JPH07132017A - Thresher - Google Patents

Abstract

PURPOSE:To remarkably improve the threshing efficiency without causing the damage or blowoff of cereal grains. CONSTITUTION:This thresher is provided by dividing a threshing drum 2 into a threshing drum (2A) on the side of the starting end provided with helical continuous threshing teeth 17 on the outer peripheral surface and a threshing drum (2B) on the side of the terminal end equipped with nearly inverted U-shaped individual threshing teeth 16 on the outer peripheral surface and rotating the threshing drum (2A) on the side of the starting end at a higher speed than that of the threshing drum (2B) on the side of the terminal end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing device provided in a harvester or combine harvester.

[0002]

BACKGROUND OF THE INVENTION Generally,
This seed threshing device is configured to thresh the stem culms conveyed from the starting end to the terminating end of the handling chamber by rotating a handling cylinder having handling teeth on the outer peripheral surface. And among the above-mentioned handling teeth, the handling tooth provided at the starting end portion of the handling barrel performs shedding action while introducing the tip portion of the culm, and the handling tooth provided at the middle portion of the handling barrel is left untreated. In order to prevent shattering, the shredding action is performed continuously, and the cuttings that circulate in the handling chamber without leaking from the net are processed into single grains. The teeth are designed to remove the stab particles that have stabbed into the culm, and also to discharge the particles attached to branch branches that do not leak from the net. However, in the past,
Since all the handling teeth have an independent shape such as an inverted U shape and are distributed in a predetermined pattern over the entire outer peripheral surface of the handling cylinder, at the starting end of the handling cylinder that is responsible for most of the shedding action, The tip of the stem and culm inevitably wraps around the handle tooth, and as a result, a large amount of panicles, adhering buds, straw, etc. are produced, and there is a disadvantage that the threshing efficiency is reduced. Therefore, it is conceivable to improve the threshing efficiency by rotating the handling cylinder at high speed, but if the independently shaped handling tooth is rotated at high speed, it is not permissible to damage the kernel, but the stem of the handling chamber. Due to the fear that the grain will blow out from the culm supply port, the reality is that it cannot be implemented.

[0003]

DISCLOSURE OF THE INVENTION The present invention was devised with the object of providing a threshing apparatus capable of eliminating these drawbacks in view of the above-mentioned circumstances.
In a threshing device in which a stem culm conveyed from the start end to the end side of a handling chamber is threshed by rotation of a handling barrel provided with handling teeth on the outer peripheral surface, the handling barrel is moved in the culm transport direction. It is divided into a plurality of handling cylinders that are lined up in a row, and continuous handling teeth that are spirally continuous are provided on the outer peripheral surface of the starting end side handling cylinder, while the outer peripheral surface of the end side handling cylinder has a predetermined interval and is independent. Is provided, and the starting end side handle cylinder provided with the continuous handle teeth is rotated at a higher speed than the terminal side handle cylinder. Further, the present invention makes it possible to dramatically improve the threshing efficiency without causing damage or blowing of the grain.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a threshing device, and the threshing device 1 leaks down a first handling chamber 3 in which a handling barrel 2 described later is rotatably supported, and an unhandled object in the first handling chamber 3. The first receiving net 4, the second handling chamber 5 to which the untreated material reaching the end of the first handling chamber 3 without leaking from the first receiving net 4 is supplied, and the second handling chamber 5
Processing cylinder 6, which is rotatably supported on the second handling net 6, the second receiving net 7, which leaks the undesired substances in the second handling chamber 5, and the unloaded items which have leaked from the first and second receiving nets 4, 7. An oscillating sorting body 8 for sorting, a sardine fan 9 and a second sorting fan 10 for generating a sorting wind, a first transport body 11 for transporting the first product to a grain tank (not shown),
A second carrier 12 for returning the second object to the starting end of the second handling chamber 5,
A dust-discharging fan 13 for discharging straw and the like out of the machine, a feed chain 14 for sandwiching and conveying the stem culm from the starting end (stem culm supply port 3a) of the first handling chamber 3 toward the end side, the feed chain 1
It is configured by a member such as a straw-conveying chain 15 that conveys the stem culms conveyed to the end of 4 toward the post-processing section.
All of these basic configurations are conventional.

The handling cylinder 2 is formed in a cylindrical shape having a frustoconical stalk introducing part 2a at its starting end.
In the present invention, the handling drum 2 is divided into a pair of handling drums 2A and 2B arranged in the stalk-carrying direction, and the divided handling drums 2A and 2B are independently rotated. There is.

