure of the grid concave plate of the present invention;

FIG. 7 is a schematic top view of FIG. 6;

FIG. 8 is a schematic structural view of a vibrating screen according to the present invention;

fig. 9 is a schematic structural view of a centrifugal fan according to the present invention;

FIG. 10 is a side view schematic of FIG. 9;

fig. 11 is a schematic structural diagram of the volute of the present invention;

FIG. 12 is a diagram of the drive train of the present invention;

fig. 13 is a schematic layout of the crank-rocker mechanism of the present invention.

In the figure, 1-a frame, 2-a grid concave plate, 3-an arc top cover, 4-a feed hopper, 5-a discharge port, 6-a rasp bar roller, 7-a main shaft, 8-a support shaft, 9-a fixed rod, 10-a connecting sleeve, 11-a threshing toothed bar, 12-a motor, 13-a vibration separating screen, 14-a conveying sieve plate, 15-a fine sieve, 16-a coarse sieve, 17-a miscellaneous residue conveying hopper, 18-a seed conveying hopper, 19-an air inlet, 20-a drive rod, 21-a support connecting rod, 22-a drive wheel, 23-a roller drive wheel, 24-a fan drive wheel, 25-a reversing speed reducer input drive wheel, 26-a crank rocker mechanism, 27-a volute, 28-a blade and 29-an air outlet, 30-toothed bar sleeve, 31-toothed bar connecting pin shaft, 32-toothed bar fixed hinge base, 33-linear bearing, 34-deep groove ball bearing, 35-right bearing, 36-right bearing sleeve, 37-right bearing sleeve, 38-right connecting pin shaft, 39-left bearing, 40-supporting bearing sleeve, 41-left bearing sleeve, 42-left connecting pin shaft, 43-ribbed plate, 44-arc spoke, 45-grid bar, 46-fixing plate, 47-adjusting stud, 48-adjusting spring, 49-adjusting nut, 50-locking nut, 51-hexagon left web plate, 52-hexagon right web plate, 53-D-shaped threaded bar, 54-iron plate, 55-stepless transmission and 56-belt.

Detailed Description

A combined threshing device with telescopic toothed bars and threaded bars for coarse cereal crops is shown in attached figures 1-4 and comprises a frame 1 and a transmission mechanism, wherein a grid concave plate 2 with the top end flush with the upper end of the grid concave plate is arranged in the frame 1, an arc-shaped top cover 3 connected with the upper end of the frame 1 is covered above the grid concave plate 2, a feed hopper 4 is fixedly penetrated through the left front part of the frame 1, and a discharge opening 5 is formed in the right rear part of the frame 1; a rasp bar roller 6 which is in clearance fit with the bottom end part of the grid concave plate 2 is arranged in the grid concave plate; the right end of the frame 1 is provided with a main shaft 7 connected with the center of the right end face of the rasp bar roller 6; a supporting shaft 8 connected with the left end of the rack 1 is arranged in the center of the left end face of the rasp bar roller 6, a fixing rod 9 positioned right above the main shaft 7 and the supporting shaft 8 is arranged between the main shaft and the supporting shaft, a connecting sleeve 10 is sleeved on the fixing rod 9, a plurality of threshing toothed bars 11 which are radially arranged and spirally distributed are arranged on the connecting sleeve 10, and the threshing toothed bars 11 penetrate through the side wall of the rasp bar roller 6;

as shown in the attached drawings 1 and 8, a motor 12 and a vibration separation screen 13 are further arranged in the machine frame 1, the vibration separation screen 13 is composed of a conveying screen plate 14, a fine screen 15 and a coarse screen 16 which are connected in sequence from left to right, and the conveying screen plate 14 is positioned below the grid concave plate 2; the right side of the coarse screen 16 is connected with a tailing conveying hopper 17 with a backward discharge port, and the lower side is connected with a seed conveying hopper 18 with a forward discharge port; the right side of the rasp bar roller 6 is provided with a centrifugal fan of which an air inlet 19 faces the fine screen 15; the bottom of the vibrating separating screen 13 is fixedly connected with a driving rod 20; four supporting connecting rods 21 hinged with the vibrating separating screen 13 and the frame 1 are arranged between the vibrating separating screen and the frame;

