JPH1175508A - Threshing part structure for threshing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the structure of a threshing part capable of hardly producing cut straws, readily recovering grain from waste straws and threshing. SOLUTION: A threshing cylinder 3 comprises a first threshing cylinder 3A and a second threshing cylinder 3B which are longitudinally divided. The outer diameter D2 of the second threshing cylinder 3B is formed smaller than the outer diameter D1 of the first threshing cylinder 3A. Length L2 of second threshing teeth 22 attached to the second threshing cylinder 3B projected from the outer peripheral face of the threshing cylinder is made larger than length L1 of first threshing teeth 21 attached to the first threshing cylinder 3A projected from the outer peripheral face of the threshing cylinder. The first threshing cylinder 3A and the second threshing cylinder 3B are driven in a state of the peripheral velocity of the second threshing cylinder 3B higher than the peripheral velocity of the first threshing cylinder 3A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing unit structure of a threshing machine in which a cut culm is supplied to a handling room by a threshing feed chain and threshed by a rotating handling drum.

[0002]

2. Description of the Related Art In the above-mentioned threshing machine, conventionally, as shown in, for example, Japanese Patent Application Laid-Open No. 3-127907, a handling cylinder is formed with a first handling cylinder forming a front end portion thereof and a rear handling portion. In addition, the first handling cylinder is constituted by a divided second handling cylinder, and the first and second handling cylinders are driven so that the second handling cylinder rotates at a higher speed than the first handling cylinder. There was something. That is, on the front end side of the handling room, threshing is performed while suppressing the occurrence of broken straw by the first handling cylinder that rotates at a lower speed than the second handling cylinder, and at the rear end side of the handling room, the speed is higher than that of the first handling cylinder. By the rotating second handling cylinder, threshing products such as single-grained grains can be quickly leaked from the receiving net or dust can be quickly discharged from the handling room to quickly process threshing products. There was something possible.

[0003]

As described above, the conventional handling cylinder which divides the handling cylinder into a first handling cylinder and a second handling cylinder in the front and rear direction and employs a divided handling cylinder which drives the rear second handling cylinder at a high speed. The threshing technique is to equalize the space between the peripheral surface of the handling cylinder and the receiving net on the front end side of the handling room where the first handling cylinder is located, and the spacing on the rear end side where the second handling cylinder is located. there were. For this reason, if the first handling cylinder and the receiving net are configured to thresh while pressing the cereal stalk so that they are difficult to move on the front end side of the handling room, the second handling cylinder and the receiving net are also provided on the rear end side of the handling room. And processing while holding the grain stalk so that it is difficult to move, it becomes difficult to unravel the entanglement of threshing waste straw, and it is difficult to collect threshing processed products such as monogranulated grains entering the inside of threshing waste straw. Had become. Conversely, if the second handling cylinder and the receiving net are configured so that the grain culm is not pressed so much on the rear end side of the handling room as to easily move the culm, the first handling can also be performed on the front end side of the handling room. The body and the receiving net perform threshing without holding down the cereal culm, so that the cereal culm becomes easy to move, and the straw is easily generated in spite of the low speed driving of the first handling cylinder. An object of the present invention is to provide a threshing unit structure of a threshing machine capable of threshing while effectively suppressing the occurrence of broken straw and the loss of grain.

[0004]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] In a threshing unit structure of a threshing machine configured to supply a harvested grain culm to a handling chamber by a threshing feed chain and to perform threshing by a rotating handling cylinder, a front portion of the handling cylinder is formed. The first handling cylinder and the second handling cylinder that forms a rear side portion and are separated from the first handling cylinder constitute the handling cylinder, and the outer diameter of the second handling cylinder is set to the first diameter.
The outer diameter of the handling cylinder is formed smaller than the outer diameter of the first handling tooth of the first handling cylinder. A drive mechanism for driving the first and second handle cylinders in a state in which the length of the second handle cylinder is greater than the length of protrusion from the surface and the peripheral speed of the second handle cylinder is higher than the peripheral speed of the first handle cylinder. .

[Operation] At the front end side of the handling room, the first handling cylinder is driven at a low speed by the drive mechanism to perform threshing while preventing the occurrence of breakage, and at the rear end side, the second handling cylinder is driven by the drive mechanism. The processing is performed while the thresh-treated material such as kernels, which are driven at a high speed, quickly leaks from the receiving net, or the dust quickly exits from the handling room. Further, due to the difference in the protruding length of the first tooth and the second tooth, the distance between the handle cylinder and the receiving net at the front end of the handling chamber is made smaller than that at the rear end, and at the front end of the handling chamber. , The threshing process can be performed while the first handling cylinder and the receiving net hold down the culm and make it hard to move,
On the rear end side of the handling room, the second handling cylinder and the receiving net do not press the grain stalk very much, and the grains can be easily unwound so as to easily come out of the straw.

