JP2008068719A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester capable of preventing flow of an exhaust gas discharged from a tail pipe to a driving operation unit side, and further collectively discharging cooled air from a cooling fan flowing in an engine compartment from an insertion port of the tail pipe. <P>SOLUTION: A driving operation unit 18 is provided above a body frame 13. An engine 34 and a silencer 42 are arranged in the engine compartment 32 formed below the driving operation unit 18. A tail pipe 61 for discharging an exhaust from the silencer 42 extends backwardly and upwardly. In a combine harvester 11, a radiator 40 and a cooling fan 35 for sucking the outside air for cooling the radiator 40 and the engine 34 are provided on the engine 34 and the silencer 42 on one side in the right-to-left direction, a thermal barrier plate 50 extending backwardly and upwardly along the tail pipe 61 from the side of the engine compartment 32 is provided between the tail pipe 61 and the driving operation unit 18. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a combine, and more particularly, to a configuration of an exhaust device piped on an upper part of a combine body.

  Conventionally, an exhaust device for a combine is piped from the engine to the rear side of the fuselage through the lower part of the fuselage, and exhaust gas generated by the engine is discharged behind the fuselage. The exhaust device includes an exhaust silencer that reduces exhaust noise, a tail pipe that exhausts exhaust gas, and the like (see, for example, Patent Document 1).

  However, when an exhaust device such as an exhaust silencer or a tail pipe is piped at the lower part of the machine body, mud or the like wound during traveling tends to be applied to the exhaust device. When mud or the like is applied to the exhaust device, mud or the like may be trapped and adhered to the exhaust silencer or the tail pipe, or mud or the like may enter the tail pipe. In particular, when the combine travels in a wet field, a large amount of mud or the like adheres to the exhaust device, and the intrusion of mud or the like into the exhaust device also increases, resulting in a decrease in the travel performance of the combine.

  For this reason, there is also a combine technology in which an exhaust device is piped on the upper part of the fuselage. As a combine equipped with such an exhaust device, for example, an exhaust silencer is provided in an engine room, and a tail pipe connected to the exhaust silencer. Is piped above the fuselage, and the rear part of the tail pipe is fixed to the upper part of the threshing part (see, for example, Patent Document 2). There is also a combine in which an exhaust pipe from the engine is piped above the fuselage, an exhaust silencer connected to the exhaust pipe is fixed to the upper part of the threshing portion, and a tail pipe is connected to the exhaust silencer.

According to the combine in which the exhaust device is piped on the upper part of the fuselage as described above, it is difficult for mud or the like wound up during traveling to get caught in the exhaust device, mud etc. Is prevented from entering. For this reason, it is possible to prevent a drop in the traveling performance of the combine due to the inclusion of mud or the like in the exhaust device or the intrusion of mud or the like.
JP 2005-261279 A Japanese Utility Model Publication No. 61-26130

However, in the conventional exhaust device, the surface temperature of the exhaust device becomes high due to the heat of the exhaust gas, so that the temperature around the engine room becomes high, and the warmed air is not easily discharged, so that it accumulates around the exhaust air. . In addition, exhaust air exhausted from the tail pipe when the aircraft is moving backward may flow toward the operation unit, and hot air may flow toward the operator.
The present invention has been made in view of the above problems, and prevents exhaust gas discharged from the tailpipe from flowing to the operation unit side, and further cools the cooling air from the cooling fan flowing in the engine room. Provide a combine that can be discharged together from the pipe insertion port.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

That is, according to the first aspect of the present invention, the driving operation unit is provided on the body frame, the engine and the silencer are disposed in the engine room formed below the driving operation unit, and the exhaust gas is discharged from the silencer to the outside of the body. In the combine provided with a tail pipe extending rearward and upward, a radiator on one side in the left-right direction with respect to the engine and the silencer, and a cooling fan for sucking outside air for cooling the radiator and the engine,
A heat shield plate extending rearward and upward along the tail pipe from the engine room side is provided between the tail pipe and the operation unit.

  According to a second aspect of the present invention, a front wall and a rear wall are provided upright on both front and rear sides of the engine in the engine room, and a tail pipe is disposed between the upper end side of the rear wall and the lower end side of the heat shield plate. An insertion port is provided, and a predetermined gap is provided between the insertion port and the tail pipe.

  According to a third aspect of the present invention, the base end side of the tail pipe having an inner diameter larger than that of the outlet pipe extending in the horizontal direction from the discharge port of the silencer is externally connected with a predetermined gap therebetween. Thus, the axial direction of the tail end side of the tail pipe and the axial direction of the discharge port are arranged substantially parallel to the pulling direction of the belt wound around the pulley fixed to the output shaft of the engine.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, it is possible to prevent the exhaust discharged from the tail pipe from flowing toward the driving operation unit when the vehicle is moving backward. Further, the exhaust discharged from the tail pipe can be guided rearward.

