JPS587045Y2 - engine - Google Patents

Description

[Detailed description of the invention] This invention is an engine in which a cylindrical lubricating oil filter is fixed in the lower lubricating oil chamber in the crankcase, and the insertion port of this filter is also used as the lubricating oil drain port. Regarding the lubricating oil filter mounting structure.

Conventionally, as shown in FIG. 3, the lubricating oil drain/filter insertion port 1' was formed by the tip 20a of a drain vibe 20 projecting from the side wall of the crankcase 1'.

The reason why the vibrator 20 is provided in such a protruding manner is to ensure that the lubricating oil extracted from the drain flows out laterally outwardly beyond the wooden stand 19 that supports the engine and the engine mounting stand.

However, in this case, a first-order problem arose.

(a) An extra drain vibrator is required, and the manufacture and installation of the drain vibrator is time-consuming and expensive, and the installation of the drain vibrator may cause oil leakage from the base end.

(b) When installing the drain vibe, the bottom wall of the gear case, which is fixed to the side of the crankcase, and the top surface of the engine support stand are close to each other from above and below, making it narrow, so the drain vibe must be installed in this narrow gap. You can only use something thin enough to fit in, and the cylindrical filter that is inserted through this thin drain vibe is even thinner, has a small filtration capacity, is weak, and has a short lifespan.

(c) The bottom of the gear case must be raised high enough from the engine support base to accommodate the drain vibe, so the bottom of the gear case and crankshaft must be raised high enough to accommodate the drain vibe.

The crankcase and other parts are located high above the bottom wall of the crankcase, making the engine tall and large.

The center of gravity is high and vibrations are large.

In the present invention, at least a part of the bottom wall of the gear case is located low, close to the bottom wall of the crankcase.

A lubricating oil drain/filter insertion port is opened laterally outward at the bottom of the side wall of the gear case at the center position in the longitudinal direction of the crankcase, and the cylindrical filter is inserted from this insertion port through the lower part of the gear case and inserted into the lower part of the crankcase. Insert the cylindrical filter, position the strainer screen only inside the crankcase, and install a magnet at the end of the strainer screen on the insertion port side, and connect the lubricating oil drain and filter insertion port at the base end of the cylindrical filter. The above-mentioned problems are solved by sealing the filter tightly and by fitting and supporting the lubricating oil outlet of the cylindrical filter into the lubricating oil inlet formed on the other side wall of the crankcase.

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 shows a side view of the horizontal engine, and FIG. 2 shows a sectional view taken along line A--A in FIG.

In the figure, numeral 1 is the crankcase, and 2 is the fuel tank.

3 is a radiator, and 4 is a gear case.

The gear case 4 is fixed to the side surface of the crankcase 1,
The bottom wall 5 descends to a position close to the bottom wall 6 of the crankcase 1.

A lubricating oil drain/filter insertion lower is opened at the lower part of the side wall of the gear case 4 at the center position of the crankcase 1 in the longitudinal direction. It is inserted into the lubricating oil chamber 9 at the bottom.

The filter 8 is constructed by mounting a shape-retaining coil spring 12 and a straining net 13 between the threaded base end shaft portion 10 and the lubricating oil outlet port 11, with the shape-retaining coil spring 12 and straining net 13 inserted inside and outside. The shaft portion 10 is screwed to the drain/insertion lower part to prevent lubricant leakage, and the lubricant oil outlet cylindrical port 11 is connected to the crankcase 1.
The strainer net 13 is connected to the lubricating oil inlet 14 formed in another side wall of the holder while being fitted and supported, and the straining net 13 is located inside the crankcase 1 and not inside the gear case 4. 14 communicates with a suction hole of a trochoid pump 16 through an oil suction passage 15, and this pump 16 is driven by a camshaft 17.

18 is a magnet attached to the screwed base end shaft portion 10 side of the filter 8 in order to adsorb fine iron powder that has passed through the strainer net 13 and flowed into the strainer net 13, and 19 is a magnet that supports the engine. It is a wooden stand.

Since the present invention has the above-mentioned configuration, it has the first-order effect.

(a) The lubricating oil drain/filter insertion port is formed at the bottom of the side wall of the gear case, and the conventionally required drain vibrator can be omitted, which simplifies the structure and makes it cheaper to manufacture.

(0) The diameter of the cylindrical filter is not limited.

Since it can be used with fairly thick materials, it not only has great capacity, but is also durable and has a long lifespan.

(/→ Since the bottom wall of the gear case can be lowered to near the bottom wall of the crankcase, the gear case, crankshaft, and gear case can be lowered, making it possible to make the engine lower and more compact. Ue 1
The center of gravity is low.

Vibration can be reduced.

2) The filter mesh of the cylindrical filter is located only inside the crankcase and not inside the gear case, and the lubricating oil outlet of the filter is fitted and supported in the lubricating oil inlet formed on the other side wall of the crankcase. This prevents fine iron powder from being sucked in from the gear case.

Also. A magnet is attached to the end of the filter mesh on the insertion opening side, so even if fine iron powder may flow into the filter mesh, the magnet will attract the iron powder, preventing the iron powder from coming out. It cannot be sucked into the pump.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with the first figure being a side view and the second figure being a side view.
The figures are a cross-sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a cross-sectional view of a main part of a conventional product. 1... Crank case, 4... Gear case 7... Lubricating oil drain/filter insertion 0
．． 8... Cylindrical filter 11... Lubricating oil outlet, 14... Lubricating oil inlet.

Claims (1)

[Claims for Utility Model Registration] In an engine in which a gear case 4 is fixed to one side wall of the crankcase 1, at least a part of the bottom wall of the gear case 4 is located as low as near the bottom wall of the crankcase 1. A lubricating oil drain/filter insertion lower is opened laterally and outwardly at the bottom of the side wall of the gear case 4 at the center position in the longitudinal direction. The cylindrical filter 8 is inserted through the lower part of the gear case 4 into the lower part of the crankcase 1 from this insertion lower, and the straining net 13 of the cylindrical filter 8 is inserted into the inside of the crankcase 1 (
At the same time, a magnet 18 is installed at the end of the straining net 13 on the insertion lower side. At the base end 10 of the cylindrical soil letter 8, the lubricating oil drain/filter insertion lower is closed in an oil-tight manner. The lubricating oil filter installation structure for an engine is characterized in that the lubricating oil filter is fitted and supported in the lubricating oil inlet 14.