JPH0344Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a straw cutter for a screw-type threshing machine, specifically, the straw cutter of the screw-type threshing section is connected to a discharge vane provided at the rear end of the handling drum and a discharge port of the casing. The present invention relates to the process of discharging straw sent to the culm ejecting section by a screw of a device composed of the following.

Prior Art A screw auger, which was originally used to convey grain in the axial direction, can be expanded in diameter and given a predetermined rotational speed to maintain the circumferential speed necessary for the crops. In addition to the function of transporting grains, it also has a threshing function.

Also, at this time, if you change the receiving gutter part of the screw auger to a receiving net of an appropriate size for the crops, the grains threshed in the handling chamber will leak downward from the receiving net, and the stems and straw waste will be removed from the culm. It also has a so-called sorting function that transports it in the axial direction and discharges it outside the machine.

This is a screw-type threshing machine.

In the screw-type threshing machine as described above, the straw sent to the culm discharge section by the screw is cut and discharged by a cylinder cutter provided outside the handling chamber.

Problems that the invention aims to solve: In the conventional screw-type thresher as described above, a cylinder cutter must be installed separately, which not only increases the cost, but also increases the overall length of the combine due to the space required to set the cylinder cutter. There is a drawback.

Means for Solving the Problems Therefore, the technical problem of the present invention is to provide a screw-type threshing machine that does not require a post-processing cutter. It consists of a discharge vane installed at the rear end and a casing, both of which have a larger outer diameter than the receiving screen in the handling chamber, and a cutting edge is provided on the screw side end surface of the discharge vane. .

Effects of the invention This technical means has the following effects.

That is, the straw sent to the discharge culm by the screw tends to be discharged to the outer periphery of the casing by the centrifugal force of the discharge vanes. However, the culms remaining on the receiving net side of the handling room are affected by the resistance of the receiving net, and a speed difference occurs between them and the discharge blade.

Therefore, by using a cutting blade at the end of the discharge culm blade, the horsepower applied to the discharge blade is reduced by cutting the culm with a device that can cut the culm. Since the straw is cut in the handling room, post-processing cutters are not required, and the negative effects of post-harvest plowing work are eliminated.

The embodiments shown in the drawings will be described below.

First, the entire screw-type threshing machine shown in FIG. 1 will be explained.

The crops are raked by a raking reel 1 and cut by a cutting blade 2, and the cut crops are transferred from a raking auger 3 to a chain conveyor 5 in a feeder house 4 to a handling room 6.
The grains are transported to the warehouse and threshed using a screw-type handling drum 7.

The threshed grains fall from the receiving net 8 to the swinging sorting board 9, and are sorted by the blower fan 10 and the swinging sorting board 9.

During this sorting process, grains and fine straw waste leak downward from the sorting plate, and only long straw is carried toward the dust outlet 11.

Leakage including grains falling from the sorting board is subjected to a sorting wind by a blower fan 12 like a winnowing machine, and the grains fall into the first gutter 13 and the second grains fall into the second gutter 14.
The grains that fell into the first gutter 13 are carried to the paddy tank,
The second item is returned to the handling chamber 6 via the thrower cylinder 15. 16 is a crawler equipped with a threshing machine, and 17 is a control section.

In the screw-type threshing machine as described above, the discharge culm part of the handling chamber is composed of the discharge vane 18 at the rear end of the handling cylinder and the casing 19, and the outer diameter D of these is equal to the diameter d of the receiving net 8 of the handling chamber 6. It has a larger configuration, and a cutting blade 20 is provided on the screw side end surface of the discharge vane 18. The discharge vane 18 also has a swept back angle θ° with respect to the direction of rotation.

Specifically, the cutting blade 20 is formed integrally with the discharge blade 18 in an L-shape, and has a relief slope 21 facing toward the back side with respect to the rotation direction.

Note that 22 is a discharge port of the casing.

Further, 23 is a stay of the discharge vane 18.

Since the present invention is constructed as described above, the straw sent to the discharge culm by the screw tends to come out toward the outer periphery of the casing due to the centrifugal force and the receding angle of the discharge vanes 18. On the other hand, the culm remaining in the receiving net 8 is subjected to the resistance of the receiving net 8, and a speed difference is generated between the culm and the discharge blade 18. There, the culm can be cut with the cutting blade 20. Since the cutting blade cuts the straw, the horsepower applied to the discharge blade 18 is reduced.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the entire screw-threshing combine harvester seen from the front, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1, and FIG. 3 is an oblique view of the cutting blade portion. 7...screw type handling barrel, 18...discharge vane,
19...Casing, 20...Cutting blade.

Claims (1)

[Scope of utility model registration request] When the discharge culm part of the screw threshing section is composed of a discharge vane provided at the rear end of the handling drum and a casing, both of which have an outer diameter larger than the receiving screen of the handling chamber, the screw side end face of the discharge vane. Straw cutter for screw-type threshing machine equipped with a cutting blade.