JP2022173776A - Combine-harvester - Google Patents

Abstract

To address the desire of an operator to favorably perform removal work even when a removal object is present at any location in a grain discharger.SOLUTION: A combine-harvester includes a screw-type grain discharger 14 for discharging grains stored in a grain tank 10 to the outside of the combine-harvester, a bottom screw 15 provided at a lower end inside the grain tank 10 and rotating so as to convey the grains stored in the grain tank 10 to the grain discharger 14, a power transmission part 40 for transmitting power transmitted from an engine 13 to the bottom screw 15 to the grain discharger 14, and an operation tool 49 operating to a rotation part of the bottom screw 15 to be able to rotatingly operate the rotation part in an inverse direction of a rotation direction for conveyance by a manual operation.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a combine harvester provided with a grain tank for storing grain and a grain discharging device for discharging the grain stored in the grain tank to the outside of the machine.

The grain discharging device of a combine harvester consists of a vertical feeding section that conveys the grains sent outward from the bottom of the grain tank upwards, and a horizontal feeding section that conveys the grains from the upper end of the vertical feeding section. A transverse conveying section for discharging from the other end is provided. The vertical feed conveying section and the lateral feed conveying section are each composed of a screw conveyor that accommodates a spiral body inside a cylindrical conveying case and rotates the spiral body in a predetermined direction to convey grains. Conventionally, an opening for cleaning covered by an openable cover is formed in the middle of transportation in the transportation case (see, for example, Patent Document 1).

JP-A-2003-310039

In the above-described conventional configuration, when grains are being transported and clogging occurs during transportation, the lid can be switched to the open state to remove the clogged grains. In addition, after the discharge operation for discharging the grains in the grain tank is performed, the grains remaining inside the grain discharging device are removed in a state where the lid is opened and the opening is in an open state. Residues such as straw waste can be removed.

However, in the above-described conventional configuration, it is possible to access and remove objects to be removed such as clogged grains and residues at the locations where the openings are formed, but at locations away from the locations where the openings are formed. If there are objects to be removed in the opening, it is not possible to access them from the outside through the opening, so there is a disadvantage that the cleaning work cannot be carried out satisfactorily.

Therefore, it has been demanded to be able to carry out the removal work satisfactorily regardless of the position of the object to be removed in the grain discharging device.

The characteristic configuration of the combine according to the present invention includes an engine, a grain tank for storing grain, a screw type grain discharge device for discharging the grain stored in the grain tank to the outside of the machine, and the grain A bottom screw that is provided at the lower end inside the grain tank and rotates to convey the grains stored in the grain tank to the grain discharging device, and a power transmitted from the engine to the bottom screw. Acting on a power transmission part that transmits to the grain discharging device, and any rotating part of the bottom screw, the grain discharging device, and the power transmitting part, the rotating part is manually operated and a manipulator that can be rotated in a direction opposite to the direction of rotation for transportation.

According to the present invention, when the grains are being conveyed, the grains in the grain tank can be discharged when jamming occurs during the conveyance and hinders the grain discharge operation. After the completion of the work to remove the grains, if there is a residue of grains, straw waste, etc. to be removed inside the grain discharger, manually operate the operation tool to rotate the rotating part for transport. Rotate in the direction opposite to the direction of rotation. At this time, if the interlocking state in the transmission system from the engine to the grain discharging device is disconnected, the rotation operation can be easily performed.

As a result, for example, even if clogging occurs during transportation, the clogging is resolved by rotating in the opposite direction, and no matter where in the grain discharging device the object to be removed is staying, the clogging is resolved. , can be transferred to the upper side of the conveying side by being transferred in the opposite direction. Then, it is possible to take countermeasures such as ejecting the object to be removed from an opening formed during transportation.

Therefore, it has become possible to perform the removal work satisfactorily regardless of the position of the object to be removed in the grain discharging device.

In the present invention, it is preferable that the operating tool is detachable with respect to the rotating portion.

According to this configuration, when there is no object to be removed and the grain is being conveyed well, the operation tool is removed so that the operation of the grain discharging device is not hindered by the operation tool. .

In the present invention, the drive shaft of the bottom screw extends in a state of protruding outward from the grain tank, and the power transmission section transmits rotational power from the protruding portion of the drive shaft to rotate about the horizontal axis. It is configured to transmit power to the grain discharge device via a rotation state conversion part that converts power to rotational power around the vertical axis, and the operation tool is configured to be outside the drive shaft as the rotating part. It is preferred to act on the protruding portion.

