JP5650972B2 - Mowing machine - Google Patents

Description

  The present invention relates to a mowing machine. More specifically, it has a simpler and lighter structure than the conventional one that keeps the engine level according to the slope of the slope, so that it is easy to maintain and is easy to maintain and mowing on the slope. The present invention relates to a mowing machine that prevents falling during work and improves safety by stabilizing traveling while preventing a falling moment from increasing.

  Agricultural working machines equipped with an engine, such as a mowing machine, sometimes work on slopes such as slopes as well as flat ground. In general agricultural work machines, because the heavy engine is fixed on the chassis, if the work machine is tilted on a sloping ground, the weight balance becomes worse and it becomes difficult to control during running. Sufficient attention was required to carry out the work.

  Therefore, the mount part of the engine is movable, and the center of gravity of the engine is moved according to the slope of the slope to balance the weight, and the supply of engine lubricating oil is stable not only on flat ground but also on slopes such as slopes. Agricultural working machines such as mowing machines have been proposed so that work can be performed safely. As such an agricultural working machine, for example, there is an agricultural machine (mowing machine) disclosed in Patent Document 1 proposed by the present applicant.

  This mower has a mower body and a handle, the mower body has a cover, a cutter is provided at the bottom of the cover, a 4-cycle engine, a clutch box, a transmission case, etc. are provided at the top of the cover. Is rotatably attached to the cover by a rotation attachment device provided between the guide plate provided in the lower part and the clutch box, so that the engine is always kept horizontal, A mower equipped with a 4-cycle engine can be used with sufficient supply of lubricating oil even on sloping ground.

JP2006-6222

  The agricultural machine described in Patent Document 1 achieves the purpose of allowing an agricultural machine such as a mower equipped with a 4-cycle engine to be used in a sufficiently supplied state of lubricating oil even on slopes such as slopes. It is useful enough for that. However, the following problems and room for improvement have also been found.

  In other words, if the mount portion of the four-cycle engine is movable, the structure becomes complicated, which is likely to cause failure, and considerable maintenance is required. In addition, since the structure is complicated and the number of parts increases, the weight increases accordingly, and there is still a problem that it is still difficult to balance the weight particularly in the work on the slope where the tilt angle is large.

(Object of the present invention)
The present invention has a simpler and lighter structure than the conventional one in which the four-cycle engine is kept horizontal in accordance with the inclination of the inclined ground, thereby making it difficult to cause a failure and easy maintenance. Provided is a mowing machine that improves the safety by preventing the falling of the mowing machine during work by stabilizing the traveling so that the overturning moment does not increase during the mowing work.

(1) The present invention
The chassis,
An engine mounted on the chassis,
A cutter for mowing driven by the engine;
An operation handle that can change the axial direction at a required angle from a direction parallel to the traveling direction in a plan view to a direction intersecting the traveling direction;
A cover that is provided in front of or behind the cutter in the direction of travel of the mowing machine, and stops scattering of the mowing grass;
A cover opening / closing means that closes the cover when the axial direction of the operation handle is parallel to the traveling direction of the mower, and rotates the operation handle to open the cover when the axial direction intersects the traveling direction;
With
The cylinder of the engine is inclined at a required angle at an acute angle with respect to the direction of the chassis on the side where the axial direction of the cylinder changes to a direction where the axial direction of the operation handle intersects the traveling direction.
Mowing machine.

(2) The present invention
The engine is a four-cycle engine, an oil reservoir chamber for storing lubricating oil is provided below the cylinder of the engine, and the oil reservoir chamber is provided with a gauge tube that also serves as a lubricating oil inlet.
It is the mowing machine of said (1).

(3) The present invention
A lubricating oil inlet for injecting lubricating oil into the oil reservoir chamber is formed at the tip of the gauge tube that extends upward from the oil reservoir chamber to a required length,
It is the mowing machine of said (2).

