JP7527951B2 - Threshing equipment - Google Patents

Description

The present invention relates to a threshing device that is equipped with a threshing chamber into which the entire harvested crop is fed, and a threshing drum that is rotatably mounted in the threshing chamber.

The above-mentioned threshing device includes a threshing drum support shaft that is rotatably mounted on the threshing drum in a position along the front-to-rear direction of the threshing chamber, a plate-shaped intermediate support member that is supported at the middle part of the axial direction of the threshing drum support shaft, a rear support member that is supported on the threshing drum support shaft rearward of the intermediate support member, a number of rod-shaped threshing tooth support members that are supported by the intermediate support member and the rear support member with spaces between them in the circumferential direction of the threshing drum, and a number of rod-shaped threshing teeth that protrude from the tooth support member toward the radial outside of the threshing drum and are supported by the threshing tooth support member with spaces between them in the direction along the threshing drum support shaft.

One example of this type of threshing device is shown in Patent Document 1. The threshing device shown in Patent Document 1 is equipped with a threshing drum shaft as the threshing drum support shaft, a front support plate and a partition plate as the middle support members, a rear support plate as the rear support member, and a round pipe as the threshing teeth support member.

JP 2014-161263 A

In the above-mentioned threshing device, the threshing load on the threshing teeth is applied to the rod-shaped threshing teeth support member, but there is a demand for a threshing device that can firmly support the threshing teeth support member so that it does not deform, even if a large amount of crops is put into the threshing chamber and a heavy threshing load is applied to the threshing teeth, and that can perform threshing properly.

The present invention provides a threshing device that can simplify the support structure of the threshing tooth support member, prevent the threshing material from getting caught, and prevent deformation of the threshing tooth support member even when a strong threshing load is applied to the threshing tooth.

The threshing device according to the present invention comprises:
The threshing drum is provided with a threshing chamber into which the entire harvested crop is fed, and a threshing drum rotatably mounted in the threshing chamber, the threshing drum being provided on the threshing chamber in an orientation along the front-to-rear direction of the threshing chamber, a plate-shaped intermediate support member supported at an intermediate portion in the axial direction of the threshing drum support shaft, a rear support member supported on the threshing drum support shaft rearward of the intermediate support member, a plurality of rod-shaped threshing tooth support members supported by the intermediate support member and the rear support member at intervals in the circumferential direction of the threshing drum, and each of the plurality of threshing tooth support members is provided with a threshing tooth support member protruding from the threshing tooth support member toward the radial outside of the threshing drum and spaced apart in the direction along the threshing drum support shaft. The intermediate support member is provided with a plurality of rod-shaped handling teeth supported by a tooth support member, and the intermediate support member is provided with a reinforcing plate which is overlapped and welded to the central portion of the intermediate support member, and a curved portion formed in the intermediate support member radially outward of the reinforcing plate , the intermediate support member has a support shaft member mounting hole through which the handling cylinder support shaft is inserted, and is attached to the handling cylinder support shaft at the support shaft member mounting hole and welded to the handling cylinder support shaft around the support shaft member mounting hole, and the reinforcing plate has a reinforcing plate mounting hole through which the handling cylinder support shaft is inserted, and is attached to the handling cylinder support shaft at the reinforcing plate mounting hole and welded to the handling cylinder support shaft around the reinforcing plate mounting hole .

According to this configuration, the intermediate support member is reinforced by the reinforcing plate and the curved portion, so the rigidity of the intermediate support member can be increased, and the support structure of the threshing tooth support member can be a simple structure of just providing the intermediate support member with a reinforcing plate and a curved portion, and even if a strong threshing load is applied to the threshing tooth, the threshing tooth support member is firmly supported by the intermediate support member, preventing deformation of the threshing tooth support member. Because the connecting means connecting the reinforcing plate to the intermediate support member is welded, threshed material that has entered the internal space of the threshing drum does not get caught on the connecting means.

In the present invention,
It is preferable that the bent portion is connected in a circular shape.

With this configuration, the curved portion effectively reinforces the intermediate support member, further increasing the rigidity of the intermediate support member and more effectively preventing deformation of the tooth support member.

In the present invention,
It is preferable that the bent portion is bent toward the side opposite to the side on which the reinforcing plate is provided.

If the bending direction of the bent portion coincides with the direction of the side on which the reinforcing plate is located, the reinforcing plate will be located in the internal space of the bent portion, making it difficult to weld the reinforcing plate to the intermediate support member. Also, the threshed material located in the internal space of the bent portion is likely to become stuck between the reinforcing plate and the intermediate support member. With this configuration, the reinforcing plate is located on the opposite side of the intermediate support member from the side on which the internal space of the bent portion is located, making it easy to weld the reinforcing plate to the intermediate support member. Also, even if the threshed material enters the internal space, it is easy to come out, and the threshed material does not remain in the internal space.

In the present invention,
The reinforcing plate is preferably provided on a front side of the intermediate support member.

In the present invention,
It is preferable that the scraping section is supported on the front part of the threshing drum support shaft and is provided with a scraping section which scrapes the crops introduced into the threshing chamber toward the rear part of the threshing drum, and that the scraping section is provided with a base part supported by the intermediate support member and a spiral blade which is provided on the outer periphery of the base part and protrudes from the outer periphery of the base part toward the outside of the base part and scrapes the crops toward the rear part of the threshing drum.