According to this arrangement, the drive shaft of the bottom screw projects outwardly from the grain tank to transmit power from the bottom screw to the grain ejector. Therefore, by making effective use of this configuration, a configuration is adopted in which the operating tool acts on the outwardly protruding portion of the drive shaft. With this configuration, the drive shaft extends in the horizontal direction and is located at a low position below the grain tank, so that the manipulator is positioned at a position where it is easy for a person to operate it.

As a result, it is possible to attach the operating tool at a position where manual operation is easy without complicating the configuration, such as separately providing a dedicated shaft member for attaching the operating tool to the power transmission section.

In the present invention, the grain discharging device is interlocked with a vertical screw conveyor for conveying upward the grains delivered from the bottom screw, and the vertical screw conveyor and the relay transmission part are interlocked, and , and a horizontal screw conveyor that laterally conveys the grains delivered from the vertical screw conveyor, and the vertical screw conveyor and the horizontal screw conveyor are interlocked with the operation of the operating tool to rotate. It is possible, and it is preferable that the horizontal screw conveyor has a discharge opening at the start end of the conveyor, through which the residue can be discharged as the operating tool is operated.

The horizontal screw conveyor is positioned in a substantially horizontal posture on the upper part of the machine body in a non-operating state, and even if there is an object to be removed inside it, it will not spill out from the discharge port at the tip. Therefore, according to this configuration, the manipulating tool can be reversely rotated by operating the operating tool to transfer the residue back to the starting end side, and the residue can be discharged outward from the discharge port formed at the conveying starting end. .

In the present invention, it is preferable that an engaging portion for engaging and holding a collection container capable of receiving the residue discharged from the discharge port is provided at the conveying starting end portion of the horizontal screw conveyor.

According to this configuration, when the operation tool is operated while the collection container is locked and held by the locking portion, the residue discharged from the discharge port is received by the collection container, avoiding falling on the operator. be done.

It is the whole combine side view. It is a rear view of a grain tank and a grain discharging device. FIG. 2 is a cross-sectional view taken along line III-III of FIG. 1; It is a longitudinal side view of the base end part of a horizontal screw conveyor. It is an exploded perspective view of the base end of the horizontal screw conveyor.

An embodiment of the present invention will be described based on the drawings. In the following description, the direction of the arrow "F" is the "front side of the aircraft", the direction of the arrow "B" is the "rear side of the aircraft" (see FIG. 1), and the direction of the arrow "L" is the "left side of the aircraft". Let the direction of the arrow "R" be the "right side of the fuselage" (see FIG. 2).

〔overall structure〕
FIG. 1 shows a conventional combine. A traveling machine body of this combine is provided with a machine body frame 1 and a crawler traveling device 2. - 特許庁A harvesting section 3 for harvesting planted culms, which are crops in the field, is provided in front of the traveling machine body. The harvesting unit 3 includes a raking reel 4 for raking the planted grain culms, a cutting blade 5 for cutting the base of the planted grain culms, and a rearward feeder for collecting the harvested grain culms by laterally feeding them in the cutting width direction. and an auger 6 that feeds out to.

An operating section 7 is provided behind the harvesting section 3 . The operating part 7 is covered with a cabin 8 . A threshing device 9 for threshing all harvested culms and a grain tank 10 for storing grains obtained by threshing are provided side by side at the rear part of the machine body. The grain tank 10 is located behind the driving section 7 . A feeder 11 is provided across the harvesting section 3 and the threshing device 9 to convey all the culms of harvested grain toward the threshing device 9 . The driving unit 7 includes a driver's seat 12, an operation panel (not shown) having various operation members, and the like. An engine 13 as a power source is provided below the operating section 7 .

This combine harvests planted grain culms by the harvesting unit 3 as the machine body travels, and the harvested grain culms are conveyed to the threshing device 9 by the feeder 11 . In the threshing device 9, after the harvested culms are threshed, the threshed material is sorted into straw waste and grains, the straw waste is discharged backward, and the grains obtained by threshing are stored in the grain tank 10. and stored in the grain tank 10.

