JP2021023122A - combine - Google Patents

Abstract

To discharge grains in a state that grain deposition height in a grain tank is not very unhomogeneous in a combine equipped with a grain tank for storing grains obtained by a thresher and a bottom screw provided in the bottom part of the grain tank for discharging the grains from the grain tank.SOLUTION: A levelling device 60 is provided in the upper part of a grain tank 12. The levelling device 60 achieves levelling of grain deposition by dispersing grains in a direction along a grain transfer direction of a bottom screw 20.SELECTED DRAWING: Figure 6

Description

The present invention is provided over a threshing device for threshing the harvested product harvested by the harvesting unit, a threshing tank for storing the grains threshed by the threshing device, and the threshing device and the grain tank. The present invention relates to a combine equipped with a transport device for supplying the grains obtained by the threshing device to the grain tank.

Some of the above-mentioned combines are provided in the bottom of the grain tank and provided with a bottom screw for discharging grains from the grain tank.
As a combine of this kind, for example, there is one shown in Patent Document 1. The combine shown in Patent Document 1 is provided with a grain raising device as a transport device and a discharge screw as a bottom screw.

Japanese Unexamined Patent Publication No. 2014-14341

When the bottom screw ejects grains from the grain tank, the bottom screw sends out the grains that have entered between the screw blades, so that the grains located on the upstream side of the bottom screw are on the downstream side of the bottom screw. It decreases before the grains located in the part. As a result, when the grain accumulation height in the tank becomes non-uniform due to the grain discharge by the bottom screw, for example, the grain accumulation height in the part where the sensor for detecting the amount of grain storage is located is the other part. There are problems such as the grain height in the part where the sensor is located is lower than in other parts, and appropriate detection information cannot be obtained.

The present invention provides a combine that discharges grains by a bottom screw, but can discharge grains in a state where the height of the grain deposits is not so uneven.

The combine according to the present invention
A grain removing device for degraining the harvested product harvested by the harvesting unit, a grain tank for storing the grains degrained by the degraining device, and the grain removing device and the grain tank are provided to provide the degraining. A transport device for supplying the grains obtained by the device to the grain tank, a bottom screw provided in the bottom of the grain tank for discharging grains from the grain tank, and the inside of the grain tank. A leveling device is provided at the upper part of the above surface, in which grains are dispersed in a direction along the grain transfer direction of the bottom screw to level the grain accumulation.

According to this configuration, when the grains are stored in the grain tank, the grains can be stored in a state where the accumulated height of the grains is made uniform by the leveling device, and the grains can be discharged in this stored state. Compared to discharging grains in a storage state where the deposit height is uneven, the grains are discharged by the bottom screw, but the grain height is not so uneven. it can.

In the present invention
The leveling device is provided above the bottom screw over a portion corresponding to an upstream end portion of the bottom screw and a portion corresponding to a downstream end portion of the bottom screw. A screw is preferable.

According to this configuration, since the leveling device can be obtained with a simple structure in which a leveling screw is provided, a product that can be discharged in a state where the grain deposition height is not so uneven can be obtained at low cost.

In the present invention
The transport end side portion of the transport device is inserted into the inside of the grain tank, and the discharge portion of the transport end side portion is a portion above the intermediate portion of the bottom screw in the grain transfer direction. The grains are configured to be scraped off by a rotary blade and discharged, and the spiral of the screw blade in the portion of the leveling screw located on one end side of the leveling screw with respect to the portion corresponding to the discharge portion. It is preferable that the direction and the spiral direction of the screw blade at the portion located on the other end side of the leveling screw with respect to the portion corresponding to the discharge portion are different.

According to this configuration, the grain can be supplied to the grain tank by a simple supply structure in which the end side of the transport is simply inserted into the grain tank, and a leveling screw is provided and leveling is performed. Structure that only makes the spiral direction of the screw blades different on one end side and the other end side of the screw A simple leveling means can discharge grains without the grain deposition height becoming very uneven, which is inexpensive. I'm done.

In the present invention
It is preferable that a power transmission mechanism for branching the power of the transport device and transmitting the power to the leveling device is provided.

According to this configuration, the leveling device can be driven by a simple power transmission mechanism having a transport device as a power source, and the cost is low.

In the present invention
The first transporting unit connected to the threshing apparatus and transporting the grains obtained by the threshing apparatus and the first transporting unit are stretched in a direction different from the transporting direction of the first transporting unit to deliver the grains. A second transport unit that supplies the grain tank and a power relay unit that transmits the power of the first transport unit to the second transport unit are provided, and the power transmission mechanism transfers the power of the transport device to the second transport unit. It is preferable to branch from the power relay unit and transmit it to the leveling device.

