JP2012147735A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a combine harvester capable of avoiding the local temperature elevation of an exhaust pipe line while suppressing the generation of soil dust caused by exhaust, although installing an exhaust muffler at the upper part of an engine and exhausting engine exhaust gas in the rear lower direction of a traveling machine body.SOLUTION: This combine harvester is provided by installing an exhaust pipe 43 guiding and exhausting the flow of exhaust gas from the exhaust muffler 41 toward the rear lower direction of the traveling machine body linearly by making it pass through between a threshing device and a grain recovery part from an exhaust port 42a of the exhaust muffler 41, and also including a guiding surface 44a having a crossing angle to the axial core 43d of the exhaust pipe 43 and arranging a flow guide 44 guiding the exhaust gas of the exhaust pipe 43 so as to flow toward the rear direction of the traveling machine body by the guiding surface 44a, at the lower side of the exhaust port 43a of the exhaust pipe 43.

Description

  The present invention relates to a driving unit provided at a front portion of a traveling machine body, an engine provided below the driving part, a threshing device and a grain recovery provided side by side in the lateral direction of the traveling machine body behind the driving unit. It is related with the combine provided with the part.

  Conventionally, for example, there is a combine disclosed in Patent Document 1. In the one described in Patent Document 1, one end side of a tail pipe is connected to an exhaust port of an engine via a muffler as an exhaust muffler and an exhaust pipe descending from the muffler. The engine exhaust device is configured to perform engine exhaust toward the center rear side of the chassis along the lower side of the center frame extending over the center.

JP-A-10-276533

  By adopting the conventional technology, when the exhaust of the engine is configured to be discharged to the lower rear part of the traveling machine body, the elbow part (bent part) is located in the exhaust pipe line extending from the exhaust port of the exhaust muffler to the lower rear part of the traveling machine body. As a result, local temperature rise due to engine exhaust is likely to occur in the elbow part.

  An object of the present invention is to provide an exhaust muffler at the upper part of the engine and exhaust the engine exhaust to the lower rear part of the traveling machine body, while suppressing the generation of dirt dust due to the exhaust while increasing the local temperature of the exhaust pipe It is in providing the combine which can avoid.

The first aspect of the present invention is a driving unit provided at a front portion of a traveling machine body, an engine provided below the driving unit, and a threshing device and a grain provided side by side in a lateral direction of the traveling machine body behind the driving unit. In a combine equipped with a grain recovery unit,
An exhaust muffler for the engine is provided at the top of the engine,
An exhaust pipe that guides and exhausts the exhaust from the exhaust muffler is provided in a straight line from the exhaust port of the exhaust muffler through the gap between the threshing device and the grain recovery unit toward the lower rear of the traveling machine body. ,
A flow guide that includes a guide surface having an angle intersecting the axis of the exhaust pipe and guides the exhaust pipe exhaust so as to flow toward the rear of the traveling machine body by the guide surface. It is arranged on the lower side.

  According to the configuration of the first aspect of the present invention, the engine exhaust discharged from the exhaust muffler is flow-guided and discharged to the lower rear part of the traveling machine body by the exhaust pipe. Since the exhaust pipe is provided in a straight line, there is no occurrence of a situation in which the flowing engine exhaust locally accumulates or the flow velocity decreases and the exhaust pipe is heated.

  If the engine exhaust is merely guided by a straight exhaust pipe from the exhaust port of the exhaust muffler provided at the top of the engine to the rear lower part of the traveling machine body, the engine exhaust discharged from the exhaust pipe is exhaust pipe It is easy to be discharged on the ground by being discharged in the direction along the axis of the. According to the configuration of the first aspect of the invention, the flow guide includes a guide surface having an angle intersecting the axis of the exhaust pipe, and guides the exhaust pipe to flow toward the rear of the traveling machine body by the guide surface. Since the exhaust pipe is disposed below the discharge port of the exhaust pipe, the engine exhaust discharged from the exhaust pipe can be caused to flow toward the rear of the traveling machine body, and blowing of the engine exhaust to the ground by the exhaust pipe can be suppressed.

