JP2006006222A - Engine mounting structure and farm machine equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine mounting structure for farm machines that permits a mowing machine equipped with a four stroke cycle engine to smoothly work as the lubricating oil is sufficiently fed to the engine even on inclined areas, for example, a slope face and provide farm machines equipped with the engine mounting structure. <P>SOLUTION: A mowing machine K is equipped with the mowing machine main body 1 and a handlebar 5. The mowing machine main body 1 has a cover 10 formed with metal plate. A cutter is set to the lower part of the cover 10. On the upper part of cover 10, are attached an engine 2, a clutch box 3 and a transmission box 4 or the like. The engine 2 is arranged to the mowing machine main body 1 with a rotatable mounting device 7 that is set between the guide plate set to lower part and the clutch box 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an engine mounting structure provided in an agricultural machine and an agricultural machine including the same. More specifically, for example, a mowing machine equipped with a 4-cycle engine can be used with sufficient supply of lubricating oil even on slopes such as slopes, and an agricultural machine equipped with the same. .

  For example, one of the agricultural machines is a mower that cuts grass. A mower is generally equipped with an engine (internal combustion engine) and a cutter, and is used when mowing grass on a flat ground such as a farm field or an inclined ground such as a slope.

  As such a mower, there is, for example, a mower invented by the present inventor (see Patent Document 1). This mower has a structure in which a cutter rotates in a substantially horizontal direction and an engine is fixed on a frame above the cutter. A two-cycle engine is used as the engine.

The two-cycle engine exhausts engine oil (hereinafter simply referred to as “oil”) combusted with fuel in the combustion chamber, which is undesirable for the environment, and also has problems of noise and vibration due to high-speed operation.
On the other hand, the 4-cycle engine has less oil discharge to the outside air, and noise and vibration can be reduced than the 2-cycle engine. For this reason, grass mowers equipped with a two-cycle engine are not easily accepted from the market.
JP 2001-238514 A

A mower mounted with a 4-cycle engine can be used without problems when used on a flat ground, as with a 2-cycle engine. However, when used on slopes, there were the following problems.
That is, the 4-cycle engine differs from the 2-cycle engine in that the oil supply method is a structure in which the oil accumulated in the oil sump at the bottom of the engine is scraped by the rotation of the crankshaft, and the oil is supplied to the entire engine by this. Have. For this reason, when the engine itself is tilted on a sloping ground, the oil level in the oil reservoir changes, which can prevent the oil from being scooped up by the crankshaft and eventually burn the engine. there were.
Note that the above problem can be solved even if a four-cycle engine is provided with an oil pump. However, an engine mounted on a mower is usually small, and there are few such engines provided with an oil pump, which is not common. Even if an oil pump is provided, the engine becomes heavier and larger due to an increase in the number of parts, and the cost is also increased. Therefore, a method for solving the problem without using an oil pump is required.

  An object of the present invention is, for example, an engine mounting structure provided in an agricultural machine that enables a mower mounted with a four-cycle engine to be used in a state where the supply of lubricating oil is sufficient even on a slope such as a slope. It is to provide an agricultural machine equipped with it.

Means taken by the present invention to achieve the above object are as follows.
In the first invention,
A four-cycle engine mounting structure provided in an agricultural machine,
The engine is mounted so that the posture changes with respect to the machine body, and when the machine body is tilted, the posture is changed so that the lubricating oil in the oil sump can be scraped up. Features
The engine mounting structure.

In the second invention,
The agricultural machine is capable of traveling, and the engine is configured to be rotatable in a direction intersecting the traveling direction around the power take-out shaft portion or the transmission input shaft portion of the crankshaft. ,
1 is an engine mounting structure according to a first invention;

In the third invention,
A four-cycle engine mounting structure provided in an agricultural machine,
The engine is mounted so as to be rotatable about the power take-off shaft portion of the crankshaft or the transmission input shaft portion with respect to the machine body with a coupling device interposed therebetween. When the machine body is tilted, the engine is rotated so that the lubricating oil in the oil sump can be scraped up.
The engine mounting structure.

In the fourth invention,
It has an engine mounting structure according to the first, second or third invention,
Agricultural machinery.

  Examples of the agricultural machine according to the present invention include, but are not limited to, a mower, a tiller, a transporter, and a harvester.

The attitude of the engine can be changed manually, or it can be changed automatically by detecting or detecting that the machine is tilted. When changing automatically, as the detection means or detection means,
For example, gravity, various sensors, etc. can be mentioned.

(Work)
According to the present invention, since the engine is mounted so that its posture changes with respect to the machine main body, when the machine main body is tilted, the posture can be changed and the oil in the oil sump can be scraped up. .