A grain discharging device 14 for discharging the grains stored in the grain tank 10 to the outside of the machine is provided. A bottom screw 15 is provided at the lower end inside the grain tank 10 to convey the grains stored in the grain tank 10 to the starting end of the grain discharging device 14 by rotating.

A vertical screw conveyor 16 that conveys upward the grains delivered from the bottom screw 15 to the grain discharge device 14, and the vertical screw conveyor 16 and the vertical screw conveyor 16 are interlocked via a relay transmission portion 17, and the vertical screw A horizontal screw conveyor 18 for laterally conveying grains delivered from the conveyor 16 is provided.

On the rear side of the rear wall portion 10a of the grain tank 10, there is provided a relay case 19 that covers the outside of the portion where the bottom screw 15 protrudes rearward and constitutes the starting end portion of the vertical screw conveyor 16. The internal space of this relay case 19 forms a transport path for transferring grains from the bottom screw 15 to the vertical screw conveyor 16 .

The vertical screw conveyor 16 is configured such that a spiral body 21 is housed inside a cylindrical transport case 20, and the grain is transported upward by rotating the spiral body 21 in a predetermined direction. The spiral body 21 has spiral blades 23 on the outer periphery of the drive shaft 22, and can feed and transfer the grains along the axial direction of the drive shaft 22 as it rotates.

As shown in FIG. 4, the horizontal screw conveyor 18 has a spiral body 25 housed inside a cylindrical transport case 24, and by rotating the spiral body 25 in a predetermined direction, grains transferred from the vertical screw conveyor 16 are transported. are configured to transport laterally. The spiral body 25 has spiral blades 27 on the outer periphery of the drive shaft 26, and can feed and transfer the grains along the axial direction of the drive shaft 26 as it rotates.

As shown in FIGS. 1, 2 and 4, the relay transmission section 17 extends from the upper end of the drive shaft 22 of the vertical screw conveyor 16 to a transmission chain (not shown) in a chain case 28 and a transmission shaft 30 in a cylindrical transmission case 29. (See FIG. 4) and a bevel gear mechanism 31 provided at the base end of the horizontal screw conveyor 18 to transmit power to the drive shaft 26 of the horizontal screw conveyor 18 .

The grain discharge device 14 is configured to be entirely rotatable around the rotation axis Y (vertical axis) of the drive shaft 22 of the vertical screw conveyor 16 . As shown in FIG. 3 , the lower end of the conveying case 20 of the vertical screw conveyor 16 is fitted into the upper cylindrical portion of the relay case 19 so as to be rotatable around the vertical axis Y. As shown in FIG. A large-diameter gear 32 is provided so as to be integrally fixed to the lower end of the transport case 20 . On the rear side of the large-diameter gear 32, there is provided an electric motor-type driving device 33 that meshes with the large-diameter gear 32 and is capable of rotating the entire grain discharging device 14 around the vertical axis Y ( See Figure 2).

By operating the driving device 33, the grain discharging device 14 rotates between a retracted posture in which the horizontal screw conveyor 18 is retracted to the upper side of the machine body and a discharge action posture in which the horizontal screw conveyor 18 extends laterally outward of the machine body. configured to be movable.

As shown in FIG. 2, the upper case 34 of the vertical screw conveyor 16 and the base end case 35 of the horizontal screw conveyor 18 are connected so as to be relatively rotatable about the horizontal axis X. As shown in FIG. As shown in FIG. 4, a hydraulic cylinder 38 for elevating operation is applied between a bracket 36 provided on the upper case 34 of the vertical screw conveyor 16 and a bracket 37 provided on the base end case 35 of the horizontal screw conveyor 18. are pivotally connected. By extending and contracting the hydraulic cylinder 38, the horizontal screw conveyor 18 is configured to be able to swing up and down around the horizontal axis X.

The power of the engine 13 is transmitted to the front portion of the bottom screw 15 via a transmission mechanism (not shown), and the power of the engine 13 drives the bottom screw 15 to rotate. The transmission mechanism is provided with a clutch mechanism for intermittently transmitting power, and the clutch mechanism is configured to be switchable between a transmission state and a transmission disengagement state by operating a clutch operating tool (not shown) provided in the driving unit 7. .

A drive shaft 39 of the bottom screw 15 extends so as to protrude rearward from the rear wall portion 10a of the grain tank 10 . A power transmission part 40 that transmits the power transmitted to the bottom screw 15 to the grain discharging device 14 is provided at the rear of the bottom screw 15 .

