JPH0218253Y2 - - Google Patents

Description

[Detailed description of the invention] ≪Industrial application field≫ The present invention relates to a splash gear type lubrication device for vertical shaft engines, and is an improved device that specifically sprays lubricating oil onto the crank pin and into the cylinder. Regarding.

<<Prior Art>> This type of splash gear type lubrication device has conventionally been known, for example, as shown in FIG. 4.

That is, a cylinder (not shown) is protruded forward from the front of a crankcase 2 of a vertical shaft type engine, and a crank gear 7 is fixed to the lower side of a crank arm 5 of a crankshaft 4 within the crankcase 2, thereby preventing oil splashing. An oil splashing gear 18 having a lifting blade 19 on the upper surface is provided behind the crankshaft 4 with its support shaft 17 inclined backward, and the oil splashing gear 18 is directly engaged with the crank gear 7. It is composed of

<<Problems to be solved by the invention>> However, in the above-mentioned conventional example, since the splash gear 18 directly engages with the crank gear 7, the portion of the blade 19 that splashes the lubricating oil is the part of the counterweight 6. Due to the position within the rotational trajectory, the splashed lubricating oil collides with the lower surface 6a of the counterweight 6 rotating at high speed, is reflected in the direction of arrow A, and falls, causing sufficient lubricating oil to be applied to the crank pin and cylinder. The problem is that it cannot be supplied.

<<Means for Solving the Problems>> The present invention has been made to solve the above-mentioned problems. For example, as shown in FIG. The oil splashing gear 18 is positioned away from the crank gear 7 so as to splash oil onto the outside of the rotating surface 6b of the PTO shaft 11.
An intermediate transmission gear 15 is attached to the crank gear 7, and an oil splash gear 18 is attached to the crank gear 7.
It is characterized by being interlocked and connected via 5.

<<Operation>> The oil splashing gear 18 is disposed further rearward than the crank gear 7 with the intermediate transmission gear 15 interposed therebetween, and splashes lubricating oil diagonally forward and upward from the outside of the rotating surface 6b of the counterweight 6.

As a result, the lubricating oil is hit by the counterweight 6 and the side of the connecting rod big end, causing the crankcase 2
It scatters over the entire area inside the cylinder and is sufficiently supplied to the crank pin and cylinder.

≪Example≫ Figures 1 to 3 show examples of the present invention,
FIG. 1 is a cross-sectional view taken along the - line in FIG. 2, FIG. 2 is a cross-sectional plan view of a crankcase portion of a vertical shaft type engine, and FIG. 3 is a cross-sectional plan view of a cylinder portion of the engine.

A vertical shaft type engine 1 has a cylinder 3 projecting forward from the front part of a crankcase 2, and a crankshaft 4 attached to the crankcase 2, which has lubricating oil stored at the bottom.
and a camshaft 9 are supported vertically and interlocked with each other by a crank gear 7 and a cam gear 10, and a flywheel with a cooling fan (not shown) is attached to the upper end of the crankshaft 4. It is configured so that power can be extracted. Further, at the bottom of the crankcase 2, a PTO shaft 11 which is gear-coupled with a camshaft 9 is horizontally supported and protrudes from the outside of the crankcase 2.

The characteristic structure of the present invention will be explained below.

Crankshaft 4 provided at the bottom of crankcase 2
A boss portion 12 is formed on the side of the support boss 8,
The PTO shaft 11 is supported through the boss portion 12, and two bosses 13 and 16 are formed therein.

A shaft 14 is vertically driven into one boss 13 near the crankshaft 4, and an intermediate transmission gear 15 is interlocked with the crank gear 7 on the lower side of the crank arm 5.
is supported with play.

The support shaft 17 is attached to the other boss 16 that is far from the crankshaft 4.
An oil splashing gear 18 having an oil splashing blade 19 on the upper surface is loosely fitted and supported on this support shaft 17 so as to interlock with the intermediate transmission gear 15.

This oil splashing gear 18 is also used as a governor gear, and a pair of governor weights 20, 20 are installed on the upper part of this gear 18, and a governor sleeve 21 is fitted onto the protruding portion of the support shaft 17, and the governor The force generated by the centrifugal swinging of the weights 20, 20 causes the governor sleeve 21 and the arm 2 to
The governor shaft 23 is configured to swing through the governor shaft 23.

In the above embodiment, by interposing the intermediate transmission gear 15, the position of the flipping gear 18 is moved away from the crankshaft 4, and the flipping blade 19 of the gear 18 is moved to the outside of the rotating surface 6b of the counterweight 6. position, and also the gear 18
The direction of rotation (arrow C) is as shown in Figure 2, so that the lubricating oil is splashed up into the center by rotating it clockwise, thereby spraying the lubricating oil well onto the crank pin and into the cylinder. It is.

Further, by interposing the intermediate transmission gear 15, the gear ratio can be set appropriately, so the oil splash gear 18 can be rotated at high speed and the lubrication performance can be improved.

Although the above embodiment describes an oil splash gear that also serves as a governor gear, the present invention is not limited to this, and a dedicated oil splash gear may be used.

Moreover, although the description has been given of a device having oil splashing vanes 19, the lubricating oil may be splashed up by the teeth of the oil splashing gear 18.

<<Effect of the invention>> As explained above, according to the invention, the position of the oil splashing gear is moved away from the crank gear by intervening the intermediate transmission gear, and the lubricating oil is applied to the rotating surface of the lower surface of the lower counterweight. Because I made it pass through the outside and splash the oil upwards,
Enough oil can be supplied to the crank pin and cylinder.

In addition, by interposing an intermediate transmission gear,
Since the gear ratio can be set appropriately, the oil splash gear can be rotated at a desired high speed.

[Brief explanation of drawings]

1 to 3 show one embodiment of the present invention, and FIG. 1 is a sectional view taken along the - line in FIG.
The figure is a cross-sectional plan view of a crankcase portion of a vertical shaft type engine, FIG. 3 is a cross-sectional plan view of a cylinder portion of the engine, and FIG. 4 is a view equivalent to FIG. 1 showing a conventional example. 1... Vertical shaft type engine, 2... Crank case, 3
...Cylinder, 4...Crankshaft, 5...Crank arm, 6...Counterweight, 6a...Bottom surface of counterweight, 6b...Rotating surface, 7...Crank gear,
10... Cam gear, 11... PTO shaft, 12... PTO shaft support boss, 15... Intermediate transmission gear, 17... Support shaft,
18...Oil splash gear.

Claims (1)

[Claims for Utility Model Registration] 1. A cylinder 3 is protruded forward from the front part of a crankcase 2 of a vertical shaft type engine 1, a PTO shaft 11 is supported within the crankcase 2, and the crankshaft is supported within the crankcase 2. The crank gear 7 is fixed to the lower side of the crank arm 5 of No. 4, and the oil splash gear 18 is provided at a position behind the crankshaft 4 with its support shaft 17 tilting backward. 18 to crank gear 7
In a splash gear type lubrication system for a vertical shaft engine, the oil is splashed so as to splash oil onto the outside of the rotating surface 6b of the lower surface 6a of the counterweight 6, which is integrated with the lower crank arm 5. Gear 18
is located away from the crank gear 7, an intermediate transmission gear 15 is attached to the support boss 12 of the PTO shaft 11, and an oil splash gear 18 is interlocked and connected to the crank gear 7 via the intermediate transmission gear 15. Splash gear type lubrication system for vertical shaft type engines. 2. The splash gear type lubrication device for a vertical shaft engine as set forth in claim 1, wherein the oil splash gear 18 also serves as a governor gear.