Combine harvester

Abstract

To solve the problem that the transmission efficiency of the output of an engine is lowered because the longitudinal position of the engine is slightly deviated by the action of a driving belt when the engine is continuously used.SOLUTION: An engine 10 for driving each part of a machine body is provided on a machine body frame 1 so that the axial direction is the lateral direction, and a flywheel 20 for stabilizing the rotation of the engine 10 is provided inside the engine 10 in the lateral direction so that the axial direction is the lateral direction. In the working vehicle, a housing member (21) having a larger diameter than a flywheel (20) is provided around the flywheel (20), a pair of front and rear mounting hubs (22) protruding in a front-rear direction of a machine body are provided on outer peripheral portions of the housing member (21) on front and rear sides of the machine body, an engine-side mount stay (23) is provided on each of the front and rear mounting hubs (22), and a vibration-proof member (25) is provided between the engine-side mount stay (23) and a frame-side mount stay (24) provided on a machine body frame (1) side.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a combine harvester. [Background technology]

[0002] Conventionally, a configuration has been known in which an engine mount made of an elastic material such as rubber is provided between the engine mounting portion of the aircraft frame and the connecting member between the engine body, thereby reducing engine vibration and reducing a decrease in durability around the engine mounting portion and vibration of the entire aircraft (Patent Document 1). The engine is pulled forward or backward by the action of the drive belt that transmits power to the traveling system and the working system, preventing insufficient transmission of driving force from the engine due to misalignment. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-039645 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned prior art, the engine mounts are positioned within the front-to-rear width of the engine, particularly in positions overlapping the flywheel attached to the engine output shaft, due to the need to provide a connecting member on the engine body side, so it is not possible to ensure a wide gap between the axis of the engine output shaft and the front and rear engine mounts, while a wide gap must be maintained between the axis of the engine output shaft and the front and rear engine mounts in the vertical direction. As a result, engine vibrations are not sufficiently absorbed or reduced, which can lead to problems such as reduced durability of various parts due to the vibrations and increased fatigue for the passengers. Furthermore, due to the action of the drive belt, slight misalignment occurs between the front and rear of the engine as it continues to be used, which causes a problem of reduced efficiency in transmitting engine output. The present invention solves the above-mentioned problems by devising a mount attachment structure that suppresses the transmission of engine vibrations and prevents the engine from shifting forward and backward. [Means for solving the problem]

[0005] The invention described in claim 1 is a work vehicle characterized in that an engine 10 that drives each part of the body is mounted on a body frame 1 with its axis running in the left-right direction, a flywheel 20 whose axis runs in the left-right direction and stabilizes the rotation of the engine 10 is mounted inside the left-right direction of the engine 10, a housing member 21 with a larger diameter than the flywheel 20 is mounted around the flywheel 20, a pair of front and rear mounting hubs 22 that protrude in the front-to-rear direction of the body are mounted on the front and rear outer peripheries of the housing member 21, an engine side mount stay 23 is mounted on each of the front and rear mounting hubs 22, and a vibration-damping member 25 is mounted between the engine side mount stay 23 and a frame side mount stay 24 mounted on the body frame 1 side. The invention described in claim 2 is the work vehicle described in claim 1, characterized in that a left-right mounting support shaft 26 is attached to the engine-side mount stay 23 and the frame-side mount stay 24 in a loose fit state so that it does not move axially but is not fixed in the radial direction, a vibration-damping member 25 is attached to the mounting support shaft 26 between the engine-side mount stay 23 and the frame-side mount stay 24, and the mounting support shafts 26 of the front and rear engine-side mount stays 23 and frame-side mount stays 24 are positioned equidistant from the rotation axis 27 of the flywheel 20. The invention described in claim 3 is a work vehicle described in claim 1 or 2, characterized in that a running device 2 and a harvesting device 4 are mounted on a body frame 1, a running drive belt 31 that transmits driving force to the running device 2 and a working drive belt 32 that transmits driving force to the harvesting device 4 are mounted on an engine-driven rotor 30, and the vibration-damping member 25 is formed in a left-right width so that it overlaps the engine-driven rotor 30 and the working drive belt 32 in a planar view, but does not overlap the running drive belt 31 and the housing member 21, and the vibration-damping member 25 is positioned forward and rearward of the front and rear ends of the engine 10 main body, and more inward than the end on the side where the flywheel 20 is provided. The invention described in claim 4 is a work vehicle as described in claim 3, characterized in that an exhaust pipe 35 through which the exhaust of the engine 10 passes is provided above the flywheel 20, a mounting protrusion 37 is formed on the upper part of the housing member 21 to mount an exhaust pipe support stay 36, a belt stopper 38 is provided to protect the winding area of ​​the traveling drive belt 31 and the work drive belt 32, a stopper mounting portion 39 is formed on the lower part of the housing member 21, and the stopper mounting portion 39 is formed on the inner circumference of the housing member 21. The invention described in claim 5 is a work vehicle as described in claim 1 or 2, characterized in that an oil pan 43 having an oil drain 42 formed therein for discharging oil from the engine 10 is provided below the engine 10, the oil drain 42 is configured to be closed by a drain bolt 44, a pair of left and right parallel beam members 45 extending in the fore-and-aft direction are arranged at the left-right center of the body frame 1, with a space between them, and the oil drain 42 is arranged within the space between the left and right of the pair of parallel beam members 45. The invention described in claim 6 is a work vehicle as described in claim 1 or 2, characterized in that a control unit 47 is arranged above the engine 10, an oil tank 48, an oil filter 49, and a battery 50 are arranged inside the control unit 47 and further forward of the engine 10, the oil tank 48 and the oil filter 49 are arranged on the body frame 1 located below the control unit 47, a battery stay 51 is detachably arranged above the oil tank 48 and in front of the oil filter 49, and a detachable front cover 53 is provided in front of the space battery 50 in which the oil tank 48, battery oil filter 49, etc. are arranged. [Effects of the Invention]

