JP6888988B2 - combine - Google Patents

Description

The present invention relates to a self-removing type or general-purpose type combine, and more particularly to a combine in which a control portion is provided in front of a driving portion composed of a diesel engine, a radiator, or the like.

The combine, which is a work vehicle for agriculture, mounts a diesel engine on the fuselage frame so that its crankshaft faces left and right, and uses it as a power source to drive various parts of the fuselage such as a traveling device, a cutting section, and a threshing section. In addition, this engine has a radiator installed in front of the cooling fan, and the radiator cools the cooling water of the engine. Further, an air cleaner is provided above the engine, and the air cleaner supplies clean air to the engine.

On the other hand, the diesel engine is a common rail system (common rail fuel injection system: Common) that reduces the generation of particulate matter such as nitrogen oxides generated by complete combustion and soot generated by incomplete combustion due to the tightening of exhaust gas regulations. Rail Injection System), supercharger (Turbo Charger), and exhaust gas recirculation system (EGR: Exhaust Gas Recirculation) will be adopted.

In addition, the diesel engine removes nitrogen oxides and particulate matter that could not be completely purified by the engine body, such as diesel oxidation catalyst (DOC), diesel particulate filter (DPF), and urea selective catalytic reduction (SCR). Remove using the exhaust gas purification device of.

Therefore, it is necessary to install an exhaust gas purification device in addition to the driving part composed of the conventional engine, radiator, etc., and the combine is on the airframe frame under the restriction of ensuring the performance of this purification device. It is a design issue to find these placement spaces, avoid the accompanying increase in size of the aircraft as much as possible, and organize the aircraft compactly.

Therefore, a diesel engine and a radiator are installed side by side on the fuselage frame, an air cleaner and a first exhaust gas purification device are provided above the engine and the radiator, and a second exhaust gas purification device is installed under the front part of the grain tank. It is known to be provided in the recessed portion on the one side (see Patent Document 1). Similarly, it is known that the first and second exhaust gas purification devices are provided in the recesses facing the engine room of the grain tank (see Patent Document 2).

Japanese Unexamined Patent Publication No. 2016-168975 Japanese Unexamined Patent Publication No. 2016-158591

As mentioned above, the combine is equipped with an exhaust gas purification device in addition to the driving part composed of an engine, a radiator, etc. to comply with exhaust gas regulations. However, as described in Patent Document 1 and Patent Document 2, if the grain tank is provided with a recess for arranging the exhaust gas purification device, the amount of grain stored in the grain tank is reduced, which is not preferable.

Further, as described in Patent Document 1, if the first exhaust gas purification device is installed at a location on the inner side of the upper part of the engine in the width direction of the machine body and provided on the lower side of the side panel of the control unit, the temperature becomes high. The first exhaust gas purifying device raises the atmospheric temperature of the control unit, which is not preferable for the operator. Further, if a cover covering the first exhaust gas purifying device is provided below or on the side of the side panel, there is a risk that the cost of those members will increase.

On the other hand, in front of the driving unit provided with such an exhaust gas purification device, a control unit provided with a driver's seat, an operation panel, and the like is provided. The control unit is provided with a cover that separates the driving unit from the rear end of the floor to the rear of the driver's seat, and this cover blocks noise, hot air, or dust that tries to enter the control unit from the driving unit, and also has a high temperature. Prevent the operator from coming into contact with the engine or the like.

Specifically, as described in Patent Document 1, the cover is connected to the front plate portion located on the front side of the engine, the top plate portion located on the upper side of the engine, and the rear of the top plate portion. It is composed of an air supply chamber component formed behind the driver's seat, a cover covering the first exhaust gas purification device below the side panel, and the like. Therefore, since these partition covers are incorporated into the control unit with a large number of plates and a frame material for mounting and supporting the plates, there is a risk of deteriorating the manufacturing cost of the control unit.

Further, these partition covers are formed in a stepped shape along the outer shape of the engine, the air cleaner, or the like, or in Patent Document 1, an independent air cleaner air supply chamber is provided above the engine. There is a risk that the accommodation space (engine room) of the engine will be narrowed as a whole and the heat balance of the engine will be deteriorated.

In addition, as described in Patent Document 1 and Patent Document 2, in the case where the control unit is composed of a cabin and the cabin is rotated outward or forward, the engine or the like is exposed to perform these maintenance. It is excellent in that it can be done. However, in order to rotate the cabin, it is necessary to increase the frame rigidity, add a lock device with the fuselage frame, or design to release the connection with the peripheral device, and for that reason, at the time of maintenance It takes a lot of time to rotate the cabin, which makes it difficult to handle in practice.

Further, in the conventional combine, one of the partition covers provided between the driving part and the control part is removed so that the engine can be maintained. However, with this product, the opening that was removed was narrow, or it was blocked by the mounting frame of the cover, making maintenance difficult. Therefore, it is desired that the partition cover can be widely removed without rotating the control unit or the cabin so that maintenance of the engine or the like can be easily performed.

Therefore, in view of the above problems, the present invention can secure a sufficient space for arranging the air cleaner and the exhaust gas purification device above the engine and the radiator, and also partitions the control unit provided in front of the engine and the radiator. It is an object of the present invention to provide a combine that can make the cover simple so that the accommodation space of the driving part can be widened and the environment of the control part can be made comfortable.

