JP6198147B2 - Working part structure of work vehicle - Google Patents

Description

  The present invention relates to a prime mover structure of a work vehicle including an oxidation catalyst device that oxidizes unburned gas contained in engine exhaust gas.

  Conventionally, in order to prevent the fine particles contained in the engine exhaust gas from being scattered to the outside, there has been proposed a drive part structure for a working vehicle in which an exhaust gas purification device equipped with a collecting filter is provided inside the fuselage on the upper surface of the engine. (Patent Document 1).

  Also, it is placed in the space formed between the threshing device and the glen tank in order to prevent the exhaust gas exhausted from the engine from moving to the control part and to prevent the accumulation of sawdust etc. on the outer peripheral surface of the tail pipe An arrangement structure for tail pipes has been proposed in which the tail pipes are rearwardly inclined (Patent Documents 2 and 3).

JP 2013-1132 A JP 2012-60955 A JP 2012-60956 A

However, in the prime mover structure of the working vehicle of Patent Document 1, the tail pile that guides the exhaust gas of the exhaust gas purification device to the outside is arranged in the space formed between the threshing device and the glen tank so as to fall straight rearward. There is a risk of setting the width in the left-right direction of the work vehicle to be large. In addition, since there is no heat shield cover on the left side of the exhaust gas purification device, it is located in the intake chamber due to the heat of the exhaust gas purification device that has bypassed the heat shield cover and was transmitted to the control section, and the electrical components malfunctioned There was a problem falling into. Furthermore, since the inner side of the body of the exhaust gas purification apparatus protrudes from the heat shield cover toward the inner side of the body, there is a problem that the air heated by the exhaust gas purification apparatus is blown to the control part and the temperature inside the control part is increased.
Moreover, in the arrangement structure of the tail pipe of patent document 2, 3, since the tail pipe is arrange | positioned in the center part of the left-right direction of the space formed between a threshing apparatus and a glen tank, the threshing apparatus is by heat radiation from a tail pipe. It was difficult to promote the drying of the kernel. In addition, there is a risk that rainwater may enter the tape pipe from the exhaust port at the rear end of the tail pipe when it rains.
Therefore, the main problem of the present invention is to eliminate such problems.

The present invention that has solved the above problems is as follows.
The invention which concerns on Claim 1 arrange | positions a threshing apparatus (3) on the upper left side of a body frame (1), arrange | positions a Glen tank (5) on the right side of this threshing apparatus (3), and this Glen tank (5 ) Is arranged on the front side of the control unit (6), the engine (E) is arranged on the lower side of the control unit (6), and the engine (E) An oxidation catalyst device (11) that oxidizes unburned fuel in the exhaust gas discharged is disposed along the front-rear direction, and a tail pipe (30) is connected to the exhaust port (11F) at the rear of the oxidation catalyst device (11). And connecting the tailpipe (30) in a downwardly inclined manner to face the space formed between the threshing device (3) and the glen tank (5). Visually arranged along the right wall of the threshing device (3), Down the fuel tank (55) for storing fuel supplied to the (E), arranged on the lower side of the grain tank (5) in a plan view, the upper front portion of the oxidation catalyst device (11), said steering unit A front panel (40) that supports the side panel (6A) of (6) and the cockpit (6F) of the control unit (6) is disposed, and the control unit is disposed above the rear portion of the oxidation catalyst device (11). (6) A detachment clutch provided on the side panel (6A) by disposing a guide plate (42) extending from the rear plate (41) supporting the air cleaner (6G) provided at the rear to the inside of the machine body The lever (6B) is disposed on the inner side of the airframe than the oxidation catalyst device (11), and the side panel (6A) extends outward from the airframe and the front side of the rear plate (41). Before extending horizontally The (41A), said guide plate (42) is arranged at the same height in the upper than in the extending portion (12D) and the front horizontal portion (41A), characterized in that Ueno said front plate (40) This is a driving part structure of the working vehicle.

  The invention which concerns on Claim 2 connects the lower part of the said threshing apparatus (3), and the upper part of a grain tank (5) with a mashing cylinder (9), and the said tail pipe (30) is a cereal cylinder ( 9. The drive part structure of the working vehicle according to claim 1, wherein the structure is biased toward the threshing device (3) side relative to the center in the left-right direction of 9).