[0006] In the invention described in claim 1, a flywheel 20 whose axis runs in the left-right direction is provided inside the engine 10 in the left-right direction to stabilize the rotation of the engine 10, a housing member 21 with a larger diameter than the flywheel 20 is provided around the flywheel 20, a pair of front and rear mounting hubs 22 that protrude in the fore-and-aft direction of the aircraft are provided on the front and rear outer peripheries of the housing member 21, an engine-side mount stay 23 is provided on each of the front and rear mounting hubs 22, and vibration-damping members 25 are provided between them and a frame-side mount stay 24 that is provided on the aircraft frame 1 side. Therefore, by providing the engine-side mount stays 23 on the housing member 21 via the mounting hubs 22, the distance that the vibration-damping member 25 is separated from the axis of the engine 10 in the front-and-aft direction can be increased, improving vibration-damping properties. The improved vibration-damping properties suppress vibration and noise of the aircraft, reducing operator fatigue and preventing a decrease in the durability of the aircraft. In the invention described in claim 2, the left-right mounting support shafts 26 are attached to the engine-side mount stay 23 and the frame-side mount stay 24 in a loose fit state so that they do not move axially but are not fixed in the radial direction, and vibration-damping members 25 are attached to the mounting support shafts 26 between the engine-side mount stay 23 and the frame-side mount stay 24. The mounting support shafts 26 of the front and rear engine-side mount stays 23 and frame-side mount stays 24 are positioned equidistant from the rotation axis 27 of the flywheel 20, so by arranging the vibration-damping members 25 on the left-right mounting support shafts 26 with spaces between them in the front and rear, it is possible to prevent slight movement in the front-to-rear direction due to the drive of the engine 10 and to reduce a decrease in transmission efficiency due to changes in the engine position. In the invention described in claim 3, the traveling device 2 and the harvesting device 4 are mounted on the machine frame 1, and the traveling drive belt 31 that transmits driving force to the traveling device 2 and the working drive belt 32 that transmits driving force to the harvesting device 4 are mounted on the engine-driven rotor 30, and the vibration-damping member 25 is formed with a left-right width that is positioned so that it overlaps the engine-driven rotor 30 and the working drive belt 32 in a planar view, but does not overlap the traveling drive belt 31 and the housing member 21, and the vibration-damping member 25 is positioned forward and rearward of the front and rear ends of the engine 10 main body and more inward than the end on the side where the flywheel 20 is provided.Therefore, by reducing the left-right width of the vibration-damping member 25, it is possible to obtain a vibration-damping effect while reducing the left-right width of the entire engine 10, and by positioning the vibration-damping member 25 forward and rearward of the front and rear ends of the engine 10 main body, the load of the engine 10 is more easily distributed, improving the vibration-damping effect. In the invention described in claim 4, an exhaust pipe 35 through which the exhaust of the engine 10 passes is provided above the flywheel 20, a mounting protrusion 37 for mounting an exhaust pipe support stay 36 is formed on the upper part of the housing member 21, a belt stopper 38 for protecting the winding area of ​​the traveling drive belt 31 and the working drive belt 32 is provided, and a stopper mounting portion 39 is formed on the lower part of the housing member 21, and the stopper mounting portion 39 is formed on the inner periphery of the housing member 21, so there is no need to separately form the exhaust pipe support stay 36 or the stopper mounting portion 39 for the belt stopper 38, an increase in the number of parts and weight is suppressed, shaking of the exhaust pipe due to vibration of the engine 10 is suppressed, noise is reduced and damage is prevented, and power transmission stoppage due to the drive belt falling off is prevented. In the invention described in claim 5, an oil pan 43 having an oil drain 42 formed therein for discharging oil from the engine 10 is provided below the engine 10, and the oil drain 42 is configured to be closed by a drain bolt 44. A pair of left and right parallel beam members 45 extending in the fore-and-aft direction are arranged at the center of the left and right of the body frame 1, spaced apart from each other on the left and right, and the oil drain 42 is configured to be arranged within the left and right space between the pair of parallel beam members 45. Therefore, by arranging the oil pan 43 between the left and right of the pair of parallel beam members 45, it is easy to attach and detach the drain bolt 44 from below, improving maintainability. In the invention of claim 6, a control unit 47 is disposed in front of the engine 10, an oil tank 48, an oil filter 49, and a battery 50 are disposed inside the control unit 47 and on the aircraft front side of the engine 10, the oil tank 48 and the oil filter 49 are disposed on the aircraft frame 1 located below the control unit 47, a battery stay 51 is detachably disposed above the oil tank 48 and in front of the oil filter 49, and a battery stay 51 is detachably disposed in front of a space 52 in which the oil tank 48, the battery oil filter 49, etc. are disposed. The configuration is provided with a removable front cover 53, so that when the front cover 53 is removed, the battery 50 and oil tank 48 are exposed, allowing the battery 50 to be replaced or the oil to be refilled from the front of the machine, improving maintainability.The battery stay 51 and battery 50 are located in front of the oil filter 49, making it difficult for impurities such as dust to get into the oil filter 49, and when the battery stay 51 is removed, the oil filter 49 can be accessed from the front of the machine, improving maintainability. [Brief explanation of the drawings]

