JP2020182499A - Combine harvester - Google Patents

Abstract

To provide a combine harvester which is less space consuming due to arrangement of a hydraulic oil tank in an appropriate position.SOLUTION: A combine harvester includes a travel machine body 1 which is equipped with a threshing unit having a threshing cylinder and an engine. A reaping unit is disposed in a front part of the threshing unit, and reaped grain culms conveyed from the reaping part via a feeder house 11 are charged into the threshing unit disposed at an end edge side of the feeder house 11. A hydraulic oil tank 57 for storing hydraulic oil is installed on the travel machine body 1 and below the feeder house 11, in a position where portions of a cooling fan of the engine, the engine and the hydraulic oil tank 57 are aligned so as to overlap in a machine body front-back direction position, and in front of a winnowing fan 29.SELECTED DRAWING: Figure 11

Description

The present invention relates to a combine equipped with a cutting section for cutting uncut grain culms in a field and a threshing section for threshing the grains of the cut grain culms.

Conventionally, in a normal combine equipped with a feeder house that transports the culm cut by the cutting section to the handling cylinder, a beater for feeding the culm is provided in the cutting section between the end of the feeder house and the entrance of the handling cylinder to the handling cylinder. There is a technique for improving the uptake of harvested grain rods (see Patent Document 1). In addition, a self-removing combine harvester equipped with a feed chain that transports the culms cut by the cutting section to the handling cylinder has been proposed to store the hydraulic oil supplied to the continuously variable transmission in the hydraulic oil tank. (See Patent Documents 2 and 3). Further, in a conventional combine, there is a technique of providing a hydraulic pump and a hydraulic motor in the left and right traveling portions to drive the left and right traveling portions (see Patent Document 4).

Japanese Unexamined Patent Publication No. 2000-037126 Japanese Unexamined Patent Publication No. 2004-058824 Japanese Unexamined Patent Publication No. 2015-084709 JP-A-2010-239980

The prior art shown in Patent Documents 1 to 4 describes a combine in which a hydraulic oil tank is arranged on a traveling machine body.

The present invention is to provide a space-saving combine by arranging a hydraulic oil tank at an appropriate position.

In order to achieve the above object, the combine of the present invention is provided with a traveling machine equipped with a threshing section equipped with a handling barrel, an engine, and a cutting section provided in front of the threshing section, and a feeder house is provided from the cutting section. In the combine that puts the harvester that is transported through the harvester into the threshing section provided at the end side of the feeder house, the hydraulic oil tank that stores the hydraulic oil is arranged on the traveling machine and below the feeder house. It is a thing.

In the above combine, a cooling fan that blows air toward the other side in the body width direction of the engine is provided on one side in the body width direction of the engine, and a hydraulic oil tank is arranged on the other side in the body width direction of the engine. A part of each of the engine and the hydraulic oil tank may be arranged side by side so as to overlap each other in the front-rear position of the airframe.

In the combine, the wall inserter may be arranged below the threshing machine, and the hydraulic oil tank may be arranged in front of the wall inserter.

In the combine, a transmission shaft for transmitting the driving force from the engine to the input shaft of the conveyor of the feeder house is provided in front of the threshing section, and the hydraulic oil tank may be arranged below the transmission shaft.

According to the present invention, space can be saved by arranging the hydraulic oil tank below the feeder house.

It is a left side view of the combine which shows the 1st Embodiment of this invention. It is a right side view of the combine. It is a plan view of the combine. It is a drive system diagram of a combine. It is a perspective view of the combine seen from an oblique front. It is a partial plan sectional view of a threshing part. It is a drive system diagram of a mission case. It is a front view which shows the structure of an engine room and a threshing part. It is a hydraulic circuit diagram which shows the structure of the work system hydraulic circuit. It is a perspective view which shows the structure of the work system hydraulic circuit. It is a perspective view of the threshing part seen from an oblique front. It is the left side enlarged view of the threshing part. It is a top sectional view which shows the structure of an engine room and a threshing part. It is a front view which shows the arrangement composition of a hydraulic circuit component. It is a hydraulic circuit diagram which shows the structure of the traveling system hydraulic circuit. It is a top view which shows the piping structure of a hydraulic circuit.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings (FIGS. 1 to 10) applied to the conventional combine harvester. FIG. 1 is a left side view of the combine, FIG. 2 is a right side view of the combine harvester, and FIG. 3 is a plan view of the combine harvester. First, the schematic structure of the combine will be described with reference to FIGS. 1 to 3. In the following description, the left side of the traveling machine 1 in the forward direction is simply referred to as the left side, and the right side in the forward direction is simply referred to as the right side.

As shown in FIGS. 1 to 3, the ordinary combine harvester in the embodiment includes a traveling machine body 1 supported by a pair of left and right crawler belts 2 made of rubber crawlers as traveling portions. On the front part of the traveling machine 1, a cutting unit 3 for taking in uncut grain culms such as rice (or wheat or soybean or tomorokoshi) while cutting is mounted on a single-acting hydraulic cylinder 4 for raising and lowering so as to be adjustable. ing.

On the left side of the traveling machine 1, a threshing section 9 for threshing the cut grain culms supplied from the cutting section 3 is mounted. A grain sorting mechanism 10 for rocking sorting and wind sorting is arranged below the threshing section 9. On the right side of the front portion of the traveling machine body 1, a driver's cab 5 on which the operator is boarded is mounted. The engine 7 as a power source is arranged in the driver's cab 5 (below the driver's seat 42). Behind the driver's cab 5 (on the right side of the traveling machine 1), there is a grain tank 6 that takes out grains from the threshing section 9, and grains that discharge grains in the grain tank 6 toward the truck bed (or container, etc.). The discharge conveyor 8 is arranged. The grain discharge conveyor 8 is tilted toward the outside of the machine, and the grains in the grain tank 6 are carried out by the grain discharge conveyor 8.

The cutting section 3 includes a feeder house 11 that communicates with the handling port 9a at the front of the threshing section 9, and a horizontally long bucket-shaped grain header 12 that is connected to the front end of the feeder house 11. The scraping auger 13 (platform auger) is rotatably supported in the grain header 12. A scraping reel 14 with a tine bar is arranged above the front portion of the scraping auger 13. A clipper-shaped cutting blade 15 is arranged at the front portion of the grain header 12. Left and right cursive scripts 16 are projected on both left and right sides of the front portion of the grain header 12. Further, a supply conveyor 17 is installed internally in the feeder house 11. A beater 18 (front rotor) for feeding cut grain culms is provided on the feed end side (handle 9a) of the supply conveyor 17. The lower surface portion of the feeder house 11 and the front end portion of the traveling machine body 1 are connected via the lifting hydraulic cylinder 4, and the cutting section 3 cuts with the cutting input shaft 89 (feeder house conveyor shaft) described later as a lifting fulcrum. It moves up and down with the lifting hydraulic cylinder 4.

