JP6979450B2 - combine - Google Patents

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 grains of the cut grain culms.

Conventionally, in a combine, in general, an ECU that controls the operation of the combine is often arranged around a control unit mounted on a traveling machine (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 10-295152 Japanese Unexamined Patent Publication No. 2014-14333

However, in the case of a combine in which the engine is mounted behind the control unit, the influence of the exhaust heat from the engine may affect the ECU. In recent years, it is desirable that the ECU, which often controls complicated control, has as little thermal influence as possible from the surroundings.

The technical subject of the present invention is to provide a combine that has been improved by examining the above-mentioned current situation.

In the present invention, a harvesting section is mounted on the front portion of a traveling machine equipped with an engine, a threshing section is mounted behind the cutting section of the traveling machine, and a control section is arranged on the front side of the threshing section. However, in the combine in which the engine is mounted on the lower rear side of the control unit, a shielding member for shielding the front-rear direction is provided on the front side of the support frame on the lower front side of the control unit, and the shielding member is provided on the front side of the shielding member. An ECU that controls the operation of the combine is attached , a battery for power supply is mounted below the control unit and behind the shielding member, and below the control unit, in front of the engine, in order from the front. The ECU, the shielding member, and the battery are located side by side in the front-rear direction .

In combine the present invention, the battery may be provided on a position lower than the lower end of the shielding member.

According to the present invention, a cutting section is mounted on the front portion of a traveling machine equipped with an engine, a grain removal section is mounted behind the cutting section of the traveling machine, and a control section is provided on the front side of the grain removal section. In the combine that is arranged and the engine is mounted on the lower rear side of the control unit, a shielding member that shields the front-rear direction is provided on the front side of the support frame on the lower front side of the control unit, and the front side of the shielding member. An ECU that controls the operation of the combine is attached to the engine, a battery for power supply is mounted below the control unit and behind the shielding member, and below the control unit, in front of the engine, from the front. Since the ECU, the shielding member, and the battery are arranged side by side in the front-rear direction in order, the ECU is arranged around the control unit as far as possible from the engine, and the engine is transferred to the ECU. The thermal effect can be reduced. The control of the ECU can be stabilized and the life can be extended.

It is a left side view of the combine which concerns on 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 the diagonally 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 top view which shows the structure around an engine room. It is a hydraulic circuit diagram which shows the structure of the work system hydraulic circuit. It is a front view which shows the arrangement composition of a hydraulic circuit component. It is the whole perspective view of the combine which shows the piping composition of the work system hydraulic circuit. It is an enlarged perspective view which shows the piping composition of a traveling system hydraulic circuit. It is a hydraulic circuit diagram which shows the structure of the traveling system hydraulic circuit. It is a perspective view which shows the plumbing workability of a hydraulic pipe on a mission case. It is a perspective view which shows the relationship between the hydraulic pipe on a mission case, and a connecting link body. It is a perspective view which looked at the front part of a traveling machine body diagonally to the left from the front. It is a perspective view which looked at the area around the driver's cab (control part) from the diagonally left rear view. It is a front view around the driver's cab (control part). It is a top view around the driver's cab (control part). It is a perspective view which looked at the area around the driver's cab (control part) from diagonally right rear. It is a perspective view which looked at the periphery of a driver's cab (control part) from the front. It is a perspective view which looked at the mounting position of the ECU from the diagonally left front of the traveling machine body. It is a front view around the driver's cab (control part) which shows the mounting position of an ECU. It is a top view around the driver's cab (control part) which shows the mounting position of an ECU. It is a perspective view which looked at the positional relationship between an ECU and a steering case from the diagonally right front. It is a perspective view which looked at the mounting position of the ECU from the diagonally right front.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings (FIGS. 1 to 26) applied to the conventional combine. 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 of the traveling machine 1 in the forward direction is simply referred to as the right side.

As shown in FIGS. 1 to 3, the ordinary combine 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. At the front of the traveling machine 1, a cutting section 3 for taking in uncut grain culms such as rice (or wheat, soybean, or corn) while cutting is mounted on a single-acting hydraulic cylinder 4 for raising and lowering. 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. At the lower part of the threshing section 9, a grain sorting mechanism 10 for rocking sorting and wind sorting is arranged. On the right side of the front part of the traveling machine 1, a driver's cab 5 as a control unit 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 a truck bed (or a container, etc.). The discharge conveyor 8 is arranged. The grain discharge conveyor 8 is tilted toward the outside of the machine so that 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 communicating with the handling port 9a at the front of the threshing section 9, and a horizontally long bucket-shaped grain header 12 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. The left and right cursive scripts 16 are projected on the left and right sides of the front part 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 of the feeder house 11 and the front end of the traveling machine 1 are connected via an elevating hydraulic cylinder 4, and the cutting unit 3 cuts with the cutting input shaft 89 (feeder house conveyor shaft) described later as an elevating 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 root side of the uncut grain culm is trimmed by the cutting blade 15, and the scraping auger 13 is used. 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 hydraulic cylinder for horizontal control (not shown) that rotates the grain header 12 around the axis of the horizontal control fulcrum is provided, and the lateral inclination of the grain header 12 is adjusted by the hydraulic cylinder for horizontal control to adjust the grain header. It is also possible to support the 12, 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. On the lower side of the handling cylinder 21, a receiving net 24 for leaking grains is installed. 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 body 21, and is placed between the handling body 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 feed 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 variety and properties of the harvested culm. On the other hand, as the grain sorting mechanism 10 arranged below the threshing section 9, a rocking 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 grains with branch stems), 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 wall insert 29 in the shape of a blower fan, 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 frying conveyor 32. Ru. The mixture of grains and straw (second product) is returned to the sorting start side of the rocking sorting machine 26 via the second conveyor mechanism 31 and the second reduction conveyor 33, and is re-sorted by the rocking sorting machine 26. Ru. Straw debris and the like are configured to be discharged to the field from the dust discharge port 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 machine 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 crawler belt 2, a tension roller 52 that maintains the tension of the crawler belt 2, and a plurality of track rollers 53 that hold the grounded side of the crawler belt 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 crawler belt 2, the tension roller 52 supports the rear side of the crawler belt 2, the track roller 53 supports the grounded side of the crawler belt 2, and the intermediate roller 54 supports the non-grounded side of the crawler belt 2. Configure 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 portion of the traveling machine body 1, and the mission case 63 is arranged on the front portion of the traveling machine 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. In addition, the working unit charge pump 59 and the cooling fan 149 for driving the lifting hydraulic cylinder 4 and the like are arranged in the engine 7, and the working unit charge pump 59 and the cooling fan 149 are driven by the engine 7.