[0007] [Figure 1] Side view of a combine harvester. [Figure 2] Front view of the engine area. [Figure 3] Same plan view. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] The same front view. [Figure 7] The same front view. [Figure 8] The same perspective view. [Figure 9] Same plan view. [Figure 10] The same perspective view. [Figure 11] FIG. [Figure 12] The same perspective view. [Figure 13] The same perspective view. [Figure 14] FIG. [Figure 15] 1A and 1B are a perspective view, a side view, and a plan view of an idle roller arm; [Figure 16] Rear view of the same. [Figure 17] The same action state diagram. [Figure 18] FIG. 10 is a side view of the idle roller arm turned upside down. [Figure 19] Rear view of the combine showing the sun visors. [Figure 20] The same perspective view. [Figure 21] Same plan view. [Figure 22] The same perspective view. [Figure 23] Rear view of the combine with the sun visors retracted. DETAILED DESCRIPTION OF THE INVENTION

[0008] One embodiment of the present invention will be explained with reference to the drawings. 1 is the combine body frame, 2 is the traveling device, 3 is the threshing device mounted above the body frame 1, 4 is the harvesting device mounted in front of the threshing device 3, 5 is the grain recovery unit mounted on the side of the threshing device 3, and 6 is the control unit mounted in front of the grain recovery unit 5 (Figure 1). For ease of understanding, the following description will be given using directions such as front-rear, left-right, and up-down based on the direction of travel of the aircraft, but these directions do not limit the configuration of the present invention. An engine (diesel engine) 10 that drives each part of the aircraft is mounted on the aircraft frame 1. In this embodiment, it is installed below the pilot's seat 7 of the control section 6. A cooling fan 12 is provided outside the engine 10 in the direction of travel of the machine body, a radiator 11 is provided outside the cooling fan 12, and a radiator cover 14 having a dustproof net (not shown) is provided outside the radiator 11.

[0009] A flywheel 20, whose axis runs in the left-right direction, is provided inside the engine 10 in the left-right direction to stabilize the rotation of the engine 10. A housing member 21 with a larger diameter than the flywheel 20 is provided around the flywheel 20, and a pair of front and rear mounting hubs 22 that protrude in the front-to-rear direction of the aircraft are provided on the front and rear outer peripheries of the housing member 21, and engine-side mount stays 23 are provided on each of the front and rear mounting hubs 22, and vibration-isolating members (mount rubber members) 25 are provided between the front and rear mounting hubs 22 and frame-side mount stays 24 provided on the aircraft frame 1 side. That is, in this embodiment, the vibration-damping support mechanism is configured to be supported by a total of four vibration-damping members 25, with a pair of front and rear vibration-damping members 25 provided on the left and right sides, and at least the inner pair of front and rear vibration-damping members 25 are configured to be attached to mounting hubs 22 and engine-side mount stays 23 provided on the outer periphery of the front and rear of the airframe of the housing member 21 of the flywheel 20. In other words, since the pair of inner front and rear vibration-damping members in the prior art were arranged to support the underside of the oil pan of the engine body, the distance between them and the pair of outer front and rear vibration-damping members was short, resulting in low vibration-damping performance.

[0010] In the present invention, a housing member 21 is fixedly provided so as to surround the outer periphery of a rotating flywheel 20 located inside the engine 10 body, and a pair of front and rear vibration-damping members 25 are provided on the inside of this housing member 21 side, so that the placement span of the left and right protective members 25 can be lengthened and the vibration-damping effect can be improved. Therefore, in the present invention, it is sufficient to provide a pair of front and rear vibration-damping members 25 inside the rotational trajectory position of the flywheel 20 (on the left side in the direction of travel), and although the configuration of the housing member 21 is arbitrary, the housing member 21 is shaped to surround the outer periphery of the side surface of the flywheel 20 facing the engine 10 main body, and the outer side portion of the housing member 21 is fixedly attached to the engine 10 main body side. In addition, by providing the engine side mount stay 23 via each mounting hub 22 that protrudes in the fore-and-aft direction from the housing member 21, the distance that the vibration-damping member 25 is spaced from the axis of the engine 10 in the fore-and-aft direction can be increased, thereby improving vibration-damping properties.

[0011] Improved vibration isolation reduces vibration and noise from the machine, reducing fatigue for the operator and preventing a decrease in the machine's durability. In other words, in the past, the vibration-damping members 25 were positioned in a position that overlapped the fore-and-aft width of the flywheel attached to the engine output shaft when viewed from the side, so it was not possible to ensure a wide gap between the axis of the engine output shaft and the front and rear vibration-damping members 25, resulting in reduced vibration-damping performance.However, in the present invention, the vibration-damping members 25 are provided on the housing member 21 of the flywheel 20, so the fore-and-aft gap between the vibration-damping members 25 can be widened, improving vibration-damping performance. A left-right mounting support shaft 26 is attached to the engine-side mount stay 23 and the frame-side mount stay 24 in a loose fit state so that it does not move axially but is not fixed in the radial direction, and a vibration-isolating member 25 is attached to the mounting support shaft 26 between the engine-side mount stay 23 and the frame-side mount stay 24. The mounting support shafts 26 of the front and rear engine-side mount stays 23 and frame-side mount stays 24 are positioned equidistant from the rotation axis 27 of the flywheel 20.