  Therefore, while the exhaust muffler is provided at the upper part of the engine and the engine exhaust is discharged to the lower rear part of the traveling machine body, the exhaust pipe is not locally heated so that the peripheral device does not rise in temperature due to overheating of the exhaust pipe. Temperature rise can be prevented, and generation of dirt due to exhaust of engine exhaust from the exhaust pipe can be suppressed.

  In the second aspect of the invention, the flow guide is attached to the exhaust pipe.

  According to the configuration of the second invention, a compact structure in which the flow guide and the exhaust pipe are integrated can be achieved.

  Therefore, even when a large space cannot be secured below the rear part of the traveling machine body, the exhaust pipe and the flow guide can be provided in a compact manner, and the exhaust can be performed while suppressing the generation of dirt dust.

  In the third aspect of the present invention, a direction changing guide for changing the flow direction of the exhaust gas from the flow guide to the downward direction of the traveling machine body is provided behind the exhaust pipe.

  According to the configuration of the third aspect of the present invention, the flow guide acts toward the engine exhaust that flows backward from the exhaust pipe and the flow force decreases, and even when the direction change guide is applied, it is hard to hit the ground. By making the change guide act, the engine exhaust can be made to flow downward and hardly diffuse upward.

  Therefore, it is possible not only to suppress the generation of dirt due to the engine exhaust, but also to suppress the upward diffusion of the engine exhaust.

  According to the fourth aspect of the present invention, the upper end of the orientation change guide is positioned at an arrangement height higher than the upper end of the exhaust port of the exhaust pipe, and the lower end of the orientation change guide is lower than the lower end of the exhaust port of the exhaust pipe. It is located at the height.

  According to the configuration of the fourth aspect of the present invention, the direction change guide can overlap the entire exhaust pipe exhaust port in the rear view of the traveling machine body. For example, when the vehicle is moved backward in a wet field, the direction change guide is directed toward the exhaust pipe exhaust port. The moving mud can be received behind the exhaust pipe by the direction change guide, so that the mud can hardly enter the exhaust port of the exhaust pipe.

  Therefore, the direction change guide can be used as the earth retaining means, and the structure can easily prevent clogging of the exhaust pipe.

It is a right view which shows the whole combine. It is a left view which shows the whole combine. It is a top view which shows the whole combine. It is a top view which shows the arrangement | positioning relationship on a body frame and a body frame. It is a side view which shows an exhaust apparatus. It is a rear view which shows an exhaust apparatus and a grain collection | recovery part. It is a top view which shows the discharge port of an exhaust pipe. It is a vertical side view which shows the discharge port of an exhaust pipe. It is a perspective view which shows the discharge port of an exhaust pipe. It is a perspective view which shows the whole direction change guide. It is a vertical side view which shows the direction change guide in an attachment state. It is a rear view which shows the direction change guide in an attachment state. It is a side view which shows a grain collection | recovery part. It is a front view which shows the support structure of the front support structure of a tank, and the back support body of the front side. It is a side view which shows the support structure of the front support structure of a tank, and the back support body of the front side. It is a top view which shows the support structure of the front support structure of a tank, and the back support body of the front side. It is a rear view which shows the rear support structure of a tank. It is a side view which shows the back support structure of a tank. It is a top view which shows the back support structure of a tank. It is a front view which shows the back support body of the front side switched to the downward use attitude | position. It is a side view which shows the grain collection | recovery part in the state to which the back support body of the back side was attached. It is a rear view which shows the attachment structure of a back support body of a rear side. It is a top view in the decomposition | disassembly state of the attachment structure of a back support body of a back side. FIG. 23 is a sectional view taken along the line XXIV-XXIV in FIG. 22.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a right side view showing the entire combine according to the embodiment of the present invention. FIG. 2 is a left side view showing the entire combine according to the embodiment of the present invention. FIG. 3 is a plan view showing the entire combine according to the embodiment of the present invention. As shown in these drawings, the combine according to the embodiment of the present invention is provided on the machine body frame 2 equipped with a pair of left and right crawler travel devices 1 and 1 and on the lateral end side of the front end portion of the machine frame 2. A traveling machine body including the driving unit 3, a cutting unit 4 connected to a portion of the body frame 2 located on the side of the driving unit 3, and a rear side of the driving unit 3 are arranged in the lateral direction of the traveling machine body. The threshing device 5 and the grain recovery unit 6 are provided.

