combine

Abstract

Conventionally, 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, resulting in a problem of reduced transmission efficiency of engine output. [Solution] A work vehicle characterized in that an engine 10 that drives various parts of the vehicle is mounted on a body frame 1 with its axis running left and right, a flywheel 20 whose axis runs left and right inside the engine 10 to stabilize the rotation 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 and rear directions of the vehicle are mounted on the front and rear outer periphery 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.

Description

Technical Field

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

Background Art

[0002] Conventionally, an engine mount composed of an elastic member such as rubber is provided between the engine mounting portion of the body frame and the connecting member of the engine body to reduce the vibration of the engine, prevent the durability of the periphery of the engine mounting portion from decreasing, and reduce the vibration of the entire body. This configuration is well-known (Patent Document 1). Due to the action of the drive belt that transmits power to the traveling system and the working system, the engine is pulled forward or backward, preventing insufficient transmission of driving force from the engine due to misalignment.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-known example, due to the need to provide a connecting member on the engine body side, the engine mount is arranged within the front and rear width of the engine, particularly at a position where it wraps around the flywheel mounted on the engine output shaft. Therefore, it is not possible to ensure a wide interval between the axis of the engine output shaft and the front and rear engine mounts. On the other hand, the vertical interval from the axis of the engine output shaft has to be made wide. Therefore, the absorption and reduction of the engine vibration are insufficient, leading to problems such as a decrease in the durability of each part due to vibration and causing extra fatigue to the passengers. In addition, due to the action of the drive belt, if use continues, a slight displacement occurs in the front and rear positions of the engine, resulting in a problem of reduced transmission efficiency of the engine output. This invention solves the aforementioned problems by improving the mounting configuration of the mount, thereby suppressing the transmission of engine vibrations and preventing the engine from shifting its front-to-rear position. [Means for solving the problem]

[0005] The invention described in claim 1 is provided with an engine 10 on the aircraft frame 1 that drives various parts of the aircraft, with its axis direction being in the left-right direction, a flywheel 20 with its axis direction being in the left-right direction to stabilize the rotation of the engine 10 provided on the inside of the engine 10 in the left-right direction, a housing member 21 with a larger diameter than the flywheel 20 provided around the flywheel 20, a pair of front and rear mounting hubs 22 protruding in the front-rear direction of the aircraft provided on the outer circumference of the front and rear of the housing member 21, an engine-side mounting stay 23 provided on each of the front and rear mounting hubs 22, and a vibration damping member 25 provided between the engine-side mounting stay 23 and a frame-side mounting stay 24 provided on the aircraft frame 1 side. A work vehicle characterized by the following: a machine frame 1 is fitted with a traveling device 2 and a harvesting device 4; an engine drive rotating body 30 is fitted with 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; of the pair of front and rear vibration damping members 25 inside the engine 10, the rear vibration damping member 25 is positioned in a position that overlaps with the work drive belt 32 in a plan view, and does not overlap with the traveling drive belt 31 and the housing member 21; and the pair of front and rear vibration damping members 25 inside are positioned in front of and behind the front and rear ends of the engine 10 body, and inside the end on the side where the flywheel 20 is installed. This is the result. The invention described in claim 2 is characterized in that the engine-side mount stay 23 and the frame-side mount stay 24 are fitted together in a way that the left-right mounting support shafts 26 do not move axially but are not fixed radially, 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 at equidistant from the rotation axis 27 of the flywheel 20. Ru's work It is intended as a commercial vehicle. The invention described in claim 3 is characterized in that an exhaust pipe 35 through which the exhaust of the engine 10 passes is provided above the flywheel 20, a mounting projection 37 for attaching 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, 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. Ru's work It is intended as a commercial vehicle. The invention described in claim 4 is characterized in that an oil pan 43 is provided at the bottom of the engine 10, having an oil drain 42 formed therein for draining oil from the engine 10, the oil drain 42 is sealed 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 and right center of the machine frame 1 with a gap between them, and the oil drain 42 is positioned within the gap between the pair of parallel beam members 45. Ru's work It is intended as a commercial vehicle. The invention described in claim 5 is characterized in that a control unit 47 is positioned on top of the engine 10, an oil tank 48, an oil filter 49, and a battery 50 are positioned inside the control unit 47 and in front of the engine 10, the oil tank 48 and oil filter 49 are positioned on the aircraft frame 1 located below the control unit 47, a battery stay 51 is detachably positioned 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 battery 50 in the space where the oil tank 48, battery oil filter 49, etc. are positioned. Ru's work It is intended as a commercial vehicle. [Effects of the Invention]