  The invention according to claim 3 arranges the tail pipe (30) across the air inlet (21A) of the tang (21) provided in the threshing device (3) in a side view, and the tail pipe (30). The exhaust port structure (32D) is provided on the lower side of the base portion of the cereal cylinder (9).

  The invention according to claim 4 is characterized in that the tail pipe (30) is connected to the first tail pipe (31) connected to the exhaust port (11F) and the rear part of the first tail pipe (31). It forms with 2 tail pipes (32), The internal diameter of the front-end part of the said 2nd tail pipe (32) was formed larger diameter than the outer diameter of the rear-end part of the 1st tail pipe (31). 4. The driving part structure of the working vehicle according to any one of items 3 to 3.

According to the first aspect of the present invention, the oxidation catalyst device (11) that oxidizes unburned fuel in the exhaust gas discharged from the engine (E) is disposed in the front-rear direction at a portion inside the fuselage at the upper part of the engine (E). The tail pipe (30) is connected to the exhaust port (11F) at the rear part of the oxidation catalyst device (11), and the tail pipe (30) is arranged in a rearward downward slope, and the threshing device (3) Facing the space formed between the Glen tanks (5), the tail pipe (30) is arranged close to the right wall of the threshing device (3) in plan view and supplied to the engine (E). Since the fuel tank (55) for storing fuel is disposed below the Glen tank (5) in plan view, the threshing device (3) and the Glen tank (5) can be disposed close to each other, The width of the aircraft can be set narrow Kill. In addition, a large storage capacity of the Glen tank (5) and the fuel tank (55) can be secured, and an increase in the temperature of the fuel stored in the fuel tank (55) is prevented by heat radiation from the tail pipe (30), and the engine. The high combustion efficiency of (E) can be maintained.
Further, on the upper side of the front part of the oxidation catalyst device (11), a front plate (40) for supporting the side panel (6A) of the control unit (6) and the control seat (6F) of the control unit (6) is arranged, A guide plate (42) extending from the rear plate (41) supporting the air cleaner (6G) provided at the rear portion of the control portion (6) to the inside of the machine body is disposed above the rear portion of the oxidation catalyst device (11). Since the mowing and releasing clutch lever (6B) provided on the side panel (6A) is arranged on the inner side of the body than the oxidation catalyst device (11), the height of the side panel (6A) can be set low. It is possible to easily operate the detachment clutch lever (6B) provided on the side panel (6A). Electrical components disposed in the vicinity of the air cleaner (6G) of the control unit (6) by blocking heat generated in the oxidation catalyst device (11) transmitted to the control unit (6) by the rear plate (41) and the guide plate (42). It is possible to prevent malfunction of parts.
Further, an extension part (12D) extending to the outer side of the machine body on the side panel (6A) and a front horizontal part (41A) extending to the front side of the machine body on the rear plate (41) are located above the guide plate (42). Since the front plate (40) is mounted on the extension part (12D) and the front horizontal part (41A), the air heated by the oxidation catalyst device (11) is placed in the extension part (11). 12D) and the front plate (40) and the gap between the front horizontal part (41A) and the front horizontal part (41A) can be prevented from entering the control part (6), and the operating environment of the control part (6) is preferable. Can be maintained.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the lower part of the threshing device (3) and the upper part of the grain tank (5) are communicated with each other by the milling cylinder (9). Since (30) is arranged biased to the threshing device (3) side from the center in the left-right direction of the cerealing cylinder (9) in plan view, the threshing device (3) is radiated from the tail pipe (30). The drying of the threshing kernel inside can be promoted.

According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the tail pipe (30) is provided with the air inlet (21A) of the tang (21) provided in the threshing device (3) in a side view. ) across the place, Te Rupaipu (30) of the exhaust port and (32D), so are arranged below the base of the AgeKoku cylinder (9), the tail pipe (30) by winnowing fan (21) The surrounding heated air can be sucked into the threshing device (3) to promote drying of the threshing kernel in the threshing device (3) more effectively. Moreover, the outer peripheral part of a tail pipe (30) can be cooled with the ventilation accompanying the suction | attraction | suction of a Kara (21). Furthermore, the piping resistance of the tape pipe (30) can be reduced and the exhaust gas can be efficiently discharged to the outside from the exhaust port (32D).

  According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the tail pipe (30) is connected to the exhaust port (11F). (31) and the second tail pipe (32) connected to the rear portion of the first tail pipe (31), and the inner diameter of the front end portion of the second tail pipe (32) is set to the first tail pipe (31). Since the outer diameter of the rear end of the first tail pipe (31) is larger than the outer diameter of the rear end of the first tail pipe (31) and the second tail pipe (32), the air is taken in from the front end of the tail pipe. (30) The temperature of the exhaust gas exhausted inside can be lowered.