  The traveling machine body includes a driving unit 10 equipped with an engine 11 provided below a portion where the driver's seat 3a of the driving unit 3 is located, and a driving force output from the engine 11 is provided at a front end portion of the machine frame 2. Is transmitted to a crawler driving wheel body 1a of a pair of left and right crawler traveling devices 1 and 1 from a traveling mission (not shown) located inside the mission case 7 and input to the transmitted mission case 7, and a pair of left and right crawler traveling The devices 1 and 1 are driven. The traveling machine body transmits the driving force from the engine 11 to a driving mechanism (not shown) of the cutting unit 4 from a work mission (not shown) located inside the mission case 7 to drive the cutting unit 4. .

  The mowing unit 4 includes a mowing unit frame 4 a that is swingable up and down from the front end of the machine body frame 2, and the mowing unit frame 4 a is swung up and down by a hydraulic cylinder 8, whereby the mowing unit 4 The lifting operation is performed in a descending working state in which the weeding tools 4b provided side by side in the lateral direction of the traveling machine body are lowered near the ground and in an ascending non-working state in which the weeding tools 4b are elevated from the ground.

Therefore, the combine performs harvesting work such as rice and wheat by running the traveling machine with the cutting unit 4 in the descending work state.
That is, when the traveling machine body is caused to travel with the mowing unit 4 in the descending work state, the mowing unit 4 among the plurality of pulling devices 4c that line up the planted cereals to be trimmed in the lateral direction of the traveling machine body by the weeding tool 4b. The planted culm introduced into the predetermined pulling device 4c and processed by the pulling device 4c is cut by the clipper-shaped cutting device 4d, and the cutting mash is fed by the supply device 4e. It conveys back and supplies to the threshing feed chain 5a of the threshing apparatus 5. The threshing device 5 clamps and conveys the stock side of the harvested cereal rice cake in the rear direction of the traveling machine body by the threshing feed chain 5a, supplies the tip side of the harvested cereal rice cake to the handling room (not shown), and performs the threshing treatment. The grains are supplied to the tank 20 provided in the grain collection unit 6 by the cerealing device 9.

[Configuration of Airframe Frame]
As shown in FIGS. 4 and 5, the body frame 2 passes through a pair of left and right main frames 30, 30 in the form of square pipes that are long in the front-rear direction of the traveling body, and the pair of main frames 30, 30 in the left-right direction. A plurality of horizontal frames 31 connected to the main frame 30 and front and rear side frames 32 connected to the outer end of the horizontal frame 31 are formed and formed in a lattice frame shape.

  As shown in FIG. 4, the threshing device 5 is mounted on the left rear portion of the body frame 2, the grain collection unit 6 is mounted on the right rear portion of the body frame 2, and the driving unit 10 is provided on the right front portion of the body frame 2. ing.

[Composition of the motor section]
As shown in FIGS. 4 and 5, the prime mover 10 includes an engine 11 mounted at a predetermined position of a pair of lateral frames 31, 31 located adjacent to the right front portion of the body frame 1, and the right lateral side of the engine 11. An engine cooling radiator 12 provided on the side, and a rotary cooling fan 13 provided between the radiator 12 and the engine 11 are provided.

  The rotary cooling fan 13 is rotationally driven by the engine 11 to suck air that is located outside the prime mover 10 to generate cooling air, and supplies the generated cooling air to the radiator 12.

  The engine 11 is mounted in a posture in which the output shaft is oriented sideways on the traveling machine body. A cushion rubber 16 is interposed between the engine mount 14 formed on the lateral frame 31 and the connecting portion 15 formed on the engine 11. A fuel tank 17 having a cylindrical fuel filler port 17 a is disposed at the left rear end of the machine body frame 2, and fuel is supplied from the fuel tank 17 to the engine 11. A hydraulic oil tank 18 is mounted on the left front portion of the machine body frame 2.