Further, a swivel hydraulic continuously variable transmission 70 for steering 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-ahead hydraulic stepless transmission 64 and the turning hydraulic stepless transmission 70. Controlled, the left and right foot belts 2 are driven via the straight-ahead hydraulic continuously variable transmission 64 and the turning hydraulic continuously variable transmission 70, and are configured to travel in a field or the like. In the embodiment, the straight-ahead and turning hydraulic continuously variable transmissions 64 and 70 are arranged on the upper right side surface of the transmission case 63. The drive device of the present invention is composed of the straight-ahead and turning hydraulic continuously variable transmissions 64 and 70 and the transmission case 63.

Further, as shown in FIGS. 1 to 6, 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 the threshing portion 9 to the left and right. 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, 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 a 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 transferred to the beater 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 a 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 inserted 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 a 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, in the machine housing of the threshing machine 9, the cutting support frame 36 is installed on the upper surface side of the front part of the threshing machine housing column 34 on the upper surface side of the traveling machine 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 facing cutting input shaft 89 for driving the supply conveyor 17 in the feeder house 11 is provided. The cutting drive 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 rotation of the cutting forward / reverse switching case 121. It is transmitted to the shaft 122. The cutting input shaft 89 is driven via the normal rotation bevel gear 124 or the reverse rotation bevel gear 125 of the cutting forward / reverse switching case 121.

Further, a left-right facing 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 the engine 7 side end portion of the main counter shaft 76 is applied to the engine 7 side end portion 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 body 21 is pivotally supported by the handling body 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 close 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 controlled to be 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 frying 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 the straw debris of the second conveyor mechanism 31 is on the upper surface side of the rocking sorting board 26. Returned to. Further, in a structure in which a spreader (not shown) for scattering straw debris is provided in the dust discharge port 23, the left side of the main counter shaft 76 is provided to the spreader via a spreader drive pulley (not shown) and a spreader drive belt (not shown). 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. , 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 supporting the spline engaging shaft. The slider 127 is configured to be engageable and disengageable 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 to be removable and engageable.

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 (forward / reverse switching operation tool). By swinging, 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 rotation connection or the reverse rotation connection.

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 rotation 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. Further, 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 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, a hydraulic continuously variable transmission 64 for straight-ahead (main speed change) having a pair of straight-ahead pumps 64a and a straight-ahead motor 64b and a pair of swivel pumps 70a are provided in the transmission case 63. And a hydraulic continuously variable transmission 70 for turning having a turning motor 70b are provided. The transmission input shaft 66 of the mission case 63 is configured to be driven by gear-connecting the pump shafts 258 and 259 of the linear 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 straight 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 linear hydraulic continuously variable transmission 64, hydraulic oil is appropriately sent from the linear pump 64a to the linear 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.

The mission input shaft 66 projects from the upper left side surface of the mission case 63 toward the feeder house 11, and the mission input pulley 69 is axially attached to the protruding end (left end) of the mission input shaft 66 so as not to rotate relative to each other. The mission input shaft 66 is rotatably supported by bearings fixed to the mission case 63, and a power distribution gear 262 is fitted in the middle of the mission input shaft 66 so as not to rotate relative to each other. The pump shaft 258 of the straight pump 64a and the pump shaft 259 of the swivel pump 70a are respectively arranged in front of and behind the mission input shaft 66 in a plan view and below the mission input shaft 66 in a side view.

At the protruding end (left end) of the pump shaft 258 protruding from the continuously variable transmission case 323 toward the inside of the transmission case 63, a straight-ahead input gear 263 that meshes with a power distribution gear 262 fixed to the transmission input shaft 66 rotates relative to each other. It is fitted impossible. Similarly, at the protruding end (left end) of the pump shaft 259 protruding from the continuously variable transmission case 323 toward the inside of the transmission case 63, the turning input gear 264 meshes with the power distribution gear 262 fixed to the transmission input shaft 66. Is fitted so that it cannot rotate relative to each other.

When the driving force output from the output shaft 65 of the engine 7 is transmitted to the mission input pulley 69, the mission input shaft 66 and the power distribution gear 262 rotate together with the mission input pulley 69, and via the straight input gear 263, While rotating the pump shaft 258 of the linear pump 64a, the pump shaft 259 of the swivel pump 70a is rotated via the swivel input gear 264. That is, by engaging the power distribution gear 262 of the transmission input shaft 66 arranged between the pump shafts 258 and 259 with the linear input gear 263 and the turning input gear 264 of the pump shafts 258 and 259, respectively, from the engine 7. The driving force can be efficiently transmitted to each of the straight-ahead hydraulic continuously variable transmission 64 and the turning hydraulic continuously variable transmission 70.

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 is a straight-ahead motor by changing and adjusting the tilt angle of the rotary diagonal plate in the straight-ahead pump 64a according to the operation amount of the main shift lever 44 and the control handle 43 arranged in the control column 41. By changing the discharge direction and the discharge amount of the hydraulic oil to 64b, the rotation direction and the rotation speed of the linear motor shaft 260 protruding from the linear 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, which 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-moving 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 shift becomes zero) between the low speed, the medium speed, and the high speed of the auxiliary shift.

A drum-type parking brake 266 is provided on the parking brake shaft 265 (secondary shift output shaft) provided on the output side of the auxiliary shift gear mechanism 251. The rotational power from the auxiliary shift gear mechanism 251 is transmitted from the auxiliary shift 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-moving 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 rotation speed of the straight-ahead output (straight-ahead vehicle speed = shift output of the auxiliary shift output gear 267). is doing.

The left and right planetary gear mechanisms 268 can rotate 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 planetary gear 272, and a plurality of planetary gears 272 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 arranged concentrically with 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 external teeth on the outer peripheral surface of each 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 cuffs 2 are in the same direction. Drives at the same number of revolutions to move the traveling machine 1 straight (forward, backward).