The power transmission unit 40 is configured as follows. As shown in FIG. 1 , the drive shaft 39 of the bottom screw 15 protrudes rearward from the relay case 19 . As shown in FIGS. 2 and 3, a drive sprocket 41 is attached to the outward projection of the drive shaft 39 . A horizontal relay shaft 42 is provided below the vertical screw conveyor 16 , and a driven sprocket 43 is attached to an outward projecting portion of the horizontal relay shaft 42 that projects rearward. A transmission chain 44 is wound over the driving sprocket 41 and the driven sprocket 43 . A tension ring 46 is provided on a support member 45 supported so as to be capable of swinging about its axis with respect to the lateral relay shaft 42 , and the tension ring 46 pulls the support member 45 so as to apply tension to the transmission chain 44 . A biasing spring 47 is provided.

As shown in FIG. 3, in the space for transmission integrally formed on the lower side of the relay case 19, there is a rotational state in which rotational power is converted from rotational power around the horizontal axis to rotational power around the vertical axis. A bevel gear mechanism 48 is provided as a converting section. The horizontal relay shaft 42 and the drive shaft 22 of the vertical screw conveyor 16 are interlocked via a bevel gear mechanism 48 .

An operation tool 49 is provided that acts on the drive shaft 39 (an example of a rotating portion) of the bottom screw 15 and can be manually operated to rotate the drive shaft 39 in a direction opposite to the rotation direction for transportation. As shown in FIGS. 1, 2 and 3, the manipulating tool 49 is provided with a connecting portion 51 which is connected to one end of a strip-like arm portion 50 to the shaft end of the drive shaft 39 on the projecting side so as to be capable of rotating integrally therewith. , and the other end of the arm portion 50 is provided with a grip portion 52 for manual operation.

The operating tool 49 is configured such that the connecting portion 51 is detachably connected to the shaft end of the drive shaft 39 . As shown in FIG. 3, the connecting portion 51 has an oval shape having a pair of flat portions on the outer peripheral surface of the drive shaft 39 so as to transmit rotational torque to the projecting shaft end of the drive shaft 39 . It is configured to fit. When not in use, the manipulator 49 is removed from the drive shaft 39 and stored at another location. At this time, it may be stored at a place away from the body of the combine, or an installation place capable of being stored may be provided in the body of the combine.

The operation tool 49 is used, for example, during maintenance work to remove grains, straw waste, etc. remaining inside the grain discharging device 14 after the harvesting work is finished.
When the operation tool 49 is attached and operated, it is necessary to switch the clutch mechanism provided in the transmission mechanism to the transmission cut state. By rotating the operation tool 49 in such a state that the transmission system is interrupted, the spiral bodies 21 and 25 of the vertical screw conveyor 16 and the horizontal screw conveyor 18 can be rotated. At this time, the spirals 21 and 25 can be rotated not only in the grain conveying rotation direction (forward rotation) but also in the opposite direction (reverse rotation).

As shown in FIG. 3, a rectangular opening 53 is formed in the lower portion of the transport case 20 of the vertical screw conveyor 16 . This opening 53 is closed by a lid 54 that can be opened and closed. The lid 54 is swingably supported at its upper portion by a hinge 55 and fixed by a knob bolt 56 at its lower portion. By removing the knob bolt 56, the lid 54 can be opened to expose the opening 53 to the outside.

Further, as shown in FIG. 5, an arcuate opening 57 is formed at the start end of the horizontal screw conveyor 18 to serve as a discharge port through which the residue can be discharged. This opening 57 is normally closed by a lid 58 . The left and right sides of the lid body 58 are fastened and fixed by bolts Bo. By removing the bolt Bo, the lid 58 can be opened to expose the opening 57 to the outside.

When the manipulator 49 is operated and rotated while the opening 53 of the vertical screw conveyor 16 and the opening 57 of the horizontal screw conveyor 18 are open, the objects to be removed that have accumulated inside the transport cases 20 and 24 are removed. It can be transported and discharged outward through openings 53 and 57 . At this time, since the opening 57 of the horizontal screw conveyor 18 is at a high position, if the object to be removed is discharged from the opening 57, the object to be removed may fall on the operator operating the manipulator 49. FIG.