  According to the second aspect of the present invention, the cooling air from the cooling fan flowing in the engine room can be discharged collectively from the insertion opening of the tail pipe. Moreover, the tail pipe is cooled by the cooling air discharged from the insertion port, so that the thermal influence on the surroundings can be reduced.

  According to the third aspect of the present invention, it is possible to stably secure the gap between the outside air introduction portions in the vibration direction of the engine, and to prevent interference between the tail pipe and the silencer. In addition, the external fitting direction and the vibration direction of the connection portion of the discharge port are parallel to each other, and it is possible to prevent the connection portion from contacting each other and generating noise.

  Next, embodiments of the present invention will be described with reference to the drawings.

  The combine 11 according to the present invention will be described with reference to the drawings. 1 is an overall side view of the combine 11, FIG. 2 is a front view of the combine 11, FIG. 3 is a plan view of the combine 11, FIG. 4 is a simplified side view of the exhaust device 41, FIG. 5 is a simplified front view of the exhaust device 41, 6 is a simplified plan view of the exhaust device 41, FIG. 7 is a simplified side view of a connecting portion between the longitudinal feed auger 22 and the lateral feed auger 23, FIG. 8 is a view taken along the arrow P of the guard plate 90 in FIG. 10 is a plan view of the guard plate 90, FIG. 11 is a cross-sectional view of the guard plate 90, FIG. 12 is a perspective view of the heat shield plate 50, FIG. 13 is a side cross-sectional view, and FIG. 15 is a side sectional view showing the portion 71, FIG. 15 is a simplified side view showing the periphery of the engine 34, and FIG. 16 is a simplified plan view.

  First, the overall configuration of the combine 11 will be described. As shown in FIGS. 1 to 3, the combine 11 is provided with a machine body (chassis) 13 on a crawler traveling device 12 that supports left and right crawlers, and an engine 34 on the front right side of the machine body 13. Is installed. A transmission case 31 for shifting the driving force of the engine 34 and transmitting it to the crawler traveling device 12 is disposed in front of the airframe 13. The transmission case axle is provided on the transmission case 31. Yes. Further, a cutting part 14 is provided at the front of the machine 13, and a sorting unit 16 is provided on the left side of the traveling direction in the upper part of the machine 13, and a threshing unit including a handling cylinder, a feed chain 15 a, and the like above the sorting unit 16. 15 is provided. A seat 19 and a cabin 18 which is a driving operation unit are provided at the right front part of the upper part of the airframe 13, and a glen tank 17 is provided at the right rear part of the airframe 13. A discharge conveyor 26 is disposed in the front-rear direction at the bottom of the Glen tank 17, and a discharge auger 21 is erected at the rear of the Glen tank 17. The grains stored in the grain tank 17 are conveyed rearward by a discharge conveyor 26, and discharged to a truck or the like from a discharge port 24 at the tip of the horizontal feed auger 23 via a vertical feed auger 22 and a horizontal feed auger 23 of the discharge auger 21. Is done. A guard member 81 that prevents interference between the tail pipe 61 and the discharge auger 21 is provided above the machine body 13. A guard plate 90 is attached to the lateral feed auger 23 of the discharge auger 21 at a location approaching the downstream end 63 of the tail pipe 61.

  As shown in FIG. 4, the engine 34 is mounted below the cabin 18 in front of the fuselage 13 of the combine 11, and the engine 34 is accommodated in an engine room 32. The engine room 32 includes an engine room cover that covers the upper surface, the front surface, and the left and right side surfaces. The front surface is an engine room front cover 37 serving as a front wall, and the rear surface is attached to the engine room rear frame 33 and serves as a rear wall. The rear cover 38 and the upper surface are constituted by a heat shield plate 50 described later. The engine room 32 has an opening (not shown) for taking in outside air for cooling on the right side, and the radiator 40, the radiator 40, and the engine are cooled in the vicinity of the opening as shown in FIG. A cooling fan 35 for sucking outside air is provided, and an intake path (not shown) in which an air cleaner, an intake silencer, and the like are provided is formed from the rear lower portion of the cabin 18 to the engine 34.

  Next, the exhaust device 41 will be described. As shown in FIG. 4, the exhaust device 41 is connected to an exhaust manifold 36 of the engine 34, and exhausts exhaust gas after combustion, thereby reducing exhaust sound accompanying explosion. The exhaust device 41 includes an exhaust silencer 42, a tail pipe 61, and an outside air introduction portion 71.

