JPH119066A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester designed to obviate such unfavorablenesses that stems slip off when a threshing feed chain relays them from a pre-treatment section, and/or they are not fully threshed due to the disturbance of their carriage posture. SOLUTION: This combine harvester has such a scheme that a threshing feed chain 16 for carrying stems relayed from a pre-treatment section 2 along a threshing chamber is set up on the side face of a threshing section 3; wherein the feed chain 16 is divided into a front feed chain 23 and a rear feed chain 24, and the former is fed with mechanical power from the pre-treatment section 2 side, while the latter from the threshing section 3 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of combine harvesters, and more particularly to a threshing feed chain for conveying stems and stems inherited from a pretreatment section along a threshing section.

[0002]

2. Description of the Related Art Generally, in this type of combine,
The stem and culm cut off in the pre-processing unit are inherited by a threshing feed chain disposed along the side of the threshing unit, and are configured to thresh grains from the stem and culm in a transport path of the threshing feed chain. .

[0003]

By the way, in some combine, the operating speed of the pre-processing unit is linked to the vehicle speed, but the threshing unit is required to exhibit stable threshing performance (including sorting performance). Since it is operated at a constant speed (a speed corresponding to the engine speed), there is a difference between the stalk transport speed of the pretreatment unit and the stalk transport speed of the threshing feed chain. When inheriting, there was a possibility that stems and stems may fall off, or the transport posture may be disturbed, resulting in unhandled items.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems in view of the above-mentioned circumstances, and inherits and inherits stems and culms that have been cut off by a pre-processing unit. In a combine provided with a threshing feed chain that conveys a stem culm along a threshing unit, the threshing feed chain is divided into a front feed chain and a rear feed chain, and the conveyance speed of the front feed chain is set to a vehicle speed or a pretreatment. While the speed is linked to the operating speed, the transport speed of the rear feed chain is linked to the engine speed or the operating speed of the threshing unit. In other words, since the front feed chain inherits the stem and culm at a speed corresponding to the pretreatment operation speed, there is no inconvenience that the stem and stem fall off at the time of inheritance, or the transport posture is disturbed and unhandled, and in the threshing transport range, Since the rear feed chain conveys the stems and stems at a speed corresponding to the operation speed of the threshing unit, good threshing performance can be maintained. In addition, the transport start end position of the rear feed chain is located forward of the handling room of the threshing unit. In other words, since the rear feed chain handles all the transport of the stem and culm in the threshing transport range, it is possible to maintain good threshing performance, and the stem and culm of the rear feed chain are subjected to threshing action. Since it is performed before, there is no inconvenience that the stem is subjected to threshing action at the time of inheritance and disturbs the transport posture. In addition, the terminal end sprocket of the front feed chain and the start end sprocket of the rear feed chain are supported on the same axis. In other words, since the stalk transport range of each feed chain can be continued in a slightly overlapping state, as in the case where the stalk transport range of each feed chain is separated, there is no inconvenience that the stem and stem fall off. In addition, the inconvenience in which the conveying posture of the stem and culm is disturbed based on the speed difference between the feed chains, as in the case where the stalk and culm conveying ranges of the respective feed chains are overlapped in a wide range, can be solved.

[0005]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a combine, and the combine 1 is a pre-processing unit 2 for cutting stem culms, a threshing unit 3 for threshing grains from cut stems and culling, and selecting kernels. , A grain tank 4 in which is stored
The post-processing unit 5 for discharging the threshed culms, the operating unit 6 in which various operating tools are disposed, the running unit 7 including a pair of right and left crawler running bodies, and the like are configured. All are the same as before.

The pre-processing unit 2 includes a divider 8 for weeding uncut stems, a raising device 9 for raising the weeded stems, a cutting blade 10 for cutting the root position of the stems, and a cutting stem. A pretreatment transport device 12 for nipping and transporting the culm to a handling depth transport body 11 described below.
However, the raising device 9, the cutting blade 10, the handling depth transport body 11 and the pre-processing transport device 12 pass through the traveling main transmission mechanism 13 (hydrostatic stepless transmission unit HST). Since engine power is supplied, cutting and transport of stems and stems are performed at a speed corresponding to the vehicle speed.

[0007] In the handling depth carrier 11, a stock carrier chain 14 for carrying the stem side of the stem and culm and a head carrier 15 for carrying the head side of the stem and culm are provided side by side. The entire handling depth transport body 11 is forcibly rotated in the vertical direction with the transport end side as a fulcrum, based on driving of a handling depth motor (not shown). That is, the handling depth carrier 11 is
In clamping the stem / culm at the stem / culm transfer end position of the pre-processing unit 2, the holding position can be moved up and down based on rotation about the transfer end side as a fulcrum. Threshing feed chain 16 that inherits stem and culm at the end
The handle depth in the threshing unit 3 can be adjusted by changing the stem / culm holding position.