[0006] In the invention described in claim 1, a flywheel 20 with an axial direction in the left-right direction is provided on the inside of 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 protruding in the front-rear direction of the machine are provided on the outer circumference of the front and rear of the housing member 21, an engine-side mounting stay 23 is provided on each front and rear mounting hub 22, and a vibration damping member 25 is provided between the engine-side mounting stay 23 and a frame-side mounting stay 24 provided on the machine frame 1 side. By providing the engine-side mounting stay 23 on the housing member 21 via each mounting hub 22, the distance at which the vibration damping member 25 is separated from the axis of the engine 10 in the front-rear direction can be increased, improving vibration damping, which in turn suppresses vibration and noise of the machine, reduces operator fatigue, and prevents a decrease in the durability of the machine. In the invention described in claim 2, the left-right mounting shafts 26 are attached to the engine-side mounting stay 23 and the frame-side mounting stay 24 in a loosely fitted state that they do not move axially but are not fixed radially, and a vibration damping member 25 is attached to the mounting shaft 26 between the engine-side mounting stay 23 and the frame-side mounting stay 24, and the mounting shafts 26 of the front and rear engine-side mounting stays 23 and frame-side mounting stays 24 are positioned at equal distances from the rotation axis 27 of the flywheel 20, so by arranging the vibration damping members 25 on the left-right mounting shafts 26 with gaps in the front and rear, minute movements in the front and rear direction due to the driving of the engine 10 can be prevented, and the decrease in transmission efficiency due to changes in engine position is reduced. In the invention described in claim 3, a running device 2 and a harvesting device 4 are mounted on the machine frame 1, a running drive belt 31 that transmits driving force to the running device 2 and a work drive belt 32 that transmits driving force to the harvesting device 4 are mounted on the engine drive rotating body 30, and the vibration damping member 25 is formed to have a width that overlaps with the engine drive rotating body 30 and the work drive belt 32 in a plan view, but does not overlap with the running drive belt 31 and the housing member 21, and the vibration damping member 25 is positioned in front of and behind the front and rear ends of the engine 10 body and inside the end on the side where the flywheel 20 is provided, so that the width of the vibration damping member 25 is reduced, the width of the entire engine 10 is reduced, and a vibration damping effect can be obtained, and by positioning the vibration damping member 25 in front of and behind the front and rear ends of the engine 10 body, the load of the engine 10 is more easily distributed, and the vibration damping effect is improved. 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 projection 37 for attaching the exhaust pipe support stay 36 is formed on the upper part of the housing member 21, a belt stopper 38 is provided to protect the winding area of ​​the travel drive belt 31 and the work drive belt 32, and a stopper mounting portion 39 is formed on the lower part of the housing member 21. Since the stopper mounting portion 39 is formed on the inner circumference of the housing member 21, there is no need to separately form the exhaust pipe support stay 36 or the stopper mounting portion 39 of the belt stopper 38, the number of parts and weight increase is suppressed, vibration of the exhaust pipe due to engine 10 vibration is suppressed, noise is reduced and damage is prevented, and the transmission stoppage due to the drive belt falling off is prevented. In the invention described in claim 5, an oil pan 43 is provided at the bottom of the engine 10, with an oil drain 42 formed therein for draining oil from the engine 10, and the oil drain 42 is sealed 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 and right center of the machine frame 1 with a gap between them, and the oil drain 42 is positioned within the gap between the pair of parallel beam members 45. Because the oil pan 43 is positioned 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, thus improving maintainability. In the invention described in claim 6, a control unit 47 is positioned in front of the engine 10, an oil tank 48, an oil filter 49, and a battery 50 are positioned inside the control unit 47 and in front of the engine 10, the oil tank 48 and oil filter 49 are positioned on the aircraft frame 1 located below the control unit 47, a battery stay 51 is detachably positioned above the oil tank 48 and in front of the oil filter 49, and a battery stay 51 is attached to the front of the space 52 in which the oil tank 48, battery oil filter 49, etc. are positioned. The configuration includes a detachable front cover 53. By removing the front cover 53, the battery 50 and oil tank 48 are exposed, allowing the battery 50 to be replaced and the oil to be refilled from the front of the aircraft, improving maintainability. Furthermore, the battery stay 51 and battery 50 are positioned in front of the oil filter 49, making it difficult for dust and other contaminants to enter the oil filter 49. Additionally, by removing the battery stay 51, the oil filter 49 can be accessed from the front of the aircraft, further improving maintainability. [Brief explanation of the drawing]

[0007] [Figure 1] Side view of a combine harvester. [Figure 2] Front view of the area around the engine. [Figure 3] The same floor plan. [Figure 4] Side view of the same. [Figure 5] Side view of the same. [Figure 6] Front view of the same. [Figure 7] Front view of the same. [Figure 8] The same perspective view. [Figure 9] The same floor plan. [Figure 10] The same perspective view. [Figure 11] Perspective view of the running gear and control unit. [Figure 12] The same perspective view. [Figure 13] The same perspective view. [Figure 14] A perspective view of the area around Idol Laura. [Figure 15] Perspective view, side view, and plan view of the idle roller arm. [Figure 16] Same rear view. [Figure 17] Same operating state diagram. [Figure 18] Side view of the idle roller arm in a state where it is turned upside down. [Figure 19] Rear view of the combine showing the sun visor. [Figure 20] Same perspective view. [Figure 21] Same plan view. [Figure 22] Same perspective view. [Figure 23] Rear view of the combine in a state where the sun visor is stored.

