JP2018088850A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve accessibility to an urea water tank while increasing the capacity of a grain tank.SOLUTION: A combine harvester 1 includes a grain tank 8 and a vertical auger 10. The grain tank 8 reserves grains and is mounted on one of the upper right and left sides of a machine frame 2 where an engine 20 is installed. The vertical auger 10 upwardly conveys grains reserved in the grain tank 8 and is mounted on the rear of the grain tank 8. The combine harvester 1 includes an exhaust gas purifying device 30 and an urea water tank 40. The exhaust gas purifying device 30 includes an urea SCR catalyst 32 reducing the exhaust gas from the engine 20 using ammonia generating from urea water to purify the exhaust gas. The urea water tank 40 reserves the urea water to be supplied to the urea SCR catalyst 32 and is mounted between the grain tank 8 and the vertical auger 10 on the machine frame 2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a combine.

  A conventional combine is provided with a traveling device at the lower part of the fuselage frame, a threshing device is provided at the upper left side of the fuselage frame, a grain tank is provided at the upper right side of the fuselage frame, and a front side of the grain tank on the fuselage frame. A diesel engine is provided at the site.

  Some of these combiners include an exhaust gas purification device for purifying engine exhaust gas in order to adapt to exhaust gas regulations that have been strengthened in recent years. Further, the exhaust gas purifying apparatus includes a urea SCR (Selective Catalytic Reduction) catalyst that purifies the ammonia by reacting it with ammonia generated from an aqueous urea solution (hereinafter referred to as “urea water”) with nitrogen oxides in the exhaust gas. There is something.

  When the exhaust gas purification device is configured to include a urea SCR catalyst, a urea water tank that stores urea water to be supplied to the urea SCR catalyst is installed in any place of the combine body. As an installation location of the urea water tank, there is, for example, a rear portion of the machine body and a portion below an inclined surface formed in an inner lower portion facing the threshing device in the Glen tank (see, for example, Patent Document 1). As another installation location of the urea water tank, for example, there is a portion below the exhaust gas purification device in the space between the Glen tank and the rear surface of the engine room (see, for example, Patent Document 2).

Japanese Patent Laying-Open No. 2015-7397 JP 2006-1558591 A

  However, like the conventional combine as described above, when the urea water tank is arranged at the rear part of the fuselage and below the inclined surface formed at the inner lower part of the Glen tank, it is usually arranged at this part. Since the fuel tank or the like is in the way, it is necessary to form a space for arranging the urea water tank by cutting the side region of the Glen tank, so that the capacity of the Glen tank is reduced.

  Further, when the urea water tank is disposed between the glen tank and the rear surface of the engine room and is disposed below the exhaust gas purification device, the urea water tank is disposed at the center of the fuselage. Access to the urea water tank (water supply port) is low, for example, the work of supplying water to the urea water tank becomes complicated.

  This invention is made | formed in view of the above, Comprising: It aims at providing the combine which can earn the capacity | capacitance of a glen tank and can improve the accessibility with respect to a urea water tank.

  In order to solve the above-described problems and achieve the object, the invention according to claim 1 is provided with a grain tank for storing grains on the upper left and right sides of the body frame on which the engine is installed. A urea SCR catalyst for reducing and purifying the exhaust gas of the engine using ammonia generated from urea water in a combine provided with a vertical auger that conveys grains stored in the Glen tank upward An exhaust gas purifying apparatus including a urea water tank for storing urea water to be supplied to the urea SCR catalyst between the Glen tank and the vertical auger on the fuselage frame; To do.

  According to a second aspect of the present invention, the machine body frame is provided with a takeover member that supports the vertical auger and takes over the grain conveyed backward from the grain tank to the vertical auger, and The combine according to claim 1, wherein a water tank is disposed above the takeover member.

  According to a third aspect of the present invention, the takeover member has an inflow surface into which grains conveyed backward from the grain tank flows, and is fixed to a portion of the takeover member on the inflow surface side. The combine according to claim 2, further comprising a support frame provided with a base portion on which the urea water tank is disposed.

  According to a fourth aspect of the present invention, the urea water tank is a combine according to any one of the first to third aspects, wherein the urea water tank is disposed so that a water supply port of the urea water faces the outer side of the body.

  According to a fifth aspect of the present invention, there is provided the combine according to any one of the first to fourth aspects, wherein at least a part of the urea water tank enters a recess formed in a rear surface of the Glen tank.

  According to the first aspect of the present invention, it is possible to arrange the urea water tank while suppressing an increase in the size of the airframe and suppressing a decrease in the capacity of the Glen tank. In addition, since the urea water tank is arranged at the rear part of the fuselage, the urea water tank can be easily supplied compared to the case where the urea water tank is arranged at the central part of the fuselage, thereby improving the accessibility to the urea water tank. be able to.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the urea water tank can be arranged so as not to disturb the grain conveyance path from the grain tank to the vertical auger. .

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the support frame reinforces the support part by providing the support frame with the base part on which the urea water tank is arranged. Thus, the strength of the pedestal can be increased. Thereby, a urea water tank can be installed firmly.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, urea water is supplied from the water supply port of the urea water tank facing the outer side of the machine body. Can be replenished.

  According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, at least a part of the urea water tank is formed in the recess formed on the rear surface of the glen tank. By inserting, the capacity of the urea water tank can be set large while the space between the Glen tank and the vertical auger is reduced to make the airframe compact. In addition, for example, when the Glen tank is configured to rotate outwardly of the fuselage about the vertical axis, the urea water tank escapes from the recess on the rear surface of the Glen tank and remains on the fuselage side. Piping to the SCR catalyst side can be simplified.

