JP7413167B2 - harvester - Google Patents

Description

The present invention relates to a harvester that threshes all culms of harvested crops.

As disclosed in Patent Document 1, a harvesting machine that threshes the entire culm of a harvested crop is used, in which crops in a field are harvested by a harvesting section, transported rearward by a conveyance device, and transported to the rear of the conveyance device. Some devices are configured such that crops are introduced from the inlet of the threshing device toward the handling chamber by means of a rotary member provided therein.

In Patent Document 1, a raking part having a spiral blade is provided at the front part of the handling drum, and a guide part is provided extending from the rear end of the bottom of the conveying device to the front end of the receiving net.
With this, when the rotating member of the conveyance device feeds the crops from the entrance of the threshing device toward the handling chamber, the spiral blades of the raking section scrape the crops into the handling chamber as the handling drum rotates. The crops are guided to the handling room along the guide section.

Japanese Patent Application Publication No. 2015-146802

When crops are introduced from the entrance of the threshing device by the rotating member of the conveyance device, if there is a delay in handling the crops by the raking section, the crops may remain near the entrance of the threshing device. There is a demand for a structure that allows the handling of crops to be carried out with less delay.

An object of the present invention is to provide a harvesting machine that threshes all the culms of harvested crops so that the raking section handles the crops with less delay.

The harvesting machine of the present invention includes a harvesting section that is provided at the front of the machine body and that harvests crops in a field, a conveyance device that conveys the crops harvested by the harvesting section rearward, and the crops that are conveyed by the conveyance device. a threshing device for receiving and threshing the grains, the threshing device is provided with a handling chamber into which the crops from the conveying device are input, and the handling chamber is provided so as to be rotatable around a front-rear axis along a front-rear direction. A handling drum for threshing the crops inputted into the handling chamber, and a receiving net provided around the lower part of the handling drum, and a receiving net provided at the front part of the handling drum for rotation of the handling drum. A scraping part having a spiral blade for scraping the crops into the handling chamber is provided at the rear of the conveying device so as to be rotatable around a left-right axis along the left-right direction, and is rotationally driven. a rotating member for feeding crops from the entrance of the threshing device to the handling chamber by passing the crop through the lower side with respect to the left and right axis ; a rear end of the bottom of the conveying device; and a front end of the receiving net; and a guide section for guiding the crop introduced by the rotating member to the handling chamber, and the left and right axes are disposed at a position lower than the receiving net when viewed from the side.

According to the present invention, the left and right axes of the rotating member of the conveying device are disposed at a position lower than the receiving net in side view, so that the rotating member and the guide section of the conveying device are disposed at a lower position.
As a result, when the rotating member of the conveyance device feeds the crops from the entrance of the threshing device, the crops are moved from below the raking section along a direction close to orthogonal to the front-rear axis of the handling cylinder, as seen from the side. , it will be in a state where it is thrown toward the bottom surface of the scraping part. When the crops are inputted in this way, the crops enter between the adjacent spiral blades of the raking part with little delay.

The spiral blade of the raking section rakes the crop so as to push the crop backward with the rear surface of the spiral blade as the handling barrel rotates.
As in the present invention, when the crop easily gets between the adjacent spiral blades of the raking part, the crop is pushed by the rear surface of the spiral blade of the raking part without being delayed backwards, and the crop is pushed into the raking part. This will result in fewer delays in the handling of crops.
According to the present invention, the handling of crops by the raking section can be carried out with less delay, and it is possible to reduce the accumulation of crops near the entrance of the threshing device, thereby improving the harvesting performance of the harvester. can.

The harvesting machine of the present invention includes a harvesting section that is provided at the front of the machine body and that harvests crops in a field, a conveyance device that conveys the crops harvested by the harvesting section rearward, and the crops that are conveyed by the conveyance device. a threshing device for receiving and threshing the grains, the threshing device is provided with a handling chamber into which the crops from the conveying device are input, and the handling chamber is provided so as to be rotatable around a front-rear axis along a front-rear direction. A handling drum for threshing the crops inputted into the handling chamber, and a receiving net provided around the lower part of the handling drum, and a receiving net provided at the front part of the handling drum for rotation of the handling drum. A scraping part having a spiral blade for scraping the crops into the handling chamber is provided at the rear of the conveying device so as to be rotatable around a left-right axis along the left-right direction, and is rotationally driven. a rotating member for feeding crops from the entrance of the threshing device to the handling chamber by passing the crop through the lower side with respect to the left and right axis ; a rear end of the bottom of the conveying device; and a front end of the receiving net; and a guide section that guides the crops inputted by the rotating member to the handling chamber, and the left and right axes are located at a position lower than the lower end of the rotation locus of the spiral blade when viewed from the side. It is located in

According to the present invention, the left and right axes of the rotating member of the conveying device are disposed at a position lower than the lower end of the rotation locus of the spiral blade of the scraping section when viewed from the side. is placed in a low position.
As a result, when the rotating member of the conveyance device feeds the crops from the entrance of the threshing device, the crops are moved from below the raking section along a direction close to orthogonal to the front-rear axis of the handling cylinder, as seen from the side. , it will be in a state where it is thrown toward the bottom surface of the scraping part. When the crops are inputted in this way, the crops enter between the adjacent spiral blades of the raking part with little delay.