With the above configuration, the tip side of the uncut grain culm between the left and right weed bodies 16 is scraped by the scraping reel 14, the culm side of the uncut grain culm is trimmed by the cutting blade 15, and the scraping auger 13 By the rotary drive, the cut grain culms are collected near the entrance of the feeder house 11 near the center of the left and right width of the grain header 12. The entire amount of the cut grain culm of the grain header 12 is conveyed by the supply conveyor 17 and is fed by the beater 18 into the handling port 9a of the threshing section 9. A horizontal control hydraulic cylinder (not shown) for rotating the grain header 12 around the horizontal control fulcrum axis is provided, and the lateral inclination of the grain header 12 is adjusted by the horizontal control hydraulic cylinder to adjust the grain header 12. It is also possible to support the cutting blade 15, the cutting blade 15, and the scraping reel 14 horizontally with respect to the field scene.

Further, as shown in FIGS. 1 and 3, the handling cylinder 21 is rotatably provided in the handling chamber of the threshing unit 9. The handling cylinder 21 is pivotally supported by the handling cylinder shaft 20 (see FIG. 4) extended in the front-rear direction of the traveling machine body 1. A receiving net 24 for leaking grains is stretched on the lower side of the handling cylinder 21. A spiral screw blade-shaped intake blade 25 is provided so as to project outward in the radial direction on the outer peripheral surface of the front portion of the handling cylinder 21.

With the above configuration, the threshing culm thrown in from the handling port 9a by the beater 18 is conveyed toward the rear of the traveling machine 1 by the rotation of the handling cylinder 21, and is transferred between the handling cylinder 21 and the receiving net 24. It is kneaded and threshed. Threshing such as grains smaller than the mesh of the receiving net 24 leaks from the receiving net 24. Straw debris and the like that do not leak from the receiving net 24 are discharged to the field from the dust outlet 23 at the rear of the threshing section 9 by the transporting action of the handling cylinder 21.

A plurality of dust feeding valves (not shown) for adjusting the transfer speed of threshing in the handling chamber are rotatably pivotally attached to the upper side of the handling cylinder 21. By adjusting the angle of the dust feed valve, the transfer speed (residence time) of threshing in the handling room can be adjusted according to the type and properties of the harvested culm. On the other hand, as the grain sorting mechanism 10 arranged below the threshing section 9, a swing sorting board 26 for specific gravity sorting having a grain pan, a chaff sheave, a grain sheave, a straw rack, and the like is provided.

Further, as the grain sorting mechanism 10, a blower fan-shaped wall insert 29 or the like that supplies sorting air to the rocking sorting board 26 is provided. The threshing that has been threshed by the handling cylinder 21 and leaked from the receiving net 24 is a grain (one of the fine grains, etc.) due to the specific gravity sorting action of the rocking sorting board 26 and the wind sorting action of the blower fan-shaped wall insert 29. It is configured to be sorted and taken out as a product), a mixture of grains and straw (second product such as a grain with a branch stem), and straw waste.

The first conveyor mechanism 30 and the second conveyor mechanism 31 are provided as the grain sorting mechanism 10 on the lower side of the rocking sorting machine 26. By sorting the rocking sorting machine 26 and the fan-shaped wall insert 29, the grains (first thing) dropped from the rocking sorting machine 26 are collected in the grain tank 6 by the first conveyor mechanism 30 and the grain raising conveyor 32. To. The mixture of grains and straw (second product) is returned to the sorting start end side of the rocking sorting plate 26 via the second conveyor mechanism 31 and the second reduction conveyor 33, and is re-sorted by the rocking sorting plate 26. Ru. Straw dust and the like are configured to be discharged to the field from the dust outlet 23 at the rear of the traveling machine body 1.

Further, as shown in FIGS. 1 to 3, the driver's cab 5 is provided with a control column 41 and a driver's seat 42 on which the operator sits. The control column 41 includes an accelerator lever 40 that adjusts the rotation speed of the engine 7, a round control handle 43 that changes the course of the traveling body 1 by the rotation operation of the operator, and a main body that switches the moving speed of the traveling body 1. A speed change lever 44, an auxiliary speed change lever 45, a cutting clutch lever 46 for driving or stopping the cutting unit 3, and a grain removal clutch lever 47 for driving or stopping the grain removal unit 9 are arranged. Further, a roof body 49 for awning is attached to the upper surface side of the front portion of the grain tank 6 via a sun visor support column 48, and the roof body 49 for awning covers the upper side of the driver's cab 5.

As shown in FIGS. 1 and 2, the left and right track frames 50 are arranged on the lower surface side of the traveling machine body 1. The track frame 50 includes a drive sprocket 51 that transmits the power of the engine 7 to the track 2, a tension roller 52 that maintains the tension of the track 2, and a plurality of track rollers 53 that hold the ground side of the track 2 in a grounded state. An intermediate roller 54 for holding the non-grounded side of the track 2 is provided. The drive sprocket 51 supports the front side of the track 2, the tension roller 52 supports the rear side of the track 2, the track roller 53 supports the ground side of the track 2, and the intermediate roller 54 supports the non-ground side of the track 2. It is configured to let.

Next, the drive structure of the combine will be described with reference to FIGS. 4 to 8. As shown in FIGS. 4 and 7, a linear hydraulic continuously variable transmission 64 for traveling speed change having a hydraulic linear pump 64a and a hydraulic linear motor 64b is provided in the transmission case 63. The engine 7 is mounted on the upper right surface of the front part of the traveling machine body 1, and the mission case 63 is arranged on the front part of the traveling body 1 on the left side of the engine 7. The output shaft 65 protruding to the left from the engine 7 and the mission input shaft 66 protruding to the left from the mission case 63 are connected via the engine output belt 67, the engine output pulley 68, and the mission input pulley 69. There is.

Further, a steering swivel hydraulic continuously variable transmission 70 having a hydraulic swivel pump 70a and a hydraulic swivel motor 70b is provided in the mission case 63, and a straight-ahead hydraulic continuously variable transmission 64 and a swivel hydraulic type are provided via a mission input shaft 66. While transmitting the output of the engine 7 to the continuously variable transmission 70, the control handle 43, the main shift lever 44, and the auxiliary shift lever 45 output the straight-moving hydraulic stepless transmission 64 and the turning hydraulic stepless transmission 70. It is configured to control and drive the left and right foot belts 2 via a straight-ahead hydraulic continuously variable transmission 64 and a swivel-swing hydraulic continuously variable transmission 70 so as to travel in a field or the like.

Further, as shown in FIGS. 4 to 6 and 8, a handling cylinder drive case 71 that pivotally supports the front end side of the handling cylinder shaft 20 is provided. The handling cylinder drive case 71 is arranged on the front side of the threshing unit 9. The handling cylinder input shaft 72 for driving the cutting unit 3 and the handling cylinder 21 is pivotally supported by the handling cylinder drive case 71. Further, a main counter shaft 76 is provided as a constant rotation shaft that penetrates to the left and right of the threshing unit 9. A working unit input pulley 83 is provided at the right end of the main counter shaft 76. The right end of the main counter shaft 76 is connected to the engine output pulley 68 on the output shaft 65 of the engine 7 via a threshing clutch 84 that also serves as a tension roller and a working unit drive belt 85.