It is a right view of the combine which concerns on embodiment. It is a left view of the combine which concerns on embodiment. It is a front view for explanation which shows arrangement of an exhaust gas purification device and a urea water tank. It is a right side view for explanation which shows arrangement of an exhaust gas purification device and a urea water tank. It is an expansion right side view for explanation which shows arrangement of a urea water tank. It is a top view for explanation which shows arrangement of an exhaust gas purification device and a urea water tank. It is an enlarged plan view for explanation showing the arrangement of the urea water tank. (A) It is explanatory drawing (the 1) which shows the structural member of an exhaust pipe, (b) It is explanatory drawing (the 2) which shows the structural member of an exhaust pipe. (A) Typical sectional view for explanation showing an example of an exhaust pipe, (b) Typical sectional view for explanation showing another example of an exhaust pipe. FIG. 4A is an explanatory right side view showing a track roller frame, FIG. 4B is an explanatory plan view showing the track roller frame, and FIG. 4C is an explanatory schematic perspective view showing a reinforcing member. It is an explanatory top view which shows the outer cover of a radiator cover. FIG. 6 is an explanatory part diagram showing components of an outer cover of a radiator cover. It is an operation | movement figure for description which shows the locking operation of the locking mechanism of an external cover.

  An embodiment of a combine according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment, In the range which does not deviate from the main point of this invention, it can implement in various deformation | transformation. Furthermore, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same, that is, so-called equivalent ranges.

  1 and 2 are left and right side views of the combine 1 according to the embodiment. In the following description, the front-rear direction, the left-right direction, and the up-down direction in the normal usage mode of the combine 1 will be described as the respective front-rear direction, left-right direction, and up-down direction in each part.

  Among these, the “front” direction is the traveling direction of the combine 1 during the cutting operation, the “left” direction is the left-hand direction toward the front, and the “lower” direction is the direction in which gravity acts. In addition, these directions are defined for convenience in order to make the explanation easy to understand, and the present invention is not limited by these directions. Hereinafter, the combine 1 may be referred to as “airframe”.

<Overall configuration of combine 1>
First, the overall configuration of the combine 1 will be briefly described. As shown in FIGS. 1 and 2, the combine 1 includes a body frame 2, a traveling device 3 provided below the body frame 2, an upper portion of the body frame 2, and various types provided in front of the body frame 2. A work device and a control unit (hereinafter referred to as “cabin”) 7 provided on the upper front side of the body frame 2 are provided. The cabin 7 is provided with various operation levers and instruments.

  The traveling device 3 includes a pair of left and right crawler belts 3 a and 3 a that are rotated by the power transmitted from the engine 20 installed on the body frame 2. The traveling device 3 causes the aircraft to travel by the crawler belt 3a. The crawler belt 3a is formed endlessly by an elastic body such as rubber. The traveling device 3 includes drive wheels 3b that rotate the crawler belt 3a and tension wheels 3c that apply tension to the crawler belt 3a in the longitudinal direction of the machine body.

  The traveling device 3 includes a pair of left and right track roller frames 60 and 60. A plurality of rolling wheels 61 are provided on the track roller frame 60 so as to come into contact with the ground contact surface of the crawler belt 3a from the inside. The combine 1 includes a rolling mechanism that lifts and lowers the traveling device 3 including the crawler mechanism independently of the body frame 2, and a pitching mechanism that integrally swings the traveling device 3 including the crawler mechanism back and forth. Is provided.

  For example, the working device is provided on the left side of the upper part of the body frame 2, the harvesting device 4 provided in front of the body frame 2, the grain feeder 5 provided on the left side of the cabin 7 on the body frame 2. A threshing device 6, a grain tank 8 provided on the upper right side of the machine body frame 2, and a grain discharge auger 9 disposed further above the threshing device 6 and the grain tank 8 are provided. In the working device, the cereals harvested by the reaping device 4 are transported toward the threshing device 6 by the cereal transporting device 5, and the grains threshed and selected by the threshing device 6 are stored in the Glen tank 8. The grain stored in is discharged to the outside of the machine body with a grain discharge auger 9.

  As described above, the cabin 7 provided on the upper front side of the machine body frame 2 functions as a control unit, and can display a pilot seat, various control levers, instruments, an operation panel, and various information not shown. A simple monitor is provided.

  The reaping device 4 includes a weed stalk 4a for weeding the cereals in the field, a pulling device 4b for causing the weed cereals, and a cutting blade for cutting the roots of the caused cereals. In the reaping device 4, the cereals to be planted in the field are weeded with the weed stalk 4a, the sown cereals are caused by the pulling device 4b, and the caused cereals are harvested by the cutting blade. In addition, the harvested corn straw is conveyed toward the threshing apparatus 6 by the corn flour conveying apparatus 5.

  In the threshing device 6, the grain selected in the selection unit (not shown) after threshing is fed into the glen tank 8 by the cerealing device (not shown). In the grain tank 8, the stored grain is fed into a vertical auger 10 provided behind the grain tank 8 (back of the machine frame 2). In the vertical auger 10, the fed grain is fed into the grain discharge auger 9.

  The vertical auger 10 is formed in a cylindrical shape, and supports the grain discharge auger 9 at the upper end so as to be rotatable in the vertical direction and the horizontal direction. Further, the vertical auger 10 is supported at the lower end portion so as to be rotatable around an axis by a takeover member 11 (see FIG. 4). The vertical auger 10 and the takeover member 11 will be described later with reference to FIGS.

  Further, as shown in FIG. 1, an engine room 25 is provided on the machine body frame 2 on the lower right side of the cabin 7. The engine room 25 accommodates an engine 20 that is a power source, a radiator (not shown) for cooling the engine 20, and the like.

  Here, the vertical auger 10 and the takeover member 11 will be described with reference to FIGS. FIG. 3 shows a front view (inflow surface) of the takeover member 11, and FIGS. 4 and 5 show a right side view of the takeover member 11. As shown in FIG. 3, in the Glen tank 8, the stored grain is conveyed backward. The grain conveyed from the grain tank 8 flows into the takeover member 11 from an inflow port 11aa formed on the inflow surface 11a of the takeover member 11.

