JP2000354417A - Threshing drum of thresher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the threshing drum of a thresher capable of accurately carrying out degraining of cut ears and recovery of stuck grains, while carrying out threshing in high performance. SOLUTION: In a thresher in which a threshing drum 1 is installed in a threshing chamber through a shaft, a feed chain 2 is installed along a threshing opening parallel to the threshing drum 1, the drum is divided into a front part and a rear part, the front part is brought to be a first threshing drum 3 and the rear part is brought to be a second threshing drum 5, the second threshing drum 5 is connected to be interlocking with a transmission to rotate in higher speed than that of the first threshing drum 3 and threshing teeth 4a, 4b for degraining are implanted in the first threshing drum 3 and the second threshing drum 5, the implanted density of the threshing teeth 4b of the second threshing drum 5 is specifically brought to be larger than that of the threshing teeth 4a of the first threshing drum 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle of a threshing machine for threshing rice, wheat or other crops.

[0002]

2. Description of the Related Art Conventionally, a handling cylinder is mounted on a shaft in a handling room, a feed chain is provided along an opening parallel to the handling cylinder, and the handling cylinder is divided into front and rear portions. A threshing machine in which the rotation speed of the subsequent second cylinder is higher than the rotation speed is disclosed in
No. 127907. Then, the planting densities of the tooth handling of the first handling cylinder and the second handling cylinder of the threshing machine are made the same.

[0003]

The known threshing machine comprises:
By rotating the second handling cylinder at a higher speed than that of the first handling cylinder, it is possible to reliably and efficiently perform the shedding process without increasing the length of the handling cylinder. However, since the first handling cylinder is loaded with an extremely high resistance at the time of initial shedding, it is impossible to increase the planting density of the handling teeth. Since it was the same as the body, only high-speed rotation (increased peripheral speed) resulted in insufficient processing of long straw, which had been cut off and pulled in, and it was not possible to sufficiently collect sting particles.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a handling cylinder is mounted in a handling room, a feed chain is provided along a handling port parallel to the handling cylinder, and the handling cylinder is divided into front and rear portions. First thing
The handle cylinder and the rear one are referred to as a second handle cylinder, and the second handle cylinder is interlocked with a transmission so as to rotate at a higher speed than the first handle cylinder. In the threshing machine in which the tooth handling is implanted, the above-mentioned problem has been solved by setting the planting density of the tooth handling of the second handling cylinder higher than the planting density of the tooth handling of the first handling cylinder.

[0005]

[Effect] When the spike side of the harvested material such as culm to be threshed is inserted into the handling room from the supply port, and the stock side is supplied to the feed chain and the starting end of the sandwiching rail, the spike portion rotates at a low speed in the first handling. The threshing process is rapidly performed by the drum, and then the process proceeds to the second drum and further threshing is performed. At this time, the second handling cylinder rotates at a high speed, and since the planting density of the tooth handling is higher than the planting density of the tooth handling of the first handling cylinder, the ear straw or the pulled-in long straw rotates at a high speed. The stabs that have been crushed or shredded by high-density tooth handling and that have intervened in the straw culm are reliably combed out, and the straw is discharged from the culm opening with almost no stabs.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with respect to a combine threshing machine shown in the drawings. A large number of teeth are implanted on the outer circumference, a supply port is provided in front of the handling chamber, and a culm opening is provided in the rear, and a holding and conveying device including a feed chain 2 and a clamping rail is provided outside the handling port. It is provided.

The handling cylinder 1 is divided into a first handling cylinder 3 and a second handling cylinder 5 before and after, and a second handling cylinder shaft 6 of the second handling cylinder 5 is provided.
Extends to the front wall 8, the middle portion of which is a long large-diameter cylindrical shaft 6 a for increasing rigidity, and the extended portion penetrates the first handle cylinder shaft 12 formed of a cylindrical shaft. In the inserted state, the front end is rotatably supported via a bearing 10, the rear is rotatably supported on a rear wall 8 a via a bearing 11, and the first handling cylinder shaft 12 has its front end connected to the front wall 8. Are rotatably supported via bearings 13 and 14 on the transmission case 7 fixed to the shaft and the cylindrical shaft 6a of the second handle cylinder shaft 5.