  The exhaust silencer 42 will be described. The exhaust silencer 42 is connected to the exhaust manifold 36 of the engine 34 to reduce exhaust noise. As shown in FIG. 4, the exhaust silencer 42 is a cylindrical body having a substantially elliptical cross section, and a silencer outlet pipe 43, which is an exhaust gas outlet, is provided near one side. The exhaust silencer 42 is disposed in the engine room 32 and is provided above the engine 34 at a position where the exhaust air from the cooling fan 35 hits. Since the exhaust silencer 42 is provided at a position where the exhaust air from the cooling fan 35 hits, the exhaust silencer 42 can be cooled and dust can be prevented from accumulating. Further, as shown in FIG. 5, the exhaust silencer 42 is disposed with its longitudinal direction facing the left-right direction of the fuselage 13 and offset to the left side of the fuselage 13 with respect to the exhaust manifold 36, and the silencer outlet pipe 43. Are connected to the left side in the direction of travel of the airframe 13.

Next, the tail pipe 61 will be described. The tail pipe 61 is connected to the downstream side of the exhaust silencer 42 and discharges exhaust gas from the engine 34. As shown in FIGS. 4 to 6, the overall shape of the tail pipe 61 extends from the upstream end portion 62, which is a portion that is externally connected to the silencer outlet pipe 43 of the exhaust silencer 42, toward the rear of the body 13. Yes. Further, an insertion port 60 for the tail pipe 61 is provided between the upper end 38 a side of the engine room rear cover 38 serving as the rear wall and the lower end side of the heat shield plate 50, and the insertion port 60, the tail pipe 61, It arrange | positions so that it may have a predetermined gap | interval between. Thus, the tail pipe 61 extends through the insertion opening 60, bends upward of the airframe 13 behind the through portion of the engine room rear frame 33, and extends toward the left side of the airframe 13. Next, when reaching the upper part of the threshing part 15 between the grain tank 17 and the threshing part 15, it bends in the horizontal direction again toward the rear of the machine 13 and extends backward, and this machine (the threshing part 15 or the Glen tank 17). ) A downstream end portion 63 of the tail pipe 61 is disposed near the front and rear center. The downstream end portion 63 bends at an angle β (FIG. 4) obliquely upward with respect to the horizontal plane in a side view, and has an angle α (see FIG. 6) obliquely left rearward (feed chain side) with respect to the front-rear direction in a plan view. ) It is bent. That is, the exhaust gas is piped so as to be exhausted from the downstream end 63 (exhaust port) to the upper left side of the machine body 13 and obliquely to the rear left side on the opposite side to the lateral feed auger 23.
Further, as shown in FIGS. 1 and 2, the tail pipe 61 is provided such that the upper end of the discharge port located at the highest position is lower than the lower end of the lateral feed auger 23.

  As shown in FIG. 4, the tail pipe 61 includes an outer tube 64 and an inner tube 65. The inner pipe 65 is a part that is externally connected to the silencer outlet pipe 43 of the exhaust silencer 42 and through which exhaust gas passes, and the outer pipe 64 is a part that forms a heat insulating layer between the inner pipe 65 and the inner pipe 65. The inner tube 65 and the outer tube 64 are each composed of a metal straight tube and an elbow, and the inner tube 65 is inserted into the outer tube 64. The inner tube 65 inserted into the outer tube 64 is fixed by fixing the inner tube fixing member to the outer surface of the inner tube 65 and the inner surface of the outer tube 64 by welding means or the like, and between the inner tube 65 and the outer tube 64. A predetermined gap is secured and fixed. A gap portion between the inner tube 65 and the outer tube 64 serves as a heat insulating layer. The gap communicates from the upstream end 62 to the downstream end 63 of the tail pipe 61. In this embodiment, the tail pipe 61 is a double pipe composed of the outer pipe 64 and the inner pipe 65, but it may be a single pipe consisting of only the inner pipe 65, or a pipe is provided on the outer side. Or more than triple tubes.

  The shape of the downstream end 63 of the tail pipe 61 is such that the end of the inner pipe 65 is positioned upstream of the end of the outer pipe 64, and the outer pipe is located at the downstream end 63 of the tail pipe 61. A difference is provided between the end positions of 64 and the inner pipe 65. Further, the end portion of the outer pipe 64 is obliquely cut and protruded so that the upper side becomes longer, so that rainwater or the like does not easily enter the tail pipe 61. Since there is a difference between the end positions of the outer pipe 64 and the inner pipe 65 at the downstream end 63 of the tail pipe 61, when the engine 34 is operated and exhaust gas is discharged from the downstream end of the inner pipe 65, A negative pressure is generated between the rear end of the inner tube 65 and the outer tube 64 due to the flow of the exhaust gas, and air is sucked from between the front end of the outer tube 64 and the front portion of the inner tube 65, A downstream air flow is generated in the gap with the outer tube 64. When the air flows, the inside of the gap is ventilated, the temperature rise of the air inside the gap is suppressed low, and the heat insulating effect between the inner pipe 65 and the outer pipe 64 is increased. For this reason, the rise in the surface temperature of the outer tube 64 can be suppressed to a low level, and even if a harness or the like is installed close to the tail pipe 61, the thermal influence on the harness or the like can be prevented. Further, it is possible to make it difficult for rainwater or the like to enter the tail pipe 61.