as shown in fig. 1 and 12, the transmission mechanism includes a driving wheel 22 fixedly mounted on an output shaft of the motor 12, a roller transmission wheel 23 fixedly mounted on a right end of the main shaft 7, a fan transmission wheel 24 fixedly mounted on a left end portion of a rotating shaft of the centrifugal fan, and a reversing reducer input transmission wheel 25, wherein the roller transmission wheel 23, the fan transmission wheel 24, and the reversing reducer input transmission wheel 25 are respectively in transmission connection with the driving wheel 22; a crank and rocker mechanism 26 is arranged between the output end of the reversing reducer and the bottom end of the driving rod 20.

When threshing operation is carried out, the main shaft 7 is driven to rotate to drive the connecting sleeve 10 and the rasp bar roller 6 to rotate, materials enter between the grid concave plate 2 and the rasp bar roller 6 through the feed hopper 4, then the materials spirally move around the rasp bar roller 6, the materials are grabbed and impacted by the threshing toothed bar 11, the rasp bar roller 6 drives the threshing toothed bar 11 to eccentrically rotate along the center of the rasp bar roller 6, when the threshing toothed bar 11 retracts at the bottom of the rasp bar roller 6, under the matching of the rasp bar roller 6 and the grid concave plate 2, the ears and the stalks are combed, extruded, impacted and kneaded, so that separation of grains from the ears, the ears from the stalks is realized, and the stalks spirally move rightwards under the action of the rasp bar roller 6 and are discharged out of the machine through the discharge port 5; when the threshing toothed bar 11 extends out of the top of the rasp bar roller 6, the threshing toothed bar further impacts and beats materials under the impact action, separation of seeds which are difficult to be threshed and the stalks is realized, meanwhile, the stalks are smashed, further, the spiral distribution of the rasp bar roller 6 can well tumble and push the materials to the right, the long stalks are taken away from the minimum gap between the rasp bar roller 6 and the grid concave plate 2, the stalks are prevented from being wound on the rasp bar roller 6 to cause the blocking phenomenon, and the blocking of the grid concave plate 2 is avoided; the threshed materials such as seeds, sundries, glumes, short stems and the like fall into a vibration separation sieve 13 through a grid concave plate 2, when the threshed materials such as the seeds, the sundries, the glumes, the short stems and the like enter a fine sieve 15 in the conveying process of the vibration separation sieve 13, light sundries, the glumes and the short stems on the fine sieve 15 are sucked and blown out of the machine through the centrifugal action of a centrifugal fan, and meanwhile, fine sundries such as dust and the like fall downwards through the fine sieve 15 and are discharged out of the machine; the clean seeds on the fine screen 15 pass through the coarse screen 16 and then enter a seed conveying hopper 18 for collection, and the rest mixture which is not sucked away by the centrifugal fan falls into a waste conveying hopper 17. Overcomes the problems of serious damage to grains, high threshing loss rate, easy blockage, high impurity content and weak adaptability of the existing grain crop thresher.

When the corrugated bar driving device works, the motor 12 is started, on one hand, the roller driving wheel 23 and the fan driving wheel 24 are driven to rotate, and further, the spindle 7 and a rotating shaft of a centrifugal fan are driven to rotate, so that the corrugated bar roller 6 and the centrifugal fan are driven to work; on the other hand, the driving wheel 22 drives the input transmission wheel 25 of the reversing speed reducer to rotate, and further drives the crank and rocker mechanism 26 to move, so that the vibration of the vibration separation screen 13 is realized.

As shown in figure 1Four support connecting rods 21 and a driving rod 20 form a parallel four-bar mechanism which is arranged below the vibrating separating screen 13; wherein, the upper end of the driving rod 20 is fixedly connected to the middle part of the bottom surface of the vibrating screen 13, and the lower end is connected with the reversing speed reducer through a crank and rocker mechanism 26; the length of the supporting connecting rod 21 is 180mm, and the crank working speed n of the crank rocker mechanism 26 ₆ 233.3r/min, 18.5mm crank radius r and 325mm connecting rod length.