The spiral blade of the raking section rakes the crop so as to push the crop backward with the rear surface of the spiral blade as the handling barrel rotates.
As in the present invention, when the crop easily gets between the adjacent spiral blades of the raking part, the crop is pushed by the rear surface of the spiral blade of the raking part without being delayed backwards, and the crop is pushed into the raking part. This will result in fewer delays in the handling of crops.
According to the present invention, the handling of crops by the raking section can be carried out with less delay, and it is possible to reduce the accumulation of crops near the entrance of the threshing device, thereby improving the harvesting performance of the harvester. can.

In the present invention, the scraping part is provided with a cylindrical base part centered on the front-rear axis, and the spiral blade is provided on the outer periphery of the base part, and when viewed from the side, the guide part In an imaginary line extending forward along the horizontal direction from the rear end, a first vertical interval between the imaginary line and the front end of the guide section is such that the first vertical distance between the imaginary line and the front end of the base section It is preferable that the second vertical distance is set to be larger than the second vertical distance between the lower end of and the lower end of the second vertical distance.

In the scraping part, when a cylindrical base part centered on the front-rear axis is provided, and the spiral blade is provided on the outer periphery of the base part, according to the present invention, the front end of the guide part is located at a low position. The guide portion is arranged in a side view and is in a state where the guide portion is greatly inclined upward toward the rear.

As a result, according to the present invention, when the rotating member of the conveying device inputs the crop from the entrance of the threshing device, the crop is inputted from below the raking part toward the lower surface of the raking part as seen from the side, as described above. This state is assisted by the guide section, and it is possible to reduce the accumulation of crops near the entrance of the threshing device, thereby improving the harvesting performance of the harvester.

In the present invention, it is preferable that the lower end of the rotation trajectory of the spiral blade is located at a lower position than the upper end of the inlet of the threshing device.

According to the present invention, when the rotating member of the conveying device inputs the crop from the entrance of the threshing device, the input crop and the spiral blade of the raking section become closer in the vertical direction, so that the crop is not removed from the raking section. This makes it easier for the crop to get between the adjacent spiral blades, reducing the accumulation of crops near the entrance of the threshing device, and improving the harvesting performance of the harvester.

In the present invention, the threshing device includes a sorting section that is provided below the receiving net to sort out the processed material from the receiving net, and a sorting section that is provided below the guide section and supplies sorting air to the sorting section. It is preferable that the guide portion and the winnow case that accommodates the winnowing device are vertically adjacent to each other.

In a threshing device, a sorting section for sorting the processed material from the receiving net is provided below the receiving net, and a winnow that supplies sorting air to the sorting section is sometimes provided below the guide section.
According to the present invention, in the above-described configuration, the guide part and the winnow case that accommodates the winnowing part are arranged vertically adjacent to each other and close to each other, so that the rotating member and the guide part of the conveying device are lowered. It becomes easier to place the device in the correct position.

In the present invention, it is preferable that the width of the outlet of the conveying device connected to the inlet of the threshing device is set to be larger than or the same as the width of the handling drum.

According to the present invention, since the width of the outlet of the conveying device is large, when the rotating member of the conveying device inputs the crops from the entrance of the threshing device, the crops can be inputted without causing accumulation of the crops. Becomes exposed.

It is a side view of a combine. It is a longitudinal side view of the rear part of a threshing device and a conveyance device. It is a longitudinal side view of the front part of a threshing device, and the rear part of a conveyance device. FIG. 3 is a schematic plan view showing the transmission system of the conveyance device. It is a perspective view of a sending member. FIG. 3 is a longitudinal sectional front view of the sending member. FIG. 3 is a vertical side view of the feeding member. FIG. 3 is a longitudinal sectional front view of a transport case of the transport device. FIG. 3 is a front view of the vicinity of the entrance of the threshing device. It is a front view of the support frame arrange|positioned at the right part and the left part of the front part of a thresher. FIG. 3 is a vertical side view of the support portion. FIG. 3 is a vertical side view of the support portion. It is a front view of the vicinity of a guide part. It is a perspective view of a guide part. FIG. 3 is a longitudinal sectional side view of the front part of the threshing device and the rear part of the transporting device in a state where the mounting height of the transporting device to the threshing device is set at a high position. In a first alternative embodiment of the invention, it is a vertical side view of the front part of the threshing device and the rear part of the conveying device.

