JP6807763B2 - combine - Google Patents

Description

The present invention relates to a combine including an engine and an exhaust gas treatment device for purifying and treating exhaust gas from the engine.

Conventionally, as the exhaust gas treatment device, an exhaust gas treatment device using selective catalytic reduction (SCR) is provided, and this exhaust gas treatment device has a bellows-like structure such as a bellows type exhaust pipe and is configured to be expandable and contractible. It is connected to the exhaust gas exhaust part of the engine via the communication connection pipe. Then, the engine is supported by the airframe frame via a rubber mount mechanism which is an elastic support, and the exhaust gas treatment device is fixed in position by bolt connection to a support column as a vertical frame body fixed to the airframe. It was supported in the state (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-168975

In the combine, the engine is supported by the body frame via an elastic support such as rubber as described above so that the vibration caused by the operation of the engine is not transmitted to the driver's seat and other devices.
Further, the engine and the exhaust gas treatment device are connected via a communication connection pipe which is bellows-shaped and is configured to be expandable and contractible, and even if the engine vibrates due to the operation operation, the axial direction of the communication connection pipe Vibration can be absorbed by the expansion and contraction operation along the above, so that the vibration is not directly transmitted to the exhaust gas treatment device.

However, when the engine, exhaust gas treatment device, etc. are assembled and the communication connection pipe having the bellows-like structure as described above is distorted, the expansion and contraction operation due to the vibration of the engine is repeated. , There is a risk of early damage due to that. Such assembly distortion is caused by a relative error during assembly between the engine and the exhaust gas treatment device.

In the above-mentioned conventional configuration, since the engine and the exhaust gas treatment device are supported in a state where the positions are fixed with respect to the airframe frame, the above-mentioned assembly distortion may occur due to the influence of the position accuracy at the time of assembly. There is a disadvantage that the durability of the connecting member such as the communication connecting pipe as described above is lowered. By the way, the engine is supported by the airframe frame via an elastic support, and the support position is determined after the assembly work is completed, but in such an engine support structure, it is finally determined. Positional deviation of the support position is likely to occur.

Therefore, it has been desired to improve the durability of the members for connection between the engine and the exhaust gas treatment device.

The characteristic configuration of the combine according to the present invention is
The engine supported by the fuselage frame and
A first exhaust gas treatment device having a diesel particulate filter that collects diesel particulates and reducing diesel particulates contained in the exhaust gas from the engine .
A second exhaust gas treatment device that reduces nitrogen oxides contained in the exhaust gas after being treated by the first exhaust gas treatment device by utilizing selective catalyst reduction is provided.
The second exhaust gas treatment device is connected to the first exhaust gas treatment device via a communication connection pipe.
The engine is supported by the airframe frame via an elastic support.
The first exhaust gas treatment device is supported by the engine and is supported by the engine.
The second exhaust gas treatment device is supported by the airframe frame.
Lies in the changes adjustable positioning Organization supporting position is provided for the body frame of the second exhaust gas treatment device.

According to the present invention, even though the assembling work is completed, by changing and adjusting the support position of the exhaust gas treatment device with respect to the airframe, the assembling distortion does not occur in the communication connection pipe and other members. The relative position between the engine and the exhaust gas treatment device can be changed.

Therefore, it is possible to avoid the occurrence of assembly distortion due to the influence of the position accuracy at the time of assembly for the connecting member such as the communication connection pipe, and there is a risk that it will be damaged early after short-term use. It has become possible to improve the durability of the members for connection between the engine and the exhaust gas treatment device.
Further, according to this configuration, the exhaust gas from the engine is purified by the first exhaust gas treatment device and then further purified by the second exhaust gas treatment device. In this way, harmful substances contained in the exhaust gas, such as nitrogen oxides (NOx) and fine particulate matter (PM), can be removed by the two-step purification treatment.
Then, for example, in the case of a configuration in which the engine and the first exhaust gas treatment device move relative to each other, the support position of the first exhaust gas treatment device with respect to the airframe can be changed and adjusted so that the engine and the first exhaust gas treatment device can be adjusted. It is possible to prevent premature damage to the connecting member that connects to and from. Further, if the configuration is such that the engine and the second exhaust gas treatment device move relative to each other, the support position of the second exhaust gas treatment device with respect to the airframe can be changed and adjusted so that the engine can be moved via the first exhaust gas treatment device. It is possible to prevent premature damage to the connecting member that connects the second exhaust gas treatment device and the second exhaust gas treatment device. Further, if the first exhaust gas treatment device and the second exhaust gas treatment device each move relative to the engine, the support positions of the first exhaust gas treatment device and the second exhaust gas treatment device with respect to the body frame are changed. By making it adjustable, it is possible to prevent premature damage to the connecting member connecting the engine and the first exhaust gas treatment device and between the first exhaust gas treatment device and the second exhaust gas treatment device.

In the present invention, it is preferable that the position adjusting mechanism can change and adjust the support position in the horizontal direction.