According to this configuration, the transfer device can be used as the power source of the leveling device by a power transmission mechanism having a simpler structure than branching the power from the power relay unit, and it is cheaper.

In the present invention
The power relay unit and the input unit of the leveling device are provided on the lateral side of the grain tank, and the power transmission mechanism is provided on the lateral side of the grain tank. It is preferable that it is provided along the lateral side wall.

According to this configuration, the power transmission mechanism and the grain tank are provided in a compact state close to each other.

It is a right side view which shows the whole of the ordinary type combine. It is a left side view which shows the whole of the ordinary type combine. It is a top view which shows the whole of the ordinary type combine. It is a side view of a grain tank and a transport device. It is a longitudinal side view of a grain tank. It is a cross-sectional plan view of a grain tank. It is a rear view which shows the leveling apparatus. It is a cross-sectional plan view of the discharge part. It is a vertical sectional view of a discharge part. It is a top view which shows the connection structure of the bottom screw and the screw of a grain discharge device. It is a side view which shows the connection structure of the bottom screw and the screw of a grain discharge device. It is sectional drawing of XII-XII of FIG. It is a cross-sectional view of XIII-XIII of FIG. It is a longitudinal side view which shows the connection structure of the 1st transport part and a screw conveyor. It is a vertical sectional rear view of a relay case and a screw conveyor. FIG. 15 is a cross-sectional view taken along the line XVI-XVI of FIG. It is a perspective view of a relay case. It is sectional drawing which shows the screw blade of a leveling screw.

Hereinafter, embodiments that are an example of the present invention will be described with reference to the drawings.
In the following description, with respect to the traveling aircraft of the normal type combine, the direction of the arrow F shown in FIGS. 1, 2 and 3 is "front of the aircraft", the direction of the arrow B is "rear of the aircraft", and FIGS. The direction of the arrow U shown is "upward of the aircraft", the direction of the arrow D is "downward of the aircraft", the direction of the arrow L shown in FIG. 3 is "left of the aircraft", and the direction of the arrow R is "right of the aircraft". ..

As shown in FIGS. 1, 2 and 3, a traveling machine body of a normal type combine has a body frame 1 formed by connecting a plurality of steel materials such as a square pipe material. A pair of left and right front wheels 2 are operably equipped on the front portion of the fuselage frame 1. A pair of left and right rear wheels 3 are steerably equipped at the rear of the fuselage frame 1. A driver unit 6 having a steering wheel 5 for steering the driver's seat 4 and the rear wheels 3 is formed at the front portion of the traveling machine body. The driver unit 6 is provided with a cabin 7 that covers the boarding space. A harvest transfer device 8 is connected to the front portion of the traveling machine body. The harvesting and transporting device 8 is connected to a harvesting unit 8A for harvesting rice, wheat and other crops in front of the traveling machine by the harvesting device 9 and a harvesting unit 8A connected to the rear of the harvesting unit 8A. A feeder 8B for transporting to the rear is provided. The harvest transfer device 8 is moved up and down in a lowering working posture and a rising non-working posture by a vertical swing operation of the feeder 8B by the expansion and contraction operation of the lifting cylinder 10 connected to the feeder 8B. The rear part of the machine frame 1 is equipped with a threshing device 11 that threshes the harvested product conveyed by the feeder 8B and sorts the grains obtained by threshing from dust. Above the front portion of the threshing device 11, a grain tank 12 for storing the grains obtained by the threshing device 11 is provided. As shown in FIG. 7, an inspection window 13 that allows the inside of the tank to be seen through from the outside of the tank is provided on the wall of the grain tank 12 on the operation side. The inspection window 13 is provided so as to be openable and closable by a slide. The grain is supplied to the grain tank 12 by a transport device 14 provided across the threshing device 11 and the grain tank 12. The transport device 14 is covered from the lateral side by an upper side cover 15 and a lower side cover 16 provided on the right lateral side portion of the traveling machine body. A grain discharge device 17 for taking out grains from the grain tank 12 is connected to the left lateral side of the grain tank 12. A driving part 19 having an engine 18 is formed behind the grain tank 12.

[About the configuration to take out grains from the grain tank]
As shown in FIGS. 1, 5 and 6, a bottom screw 20 is rotatably provided in the bottom of the grain tank 12. The bottom screw 20 is provided so as to extend over the entire width of the grain tank 12 and in the width direction of the machine body. As shown in FIGS. 4 and 12, a drive pulley 25c is provided at the end of the screw shaft 20a of the bottom screw 20. The bottom screw 20 is driven by the drive pulley 25c being driven by the power from the engine 18. As shown in FIGS. 2 and 6, a connection case 21 for connecting the transport start end of the grain discharge device 17 and the transport end of the bottom screw 20 is provided between the grain discharge device 17 and the grain tank 12. It is provided. The connection case 21 is rotatably supported by the wall of the grain tank 12. The grain discharge device 17 is rocked with the rotation axis of the connection case 21 as a swing fulcrum, so that the grain discharge device 17 has a usage posture protruding to the left lateral outside of the traveling machine and a lateral outer side of the grain tank 12. It swings over the retracted posture located along the front-rear direction of the aircraft.