1 to 16 show an ordinary type combine harvester, which is an example of a harvesting machine, and in FIGS. 1 to 16, F indicates the front direction, B indicates the rear direction, and U indicates the upward direction. , D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

(Overall configuration of combine harvester)
As shown in FIG. 1, a fuselage 1 is supported by right and left crawler type traveling devices 2. A driving section 3 on which a worker rides is provided at the front right part of the machine body 1. A threshing device 4 is provided at the rear left part of the machine body 1, and a grain tank 5 is provided at the rear right part of the machine body 1.

A harvesting section 6 is provided at the front of the machine body 1, and a conveyance device 7 is connected to the rear of the harvesting section 6 and extends diagonally backward and upward, and the rear of the conveyance device 7 is connected to the left-right axis along the left-right direction. It is attached to the front part of the threshing device 4 so as to be movable up and down around the axis P1, which is the core. An elevating cylinder 8 is connected to the machine body 1 and the conveying device 7, and the elevating cylinder 8 supports the harvesting section 6 and the conveying device 7 so as to be movable up and down around the axis P1.

The harvesting section 6 is provided with a scraping reel 9, a clipper-like cutting device 10, and a transverse feed screw 11. As the machine body 1 moves forward, the crops in the field are raked in by the raking reel 9, the roots of the crops are cut and harvested by the cutting device 10, and the harvested crops are transferred to the harvesting section 6 by the transverse feeding screw 11. They are collected at the left and right center sides of and supplied to the conveying device 7.

The crops supplied from the harvesting section 6 to the conveying device 7 are conveyed rearward by the conveying device 7, and all the culms of the crops conveyed by the conveying device 7 are thrown into the threshing device 4. The threshing device 4 threshes the crops, and the grains collected by the threshing device 4 are stored in a grain tank 5.

(Conveyance device configuration)
As shown in FIG. 1, the transport device 7 is provided with a transport case 12, a transport mechanism 13, and a feed member 14 as a rotating member.

As shown in FIGS. 2, 3, and 4, the transport case 12 is made of plate material and has a rectangular tube shape. It is set up over .

As shown in FIG. 8, an opening 12c extending between a right part 12a and a left part 12b of the transport case 12 is formed on the upper surface of the rear part of the transport case 12 (the upper surface above the feed member 14 and sprocket 16, which will be described later). has been done.

A removable top plate member 33 is provided on the top surface of the transport case 12 with bolts 34 . An opening 33 a is opened in the top plate member 33 , and a lid member 33 b that closes the opening 33 a can be attached to and removed from the top plate member 33 with a nut 64 .

By attaching the top plate member 33 to the right side 12a and the left side 12b of the transport case 12 with bolts 34, the opening 12c of the transport case 12 is closed by the top plate member 33. By removing the top plate member 33, the opening 12c of the transport case 12 is opened (the upper surface of the transport case 12 is opened across the right part 12a and the left part 12b of the transport case 12).

As shown in FIGS. 1 to 4, the conveyance mechanism 13 includes right and left sprockets 15 at the front, right and left sprockets 16 at the rear, and a right sprocket installed along the front-rear direction across the sprockets 15 and 16. A large number of conveyance bodies 18 are provided along the left and right conveyance chains 17 and the right and left conveyance chains 17. It is provided across the rear.

The feed member 14 is provided inside the transfer case 12 on the rear side of the rear end portion (sprocket 16) of the transfer mechanism 13. As shown in FIGS. 5, 6, and 7, three (plural) flat plate-shaped blade members 19 are provided, and the outer side portion 9a of the blade member 19 is slightly bent. The blade members 19 are combined so that a space 14a having a triangular cross section along the left-right direction is formed at the center of the sending member 14, and extends outward from the space 14a of the sending member 14 in the radial direction. The blade members 19 are combined in this way.

As shown in FIGS. 4, 6, and 7, a drive shaft 20 having a hexagonal cross section is rotatably supported concentrically with the axis P1 (see FIG. 1). The feed member 14 is provided with a boss member 21 having a hexagonal opening, and the boss member 21 is attached to the space 14a of the feed member 14 with bolts 62.

As shown in FIGS. 3, 4, and 9, ring-shaped right and left cover members 63 are attached to the inner surfaces of the right part 12a and left part 12b of the transport case 12. As shown in FIGS. The right and left ends of the feed member 14 are inserted into the cover member 63, and the crop is wrapped around the drive shaft 20 between the right portion 12a (left portion 12b) of the transport case 12 and the feed member 14. This prevents a situation where it would stick.

By inserting the drive shaft 20 into the opening of the boss member 21, the drive shaft 20 and the blade member 19 are rotated together with the drive shaft 20 passing through the space 14a of the feeding member 14. The boss member 21 is now attached over the outer surface of the drive shaft 20 and the blade member 19. As a result, the feed member 14 is attached to the drive shaft 20, and the drive shaft 20 and the blade member 19 (the feed member 14) can rotate together.