With this configuration, the base is firmly supported by the highly rigid intermediate support member, so the intermediate support member is used to support the base, simplifying the support structure of the base, and even if a strong raking load is applied to the spiral blade, deformation of the base can be prevented, allowing crops to be raked accurately.

In the present invention,
It is preferable that the rear support member is provided with a reinforcing plate which is overlapped and welded to the central portion of the rear support member, and a bent portion formed in the rear support member radially outward of the handling drum than the reinforcing plate.

With this configuration, the rear support member is reinforced by the reinforcing plate and the curved portion, so the rigidity of the rear support member can be increased and the handling tooth support member is also firmly supported by the rear support member.

In the present invention,
and an extension shaft that protrudes rearward from the rear support member, extends the handling cylinder support shaft rearward, and is rotatably supported on the rear wall of the handling chamber, wherein the extension shaft has a shaft portion supported on the rear wall and a connecting portion connected to the shaft portion and the rear support member for attaching the shaft portion to the rear support member, and the connecting portion is connected to the shaft portion by being integrally formed with the shaft portion, and is preferably configured as a hollow structure that widens towards the support member side with an outer diameter larger towards the rear support member.

With this configuration, the connecting part and the shaft part can be firmly connected by being integrally formed, and the connecting part can be firmly connected to the rear support member by widening the connecting part's connecting area with the rear support member, and the hollow structure of the connecting part can reduce the weight of the extension support shaft, so that the handling drum is supported on the rear wall by the extension support shaft, while the supporting structure for the handling drum can be made lighter and the handling drum can be firmly supported on the rear wall.

FIG. 2 is a left side view showing the entire combine harvester. FIG. A cross-sectional view of the threshing drum. FIG. FIG. 4 is a cross-sectional view of an intermediate support member. A cross-sectional view showing the support structure at the rear of the threshing drum. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 3. IX-IX cross-sectional view of FIG. 3. FIG. FIG. 13 is a side view showing the chaff sieve and the gap adjustment mechanism in which the gap between the first region and the second region is adjusted to the reduced side. FIG. 13 is a side view showing the chaff sieve and the gap adjustment mechanism in which the gap between the first region and the second region is adjusted to the enlarged side. FIG. A cross-sectional view showing the support structure at the rear of the threshing drum. A cross-sectional view showing a threshing machine having a shaking sorting device with another embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the following explanation, with regard to the running body of the combine, the direction of arrow F shown in Figure 1 is referred to as the "forward body", the direction of arrow B is referred to as the "rearward body", the direction of arrow U is referred to as the "upward body", the direction of arrow D is referred to as the "downward body", the direction toward the front of the page is referred to as the "leftward body", and the direction toward the back of the page is referred to as the "rightward body".

[Overall information about combine harvesters]
As shown in FIG. 1, the combine harvester has a machine frame 1 formed by connecting a plurality of steel materials such as square pipe materials, and a traveling machine body 3 having a pair of left and right crawler-type traveling devices 2 provided at the bottom of the machine frame 1. A driving section 4 and a reaping and conveying section 5 are provided at the front of the traveling machine body 3. The driving section 4 is provided with a driver's seat 4a. An engine 6 is provided below the driver's seat 4a. The reaping and conveying section 5 is provided with a reaping section 5A provided at the front of the reaping and conveying section 5, which harvests crops such as rice and wheat by a clipper-type reaping device 7 during work travel, and a feeder 8 extended backward from the rear of the reaping section 5A and conveys the crops harvested by the reaping section 5A backward. The reaping and conveying section 5 is provided in a state in which it can be raised and lowered by swinging around a connecting shaft core P facing the left and right of the machine body as a swing fulcrum, and is raised and lowered by the extension and contraction of a lifting cylinder 9 connected to the machine frame 1 and the feeder 8. A threshing device 10 that receives the crops transported by the feeder 8, threshes them, and sorts the threshed crops is provided at the rear of the machine frame 1, as well as a grain tank 11 that collects and stores the grains obtained by the threshing device 10. The threshing device 10 and the grain tank 11 are provided side-by-side. A grain discharge device 12 that discharges grains from the grain tank 11 is connected to the rear of the grain tank 11.

[About the configuration of the threshing device]
In explaining the threshing device 10 and the threshing drum 13, the processing start side of the threshing device 10 and the threshing drum 13 [the stump input side (left side of the paper in Figure 2)] will be referred to as the "front", and the processing end side of the threshing device 10 and the threshing drum 13 [the stump discharge side (right side of the paper in Figure 2)] will be referred to as the "rear".

As shown in FIG. 2, the threshing device 10 is equipped with a threshing section 10A that threshes the threshed stalks transported by the feeder 8 as the crop to be threshed, and a sorting section 10B that sorts the threshed product. In the threshing device 10, the threshing direction in the threshing section 10A coincides with the front-to-rear direction of the traveling body 3, and the upstream side of the threshing direction is set to be located in front of the traveling body 3.

