JPH0316433Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transmission device for a threshing machine that can change the rotational speed of a handling drum in stages according to the type of grain to be threshed, such as rice or wheat.

In general, harvested grains such as rice and wheat differ greatly in shedding properties, sortability, etc. depending on the type. for example,
Compared to rice, wheat has poor shedding properties and has a high culm rigidity, so it breaks easily, and the yield per unit area is low, and it also produces heavy waste, such as grains that have fallen off and are left with only the outer grain. It has an easy nature. For this reason, in order to improve the threshing performance, threshing machines have been equipped with a speed change mechanism in the handling barrel so that the speed can be changed to a high speed side. On the other hand, in the sorting room, in response to the low yield, the area of the oscillating sorting net was made smaller to prevent contaminants such as wheat culms from getting into the product. . In addition, the suction fan's rotational speed was increased to improve dust removal performance in order to discharge heavy debris out of the machine without getting caught in the intake port of the suction fan.

However, in the past, changing the speed of the handling cylinder, changing the speed of the suction fan, and adjusting the screen area of the oscillating sorting net were performed separately, which not only made the switching operations troublesome, but also caused poor sorting due to forgotten operations. This method has the disadvantage that smooth threshing and sorting cannot be carried out, which may result in increased grain loss and grain loss.

The present invention was devised in order to eliminate these drawbacks in view of the above-mentioned actual circumstances, and the present invention is designed to link the speed change mechanism of the handling cylinder to the speed change mechanism of the suction fan or the screen area adjustment mechanism on the oscillating sorting screen side. It is possible to change the speed of the suction fan, adjust the mesh area, or adjust both at the same time by simply changing the speed of the handling cylinder, by connecting or interlocking with both of them. When switching to grains with different properties, it is possible to eliminate the need for troublesome separate switching operations, and also to prevent the occurrence of poor sorting and increase in grain loss due to forgetting operations, and to obtain excellent threshing and sorting performance. The purpose of this invention is to provide a transmission device for a thresher that can be used in a threshing machine.

The structure of the present invention will be explained based on an embodiment shown in the drawings. 1 is a threshing machine main body, 2 is a conveyor for holding a grain culm stock base constituting the threshing machine main body 1, and 3 is a grain culm stock base. A handling room for threshing the grain culms that are held and conveyed by the holding conveyor 2, 4 is a handling drum provided in the handling room 3, 5 is a sorting room provided below the handling room 3, and 6 is a sorting room. The swinging flow plate 5 is provided, 7 is a winnow, 8 is a first helical body, 9 is a second helical body, and 10 is a suction fan, which are constructed in the conventional manner.

Reference numeral 11 denotes a transmission case that transmits power from an engine (not shown) to the handling barrel shaft 4a, and a transmission mechanism 13 that changes the speed of the power from the input shaft 12 is built into the transmission case 11. That is, input shaft 1
2 is transmitted to the transmission main shaft 14 via bevel gears 13, 13a, and a spur gear 14a fixed to the transmission main shaft 14 is always meshed with a spur gear 15a on the driven shaft 15 side. On the other hand, the speed change gear 16 spline-fitted to one end of the handling barrel shaft 4a is changed to the speed change spur gear 15b fixed to the driven shaft 15 by movement of the speed change shifter 18 in the axial direction by rotating the speed change lever 17. or 15c, the handling trunk shaft 4
The rotation speed of a can be changed by changing the speed.
18a is a shifter arm, 18b is a shifter shaft, 18
c is a bullet, and 18d is a hard ball.

On the other hand, a split pulley 19 biased via a bullet 19a is attached to the fan shaft 10a of the suction fan 10, and the split pulley 19 is suspended between the split pulley 19 and a drive pulley 20 for the suction fan 10. A tension pulley 22 is further suspended around the transmission belt 21. The tension pulley 22 is pivotally supported at one end, and the other end of the tension arm 22a is connected to the shift lever 17 via an inner wire 23, and tensioning and loosening of the inner wire 23 occurs when the shift lever 17 is operated to change gears. As a result, the tension arm 22a rotates about the intermediate support shaft 22b,
This changes the tension applied to the transmission belt 21 by the tension arm 22a, and when the speed change lever 17 is operated to the high speed side, the split pulley 19 can be adjusted so that the suction fan 10 also becomes high speed.

24 is an oscillating sorting net provided on the oscillating flow plate 6, and the oscillating sorting net 24 oscillates the material to be handled from the handling chamber 3 and sorts the grains into the helical body 8. It is something that allows it to flow down. A movable oscillating sorting body 26 is disposed between the oscillating sorting net 24 and an oscillating sorting body 25 provided at the sorting start end side of the oscillating sorting net 24. That is, the shaft 26a provided in the movable sorting body 26 is slidably inserted into the elongated holes 6a provided on the left and right sides of the oscillating flow plate 6, and one end of the shaft 26a protruding from the elongated hole 6a is connected to the oscillating flow plate 6. The actuating arms 27, 27 are rotatably supported on the plate 6 via a shaft 27b, and are fitted into elongated holes 27a formed at the other ends thereof. And actuating arm 2
Although the movable sorting body 26 is normally urged via the ammunition 28 to a position where the movable sorting body 26 moves toward the swinging sorting body 25 and the net area of the swinging sorting net 24 becomes large, the inner wire 29 is The operating arm 27 is connected to the gear shift lever 17 through the tension arm 22a.
is rotated in the direction of arrow A against the ammunition 28 by operating the speed change lever 17 to the high speed side, and moves the movable sorting body 26 to the swinging sorting net 24 side, thereby moving the movable sorting body 26 toward the swinging sorting net 24. 24 to reduce its mesh area.