(Drive configuration of conveyance device)
As shown in FIGS. 2, 3, 4, and 9, a transmission shaft 23 is supported along the left-right direction at the front of the threshing device 4, and is powered by an engine 22 (see FIG. 1) mounted on the machine body 1. is transmitted to a pulley 23a connected to the left side of the transmission shaft 23.

As shown in FIGS. 4 and 9, a pulley 23b is connected to the left side of the transmission shaft 23, a pulley 20a is connected to the left side of the drive shaft 20, and the pulley 23b of the transmission shaft 23 and the pulley 20a of the drive shaft 20 A transmission belt 24 is attached throughout. A tension pulley 25 that can be operated to press and separate from the transmission belt 24 is provided, and a reaping clutch 26 having the transmission belt 24 and the tension pulley 25 is provided.

A sprocket 20b is connected to the right side of the drive shaft 20, and a sprocket 27a is connected to a drive shaft 27 that supports the sprocket 16 in the transport mechanism 13. A transmission chain 28 serving as a transmission mechanism is attached throughout.

With the above configuration, the power of the engine 22 is transmitted to the drive shaft 20 via the transmission shaft 23 and the reaping clutch 26, and the drive shaft 20 is rotationally driven in the counterclockwise direction in FIGS. , the feed member 14 is rotationally driven by the drive shaft 20 in the counterclockwise direction in FIGS. 1, 2, and 3 around the axis P1.

The power of the drive shaft 20 is transmitted to the drive shaft 27 via the transmission chain 28 and then to the transport mechanism 13, and the transport mechanism 13 (sprockets 15, 16, transport chain 17, and transport body 18) It is rotated counterclockwise in FIGS. 1, 2, and 3 along the front-rear direction of the transport case 12.

A sprocket 27b is connected to the drive shaft 27, and the power of the drive shaft 27 is transmitted from the sprocket 27b of the drive shaft 27 to the harvesting section 6 (raking reel 9, cutting device 10, and traverse screw 11). When the reaping clutch 26 is operated to the disconnected state, the conveying device 7 (the conveying mechanism 13 and the feeding member 14) and the harvesting section 6 (the scraping reel 9, the cutting device 10, and the traversing screw 11) are stopped.

In this case, the sprocket 27a of the drive shaft 27 is configured to have a larger diameter than the sprocket 20b of the drive shaft 20, and the power of the drive shaft 20 is decelerated by the transmission chain 28 and transmitted to the drive shaft 27 (transport mechanism 13). be done. Thereby, the transport mechanism 13 is rotationally driven at a lower speed than the feeding member 14. In other words, the feed member 14 is driven to rotate at a higher speed than the transport mechanism 13.

As shown in the above-mentioned (overall structure of combine harvester) and FIGS. 1, 2, and 3, the crops harvested by the harvesting section 6 and supplied to the conveyance device 7 are transferred to the conveyance case 12 by rotationally driving the conveyance mechanism 13. The transport case 12 is transported rearward in a substantially straight line along the bottom of the transport case 12 from the front end to the rear thereof.

When the crop reaches the rear end (sprocket 16) of the conveyance mechanism 13, the crop is transferred from the conveyance mechanism 13 to the feed member 14 along the bottom of the conveyance case 12, and the feed member 14 transfers the crop to the outlet 7a of the conveyance device 7. The grains are fed into the entrance 57 of the threshing device 4 (see (configuration of guide section) described later) from the (rear end of the transport case 12).

(Configuration of reversing mechanism)
As shown in (Structure of threshing device) and FIGS. 4 and 9, which will be described later, the threshing device 4 is provided with a handling cylinder 44, and a bevel gear 50a connected to a drive shaft 50 of the handling cylinder 44 and a bevel gear 50a connected to a transmission shaft 23. The handle barrel 44 is rotated by the power of the transmission shaft 23.

The transmission shaft 29 is supported concentrically with the transmission shaft 23, and the bevel gear 29a connected to the transmission shaft 29 meshes with the bevel gear 50a of the drive shaft 50, so that the power of the transmission shaft 23 is transferred to the drive shaft 50. The power for reverse rotation is transmitted to the transmission shaft 29 via the bevel gear 50a.

A pulley 29b is connected to the right side of the transmission shaft 29, and a pulley 20c is connected to the right side of the drive shaft 20. is installed. A tension pulley 31 that can be operated to press and separate from the transmission belt 30 is provided, and a reversal clutch 32 as a reversal mechanism having the transmission belt 30 and the tension pulley 31 is provided.

The reverse clutch 32 is normally operated in a disconnected state. When the harvesting section 6 or the conveyance device 7 is clogged with crops, the reaping clutch 26 is operated to the disconnected state, and the reversing clutch 32 is temporarily operated to the transmission state.

When the reverse clutch 32 is operated to the transmission state, the power of the reverse rotation of the transmission shaft 29 is transmitted to the drive shaft 20 via the reverse clutch 32, and the conveying mechanism 13 and the feeding member 14 of the conveying device 7 are moved in the opposite direction. The scraping reel 9 and the transverse feed screw 11 of the harvesting section 6 are driven to rotate in opposite directions. This eliminates clogging of the harvesting section 6 and the transport device 7 with crops.