[Configuration of engine exhaust system]
An exhaust device 40 including an exhaust muffler 41 is connected to the engine 11.
As shown in FIGS. 4, 5, and 6, the exhaust device 40 travels from an exhaust muffler 41 provided at the upper part of the engine 11 in the center in the lateral direction of the traveling machine body, and an exhaust port 42 a of the exhaust muffler 41. An exhaust pipe 43 extending downward at the rear of the airframe, a flow guide 44 provided below the exhaust port 43a located on the rear end side of the exhaust pipe 43, and a location located behind the exhaust port 43a of the exhaust pipe 43 In this case, the direction change guide 45 is provided at a location located in front of the fuel tank 17.

  The exhaust muffler 41 includes a circular muffler body 41a that is long in the longitudinal direction of the traveling machine body, in which an exhaust inlet (not shown) is connected to the exhaust manifold 11a of the engine 11, and extends rearward from the rear wall of the muffler body 41a. And a discharge cylinder 42 which is discharged and forms a discharge port 42a.

  The exhaust pipe 43 is a threshing device 5 in a state in which the shaft core 43d is formed in a linear shape from the front end portion 43b surrounding the exhaust port 42a of the exhaust muffler 41 to the rear end portion 43c where the discharge port 43a is located. Between the horizontal machine wall portion located on the inner side in the horizontal direction of the traveling machine body and the bag support part 21 located below the tank 20 of the grain collecting part 6 in the longitudinal direction of the traveling machine body, the disposition height that is lower toward the discharge port side It is arranged so as to pass in an inclined posture located at the top. The exhaust pipe 43 is provided with connecting portions 43e that are arranged in three locations in the direction along the axis 43d, and is supported by the support portions 46 and stays 47 provided on the body frame 2 by the connecting portions 43e.

  The front end 43 b of the exhaust pipe 43 is connected to the exhaust cylinder 42 of the exhaust muffler 41 in a state where an ejector passage 48 is formed between the exhaust pipe 43 and the exhaust cylinder 42 of the exhaust muffler 41.

  The discharge port 43 a of the exhaust pipe 43 is connected to the conveyance start end of the cerealing device 50 provided between the threshing device 5 and the grain collection unit 6, at the conveyance end of the first screw conveyor 9 provided in the threshing device 5. The rear lower part of the traveling machine body located below the connection case 51 provided between the screw conveyor 9 and the cerealing device 5 so as to communicate with each other and between the pair of left and right crawler traveling devices 1, 1. It is arranged in.

  FIG. 7 is a plan view showing the discharge port 43 a of the exhaust pipe 43. FIG. 8 is a longitudinal side view showing the discharge port 43 a of the exhaust pipe 43. FIG. 9 is a perspective view showing the exhaust port 43 a of the exhaust pipe 43. As shown in these drawings, the exhaust port 43a of the exhaust pipe 43 is formed by cutting away the upper and lower portions of the rear end 43c of the exhaust pipe 43 in the front-rear direction so that a pair of left and right extending portions 43g and 43g remain. In addition, a part of the opening formed by excising the lower part is formed by being closed by a flow guide 44 disposed below the discharge port 43c and attached to the exhaust pipe 43. Open in the direction. That is, the exhaust port 43a of the exhaust pipe 43 is formed and positioned on the upper side of the pair of left and right extending portions 43g and 43g so that the shape in plan view is U-shaped and inclined downward with respect to the horizontal line in side view. The upper opening and the bottom of the pair of left and right extending portions 43g, 43g are rectangular in plan view, and are formed and positioned so as to have a slightly lower downward slope with respect to the horizontal line than the upper opening in a side view. And a side opening. The upper opening formed by cutting the upper part of the exhaust pipe 43 compensates for the lack of opening caused by closing a part of the opening formed by cutting the lower part of the exhaust pipe 43 with the flow guide 44. Each of the extended end portions (rear end portions) of the pair of left and right extended portions 43g, 43g has a shape in which the outer edge of the extended end portion is inclined inward so as to be slightly tapered.