The grain discharge device 17 is composed of a screw conveyor. As shown in FIGS. 10 and 11, the bottom screw 20 and the screw 17a of the grain discharge device 17 are connected via a connecting screw 22. The screw shaft 25 is connected to the connecting screw 22 to the screw shaft 20a of the bottom screw 20 via the first universal joint 23, and is connected to the screw shaft 17b of the grain discharge device 17 via the second universal joint 24. And, the screw shaft 25 is provided with a screw blade 22a that is supported so as not to rotate relative to each other. The screw shaft 25 has a first screw shaft portion 25a having a first universal joint 23 and a second screw shaft portion 25b having a second universal joint 24. The first screw shaft portion 25a and the second screw shaft portion 25b are formed by inserting the spline shaft portion provided in the first screw shaft portion 25a into the spline hole provided in the second screw shaft portion 25b. It is connected so that it can be expanded and contracted and cannot rotate relative to it. The expansion and contraction of the first screw shaft portion 25a and the second screw shaft portion 25b enables the expansion and contraction of the screw shaft 25 when the grain discharge device 17 swings. The screw blade 22a is supported by the second screw shaft portion 25b so as to be relatively non-rotatable via a tubular member 26 that is fitted onto the second screw shaft portion 25b so as to be relatively non-rotatable. When connecting the first screw shaft portion 25a and the second screw shaft portion 25b, the phase matching mark 27 for matching the phases of the first screw shaft portion 25a and the second screw shaft portion 25b is the first screw shaft portion. It is provided on the spline shaft portion of 25a and the second screw shaft portion 25b. The end portion of the tubular member 26 is formed in an oblique cut shape so that the phase matching mark 27 is exposed so that it can be easily seen. The connection case 21 is configured so that the rotation axis of the connection case 21 is located near the bending / extension point X of the first universal joint 23, and even if the grain discharge device 17 swings, the screw of the bottom screw 20 The blade 20b and the screw blade 22a of the connecting screw 22 are not so separated from each other.

When taking out grains from the grain tank 12, the grain discharging device 17 is set to the working posture and the bottom screw 20 is driven. The connecting screw 22 is driven by the power of the bottom screw 20, and the power of the bottom screw 20 is transmitted to the screw shaft 17b of the grain discharging device 17 via the connecting screw 22 to drive the screw 17a of the grain discharging device 17. .. The grains transferred from the inside of the grain tank 12 to the connecting case 21 by the bottom screw 20 are supplied to the grain discharging device 17 by the connecting screw 22 and conveyed by the grain discharging device 17, and are conveyed on the left lateral outer side of the traveling machine body. , Grains are discharged from the discharge cylinder 17c (see FIG. 2) of the grain discharge device 17. Since the screw blade 20b of the bottom screw 20 and the screw blade 22a of the connecting screw 22 are not so far apart, even if a large amount of grains are taken out from the grain tank 12 by the bottom screw 20, the grain discharging device 17 is provided by the connecting screw 22. Is smoothly supplied to the discharge cylinder 17c and is smoothly discharged from the discharge cylinder 17c.

As shown in FIGS. 5 and 6, a guide member 28 having a mountain-shaped vertical cross section is provided above the bottom screw 20. As shown in FIGS. 4 and 12, a guide that reciprocates the rotary support shaft 28a of the guide member 28 by the power of the bottom screw 20 over the rotary support shaft 28a of the guide member 28 and the screw shaft 20a of the bottom screw 20. A drive mechanism 29 is provided. When the grains are taken out from the grain tank 12, the guide member 28 is reciprocally rocked by the guide drive mechanism 29, and the guide member 28 guides the grains so as to smoothly descend to the bottom screw 20.

[Regarding the composition of supplying grains to the grain tank]
As shown in FIG. 4, the bottom of the threshing device 11 is provided with a first screw 11a for discharging the grains after the sorting process to the right lateral outside of the threshing device 11. In the transport device 14, the transport end portion is connected to the first transport portion 30 in which the transport start end is connected to the transport end of the first screw 11a as the grain discharge portion of the threshing device 11, and the transport end is connected to the grain tank 12. It also has a second transport unit 40. The second transport unit 40 is extended in a direction different from the transport direction of the first transport unit 30. The transport end portion of the first transport unit 30 and the transport start end portion of the second transport unit 40 are connected by a relay case 50. As shown in FIG. 14, the second transport unit 40 is configured by a screw conveyor. In the following description of the transfer device 14, the second transfer unit 40 will be referred to as a screw conveyor 40.