According to this configuration, since the exhaust gas treatment device is moved in the horizontal direction to change the support position, it is possible to move the exhaust gas treatment device in the horizontal direction while supporting the load, for example, the position in the vertical direction. The position adjustment work can be performed more easily than the adjustment configuration.

In the present invention, the airframe frame is provided with a vertically oriented frame body extending in the vertical direction, and the vertically oriented frame body is provided with an upper support portion located on the upper side and a lower support portion located on the lower side. Therefore, it is preferable that the second exhaust gas treatment device is supported by the vertically oriented frame body via the position adjusting mechanism in each of the upper support portion and the lower support portion.

According to this configuration, the exhaust gas treatment device can be stably supported at the upper and lower side locations, and the support position of the exhaust gas treatment device can be changed at each of the upper and lower side support portions. The support position with respect to the aircraft frame can be adjusted without changing the vertical posture of the.

In the present invention, the upper supported portion that is placed and supported on the upper support portion and the lower portion that is supported by sandwiching the lower support portion from both lateral and outer sides to the second exhaust gas treatment device. It is preferable that a side supported portion is provided.

According to this configuration, since the upper supported portion is placed and supported on the upper support portion, the load of the exhaust gas treatment device can be received and supported. Since the lower supported portion is supported in a state where the lower supported portion is sandwiched and affixed from both laterally outer sides, it is possible to prevent the exhaust gas treatment device from being displaced in the lateral direction.

As a result, it is possible to support the exhaust gas treatment device in a stable state by suppressing the occurrence of rattling due to the configuration in which the position can be changed and adjusted while satisfactorily receiving and supporting the load.

In the present invention, the mounting support portion that is mounted and supported on the mounting surface of the upper support portion and the lateral guide surface of the upper support portion are abutted from the lateral side on the upper supported portion. It is preferable that a lateral support portion supported by is provided.

According to this configuration, the upper supported portion receives and supports the load of the exhaust gas treatment device by mounting and supporting the mounting support portion on the mounting surface of the upper supporting portion, and also supports the lateral support portion. Is in contact with the lateral guide surface of the upper support portion from the lateral side, so that the positional deviation in the lateral direction can be prevented.

Therefore, not only the lower supported portion but also the upper supported portion prevents the displacement in the lateral direction, so that the exhaust gas treatment device can be supported in a stable state with less rattling as a whole.

In the present invention, it is preferable that the position adjusting mechanism is provided with a shaft member extending in a direction intersecting the position changing direction and an elongated hole through which the shaft member is inserted and extending along the position changing direction. is there.

According to this configuration, the support position of the exhaust gas treatment device can be changed and adjusted by a position adjusting mechanism having a simple structure of a shaft member and a long hole through which the shaft member is inserted.

In the present invention, it is preferable that the first exhaust gas treatment device is provided inside the engine bonnet that covers the upper part of the engine.

In the present invention, it is preferable that the second exhaust gas treatment device is provided outside the engine bonnet that covers the upper part of the engine.

In the present invention, the grain tank for storing grains is formed in a downward constriction shape when viewed from the front, and a recessed portion is recessed inwardly into the bottom inclined surface of the downward constriction shape. It is preferable that the second exhaust gas treatment device is formed and located below the front portion of the grain tank.
In the present invention, it is preferable that the second exhaust gas treatment device is supported by the airframe frame in a state of being inserted into the recessed portion.
In the present invention, it is preferable that the communication connection pipe is connected to the exhaust gas outlet portion of the first exhaust gas treatment device and is connected to the exhaust gas supply portion of the second exhaust gas treatment device.

It is an overall side view of a combine. It is the whole plan view of the combine. It is a cross-sectional plan view of the front part of the combine. It is a perspective view which shows the structure around an engine. It is a vertical sectional side view which shows the structure around an engine. It is an exploded perspective view which shows the support structure of the 2nd exhaust gas treatment apparatus. It is an exploded perspective view which shows the support structure of the 2nd exhaust gas treatment apparatus. It is an exploded perspective view of a heat shield cover. It is a vertical sectional side view of the connection part between a heat shield cover and a cover member. It is a vertical sectional rear view of the connection part between a heat shield cover and a cover member.

Hereinafter, a case where the embodiment of the present invention is applied to a head-feeding combine will be described with reference to the drawings.

〔overall structure〕
As shown in FIGS. 1 and 2, the combine according to the present invention is provided with a cutting section 2 for cutting planted culms at the front portion of a traveling machine that is self-propelled by a pair of left and right crawler traveling devices 1 and 1. .. A driving unit 4 whose circumference is covered with a cabin 3 is provided on the right side of the front part of the traveling machine body, and a threshing device 5 for threshing the grain culms cut by the cutting section 2 and threshing are provided at the rear part of the traveling machine body. A grain tank 6 for storing grains obtained by the treatment is provided in a state of being lined up in the horizontal direction. The driving unit 8 is provided in a state of being located below the driver's seat 7 in the driving unit 4 of the traveling machine body, and the unloader 9 for discharging the grains stored in the grain tank 6 to the outside of the machine is provided.

