JP2002101720A - Lifting and lowering operation structure for reaping and transporting part of combined harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting and lowering operation structure for a reaping and transporting part of a combined harvester, capable of reducing a manufacturing cost and a maintenance cost and facilitating a maintenance. SOLUTION: In this lifting and lowering operation structure for a reaping and transporting part of a combined harvester in which the reaping and transporting part 3 is connected liftably and shakably around a shaft center P1 in the right and left direction to the front part of a traveling machine body 2, the lifting and lowering operation structure is equipped with a screw shaft 78 installed in a changeable position between the traveling machine body 2 and the reaping and transporting part 3 and a female screw member 81 to be screwed to the screw shaft 78 and with a lifting and lowering operation mechanism 82 for lifting and lowering and rocking the reaping and transporting part 3 by normal and reverse rotation of the screw shaft 78 and with a braking arm 88 which can set a lead angle of the screw shaft 78 and the female screw member 81 at a large angle capable of rotating the screw shaft 78 by the weight of the reaping and transporting part 3 and brought into contact with a rotor 84 linked to the screw shaft 78 and rotated from the lower side in the rotation direction of the rotor 84 rotating by the weight of the reaping and transporting part 3 in a prop position to be freely cut into to the rotor 84 by the rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester transport unit lifting and lowering operation structure in which a harvesting transport unit is connected to a front part of a traveling machine body so as to be able to move up and down and swing around a left-right axis.

[0002]

2. Description of the Related Art Conventionally, in the above-described structure of raising and lowering the harvesting and transporting section of the combine, the raising and lowering operation of the harvesting and transporting section has been performed by hydraulic pressure.

[0003]

However, according to the above-mentioned prior art, various hydraulic devices such as a hydraulic pump, a hydraulic cylinder, and valves are required in addition to a piping system such as a hydraulic pipe and a joint. Due to the increase in cost, it is difficult to introduce small-sized models, especially those that are desired to be low-priced.Also, periodically check the oil and filter and change the oil and filter. , It is necessary to perform a troublesome maintenance operation and the maintenance cost is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a combine harvesting and transporting unit raising and lowering operation structure capable of reducing manufacturing costs and maintenance costs and facilitating maintenance.

[0005]

[Means for Solving the Problems] [Structure] In order to achieve the above object, in the invention according to claim 1 of the present invention, a mowing transport section is moved up and down around a left-right axis at a front portion of a traveling machine body. In a combine harvester / transporter lifting / lowering operation structure that is swingably connected, a screw shaft erected so as to be capable of changing a posture between the traveling body and the reaper / transporter, and a female screw member screwed to the screw shaft. And a lifting / lowering operation mechanism for raising / lowering the cutting / transporting unit by forward / reverse rotation of the screw shaft or the internal thread member, and setting a lead angle of the screw shaft and the internal thread member to the cutting / transporting unit. The screw shaft or the female screw member is set to a large angle that can be rotated with the weight of the screw shaft, and the rotating body that rotates in conjunction with the screw shaft or the female screw member rotates with the weight of the reaping conveyance unit. The rotation of the rotating body From a direction downstream side, equipped contact the person capable brake arm Brace posture becomes freely biting to the rotary member at its rotation.

According to the first aspect of the present invention, a screw feed structure is used in which the cutting and conveying unit is moved up and down by forward and reverse rotation of a screw shaft or a female screw member. This eliminates the need for piping systems such as hydraulic pipes and joints, as well as various hydraulic equipment such as hydraulic pumps, hydraulic cylinders, and valves, etc. There is no need to inspect the filter or replace the oil or filter, and only maintenance needs to be performed by applying grease to the screw shaft, etc., which can reduce manufacturing and maintenance costs and reduce maintenance. It can be easier.

Further, the mowing / transporting section can be lowered by its own weight, so that the forward / reverse switching required when the mowing / transporting section is moved up and down by driving the screw shaft or the female screw member to rotate in the forward / reverse direction. Since the mechanism can be omitted,
Accordingly, the configuration can be simplified and the manufacturing cost can be reduced.

In addition, when the braking arm is brought into contact with the rotating body, the braking arm bites into the rotating body which is to be rotated by receiving the weight of the reaping and transporting section when the cutting and transporting section stops moving up and down. As a result, it is possible to reliably prevent the weight of the mowing transport unit from lowering, and conversely, at the time of the raising operation of the mowing transport unit, the rotating arm driven by rotation rotates the brake arm in the direction away from the rotating body. As a result, there is no hindrance to the rise of the mowing transport unit, and the braking arm is instantaneously braked when the mowing transport unit stops rising. The mowing transport unit can be smoothly lowered by its own weight by separating the braking arm from the rotating body.

[Effect] Accordingly, a combine harvester / transporter lifting / lowering operation structure capable of comfortably raising / lowering the reaper / transporter while reducing manufacturing costs and maintenance costs, facilitating maintenance, and simplifying the configuration. Now available.