  According to the present invention, when the machine body is tilted so as to travel along the inclined surface, the engine rotates about the power take-off shaft portion of the crankshaft or the transmission input shaft portion in a direction intersecting the travel direction. .

  If the engine is mounted so that it can rotate around the power take-off shaft part of the crankshaft or the transmission input shaft part with respect to the machine body with the connecting device interposed, by moving the connecting device with the operating means, When the machine body is tilted, the engine can be rotated to scoop up the lubricating oil in the oil sump.

  According to the present invention, when the machine body is tilted, the posture of the engine can be changed so that the lubricating oil in the oil sump can be scooped up. It has the effect of being able to be used without being burned even on slopes such as surfaces.

Embodiments of the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a perspective explanatory view showing an embodiment of a mower having an engine mounting structure according to the present invention,
FIG. 2 is a perspective explanatory view showing a state in which the mower shown in FIG.
FIG. 3 is an enlarged perspective view of a main part showing an engine peripheral part of the mower shown in FIG.
FIG. 4 is an enlarged perspective view of a main part showing an engine peripheral part of the mower shown in FIG.
FIG. 5 is an exploded perspective view showing the engine mounting structure,
FIG. 6 is an explanatory perspective view showing the main body of the mower with the engine and the rotation mounting device removed.
3 and 4 show a state in which the handle is rotated approximately 90 degrees in the horizontal direction (lateral direction) from the position shown in FIGS. 1 and 2 in order to make the engine easier to see.

  Reference symbol K indicates a self-propelled mower that is one of agricultural machines. The mower K includes a mower main body 1 that is a machine main body and a handle 5 that operates the mower main body 1. The mower K can travel forward and backward, and can mow in any direction.

  The mower main body 1 has a cover 10 formed of a metal plate. Around the cover 10, there are provided four wheels 11 constituting the traveling means. The tread portion of the wheel 11 is provided with a protruding spike portion 110 for preventing slippage.

  A cutter (not shown in the figure) constituting the mowing means is provided at the lower part of the cover 10. The cutter is configured to rotate at a high speed in the lateral direction in a state substantially parallel to the mowing surface.

  An engine 2, which is a prime mover, a clutch box 3, a transmission case 4, and the like are provided on the upper portion of the cover 10. The engine 2 is a 4-cycle engine.

  The engine 2 is attached to the mower main body 1 by a rotation attaching device 7 provided between the guide plate 6 provided at the lower portion and the clutch box 3 (see FIGS. 5 and 6). Details of the mounting structure (mounting structure) of the engine 2 to the mower main body 1 will be described later.

  Reference numeral 5 denotes a handle. The handle 5 has a required length, and a position (a position indicated by an imaginary line in FIG. 1) where the length direction is parallel to the traveling direction from a position orthogonal to the traveling direction (a position indicated by a solid line in FIG. 1). ), The base is attached to the mower main body 1 so that it can be rotated by about 90 degrees laterally (see the imaginary line shown in FIGS. 1 and 2).

An operation unit 50 is provided on the upper side of the handle 5. The operation unit 50 includes an engine rotation lever 500, an operation plate 501 and the like. The operation plate 501 is formed with a guide groove 502 extending in the front-rear direction of the handle 5. The engine rotation lever 500 is provided so as to be able to tilt in the front-rear direction of the operation unit 50 through the guide groove 502 so as to penetrate the operation plate 501. Fixing grooves 503 a, 503 b, 503 c, and 503 d for hooking and fixing the engine rotation lever 500 are formed at both ends of the guide groove 502, extending laterally so as to communicate with the guide groove 502. is there.
At the lower end portion of the engine rotation lever 500, the other end portion of the wire C whose one end portion is fixed to a required portion of the rotation mounting device 7 on the engine 2 side is fixed.
The operation of the engine turning lever 500 will be described later.

The structure for mounting the engine 2 to the mower main body 1 (mounting structure) will be described in detail mainly with reference to FIGS.
The guide plate 6 described above has a fixing portion 60 for fixing to the lower portion of the engine 2 and a sliding support portion 61 that is suspended from the fixing portion 60 and has an outer edge formed in an arc shape. . A long hole 610 that is curved along the arc shape of the outer edge portion is formed in the sliding support portion 61.

  The rotation mounting device 7 includes an engine side plate 70 and a clutch box side plate 71. The engine side plate 70 has a shape in which a central portion is formed in a concave shape and a through hole 700 is provided in the central portion. The clutch box side plate 71 has a ring shape (annular shape) in which a central portion is formed in a concave shape and a through hole 714 is provided in the central portion.