A large number of teeth 4a,..., 4b... Are spirally implanted on the outer peripheral surfaces of the first cylinder 3 and the second cylinder 5 at intervals in the circumferential direction. When the feeding action is not hindered by keeping the interval between the spiral rows constant, the teeth 4a of the first handling cylinder 3 are set so that, for example, the central angle becomes 90 degrees between the front and rear intervals in the row. As shown in FIG. 6, the teeth 4b of the second cylinder are implanted so that, for example, the front and rear spaces in the row are densely spaced at a central angle of 72 degrees. I have. However, the teeth 4b of the second cylinder 5
It is also possible to select the number of lines for one round of the row to be random such as 5 to 9, 5 to 7 lines. In any case, since the implantation density of the teeth 4b of the second handling cylinder 5 is higher than that of the teeth 4a of the first handling cylinder, the teeth of the first handling cylinder 3 are set. 4a... Are combined with the coarseness and the low-speed rotation, so that the spikes immediately after the introduction are easily shed, and the teeth 4b of the second cylinder 5 become dense. Combined with high-speed rotation, the processing of the ears can be reliably performed, and the sting particles can be efficiently removed and taken out of the machine without increasing the length of the second handling cylinder 5. Can be prevented.

Further, a feed tooth 4x at the rear end of the first cylinder 3 is provided.
And the two rows of feed teeth 4y at the front part of the second handling cylinder 5 have a lead angle for shifting the grain culm to the rear culm opening side while threshing, and their height, For example, the feed teeth 4y at the front end are approximately half the height of the normal tooth 4b, and the subsequent feed teeth 4y are the normal tooth 4b and the feed teeth 4y at the front end. , Etc., the front feed teeth 4y on the front side are sequentially lowered. In this case, three or more rows may be provided if the rear side is sequentially raised to the height of the normal handling teeth 4y. The outer peripheral portion of the rear end plate 3a of the first handling cylinder 3 extends rearward and is formed as a large-diameter guide ring 19, and the rear portion of the guide ring 19 is formed on the outer periphery of the front end portion of the second handling cylinder 5. Since it is superposed close to each other, the cereal stem is guided from the first handling cylinder 3 to the second handling cylinder 5 and at the same time, it is possible to prevent straw chips, long straw and the like from entering between them and winding around the shaft. ing.

Furthermore, the input pulley 1 of the transmission case 7
5 is transmitted to an intermediate shaft 20 in the front-rear direction via bevel gears 17 and 18, and a large driving sprocket 21 and a small driving sprocket 22 mounted so as to rotate integrally therewith have a second input shaft 16. The driven small sprocket 23 rotatably supported on the handle cylinder shaft 6 and the driven large sprocket 24 which is keyed to the first handle cylinder shaft 3 so as to rotate integrally are interlocked and connected via chains 25 and 26 to the driven sprocket. Clutch claws are provided on opposing surfaces of the small sprocket 23 and the driven large sprocket 24, and a pawl clutch 27 is slidably spline-fitted therebetween. When the second handling cylinder 5 is engaged with the first handling cylinder 3 (the rotation speed is 500
(when r, p, m) (peripheral speed ratio 1: 1.5)
In such a case, it is possible to extremely prevent the grain from being damaged as in the case of harvesting the seeds. When the pawl clutch 27 is engaged with the clutch pawl of the driven large sprocket 24, the second handle cylinder is rotated. 5 rotates at the same speed as the first handling cylinder 3, that is, at a low speed.

When the second handling cylinder 5 is rotated at a high speed, the second handling cylinder shaft 6 is elongated so as to extend over the entire length of the handling chamber, and the first handling cylinder is provided at an intermediate portion thereof. The rear end of the shaft 12 is supported. In this state, threshing resistance is applied to one side of the first handling cylinder 3 and the second handling cylinder 5, so that the second handling cylinder shaft 6 bends and vibrates. However, since the middle portion is the large-diameter cylindrical shaft 6a, the threshing process can be performed reliably in a state where the vibration is extremely small and the noise is small.