[Effect] At the front end side of the handling room, threshing is effectively performed on both sides of threshing while the first handling cylinder is rotating at a low speed and threshing while the culm is hard to move. The threshing process can be performed while suppressing the grain size. At the rear end of the handling room, the second handling drum rotates at a high speed and the grain is processed while the grain stalks are easily unraveled. It is taken out well and quickly leaked from the receiving net, and the dust is quickly discharged from the handling room.There is little dust and good quality, and the grain is mixed and discharged into the threshing straw. Threshing can be obtained with little loss.

The structure, operation and effect of the invention according to claim 2 are as follows.

[Structure] In the structure according to the first aspect of the present invention, the front end of the second handling cylinder is inserted into the rear end of the first handling cylinder.

[Operation] By the above-mentioned entry of the first handling cylinder into the second handling cylinder, threshing can be performed while it is difficult for straw chips and grains to enter the inside from the gap between the two handling cylinders.

[Effect] In spite of the difference between the outer diameter and the peripheral speed between the first and second handling cylinders, it is possible to prevent the threshing material from entering between the handling cylinders. Grain loss due to entry of material can be suppressed, and failures are less likely to occur.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a threshing feed chain 1 supplies the front side of a harvested grain culm to a handling room 2 and threshing by a handling drum 3 which rotates around a shaft core 3a facing in the longitudinal direction of the machine. The threshing unit is configured to process the threshing waste straw from the handling room 2 by the threshing feed chain 1 to the rear of the machine body and discharge the threshing waste chain to the rear of the threshing machine body by the waste straw transport chain 4. A swingable swinging sorting device 7 for selecting a specific gravity while transporting the processed material dropped and supplied from the receiving net 5 and the dust outlet 6 of the handling room 2 to the rear side of the machine body, and a front end of the swinging sorting device 7 The processing material from the threshing unit is separated into grains and dust by a sorting wind supplied by Karino 8 located below the side, and the dust is discharged together with the sorting wind into an outlet 9 at the rear of the aircraft.
The sorting unit is configured to discharge the paper to the rear of the fuselage or to be sucked by the dust discharge fan 10 and discharged from the dust outlet 11 to the rear of the fuselage. A first screw conveyor 12 for conveying the first processed material from the swing sorting device 7 to the outside of the machine laterally, and a machine laterally conveying the second processed material from the swing sorting device 7 to the lateral outside of the machine. No. 2 screw conveyor 13 is provided at the bottom of the sorting unit, and the processed material from the No. 2 screw conveyor 13 is returned to the top of the starting end of the sorting unit by a reduction device 14 comprising a screw conveyor located outside the threshing machine. It is configured to be returned to the starting end side of the swinging sorting device 7 for re-sorting by discharging it to the inside of the machine by discharging, thereby forming a threshing machine for a combine.

The threshing unit is constructed in detail as shown in FIG. The handling cylinder 3 has a first part forming a front part thereof.
The handle cylinder 3A and the rear portion of the handle cylinder 3 are formed and the first
The handle cylinder 3A is composed of two handle cylinders, a second handle cylinder 3B divided into separate parts. That is, the first handling cylinder 3
A is provided with a tapered straightening portion having a tapered front shape on the front end side, and a cylindrical threshing portion on the rear end side, and toothed teeth 20 on an outer peripheral surface side of the combing portion, and an outer peripheral surface of the threshing portion. The plurality of first handling teeth 2 arranged on the side in the circumferential direction and the axial direction of the first handling cylinder 3A
1 are provided. On the outer peripheral surface side of the second handling cylinder 3B,
A plurality of second lines arranged in the circumferential direction and the axial direction of the second handling cylinder 3B.
The teeth 22 are provided. Then, of the rotating shaft 23 that supports the first handle cylinder 3A in a state of being integrally rotated therewith, a shaft portion protruding rearward from the first handle cylinder 3A rotates the second handle cylinder 3B integrally therewith. The first handling cylinder 3A and the second handling cylinder 3 are arranged so that the rotating shaft portion and the rotating cylinder shaft 24 are double axes in a state in which the rotating shaft portion 24 is rotatably fitted inside the rotating cylinder shaft 24 to be supported.
B is combined with B to create the handling cylinder 3.

The outer diameter D2 of the second handling cylinder 3B is changed to the first handling cylinder 3A.
The length L2 of the threshing section provided with the first handling teeth 21 is smaller than the outer diameter D1 of the threshing section, and the length L2 of each of the second handling teeth 22 of the second handling cylinder 3B protruding from the handling cylinder outer peripheral surface is determined by the first handling. Each first of the trunk 3A
The length of the teeth 21 protruding from the outer peripheral surface of the handling cylinder is larger than the length L1. That is, the working surface of the receiving net 5 facing the handling cylinder 3 is made parallel or substantially parallel to the rotation axis 3a of the handling cylinder 3 over the entire surface, and the tip of the first handling tooth 21 is also handled in the second handling manner. The distal end of the tooth 22 also reaches the vicinity of the receiving net 5 in the same manner, so that the two handling teeth 21 and 22 operate as predetermined, and the distance S1 between the handling cylinder 3 and the receiving net 5 on the front end side of the handling chamber 2 is later. The distance between the handling cylinder 3 and the receiving net 5 is formed to be smaller than the distance S2 between the handling cylinder 3 and the receiving net 5 on the end side.