[0010] According to a second aspect of the present invention, in the first aspect of the present invention, the rotating body comprises a V-pulley, and the braking arm comprises a V-groove of the V-pulley. A brake shoe that can be engaged and connected to the swing arm is equipped at the free end of the swing arm.

According to the second aspect of the present invention, if a belt transmission type transmission system is used for the screw shaft or the female screw member, the rotating body can be effectively used for the transmission system. Therefore, the configuration can be simplified and the manufacturing cost can be reduced.

In addition, since the brake shoe is engaged with the V-groove of the V-pulley, the braking effect by biting can be obtained more effectively when the cutting / transporting unit stops moving up and down. The lowering can be more reliably prevented, and at the time of the raising operation of the reaping and transporting section, generation of abnormal noise when the brake arm is flipped by the rotating body can be prevented.

[Effect] Therefore, the structure can be simplified and the manufacturing cost can be further reduced, and the lowering of the weight of the reaper transport unit can be prevented more reliably. Sound generation can be avoided.

According to a third aspect of the present invention, in the first aspect of the present invention, the rotating body is formed of a sprocket, and the braking arm has a free end having a tooth of the sprocket. It consisted of a swing arm that can engage and contact the groove.

According to the third aspect of the invention, if a chain transmission type is adopted as the transmission system for the screw shaft or the female screw member, the rotating body can be effectively used for the transmission system. Therefore, the configuration can be simplified and the manufacturing cost can be reduced.

Further, since the free end of the brake arm is engaged with and engaged with the tooth groove of the sprocket, the braking effect due to biting can be obtained more effectively when the cutting / transporting portion stops moving up and down. It is possible to more reliably prevent the lowering of the weight of the cutting section, and when the cutting and conveying section is raised, the braking arm can be securely separated from the tooth groove by the tooth tip. Operation becomes more comfortable.

[Effect] Therefore, the structure can be further simplified and the manufacturing cost can be further reduced, the lowering of the weight of the reaper transport unit can be prevented more reliably, and the operation of raising the reaper transport unit can be more comfortable. Now you can do it.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the entire left side of a self-removing combine, FIG. 2 shows the entire right side thereof, and FIG. 2 shows the entire plane thereof. A harvesting and transporting section 3 is connected to the front left side of a traveling body 2 having a pair of crawler-type traveling devices 1 so as to be able to move up and down and swing around a left-right axis P1. 4
And a driver's seat 5 and the like, a boarding operation unit 6 is formed, and a threshing process and a sorting of the harvested culm from the cutting and conveyance unit 3 are provided at the rear of the cutting and conveying unit 3 and the boarding operation unit 6 in the traveling machine body 2. A threshing device 7 that performs processing and the like is mounted, and a waste straw cutting device 8 that shreds waste straw from the threshing device 7 is provided at the left rear portion of the threshing device 7 in the traveling machine body 2, and threshing in the traveling machine body 2 At the right rear part of the device 7, a bag packing device 11 for packing grains transported from the threshing device 7 via the unloading conveyor 9 into the paddy bags 10 is provided.

As shown in FIGS. 1 and 2 and FIGS. 4 to 6, the left and right crawler-type traveling devices 1 each have a drive wheel 13 disposed at a front portion of a track frame 12 and an idle wheel 14 disposed at a rear portion of the track frame 12. Are provided so as to be position-adjustable in the front-rear direction, and three rolling wheels 15 are disposed between the driving wheel 13 and the idler wheel 14, and the crawler belt 16 is arranged so as to surround them.
And an L-shaped front connecting frame 1 extending upward from each of the left and right track frames 12.
7, and is connected to a main frame 19 of the traveling body 2 via a mountain-shaped rear connection frame 18 spanning the left and right track frames 12.

Incidentally, the front and rear connecting frames 17, 1
8 adopts a round pipe material that is easy to bend.
The left and right front connection frames 17 vertically penetrate the main frame 19 made of a square pipe material.

As shown in FIGS.
Three dividers 22 for scooping up the fallen planted cereal stems on a cutting frame 21 supported on a support member 20 erected over the left and right front connection frames 17 so as to be able to ascend and descend around a horizontal axis P1; Left and right raising devices 23 for piling up the settled grain culm, a clipper-shaped cutting device 24 for cutting the root side of the set grain culm, and a vertical posture while transporting the cut grain culm backward. The apparatus is provided with a transport device 25 that changes the posture to the horizontal posture, and is configured to perform reaping and transporting for two rows.

