JPH0137406Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an axial flow combine harvester equipped with a screw threshing mechanism.

In conventional axial-flow combine harvesters, the action of the raking part on the threshing mechanism was only to pull the crops sent from the conveyance mechanism into the handling chamber, so the area around this part was constructed of a plate. However, the plate part did not do any special work.

The applicant has been proposing an axial flow type screw threshing (sorting) mechanism for some time, and as a result of various experiments and improvements to put this new mechanism into practical use, it is expected that it will have a threshing action as well as a scraping action. This is an attempt to provide a combine that can be used.

In order to achieve this objective, the present invention is equipped with a reaping/transporting mechanism that is installed on a traveling vehicle body to reap and transport the crops planted in the field, and a reaping/transporting mechanism that is supplied with the entire amount of transported crops to thresh and sort them. threshing·
In an axial flow type combine harvester having a sorting mechanism, a raking device for raking the crops sent from the conveying mechanism into the handling chamber is provided on the front side of the handling barrel of the threshing mechanism, and a raking device is provided around the raking device. It is characterized by having a receiving net installed.

Hereinafter, the present invention will be explained with reference to the illustrated embodiments.

In FIG. 1, reference numeral 1 denotes a vehicle platform equipped with a crawler-type traveling device 2, and a reaping/conveying device 3 for reaping and transporting crops planted in the field is provided at the front of the vehicle platform 1. ing. The reaping/conveying device 3 includes a divider 4, a cutting blade 5, a reel 6, a scraping auger 7 having a crank finger 7a, a conveying body 9 provided on a chain conveyor 8, a floor 10 facing the conveying body 9, and a floor surface. Cutting device 1 installed in
1, etc., and the whole is configured to be vertically adjustable with respect to the ground.

The conveyance end of the conveyor 8 faces the lower front end of a handling chamber 12 whose axis is arranged in the same direction as the direction of movement of the machine body, and a cone-shaped scraping cylinder 13 is disposed in the handling chamber 12 coaxially with the handling chamber 12. and the handling cylinder 14 are integrally mounted on a shaft. A spiral scraping blade 15 and radial handling teeth 16 are provided on the outer periphery of the scraping cylinder 13, and
Screw handling teeth 17 and radial handling teeth 18 are provided on the outer periphery of the handling cylinder 14, and a discharge plate 19 is further provided on the outer periphery of the rear end portion of the handling cylinder 14. The terminal end of the scraping blade 15 and the starting end of the screw handling tooth 17 are connected by a connecting handling tooth 21. Inside the handling chamber cover 20, as shown in FIG.
A dust sending plate 22 is provided so as to intersect with the axes of the handling cylinder 14 and the dust sending plate 22. One end of the dust sending plate 22 is pivotally supported by a pivot pin 22a, and the dust sending plate 22 is fed by an adjusting screw 22b provided at the other end. The dust angle is adjustable.
As shown in FIG. 2, a receiving net 23 consisting of a raking section receiving net 23a and a threshing section receiving net 23b is stretched around the lower outer periphery of the handling chamber 12. A portion of the barrel facing the discharge plate 19 is open to form a discharge culm opening 24.

A sorting chamber 25 is provided below the receiving net 23, and two screw augers 26 are installed in this sorting chamber 25.
are mounted on shafts with their axes parallel to the axes of the handling chamber 12 and the tower barrel 14. A stirring plate 27 is provided between the screw pitches of this screw auger 26.
and a stirring rod 28 are provided, and the screw auger 2
Sorting nets 29 and 30 are stretched over the receiving gutter portions 6 and 26. As shown in FIG. 5, the mesh size of the sorting nets 29 and 30 is such that the front part 29a is fine, the rear part 29b is coarse, and the rear end is open to form a culm opening 31. ing.
The number of screw augers 26 is not limited to two, but may be one or more.
9 and 30 may also be changed as appropriate depending on changes in the screw auger.

A transfer body 32 consisting of a belt conveyor is provided below the front half of the sorting nets 29 and 30, and a wind selection chamber 33 is provided below the conveyance end of the transfer body 32. The sorting wind is blown out from the provided Karakin fan 34.
A No. 1 auger 35 and a No. 2 auger 36 are provided in the lower part of the wind selection chamber 33, and the No. 2 auger 36 communicates with the upper part of the handling chamber 12 via the No. 2 reduction bucket conveyor 37. The rear part of the auger 36 is opened to form a dust exhaust port 38. Reference numeral 39 is a control section.

Next, the operation of this embodiment will be explained in the case of harvesting paddy rice.

After the rice is divided by the divider 4 and raised by the reel 6, the plant base is cut off by the cutting blade 5.
The entire amount is scraped by the scraping auger 7. The raked rice is sent backward by the crank finger 7a, and is transferred to the floor surface 1 by the conveyor 9 of the chain conveyor 8.
0 towards the handling chamber 12, the long stem culm is cut by the cutting device 11. Handling room 1
The rice fed into the rice bowl 2 is first raked by the raking blades 15 of the raking drum 13 and simultaneously conveyed in the axial direction, and is threshed by the radial handling teeth 16 while passing through the screws of the handling drum 14 through the connected handling teeth 21. The grain is transferred to the handling teeth 17, and is subjected to a strong threshing action due to the frictional force generated between it and the receiving net 23 as it is conveyed in the axial direction. The grains threshed by the raking blades 15 and the radial handling teeth 16 immediately leak through the receiving net 23a, and also pass through the dust sending plate 2.
In 2, the movement of the grain to be threshed is controlled, and the radial handling teeth 18 also perform threshing and stirring actions, and most of the grains threshed in the handling chamber 12 (including grains attached to branches and stalks) are removed. All of this, along with small straw debris, leaks through the receiving net 23 and is brought into the sorting chamber 25. The large straw culm remaining in the handling chamber 12 is sent in the axial direction and is discharged from the machine through the discharge culm opening 24 by the discharge plate 19.