  The shape at the upstream end 62 of the tail pipe 61 on the engine room 32 side is such that the end 65 a of the inner pipe 65 protrudes upstream of the end of the outer pipe 64, and the upstream side of the tail pipe 61. In the end portion 62, a difference is provided between the end positions of the outer tube 64 and the inner tube 65. Since the gap between the inner pipe 65 and the outer pipe 64 communicates with the outside air at the upstream end 62 of the tail pipe 61, rainwater or the like has entered from the downstream end 63 of the tail pipe 61. Even in this case, water is discharged from the upstream end 62. Therefore, it is possible to prevent rainwater or the like from entering the exhaust silencer 42 or the engine 34 through the gap between the inner pipe 65 and the outer pipe 64.

  Here, as shown in FIGS. 3 and 6, the tail pipe 61 has an angle α (hereinafter, The downstream end portion 63 of the tail pipe 61 is located in the vicinity of the front, rear, left and right center of the machine. That is, the tail pipe 61 is discharged in the discharge direction α from the downstream end 63 near the center of the machine. Further, as shown in FIG. 5, the pipe is so shaped as to be discharged at an angle γ (hereinafter referred to as a discharge direction γ) that is higher than the height when the chamber cover 15 b is most opened. .

  Therefore, in order to discharge from the downstream end 63 in the vicinity of the center of the machine, as shown in FIG. 3, the dimension A up to the peripheral edge of the machine (here, the left rear corner of the machine) can be taken long and discharged. Since it is discharged in the direction α, the exhaust gas can be discharged far from the operator, and the influence of the exhaust gas on the operator (specifically, exhaust gas is sprayed or soot adheres) can be reduced. The influence of the exhaust gas on the discharge auger 21 and the grain tank 17 located on the right side can be reduced. Further, since the exhaust gas is discharged above the height when the handling chamber cover 15b is most opened, the handling chamber cover 15b is not exposed to the exhaust gas and can be prevented from being contaminated. The angle α in the discharge direction to the left side of the machine is preferably 30 degrees or less.

  Next, the heat shield plate 50 will be described. As shown in FIG. 12, the heat shield plate 50 includes an attachment portion 50 a and a wall portion, and the attachment portion 50 a is a substantially L-shaped plate material in plan view, and a rear portion of the cabin 18 serving as a driving operation portion. It is formed in a size that closes the space between the front of the Glen tank 17. The wall portion extends rearward and upward from the L-shaped notch of the mounting portion 50a, and has a shape that surrounds the left, right, and front sides by the right wall portion 50b, the left wall portion 50c, and the front wall portion 50d. The cross-sectional view is substantially “U” shape. The front wall portion 50d is inclined from the end of the front-rear direction middle portion of the attachment portion 50a toward the rear upper side, and has a substantially trapezoidal shape when viewed from the front. The right wall portion 50b is inclined from the end of the middle portion in the left-right direction of the mounting portion 50a toward the upper left, and has a substantially triangular shape in side view. The left wall portion 50c is integrally connected to the left end portion of the front wall portion 50d and arranged substantially vertically, and has a substantially triangular shape in side view. The right wall portion 50b, the front wall portion 50d, and the left wall portion 50c are arranged near the middle portion of the tail pipe 61, and are attached with a predetermined gap between the three wall portions and the tail pipe 61. The portion 50a is fixed to the rear portion of the cabin 18 via a support stay or the like. Further, the upper end portion of the heat shield plate 50 is lower than the downstream end portion 63 of the tail pipe 61.

  By attaching in this way, as shown in FIG. 13, the heat shield plate 50 is attached to the tail pipe 61 while ensuring a predetermined gap. For this reason, exhaust air that has been leaked from the front and rear of the engine room 32 in the past is used as a wall to prevent the exhaust air from leaking to the front and rear sides of the engine room 32 as described above. The cover 38 is provided, and the gap between the upper surface of the engine room 32 and the space between the rear portion of the cabin 18 and the front portion of the glen tank 17 are closed by the mounting portion 50a of the heat shield plate 50, so Therefore, it is possible to collect and discharge in the direction along the tail pipe 61, and the cooling effect of the tail pipe 61 is improved. Moreover, by collecting exhausted air to be exhausted, the wind speed is increased, the momentum to the rear increases, and the hot air is less likely to hit the operator (air curtain effect). In particular, when the vehicle is moving backward, the exhaust gas flowing in the direction of the cabin 18 can be blocked by the air curtain effect. In this embodiment, the right pipe 50b, the front wall 50d, and the left wall 50c, which are the walls of the heat shield plate 50, are shaped so as to surround the tail pipe 61 from the left, right, and front three sides. For example, a semi-cylindrical wall may be used as long as a predetermined gap can be secured between the tail pipe 61 and the wall of the heat shield 50.

