JPH0333286B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a grain threshing device for a combine harvester.

In combine harvesters that have a grain tank, in order to discharge the grains in the grain tank to the outside of the machine, the grains are transferred to the outside of the tank by a grain transfer helix at the bottom of the tank, and a grain frying helix connected to this transfer helix is used. A horizontal rotatable ejector tube is provided from the upper end of this hoisting spiral to eject the grains to any position around the machine body (e.g. , see Utility Model Publication No. 125049/1983)
In this case, the head position of the operator in the cockpit is usually higher than the threshing equipment, etc., and the operator may operate while standing up, so the fact that the ejection tube can be rotated at will is not a problem for the operator. It is dangerous to hit someone with the ejector, and to prevent this, the height of rotation of the ejector should be greater than the height when the operator stands up, or the ejector should be rotated so as not to affect the operator. need to be shortened.
Furthermore, in such conventional devices, the discharge tube is configured to be rotated (swiveled) via a gear device by manual rotation of the handle rod, which slows down the response when discharging grains and reduces work efficiency. Moreover, since there are no restrictions on the rotation range except for the upper part of the operator's seat,
There was a problem where the work could not be carried out safely due to the danger.

The present invention takes the following technical measures to eliminate such drawbacks.

That is, a grain tank 2 for storing grains threshed by a threshing device 1 is provided with a grain lifting cylinder 11 equipped with a grain lifting helix 10 for transporting the stored grains in the tank, and a grain lifting cylinder 11 for lifting grains stored in the tank. Hydraulic cylinder 20 located at the upper end
A discharge tube 3 is provided which is connected to the vertical axis of the grain frying helix 10 so as to be able to rotate.
is provided so as to be able to freely rotate back and forth as a rotation area that revolves around the grain tank 2 and the upper part of the threshing device 1, excluding the upper part of the cockpit 4, and the rotation range of the discharge tube 3 is the end of the expansion and contraction stroke of the hydraulic cylinder 20. A combine harvester's grain threshing device is characterized in that it is configured to be regulated by:

This invention has the following technical effects due to such a configuration.

By limiting the rotation range of the discharge tube 3 to the upper part of the grain tank 2 and the threshing device 1 excluding the operator's seat 4, the higher position of the discharge tube 3 is the higher of the grain tank 2 or the threshing device, whichever is higher. Therefore, the height of the machine can be lowered, and the ejection pipe 3 can be made longer to eject grain to a farther distance around the outer periphery of the machine. Furthermore, since the discharge tube is rotated by a hydraulic cylinder, the drive shaft is rotated artificially by turning the handle rod, and the discharge tube is rotated by the meshing of a worm gear and a wheel gear. Compared to the previous model, it is possible to speed up the rotation operation of the discharge tube, further increasing work efficiency.Moreover, since the rotation range of the discharge tube is regulated by the end of the extension/retraction stroke of the hydraulic cylinder, the discharge tube can be rotated more quickly. The machine can be stopped reliably at a position other than the top of the cockpit, and the operator can work with peace of mind without any danger.

In the illustrated example, the front part of the machine body is a reaping device 5, the rear side of this reaping device 5 is provided with a threshing device 1, and one side of this threshing device 1 is provided with a grain tank 2. A control platform section 6 having a control seat 4 is disposed on the front side of the reaping device 5.
A grain transfer helix is provided at the bottom of the grain tank 2 toward the rear, and a transfer helical cylinder 7 is exposed at the rear outside of the tank 2, and a transfer joint part 8 is provided at the rear end of the transfer helical cylinder 7. The upper surface of this joint part 8 is used as a rotating part 9, and a grain lifting cylinder 11 with a grain frying helix 10 inside is installed upright. 3 to upper joint part 1
2. A support shaft 14 having a support portion 13 is provided on the upper side of the transfer helical cylinder 7 at the rear of the early grain tank 2 and protrudes toward the grain lifting cylinder 11.
A next-shaped rack receiver 16 into which the vertical sliding rack 15 is inserted is provided at the four-end portion, and is in contact with the inner surface of the rack receiver 16, meshing with the sliding rack 15, and connecting the bevel gear at the end of the support shaft 14. A pinion gear 18, which is integral with the grain lifting cylinder 17, is rotatably supported by the support shaft 14, and the bevel gear 17 is meshed with a passive bevel gear 19 fixed to the outer periphery of the lower end of the grain lifting cylinder 11. The upper end of the sliding rack 15 is connected to a double-acting hydraulic cylinder 20 that can be driven reciprocatingly, and the upper end of this cylinder 20 is connected from the rear upper end of the grain tank 2 to the grain lifting cylinder 1.
The cylinder 20 of the support rod 21 which pivotally supports the upper end of the cylinder 20 is connected by a pin to a receiving part 22.

The grain culms harvested by the reaping device 5 are conveyed and supplied to the threshing device 1 for threshing, the culms are discharged to the rear of the machine body by the straw removal device, and the grains are accumulated in the grain tank 2 through the sorting device. Ru. When discharging the grains in the grain tank 2 to the outside of the machine, first move the hydraulic lever linked to the hydraulic cylinder 20 in order to align the tip of the discharge tube 3 with the grain discharging position on the left, right or rear sides of the machine. This lever operation causes the vertical sliding rack 15 connected to the hydraulic cylinder 20 to slide upward or downward, and by rotating the pinion gear 18 meshing with this rack 15, the vertical sliding rack 15 connected to the hydraulic cylinder 20 is rotated. Passive bevel gear 1 via bevel gear 17
9 is rotated, and the discharge tube 3 connected to the grain lifting tube 11 to which the bevel gear 19 is fixed is rotated. Next, by rotating the helix in the transfer helical tube 7, the grain-flinging helix 10 and the discharge tube 3 that are linked to this helix are rotated.
As the internal discharge helix rotates, grain tank 2
The grains inside are ejected from the tip of the discharge tube 3. Note that the rotation range A of the discharge tube 3 is the same as that of the hydraulic cylinder 20.
Regulated by vertical stroke amount.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Figure 1 is a plan view, Figure 2 is a partially sectional side view, and Figure 3 is a partially sectional side view.
The figure is a front sectional view of a part thereof. In the figure, reference numeral 1 indicates a threshing device, 2 indicates a grain tank, 3 indicates a discharge pipe, and 4 indicates a driver's seat.

Claims (1)

[Claims] 1 A grain tank 2 that stores grains threshed by the threshing device 1 has a grain lifting cylinder 11 equipped with a grain lifting helix 10 that lifts and transports the stored grains in the tank, and an upper end of this grain lifting cylinder 11. A discharge pipe 3 is provided at the top of the grain tank 2 and the grain tank 2 except for the upper part of the cockpit 4. The upper part of the threshing device 1 is provided as a rotating rotation area that can be freely rotated back and forth, and the rotation range of the discharge pipe 3 is regulated by the end of the expansion and contraction stroke of the hydraulic cylinder 20. Combine harvester's grain threshing equipment.