In front of the handling cylinder 21, the handling cylinder input shaft 72 extended to the left and right of the traveling machine 1, the beater 18 arranged to the left and right of the traveling machine 1, and the cutting input shaft extending to the left and right of the traveling machine 1 89 is provided. As the handling cylinder input mechanism 90 for transmitting the driving force of the main counter shaft 76 to the handling cylinder input shaft 72, the handling cylinder drive pulleys 86 and 87 and the handling cylinder drive belt 88 are provided, and the driving force from the engine 7 is transmitted. A handling cylinder input mechanism 90 (handling cylinder drive pulleys 86 and 87 and a handling cylinder drive belt 88) is arranged at one end of the counter shaft 76 on the engine 7 side, and the handling cylinder 21 is driven to rotate constantly with a constant rotation output of the engine 7. It is configured as follows.

A beater drive mechanism and a cutting drive mechanism that transmit the driving force of the main counter shaft 76 to the beater shaft 82 and the cutting input shaft 89 are provided on the other end side of the main counter shaft 76. Further, the sub counter shaft 104 is arranged between the beater shaft 82 and the main counter shaft 76, and the power relay belt 113 is wound around the power relay pulleys 105 and 106 provided on the main counter shaft 76 and the sub counter shaft 104. It constitutes a power relay mechanism that is turned and transmits power to the cutting drive mechanism.

The cutting drive belt 114 is wound around the cutting drive pulleys 107 and 108 provided on the sub-counter shaft 104 and the beater shaft 82, respectively, to form the beater drive mechanism. Then, the cutting drive belt 114 is stretched by the cutting clutch 109 that also serves as a tension roller, so that the rotational power transmitted from the engine 7 to the main counter shaft 76 is beaten via the power relay mechanism and the beater drive mechanism. It is input to the axis 82. Further, a cutting drive mechanism is configured so as to transmit the cutting driving force from the engine 7 from the beater shaft 82 on which the beater 18 is pivotally supported to the cutting input shaft 89 via the cutting drive chain 115 and the sprockets 116 and 117. ing. As a result, the cutting unit 3 and the beater 18 are driven at a constant rotation with the constant rotation output of the engine 7.

The wall insert shaft 100, which is the rotation shaft of the wall insert 29 in the shape of a blower fan, has a hollow tube shape, and the main counter shaft 76 is interpolated in the hollow portion of the wall insert shaft 100. That is, the main counter shaft 76 and the wall insert shaft 100 have a double shaft structure, and the main counter shaft 76 and the wall insert shaft 100 are pivotally supported so as to be relatively rotatable with each other. Further, the wall insert drive belt 103 is wound around the wall insert drive pulleys 101 and 102 provided on the sub-counter shaft 104 and the wall insert shaft 100, respectively, to form the wall insert drive mechanism. Therefore, the rotational power transmitted from the engine 7 to the main counter shaft 76 is input to the beater shaft 82 via the power relay mechanism and the wall insert drive mechanism, and the wall insert 29 is driven to rotate at a constant rotation output of the engine 7.

Further, the machine housing 9b of the threshing machine 9 has a cutting support frame 36 installed on the upper surface side of the front portion of the threshing machine housing column 34 on the upper surface side of the traveling machine body 1. The cutting bearing body 37 is attached to the front right side of the cutting support frame body 36, and the forward / reverse switching case 121 described later is attached to the front left side of the cutting support frame body 36. Then, via the cutting bearing body 37 and the forward / reverse switching case 121, the cutting input shaft 89 is rotatably supported on the front side of the cutting support frame body 36 in the left-right direction of the traveling machine body 1, and the cutting support frame body 36 is supported. A beater shaft 82 (beater 18) facing left and right is rotatably supported inside the beater bearing body 38. Further, the handling cylinder drive case 71 is attached to the upper surface side of the cutting support frame body 36, and the handling cylinder input shaft 72 is pivotally supported by the handling cylinder drive case 71.

On the other hand, a left-right cutting input shaft 89 for driving the supply conveyor 17 in the feeder house 11 is provided. The cutting driving force transmitted from the engine 7 to one end on the engine 7 side of the main counter shaft 76 is transmitted from the other end of the main counter shaft 76 on the opposite side of the engine 7 to the forward / reverse transmission of the cutting forward / reverse switching case 121. It is transmitted to the shaft 122. The cutting input shaft 89 is driven via the forward rotation bevel gear 124 or the reverse rotation bevel gear 125 of the cutting forward / reverse switching case 121.

Further, a left-right facing handling cylinder input shaft 72 is provided on the front side of the threshing portion 9, and the driving force transmitted from the engine 7 to one end on the engine 7 side of the main counter shaft 76 is applied to one end on the engine 7 side of the handling cylinder input shaft 72. It is transmitted to the department. Further, the handling cylinder input shaft 72 provided on the front side of the threshing unit 9 is arranged in the left-right direction of the traveling machine body 1, while the handling cylinder 21 is pivotally supported by the handling cylinder shaft 20 arranged in the front-rear direction of the traveling machine body 1. The front end side of the handling cylinder shaft 20 is connected to the left and right other ends of the handling cylinder input shaft 72 opposite to the engine 7 via a bevel gear mechanism 75. The driving force of the engine 7 is transmitted to the grain sorting mechanism 10 or the cutting section 3 for sorting the grains after threshing from the left and right other ends of the main counter shaft 76 opposite to the engine 7. ..

That is, the right end of the handling cylinder input shaft 72 is connected to the right end of the main counter shaft 76 on the side closer to the engine 7 via the handling cylinder drive pulleys 86 and 87 and the handling cylinder drive belt 88. The front end side of the handling cylinder shaft 20 is connected to the left end portion of the handling cylinder input shaft 72 extending in the left-right direction via the bevel gear mechanism 75. The power of the engine 7 is transmitted from the right end of the main counter shaft 76 to the front end side of the handling cylinder shaft 20 via the handling cylinder input shaft 72, and the handling cylinder 21 is rotationally driven in one direction. On the other hand, the driving force of the engine 7 is transmitted from the left end portion of the main counter shaft 76 to the grain sorting mechanism 10 arranged below the threshing portion 9.

Further, the left end of the first conveyor shaft 77 of the first conveyor mechanism 30 and the left end of the second conveyor shaft 78 of the second conveyor mechanism 31 are connected to the left end of the main counter shaft 76 via the conveyor drive belt 111. The ends are connected. The left end of the second conveyor shaft 78 is connected to the left end of the crank-shaped swing drive shaft 79 that pivotally supports the rear portion of the swing sorting board 26 via the swing sorting belt 112. That is, the threshing clutch 84 is turned on and off by the operator's operation of the threshing clutch lever 47. Each part of the grain sorting mechanism 10 and the handling cylinder 21 are driven by the engagement operation of the threshing clutch 84.

The fried grain conveyor 32 is driven via the first conveyor shaft 77, and the first sorted grain of the first conveyor mechanism 30 is collected in the grain tank 6. Further, the second reduction conveyor 33 is driven via the second conveyor shaft 78, and the second sorting grain (second product) mixed with straw waste of the second conveyor mechanism 31 is on the upper surface side of the swing sorting board 26. Returned to. Further, in a structure in which a spreader (not shown) for scattering straw dust is provided at the dust discharge port 23, the spreader is provided with a spreader drive pulley (not shown) and a spreader drive belt (not shown) to the spreader on the left side of the main counter shaft 76. Connect the ends.