The swivel hydraulic continuously variable transmission 70 changes and adjusts the tilt angle of the rotary swash plate in the swivel 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 rotary 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 for connecting the steering output shaft 285 to the right ring gear 273 are provided. The rotational power of the turning 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-ahead 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 linear 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 rotation) 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 shoe bands 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, of the drive sprockets 51 of the left and right crawler belts 2, one of them rotates forward and the other rotates backward, and the traveling machine body 1 is changed in direction (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 the speeds of the left and right crawler belts 2 is generated, and the traveling machine body 1 turns 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 ordinary combine of the present embodiment will be described with reference to FIGS. 8 to 15. As shown in FIGS. 8 to 12, the working system hydraulic circuit 180 includes, as hydraulic actuators, a hydraulic cylinder 4 for raising and lowering cutting, and hydraulic cylinders 27L and 27R for raising and lowering left and right reels that support the suction reel 14 so as to be able to move up and down. An auger lifting hydraulic cylinder 55 that supports the grain discharge auger 164 so as to be able to move up and down, left and right machine body lifting hydraulic cylinders 56L and 56R that raise and lower the traveling machine 1, a hydraulic oil tank 57 that stores hydraulic oil, and hydraulic oil. A working unit charge pump 59 connected to the tank 57 via a strainer 58, hydraulic valves 60A to 60E for switching the flow of hydraulic oil, and an oil cooler provided on the way back to the hydraulic oil tank 57 from the hydraulic valves 50A to 60E. 62 and. The hydraulic valves 60A to 60E are incorporated in the hydraulic valve unit 60 mounted on the traveling machine body 1.

The working unit charge 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 working unit charge pump 59 is hydraulically connected to the reel elevating hydraulic cylinders 27L and 27R via the reel elevating hydraulic valve 60B. By tilting the cutting posture lever (not shown) to the left or right, 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 working unit charge pump 59 is hydraulically connected to the auger elevating hydraulic cylinder 55 via the auger elevating hydraulic valve 60C. By tilting the grain discharge lever 155 in the operation 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 working unit charge pump 59 are hydraulically connected to the left machine body raising / lowering hydraulic cylinder 56L via the left machine body raising / lowering hydraulic valve 60D. On the other hand, the hydraulic oil tank 57 and the working unit charge pump 59 are hydraulically connected to the right machine body raising / lowering hydraulic cylinder 56R via the right machine body raising / lowering hydraulic valve 60E. The left and right hydraulic cylinders for raising and lowering the machine body 56L and 56R are operated independently of each other to raise and lower the left and right sides of the traveling machine body 1 independently.

Therefore, when the hydraulic cylinders 56L and 56R for raising and lowering the machine 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 machine 1 at the same time, the traveling machine 1 has the crawler belts 2 and 2 on both the left and right sides. The relative height (vehicle height) of the traveling machine 1 with respect to the crawler belts 2 and 2 touching 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 machine 1 approaches (descends) the track 2 and 2 ground contact portions on both the left and right sides, and the track 2 of the traveling machine 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 machine 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 machine 1 tilts downward to the right. On the contrary, the right hydraulic cylinder 56R for raising and lowering the right machine is operated to lower the right track frame 50 with respect to the traveling machine 1, or the hydraulic cylinder 56L for raising and lowering the left machine is operated to lower the right track frame 50 with respect to the traveling machine 1. When raised (or even if both of these operations are performed at the same time), the traveling machine 1 tilts downward to the left.

The hydraulic oil tank 57, the working unit charge 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 working unit charge pump 59 is fixed to the front surface of the engine 7 mounted on the front right side, and the strainer 58 built in the hydraulic oil tank 57 The working unit charge pump 59 is connected to the hydraulic pipe 181 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 working unit charge 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 which is a hydraulic oil return pipe and an oil cooler 62.

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 it is possible to suppress the accumulation of dust from the cutting section 3 in the hydraulic oil tank 57. Contamination of hydraulic oil due to intrusion of dust from the fuel filler port 184 or 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 hydraulic circuit 180, and each hydraulic member can be used. Can be driven properly.

The hydraulic oil tank 57 has a fuel filler port 184 projecting toward the left side (outside of the machine) on the left side (outside side of the machine), and has a trainer 58 that can be inserted and removed from the left side. Therefore, the refueling port 184 and the strainer 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 in the strainer 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 working unit charge pump 59. And the strainer 58 are connected. 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 extend rearward through the lower part of the cooling fan 149 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 pipe length 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. can.

As shown in FIGS. 7, 10 and 12 to 15, 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 oil. It is equipped with a cooler 153. The straight-ahead pump 64a and the straight-ahead motor 64b in the straight-ahead hydraulic continuously variable transmission 64 are connected in a closed loop by a straight-ahead closed oil 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 closed 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 the hydraulic oil to the straight-ahead motor 64b and the swivel motor 70b are discharged. 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 includes a straight-ahead valve 203 that is switched and operated in response to a manual operation of the main shift 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 straight valve 203 is switched and operated, the straight cylinder 204 operates to change the swash plate angle of the straight pump 64a, and the straight motor shaft 260 rotation speed of the straight motor 64b is steplessly changed or reversed. The action is performed. Further, the traveling system hydraulic circuit 200 also includes a hydraulic servo mechanism 205 for straight-ahead shifting. The hydraulic servo mechanism 205 executes a feedback operation in which the straight valve 203 returns to neutral by controlling the swash plate angle of the straight pump 64a, and changes the swash plate angle of the straight pump 64a in proportion to the manual operation amount of the main speed change lever 44. The number of revolutions of the linear motor shaft 260 of the linear motor 60b is changed.

The traveling hydraulic circuit 200 includes a swivel valve 206 that is switched and operated in response to a manual operation of the control 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 swash plate angle 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. Further, the traveling system hydraulic circuit 200 also includes a hydraulic servo mechanism 208 for turning and shifting. The hydraulic servo mechanism 208 performs a feedback operation in which the swash valve 206 returns to neutral by controlling the swash plate angle of the swash pump 70a, and changes the swash plate angle of the swash pump 70a in proportion to the manual operation amount of the control handle 43. The swivel motor shaft 261 rotation speed of the swivel motor 70b is changed.

As shown in FIG. 13, charge branch oil passages 219 (details will be described later) are connected to all the oil passages 201a, 201b, 202a, 202b of both closed oil passages 201, 202. A check valve 211 for the straight first oil passage 201a is provided between the charge branch oil passage 219 and the straight first oil passage 201a. A check valve 211 for the straight second oil passage 201b is provided between the charge branch oil passage 219 and the straight second oil passage 201b. Therefore, the straight oil closing passage 201 is provided with two check valves 211. Further, a check valve 212 for the turning first oil passage 202a is provided between the charge branch oil passage 219 and the turning first oil passage 202a. A check valve 212 for the turning second oil passage 202b is provided between the charge branch oil passage 219 and the turning second oil passage 202b. Therefore, the swivel closed passage 202 also includes two check valves 212.