  Next, the outside air introduction part 71 will be described. The outside air introduction unit 71 introduces outside air into the inner pipe 65 of the tail pipe 61 and reduces the temperature of the exhaust gas by outside air. As shown in FIG. 14, an end 65 a of the inner pipe 65 protrudes from the upstream end 62 of the tail pipe 61 by a predetermined width, and the inner diameter of the end 65 a of the inner pipe 65 is the outer diameter of the silencer outlet pipe 43. The end portion 65 a of the inner pipe 65 is externally connected to the silencer outlet pipe 43 of the exhaust silencer 42, and the outside air introduction portion 71 is formed at a connection portion between the exhaust silencer 42 and the tail pipe 61. Has been. As shown in FIG. 14, the connecting portion between the inner pipe 65 and the silencer outlet pipe 43 includes a lap allowance C having a predetermined width that becomes an overlapping portion between the inner pipe 65 and the silencer outlet pipe 43, and the inner pipe 65 and the silencer outlet pipe. There is a gap D of a predetermined width between Thus, when the exhaust gas passes through the inner pipe 65 during operation of the engine 34, negative pressure is generated in the outside air introduction portion 71, that is, the portion occupied by the lap allowance C and the gap D (E portion in FIG. 14) due to the exhaust gas flow. The outside air is sucked into the inner tube 65 from the opening of the outside air introduction portion 71.

  As shown in FIG. 6, the outside air introduction portion 71 is provided in the engine room 32 close to the exhaust silencer 42 and is provided at a position where exhaust air from the cooling fan 35 is hit. Since the exhaust air from the cooling fan 35 always hits the outside air introduction unit 71, it is possible to introduce low-temperature air from the outside air introduction unit 71 and to prevent dust from collecting in the outside air introduction unit 71.

  As shown in FIGS. 15 and 16, an output shaft 34a projects from one side of the engine 34, and an output pulley 39 is fixed to the output shaft 34a. The output pulley 39 is connected to the mission case 31 disposed in front of the machine body 13 to transmit power to the reaping device or the traveling system, or to the transmission case to transmit power to the threshing device, sorting device, or grain discharging device. Belts 44 and 45 are wound substantially horizontally in the front-rear direction in order to transmit power to a counter case (not shown) disposed behind. Further, the axial direction of the end portion 65a of the inner pipe 65 that is the base end side of the tail pipe 61 and the axial direction of the silencer outlet pipe 43 that is the discharge port of the exhaust silencer 42 are substantially the same as the pulling direction of the belts 44 and 45. They are arranged in parallel.

  That is, as shown in FIGS. 6 and 15, the direction in which the tail pipe 61 and the silencer outlet pipe 43 are connected is the front-rear direction of the airframe 13. The vibration direction of the engine 34 is affected by the pulling force of the belts 44 and 45 in FIG. 15 and is substantially parallel to the pulling direction. Therefore, the silencer outlet pipe 43 is placed in the inner pipe 65 in a direction along the pulling direction of the belt. Are inserted with a predetermined gap therebetween. With this configuration, the vibration of the silencer outlet pipe 43 due to the vibration of the engine 34 coincides with the insertion direction, so that it is difficult to contact the inner pipe 65 of the tail pipe 61. Since the interference between the silencer outlet pipe 43 and the tail pipe 61 can be prevented in this way, it is preferable that the insertion direction of the silencer outlet pipe 43 is substantially parallel to the pulling direction of the belts 44 and 45 where the vibration of the engine 34 is large. is there.

  Further, since the outside air introduction part 71 is configured such that the silencer outlet pipe 43 provided in the exhaust silencer 42 is inserted into the tail pipe 61, and a gap is secured between the silencer outlet pipe 43 and the tail pipe 61. A flange for connecting the exhaust silencer 42 and the tail pipe 61 becomes unnecessary. Since the mass of the exhaust silencer 42 that is a vibrating body can be reduced by eliminating the need for a flange, and the vibration of the exhaust silencer 42 can be reduced, noise due to vibration can be reduced.

Next, support of the exhaust device 41 will be described. As shown in FIGS. 4 to 6, the tail pipe 61 is supported by the threshing portion 15 via support members 82 and 83. As described above, when the exhaust device 41 is piped and supported above the fuselage 13, soot and the like are hardly accumulated in the exhaust device 41. Moreover, in the support part in the threshing part 15 of the tail pipe 61, the space | interval of the tail pipe 61 and the threshing part 15 is ensured enough, and even if a harness, an oiling hose, etc. are arrange | positioned under the tail pipe 61, it is due to heat. I try to prevent the impact.
The support member 82 supports a vertical portion 61 a extending in the vertical direction of the tail pipe 61. On the other hand, the support member 83 supports a lateral portion 61 b extending in the horizontal direction of the tail pipe 61. By supporting in multiple places, it will be supported by the threshing part 15 more firmly. In the present embodiment, the support member supports the two places, but the structure may be supported at three or more places.