  The vertical auger 10 is formed in a cylindrical shape, and is arranged with its axis facing vertically. The vertical auger 10 conveys the grains from the bottom to the top by means of spiral conveyance (flouring). The grain that has been whipped by the vertical auger 10 is conveyed toward the tip side of the grain discharge auger 9 by the grain discharge auger 9 (see FIGS. 1 and 2), which is a horizontal auger, and provided at the tip part. It is discharged from the discharge tube 9a (see FIGS. 1 and 2).

  The takeover member (hereinafter referred to as “takeover metal”) 11 includes an inflow surface 11a and an outflow surface 11b. The inflow surface 11a is a front end surface of the takeover metal 11 formed in an annular shape. The inflow surface 11a is formed with a substantially circular inflow port 11aa into which the grains transported rearward by a transport spiral (not shown) provided at the bottom of the Glen tank 8 flow. The outflow surface 11b is an upper end surface of the takeover metal 11 formed in an annular shape, and is set in a posture substantially orthogonal to the inflow surface 11a. On the outflow surface 11b, a substantially circular outlet 11bb for conveying the grain from the takeover metal 11 toward the vertical auger 10 is formed.

  That is, the takeover metal 11 has a bowl shape as a whole and is attached to the body frame 2. The takeover metal 11 protrudes rearward from the rear end portion of the body frame 2. In the takeover metal 11, the grain flowing from the front side is conveyed upward and taken over by the vertical auger 10. Further, the lower portion of the support frame 13 is fixed to a portion of the takeover metal 11 on the inflow surface 11a side. The takeover metal 11 is fixed to the body frame 2. The outflow surface 11b of the takeover metal 11 supports the vertical auger 10 so as to be rotatable around its axis.

<Exhaust gas purification device 30 and urea water tank 40>
Next, the exhaust gas purification device 30 and the urea water tank 40 will be described with reference to FIGS. FIG. 3 is an explanatory front view showing the arrangement of the exhaust gas purifying device 30 and the urea water tank 40. FIG. 4 is a right side view for explanation showing the arrangement of the exhaust gas purifying device 30 and the urea water tank 40. FIG. 5 is an enlarged right side view for explanation showing the arrangement of the urea water tank 40. FIG. 6 is a plan view for explaining the arrangement of the exhaust gas purifying device 30 and the urea water tank 40. FIG. 7 is an enlarged plan view for explanation showing the arrangement of the urea water tank 40.

  First, the exhaust gas purification device 30 will be described, and then the urea water tank 40 will be described. As described above, the engine 20 is accommodated in the engine room 25 (see FIG. 1) provided in front of the Glen tank 8. For example, as shown in FIG. 4, the engine 20 is installed on the right side of the body frame 2 and is connected to an exhaust gas purification device 30 that purifies the exhaust gas of the engine 20 provided on the body frame 2.

  As shown in FIG. 3, the exhaust gas purification device 30 is connected to an exhaust pipe 22 connected to an exhaust manifold 21 of the engine 20. The exhaust gas purification device 30 is preferably disposed above the engine 20 and behind the engine 20, for example, by being disposed on a frame provided on the body frame 2. According to such an arrangement configuration, the exhaust gas purifying device 30 is hardly affected by vibrations from vibration sources such as the engine 20 and the traveling device 3.

  The exhaust gas purifying device 30 performs a purification process by selective catalytic reduction using a DPF (Diesel Particulate Filter) 31 (see FIG. 4) that removes particulate matter in the exhaust gas and urea water, that is, exhaust gas that has passed through the DPF 31. A urea SCR catalyst 32 (see FIG. 3) that converts nitrogen oxide in the gas into ammonia that is generated by hydrolysis of urea water and reacts with ammonia is provided. Both the DPF 31 and the urea SCR catalyst 32 are built in a cylindrical case. (In addition, the code | symbol in illustration is provided to each of these cases.)

  The DPF 31 carries a catalyst (Pt) on a honeycomb carrier, oxidizes SOF and NOx components, and collects particulate matter by filtration. For example, the DPF 31 includes a honeycomb carrier and a plurality of partition walls. It is formed of a honeycomb cell structure having a plurality of through-holes having a square cross section and an outer wall surrounding the cell structure.

  The exhaust gas purification device 30 has a function of DOC (Diesel Oxidation Catalyst) that efficiently oxidizes nitric oxide in the DPF 31, and a function of selective catalytic reduction using ammonia generated from urea water in the urea SCR catalyst 32. Have

In the exhaust gas purification device 30, in the DPF 31, nitrogen monoxide in the exhaust gas is converted to nitrogen dioxide, and urea water is injected into the nitrogen dioxide in a pipe connecting the outlet of the DPF 31 and the inlet of the urea SCR catalyst 32, By converting nitrogen dioxide into water and nitrogen gas, nitrogen oxides (NO _x ) in the exhaust gas are removed. The purified exhaust gas is discharged from the exhaust pipe 321 to the outside.

  Further, the exhaust gas purification device 30 includes a dosing module (hereinafter abbreviated as “DM”) 33 (see FIG. 6) that is also a urea water injection unit in the urea SCR catalyst 32. The DM 33 is provided close to a pipe connecting the outlet of the DPF 31 and the inlet of the urea SCR catalyst 32.

  Note that the DPF 31 and the urea SCR catalyst 32 (including the DM 33) that are the exhaust gas purification device 30 are, for example, U-shaped formed on the side surface (inner side surface) that faces the threshing device 6 among the side surfaces of the Glen tank 8. You may arrange | position in the space (it is also called a "space") formed by a dent (it is also called a "recess").

  According to such an arrangement configuration, the DPF 31 and the urea SCR catalyst 32 are covered with the threshing device 6 and the glen tank 8, and for example, the DPF 31 and the urea SCR catalyst 32 can be protected from rain and direct sunlight. In addition, the DPF 31 and the urea SCR catalyst 32 are less susceptible to the influence of high-pressure water during car washing. Further, when the Glen tank 8 is opened, the DPF 31 and the urea SCR catalyst 32 can be accessed, and maintenance of the DPF 31 and the urea SCR catalyst 32 becomes easy.