In order to solve the above problems, the present invention first provides a diesel engine and a radiator in the left-right direction on the fuselage frame, provides an air cleaner and an exhaust gas purification device above the engine and the radiator, and in front of them. in combine to provide a cabin which constitutes the steering unit comprising a driver's seat and the control panel, the engine, radiator, air cleaner, and the body front side of the exhaust purification device, and a lower cover which rises substantially vertically from the floor rear steering unit The cabin is configured to be covered by a rear cover that inclines backward from the upper end of the lower cover, and the cabin is provided with a cabin frame and an entrance / exit that form a skeleton, and is intermediate between the cabin frame that serves as a door frame for the entrance / exit. The stanchions are provided with a lower side that rises substantially vertically from the rear end of the floor and a middle side that slopes upward from the lower side, and one side of the lower cover is the lower side of the intermediate stanchion and one side of the rear cover is the intermediate stanchion. It is characterized in that it is configured to be mounted on the middle side via a mounting frame.

Secondly, in the present invention, the air cleaner and the exhaust gas purifying device have their longitudinal directions in the left-right direction which is the same direction as the crankshaft of the engine, and one air cleaner is located substantially directly above the engine and the radiator. The other exhaust gas purification device is provided near the rear of the air cleaner.

Thirdly, the present invention is characterized in that a recess facing above the engine is formed in the rear cover of the control portion, and the recess is accommodated near the lower part of the backrest of the driver's seat.

Fourth , the present invention is characterized in that the rear cover of the control portion is detachably formed.

According to the combine of the present invention, an air cleaner and an exhaust gas purification device are provided above the engine and the radiator, and the front side of these is a lower cover that rises substantially vertically from the rear end of the floor of the control unit, and a lower cover that rises from the upper end to the rear of the lower cover. Since it is covered by the rear cover that inclines upward, the cover that separates the driving part and the control part can be configured as a simple one with the lower cover and the rear cover, and the material cost of the cover and the processing and assembly cost can be reduced. be able to.

Further, if the cover that separates the driving part and the control part is formed in a stepped shape as in the conventional case, the accommodation space of the driving part is narrowed instead of creating a space that is not required for the control part. However, if the rear cover is tilted upward, an unnecessary space for the control portion can be allocated to the driving portion to widen the accommodation space of the driving portion, whereby the heat balance of the engine can be made appropriate.

Further, the lower cover that rises substantially vertically and the rear cover that tilts backward can be formed of a flat plate without bending, and when these covers are attached to the control part, the periphery is closely attached to the cover attachment frame. Since it can be installed without a gap, sound insulation and dust resistance from the driving part can be ensured. In addition, the straw debris that falls on the rear cover slides down toward the floor due to the rising inclined surface, so that the control portion can be kept clean.

In addition, the air cleaner and the exhaust gas purification device have their longitudinal directions in the left-right direction which is the same direction as the crankshaft of the engine, and one air cleaner is substantially directly above the engine and the radiator, and the other exhaust gas purification device. If installed near the rear of the air cleaner, the exhaust gas purification device can be placed without invading the placement space such as the grain tank, and the exhaust gas of the engine can be introduced into the exhaust gas purification device with less temperature drop. The purifying effect can be fully exerted.

If the air cleaner is provided substantially directly above the engine and the radiator, the connecting pipe between the air cleaner and the engine can be made shorter than that provided near the rear of the engine, and the intake resistance during this period can be reduced. Further, in this case, if the air flow sensor provided for DPF regeneration is integrally provided with the air cleaner, there is no restriction on the length of the connecting pipe unlike the case where the air flow sensor is provided in the middle of the connecting pipe, and the engine and the radiator are substantially true. An air cleaner can be provided on top by shortening the connecting pipe.

Then, if the air cleaner is provided substantially above the engine and the radiator and the exhaust gas purification device is provided near the rear of the air cleaner in this way, even if both are provided on the same engine, the exhaust gas purification device that becomes hot is operated. It can be arranged as far as possible from the part, which reduces the thermal effect on the control part of the exhaust gas purification device and makes the control part comfortable.

Furthermore, if a recess facing above the engine is formed in the rear cover of the control unit and the recess is accommodated near the lower part of the backrest of the driver's seat, the recess will slightly narrow the accommodation space of the driving part, but the driver's seat Can be placed in almost the same position as before, so the driver's seat can be moved forward to increase the size of the control unit, and the control unit can be compactly organized as a whole without affecting the driving operation. it can.

Moreover, if one side of the mounting frame of the lower cover and the rear cover is provided by using the intermediate support of the cabin frame that serves as the door receiving frame of the entrance / exit of the cabin, it is not necessary to separately provide a frame for providing the cover mounting frame. One side of the lower cover can be attached to the vertical part (lower side) near the lower part of the intermediate support, and one side of the rear cover can be attached to the inclined part (middle side) closer to the middle via the mounting frame. It is possible to reduce the material cost of the part and the processing and assembly cost.

Moreover, if the rear cover of the control unit is detachably attached, the engine and the exhaust gas purification device can be accessed from the wide opening from which the rear cover is removed, and these maintenance can be easily performed from the opening. In addition, since the rear cover can be attached and detached in a much shorter time than when the control unit (cabin) is rotated for maintenance, inspection and the like can be performed quickly.