[0012] That is, the engine-side mount stay 23 and the frame-side mount stay 24 are formed with insertion holes (not shown) having a larger diameter than the mounting support shaft 26, and the mounting support shaft 26 is attached in a loose fit state so that it does not move axially and is not fixed in the radial direction, thereby blocking the transmission of vibration between the engine-side mount stay 23 and the frame-side mount stay 24. Therefore, by arranging the vibration-damping members 25 at intervals in the front and rear on the mounting support shaft 26 that protrudes in the left-right direction, minute movement in the front-rear direction due to the drive of the engine 10 can be prevented, and the decrease in transmission efficiency due to changes in the engine position can be reduced. That is, by reducing the displacement of the position of the engine 10 (engine vibration), the magnitude of the vector in a direction different from the transmission direction becomes smaller, and the decrease in transmission efficiency becomes smaller.

[0013] The running device 2 and the harvesting device 4 are mounted on the machine frame 1, and the running drive belt 31 that transmits the driving force to the running device 2 and the working drive belt 32 that transmits the driving force to the harvesting device 4 are mounted on the engine-driven rotating body (pulley) 30. The vibration-damping member 25 is formed with a left-right width that is positioned so that it overlaps the engine-driven rotating body 30 and the working drive belt 32 in a plan view, but does not overlap the running drive belt 31 and the housing member 21. The vibration-damping member 25 is positioned forward and rearward of the front and rear ends of the engine 10 main body, and inside the end on the side where the flywheel 20 is provided.

[0014] That is, the engine-driven rotor 30 of the engine 10 is formed long in the axial direction, and two systems of rotation transmission belts that transmit rotation to the traveling device 2 and the threshing device 3 are looped around one engine-driven rotor 30, and the vibration-damping member 25 is wrapped around one of the two systems of belts but not the other belt. That is, by overlapping the components to which the engine 10 is attached, the amount by which each component protrudes inward relative to the main body of the engine 10 is reduced, and the lateral width of the entire engine 10 can be reduced. In addition, by providing a vibration-damping member 25 on the inside of the flywheel 20 attached to the engine 10 when viewed in plan, the amount of inward protrusion of the protective clothing member 25 from the main body of the engine 10 can be reduced, and the overall left-right width of the engine 10 can also be reduced.

[0015] Furthermore, by reducing the displacement of the engine 10 (engine vibration), the magnitude of the vibration vector in a direction different from the transmission direction is reduced, reducing the decrease in vibration transmission efficiency and improving vibration damping. Therefore, by reducing the lateral width of the vibration-isolating member 25, it is possible to obtain a vibration-isolating effect while reducing the lateral width of the entire engine 10. By arranging the vibration-isolating members 25 on the front and rear sides of the front and rear ends of the engine 10 body, the load of the engine 10 is easily distributed, improving the vibration-isolating effect. An exhaust pipe 35 through which the exhaust gas from the engine 10 passes is provided above the flywheel 20, and a mounting protrusion 37 for mounting an exhaust pipe support stay 36 is formed on the upper part of the housing member 21. A belt stopper 38 for protecting the winding area of ​​the traveling drive belt 31 and the working drive belt 32 is provided, and a stopper mounting portion 39 is formed on the lower part of the housing member 21, and the stopper mounting portion 39 is formed on the inner periphery of the housing member 21.

[0016] That is, by forming the stopper attachment portion 39 on the "inner circumference" of the housing member 21, the amount of protrusion of the stopper attachment portion 39 can be reduced. There is no need to separately form the exhaust pipe support stay 36 or the stopper mounting portion 39 of the belt stopper 38, which prevents an increase in the number of parts and weight. Vibration of the exhaust pipe caused by vibration of the engine 10 is suppressed, noise is reduced, damage is prevented, and power transmission stoppage due to the drive belt coming off is prevented. An oil pan 43 having an oil drain 42 formed therein for discharging oil from the engine 10 is provided below the engine 10, and the oil drain 42 is configured to be closed by a drain bolt 44. A pair of left and right parallel beam members 45 extending in the front-rear direction are arranged at the left-right center of the machine frame 1 with a space between them, and the oil drain 42 is arranged within the space between the left and right of the pair of parallel beam members 45.

[0017] By disposing the oil pan 43 between the left and right sides of the pair of parallel beam members 45, the drain bolt 44 can be easily attached and detached from below, improving maintainability. A control unit 47 is arranged above the engine 10, an oil tank 48, an oil filter 49, and a battery 50 are arranged inside the control unit 47 and further forward of the engine 10 in the aircraft body, the oil tank 48 and the oil filter 49 are arranged on the aircraft frame 1 located below the control unit 47, a battery stay 51 is detachably arranged above the oil tank 48 and in front of the oil filter 49, and a detachable front cover 53 is provided in front of a space 52 in which the oil tank 48, battery oil filter 49, etc. are arranged. When the front cover 53 is removed, the battery 50 and oil tank 48 are exposed, and the battery 50 can be replaced or oil refilled from the front of the machine, improving maintainability.