As shown in FIG. 2, the threshing section 10A is provided with a threshing chamber 14 formed at the top of the threshing device 10. The threshing chamber 14 is provided with a threshing drum 13. The threshing drum 13 is driven to rotate in a clockwise direction as viewed from the front, with the threshing drum support shaft 25 as the center of rotation. A supply port 16 is formed at the front lower part of the threshing chamber 14, which allows the threshing material to be fed into the threshing chamber 14. A dust discharge port 17 is formed at the rear lower part of the threshing chamber 14, which allows the threshing dust to be discharged outside the threshing chamber. A receiving net 18 is provided in the area below the threshing drum 13 within the periphery of the threshing drum 13.

The handling chamber 14 is defined by a front wall 19 and a rear wall 20 that support the handling drum 13, a top plate 21 provided above the handling drum 13, and a receiving net 18. A number of dust transfer valves 22 are provided inside the top plate 21, arranged in the front-to-rear direction of the handling chamber 14. As shown in FIG. 2, the handling drum 13 has a pick-up section 13A provided at the front of the handling drum 13, and a pick-up processing section 13B provided at the rear of the pick-up section 13A on the handling drum 13. The pick-up processing section 13B is connected to the rear of the pick-up section 13A.

In the threshing section 10A, the entire harvested stalks from the base to the tip, which are fed into the threshing chamber 14 from the feeder 8 through the supply port 16, are raked by the raking section 13A toward the rear of the threshing drum 13 as threshing material, and are threshed by the threshing section 13B and the receiving net 18. The threshing material to be threshed is given a rotational force by the rotating threshing section 13B and hits the dust sending valve 22, which guides it to flow toward the rear of the threshing chamber 14. The threshing material is threshed while being transported toward the rear of the threshing chamber 14 by the threshing section 13B. The grains obtained by the threshing process leak down from the receiving net 18. The threshing waste stalks and broken straw generated by the threshing process are discharged from the dust discharge port 17 to the outside of the threshing chamber 14.

[About the configuration of the handling drum]
2, the threshing drum 13 is provided in the handling chamber 14 in a position along the front-to-rear direction of the handling chamber 14, and includes a threshing drum support shaft 25 that is driven to rotate about the threshing drum axis Y, a sweeping section 13A supported at the front of the threshing drum support shaft 25, and a threshing processing section 13B supported at a portion of the threshing drum support shaft 25 rearward of the sweeping section 13A. The threshing processing section 13B is provided in a state connected to the rear of the sweeping section 13A.

[Configuration of the scraping section]
As shown in Figs. 2 and 3, the raking section 13A is provided with a front support member 26 supported at the front of the threshing drum support shaft 25, and a front intermediate support member 27a of the plate-shaped intermediate support members 27 supported at two points, front and rear, of the middle part of the threshing drum support shaft 25. A base section 28 is connected between the outer periphery of the front support member 26 and the outer periphery of the intermediate support member 27a. The base section 28 is supported on the threshing drum support shaft 25 via the front support member 26 and the intermediate support member 27a. A spiral blade 29 is provided on the outer periphery of the base section 28. The spiral blade 29 is provided in a state in which it protrudes from the outer periphery of the base section 28 to the outside of the base section 28. Two spiral blades 29 are provided in a double spiral state arranged at an interval in the circumferential direction of the base section 28. In this embodiment, the base section 28 is configured in a front-side tapered state in which the diameter is smaller toward the front end side of the threshing drum 13. Specifically, the base portion 28 is configured from a sheet metal member rolled into a truncated cone shape.

In the raking section 13A, the base 28 is driven by the threshing body support shaft 25 via the front support member 26 and the middle support member 27a, and the two spiral blades 29 are driven to rotate around the threshing body axis Y. The entire harvested stalk, from the base to the tip, which is fed into the threshing chamber 14 from the supply port 16 by the feeder 8, is raked toward the rear of the threshing body 13 along the guide bottom plate 30 (see Figure 2) by the rotating spiral blades 29.

[Configuration of the processing unit]
As shown in Figs. 2 and 3, the threshing processing section 13B includes a plate-shaped intermediate support member 27 supported at two positions, front and rear, of the middle part of the threshing drum support shaft 25, and a plate-shaped rear support member 31 supported on the threshing drum support shaft 25 rearward of the rear intermediate support member 27b of the two intermediate support members 27. A plurality of rod-shaped threshing tooth support members 32 are supported along the threshing drum support shaft 25 across the two intermediate support members 27 and the rear support member 31. The plurality of threshing tooth support members 32 are supported in a spaced-apart state in the circumferential direction of the threshing drum 13. Each of the plurality of threshing tooth support members 32 is provided with a plurality of rod-shaped threshing teeth 33. The plurality of threshing teeth 33 of each threshing tooth support member 32 are provided in a spaced-apart state in the direction along the threshing drum support shaft 25 and in a state protruding from the threshing tooth support member 32 toward the radially outward side of the threshing drum 13.

In this embodiment, six handling teeth support members 32 are provided, but five or fewer or seven or more may be provided. In this embodiment, the handling teeth support members 32 are made of round pipe steel. In addition to round pipe steel, various rod-shaped members such as round steel, square bar steel, and square pipe steel can be used for the handling teeth support members 32. In addition, angle material and channel material can also be used for the handling teeth support members 32. In this embodiment, each handling tooth 33 is made of round steel. In addition to round steel, various rod-shaped members such as square bar steel, round pipe material, and various pipe materials can be used for the handling teeth 33.