  Next, the discharge auger 21 will be described. As shown in FIG. 1, the discharge auger 21 has a longitudinal feed auger 22 and a lateral feed auger 23. As shown in FIG. 7, the base side of the lateral feed auger 23 is connected to the upper part of the vertical feed auger 22 so as to be rotatable in the vertical direction. A bracket 55 projects from the side of the vertical feed auger 22, and a bracket 56 projects from the side of the lateral feed auger 23. One end of a cylinder 51 as a vertical driving means is rotatably attached to the bracket 55, and the other end of the cylinder 51 is rotatably attached to the bracket 56. Due to the expansion and contraction of the cylinder 51, the discharge auger 21 is lifted up and down. Further, the transverse feed auger 23 is provided with a rotary potentiometer 53 as a vertical angle detection means, and the rotary potentiometer 53 detects the vertical angle of the discharge auger 21.

  As shown in FIG. 7, a spur gear 57 is fitted and fixed to the middle part of the longitudinal feed auger 22. An actuator 52 serving as a horizontal direction driving unit is provided on the machine body 13 side, and a spur gear 58 is provided on the rotation shaft of the actuator 52. The spur gear 57 and the spur gear 58 are engaged with each other, and when the actuator 52 is operated, the longitudinal feed auger 22 and the lateral feed auger 23 are integrally rotated in the horizontal direction. A rotary potentiometer 54 as a horizontal angle detecting means is provided coaxially with the spur gear 58. The horizontal angle of the discharge auger 21 is detected by the rotary potentiometer 54. The vertical angle detecting means and the horizontal angle detecting means can use rotational angle detecting means such as a resolver and a rotary encoder in addition to a rotary potentiometer.

  Next, the guard member 81 will be described. As shown in FIGS. 1 to 6 and 8, a guard member 81 is provided above the fuselage 13 of the combine 11. The guard member 81 is a member that prevents interference between the tail pipe 61 and the discharge auger 21 without the discharge auger 21 coming into contact with the tail pipe 61 when the discharge auger 21 approaches the tail pipe 61. As for the mounting position and shape of the guard member 81, the vertical and horizontal angles of the discharge auger 21 corresponding to the position where there is a possibility of interference with the tail pipe 61 are obtained. Before entering, the lateral feed auger 23 is in a position and a shape where it abuts against the guard member 81 before the tail pipe 61.

  Specifically, the guard member 81 is configured by bending a metal pipe, a rod-like member, or a strip plate-like member into a substantially inverted U shape. As shown in FIG. 4, one end of the pipe is at a position below the rear end of the tail pipe 61, and as shown in FIG. 6, at a position away from the rear end of the tail pipe 61 by a predetermined length so that exhaust is not directly applied. The frame is fixed to a frame between the grain tank 17 and the threshing portion 15 and extends vertically from the frame toward the upper side of the machine body 13. Then, as shown in FIG. 5, the lateral guard member 81 a is bent from a position substantially the same height as the rear end of the tail pipe 61 and bent toward the left rear side of the machine body 13. Forming. Next, when the rear part of the horizontal guard member 81a reaches substantially the same height as the upper end of the Glen tank 17, it bends downward and extends in the vertical direction to form a vertical guard member 81b. If the vertical guard member 81b is extended downward as it is, it hits the threshing portion 15. Therefore, the vertical guard member 81b is bent into a substantially crank shape in a front view and is extended downward as a substantially straight shape in a plan view. The lower end is fixed to the provided mounting base.

  Thus, the guard member 81 is disposed on the right rear side of the exhaust device 41, and the lateral guard member 81a is disposed at a position higher than the upper end of the downstream end portion 63 of the tail pipe 61. Here, as shown in FIGS. 4 and 8, the tail pipe 61 has a shape that is piped so as to be discharged upward at an angle β (hereinafter referred to as a discharge direction β) with respect to the horizontal direction of the machine body. The guard member 81 is disposed in parallel with the discharge direction β of the tail pipe 61. Specifically, the longitudinal axis direction of the lateral guard member 81a of the guard member 81 and the discharge direction β of the tail pipe 61 are arranged in parallel. Further, a portion corresponding to the length of the lateral guard member 81a is separated from the downstream end 63 of the tail pipe 61 to the guard member 81 (vertical guard member 81b) in the discharge direction β.