It is a right view of a combine. It is a top view of a combine. It is a right view of an engine and an oxidation catalyst device. It is a top view of an engine and an oxidation catalyst device. It is a rear view of an engine and an oxidation catalyst device. It is a left view of an engine and an oxidation catalyst device. It is a right view explaining arrangement | positioning of a tail pipe. It is a top view explaining arrangement | positioning of a tail pipe. It is a left view explaining arrangement | positioning of a tail pipe. It is the perspective view seen from the right rear side explaining arrangement | positioning of a tail pipe. It is the perspective view seen from the right rear side which removed the fuel tank of FIG. It is a top view of a control part. It is explanatory drawing explaining the arrangement position of a side panel and a front plate. It is explanatory drawing explaining the arrangement position of a side panel and a rear plate. It is a principal part right view of a control part. It is explanatory drawing explaining the arrangement position of a cutting / decoupling clutch lever, a main transmission lever, and a subtransmission lever. It is the top view which made the engine room cover the open state.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. For the sake of easy understanding, the explanation is given with the direction shown for the sake of convenience with the front as the front, the rear as the rear, the right hand side as the right side, and the left hand side as the left side, as viewed from the operator boarding the cockpit. However, the configuration is not limited by these.

As shown in FIGS. 1 and 2, the combine is provided with a traveling device 2 composed of a pair of left and right crawlers on the lower side of the body frame 1, and on the left side of the upper part of the body frame 1 threshing / sorting is performed. 3 are mounted on the front side of the threshing device 3, cutting device 4 is provided to harvest fields of grain stalks. The grains threshed and selected by the threshing apparatus 3 are stored in a Glen tank 5 provided on the right side of the threshing apparatus 3, and the stored grains are discharged to the outside by the discharge cylinder 7. In addition, the grain threshed and selected by the threshing device 3 is ground into the Glen tank 5 by the threshing cylinder 9 that communicates the lower part of the right wall of the threshing device 3 and the upper part of the left wall of the Glen tank 5.

  On the front side of the Glen tank 5, a control unit 6 having a control seat 6F on which an operator is boarded is provided, and below the control unit 6, an engine room 8 on which an engine E is mounted is provided. An engine room cover 8A for maintenance / inspection of the engine room 8 is attached to the right side of the engine room 8, and a filter body 8B is provided at the middle and lower parts of the engine room cover 8A in the vertical direction. ing.

  As shown in FIGS. 3 to 6, an oxidation catalyst device 11 such as a DOC that oxidizes unburned fuel in exhaust gas discharged from the engine E is attached to the upper left side of the engine E. Thereby, the air heated by the oxidation catalyst device 11 can be sucked into the threshing device 3 by the red pepper 21 and the drying of the grain threshed in the threshing device 3 can be promoted.

  The oxidation catalyst device 11 is detachably attached to a stay 11B provided on the upper left side of the engine E by two support members 11A on the front and rear sides. Further, the left side portion of the support member 11 </ b> A located on the front side is connected to a stay 11 </ b> E extending in the left-right direction from the upper right side of the engine E. Thereby, the rigidity of the support member 11A and the stay 11B is increased, and the deformation of the support member 11A and the stay 11B due to vibration of the engine E can be prevented, and the oxidation catalyst device 11 can be reliably supported.

  In order to efficiently oxidize the unburned fuel in the exhaust gas while maintaining the temperature in the oxidation catalyst device 11 within a predetermined operating temperature range, the temperature sensor 11D that measures the temperature of the oxidation catalyst device 11 includes an oxidation catalyst. It is attached at a predetermined distance from the outer periphery of the device 11. Thereby, the temperature rise of the temperature sensor 11D is suppressed by heat radiation from the oxidation catalyst device 11, and erroneous temperature measurement of the temperature sensor 11D can be prevented. Reference numeral 60 denotes a crankshaft, reference numeral 60A denotes a water pump shaft, reference numeral 60B denotes a flywheel shaft, reference numeral 60D denotes an alternator shaft, and reference numeral 60E denotes a belt.

  Next, the arrangement of the tail pipe 30 that exhausts the exhaust gas treated by the oxidation catalyst device 11 to the outside will be described.

