JPH085294Y2 - Splash type lubricator for horizontal axis engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a splash type lubrication device for a horizontal axis engine having a crankshaft arranged in a horizontal direction, which can obtain a large amount of effective lubricating oil even when the engine is tilted. I will provide a.

<Prior Art> The basic structure of the splash-type lubrication device for a horizontal shaft engine, which is the subject of the present invention, has a large end of a connecting rod 2 in a crank chamber 1 of a horizontal engine E as shown in FIG. 1 or 4. The oil spun 4 is projected downward from the portion 3, and the oil spun 4 is rotated with the rotation of the crankshaft 5 to scrape up the oil in the oil pan 6 into the crank chamber 1.
Above the upper limit prescribed oil level A of the oil in the oil pan 6, from the rotation surface B of the oil spun 4 to the axial direction C of the crankshaft 5.
It is of a type in which the rotating body 8 is arranged at a position that is biased to.

As shown in FIG. 4, the conventional technique of this type is as follows.
The rotating body 8 is an idle gear 51 supported by being meshed with the lower side of the crank gear 50, and the oil spun 4 is thrust into the lower oil pan 6 from an opening 24 formed in a corrugation prevention plate 23 provided in the crank case 20. There are things that let me sink under the oil surface.

<Problems to be Solved by the Invention> In the above conventional technique, the engine E is the crankshaft 5
When tilted in the front-back direction (see the inclined surface P), the oil surface of the oil pan 6 is biased to the front or rear from the rotation surface B of the oil spun 4, and the oil spun 4 cannot scrape up the oil.
There is a high possibility that the engine E will run out of lubrication.

An object of the present invention is to ensure a sufficient amount of lubricating oil even when the horizontal axis engine is tilted in the crankshaft direction. Moreover, this invention makes it a technical subject to prevent wasteful consumption of lubricating oil.

<Means for Solving the Problems> Means for solving the above problems will be described below with reference to the drawings corresponding to the embodiments.

That is, the present invention relates to a splash-type lubricating device for a horizontal axis engine having the above-mentioned basic structure, in which a partition wall for wave prevention is provided below the rotating body (8) to partition the crank chamber (1) from an oil pan (6). 23) is provided in the left and right direction of the crankcase (20), and an oil reservoir (10) for tilting is provided in a part of the partition wall (23). In the rotating body side inclined state (P) in which the oil body (8) is tilted toward the rotating body (8) side, the oil level of the stored oil is higher than the lower end portion (11) of the rotating body (8). On the other hand, in the upright state (Q) of the engine (E), the oil is not stored, or even if the oil is stored, the oil level of the oil is lower than the lower end (11) of the rotating body (8). It is characterized by being formed into a shape.

<Operation> Since the partition wall (23) for separating the crank chamber (1) from the oil pan (6) is provided in the left and right direction of the crankcase (20), (1) the engine (E) If you suddenly incline a lot,
Even if the oil in the oil pan (6) tries to flow out into the crank chamber (1), it is blocked by the partition wall (23), and in such a case, the oil in the oil pan (6) enters the crank chamber (1). It does not flow out in large quantities.

Here, the oil supplied into the crank chamber (1) is
A part of the blow-by gas is discharged to the outside of the crank chamber (20), and the rest is returned to the oil pan (6). If oil unexpectedly flows into the crank chamber (1). The concentration of mist in the crank chamber (1) increases accordingly, and the blow-by gas rides on the crank chamber (1).
The amount of oil discharged to the outside also increases.

However, in the present invention, as described above, the partition wall (2
Since it has 3), even if the engine (E) is steeply inclined, a large amount of oil in the oil pan (6) does not unexpectedly flow into the crank chamber (1), so that the oil is wasted. Can be prevented from being consumed.

In addition, the partition wall (2 provided below the rotating body (8)
Since the oil sump (10) for tilting is provided in a part of (3), (2) when the engine (E) tilts from the oil pan (6) to the rotating body (8) side (that is, the rotating body side tilted state ( (P)), the oil that flows down toward the oil sump (10) below the rotating body (8) is received by the oil sump (10).