It is a right side view of the combine. It is a left side view of the combine. It is a top view of the combine. It is the right side view of the prime mover part. It is a left side view of the driving part. It is a rear view of a driving part. It is a perspective view which shows the skeleton of a cabin. It is a perspective view which shows the skeleton on the back side of a cabin without the support | support on the front side. It is a perspective view which shows the skeleton on the back side of a cabin by removing a driver's seat. It is a perspective view which shows the skeleton on the back side of a cabin by removing a rear cover. It is a perspective view seen from the front side of a rear cover. It is a perspective view seen from the back side of a rear cover. It is a side view of a driver's seat. It is a front view of a driver's seat.

Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the combine 1 that threshes rice and wheat while cutting is provided with a traveling device 3 at the lower part of a rectangular body frame 2, and the traveling device 3 has crawlers 5 on the left and right traveling frames 4. Is wound to form a crawler-type traveling device that is driven by a transmission 6. Further, a control unit A composed of a cabin 7 is provided on the front right side of the airframe frame 2 when viewed from the forward direction of the airframe. Further, the cutting portion B is provided by the hydraulic cylinder 8 so as to be able to move up and down from the left front portion of the machine frame 2 to the front portion of the control portion A.

Further, a threshing section C is provided on the left side of the machine frame 2 behind the cutting section B, and a grain collecting section D composed of a grain tank 9 and grains stored in the grain collecting section D are provided on the right side of the threshing section C. Is provided with a discharge auger 10 for discharging the auger to the outside of the machine. Then, a straw waste processing device E composed of a cutter 11 is provided behind the threshing section C and the grain collecting section D. Further, between the control unit A and the grain collection unit D, a prime mover composed of a traveling device 3, a cutting unit B, a threshing unit C, a grain collection unit D, a diesel engine for driving a straw disposal device E, and the like. Part F is provided.

Then, the cutting section B divides the standing hair culms in the field into cut grain culms and uncut grain culms by a weed plate 12 and a narrow guide 13 provided at the lower part of the front end thereof, and between the left and right weed plates 12. The harvested culm that has entered is raised by the claws of the raising device 14, and then the root of the culm is cut by the cutting blade 16 while being scraped by the scraping device 15. Further, the grain culms that have been scraped backward by the scraping device 15 are merged by the left and right and center scraping transport chains and the tip transport chains that constitute the lifting transport device 17, and the merged grain culms are handled deeply. The culm is transported to the threshing section C while adjusting the handling depth by the transport chain 18.

Further, the threshing section C forms a handling chamber at the upper part of a machine frame composed of front and rear walls, left and right side walls, a bottom plate, a cylinder cover 19 and the like covering the upper part, and is conveyed to this handling chamber from the cutting section B. A threshing field chain 20 and a cylinder cover 19 are provided with a pinching rail 21 for pinching and transporting the culm along the handle, a first handle having a large number of teeth planted around the handle, and a receiving net. In addition, a processing chamber for processing straw waste mixed with grains that could not be threshed in the handling chamber is provided in parallel from the rear end tip side of the first handling cylinder toward the rear of the machine body, and this processing chamber is provided. Is provided with a second handling cylinder and a receiving net. Further, below the first and second handling cylinders, a sorting chamber including a swing sorter for sorting grains and the like leaked from the receiving net, a sorting air passage, and the like is provided.

Then, the grains that have been threshed and sorted by the threshing section C are transferred to a grain tank 9 that constitutes the grain collecting section D, and the grain tank 9 temporarily stores the grains, and then the discharge auger 10 is used. Is released to a container outside the machine. The grain tank 9 is configured to be rotatable around the vertical spiral cylinder 10a on the base side of the discharge auger 10 with the front side facing the outside of the machine body. Further, the discharge auger 10 makes the vertical spiral cylinder 10a on the base side swivelable by a hydraulic motor, and makes the vertical spiral cylinder 10b on the tip side swingable up and down by the hydraulic cylinder 22 so that the machine body can be swung from the machine body storage posture. It can be changed to the rear discharge posture.

The dust such as straw dust and dust generated in the threshing unit C is sucked by a dust exhaust fan provided in the sorting chamber and discharged to the rear of the threshing unit C from the dust exhaust port. Further, the culm discharged from the handling room after completing the threshing process is conveyed to the straw discharge processing device E by the straw discharging transport device, and further, the disc type cutter 11 constituting the straw waste processing device E is used. The culm transported by the straw transfer device is shredded and released as cut straw to the harvested site.

Next, the driving unit F for driving each part of the airframe will be described. As shown in FIGS. 4 to 6, the driving unit F includes a vertical water-cooled 4-stroke diesel engine 23. The engine 23 has its crankshafts 23a on the left and right sides of the body so that the output pulley 24 for driving each part of the combine 1 is on the center side of the body frame 2 and the cooling fan 25 is on the right side of the body frame 2. It is mounted on the airframe frame 2 via the anti-vibration rubber 26 in the direction.