Mode for Carrying Out the Invention

[0008] Explaining one embodiment of the present invention with reference to the drawings, 1 is the body frame of the combine, 2 is the traveling device, 3 is the threshing device provided above the body frame 1, 4 is the harvesting device provided in front of the threshing device 3, 5 is the grain collection part provided on the side of the threshing device 3, and 6 is the control part provided in front of the grain collection part 5 (FIG. 1). For ease of understanding, the directions such as front and rear, left and right, and up and down are shown for convenience based on the traveling direction of the machine body, but the configuration of the present invention is not limited thereby. An engine (diesel engine) 10 for driving each part of the machine body is mounted on the body frame 1. In this embodiment, it is installed below the driver's seat 7 of the control part 6. A cooling fan 12 is provided outside the engine 10 in the traveling direction of the machine body, a radiator 11 is provided outside the cooling fan 12, and a radiator cover 14 having a dust-proof net (not shown) is provided outside the radiator 11.

[0009] A flywheel 20 is provided on the inside of the engine 10 in the left-right direction, with its axis oriented 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 protruding in the front-rear direction of the aircraft are provided on the outer circumference of the front and rear of the housing member 21, and an engine-side mounting stay 23 is provided on each of the front and rear mounting hubs 22, and a vibration-damping member (mounting rubber member) 25 is provided between the engine-side mounting stay 23 and a frame-side mounting stay 24 provided on the aircraft frame 1 side. In other words, 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. At least the inner front and rear pair of vibration damping members 25 are attached to mounting hubs 22 and engine-side mounting stays 23 provided on the outer circumference of the front and rear of the housing member 21 of the flywheel 20. In other words, the conventional inner pair of front and rear vibration damping members were positioned to support the underside of the engine body's oil pan, resulting in a short distance between them and the outer pair of front and rear vibration damping members, and thus poor vibration damping performance.

[0010] In this invention, a housing member 21 is fixedly provided so as to surround the outer circumference 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. This allows for a longer spacing between the left and right protective members 25, thereby improving the vibration damping effect. 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 (to the left in the direction of travel), and the configuration of the housing member 21 is arbitrary, but the housing member 21 is shaped to surround the outer circumference of the side surface of the flywheel 20 on the engine 10 body side, and the outer side portion of the housing member 21 is fixedly attached to the engine 10 body side. Furthermore, by providing the engine-side mounting stay 23 via mounting hubs 22 that protrude in the front-rear direction from the housing member 21, the distance at which the vibration-damping member 25 is separated from the axis of the engine 10 in the front-rear direction can be increased, thereby improving vibration damping performance.

[0011] Improved vibration damping reduces machine vibration and noise, lessening operator fatigue and preventing a decrease in machine durability. In other words, conventionally, in a side view, the vibration damping member 25 is positioned at a location that overlaps with the front-to-rear width of the flywheel mounted on the engine output shaft. As a result, it is not possible to secure a wide gap between the axis of the engine output shaft and the front and rear vibration damping members 25, which reduces vibration damping performance. However, in the present invention, since the vibration damping member 25 is provided on the housing member 21 of the flywheel 20, the front-to-rear gap between the vibration damping members 25 can be widened, improving vibration damping performance. Mounting shafts 26 are attached to the engine-side mounting stay 23 and the frame-side mounting stay 24 in a loosely fitted state, where they do not move axially but are not fixed radially. A vibration damping member 25 is attached to the mounting shaft 26 between the engine-side mounting stay 23 and the frame-side mounting stay 24. The mounting shafts 26 of the front and rear engine-side mounting stays 23 and frame-side mounting stays 24 are positioned at equal distances from the rotation axis 27 of the flywheel 20.

[0012] Specifically, the engine-side mounting stay 23 and the frame-side mounting stay 24 have insertion holes (not shown) that are larger in diameter than the mounting support shaft 26. The mounting support shaft 26 is mounted in the insertion hole in a loosely fitted state where it does not move axially and is not fixed radially, thereby blocking the transmission of vibrations between the engine-side mounting stay 23 and the frame-side mounting stay 24. Therefore, by arranging the vibration-damping members 25 on the mounting support shafts 26 that protrude in the left-right direction, with a gap between them in the front-rear direction, minute movements in the front-rear direction caused by the engine 10's operation can be prevented, and the decrease in transmission efficiency due to changes in engine position is reduced. In other words, by reducing the displacement of the engine 10's position (engine vibration), the magnitude of the vector in a direction different from the transmission direction decreases, resulting in less reduction in transmission efficiency.