In addition, in the figure, 23a and 29a are outer wires,
23b and 29b are outer stops, 30 is a swing rack, and 31 is a second reduction fan.

Next, the operation of the present invention constructed as described above will be explained. The grain culms carried in the grips by the grain culm stock carrier 2 are threshed in the handling room 3, but the unhandled products are sorted in the sorting room 5, and the first grains are collected as grains. Straw waste and the like are discharged to the outside of the machine by a suction fan 10.

In such a threshing and sorting operation, when switching from rice to wheat, it is necessary to operate the speed change lever 17 to increase the rotational speed of the handling drum 4. in this case,
In this embodiment, when the shift lever 17 is switched from the solid line position to the imaginary line position as shown in FIG. 3, the shift gear 16 meshes with the shift spur gear 15c, and the speed is increased. Moreover, by switching the speed change lever 17 to the high speed side, the inner wire 23,
29 are pulled at the same time to rotate the tension arm 22a and the operating arm 27, respectively.
That is, on the suction fan 10 side, the inner wire 2
3 is pulled, the tension arm 22a rotates in the direction in which the tension pulley 22 applies tension to the transmission belt 21 (in the direction of arrow B in FIG. 2).
The transmission belt 21 becomes tense. For this reason, split pulley 1
9 expands against the bullet 19a and transmits the transmission belt 21.
The suspension diameter of the suction fan 10 becomes smaller, and the suction fan 10
, shift lever 1 without having to switch each time.
It is automatically switched to the high speed side by the operation in step 7.
Even relatively heavy contaminants, such as outer glumes or long culms, which are likely to occur in the case of wheat, can be reliably discharged outside the machine without getting caught in the suction port.

On the other hand, when the operating arm 27 rotates in the direction of arrow A by the above switching operation of the speed change lever 17, the movable sorting body 26 is automatically pulled out to the swinging sorting net 24 side and partially blocks it. . Therefore, the screen area is automatically changed to correspond to grains with a low yield per unit area, such as wheat, and the grains are sorted, and the grains are sorted into the first helix 8 with impurities such as wheat culms being effectively sorted.
This will cause it to leak to the side.

Conversely, when switching from wheat to rice, simply returning the speed change lever 17 to the solid line position slows down the rotation speed of the handling drum 4, and at the same time, the suction fan 10 rotates at a low speed to match the rice. The oscillating sorting net also has a wide net area to match the rice, eliminating the need for separate switching operations and eliminating the need to forget to switch.

In this way, in the above embodiment in which the present invention is implemented, the handling cylinder 4 is adjusted depending on the type of grain to be threshed.
As the rotational speed of the suction fan 10 is changed in stages, the rotational speed of the suction fan 10 is automatically changed and the screen area of the oscillating sorting screen 24 is adjusted simultaneously. Not only is operability improved by eliminating the need for separate switching operations, but also the occurrence of poor sorting and increase in grain loss caused by forgetting to switch can be reliably eliminated, resulting in excellent sorting performance. Can be done.

Further, in the above embodiment, the suction fan 10 and the swinging sorting net 24 are simultaneously switched by changing the speed of the handling cylinder 4. Alternatively, the oscillating sorting net 24 may be switched by changing the speed of the handling cylinder 4.

In summary, the transmission device in the threshing machine of the present invention has a transmission mechanism that changes the rotational speed of the handling drum in stages according to the type of grain to be threshed. Screen area adjustment mechanism,
Alternatively, the speed change mechanism of the suction fan or the mesh of the oscillating sorting net can be connected in conjunction with the speed change mechanism on the suction fan side and the screen area adjustment mechanism on the oscillating sorting net side, and in conjunction with the speed changing operation of the speed changing mechanism on the handling cylinder side. Since the structure is configured to adjust the area, change the speed of the suction fan, and adjust the net area of the oscillating sorting net in a stepwise manner, the grain to be threshed can be divided into rice, rice,
When switching to grains with different properties, such as wheat, simply shift the variable speed mechanism on the handling barrel to a position that matches the type of grain, and you can adjust the rotation speed of the suction fan or adjust the speed of the oscillating sorting net. Area adjustment, or both of these adjustments, can be switched to a constant state at the same time.Therefore, there is no need for troublesome switching operations at multiple locations, and switching operations can be performed at the same time without forgetting operations with a single touch. This has the effect of providing excellent operability and good sorting performance.

[Brief explanation of drawings]

The drawings show an embodiment of the transmission device for a threshing machine according to the present invention, in which Fig. 1 is an overall front view with a portion of the threshing machine cut away, Fig. 2 is an overall rear view of the same, and Fig. 3 is an overall rear view of the threshing machine. The figure is a front view of the handling cylinder side transmission mechanism,
The figure is a plan view of the essential parts of the above, Fig. 5 is a side view of the essential parts of the above, Fig. 6 is a plan view of the suction fan side transmission mechanism, and Fig. 7 is a perspective view of the mesh area adjustment mechanism of the oscillating sorting net. be. 1... Threshing machine main body, 4... Handling cylinder, 10... Suction fan, 17... Speed change lever, 24... Rocking sorting net.

Claims (1)

[Scope of utility model registration request] The speed change mechanism that changes the rotational speed of the handling cylinder in stages according to the type of grain to be threshed is a speed change mechanism on the suction fan side, a mesh area adjustment mechanism on the oscillating sorting net side, or a speed change mechanism on the suction fan side. changing the speed of the suction fan in conjunction with the mesh area adjustment mechanism on the oscillating sorting net side and in conjunction with the speed changing operation of the handling cylinder side speed changing mechanism;
Alternatively, a transmission device for a threshing machine characterized in that it is configured to adjust the net area of the oscillating sorting net, or to change the speed of the suction fan and adjust the net area of the oscillating sorting net in a stepwise manner.