A straight bypass oil passage 213 is connected to the straight first oil passage 201a and the straight second oil passage 201b. The straight-ahead bypass oil passage 213 is provided with a straight-ahead side bidirectional relief valve 215. A turning bypass oil passage 214 is connected to the turning first oil passage 202a and the turning second oil passage 202b. The swivel bypass oil passage 214 is provided with a swivel side bidirectional relief valve 216. Therefore, each of the closed oil passages 201 and 202 is provided with one bidirectional relief valve 215 and 216.

The suction side of the transmission charge pump 151 is connected to the strainer 217 in the transmission case 63 via the hydraulic pipe 221. A charge introduction oil passage 218 is connected to the discharge side of the transmission charge pump 151 via a hydraulic pipe 222, and an oil filter 152 is installed in the middle of the hydraulic pipe 222. 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 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 223, and the oil cooler 153 is installed in the middle of the hydraulic pipe 223. Therefore, the excess hydraulic oil from the transmission charge pump 151 is cooled by the oil cooler 153 when it is returned to the transmission case 63 via the excess relief valve 220.

Further, the hydraulic pipe 223 is connected by a bypass pipe 224 that bypasses the feed pipe 223a and the return pipes 223b to 223d, and the bypass pipe 224 is fixed above the continuously variable transmission case 323 on the side of the mission case 63. There is. By arranging the hydraulic pipe 223 and the bypass pipe 224 above the continuously variable transmission case 323, when the hydraulic oil temperature is low, such as when the engine 7 is started, the hydraulic oil can be circulated without being sent to the oil cooler 153. can. Therefore, even when the hydraulic oil temperature is low and the viscosity of the hydraulic oil is high, the hydraulic oil can be smoothly circulated in the traveling system hydraulic circuit 200, and the hydraulic oil can be smoothly circulated in the mission case 63 and the continuously variable transmission case 323. Lubricate each transmission mechanism of.

As described above, the oil cooler 153 is connected to the hydraulic pipes 221 to 223 that circulate the hydraulic oil in the transmission case 63 and the continuously variable transmission case 323 (drive device), and the bypass pipe (bypass) that bypasses the oil cooler 153. Road) 224 is provided in the hydraulic pipe 223, and the bypass pipe 224 is provided integrally with the mission case 63 and the continuously variable transmission case 323. Therefore, by connecting the transmission case 63 and the continuously variable transmission case 323 to the oil cooler 153, the piping path for circulating the mission case 63 and the continuously variable transmission case 323 becomes longer, but the length can be shortened by the bypass pipe 224.

By providing a bypass pipe 224 in the hydraulic pipe 223 to bypass the oil cooler 153, highly viscous hydraulic oil can be circulated when the engine is started in a cold region, and the inside of the mission case 63 and the continuously variable transmission case 323. Can maintain good lubricity. Further, by integrally providing the mission case 63 and the continuously variable transmission case 323 to the mission case 63 and the continuously variable transmission case 323, the bypass pipe 224 can be incorporated into the mission case 63, so that the assembling property is improved and the hydraulic device in the mission case 63 is improved. Maintenance is easy.

A connecting member (connecting joint) 225 provided with two communication ports 225a and 225b is provided in the stepless speed change case 323. One end of the bypass pipe 224 is connected to the communication port 225a of the connecting member 225, while the feed pipe 223a communicating with the oil cooler is connected to the communication port 225b of the connecting member 225. A bypass relief valve 226 (see FIG. 13) is provided at the connection portion between the connecting member 225 and the bypass pipe 224. The connecting member 225 is provided on the straight-ahead hydraulic continuously variable transmission 64 side (front side) of the upper surface of the continuously variable transmission case 323, and the communication port 225a is arranged below the communication port 225b. Further, the communication ports 225a and 225b of the connecting member 225 are projected rearward (toward the turning hydraulic continuously variable transmission 70 side), respectively.

Of the hydraulic pipes 223, the return pipes 223b to 223d of the oil cooler 153 are between the upstream side return pipe 223b to which one end is connected to the oil cooler 153 and the downstream side return pipe 223d to which one end is connected to the upper surface of the mission case 63. Is provided with a metal relay pipe 223c. The metal relay pipe 223c is fixed to the swivel hydraulic type continuously variable transmission 70 side (rear side) of the upper surface of the continuously variable transmission case 323.

The connecting plate (fixing member) 227 fixed to the side surface of the metal relay pipe 223c is fastened and fixed to the upper surface of the accommodating portion (rear end side of the continuously variable transmission case 323) of the swivel valve 206 in the continuously variable transmission case 323. As a result, the metal relay pipe 223c is fixedly arranged above the continuously variable transmission case 323 so as to be parallel to the pump shaft 259. Further, the metal relay pipe 223c has a T-shape having a communication port (branch pipe) 223e projecting forward (on the straight-ahead hydraulic continuously variable transmission 64 side) from the middle portion. That is, the communication port 223e in the middle of the metal relay pipe 223c is provided at the same height as the communication port 225a of the connecting member 225, and is projected toward the communication port 225a of the connecting member 225.

The bypass pipe 224 extends in the front-rear direction above the continuously variable transmission case 323 in order to connect the communication port 225a of the connecting member 225 arranged in the front-rear direction and the communication port 223e of the metal pillar police officer 223c. The bypass pipe 224 connects a metal pipe 224a having one end connected to the communication port 225a of the connecting member 225 and a hydraulic relay pipe (resin pipe) having one end connected to the communication port 223e of the metal relay pipe 223c. It is composed of. Further, the metal pipe 223a is provided with a bypass relief valve 226 that opens and closes the connection portion of the connecting member 225 with the communication port 225b.

The bypass path for bypassing the oil cooler 153 is composed of a metal relay pipe 223c, a bypass pipe 224, and a connecting member 225 that are integrally assembled with the continuously variable transmission case 323. Therefore, hydraulic parts other than the feed pipe 223a and the upstream return pipe 223b connected to the oil cooler 153 can be integrally assembled with the continuously variable transmission case 323, and the transmission case 63 to which the continuously variable transmission case 323 is assembled can be assembled. Ease and maintainability can be improved.