[0013] The machine frame 1 is fitted with a traveling device 2 and a harvesting device 4. The engine drive rotating body (pulley) 30 is fitted with 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. The vibration damping member 25 is formed to overlap with the engine drive rotating body 30 and the work drive belt 32 in a plan view, but with a width that does not overlap with the traveling drive belt 31 and the housing member 21. The vibration damping member 25 is positioned in front of and behind the front and rear ends of the engine 10 body, and inside the end on the side where the flywheel 20 is installed.

[0014] In other words, the engine drive rotating body 30 of the engine 10 is formed to be long in the axial direction, and two rotation transmission belts, which transmit rotation to the traveling device 2 and the threshing device 3 respectively, are wrapped around one of the engine drive rotating body 30, and the vibration damping member 25 is arranged to overlap with one of the two belts, but not with the other belt. In other words, by overlapping the mounting components of the engine 10, the amount of inward protrusion of each component relative to the engine body of the engine 10 is reduced, thereby suppressing the overall width of the engine 10. Furthermore, in a plan view, by providing a vibration-damping member 25 inside the flywheel 20 attached to the engine 10, the amount of inward protrusion of the protective suit member 25 from the engine 10 body can be suppressed, and the overall width of the engine 10 can also be suppressed.

[0015] Furthermore, by reducing the displacement of the engine position (engine vibration), the magnitude of the vibration vector in a direction different from the transmission direction becomes smaller, reducing the decrease in vibration transmission efficiency and improving vibration damping. Therefore, by reducing the width of the vibration-damping member 25, it is possible to reduce the overall width of the engine 10 while still achieving a vibration-damping effect. By positioning the vibration-damping members 25 in front of and behind the front and rear ends of the engine 10 body, the load of the engine 10 is more easily distributed, improving the vibration-damping effect. An exhaust pipe 35 through which the exhaust from the engine 10 passes is provided above the flywheel 20, a mounting projection 37 for attaching an exhaust pipe support stay 36 is formed on the upper part of the housing member 21, a belt stopper 38 is provided to protect the winding area of ​​the travel 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.

[0016] In other words, by forming the stopper mounting portion 39 on the "inner circumference" of the housing member 21, the amount of protrusion of the stopper mounting portion 39 can be suppressed. This eliminates the need to separately form the exhaust pipe support stay 36 and the stopper mounting portion 39 of the belt stopper 38, thus reducing the number of parts and weight. The vibration of the engine 10 suppresses the shaking of the exhaust pipe, reducing noise and preventing damage, as well as preventing the drive belt from coming off and stopping the transmission. An oil pan 43 is provided at the bottom of the engine 10, with an oil drain 42 formed therein for draining oil from the engine 10. The oil drain 42 is sealed 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 and right center of the aircraft frame 1, with a gap between them. The oil drain 42 is positioned within the gap between the pair of parallel beam members 45.

[0017] The oil pan 43 is positioned between the left and right sides of the pair of parallel beam members 45, making it easier to attach and detach the drain bolt 44 from below, thus improving maintainability. A control unit 47 is positioned on top of the engine 10, and an oil tank 48, an oil filter 49, and a battery 50 are positioned inside the control unit 47 and in front of the engine 10. The oil tank 48 and oil filter 49 are positioned on the aircraft frame 1 located below the control unit 47, and a battery stay 51 is detachably positioned above the oil tank 48 and in front of the oil filter 49. A detachable front cover 53 is provided at the front of the space 52 where the oil tank 48, battery oil filter 49, etc., are positioned. Removing the front cover 53 exposes the battery 50 and oil tank 48, allowing the battery 50 to be replaced and the oil to be refilled from the front of the aircraft, thus improving maintainability.

[0018] The battery stay 51 and battery 50 are positioned in front of the oil filter 49, making it difficult for dust and other contaminants to enter. Additionally, removing the battery stay 51 allows access to the oil filter 49 from the front of the aircraft, improving maintainability. The configuration of the vibration damping member 25 is arbitrary, but as an example, a pair of engine-side mounting stays 23 are provided on the front and rear of the outer circumference of the mounting hub 22 of the housing member 21 of the engine 10, a frame-side mounting stay 24 is positioned opposite each engine-side mounting stay 23, the base of the frame-side mounting stay 24 is fixed to the aircraft frame 1, both ends of the mounting support shaft 26 are attached to the engine-side mounting stay 23 and the frame-side mounting stay 24 in a loosely fitted state, and the vibration damping member 25 is attached to the mounting support shaft 26. Therefore, vibrations of the engine-side mounting stay 23 originating from the engine 10 are absorbed by the vibration-damping member 25, suppressing the transmission of vibrations to the frame-side mounting stay 24, thereby improving the vibration-damping effect.

