JPH0218252Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a splash-type lubrication device for a vertical shaft engine, which powerfully lubricates the cylinder and piston.

<Prior art> To describe the basic structure of a splash-type lubrication device for a vertical shaft engine, for example, as shown in FIG. A crank gear 4 is provided, and the oil splashing gear 5 meshed with the crank gear 4 is provided in an inclined shape such that its meshing portion 6 is higher than its opposite portion 7 and the meshing portion 6 falls toward the crankshaft 2 side. , the meshing portion 6 is located inside the rotating circumferential surface 14 of the crank arm 3, and an oil splashing blade 8 is provided on the upper surface of the oil splashing gear 5.

As shown in Japanese Utility Model Application No. 57-196207, the conventional splash type lubrication device has an oil splash gear 5 that is connected to the crankshaft in order to avoid interference with adjacent parts and to reduce the size of the vertical shaft engine. There was one in which an oil splashing blade 8 was provided close to the gear 4 in the direction of the rotating circumferential surface of the crank arm 3.

<Problems to be solved by the invention> In the conventional device described above, the oil splashes scraped up by the oil splashing blades 8 collide with the lower surface of the crank arm 3 rotating at high speed, bounce off, and travel downward, causing Since only a small amount of oil reaches the cylinder formed in the front part above the arm 3, there is a problem in that the cylinder part lacks lubrication and the engine seizes.

The technical object of the present invention is to provide a splash-type lubrication device that can powerfully lubricate a cylinder portion.

<Means for Solving the Problems> Means for achieving the above-mentioned problems will be explained below using FIGS. 1 to 3, which correspond to embodiments.

That is, the oil splashing blade 8 is connected to the oil splashing gear 5.
It stands up obliquely upward from the upper surface, and is configured to protrude outward from the rotating circumferential surface 14 of the crank arm 3 in a plan view and above the lower surface 15 of the crank arm 3 in an elevational view.

<Function> Among the oil splashing blades 8 raised diagonally upward from the top surface of the oil splashing gear 5 provided in an inclined manner, avoiding interference with the crank arm 3, rotation of the crank arm 3 is performed. The oil splashes that are scraped up by the part that is outside the circumferential surface 14 and that protrudes upward from the lower surface 15 of the arm rise beyond the lower crank arm 3 and hit the side surfaces of the crank arm 3 and the connecting rod that rotate at high speed. It is launched with enough force to bounce onto the cylinder located in front of the crankcase.

<Effects of the invention> The oil splashes raised by the oil splashing blades that stand up high are sprayed onto the cylinder from a position higher than the bottom surface of the crank arm, so the crank arm does not become an obstruction like in conventional equipment. , cylinder and piston lubrication can be strengthened, and engine seizure can be smoothly eliminated.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

Fig. 1 is a longitudinal sectional front view of the vertical shaft engine, Fig. 2 is a cross-sectional plan view of the same engine, Fig. 3 is a plan view of the governor gear, and Fig. 4 is an overall rear view of the vertical shaft engine, including the center of the vertical shaft engine E. A crankshaft 2 is vertically disposed above and below the section, and a cylinder 16 is disposed in front of the crankshaft 2, and a piston interlocked with the crankshaft 2 is fitted into the cylinder 16 so as to be slidable forward and backward.

In addition, a wind guide case 18 is installed above the vertical shaft engine E.
A ventilation fan 19 attached to the upper end of the crankshaft 2 is housed in the air guide case 18.

A fuel tank 20 is located in front of the air guide case 18.
A carburetor 21 is attached to the lower left side of the fuel tank 20, and a governor lever 22 pivotally supported on the outer right side of the crankcase 1 is interlocked with the throttle lever of the carburetor 21.

A crank gear 4 is provided on the lower side of the crank arm 3 formed in the middle of the crankshaft 2, and a cam gear 17 is provided on the valve drive camshaft 23 which is pivoted in parallel across the upper and lower right sides of the crankshaft 2. meshes with the crank gear 4 to operatively connect the valve drive camshaft 23 to the crankshaft 2.

In addition, the governor shaft 24 is set to be tilted backward as it goes upward with respect to the crankshaft 2, and a bevel-shaped governor gear (oil splashing gear) 5 is provided below the governor shaft 24, so that the crankshaft Engage with gear 4.

