JPH0214362Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a handling barrel in a screw-type threshing machine.

(Prior art) The diameter of the screw auger, which was originally used to convey grain in the axial direction, was expanded and a predetermined rotational speed was applied to the screw blade to maintain the circumferential speed necessary for the crops. In addition to the function of transporting crops, 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. Unexamined Japanese Patent Publication 1983-
The one disclosed in Publication No. 165710 is one example.

The handling barrel of the screw-type threshing machine as described above is equipped with a supply vane at the front, and the screws connected to this are arranged at equal pitches over the entire length of the handling barrel.

(Problem to be solved by the invention) If the screws are arranged at equal pitches over the entire length of the handling barrel as in the past, depending on the size of the pitches, it is difficult to take in the grain at the inlet and it is easy to get clogged. In addition, since the feeding of the grain in the handling barrel is constant and does not slow down, there is little leakage from the receiving net, and there is also a disadvantage that there is a lot of unhandled grain and small grains.

(Means for solving the problem) Therefore, the technical problem of this project is to provide a screw-type threshing machine that prevents grains from clogging or unhandling at the entrance of the handling room, produces fewer grains, and reduces the load on the handling barrel. To this end, in the screw-type handling cylinder, the pitch of the screw is gradually reduced from the inlet toward the rear, and then the pitch is gradually increased from the middle toward the rear, and at the rear end. The pitch is made larger than the pitch at the input start end.

(Function) According to this technical means, the pitch of the screw at the inlet part where the supply blade starts winding is large, so the flow of the crop is fast and the intake is good.

Also, when the grain is taken in, the pitch of the screw gradually becomes smaller, which slows down the flow of the crop and allows it to be carried around, resulting in a good threshing and dispersion effect.

Also, as the pitch increases towards the rear, the flow of crops becomes faster and the load on the handling cylinder is reduced accordingly.

(Example) 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 sorting auger 9, and are moved by the rotating auger 9 toward its terminal end.

During this conveyance process, grains and fine straw waste leak downward from the receiving net 10 stretched over the receiving gutter of the auger 9, and only the long straw is carried toward the culm outlet 11.

Leakage including grains that have fallen from the receiving net 10 is sorted by a blower fan 12 like a winnower and a discharge blade at the end of the handling cylinder, that is, a suction fan 18, and the grains are transferred to the first gutter 13 and the second gutter. The objects fall into the second gutter 14, the grains that fall into the first gutter 13 are carried to the paddy tank, and the second objects are returned to the handling room 6 through the thrower tube 15.

16 is a crawler equipped with a thresher, 17
indicates the control section.

In the screw-type threshing machine of the full input type as described above, a cone section 20 is provided at the front of the handling barrel 7, and a pair of upper and lower supply vanes 19, 19 are provided on this cone section 20. The pitch of the screw 21 formed in the handling cylinder 7 is gradually smaller from the inlet part toward the rear, and then gradually increases from the middle toward the rear. Note that 22 is the culm outlet of the handling room.

Also, if the pitch at the entrance end is _P1 and the pitch at the rear end is _P2 , then _P1 < _P2 .

Needless to say, the pitch _P3 at the intermediate portion of the screw is smaller than any of the pitches mentioned above.

(Effects of the invention) As described above, the pitch of the screw is gradually reduced from the entrance to the rear, and then the pitch is gradually increased from the middle to the rear, so that the crops sent from the feeder house are The large screw pitch at the entrance allows for good uptake, and even if the amount of crops is large due to the all-input type, there will be no clogging at the transition section from the feeder house to the handling room, and the screw pitch toward the middle of the handling barrel will not cause clogging. As the pitches gradually become smaller, the flow of the crops gradually becomes slower, and therefore the threshing dispersion effect is better and there is less occurrence of unhandled grains and small grains. In addition, the pitch gradually increases from the middle of the handling barrel toward the rear, making the flow of crops faster.
Therefore, the load on the handling cylinder can be reduced and the dust can be discharged to the outside.

Since the pitch at the rear end is larger than the pitch at the beginning of the entrance, the flow of the crop at the rear is faster than at the entrance, so that the entire amount of the harvested crop is fed into the screw threshing machine. The handling cylinder will not be overloaded even if the crop is loaded, and the intake of crops at the entrance will not be hindered.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the entire screw-thresher type combine harvester with the main handling barrel, as seen from the front, and Figure 2 is an illustration of the
FIG. 7... Handling cylinder, 19, 19... Supply blade, 21...
... Screw.

Claims (1)

[Scope of utility model registration request] In the screw-type handling barrel of a full-loading combine harvester, the pitch of the screw is gradually reduced from the inlet part toward the rear, and then the pitch is gradually increased from the middle toward the rear, and the pitch at the rear end is made smaller than the pitch at the rear end. A handling barrel for a screw-type threshing machine characterized by being larger than the pitcher at the starting end.