If the crop is clogged at the rear of the transport device 7, the operator can remove the top plate member 33 from the opening 12c of the transport case 12 by removing the top plate member 33 shown in the above (Construction of the transport device) and FIG. You can remove stuck crops.
By removing the top plate member 33 while the rear of the conveyance device 7 is not clogged with crops, replacement work and maintenance work on the feed member 14, the sprocket 16 of the conveyance mechanism 13, etc. can be performed.

(Configuration of attachment to threshing device in conveyance device)
As shown in FIG. 9, support frames 35 are provided along the vertical direction on the right and left parts of the front part of the threshing device 4, and right and left support parts 36 are connected to the support frames 35. There is. The right and left parts of the drive shaft 20 (see the above-mentioned (Construction of Conveyance Device) (Drive Configuration of Conveyance Device) and FIG. 4) are supported by a support portion 36.

As shown in FIGS. 9, 11, and 12, the support portion 36 is provided with a boss portion 36a, a connecting portion 36b, a reinforcing rib 36c, a receiving portion 36d, an opening portion 36e, and the like. In the support portion 36, a boss portion 36a is connected to the upper and lower intermediate portions of the flat connecting portion 36b. A reinforcing rib 36c is connected to the boss part 36a and the upper and lower parts of the connecting part 36b, and a receiving part 36d is connected to the lower end of the connecting part 36b and the reinforcing rib 36c. Four openings 36e extending in the vertical direction are opened at the upper and lower portions of the connecting portion 36b.

As shown in FIGS. 10, 11, and 12, four openings 35a and four openings 35b are opened in the support frame 35 so as to be lined up in the vertical direction, and the openings 35a, 35b Four openings 35c are opened on both sides. Four bolts 37 are attached to the opening 35c of the support frame 35, and the bolts 37 are inserted into the opening 36e of the support part 36.

In the state shown in FIGS. 9 to 12, the bolt 37 is located at the upper end of the opening 36e of the support section 36, the bolt 37 is tightened, and the four bolts 38 are connected to the connection section 36b of the support section 36 and It is in a state where it is inserted into the opening 35a of the support frame 35 and tightened.

In the states shown in FIGS. 2, 3, and 9, the mounting height of the conveying device 7 to the threshing device 4 is set at a low position, and the support portion 36 is connected to the support frame 35 by eight bolts 37, 38. ing.

The right part (left part) of the drive shaft 20 is rotatably supported by the boss part 36a, and the drive shaft 20 is supported by the support part 36 concentrically with the axis P1, and the harvesting part 6 and the conveyance device 7 is supported around the axis P1 (drive shaft 20) so that it can be moved up and down.

(Configuration of threshing device)
As shown in FIGS. 2 and 3, the threshing device 4 is provided with a handling chamber 43, a handling drum 44, a receiving net 45, a sorting section 46, a winnow 47, and the like.

The handling cylinder 44 is supported in the handling chamber 43 so as to be rotatable around an axis P2 which is a front-rear axis along the front-rear direction. A handling section 49 is provided at the rear of 44. As shown in FIG. 4, a drive shaft 50 is connected to the front part of the handling barrel 44, and a bevel gear 50a of the drive shaft 50 meshes with a bevel gear 23c of the transmission shaft 23. 44 is rotated clockwise in FIG.

As shown in FIGS. 2 and 3, in the scraping part 48 of the handling cylinder 44, a conical cylindrical base part 48a centered on the axis P2 is provided, and a spiral blade 48b is attached to the base part 48a. It is provided on the outer periphery.

In the handling section 49 of the handling barrel 44, a plurality of round pipe-shaped rod members 49a are arranged along the circumferential direction centering on the axis P2 and extend along the front-rear direction. A number of handling teeth 49b are attached to rod member 49a and extend radially outward.

With the above configuration, the entire culm of the crop transported by the transport device 7 is scraped into the handling chamber 43 by the spiral blades 48b of the scraping section 48 as the handling cylinder 44 rotates. , the crops are threshed by the handling section 49 of the handling barrel 44.

The receiving net 45 is constructed of elongated plates and rods in a lattice shape, has a semi-cylindrical shape as a whole, and is provided around the lower part of the handling barrel 44 .
A sorting section 46 is provided below the receiving net 45, and the sorting section 46 is provided with a grain pan 51, a chaff sieve 52, a straw rack 53, a grain sieve 54, a first item collection section 55, and a second item collection section 56. .

A winnower 47 is provided in front of the sorting section 46, and sorting air is supplied from the winnower 47 to the sorting section 46. In the sorting section 46, the processed material from the receiving net 45 is sorted, and the grains collected in the first grain collection section 55 are transported to the grain tank 5 and stored therein. The collected processed material is returned to the handling chamber 43.