Of the divided handling drums 2A, 2B, a plurality of independent handling teeth 16 each having a predetermined pattern are formed on the outer peripheral surface of the terminal-side handling drum 2B in a predetermined pattern by processing a wire material into a substantially inverted U shape. Although provided, the tip trajectory diameter of the independent handling tooth 16 is set to H.

On the other hand, on the outer peripheral surface of the starting end side handling cylinder 2A, a continuous handling tooth 17 of a continuous shape made of a spirally worked plate material.
(In this embodiment, it is composed of three spiral plate materials). That is, the continuous handling teeth 17 perform the shedding action while positively introducing the stem culms transported into the first handling chamber 3 into the first handling chamber 3 based on the action of the spiral. Since it has a continuous shape, it is possible to almost eliminate the winding around the stem. Further, a plurality of processing teeth 18 protruding in the radial direction are detachably provided at a predetermined interval on the continuous handling tooth 17, and the tip locus diameter of the processing tooth 18 is the independent handling tooth. It is set to have the same diameter as the tip locus diameter H of 16.

Further, the stem culm introduction portion 2a of the starting end side handling barrel 2A
The derivative of this embodiment is constituted by a plurality of (three in this embodiment) guide plates 19 formed by spirally processing a plate material. Then, the guide plate 19 positively introduces the stalks transferred into the first handling chamber 3 into the first handling chamber 3 based on the action of the spiral. The trajectory diameter is set to be the same as the tip trajectory diameter H of the independent handling tooth 16 and the processing tooth 18.
That is, the guide plate 19 is close to the first receiving net 4 and the first handling chamber 3
To block the entrance side of the, the blowing of the grains threshed by the starting end side handling cylinder 2A is effectively blocked, and the grains that are going to accumulate at the starting end of the first receiving net 4 are positively transported to the ending side. Therefore, the clogging caused by the retention of the grains can be eliminated, and the effective leakage area of the first receiving net 4 can be increased.

Reference numeral 20 denotes a diffuser plate provided in a plurality of grooves between the continuous handle teeth 17. The diffuser plate 20 is a stem that is forcibly introduced based on the spiral action of the continuous handle teeth 17. It is designed to act to temporarily retain the culm. That is, by increasing the number of times (time) the continuous handling teeth 17 act on the stem, the threshing efficiency on the starting end side of the first handling chamber 3 is improved, and the cuttings stuck in the stem are effectively used. It can be dropped.
The diffusion plate 20 may have a shape as shown in FIGS. 5 (A), (B), and (C).

Reference numeral 21 denotes a plurality of guide plates arranged on the ceiling of the first handling chamber 3 at predetermined intervals in the stalk transfer direction, and the guide plates 21 are the stalks to be transferred. The guide plate 21 of this embodiment has one end side supported so as to be swingable back and forth, while the other end side is supported so as to slide back and forth based on the operation of the connecting rod 22. There is. That is, since the inclination angle with respect to the rotating direction of the handle barrel can be adjusted, the retention time of the stem can be freely set according to the type and state of the stem.

Reference numeral 23 denotes a straw cutting sickle provided on the inner peripheral surface of the first handling chamber 3 in order to cut a long straw circulating in the first handling chamber 3. It is provided only on the inner peripheral surface on the terminal side of the first handling chamber 3 facing the independent handling teeth 16. That is, on the starting end side of the first handling chamber 3, the starting end side handling barrel 2A rotates at a high speed as described later, and the processing tooth 18 divides the long straw based on the high speed rotation. It has become possible to process long straw without providing it.

By the way, the first receiving network 4 is connected to the first handling room 3
Are provided from the start end to the end, but the opening on the starting end side is set small, while the opening on the terminal end side is set large. That is, the starting end side of the first receiving net 4 leaks only single-grained grains to improve the sorting accuracy, while the terminal end side of the first receiving net 4 is a grain to which some branch stems are attached. By allowing grain leakage and reducing the amount of grains discharged to the second handling chamber 5, the processing load on the second handling chamber 5 is reduced and the grains are discharged from the end of the second handling chamber 5 to the outside of the machine. It is designed to reduce the lost grain as much as possible.