As shown in fig. 13, the vibrating screen 13 is mounted on the frame 1 through the support links 21BC and AD, the crank OE rotates around the fixed point O of the frame 1, the crank is connected to the driving rod 20FG through the link EF, the crank OE and the link EF form the crank link mechanism 26, and the vibrating screen 13 is driven by the crank link mechanism 26 to vibrate back and forth, so that the vibrating screen 13 completes the transportation and separation of the separated materials. In the working process of the vibration separation screen 13, the stripping material is thrown forwards and upwards under the action of the vibration of the screen body, and is thrown forwards and upwards by the screen body sometimes, and falls into the screen body sometimes; each throwing movement can produce a section of displacement of the threshed object in the horizontal direction, thus realizing the continuous conveying of the threshed object. In the figure, the support link 21 is at an angle α of 68 ° to the horizontal; the link EF forms an angle β of 81 ° with the drive rod 20 FG.

The arc-shaped top cover 3 can completely shield the rasp bar roller 6, thereby improving the sealing performance of the threshing device, preventing the loss of small-grain-size grains and reducing the threshing loss rate.

The distance between the fixed rod 9 and the rasp bar drum 6 is 50mm, and is eccentric right above the center of the rasp bar drum 6. Referring to the handbook of agricultural machinery design, the calculation formula of the length L and the eccentricity e of the threshing toothed bar 11 is as follows:

in the formula: d, rotating the outer diameter (mm) of the threshing toothed bar 11 when the threshing toothed bar extends out, wherein D is 470 mm; d is the rotating outer diameter (mm) when the threshing toothed bar 11 retracts, and d is 362 mm;

in order to make the machine reach the optimum working state, the length L of the threshing rack 11 is 235mm and the eccentricity e is 50mm according to the formula.

As shown in fig. 8, the size of the vibrating separating screen 13 is determined according to the overall size of the threshing device, and the length of the conveying screen plate 14 is 1033.5mm, and the width is 520 mm; the fine screen 15 is a 35-mesh woven screen; the coarse screen 16 is a 5-mesh woven screen with a width of 520 mm. Minimum effective length L of coarse screen 16 _min Reference GB/T8679-1988 grain precleaning test method is shown as the following formula:

in the formula: q-throughput per unit time (kg/s), the design feed being Q ₁ 0.8kg/s, so the maximum treatment capacity Q per unit time is 0.8 kg/s; q-the unit sieve length treatment capacity kg/(mm.s) of the vibrating screen, and the reference is made to the grain precleaning test method GB/T8679-1988, wherein q is 250 kg/(cm.h) is 0.00694 kg/(mm.s). Calculating the minimum effective length L of the coarse screen 16 _min ＝115mm。

The longer the length of the coarse screen 16, the better the separation effect, while considering the compactness of the body size. The designed length L of the coarse screen 16 is 2.5 · L _min 287.5 mm. The grain seed conveying hopper 18 is arranged right below the coarse screen 16, the natural angle of repose of the oat grains is 31.42 degrees and the friction angle with Q235 steel is 25.1 degrees through measurement, so the inclination angle of a back plate of the grain seed conveying hopper 18 is 40 degrees, the smooth discharging is ensured, and the residual rate is reduced. Similarly, the impurity and residue conveying hopper 17 is positioned behind the coarse screen 16, and the un-threshing and long straws are discharged out of the machine through the impurity and residue conveying hopper 17.

As shown in fig. 1, 9-11, the centrifugal fan includes a volute 27, a vane 28 is disposed in the volute 27, an air inlet 19 is disposed at a bottom end of the volute 27, and an air outlet 29 is disposed at a rear side of the volute 27.

The centrifugal fan is composed of a fan driving wheel 24, a transmission shaft, a volute 27, an impeller, an air inlet channel, an air exhaust channel and the like. The spiral casing 27 adopts a spiral casing; the impeller is a six-blade forward curved blade, and the blade is cut at an angle. When the centrifugal fan works, power is provided by the transmission mechanism through the fan transmission wheel 24, the fan transmission wheel 24 drives the impeller to rotate through the transmission shaft, the impeller rotates to push air to rotate together, and the air is discharged out of the centrifugal fan from the air exhaust duct under the action of centrifugal force; because the air is continuously discharged, negative pressure is formed inside the volute casing 27, and the external air continuously enters the volute casing 27 through the air inlet channel, continuous airflow is formed between the air inlet channel and the air exhaust channel of the centrifugal fan, the mechanical energy is converted into air kinetic energy, the air can obtain certain dynamic pressure and static pressure when entering the volute casing 27 to flow, the air has high flowing speed, and the air flow carries impurities sucked from the air inlet to be discharged out of the threshing device together in the flowing process, so that the air flow cleaning work is completed.