That is, the governor gear 5 is located below the crank arm 3, so to speak, and is inclined with the meshing portion 6 facing upward so as not to interfere with the rotating circumferential surface 14 of the crank arm 3.

A box-shaped weight case 25 is formed at the upper end of the governor shaft 24, and a governor weight 26 is swingably supported in the weight case 25.
The governor sleeve 27 fitted into the governor weight 26 is configured to be able to be driven forward and backward by the swinging end 26a of the governor weight 26.

The tip of the governor sleeve 27 is brought into contact with a tilting arm 28 that is pivotally supported within the crankcase 1, and the tilting arm 28, which rotates as the governor sleeve 27 moves forward and backward, is pivoted to the governor lever that is pivotally supported at its outer end. 22 to be swingable.

A pair of oil splashing blades 8 are provided on the upper surface of the governor gear 5 on the opposite side to the weight case 25, and the oil splashing blades 8 are provided on the upper surface of the governor gear 5 on the opposite side to the weight case 25. Form it in such a way as to avoid interference with 3.

The oil splashing blade 8 is configured to protrude outside the rotational circumferential surface 14 of the crank arm 3 in a plan view, and to protrude above the lower surface 15 of the crank arm 3 in an elevational view.

Therefore, as shown in FIGS. 1 and 3, the oil splashing blades 8 may be formed to have the same width vertically, or the oil splashing blades 8 may be simply raised diagonally upward from the upper surface of the governor gear 5. If the oil splashing blade 8 interferes with the crank arm 3, as shown in Fig. 5, cut out the center part in a substantially U-shape and cut out the upper and lower parts so as not to interfere with the crank arm 3. By projecting outward in the radial direction of the governor gear, the oil scooping function can be enhanced.

In the oil splashing type lubrication device constructed in this way, the oil splashes scraped up by the oil splashing blades 8 are located outside the rotational circumferential surface 14 of the crank arm 3 and in an area beyond the lower surface 15 of the crank arm 3. Since it is not blocked by the bottom surface of the crank arm 3 and bounced back, it is thrown out by the side surface of the arm and the side surface of the connecting rod, and hits the cylinder 1.
It is fully poured into 6.

As described above, since the present invention forms the oil splashing blades 8 at a predetermined height, the structure of the lubricating device can be changed by using the existing governor gear 5 as the oil splashing gear as in the above embodiment. You can make it simple, but
In addition to the governor gear, a separate oil splashing gear may be meshed with the crank gear 4 under the lower surface of the crank arm.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, in which the first is a vertical sectional front view of a vertical shaft engine, the second is a cross-sectional plan view of the engine, the third is a plan view of a governor gear, and the fourth is a FIG. 5 is an overall rear view of the vertical shaft engine, and FIG. 5 is a longitudinal sectional front view of the main parts around the governor gear, showing another embodiment. 1... Crank case, 2... Crankshaft, 3... Crank arm, 4... Crank gear, 5... Gear for oil splashing, 6... Meshing part of 4 and 5, 7... Opposite side of 6, 8... Oil splashing Blades, periphery of the upper surface of 10...5, intermediate portion of the upper surface of 12...5, rotating circumferential surface of 14...3, lower surface of 15...3.

Claims (1)

[Scope of Claim for Utility Model Registration] A crank gear 4 is provided below the crank arm 3 of the crankshaft 2 in the crank case 1 of the vertical shaft engine E, and an oil splashing gear 5 meshed with the crank gear 4 is meshed with the crank gear 4. The part 6 is higher than the opposite part 7, and the engaging part 6 is provided in an inclined manner so as to fall toward the crankshaft 2 side, and the engaging part 6 is located inside the rotational circumferential surface 14 of the crank arm 3. , An oil splashing blade 8 is installed on the top surface of the oil splashing gear 5.
In the splash-type lubrication device for a vertical shaft engine, the oil splash blade 8 is raised diagonally upward from the top surface of the oil splash gear 5, so that the rotating circumferential surface 14 of the crank arm 3 can be seen in a plan view. A splash-type lubrication device for a vertical shaft engine, characterized in that it is configured to be located on the outside and protrude above the lower surface of a crank arm 3 when viewed from above.