(Configuration of guide section)
As shown in FIGS. 2, 3, and 9, between the right and left support frames 35, the entrance 57 of the threshing device 4 is formed in a horizontally long rectangular shape (rectangular shape) when viewed from the front.

The guide part 58 is provided below the scraping part 48 of the handling cylinder 44 when viewed from the side, and the guide part 58 is provided at the rear end (transport It is provided across the lower side of the outlet 7a of the device 7 (lower side 57a of the inlet 57 of the threshing device 4) and the front end of the receiving net 45.

As shown in FIGS. 13 and 14, the guide portion 58 includes a left and right center portion 58a that is triangular in plan view and front view, and a right lateral portion 58b and a left lateral portion 58c that are triangular in front and side view. The left and right center portions 58a extend obliquely upward and rearward in side view. The upper side part of the right lateral part 58b and the upper side part of the left lateral part 58c are formed in an arc shape so as to follow the rotation locus of the spiral blade 48b of the scraping part 48 when viewed from the front.

(Configuration of guiding part)
As shown in FIGS. 13 and 14, a bulge is formed toward the left and right center portion 58a of the guide portion 58 at the connection portion between the left and right center portions 58a and the right lateral portions 58b, which are the right corners of the guide portion 58. A guide portion 59 is provided. The right corner of the guide portion 58 is located on the lower side in the rotational direction of the handling cylinder 44 (raking portion 48).

The upper end portion 59a of the guiding portion 59 is formed in an inclined shape so as to follow the rotation locus of the spiral blade 48b of the scraping portion 48 and the upper side of the right lateral portion 58b of the guiding portion 58, when viewed from the front, The upper end portion 59a of the guiding portion 59 is disposed close to the rotation locus of the spiral blade 48b of the scraping portion 48 and the upper side of the right lateral portion 58b of the guiding portion 58.

In a plan view, the handling cylinder 44 ( A guide surface 59b is provided that is inclined with respect to the axis P2 of the scraping portion 48). The upper surface part 59c of the guiding part 59 is formed in an inclined state that becomes higher toward the rear closer to the handling chamber 43 when viewed from the side.

(Configuration near the entrance of the threshing device)
As shown in FIGS. 2 and 3, a winnowing machine 47 (see the above-mentioned configuration of the threshing device) is provided in front of the sorting section 46 and below the guide section 58. The guide portion 58 and the winnow case 60 that accommodate the winnow 47 are vertically adjacent to each other.
As shown in FIG. 9, the width W3 of the outlet 7a of the conveying device 7 connected to the inlet 57 of the threshing device 4 is set to be larger than the width W4 of the handling cylinder 44.

As shown in FIGS. 2 and 3, the lower end of the receiving net 45 and the rear end of the guide portion 58 are located at the same height in side view. In this case, a virtual line A1 is assumed to extend forward along the horizontal direction from the lower end of the receiving net 45 (the rear end of the guide portion 58) when viewed from the side.

The axial center P1 of the feeding member 14 of the conveying device 7 is arranged at a lower position than the virtual line A1 when viewed from the side, and the axial center P1 of the feeding member 14 of the conveying device 7 is located at a lower position than the receiving net 45 when viewed from the side. is located at a lower position. The axis P1 of the feeding member 14 of the conveying device 7 is arranged at a position lower than the rotation locus of the spiral blade 48b of the scraping part 48 in side view.

In a side view, the first vertical distance W1 between the imaginary line A1 and the front end of the guide section 58 is the second vertical distance between the imaginary line A1 and the lower end of the front end of the base section 48a of the scratching section 48. It is set larger than the vertical interval W2.
The lower end of the rotation locus of the spiral blade 48b of the raking part 48 is located at a lower position than the upper end 57b of the inlet 57 of the threshing device 4 in side view.

(Flow of crops from conveyance device to threshing device)
As shown in the above-mentioned (driving structure of the conveyance device) and FIGS. 2, 3, and 4, the crops harvested by the harvesting section 6 are transferred from the front end of the conveyance case 12 to the rear by the conveyance mechanism 13 in the conveyance device 7. The grains are transported rearward along the bottom of the transport case 12 in a substantially straight line, and are fed into the inlet 57 of the threshing device 4 from the outlet 7a of the transport device 7 (the rear end of the transport case 12) by the transport member 14. The grains are thrown diagonally upward and rearward from the inlet 57 of the threshing device 4 toward the handling chamber 43.

The crops input into the entrance 57 of the threshing device 4 are transported along the guide section 58, from below the raking section 48, in a direction close to the direction perpendicular to the axis P2 of the handling cylinder 44, as seen from the side. It will be in a state where it is thrown toward the lower surface of the scraping part 48.

When the crops are introduced as described above, the crops tend to enter between the adjacent spiral blades 48b of the raking section 48, and the crops are directed toward the handling chamber 43 by the guide section 58. While guided by the rotation of the handling cylinder 44, it is scraped into the handling chamber 43 so as to be pushed rearward by the rear surface of the spiral blade 48b of the scraping part 48.