[0018] By positioning the battery stay 51 and the battery 50 in front of the oil filter 49, it becomes difficult for foreign matter such as dust to get in, and by removing the battery stay 51, the oil filter 49 can be accessed from the front side of the machine body, improving maintainability. The vibration-damping member 25 may have any configuration, but as an example, a pair of engine-side mount stays 23 are provided at the front and rear of the outer periphery of the mounting hub 22 of the housing member 21 of the engine 10, a frame-side mount stay 24 is arranged opposite each engine-side mount stay 23, the base of the frame-side mount stay 24 is fixed to the aircraft frame 1 side, both ends of a mounting support shaft 26 are attached to the engine-side mount stay 23 and the frame-side mount stay 24 in a loose fit state, and the vibration-damping member 25 is attached to the mounting support shaft 26. Therefore, vibrations of the engine-side mount stay 23 caused by the engine 10 are absorbed by the vibration-isolating member 25, suppressing transmission of vibrations to the frame-side mount stay 24, thereby improving the vibration-isolating effect.

[0019] Furthermore, the mounting support shaft 26 is allowed to move in a direction perpendicular to the axial direction within an insertion hole (not shown) provided in the engine-side mount stay 23. As a result, although the mounting support shaft 26 is mounted across the engine-side mount stay 23 and the frame-side mount stay 24, the presence of the mounting support shaft 26 prevents vibrations from the engine-side mount stay 23 from being transmitted to the frame-side mount stay 24. A mounting hub 22 is provided at a predetermined position in the fore-and-aft direction of a housing member 21 incorporating a flywheel 20 installed at the left end of the engine 10, an engine-side mount stay 23 is attached to the mounting hub 22, and the engine-side mount stay 23 and a frame-side mount stay 24 provided on the aircraft frame 1 are connected and held by a vibration-isolating member 25. In the conventional vibration isolation configuration for the engine 10, the vibration isolation member 25 is provided on the engine 10 side, on the outer side in the traveling direction of the flywheel 20 than the housing member 21, so the distance from the engine 10 to the front and rear of the aircraft is short, which creates the problem of low vibration reduction effect.

[0020] The vibration-isolating mount vibration-isolating members 25 on the front and rear left sides of the engine 10 are located inward in the traveling direction from the engine 10 body and further away in the front-to-rear direction compared to the conventional configuration, which increases the vibration reduction effect and reduces operator fatigue caused by vibration. This also leads to a reduction in noise and damage caused by vibration of the engine 10. In other words, in the past, the engine 10 was supported by vibration-damping members 25 at the part of the oil pan 43 outside the housing member 21, which resulted in a low vibration-damping effect, but in the present invention, in order to suppress vibration of the engine 10, vibration-damping members 25 that support the engine 10 are provided on the housing member 21, so the distance between the vibration-damping members 25 that support the outside of the engine 10 can be increased, making it possible to support the engine 10 over a long span and improving the vibration-damping effect.

[0021] The housing member 21 of the flywheel 20 and the aircraft frame 1 are connected and held by a cylindrical vibration-damping member (mount) 25 in the horizontal (left-right) direction, thereby mitigating positional displacement of the engine 10 due to tension in the front and rear belts (travel drive belt 31 and work drive belt 32). The pair of vibration-isolating mounts 25 on the front and rear left sides of the engine 10 can be supported at a distance from the engine 10 body, reducing vibration and reducing operator fatigue caused by vibration. Reduce noise and damage caused by vibration of the engine 10. A pair of front and rear vibration isolation members 25 for support are arranged symmetrically in the front and rear with respect to the rotation axis 27 of the flywheel 20. The pair of vibration-damping members 25 on the front and rear left sides of the engine 10 can be supported at a location farther away from the engine 10, thereby reducing vibration. This reduces fatigue of the operator due to vibration. It also reduces noise and damage caused by engine 10 vibration. The pair of inner front and rear vibration-damping members 25 are arranged symmetrically in the front and rear directions with respect to the imaginary central axis of the engine 10 in the vertical direction in a side view.

[0022] Therefore, the pair of vibration-isolating mount vibration-isolating members 25 on the front and rear left sides of the engine 10 can be supported at a distance from the engine 10 body, reducing vibration and reducing operator fatigue caused by vibration. Reduce noise and damage caused by vibration of the engine 10. The vibration isolation members 25 are arranged symmetrically with respect to the center of gravity of the engine 10. That is, a total of four vibration-isolating members 25, one pair in the front and one pair in the left and right, are preferably arranged symmetrically in the front and rear and left and right with respect to the center of gravity of the engine 10. Therefore, the pair of vibration-damping members 25 on the front and rear left sides of the engine 10 can be supported at a distance from the engine 10, reducing vibration. This reduces fatigue of the operator due to vibration. It also reduces noise and damage caused by engine 10 vibration. The vibration-isolating member 25 is configured to be arranged so as to linearly overlap the engine pulley (travel drive belt 31) 56 installed on the left side of the housing member 21 of the flywheel 20 in a plan view.