[0019] Furthermore, the mounting support shaft 26 is permitted to move in a direction intersecting the axial direction within an insertion hole (not shown) provided in the engine-side mounting stay 23. As a result, although the mounting support shaft 26 is mounted across both the engine-side mounting stay 23 and the frame-side mounting stay 24, the presence of the mounting support shaft 26 prevents vibrations from the engine-side mounting stay 23 from being transmitted to the frame-side mounting stay 24. A mounting hub 22 is provided at a predetermined position in the front-rear direction of a housing member 21 that houses a flywheel 20 installed at the left end of the engine 10. An engine-side mounting stay 23 is attached to the mounting hub 22, and the engine-side mounting stay 23 and a frame-side mounting stay 24 provided on the aircraft frame 1 are connected and held together by a vibration-damping member 25. In conventional vibration isolation configurations for engine 10, the vibration isolation member 25 is provided on the engine 10 side of the portion that is outward in the direction of travel from the housing member 21 of the flywheel 20. As a result, the distance from the engine 10 to the front and rear of the aircraft is short, which presents a problem in that the vibration reduction effect is low.

[0020] By positioning the vibration-damping mounts and vibration-damping members 25 on the left front and rear of the engine 10 inward from the engine 10 body in the direction of travel and spaced apart in the front-rear direction, compared to the conventional configuration, the vibration reduction effect is increased, thereby reducing operator fatigue caused by vibration. This also helps reduce noise and damage caused by engine vibration. In other words, conventionally, the oil pan 43 was supported by the vibration-damping member 25 at the portion outside the housing member 21, resulting in a low vibration damping effect. However, in the present invention, in order to suppress vibrations of the engine 10, the vibration-damping member 25 that supports the engine 10 is provided on the housing member 21. This allows for a wider gap between the vibration-damping member 25 that supports the outside of the engine 10 and the housing member 21, enabling support of the engine 10 over a longer 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 lateral (left-right) direction, thereby mitigating the positional displacement of the engine 10 caused by the tension of the front and rear belts (travel drive belt 31 and work drive belt 32). The left front and rear pair of vibration-damping mounts and vibration-damping members 25 of the engine 10 can be supported at a distance from the engine 10 body, thereby reducing vibration. This reduces operator fatigue caused by vibration. Reduces noise and damage caused by engine vibration. The pair of front and rear vibration-damping members 25 for support are arranged symmetrically with respect to the rotation axis 27 of the flywheel 20. The pair of front and rear vibration damping members 25 on the left side of the engine 10 can be supported at a point further away from the engine 10, thereby reducing vibration. This reduces operator fatigue caused by vibration. It also reduces noise and damage to the engine 10 caused by vibration. The inner front and rear pair of vibration-damping members 25 are arranged symmetrically front to back with respect to the virtual vertical central axis of the engine 10 in a side view.

[0022] Therefore, the left front and rear pair of vibration-damping mounts and vibration-damping members 25 of the engine 10 can be supported at a distance from the engine 10 body, thereby reducing vibration. This reduces operator fatigue caused by vibration. Reduces noise and damage caused by engine vibration. The vibration-damping member 25 is positioned symmetrically with respect to the center of gravity of the engine 10. In other words, the four vibration-damping members 25, one pair at the front and one at the rear and one pair on the left and right, are preferably arranged symmetrically in the front-to-back and left-to-right directions with respect to the center of gravity of the engine 10. Therefore, the pair of front and rear vibration damping members 25 on the left side of the engine 10 can be supported at a point further away from the engine 10, thereby reducing vibration. This reduces operator fatigue caused by vibration. It also reduces noise and damage to the engine 10 caused by vibration. The vibration-damping member 25 is configured to be positioned in a linear manner, overlapping with the engine pulley (drive belt 31) 56, which is installed to the left of the housing member 21 of the flywheel 20 in a plan view.

[0023] Therefore, the left front and rear pair of vibration-damping mounts and vibration-damping members 25 of the engine 10 can be supported at a distance from the engine 10 body, thereby reducing vibration. This reduces operator fatigue caused by vibration. Reduces noise and damage caused by engine vibration. Of the pair of front and rear vibration-damping members 25 on the inside, the rear vibration-damping member 25 is positioned to overlap with the work drive belt 32 which extends to the rear of the machine in a plan view (Figure 3). Therefore, by positioning the inner rear vibration damping member 25 inside the engine 10 relative to the outer vibration damping member 25, the span between the left and right vibration damping members 25 can be increased, thereby improving the vibration damping effect. The vibration-damping member 25 is positioned on the inside of the aircraft in a plan view, close to the drive belt 31 which is positioned from the rear to the front of the aircraft.