  As shown in FIGS. 7 and 9, the tail pipe 30 is connected to the first tail pipe 31 whose front part is fixed to the exhaust port 11 </ b> F provided in the rear part of the oxidation catalyst device 11 and the rear part of the first tail pipe 31. The second tail pile 32 is configured.

  The exhaust port 11 </ b> F of the oxidation catalyst device 11 is formed on the left side of the rear portion of the oxidation catalyst device 11. The first tail pipe 31 extends downwardly from the front portion connected to the exhaust port 11F in a side view. The second tail pipe 32 inclines downward from the front part where the rear part of the first tail pipe 31 is inserted in a side view and crosses the air inlet 21A of the carp 21 to the rear side of the air inlet 21A of the carp 21. Between the front pipe 32A that extends, and the rear side of the front pipe 32A that curves and falls downward, between the rear side of the air inlet 21A of the tang 21 and the front side of the first metal part 9A that is the base of the milling cylinder 9 The intermediate pipe 32B extends, and the rear pipe 32C is curved at the rear portion of the intermediate pipe 32B and is inclined downward and extends beyond the lower side of the first metal portion 9A to the rear side. Further, the exhaust port 32D formed in the rear portion of the rear pipe 32C is located below the substantially intermediate portion in the front-rear direction of the fuel tank 55 that stores the fuel to be supplied to the engine E in a side view, and the fuselage frame. It is located below 1. Thereby, the air around the front pipe 32A heated by the high-temperature exhaust gas exhausted to the front pipe 32A is sucked into the threshing device 3 by the red pepper 21 and the threshing-treated grain in the threshing device 3 is dried. The surface temperature of the front pipe 32 </ b> A can be lowered by blowing air sucked by the tang 21. Moreover, the grain remaining in the first metal portion 9A of the whipped cylinder 9 can be easily collected. Furthermore, the pipe resistance of the rear pipe 32C of the second tail pipe 32 can be reduced, and the exhaust gas discharged from the exhaust port 32D of the rear pipe 32C to the outside can be prevented from being blown back.

  The rearward downward inclination angle of the first tail pipe 31 and the downward downward inclination angle of the front pipe 32A and the rear pipe 32C of the second tail pipe 32 are set to substantially the same inclination angle. Further, the rearward downward inclination angle of the second tail pipe 32 is set to be steeper than the rearward downward inclination angle of the front pipe 32A and the rear pipe 32C of the second tail pipe 32.

  On the rear side of the whipping cylinder 9, there is provided a conveying cylinder 10 for mashing a so-called second processed material such as stabbed grains in the handling room of the threshing device 3. The first metal portion 9 </ b> A of the whipping cylinder 9 is connected to the inside of the machine body of the first receiving bowl 51 that collects the grain threshed by the threshing device 3. Further, the second metal portion 10A, which is the base portion of the transport cylinder 10, is connected to the inside of the machine body of the second receiving rod 53 that collects the second processed material. The second receiving rod 53 is provided on the rear side of the first receiving rod 51.

  As shown in FIG. 8, the first tail pipe 31 extends from the front part connected to the exhaust port 11 </ b> F of the oxidation catalyst device 11 toward the left side in a plan view, and then curves and extends toward the rear side. doing. The front pipe 32A of the second tail pipe 32 extends from the front part where the rear part of the first tail pipe 31 is inserted in the plan view to the rear right side to the front part of the space between the threshing device 3 and the glen tank 5. After extending toward the back side. The intermediate pipe 32B of the second tail pipe 32 extends from the rear part of the front pipe 32A toward the rear side, and the rear pipe 32C of the second tail pipe 32 extends from the rear part of the intermediate pipe 32B toward the rear side. It is extended. Further, the fuel tank 55 is disposed below the Glen tank 5 in a plan view and at a position facing the cerealing cylinder 9 and the conveying cylinder 10. Thereby, the temperature rise of the fuel stored in the fuel tank 55 can be prevented, and the combustion efficiency of the engine E can be increased.

  The front pipe 32A, the intermediate pipe 32B, and the rear pipe 32C that are arranged in the space between the threshing device 3 and the Glen tank 5 are threshing devices more than the center in the left-right direction of the whipping cylinder 9 in plan view. It is arranged to be biased to the 3 side, is arranged close to the right wall of the threshing device 3, and is arranged straight along the right wall of the threshing device 3 toward the rear side. In addition, it is preferable that the front pipe 32A, the intermediate pipe 32B, and the rear pipe 32C are arranged so as to be biased toward the threshing device 3 with respect to the left-right direction center of the first metal portion 9A in a plan view. Thereby, drying of the threshed grain in the threshing apparatus 3 can be further promoted by heat radiation from the front pipe 32A, the intermediate pipe 32B, and the rear pipe 32C.