  Therefore, as shown in FIG. 8, the exhaust gas is discharged from the downstream end 63 of the tail pipe 61 in the discharge direction β, but this exhaust gas does not directly reach the guard member 81. On the other hand, when the lateral auger 23 of the discharge auger 21 is rotated, the lateral auger 23 is brought closest to the guard member 81, that is, the lateral auger 23 is moved to the auger storage position (the solid line shown in FIG. 8). ) To the upper left along the horizontal guard member 81a, the horizontal feed auger 23 moves in parallel with the discharge direction β, and even if it is the closest contact position between the horizontal guard member 81a and the vertical guard member 81b. The lateral feed auger 23 is at a position separated by a dimension B or more. (The two-dot chain line shown in FIG. 8).

  Moreover, the guard member 81 is arrange | positioned in parallel with the discharge direction (alpha) of the tail pipe 61, as shown in FIG. That is, as described above, the guard member 81 has a shape that is substantially one letter in plan view, and the guard member 81 is disposed in parallel with the discharge direction α of the tail pipe 61 in plan view. For this reason, the guard member 81 can be arrange | positioned compactly on the body 13, and the space on the body 13 can be used effectively.

  Next, the guard plate 90 will be described. As shown in FIGS. 8 and 11, the guard plate 90 has a shape in which a rectangular metal plate is bent and a cross-sectional shape is formed in a substantially C shape so as to cover a substantially lower half surface of the lateral feed auger 23. is there. The guard plate 90 may be configured in a cylindrical shape so as to cover the entire outer periphery of the lateral feed auger 23. The guard plate 90 is coated with black heat-resistant coating so that dirt on the surface of the guard plate 90 is not noticeable even if soot contained in the exhaust gas adheres to the guard plate 90. Note that not only the guard plate 90 but also the entire outer surface of the lateral feed auger 23, or the color in the vicinity of the downstream end 63 of the tail pipe 61 when the lateral feed auger 23 is housed is black or a color close to a heel. Thus, the dirt on the surface of the guard plate 90 can be made less noticeable.

  The guard plate 90 is attached to the lateral feed auger 23 of the discharge auger 21. Specifically, the guard plate 90 is a location near the downstream end 63 of the tail pipe 61 of the lateral feed auger 23 at the position where the lateral feed auger 23 is housed (above the downstream end 63). The guard plate 90 is positioned between the lateral feed auger 23 and the guard member 81 so that the bottom surface of the guard plate 90 faces the downstream end 63 of the tail pipe 61. The shape of the guard plate 90 is not limited to the present embodiment, and it is sufficient if the vicinity of the downstream end 63 of the tail pipe 61 can be covered.

  Here, as shown in FIG. 11, a plurality of (six in this embodiment) high nuts (or six in this embodiment) are provided at the mounting positions of the guard plate 90 of the lateral feed auger 23 at a predetermined angle (approximately 90 degrees) in the radial direction. Bolts) 91, 91... Are fixed by welding or the like. Similarly, bolt holes are opened at positions facing the high nuts 91, 91... Of the guard plate 90. That is, six high nuts 91, 91,... Are fixed to the lateral feed auger 23 by welding or the like at positions facing the front end portion and the rear end portion of the guard plate 90. On the other hand, bolt holes are formed in the guard plate 90 at positions corresponding to the high nuts 91, 91,. The bolt holes of the guard plate 90 and the high nuts 91, 91,... Of the lateral feed auger 23 are aligned with each other, and the bolts 92, 92,. It is done. The method of attaching the guard plate 90 is not limited to the present embodiment, and it is sufficient that the guard plate 90 can be fixed to the lateral feed auger 23.

  By attaching in this way, as shown in FIG. 11, the guard plate 90 is attached to the outer peripheral surface of the lateral feed auger 23 while being separated by the length of the high nut 91. A gap 93 is formed between the two. For this reason, a gap 93 is formed between the guard plate 90 and the lateral feed auger 23 and can be insulated from both, and heat conduction from the guard plate 90 to the lateral feed auger 23 is reduced. A heat insulating material is interposed between the guard plate 90 and the outer peripheral surface of the lateral feed auger 23, or a heat insulating material that also serves as a heat-resistant buffer member is directly attached to the outer peripheral surface of the lateral feed auger 23. It may be a configuration.

  8 and 10, the lateral feed auger 23 of the discharge auger 21 may approach the guard member 81 depending on the operation. In other words, the lateral feed auger 23 can approach the upper side of the horizontal guard member 81a and the side of the vertical guard member 81b. Here, from the downstream end 63 of the tail pipe 61, as shown in FIGS. When the exhaust gas is discharged in the direction of the arrow, it is possible to prevent the exhaust gas from being blocked by the guard plate 90 and being applied to the lateral feed auger 23 of the discharge auger 21. Further, since the guard plate 90 is mounted so as to be positioned between the lateral feed auger 23 and the guard member 81, the guard plate 90 hits the guard member 81, and the lateral feed auger 23 of the discharge auger 21 is deformed. Is prevented.