(4) The present invention
The angle of the axis of the cylinder of the engine is set within a range of 40 ° to 50 ° with respect to the direction of the chassis,
The mowing machine according to (1), (2), or (3).

(5) The present invention
It has a fuel tank, and the fuel inlet of the fuel tank is formed at the tip of an extension pipe that extends upward to the required length.
The mowing machine according to (1), (2), (3) or (4).

(Delete)

(Function)
The operation of the mowing machine according to the present invention will be described. Here, the constituent elements used in the description are assigned in correspondence with the reference numerals given to the respective parts in the embodiments described later. These reference numerals are the same as the reference numerals described in the claims of the claims. Similarly, it is only for the purpose of facilitating understanding of the contents, and the meaning of each component is not limited to the above-described parts.

The mowing machine can perform the mowing work even when the grassland is a flat land such as a riverbed or an inclined land such as a slope of a bank.
When mowing work on a horizontal or nearly horizontal grassland using a mowing machine, make sure that the axis of the operation handle (6) is parallel to the direction of travel in plan view while moving the mowing machine forward. To.
At this time, the chassis (1) is horizontal or almost horizontal, and the cylinder of the engine (2) is inclined at a required angle at an acute angle with respect to the direction of the chassis (1), but the oil reservoir (21 The lubricating oil in () can be scraped and refined by a claw member (not shown) attached to the rotating crank. As a result, the lubricating oil is supplied to the inside of the cylinder, the crankshaft, etc., and the movable parts in the engine (2) are sufficiently lubricated and cooled, so that the engine (2) operates smoothly.

  Further, when the mowing work is performed using the mowing machine, the axis direction of the operation handle (6) intersects the traveling direction from the direction parallel to the traveling direction in the plan view, for example, a right angle. Change direction to direction and fix at that angle. The direction of travel of the mowing machine is usually a direction perpendicular to the direction of inclination of the grassland, and travels on a portion of the grassland that is approximately the same height.

  The operation handle (6) is rotated at least on the same side as the side where the cylinder of the engine (2) is inclined. Therefore, the operator who operates the operation handle (6) works on the inclined grassland while standing on the upper side of the mowing machine. Further, the operation handle (6) may be rotatable to the side opposite to the side where the cylinder of the engine (2) is inclined.

  At this time, the chassis (1) is parallel or substantially parallel to the inclined grassland, and the engine (2) is the side where the axial direction of the cylinder changes the axial direction of the operating handle (6) (the operating handle (6) in plan view). For example, the angle of the axis is in the range of 40 ° to 50 ° so as to form an acute angle with respect to the direction of the chassis (1) in the direction in which the direction of the axis intersects the traveling direction.

  That is, the axial direction of the cylinder moves by, for example, 30 ° in the direction in which the angle of the axis rises with respect to the horizontal direction (when the inclination angle of the grass is 30 °). If the angle is “70 ° to 80 °” close to (gravity direction) and moves 40 ° (when the inclination angle of the grass is 40 °), the angle “80 ° to 90 ° closer to the vertical line direction or the vertical line direction” "become.

  In this way, in the mowing work on an inclined ground, the axial direction of the cylinder of the engine (2) of the inclined mowing machine approaches the vertical line direction, so that the overturning moment can be prevented from increasing, The weight balance is easy to balance, and the mowing machine is stable and less likely to fall, so safety is improved.

  Even when the axial direction of the cylinder of the engine (2) is close to the vertical direction, the liquid level of the lubricating oil in the oil sump chamber (21) remains at normal working conditions (for example, 40 ° to 50 ° from the flat ground). In the case of a sloping ground), the rotating crank is at a height that can be contacted. As a result, refinement by scraping up the lubricating oil and supply of the refined lubricating oil to the inside of the cylinder of the engine (2), the crankshaft, etc. are sufficiently performed. Since each movable part can be lubricated and cooled without hindrance, the engine (2) operates smoothly.

  Further, the conventional mechanism for keeping the engine level in accordance with the inclination of the slope is not required, and therefore, the structure is simple and light, and it is difficult to cause a failure and easy to maintain.