In this embodiment, when defining the front-rear direction of the aircraft, it is defined along the traveling direction of the aircraft in the working state, and when defining the left-right direction of the aircraft, the left and right are defined as viewed in the traveling direction of the aircraft. .. That is, the direction indicated by the reference numeral (F) in FIGS. 1 and 2 is the front side of the machine body, and the direction indicated by the reference numeral (B) in FIGS. 1 and 2 is the rear side of the machine body. The direction indicated by the reference numeral (L) in FIG. 2 is the left side of the aircraft, and the direction indicated by the reference numeral (R) in FIG. 2 is the right side of the aircraft.

The cutting unit 2 was raised by a weeding tool 10 that guides the root of the planted culm to be harvested, and a plurality of raising devices 11 that cause the planted culm to be harvested in a vertical position. Varican-type cutting device 12 that cuts the root of the planted culm, and vertical transportation that transports the harvested culm backward while changing the posture so that it gradually changes from the vertical position to the sideways position and supplies it to the grain removal device 5. The device 13 and the like are provided.

The threshing device 5 supplies the tip side to the handling chamber 14 to perform threshing processing while sandwiching the stock root side of the supplied harvested culm by the threshing feed chain 5a and the holding rail 5b and transporting it toward the rear of the machine body. .. As shown in FIG. 2, inside the handling chamber 14, a handling cylinder 15 that is rotationally driven around the front-rear axis, an arc-shaped receiving net (not shown) along the outer circumference on the lower side thereof, etc. In preparation for this, the tip side of the cut grain culm is handled by the handling cylinder 15 and the receiving net to perform the threshing process.

The processed product after the threshing treatment is sorted into grains, straw scraps, etc. by the lower sorting section (not shown). The grains are carried out to the outside on the right side of the threshing device 5 by a first-class transport screw (not shown), and then lifted by a grain-lifting conveyor 16 and transported to the inside of the grain tank 6. The grain tank 6 stores grains sent from the threshing device 5. After that, the grains stored in the grain tank 6 are carried out by the unloader 9.

As shown in FIGS. 1 and 2, the unloader 9 is a vertical feed screw conveyor 9A that vertically feeds the grains conveyed by the bottom screw provided at the bottom of the grain tank 6 in a front-rear orientation posture. And a horizontal feed screw conveyor 9B which is connected to the upper part of the vertical feed screw conveyor 9A and laterally feeds the grains to the discharge port 17 at the tip.

[Opening and closing structure around the driver]
As shown in FIG. 2, the driver unit 4 is attached to the driver seat 7, the front panel 18 located in front of the driver seat 7, the floor portion 19 located between the front panel 18 and the driver seat 7, and the driver seat 7. On the other hand, it is provided with a side panel 20 or the like located inside (left side) in the left-right direction of the machine. The upper side of the driving unit 4 is covered with the cabin 3. The driver's seat 7 is supported on the upper part of the engine bonnet 22 that covers the upper part of the diesel type engine 21 provided in the driving unit 8.

As shown in FIG. 3, the engine bonnet 22 is connected to the front plate portion 22a located on the front side of the fuselage of the engine 21, the upper surface portion 22b located on the upper side of the fuselage of the engine 21, and the driver's seat behind the upper surface portion 22b. An engine room is formed by including an air supply chamber component 22c and the like formed behind the 7.

As shown in FIGS. 2 and 3, the engine bonnet 22, the front panel 18, the side panel 20, the floor portion 19, the driver's seat 7, the cabin 3 and the like are integrally connected to form the driver's unit structure 23. The driver structure 23 is rotatably supported by the machine frame 24 around the upper and lower axis Y1 on the left rear side of the driver seat 7.

Next, the rotation support structure of the operation unit structure 23 will be described.
As shown in FIGS. 4 and 5, a cylindrical vertical frame body 25 extending in the vertical direction is provided on the machine body frame 24 at a portion on the left rear side of the driving unit 4. On the other hand, a rotation fulcrum member 27 extending in the vertical direction is integrally connected to a left side portion of the back portion of the driving portion structure 23 via an arm portion 26. The rotation fulcrum member 27 is mounted on the support shaft portion 28 provided at the upper end portion of the vertically oriented frame body 25 in a state of being externally fitted from above, and is rotatably supported around the vertical shaft core Y1. The upper end of the rotating fulcrum member 27 is rotatably supported by a bracket 29 connected to the lateral side wall of the threshing device 5.

As shown by the solid line in FIG. 2, the driving unit structure 23 rotates around the vertical axis Y1 and is located on the side of the machine body so as to cover the upper part of the driving unit 8. As shown by the alternate long and short dash line, the attitude can be switched over to the overhanging posture overhanging to the outside of the machine body so as to open the upper part of the prime mover 8. By switching the driving unit structure 23 to the overhanging posture, the upper part of the driving unit 8 is greatly opened, so that the maintenance work of the driving unit 8 can be easily performed.