At this time, the lower end portion (11) of the rotating body (8) sinks below the oil level of the oil received by the oil sump (10) and scrapes up the oil level of the oil, so that the oil spun (4) scoops up oil. The insufficient amount can be compensated by the amount of scraped oil of the rotating body (8).

(3) When the engine (E) is in the upright state (Q) without tilting, the oil does not push in the direction of the oil sump (10), and therefore the oil is not collected or even if it is collected. Since the oil surface is located lower than the lower end (11) of the rotating body (8), the oil is scraped up only by the oil spun (4) and not the rotating body (8). Eliminate excessive circulation.

<Effect of the device> (1) Even if the oil in the oil pan tries to flow into the crank chamber when the engine suddenly tilts greatly,
Since it is blocked by the partition wall, a large amount of oil does not flow out into the crank chamber and is not discharged on the blow-by gas outside the crank chamber. Therefore, it is possible to prevent wasteful consumption of lubricating oil, and particularly when the present invention is applied to an engine mounted on a motorcycle that tends to steeply bend in a curve, the effect is particularly remarkable. it can.

(2) When the engine leans toward the rotor side when viewed from the oil spun, even if the amount of oil stored in the oil pan is small, the oil stored in the oil sump is scraped up by the rotor to prevent A sufficient amount of effective lubricating oil can be obtained because the insufficient amount of scraped oil can be compensated.

In addition, when the engine is upright, the oil is scraped up only by the oil spun and not by the rotating body, so that excessive lubrication of splashes can be eliminated. Therefore, also in this respect, wasteful consumption of oil can be prevented.

(3) Since the existing rotary body is used for lubrication during tilting only by forming an oil reservoir during tilting on a part of the partition wall provided on the lower side of the rotary body, the structure of the lubricating device can be simplified, The present invention can be implemented at low cost.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

1 is a vertical left side view of a horizontal overhead valve engine, and FIG. 2 is a vertical front view of the horizontal overhead valve engine. The horizontal engine E has a cylinder 13 in the left-right direction, and is vertically moved in a crank chamber 1. The valve cam shaft 14, the crank shaft 5, and the balancer shaft 12 are respectively supported in parallel in the front-rear direction, and the oil pan 6 is formed below the crank chamber 1 via the corrugation prevention wall 17.

Piston 15 that is slidably fitted inside the cylinder 13
Is connected to a crankshaft 5 via a connecting rod 2, and a bent sheet metal oil spun 4 is detachably attached to a large end portion 3 of the connecting rod 2 with a bolt 16 downward.

With the rotation of the crankshaft 5, the oil spun 4 is
The crankcase 1 is splash-lubricated by scraping up the oil stored in the oil pan 6.

A crank gear in which a balancer gear 8 and a balancer (not shown) are fixed to the balancer shaft 12 and fixed to the crank shaft 5.
The balancer gear 8 is engaged with the balancer gear 8 and the balancer gear 8 is moved from the rotation surface B of the oil spun 4 on the balancer shaft 12 (a plane in the left-right direction and a surface orthogonal to the crankshaft 5) to the shaft of the crankshaft 5. It is placed in a region that is biased to the rear side in the axial direction C.

On the other hand, a wave preventing partition wall 23 for partitioning the crank chamber 1 from the oil pan 6 is provided in the left and right direction of the crank case 20, and an opening 24 (oil splash) is provided in the partition wall 23 so as not to interfere with the rotation trajectory of the oil spun 4. (It also serves as a supply port to the crank chamber 1).

As shown in FIGS. 1 and 2, a part of the partition wall 23 is formed along a substantially arc shape so as to surround the lower portion of the balancer gear 8, and is configured to function as an oil reservoir 10 at the time of inclination. To be done.

However, the tilted oil sump 10 may be formed separately from the partition wall 23 as an arc-shaped eave-shaped receiver along the balancer gear 8. In this case, the receiving body may be integrated with the crankcase 20 or provided separately.

Further, the receiving body 10 may be provided in a recessed shape by forming the meat wall of the crankcase 20 in a recessed shape instead of forming the eaves shape.