Further, in order to comply with the exhaust gas regulation, this diesel engine 23 stores the fuel pressurized by the supply pump in the rail (accumulation chamber) 23b, and is appropriate for each cylinder from the injector in a timely manner under ECU control. A common rail system that injects a large amount of fuel is adopted, which makes the fuel finer by high fuel injection pressure, reduces the unburned residue of the fuel, and suppresses the generation of particulate matter.

In addition, a turbocharger that forcibly sends high-density air and an air-cooled intercooler will be installed to increase engine output, improve fuel efficiency, and reduce carbon dioxide and particulate matter emissions. In addition, an EGR system is adopted in which a part of the exhaust gas is recirculated to the engine 23 by an EGR (Exhaust Gas Recirculation) valve, a throttle valve, a water-cooled EGR cooler that lowers the temperature of the exhaust gas that becomes hot, etc. By lowering the combustion temperature of the exhaust gas, the generation of nitrogen oxides is suppressed.

With the further tightening of exhaust gas regulations, a DPF system that captures particulate matter contained in the exhaust gas with a filter, regenerates the DPF and burns it, and sprays urea water to obtain ammonia through a hydrolysis reaction. Therefore, an exhaust gas purification device (post-treatment device) that uses a urea SCR system that reacts the reducing agent ammonia with nitrogen oxides to reduce it to nitrogen and water is adopted.

Further, the DPF system and the urea SCR system include a DPF case 27 containing a diesel oxidation catalyst (DOC) and a diesel particulate filter (DPF), and a diesel oxidation catalyst (DOC) and a urea selective catalytic reduction (SCR). It includes an SCR case 28, a urea water tank, and the like. Of these, the DPF case 27 and the SCR case 28 are attached to the gate columnar auxiliary accessory mounting frame 29 provided near the rear of the engine 23 via brackets, and each is provided above the engine 23. Further, the urea water tank is provided, for example, in an empty space of the airframe frame 2 behind the Glen tank 9.

On the other hand, in front of the cooling fan 25 of the engine 23, a radiator 30 for air-cooling the cooling water of the engine 23 is provided. The radiator 30 is attached to the radiator bracket 31 standing upright from the machine frame 2 via grommets at the top, bottom, left and right. Further, a fan shroud is provided on the back surface of the radiator 30, and the air sucked by the cooling fan 25 cools the cooling water of the engine 23 while passing between the fins of the radiator 30, and further cools the cooling water of the engine 23 and the like. Cool by exhaust air.

Further, heat exchangers such as an oil cooler 32 and an intercooler 33 are provided on the front side of the radiator 30, and these heat exchangers also cool each medium by the air sucked by the cooling fan 25 like the radiator 30. Can be done. The cooling fan 25 of the engine 23 is provided with a forward / reverse mechanism for driving by switching the rotation in the forward / reverse direction by a forward rotation pulley and a reverse rotation pulley which are switched by an electric motor (not shown).

Further, a dustproof net is provided on the front surface of the radiator 30 and the heat exchangers 32 and 33, and a side cover 35 whose ventilation port is closed with a perforated plate 34 is provided (see FIG. 1). The rear part of the side cover 35 is rotatably pivotally supported by a cover mounting frame (not shown) erected from the machine frame 2, and always covers the right side surface of the driving part F, and the dustproof net is cleaned. If you do, you can open it outwards to perform these maintenances.

Further, an air cleaner 36 is provided substantially directly above the radiator 30 and the engine 23 by attaching the air cleaner 36 to the auxiliary equipment mounting frame 29 so that the longitudinal direction thereof is the left-right direction. The air cleaner 36 takes in the air pre-purified by the pre-cleaner 37 provided on the upper side of the intake air, filters the dust by the element housed in the cylindrical case, and supplies the clean air to the engine 23. Further, the air cleaner 36 is integrally provided with an air flow sensor provided for DPF regeneration or the like.

Next, the cabin 7 constituting the control unit including the driver's seat, the operation panel, and the like will be described. As shown in FIGS. 1 to 3, 6 and 7, the cabin 7 is fitted into the cabin frame 38 forming the skeleton, the roof 39 provided on the upper part of the cabin frame 38, and the front opening of the cabin frame 38. The windshield 40 to be inserted, the left side panel 41 forming the left side surface of the cabin 7, the left side glass 42 provided to be openable and closable in the opening of the left side panel 41, the back panel 43 forming the back surface of the cabin 7, and the back surface. It includes a rear glass 44 that can be opened and closed in the opening of the panel 43, a right side glass 45 that fits into the right side of the cabin frame 38 near the rear, and a door 46 that is provided at the entrance / exit formed on the right side of the cabin frame 38 near the front. ..

As shown in FIG. 7, the cabin frame 38 includes a ceiling frame 38a that is framed in a rectangular shape, a right front support column 38b and a right intermediate support column 38c that serve as door frames for entrances and exits, and a left front portion provided on the left front portion of the cabin 7. The support column 38d, the left rear support column 38e provided at the left rear portion of the cabin 7, the right rear support column 38f provided at the right rear portion of the cabin 7, and the vertical intermediate portion between the right front support column 38b and the left front support column 38d of the door frame are connected. The front connecting frame 38g formed in a U shape, the rear connecting frame 38h connecting the lower part of the right rear support column 38f and the left rear support column 38e, and the right connecting frame 38i connecting the lower part of the right rear support column 38f and the right intermediate support column 38c. Etc.