The grain tank 6 is swingably supported by the machine frame 24 around the vertical shaft core Y2, which is the rotation shaft core of the vertical feed screw conveyor 9A. The grain tank 6 swings around the vertical axis Y2 to retreat toward the inside of the machine (the state shown by the solid line in FIG. 2) and to extend to the outside of the machine for maintenance. The position can be changed over the position (state shown by the virtual line in FIG. 2). When switching the operation unit structure 23 to the overhanging posture, it is necessary to change the position of the grain tank 6 to the maintenance position.

[Configuration around the engine]
As shown in FIGS. 2 to 5, the prime mover 8 is provided with an engine 21, and the engine 21 is mounted in a lateral direction of the airframe in the crankshaft direction via a rubber mount mechanism 30 as an elastic support. It is supported by the airframe frame 24.

As an exhaust gas treatment device for purifying the exhaust gas of the engine 21, the first exhaust gas treatment device 31 for reducing particulate matter contained in the exhaust gas of the engine 21 and the first exhaust gas treatment device 31 after the treatment are performed. A second exhaust gas treatment device 32 that reduces nitrogen oxides contained in the exhaust gas is provided.

The first exhaust gas treatment device 31 includes a diesel particulate filter (DPF) (not shown), which is a known technique for collecting diesel particulates contained in exhaust gas, and reduces diesel particulates by passing the exhaust gas.

The second exhaust gas treatment device 32 purifies the exhaust gas by utilizing selective catalytic reduction (SCR), which is a known technique. Specifically, urea water, which is an example of a reducing agent, is injected into exhaust gas and hydrolyzed to generate ammonia, and the ammonia (NH ₃ ) and nitrogen oxides (NOx) contained in the exhaust gas are chemically reacted. The nitrogen oxides contained in the exhaust gas are reduced by reducing the nitrogen (N ₂ ) and water (H ₂ O).

The exhaust gas discharged from the engine 21 is purified by the first exhaust gas treatment device 31 to reduce diesel particulates, and then by the second exhaust gas treatment device 32 to reduce nitrogen oxides contained in the exhaust gas. The exhaust gas that has been treated and has been purified is discharged to the outside of the machine body through the exhaust pipe 33.

An exhaust pipe 33 is provided for exhausting the exhaust gas discharged from the exhaust gas outlet on the upper side of the main body processing unit 32B in the second exhaust gas treatment device 32 to the outside.

The exhaust pipe 33 is an exhaust gas outlet portion of the second exhaust gas treatment device 32 so that the exhaust port 42 as an exhaust port is located above the upper end of the threshing device 5 between the threshing device 5 and the grain tank 6. It extends from the back to the upper end side of the threshing device 5 in an inclined posture. An exhaust port 42 is formed at the upper end of the exhaust pipe 33, and the upper end of the exhaust pipe 33 is extended so as to bend toward the threshing device 5.

The exhaust pipe 33 includes an exhaust gas outflow pipe 36 extending from the exhaust gas outlet portion 35, an intermediate exhaust pipe 37 connected to the exhaust gas outflow pipe 36, and a terminal side exhaust pipe 38 connected to the intermediate exhaust pipe 37. The intermediate exhaust pipe 37 extends from the outlet portion of the exhaust gas outflow pipe 36 to a position corresponding to the upper end portion of the threshing device 5 in a rearward inclined posture. The end-side exhaust pipe 38 extends toward the threshing device 5 side in a curved state with respect to the intermediate exhaust pipe 37.

The intermediate exhaust pipe 37 is covered with a cover member 39 having a substantially U-shaped cross section. The cover member 39 is bolted to the outer peripheral surface of the intermediate exhaust pipe 37 via a bracket. The lower end portion of the cover member 39 is provided so as to be close to the heat shield cover 41, which will be described later, in a vertically overlapping state.

The end-side exhaust pipe 38 is formed of a cylindrical body having a substantially circular cross section, and is extended so as to bend in a curved shape toward the threshing device 5 side as it goes upward in the front-rear direction of the machine. An exhaust port 42 for discharging the exhaust gas into the air is formed on the end surface of the tip end portion of the exhaust pipe 38 on the terminal side.

[Support structure for exhaust gas treatment equipment]
As shown in FIGS. 3 and 5, the first exhaust gas treatment device 31 is arranged inside the engine bonnet 22. That is, they are arranged in a state of being biased to the left side of the fuselage with respect to the driver's seat 7, below the side panel 20 and at an inward position in the width direction of the fuselage in the upper part of the engine 21, with the longitudinal direction along the front-rear direction of the fuselage. .. The first exhaust gas treatment device 31 is integrally connected to and supported by the engine 21 by a pair of support portions 43 and 44 on both front and rear sides of the machine body.

An exhaust gas introduction port 45 is provided in a lower portion of the first exhaust gas treatment device 31 on the front side of the machine body, and the exhaust gas introduction port 45 is connected to the engine 21. As shown in FIG. 5, an exhaust gas outlet portion 47 is provided on the right side of the first exhaust gas treatment device 31 on the rear side of the machine body.