  As shown in FIGS. 7 to 9, the inner diameter of the front end of the front pipe 32 </ b> A of the second tail pipe 32 is formed larger than the outer diameter of the rear end of the first tail pipe 31. When exhaust gas is discharged from the front pipe 32A to the front pipe 32A, the temperature of the exhaust gas discharged into the front pipe 32A by drawing air from the gap between the rear end portion of the first tail pipe 31 and the front end portion of the front pipe 32A is set. Can be reduced.

  A valve unit 37, which is a supply valve for driving oil such as a rolling cylinder 58, is attached to the left front portion of the machine body frame 1. The valve unit 37 is electrically connected to a controller 6L described later via a valve harness 38. The valve harness 38 is attached to the machine body frame 1 located on the front side of the threshing device 3. Thereby, deterioration of the valve harness 38 can be prevented by heat radiation from the tail pipe 30.

  As shown in FIG. 10, the fuel pipe 56 connecting the fuel tank 55 and the engine E extends from the lower part of the fuel tank 55 toward the front side, then curves at the rear side of the control unit 6 and toward the left side. It is extended. Thereby, the temperature rise of the fuel passing through the fuel pipe 56 can be prevented by the heat radiation from the tail pipe 30, and the combustion efficiency of the engine E can be improved.

  As shown in FIG. 11, two rolling cylinders 58 that adjust the inclination of the airframe in the left-right direction are attached to the airframe frame 1 at a predetermined interval in the left-right direction. The second tail pipe 32 of the tail pipe 30 is disposed at an intermediate position between the two rolling cylinders 58 in the left-right direction. Thereby, deterioration of the rolling cylinder 58 can be prevented by heat radiation from the tail pipe 30.

  The right front part of the second tail pipe 32 is attached to the left rear frame 1D of the control unit 6 described later via a support member 35. Thereby, the second tail pipe 32 can be easily attached to the left rear frame 1D, and the arrangement position of the second tail pipe 32 can be easily adjusted.

  Next, the control unit 6 provided on the upper side of the engine room 8 will be described.

As shown in FIG. 12, the control unit 6 includes a front plate 40 that supports the cockpit 6F, and a rear plate 41 that supports an air cleaner 6G that purifies air supplied to the engine E on the rear side of the front plate 40. Is provided. Further, a front panel 6D equipped with a display 6C that displays the drive state of the combine is provided at the front of the control unit 6, and an operator maintains an operation posture on the upper side of the front panel 6D. A gripping portion 6E that extends in the left-right direction for gripping is provided. Furthermore, on the left side is the inboard steering unit 6, the traveling hydraulic stepless transmission 1K and main shift lever 6I to remotely control, provided the transmission mechanism in the transmission in accordance with the inclined state of UeTatsuKoku culm A sub-transmission lever 6H for switching the stepped sub-transmission device and a cutting / clutching clutch lever 6B for releasing and connecting the rotational power transmitted from the engine E to the threshing device 3 and the mowing device 4 are mounted. A side panel 6A is provided. In addition, the oxidation catalyst device 11 having the longitudinal direction arranged in the front-rear direction has a guide plate 42 extending toward the left side from the left side portion of the front plate 40, the right side portion of the rear portion of the side panel 6A, and the inclined portion 41E of the rear plate 41. Located on the underside.

  As shown in FIGS. 12, 13, and 15, the right side portion of the front plate 40 is detachably fixed to the engine room cover 8 </ b> A of the engine room 8 with bolts. As shown in FIG. 17, the engine room cover 8A of the engine room 8 swings in the left-right direction when opening and closing, with a support shaft 49 extending in the front-rear direction supporting the lower portion of the engine room cover 8A. When the engine room cover 8A is opened and closed, the front plate 40 and the rear plate 41 connected to the engine room cover 8A are simultaneously opened and closed. Thereby, maintenance / inspection work of the oxidation catalyst device 11 disposed under the front plate 40, replacement work of the electrical base 6J disposed under the rear plate 41, and the like can be easily performed. it can.