A cutting input shaft 89 is provided as a conveyor input shaft that supports the feed end side of the supply conveyor 17. The header drive shaft 91 is rotatably supported on the back side of the right side of the grain header 12. The left end of the forward / reverse transmission shaft 122 is connected to the left end of the beater shaft 82 via the cutting drive chain 115 and the sprockets 116 and 117, and the cutting input shaft 89 is transmitted forward / reverse via the forward / reverse switching case 121. It is connected to the shaft 122. Further, the right end portion of the cutting input shaft 89 is connected to the left end portion of the header drive shaft 91 extending in the left-right direction via the header drive chain 118 and the sprockets 119 and 120. A scraping shaft 93 that pivotally supports the scraping auger 13 is provided. An intermediate portion of the header drive shaft 91 is connected to the right side portion of the scraping shaft 93 via a scraping drive chain 92.

Further, a reel shaft 94 that pivotally supports the scraping reel 14 is provided. The right end of the suction shaft 93 is connected to the right end of the reel shaft 94 via an intermediate shaft 95 and reel drive chains 96 and 97. A cutting blade 15 is connected to the right end of the header drive shaft 91 via a cutting blade drive crank mechanism 98. The supply conveyor 17, the scraping auger 13, the scraping reel 14, and the cutting blade 15 are driven and controlled by the on / off operation of the cutting clutch 109 so that the tip side of the uncut grain culm in the field is continuously cut. It is configured in.

A forward rotation bevel gear 124 integrally formed with the forward / reverse rotation transmission shaft 122, a reverse rotation bevel gear 125 rotatably supported by the cutting input shaft 89, and an intermediate bevel gear 126 for connecting the reverse rotation bevel gear 125 to the forward rotation bevel gear 124. , It is installed internally in the forward / reverse switching case 121. The intermediate bevel gear 126 is always meshed with the forward rotation bevel gear 124 and the reverse rotation bevel gear 125. On the other hand, the slider 127 is slidably supported on the cutting input shaft 89 by the spline engaging shaft. The slider 127 is disengaged and engageable with the forward rotation bevel gear 124 via the claw clutch-shaped forward rotation clutch 128, and the slider 127 is engaged with the reverse rotation bevel gear 125 via the claw clutch-shaped reverse rotation clutch 129. It is configured so that it can be disengaged and engaged.

Further, a forward / reverse switching shaft 123 for sliding the slider 127 is provided, a forward / reverse switching arm 130 is provided on the forward / reverse switching shaft 123, and the forward / reverse switching arm 130 is operated by operating the forward / reverse switching lever 212 (forward / reverse operating tool). The forward / reverse rotation switching shaft 123 is rotated, the slider 127 is brought into contact with the forward rotation bevel gear 124 or the reverse rotation bevel gear 125, and the forward rotation bevel gear 124 or the reverse rotation is performed via the forward rotation clutch 128 or the reverse rotation clutch 129. The slider 127 is selectively engaged with the bevel gear 125, and the cutting input shaft 89 is connected to the forward / reverse transmission shaft 122 in the forward or reverse direction.

The structure includes a forward / reverse switching case 121 as a forward / reverse switching mechanism for driving the supply conveyor 17 in the forward or reverse direction, and the supply conveyor 17 is connected to the beater shaft 82 via the forward / reverse switching case 121. Therefore, the supply conveyor 17 of the feeder house 11 can be reversed by the reverse switching operation of the forward / reverse switching case 121, and the clogged straw in the feeder house 11 can be quickly removed.

The right end of the auger drive shaft 158 is connected to the output shaft 65 of the engine 7 via a tension pulley-shaped auger clutch 156 and an auger drive belt 157. The lateral feed auger 160 front end side of the bottom of the grain tank 6 is connected to the left end of the auger drive shaft 158 via the bevel gear mechanism 159. The vertical feed auger 162 of the grain discharge conveyor 8 is connected to the rear end side of the horizontal feed auger 160 via the bevel gear mechanism 161 and the grain of the grain discharge conveyor 8 is connected to the upper end side of the vertical feed auger 162 via the bevel gear mechanism 163. The grain discharge auger 164 is connected. In addition, a grain discharge lever 155 for turning on and off the auger clutch 156 is provided. A grain discharge lever 155 is attached to the rear of the driver's seat 42 and to the front of the grain tank 6, so that the operator can operate the grain discharge lever 155 from the driver's seat 42 side.

Next, the power transmission structure of the mission case 63 and the like will be described with reference to FIGS. 4 and 7. As shown in FIGS. 4 and 7, the transmission case 63 includes a pair of linearly variable transmissions 64a and a pair of linearly variable transmissions 64b for linearly variable transmission (main speed change) and a pair of swivel pumps 70a. And a hydraulic continuously variable transmission 70 for turning having a turning motor 70b is provided. The transmission shafts 66 of the mission case 63 are gear-connected to the pump shafts 258 and 259 of the straight-ahead pump 64a and the swivel pump 70a, respectively. The engine output belt 67 is hung around the mission input pulley 69 on the mission input shaft 66. The output of the engine 7 is transmitted to the transmission input pulley 69 via the engine output belt 67 to drive the straight-ahead pump 64a and the swivel pump 70a.

The driving force output from the output shaft 65 of the engine 7 is transmitted to the pump shaft 258 of the linear pump 64a and the pump shaft 259 of the swivel pump 70a, respectively, via the engine output belt 67 and the transmission input shaft 66. In the straight-ahead hydraulic continuously variable transmission 64, hydraulic oil is appropriately sent from the straight-ahead pump 64a to the straight-ahead motor 64b by the power transmitted to the pump shaft 258. Similarly, in the swivel hydraulic continuously variable transmission 70, hydraulic oil is appropriately sent from the swivel pump 70a toward the swivel motor 70b by the power transmitted to the pump shaft 259.

A transmission charge pump 151 for supplying hydraulic oil to the hydraulic pumps 64a and 70a and the hydraulic motors 64b and 70b is attached to the pump shaft 259. The straight-ahead hydraulic continuously variable transmission 64 changes and adjusts the inclination angle of the swash plate in the straight-ahead pump 64a according to the amount of operation of the main speed change lever 44 and the control handle 43 arranged in the control column 41, and is a straight-ahead motor. By changing the discharge direction and the discharge amount of the hydraulic oil to the 64b, the rotation direction and the rotation speed of the straight-moving motor shaft 260 protruding from the straight-moving motor 64b are arbitrarily adjusted.

The rotational power of the linear motor shaft 260 is transmitted from the linear transmission gear mechanism 250 to the auxiliary transmission gear mechanism 251. The auxiliary transmission gear mechanism 251 includes an auxiliary transmission low speed gear 254, an auxiliary transmission medium speed gear 255, and an auxiliary transmission high speed gear 256 that are switched by the auxiliary transmission shifters 252 and 253. By operating the auxiliary shift lever 45 arranged on the control column 41, the output rotation speed of the straight-ahead motor shaft 260 is configured to be selectively switched to three stages of low speed, medium speed, or high speed. .. It should be noted that there is a neutral position (a position where the output of the auxiliary transmission becomes zero) between the low speed, the medium speed, and the high speed of the auxiliary transmission.