[0023] Therefore, the pair of vibration-isolating mount vibration-isolating members 25 on the front and rear left sides of the engine 10 can be supported at a distance from the engine 10 body, reducing vibration and reducing operator fatigue caused by vibration. Reduce noise and damage caused by vibration of the engine 10. Of the pair of inner front and rear vibration-damping members 25, the rear vibration-damping member 25 is arranged to overlap the work drive belt 32 that is arranged to extend rearward of the machine body in a plan view (FIG. 3). Therefore, by arranging the rear vibration-damping members 25 on the inside of the engine 10 relative to the outer vibration-damping members 25, the span between the left and right vibration-damping members 25 can be lengthened, improving the vibration-damping effect. The vibration-isolating member 25 is arranged inside the machine body in plan view, close to the travel drive belt 31 arranged from the rear of the machine body toward the front.

[0024] In other words, the traveling drive belt 31 and the vibration-isolating member 25 are arranged so as not to overlap each other in a plan view. That is, as shown in Figure 5, the running drive belt 31 and the vibration-damping member 25 overlap in a side view, but as shown in Figure 3, the running drive belt 31 and the vibration-damping member 25 do not overlap in a plan view, thereby preventing interference. The vibration-isolating member 25 is disposed close to the travel drive belt 31 disposed at the rear of the machine body in a plan view. The vibration-isolating member 25 is disposed close to the outer periphery of the flywheel housing member 21 in a side view. In other words, since the flywheel 20 is heavy and rotates, the vibration-damping member 25 that supports the engine 10 can be placed as close as possible to the flywheel 20, which is a heavy object, to stabilize the support, and as a result, the engine 10 can be supported stably.

[0025] The vibration-isolating member 25 is disposed below the outer periphery of the engine driving rotor 30 in a side view. Therefore, the vibration isolating member 25 can support the engine 10 at a lower position, and the engine can be supported stably. The vibration-isolating members 25 are disposed on the outer side in the front-rear direction from the front and rear surfaces of the engine 10 body in a side view. Therefore, the engine 10 can be supported by the vibration isolating members 25 over a long span in the front and rear directions, so that the engine 10 can be stably supported and the vibration effect can be improved. The vibration-isolating member 25 is disposed on the left outer side of the left side surface of the engine 10 body in a plan view. Therefore, the engine 10 can be supported over a long left-right span, so that the engine 10 can be stably supported and vibration can be suppressed.

[0026] An exhaust pipe support stay 36 connected to an exhaust pipe 35 is provided at the upper end of an outer peripheral housing member 21 that houses the flywheel 20 at the left end of the engine 10 (FIG. 5). An oil pan 43 having an oil drain 42 formed therein for discharging oil from the engine 10 is provided below the engine 10, and the oil drain 42 is configured to be closed by a drain bolt 44. A pair of left and right parallel beam members 45 extending in the fore-and-aft direction are arranged at the center of the left and right of the body frame 1, with a space between them on the left and right, and the oil drain 42 is configured to be arranged within the space between the pair of parallel beam members 45 on the left and right (Figure 7). Therefore, by disposing the oil pan 43 between the left and right of the pair of parallel beam members 45, the drain bolt 44 can be attached and detached from below and oil can be drained in the space on the left and right of the parallel beam members 45, improving maintainability and reducing the number of parts.

[0027] An exhaust pipe 35 through which the exhaust gas from the engine 10 passes is provided above the flywheel 20, and a mounting protrusion 37 for mounting an exhaust pipe support stay 36 is formed on the upper part of the housing member 21. A belt stopper 38 for protecting the winding area of ​​the traveling drive belt 31 and the working drive belt 32 is provided, and a stopper mounting portion 39 is formed on the lower part of the housing member 21, and the stopper mounting portion 39 is formed on the inner periphery of the housing member 21. Therefore, there is no need to separately form the exhaust pipe support stay 36 or the stopper mounting portion 39 of the belt stopper 38, which prevents an increase in the number of parts and weight. Vibration of the exhaust pipe caused by vibration of the engine 10 is suppressed, noise is reduced, damage is prevented, and power transmission stoppage due to the drive belt coming off is prevented.

[0028] A control unit (front panel) 47 is arranged in front of the engine 10, an oil tank 48, an oil filter 49, and a battery 50 are arranged inside the control unit 47 and further forward of the engine 10, the oil tank 48 and oil filter 49 are arranged on the aircraft frame 1 located below the control unit 47, a battery stay 51 is detachably arranged above the oil tank 48 and in front of the oil filter 49, and a detachable front cover (front cover) 53 is provided in front of the space battery 50 in which the oil tank 48, battery oil filter 49, etc. are arranged. Therefore, when the front cover 53 is removed, the battery 50 and the oil tank 48 are exposed, and the battery 50 can be replaced or the oil refilled from the front of the machine, improving maintainability.

[0029] By positioning the battery stay 51 and the battery 50 in front of the oil filter 49, it becomes difficult for foreign matter such as dust to get in, and by removing the battery stay 51, the oil filter 49 can be accessed from the front side of the machine body, improving maintainability. In addition, the temperature environment around the operator's seat (not shown) is improved, fatigue during long hours of work is reduced, and problems caused by dirt and dust on important parts can be avoided. When the battery stay 51 is removed, the oil tank 48 and the oil filter 49 are exposed, facilitating removal and maintenance. The idle roller arm 66 to which the idle roller 65 of the traveling device 2 is attached is shaped so that it can be installed (mounted) in an up-down direction (inverted) on the traveling frame 68 of the traveling device 2, and the installation height of the idle roller 65 at the rear end of the idle roller arm 66 can be changed, thereby making it possible to change the position of the lower rear end of the crawler 69 between a normal state and a boat-shaped state.