Further, the receiving net 28 in the handling room includes a first receiving net 28a facing the first handling cylinder 3, a second receiving net 28b at the front facing the second handling cylinder 5, and a third receiving net 28b at the rear. Receiving net 28c (dust outlet 2
9 and a portion corresponding to 9). The first receiving net 28a determines the size of these receiving nets as the ninth mouth (a square hole with a side of 8 mm).
The same shall apply hereinafter), the second receiving network 28b is the 14th port, and the third receiving network 28b
In the case of c, the size of the network at the rear is gradually increased from that of the network at the front, such as the 18th mouth. The mesh of each receiving net By configuring as described above, the portion of the first handling cylinder 3 where a large amount of grain is shed is hardly leaked, and the first sorting by the swing sorting body is difficult. It is possible to prevent the performance from deteriorating and increase the amount of the second material. At the front side of the second handling cylinder 5, the second handling cylinder 5 that rotates at a high speed improves the single-graining treatment performance. It promotes leaking, and on the rear side, the single-grained grains can be quickly leaked to reduce stinging grains.

FIG. 3 shows an example in which the leak performance of the receiving networks is further enhanced. The receiving networks 28a, 28b, 28
c is divided into a handle side (front side) at a position deviated 45 degrees from a perpendicular passing through the handle cylinder axis to the back side and a back side opposite thereto, and the first receiving net 28a is positioned on the near side. 28a-1 and the back side 28
a-2, the second receiving net 28b is connected to the front side 28b-1 and the back side 28b-2, and the third receiving net 28c is connected to the front side 28c-1.
And the dust outlet 29, and their appearance, in the order described above,
Small (eighth mouth), extra-small (sixth mouth), large (twelfth mouth), extra-large (16th mouth), and extra-large (25th mouth). Preferably, the surface of the receiving net is processed with a resin.

[0014]

According to the present invention, a handling cylinder 1 is mounted on a shaft in a handling room, a feed chain 2 is provided along a handling opening parallel to the handling cylinder 1, and the handling cylinder 1 is divided into front and rear portions. Is a first cylinder 3, a rear cylinder is a second cylinder 5, and the second cylinder 5 is a first cylinder.
The first handling cylinder 3 and the second handling cylinder 5 are respectively connected to the gearing so as to rotate at a higher speed than the handling cylinder 3, and each of the first handling cylinder 3 and the second handling cylinder 5 has a tooth removal tooth 4.
In the threshing machine in which the teeth 4a and 4b are planted, the planting density of the teeth 4b of the second handling cylinder 5 is set higher than the planting density of the teeth 4a of the first handling cylinder 3, so that the planting of the teeth 4a is performed. The first handling cylinder 3, which has a small installation density and rotates at a low speed, allows the initial handling cylinder load to be reduced as much as possible to make it possible to carry out the shedding process without difficulty.
The second handling cylinder 5 is rotating at a higher speed than the first handling cylinder 3, and the planting density of the teeth 4 b of the second handling cylinder 5 is higher than the planting density of the teeth 4 a of the first handling cylinder 3. In combination with the increase in size, the single grain processing for cutting ears and the shredding of long straw, which could not be completely processed by the first cylinder, can be efficiently performed by the teeth 4b of the second cylinder 5. Can be efficiently performed without lengthening the length of the handling cylinder as a whole, and stuck to the straw culm is reliably removed to prevent the grain from scattering outside the machine can do.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a threshing apparatus.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a developed view showing another example of the receiving network.

FIG. 4 is a longitudinal sectional view showing another example of the handling cylinder.

FIG. 5 is a longitudinal sectional view of still another example of the handling cylinder.

FIG. 6 is a cross-sectional view showing an arrangement of tooth handling.

FIG. 7 is a cross-sectional view of the drum drive device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Handling cylinder 2 Feed chain 3 First handling cylinder 4a, 4b Teeth 5 Second handling cylinder 6 Second handling cylinder shaft 6a Cylindrical shaft 7 Transmission case 12 First handling cylinder shaft 19 Guide ring

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Claims (1)

[Claims] 1. A handling cylinder 1 is mounted on a shaft in a handling room, a feed chain 2 is provided along a handling opening parallel to the handling cylinder 1, and the handling cylinder 1 is divided into front and rear parts to form a front part. The first cylinder 3 is linked to a transmission so that the second cylinder 5 rotates at a higher speed than the first cylinder 3.
In a threshing machine in which toothing teeth 4a and 4b for threshing are implanted in the second handling cylinder 5, respectively, the planting density of the toothing 4b of the second handling cylinder 5 is increased by the implantation of the toothing 4a of the first handling cylinder 3. Threshing machine handling cylinder characterized by being larger than the density.