  The flow guide 44 is provided with a guide surface 44 a having an angle intersecting the axis 43 d of the exhaust pipe 43. The flow guide 44 is in a downwardly inclined posture with respect to the horizon in a side view, and exhibits a function of pushing the mud down below the discharge port 43a during advance. The direction change guide 45 includes an inclined guide surface 45a that is inclined so that the lower end side is located on the rear side of the traveling machine body. The inclination angle of the rearward descending guide surface 45a of the direction change guide 45 is steeper than the inclination angle of the rearward descending guide surface 44a of the flow guide 44.

Therefore, the exhaust device 40 discharges the exhaust of the engine 11 as follows.
That is, the engine exhaust discharged from the exhaust manifold 11 a is introduced into the muffler body 41 a of the exhaust muffler 41 to silence the exhaust, and the engine exhaust discharged from the exhaust port 42 a of the exhaust muffler 41 is introduced to the front end side of the exhaust pipe 43. Then, the introduced engine exhaust is flow-guided by the exhaust pipe 43 to the lower part of the rear part of the traveling machine body located below the connection case 51. The exhaust pipe 43 joins the cooling air introduced into the exhaust pipe 43 from the outside of the exhaust pipe 43 through the ejector passage 48 to the engine exhaust to lower the temperature of the engine exhaust. The engine exhaust is flow-guided without causing a local temperature rise in the exhaust pipe 43 due to the engine exhaust by preventing the engine exhaust from being locally accumulated. The engine exhaust fluidly guided to the rear lower part of the traveling machine body by the exhaust pipe 43 is exhausted from the exhaust port 43 a of the exhaust pipe 43. At this time, the engine exhaust discharged from the exhaust port 43a of the exhaust pipe 43 flows along the axis 43d of the exhaust pipe 43 and travels by the guide surface 44a of the flow guide 44 so as to prevent it from hitting the ground. Guide the aircraft to flow backwards. The flow direction of the engine exhaust from the flow guide 44 is set so that the engine exhaust that has flowed from the flow guide 44 toward the rear of the traveling machine body is less likely to flow toward the fuel tank 17 and is not likely to be scattered upward. The flow direction is changed to the downward direction of the traveling machine body by the inclined guide surface 45a of the direction change guide 45.

  As shown in FIG. 5, the upper end 45 e of the direction changing guide 45 in the guide main body 45 </ b> A is arranged at an arrangement height higher than the arrangement height of the upper end 43 r of the discharge port 43 a of the exhaust pipe 43. The lower end 45b of 45A is arranged at an arrangement height lower than the arrangement height of the lower end 43f of the discharge port 43a of the exhaust pipe 43. The width W1 of the orientation changing guide 45 in the guide body 45A is set to be larger than the diameter of the exhaust pipe 43. Accordingly, the direction change guide 45 overlaps the entire exhaust port 43a of the exhaust pipe 43 in the rear view of the traveling machine body. When the traveling machine body is moved backward in the wet field, the direction change guide 45 is directed toward the exhaust port 43a of the exhaust pipe 43. The moving mud is received behind the exhaust pipe 43 by the direction change guide 45 to make it difficult to enter the exhaust port 43a of the exhaust pipe 43. That is, the direction changing guide 45 exhibits a dozer function of receiving mud in the space on the back side of the guide main body 45A and the horizontal frame 34 and causing the received mud to flow upward and laterally outward by the inclination of the guide main body 45A.

  FIG. 10 is a perspective view showing the entire orientation changing guide 45. FIG. 11 is a longitudinal side view showing the orientation changing guide 45 in the attached state. FIG. 12 is a rear view showing the orientation changing guide 45 in the attached state. As shown in these drawings, the direction changing guide 45 includes a guide main body 45A having an inclined guide surface 45a, a mounting portion 45C connected to the upper end of the guide main body 45A via a relay portion 45B, and the guide main body 45A. And a locking portion 45D provided on the back side.