A fuel tank (24) is formed at the tip of the extension pipe (25) with the fuel inlet of the fuel tank (24) extended upward to the required length. Even if the cap (26) attached to the fuel inlet is loosened during work, the fuel level is usually lower than the fuel inlet of the extension pipe (25), thus preventing fuel leakage. be able to.
If it is necessary to refuel with the mowing machine tilted, if the highest part inside the fuel tank (24) is lower than the height of the fuel inlet at the tip of the extension pipe (25), the fuel tank (24) can be refueled to almost full capacity.

  What is formed at the tip of the gauge pipe (22) in which the lubricating oil inlet for injecting lubricating oil into the oil reservoir (21) is extended to the required length obliquely upward from the oil reservoir (21), When the mowing machine is placed on a flat ground, the amount of lubricating oil that can be injected into the oil sump chamber (21) can be increased compared to the case where the gauge pipe is short as in the prior art.

  As a result, the level of the lubricating oil in the oil reservoir (21) becomes higher, so even if there is a slight change in the inclination of the liquid with the change in the inclination of the grassland, the oil reservoir (21) The lubricating oil is scraped and refined by the rotating crank so that it is sufficiently supplied to the inside of the cylinder of the engine (2), crankshaft, etc., and each movable part in the engine (2) Therefore, the engine (2) operates smoothly.

  In the direction of travel of the mowing machine, there is a cover to stop the scattering of the mowing grass in front of or behind the cutter (7, 7a), and the cover is placed when the axial direction of the operating handle is parallel to the direction of movement of the mowing machine. Close and rotate the operation handle so that the cover opens and closes when the direction of the axis intersects the direction of travel.If the operation handle (6) has an axis direction parallel to the direction of travel of the mower In the normal forward state, the cover (73) is closed, so that, for example, when the cutter (7, 7a) bounces off pebbles, etc. When the operating handle (6) is rotated during traveling and the axis direction intersects the traveling direction and the operator's position changes, the cover (73) opens and the grass is efficiently discharged to the rear without the operator. it can.

The present invention has a structure in which the axial direction of the cylinder of the engine is inclined at a required angle at an acute angle with respect to the direction of the chassis on the side where the axial direction of the operating handle changes to the direction intersecting the traveling direction. For example, mowing can be performed without hindrance even when the land is flat, such as a riverbed, or when the land is sloped, such as a dike slope. Therefore, a conventional mechanism for keeping the engine level in accordance with the inclination of the slope is not required, and therefore, the structure is simple and light, and it is difficult to cause a failure and easy to maintain.
Further, the mowing machine of the present invention can easily maintain a weight balance and stabilize traveling because the tipping moment does not increase when the axial direction of the cylinder approaches the vertical direction during mowing work on an inclined land. Thereby, since the fall of the mowing machine during a work can be prevented, safety can be improved.

The rear perspective view which shows one Embodiment of the mowing working machine which concerns on this invention. The front perspective view of a mowing machine. The rear perspective view which shows the state which rotated the operating handle of the mowing working machine in the direction orthogonal to the advancing direction. Explanatory drawing which shows the state which is performing the mowing work in the inclined grassland.

The present invention will be described in detail based on the embodiments shown in the drawings.
Please refer to FIG. 1 to FIG.
The mowing machine A includes a chassis 1, an engine 2 mounted on the upper side of the chassis 1, front wheels 3 and rear wheels 4 as drive wheels, and power transmission that transmits the power of the engine 2 to the front wheels 3 and rear wheels 4. A system 5 and an operation handle 6 are provided. Two horizontal rotary cutters 7 and 7a (see FIG. 4) are arranged in parallel on the lower side of the chassis 1.