  The left side portion of the front plate 40 is placed on the upper portion of the sealing material 12E attached to the upper surface of the extending portion 12D extending from the lower right portion of the side panel 6A toward the right side. Thereby, the air heated by the oxidation catalyst device 11 can be prevented from entering the cockpit 6F from the gap between the left side portion of the front plate 40 and the extending portion 12D of the side panel 6A.

  On the lower surface of the left side portion of the front plate 40, a bracket 13 that supports a support shaft 13A extending in the front-rear direction is provided. A base portion of a hook 15 is rotatably attached to the support shaft 13A, and the hook portion 15 engages with a fixing pin 14 having a base portion fixed to a front portion of a left rear horizontal frame 1H described later. When the tip of the hook 15 is engaged with the fixing pin 14, the engine room cover 8A of the engine room 8 cannot be opened and closed, and the engine room cover 8A of the engine room 8 is opened and closed. For this, it is necessary to disengage the tip of the hook 15 from the fixing pin 14.

  The rear portion of the front plate 40 is placed on the upper portion of the sealing material 16 attached to the upper surface of the front portion of the front horizontal portion 41A of the rear plate 41. Thereby, the air heated by the oxidation catalyst device 11 can be prevented from entering the cockpit 6F from the gap between the rear portion of the front plate 40 and the front portion of the front horizontal portion 41A of the rear plate 41.

  As shown in FIGS. 12, 14, and 15, the rear plate 41 includes a rear horizontal portion 41C on which the air cleaner 6G is mounted, a front vertical portion 41B extending upward from the front end portion of the rear horizontal portion 41C, and a front vertical portion. The front horizontal portion 41A extends from the upper end portion of the portion 41B toward the front side, and the rear vertical portion 41D extends downward from the rear end portion of the rear horizontal portion 41C. Further, the left end of the front vertical part 41B is formed to be inclined toward the left from the lower part toward the upper part, and on the left end part of the rear horizontal part 41C and the left end part of the front vertical part 41B, An inclined portion 41E extending from the left end portion of the front vertical portion 41B toward the rear side is provided. In the vertical direction, the front horizontal portion 41A is disposed at substantially the same position as the front plate 40, and the upper portion of the inclined portion 41E is on the right side of the guide plate 42 extending from the inclined portion 41E toward the left side. The end is mounted via a seal member.

  The right side portion of the rear horizontal portion 41C is placed on the upper surface of the right horizontal frame 1a extending in the front-rear direction connecting the right front frame 1A and the right rear frame 1B, and the left side portion of the rear horizontal portion 41C is the left rear side. It is mounted on an intermediate horizontal frame 1J extending from the frame 1D toward the front side.

  As shown in FIGS. 12 and 14, the guide plate 42 is disposed above the rear portion of the oxidation catalyst device 11 at a predetermined interval, and the left side portion of the guide plate 42 is the lower surface of the left rear horizontal frame 1H. And extends leftward beyond the left rear horizontal frame 1H. The left rear horizontal frame 1H has a base fixed to a traveling hydraulic continuously variable transmission 1K attached to the body frame 1 and extends in the vertical direction to the front side of the oxidation catalyst device 11 in a side view. It is fixed to the upper part of 1C and extends from the upper part of the left front frame 1C toward the rear side.

The guide plate 42 is disposed below the front plate 40 in a front view, and the upstream air outlet A1 that blows air from the right side to the left side between the rear portion of the oxidation catalyst device 11 and the guide plate 42 It is formed larger than the passage opening A2 and the downstream opening A3 of the outside air. Thereby, the outside air sucked by the intake fan 20 provided between the engine E and the radiator 50 is blown to the upper side of the oxidation catalyst device 11, and the surrounding air heated by the oxidation catalyst device 11 is efficiently discharged to the outside. It is possible to prevent malfunction of the electrical board 6J and the controller 6L due to a rise in the temperature around the oxidation catalyst device 11.
In the present specification, the size of the upstream port A1 is the length of the outer peripheral surface of the oxidation catalyst device 11 and the lower end portion of the inclined portion 41E on a line connecting the center of the oxidation catalyst device 11 and the lower end portion of the inclined portion 41E in front view. In other words, the size of the passage opening A2 refers to the outer peripheral surface of the oxidation catalyst device 11 and the guide plate on a line connecting the center of the oxidation catalyst device 11 and the portion of the guide plate 42 facing the center of the oxidation catalyst device 11 in a front view. 42 is the length of the lower surface of the downstream port A3. The size of the downstream port A3 is the oxidation on the line connecting the center of the oxidation catalyst device 11 and the portion of the guide plate 42 facing the lower right end of the left rear horizontal frame 1H in front view. The length of the outer peripheral surface of the catalyst apparatus 11 and the lower surface of the guide plate 42 is said. Also, the outside air sucked by the intake fan 20 is blown to the lower side of the oxidation catalyst device 11.