As shown in FIG. 7, in the threshing apparatus 7, a feed chain 26 disposed on the left outer side of the threshing apparatus 7 transports the harvested grain culm from the transporting apparatus 25 backward while holding the stem side of the stem. Then, the handling drum 27 mounted on the left half of the threshing device 7 rotates around the longitudinal axis P2, so that the tip of the harvested grain culm guided on the receiving net 28 by the conveyance by the feed chain 26. The threshing process is performed on the side, and Karin 29, which is arranged at the lower left of the handling cylinder 27, rotates around the longitudinal axis P3 and supplies the sorting wind flowing to the right, thereby threshing. A wind sorting process is performed on the processed material and the like that has leaked from the receiving net 28 by the processing, and the swing sorting mechanism 31 disposed below the receiving net 28 is rotated left and right by the rotation of the drive shaft 32 in the front-rear direction. By being rocked, the processed material supplied to the rocking sorting mechanism 31 is moved rightward. The sieving and sorting process is performed on the processed material while being conveyed, and the first screw 33 disposed on the upper side in the sorting direction below the swinging and sorting mechanism 31 rotates around the front-rearward axis P4. , Swing sorting mechanism 3
The conveyor 9 transports the grains that have leaked from the upstream side in the sorting direction 1
The second screw 34 disposed on the lower side in the sorting direction below the swing sorting mechanism 31 rotates around the axis P5 in the front-rear direction, whereby the swing sorting mechanism 31 is rotated.
The mixture of grains and broken straw, etc., which has leaked from the lower side in the sorting direction, is conveyed to a slower-type processed material transport mechanism 35, and the lower blade 36 of the processed material transport mechanism 35 is integrated with the second screw 34. By rotating, the mixture is reduced on the receiving net 28 and reprocessed.

Among the processed materials, dust such as broken straws and straw chips conveyed to the rear end of the swing sorting mechanism 31 without leaking from the swing sorting mechanism 31 is supplied to the boarding operation unit 6 of the threshing device 7. Dust port 37 formed on the right side (see FIGS. 2 and 7)
This makes it possible to reliably prevent inconvenience that dust, such as straw chips, discharged from the threshing device 7 falls on the uncut culm, and thus falls on the uncut culm. It is possible to avoid a decrease in the sorting performance and the sorting efficiency due to the supplied dust being supplied to the threshing device 7 together with the harvested grain culm.

As shown in FIGS. 8 and 9, the waste straw cutting device 8 is equipped with a first roll 38 which rotates around a left-right axis P6 so as to move in and out with the rotation. A locking pin 39 locks the leftward and rightward waste straw from the feed chain 26 at an intermediate portion thereof, is adjacent to the first roll 38, and rotates around the leftward and rightward axis P7.
A pine needle-shaped fold is made by rubbing it toward the roll 40, and the pine needle-shaped waste straw is rotated by rotating the rolls 38 and 40, and the fixed blade 41 disposed below them and the left-right axis P 8. A cylinder-type cutter that cuts in order from the bent end of the waste straw by feeding it toward the rotating blade 42 that rotates around is employed. Compared to the case of employing a disk-type cutter that shreds with a disk, the left and right length of the installation space required for installing the waste straw cutting device 8 behind the threshing device 7 can be significantly reduced. The space in which the bag stuffing device 11 is arranged can be increased in the left-right direction.

As shown in FIGS.
Is a pair of left and right support rods 43 extending rearward from a mounting table 43 formed at the right rear of the traveling body 2 and a support frame 44 erected at the front of the mounting table 43. 4
The left and right rice bags 10 supported by the right and left are fed with the grains from the unloading conveyor 9 and the left and right forked chute 46 connected to the transport end of the unloading conveyor 9, and the grains in the chute 46. It is configured to be a two-bag type that is supplied by switching with a shutter 47 that switches the flow-down path of the rice pad, so that one filled paddle 10 is replaced with an empty padded bag 10 while the other paddle 10 is replaced. Since the grains can be stored, the grain collection efficiency can be improved as compared with the case of a single bag type.

With the above arrangement, the front-rear length of the threshing device 7 can be reduced as compared with the case where the swinging and sorting mechanism 31 having a longer length than the handling cylinder 27 is disposed in the front-rear direction. ,
The front and rear length can be reduced as compared with the case where the waste straw cutting device 8 and the bag filling device 11 are arranged side by side behind the threshing device 7, and furthermore, by using them, the front and rear of the traveling machine body 2 can be reduced. Since the length can be shortened and the weight can be reduced, the overall length of the combine can be shortened and the total weight can be reduced, so that it is a riding type having the boarding operation unit 6. However, it is possible to load the light truck on a carrier, and thus it can be used in a field such as a mountainous area where the combine can be transported only by the light truck due to road conditions or the like.

As a result, it is not necessary to walk on a muddy field during the harvesting and harvesting operation in a field such as a mountainous area using a walk-type combine or the like that can be loaded on a light truck. Since it is possible to easily perform the work of aligning the position of the planted grain culm to be cut and the position of the planted culm to be cut, it is possible to reduce the labor and improve the workability when performing the cutting and harvesting work. .

Further, it is possible to avoid imbalance in the left-right balance due to the storage amount of the bagging device 11 which occurs when the threshing device 7 and the bagging device 11 are arranged side by side in the left-right direction. It is not necessary to provide a balance weight in the bagging device 11 in order to balance with the heavy threshing device 7, so that the stability can be improved while further reducing the weight of the fuselage, and furthermore, the combine In shortening the total length, since there is no need to pack between the harvesting transport unit 3 and the threshing device 7, the length required to change the harvested grain culm to a suitable posture with respect to the threshing device 7, The pillow can be easily secured between the reaper 24 and the threshing device 7 of the reaper transport unit 3 without adversely affecting the threshing process, and manually supplying the hull culm to the threshing device 7. Can perform well It has become the jar.