The hydraulic pipes 222 and 223 connected to the transmission case 63 and the continuously variable transmission case 323 are piped so as to go under the straight connecting link body 345 and the turning connecting link body 346 connected to the steering case 318. Therefore, not only the contact between the straight connection link body 345 and the swivel connection link body 346 and the hydraulic pipes 222 and 223 can be prevented, but also the maintenance of each of the straight line connection link body 345 and the swivel connection link body 346 becomes easy. Further, even when the hydraulic pipes 222 and 223 vibrate due to the influence of the drive of the mission case 63 and the like, it is possible to prevent damage due to contact with the straight connection link body 345 and the swivel connection link body 346.

More specifically, the hydraulic pipe 222 connecting the charge pump 151 and the oil filter 152 is piped in the front-rear direction so as to pass below the straight relay shaft 352 of the straight connection link body 345, and the oil filter 152. The hydraulic pipe 222 connecting the transmission case 63 and the transmission case 63 is piped in the front-rear direction so as to pass below the first relay rod of the swivel direct connection link body 346. Further, the downstream return pipe 223b connected to the transmission case 63 is bent so as to pass below the shaft support 366 in the swivel direct connection link body 346, and is connected to the metal relay pipe 223c fixed to the continuously variable transmission case 323. Has been done.

Next, the engine room 146 in which the engine 7 is installed will be described with reference to FIG. 8 and the like. As shown in FIG. 8 and the like, a pair of left and right engine room columns 147 are erected on the rear side of the cab 5 on the upper surface of the traveling machine body 1, and a back plate 148 is stretched between the left and right engine room columns 147 for operation. It covers the rear of the engine room 146 below the seat 42. Further, a box-shaped wind tunnel case 170 is erected on the right engine room support 147 provided at the right end of the driver's cab 5 in the traveling machine body 1 via the opening / closing fulcrum shaft 171. A dust net is installed in the outer opening of the machine on the right side of the wind tunnel case 170, 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. Further, in the wind tunnel case 170, the oil cooler 153 in the traveling system hydraulic circuit 200 and the oil cooler 62 in the working system hydraulic circuit 180 are arranged vertically.

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 of the machine 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 of the machine 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 driving operation structure of the steering wheel 43 and the like will be described with reference to FIGS. 8, 10, 16 to 21. As shown in FIGS. 8, 10, 16 to 21, a step frame 311 constituting a footrest flat portion for operator boarding in the driver's cab 5 is provided. A plurality of support leg frames 312 are erected on the upper surface side of the traveling machine body 1, and a step frame 311 is erected on the upper end side of the support leg frame 312. The step frame 311 and the support leg frame 312 form a support frame. The boarding / alighting step 313 is fixed to the side surface of the support leg frame 312 on the outer side of the right side of the step frame 311, and the oil filter 152 is attached to the front end of the step frame 311 on the upper surface of the traveling machine 1.

Further, a steering case 318 having a turning input shaft 316 and a main shift input shaft 317 is provided. Both ends of the case support horizontal frame 319 are connected between the left and right support leg frames 312 on the lower surface side of the step frame 311, and the steering case 318 is detachably fastened and fixed to the substantially horizontal case support horizontal frame 319. The turning input shaft 316 is projected upward from the upper surface of the steering case 318, and the turning input shaft 316 is connected to the steering handle 43 via the steering shaft 321. The main shift input shaft 317 is projected, and the main shift input shaft 317 is connected to the main shift lever 44 via the main shift operation rod 322.

As can be seen from the above explanation, the driver's cab 5 (control unit) on the step frame 311 provided on the upper end side of the support leg frame 312 group has a main shift lever 44, which is a straight-ahead operation tool for straight-ahead operation, and a turning operation. The steering handle 43, which is a turning operation tool of the above, is arranged. A case support horizontal frame 319 is bridged and attached between the left and right support leg frames 312 on the lower side of the front part of the step frame 311. A steering case 318 that interlocks and connects the main speed change lever 44, the steering handle 43, and the drive device (stepless speed change case 323 and the mission case 63) is attached to the case support horizontal frame 319. There are two case support horizontal frames 319 in the front and rear with the steering case 318 in between. The steering case 318 is supported by two front and rear case support horizontal frames 319.

Further, on the left side of the steering case 318 in the front portion of the traveling machine body 1, an oil filter 152 fixed to the step frame 311 at the front end position is arranged. The oil filter 152 is fixed to a portion protruding to the left from the left support leg frame 312 in the front portion of the step frame 311 so as to be arranged in front of the continuously variable transmission case 323. That is, the oil filter 152 is arranged in front of the continuously variable transmission case 323 fixed to the right side of the mission case 63 by being fixed to the left side of the front end portion of the step frame 311 via the filter fixing bracket 349. Therefore, when the hydraulic pipe 222 in which the oil filter 152 is provided in the middle of the pipe is connected to the transmission charge pump 151 and the charge introduction oil passage 218, the hydraulic pipe 222 can be configured to be short.

A case support horizontal frame 319 is laid across and attached between the left and right support leg frames 312 on the lower side of the front part of the step frame 311. Since the steering case 318 that is interlocked with the case 323 and the mission case 63) is attached, the rigidity of the front part of the traveling machine 1 (particularly near the driver's cab 5) can be improved by the presence of the case support horizontal frame 319. The steering case 318 can be supported with high rigidity by using the case support horizontal frame 319 that controls the role of reinforcing the front portion of the traveling machine body 1. Therefore, there is no significant discrepancy between the amount of operation of the main shift lever 44 and the steering handle 43 and the output of the drive device (continuously variable transmission case 323 and mission case 63), and the traveling state is not expected by the operator. You can eliminate the risk of becoming. The case support horizontal frame 319 for reinforcement can also be used as the mounting portion of the steering case 318, which contributes to cost reduction because a mounting base dedicated to the steering case 318 is not required.

It is provided with a continuously variable transmission case 323 in which a straight-ahead hydraulic continuously variable transmission 64 and a turning hydraulic continuously variable transmission 70 are assembled. The continuously variable transmission case 323 is fixed to the upper right side of the transmission case 63, and the operation arm bodies 355 and 369 for straight movement and turning are arranged on the front and rear surfaces of the continuously variable transmission case 323. That is, the straight-ahead hydraulic continuously variable transmission 64 and the swivel hydraulic continuously variable transmission 70 are arranged side by side on the right side surface of the transmission case 63 opposite to the feeder house 11.