A handle that rotates about a shaft center parallel or substantially parallel to the rotation axis 3a of the handle drum 3 in conjunction with a drive shaft 25 that is linked to an engine (not shown) via a bevel gear mechanism 26. A drum drive shaft 27, a front end side of the handle drum drive shaft 27 and a first
A first belt transmission device 28 that transmits the rotating power of the handling cylinder drive shaft 27 to the rotation shaft 23 by a transmission belt 28a wound around the front end side of the rotation shaft 23 of the handling cylinder 3A;
The rotating power of the handle drum drive shaft 27 is rotated by the transmission belt 29a wound around the rear end of the handle drum drive shaft 27 and the rear end of the rotary cylinder shaft 24 of the second handle drum 3B.
The drive mechanism 30 that drives the first handling cylinder 3A and the second handling cylinder 3B is configured by each of the second belt transmissions 29 that transmits the driving force to the second belt transmission device 4. The magnitude relation of the transmission ratio between the first belt transmission 28 and the second belt transmission 29 is set such that the rotation speed of the rotary cylinder shaft 24 is higher than the rotation speed of the rotation shaft 23. As a result, the driving mechanism 30
The first handling cylinder 3A and the second handling cylinder 3B are driven in a state where the peripheral speed of the handling cylinder 3B is higher than the peripheral speed of the first handling cylinder 3A.

That is, the threshing unit performs the threshing process as follows as the spike side of the cereal stem is supplied to the handling room 2 by the threshing feed chain 1. That is, on the front end side of the handling room 2, the first handling cylinder 3 </ b> A and the receiving net 5 are located at a small interval S between them.
The first handling cylinder 3A driven at a low speed by the drive mechanism 30 while holding the cereal stalk tightly by 1 to make it difficult to move.
Threshing is carried out so that cutting straw is less likely to occur. On the rear end side of the handling room 2, the second handling cylinder 3 </ b> B and the receiving net 5 are driven at high speed by the drive mechanism 30 while being easily moved by the large spacing S <b> 2 without pressing the grain stalk very much. Dust is quickly transferred to the handling chamber 2 such that threshing products such as grains are rapidly leaked from the receiving net 5 by the handling cylinder 3B.
Process to go out.

[Another Embodiment] FIG. 3 shows a handling cylinder 3 having another embodiment. Only the portion where the first handle cylinder 3A and the second handle cylinder 3B are connected differs from the handle cylinder 3 shown in FIG. 2 and has the following configuration. A flange 3c for closing the gap between the front end of the second handling cylinder 3B and the inner peripheral surface of the first handling cylinder 3A while allowing the front end 3b of the second handling cylinder 3B to enter the rear end of the first handling cylinder 3A. Is provided on the front end 3b. That is, the grains and the broken straw are the first handling cylinder 3
The threshing process is performed while suppressing entry into both handling cylinders 3A and 3B from the gap between A and the second handling cylinder 3B.

[Brief description of the drawings]

FIG. 1 is a sectional view of the entire threshing machine.

FIG. 2 is a schematic diagram of a handling cylinder and a driving mechanism.

FIG. 3 is a schematic view of a handling cylinder provided with another embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 threshing feed chain 2 handling room 3 handling cylinder 3A first handling cylinder 3B second handling cylinder 21 first handling tooth 22 second handling tooth 30 drive mechanism D1 outer diameter of first handling cylinder D2 outer diameter of second handling cylinder L1 Projection length of first tooth handling L2 Projection length of second tooth handling

Claims (2)

[Claims] 1. A threshing unit structure of a threshing machine configured to supply a harvested culm to a handling chamber by a threshing feed chain and thresh by a rotating handling drum, wherein a front portion of the handling drum is formed. A first handling cylinder, and a second handling cylinder that forms a rear portion and is separated from the first handling cylinder, and constitutes the handling cylinder, and the outer diameter of the second handling cylinder is set to the first diameter. The outer diameter of the handling cylinder is formed smaller than the outer diameter of the first handling tooth of the first handling cylinder. A drive mechanism that drives the first and second handling cylinders in a state where the peripheral speed of the second handling cylinder is higher than the peripheral speed of the first handling cylinder, the length being greater than the protruding length from the surface. Threshing unit structure of threshing machine. 2. A threshing unit structure for a threshing machine according to claim 1, wherein a front end of said second handling cylinder is inserted into a rear end of said first handling cylinder.