As shown in FIGS. 8 and 9, a lid 48 that can be opened and closed around a left-right axis P 9 is provided on the upper part of the waste straw cutting device 8. Is provided with a cover 49 that covers a discharge straw transporting path from the feed chain 26 to the discharge straw cutting device 8 so that the cover 49 can be repositioned around a left-right axis P10 between an ascending position and a descending position.

The cover 49 is provided with an operation arm 50 capable of swinging around a left-right axis P11. The operation arm 50 is engaged with an engagement pin 51 provided on the threshing device 7, A long hole 52 is formed that can hold the cover 49 at two positions, an open position and a closed position, and can hold the cover 49 at the closed position. The body 48 is held in an open position. Reference numeral 53 in FIGS. 8 and 9 denotes an urging spring for maintaining the operation arm 50 in an engagement posture for holding the cover 49 at the open position and the closed position.
Is switched to a state in which the straw from the threshing device 7 is guided to the waste straw cutting device 8 with the switching of the cover 49 to the closing position, and the switching from the threshing device 7 with the switching of the cover 49 to the open position. The guide rod is switched to a state that allows the discharged straw to pass above the discharged straw cutting device 8.

That is, by opening and closing the lid 48 and the cover 49, the discharged straw is discharged, the shredder from the threshing device 7 is supplied to the discharged straw cutting device 8, and the discharged straw is cut off. It is possible to easily switch to a long straw release state in which the straw is discharged without being supplied to the tray 8 without the trouble of attaching and detaching the discharge straw cutting device 8.

As shown in FIGS. 2 to 5 and FIG. 10, an engine 55 is mounted below the driver's seat 5 in the traveling machine body 2 so that an output shaft 56 thereof is oriented forward and backward.
The power from the engine 55 is transmitted to the front-rear input shaft 5 via a first belt tension clutch 57 for left and right.
8 to the transmission case 59 provided with
The force is transmitted to a threshing device 7 having a front-rearward drive shaft 61 via a left-rightward second belt tension clutch 60, and further to a left-rightward third belt tension clutch 6.
2, the power is transmitted to a front-rear transmission shaft 63 mounted on the front connection frame 17 on the left side.

That is, each belt tension clutch 5
Since the components 7, 60 and 62 are disposed in the left-right direction, the total length of the combine can be shortened as compared with the case where they are disposed in the front-rear direction.

As shown in FIG. 11, the transmission case 5
9 is a bevel gear 6 for converting the power around the longitudinal axis input to the input shaft 58 into the power around the horizontal axis.
4. A gear-type transmission mechanism 65 capable of switching the power from the bevel gear 64 between forward power and reverse power, and capable of switching the forward power in three stages, and a gear-type transmission mechanism 65
Power after shifting from the crawler traveling device 1
A transmission state for transmitting to a corresponding one of a pair of left and right output shafts 66 which are drive shafts of the right and left, a cut-off state for not transmitting to a corresponding output shaft 66, and a braking state for braking and stopping the corresponding output shaft 66. And a pair of left and right side clutch brakes 67, etc., configured to be able to switch between and appear.

That is, since the power around the longitudinal axis from the engine 55 is converted into the power around the lateral axis by effectively utilizing the internal space of the transmission case 59,
Compared to the case where a dedicated power conversion mechanism is provided outside the transmission case 59, the configuration can be simplified and the overall size of the combine can be avoided.

As shown in FIG. 10, the drive shaft 61 of the threshing device 7 is also used as the screw shaft of the second screw 34, and the engine 5 transmitted to this screw shaft 61
5 is transmitted to the Karino 29 and the No. 1 screw 33 via the first belt-type transmission mechanism 68, and the power of the handling cylinder 27 and the swing sorting mechanism 31 is transmitted from the Karino 29 via the second belt-type transmission mechanism 69. The power is transmitted to the drive shaft 32.

As shown in FIGS. 8 to 10 and FIG. 12, the power transmitted to the carving 29 is transmitted to the rotary blade 42 of the waste straw cutting device 8 via a third belt type transmission mechanism 70, a bevel gear 71 and the like. Is transmitted from the rotary blade 42 to the first roll 38 via the first chain type transmission mechanism 72, and is transmitted from the first chain type transmission mechanism 72 to the small diameter gear 73 and the large diameter gear 7.
4 to the second roll 40 and the first roll 38
From the feed chain 26 of the threshing device 7 via the second chain-type transmission mechanism 75 and the third chain-type transmission mechanism 76
It is transmitted to.