[About the first transport unit]
As shown in FIG. 4, the first transport unit 30 includes a transport case 31 extending upward from the transport end portion of the screw 11a. The lower end of the transport case 31 is most communicated with the transport end of the screw 11a. As shown in FIG. 14, the upper end portion 31a of the transport case 31 is communicated with the insertion port 51 of the relay case 50. As shown in FIGS. 4 and 14, the drive sprocket 32 is rotatably provided in the lower end portion of the transport case 31, and the driven sprocket 33 is rotatably provided in the upper end portion of the transport case 31. An endless chain 34 is wound around the drive sprocket 32 and the driven sprocket 33. The carrier 35 (slat) is supported at a plurality of locations in the longitudinal direction of the endless chain 34.

The first conveyor 30 is a so-called slat conveyor. In the first transport unit 30, the drive sprocket 32 is driven by the power of the first screw 11a, the endless chain 34 is driven by the drive sprocket 32, and each transport body 35 is ascended and transferred along the transport path 36 by the endless chain 34. It is transferred down the return path 37. The grains supplied into the lower end of the transport case 31 by the first screw 11a of the threshing device 11 are lifted by the transport body 35 through the transport path 36. The grains transported into the upper end of the transport case 31 are thrown into the input port 51 of the relay case 50 by the transport body 35 that moves from the transport path 36 to the return path 37, and are supplied to the relay case 50.

[About the relay case]
As shown in FIGS. 14, 15, 16 and 18, the relay case 50 has a loading case portion 50A provided with a loading port 51 and a supply case portion 50B provided with a through hole 52. As shown in FIGS. 14, 15 and 17, the input port 51 is provided in a portion of the peripheral wall 55 of the relay case 50 facing the transport end portion of the first transport portion 30. The upper edge 51a of the loading port 51 is formed by a bent end portion 53a of the top plate portion 53 of the loading case portion 50A. As shown in FIGS. 14, 15 and 16, the relay case 50 is supported by the first transport unit 30 in a state where the input port 51 communicates with the transport end portion of the first transport unit 30. The grains charged into the charging port 51 flow into the charging case section 50A, and flow from the loading case section 50A into the supply case section 50B. The lower portion 41a of the screw blade 41 of the screw conveyor 40 is inserted into the supply case portion 50B through the through hole 52. The grains charged into the relay case 50 are supplied to the screw conveyor 40 by the supply case portion 50B.

As shown in FIGS. 14, 15, 16 and 17, the supply case portion 50B is provided in a state of being displaced toward the lateral end side of the charging port 51 with respect to the charging port 51. The bottom portion 54 of the relay case 50 is provided at a position lower than the lower end 51b of the input port 51. A space S in which grains can be collected is formed between the input port 51 and the screw blade 41. Even if a large amount of grains are thrown into the relay case 50 from the first transport unit 30, they are accumulated in the space S.

As shown in FIGS. 14 and 15, the screw blade 41 of the screw conveyor 40 extends to the bottom 54 of the relay case 50. The feed pitch P1 in the lower portion 41a of the screw blade 41 is set to be smaller than the feed pitch P2 in the upper portion 41b. At the bottom of the screw conveyor 40, screw blades 41 are arranged at narrow intervals. In the present embodiment, the feed pitch P1 in the lower portion 41a is set to about 1/2 of the feed pitch P2 in the upper portion 41b. In the present embodiment, the screw blade 41 in the lower portion 41a and the screw blade 41 in the upper portion are each made into a single helix, and the feed pitch P1 of the lower portion 41a is made smaller than the feed pitch P2 of the upper portion 41b. Instead, the screw blade 41 in the lower portion 41a may be double-helixed, the screw blade 41 in the upper portion may be double-helixed, and the feed pitch P1 in the lower portion 41a may be smaller than the feed pitch P2 in the upper portion 41b. The portion of the screw blade 41 having a small feed pitch P1 is extended from the bottom portion 54 to a position higher than the boundary K between the supply case portion 50B and the transport cylinder 42 of the screw conveyor 40. The screw blades 41 of the screw conveyor 40 are driven in the rotational direction indicated by the arrow A in FIG. 16 in a plan view. As shown in FIG. 16, the relay case 50 has a distance between a portion 55a of the peripheral wall 55 of the relay case 50 located opposite to the insertion port 51 side with respect to the screw blade 41 and the outer peripheral portion of the screw blade 41. W1 is configured to be wider than the distance W2 between the portion 55b located on the insertion port 51 side of the peripheral wall 55 with respect to the screw blade 41 and the outer peripheral portion of the screw blade 41. As shown in FIG. 16, a gap E is provided between the peripheral wall 55 and the outer peripheral portion of the screw blade 41. As shown in FIG. 16, the gap E faces the end portion 51d of the insertion port 51 on the lower side in the screw blade rotation direction from the portion E1 facing the end portion 51c on the lower side in the screw blade rotation direction. It is provided so as to become smaller toward the portion E2. As shown in FIG. 15, in the supply case portion 50B, a step 56 in which the transport cylinder 42 is displaced inward of the transport cylinder 42 with respect to the peripheral wall 55 is formed between the peripheral wall 55 and the transport cylinder 42 of the screw conveyor 40. It is formed.