[0030] In other words, when the height of the idle roller 65 is increased, the lower rear end of the crawler 69 is changed to a boat-shaped state, thereby improving turning performance, and when the height of the idle roller 65 is decreased, the lower rear end of the crawler 69 is returned to its normal state, increasing the contact area of ​​the crawler 69 and improving performance in wet fields. In this case, the idle roller arm 66 is attached to the rear of the tension shaft 70, and the tension shaft 70 is attached to the traveling frame 68 so that it can move back and forth.The axial position of the idle roller arm 66 relative to the tension shaft 70 changes, but the height position of the tension shaft 70 relative to the traveling frame 68 does not change. Therefore, even though the height position of the idle roller 65 is changed, the load does not change and strength can be maintained.

[0031] When the idle roller 65 is positioned at the top (boat-shaped), the upper surface of the idle roller 65 does not exceed the upper surface of the carrier roller 71 located at the front or is located at the same height. That is, if the upper surface of the idle roller 65 exceeds the upper surface of the carrier roller 71 , the crawler 69 will rise rearward and come closer to the machine frame 1 . In the present invention, the above-described configuration makes it possible to prevent interference between the crawler 69 and the machine frame 1. The rear foot 72 connecting the rear end of the traveling frame 68 with the left and right traveling frames 68, the idle roller 65 and the idle roller arm 66 of the idle roller 65 are unitized, the traveling frame 68 at the front of the machine frame 1 is extended to increase the number of rollers 73, and the longitudinal length of the traveling device 2 and the length of the crawler crawler 69 can be freely extended. Therefore, the vehicle configuration can be simplified by forming the traveling device 2 as a rear unit.

[0032] In the combine harvester of this embodiment, the storage section 5 is formed by a storage hopper 5A, and an assistant is configured to bag the grain stored in the storage hopper 5A (not shown).A hopper sun visor 76 is provided on the storage hopper 5A, and when viewed from the front, the hopper sun visor 76 is extended above the assistant, with the tip side (right side of the machine body) tilted upward from the center of the machine body. The hopper sun visor 76 has a light-blocking sheet member 79 stretched across a horizontal frame 78 of a sun visor frame 77, blocking light from above the assistant's head. Therefore, a space is formed above the assistant, making it easier for the assistant to enter below the hopper sun visor 76, and preventing straw chips and rain from accumulating on the hopper sun visor 76. Furthermore, rainwater or the like can be prevented from accumulating on the hopper sun visor 76, so that the hopper sun visor 76 can be prevented from coming off due to the weight of the water and the worker can be prevented from getting splashed with water. In the case of straw chips, this prevents them from falling onto the worker's head and also prevents them from accumulating in the storage hopper 5A.

[0033] The hopper sun visor 76 above the assistant is configured so that when viewed from the front, the tip side (right side of the machine body) is tilted downward from the center of the machine body when the hopper sun visor 76 above the assistant is stored. Therefore, it is possible to configure the hopper sun visor 76 so that straw scraps and rainwater are guided inward toward the inside of the machine body. When viewed from the front, the hopper sun visor 76 is in an overhanging state above the assistant, and the tip end of the hopper sun visor 76 (on the right side of the machine body) is installed at an upward incline that gradually increases from the center of the machine body outward. The height of the outer tip of the hopper sun visor 76 is the same as the height of the operator's sun visor 82 provided at the front of the machine body, and is configured to be the same as the up and down adjustment height range of the hopper sun visor 76 and the operator's sun visor 82. Therefore, by not allowing the hopper sun visor 76 to protrude too far above the operator sun visor 82, damage due to contact with an obstacle can be prevented.

[0034] When viewed from the front, the hopper sun visor 76 is extended over the assistant, and the front end of the hopper sun visor 76 and the rear end of the operator sun visor 82 are substantially aligned. The sun visor frame 77 of the hopper sun visor 76 that surrounds the assistant is installed at the outer upper end of the front and rear surfaces of the storage hopper 5A. Therefore, we aim to make the aircraft compact and easy to store. When viewed from the front, a sub-carrier 84 that protrudes laterally is provided below the hopper sun visor 76 above the assistant, and an assistant backrest 85 that can support the assistant's back is provided midway between the top and bottom of the hopper sun visor 76 and the sub-carrier 84. The assistant backrest 85 is attached to the tip of an arm 87 that is attached so as to be able to rotate freely around a rotation shaft 86, and the rotation shaft 86 is positioned inside the right end of a radio cover 88 on the right side of the machine body, and is on approximately the same line. Therefore, efforts are being made to make the aircraft more compact.