  On the inner surface of the engine-side plate 70 on the circumferential side, screw portions 701... That can be screwed with nuts N are provided to protrude at four locations at equal intervals in the circumferential direction. A wire hooking portion 702 for hooking one end of the above-described wire C is formed on one tip side of the screw portion 701 so as to be slightly smaller in diameter than the screw portion 701. Further, in the recessed portion of the engine side plate 70, through holes (reference numerals omitted) are formed at four locations at equal intervals in the circumferential direction. Furthermore, a spring engaging portion 703 for hooking one end of a spring (described later) protrudes from a part of the outer surface of the engine side plate 70 on the circumferential side.

  When the engine 2 is viewed from the left side in FIG. 5, the engine side plate 70 has a crankshaft power so that the spring engagement portion 703 is located at the upper right portion and the wire engagement portion 702 is located at the lower right portion. The take-out shaft portion 20 is passed through the through-hole 700, and the bolt B is screwed into the case of the engine 2 through the through-hole (reference number omitted) to be fixed to the side portion of the engine 2. Reference numeral 25 denotes a member fixed to the power take-off shaft portion 20 that has passed through the through hole 700 and is a clutch structure that transmits power to the internal mechanism of the clutch box 3.

  On the circumferential side of the clutch box side plate 71, elongated holes 710 curved so as to follow the arc shape of the outer edge are formed at four positions at equal intervals in the circumferential direction at positions corresponding to the screw portions 701. It is. Each elongated hole 710 has a length corresponding to an opening angle of about 30 degrees with reference to the center of the clutch box side plate 71. Moreover, the through-holes 711 ... are formed in the recessed part of the clutch box side plate 71 at four places at equal intervals in the circumferential direction. Further, a part of the outer edge of the clutch box side plate 71 is formed with a wire outer fixing portion 712 protruding toward the clutch box 3 and a spring engaging portion 713 protruding toward the engine 2.

  When the clutch box 3 is viewed from the left side in FIG. 6, the clutch box side plate 71 is bolted through the through holes 711... So that the wire outer fixing portion 712 and the spring engaging portion 713 are located at the lower left portion. (Not shown) is fixed to the clutch box 3 by being screwed into a screw hole 30 formed in the clutch box 3.

The engine 2 is mounted on the cover 10 as follows.
First, the guide plate 6 and the engine side plate 70 described above are attached to the engine 2. The clutch box side plate 71 is attached to the clutch box 3. Then, the sliding support portion 61 of the guide plate 6 is aligned with the side surface of the engine mounting portion 100 erected on the cover 10, and the bolt 101 (see FIG. 5) is screwed into the engine mounting portion 100 through the long hole 610. At the same time, the screw portions 701 of the engine side plate 70 are passed through the elongated holes 710 of the clutch box side plate 71, and the washer W and the nut N are screwed into the protruding portion on the clutch box side plate 71 side. To do. At this time, the bolt 101 and the nut N are not screwed in strongly, but are tightened to such an extent that the engine side plate 70 and the clutch box side plate 71 rub and move in the circumferential direction.
Thus, the engine 2 is attached to the cover 10 so as to be rotatable.

  With the engine 2 mounted on the cover 10, the other outer end of the wire C is fixed to the wire outer fixing portion 712. Further, the wire engagement portion 702 that has passed through the long hole 710 is engaged with the tip end side of the wire C that has passed through the outer.

  Further, a spring (a tension spring) S is hooked and attached between the spring engaging portion 703 of the engine side plate 70 and the spring engaging portion 713 of the clutch box side plate 71.

  In a normal state, the engine 2 tilts the engine turning lever 500 and fixes it with the front (rear) side fixing groove 503a and pulls the wire C, thereby arranging the wire hooking portion 702 at a position near the wire outer fixing portion 712. The spring S attached between the spring engaging portions 703 and 713 is in an extended state (a state in which the spring S is urged in a contracting direction), and the crankshaft is in a state where the lubricating oil can be scraped up on a flat ground ( FIG. 1 and FIG. 3).

(Work)
With reference to FIG. 1 thru | or FIG. 6, the usage and the effect | action of the mower K shown in this Embodiment are demonstrated.
The mower K is used in the state shown in FIGS. That is, the engine 10 is used in a state where the cover 10 is horizontal and the crankshaft can scoop up the lubricating oil. The mower K is equipped with a four-cycle engine. In this state, the crankshaft can scoop up the oil, so that the engine 2 can be used without being burned.

  When the mower K travels in a direction orthogonal to or intersecting the slope direction of the slope, it can perform grass cutting work on the slope. In this case, the cover 10 is tilted as shown in FIGS. 2 and 4, and the engine 2 is used in a state where the engine 2 is rotated from the above-described state around the power take-off shaft portion 20 of the crankshaft.