A drum-type parking brake 266 is provided on the parking brake shaft 265 (secondary transmission output shaft) provided on the output side of the auxiliary transmission gear mechanism 251. The rotational power from the auxiliary transmission gear mechanism 251 is transmitted from the auxiliary transmission output gear 267 fixed to the parking brake shaft 265 to the left and right differential mechanisms 257. The left and right differential mechanisms 257 are each provided with a planetary gear mechanism 268. Further, a straight-ahead pulse generating rotary wheel 292 is provided on the parking brake shaft 265, and a straight-ahead vehicle speed sensor (not shown) is configured to detect the number of rotations of the straight-ahead output (straight-ahead vehicle speed = shift output of the auxiliary shift output gear 267). doing.

The left and right planetary gear mechanisms 268 enable one sun gear 271, a plurality of planetary gears 272 that mesh with the sun gear 271, a ring gear 273 that meshes with the planet gear 272, and a plurality of planetary gears 272 to rotate on the same circumference. Each includes a carrier 274 to be arranged. The carriers 274 of the left and right planetary gear mechanisms 268 are arranged so as to face each other on the same axis at appropriate intervals. The center gear 276 is fixed to the sun gear shaft 275 provided with the left and right sun gears 271.

The left and right ring gears 273 are concentrically arranged on the sun gear shaft 275 in a state where the internal teeth on the inner peripheral surface thereof are meshed with the plurality of planetary gears 272. Further, the outer teeth on the outer peripheral surfaces of the left and right ring gears 273 are connected to the steering output shaft 285 via intermediate gears 287 and 288 for left and right turning output, which will be described later. Each ring gear 273 is rotatably supported by left and right forced differential output shafts 277 protruding left and right outward from the outer surface of the carrier 274. The left and right axles 278 are connected to the left and right forced differential output shafts 277 via final gears 278a and 278b. Left and right drive sprockets 51 are attached to the left and right axles 278. Therefore, the rotational power transmitted from the auxiliary transmission gear mechanism 251 to the left and right planetary gear mechanisms 268 is transmitted from the left and right axles 278 to each drive sprocket 51 at the same rotation speed in the same direction, and the left and right crests 2 are in the same direction. Drives at the same number of rotations to move the traveling machine body 1 straight (forward, backward).

The swing hydraulic continuously variable transmission 70 changes and adjusts the tilt angle of the swash plate in the swing pump 70a according to the amount of rotation of the main speed change lever 44 and the control handle 43 arranged on the control column 41. By changing the discharge direction and the discharge amount of the hydraulic oil to the swivel motor 70b, the rotation direction and the rotation speed of the swivel motor shaft 261 protruding from the swivel motor 70b are arbitrarily adjusted. Further, a turning pulse generating rotating wheel 294 is provided on the steering counter shaft 280, which will be described later, and a turning rotation sensor (turning vehicle speed sensor) (not shown) is used to rotate the steering output of the turning motor 70b (turning vehicle speed). Is configured to detect.

Further, in the transmission case 63, a wet multi-plate swivel brake 279 (steering brake) provided on the swivel motor shaft 261 (steering input shaft) and a reduction gear 281 on the swivel motor shaft 261 are interposed. Left input for connecting the steering counter shaft 280 to be connected, the steering output shaft 285 to be connected to the steering counter shaft 280 via the reduction gear 286, and the steering output shaft 285 to be connected to the left ring gear 273 via the reverse gear 284. A gear mechanism 282 and a right input gear mechanism 283 that connects the steering output shaft 285 to the right ring gear 273 are provided. The rotational power of the swivel motor shaft 261 is transmitted to the steering counter shaft 280. The rotational power transmitted to the steering counter shaft 280 is transmitted to the left ring gear 273 as reverse rotation power via the left intermediate gear 287 and the reverse gear 284 on the steering output shaft 285 in the left input gear mechanism 282. On the other hand, it is transmitted to the right ring gear 273 as forward rotation power via the right intermediate gear 288 on the steering output shaft 285 in the right input gear mechanism 283.

When the auxiliary transmission gear mechanism 251 is set to neutral, power transmission from the straight motor 64b to the left and right planetary gear mechanisms 268 is blocked. Power is transmitted from the auxiliary transmission gear mechanism 251 to the left and right planetary gear mechanisms 268 from the straight motor 64b via the auxiliary transmission low speed gear 254, the auxiliary transmission medium speed gear 255, or the auxiliary transmission high speed gear 256 at the time of auxiliary transmission output other than neutral. .. On the other hand, when the output of the swivel pump 70a is set to the neutral state and the swivel brake 279 is turned on, the power transmission from the swivel motor 70b to the left and right planetary gear mechanisms 268 is blocked. When the output of the swivel pump 70a is set to a state other than neutral and the swivel brake 279 is turned off, the rotational power of the swivel motor 70b is transmitted to the left ring gear 273 via the left input gear mechanism 282 and the reverse gear 284. On the other hand, it is transmitted to the right ring gear 273 via the right input gear mechanism 283.

As a result, at the time of forward rotation (reverse rotation) of the swivel motor 70b, the left ring gear 273 reverses (forward rotation) and the right ring gear 273 rotates forward (reverse) at the same rotation speed in opposite directions. That is, the shift output from each of the motor shafts 260 and 261 is transmitted to the drive sprockets 51 of the left and right crawler belts 2 via the auxiliary transmission gear mechanism 251 or the differential mechanism 257, respectively, and the vehicle speed (traveling) of the traveling machine 1 is transmitted. Speed) and direction of travel are determined.

That is, when the linear motor 64b is driven in a state where the swivel motor 70b is stopped and the left and right ring gears 273 are stationary and fixed, the rotational output from the linear motor shaft 260 is transmitted to the left and right sun gears 271 at the same rotation speed on the left and right, and the planet. The left and right foot belts 2 are driven at the same rotation speed in the same direction via the gear 272 and the carrier 274, and the traveling machine body 1 travels straight.

On the contrary, when the swivel motor 70b is driven while the straight motor 64b is stopped and the left and right sun gears 271 are statically fixed, the left ring gear 273 rotates in the forward direction (reverse) by the rotational power from the swivel motor shaft 261. Rotate), and the right ring gear 273 rotates in the reverse direction (forward rotation). As a result, one of the drive sprockets 51 of the left and right crawler belts 2 rotates forward and the other rotates backward, and the traveling machine body 1 is changed in direction (reliable turn spin turn) on the spot.

Further, by driving the left and right ring gears 273 by the swivel motor 70b while driving the left and right sun gears 271 by the straight-ahead motor 64b, a difference in speed is generated between the left and right crawler belts 2, and the traveling machine body 1 makes a turn while moving forward or backward. Turn left or right (U-turn) with a turning radius larger than the radius. The turning radius at this time is determined according to the speed difference between the left and right tracks 2. The running driving force of the engine 7 is constantly transmitted to the left and right crawler belts 2 and the engine 7 turns to the left or right.