  Further, the DPF 31 and the urea SCR catalyst 32, which are the exhaust gas purifying device 30, are disposed above and behind the engine 20, for example, the DPF 31 and the urea SCR catalyst 32 are arranged in a straight line in the front-rear direction, for example, Glen If it is arranged in a dead space or the like below the tank 8, the space can be used effectively, which is preferable.

  As shown in FIG. 4, a mounting member 12 to which a supply module (hereinafter abbreviated as “SM”) 34 for sending urea water to the urea SCR catalyst 32 is provided at the rear part of the body frame 2. As shown in FIG. 5, the attachment member 12 is provided via a leg portion 12 a erected on a base portion 14 that supports a urea water tank 40 described later. The attachment member 12 is provided behind the Glen tank 8, and the SM 34 attached to the front end side and the front side of the attachment member 12 is combined with the front part of the urea water tank 40 attached to the rear side of the attachment member 12. It can be placed in a space formed by a recess (recess) 35 formed on the rear surface of the Glen tank 8 (that is, a “recess” in the claims).

  Further, the SM 34 is attached to the distal end side of the attachment member 12, so that the SM 34 is disposed away from the machine body frame 2. For this reason, it is possible to suppress the vibration from the vibration source from being transmitted to the SM 34, and to prevent the SM 34 from being damaged. In addition, since the SM 34 is disposed away from the DPF 31 and the urea SCR catalyst 32 which are the exhaust gas purifying device 30, the SM 34 is hardly affected by the heat generated from the DPF 31 and the urea SCR catalyst 32.

  As shown in FIGS. 4 to 7, the urea water tank 40 stores urea water supplied to the urea SCR catalyst 32. As shown in FIG. 5, the urea water tank 40 is allowed to enter a space (concave portion) 35 formed on the rear surface of the grain tank 8 at least partially between the grain tank 8 and the vertical auger 10 on the machine body frame 2. Provided. In this case, the urea water tank 40 does not interfere with the opening / closing operation of the Glen tank 8 (Glen tank cover).

  According to such an arrangement configuration, the urea water tank 40 can be arranged on the machine body frame 2 at a position where it does not interfere with the Glen tank 8. Thereby, the urea water tank 40 can be disposed while maintaining the shape of the current Glen tank. That is, it is possible to arrange the urea water tank 40 while suppressing an increase in the size of the airframe and suppressing a decrease in the capacity of the Glen tank 8. As a result, the capacity of the Glen tank 8 can be increased, such as leaving room for an increase in the capacity of the Glen tank 8.

  Further, since the urea water tank 40 is disposed at the rear portion of the body frame 2, that is, the rear portion of the body, for example, the urea water tank 40 is disposed in a narrow place such as a barn as compared with the case where the urea water tank 40 is disposed at the center portion of the body. Accessibility to the urea water tank 40 can be improved, for example, water can be easily supplied to the tank 40.

  Further, by inserting at least a part of the urea water tank 40 into the recess 35 formed on the rear surface of the grain tank 8, the distance between the grain tank 8 and the vertical auger 10 is reduced, and the aircraft body is configured compactly. The capacity of the water tank 40 can be set large. Further, for example, when the Glen tank 8 is configured to rotate outwardly of the fuselage about the vertical axis, the urea water tank 40 comes out of the recess 35 on the rear surface of the Glen tank 8 and remains on the fuselage side. The piping from the water tank 40 to the urea SCR catalyst 32 side can be simplified.

  Further, since the urea water tank 40 is disposed at a position away from the engine 20, the urea water tank 40 is not easily affected by heat (exhaust heat) from the engine 20. Thereby, deterioration of urea water can be suppressed.

  As shown in FIGS. 4 and 5, the urea water tank 40 is disposed above the takeover metal 11 that supports the vertical auger 10 at the rear of the machine body frame 2. According to such an arrangement configuration, the urea water tank 40 can be arranged so as not to obstruct the grain conveyance path from the grain tank 8 to the vertical auger 10.

  As shown in FIGS. 4 and 5, the urea water tank 40 is disposed on the upper surface of the base 14 provided on the support frame 13 fixed to the takeover metal 11 on the machine body frame 2. In addition, the upper surface of the base part 14 is a flat surface. By providing the base part 14 on which the urea water tank 40 is arranged on the upper part of the support frame 13, the support frame 13 reinforces the base part 14, and the strength of the base part 14 can be increased. Thereby, the urea water tank 40 can be firmly installed.

  As shown in FIGS. 6 and 7, the urea water tank 40 is disposed such that the urea water supply port 41 is located on the right side of the body frame 2. That is, the urea water tank 40 is disposed such that the water supply port 41 faces the outer side of the machine body. According to such an arrangement configuration, the cap can be manually removed from the water supply port 41 of the urea water tank 40 to supply water from the carrying tank. That is, the water supply work to the urea water tank 40 can be facilitated.

  The urea water tank 40 is provided with a cooling water pipe (not shown) for circulating the cooling water (antifreeze) of the engine 20. A cooling water pipe (also referred to as “cooling water pipe” or “LLC (long life coolant) pipe”) extending from the engine 20 to the urea water tank 40 is provided with a valve that shuts off the cooling water. The opening / closing operation of the valve is performed, for example, in the cabin 7.

  In the cooling water pipe connecting the engine 20 and the urea water tank 40, for example, the feed pipe reaches the urea water tank 40 from the engine 20 via a valve, and the return pipe is connected from the urea water tank 40 to the engine 20. Return to.

  When the urea water freezes, it becomes impossible to supply water to the urea SCR catalyst 32 side. However, the temperature of the cooling water of the engine 20 can be used to prevent freezing and thaw. In addition, when the urea water is heated too much, the quality is deteriorated. For example, by providing a valve in the path to the urea water, the urea water can be prevented from freezing and overheating by opening and closing the valve. The valve may be opened when the temperature in the urea water tank 40 becomes a predetermined temperature or lower. Thereby, freezing of urea water can be prevented more reliably.