As shown in FIG. 5, the second exhaust gas treatment device 32 is provided outside the engine bonnet 22 and is located on the rear side of the machine body of the operation unit 4 in a plan view. The second exhaust gas treatment device 32 is located below the front portion of the grain tank 6 and is arranged so as to overlap the grain tank 6 in a plan view. Although not shown, the grain tank 6 is formed in a downwardly constricted shape when viewed from the front, and a recessed portion 48 (FIG. 6) is formed in a downwardly constricted shape and is recessed inwardly toward the inward side of the lower constricted bottom inclined surface. 3) is formed. The second exhaust gas treatment device 32 is deployed in a state of being inserted into the recessed portion 48.

As shown in FIGS. 3 and 5, the second exhaust gas treatment device 32 is supplied from the dosing unit 32A, in which urea water is injected and supplied to the exhaust gas supplied from the first exhaust gas treatment device 31, and the dosing unit 32A. It is provided with a main body processing unit 32B that performs reduction processing of exhaust gas.

The dosing portion 32A has a cylindrical shape, and the main body processing portion 32B has a cylindrical shape having a larger diameter than the dosing portion 32A. The dosing unit 32A and the main body processing unit 32B are integrally connected at each lower portion, and are communicated with each other so that the exhaust gas jet-supplied with urea water by the dosing unit 32A is supplied to the main body processing unit 32B. The main body processing unit 32B is arranged so that the direction along the central axis of the cylindrical shape is along the vertical direction of the machine body. The cylindrical dosing portion 32A is located on the right side of the machine body with respect to the main body processing part 32B, is arranged in parallel with the main body processing part 32B, and is arranged in a posture in which the direction along the central axis of the cylindrical shape is along the vertical direction of the machine body. Has been done.

As shown in FIG. 4, the exhaust gas outlet portion of the first exhaust gas treatment device 31 and the exhaust gas supply portion of the second exhaust gas treatment device 32 are communicated and connected via a communication connection pipe 53 as a connection member. The communication connection pipe 53 is flange-connected to the exhaust gas outlet portion of the first exhaust gas treatment device 31 and flange-connected to the exhaust gas supply portion of the second exhaust gas treatment device 32.

The communication connecting pipe 53 includes a flexible bellows-shaped bellows pipe 53A, and has a structure that can be expanded and contracted in the longitudinal direction. By expanding and contracting the bellows pipe 53A, it is possible to absorb the vibration of the engine 21 supported by the body frame 24 via the rubber mount, and prevent the vibration of the engine 21 from being transmitted to the second exhaust gas treatment device 32. , The second exhaust gas treatment device 32 can be supported in a stable state.

As shown in FIG. 4, a urea water tank 54 for storing urea water as a reducing agent to be supplied to the second exhaust gas treatment device 32 is provided on the lower side of the floor portion 19 of the operation unit 4. The urea water tank 54 is supported by the airframe frame 24. The urea water in the urea water tank 54 is supplied to the second exhaust gas treatment device 32 through the pipe 56 by the pump 55. The urea water left over without being injected is returned to the urea water tank 54.

Next, the support structure of the second exhaust gas treatment device 32 will be described.
The second exhaust gas treatment device 32 is supported by a vertical frame body 25 that rotatably supports the operation unit structure 23. As shown in FIG. 7, the vertical frame body 25 includes an upper support portion 57 located on the upper side and a lower support portion 58 located on the lower side. The second exhaust gas treatment device 32 is supported by the upper supported portion 59 which is placed and supported on the upper support portion 57 and the lower supported portion 58 which is supported by sandwiching the lower support portion 58 from both lateral and outer sides. It has 60 and.

The upper support portion 57 includes a connecting bracket 61 integrally connected to the upper side of the vertically oriented frame body 25, and a vertically oriented plate portion 62 integrally connected to the upper portion of the connecting bracket 61. The connecting bracket 61 is formed in a substantially L-shaped cross section when viewed from the side, and extends in the lateral direction.

As shown in FIG. 7, the vertically oriented plate portion 62 includes a substantially U-shaped plate portion main body 63 in a plan view and a substantially U-shaped frame portion forming body 64 in a plan view connected to the front side of the plate portion main body 63. , A pair of reinforcing plates 65 connected to the rear side of the plate portion main body 63, two welding bolts 66 integrally connected to the connection portion between the plate portion main body 63 and the frame portion forming body 64, and the plate portion. It is provided with a welding nut 67 connected to the back surface side of the lateral one side portion of the main body 63. The two welding bolts 66 are provided so as to project upward from the upper end edge of the plate portion main body 63. A bolt insertion hole 68 is formed on the lateral side of the plate body 63 provided with the welding nut 67.

As shown in FIGS. 6 and 7, the upper supported portion 59 is bolted to the upper flange portion 50 provided on the outer peripheral portion on the upper side of the main body processing portion 32B and the lower side of the upper flange portion 50 in a fixed position. It is provided with a connected upper connecting member 69. The upper flange portion 50 is integrally provided on the outer peripheral portion of the main body processing portion 32B in a state of projecting outward in the radial direction. The upper connecting member 69 is provided on the lower surface of the horizontal mounting support portion 70 which is bolted to the upper flange portion 50 from below and the lateral one side end portion of the mounting support portion 70. It is provided with a horizontal support portion 71 in a vertical orientation.