In the relay case 50, the grains introduced from the first transport unit 30 into the input port 51 flow into the portion where the interval W1 is located through the space S, and are inherited by the screw blade 41 at this portion and are inherited by the screw conveyor 40. Will be carried by. Even if a large amount of grains are thrown into the relay case 50 from the first transport unit 30, they are accumulated in the portion where the space S is located and the portion where the interval W1 is located. Since the bottom portion 54 is lower than the lower end 51b of the input port 51, a large amount of the bottom portion 54 is accumulated. The accumulated grains are subdivided into screw blades 41 arranged at narrow intervals at the lower part of the screw conveyor 40, inherited and conveyed, and the grains are conveyed without being clogged. When the grains are conveyed in the supply case portion 50B, they are firmly guided by the peripheral wall 55 of the supply case portion 50B whose distance from the screw blades 41 becomes narrower toward the lower side in the conveying direction, and are smoothly conveyed. When the grain exceeds the step 56, it is firmly guided by the transport cylinder 42 located inside the screw conveyor 40 with respect to the peripheral wall 55 and is smoothly conveyed.

[About the screw conveyor (second conveyor)]
As shown in FIGS. 4, 5 and 6, the transport end side portion 40A of the screw conveyor 40 (corresponding to the transport end side portion of the transport device 14) is connected to the inside of the grain tank 12. Specifically, the transport terminal side portion 40A is inserted into the inside of the grain tank 12 through a through hole provided in the bottom wall of the grain tank 12. Insertion of the transport end side portion 40A into the grain tank 12 is performed in a state where the transport end side portion 40A intersects the bottom screw 20 in a plan view. The transport terminal side portion 40A is supported by the wall of the grain tank 12 via the support member 43.

A discharge portion 44 is provided at the tip end portion of the transport end side portion 40A. As shown in FIGS. 8 and 9, the discharge portions 44 are rotatably provided inside the discharge openings 45 and the discharge openings 45, which are opened at three locations in the circumferential direction of the conveyor cylinder 42 of the screw conveyor 40. It has a number of rotary blades 46. The two rotary blades 46 are supported by the screw shaft 47 so as not to rotate relative to each other, and are rotated by the screw shaft 47 with the screw shaft core Z as the center of rotation. The discharge unit 44 scrapes the grains with the rotary blades 46 at a position above the intermediate portion of the bottom screw 20 in the grain transfer direction, and discharges the grains from the three discharge openings 45.

[Regarding the storage of grains in the grain tank]
As shown in FIGS. 5 and 6, the grains accumulated inside the grain tank 12 are dispersed in the upper portion of the grain tank 12 in the direction along the grain transfer direction of the bottom screw 20 to deposit the grains. A leveling screw 60 is provided as a leveling device for leveling. The discharge unit 44 is provided with a control unit 70 that controls the amount of grains discharged from the discharge unit 44 and regulates the discharge of the grains to the bottom screw 20 by the discharge unit 44. The control unit 70 is provided with a direction regulating member 72 that regulates the scattering direction of the grains discharged from the discharging unit 44.

When the grains are deposited up to the height of the discharge portion 44, the screw conveyor 40 is clogged with grains, and the screw conveyor 40 cannot supply the grains. When it becomes impossible to supply grains by the screw conveyor 40, grains are supplied to this empty space even if there is still an empty space in the grain tank outside the discharge portion 44 to accommodate the grains. Although it cannot be done, due to the leveling of the grain accumulation by the leveling screw 60, the control of the emission amount by the control unit 70, the regulation of the emission by the control unit 70, and the regulation of the grain scattering direction by the direction control member 72. A large amount of grains can be stored in the grain tank 12 at a leveled deposit height.

