JPH0536354Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a handling tooth in a threshing machine, particularly a threshing machine for a full-feed type axial flow combine harvester.

(Prior art) In conventional full-feed type axial flow combine harvesters, grain is threshed using a screw-type handling drum.

In order to facilitate the threshing process, handling teeth are fixed to the outer periphery of the spiral of the handling barrel.

Further, a device in which an L-shaped pin is provided on the spiral of the handling barrel and the L-shaped pin is rotated to freely adjust the angle of the tip of the pin in plan view with respect to the spiral is described in U.S. Pat. No. 4,313,449. .

(Problem to be solved by the invention) If the handling teeth arranged on the outer periphery of the spiral are fixed as in the former case, the peripheral speed of the tooth tips is high and they are constantly in contact with the grains, resulting in rapid wear and damage to the receiving net. If proper clearance is not maintained, damaged grains and unhandled grains may occur.

Further, in the pin disclosed in US Pat. No. 4,313,449, the pin is L-shaped, and the grain culm easily gets caught on the tip, which obstructs the flow of the grain culm. Further, no consideration is given to pin wear.

(Means for solving the problem) Therefore, the technical problem of this proposal is to not obstruct the flow of grain culms in a full-feed type axial flow combine.
The purpose of this project is to obtain a threshing machine with handling teeth that can withstand wear and tear.The technical means of this proposal to solve this technical problem is to provide a threshing machine with handling teeth that can withstand wear. The handling teeth are attached in close contact with each other in an overlapping state and can be reassembled upside down, and are fixed to the spiral by a mounting part that is wider than the tip of the tooth in the flow direction of the grain culm. are handling teeth in a threshing machine that protrude from the mounting portion and are attached to the periphery of the spiral in a protruding state.

(Example) First, a conventional full-feed type axial flow combine harvester will be explained based on FIG.

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 grain is then transported to a screw-type handling drum 7, ie, threshed using a spiral handling drum.

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

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

The leakage materials including grains that have fallen from the sorting board are 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 have fallen into the first gutter 13 are carried to the paddy tank by a grain frying conveyor 15, and the second grains are returned to the sorting board 9 through a thrower tube 16.

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

Further, the discharge culm portion of the handling chamber is composed of a discharge vane 18 at the rear end of the handling cylinder and a casing 19.

In the above-mentioned full-feed type axial flow combine, the conventional type in which handling teeth are provided on the periphery of the spiral is a fixed type.

That is, in FIGS. 3 to 5, 7a is a spiral, and the handling teeth 20 are attached to the mounting bracket 21 at an angle of θ.
and is attached to the spiral 7a with a tightening bolt 22.

Conventional handling teeth placed around the outer periphery of the spiral facilitate the threshing process, but the tooth tip has a high circumferential speed and is in constant contact with the grain, so it wears out quickly.
If this handling tooth does not secure an appropriate gap with the receiving net, it will lead to damaged grains and unhandled grains.

Therefore, as shown in FIG. 1, when the tips of the handling teeth wear out, they can be reassembled upside down and used.

That is, when the tip g of the handling tooth becomes worn, loosen the bolt nut 22, turn the handling tooth attachment part, that is, the handling tooth mounting bracket 21 upside down, and install the spiral 7a.
so that the tip h of the handling tooth protrudes from the periphery of the spiral 7a.

With the above configuration, the life is extended, special materials and hardening treatment are not required, and the cost is low.

(Effect of the invention) The handling teeth provided on the outer periphery of the spiral of this invention can be reassembled upside down when the tips of the handling teeth wear out, so the handling teeth can always maintain an appropriate gap with the receiving net.
There are no damaged grains or unhandled grains, the service life is extended, and the cost is low. Moreover, even in the case of a full-feed type axial flow combine harvester, the handling teeth overlap and are attached to the spiraler in close contact with each other, so the grain culm is less likely to get caught and the flow of the grain culm is not obstructed. Therefore, threshing efficiency is not affected.

Since the handling tooth is attached to the spiral with a wider attachment part than the tip of the tooth, the tooth will not be damaged when installing the handling tooth, and even if the handling tooth is rearranged upside down, the worn tooth will not be damaged. does not interfere with installation,
completely fixed.

The attachment part is wider than the tip of the tooth part and is attached in an overlapping manner along the spiral, so the attachment part is parallel to the flow direction of the grain culm and receives less force from the flow of the grain culm. Since it is wide in the flow direction, it has the effect of providing strong and durable handling teeth.

[Brief explanation of the drawing]

Figure 1 is a front view of the proposed handling tooth, Figure 2 is an overall view of a conventional full-feed type combine harvester, and Figures 3, 4, and 5 are a front view, cut side view, and slope view showing conventional handling teeth. . 1... Scraping reel, 2... Cutting blade, 3... Scraping auger, 4... Feeder house, 5... Chain conveyor, 6... Handling room, 7... Handling barrel, 7a...
Spiller, 20, 20f...handling teeth, 21...mounting bracket, 22...tightening bolt.

Claims (1)

[Scope of utility model registration request] A handling tooth that is attached to the spiral of a screw-type handling barrel in a full-feed axial flow combine in an overlapping state and can be reassembled upside down, and has a width from the tip of the tooth in the grain culm flow direction. Handling teeth in a threshing machine that are fixed to the spiral by a wide attachment part, and the teeth protrude from the attachment part and are attached to the periphery of the spiral.