Therefore, since a space is created on the side (left side) of the feeder house 11 in the mission case 63, the degree of freedom in designing the cutting section 3 is increased, and the feeder house 11 is used for the cutting amount of the cutting section 3 and the cutting width of the grain header 12. It can be configured in the optimum size. Further, since the installation width of the feeder house 11 in the left-right direction is widened, the feeder house 11 can be installed on the side close to the position of the center of gravity when raising and lowering the grain header 12, and the support strength of the feeder house 11 of the cutting section 3 can be increased. Can be enhanced.

The straight-moving operation shaft 325 as a straight-ahead output control unit is projected forward on the front-outer surface of the continuously variable transmission case 323, and the turning operation shaft 326 as a turning output control unit is directed backward on the rear-outer surface of the continuously variable transmission case 323. It is projected to. Although detailed illustration is omitted, the straight-ahead operation shaft 325 is connected to the straight-ahead operation arm body 355, and the swivel operation shaft 326 is connected to the swivel operation arm body 369. The straight-ahead connecting link body 345 and the turning connecting link body 346 provided on the rear side of the steering case 318 are connected to the straight-ahead and turning operation arm bodies 355 and 369, respectively, and the steering operation of the steering handle 43 and the main shift lever are connected. By the shift operation of 44, the operation of the straight-ahead hydraulic continuously variable transmission 64 and the turning hydraulic continuously variable transmission 70 is controlled, and the course and the moving speed of the left and right footbands 2 can be changed.

The driver's cab (control unit) 5 provided at the front of the traveling machine body 1 is provided with a main speed change lever (straight-moving operation tool) 44 for straight-ahead operation and a control handle (turning operation tool) 43 for turning operation, and a driver's cab. A steering column 41 is arranged on the side of the drive device (mission case 63 and continuously variable transmission case 323). Below the driver's cab 5 in the front part of the traveling machine body 1, the steering case 318 that changes the output from the transmission case 63 according to the operation amount of the control handle 43 and the main speed change lever 44 is a straight-ahead hydraulic continuously variable transmission. It is arranged on the side of the continuously variable transmission case 323 equipped with 64 and the continuously variable transmission 70.

In this case, the steering wheel 43 is arranged in the front center portion of the driver's cab 5 in front of the driver's seat 42, and the steering wheel 43 is steered on the left side portion closer to the drive device (continuously variable transmission case 323 and mission case 63). The main shift lever 44 is arranged in the column 41. That is, the steering case 313 is arranged below the steering wheel 43, and the continuously variable transmission case 323 is arranged below the steering column 41 in which the main shifting lever 44 is installed. As a result, each part of the operation system mechanism connected to the continuously variable transmission case 323 via the steering case 313 can be arranged close to each other from the steering handle 43 and the main speed change lever 44, and each part of the operation system mechanism is connected. Each link mechanism 321, 322, 345, 346 can be shortly configured to suppress fluctuations and deformations thereof. Therefore, the deviation between the operation amount of the main shift lever 44 and the steering wheel 43 and the output of the drive device (continuously variable transmission case 323 and the transmission case 63) is suppressed, and a stable running state according to the operator's operation is maintained. can.

The battery 230 that supplies electric power to the engine 7 is arranged below the driver's cab 5 in the front part of the traveling machine body 1, behind the steering case 318, and on the side of the continuously variable transmission case 32. That is, the battery 230 that supplies electric power to the engine 7 and the like is arranged in the area surrounded by the steering case 318, the drive device (continuously variable transmission case 323 and the mission case 63), and the engine 7 under the driver's cab 5. .. As a result, the dead space under the driver's cab 5 can be effectively used not only as a space for arranging the steering case 318 and the continuously variable transmission case 323, but also as a space for arranging the battery 230. Therefore, the battery 230 can be arranged close to the engine 7 and the cab 5, and the electric system can be made compact. In addition, it is possible to avoid increasing the size of the combine in order to secure the space for arranging the battery 230.

A driver's cab (control unit) 5 is configured on a plurality of support leg frames 312 erected on the upper surface side of the traveling machine body 1. Then, the steering case 318 is fixed to the case support horizontal frame (case support frame) 319 erected in the middle of the plurality of support leg frames 312, and is arranged above the continuously variable transmission case 323 and the battery 230. In this way, since the battery 230 and the steering case 318 are arranged vertically in multiple stages below the front portion of the step frame 311, the space formed in the region adjacent to the stepless speed change case 323 at the rear of the steering case 318 is used. Therefore, the electric wiring for supplying electric power to the electric members of each part such as the engine 7 and the driver's cab 5 can be easily extended. It also contributes to the improvement of assembly workability and maintenance workability of the steering case 318 and the battery 230.

Further, since the oil filter 152 for filtering the hydraulic oil in the drive device (stepless speed change case 323 and mission case 63) is arranged in the above region under the driver's cab 5, the drive device (stepless speed change case 323) is arranged. And the length of the hydraulic pipe 222 connecting the mission case 63) and the oil filter 152 can be shortened, and the handling of the hydraulic pipe 222 becomes easy.

At the upper part of the steering case 318, the lateral main shift input shaft 317 is arranged on one of the front and rear sides of the turning input shaft 316, and the lateral straight output shaft 350 is arranged on the other side. .. The main shift input shaft 317 and the straight output shaft 350 extend to the left and right in parallel with each other in a plan view, and are rotatably supported by the steering case 318. The main shift input shaft 317 and the straight output shaft 350 are pivotally supported so as to project outward (to the left) from the left side surface of the steering case 318. A swivel output shaft 164 extending in a direction orthogonal to the straight-ahead output shaft 350 is pivotally supported on the back surface of the steering case 318, below the straight-ahead output shaft 350, so as to project outward (rearward) from the steering case 318. ..

The straight-ahead connecting link body 345 is connected to the straight-ahead output shaft 350 by inserting a protruding end (left end) of the straight-ahead output shaft 350 into one end (right end) of the cylindrical shaft connecting body 351. At the other end (left end) of the shaft connecting body 351 is inserted a straight relay shaft 352 pivotally supported by a shift output support bracket 328 fixed to a support leg frame 312 at the left front position of the driver's cab 5. By adjusting the left-right position of the straight-moving relay shaft 352 with respect to the shaft connecting body 351, the installation position of the straight-moving connecting link body 435 in the left-right direction is adjusted.