With this transmission configuration, when the waste straw cutting device 8 is clogged with waste straw and stops operating, the feed chain 26 is stopped in conjunction with the stoppage of operation. This makes it possible to avoid the disadvantage that the waste straw from the threshing device 7 is supplied to the waste straw cutting device 8 by the feed chain 26 even though the waste straw cutting device 8 is clogged with the waste straw. I have.

As shown in FIGS. 4, 5, 10, 13, and 14, a chain-type transmission mechanism 123 is attached to the transmission shaft 63.
The drive shaft 124 is interlocked and connected via the drive shaft 12.
4 is connected to a screw shaft 78 via a universal joint 77, and the screw shaft 78 has a first member 79 rotatably supported by the cutting frame 21 around a left-right axis P12.
And the second member 80 rotatably supported by the first member 79 about the vertical axis P13, and the cutting frame 2
A female screw member 81 supported rotatably in two directions is screwed into one.

That is, this combine has a traveling body 2
A screw feed type lifting / lowering operation mechanism 82 that raises / lowers and swings the reaping / transporting unit 3 by forward / reverse rotation of a screw shaft 78 erected so that the posture can be freely changed between the cutting shaft and the cutting / transporting unit 3 is provided.
8 is connected to the transmission shaft 63 via a universal joint 77, and the female screw member 81 is rotatably mounted in the cutting frame 21 in two directions. The transport unit 3 can be moved up and down by screw feed.

In the elevating mechanism 82, the lead angle of the screw shaft 78 and the female screw member 81 is set to a large angle that allows the screw shaft 78 to be reversed by the weight of the cutting and conveying unit 3. The lifting operation mechanism 82 is provided with a braking mechanism 83 for stopping the rotation of the screw shaft 78.

As shown in FIGS. 4, 5, and 15, the braking mechanism 83 includes a V pulley 84 for output, which is a rotating body that rotates integrally with the transmission shaft 63 in the third belt tension clutch 62, and a V pulley thereof. A brake arm 86 is provided at the free end of the swing arm 87 with a brake shoe 86 which can be engaged and connected to the V-shaped groove 85 of FIG.

When the V-pulley 84 rotates in the reverse direction due to the weight of the reaper 3, the braking arm 88 is moved from the lower side in the rotation direction of the V-pulley 84 to the V-pulley 84. The main frame 19 is swingably supported around a longitudinal axis P14 so as to be able to contact the pulley 84.
Urging spring 89 erected from 9 to the braking arm 88
Urged to join the V pulley 84.

Incidentally, as shown in FIG.
The output sprocket 126, which is a rotating body interlocked with the screw shaft 78 in the chain type transmission mechanism 123, and the sprocket 126 from the lower side in the rotation direction of the sprocket 126 when the sprocket 126 reverses due to the weight of the cutting and conveying unit 3. With the rotation of the sprocket 126, the free end becomes the sprocket 126.
And a braking arm 88 composed of a swinging arm 128 supported by the main frame 19 so as to be able to swing around a longitudinal axis P <b> 21 so as to engage in and engage with the tooth groove 127. It may be configured. By the way, in this configuration, the braking arm 88
An urging spring 129 extending from the main frame 19 to the brake arm 88 urges the sprocket 126 toward the sprocket 126.

As shown in FIG. 4, FIG. 5, FIG. 15, FIG. 16, and FIG. 17, the braking arm 88 crosses the control tower 4 around the left-right axis P15 and the front-rear axis P16. A neutral return type control lever 90 movably mounted, a first front-rear balance arm 91 mounted to be able to swing integrally with the control lever 90, and a first linking wire 92 extending from the rear end to the brake arm 88. 1 and the urging spring 89 (FIG. 1) in conjunction with the operation of the control lever 90 to the lower position on the front side.
6, the V pulley 84 is pressed against the urging of the urging spring 129).
(The sprocket 126 in FIG. 16) is separated from the pulley 84 by the urging of the urging spring 89 (the urging spring 129 in FIG. 16) in conjunction with the operation of the control lever 90 to the neutral position or the rearward upward position. In FIG. 16, they are linked so as to contact the sprocket 126).

As shown in FIGS. 5, 15 and 17, the front end of the first balance arm 91 is
7, the tension arm 93 of the third belt tension clutch 62 supported by the transmission shaft 63 so as to be swingable around its axis P17 via the second linking wire 125,
In conjunction with the operation of the control lever 90 to the rear upward position, the third belt tension clutch 62 is set in the transmission state against the bias of the biasing spring 95 provided from the main frame 19 to the tension arm 93. The third belt tension clutch 62 is switched to the disconnected state by the urging of the urging spring 95 in conjunction with the switching and the operation of the control lever 90 to the neutral position or the downward position on the front side.

With the above configuration, when the control lever 90 is operated to the raised position, the transmission state of the third belt tension clutch 62 and the braking arm 88 are controlled by the urging spring 89.
A state in which the braking arm 88 is connected to the V pulley 84 by the urging of the V pulley 84 appears.
Since the screw shaft 78 that is flipped in the direction away from the pulley 84 and rotates integrally with the V pulley 84 is driven to rotate forward to feed the female screw member 81 toward the cutting and conveying section 3, the cutting and conveying is performed. The part 3 can be raised without any trouble.