  Further, in the upper part of the urea water tank 40, in addition to the cooling water pipe through which the cooling water of the engine 20 flows, a water level sensor for detecting the amount of urea water in the urea water tank 40 and urea water urea in the urea water tank 40. A sensor unit 42 in which density sensors for detecting density are unitized is detachably provided.

<Configuration of exhaust pipe 50>
Next, the configuration of the exhaust pipe 50 applied to the combine 1 will be described with reference to FIGS. 8 and 9. FIG. 8A and FIG. 8B are explanatory diagrams showing components of the exhaust pipe 50. 8A shows a side view of the exhaust pipe 50, and FIG. 8B shows a front view of the exhaust pipe 50. As shown in FIG. 9A is a schematic cross-sectional view for explaining an example of the exhaust pipe 50, and FIG. 9B is a schematic cross-sectional view for explaining another example of the exhaust pipe 50. is there.

  The exhaust pipe 50 is, for example, a pipe (also referred to as a “tail pipe”) that exhausts exhaust gas sent from the exhaust gas purification device 30 (urea SCR catalyst 32) to the atmosphere. In this case, the exhaust pipe 50 is connected to the tip of the exhaust pipe 321 (see FIG. 3) of the urea SCR catalyst 32. As shown in FIGS. 8A and 8B, the exhaust pipe 50 is formed in a polygonal cylindrical shape. In the illustrated example, the exhaust pipe 50 has a hexagonal cylindrical shape.

  Further, the exhaust pipe 50 is formed in a single pipe shape by combining two constituent members (hereinafter referred to as “exhaust pipe members”) 51a and 51b. As shown to Fig.9 (a), each exhaust pipe member 51a, 51b has the four surfaces 52, respectively, and is formed in U shape by sectional view. The exhaust pipe member 51a (51b) is formed, for example, by bending a single metal plate. In this case, the bending angle α between the surfaces 52 is preferably the same angle (for example, 120 degrees). According to such a configuration, for example, mass production can be performed with a single press (jig), and productivity and work efficiency during manufacturing can be improved. Further, the cost required for manufacturing equipment such as a press machine can be reduced.

  Further, as shown in FIGS. 8A and 8B, the exhaust pipe 50 is joined by changing the angle of the cut surfaces of the exhaust pipe members 51a and 51b, so that the exhaust pipe 50 formed by the joint surface 53 is joined. The bend angle can be adjusted. Thereby, the exhaust pipe 50 can be bent freely, and the freedom degree of the shape of the exhaust pipe 50 can be improved. Even with such a configuration, productivity and work efficiency during manufacturing can be improved.

  Further, as shown in FIGS. 8B and 9A, the exhaust pipe 50 includes a pipe formed by the exhaust pipe members 54a and 54b in a pipe formed by the exhaust pipe members 51a and 51b. Such a double structure may be formed. In this case, in the exhaust pipe 50, exhaust gas flows through the inner pipes (exhaust pipe members 54a and 54b), and the outer pipes (exhaust pipe members 51a and 51b) serve as a cover for protecting the inner pipe. According to such a configuration, it is possible to suppress dust and the like from entering the exhaust pipe 50.

  As shown in FIG. 8B, the exhaust pipe 50 has an inner pipe (a pipe formed by the exhaust pipe members 54a and 54b through which exhaust gas flows) on the proximal end side and an outer pipe (exhaust pipe member 51a). , 51b, which is longer than the tube which protects the inner tube), and on the tip side, the inner tube is shorter than the outer tube. Further, the exhaust pipe 50 has a gap between the inner pipe and the outer pipe. According to such a configuration, by utilizing the ejector effect, outside air is sucked in as shown by an arrow A in FIG. 8B on the proximal end side of the exhaust pipe 50, and outside air flows outside the inner pipe. By flowing, the exhaust gas flowing through the inner pipe can be cooled. Since the inner tube is shorter than the outer tube, outside air and exhaust gas are mixed and discharged from the exhaust port 55 in the vicinity of the exhaust port 55 of the exhaust tube 50.

  Further, as shown in FIG. 9A, the exhaust pipe 50 is formed by fitting exhaust pipe members 51a and 51b (exhaust pipe members 54a and 54b) constituting the exhaust pipe 50 vertically and horizontally. The When the exhaust pipe members 51a and 51b (exhaust pipe members 54a and 54b) have the same shape, the exhaust pipe members 51a and 51b (exhaust pipe members 54a and 54b) are fitted so as to be staggered inside and outside. According to such a configuration, it is possible to suppress the entry of dust and the like from the top and bottom or the left and right of the exhaust pipe 50 by the overlapping portion in the fitting portion.

  As shown in FIG. 9B, in another example of the exhaust pipe 56, one of the exhaust pipe members 51a and 51b (exhaust pipe members 54a and 54b) has a smaller diameter than the other. Are fitted on the outside and the other on the inside. Also with such a configuration, it is possible to suppress the entry of dust and the like from the top and bottom or the left and right of the exhaust pipe 56 by the overlapping portion in the fitting portion.

<Track roller frame 60>
Here, the track roller frame 60 will be described with reference to FIG. FIGS. 10A and 10B are explanatory views showing the track roller frame 60. FIG. 10A shows a right side view of the track roller frame 60, and FIG. 10B shows a plan view of the track roller frame 60. As shown in FIG. FIG. 10C is a schematic perspective view for explanation showing the reinforcing member 64.

  As described above, the track roller frame 60 is a part of the traveling device 3 (see FIG. 1 and FIG. 2), and supports the plurality of wheels 61 while being supported by the traveling device 3. As shown in FIGS. 10A and 10B, in the track roller frame 60, two plates 62 and 62 that are long in the front-rear direction are disposed to face each other in the thickness direction (left-right direction). A gap is formed between the two plates 62 and 62. On the front side of the track roller frame 60, a reinforcing plate 63 that connects the two plates 62 and 62 and has a function of reinforcing the track roller frame 60 in the thickness direction is provided.