[0024] In other words, the drive belt 31 and the vibration damping member 25 are arranged so that they do not overlap when viewed from above. In other words, as shown in Figure 5, the drive belt 31 and the vibration damping member 25 overlap in a side view. Therefore, as shown in Figure 3, the drive belt 31 and the vibration damping member 25 are not made to overlap in a plan view to prevent interference. The vibration-damping member 25 is positioned close to the drive belt 31 located at the rear of the aircraft in a plan view. The vibration-damping member 25 is positioned close to the outer circumference of the flywheel housing member 21 when viewed from the side. In other words, because the flywheel 20 is heavy and rotating, the vibration-damping member 25 that supports the engine 10 can be positioned as close as possible to the heavy flywheel 20 to stabilize the support, and as a result, the engine 10 can be supported stably.

[0025] In a side view, the vibration-damping member 25 is positioned below the outer circumference of the engine drive rotating body 30. Therefore, the vibration-damping member 25 can lower the support position of the engine 10 and stabilize the engine support. The vibration-damping member 25 is positioned outward in the front-rear direction from the front-rear surfaces of the engine 10 body when viewed from the side. Therefore, since the engine 10 can be supported by the vibration-damping member 25 over a long span in the front-to-back direction, the engine 10 can be supported stably, and the vibration effect can be improved. The vibration-damping member 25 is positioned to the left and outward of the left side of the engine 10 body in a plan view. Therefore, since the engine 10 can be supported over a long left-right span, the engine 10 can be supported stably, resulting in vibration suppression.

[0026] An exhaust pipe support stay 36, which connects to the exhaust pipe 35, is provided at the upper end of the outer periphery housing member 21, which houses the flywheel 20 at the left end of the engine 10 (Figure 5). An oil pan 43 is provided at the bottom of the engine 10, with an oil drain 42 formed therein for draining oil from the engine 10. The oil drain 42 is sealed 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 and right center of the aircraft frame 1, with a gap between them. The oil drain 42 is positioned within the gap between the pair of parallel beam members 45 (Figure 7). Therefore, by positioning the oil pan 43 between the left and right sides of the pair of parallel beam members 45, the drain bolt 44 can be attached and detached from below, allowing waste oil disposal to be performed in the space on either side of the parallel beam members 45, thus improving maintainability. This also reduces the number of parts.

[0027] An exhaust pipe 35 through which the exhaust from the engine 10 passes is provided above the flywheel 20, a mounting projection 37 for attaching an exhaust pipe support stay 36 is formed on the upper part of the housing member 21, a belt stopper 38 is provided to protect the winding area of ​​the travel 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. 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 helps to reduce the number of parts and weight. The vibration of the engine 10 suppresses the shaking of the exhaust pipe, reducing noise and preventing damage, as well as preventing the drive belt from coming off and stopping the transmission.

[0028] A control unit (front panel) 47 is positioned in front of the engine 10. Inside the control unit 47, and further forward than the engine 10, an oil tank 48, an oil filter 49, and a battery 50 are positioned. The oil tank 48 and oil filter 49 are positioned on the aircraft frame 1 located below the control unit 47. A battery stay 51 is detachably positioned above the oil tank 48 and in front of the oil filter 49. A detachable front cover (front cover) 53 is provided in front of the battery 50 in the space where the oil tank 48, battery oil filter 49, etc., are positioned. Therefore, by removing the front cover 53, the battery 50 and oil tank 48 are exposed, allowing the battery 50 to be replaced and the oil to be refilled from the front of the aircraft, thus improving maintainability.

[0029] The battery stay 51 and battery 50 are positioned in front of the oil filter 49, making it difficult for dust and other contaminants to enter. Additionally, removing the battery stay 51 allows access to the oil filter 49 from the front of the aircraft, improving maintainability. Furthermore, it improves the temperature environment around the operator's seat (not shown), reduces fatigue during long hours of work, and prevents problems caused by dust and debris on important components. Removing the battery stay 51 exposes the oil tank 48 and oil filter 49, making removal and maintenance easier. The idler roller arm 66 to which the idler roller 65 of the running device 2 is attached is shaped to be able to be installed (mounted) on the running frame 68 of the running device 2 in an up-and-down orientation (reversed), and the installation height of the idler roller 65 at the rear end of the idler roller arm 66 is configured to be changeable, thereby enabling the lower rear end of the crawler 69 to be changed between a normal state and a boat-shaped state.