Specifically, as shown in FIGS. 5, 6 and 7, the leveling screw 60 is provided above the bottom screw 20 and below the discharge portion 44. The leveling screw 60 is provided over a portion corresponding to the downstream end portion of the bottom screw 20 and a portion corresponding to the upstream end portion of the bottom screw 20. The leveling screw 60 includes a screw shaft 61 extending over all subs of the grain tank 12. A screw blade 62 is provided in a portion of the screw shaft 61 located on the left end side of the leveling screw 60 with respect to a portion corresponding to the discharge portion 44 so as to be relatively non-rotatable. A screw blade 63 is provided in a portion of the screw shaft 61 located on the right end side of the leveling screw 60 with respect to a portion corresponding to the discharge portion 44 so as to be relatively non-rotatable. The screw blade 62 on the left end side is located on the downstream side of the bottom screw 20 with respect to the screw blade 63 on the right end side. The screw blade 63 on the right end side is located on the upstream side of the bottom screw 20 with respect to the screw blade 62 on the left end side. The screw blades 62 on the left end side are provided at three locations in the longitudinal direction of the screw shaft 61, and the screw blades 63 on the right end side are provided at only one location on the screw shaft 61. The spiral direction of the screw blade 62 on the left end side portion and the spiral direction of the screw blade 63 on the right end side portion are set in different directions. Below the discharge section 44, the grains are dispersed by the leveling screw 60 in the direction along the grain transfer direction of the bottom screw 20.

As shown in FIG. 18, the screw blade 62 on the left end side has a support cylinder 64 to which the screw blade 62 is connected, the support cylinder 64 is fitted onto the screw shaft 61, and the support cylinder 64 and the screw shaft 61 By mounting the mounting bolt 65 on the screw shaft 61, it is supported by the screw shaft 61 so as not to rotate relative to the screw shaft 61. The mounting bolt 65 is mounted so as to be hidden behind the screw blade 62 so that it is difficult to touch the grains. Bolt holes 66 for mounting the mounting bolts 65 are provided at a plurality of locations on the screw shaft 61. By replacing the mounting bolts 65 with the bolt holes 66 at a plurality of locations, the mounting positions of the screw blades 62 on the screw shaft 61 can be changed. The screw blade 63 on the right end side is supported by the screw shaft 61 by the same mounting structure as the mounting structure of the screw blade 62 on the left end side.

In the present embodiment, as shown in FIGS. 6 and 7, the spiral direction of the screw blade 62 on the left end side is set to the spiral direction for transferring the grain to the left, and the screw blade 63 on the right end side is the grain. Is set in a spiral direction to transfer to the right. In the leveling screw 60, the grains located on the left side with respect to the discharging portion 44 are dispersed in the left lateral direction, and the grains located on the right side with respect to the discharging portion 44 are dispersed in the right lateral direction.

In the present embodiment, the screw blades 62 on the left end side are provided at three locations on the screw shaft 61, and the screw blades 63 on the right end side are provided at only one location on the screw shaft 61, but the present invention is not limited to this. For example, when the discharge portion 44 is located to the left in the lateral width direction of the grain tank 12, it is preferable that the number of screw blades 62 installed on the left end side portion is smaller than the set number of screw blades 63 on the right end side portion. The number of screw blades 63 installed on the right end side portion and the number of screw blades 62 installed on the left end side portion may be any number corresponding to the position of the discharge portion 44. In the present embodiment, the spiral direction of the screw blade 62 on the left end side is set to the leftward transfer direction, and the spiral direction of the screw blade 63 on the right end side is set to the rightward transfer direction, but the present invention is not limited to this. For example, when a large amount of grains are discharged to a portion near the left end or a portion near the right end of the grain tank 12, the spiral direction of the screw blade 62 on the left end side is set to the rightward transfer direction, and the screw on the right end side is set. It is preferable to set the spiral direction of the blade 63 to the leftward transfer direction. The spiral direction of the screw blades 62 and 63 is set according to the state of grain accumulation, and may be set in any direction.

The control unit 70 is provided in the discharge unit 44 as shown in FIGS. 5 and 6. The control unit 70 regulates the discharge of grains to the bottom screw 20 by the discharge unit 44, and controls the amount of grains discharged to the front or rear of the discharge unit 44.

Specifically, as shown in FIGS. 5, 6 and 8, the control unit 70 alternately has three discharge openings 45 and three discharge control walls 73 in the discharge unit 44 in the circumferential direction of the discharge unit 44. It is arranged and provided, and is configured by making the sizes of the three emission control walls 73 different in the circumferential direction of the emission portion. In the present embodiment, as shown in FIG. 8, in the directional view along the screw axis Z of the screw conveyor 40, of the three discharge control walls 73, the first discharge control wall 73a located below the discharge portion 44 The size of the second discharge control wall 73b located on one of the upper left and right sides of the discharge unit 44 is W1, and the size of the third discharge control wall 73c located on the upper left and right side of the discharge unit 44 is W2. Assuming that the size is W3, the size W1> the size W3> the size W2 are set.