The engine 2 is rotated as follows.
First, the engine rotation lever 500 is tilted from the front (rear) side to the front side and fixed by the front fixing groove 503d. As a result, the tension state of the wire C that has been pulled is relieved, and a free state in which the wire C can be moved to the mower main body 1 side is obtained, and the spring S that has been fixed by the wire C is contracted. In the engine 2, the sliding support portion 61 of the guide plate 6 is moved with respect to the engine mounting portion 100 bolt 101 by the biasing force of the spring S, and the engine side plate 70 is a power take-off shaft portion with respect to the clutch box side plate 71. It rotates about 20 as a center. Thus, the engine 2 is in a state in which the crankshaft can scoop up the lubricating oil in substantially the same manner as when used on flat ground. This rotation of the engine is easily performed smoothly when the engine is operating due to the reaction force of the rotation of the engine itself.

  Thus, according to the mower K, when traveling in a direction orthogonal to or crossing the slope direction of the slope, the engine 2 is rotated with respect to the cover 10 and used in a flat state. Therefore, even when used on slopes, the crankshaft can scoop up the oil. That is, the mower K is equipped with a four-cycle engine, but can be used without being burned even on slopes such as slopes by rotating and changing the state as described above.

  In order to return the rotated engine 2 to the original state, the engine rotation lever 500 may be tilted from the front side to the front (rear) side and fixed by the fixing groove 503a on the front side. As a result, the wire C is pulled and the engine side plate 70 rotates in the opposite direction while rubbing against the clutch box side plate 71, and the spring S is again extended.

  In the present embodiment, the engine 2 tilts the engine turning lever 500 forward from the front (rear) side fixing groove 503a and is fixed by the front fixing groove 503d, but this is not limited. For example, the engine rotation lever 500 can be hooked and fixed to fixing grooves 503b and 503c formed at positions other than both ends of the guide groove 502. Thus, the engine 2 can change the rotation angle in a stepwise manner according to the inclination angle of the slope or the like. Although specific means are not described in the present specification, it is possible to fix the engine at an arbitrary rotation angle by allowing the engine rotation lever 500 to be fixed in a stepless manner.

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

The perspective explanatory view showing the 1 embodiment of the mower which has the mounting structure of the engine which relates to this invention. FIG. 3 is an explanatory perspective view showing a state in which the mower shown in FIG. 1 is tilted. The principal part perspective explanatory drawing which expands and shows the engine peripheral part of the mower shown in FIG. The principal part perspective explanatory drawing which expands and shows the engine peripheral part of the mower shown in FIG. Exploded perspective view showing the mounting structure of the engine. The perspective explanatory view showing the mower main body in the state where the engine and the rotation mounting device are removed.

Explanation of symbols

K Mower B Bolt C Wire N Nut S Spring W Washer 1 Mower main body 10 Cover 100 Engine mounting part 101 Bolt 11 Wheel 110 Spike part 2 Engine 20 Power take-off shaft part 25 Clutch component 3 Clutch box 30 Screw hole 4 Mission case 5 Handle 50 Operation section 500 Engine rotation lever 501 Operation plate 502 Guide groove 503a, 503b, 503c, 503d Fixed groove 6 Guide plate 60 Fixed section 61 Sliding support section 610 Elongated hole 7 Rotation mounting device 70 Engine side plate 700 Through Hole 701 Screw portion 702 Wire hook portion 703 Spring hook portion 71 Clutch box side plate 713 Spring hook portion 710 Long hole 711 Through hole 712 Wire outer fixing portion 713 Spring hook portion 714 Through hole

Claims (4)

A four-cycle engine mounting structure provided in an agricultural machine,
The engine is mounted so that the posture changes with respect to the machine body, and when the machine body is tilted, the posture is changed so that the lubricating oil in the oil sump can be scraped up. Features
Engine mounting structure. The agricultural machine is capable of traveling, and the engine is configured to be rotatable in a direction intersecting the traveling direction around the power take-out shaft portion or the transmission input shaft portion of the crankshaft. ,
The engine mounting structure according to claim 1. A four-cycle engine mounting structure provided in an agricultural machine,
The engine is mounted so as to be rotatable about the power take-off shaft portion of the crankshaft or the transmission input shaft portion with respect to the machine body with a coupling device interposed therebetween. When the machine body is tilted, the engine is rotated so that the lubricating oil in the oil sump can be scraped up.
Engine mounting structure. The engine mounting structure according to claim 1, 2 or 3,
Agricultural machinery.

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