  The reinforcing plate 63 has walls (front wall 63a and rear wall 63b) provided so as to shield the two plates 62, 62 in the thickness direction. According to such a configuration, in addition to the strength of the track roller frame 60 being increased by the reinforcing plate 63, the front wall 63a and the rear wall 63b are provided so as to block between the two plates. It is possible to prevent mud or the like from entering between the two plates 62 and 62 from the front when the machine is moving forward.

  Further, as shown in FIGS. 10A and 10B, a reinforcing member 64 is provided between the two plates 62 and 62 on the front side and the rear side of the track roller frame 60. As shown in FIG. 10C, the reinforcing member 64 is formed in a U shape. Further, as shown in FIGS. 10A and 10B, the reinforcing member 64 is disposed so that the top plate portion 64 a connects between the two plates 62 and 62. Thereby, the strength in the thickness direction of the track roller frame 60 can be increased. Further, the distance between the two plates 62 and 62 can be adjusted by the reinforcing member 64. For this reason, the member which adjusts between the two plates 62 and 62 becomes unnecessary, and can reduce a number of parts.

  Further, as shown in FIGS. 10A and 10B, two plates 62 are provided around the shaft portion 65 to which the rolling arm is attached in the track roller frame 60 to be connected to the rolling mechanism described above. , 62 are provided with reinforcing members (also referred to as “reinforcing plates”) 66. For this reason, the intensity | strength of the part where stress concentrates like the circumference | surroundings of the axial part 65 can be raised. Further, the reinforcing plate 66 that reinforces the two plates 62 and 62 can be reused for each part by changing the direction of the reinforcing plate 66 or by placing the reinforcing plate 66 upside down. (Mass productivity) can be improved.

<External cover 71 of the radiator cover 70>
Here, the outer cover 71 of the radiator cover 70 will be described with reference to FIGS. 11 to 13. FIG. 11 is an explanatory plan view showing the outer cover 71 of the radiator cover 70. FIG. 12 is an explanatory part diagram showing components of the outer cover 71 of the radiator cover 70. FIG. 13 is an explanatory operation diagram illustrating the locking operation of the locking mechanism of the external cover 71.

  In the engine room 25 (see FIG. 1), a radiator (not shown) disposed outside the engine 20 is housed together with the engine 20 (see FIG. 1). The radiator cover 70 is a cover that covers the outside of the radiator. Further, as shown in FIG. 11, an outer cover 71 that covers the outer portion of the radiator cover 70 is provided on the outer side of the radiator cover 70.

  In the following description, the outer cover 71 of the radiator cover 70 is a lateral opening that opens and closes in the direction of the arrow B in FIG. 11 by rotating around the axis of the rotating shaft 76 along the vertical direction. A case where the rotation shaft 76 is provided on the rear side of the room 25 will be described as an example. As shown in FIGS. 11 and 12, the external cover 71 includes a door portion 72, a rotation shaft 76, and an attachment stay 77. The door part 72 includes an upper window part 73a and a lower window part 73b. Both the upper window portion 73a and the lower window portion 73b have a mesh structure so as to be able to ventilate and prevent entry of dust and the like. The upper window portion 73a and the lower window portion 73b are partitioned by a frame 74.

  A lever 75 that can be gripped by an operator or the like is provided on the upper portion of the door portion 72. Thus, the lever 75 is located above the door portion 72, so that the operator can open and close the external cover 71 while being in the control portion 7 (see FIG. 1), and clean the radiator from the control portion 7. be able to.

  The lever 75 is provided to extend to the lower edge of the door portion 72 along the outer peripheral edge on the front side of the door portion 72 in a state where the external cover 71 is attached. That is, the lever 75 also functions as a reinforcing member on the outer periphery of the door portion 72. Thereby, the distortion of the door part 72 etc. which arise by the force applied when opening and closing the external cover 71 can be prevented.

  As shown in FIG. 11, the radiator cover 70 and the front end portion (region C) of the door portion 72 are provided with a lock mechanism that locks the external cover 71 in a closed state with respect to the radiator cover 70. The lock mechanism will be described later with reference to FIG.

  A rotation shaft (hereinafter, referred to as a “rotation pin”) 76 serves as a rotation fulcrum when the door portion 72 is opened and closed, and is positioned below the edge on the rear side of the door portion 72 with the door portion 72 attached to the machine body. It protrudes toward the side. A plurality (for example, two) of rotation pins 76 are provided along the edge of the door portion 72.

  The attachment stay 77 is provided on the rear edge of the radiator cover 70. The stay main body 78 of the mounting stay 77 is formed with an insertion hole 79 along the vertical direction through which the rotation pin 76 is inserted. The attachment stay 77 supports the door 72 so that it can be opened and closed by inserting the rotation pin 76 through the insertion hole 79. Further, the attachment stay 77 is provided at a position corresponding to the rotation pin 76 when the door portion 72 is attached at the edge of the radiator cover 70.

  According to such a configuration, since the radiator cover 70 is further provided with the external cover 71, the external cover 71 can be opened and closed during operations such as cutting and threshing, so that the mesh of the external cover 71 is removed. can do. Further, by removing the mesh clogging more frequently, it is possible to suppress a decrease in the cooling function of the radiator. Heretofore, only the radiator cover 70 has been provided with a cover function, so that the operation is interrupted and the mesh of the radiator cover 70 is removed.

  Moreover, the upper window part 73a and the lower window part 73b have substantially the same area, and external air can be evenly introduced from the upper window part 73a and the lower window part 73b. As a result, the wind is evenly applied to the radiator. In addition, since the upper window part 73a and the lower window part 73b are substantially the same area, it looks good also in design.

  The radiator cover 70 is of a fixed type. For example, when the external cover 71 is attached in place of the openable radiator cover, the mounting stay 77 is shared by the radiator cover (openable type) and the external cover 71. May be. According to such a configuration, the external cover can be attached to the conventional machine simply by replacing the attachment stay 77. Note that the attachment stay 77 may be replaced when returning to the original state. Further, the rotation shaft 76 of the outer cover 71 is not displaced.