The control of the control unit 70 with respect to the discharge amount of the discharge unit 44 and the regulation of the control unit 70 with respect to the discharge of the discharge unit 44 are such that the discharge amount from the discharge portion of the discharge unit 44 facing the bottom screw 20 is the discharge unit. Of the 44, the discharge amount of the discharge portion 44 toward the upstream side portion of the bottom screw 20 is smaller than the discharge amount from the discharge portion other than the discharge portion facing the bottom screw 20. It is carried out so as to be larger than the discharge amount of the discharge part 44 toward the downstream side portion of the above. Further, the control unit 70 controls the discharge amount so that the discharge amount of the discharge unit 44 directed to the left rear of the discharge unit 44 is larger than the discharge amount of the discharge unit 44 directed to the left front of the discharge unit 44. In addition, the amount of discharge of the discharge unit 44 toward the right front of the discharge unit 44 is larger than the amount of discharge of the discharge unit 44 toward the right rear of the discharge unit 44. The discharge amount is further controlled by the control unit 70 so that the discharge amount in the portion facing the bottom screw 20 is smaller than the discharge amount facing the other portion.

As shown in FIGS. 5, 6 and 7, the direction regulating member 72 is supported by the support member 74 in an inclined posture located on the right side toward the front side in front of the discharge portion 44. The support member 74 is connected to the top plate 12t of the grain tank 12. Grains discharged from the discharge portion 44 and attempting to scatter toward the front of the bottom screw 20 hit the side surface of the direction regulating member 72 as the grain guide portion 72a and face the upstream portion of the bottom screw 20. It is guided by the direction regulating member 72.

As shown in FIGS. 5, 6 and 7, a light 80 (corresponding to an electrical component) that illuminates the inside of the grain tank 12 and a pair of upper and lower sensors 81 that detect the amount of grains stored (corresponding to electrical components) (Equivalent to electrical equipment) is provided. As shown in FIGS. 5 and 6, the upper sensor 81a of the light 80 and the pair of upper and lower sensors 81 is the back side of the grain guide portion 72a of the direction regulating member 72 in the wall of the grain tank 12. Region Y, that is, a portion where grains discharged from the discharge unit 44 and scattered toward the upper sensor 81a do not reach the light 80 and the upper sensor 81a by hitting the direction regulating member 72. Is located in. The light 80 and the upper sensor 81a are guarded by the direction regulating member 72 so as not to be hit by the grains scattered from the discharge unit 44.

[About power transmission to the leveling screw]
As shown in FIG. 4, a power transmission mechanism 85 is provided over the transfer device 14 and the leveling screw 60 to branch the power of the transfer device 14 and transmit the power to the leveling screw 60. The leveling screw 60 is driven by the transfer device 14 as a power source.

Specifically, as shown in FIG. 4, the power for transmitting the power of the first transport unit 30 to the screw conveyor 40 between the upper portion of the first transport unit 30 of the transport device 14 and the lower portion of the screw conveyor 40. A relay unit 86 is provided. The power relay unit 86 includes an output sprocket 87 provided on the rotary support shaft 33a of the driven sprocket 33 (see FIG. 14), a power transmission shaft 48 interlocked with the screw shaft 47 (see FIG. 14) of the screw conveyor 40, and power. It has an input sprocket 88 provided on the transmission shaft 48, an endless chain 89 wound around the output sprocket 87 and the input sprocket 88.

In the power relay unit 86, the power of the first transport unit 30 is taken out by the output sprocket 87 and transmitted from the output sprocket 87 to the screw shaft 47 via the endless chain 89, the input sprocket 88, and the power transmission shaft 48.

As shown in FIGS. 4 and 13, the power transmission mechanism 85 includes a power take-out sprocket 90 provided on the power transmission shaft 48, a first relay sprocket 92 supported by the relay shaft 91, and a power take-out sprocket 90 and a first relay. The first endless chain 93 wound around the sprocket 92, the second relay sprocket 94 supported by the relay shaft 91, the input sprocket 95 provided on the input shaft 67 of the leveling screw 60, and the second relay sprocket 94. It has a second endless chain 96 wound around an input sprocket 95. The input shaft 67 of the leveling screw 60 is interlocked with the screw shaft 61 in a separable state by a spline engagement 68.

In the power transmission mechanism 85, the power of the transfer device 14 is branched from the power transmission shaft 48 of the power relay unit 86 by the power take-out sprocket 90, and the power take-out sprocket 90 is branched from the power take-out sprocket 90 to the first endless chain 93, the first relay sprocket 92, and the relay shaft. It is transmitted to the input shaft 67 via 91, the second relay sprocket 94, the second endless chain 96, and the input sprocket 95.