Further, the cabin frame 38 is provided with a rectangular floor frame 38j below the right front support column 38b and the right intermediate support column 38c, and a long square is provided between the left front support column 38d and the left rear support column 38e and the floor frame 38j. The left operation frame 38k is provided by using a pipe or the like. Further, a cover mounting frame 38l is provided from the rear portion of the floor frame 38j to the rear connecting frame 38h using a plate, an angle material, or the like. Then, the floor frame 38j of the cabin frame 38 is attached to the operation frame 47 provided on the right front portion of the airframe frame 2, and the rear portion of the cabin frame 38 is attached and supported by the auxiliary equipment mounting frame 29 erected from the airframe frame 2. Then, the cabin 7 is mounted on the fuselage frame 2.

The right front support column 38 of the entrance / exit is erected substantially vertically from the front end of the floor frame 38j, while the right intermediate support column 38c is erected substantially vertically from the rear part of the floor frame 38j and from the lower side a. It has a middle side b that inclines upward by about 60 degrees and an upper side c that rises substantially vertically from the middle side b. Therefore, the entrance / exit is wider on the upper side than on the lower side. Further, a door 46 formed by attaching a transparent plate such as glass to a pipe frame is provided at the entrance / exit.

Then, the door 46 provided at the entrance / exit has an upper roller provided above the front side supported by the upper rail of the cabin 7. Further, the intermediate rail provided at the upper and lower intermediate positions of the door 46 is supported by the intermediate roller provided in the cabin 7. Further, a lower roller provided below the front side of the door 46 via an auxiliary rail is supported by the lower rail provided in the cabin 7, whereby the door 46 slides along the outer surface of the cabin 7 or the side cover 35. The entrance can be opened and closed.

On the other hand, to briefly explain the interior relationship of the cabin 7, the windshield 40 is provided on the front portion of the ceiling frame 38a protruding like an eaves, the right front support column 38b and the left front support column 38d, and the upper part of the front connecting frame 38g. It is fitted into the front opening to be formed so that the upper side protrudes forward from the lower side so that, for example, the operator can visually recognize the front and lower weed plates 12 and the like in a standing posture. Further, the front panel 48 provided below the windshield 40 is bulged forward from the right front support column 38b and the left front support column 38d to secure a space for arranging the knees and feet of the operator (see FIG. 1).

Further, a stay in the left-right direction is provided behind the front panel 48, and a multi-steering lever 49 and an armrest 50 for steering the machine body and raising and lowering the cutting portion B are provided on the right side of the stay. Further, an ignition key for starting and stopping the engine is provided below the multi-steering lever 49, and an ECU (Electronic Control Unit) for controlling the liquid crystal monitor is provided on the left side thereof. A control panel (operation panel) 52 is provided above these to mount a liquid crystal monitor 51 that displays the engine speed and the working state in the center. Further, a rear panel is provided below the control panel 52 to cover the back side thereof (see FIG. 3).

Further, on the left operation frame 38k of the cabin frame 38, a side plate 53 having an inspection port, a lever guide plate 55 having a lever insertion hole and a switch case 54, and a rear plate 56 having a lever insertion hole as well as inclined rearward. And cover the lower side of the left side panel 41 with these plates (see FIGS. 3 and 7).

The left end of the control panel 52 is placed on the front side of the lever guide plate (operation panel) 55, and switches and operating tools frequently used during work are placed on the left end side of the control panel 52. With 57 as the front, a main shift lever 58 and an auxiliary shift lever 59 for operating the traveling HST and the auxiliary transmission of the transmission are provided behind the main shift lever 58. Further, the rear switch case 54 is provided with a switch or dial related to steering, threshing, DPF, etc., which are not frequently used.

Further, a lever guide is attached to the lever insertion hole of the rear plate 56 to provide a cutter / exhaust straw switching lever (not shown). The right end of the rear plate 56 constitutes a part of the cover mounting frame 38l as described later. Further, the inspection ports provided on the side plate 53 and the lever guide plate 55 are provided with removable lids 53a and 55a, and the lever linking mechanism and the like can be maintained from these inspection ports.

On the other hand, a rectangular plate 60 is attached to the floor frame 38j of the cabin 7, and a mat is laid on the plate 60 to form a floor. Further, the lower cover 61 composed of a rectangular plate is welded and fixed to the cover mounting frame 38l near the rear of the floor in the vertical direction. The right end of the cover mounting frame 38l is provided by welding to the lower side a of the right intermediate support 38c in the vertical direction. Further, a rear cover 62 is detachably provided above the rear side of the lower cover 61.

That is, the cover mounting frame 38l for mounting the rear cover 62 has a right side d extending from the middle side b of the right intermediate support 38c to the rear horizontal frame 38h, a left side e provided at the right end of the rear plate 56, and the front surface of the rear horizontal frame frame 38h. It is formed by a rectangular frame having an upper side f provided on the lower cover 61 and a lower side g provided on the rear side upper side of the lower cover 61. Therefore, a large maintenance opening is formed inside the frame. Then, if the rear cover 62 having a rectangular outer shape is closely supported on each side of the mounting frame 38l and fastened with the bolt 63, this opening can be closed.