As shown in FIG. 11, the spiral volute 27 is a spiral volute, and the side length of the square in the figure is A/4, R ₁ 、R ₂ 、R ₃ 、R ₄ The radius of an arc drawn by taking four vertex angles of a square as the circle center is as follows:

in the formula D ₂ Impeller diameter (mm), D ₂ 300 mm; a is the distance (mm) between the outer diameter of the impeller and the bottom of the volute, and A is 88 mm. Obtaining R ₁ ＝161mm；R ₂ ＝183mm；R ₃ ＝205mm；R ₄ ＝227mm；

Fan impeller inner diameter D ₁ ：

D ₁ ＝(0.5～0.6)D ₂ (mm)

In the formula D ₂ Diameter mm, D of the impeller ₂ 300 mm. The calculation coefficient is 0.6 to obtain D ₁ ＝180mm。

As shown in fig. 1 and fig. 3, the connecting sleeve 10 is composed of a plurality of connecting sleeve bodies arranged left and right, each connecting sleeve body is provided with a toothed bar sleeve 30 which is integrated with the connecting sleeve body and has a radial hole, one end of the threshing toothed bar 11 penetrates through the toothed bar sleeve 30, and the side wall of the toothed bar sleeve 30 is provided with a toothed bar connecting pin 31 which penetrates through the threshing toothed bar 11.

The structural design ensures the free rotation of the threshing toothed bar 11 on the premise that the fixed rod 9 does not rotate, and realizes the reliable connection of the threshing toothed bar 11 and the connecting sleeve 10.

As shown in the attached drawings 1-4, the threshing toothed bars 11 are arranged in three rows along the axial direction of the fixed rod 9, and the three rows of threshing toothed bars 11 are uniformly distributed along the circumferential direction of the fixed rod 9; the side wall of the rasp bar roller 6 corresponding to each threshing toothed bar 11 is provided with a toothed bar fixed hinged support 32, and a linear bearing 33 sleeved on the threshing toothed bar 11 and two deep groove ball bearings 34 which are arranged outside the linear bearing 33 and distributed up and down are arranged in the toothed bar fixed hinged support 32.

The threshing toothed bar 11 adopts a three-direction spiral configuration, so that materials are conveniently conveyed to the right side, and the toothed bar fixing hinged support 32 is matched with the linear bearing 33 and the deep groove ball bearing 34, so that the threshing toothed bar 11 is enabled to penetrate through the stability of the rasp bar roller 6, and meanwhile, the radial movement of the threshing toothed bar 11 on the rasp bar roller 6 is not influenced.

As shown in fig. 3, a right bearing 35 is arranged at the left end of the main shaft 7, a right bearing sleeve 36 is sleeved on the right bearing 35, a right shaft sleeve 37 which is integrated with the right bearing sleeve 36 is sleeved at the right end of the fixing rod 9, and a right connecting pin 38 which penetrates through the fixing rod 9 is arranged on the side wall of the right shaft sleeve 37; a left bearing 39 is arranged between the support shaft 8 and the left side wall of the rasp bar roller 6, a support shaft sleeve 40 is connected to the support shaft 8 on the right side of the left bearing 39 through a flat key, a left shaft sleeve 41 which is integrated with the support shaft sleeve 40 is sleeved at the left end of the fixed rod 9, and a left connecting pin shaft 42 which penetrates through the fixed rod 9 is arranged on the side wall of the left shaft sleeve 41.

Due to the structural design, when the main shaft 7 and the rasp bar roller 6 are in a rotating state, the fixing rod 9 and the supporting shaft 8 are kept fixed, and the flat key is arranged to ensure that the fixing rod 9 is always positioned right above the supporting shaft 8 and the main shaft 7.