  The orientation changing guide 45 is a lateral orientation in which a guide main body 45A and a relay portion 45B are inserted between a pair of left and right front and rear frames 33 and 33 constituting the machine body frame 2 and connected across the pair of left and right front and rear frames 33 and 33. The mounting portion 45C is fastened together with the connecting member 35 with the connecting screw 35 on the upper surface side of the frame 34 in an assembly posture in which the engaging portion 45D and the guide main body 45A are engaged with the vertical side portion 34a of the frame 34. By being connected, a predetermined assembled state is obtained. The connecting member 36 connects the bottom of the threshing device 5 to the lateral frame 34.

  Cutout portions 45 c and 45 d are formed on both lateral sides of the direction changing guide 45. One notch portion 45c is provided across the guide main body 45A, the relay portion 45B, and the attachment portion 45C. The other notch 45d is provided across the guide body 45A and the relay part 45B. The notches 45c and 45d allow the front and rear frame 33 to enter, so that the lateral width W1 at the lower end side of the guide main body 45A and the lateral width W2 at the mounting portion 45D are set to the left and right pair of front and rear frames 33 and 33. The width is set larger than the interval W3.

[Configuration of the grain recovery unit]
FIG. 13 is a side view showing the grain collection unit 6. As shown in FIGS. 1, 3, 6, and 13, the grain collection unit 6 includes a tank 20 configured in a hopper shape for bagging, and a plurality of the grains collection unit 6 that are arranged below the tank 20 in the longitudinal direction of the traveling machine body. And a bag receiving deck 23 and a work table 24 mounted on the machine body frame 2.

  The tank 20 supplies and stores the threshing grains transported from the first screw conveyor 9 of the threshing device 5, and stores the threshing grains arranged in the front-rear direction of the traveling machine body at the bottom of the tank 20. The discharged discharge cylinder 24 discharges.

  The bag support portion 21 is attached to the bag support rod 22 with locking portions that are provided with eyerings on both sides of the entrance / exit of the bag bag 25 (see FIG. 1). The bag support bag 22 is suspended and supported by the bag support bag 22. The bag receiving deck 23 receives and supports the bottom side of the bag 25 suspended and supported by the bag support rod 22. The work table 24 is used for boarding by a worker who performs a bagging operation of mounting an empty bag 25 on the discharge cylinder 24 or removing a full bag 25 from the discharge cylinder 24.

  As shown in FIGS. 13 and 14, the front end side of the tank 20 has a front support structure 60 provided across a pair of left and right front struts 61, 61 erected on the body frame 2 and the front wall portion 20 a of the tank 20. Are supported by a pair of left and right front columns 61, 61.

  As shown in FIGS. 14, 15, and 16, the front support structure 60 is configured by connecting a sheet metal member to a support frame 62 that faces the traveling machine body that is connected across a pair of left and right front columns 61 and 61, and an intermediate portion of the support frame 62. And a front connecting leg portion 64 formed by connecting a sheet metal member to the front wall portion 20 a of the tank 20. A bottom part 64 a provided on the front connection leg part 64 is placed on the tank cradle part 63 and is fastened and connected by a connection bolt 65.

  The support frame 62 and the right front support 61 are connected by placing the support frame 62 on the upper end of the front support 61 and welding. The support frame 62 and the left front support 61 are connected by connecting a connecting portion 62a formed by connecting a sheet metal to the support frame 62 to a support 61a formed by connecting a sheet metal member to the front support 61. Has been.

  As shown in FIGS. 13 and 17, the rear end side of the tank 20 is rear-mounted via a rear support structure 70 provided across a rear column 71 erected on the body frame 2 and a rear wall portion 20 b of the tank 20. It is supported by the support 71.