The threshing drum 13 is configured in a cage shape with an internal space S1 (see Figure 2) formed inside that communicates with the handling chamber 14 via the space between the handling tooth support members 32, and is configured to have multiple handling teeth 33 that protrude from the outer peripheral surface of the threshing drum 13 toward the outside in the threshing drum radial direction and are aligned at intervals in the circumferential direction and processing direction of the threshing drum 13, forming a so-called bar-shaped threshing drum.

The threshing drum 13 therefore rotates around the threshing drum support shaft 25 in the processing direction as the center of rotation, introducing the threshed material from the pick-up section 13A between the threshing processing section 13B and the receiving net 18. The threshing drum 13 performs threshing processing on the threshed material located in the threshing processing space S2 (see Figure 2) between the receiving net 18 by striking with the threshing tooth support member 32 and the threshing teeth 33 and combing with the threshing teeth 33, etc., and allows the processed material obtained by this threshing processing to enter the internal space S1, and while stirring the processed material in the threshing processing space S2 and the processed material in the internal space S1, performs threshing processing on these processed materials by striking with the threshing tooth support member 32 and the threshing teeth 33 and combing with the threshing teeth 33, etc.

[Support of the tooth support member]
Each of the handle tooth support members 32 is supported on the front intermediate support member 27a by abutting a connecting bracket 34 provided at the front end of the handle tooth support member 32 against the rear side of the front intermediate support member 27a and fastening the connecting bracket 34 to the intermediate support member 27a with a connecting bolt, as shown in Figures 4 and 7. The connecting bracket 34 is connected to the intermediate support member 27a with two connecting bolts. The connecting bracket 34 is welded to the handle tooth support member 32. Each of the handle tooth support members 32 is supported on the rear intermediate support member 27b by a connecting bracket 35 provided at a midpoint of the handle tooth support member 32 and fastening the connecting bracket 35 to the rear intermediate support member 27b with a connecting bolt, as shown in Figures 5 and 8. The connecting bracket 35 is connected to the intermediate support member 27b with one connecting bolt. The connecting bracket 35 is welded to the handle tooth support member 32. 6 and 9, each of the tooth support members 32 is supported on the rear support member 31 by abutting a connecting bracket 36 provided at the rear end of the tooth support member 32 against the front side of the rear support member 31 and fastening the connecting bracket 36 to the rear support member 31 with a connecting bolt. The connecting bracket 36 is connected to the rear support member 31 with two connecting bolts. The connecting bracket 36 is welded to the tooth support member 32.

[Configuration of intermediate support member and rear support member]
The two front and rear intermediate support members 27 and the rear support member 31 are connected to the throttling drum support shaft 25 by welding. As shown in Figures 3, 4 and 5, the two front and rear intermediate support members 27 are provided with a reinforcing plate 37 welded to the side of the center of the intermediate support member 27 and a curved portion 38 formed in a portion of the intermediate support member 27 that is radially outward of the reinforcing plate 37. The reinforcing plate 37 is also welded to the throttling drum support shaft 25. Each intermediate support member 27 is reinforced by the reinforcing plate 37 and the curved portion 38. As shown in Figures 7 and 8, the curved portion 38 of each intermediate support member 27 is formed in a ring-shaped connection. Each intermediate support member 27 is configured in a disk shape.

[About the structure supporting the handling cylinder]
The threshing drum 13 is supported on the front wall 19 by connecting an input member 39 provided at the front end of the threshing drum support shaft 25 to the front wall 19 via a bearing 40 and a bearing holder 41, as shown in Fig. 4. The input member 39 is connected to a flange portion 25a provided on the threshing drum support shaft 25 so that the front support member 26 is connected thereto. The input member 39 is configured so that a threshing drum drive shaft 42a provided on a threshing drum drive mechanism 42 (see Fig. 2) located on the front outer side of the threshing apparatus 10 is inserted into the input member 39, and the power of the threshing drum drive shaft 42a is transmitted to the threshing drum support shaft 25.

As shown in FIG. 6, the handling drum 13 is supported on the rear wall 20 by an extension shaft 43 that extends the handling drum support shaft 25 rearward and protrudes rearward from the rear support member 31, and the extension shaft 43 is connected to the rear wall 20 via a bearing 44 and a bearing case 45.

As shown in FIG. 6, the extension shaft 43 has a shaft portion 43a that is supported on the rear wall 20 by being fitted into the bearing 44, and a connecting portion 43b that is connected to the shaft portion 43a and the rear support member 31 to attach the shaft portion 43a to the rear support member 31.

As shown in FIG. 6, the connecting portion 43b is connected to the shaft portion 43a by being molded integrally with the shaft portion 43a. The connecting portion 43b is configured to have a hollow structure that widens toward the support member side, with an outer diameter that is larger toward the rear support member side. The connecting portion 43b includes a flange portion 43c formed at the end of the connecting portion 43b on the support member side, and is configured to be connected to the rear support member 31 by fastening and connecting the flange portion 43c to the rear support member 31 with a connecting bolt 46.