  In addition, since the pivot fulcrum of the radiator cover (openable / closable) and the outer cover 71 is on the same axis, it is possible to prevent the radiator cover and the outer cover 71 from interfering during cleaning or the like. For this reason, the effort concerning cleaning etc. can be reduced. Even when the radiator cover is fixed and only the outer cover 71 can be opened and closed, the distance between the outer cover 71 and the radiator cover is constant, so that they do not interfere with each other.

  In the present embodiment, the external cover 71 has a rotational fulcrum at the rear and opens laterally. However, the external cover 71 has a rotational fulcrum on the upper side or a rotational fulcrum on the lower side. It may have and open vertically. Moreover, the outer cover 71 may have a rotational fulcrum in front and open laterally, for example. Even in such a configuration, since the radiator cover 70 is further provided with the external cover 71, the external cover 71 can be opened and closed during operations such as cutting and threshing, so that the mesh of the external cover 71 is removed. be able to. Further, by removing the mesh clogging more frequently, it is possible to suppress a decrease in the cooling function of the radiator.

<Lock mechanism of external cover 71>
Here, the lock mechanism of the outer cover 71 will be described with reference to FIG. FIG. 13 is an explanatory operation diagram illustrating the locking operation of the locking mechanism of the external cover 71. FIG. 13 shows a front view of the radiator cover 70 and the external cover 71. As shown in FIG. 13, a locking mechanism is provided at the front edges of the radiator cover 70 and the external cover 71.

  As shown in FIG. 13, the lock portion 80 constituting the lock mechanism includes a fixed portion 81 provided on the radiator cover 70 side and a movable portion 82 provided on the external cover 71 side. The fixing portion 81 includes a fixing pin 83 (first fixing pin) that protrudes forward from an end surface on the front side (front side) of the radiator cover 70. The movable part 82 includes a lock stay 84, a movable pin 85, and a fixing pin 86 (second fixing pin). The lock stay 84 is formed in a plate shape, and a movable slit 87 and a fixing slit 88 are formed on the surface thereof.

  The movable slit 87 is continuous with the long slit portion 87a formed along the longitudinal direction of the lock stay 84 and the end of the long slit portion 87a, and is a short slit formed substantially orthogonal to the long slit portion 87a. It has a slit portion 87b and is formed in a substantially L shape. Note that the length of the long slit portion 87a is substantially equal to the distance between the first fixing pin 83 and the movable pin 85. The fixing slit 88 is formed in a cutout shape at the end of the lock stay 84 opposite to the movable slit 87.

  The fixing slit 88 is continuous from the long side of the lock stay 84 and is formed in parallel with the short slit portion 87b of the movable slit 87, and the long slit of the movable slit 87 is continuous from the inlet portion 88a. A long slit portion 88b formed on the longitudinal extension of the portion 87a, and a short slit portion 88c that is continuous from the end of the long slit portion 88b and substantially orthogonal to the long slit portion 88b. And formed in a substantially Z-shape.

  As shown at the top of FIG. 13 (first from the top), the lock stay 84 has the movable pin 85 positioned in the short slit portion 87b of the movable slit 87 and the second fixing pin 86 for fixing. By being positioned in the short slit portion 88 c of the slit 88, the storage posture is integrated with the external cover 71.

  As shown in the second from the top in FIG. 13, when the outer cover 71 is locked to the radiator cover 70 by the lock portion 80, the movable pin 85 first sets the long slit portion 87 a of the movable slit 87. By sliding, the lock stay 84 is slid so that the distal end side of the lock stay 84 passes between the movable pin 85 and the first fixing pin 83.

  Next, as shown in FIG. 13 from the top, the movable pin 85 slides on the long slit portion 87a of the movable slit 87, so that the inlet portion 88a of the fixing slit 88 is first fixed. In accordance with the position of the pin 83, the lock stay 84 is rotated using the movable pin 85 as a fulcrum.

  Next, as shown at the bottom (fourth from the top) in FIG. 13, the movable pin 85 is positioned in the short slit portion 87 b of the movable slit 87, and the first fixing pin 83 is the fixing slit 88. The lock stay 84 is in a locked state by being positioned in the short slit portion 88 c, and locks the outer cover 71 with respect to the radiator cover 70. Since the lock unit 80 is in an oblique posture in the locked state, the lock stay 84 is locked by its own weight and can be automatically locked.

  Further, in the lock portion 80, in the locked state, since the tip end side of the lock stay 84 is in an inclined posture, the lock stay 84 is unlikely to come off, and unintentional release can be prevented. In order to release the lock state of the lock stay 84, it is only necessary to lift the tip end side of the lock stay 84.

  The fixed portion 81 and the movable portion 82 may be provided in reverse. That is, the movable part 82 may be provided on the radiator cover 70 side, and the fixed part 81 may be provided on the external cover 71 side. In addition, although the above-described lock portion 80 is mechanically locked, for example, the fixing portion 81 in the lock portion 80 may be configured with a magnet. According to such a configuration, locking and unlocking can be easily performed.

  Further effects and modifications can be easily derived by those skilled in the art. Thus, the broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications can be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

DESCRIPTION OF SYMBOLS 1 Combine 2 Airframe frame 3 Traveling device 3a Crawler belt 3b Drive wheel 3c Tension wheel 4 Mowing device 4a Weeding shear 4b Pulling device 5 Grain feeding device 6 Threshing device 7 Control part (cabin)
8 Glen tank 9 Grain discharge auger 10 Vertical auger 11 Takeover member (takeover metal)
11a Inflow surface 11b Outflow surface 12 Mounting member 12a Leg portion 13 Support frame 14 Base portion 20 Engine 21 Exhaust manifold 22 Exhaust pipe 25 Engine room 30 Exhaust gas purification device 31 DPF
32 Urea SCR catalyst 321 Exhaust pipe 33 Dosing module (DM)
34 Supply Module (SM)
35 Concave portion 40 Urea water tank 41 Water supply port 42 Sensor unit 50 Exhaust pipe (tail pipe)
51a Exhaust pipe member 51b Exhaust pipe member 52 surface 53 Joint surface 54a Exhaust pipe member 54b Exhaust pipe member 55 Exhaust port 60 Track roller frame 61 Rolling wheel 62 Plate 63 Reinforcement plate 63a Wall (front wall)
63b Wall (rear wall)
64 Reinforcement member 64a Top plate portion 65 Shaft portion 66 Reinforcement member (reinforcement plate)
70 Radiator cover 71 External cover 72 Door part 73a Upper window part 73b Lower window part 74 Frame 75 Lever 76 Rotating shaft (Rotating pin)
77 Mounting stay 78 Stay main body 79 Insertion hole 80 Locking part 81 Fixing part 82 Movable part 83 Fixing pin (first fixing pin)
84 Lock stay 85 Movable pin 86 Fixing pin (second fixing pin)
87 Moving slit 87a Long slit 87b Short slit 88 Fixed slit 88a Inlet part 88b Long slit 88c Short slit