  The engine 2 is a four-cycle engine and has a cylinder block 20. It is attached so that the axial direction of the cylinder (not visible in the figure) in the cylinder block 20 is inclined at an angle of 40 ° with respect to the direction of the chassis 1 (the horizontal direction when the mowing machine A is placed on a horizontal plane). (See FIGS. 1 and 4). Further, the inclination direction of the cylinder is set to 90 ° (direction orthogonal) to the right side with respect to the traveling direction (forward direction) of the mowing machine A in plan view. The engine 2 is a single cylinder in the present embodiment, but an engine having two or more cylinders may be employed. In addition to a 4-cycle engine, a 2-cycle engine may be employed.

  Below the cylinder of the engine 2 is provided an oil reservoir chamber 21 for storing lubricating oil. A gauge tube 22 having a required length is formed on the bottom of the oil reservoir chamber 21 outside the portion intersecting with the axial direction of the cylinder so as to face obliquely upward when the chassis 1 is in the horizontal direction. The gauge tube 22 has a circular tube shape and is formed to be longer than a normal tube. A lubricating oil inlet (not visible in the figure) is provided at the tip of the gauge tube 22. A gauge 23 for measuring the amount of oil in the oil reservoir 21 is inserted into the gauge tube 22 so as to liquid-tightly seal the lubricating oil inlet.

  Further, even when the mowing machine A is inclined at a required angle in the direction in which the cylinder of the engine 2 rises, the liquid level of the lubricating oil accumulated in the oil reservoir 21 remains under normal working conditions (for example, 40 If it is a slope of about 50 ° to 50 °), it is at a height at which the rotating crank can contact. As a result, refinement by scraping up the lubricant and supply of the refined lubricant to the inside of the cylinder of the engine 2 and the crankshaft, etc. are sufficiently performed. Since the lubrication and cooling can be performed without hindrance, the engine 2 operates smoothly.

  A fuel tank 24 is attached to the upper side of the chassis 1 adjacent to the engine 2. In the upper part of the fuel tank 24, a circular tube-shaped extension pipe 25 having a required length is provided upward in the vertical direction when the chassis 1 is in the horizontal direction. A fuel inlet (not visible in the figure) is provided at the distal end of the extension pipe 25, and a cap 26 is attached to the fuel inlet.

  The operation handle 6 has a required length, and is attached to the rear side of the chassis 1, that is, the side opposite to the traveling direction (forward direction) of the mowing machine A. The operation handle 6 is provided with various operation parts (reference numerals omitted) at the front part (the hand side). The operation handle 6 is attached so that the base end portion can be rotated at a required angle in the vertical direction and the horizontal direction. The horizontal angle in the axial direction of the operation handle 6 is configured to be adjustable in a range from 90 ° on the left side to 90 ° on the right side with respect to the traveling direction (forward direction) of the mowing machine A.

  In addition, the chassis 1 is provided with covers at four locations on the front and rear and the left and right around the cutters 7 and 7a. Covers are provided between the side covers 70 and 71 provided on both the left and right sides in the advancing direction (forward direction) of the mowing machine A of the chassis 1 so as to protrude outward from the front wheels 3 and the rear wheels 4, and the front wheels 3. And a rear cover 73 provided between the rear wheels 4. The front cover 72 is made of deformable rubber. The rear cover 73 is composed of a metal upper cover 730 that can be moved up and down in the vertical direction around an upper shaft support (not shown), and a deformable rubber lower cover 731 attached to the lower part thereof. It is configured.

  The rear cover 73 has a structure that can open and close the rear side (opposite to the traveling direction) of the cutters 7 and 7a by moving up and down in the vertical direction. Further, the elevating / closing mechanism is interlocked with the movement of the operation handle 6 that rotates in the horizontal direction. Specifically, a wire hanging tool 60 is provided at the lower part on the base side of the operation handle 6, and a wire hanging tool 74 is provided at the center in the width direction of the lower part of the upper cover 730 of the rear cover 73. The wire hook 74 is connected by a pull wire 61. The wire hooks 60 and 74 and the pulling wire 61 constitute cover opening / closing means. The cover opening / closing means is not limited to the present embodiment, and various known means can be adopted as long as the operation handle 6 and the rear cover 73 can be interlocked as described above.