[0035] The sub-carrier 84 and the assistant backrest 85 are configured to be freely raised and lowered, and are configured to be stored (contained) in a vertical position when not in use. When viewed from the front, the rotation axis 86 of the hopper sun visor 76 on the assistant, the subcarrier 84, and the assistant backrest 85 is positioned inside the end of the right cutting culm at the right end of the machine body. Therefore, the aircraft can be made compact. The hopper sun visor 76 is configured so that the vertical shaft portion 90 of the sun visor frame 77 is inserted and held in a freely detachable manner in boss support portions 91 provided on the front and rear surfaces of the storage hopper 5A, and multiple through holes (not shown) are arranged in parallel in the vertical direction in the vertical shaft portion 90 (front and rear insertion pipe) of the hopper sun visor 76, and the height at which it is held in the vertical direction can be changed and adjusted by inserting a snap pin (not shown) or the like. Therefore, the height of the hopper sun visor 76 can be easily adjusted. By changing the orientation of the sun visor frame 77, the hopper sun visor 76 can be stored above the storage hopper 5A. [Explanation of symbols]

[0036] 1...machine frame, 2...traveling device, 3...threshing device, 4...reaping device, 5...grain recovery section, 6...control section, 7...driver's seat, 10...engine, 12...cooling fan, 14...radiator cover, 20...flywheel, 21...housing member, 22...mounting hub, 23...engine side mount stay, 24...frame side mount stay, 25...vibration-damping member, 26...mounting support shaft, 27...rotating shaft, 30...engine drive rotor, 31...traveling drive belt, 32...working drive belt, 35...exhaust pipe, 36...exhaust pipe support stay, 37...mounting protrusion, 38...belt stopper, 39...stopper mounting section, 42...oil drain, 43...oil pump , 44...Drain bolt, 45...Parallel beam member, 47...Control unit, 48...Oil tank, 49...Oil filter, 50...Battery, 51...Battery stay, 52...Front cover, 55...Threshing drive belt, 56...Engine pulley, 65...Idle roller, 66...Idle roller arm, 68...Running frame, 69...Crawler, 70...Tension shaft, 71...Cover roller, 73...Roller, 76...Hopper sun visor, 77...Sun visor frame, 82...Operator's sun visor, 84...Subcarrier, 85...Assistant's backrest, 86...Pivoting shaft, 88...Radio cover, 90...Vertical shaft portion, 91...Boss support portion.

Claims

1. A work vehicle comprising: an engine (10) for driving various parts of the vehicle mounted on a vehicle frame (1) with its axis running in the left-right direction; a flywheel (20) with its axis running in the left-right direction being mounted inside the engine (10) in the left-right direction and stabilizing the rotation of the engine (10); a housing member (21) having a larger diameter than the flywheel (20) being mounted around the flywheel (20); a pair of front and rear mounting hubs (22) projecting in the fore-and-aft direction of the vehicle being mounted on the front and rear outer peripheries of the housing member (21) at the front and rear of the vehicle; engine-side mount stays (23) being mounted on each of the front and rear mounting hubs (22); and vibration-isolating members (25) being mounted between the engine-side mount stays (23) and frame-side mount stays (24) mounted on the vehicle frame (1).

2. 2. The work vehicle according to claim 1, wherein a left-right mounting support shaft (26) is attached to the engine-side mount stay (23) and the frame-side mount stay (24) in a loose-fit state so that it does not move axially but is not fixed in the radial direction, a vibration-damping member (25) is attached to the mounting support shaft (26) between the engine-side mount stay (23) and the frame-side mount stay (24), and the mounting support shafts (26) of the front and rear engine-side mount stays (23) and the frame-side mount stay (24) are positioned equidistant from the rotation axis (27) of the flywheel (20).

3. A work vehicle as described in claim 1 or 2, characterized in that the traveling device 2 and the harvesting device 4 are mounted on the body frame (1), a traveling drive belt (31) that transmits driving force to the traveling device (2) and a work drive belt (32) that transmits driving force to the harvesting device (4) are mounted on the engine-driven rotating body (30), the vibration-damping member (25) is formed in a left-right width so that it overlaps the engine-driven rotating body (30) and the work drive belt (32) in a plan view, but does not overlap the traveling drive belt (31) and the housing member (21), and the vibration-damping member (25) is positioned forward and rearward of the front and rear ends of the engine (10) body and more inward than the end on the side where the flywheel (20) is provided.

4. 4. A work vehicle according to claim 3, characterized in that an exhaust pipe (35) through which exhaust from the engine (10) passes is provided above the flywheel (20), a mounting protrusion (37) for mounting an exhaust pipe support stay 36 is formed on the upper part of the housing member (21), a belt stopper (38) for protecting the winding area of ​​the travel drive belt (31) and the work drive belt (32) is provided, and a stopper mounting portion (39) is formed on the lower part of the housing member (21), and the stopper mounting portion (39) is formed on the inner periphery of the housing member (21).

5. 3. The work vehicle according to claim 1 or 2, characterized in that an oil pan (43) having an oil drain (42) formed therein for discharging oil from the engine (10) is provided below the engine (10), the oil drain (42) is configured to be closed by a drain bolt (44), a pair of left and right parallel beam members (45) extending in the fore-and-aft direction are arranged at a lateral distance in the lateral center of the body frame (1), and the oil drain (42) is arranged within the lateral distance between the pair of parallel beam members (45).

6. 3. The work vehicle according to claim 1 or 2, characterized in that a control unit (47) is arranged above the engine (10), an oil tank (48), an oil filter (49), and a battery (50) are arranged inside the control unit (47) and further forward of the engine (10) on the vehicle body, the oil tank (48) and the oil filter (49) are arranged on the vehicle body frame (1) located below the control unit (47), a battery stay (51) is detachably arranged above the oil tank (48) and in front of the oil filter (49), and a detachable front cover (53) is provided in front of the space battery (50) in which the oil tank (48), battery oil filter (49), etc. are arranged.

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