  Further, a portion of the guide plate 42 between the passage opening A2 and the right lower end portion of the left rear horizontal frame 1H is inclined downward from the passage opening A2 toward the right lower end portion of the left rear horizontal frame 1H. Has been. Accordingly, a large amount of outside air sucked by the intake fan 20 can be guided to the left outer peripheral surface of the rear portion of the oxidation catalyst device 11, and the oxidation catalyst device 11 can be efficiently cooled. In addition, in order to induce a lot of outside air sucked by the intake fan 20 to the left outer peripheral surface of the rear portion of the oxidation catalyst device 11, a portion extending to the left side of the left rear horizontal frame 1H in the guide plate 42 is directed downward. It can also be extended toward.

  As shown in FIGS. 12, 14, and 15, the side panel 6A is fixed to the left side of the rear portion of the front panel 6D. The side panel 6A includes a left side wall 12A extending in the vertical direction in the front view, a right side wall 12C extending in the vertical direction, and an upper side of the right side wall 12C connecting the upper side of the left side wall 12A and the right side wall 12C. The upper wall 12B is provided to be inclined upward toward the upper portion of 12A, and an extension portion 12D extending toward the right side is formed at the lower end portion of the right side wall 12C. A sub-transmission lever opening 17A through which the sub-transmission lever 6H is inserted is opened on the left side of the front portion of the upper wall 12B of the side panel 6A. A main transmission lever 6I is installed on the right side of the sub-transmission lever opening 17A. The main transmission lever opening 17B to be inserted is opened, and the cutting / clutching clutch lever 6B is inserted into a portion located on the left side of the rear portion of the upper wall 12B of the side panel 6A and on the left side of the oxidation catalyst device 11. The cutting clutch release lever opening 17C is opened. By providing the mowing / disengaging clutch lever 6B at a position biased to the left of the oxidation catalyst device 11, the height in the vertical direction of the side panel 6A can be set low, and the mowing position is separated from the cockpit 6F. Since the clutch release lever opening 17C is opened, the air heated by the oxidation catalyst device 11 that has passed through the cutting clutch release lever opening 17C can be prevented from reaching the cockpit 6F.

  The base portion of the auxiliary transmission lever 6H is rotatably supported by a support shaft (not shown) horizontally provided on the left surface of the left front horizontal frame 1L, and the base portion of the main transmission lever 6I is disposed laterally on the right surface of the left front horizontal frame 1L. The support shaft 18A is rotatably supported, and the base portion of the cutting / clipping clutch lever 6B is rotatably supported by a support shaft 18B provided horizontally on the left surface of the left rear horizontal frame 1H. Note that the left front horizontal frame 1L is fixed to an intermediate portion in the upper part of the left front frame 1C extending in the vertical direction on the front side of the oxidation catalyst device 11 in a side view, and forward from the intermediate portion in the upper part of the left front frame 1C. It extends towards.

  As shown in FIGS. 12, 14, and 15, an air cleaner 6 </ b> G arranged on the upper surface of the rear horizontal portion 41 </ b> C of the rear plate 41 with the longitudinal direction facing the left-right direction is mounted. The air cleaner 6G is covered with a substantially rectangular parallelepiped intake chamber 6K in which an opening is formed in a lower portion detachably attached to the upper side of the rear plate 41.

  The rear plate 41 is disposed above the central portion of the oxidation catalyst device 11 in a front view and below the upper portion of the oxidation catalyst device 11, and the lower portion of the air cleaner 6G is oxidized in a front view. The catalyst device 11 is disposed above the center of the catalyst device 11 and below the upper portion of the oxidation catalyst device 11. As a result, the vertical height of the intake chamber 6K that houses the air cleaner 6G can be set low.