[About the composition of the sorting section]
2, the sorting section 10B is equipped with a oscillating sorting device 50 provided below the receiving net 18, and a winnower 60 provided in front of and below the oscillating sorting device 50. The oscillating sorting device 50 is driven to swing by a drive mechanism 52 connected to the rear of the oscillating sorting device 50 such that the rear end side swings up and down with the front end side as the swing fulcrum.

In the sorting section 10B, the sorted material such as grains and straw chips that have leaked through the processing material leakage holes of the receiving net 18 are received by the oscillating sorting device 50, and the received sorted material is sifted and sorted by the oscillating sorting device 50 while being transported toward the rear of the sorting section 10B, and is also wind-sorted by the sorting wind supplied by the winnower 60, and is sorted into No. 1 processed material (single grains), No. 2 processed material (unsingle grains), and No. 3 processed material (dust such as straw chips).

[Configuration of the shaking separator]
2 and 10, the oscillating separator 50 includes a sieve case 51 that is oscillated by a drive mechanism 52. The sieve case 51 includes left and right side plates 51a.

As shown in Figures 2 and 10, a grain pan 53 extends rearward from the front end of the sieve case 51 between the left and right side plates 51a of the sieve case 51. A chaff sieve 55 is provided below and rearward of the grain pan 53. The chaff sieve 55 has a plurality of chaff flip plates 55a arranged in parallel with a gap in the fore-and-aft direction of the chaff sieve 55. A straw rack 56 is provided behind the chaff sieve 55. A second grain pan 57 is provided below the front of the chaff sieve 55, and a grain sieve 57a is provided rearward of the second grain pan 57.

The sorted material that leaks down from the front of the receiving net 18 is received by the grain pan 53, and is sifted as it is transported backward by the grain pan 53. The sorted material that falls backward from the grain pan 53 and the sorted material that leaks down from the middle of the receiving net 18 are received by the chaff sieve 55, and is sorted into grains and dust by sifting with the chaff sieve 55 while being transported backward by the chaff sieve 55, and by wind sorting with the sorting wind from the winnower 60. The grains and other processed material sorted by the chaff sieve 55 leak down from the gap 55b between the chaff flip plates. The grains and other processed materials that have leaked from the chaff sieve 55 are received by the second grain pan 57 and the grain sieve 57a, and are transported rearward by the second grain pan 57 and the grain sieve 57a, where they are separated into grains and dust by sieving with the second grain pan 57 and the grain sieve 57a and by wind sorting with the sorting wind from the winnower 60. The dust and other processed materials that are discharged rearward from the chaff sieve 55 are received by the straw rack 56, and are transported by the straw rack 56 toward the discharge section located at the rear of the threshing device 10, where they are separated by the straw rack 56 and by the sorting wind from the winnower 60, where they are separated into grains and dust. The third processed material (dust) that has been sorted by the straw rack 56 is discharged outside the threshing device 10.

2 and 10, a No. 1 screw conveyor 64 is provided below the oscillating sorting device 50 behind the winnower 60, extending in the width direction of the threshing device 10, and a No. 2 screw conveyor 65 is provided behind the No. 1 screw conveyor 64, extending in the width direction of the threshing device 10. A processed material guide member 67 is provided between the No. 1 screw conveyor 64 and the No. 2 screw conveyor 65. The processed material guide member 67 has a first guide portion 67a with a downward slope toward the No. 1 screw conveyor 64, and a second guide portion 67b that extends downward from the top 67t of the first guide portion 67a toward the No. 2 screw conveyor 65. A No. 2 guide member 71 with a downward slope toward the No. 2 screw conveyor 65 is provided behind the No. 2 screw conveyor 65. A second downflow guide 72 with a downward front slope toward the second screw conveyor 65 is provided at the rear lower portion of the sieve case 51. The second downflow guide 72 has an upstream guide 72b and a downstream guide 72a. As shown in FIG. 10, the second downflow guide 72 is configured so that the downward front angle b of the downstream guide 72a is steeper than the downward front angle a of the upstream guide 72b.

The No. 1 processed material (single grains) selected by the oscillating sorting device 50 is extended from the bottom of the sieve case 51 toward the first guide section 67a, and is guided downward to the No. 1 screw conveyor 64 by the No. 1 flow-down guide sheet 68, whose free end is placed on the first guide section 67a, and the first guide section 67a, and is collected on the No. 1 screw conveyor 64. The collected grains are transported by the No. 1 screw conveyor 64 to the outer side of the grain tank of the threshing device 10 in the direction along the width of the oscillating sorting device 50, and are transported to the grain tank 11 by the lifting device 66 connected to the No. 1 screw conveyor 64.

The No. 2 processed material (grains that have not been single-grained) that has leaked out from the rear of the chaff sieve 55 is guided down to the No. 2 screw conveyor 65 by the No. 2 chute 70 that extends from the bottom of the sieve case 51 toward the No. 2 guide section 67b and the No. 2 guide section 67b, and is collected on the No. 2 screw conveyor 65. The No. 2 processed material that has leaked out from the straw rack 56 falls into the No. 2 flow-down guide section 72, and is guided down to the No. 2 screw conveyor 65 by the No. 2 flow-down guide section 72, and is collected on the No. 2 screw conveyor 65. The No. 2 processed material collected on the No. 2 screw conveyor 65 is transported by the No. 2 screw conveyor 65 to the lateral outside of the grain tank side of the threshing device 10 in the direction along the width direction of the oscillating sorting device 50, and is returned to the starting end of the oscillating sorting device 50 by the return device 69 connected to the No. 2 screw conveyor 65. When the second processed material is guided down by the second downflow guide section 72, it is sieved by a step that is formed at the boundary between the downstream guide section 72a and the upstream guide section 72b due to the difference in the forward incline angle between the downstream guide section 72a and the upstream guide section 72b.