Further, reference numeral 24 is a handling barrel shaft rotatably installed in the first handling chamber 3, and the front and rear boss portions of the terminal-side handling barrel 2B are integrally formed on the rear side of the handling barrel shaft 24. While fixed to
A front and rear boss portion of the starting end side handling barrel 2A is rotatably supported on the front side of the handling barrel shaft 24. That is, the handling barrel shaft 24 functions as the handling barrel shaft 24 for the terminating side handling barrel 2B, while the front boss portion of the starting end side handling barrel 2A functions as the handling barrel shaft 25 of the starting end side handling barrel 2A, and each handling barrel. Based on the drive of the shafts 24 and 25, the handling cylinders 2A and 2B on the start end side and the end end side rotate independently.

Further, reference numeral 26 is a gear case provided on the front surface of the first handling chamber 3, and in the gear case 26, the power input by a pulley 28 provided at the front end of the input shaft 27 is supplied to the rear of the input shaft 27. While the power is transmitted from the sprocket 29 provided at the end to the processing cylinder 6, it is transmitted to the proximal-side handling cylinder shaft 25 and the terminal-side handling cylinder shaft 24 via the intermediate shaft 30 in the gear case 26, but from the input shaft 27 to the starting-end side. Handle barrel 2
A transmission mechanism that can change the rotational speed of each of the handling barrel shafts 25 and 24 is provided in the power transmission path extending to 5 and the handling barrel shaft 24 on the terminal side. This transmission mechanism includes a low speed gear (20T) 31 and a high speed gear (25T) 3 fixedly mounted on the input shaft 27.
2. Low speed gear (40T) fixedly mounted on the terminal side handle barrel shaft 24
33, high speed gear (39T) 34, starting end side handle barrel shaft 25
A low speed gear (36T) 35 and a high speed gear (31T) 36 fixedly mounted on the intermediate shaft 30,
And a first speed change gear 39 including a low speed speed change gear (40T) 37 and a high speed speed change gear (39T) 38, an intermediate shaft 30.
Is slidably fitted on the outside and has a low-speed transmission gear (39T)
40 and a second speed change gear 42 including a high speed speed change gear (41T) 41. That is, the first transmission gear 38 has a low speed position where the low speed gear 31 of the input shaft 27 and the low speed gear 33 of the terminal side handle barrel shaft 24 simultaneously mesh with the low speed transmission gear 37, and the high speed gear 32 and the terminal end of the input shaft 27. The high speed gear 34 of the side handle barrel shaft 24 can be selectively shifted to a high speed position where a high speed shift gear 38 is simultaneously engaged, while the second shift gear 42 is a low speed gear 35 of the starting end side handle barrel shaft 25. To the low speed position where the low speed transmission gear 40 is engaged with the high speed transmission gear 4 of the starting end side handle barrel shaft 25.
1 is configured to be capable of gear shifting operation at a high speed position where 1 is meshed. Therefore, the rotation speed (rotation speed) of the terminal-side handle barrel shaft 24 is changed in two steps (two steps of 500 rpm and 641 rpm when the input rotation speed is 1000 rpm) based on the shift position of the first transmission gear 38. In addition, the number of rotations of the starting side handle barrel shaft 25 can be set to four levels based on the shift positions of the first shift gear 38 and the second shift gear 42 (end side handle barrel shaft 2).
When 4 is 500 rpm, 541 rpm and 661 rpm
The speed can be changed to two stages, i.e., 694 rpm and 847 rpm when the end side handle cylinder shaft 24 is 641 rpm), but in any state, the start end side handle cylinder 2A can be changed to the end side handle cylinder 2B.
The gear ratio is set to rotate at a higher speed than that.

In the embodiment of the present invention constructed as described above, the stem culms transferred to the first handling chamber 3 are threshed by the rotation of the handling barrel 2 provided with the handling teeth on the outer peripheral surface. The handling cylinder 2 has a starting end side handling cylinder 2A provided with spiral continuous handling teeth 17 on the outer peripheral surface thereof, and a substantially inverted U-shaped independent handling tooth 1 on the outer peripheral surface thereof.
It is divided into a terminating side handling body 2B provided with 6. In other words, since the spiral continuous handling tooth 17 with almost no culm winding is provided on the starting end side of the handling barrel, which is responsible for most of the shedding action, the occurrence of spike cuttings, branch sprouts-attached grains, cutting straws, etc. is greatly increased. As a result, the leakage efficiency of the first receiving net 4 can be remarkably improved, and at the same time, the terminal-side handling cylinder 2 can be reduced.
The processing load of B can be significantly reduced, and threshing efficiency can be dramatically improved.