At that time, the rear cover 62 is attached so as to be inclined rearward at approximately 60 degrees from the upper end of the lower cover 61 to the middle side b of the right intermediate support 38c. Further, since the rear plate 56 provided on the left side thereof is also provided at the same inclination angle, sufficient installation space for the air cleaner 36 and the exhaust purification devices 27 and 28 can be provided on the back side of the rear cover 62 and the rear plate 56. Further, the rear cover 62 can be removed to perform maintenance on the engine 23 and the exhaust purification devices 27 and 28 from the opening of the cover mounting frame 38l.

As shown in FIGS. 11 and 12, the rear cover 62 is integrally bent and formed with a recess 62a recessed on the back surface side so as to face above the engine 23 at the center thereof, and the left and right side surfaces of the recess 62a. Is closed by the fixed side plate 62b. Further, the reinforcing members 64 and 65 are fixed to the back surface of the rear cover 62 on the left and right and below the recess 62a. Further, the fitting side 66 protruding from the back surface of the rear cover 62 is provided so as to circulate.

Therefore, when the rear cover 62 is attached to the cover mounting frame 38l, the fitting side 66 fits into the cover mounting frame 38l to position the rear cover 62, and the recesses 62a and the reinforcing members 64 and 65 make the rear cover 62 rigid. The rear cover 62 can be attached to the cover attachment frame 38l with a small gap.

A rectangular inspection port 62c is provided near the bottom of the rear cover 62. This inspection port 62c is always closed with a lid 66, and when checking the amount of engine oil stored or replenishing engine oil, the lid 66 is removed with a bolt with a knob 63a, and work is performed from this inspection port 62c. It can be performed.

Further, the driver's seat 67, in which the operator sits and operates, is attached to the cabin 7 via a height adjusting device and a front-rear adjusting mechanism as shown in FIGS. 13 and 14. The front-rear adjustment mechanism includes a lower rail, an upper rail, a front-rear adjustment lever, and the like, lower rails 68a are fixed to the left and right sides of the seat mounting plate 68 in the front-rear direction, and upper rails 69a are fixed to the left and right sides of the seat bracket 69. Then, it is fitted to the lower rail 68a so as to be slidable back and forth. Then, a plurality of notches 68b are provided on the side surface of the lower rail 68a on the right side at predetermined intervals, the front-rear adjustment lever 70 is rotated to slide the driver's seat 67 back and forth, and then the front-rear adjustment lever 70 is used. The front-rear position of the driver's seat 67 can be adjusted by engaging the notch 70a provided at one end with the notch 68b.

Further, the height adjusting device includes a gas cylinder 72 provided with an elevating adjustment lever 71 and a cylinder bracket 73 for holding the gas cylinder 72, and the upper portion of the gas cylinder 72 is fitted to the lower surface of the seat mounting plate 68. The seat mounting plate 68 and the stay 73a of the cylinder bracket 73 are connected by a detent link 74. Then, as shown in FIG. 8, when the cylinder bracket 73 is bolted to the lower cover 61 and the stay 73a is bolted to the rear cover 62, the driver's seat 67 can be installed in the cabin 7, and the operator can perform this operation. When sitting on the seat 67 and operating the elevating adjustment lever 71, the height of the driver's seat 67 can be adjusted by the gas cylinder 72.

The driver's seat 67 includes a seat cushion (seat surface) 67a that is rotatably attached to the front end of the seat bracket 69, and a seat back (backrest) 67c that adjusts the inclination angle via a reclining adjuster 67b. From the normal state in which the rear part of 67a is placed on the seat bracket 69 via the elastic body 67d, the driver's seat 67 is rotated forward around a rotation fulcrum provided at the front end, and the seat back 67c is a reclining lever. It can also be folded onto the seat cushion 67a by operating the 67e.

Further, when the cylinder bracket 73 of the height adjusting device is attached to the lower cover 61 and the rear cover 62, the driver's seat 67 is lowered most, and the driver's seat 67 is moved to the rear, the rear part of the seat bracket 69, the lower part of the seat back 67c, and reclining. The adjuster 67b or the seat cushion 67a near the rear is accommodated in the recess 62a of the rear cover 62. Therefore, even if the cover conventionally provided apart from the driver's seat 67 is moved to the front to become the inclined rear cover 62, the driver's seat 67 can be arranged at the same position as before by the recess 62a. it can.

Therefore, the front multi-steering lever 49 can be comfortably operated while sitting in the driver's seat 67, and the display contents of the liquid crystal monitor 51 can be properly visually recognized. Further, it is possible to avoid deterioration of comfort, operability, etc. that occurs when the driver's seat 67 is moved forward while avoiding interference with the rear cover 62. Alternatively, for that purpose, the cabin 7 and the airframe can be compactly assembled without making the control unit A particularly large.

Then, the combine 1 configured as described above operates the ignition key to start the engine 23, and operates the main speed change lever 58 and the multi-steering lever 49 to perform moving traveling and cutting work. In this case, the engine 23 is pre-purified by the pre-cleaner 37 provided on the upper part of the machine body, and the clean air filtered by the air cleaner 36 is sucked in, and the fuel pressurized by the common rail system is injected into the cylinder via the injector. It is injected and burned to obtain rotational power.