As shown in FIG. 10, an inlet portion 58 that receives the sorting air from the winnower 60 into the sieve case 51 is formed at the bottom of the sieve case 51 below the grain pan 53 and forward of the chaff sieve 55. The inlet portion 58 is located forward of the second grain pan 57. The sorting air from the winnower 60 flows toward the inlet portion 58, guided by the first guide member 61.

As shown in FIG. 10, in the area inside the sieve case 51 below the grain pan 53 and in front of the chaff sieve 55, an air passage 59 is formed by a guide member 59aa, which directs the sorting air blown in from the inlet 58 to between the grain pan 53 and the front of the chaff sieve 55. The air passage 59 is configured so that there is no air direction member that guides the sorting air flowing through the air passage 59. The absence of an air direction member in the air passage 59 means that even if there are bolts or reinforcing members located on the side plate 51a, these do not correspond to air direction members, and nothing is provided in the air passage 59. The sorting air accurately hits the sorting material falling from the grain pan 53 toward the chaff sieve 55.

The guide member 59a is located at the front of the air passage 59, and the sorting wind blown in from the inlet 58 is directed rearward and upward by the guide member 59a. The sorting wind does not escape too far upwards between the rear end of the grain pan 53 and the front end of the chaff sieve 55, but flows rearward.

The guide member 59a is configured to direct the sorting air blown in from the inlet 58 toward the front end of the chaff sieve 55, and to split the air into the upper part above the chaff sieve 55 and the lower part below the chaff sieve 55 by the front chaff flip plate 55af of the chaff sieve 55. The dust from the processed material that has leaked from the chaff sieve 55 is swept backward by the sorting air flowing below the chaff sieve,

The sorting air supplied by the winnower 60 is guided by the second guide member 62 provided on the second grain pan 57 toward the rear of the sieve case 51, passes through the grain sieve 57a from bottom to top, and then passes through the chaff sieve 55 from bottom to top to exit above the sieve case 51. The sorting air supplied by the winnower 60 is guided by the bottom plate 63 that forms the air outlet of the winnower 60 toward the rear of the sieve case 51, passes through the straw rack 56 from bottom to top to exit above the sieve case 51.

[About the composition of chaff sheaves]
As shown in Figure 10, the chaff sieve 55 has a plurality of chaff flip plates 55a arranged at intervals in the front-to-rear direction of the sieve case 51, and the processed material is sifted and selected by the chaff flip plates 55a, and the selected processed material such as the No. 1 processed material is allowed to leak through the gaps 55b between the chaff flip plates 55a.

As shown in FIG. 10, the chaff sieve 55 is configured so that the gap 55d between the chaff flip plates 55a at the front is narrower than the gap 55d between the chaff flip plates 55a at the rear. The front of the chaff sieve 55 is provided with a first area A1 where the gap 55d between the chaff flip plates 55a is narrow, and the rear of the chaff sieve 55 is provided with a second area A2 where the gap 55d between the chaff flip plates 55a is wide.

As shown in FIG. 10, the chaff sieve 55 is configured so that the boundary 55K between the first area A1 and the second area A2 is located forward of the center 55C in the fore-aft direction of the chaff sieve 55. The fore-aft length of the chaff sieve 55 is the length from the front end of the foremost gap 55b to the rear end of the last gap 55b. The second area A2 is where the sorting process material containing a lot of dust is located, and the sorting process material containing a lot of dust is thoroughly sorted by the second area A2, which has a longer fore-aft length than the first area A1.

As shown in FIG. 10, the first area A1 extends beyond the position corresponding to the center 18C of the receiving net 18 in the front-to-rear direction. A large amount of the sorting material that leaks from the front of the receiving net 18 is received by the first area A1 and sorted.

As shown in FIG. 10, the second area A2 extends beyond the position XT corresponding to the axis X of the second screw conveyor 65. The material contained a lot of dust and positioned in the second area A2 is sorted while being transported beyond the axis of the second screw conveyor 65.

As shown in FIG. 10, the boundary 55K between the first area A1 and the second area A2 is located forward of the position corresponding to the top 67t of the first guide portion 67a of the processed material guide member 67. The first processed material that has leaked from the front of the second area A2 falls into the first guide portion 67a and is guided by the first guide portion 67a to flow down to the first screw conveyor 64.

The chaff sieve 55 is provided with a gap adjustment mechanism 75, which is configured to adjust the gap 55b in the first area A1 and the gap 55b in the second area A2. Specifically, the gap adjustment mechanism 75 is configured as follows.

In the following description, the chaflip plate 55a in the first area A1 will be referred to as the first chaflip plate 55a, and the chaflip plate 55a in the second area A2 will be referred to as the second chaflip plate 55a.