  As shown in FIGS. 17, 18, and 19, the rear support structure 70 includes a support arm 72 extending from the rear support 71 to the lateral side of the traveling machine body, and a tank formed by connecting a sheet metal member to the support arm 72. The pedestal portion 73 and a rear connecting leg portion 74 formed by connecting a sheet metal member to the rear wall portion 20b of the tank 20 are provided. A bottom part 74 a provided on the rear connecting leg part 74 is placed on the tank cradle part 73 and is tightened and connected by a connecting bolt 75.

  The grain collection unit 6 is provided with a fixed handle 80 disposed on the laterally outer side of the lower part of the tank 20 and a back pad 81 provided on the front end side of the tank 20. The fixed handle 80 is supported manually by the bagging operator so as to stabilize the body. The back pad 81 supports the back pad so that the bagging operator can stabilize the body.

  As shown in FIGS. 14, 15, and 16, the backrest body 81 swings via a support shaft 81 a on a support portion 82 formed by attaching a bracket and a cylinder to a support frame 62 positioned on the front side of the tank 20. A swing arm portion 81A supported to be movable up and down, a support arm portion 81B extending from the tip of the swing arm portion 81A toward the rear of the traveling machine body, and a back cushion 81C provided on the support arm portion 81B. And can be switched between a lowered use posture and a raised storage posture around the axis of the support shaft 81a.

  FIG. 20 is a front view showing the backrest body 81 in a state where it is switched to the lowered use posture. Like the back support body 81 shown by a solid line in this figure and the back support body 81 shown by a two-dot chain line in FIG. 3, the back support body 81 is swung down around the axis of the support shaft 81a to swing. When the arm portion 81A comes into contact with and is supported by the stopper 83 provided at the end of the support frame 62 on the lateral outer side of the traveling machine body, the lowering use posture is set. That is, the back pad cushion 81C is positioned on the lateral outer side of the tank 20, and the operator can support the back pad cushion 81C against the back pad cushion 81C. The stopper 83 includes a cushion rubber 84, and receives and supports the swing arm portion 81A via the cushion rubber 84.

  FIG. 14 shows the backrest body 81 switched to the raised storage posture. Like the back support body 81 shown by the solid line in this figure and FIG. 3, the back support body 81 is lifted and swung around the axis of the support shaft 81 a so that the back support cushion 81 </ b> C is positioned above the tank 20. , It will be in the raised storage posture. At this time, a locking pin 86 supported by a support portion 85 formed by connecting a bracket to the support frame 62 is caused to act on a pin hole provided in the swing arm portion 81A, so that the backrest body 81 is raised and retracted. Can be fixed.

  Two bagging workers may be boarded in the grain collection unit 6. For this case, as shown in FIG. 21, a backrest body 91 can be provided on the rear side of the tank 20. FIG. 22 is a rear view showing the attachment structure 92 for attaching the back pad 91 provided on the rear side of the tank 20. FIG. 23 is a plan view in an exploded state of the attachment structure 92 for attaching the back pad 91 provided on the rear side of the tank 20. 24 is a sectional view taken along the line XXIV-XXIV in FIG. As shown in these drawings, the attachment structure 92 for attaching the back pad 91 disposed on the rear side of the tank 20 is configured to include an extension arm 93.

  The extension arm 93 includes a connecting portion 94 formed by connecting a bent sheet metal to the base end portion, and the connecting portion 94 is externally fitted to the distal end portion of the support arm 72 located on the rear side of the tank 20. The support arm 72 is provided with an extension 72 </ b> A extending from the support arm 72 toward the lateral side of the traveling machine body by being tightened and connected to the support arm 72 by the connecting bolt.

  The extension arm 93 includes a support portion 95 formed by connecting a bracket and a cylinder to the base end portion, a lock pin 97 attached to the base end portion via the bracket 96, and a stopper 98 provided at the tip end portion. The support portion 72 is provided with a support portion 95, a lock pin 97, and a stopper 98.

  By supporting the swing arm portion 91A of the back support body 91 through the support shaft 99 so as to be swingable up and down by the support portion 95, the back support body 91 is lowered and used in the lowered use posture and the raised storage posture. It can be deployed in a switchable manner.