Conversely, when the control lever 90 is operated to the lowered position, the third belt tension clutch 62 is disconnected and the brake arm 88 is separated from the V pulley 84 against the urging of the urging spring 89. And the screw shaft 78 is rotated in reverse by receiving the weight of the reaping and transporting unit 3 to feed the female screw member 81 toward the traveling body 2. Thus, the mowing transport unit 3 can be smoothly lowered by its own weight.

When the control lever 90 is operated to the neutral position, the state where the third belt tension clutch 62 is disconnected and the state where the braking arm 88 is joined to the V pulley 84 by the urging of the urging spring 89 are present. As a result, the braking mechanism 88 comes into contact with the V-pulley 84 that is going to rotate in the reverse direction together with the screw shaft 78 under the weight of the reaping and transporting section 3 so that the braking arm 88 bites into the tensioning posture.
Since the braking state of No. 3 appears, the mowing and transporting section 3 can be reliably stopped and lowered.

That is, the lifting operation mechanism 82 is connected to the screw shaft 78.
The cutting and conveying unit 3 is configured to be screw-driven so that it can be moved up and down by forward / reverse rotation. Therefore, the manufacturing cost and maintenance cost can be reduced compared to the case of using a hydraulic system that requires a hydraulic pump and a hydraulic cylinder. Further, maintenance can be facilitated.

Further, since there is no need to provide a dedicated prime mover (for example, an electric motor) for rotating the screw shaft 78 or a forward / reverse switching mechanism for switching the rotation direction of the screw shaft 78, the structure can be simplified and Manufacturing costs can be reduced and maintenance can be further facilitated.

As shown in FIGS. 11 and 17, the control lever 90 is composed of a left-right-oriented second balance arm 94 mounted on the control lever 90 so as to swing integrally therewith, and a corresponding side clutch brake 67 from both left and right ends thereof. The transmission state of each of the left and right side clutch brakes 67 is displayed in conjunction with the operation of the control lever 90 in the left or right direction from the neutral position of the control lever 90 via the left and right third link wires 96 over the operation arm 95 of the control lever 90. From a straight running state in which the left and right crawler-type traveling devices 1 are driven at a constant speed, to a gentle turning state in which the cut-off state of the side clutch brake 67 corresponding to the operation direction is revealed and one of the crawler-type traveling devices 1 idles. Switching to a sharp turning state in which the braking state of the side clutch brake 67 corresponding to the operation direction is displayed and the braking of one crawler type traveling device 1 is stopped. They are linked so as to be able to leave.

As shown in FIG. 4, FIG. 5 and FIG.
7 and a tension arm 93 of the third belt tension clutch 62, a linkage arm 98 as a mechanical linkage mechanism is swingably connected around a left-right axis P18. Reference numeral 98 denotes a tension arm 9 in conjunction with the reaching of the reaper transport unit 3 to the upper limit position.
The third belt tension clutch 62
Is switched from the transmission state to the cutoff state.

In other words, as the mowing transport unit 3 reaches the upper limit position, the ascent of the mowing transport unit 3 can be automatically stopped, whereby the incomplete screw portion 78A of the screw shaft 78 can be moved. Can be prevented from being caught by the female screw member 81, so that it is possible to prevent a situation in which the raising and lowering operation of the reaping and transporting unit 3 cannot be performed due to the biting.

As shown in FIG. 2 and FIG.
The control box 99 is located adjacent to the reaping and transporting section 3 in
A position-holding accelerator lever 100 is provided at the front of the control box 99, and a position-holding speed-change lever 101 is provided at the front and rear intermediate portion of the control box 99, and at the rear of the control box 99. In the figure, a position holding type harvesting clutch lever 102 and a threshing clutch lever 103 are arranged side by side on the left and right.

As shown in FIGS. 18 to 20, the accelerator lever 100 is moved to the speed adjusting lever 104 of the engine 55 via an operation wire 105, which is an example of an operation system, as the accelerator lever 100 is operated rearward. The numbers are linked to rise.

The operation wire 105 is the inner wire 1
The end of the accelerator lever 10 on the side of the accelerator lever 100 is linked to the threshing clutch lever 103 via a linking mechanism 111. The linking mechanism 111 has a U-shape supported by a support shaft 112 that supports the mowing clutch lever 102 and the threshing clutch lever 103 so as to be swingable about a left-right axis P19 so as to be swingable around the axis P19. Swing arm 113,
A link pin 114 that is rotatably supported by the swing arm 113 about a left-right axis P20 and through which the inner wire 110 is inserted, and is fixed to an end of the inner wire 110 closer to the accelerator lever 100 than the link pin 114 is. The swing arm 113 is connected to the fixing member 115, the coil spring 116 externally fitted between the linking pin 114 of the inner wire 110 and the fixing member 115, and the threshing clutch lever 103 so as to be able to swing integrally around the axis P 19. If the engine speed is lower than the rated speed,
In conjunction with the operation of the threshing clutch lever 103 from the off position to the on position, the speed control lever 104 is moved to the accelerator lever 1.
In addition to switching from the set position a corresponding to the operation position of 00 to the rated position b at which the engine 55 rotates at the rated speed, the return associated with the speed control lever 104 in conjunction with the operation of the threshing clutch lever 103 from the on position to the off position. Spring 13
The action of 0 causes the speed control lever 104 to return from the rated position b to the set position a.

