JPH0446522Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an automatic adjustment device for a chaf sieve in the threshing section of a combine harvester, which can automatically adjust the chaf sieve that oscillates and sorts the material that falls from the threshing drum.

[Conventional technology]

Conventionally, combine harvesters were constructed by installing a swinging sorting body with a chaff sheave consisting of a large number of fins whose inclination can be changed freely below a handling trunk inside a machine body with a corresponding feed chain and trapping rods installed on the outside. In the threshing department, the Japanese Patent Publication No. 53-33494 and the
As seen in Japanese Patent No. 55-42542, it is known that the inclination of the fins is automatically changed according to the amount of grain culms to be transported, but the change in the inclination of the fins on one side causes the inclination of the fins on the other side to change. No changes are known that have been made to occur later.

[Problem that the invention aims to solve]

The present invention attempts to automatically change the inclination of each fin of the chaff sheave in conjunction with the vertical movement of the culm. When the amount of grain harvested changes or the machine turns on the headland side of the field, each fin of the chaff sheave is tilted well to adapt to the changing amount of threshing in the threshing section. The present invention is to provide a simple structure that can be modified to perform sorting well, and that can be operated reliably and favorably.

[Means for solving problems]

Therefore, in the present invention, the tip side of a piston rod fixed to a piston fitted in a cylinder is interlocked with the middle part of the clamping culm, which moves up and down under pressure from a spring, so that it moves slightly slowly in the backward movement direction. The other end of the piston rod is interlocked with the other end of a push rod whose lower end can change the inclination of each fin of the chaff sheave.

[Function] Therefore, the culm moves up and down in accordance with the amount of grain culm that is being threshed while being conveyed and is held between the feed chain and the culm, and is linked to the vertical movement. By moving the piston rod up and down, the inclination angle of the fin can be automatically adjusted via the push-pull rod, and as the amount of grain culm decreases, the pinching culm moves back toward the feed chain side. In this case, the return movement of the piston rod becomes slightly slower and the inclination angle of the fins gradually changes, making it possible to better adjust the sorting condition by the chaff sheave.

〔Example〕

Next, the embodiment shown in the drawings will be described.

FIG. 2 shows a side view of the combine, in which the threshing section A is mounted on the machine body supported by both crawlers 10.
A reaping section B is connected in front of the threshing section A, and a feed chain 1 and a culm 2 are installed above and below the outer side of the threshing section A, and a feed chain 1 and a culm 2 are installed between them so that grain culm can be supplied from the culm B. The culm 2 is divided in the longitudinal direction, and each connected portion is pressed upward by a compression spring 6 from a lower culm stand 11 so as to be vertically movable. A crimp net 13 is stretched below the handling cylinder 3, and a downward dust inlet 14 is formed at the terminal end of the crimp net 13, and from the bottom of the handling chamber 12 to the dust exhaust side,
A swinging sorting body 5 equipped with a chaff sheave 4, a grain sieve 15, a sieve wire 16, etc. is extended, and the upper part of each parallel fin 4a constituting the chaff sheave 4 is pivoted on a support shaft 17, and each fin 4a
The pin 18 at the bottom of the fins 4a is pivotally supported on an interlocking rod 19, and when the interlocking rod 19 is moved, the inclination of each fin 4a can be changed at the same time. No. 1 spiral conveyor 21, 2
A number spiral conveyor 22 is arranged respectively and the construction is similar to the conventional structure.

A trapping stand 1 located below the middle part of the trapping culm 2
1, a cylinder 7 in the vertical direction is fixed with a mounting bracket 23, and a piston 24 is slidably fitted into the cylinder 7, and an intermediate portion of a piston rod 8 is inserted and fixed therein, and extends above the cylinder 7. The upper tip side of the piston rod 8 is connected to the clamping culm 2 between both springs 6, 6, and the fluid flows smoothly above the orifice hole 25 formed in the piston 24 when the piston 24 descends, but when the piston 24 descends, the fluid flows upward. A check valve type valve 26 that acts to restrict the flow of fluid is installed when the cylinder 7 is moved. The lower end 8a of the piston rod 8 is connected to the upper end 9a of the push-pull rod 9.
It is installed and configured so that the two can collide with each other.

A long interlocking rod 27 and an arm 28 are integrally extended forward and upward from the support shaft 17 of the fin 4a which is one end side of the chaff sheave 4 in the swing sorting body 5, and a long interlocking rod 27 and an arm 28 are integrally extended between the arm 28 and the support piece 29. A tension spring 30 is connected to the guide 31 fixed to the upper side of the interlocking rod 27.
A holder 32 that supports the lower part of the push-pull rod 9 is slidably fitted so that it can move horizontally, and the lower end 9b of the push-pull rod 9 that projects downward from the holder 32 comes into contact with the upper surface of the interlocking rod 27. The holder 32 and the support piece 2
A tension spring 33 is connected between the tension spring 33 and the wire 34 connected to the holder 32 so as to extend in the opposite direction of the tension spring 33.
The wire 34 extending from the lower wire receiver 38 is connected to an adjustment lever 37 that extends to the 5 side and is rotatable about a fulcrum 36 near the driver's seat.
Constructed by connecting the ends of the

Therefore, during combine harvester work, the reaping section B
When the culm side of the grain culm harvested by the grain culm is supplied to the feed chain 1 of the threshing section A, the culm side is conveyed while being pinched by the feed chain 1 and the culm 2, threshed by the handling drum 3, and dropped. The objects to be sorted are sorted by the swinging sorter 5 and the chaff sieve 4 in the same manner as in the conventional method.