One end (rear end) of the straight relay arm body 353 extending in the front-rear direction is fixed to the other end of the straight relay shaft 352, and the straight relay shaft 352 is rotated in response to the rotation of the straight relay shaft 352. The other end (front end) of the relay arm body 353 is swung up and down. The other end (front end) of the straight relay arm body 353 is connected to one end (upper end) of the straight connecting rod 354 extended up and down, and the other end (lower end) of the connecting rod 354 is for straight going. It is connected to the operation arm body 355 of.

The straight-ahead connection link body 345 connects a straight-ahead relay shaft 352 extending in the left-right direction at a position on an extension of the straight-ahead output shaft 350 by a shaft connection body 351 and a shift output fixed to a support leg frame 312. The support bracket 328 supports the shaft. As a result, the straight-ahead relay shaft 352 rotates together with the straight-ahead output shaft 350, and swings the front end of the straight-ahead relay arm body 353 fixed to the left end of the straight-ahead relay shaft 352. Then, the straight-ahead connecting rod 354 having both ends pivotally attached to the front end of the straight-ahead relay arm body 353 and one end of the straight-ahead operation arm body 355 moves up and down according to the swing of the straight-ahead relay arm body 353. As a result, the linear operation shaft 325 having the protruding end (front end) fixed to the other end of the operation arm body 355 is rotated.

On the other hand, the swivel connecting link body 346 is a first extending to the left and right to the other end (tip) of the output arm body 362 to which one end (base end) is fixed to the protruding end (rear end) of the swivel output shaft 361. One end (right end) of the relay rod 363 is connected. The first relay rod 363 is extended to the left and right at the rear position of the steering case 318 so as to straddle the front upper side of the continuously variable transmission case 323, and the other end (left end) of the first relay rod 363 is a relay for turning. It is connected to the first turning relay arm body 364 fixed to one end (front end) of the shaft 365. The swivel relay shaft 365 is supported by penetrating the tubular shaft support 366.

On the other hand, the second relay rod 368 extended to the left and right at the other end (tip) of the turning operation arm body 369 having one end (base end) fixed to the protruding end (rear end) of the turning operation shaft 326. One end (right end) is connected. The second relay rod 368 extends to the left and right along the back surface of the mission case 63 and the continuously variable transmission case 323, and the other end (left end) of the second relay rod 368 is one end (rear) of the turning relay shaft 365. It is connected to the second turning relay arm body 367 fixed to the end).

The shaft support 366 that pivotally supports the turning relay shaft 365 is on the mission case 63 by bolting the other end of the support plate 370, one end of which is fixed to the outer peripheral surface of the shaft support 366, to the upper surface of the mission case 63. Therefore, it is fixed to the left side position of the continuously variable transmission case 323. Further, on the outer peripheral surface of the shaft support 366, a pipe fixing portion 372 for fixing the position by passing a hydraulic pipe 223 connected to the mission case 63 is provided.

The swivel connecting link body 346 is a first relay rod extended in the left-right direction to an output arm body 362 whose tip swings left and right in accordance with the rotation of the swivel output shaft 361 projecting behind the steering case 318. 363 The right end is pivotally attached. Therefore, the first relay rod 363 moves in the left-right direction in accordance with the swing of the output arm body 362, and the tip of the first relay arm body 364 whose base end is fixed to the front end of the turning relay shaft 365 moves left and right. Swing. The swing of the tip of the first swivel relay arm body 364 causes the swivel relay shaft 365 pivotally supported by the shaft support 366 to rotate, and at the same time, the base end is fixed to the rear end of the swivel relay shaft 365. The tip of the second turning relay arm body 364 is swung left and right. Then, the second relay rod 368 having both ends pivotally attached to each of the front end of the second turning relay arm body 367 and one end of the turning operation arm body 369 is left and right according to the swing of the second turning relay arm body 367. By moving to, the swivel operation shaft 326 having the protruding end (rear end) fixed to the other end of the operation arm body 369 is rotated.

The main shift input shaft 317 protrudes from the steering case 318 toward the left and right center sides of the traveling machine body 1. The protruding end (left end) of the main shift input shaft 317 is pivotally supported by the main shift input support bracket 381 fixed to the step frame 311 on the left edge on the transmission case 63 side. Further, one end (front end) of the main shift arm body 382 is connected to the protruding end (left end) of the main shift input shaft 317, and the other end (rear end) of the main shift arm body 382 is the main shift lever 44. It is connected to the main speed change operation rod 322 connected to the above.

A straight-ahead hydraulic continuously variable transmission 64 and a turning hydraulic continuously variable transmission 70 that shift the power of the engine 7 are arranged side by side on the driver's cab (control unit) 5 side of the left and right sides of the transmission case 63. .. The straight-moving operation shaft 325 of the straight-moving hydraulic continuously variable transmission 64 and the turning operation shaft 326 of the turning hydraulic continuously variable transmission 70 are provided so as to be distributed in the front-rear direction. Since the straight-ahead hydraulic continuously variable transmission 64 and the turning hydraulic continuously variable transmission 70 are arranged side by side on the driver's cab 5, the connection structure with the steering case 318 can be shortened.

Further, by arranging the straight-ahead operation shaft 325 and the turning operation shaft 326 in the front-rear direction, the same positional relationship as the straight-ahead output shaft 350 and the turning output shaft 361 arranged in the front-rear direction in the steering case 318 can be obtained. As a result, the structure of the link mechanism from the steering case 318 to the straight-ahead hydraulic continuously variable transmission 64 and the turning hydraulic continuously variable transmission 70 can be simplified, and the continuously variable transmission case 323 and the steering case 318 are located below the driver's cab 5. Can be installed compactly by bringing them close to each other.

The steering case 318 is located below the driver's cab (control unit) 5 and above the drive device (continuously variable transmission case 323 and mission case 63), and the straight-ahead output shaft 350 and the turning output shaft 361 project from the steering case 318. It is set up. The straight-ahead connecting link body 345 that connects the straight-ahead output shaft 350 and the straight-ahead operation shaft 325, and the turning-connecting link body 346 that connects the turning output shaft 361 and the turning operation shaft 326, respectively, have no steering case 318 and no steering case 318 in a plan view. It is installed between the speed change cases 323. That is, since the straight connecting link body 345 and the turning connecting link body 346 are arranged together with the mission case 63 on the driver's cab 5, the assembling property and the maintainability are improved.