Moreover, since the starting end side handling cylinder 2A, which is responsible for most of the threshing action, is rotated at a higher speed than the terminal side handling drum 2B, the threshing efficiency can be further improved, but the threshing action by the high speed rotation is spiral. By the continuous handling teeth 17, the damage to the grain can be significantly reduced as compared with the case where the independent handling teeth 16 are rotated at a high speed.

Further, since the continuous handling teeth 17 provided on the starting end side handling barrel 2A positively introduce the tip portion of the stem culm into the handling chamber 3 based on the conveying action of the spiral, the starting end side handling barrel 2A is The stem-and-culm supply port 3 of the handling room 3 while rotating at high speed
There is no inconvenience that the grains are blown out from a, and furthermore, the grains can be prevented from staying on the first receiving net 4 and the leakage efficiency can be further improved.

Further, in this embodiment, since the stem-culm introduction portion 2a of the starting end side handling barrel 2A is provided with the spiral guide plate 19 whose tip position coincides with the tip locus diameter H of the starting end side handling barrel 2A. ,
The stem culm can be positively introduced based on the conveying action of the spiral, and the guide plate 19 can block the inlet side of the first handling chamber 3 to effectively prevent the blowing of the grain. Moreover, since the guide plate 19 positively conveys the grain to be accumulated at the start end of the first receiving net 4 to the end side, the clogging caused by the retention of the grain can be eliminated and the first receiving net 4 is effective. The leakage area can be expanded to further improve the leakage efficiency.

Further, in the present embodiment, since the diffuser plate 20 is provided in the groove portion between the continuous handle teeth 17, it is possible to temporarily retain the culms and increase the number of times the continuous handle teeth 17 operate. The threshing efficiency on the starting end side of the first handling chamber 3 is not allowed to be improved, and the stuck grains stuck in the stem culm can be effectively dropped.

[0020]

In summary, since the present invention is constructed as described above, although the threshing is performed by rotating the slinging drum having the slinging teeth on the outer peripheral surface, the slinging barrel has the stem The handle cylinder is divided into a plurality of handle cylinders arranged in the transport direction, and continuous handle teeth that are spirally continuous are provided on the outer peripheral surface of the start end side handle cylinder. That is, since the handle tooth on the starting end side, which is responsible for most of the shedding action, is formed into a spiral continuous handle tooth with almost no culm winding, the spike-cutting particles, branch-bearing particles associated with winding,
The occurrence of straw etc. will be greatly reduced. Therefore,
Not only is the leakage efficiency of the receiving net improved, but the processing load on the terminal side handling cylinder is greatly reduced, and as a result, the threshing efficiency can be dramatically improved.

Moreover, since the starting end side handling cylinder, which is responsible for most of the threshing action, is rotated at a higher speed than the terminal side handling drum, the threshing efficiency can be further improved, and the threshing action by the high speed rotation is spiral. Since the continuous tooth handling is performed, the damage to the grain can be significantly reduced as compared with the case where the independently shaped tooth is rotated at high speed.

Further, since the spiral continuous treating teeth provided on the starting end side handling cylinder act so as to positively introduce the tips of the stems into the handling chamber, the starting end side handling cylinder is rotated at a high speed. Even if the grain does not blow out from the handling room supply port,
It is possible to prevent the grain from staying on the receiving net and further improve the leakage efficiency.

[Brief description of drawings]

FIG. 1 is a side view of a threshing device.

FIG. 2 is a front view of the same.

FIG. 3 is a horizontal cross-sectional view of the same as above.

FIG. 4 is a vertical cross-sectional view of a handling cylinder and a gear case.

5A, 5B and 5C are front views showing other examples of the diffusion plate.

[Explanation of symbols]

 1 Threshing Device 2 Handling Cylinder 2A Starting End Side Handling Cylinder 2B Terminal Side Handling Cylinder 3 First Handling Chamber 16 Independent Handling Teeth 17 Continuous Handling Teeth 26 Gear Case

Claims (1)

[Claims] 1. A threshing device in which a stem culm conveyed from a starting end of a handling chamber toward a terminal end is threshed by rotation of a handling barrel provided with handling teeth on an outer peripheral surface thereof. , The stalks are divided into a plurality of handling cylinders arranged in the conveying direction, and a continuous spiral tooth is provided on the outer peripheral surface of the starting end side handling cylinder, while a predetermined interval is provided on the outer peripheral surface of the end side handling cylinder. A threshing device, characterized in that it has independent handling teeth which are arranged independently, and the starting end side handling cylinder provided with the continuous handling teeth is rotated at a higher speed than the terminal side handling cylinder.