Therefore, a recovery bag 59 as a recovery container capable of receiving the removal target discharged from the opening 57 of the horizontal screw conveyor 18 can be attached (see FIG. 4). A locking portion 60 for hooking and locking the recovery bag 59 is provided at a base end portion of the horizontal screw conveyor 18 . As shown in FIGS. 4 and 5, a support plate 61 is integrally fixed with a rod-shaped member 62 formed by bending. A locking portion 60 is configured. The left and right sides of the upper portion of the recovery bag 59 are locked to the left and right locking portions 60, so that the recovery bag 59 can be held in a recoverable state.

As shown in FIG. 5, the support plate 61 is bolted to the flange portion 29a of the transmission case 29 of the relay transmission portion 17 and the flange portion 35a of the base end case 35 so as to be tightened together. When the operating tool 49 is rotated, the recovery bag 59 is engaged with the engaging portion 60 and held in position, and the residue discharged from the opening 57 can be received and recovered.

[Another embodiment]
(1) In the above embodiment, the operating tool 49 acts on the drive shaft 39 of the bottom screw 15 as a rotating part. Various configurations can be employed, such as a configuration acting on the drive shaft 22 of the vertical screw conveyor 16, or a rotating portion of the power transmission unit 40, ie a configuration acting on the horizontal relay shaft 42.

(2) In the above embodiment, the opening (discharge port) 57 is formed at the conveying start end of the horizontal screw conveyor 18, but the opening 57 may be omitted.

(3) In the above embodiment, the locking portion 60 for locking and holding the collection container (collection bag 59) is provided at the conveying start end of the horizontal screw conveyor 18. However, such a locking portion 60 is provided. It may be configured without

(4) In the above embodiment, the operating tool 49 is detachable from the rotating part (drive shaft 39). It may be provided in a state that it is always attached to the rotating part.

(5) In the above embodiment, the power transmission section 40 has the transmission chain 44, but instead of this configuration, a bevel gear is provided between the drive shaft 39 of the bottom screw 15 and the drive shaft 22 of the vertical screw conveyor 16. It is good also as a structure interlocked by a transmission mechanism.

The present invention can be applied not only to ordinary combine harvesters but also to self-threshing combine harvesters.

10 Grain Tank 13 Engine 14 Grain Discharge Device 15 Bottom Screw 16 Vertical Screw Conveyor 18 Horizontal Screw Conveyor 39 Drive Shaft (Rotating Part)
40 Power transmission part 48 Rotation state conversion part 49 Manipulator 57 Discharge port 59 Collection container 60 Locking part

Claims (5)

engine and
a grain tank for storing grain;
A screw-type grain discharging device for discharging the grains stored in the grain tank to the outside of the machine;
A bottom screw that is provided at the lower end inside the grain tank and rotates to convey the grains stored in the grain tank to the grain discharging device;
a power transmission unit that transmits power transmitted from the engine to the bottom screw to the grain discharging device;
An operation that acts on the rotating portion of any one of the bottom screw, the grain discharging device, and the power transmission portion to allow the rotating portion to be rotated in a direction opposite to the conveying rotation direction by manual operation. A combine that is equipped with a tool and a. The combine according to claim 1, wherein the operating tool is detachable with respect to the rotating portion. a drive shaft of the bottom screw extending outwardly from the grain tank;
The power transmission unit is configured to transmit power to the grain discharging device via a rotation state conversion unit that converts rotational power from the protrusion of the drive shaft from a horizontal axis to a vertical axis,
The combine according to claim 1 or 2, wherein the operating tool acts on an outward projecting portion of the drive shaft as the rotating portion. In the grain discharging device,
A vertical screw conveyor that conveys the grains delivered from the bottom screw upward,
A horizontal screw conveyor that is interlockingly connected to the vertical screw conveyor via a relay transmission unit and horizontally conveys the grains delivered from the vertical screw conveyor,
The vertical screw conveyor and the horizontal screw conveyor can be rotated in conjunction with the operation of the operation tool,
4. The combine according to any one of claims 1 to 3, wherein the horizontal screw conveyor has a discharge port formed at the starting end of conveyance, through which the residue can be discharged as the operating tool is operated. 5. The combine according to claim 4, wherein the horizontal screw conveyor is provided with a locking portion for locking and holding a collection container capable of receiving the residue discharged from the discharge port at the beginning of conveyance.

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