As shown in FIG. 11, a support member 82 that rotatably supports the upper portions of the first and second chaflip plates 55a and 55a is supported by the side plate 51a. The first and second chaflip plates 55a and 55a are configured to be rotatable relative to the side plate 51a with a pivot point located at the upper portion as the pivot point.

As shown in Figures 11 and 12, the gap adjustment mechanism 75 includes a link member 76 that links the first chaflip plate 55a and the lower part of the first chaflip plate 55a on the inside of the side plate 51a, and an adjustment member 77 that is provided on the outside of the side plate 51a and can be operated manually. The adjustment member 77 includes a guide mechanism 78 that guides the swinging of the adjustment member 77, and a positioning mechanism 79 that positions the adjustment member 77 at the operating position.

The link member 76 is pivotally supported at the bottom of the first chaflip plate 55a and the second chaflip plate 55a, and can be moved back and forth relative to the side plate 51a, allowing the first chaflip plate 55a and the second chaflip plate 55a to be swung back and forth.

The adjustment member 77 is connected to the shaft 80 that pivots the chaflip plate 55ak located at the boundary 55K between the first area A1 and the second area A2 to the side plate 51a outside the side plate 51a, and is interlockingly connected to the chaflip plate 55ak located at the boundary 55K.

In the gap adjustment mechanism 75, as shown in Figures 12 and 13, when the adjustment member 77 is swung around the support shaft 80 and guided by the guide mechanism 78, the support shaft 80 is rotated, the chaflip plate 55ak at the boundary 55K is swung relative to the side plate 51a, the link member 76 is moved forward and backward by the chaflip plate 55ak, the first chaflip plate 55a and the second chaflip plate 55a are swung in the same direction as the swung direction of the chaflip plate 55ak, and the gap 55b between the first chaflip plates 55a and the gap 55b between the second chaflip plates 55a are adjusted. That is, the gap 55b in the first area A1 and the gap 55b in the second area A2 are changed to the enlarged or reduced side. Even after the gap 55b in the first area A1 and the gap 55b in the second area A2 are adjusted, the gap 55b in the first area A1 is narrower than the gap 55b in the second area A2.

As shown in FIG. 12, the guide mechanism 78 includes an arc-shaped guide groove 78a provided in the side plate 51a, and a guide pin 78b provided on the adjustment member 77 in a state where it is slidably inserted into the guide groove 78a. The guide pin 78b is formed by the support shaft of the chaflip plate 55aK that connects the chaflip plate 55aK located at the boundary 55K to the link member 76.

As shown in FIG. 11, the positioning mechanism 79 has a plurality of bolt holes 79a provided in the adjustment member 77 and a plurality of screw holes 79b provided in the side plate 51a.

In the positioning mechanism 79, as shown in Figures 12 and 13, a positioning bolt 81 is attached to one bolt hole 79a corresponding to the operating position of the adjustment member 77 and one screw hole 79b corresponding to the operating position of the adjustment member 77, so that the adjustment member 77 is connected to the side plate 51a by the positioning bolt 81 and the adjustment member 77 is positioned at the operating position.
By removing the positioning bolt 81 from the screw hole 79b, the connection of the adjustment member 77 to the side plate 51a by the positioning bolt 81 is released, and the positioning of the adjustment member 77 is released.

[Another embodiment]
(1) FIG. 14 is a cross-sectional view showing the rear part of the threshing drum 13 having another embodiment and the support structure of the rear part of the threshing drum having another embodiment.

In the handling drum 13 showing another embodiment, the rear support member 31 is provided with a reinforcing plate 37 that is overlapped and welded to the center of the rear support member 31. A bent portion 38 is formed in the rear support member 31 at a portion that is radially outward of the handling drum from the reinforcing plate 37. The bent portion 38 is formed in a state where it is connected in a ring shape. A reinforcing tube 48 is fitted onto the rear of the handling drum support shaft 25.

In another embodiment of the support structure for the rear of the handling drum, an extension shaft 47 is provided at the rear of the handling drum support shaft 25, protruding rearward from the handling drum support shaft 25, and the extension shaft 47 is supported on the rear wall 20 via a bearing 44 and a bearing case 45.

(2) Figure 15 is a cross-sectional view showing a threshing apparatus having a shaking sorting device according to another embodiment.
In the shaking separator 90 according to another embodiment, the front-rear length of the sieve case 51 is the same as that of the sieve case 51 of the shaking separator 50 shown in Figs. 2 and 10. A third grain pan 91 is provided between the grain pan 53 and the chaff sieve 55. A wind direction member 49 is provided in an area below the front of the third grain pan 91 and above the front of the second grain pan 57. The wind direction member 49 is configured to direct the sorting wind blown into the sieve case 51 from the winnower 60 through the inlet 58 to between the rear of the first grain pan 53 and the front of the third grain pan 91, and above the second grain pan 57. The chaff sieve 55 is configured so that the gap 55b between the chaff flip plates 55a is the same over the entire length of the chaff sieve 55.

(3) In the above embodiment, the bent portions 38 are formed in a ring-shaped connection, but they may not be connected in a ring shape and may be arranged intermittently in the circumferential direction of the intermediate support member 27 or the rear support member 31.