As shown in fig. 6 and 7, the grid concave plate 2 includes a plurality of rib plates 43 disposed axially and arranged at equal intervals along the circumferential direction, the left and right ends of the rib plates 43 are fixed with arc spokes 44, and a plurality of grid bars 45 penetrate through all the rib plates 43 along the circumferential direction, and the grid bars 45 are arranged at equal intervals along the axial direction.

The rib 43 is made of a steel plate having a thickness of 2.5 mm; the diameter of the grid bars 45 is 3 mm; the rib plates 43 and the grids 45 are mutually crossed to form grid square holes with the size of 11mm multiplied by 11 mm; the grid recess plate 2 has a total length of 1077.5mm in the axial direction, a width of 642mm in the circumferential direction, and a recess plate wrap angle of 180 °.

As shown in fig. 6, two fixing plates 46 are horizontally arranged at the front end and the rear end of the grid concave plate 2, an adjusting stud 47 is fixed on the lower surface of each fixing plate 46, an adjusting spring 48 located above the rack 1 is arranged outside the adjusting stud 47, the lower part of the adjusting stud 47 extends out of the rack 1, and an adjusting nut 49 and a locking nut 50 are screwed at the lower end of the adjusting stud 47.

The purpose of elastically adjusting the grid concave plate 2 is achieved through the structural design of the adjusting stud 47, the adjusting spring 48, the adjusting nut 49 and the locking nut 50, the compression degree of the adjusting spring 48 is changed by adjusting the heights of the adjusting nut 49 and the locking nut 50 on the adjusting stud 47, then the gap between the grid concave plate 2 and the rasp bar roller 6 is adjusted, and the adjusting range is 0-15 mm. The fixing plate 46 and the adjusting stud 47 are fixed by welding. The structure is designed to be capable of adjusting the position of the grid concave plate 2 to slow down blockage; secondly, can be according to the characteristic of threshing crop, adjust the interval of grid concave 2 and rasp bar cylinder 6 for this thresher can be applicable to different coarse cereals effects, and the suitability further promotes.

As shown in fig. 4 and 5, the rasp bar drum 6 includes a left web 51 in a hexagon star shape and a right web 52 in a hexagon star shape, the corners of the left web 51 in a hexagon star shape and the right web 52 in a hexagon star shape are both fixed with a D-shaped rasp bar 53 placed transversely, the D-shaped rasp bar 53 is provided with tooth grooves spirally distributed along the axial direction thereof, and an iron plate 54 which forms a closed cavity with the left web 51 in a hexagon star shape and the right web 52 in a hexagon star shape and has a section in the D-shaped rasp bar 53.

The rasp bar roller 6 adopts a structure of six D-shaped rasp bars 53, the rasp bar roller 6 and the grid concave plate 2 are utilized to rub and comb crops, separation of grains and straws is completed, materials are pushed rightwards in the rotating process of the D-shaped rasp bars 53, and the iron plate 54 is convenient for fixing the fixed hinged support 32 of the toothed bar when the straws are prevented from being wound. The rasp bar cylinder 6 has a length of 1031.5mm and a maximum diameter of 370 mm. The D-shaped threaded rod 53 is connected with the iron plate 54 by a bolt.

As shown in fig. 12, the driving wheel 22 and the roller driving wheel 23, and the driving wheel 22 and the fan driving wheel 24 are in transmission connection through a continuously variable transmission 55; the drive wheel 22 is drivingly connected to the reverse reducer input drive wheel 25 by a belt 56.

The motor 12 is located below the shaker screen 13, to the right of the frame 1. The motor 12 is connected to a commutation reducer, a continuously variable transmission 55, through a belt. The reversing speed reducer is a WPA speed reducer and is positioned below the vibrating separating screen 13, and the speed reduction ratio is 1: 10. the continuously variable transmission 55 is of the type AK185-28+ PE216-28-8, is located on the outer side of the frame 1, and has a transmission range of 1: 4.

as shown in figure 12, in order to make the whole machine compact in structure, the centrifugal fan and the rasp bar roller 6 adopt a coaxial structure and respectively transmit to meet the requirements of different rotating speeds during threshing and cleaning. The main shaft 7 is connected with the motor 12 through a continuously variable transmission 55, and the speed change range of the continuously variable transmission 55 is 1: 4; the rotating shaft of the centrifugal fan is connected with the input and output shafts of the motor 12 through the infinitely variable transmission 55, but the transmission does not pass through the infinitely variable transmission 55; rotation speed of the motor 12: n is ₃ ＝1400r/min。