On the other hand, the threshing unit 3 comprises a handling room 18 in which a handling drum 17 is provided and a sorting room 19 in which a sorting device (not shown) is provided. The handling room 18 receives the tip side of the stem and culm conveyed by the threshing feed chain 16 and performs threshing on the tip side of the received stem and culm by the rotating force of the handling cylinder 17. , The engine power is supplied without passing through the traveling main transmission mechanism 13, so that threshing and sorting are performed at a speed corresponding to the engine speed.

The threshing feed chain 16 includes a threshing unit 3.
The stems, which are arranged in the front and rear direction on the outer side surface of the stalk, and which are conveyed to the terminal end of the handling depth conveying body 11 are sandwiched between the entrance guide rail 20 and the stems which have been inherited. The culm is conveyed to the beginning of the culm feed chain 22 while being clamped between the clamping rails 21. The threshing feed chain 16 of the present invention is divided into a front feed chain 23 and a rear feed chain 24. I have.

The front feed chain 23 is suspended between a driven sprocket 25 at a transport start end position and a drive sprocket 26 at a transport end position.
Power is supplied to the driving sprocket shaft 27 that integrally supports the motor 6 from the preprocessing unit 2 side. That is, while extending the drive shaft 28 of the handling depth conveying body 11, the distal end of the drive shaft 28 is linked to the sprocket shaft 27 via the bevel gear mechanism 29, and as a result, the front feed chain 23 In order to transport the stems and stems at substantially the same speed (linked to the vehicle speed or the pre-processing operation speed) as the handling depth transport body 11, the front feed chain 23
At the time of inheriting the stems and stems from No. 1, it is possible to prevent the stems and stems from falling off and disturbing the conveying posture as much as possible.

On the other hand, the rear feed chain 24 is hung around a driven sprocket 30 at a transfer start position, a driven sprocket 31 at a transfer end position, and a drive sprocket 32 below the transfer start position.
, Power is supplied from the threshing unit 3 side. That is, the power supplied to the Karamin shaft 33 of the threshing unit 3 is extracted using the belt transmission mechanism 34, and the extracted power is supplied to the drive sprocket 32 via the gear case 35. As a result, the rear feed chain 24 Transports the stems and stems at a constant speed according to the operating speed of the threshing unit 3 (linked to the engine speed or the operating speed of the threshing unit), so that stable threshing performance can be exhibited regardless of vehicle speed fluctuations. It has become.

By the way, the trailing end sprocket 30 of the rear feed chain 24 is connected to the front feed chain 2.
3 is freely rotatably supported by the drive sprocket shaft 27. In other words, since the driving sprocket 26, which is the terminal sprocket of the front feed chain 23, and the start driven sprocket 30 of the rear feed chain 24 are supported on the same axis, the stems of the feed chains 23, 24 The culm conveyance range will be continued in a slightly overlapping state, and as a result, there is no inconvenience that the stem culm falls off when the stem culm is passed from the front feed chain 23 to the rear feed chain 24. Chains 23, 24
It is also possible to avoid the inconvenience that the conveying posture of the stem / culm is disturbed based on the speed difference of the stem.

The feed start position of the rear feed chain 24 (threshing feed chain division position) is set so as to be on the front side of the handling room 18 of the threshing unit 3. As a result, the rear feed chain 24, which is linked to the engine speed, handles all the stalk culm conveyance in the threshing conveyance range (the range where the stalks are subjected to the threshing action of the handling cylinder 17), so that stable threshing performance can be exhibited. And the rear feed chain 24
Since the stalk culm inherits the stalk culm from the front feed chain 23 before the stalk culm undergoes the threshing action, it is possible to avoid the disadvantage that the stalk culm is subjected to the threshing action at the time of inheritance and disturbs the transport posture.

Reference numerals 36 and 37 denote a pair of front and rear tension arms which are swingably supported by a gear case 35 (output shaft 35a). The front tension arm 36 has a front end tension roller 36a and a front feed chain 23.
While the rear tension arm 37 presses the rear feed chain 24 with the tension roller 37a at the tip, the pressing force of both tension rollers 36a and 37a is given from a single pulling elastic machine 38. It has become. That is, since the base end portion of the rear tension arm 37 is extended and the extension portion is connected to the intermediate portion of the front tension arm 36 by the tension arm 37, a single tension arm 3 is provided.
7, the tension arms 36, 37 can be urged in opposite directions, and in this case, the urging forces of the tension arms 36, 37 cannot be balanced.
When an overload acts on one of the feed chains 23, 24, the load can be released to the other feed chains 23, 24.