  The positions of the wire hooks 60 and 74 and the length of the pulling wire 61 are as shown in FIG. 1 when the axial direction of the operation handle 6 is parallel to the traveling direction of the mowing machine A (normal forward state). When the rear cover 73 is lowered to close the rear side of the cutters 7 and 7a, and the axial direction of the operation handle 6 is perpendicular to the traveling direction of the mowing machine A, the rear cover 73 is raised as shown in FIG. Thus, the rear side of the cutters 7 and 7a is set to be opened at a required opening degree.

  That is, when the axial direction of the operation handle 6 is parallel to the traveling direction of the mowing machine A and in a normal forward state, the rear cover 73 is closed, so that, for example, when the cutters 7 and 7a bounce off pebbles and the like. When the operator behind the mowing machine A is made safe and the operation handle 6 is rotated by traveling on an inclined ground so that the axis direction intersects the traveling direction and the position of the operator is changed, the rear cover 73 is moved. It is open so that the mowing grass can be discharged efficiently without workers. Moreover, when the advancing direction of the mowing machine A is changed to a direction in which the rear cover 73 is on the front side, there is an advantage that the resistance of the incoming grass can be reduced when the rear cover 73 is opened. Thereby, in the mowing work on the sloping ground, the load applied to the cutters 7 and 7a and the engine 2 can be reduced by the resistance of the mowing grass that is easily scattered and accumulated inside the covers 70, 71, 72, and 73.

(Function)
The operation of the mowing machine A will be described with reference to FIGS.
When performing mowing work on a horizontal or almost horizontal grassland using the mowing work machine A, the mowing work machine A is moved forward while the axial direction of the operation handle 6 is parallel to the traveling direction in plan view. To. At this time, the chassis 1 is horizontal or substantially horizontal, and the cylinder of the engine 2 is inclined at an angle of 40 ° with respect to the direction of the chassis 1 as described above. However, as described above, the lubricating oil in the oil reservoir 21 is The engine 2 is scraped and refined by the rotating crank, and is sufficiently supplied to movable parts such as the inside of the cylinder and the crankshaft, so that the engine 2 operates smoothly.

  When the mowing machine A is used, for example, when mowing a grassland tilted by 40 °, the axis direction of the operation handle 6 is first parallel to the traveling direction in plan view when working on the flat ground. Then, change the direction to the side where the cylinder of the engine 2 is inclined and the direction perpendicular to the traveling direction, and fix at that angle. As a result, the place where the worker walks is changed to a place higher than the mowing machine A of the inclined grassland, and as described above, the rear cover 73 is pivoted upward and the cut grass is discharged to the rear side. .

  Further, the traveling direction of the mowing machine A is normally a direction perpendicular to the inclination direction of the grassland, and travels on a portion of approximately the same height in the grassland. At this time, the tilting direction of the chassis 1 is parallel or substantially parallel to the inclined grassland, and the engine 2 is on the side where the axial direction of the cylinder changes from the axial direction of the operating handle 6 (the axial direction of the operating handle 6 advances in plan view). In the direction intersecting the direction), the cylinder is inclined at 40 ° with respect to the direction of the chassis 1, so that the axis direction of the cylinder moves 40 ° in the direction in which the angle of the axis rises with respect to the horizontal direction, It becomes 80 ° which is an angle close to the vertical direction.

  In this way, in the mowing work on the inclined ground, the axis direction of the cylinder of the engine 2 of the inclined mowing machine A is closer to the vertical direction, so that it becomes easier to balance the weight during the work and the mowing machine A travels. Since it is stable and difficult to fall, safety is improved. In addition, it has a simpler and lighter structure than the conventional one that keeps the engine level in accordance with the inclination of the inclined ground, so that it is difficult to cause a failure and maintenance is easy.