Output shaft rotation speed of the continuously variable transmission 55: n is ₅ ＝350～5600r/min；

Rotation speed of the main shaft 7:

rotation shaft rotation speed of centrifugal fan:

the speed of an input shaft of the reversing speed reducer is as follows:

rotational speed of drive shaft of vibration separation screen 13:

in the formula (d) ₁ Diameter of the drum drive wheel 23, d ₁ ＝300mm；

d ₂ Diameter of the fan drive wheel 24, d ₂ ＝100mm；

d ₃ Diameter of the drive wheel 22, d ₃ ＝100mm；

d ₄ Diameter of input shaft pulley of reversing speed reducer, d ₄ ＝60mm；

d ₅ Diameter of belt pulley of output shaft of continuously variable transmission 55, d ₅ ＝100mm。

In the specific implementation process, a feed inlet is formed in the front left part of the rack 1, and the feed hopper 4 is connected with the feed inlet through a bolt I. The curvature of the left front part of the grid concave plate 2 becomes smaller so as to be connected with the feed hopper 4 and the feed inlet; the curvature of the right rear part of the grid concave plate 2 becomes smaller so as to be connected with the discharge opening 5; the structural design further improves the sealing performance of the threshing device.

Claims (9)

1. The utility model provides a grain crop is with flexible ratch line pole combination formula thresher which characterized in that: the automatic feeding machine comprises a rack (1) and a transmission mechanism, wherein a grid concave plate (2) with the top end flush with the upper end of the grid concave plate is arranged in the rack (1), an arc-shaped top cover (3) connected with the upper end of the rack (1) is covered above the grid concave plate (2), a feeding hopper (4) is fixedly penetrated through the left front part of the rack (1), and a discharge outlet (5) is formed in the right rear part of the rack (1); a threaded rod roller (6) in clearance fit with the bottom end part of the grid concave plate (2) is arranged in the grid concave plate; the right end of the frame (1) is provided with a main shaft (7) connected with the center of the right end face of the rasp bar roller (6); a supporting shaft (8) connected with the left end of the rack (1) is arranged in the center of the left end face of the rasp bar roller (6), a fixing rod (9) positioned right above the main shaft (7) and the supporting shaft (8) is arranged between the main shaft and the supporting shaft, a connecting sleeve (10) is sleeved on the fixing rod (9), a plurality of threshing toothed bars (11) which are radially arranged and spirally distributed are arranged on the connecting sleeve (10), and the threshing toothed bars (11) penetrate through the side wall of the rasp bar roller (6);

a motor (12) and a vibration separation sieve (13) are also arranged in the frame (1), the vibration separation sieve (13) is composed of a conveying sieve plate (14), a fine sieve (15) and a coarse sieve (16) which are connected in turn from left to right, and the conveying sieve plate (14) is positioned below the grid concave plate (2); the right side of the coarse screen (16) is connected with a tailing conveying hopper (17) with a backward discharge port, and the lower side is connected with a seed conveying hopper (18) with a forward discharge port; the right side of the rasp bar roller (6) is provided with a centrifugal fan of which an air inlet (19) faces the fine screen (15); the bottom of the vibrating separating screen (13) is fixedly connected with a driving rod (20); four supporting connecting rods (21) hinged with the vibrating separating screen (13) and the frame (1) are arranged between the vibrating separating screen and the frame;

the transmission mechanism comprises a driving wheel (22) fixedly assembled on an output shaft of the motor (12), a roller transmission wheel (23) fixedly assembled at the right end of the main shaft (7), a fan transmission wheel (24) fixedly assembled at the left end part of a rotating shaft of the centrifugal fan and a reversing speed reducer input transmission wheel (25), wherein the roller transmission wheel (23), the fan transmission wheel (24) and the reversing speed reducer input transmission wheel (25) are respectively in transmission connection with the driving wheel (22); a crank-rocker mechanism (26) is arranged between the output end of the reversing speed reducer and the bottom end of the driving rod (20).