  That is, when the back support body 91 on the rear side is lowered and swung around the axis of the support shaft 99 so that the swing arm 91A is in contact with and supported by the stopper 98, the back cushion 91C is moved. It is located on the laterally outer side of the tank 20 and is in a lowered use posture so that the back can be put against the back cushion 91C.

  When the back support 91 on the rear side is lifted and swung around the axis of the support shaft 99 and the back support cushion 91C is positioned above the tank 20, the back support 91 is in the lifted storage posture. At this time, by making the lock pin 97 act on the pin hole provided in the swinging arm portion 91A, the backrest body 91 can be fixed in the ascending storage posture.

  In the above-described configuration in which the back support body 91 is provided on the rear side of the tank 20, when the back support body 91 on the rear side is unnecessary, the extension arm 93 is removed, and the traveling machine body laterally outside the structure on the rear side of the tank 20 You can eliminate the ledge that heads for.

[Another Example]
(1) In the above-described embodiment, the example in which the discharge port 43a of the exhaust pipe 43 is arranged on the inner side from the rear end of the traveling machine body is shown. You may implement.

  (2) In the above-described embodiment, an example in which the orientation changing guide 45 is provided has been described. However, the orientation changing guide 45 may be omitted.

  (3) Although the example which provided the grain collection | recovery part 6 comprised so that a threshing bag may be packed was shown in the above-mentioned Example, the threshing grains were collect | recovered and stored in a grain tank, and a grain tank is stored. You may implement by providing the grain collection | recovery part comprised so that the stored grain might be taken out with the discharge auger.

  (4) In the above-described embodiment, an example in which the ejector passage 48 is provided has been described. However, the ejector passage 48 may be omitted.

  (5) In the above-described embodiment, an example in which the flow guide 44 is mounted on the exhaust pipe 43 is shown. However, a support portion for the flow guide is provided in the machine body frame 2, and the flow guide 44 is provided in the exhaust port 43 a of the exhaust pipe 43. You may employ | adopt and implement the structure made to support on the support part of the body frame 2 by the arrangement | positioning which contacts the lower side.

  The present invention includes a combiner provided with a threshing device 5 configured as a self-removal type, and a threshing device configured as a whole-powder input type so that the harvested cereal cocoons are input into the treatment room from the stock to the tip. Can also be used for combine.

DESCRIPTION OF SYMBOLS 3 Driving | operation part 5 Threshing apparatus 6 Grain collection | recovery part 11 Engine 41 Exhaust muffler 42a Exhaust port of exhaust muffler 43 Exhaust pipe 43a Exhaust pipe outlet 43d Exhaust pipe axis 43f Exhaust pipe lower end 43r Exhaust outlet upper end 44r Exhaust outlet upper end 44 Flow guide 44a Guide surface of flow guide 45 Orientation change guide 45b Lower end of orientation change guide 45e Upper end of orientation change guide

Claims (4)

A driving unit provided in the front part of the traveling machine body, an engine provided below the driving part, and a threshing device and a grain recovery unit provided side by side in the lateral direction of the traveling machine body behind the driving part. A combine,
An exhaust muffler for the engine is provided at the top of the engine,
An exhaust pipe that guides and exhausts the exhaust from the exhaust muffler is provided in a straight line from the exhaust port of the exhaust muffler through the gap between the threshing device and the grain recovery unit toward the lower rear of the traveling machine body. ,
A flow guide that includes a guide surface having an angle intersecting the axis of the exhaust pipe and guides the exhaust pipe exhaust so as to flow toward the rear of the traveling machine body by the guide surface. Combines located on the lower side.   The combine according to claim 1, wherein the flow guide is attached to the exhaust pipe.   The combine according to claim 1 or 2, wherein a direction changing guide for changing a flow direction of the exhaust gas from the flow guide to a downward direction of the traveling machine body is provided behind the exhaust pipe.   The upper end of the direction changing guide is positioned higher than the upper end of the exhaust port of the exhaust pipe, and the lower end of the direction changing guide is positioned lower than the lower end of the exhaust port of the exhaust pipe. The combine according to claim 3.

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