The intake hose 77 connected to the intake port 76A of the air cleaner 6G extends downward from the left side to the right side when viewed from the front, and then curves downward, and the intake port 77A of the intake hose 77 is connected to the engine. It is located between the room cover 8A and the radiator 50. As a result, clean outside air from which dust or the like has been removed by the filter body 8B can be sucked into the air cleaner 6G, and there is no need to provide a precleaner that is a device for removing dust or the like mixed in outside air, reducing the number of parts. can do.
Similarly, a discharge port 76B for discharging fine dust and the like in the outside air removed in the air cleaner 6G is a net (not shown) that is stretched on the right side that is the outer side of the engine room cover 8A and the radiator 50. Arranged between. Thereby, the fine dust discharged | emitted from the discharge port 76B of the air cleaner 6G is captured by a net | network, and it can prevent that dust adheres to the radiator 50, the engine E, etc. FIG.

  A controller 6L for controlling the operation of the engine E, the oxidation catalyst device 11 and the like is disposed on the upper left side of the air cleaner 6G in the intake chamber 6K, and a fuse case 6M is disposed on the right side, between the controller 6L and the fuse case 6M. Are provided with a plurality of electrical boards 6J. Thereby, the controller 6L and the temperature sensor 11D attached to the oxidation catalyst device 11 can be easily connected, and the fuse in the fuse case 6M can be easily replaced.

DESCRIPTION OF SYMBOLS 1 Airframe frame 3 Threshing apparatus 5 Glen tank 6 Steering part 6A Side panel 6B Cutting / clipping clutch lever 6F Pilot seat 6G Air cleaner 9 Flouring cylinder 11 Oxidation catalyst apparatus 11F Exhaust port 12D Extension part 20 Intake fan 21 Karatsu 21A Inlet 30 Tail Pipe 31 First tail pipe 32 Second tail pipe 32D Exhaust port 40 Front plate 41 Rear plate 41A Front horizontal portion 42 Guide plate 50 Radiator 55 Fuel tank A1 Upstream port A2 Passage port A3 Downstream port E Engine

Claims (4)

The threshing device (3) is arranged on the left side of the upper side of the machine frame (1), the Glen tank (5) is arranged on the right side of the threshing device (3), and the control unit (6 ), And the engine (E) is arranged below the control unit (6).
An oxidation catalyst device (11) that oxidizes unburned fuel in the exhaust gas discharged from the engine (E) is disposed along the front-rear direction at a site inside the fuselage at the top of the engine (E).
A tail pipe (30) is connected to the exhaust port (11F) at the rear of the oxidation catalyst device (11);
The tailpipe (30) is arranged in a downwardly inclined manner so as to face the space formed between the threshing device (3) and the glen tank (5),
A fuel tank (55) in which the tail pipe (30) is disposed close to the right wall of the threshing device (3) in plan view and stores fuel to be supplied to the engine (E) is shown in plan view. Place under the Glen tank (5) ,
A front plate (40) for supporting the side panel (6A) of the control unit (6) and the control seat (6F) of the control unit (6) is disposed above the front part of the oxidation catalyst device (11). ,
On the upper side of the rear portion of the oxidation catalyst device (11), a guide plate (42) extending from the rear plate (41) supporting the air cleaner (6G) provided at the rear portion of the control portion (6) to the inside of the machine body. Place and
The mowing and releasing clutch lever (6B) provided on the side panel (6A) is arranged on the inner side of the body than the oxidation catalyst device (11),
The side panel (6A) has an extension part (12D) extending to the outside of the machine body and a front horizontal part (41A) extending to the machine body front side of the rear plate (41) above the guide plate (42). The driving part structure of the working vehicle , wherein the front plate (40) is mounted on the extension part (12D) and the front horizontal part (41A) .   The lower part of the threshing device (3) and the upper part of the Glen tank (5) are communicated with the whipping cylinder (9), and the tail pipe (30) is connected to the threshing cylinder (9) from the center in the left-right direction in plan view. The motive part structure of the working vehicle according to claim 1, which is biased toward the threshing device (3) side.   The tail pipe (30) is disposed across the air inlet (21A) of the tang (21) provided in the threshing device (3) in a side view, and the exhaust port (32D) of the tail pipe (30) is provided. The structure of the driving part of the working vehicle according to claim 2, which is arranged below the base part of the milling cylinder (9).   The tail pipe (30) is formed of a first tail pipe (31) connected to the exhaust port (11F) and a second tail pipe (32) connected to the rear part of the first tail pipe (31). The inner diameter of the front end of the second tail pipe (32) is larger than the outer diameter of the rear end of the first tail pipe (31). The structure of the driving part of the working vehicle.

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