2. The combined threshing device of claim 1, wherein the threshing device comprises: the centrifugal fan comprises a volute (27), blades (28) are arranged in the volute (27), an air inlet (19) is formed in the bottom end of the volute (27), and an air outlet (29) is formed in the rear side of the volute (27).

3. The combined threshing device of claim 1, wherein the threshing device comprises: the connecting sleeve (10) is formed by arranging a plurality of connecting sleeve bodies left and right, a toothed bar sleeve (30) which is integrated with the connecting sleeve bodies and is provided with a radial hole is arranged on each connecting sleeve body, one end of a threshing toothed bar (11) penetrates through the toothed bar sleeve (30), and a toothed bar connecting pin shaft (31) which penetrates through the threshing toothed bar (11) is arranged on the side wall of the toothed bar sleeve (30).

4. The combined threshing device of claim 1, wherein the threshing device comprises: the threshing toothed bars (11) are arranged in three rows along the axial direction of the fixed rod (9), and the three rows of threshing toothed bars (11) are uniformly distributed along the circumferential direction of the fixed rod (9); the side wall of the rasp bar roller (6) corresponding to each threshing toothed bar (11) is provided with a toothed bar fixed hinged support (32), and a linear bearing (33) sleeved on the threshing toothed bar (11) and two deep groove ball bearings (34) which are arranged on the outer side of the linear bearing (33) and distributed up and down are arranged in the toothed bar fixed hinged support (32).

5. The combined threshing device of claim 1, wherein the threshing device comprises: a right bearing (35) is arranged at the left end of the main shaft (7), a right bearing sleeve (36) is sleeved on the right bearing (35), a right shaft sleeve (37) which is integrated with the right bearing sleeve (36) into a whole is sleeved at the right end of the fixed rod (9), and a right connecting pin shaft (38) penetrating through the fixed rod (9) is arranged on the side wall of the right shaft sleeve (37); a left bearing (39) is arranged between the support shaft (8) and the left side wall of the rasp bar roller (6), a support shaft sleeve (40) is connected to the support shaft (8) on the right side of the left bearing (39) through a flat key, a left shaft sleeve (41) which is integrated with the support shaft sleeve (40) is sleeved at the left end of the fixing rod (9), and a left connecting pin shaft (42) which penetrates through the fixing rod (9) is arranged on the side wall of the left shaft sleeve (41).

6. The combined threshing device of claim 1, wherein the threshing device comprises: the grid concave plate (2) comprises a plurality of rib plates (43) which are axially arranged and are arranged at equal intervals along the circumferential direction, arc-shaped spokes (44) are fixed at the left end and the right end of each rib plate (43), a plurality of grid bars (45) penetrate through all the rib plates (43) along the circumferential direction, and the grid bars (45) are arranged at equal intervals along the axial direction.

7. The combined threshing device of claim 1, wherein the threshing device comprises: two fixing plates (46) are horizontally arranged at the front end part and the rear end part of the grid concave plate (2), an adjusting stud (47) is fixed on the lower surface of each fixing plate (46), an adjusting spring (48) located above the rack (1) is arranged on the outer side of each adjusting stud (47), the lower part of each adjusting stud (47) extends out of the rack (1), and an adjusting nut (49) and a locking nut (50) are screwed at the lower end of each adjusting stud.

8. The combined threshing device of claim 1, wherein the threshing device comprises: the rasp bar roller (6) comprises a hexagram-shaped left web (51) and a hexagram-shaped right web (52), the corners of the hexagram-shaped left web (51) and the hexagram-shaped right web (52) are both fixed with a D-shaped rasp bar (53) which is transversely placed, the D-shaped rasp bar (53) is provided with tooth grooves which are spirally distributed along the axial direction of the D-shaped rasp bar, and an iron plate (54) which forms a closed cavity with the hexagram-shaped left web (51) and the hexagram-shaped right web (52) and has a hexagram-shaped cross section is arranged in the D-shaped rasp bar (53).

9. The combined threshing device of claim 1, wherein the threshing device comprises: the driving wheel (22) is in transmission connection with the roller transmission wheel (23) and the driving wheel (22) is in transmission connection with the fan transmission wheel (24) through a stepless speed changer (55); the driving wheel (22) is in transmission connection with an input transmission wheel (25) of the reversing speed reducer through a belt (56).

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