JPH0424004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, when a threshing machine with a swinging sorting device is mounted on the base of a combine harvester or a harvester, the entire machine body vibrates violently due to the swinging action of the swinging sorter, which makes it difficult to operate, especially in the case of a combine harvester. The problem was that there was severe vibration in the parts.

Furthermore, if only one balancer is attached to the helical transfer shaft, etc., it will not be possible to sufficiently eliminate vibrations in the direction of movement of the center of gravity of the oscillating sorter, but the rotation of the balancer itself will cause vibrations in a different direction. There was a drawback that this occurred.

The present invention aims to improve the above-mentioned drawbacks, and provides a threshing machine in which a swinging sorting body is installed in a sorting air passage below a handling room so as to swing back and forth. Parallel and mutually oppositely rotating balancer shafts are provided before and after the extension line of the center of gravity movement line and at the bottom of the oscillating sorting body, and pairs of balancers with symmetrical weight distribution are attached to these balancer shafts. It is characterized by:

The embodiment shown in the drawings will be explained below.1
is a handling cylinder that is mounted on a shaft in the handling room 2, and a swinging sorting body 5 is installed from the bottom of the receiving net 3 to the dust sorting chamber 4, and the lower sorting path is connected to the receiving net 3. A transfer flow plate 6 facing downward, a sorting net 8 connected to the end thereof and facing above the first receiving gutter 7, and a screening net 8 extending above the first flow plate 10 and extending above the second receiving gutter 9. The upper sorting path is composed of a transfer plate 13 that receives and transfers long straw, ear cuttings, etc. discharged from the dust inlet 12, and a transfer plate 13 that is extended to the transfer plate 13 and is connected to a suction windmill 14. Directional stroke rack 15
It is made up of.

Further, the air blower 16 provided below the starting end of the handling chamber 2 is connected to the sorting net 8 and the upper stroke rack 1.
5, and a sub-separation air path B that blows through the stroke rack 11 between the first receiving gutter 7 and the bottom plate 17 and above the second receiving gutter 9, and then blows out to the dust exhaust port 18. It consists of

Furthermore, the swing sorting body 5 is supported at the front and rear by two pairs of arms 19, 19, 20, and 20 with different inclinations, and one of the arms is attached to the transfer spiral shaft 7a first. Since it is reciprocated back and forth by a crank arm or an eccentric wheel via a rod, the connection point P ₂ at the front of the swinging sorter 5 is between P ₂ '~
The rear connection point P ₁ swings diagonally up and down between P ₁ ′ and _{P 1} ″, and as a result, the center of gravity of _the swinging sorter 5 G moves approximately on the center of gravity movement line YY line.

In front of the Y-Y line below the center of gravity G and above the uppermost receiving gutter 7 of the main sorting air path A, between the bottom plate 21 and the transfer flow plate 6, and the bottom plate 21
and the bottom plate 17 of the sub-sorting air passage B (directly below the flow plate 21 in a threshing machine without a sub-sorting air passage).
- Balancer shafts 22 and 23 parallel to the Y line at the same distance and orthogonal to each other are rotatably supported across both side walls, and the portions of the balancer shafts 22 and 23 that protrude outside the side walls include: Balancers 24, 24, 25, 25, one on each side, are installed symmetrically.

When the above-mentioned threshing machine is mounted on a combine harvester platform to perform reaping and threshing work, the balancer shaft 22,
23 is driven to rotate in opposite directions to each other in synchronization with the swinging sorting body 5 by a transmission mechanism to be described later, and in FIG. 4, when the swinging sorting body 5 swings forward,
A diagonally downward inertial force Fr is generated at the intermediate point, and at this time,
The balancers 24 and 25 generate inertia forces Fb ₂ and Fb ₁ that are half of Fr and in opposite directions, so that the two are balanced.

Furthermore, when the balancers 24 and 25 rotate 180 degrees, inertia forces of -Fb ₂ and -Fb ₁ are generated, and the swinging sorting body 5
produces an inertial force -Fr in the opposite direction, so their sum becomes 0.

Further, since the balancers 24 and 25 always generate opposite and equal inertia forces in the direction orthogonal to the Y-Y line, no vibration occurs.

In the examples shown in Figures 2 and 5, the lower balancer 25a is not installed outside the machine, but is installed between the bottom plates 17 and 21, and because the space is narrow, the distance between its center of gravity and the center of rotation is small. The length was increased by the length as shown in FIG. 5, so that the moment of inertia was the same as that of the opposing upper balancer 24.