The mounting support portion 70 is formed with bolt holes 73 through which bolts Bo for connecting to the upper flange portion 50 are inserted, and two insertion holes 74 through which two welding bolts 66 are inserted. The lateral support portion 71 is formed with one insertion hole 75 through which a connecting bolt Bo is inserted.

The lower support portion 58 includes a connecting bracket 76 integrally connected to the lower side of the vertically oriented frame body 25, and side plates 77 integrally connected to both side ends of the connecting bracket 76.
The connecting bracket 76 is formed in a substantially U-shaped cross section when viewed from the side, and extends in the lateral direction. The side plates 77 are connected inward at both side ends of the connecting bracket 76 so as to close the portion surrounded by a substantially U shape. Bolt holes 78 through which bolts Bo are inserted are formed in the pair of side plates 77, respectively.

As shown in FIGS. 6 and 7, the lower supported portion 60 is in a fixed position on the lower flange portion 80 provided on the lower outer peripheral portion of the main body processing portion 32B and on the lower side of the lower flange portion 80. It is provided with a lower connecting member 81 bolted by. The lower flange portion 80 is integrally provided on the outer peripheral portion of the main body processing portion 32B in a state of projecting outward in the radial direction.

The lower connecting member 81 includes a strip-shaped main body 82 extending in the lateral direction, and a pair of vertical connecting portions 83 integrally provided on both sides of the main body 82 in the longitudinal direction so as to project forward. It is provided with a pair of laterally connecting portions 84 integrally provided so as to extend upward and rearward from both sides in the longitudinal direction of the main body portion 82. The lower connecting member 81 is bolted to a pair of lateral connecting portions 84 in a state where the lower connecting member 81 is abutted against the lower flange portion 80 from the lower side. Each of the pair of vertically oriented connecting portions 83 is formed with one insertion hole 85 through which a connecting bolt Bo is inserted.

The upper supported portion 59 is supported by the upper supporting portion 57 of the vertical frame body 25 in a state where the upper connecting member 69 is connected to the lower side of the upper flange portion 50 in a fixed position state. The mounting support portion 70 in the upper supported portion 59 is mounted and supported on the upper end portion of the vertical plate portion 62, and the horizontal support portion 71 is placed on the lateral guide surface of the vertical plate portion 62 from the lateral outside. It is connected in the state of being applied.
The upper end of the vertical plate portion 62 forms a mounting portion that receives and supports the mounting support portion 70 in a horizontal posture.

That is, two welding bolts 66 are inserted into the two insertion holes 74 formed in the mounting support portion 70, respectively, and the welding bolts 66 and the nuts 86 to be mounted are fastened and connected. Further, the bolt Bo mounted from the lateral outside inserts the insertion hole 75 formed in the lateral support portion 71 and the bolt insertion hole 68 formed in the lateral portion of the plate portion main body 63, and is fastened by the welding nut 67. And are connected. The mounting support portion 70 is connected to the side wall portion of the threshing device 5 via a support bracket 87.

In the lower supported portion 60, in a state where the lower connecting member 81 is fixedly connected to the lower flange portion 80, the pair of side plates 77 of the lower supporting portion 58 are connected by the pair of vertical connecting portions 83 from both lateral and outer sides. It is connected to the lower support portion 58 by connecting them with bolts in a state of being sandwiched and affixed. That is, the bolt Bo mounted from the laterally outer side of the vertical connecting portion 83 is inserted into the insertion hole 85 formed in the vertical connecting portion 83 and the bolt hole 78 formed in the side plate 77 to form the bolt Bo. Fasten with nuts not shown.

Then, as shown in FIG. 7, the two insertion holes 74 formed in the mounting support portion 70, the insertion holes 75 formed in the horizontal support portion 71, and the pair of vertical connecting portions 83 are formed, respectively. Each of the two insertion holes 85 is formed in a long elongated hole N extending horizontally along the front-rear direction. The five insertion holes 74, 75, 85, which are the elongated holes N, are locations where the second exhaust gas treatment device 32 and the vertical frame body 25 are connected by a shaft member J (bolts 66, Bo) through which the holes N are inserted. Is. By changing the position of the shaft member J within the range of the elongated holes N at these five locations, it is possible to change and adjust the relative position of the second exhaust gas treatment device 32 with respect to the vertical frame body 25 along the front-rear direction of the machine body. Is.

Therefore, the support position of the second exhaust gas treatment device 32 with respect to the airframe frame 24 is changed and adjusted by the position-changeable connection structure having the elongated hole as described above and the bolts 66 and Bo as the shaft member J through which the hole is inserted. A possible position adjusting mechanism T is configured. Then, the second exhaust gas treatment device 32 is supported by the vertical frame body 25, that is, the machine frame 24 via the position adjusting mechanism T in each of the upper support portion 57 and the lower support portion 58 provided in the vertical frame body 25. Has been done.