In order to solve the above-described problems and achieve the object, the invention according to claim 1 is provided with a grain tank for storing grains on the upper left and right sides of the body frame on which the engine is installed. A urea SCR catalyst for reducing and purifying the exhaust gas of the engine using ammonia generated from urea water in a combine provided with a vertical auger that conveys grains stored in the Glen tank upward An exhaust gas purification device including a urea water tank for storing urea water to be supplied to the urea SCR catalyst is provided between the grain tank and the vertical auger on the body frame , and at least one of the urea water tanks Is inserted into a recess formed on the rear surface of the Glen tank, and a urea water SCR catalyst is fed to the rear portion of the fuselage frame. An attachment member to which the module is attached is provided, the attachment member is provided behind the Glen tank, the supply module is attached to the front side of the attachment member, and the urea water tank is attached to the rear side of the attachment member. The supply module can be disposed in the concave portion together with the front portion of the urea water tank, and the Glen tank is configured to rotate outward from the machine body about the vertical axis, and the Glen tank is centered on the vertical axis. The urea water tank, together with the supply module, comes out of the recess of the grain tank and remains on the fuselage side without interfering with the grain tank, and accommodates the engine. A radiator cover is provided to cover the outside of the radiator disposed in the engine room. A laterally open outer cover that covers an outer portion of the radiator cover is provided, and a lock mechanism that locks the outer cover in a closed state with respect to the radiator cover is provided. A movable pin, a movable pin, and a second fixing pin, the movable slit being provided with a fixing pin, and a movable slit and a fixing slit formed on the outer cover side; Has a first long slit portion formed along the longitudinal direction of the lock stay, and a first short slit portion formed substantially perpendicularly from an end of the first long slit portion, and is substantially L-shaped. The fixing slit is continuous from the long side of the lock stay and is formed in parallel with the first short slit portion of the movable slit, and from the inlet portion. A second long slit portion that is continuous and formed on an extension line in the longitudinal direction of the first long slit portion of the movable slit, and is substantially orthogonal to the second long slit portion from the end of the second long slit portion. The lock stay is formed in a substantially Z shape, and the lock stay has the movable pin positioned at the first short slit portion of the movable slit, and the second The fixing pin is positioned in the second short slit portion of the fixing slit, so that the lock stay is integrated with the outer cover, and the movable pin is in the movable slit. located in the first short slits, said that the first locking pin is positioned at the second short slit portion of the fixing slits, characterized in that the lock stay is locked in the inclined posture by its own weight And combine that.

According to the first aspect of the present invention, it is possible to arrange the urea water tank while suppressing an increase in the size of the airframe and suppressing a decrease in the capacity of the Glen tank. In addition, since the urea water tank is arranged at the rear part of the fuselage, the urea water tank can be easily supplied compared to the case where the urea water tank is arranged at the central part of the fuselage, thereby improving the accessibility to the urea water tank. be able to. In addition, by inserting at least a part of the urea water tank into the recess formed in the rear surface of the glen tank, the space between the glen tank and the vertical auger is reduced to make the aircraft compact, while reducing the capacity of the urea water tank. Can be set large. In addition, for example, when the Glen tank is configured to rotate outwardly of the fuselage about the vertical axis, the urea water tank escapes from the recess on the rear surface of the Glen tank and remains on the fuselage side. Piping to the SCR catalyst side can be simplified. Further, since the supply module is arranged away from the body frame, it is possible to suppress the vibration from the vibration source being transmitted to the supply module, and it is possible to suppress the damage of the supply module. Further, since the supply module is arranged away from the exhaust gas purification device, the supply module is not easily affected by the heat generated from the exhaust gas purification device. In addition, since the lock stay is in an oblique posture in the lock state in the lock mechanism, the lock stay is locked by its own weight and can be automatically locked, and the lock stay is difficult to come off, and the external cover is unintentionally opened. Can be prevented.

Claims (5)

A grain tank for storing grains is provided on one of the upper left and right sides of the machine frame where the engine is installed, and a vertical auger is provided behind the grain tank to convey the grains stored in the grain tank upward. In the combine,
An exhaust gas purifying apparatus including a urea SCR catalyst for reducing and purifying the exhaust gas of the engine using ammonia generated from urea water is provided,
A combine water tank for storing urea water to be supplied to the urea SCR catalyst is provided between the Glen tank and the vertical auger on the machine frame. The aircraft frame supports the vertical auger and is attached with a takeover member that takes over the grain conveyed backward from the grain tank to the vertical auger,
The combine according to claim 1, wherein the urea water tank is arranged above the takeover member. The takeover member has an inflow surface into which the grain conveyed toward the rear from the Glen tank flows,
A support frame fixed to the inflow surface portion of the takeover member;
The combine of Claim 2 which provided the base part which arrange | positions the said urea water tank in the said support frame.   The combine according to any one of claims 1 to 3, wherein the urea water tank is disposed such that a water supply port of urea water faces an outer side of the body.   The combine according to any one of claims 1 to 4, wherein at least a part of the urea water tank enters a recess formed in a rear surface of the Glen tank.

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