Thus, even if the accelerator lever 100 is not operated before the reaping and harvesting operation is started, a preparatory operation for raising the engine speed to the rated speed is not required.
Threshing clutch lever 1 for starting reaping and harvesting
The engine speed can be automatically increased to the rated speed by operating from the off position to the on position of 03, and when the reaping and harvesting operation is interrupted, the off position from the on position of the threshing clutch lever 103 is turned off. The engine speed from the rated speed by operating the accelerator lever 1
Since the number of revolutions can be automatically reduced to the number corresponding to the operating position of 00, the operation of the accelerator lever 100 is operated each time the reaping and intermittent operation is intermittently operated to change the engine speed. Labor saving can be achieved.

When the setting of the engine speed is changed by operating the accelerator lever 100, the tachometer required for confirming the engine speed can be dispensed with. The structure can be simplified and the manufacturing cost can be reduced.

As shown in FIGS. 18 and 20, the bolt 117 with knob is disposed outside the guide plate 118 for guiding the operation of the threshing clutch lever 103, and the threshing clutch is operated by operating the bolt 117 with knob. Lever 10
3 can be easily attached and detached.

That is, the bolt 117 with a knob can function as a release operation tool for releasing the connection between the threshing clutch lever 103 and the operation wire 105, thereby driving the threshing device 7 at a low speed to perform cleaning. When adjusting the threshing clutch lever 103, the bolt 117 with knob is operated to release the linkage between the threshing clutch lever 103 and the operation wire 105, and the accelerator lever 100 is operated to the low speed side. By switching from the position to the entry position, the threshing device 7 can be driven at a low speed.

The threshing clutch lever 103 is connected to the threshing clutch lever 103 such that the threshing clutch lever 103 is switched from the off position to the on position in conjunction with the operation of the cutting clutch lever 102 from the off position to the on position. 102 is provided with a linking arm 119 as a linking mechanism for linking one-sidedly.

According to this configuration, when the reaping and harvesting operation is started, simply operating the reaping clutch lever 102 from the cut position to the entering position requires only the threshing clutch lever 10.
3 can be switched from the off position to the on position, and the speed control lever 104 is moved from the set position a to the rated position b.
And the harvesting transport unit 3 and the threshing device 7 can be operated at the same time in a state where the engine speed is increased to the rated speed. Labor saving can be achieved more effectively.

Conversely, even if the reaping clutch lever 102 is operated from the on position to the off position during the reaping and harvesting operation, the threshing clutch lever 103 is located at the on position and only the reaping transport section 3 stops operating. When the threshing clutch lever 103 is configured to switch from the on position to the off position in conjunction with the operation of the clutch lever 102 from the on position to the off position, the processed material during the threshing process or the sorting process that occurs when the threshing clutch lever 103 is switched from the on position to the off position. The threshing device 7 stops operating in the presence state, the waste straw cutting device 8 stops operating in the presence of waste straw during the cutting process, or the bag filling device 11 stops in the presence of grains that are being bagged. Can be avoided.

When the threshing clutch lever 103 is moved from the on position to the off position in order to stop the operation of the threshing device 7 or the waste straw cutting device 8, the cutting clutch lever 102 is located at the on position. In addition, since the cutting clutch lever 102 can be switched from the on position to the off position together with the operation of the threshing clutch lever 103 from the on position to the off position, it is possible to prevent the harvest clutch lever 102 from being forgotten to the off position. Yes, and if the interlocking operation is intentionally performed,
The mowing transport unit 3 and the threshing device 7 can be stopped all at once while lowering the engine speed to the speed set by the accelerator lever 100, so that labor required for interrupting or terminating the mowing and harvesting work can be saved. More effectively.

In addition, in the state where the cutting clutch lever 102 is located at the cutting position, the cutting clutch lever 102 remains at the cutting position even if the threshing clutch lever 103 is operated. Since the operating states of the threshing device 7 and the waste straw cutting device 8 can be switched without the need, the pillow handling operation of manually supplying the harvested grain culm to the threshing device 7 can be performed without any trouble.

Note that the shift lever 101 shown in FIG.
1 is linked to a shift member 106 of the gear-type transmission mechanism 65 via an operation system (not shown), and the reaping clutch lever 102 shown in FIGS. 2, 3, and 20 is connected to the first shaft 107 of the gear-type transmission mechanism 65. 4, 5, 10, and 11, which are connected to the input shaft 108 of the mowing transport unit 3 via an operation system (not shown). The threshing clutch lever 103 shown in FIGS. 18 to 20 is linked to the second belt tension clutch 60 shown in FIG. 10 via an operation system (not shown).