With this configuration, the balancer 25a
It is safe because it does not protrude outside the machine, and
By driving the lower part of the balancer 25a to rotate in the same direction as the sub-selecting air passage B, not only does it not become an obstacle to the sorting air, but there is also a wind raising effect.

In addition, balancer shafts 22 on both sides of the transfer flow plate 6
When the balancers 24, 24 are attached to the balancer shaft 22 along the inside of the side wall, the front balancers 24, 25 are stored inside the machine. be able to.

FIG. 3 shows the drive mechanism of the balancer shafts 22 and 23, in which a shows the drive mechanism for the balancer shafts 22 and 23, in which the balancer shaft 22 is connected to the sprocket 27 of the same diameter by the first helical shaft 7a.
27 and chain 28, the balancer shaft 23
is driven by gears 29, 29 of the same diameter,
In b, the balancer shaft 23 is driven by a chain 30, and the balancer shaft 22 is driven by the balancer shaft 23 by gears 31, 31, and in c, gears 32 of the same diameter are meshed in series with the balancer shafts 22, 23. This is a method in which the first conveying spiral shaft 7a is used to drive the first conveying helical shaft 7a.

In these drive mechanisms, a and b have a large number of parts, but the positions of the balancer shafts 22 and 23 can be easily set, and c has a small number of parts, but is limited to the above set positions.

6 and 7 show other embodiments of the present invention, and the threshing machine shown in FIG. 6 is mounted on a combine harvester stand 33, similar to the one shown in FIG. It is not equipped with the sub-sorting air passage B, and the bottom plate 21
Between the lower machine base 33, the side frames 34a, 34a
A balancer chamber 3 surrounded by a bottom frame 34b whose middle part protrudes downward, and a top plate 34c which also serves as a bottom plate.
4, and a balancer shaft 2 is provided on the side frames 34a, 34a.
A pair of left and right balancers 24, 24 are screwed to the balancer shaft 22 with a distance between them on both sides.
By bringing the balancer shafts 24, 25 toward the center and screwing them in correspondence with the protrusion, the balancer shafts 24,
25 can be overlapped in side view to narrow the interval between the balancer shafts 22 and 23, and the balancer chamber 34 can be fitted between the left and right frames of the machine base 33 as shown in FIG. Therefore, the threshing machine does not become expensive.

In addition, the power is transmitted to the balancer shafts 22 and 23 through the third
In the method shown in Figure b, the oscillating sorter 5 oscillating arm 2
0 is driven via a rod 36 by an eccentric wheel 35 attached to the first transfer spiral shaft 7a, as in the previous embodiment, and a grain lifting cylinder 37 is connected to the transfer end of the first transfer spiral shaft 7a. .

The balancer 24 in this embodiment,
25 also has the same vibration-proofing effect as the balancer in the previous embodiment.

As described above, the present invention provides a threshing machine in which a swinging sorting body is installed in a sorting air passage below a handling chamber so as to swing back and forth, in which: In addition, parallel balancer shafts that rotate in opposite directions are provided at the bottom of the oscillating sorting body, and a pair of balancers with symmetrical weight distribution are attached to these balancer shafts, so that the oscillating sorting body cannot oscillate. The vibration in the direction of the center of gravity movement caused by the threshing machine can be reliably removed by the cooperative action of the pair of balancers, and there is no vibration due to mutual rotation of the balancers, and vibration in each direction of the threshing device can be eliminated. can.

[Brief explanation of drawings]

The drawings show one embodiment of the invention,
Figure 1 is a longitudinal sectional view of the threshing machine, Figure 2 is a side view of the main parts of another example, Figures 3a, b, and c are side views of the drive mechanism, and Figure 4 is the implementation shown in Figure 1. Example action diagram, 5th
The drawings are a sectional view taken along the line A-A in FIG. 2, FIG. 6 is a longitudinal sectional view of another embodiment, and FIG. 7 is a sectional view of the essential parts of the same. 5... Rocking sorter, 7a... First helical shaft, 22,2
3... Balancer shaft, 24, 25, 25a... Balancer.

Claims (1)

[Claims] 1. In a threshing machine in which a rocking sorter is installed in the sorting air passage below the handling room so as to swing back and forth, A vibration isolating device for a threshing machine, characterized in that balancer shafts that are parallel and rotate in opposite directions are provided at the bottom, and a pair of balancers with symmetrical weight distribution are attached to the balancer shafts.