[Heat shield cover]
As shown in FIGS. 3 and 8, a heat shield cover 41 is provided between the grain tank 6 and the second exhaust gas treatment device 32 to block the heat of the second exhaust gas treatment device 32. The heat shield cover 41 is provided in a state of covering the upper side portion, the portion corresponding to the side opposite to the threshing device 5, and the portion corresponding to each of the rear side portion in the periphery of the second exhaust gas treatment device 32. Has been done.

As shown in FIG. 8, the upper surface 90 of the heat shield cover 41 covering the portion facing the grain tank 6 is located on the threshing device 5 side so as to be along the side surface of the recessed portion 48 of the grain tank 6 in an inclined posture. It is provided in an inclined posture that becomes higher as it goes toward it. By tilting the upper surface 90 in this way, the space on the upper side of the second exhaust gas treatment device 32 can be widened, and the heat generated by the second exhaust gas treatment device 32 is stored in the narrow space. Prevents heat from being dissipated easily.

A wide open inspection opening 91 is formed on the upper surface 90 of the heat shield cover 41 in an inclined posture. The opening 91 is covered with a lid 92 that can be opened and closed. The lower end of the lid 92 is received and locked by a receiving portion 93 formed on the lower side of the upper surface 90, and the upper portion is placed on the upper side of the upper surface 90 by fastening the wing bolt 94. It is connected. At the time of inspection, the lid 92 can be removed by loosening the wing bolt 94. Locking portions 95 for the operator to hold by hand are formed on both the left and right sides of the lid 92.

As shown in FIGS. 8 and 10, a notch 97 for passing the exhaust pipe 33 is formed in the upper portion of the rear vertical surface 96 of the heat shield cover 41. A porous member 99 as a ventilation portion is provided on the inner inner surface 98 (corresponding to the side surface opposite to the threshing device 5 side) of the heat shield cover 41 covering the portion facing the grain tank 6. The porous member 99 is formed of a net body. The porous member 99 is not limited to a net body, and may be a porous plate body or the like in which a large number of holes are bored.

A recessed portion 100 that recesses toward the threshing device 5 side is formed on the lower side of the front portion of the inner inner surface 98 of the machine body. By forming the recessed portion 100, a work space for an operator to insert his / her hand into the driving portion 8 is secured in a state where the grain tank 6 is switched to the overhanging posture.

The portion where the cover member 39 covering the intermediate exhaust pipe 37 of the exhaust pipe and the heat shield cover 41 are close to each other is separated in order to block heat transfer, but dust invades the inside through the gap between them. It has a structure that prevents it from happening.

To add an explanation, the notch 97 formed in the rear vertical surface 96 of the heat shield cover 41 is in a state of being largely opened in a substantially trapezoidal shape. On the other hand, the lower end portion of the cover member 39 that covers the exhaust pipe 33 is formed in a substantially trapezoidal shape along the inner edge portion of the notch 97. The inner edge portion 97a of the notch 97 and the proximal end side edge 39a of the cover member 39 are arranged in close proximity to each other.

As shown in FIGS. 9 and 10, a lateral flange portion 101 having a substantially L-shaped cross section is formed on the inner edge portion 97a of the notch 97 so as to project laterally outward. The lateral flange portion 101 is formed on each of the upper edge portion 97a1 in an inclined posture and the vertically oriented intermediate edge portion 97a2 connected to the upper edge portion 97a1 among the inner edge portions 97a of the trapezoidal notch 97. ..

A vertical flange portion 102 formed in a substantially L-shaped cross section is formed at a position corresponding to the lateral flange portion 101 on the base end side edge 39a of the cover member 39. The vertical flange portion 102 includes an upper end edge portion 39a1 formed at a position corresponding to the upper edge portion 97a1 of the notch 97 and an intermediate edge portion of the notch 97 among the base end side end edges 39a of the cover member 39. It is formed in each of the intermediate side edge 39a2 formed at the position corresponding to 97a2.

The horizontal flange portion 101 can prevent dust from entering the gap between the heat shield cover 41 and the cover member 39 from above, and the vertical flange portion 102 in an inclined posture corresponding to the upper edge portion 97a1 can prevent dust from entering. It is guided and discharged downward. Even if there is dust that falls on the upper side of the cover member 39 and is guided to the heat shield cover 41 side, it is received by the vertical flange portion 102 and discharged downward.

[Another Embodiment]
(1) In the above embodiment, the first exhaust gas treatment device 31 is provided in a state of being integrally connected to the engine 21, and the second exhaust gas treatment device 32 is configured so that the position can be adjusted with respect to the body frame 24. Instead of such a configuration, the engine 21 and the first exhaust gas treatment device 31 are relatively moved, and the first exhaust gas treatment device 31 and the second exhaust gas treatment device 32 are integrally connected. May be good. In this configuration, the first exhaust gas treatment device 31 may be provided so as to be repositionable with respect to the airframe frame 24. Further, the first exhaust gas treatment device 31 and the second exhaust gas treatment device 32 may each move relative to the engine 21. In this configuration, the first exhaust gas treatment device 31 and the second exhaust gas treatment device 32 may be separately provided so as to be repositionable with respect to the airframe frame 24.