The grains and straw waste that have fallen into the sorting chamber 25 are transported in the axial direction by the feeding action of the screw auger 26, while the grains and fine straw waste are transferred to the sorting net 2.
9, 30 leak and fall onto the transfer body 32, large straw waste, grains attached to branches and stalks, ear cut grains, etc. move in the axial direction and pass through the meshes in the rear half of the sorting nets 29, 30. The grains attached to the stalks and the cut grains leak together with some straw debris from the rough parts, and the remaining large straw culm is directly discharged from the machine through the culm discharge port 31. During this time, the stirring plate 27 and stirring rod 28 attached to the screw auger 26 smooth the feeding action of the screw, prevent clogging of the sorting nets 29 and 30, and remove grains, grains attached to branches and stalks, and ears. It works to promote leakage of cut grains, etc.

The grains and small straw debris that have fallen onto the transfer body 32 are subjected to the sorting wind from the Karasaki fan 34 as they fall through the wind selection chamber 33 from the conveyance end of the transfer body 32.
The selected grains fall into the No. 1 auger 35 and are collected by a collecting means (not shown), and small straw waste is discharged from the dust outlet 38 to the outside of the machine. In addition, sorting net 2
The grains attached to the branches and ears that have fallen from the latter half of the grains 9 and 30 are returned to the handling room 12 by the second auger 36 and the second bucket conveyor 37 for re-threshing.

Note that the cutting device 11 is convenient for cases such as long-culm crops and high-moisture crops that require a lot of power to transport in the handling room 12, or when performing high-flow threshing (high-speed work). The straw culm is less entangled around the raking cylinder 13 and the handling cylinder 14, and the required power is also reduced, allowing stable threshing and conveying action to be performed. The cutting device 11 may have one or more cutting blades. Further, the dust sending plate 22 is used to adjust the transfer speed of the threshed grains in the handling chamber 12, and the angle with respect to the moving direction of the threshed grains can be freely changed from the plus side to the minus side with the adjustment screw 22b. ,
Even if the movement is braked by setting the screw to the mass-nace side, the screw is sent by the strong conveying action of the screw handling teeth 17, and is particularly effective for Japanese paddy rice, etc., which have difficulty in shedding.

Further, as shown in FIG. 3, a scraping beater 40 may be provided between the conveyance end of the chain conveyor 8 of the conveyance device and the entrance of the handling chamber 12.

The combine harvester of the present invention can be used to harvest many crops such as rice, wheat, soybeans, buckwheat, and rapeseed.

As explained above, according to the combine harvester of the present invention, a raking device for raking the crops supplied from the conveying mechanism into the handling chamber is provided on the front side of the handling barrel of the threshing mechanism, and a raking device is provided around the periphery of the raking device. By setting up a net, the following effects can be achieved.

Since the threshed grains leak through the receiving net during the raking stage, the threshing efficiency and the leakage rate of the threshed grains are improved.

Since the threshing efficiency of the raking device is improved, the length of the handling chamber and handling barrel can be shortened.

Since the receiving net area becomes wider, the sorting area becomes wider and the sorting efficiency can be improved.

Since the lower part of the scraping device can be used as a sorting mechanism, the length of the sorting mechanism can be shortened.

Since the threshed grains are allowed to leak directly through the receiving net during the raking stage, the occurrence of damaged grains is reduced.

Since the threshing and sorting mechanism can be shortened, the entire combine can be constructed compactly.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of the entire combine harvester showing one embodiment of the present invention, Fig. 2 is a schematic front view of the conveying mechanism and threshing mechanism, and Fig. 3 is a longitudinal side view showing another embodiment of the raking device. , FIG. 4 is a longitudinal sectional front view of the threshing and sorting mechanism, and FIG. 5 is a longitudinal sectional side view of the sorting mechanism. 1... Vehicle chassis, 2... Traveling device, 3... Reaping/conveying device, 4... Divider, 5... Cutting blade, 6... Reel, 7... Scraping auger, 7a... Crank finger, 8 ...Chain conveyor, 9...Transportation body,
10...floor surface, 11...cutting device, 12...handling room, 13...raking cylinder, 14...handling cylinder, 15...
Scraping blades, 16, 18... Radial handling teeth, 17...
Screw handling tooth, 19... Discharge plate, 20... Handling chamber cover, 21... Connecting handling tooth, 22... Dust sending plate, 2
2a... Pivot pin, 22b... Adjustment screw, 23...
... Reception net, 23a ... Scratching section reception net, 23b ... Threshing section reception net, 24, 31 ... Culm opening, 25 ... Sorting room, 26 ... Screw auger, 27 ... Stirring plate, 28 ... Stirring rod, 29,30 ... Sorting net, 2
9a...front part, 29b...rear part, 32...
...Transportation body, 33...Wind selection room, 34...Karami Juan, 35...No. 1 auger, 36...No. 2 auger,
37... No. 2 reduction bucket conveyor, 38...
Dust exhaust port, 39...control unit, 40...beater for scraping.

Claims (1)

[Scope of utility model registration request] An axial-flow type machine equipped with a traveling vehicle body that has a reaping/transfer mechanism that harvests and transports crops planted in the field, and a threshing/sorting mechanism that is supplied with the entire amount of transported crops and threshes and sorts them. In the combine harvester, a raking device for raking the crops sent from the conveying mechanism into the handling chamber is provided on the front side of the handling barrel of the threshing mechanism, and a receiving net is stretched around the raking device. A combine harvester.