Exhaust gas discharged from the engine 23 is guided to the DPF case 27 and the SCR case 28 via a connecting pipe, particulate matter such as soot is collected by the DPF, and nitrogen oxides are converted into harmless nitrogen by the SCR. It is converted and finally discharged from the exhaust port 76 of the tail pipe 75 connected to the SCR case 28 toward the rear of the machine body above the Glen tank 9.

Then, in the present invention, in particular, the air cleaner 36 is provided substantially directly above the radiator 30 and the engine 23 (on the center line of the crankshaft 23a) so that the longitudinal direction thereof is the left-right direction. Therefore, the connecting pipe 77 between the air cleaner 36 and the engine 23 can be made shorter than the air cleaner 36 provided near the rear of the engine 23, and the intake resistance during this period can be reduced. Further, when the air flow sensor provided for DPF regeneration is integrally provided with the air cleaner 36, there is no restriction on the length of the connecting pipe as in the case where the air flow sensor is provided in the middle of the connecting pipe, and the air cleaner is provided substantially directly above the engine 23. 36 can be provided by shortening the connecting pipe 77.

Further, the DPF case 27 and the SCR case 28 are also provided near the rear of the air cleaner 36 above the engine 23 so that their longitudinal directions are in the left-right direction. Therefore, the connecting pipes 78 and 79 that guide the exhaust gas from the engine 23 to these cases are shortened and introduced into the DPF and SCR without lowering the exhaust temperature as much as possible to effectively exert these purifying effects. Can be made to. Further, if the SCR case 28 is provided above the air cleaner 36 and the DPF case 27, the exhaust gas purification device can be compactly arranged above the engine 23, and invades the arrangement space of the Glen tank 9 and the like. Nor.

Moreover, if the DPF case 27 or SCR case 28, which becomes hot, is provided near the lower part of the machine body, there is a risk that straw debris generated during cutting work may come into contact with them and ignite, and it is necessary to separately provide a cover or the like to cover them. is there. However, if it is provided at a relatively high position above the engine 23, the chances of contact with straw debris and the like are reduced, and these can be blown away by the exhaust air of the cooling fan 25, which will be described later, and the ambient temperature of the case can also be lowered. Therefore, the risk of ignition can be eliminated without providing a special cover. Further, even when the exhaust port 76 of the tail pipe 75 connected to the SCR case 28 is provided at the upper part of the airframe to eliminate the risk of ignition, if the SCR case 28 is provided at a high position, the length of the tail pipe 75 can be shortened. It is advantageous to be able to do it.

On the other hand, the cabin 7 constituting the control unit A has a lower cover 61 that rises substantially vertically from the rear end of the floor 60 and a rear cover 62 that inclines backward from the upper end of the lower cover 61. These covers 61 and 62 partition the space and block noise, hot air, or dust that is about to enter the control unit A from the driving unit F. In addition, it plays the role of a guard that prevents the operator from coming into contact with the engine 23 or the like, which becomes hot.

Further, the lower cover 61 and the rear cover 62 serve as engine covers that cover the engine 23, the radiator 30, the air cleaner 36, and the exhaust purification devices 27 and 28 on the front side of the machine body when viewed from the driving unit F, and the engine cover. By blocking the engine 23 noise and vibration, the noise outside the vehicle is reduced. Further, the air flowing in from the side cover 35 by the cooling fan 25 is guided to the driving portion F without escaping to cool the driving portion F and prevent the engine 23 from overheating.

Therefore, when the cover surrounding the periphery of the prime mover F is reexamined, a side cover 35 for taking in outside air is provided on the front surface of the radiator 30 and the air cleaner 36 that cool the cooling water of the engine 23 by the suction air of the cooling fan 25, and the prime mover. It covers the right side of part F. Further, the rear side of the driving portion F is covered with the front wall of the Glen tank 9 and an engine cover provided separately. The front and upper sides of the driving portion F are covered by a lower cover 61 and a rear cover 62 that separate the interior and exterior of the cabin 7.

Therefore, the exhaust air of the cooling fan 25 passes around the engine 23 main body, the DPF case 27, or the SCR case 28 while avoiding the engine 23 main body, the DPF case 27, or the SCR case 28, and is finally exhausted from the open side of the aircraft or the lower side of the aircraft. Heat is taken from the engine 23 main body, the DPF case 27, or the SCR case 28 to cool the engine 23 and prevent overheating. However, in this case, if the space through which the exhaust air passes is small, the cooling fan 25 may be overloaded, and the heat taken away may be trapped in the driving portion F to raise the ambient temperature or raise the internal pressure.

Therefore, it is preferable that the accommodation space of the driving unit F surrounded by the cover described above is a well-balanced space having an appropriate size, and when the exhaust gas purifying devices 27 and 28 are provided in the driving unit F, As a matter of course, it is desirable to widen the accommodation space of the driving unit F. Therefore, in the present invention, the rear cover 62 that covers the front side of the airframe of the engine 23, the radiator 30, the air cleaner 36, and the exhaust purification devices 27 and 28 is tilted rearward to provide a space that is not particularly required for the control unit A. It is assigned to the prime mover F, which widens the accommodation space of the prime mover F without changing the layout of each part of the airframe, and optimizes the heat balance and internal pressure of the engine.