Next, the working system hydraulic circuit 180 and the traveling system hydraulic circuit 200 in the conventional combine of the present embodiment will be described with reference to FIGS. 9 to 16. As shown in FIGS. 9 to 14, the work system hydraulic circuit 180 includes a cutting lifting hydraulic cylinder 4 and left and right reel lifting hydraulic cylinders 27L and 27R that support the suction reel 14 so as to be liftable as hydraulic actuators. The auger lifting hydraulic cylinder 55 that supports the grain discharge auger 164 so as to be able to move up and down, the left and right machine body raising and lowering hydraulic cylinders 56L and 56R that raise and lower the traveling machine 1, the hydraulic oil tank 57 that stores the hydraulic oil, and the hydraulic oil. It includes a hydraulic pump 59 connected to the tank 57 via an oil filter 58, and hydraulic valves 60A to 60E for switching the flow of hydraulic oil. The hydraulic valves 60A to 60E are incorporated in the hydraulic valve unit 60 mounted on the traveling machine body 1.

The hydraulic pump 59 is hydraulically connected to the cutting lifting hydraulic cylinder 4 via the cutting raising / lowering hydraulic valve 60A. By tilting the cutting posture lever (not shown) in the operation unit (cab) 5 in the front-rear direction, the hydraulic cylinder 4 for raising and lowering the cutting is operated, and the operator sets the cutting unit 3 to an arbitrary height (for example, the cutting work height). Or it is configured to move up and down to non-working height, etc.). On the other hand, the work hydraulic pump 59 is hydraulically connected to the reel lifting hydraulic cylinders 27L and 27R via the reel raising / lowering hydraulic valve 60B. By tilting the cutting posture lever (not shown) in the left-right direction, the reel lifting hydraulic cylinders 27L and 27R are operated, and the operator moves the suction reel 14 up and down to an arbitrary height to move the uncut grains in the field. It is configured to mow the culm.

The work hydraulic pump 59 is hydraulically connected to the auger lifting hydraulic cylinder 55 via the auger lifting hydraulic valve 60C. By tilting the grain discharge lever 155 in the operation unit (cab) 5 in the front-rear direction, the hydraulic cylinder 55 for raising and lowering the auger is operated, and the operator operates the paddy throwing port of the grain discharge auger 164 in the grain discharge conveyor 8. To move up and down to any height. The electric motor 165 rotates the grain discharge auger 164 in the horizontal direction together with the vertical feed auger 162 and the bevel gear mechanism 163 to move the paddy throwing port in the horizontal direction. That is, the paddy throwing port is located above the truck bed or container, and the grains in the grain tank 6 are discharged into the truck bed or container.

The hydraulic oil tank 57 and the work hydraulic pump 59 are hydraulically connected to the left machine body lifting hydraulic cylinder 56L via the left machine body lifting hydraulic valve 60D. On the other hand, the hydraulic oil tank 57 and the work hydraulic pump 59 are hydraulically connected to the right machine body lifting hydraulic cylinder 56R via the right machine body lifting hydraulic valve 60E. By operating the left and right hydraulic cylinders 56L and 56R for raising and lowering the machine body independently of each other, the left and right sides of the traveling machine body 1 are raised and lowered independently.

Therefore, when the hydraulic cylinders 56L and 56R for raising and lowering the airframes on both the left and right sides are operated at the same time and the left and right track frames 50 and 50 are lowered with respect to the traveling airframe 1 at the same time, the traveling airframe 1 The relative height (vehicle height) of the traveling machine body 1 with respect to the track 2 and 2 ground contact portions becomes higher. On the contrary, when the left and right track frames 50 and 50 are raised with respect to the traveling machine 1 at the same time, the traveling body 1 approaches (descends) the tracks 2 and 2 on both the left and right sides and descends, and the track 2 of the traveling body 1 , 2 The relative height (vehicle height) with respect to the ground contact part becomes low.

Then, the left machine body elevating hydraulic cylinder 56L is operated to lower the left track frame 50 with respect to the traveling machine body 1, or the right body body raising / lowering hydraulic cylinder 56R is operated to raise the right track frame 50 with respect to the traveling machine body 1. And (or even if both of these operations are executed at the same time), the traveling aircraft 1 tilts downward to the right. On the contrary, the right truck frame 50 is lowered with respect to the traveling machine 1 by operating the right hydraulic cylinder 56R for raising and lowering the machine, or the right track frame 50 is lowered with respect to the traveling machine 1 by operating the hydraulic cylinder 56L for raising and lowering the left machine. When raised (or even if both of these operations are performed at the same time), the traveling aircraft 1 tilts downward to the left.

The hydraulic oil tank 57, the hydraulic pump 59, and the hydraulic valve unit 60 are mounted on the traveling machine body 1, and are connected to each other via hydraulic pipes 181 to 183. On the traveling machine body 1, the hydraulic oil tank 57 is installed on the front left side, while the hydraulic pump 59 is fixed to the front surface of the engine 7 mounted on the front right side, and the oil filter 58 and the oil pressure contained in the hydraulic oil tank 57 are installed. The pump 59 is connected to the pump 59 by a hydraulic pipe 181. Further, the hydraulic valve unit 60 is arranged at a position behind the engine 7 on the traveling machine body 1, and the discharge side of the hydraulic pump 59 is connected to the hydraulic valve unit 60 via the hydraulic pipe 182. Further, the hydraulic valve unit 60 is connected to the hydraulic oil tank 57 via a hydraulic pipe 183 that serves as a hydraulic oil return pipe.

The hydraulic oil tank 57 is installed on the traveling machine body 1 at a space position surrounded by the feeder house 11 and the beater 18, and the engine 7 and the hydraulic oil tank 57 are arranged side by side in front of the traveling machine body 1. There is. That is, the hydraulic oil tank 57 is arranged in the space surrounded by the feeder house 11 and the machine housing of the threshing section 9, and dust from the cutting section 3 can be suppressed from accumulating in the hydraulic oil tank 57. Contamination of hydraulic oil due to intrusion of dust from the fuel filler port 184 and the like can also be prevented. Further, since the cooling air from the engine 7 flows into the installation space of the hydraulic oil tank 57, it is possible to suppress an increase in the hydraulic oil temperature without providing an oil cooler on the working system hydraulic circuit 180, and each hydraulic member can be used. Can be driven properly.

The hydraulic oil tank 57 has an oil filler port 184 projecting toward the left side (outside the machine) on the left side (outside side of the machine), and has an oil filter 58 that can be inserted and removed from the left side. Therefore, the oil filler port 184 and the oil filter 58 can be easily accessed by removing the threshing cover 185 provided on the left side (outside the machine) of the threshing unit 9. Therefore, the refueling work of the hydraulic oil tank 57 and the replacement work of the oil filter 58 can be facilitated, and the maintainability of the work system hydraulic circuit 180 can be improved.

Further, the hydraulic pipes 181, 183 connected to the hydraulic oil tank 57 are piped so as to extend in front of the hydraulic oil tank 57 and the engine 7 to the left and right, and the hydraulic pipe 182 is arranged in front of the engine 7 with the hydraulic pump 59 and oil. It communicates with the filter 58. That is, the hydraulic pipes 181, 183 bypass the front of the engine 7 and extend toward the hydraulic oil tank 57 along the output shaft 65 of the engine 7. Further, the hydraulic pipes 182 and 183 are extended rearward through the lower part of the cooling fan provided on the right side of the engine 7 and are connected to the hydraulic valve unit 60. Therefore, the hydraulic pipes 181 to 183 are arranged so that the length of the pipeline is shortened at a position where they are not easily affected by the radiant heat from the engine 7, and the temperature of the hydraulic oil flowing through the hydraulic pipes is suppressed from rising. it can.