In the case of rice, as shown in FIGS. 1 and 6, if the adjustment lever 37 is rotated downward in the direction of arrow A, the wire 34 is pulled by the tension spring 33 to the extent that the wire 34 is loosened, and the holder 32 is is moved to the spindle 17 side, and in this state, when reaping and threshing is carried out as usual, the fifth grain culm
As shown in the figure, when the clamping culm 2 is pushed down and the piston 24 is lowered while fluid flows into the orifice hole 25 and the piston rod 8 is pushed down, the push-pull rod 9 is pushed down by the piston rod 8 and its lower end is pushed down. 9b pushes down the interlocking rod 27, and as the interlocking rod 27 rotates downward, each fin 4
The inclination of the fins 4a is changed to a steeper one, and in this state, the objects to be sorted are properly leaked from between the fins 4a, and sorting can be performed normally.

In this state, if the movement of the machine is stopped in the field or if the machine turns on the headland side of the field, the harvesting part B will not be able to reap and the amount of grain remaining to be transported by the feed chain 1 will be small. However, as the layer on the culm side of the grain culm becomes thinner, the piston rod 8 rises due to the force of the culm 2 rising under the pressure of the spring 6, and the push rod 9 As the lower end portion 9b rises, the interlocking rod 27 is rotated upward by the tension spring 30, and the inclination of each fin 4a is changed to become gentler as shown in FIG. As a result, the material to be sorted is less likely to leak from between the fins 4a, and the material to be sorted that is to be threshed with little remaining can be effectively sorted.

In that case, when the piston rod 8 is raised, the valve 26 acts and the flow of fluid from the orifice hole 25 is slowed down, and the inclination of each fin 4a is gradually changed, so that the material to be sorted is removed from the chaff sieve. 4. This means that you can respond to changes up to the point where it falls on top of you.

In addition, in the case of wheat, if the adjustment lever 37 is rotated upward in the direction of the arrow B as shown in FIG. Therefore, the lower end 9b of the push-pull rod 9 contacts and operates the interlocking rod 27, which rotates less, changing the inclination of the fin 4a to adapt to wheat. will be held.

[Effect of idea]

In this way, the present invention can automatically change the inclination of each fin 4a of the chaff sheave 4 in conjunction with the vertical movement of the sheave culm 2. When the amount of culms to be harvested changes or the machine turns on the headland side of the field, each fin 4a is adapted to suit the amount of remaining grain culms to be conveyed in the threshing section A. In addition, when the amount of grain culms decreases and the grain culm 2 moves back toward the feed chain 1 side, the piston rod 8 Since the backward movement is slightly slower and the inclination angle of the fins 4a can be gradually changed, the sorting condition by the chaff sheave 4 can be automatically adjusted in a good manner, and it is preferable to have a simple structure that works reliably and well. It has the advantage of being able to be implemented in many ways.

[Brief explanation of the drawing]

Figure 1 is a side view of the main parts of an embodiment of the present invention;
Figure 2 is a side view of the combine harvester, Figure 3 is a side sectional view of part of the threshing section, Figure 4 is a sectional view of part of Figure 1, Figure 5 is an explanatory diagram of the operation of Figure 4, 6 and 7 are operation explanatory diagrams showing a part of FIG. 1. 1... feed chain, 2... culm, 3...
Handling trunk, 4a... Fin, 4... Chaff sheave, 5
... Oscillating sorter, 6... Spring, 7... Cylinder, 8... Piston rod, 9... Push pull rod, 24... Piston.

Claims (1)

[Scope of utility model registration request] A swing sorting body 5 having a chaff sheave 4 consisting of a large number of fins 4a whose inclination can be changed is installed below a handling trunk 3 in a machine body in which a corresponding feed chain 1 and a clamping rod 2 are installed on the outside. In the threshing section of a combine harvester, a piston rod 8 is fixed to a piston 24 fitted in a cylinder 7 so as to move slightly slowly in the backward movement direction, at a midway portion of the pinning rod 2 which moves up and down under pressure from a spring 6.
The other end of the piston rod 8 is interlocked with the other end of a push-pull rod 9 whose lower end can change the inclination of each fin 4a of the chaff sheave 4. This is an automatic chaff sheave adjustment device.