In the apparatus configured as described above, a threshing feed chain 16 for conveying the stems and stems inherited from the pretreatment section 2 along the handling chamber 18 is disposed on the side surface of the threshing section 3. The threshing feed chain 16 is divided into a front feed chain 23 and a rear feed chain 24, and power is supplied to the front feed chain 23 from the pre-processing unit 2 side. In order to supply power from the threshing unit 3 side, even if the conveyance speed of the pre-processing unit 2 is linked to the vehicle speed, the transfer of stems and stems from the pre-processing unit 2 to the front feed chain 23 can be performed smoothly, As a result, stems and stems may fall off during inheritance,
It is possible to solve the problem that the transfer posture is disturbed and the unhandled state occurs.

Moreover, in the transport range where the stem and culm are subjected to the threshing action, the rear feed chain 24 conveys the stem and culm at a speed corresponding to the operation of the threshing unit 3, so that stable threshing performance can be exhibited.

Further, since the transfer start end position of the rear feed chain 24 is set to the front side of the handling chamber 18, the rear feed chain 24 is responsible for all the stem and stem transfer in the threshing transfer range. The rear feed chain 24 is
Since the stem culm inherits the stem culm before being subjected to the threshing action, it is possible to avoid the disadvantage that the stem culm is subjected to the threshing action at the time of inheritance and disturbs the transport posture.

The end sprocket (drive sprocket 26) of the front feed chain 23 and the start sprocket (start driven sprocket 30) of the rear feed chain 24 are aligned on the same axis (drive sprocket shaft 2).
7), each feed chain 23, 24
Can be continued in a slightly overlapping state, so that the front feed chain 2
In addition to the inconvenience that the stem and stem fall off when the stem and stem are passed from 3 to the rear feed chain 24, the inconvenience that the conveying posture of the stem and stem is disturbed based on the speed difference between the feed chains 23 and 24 is also avoided. be able to.

Further, since a pair of tension arms 36 and 37 for pressing the feed chains 23 and 24 are urged by a single pulling elastic machine 37, the number of parts can be reduced and the structure can be simplified. Instead, the biasing forces of the tension arms 36, 37 can be automatically balanced, and when one of the feed chains 23, 24 is overloaded, the load is reduced to the other feed chain 23, 24. 24 has the advantage of being able to escape.

The present invention is, of course, not limited to the above-described embodiment. For example, the tension mechanism for pressing each of the hood chains 23 and 24 is similar to that of the second embodiment shown in FIG. You may comprise. That is, the tension mechanism of the second embodiment has a tension roller 39
a, 40a, a pair of tension rods 39, 40
Are fitted to both ends of a guide cylinder 41 fixedly mounted on the gear case 35 so as to be able to protrude and retract, and a single compression for urging the guide cylinder 41 to press the base end surfaces of the tension rods 39 and 40 in the opposite direction. It is configured with a bullet 42 inside.

[Brief description of the drawings]

FIG. 1 is a perspective view of a combine.

FIG. 2 is a side view of a threshing unit.

FIG. 3 is a plan view of the same.

FIG. 4 is a transmission circuit diagram showing a transmission path of a threshing feed chain.

FIG. 5 is a graph showing an operation.

FIG. 6 is a side view of a threshing unit showing a second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Combine 2 Pre-processing part 3 Threshing part 11 Handling depth conveyance body 16 Threshing feed chain 18 Handling room 23 Front feed chain 24 Rear feed chain 26 Drive sprocket (terminal sprocket of the front feed chain) 27 Drive sprocket shaft 30 Follower sprocket (Start sprocket on rear feed chain)

Claims (3)

[Claims] 1. Inheriting the stem and culm cut off in the pre-processing unit,
In a combine provided with a threshing feed chain that conveys the inherited stem and stem along a threshing unit, the threshing feed chain is divided into a front feed chain and a rear feed chain, and the conveyance speed of the front feed chain is set to a vehicle speed or A combine that links the transport speed of the rear feed chain with the engine speed or the threshing unit operating speed, while linking it with the preprocessing operating speed. 2. The combine according to claim 1, wherein the transport start end position of the rear feed chain is located forward of the handling room of the threshing unit. 3. The combine according to claim 1, wherein the end sprocket of the front feed chain and the start sprocket of the rear feed chain are coaxially supported.