As shown in FIGS. 14 to 16, the traveling system hydraulic circuit 200 includes a straight-ahead pump 64a, a straight-ahead motor 64b, a swivel pump 70a, a swivel motor 70b, a transmission charge pump 151, an oil filter 152, and an oil cooler 153. .. The linear pump 64a and the linear motor 64b in the linear hydraulic continuously variable transmission 64 are connected in a closed loop by a linear oil closing passage 201. On the other hand, the swivel pump 70a and the swivel motor 70b in the swivel hydraulic continuously variable transmission 70 are connected in a closed loop by a swivel oil passage 202. By driving the straight-ahead pump 64a and the swivel pump 70a with the rotational power of the engine 7 and controlling the angle of the slant plate of the straight-ahead pump 64a and the swivel pump 70a, the discharge direction and discharge of hydraulic oil to the straight-ahead motor 64b and the swivel motor 70b The amount is changed, and the straight-ahead motor 64b and the swivel motor 70b operate in the forward and reverse directions.

The traveling system hydraulic circuit 200 is provided with a straight-ahead valve 203 that switches and operates in response to a manual operation of the main speed change lever 44, and a straight-ahead cylinder 204 that is connected to the transmission charge pump 151 via the straight-ahead valve 203. When the linear valve 203 is switched and operated, the linear cylinder 204 operates to change the swash plate angle of the linear pump 64a, and the rotation speed of the linear motor shaft 260 of the linear motor 64b is steplessly changed or reversed. A straight-ahead shift operation is executed.

The traveling hydraulic circuit 200 includes a swivel valve 206 that switches and operates in response to a manual operation of the steering handle 43, and a swivel cylinder 207 that is connected to the transmission charge pump 151 via the swivel valve 206. When the swivel valve 206 is switched and operated, the swivel cylinder 207 operates to change the angle of the tilt plate of the swivel pump 70a, and the rotation speed of the swivel motor shaft 261 of the swivel motor 70b is steplessly changed or reversed. The left-right turning operation is executed, and the traveling machine 1 changes the traveling direction to the left and right to change the direction or correct the course at the field headland.

The suction side of the transmission charge pump 151 is connected to the strainer 217 in the transmission case 63 via the hydraulic pipe 208. A charge introduction oil passage 218 is connected to the discharge side of the transmission charge pump 151 via a hydraulic pipe 209, and an oil filter 152 is installed in the middle of the hydraulic pipe 209. A charge branch oil passage 219 connected to both closed oil passages 201 and 202 is connected to the downstream side of the charge introduction oil passage 218. Therefore, while the engine 7 is being driven, the hydraulic oil from the transmission charge pump 151 is constantly replenished in both the closed oil passages 201 and 202.

Further, the charge branch oil passage 219 is connected to the straight cylinder 204 via the straight valve 203 and is connected to the swivel cylinder 207 via the swivel valve 206. Further, the charge branch oil passage 219 is connected to the mission case 63 via the surplus relief valve 220 and the hydraulic pipe 210, and the oil cooler 153 is installed in the middle of the hydraulic pipe 210. Therefore, when the excess hydraulic oil from the transmission charge pump 151 is returned to the transmission case 63 via the surplus relief valve 220, it is cooled by the oil cooler 153.

Next, the engine room 146 in which the engine 7 is installed will be described with reference to FIGS. 8, 13, 14, and the like. As shown in FIGS. 8, 13 and 14, a pair of left and right engine room columns 147 are erected on the rear side of the driver's cab 5 on the upper surface of the traveling machine body 1, and a back plate body 148 is placed between the left and right engine room columns 147. It is stretched to cover the rear of the engine room 146 below the driver's seat 42. Further, a box-shaped wind tunnel case 170 is erected on a right engine room column 147 provided at the right end of the driver's cab 5 in the traveling machine body 1 via an opening / closing fulcrum shaft 171. A dust net is installed in the opening on the right side of the wind tunnel case 170 on the outside of the machine, and the presence of the dust net prevents straw dust and the like from entering the inside of the wind tunnel case 170 and the engine room 146.

A water cooling radiator 154 is erected inside the wind tunnel case 170 on the upper surface side of the traveling machine body 1, and the radiator 154 is confronted with the cooling fan 149 of the engine 7. A shroud 150 is installed so as to cover the entire ventilation range of the radiator 154, and the cooling fan 149 is arranged in the opening formed in the shroud 150. Further, an oil cooler 153 is installed in the wind tunnel case 170. By rotating the cooling fan 149, outside air (cooling air) is taken into the wind tunnel case 170 from the outside opening on the right side of the wind tunnel case 170, and dust-removed cooling air is taken into the engine room 146 from the inside opening on the left side of the wind tunnel case 170. Send to. As a result, the oil cooler 153, the radiator 154, the engine 7, and the like are cooled by the cooling air flowing into the engine room 146.

Next, the configuration around the cutting support frame 36, which is a part of the machine housing 9b of the threshing unit 9, will be described with reference to FIGS. 5, 6, 8, and 11 to 14. As shown in FIGS. 5, 6, 8 and 11 to 14, the cutting support frame 36 stands above the upper surface of the traveling machine 1 at the front positions of the left and right threshing machine housing columns (rear column frames) 34. The left and right cutting support columns (front column frames) 36a, and the upper and lower cutting support frame beam frames 36b and 36c that connect the left and right threshing machine housing columns 34 and the left and right cutting support columns 36a in the front-rear direction. Have. The beam frames 36b and 36c for the cutting support frame are erected at the upper ends and the middle portions of the cutting support columns 36a and the threshing machine housing columns 34 arranged in the front-rear direction.

Both ends of the left and right beater bearing bodies 38 are connected to the middle part of the beam frames 36b and 36c for the upper and lower cutting support frames provided on the left and right, and the beater 18 is pivotally supported in the cutting support frame body 36 by the left and right beater bearing bodies 38. Will be done. The cutting support frame 36 is provided with side plates 186 covering the left and right sides of the beater 18, a top plate 187 covering the upper side of the beater 18, a front plate 188 covering the front surface of the beater 18, and a bottom plate 189 covering the lower side of the beater 18. That is, the cutting support frame 36 has a closed space above the lower beam frame 36c that allows the rear end of the feeder house 11 and the handling port 9a to communicate with each other. Then, a beater 18 for smoothly guiding the grain rod from the supply conveyor 17 to the handling port 9a is installed in the closed space.

The side plate 186 is installed so as to seal the area surrounded by the columns 34, 36a and the beam frames 36b, 36c, and the beater shaft 82 is pivotally supported by the beater bearing body 38 arranged outside the side plate 186. Has a hole through which. The top plate 187 is erected on the left and right beam frames 36b, and the handling cylinder drive case 71 is installed on the upper surface thereof. The front plate 188 has a top plate 187 front edge and an upper edge connected to each other and extends downward toward the upper side of the feeder house 11. The front edge of the bottom plate 189 is connected to the trailing edge of the bottom plate 190 of the feeder house 11, the trailing edge of the bottom plate 189 is connected to the front edge of the bottom plate 9a in front of the handling cylinder 21, and the bottom plate 189 is connected to the feeder house 11. Acts as a guide plate for the grain rod from the to the handle 9a.