[0030] In other words, increasing the height of the idler roller 65 changes the lower rear end of the crawler 69 to a boat shape, thereby improving turning performance. Lowering the height of the idler roller 65 returns the lower rear end of the crawler 69 to its normal state, increasing the contact area of ​​the crawler 69 and improving wet field performance. In this case, the idler roller arm 66 is attached to the rear of the tension shaft 70, and the tension shaft 70 is attached to the running frame 68 so as to be movable forward and backward. The axial position of the idler roller arm 66 relative to the tension shaft 70 changes, but the height position of the tension shaft 70 relative to the running frame 68 remains unchanged. Therefore, even with a modified height position for the idler roller 65, the load remains unchanged and strength is maintained.

[0031] When the idler roller 65 is positioned at the top (boat shape), the upper surface of the idler roller 65 does not exceed the upper surface of the upper road wheel 71 located at the front, or is positioned at the same height. In other words, if the upper surface of the idler roller 65 were to exceed the upper surface of the upper road wheel 71, the crawler 69 would be tilted upwards at the rear, bringing it closer to the aircraft frame 1. In this invention, due to the above configuration, interference between the crawler 69 and the machine frame 1 can be prevented. The rear foot 72 connecting the rear end of the running frame 68 and the left and right running frames 68, the idler roller 65 and the idler roller arm 66 of the idler roller 65 are unitized, the running frame 68 at the front of the main body frame 1 is extended to increase the number of road wheels 73, and the front-to-rear length of the running gear 2 and the length of the crawler crawler 69 are freely extended. Therefore, the vehicle configuration can be simplified by making the running gear 2 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 takes the grain stored in the storage hopper 5A into bags (not shown). A hopper sun visor 76 is provided above the storage hopper hopper 5A, and in a front view, the hopper sun visor 76 is positioned with its tip (right side of the machine) tilted upward from the center of the machine when it is extended above the assistant. The hopper sun visor 76 has a light-blocking sheet material 79 stretched over the horizontal frame 78 of the sun visor frame 77 to block light from above the assistant's head. Therefore, a space is created above the assistant, making it easier for them to enter below the hopper sun visor 76, and preventing the accumulation of straw debris and rain on the hopper sun visor 76. Furthermore, in the case of rainwater, etc., it is possible to prevent water from accumulating on the hopper sun visor 76, thus preventing the hopper sun visor 76 from coming off due to the weight of the water and preventing workers from getting soaked. In the case of straw debris, this prevents it from falling onto the workers' heads and also suppresses its accumulation in storage hopper 5A.

[0033] The hopper sun visor 76 above the assistant is configured to be installed with the tip (right side of the aircraft) tilted downward from the center of the aircraft when the hopper sun visor 76 is stowed when viewed from the front. Therefore, it is also possible to configure the hopper sun visor 76 to guide straw debris and rain towards the inside of the aircraft. In a front view, the hopper sun visor 76 is positioned to extend over the assistant, with the tip of the hopper sun visor 76 (right side of the aircraft) tilted upward, gradually increasing in height from the center of the aircraft outwards. 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 located at the front of the aircraft, and the vertical adjustment height range of the hopper sun visor 76 and the operator's sun visor 82 is the same. Therefore, by not allowing the hopper sun visor 76 to protrude too far above the operator's sun visor 82, damage from contact with obstacles can be prevented.

[0034] In a front view, the hopper sun visor 76 is extended over the assistant, and the front end of the hopper sun visor 76 is positioned to be approximately aligned with the rear end of the operator's sun visor 82. The sun visor frame 77 of the hopper sun visor 76, which surrounds the assistant, is installed on the outer upper ends of the front and rear surfaces of the storage hopper 5A. Therefore, the aircraft will be made more compact and easier to store. In a front view, a sub-carrier 84 is provided below the hopper sun visor 76 above the assistant, projecting laterally. An assistant's backrest 85, capable of supporting the assistant's back, is provided at an intermediate vertical position between the hopper sun visor 76 and the sub-carrier 84. The assistant's backrest 85 is attached to the tip of an arm 87 that is rotatably mounted around a pivot axis 86. The pivot axis 86 is positioned inward from the right end of the radio cover 88 on the right side of the aircraft, and is in approximately the same line. Therefore, the aircraft will be made more compact.