(2) In the above embodiment, the position adjusting mechanism T is configured so that the support position can be changed and adjusted in the horizontal direction, but it may be configured so that the support position can be changed and adjusted in a different direction such as a vertical direction or an oblique direction.

(3) In the above embodiment, the exhaust gas treatment device is supported by the vertical frame body 25 via the position adjusting mechanism T in each of the upper support portion 57 and the lower support portion 58. Alternatively, it may be supported at one place in the vertical direction, or may be supported at three or more places.

(4) In the above embodiment, the exhaust gas treatment device is supported in a state where the upper supported portion 59 which is placed and supported on the upper support portion 57 and the lower support portion 58 are sandwiched and abutted from both laterally outer sides. The configuration is provided with the lower supported portion 60, but instead of this configuration, the upper supported portion 57 is supported by sandwiching and abutting the upper support portion 57 from both lateral and outer sides, and the lower supported portion 58. It may be configured to include a lower supported portion that is placed and supported on the vehicle.

(5) In the above embodiment, the position adjusting mechanism T is provided with the shaft member J and the elongated hole N. Instead of this configuration, for example, a screw feed type moving mechanism or an actuator is used to move the position adjusting mechanism T. Etc., various configurations can be used.

The present invention can be applied not only to head-feeding combine harvesters but also to ordinary-type combine harvesters.

6 Grain tank 21 Engine 22 Engine bonnet 24 Body frame 25 Vertical frame body 31 First exhaust gas treatment device (exhaust gas treatment device)
32 Second exhaust gas treatment device (exhaust gas treatment device)
48 Recessed part 53 Communication connection pipe 57 Upper support part 58 Lower support part 59 Upper side supported part 60 Lower side supported part 70 Mounting support part 71 Lateral support part J Shaft member N Long hole T Position adjustment mechanism

Claims (11)

The engine supported by the fuselage frame and
A first exhaust gas treatment device having a diesel particulate filter that collects diesel particulates and reducing diesel particulates contained in the exhaust gas from the engine .
A second exhaust gas treatment device that reduces nitrogen oxides contained in the exhaust gas after being treated by the first exhaust gas treatment device by utilizing selective catalyst reduction is provided.
The second exhaust gas treatment device is connected to the first exhaust gas treatment device via a communication connection pipe.
The engine is supported by the airframe frame via an elastic support.
The first exhaust gas treatment device is supported by the engine and is supported by the engine.
The second exhaust gas treatment device is supported by the airframe frame.
Said combine the support position changes adjustable positioning Organization are provided for the body frame of the second exhaust gas treatment device. The combine according to claim 1, wherein the position adjusting mechanism can change and adjust the support position in the horizontal direction. The airframe frame is provided with a vertical frame body extending in the vertical direction.
The vertically oriented frame body is provided with an upper support portion located on the upper side and a lower support portion located on the lower side.
The combine according to claim 1 or 2, wherein the second exhaust gas treatment device is supported by the vertically oriented frame body via the position adjusting mechanism in each of the upper support portion and the lower support portion. An upper supported portion that is placed and supported on the upper support portion and a lower supported portion that is supported by sandwiching the lower support portion from both laterally outer sides and abutting the second exhaust gas treatment device. The combine according to claim 3, wherein the combine is provided. A mounting support portion that is mounted and supported on the mounting portion of the upper supporting portion on the upper supported portion, and a lateral support portion that is supported on the lateral guide surface of the upper supporting portion from the lateral side. The combine according to claim 4, which is provided with a side support portion. Any of claims 1 to 5, wherein the position adjusting mechanism is provided with a shaft member extending in a direction intersecting the position changing direction and an elongated hole through which the shaft member is inserted and extending along the position changing direction. The combine described in item 1. The combine according to any one of claims 1 to 6, wherein the first exhaust gas treatment device is provided inside an engine bonnet that covers the upper part of the engine. The combine according to any one of claims 1 to 7, wherein the second exhaust gas treatment device is provided outside the engine bonnet that covers the upper part of the engine. The grain tank for storing grains is formed in a downward constriction shape when viewed from the front, and a recessed portion is formed on the downwardly constricted bottom inclined surface thereof so as to be recessed toward the inside of the tank.
The combine according to any one of claims 1 to 8, wherein the second exhaust gas treatment device is located below the front portion of the grain tank. The combine according to claim 9, wherein the second exhaust gas treatment device is supported by the airframe frame in a state of being inserted into the recessed portion. The combine according to any one of claims 1 to 10, wherein the communication connection pipe is connected to the exhaust gas outlet portion of the first exhaust gas treatment apparatus and is connected to the exhaust gas supply portion of the second exhaust gas treatment apparatus. ..

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