In this case, as shown in FIGS. 13 and 14, due to the rotation of the handling cylinder 44 (raking part 48), the crops tend to flow to the lower side in the rotation direction of the raking part 48, and to the right of the guide part 58. It is thought that it tends to stay in the corners. Since the right corner of the guide section 58 is far from the spiral blade 48b of the scraping section 48, it is considered that it is difficult for the spiral blade 48b of the scraping section 48 to reach it.

Since the guiding part 59 is provided at the right corner of the guiding part 58, the presence of the guiding part 59 reduces the portion that is difficult for the spiral blades 48b of the scraping part 48 to reach. It becomes easier for the blades 48b to reach the crops.

When the crop is raked into the handling chamber 43 by the spiral blade 48b of the raking section 48, the crop is guided toward the left-right center portion 58a of the guide section 58 by the guide surface 59b of the guide section 59; The crop is smoothly raked into the handling chamber 43 by the spiral blades 48b of the raking section 48 due to the point where the crop flows toward the handling chamber 43 along the upper surface 59c of the guide section 59.

(Composition of lifting mechanism)
As shown in FIGS. 9, 11 and 12, right and left lifting mechanisms 42 are provided below the right and left support parts 36 described in the above (Configuration of attachment to threshing device in conveyance device). There is.

A support plate 39 is connected to a portion of the support frame 35 below the support part 36, a nut 40 is attached to the support plate 39, and a bolt 41 is inserted into the nut 40. In this way, the elevating mechanism 42 includes the support plate 39, nuts 40, bolts 41, and the like.

As described below, the mounting height of the conveying device 7 to the threshing device 4 can be changed from a low position to a high position.
As shown in FIGS. 9 to 12, by removing the four bolts 38 and slightly loosening the four bolts 37, the support part 36 can be moved along the support frame 35 while maintaining the state in which it does not separate from the support frame 35. so that it can be moved upward.

In the above state, the bolt 41 is rotated and the upper end of the bolt 41 pushes up the receiving part 36d of the support part 36. When the support part 36 is pushed up and the bolt 37 reaches the lower end of the opening 36e of the support part 36, the bolt 37 is tightened and the four bolts 38 that were removed are connected to the connection part 36b of the support part 36 and Insert into the opening 35b of the support frame 35 and tighten.

Thereby, the mounting height of the conveying device 7 to the threshing device 4 is set to a high position. When changing the mounting height of the conveying device 7 to the threshing device 4 from a high position to a low position, the same operation as described above can be performed, and the bolt 41 is rotated in the opposite direction to lower the support part 36. That's fine.

As described above, the mounting height of the conveying device 7 to the threshing device 4 is adjusted so that the position of the crop exit 7a of the conveying device 7 is changed along the vertical direction with respect to the crop inlet 57 of the threshing device 4. An elevating mechanism 42 whose height can be changed is provided.

(Condition near the entrance of the threshing device when the mounting height of the conveyor to the threshing device is set to a high position)
As described in (Configuration of Lifting Mechanism) above, when the mounting height of the conveyor 7 to the threshing device 4 is set to a high position, the lower side member 61 having a channel-shaped cross section is connected to the entrance 57 of the threshing device 4. By attaching the lower side member 61 to the lower side 57a of the threshing device 4, the lower side member 61 may be used as the lower side 57a of the inlet 57 of the threshing device 4. Thereby, the height of the lower side portion 57a of the inlet 57 of the threshing device 4 can be changed by attaching and detaching the lower side member 61.

If the mounting height of the conveying device 7 to the threshing device 4 is set to a high position, the guide portion 58 may be replaced with another guide portion 58 in the same way, and the height of the front end of the guide portion 58 may be changed. can be changed.

As shown in FIG. 15, when the mounting height of the transport device 7 to the threshing device 4 is set to a high position, the transport device 7 (transport case 12) The rear end of the bottom (lower side of the outlet 7a of the conveying device 7), the lower side 57a of the inlet 57 of the threshing device 4 (lower side member 61), and the front end of the guide portion 58 are connected continuously with few steps. It can be configured to connect.

Even when the mounting height of the conveying device 7 to the threshing device 4 is set to a high position, the axis P1 of the feeding member 14 of the conveying device 7 is lower than the imaginary line A1 (see FIG. 3) in side view. The axis P1 of the feeding member 14 of the conveying device 7 is located at a lower position than the receiving net 45 in side view. The axis P1 of the feeding member 14 of the conveying device 7 is arranged at a position lower than the rotation locus of the spiral blade 48b of the scraping part 48 in side view.