[0035] Furthermore, the sub-carrier 84 and the assistant's backrest 85 are configured to be adjustable in height and can be stored (retracted) in an upright position when not in use. In a front view, the pivot axis 86 of the hopper sun visor 76, subcarrier 84, and assistant's backrest 85 above the assistant is positioned inward from the end of the right-hand portion of the harvested grass stalk at the right end of the machine. Therefore, the aircraft can be made more compact. The hopper sun visor 76 is configured such that the vertical shaft portion 90 of the sun visor frame 77 is detachably inserted into and held by boss support portions 91 provided on the front and rear surfaces of the storage hopper 5A. Multiple through holes (not shown) are arranged vertically in the vertical shaft portion 90 (front and rear insertion pipe) of the hopper sun visor 76, and the vertical height can be changed and adjusted by inserting snap pins (not shown) or the like. Therefore, the height adjustment of the Hopper Sun Visor 76 can be made easier. Furthermore, the hopper sun visor 76 can be stored above the storage hopper 5A by changing the orientation of the sun visor frame 77. [Explanation of symbols]

[0036] 1...Machine frame, 2...Traction mechanism, 3...Threshing mechanism, 4...Harvesting mechanism, 5...Grain collection section, 6...Control section, 7...Driver's seat, 10...Engine, 12...Cooling fan, 14...Radiator cover, 20...Flywheel, 21...Housing component, 22...Mounting hub, 23...Engine-side mounting stay, 24...Frame-side mounting stay, 25...Vibration damping component, 26...Mounting support shaft, 27...Rotating shaft, 30...Engine drive rotating body, 31...Traction drive belt, 32...Work drive belt, 35...Exhaust pipe, 36...Exhaust pipe support stay, 37...Mounting protrusion, 38...Belt stopper, 39...Stopper mounting part, 42...Oil drain, 43...Oil pack 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...Idler roller, 66...Idler roller arm, 68...Traction frame, 69...Crawler, 70...Tension shaft, 71...Upper road wheel, 73...Road wheel, 76...Hopper sun visor, 77...Sun visor frame, 82...Operator's sun visor, 84...Subcarrier, 85...Assistant's backrest, 86...Rotating shaft, 88...Radio cover, 90...Longitudinal shaft section, 91...Boss support section.

Claims

1. An engine (10) that drives various parts of the aircraft is mounted on the aircraft frame (1) with its axis oriented in the left-right direction. A flywheel (20) with its axis oriented in the left-right direction is provided on the inside of the engine (10) 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) protruding in the front-rear direction of the aircraft are provided on the outer circumference of the front and rear of the housing member (21). An engine-side mounting stay (23) is provided on each of the front and rear mounting hubs (22). A vibration damping member (25) is provided between the engine-side mounting stay (23) and a frame-side mounting stay (24) provided on the aircraft frame (1). A work vehicle characterized in that a running device (2) and a harvesting device (4) are mounted on a machine frame (1), a running drive belt (31) that transmits driving force to the running device (2) and a work drive belt (32) that transmits driving force to the harvesting device (4) are mounted on an engine drive rotating body (30), and of a pair of front and rear vibration damping members (25) inside the engine (10), the rear vibration damping member (25) is positioned in a position that overlaps with the work drive belt (32) in a plan view, and does not overlap with the running drive belt (31) and the housing member (21), and the pair of front and rear vibration damping members (25) inside are positioned in front of and behind the front and rear ends of the engine (10) body, and inside the end on the side where the flywheel (20) is installed.

2. The work vehicle according to claim 1, characterized in that the engine-side mounting stay (23) and the frame-side mounting stay (24) are fitted together in a way that the left-right mounting support shafts (26) do not move axially but are not fixed radially, a vibration damping member (25) is attached to the mounting support shaft (26) between the engine-side mounting stay (23) and the frame-side mounting stay (24), and the mounting support shafts (26) of the front and rear engine-side mounting stays (23) and frame-side mounting stays (24) are positioned at equal distances from the rotation axis (27) of the flywheel (20).

3. The work vehicle according to claim 1, characterized in that an exhaust pipe (35) through which the exhaust of the engine (10) passes is provided above the flywheel (20), a mounting projection (37) for attaching an exhaust pipe support stay (36) is formed on the upper part of the housing member (21), a belt stopper (38) is provided to protect the winding area of ​​the travel 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).

4. A work vehicle according to any one of claims 1 to 3, characterized in that an oil pan (43) with an oil drain (42) for draining oil from the engine (10) is provided at the bottom of the engine (10), the oil drain (42) is sealed by a drain bolt (44), a pair of left and right parallel beam members (45) extending in the front-rear direction are arranged with a gap between them at the left and right center of the machine frame (1), and the oil drain (42) is positioned within the gap between the left and right parallel beam members (45).

5. A work vehicle according to any one of claims 1 to 3, characterized in that a control unit (47) is positioned on top of the engine (10), an oil tank (48), an oil filter (49), and a battery (50) are positioned inside the control unit (47) and in front of the engine (10), the oil tank (48) and oil filter (49) are positioned on the aircraft frame (1) located below the control unit (47), a battery stay (51) is detachably positioned 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 battery (50) in the space where the oil tank (48), battery oil filter (49), etc. are positioned.

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