The hydraulic oil tank 57 is installed in the space below the beater 18 installation space of the cutting support frame body 36, and the upper part of the hydraulic oil tank 57 is covered with the bottom plate 189. Further, the front surface of the hydraulic oil tank 57 is covered with a front cover plate 191 connected to the bottom plate 189. A fan-shaped wall insert 29 is provided behind the hydraulic oil tank 57, and the outer circumference of the wall insert 29 is covered with a wall insert cover plate 192. Therefore, in the cutting support frame 36, the hydraulic oil tank 57 is installed in the space surrounded by the bottom plate 189, the front cover plate 191 and the wall insert cover plate 192.

The hydraulic oil tank 57 installation space provided by the bottom plate 189, the front cover plate 191 and the wall insert cover plate 192 constitutes a passage that is open on the left and right, and communicates with the engine room 146 on the right side. Further, the machine housing 9b of the threshing unit 9 is provided with left and right threshing side plates 193, and the leading edge of the right threshing side plate 193 is fixed to the right threshing machine housing column 34 located in front of the engine room column 147. .. Therefore, a part of the cooling air taken in from the outside air from the cooling fan 149 passes through the engine room 146 and flows into the hydraulic oil tank 57 installation space in the cutting support frame 36 to cool the hydraulic oil tank 57.

Further, a part of the cooling air passing through the engine room 146 flows into the air passage by the wall insert cover plate 192 behind the installation space of the hydraulic oil tank 57 by the rotation of the wall insert 29. As a result, an air flow flowing in the front-rear direction is formed in the space between the engine room 146 and the threshing section 9, so that the outside air flows in from the front of the traveling machine body 1 by being guided by the air flow in the front-rear direction. The outside air flows into the hydraulic oil tank 57 installation space from the front of the traveling machine body 1, and cools the hydraulic oil tank 57 together with a part of the cooling air from the engine room 146. That is, since the exhaust air from the engine 7 actively flows to the wall insert 29 side, the outside air flows into the hydraulic oil tank 57 installation space together with a part of the cooling air of the engine 7, and the cooling effect of the hydraulic oil tank 57 is enhanced. Increase.

As described above, by configuring the cooling air from the engine room 146 to pass through the hydraulic oil tank 57, it is possible to prevent the temperature of the working oil circulating in the work system hydraulic circuit 180 including the hydraulic oil tank 57 from rising. it can. Therefore, it is not necessary to provide an oil cooler in the working hydraulic circuit 180, and by making the working hydraulic circuit 180 and the traveling hydraulic circuit 200 separate systems, the oil cooler 153 is provided only in the traveling hydraulic circuit 200. It can be configured to be provided. As a result, the capacity of the oil cooler 153 can be reduced, and the cooling efficiency of the radiator 154 and the engine 7 located downstream of the oil cooler 153 in the cooling air flow can be improved.

Further, the sub-counter shaft 104 that receives the driving force from the engine 7 is pivotally supported by the threshing machine housing column (rear column frame) 34, and the beater bearing body 38 is connected to the beam frames 36b and 36c for the vertical cutting support frame. The beater shaft 82 is pivotally supported. A cutting input shaft 89 pivotally supported at a position in front of the cutting support support support column (front support column frame) 36a penetrates the feeder house 11. The first power transmission mechanism (the beater drive mechanism by the drive pulleys 107 and 108 and the cutting drive belt 114) that transmits the rotational power of the secondary counter shaft 104 to the beater shaft 82 and the rotational power of the beater shaft 82 are transmitted to the cutting input shaft 89. A second power transmission mechanism (cutting drive chain 115 and cutting drive mechanism by sprockets 116 and 117) is provided. Then, the oil supply port 184 of the hydraulic oil tank 57 and the oil filter 58 are arranged in the area surrounded by the first and second power transmission mechanisms and the front cutting support column 36a. As a result, the hydraulic oil tank 57 can be refueled and the oil filter 58 can be replaced without removing the transmission material (chain or belt) in the first and second power transmission mechanisms. Therefore, the work system hydraulic circuit 180 Maintainability can be improved.

Further, the threshing unit 9 pivotally supports the wall insert 29 on the rear side of the threshing machine housing column (rear column frame) 34, and the main counter shaft 76 that can rotate relative to the wall insert shaft 100 of the wall insert 29 is the wall insert shaft 100. It penetrates the inside. Then, the main counter shaft 76 receives the power from the engine 7 and transmits the power to the sub counter shaft 104, and the rotational power of the sub counter shaft 104 is branched and transmitted to each of the wall insert shaft 100 and the beater shaft 82. The drive system for driving the cutting section 3, the grain sorting mechanism 10, and the wall insert 29 is concentrated on the left side (outside of the machine) of the threshing section 9, so that the right side (inside of the machine) of the threshing section 9 is installed. The front can be opened. Therefore, the right side of the hydraulic oil tank 57 installation space on the lower front side of the threshing portion 9 can be opened, and a large amount of cooling air can be guided to the hydraulic oil tank 57 installation space.

1 Traveling machine 3 Cutting part 5 Driver's cab 7 Engine 9 Threshing part 9a Handling port 9b Machine housing 11 Feeder house 17 Supply conveyor 18 Beater 21 Handling body 29 Wall insert 34 Threshing machine case support 35 Cutting support frame body 36a Cutting support frame support 36b Beam frame for cutting support frame 36c Beam frame for cutting support frame 37 Cutting bearing body 38 Beater bearing body 57 Hydraulic oil tank 58 Oil filter 59 Hydraulic pump 63 Mission case 76 Wall insert shaft (constant rotation shaft) 82 Beater shaft (front rotor shaft) ) 89 Mowing input shaft 184 Refueling port 185 Threshing cover 186 Side plate 187 Top plate 188 Front plate 189 Bottom plate 190 Bottom plate (feeder house) 191 Front cover plate 192 Wall insert cover plate 193 Threshing side plate

Claims (4)

A traveling machine equipped with a threshing section equipped with a handling barrel, an engine, and a traveling machine body are provided, a harvesting section is provided in front of the threshing section, and a harvester that is transported from the harvesting section via a feeder house is a feeder. A combine to be charged into the threshing section provided on the terminal side of the house, wherein the hydraulic oil tank for storing the hydraulic oil is arranged on the traveling machine body and below the feeder house. A cooling fan that blows air toward the other side in the body width direction of the engine is provided on one side in the body width direction of the engine, and the hydraulic oil tank is arranged on the other side in the body width direction of the engine. The combine according to claim 1, wherein a part of each of the engine and the hydraulic oil tank is arranged side by side so as to overlap each other in the front-rear position of the airframe. The combine according to claim 1 or 2, wherein the wall inserter is arranged below the threshing machine, and the hydraulic oil tank is arranged in front of the wall inserter. A transmission shaft for transmitting the driving force from the engine to the input shaft of the conveyor of the feeder house is provided in front of the threshing portion, and the hydraulic oil tank is arranged below the transmission shaft. The combine according to any one of claims 1 to 3.

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