(4) In the above embodiment, an example in which one intermediate support member 27 is provided between the front intermediate support member 27 and the rear support member 31 is shown, but this is not limited to this. There may be no other intermediate support member between the front intermediate support member 27 and the rear support member 31, or two or more intermediate support members may be provided between the front intermediate support member 27 and the rear support member 31.

(5) In the above embodiment, an example is shown in which the reinforcing plate 37 is welded to the front side of the intermediate support member 27 and the bent portion 38 is bent toward the rear side, but this is not limited to the above. For example, the reinforcing plate 37 may be welded to the front side of the intermediate support member 27 and the bent portion 38 is bent toward the front side, or the reinforcing plate 37 may be welded to the rear side of the intermediate support member 27 and the bent portion 38 is bent toward the front side, or the reinforcing plate 37 may be welded to the rear side of the intermediate support member 27 and the bent portion 38 is bent toward the rear side.

(6) In the above embodiment, an example was shown in which the extension shafts 43 and 47 were provided, but the extension shafts 43 and 47 may not be provided and the handling drum shaft 25 may be supported directly on the rear wall 20.

(7) In the above embodiment, examples are shown in which a handling drum 13 having a rear support member 31 without a reinforcing plate 37 and a curved portion 38 and an extended support shaft 43, and a handling drum 13 having a rear support member 31 with a reinforcing plate 37 and a curved portion 38 and an extended support shaft 47 are used, but this is not limited to this. It is possible to use a handling drum 13 having a rear support member 31 without a reinforcing plate 37 and a curved portion 38 and an extended support shaft 47, or a handling drum 13 having a rear support member 31 with a reinforcing plate 37 and a curved portion 38 and an extended support shaft 43.

(8) In the above embodiment, an example was shown in which the recess 13A was provided, but the recess 13A may not be provided.

The present invention can be applied to a threshing device equipped with a threshing chamber into which the entire harvested crop is fed and a threshing drum rotatably mounted in the threshing chamber.

13 Threshing drum 13A Sweeping portion 14 Handling chamber 25 Threshing drum support shaft 27 Intermediate support member 28 Base portion 29 Spiral blade 31 Rear support member 32 Threshing tooth support member 33 Threshing tooth 37 Reinforcing plate 38 Bent portion 43 Extension support shaft 43a Shaft portion 43b Connecting portion

Claims (7)

A handling room where the whole harvested crop is placed;
A rotatable threshing drum is provided in the threshing chamber,
The handling drum is provided with a handling drum support shaft rotatably disposed in the handling chamber in a position along the front-rear direction of the handling chamber, a plate-shaped intermediate support member supported at an intermediate portion in the axial direction of the handling drum support shaft, a rear support member supported on the handling drum support shaft rearward of the intermediate support member, a plurality of rod-shaped handling tooth support members supported by the intermediate support member and the rear support member with gaps in the circumferential direction of the handling drum, and a plurality of rod-shaped handling teeth supported by the handling tooth support member in each of the plurality of handling tooth support members, the handling teeth protruding from the handling tooth support member toward the radial outside of the handling drum and with gaps in the direction along the handling drum support shaft,
The intermediate support member is provided with a reinforcing plate that is overlapped and welded to a central portion of the intermediate support member, and a bent portion that is formed in the intermediate support member on a radially outer side of the reinforcing plate ,
the intermediate support member is provided with a support member mounting hole through which the throttling cylinder support shaft is inserted, the intermediate support member is attached to the throttling cylinder support shaft through the support member mounting hole, and is welded to the throttling cylinder support shaft around the support member mounting hole;
The reinforcing plate of the threshing device has a reinforcing plate mounting hole through which the threshing drum support shaft is inserted, and is attached to the threshing drum support shaft through the reinforcing plate mounting hole, and is welded to the threshing drum support shaft around the reinforcing plate mounting hole . The threshing device according to claim 1, wherein the bent portion is connected in a ring shape. The threshing device according to claim 1 or 2, wherein the bent portion is bent toward the side opposite to the side on which the reinforcing plate is provided. The threshing device according to claim 3, wherein the reinforcing plate is provided on the front side of the intermediate support member. A raking section is provided that is supported on the front part of the threshing body support shaft and raks the crops put into the threshing chamber toward the rear part of the threshing body,
A threshing device as described in any one of claims 1 to 4, wherein the raking section is provided with a base section supported by the intermediate support member, and a spiral blade provided on the outer periphery of the base section so as to protrude from the outer periphery of the base section toward the outside of the base section, and which raks the crops toward the rear of the threshing drum. The threshing device according to any one of claims 1 to 5, wherein the rear support member is provided with a reinforcing plate welded to the center of the rear support member, and a bent portion formed in the rear support member outside the reinforcing plate in the radial direction of the threshing drum. An extension shaft is provided that protrudes rearward from the rear support member, extends the handling drum support shaft rearward, and is rotatably supported on the rear wall of the handling chamber.
the extension shaft includes a shaft portion supported by the rear wall and a connecting portion connected to the shaft portion and the rear support member to attach the shaft portion to the rear support member;
A threshing device as described in any one of claims 1 to 6, wherein the connecting portion is connected to the shaft portion by integral formation with the shaft portion, and is configured as a hollow structure that widens toward the support member side, with an outer diameter that is larger toward the rear support member side.

Images