A straight-ahead connection link body 345 that interlocks and connects the steering case 318 and the straight-ahead operation shaft 325, which is a straight-ahead output control unit, is supported by a support leg frame 312 that supports the driver's cab 5. The steering case 318 is fixed to a case support horizontal frame (case support frame) 319 erected in the middle of the left and right support leg frames 312 that support the driver's cab (control unit) 5 front position. Then, the straight-ahead connecting link body 345 is supported by the left support leg frame 312 on the mission case 63 (continuously variable transmission case 323) side.

A support frame 312 that supports the driver's cab 5 with a linear connection link body 345 that interlocks and connects the steering case 318 and the linear operation shaft 325 (straight output control unit) provided in the drive device (continuously variable transmission case 323 and mission case 63). Is supported by. Therefore, even if the linearly connected link body 345 is bent or pulled by the vibration of the drive device (continuously variable transmission case 323 and the mission case 63), the support leg frame 312 that supports the driver's cab 5 makes the linearly connected link body 345 highly rigid. It is possible to suppress fluctuations and deformations of the linearly connected link body 345. Therefore, there is no significant deviation between the operation amount of the main shift lever 44 and the steering wheel 43 and the output of the drive device (continuously variable transmission case 323 and mission case 63), and the running state is not expected by the operator. You can eliminate the risk of becoming.

A continuously variable transmission case 323 containing a straight-ahead hydraulic continuously variable transmission 64 and a turning hydraulic continuously variable transmission 70 is fixed at an upper position on the right side surface of the transmission case 63. Then, the swivel connection link body 346 is supported on the upper surface of the transmission case 63 and on the continuously variable transmission case 323 side. By utilizing the space between the feeder house 11 and the driver's cab 5, the swivel connection link body 346 can be compactly and highly rigidly supported on the transmission case 63 having the same vibration system as the continuously variable transmission case 323. Therefore, the bending and tension of the swivel connecting link body 346 due to mechanical vibration are suppressed, and the operation amount of the main shift lever 44 and the control handle 43 and the output of the drive device (stepless speed change case 323 and mission case 63) are combined. There is no significant deviation between them, and there is no risk of driving conditions that the operator does not expect.

The mounting structure of the ECU 401 that controls the operation of the combine will be described with reference to FIGS. 22 to 26. As can be seen from the above description, in the embodiment, since the step portion 400, which is a space surrounded by the front portion of the traveling machine 2, the support leg frame 312 group, and the step frame 311 group, is a dead space, the space is used. A steering case 318, a continuously variable transmission case 323, and a battery 230 are arranged.

An ECU 401 that controls the operation of the combine is arranged on the front side of the step portion 400. In the embodiment, the shielding plate 402 is arranged so as to be bridged between the front side of the step portion 400, that is, the center side of the front portion of the step frame 311 and the center side of the front portion of the case support horizontal frame 319. The upper end side of the shielding plate 402 is welded and fixed to the center side of the front portion of the step frame 311. The lower end side of the shielding plate 402 is welded and fixed to the center side of the front portion of the case support horizontal frame 319. That is, the shielding plate 402 is supported by the step portion 400 (step frame 311 and case support horizontal frame 319). The ECU 401 is fastened to the front side of the shielding plate 402.

Therefore, the ECU 401 is located on the front side and the engine 7 is located on the rear side across the space of the step portion 400. Moreover, the steering case 318 and the shielding plate 402 are located between the ECU 401 and the engine 7, and both the steering case 318 and the shielding plate 402 serve as a shield against the exhaust heat from the engine 7. With this configuration, the ECU 401 is arranged around the driver's cab 5 (control unit) as far as possible from the engine 7, and the thermal influence from the engine 7 to the ECU 401 can be reduced. It is possible to stabilize the control of the ECU 401 and extend its life. In particular, since the waste heat from the engine can be blocked by the shielding plate 402, the effect of reducing the thermal influence from the engine 7 to the ECU 401 is high.

The outer shape of the shielding plate 402 is larger than the outer shape of the ECU 401. Therefore, the peripheral portion of the shielding plate 402 protrudes from the outer peripheral portion of the ECU 401. Due to the presence of the peripheral portion of the shielding plate 402, it is difficult for the exhaust heat from the engine 7 to go around to the front side of the ECU 401. The shielding plate 402 of the embodiment has a notch on the lower center side, and has a downward substantially U-shaped shape. The cutout portion 403 is provided for the purpose of lightening the shielding plate 402 and for the purpose of exposing the back side of the ECU 401 to outside air or releasing the heat of the ECU 401.

The front side of the ECU 401 is covered with the front cover 404 of the driver's cab 5. The power supply battery 230 arranged in the step portion 400 is placed below the steering case 318 and the case support horizontal frame 319. Therefore, the ECU 401 is placed higher than the battery 230. The battery 230 is placed in a position on the traveling machine body 1 that is not affected by, for example, muddy water or rainwater in the field (is not exposed to muddy water or the like). Since the ECU 401 is also arranged at a high position in such a battery 230, there is an advantage that the influence of muddy water or the like on the ECU 401 can be more reliably eliminated. Further, since the ECU 401 and the battery 230 are arranged close to each other, the electric system can be made compact.

The configuration of each part in the present invention is not limited to the illustrated embodiment, and various changes can be made without departing from the spirit of the present invention.

1 Traveling machine 3 Cutting part 5 Driver's cab 7 Engine 9 Threshing part 11 Feeder house 311 Step frame (support frame)
312 Support frame (support frame)
318 Steering case 319 Case support Horizontal frame 400 Step section 401 ECU
402 Shielding plate 403 Notch 404 Front cover

Claims (2)

The harvesting section is mounted on the front part of the traveling machine equipped with the engine, the threshing section is mounted behind the cutting section of the traveling machine, and the control section is arranged on the front side of the threshing section. In the combine where the engine is mounted on the lower rear side of the part,
In front of the supporting frame of the lower front side of the steering unit is provided with a shield member for shielding the front-rear direction, the front ECU responsible for operational control of combine is attached to the shield member, wherein the steering of the lower and the shield A battery for power supply is mounted on the rear side of the member,
Below the control unit, the ECU, the shielding member, and the battery are arranged side by side in the front-rear direction in order from the front in front of the engine.
combine. The battery is provided at a position lower than the lower end of the shielding member.
The combine according to claim 1.

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