As shown in FIG. 2 and FIG.
The operation pedal 121 linked to the first belt tension clutch 57 (see FIG. 10) and the traveling brake 120 (see FIG. 11) installed in the transmission case 59 via an operation system (not shown) is located at the right foot position in FIG. When the operation pedal 121 is depressed, the disengaged state of the first belt tension clutch 57 and the braking state of the traveling brake 120 can be revealed, and the traveling of the aircraft can be stopped. It has become.

The operation pedal 121 is integrally provided with a locking arm 122 extending forward of the riding operation unit 6. The locking arm 122 is provided with the locking arm 122 on the riding operation unit 6. By engaging with the member, the operation pedal 121
Can be held at the depressed position where the disconnected state of the first belt tension clutch 57 and the braking state of the traveling brake 120 appear. That is, the locking arm 12
The traveling brake 120 can function as a parking brake by the 2 and the locking member.

[Alternative Embodiment] The raising / lowering operating mechanism 82 may be configured to vertically move and reciprocate the reaping / transporting section 3 by rotating the female screw member 81 forward or backward.

[Brief description of the drawings]

FIG. 1 is an overall left side view of a combine.

FIG. 2 is a right side view of the whole combine.

FIG. 3 is an overall plan view of the combine.

FIG. 4 is a vertical cross-sectional side view showing a raising and lowering operation structure of the reaper transport unit.

FIG. 5 is a rear view showing an ascending and descending operation structure of the reaper transport unit.

FIG. 6 is a longitudinal sectional front view showing a frame structure of a rear part of the fuselage.

FIG. 7 is a longitudinal rear view showing the configuration of the threshing apparatus.

FIG. 8 is a longitudinal side view of the waste straw cutting device showing a shredded release state.

FIG. 9 is a longitudinal sectional side view of the waste straw cutting device showing a long straw discharging state;

FIG. 10 is an expanded sectional view showing a part of the transmission structure.

FIG. 11 is a longitudinal rear view of a transmission case.

FIG. 12 is an exploded cross-sectional view showing a configuration of a waste straw cutting device.

FIG. 13 is a cross-sectional plan view showing a support structure of a female screw member.

FIG. 14 is a longitudinal sectional side view showing a support structure of a female screw member.

FIG. 15 is a rear view showing the configuration of the braking mechanism.

FIG. 16 is a rear view showing another configuration of the braking mechanism.

17A is a longitudinal side view showing a linkage structure of a control lever. FIG. 17B is a longitudinal sectional front view showing a linkage structure of a control lever.

FIG. 18 is an association diagram showing an engine governing structure;

FIG. 19 is an enlarged view of a main part of the engine governing structure;

FIG. 20 is a longitudinal rear view of a main part of the engine governing structure;

[Explanation of symbols]

 Reference Signs List 2 traveling machine body 3 cutting and conveying unit 78 screw shaft 81 female screw member 82 elevating operation mechanism 84 rotating body (V pulley) 85 V groove 86 brake shoe 87 swing arm 88 braking arm 126 rotating body (sprocket) 127 tooth groove 128 swing Arm P1 Shaft center

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenichi Terasaka 64 Ishizu-Kitacho, Sakai-shi, Osaka F-term in Kubota Sakai Works (reference) 2B076 AA03 BA03 BA08 CA04 CA19 DB02 DB03 DB06 DB09 2B382 GA03 GB01 GC03 GC04 GD02 HA01 HB02 HF02 HF13 HG04

Claims (3)

[Claims] 1. A harvesting / transporting unit raising / lowering operation structure of a combine harvester, wherein a harvesting / transporting unit is connected to a front portion of a traveling body so as to be able to move up and down around a left-right axis. And a female screw member screwed to the screw shaft so as to be able to freely change the posture of the reaper, and the cutting and conveying unit is moved up and down by forward and reverse rotation of the screw shaft or the female screw member. Equipped with an elevating operation mechanism to make the screw shaft and the lead angle of the female screw member,
While setting the screw shaft or the female screw member to a large angle capable of rotating by the weight of the reaping transport unit, the rotating body that rotates in conjunction with the screw shaft or the female screw member, A combine harvester / transport unit lifting / lowering operation structure equipped with a braking arm which can be brought into contact with the rotating body from the lower side in the rotation direction of the rotating body rotated by weight in such a manner that the rotating body can easily bite into the rotating body. 2. The rotating body is constituted by a V-pulley, and the brake arm is constituted by equipping a free end of a swing arm with a brake shoe which can be engaged and joined to a V-groove of the V-pulley. The structure for raising and lowering a combine harvester and transporter according to claim 1. 3. The combine as claimed in claim 1, wherein said rotating body is constituted by a sprocket, and said braking arm is constituted by a swinging arm whose free end can be engaged with and engaged with a tooth space of said sprocket. Mowing transport section lifting operation structure.