  Since the fuel inlet of the fuel tank 24 is formed at the tip of an extension pipe 25 extending upward from the fuel tank 24, the cap 26 attached to the fuel inlet is used in mowing work on an inclined land. Even if it loosens inside, the fuel level is usually lower than the fuel inlet of the extension pipe 25, so that leakage of the fuel can be prevented. Further, when it is necessary to perform refueling while the mowing machine A is tilted, if the highest part inside the fuel tank 24 is lower than the height of the fuel inlet at the tip of the extension pipe 25, the capacity of the fuel tank 24 is increased. There is also an advantage that it can be refueled to almost full.

  Further, since the lubricating oil inlet for injecting lubricating oil into the oil reservoir chamber 21 is formed at the tip of the gauge tube 22 that extends obliquely upward from the oil reservoir chamber 21 to the required length, the mowing machine A When placed on a flat ground, the amount of lubricating oil that can be injected into the oil sump chamber 21 can be increased as compared to a conventional case where the gauge pipe is short.

  Thereby, the liquid level of the lubricating oil in the oil reservoir 21 can be made higher. Therefore, even if there is a change in the inclination of the liquid level due to the change in the inclination of the grassland, the liquid level of the lubricating oil will rotate under normal working conditions (for example, an inclined area of about 40 ° to 50 ° from the flat ground). The height of the crank that can be touched. As a result, refinement by scraping up the lubricant and sufficient supply of the refined lubricant to the inside of the cylinder of the engine 2 and the crankshaft, etc., are hindered and lubrication and cooling of each movable part in the engine 2 is hindered. Therefore, the engine 2 operates smoothly.

  Note that the terms and expressions used in this specification are merely explanatory and are not limiting at all, and terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to exclude. Further, it goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

A Mowing machine 1 Chassis 2 Engine 20 Cylinder block 21 Oil reservoir 22 Gauge pipe 23 Gauge 24 Fuel tank 25 Extension pipe 26 Cap 3 Front wheel 4 Rear wheel 5 Power transmission system 6 Operation handle 60 Wire hook 61 Pulling wire 7, 7a Cutter 70, 71 Side cover 72 Front cover 73 Rear cover 730 Upper cover 731 Lower cover 74 Wire hook

Claims (5)

Chassis (1),
An engine (2) mounted on the chassis (1);
A mowing cutter (7, 7a) driven by the engine (2);
An operation handle (6) capable of changing the axial direction at a required angle from a direction parallel to the traveling direction in a plan view to a direction intersecting with the traveling direction;
A cover (73) that is provided in front of or behind the cutter (7, 7a) in the direction of travel of the mower, and stops scattering of the mowing grass;
When the axial direction of the operation handle (6) is parallel to the traveling direction of the mowing machine, the cover (73) is closed, and when the operating handle (6) is rotated, the axial direction intersects the traveling direction. Cover opening and closing means (61) for opening the cover (73)
With
The cylinder of the engine (2) is inclined at a required angle at an acute angle with respect to the direction of the chassis (1) on the side where the axial direction of the cylinder changes to a direction where the axial direction of the operation handle (6) intersects the traveling direction. Let me
Mowing machine. The engine (2) is a four-cycle engine, and an oil reservoir chamber (21) for storing lubricating oil is provided below the cylinder of the engine (2), and the oil reservoir chamber (21) is filled with lubricating oil. A gauge tube (22) that also serves as an inlet is provided,
The mowing machine according to claim 1. Lubricating oil inlet for injecting the lubricating oil said to the oil reservoir chamber (21) is formed at the tip portion of the oil reservoir chamber gauge tube is extended to the required length upward from the (21) (22),
The mowing machine according to claim 2. The angle of the axis of the cylinder of the engine (2) is set within a range of 40 ° to 50 ° to the direction of the chassis,
The mowing machine according to claim 1, 2 or 3. It has a fuel tank (24), and a fuel inlet of the fuel tank (24) is formed at the tip of an extension pipe (25) extended upward to a required length.
The mowing machine according to claim 1, 2, 3, or 4.

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