Further, if the cover partitioning between the driving part F and the control part A is formed in a stepped shape as in the conventional case, the number of plates increases depending on the combination of the vertical plate and the horizontal plate, or the plate needs to be bent, and the material cost thereof is increased. Processing and assembly costs will increase. Further, when the bent cover is attached to the mounting portion, a gap is not a little generated between the two, and dust enters the control portion A from the driving portion F through this gap, which is not preferable. However, since the lower cover 61 and the rear cover 62 are formed of two flat plates and can be attached to the cover mounting frame 38l in close contact with each other without a gap, sound insulation and dust resistance from the driving portion F are ensured. be able to.

Further, since the straw dust and the like falling on the rear cover 62 slides down toward the floor 60 due to the inclined surface that rises thereafter, the control unit A can be kept in a clean state. Since the air cleaner 36 is provided substantially directly above the engine 23 and the exhaust gas purification devices 27 and 28 are provided near the rear of the air cleaner 23, the exhaust gas purification devices 27 and 28 that become hot are provided in the rear cover 62 of the control unit A. It can be arranged as far away from the control unit A as possible, thereby reducing the thermal influence of the exhaust gas purification devices 27 and 28 on the control unit A and making the control unit A comfortable.

Further, when a recess 62a facing above the engine 23 is formed in the rear cover 62 and the recess 62a accommodates the driver's seat 67 near the lower part of the backrest 67c, the recess 62a makes the accommodation space of the driving portion F slightly smaller. Although it becomes narrower, the driver's seat 67 can be arranged in a substantially conventional position, so that the driver's seat 67 is moved forward and the control unit A is not enlarged or the driving operation is not affected. The part A can be compactly configured as a whole.

One side of the cover mounting frame 38l to which the lower cover 61 and the rear cover 62 are mounted is welded along the right intermediate support 38c which is the door receiving frame. Therefore, the cabin 7 can be manufactured at a lower cost than when the frame for the cover mounting frame 38l is separately welded from the right intermediate support 38c or the like, and the occurrence of welding distortion is reduced to improve the accuracy of the cabin 7. Can be raised.

Then, in the maintenance of the engine 23, for example, when inspecting the engine oil or radiator cooling water, or replacing the EGR cooler hose or the exhaust manifold, the bolt for attaching the cylinder bracket 73 is removed and the driver's seat 97 is removed. When the rear cover 62 is removed, a wide opening facing the front side of the engine 23 and the exhaust purification devices 27 and 28 appears, and these maintenance can be performed from this opening.

Further, when the side cover 35 of the engine 23 is opened, the intake portion of the air cleaner 36 and the radiator 30 can be cleaned and replaced, and the grain tank 9 is rotated to secure a working space and the engine 23. By removing the engine cover that covers the rear part, the engine oil filter can be replaced, the cooling fan belt can be inspected and adjusted, and the DPF differential pressure sensor hose pipe and EGR system piping can be replaced.

In the above embodiment, the control unit A is configured by the cabin 7, but the control unit A may not have a roof on the upper part, and the control unit A may be the aircraft as described in Prior Art Document 1. It may be rotated outward to perform maintenance of the engine 23 and the like. Further, the lower cover 61 may also be provided with an inspection port covered with a lid, and the present invention is not limited to the above embodiment.

1 Combine 2 Airframe frame 7 Cabin 23 Diesel engine 27 DPF case (first exhaust gas purification device)
28 SCR case (second exhaust gas purification device)
30 Radiator 36 Air cleaner 52 Control panel (operation panel)
55 Lever guide plate (operation panel)
60 plates (floor)
61 Lower cover 62 Rear cover 67 Driver's seat A Control part B Cutting part C Threshing part D Grain collecting part E Straw processing device F Driving part

Claims (4)

It features a diesel engine and a radiator in the lateral direction in the body frame, an air cleaner and the exhaust gas purifying device above the engine and the radiator is provided, also constitutes a steering unit comprising a driver's seat or control panel on these forward cabin A lower cover that rises substantially vertically from the rear end of the floor of the control unit and a rear cover that inclines backward from the upper end of the lower cover so that the front side of the engine, the radiator, the air cleaner, and the exhaust purification device is provided in the combine. The cabin is provided with a cabin frame and an entrance / exit to form a skeleton, and the intermediate column of the cabin frame, which is the door frame of the entrance / exit, has a lower side that rises substantially vertically from the rear end of the floor. It is configured to have a middle side that slopes upward from the lower side, and one side of the lower cover is attached to the lower side of the intermediate column and one side of the rear cover is attached to the middle side of the intermediate column via a mounting frame. A combine that is characterized by that. The air cleaner and the exhaust gas purifier have their longitudinal directions in the left-right direction which is the same direction as the crankshaft of the engine, and one air cleaner is substantially directly above the engine and the radiator, and the other exhaust gas purifier is The combine according to claim 1, wherein the combine is provided closer to the rear of the air cleaner. The combine according to claim 1 or 2, wherein a recess facing above the engine is formed in the rear cover of the control portion, and the recess is accommodated near the lower part of the backrest of the driver's seat. The combine according to any one of claims 1 to 3, wherein the rear cover of the control portion is detachably attached.

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