(First alternative embodiment of the invention)
As shown in FIG. 16, in the conveyance device 7, the feed member 14 (see FIGS. 2 and 3) may be removed from the drive shaft 20, and the sprocket 16 of the conveyance mechanism 13 may be attached to the drive shaft 20. Thereby, in the conveyance device 7, the feed member 14 is removed and the rear end portion of the conveyance mechanism 13 can be switched to a state where it is attached to the drive shaft 20.
In this configuration, the sprocket 16 of the transport mechanism 13 and the transport body 18 serve as rotating members provided at the rear of the transport device 7.

(Second alternative embodiment of the invention)
In the handling barrel 44, the base portion 48a of the scraping portion 48 may be configured to have a cylindrical shape having the same radius in the front-rear direction instead of a conical cylindrical shape.
In the handling cylinder 44, as shown in FIGS. 2 and 3, the boundary between the raking part 48 and the handling part 49 is on the rear side of the front end of the receiving net 45 (inward of the handling chamber 43). ), the boundary between the raking section 48 and the handling section 49 may be arranged at the same position as the front end of the receiving net 45 in side view.

(Third alternative embodiment of the invention)
The width W3 of the outlet 7a of the conveying device 7 connected to the inlet 57 of the threshing device 4 and the width W4 of the handling cylinder 44 may be the same. The width W3 may be slightly smaller than the width W4.

The present invention can be applied to a harvester that feeds the entire culm of a harvested crop into a threshing device.

1 Machine body 4 Threshing device 6 Harvesting section 7 Conveying device 7a Exit 14 Feeding member (rotating member)
43 Handling chamber 44 Handling barrel 48 Scraping part 45 Receiving net 46 Sorting part 47 Winnow 48a Base part 48b Spiral blade 57 Entrance 57b Upper end 58 Guide part 60 Winnow case A1 Virtual line P1 Left and right axis P2 Front and back axis W1 1st Vertical interval W2 Second vertical interval W3 Width W4 Width

Claims (6)

A harvesting section that is installed at the front of the aircraft and harvests crops in the field;
a conveyance device that conveys the crops harvested by the harvesting section rearward;
A threshing device that receives and threshes the crops transported by the transport device,
The threshing device is provided with a handling chamber into which the crops from the conveying device are input, and a handling chamber rotatable around a front-rear axis along the front-rear direction, for threshing the crops input into the handling chamber. and a catch net provided around the lower part of the handling cylinder,
A raking part having a spiral blade for raking the crops into the handling chamber as the handling cylinder rotates is provided in the front part of the handling cylinder,
It is provided at the rear of the conveying device so as to be rotatable around the left-right axis along the left-right direction, and is rotationally driven to pass the crop below the left-right axis and from the entrance of the threshing device. a rotating member to be thrown toward the handling chamber;
a guide part provided across the rear end of the bottom of the conveyance device and the front end of the receiving net, and guides the crops introduced by the rotating member to the handling chamber;
The harvester wherein the left and right axes are located at a position lower than the receiving net when viewed from the side. A harvesting section that is installed at the front of the aircraft and harvests crops in the field;
a conveyance device that conveys the crops harvested by the harvesting section rearward;
A threshing device that receives and threshes the crops transported by the transport device,
The threshing device is provided with a handling chamber into which the crops from the conveying device are input, and a handling chamber rotatable around a front-rear axis along the front-rear direction, for threshing the crops input into the handling chamber. and a catch net provided around the lower part of the handling cylinder,
A raking part having a spiral blade for raking the crops into the handling chamber as the handling cylinder rotates is provided in the front part of the handling cylinder,
It is provided at the rear of the conveying device so as to be rotatable around the left-right axis along the left-right direction, and is rotationally driven to pass the crop below the left-right axis and from the entrance of the threshing device. a rotating member to be thrown toward the handling chamber;
a guide part provided across the rear end of the bottom of the conveyance device and the front end of the receiving net, and guides the crops introduced by the rotating member to the handling chamber;
The harvester wherein the left and right axes are located at a position lower than a lower end of a rotation locus of the spiral blade when viewed from the side. The scraping part is provided with a cylindrical base part centered on the front and rear axis, and the spiral blade is provided on the outer peripheral part of the base part,
In an imaginary line extending forward along the horizontal direction from the rear end of the guide part in side view, a first vertical interval between the imaginary line and the front end of the guide part is different from the imaginary line. The harvester according to claim 1 or 2, wherein the second vertical distance between the front end portion of the base portion and the lower end portion is set to be larger. The harvester according to any one of claims 1 to 3, wherein a lower end of the rotation locus of the spiral blade is located at a lower position than an upper end of the inlet of the threshing device. The threshing device includes a sorting section that is provided below the receiving net to sort out the processed material from the receiving net, and a winnow that is provided below the guide section and supplies sorting air to the sorting section. provided,
The harvesting machine according to any one of claims 1 to 4, wherein the guide portion and the winnow case that accommodates the winnow are vertically adjacent to each other. 6. The width of the outlet of the conveying device connected to the inlet of the threshing device is set to be larger than or the same as the width of the handling drum. harvesting machine.

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