The valve cam 7 formed on the valve cam shaft 14 is the third valve cam.
As shown in FIGS. A and B, the short-diameter portion, that is, the base circle portion 15 is cut out so that the width becomes narrower toward the tip end, and the center of gravity of the cam 7 is moved in the direction of arrow D.
A large offset is secured between the cam 7 and the tappet 21 to ensure the rotation of the tappet and prevent an increase in valve clearance due to uneven wear.

Therefore, the function of the present embodiment will be described. (1) When the engine E leans to the rear side where the balancer gear 8 is seen from the oil spun 4 (that is, the rotating body side leaning state P
The oil sump 10 below the balancer gear 8
Since the oil in the oil pan 6 is pushed toward, the oil is received by the oil sump 10.

At this time, the lower end portion 11 of the balancer gear 8 has the oil sump 10
Since it sinks below the oil level of the oil received and is scratched up, the oil level of the oil spun 4 can be supplemented by the oil level of the balancer gear 8.
Even in the inclined operation state, a large amount of effective lubricating oil can be obtained.

(2) When the engine E is in the upright state Q without tilting, the oil does not squeeze toward the oil sump 10 and there is no oil sump, so the oil is scraped up only by the oil spun 4 and the balancer gear 8 There is no scraping.

As a result, excessive lubrication of splashes is eliminated and consumption of the amount of lubricating oil is prevented.

In addition, the present invention, when the engine E is tilted, the oil sump 10
Since the rotating body 8 is configured to scrape up the oil received by the rotating body 8, the rotating body 8 is not limited to the balancer shaft balancer gear as in the above-described embodiment, but may be a balancer shaft balancer or a governor gear. Other rotating bodies may also be used.

Further, the present invention is not limited to the horizontal engine of the above-described embodiment in which the crankshaft is supported in the horizontal direction, as long as the cylinder is arranged in the horizontal direction, and the vertical shaft in which the crankshaft is supported in the vertical direction is used. It can also be applied to engines.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a left side view in vertical section of a horizontal overhead valve engine, Fig. 2 is a front view in vertical section of the engine, and Fig. 3A is a front view of main parts of a valve operating cam. 3B is a longitudinal sectional view of the valve operating cam, and FIG. 4 is a view corresponding to FIG. 1 showing a conventional technique. E ... Horizontal axis engine, 1 ... Crank chamber, 2 ... Connecting rod,
3 ... 2 large end, 4 ... oil spun, 5 ... crankshaft,
6 ... Oil pan, 8 ... Rotating body, 10 ... Oil sump when tilted,
11 ... 8 lower end, A ... oil upper limit specified oil surface, B ... 4 rotating surface, C ... 5 axial direction, P ... rotating body side inclined state, Q
... E upright.

Claims (1)

[Scope of utility model registration request] 1. An oil spun (4) is projected downward from a large end (3) of a connecting rod (2) in a crank chamber (1) of a horizontal shaft engine (E) to rotate a crankshaft (5). Along with this, the oil spun (4) is rotated to scrape up the oil in the oil pan (6) into the crank chamber (1), and the upper limit specified oil level (A) of the oil in the oil pan (6) is set. Above the table, the rotation surface (B) of the oil spun (4)
In the splash-type lubrication device for a horizontal axis engine, which is configured by disposing the rotating body (8) at a position deviated in the axial direction (C) of the crankshaft (5) from the crankshaft (5), A breakwater partition wall (23) for partitioning the chamber (1) from the oil pan (6) is provided in the left and right direction of the crankcase (20), and a part of the partition wall (23) is provided with an oil reservoir when tilted. (10) is provided, and the oil sump (10) at the time of tilting is such that when the engine (E) is tilted toward the rotor (8) side as viewed from the oil spun (4), it is in the tilted state (P) on the rotor side. While the surface is located higher than the lower end (11) of the rotating body (8), in the upright state (Q) of the engine (E), oil is not collected or even if it is collected, the oil surface Is shaped to be positioned lower than the lower end (11) of the rotating body (8) Splash type lubrication system on the horizontal axis the engine, wherein the door.