As described above, the combine 11 according to the present embodiment includes the cabin 18 as the operation unit on the body frame 13, and the engine 34 and the exhaust silencer 42 are arranged in the engine room 32 formed below the cabin 18. And a tail pipe 61 that discharges exhaust gas from the exhaust silencer 42 to the outside of the airframe is extended rearward and upward. The radiator 40 is disposed on one side in the left-right direction with respect to the engine 34 and the exhaust silencer 42, In the combine 11 provided with the cooling fan 35 for sucking outside air for cooling the engine 34,
Between the tail pipe 61 and the cabin 18, a heat shield plate 50 extending rearward and upward along the tail pipe 61 from the engine room 32 side is provided. By configuring in this way, it is possible to prevent the exhaust discharged from the tail pipe 61 from flowing toward the driving operation unit when the aircraft is moving backward. Further, the exhaust discharged from the tail pipe 61 can be guided rearward.

  Further, an engine room front cover 37 as a front wall and an engine room rear cover 38 as a rear wall are provided upright on both the front and rear sides of the engine 34 in the engine room 32, and the upper end of the engine room rear cover 38 is erected. An insertion port 60 for the tail pipe 61 is provided between the side 38 a and the lower end side of the heat shield plate 50, and a predetermined gap is provided between the insertion port 60 and the tail pipe 61. With this configuration, the cooling air from the cooling fan 35 flowing in the engine room 32 can be discharged collectively from the insertion port 60 of the tail pipe 61. Further, the tail pipe 61 is cooled by the cooling air discharged from the insertion port 60, so that the thermal influence on the surroundings can be reduced.

  Further, an end portion 65a of the inner tube 65, which is the base end side of the tail pipe 61 having an inner diameter larger than this, is provided on the distal end side of the silencer outlet tube 43 extending in the horizontal direction from the discharge port of the exhaust silencer 42. The outer pipe is connected with a predetermined gap therebetween, and the axial direction of the end 65a of the inner pipe 65 of the tail pipe 61 and the axial direction of the silencer outlet pipe 43 are fixed to the output shaft 34a of the engine 34. The belts 44 and 45 wound around the output pulley 39 are arranged substantially parallel to the pulling direction. With this configuration, it is possible to stably ensure the gap between the outside air introduction portions 71 in the vibration direction of the engine 34, and to prevent interference between the tail pipe 61 and the exhaust silencer 42. In addition, the external fitting direction and the vibration direction of the connection portion of the discharge port are parallel to each other, and it is possible to prevent the connection portion from contacting each other and generating noise.

The whole side view of the combine 11. FIG. The front view of the combine 11. FIG. The top view of the combine 11. FIG. FIG. 6 is a simplified side view of the exhaust device 41. The front simplified view of the exhaust device 41. FIG. FIG. 3 is a simplified plan view of the exhaust device 41. The side surface simplification figure of the connection part of the vertical feed auger 22 and the horizontal feed auger 23. FIG. The arrow P figure of the guard board 90 in FIG. The side view of the guard board 90. FIG. The top view of the guard board 90. FIG. Sectional drawing of the guard board 90. FIG. The perspective view of the heat shield 50. FIG. Similarly side sectional drawing. Side surface sectional drawing which shows the external air introduction part 71. FIG. The side surface simplification figure which shows the engine 34 periphery part. Similarly, a plan view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Combine 13 Airframe 18 Cabin 32 Engine room 34 Engine 34a Output shaft 35 Cooling fan 37 Engine room front cover 38 Engine room rear cover 38a Upper end 39 Output pulley 40 Radiator 42 Exhaust silencer 43 Silencer outlet pipe 44/45 Belt 50 Heat shield plate 60 Insertion port 61 Tail pipe 65 Inner pipe

Claims (3)

A driving control unit is provided on the fuselage frame, and the engine and silencer are arranged in the engine room formed below the driving control unit, and a tail pipe that discharges exhaust from the silencer to the outside of the fuselage extends backward and upward. And a combiner provided with a radiator on one side in the left-right direction with respect to the engine and the silencer, and a cooling fan for sucking outside air for cooling the radiator and the engine,
A combine comprising a heat shield extending rearward and upward along the tailpipe from the engine room side between the tailpipe and the operation unit.   A front wall and a rear wall are erected on the front and rear sides of the engine in the engine room, respectively, and a tail pipe insertion port is provided between the upper end side of the rear wall and the lower end side of the heat shield plate, The combine according to claim 1, wherein a predetermined gap is provided between the insertion opening and the tail pipe.   The base end side of the tail pipe having an inner diameter larger than that of the outlet pipe extending in the horizontal direction from the discharge port of the silencer is externally connected with a predetermined gap therebetween. 2. The axial direction of the base end side and the axial direction of the discharge port are arranged substantially parallel to a pulling direction of a belt wound around a pulley fixed to the output shaft of the engine. Combine.

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