As shown in FIGS. 4 and 13, each of the power relay unit 86 and the input shaft 67 as the input unit of the leveling screw 60 is laterally one side (right lateral side) with respect to the grain tank 12. The power transmission mechanism 85 is provided along the side wall portion 12a (right side wall) of the grain tank 12 on the lateral side.

[Another Embodiment]
(1) In the above embodiment, an example is shown in which the transport device 14 is provided on the right side of the grain tank 12 and the grain discharge device 17 is provided on the left side of the grain tank 12. Not limited to this, the transport device 14 may be provided on the left lateral side of the grain tank 12, and the grain discharge device 17 may be provided on the right lateral side of the grain tank 12.

(2) In the above embodiment, an example in which the first transport unit 30 is configured by a slat conveyor is shown, but the present invention is not limited to this. For example, it may be a bucket conveyor or a screw conveyor.

(3) In the above-described embodiment, an example in which the leveling screw 60 is adopted as the leveling device is shown, but the present invention is not limited to this. For example, a belt conveyor or the like may be adopted.

(4) In the above-described embodiment, an example is shown in which the power of the transport device 14 is branched and transmitted to the leveling screw 60, but the present invention is not limited to this. For example, a dedicated power transmission configuration for transmitting the power of the engine 18 to the leveling screw 60 may be adopted.

(5) In the above-described embodiment, an example is shown in which the transport terminal side portion 40A of the transport device 14 is inserted into the grain tank 12, but the present invention is not limited to this. For example, the transport terminal side portion 40A may be provided outside the grain tank 12, and the discharge portion may be opened to an inlet provided on the wall of the grain tank 12.

(6) In the above-described embodiment, the discharge unit 44 has three discharge openings 45, but the present invention is not limited to this, and the discharge unit 44 may have two or less or four or more discharge openings. Good.

(7) In the above-described embodiment, an example in which the control unit 70 is provided is shown, but the control unit 70 may not be provided.

(8) In the above-described embodiment, the control unit 70 is provided with the direction regulating member 72, but the control unit 70 may not be provided with the direction regulating member 72.

(9) In the above-described embodiment, the example in which the light 80 and the sensor 81 are provided is shown, but the light 80 and the sensor 81 may not be provided.

The present invention can be applied to a head-feeding combine equipped with a threshing device, a transport device, and a bottom screw. It can also be applied to a combine equipped with a crawler type traveling device.

8A Harvesting part 11 Threshing device 12 Grain tank 12a Side wall 14 Transporting device 20 Bottom screw 30 1st transporting section 40 2nd transporting section 40A Transporting end side 44 Discharge section 46 Rotating blade 60 Leveling device (leveling screw)
62 Screw blade 63 Screw blade 67 Input section (input shaft)
85 Power transmission mechanism 86 Power relay

Claims (6)

A threshing device that threshes the harvested crops harvested by the harvesting department,
A grain tank for storing the grains threshed by the threshing device, and
A transport device provided over the threshing device and the grain tank and supplying the grains obtained by the threshing device to the grain tank.
A bottom screw provided in the bottom of the grain tank to discharge grains from the grain tank,
A leveling device provided at the upper part inside the grain tank is provided to disperse the grains in the direction along the grain transfer direction of the bottom screw to level the grain accumulation. combine. The leveling device is provided above the bottom screw over a portion corresponding to the upstream end of the bottom screw and a portion corresponding to the downstream end of the bottom screw. The combine according to claim 1, which is a screw. The transport end side of the transport device is inserted into the grain tank.
The discharge portion on the end side of the transport is configured to scrape the grains with the rotary blades at a position above the intermediate portion of the bottom screw in the grain transfer direction and discharge the grains.
In the leveling screw, the spiral direction of the screw blade in the portion located on one end side of the leveling screw with respect to the portion corresponding to the discharge portion, and the leveling with respect to the portion corresponding to the discharge portion. The combine according to claim 2, wherein the spiral direction of the screw blade is different from that of the portion located on the other end side of the chemical screw. The combine according to any one of claims 1 to 3, further comprising a power transmission mechanism for branching the power of the transport device and transmitting the power to the leveling device. The first transporting unit connected to the threshing apparatus and transporting the grains obtained by the threshing apparatus and the first transporting unit are stretched in a direction different from the transporting direction of the first transporting unit to deliver the grains. A second transport unit that supplies the grain tank and a power relay unit that transmits the power of the first transport unit to the second transport unit are provided.
The combine according to claim 4, wherein the power transmission mechanism branches the power of the transfer device from the power relay unit and transmits the power to the leveling device. The power relay unit and the input unit of the leveling device are provided on the lateral side of the grain tank.
The combine according to claim 5, wherein the power transmission mechanism is provided along the lateral side wall of the grain tank.

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