JPS6211290Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an internal combustion engine with a vertically installed crankshaft. This invention relates to an internal combustion engine in which a slider is provided with a vane for scooping up oil.

(Prior art) Even in 4-cycle internal combustion engines with vertically mounted crankshafts, which are often used in lawn mowers, etc., in order to maintain smooth operation, lubricating oil stored in the crankcase is guided to the sliding parts. Lubricate. Conventionally, as such an internal combustion engine, for example,
The one described in Publication No. 138432 is known.

This internal combustion engine has a tube-shaped oil scooping tool attached to a cam gear fixed to a camshaft extending parallel to a vertical crankshaft.

(Problem that this invention aims to solve) However, in such conventional internal combustion engines, the oil scooping tool is attached to the cam gear that meshes with the gear on the crankshaft, so the location of the oil scooping tool is on the crankshaft. There was a problem in that sufficient lubricating oil could not be supplied to parts located in corners of the crankcase, such as camshaft bearings.

On the other hand, in order to supply sufficient lubricating oil to the camshaft bearings in the corners of the crankcase, it is possible to install a separate member near the bearings to scoop up or scrape up the lubricating oil. A new problem arises in that the number of required parts, such as shafts that support the members, increases and the structure becomes more complex.

This idea was created in view of the above-mentioned problems, and its purpose is to provide an internal combustion engine that has a simple structure and can supply sufficient lubricating oil to the bearings located in the corners of the crankcase. There is.

(Means for solving the problem) This invention is a four-stroke internal combustion engine with a vertical crankshaft and a valve mechanism, in which a camshaft is provided so as to intersect with the shaft of the crankshaft, and the camshaft is driven by the crankshaft. In addition, a governor slider of the speed regulating mechanism is provided at one end of the camshaft so as to be partially impregnated with lubricating oil, and the governor slider is provided with a blade for scooping up the oil.

(Function) According to the internal combustion engine according to this invention, the governor slider, which has a relatively large degree of freedom in installation position and is attached near the wall of the crankcase, is provided with a vane for scooping up oil. Sufficient lubricating oil can be supplied to bearings, etc. Since this blade is installed on the existing governor slider, no other parts are required to attach the blade, and the structure does not become complicated.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

1 to 3 show an internal combustion engine according to an embodiment of this invention, in which FIG. 1 is a vertical side view, FIG. 2 is a sectional view of another part in the same direction, and FIG. It is a 3-3 arrow sectional view of.

The internal combustion engine 1 is obtained by integrally casting a cylinder head part 2, a cylinder block part 3, and a crankcase part 4. The opening 5 is formed from the base end of the cylinder block part 3 to the bottom part 4a outside the cylinder inner diameter part of the crankcase part 4, and is closed with a cover 6 made of steel plate or the like. A piston 7 is slidably fitted horizontally within the horizontal cylinder inner diameter portion 3a of the cylinder block 3, a spark plug 8 is obliquely mounted on the cylinder head 2, and an intake/exhaust passage is provided in the center. A valve 9 (only one of which is shown in the figure) is provided to open and close the combustion chamber and the combustion chamber. However, the other end of the rocker arm 10 engages with one end of a push rod 11 disposed in the cylinder axis direction. A support part 4b extending downward is provided at the outer part of the cylinder block part of the crankcase part 4, and a first bearing part 4c is provided at the upper part of the support part 4b and at the extension part of the inner diameter part of the cylinder. A second bearing part 4e is provided on the end wall 4d and is spaced apart from this in the axial direction, and a push rod housing part 12 is provided on the cylinder block part side between the bearing parts 4b and 4d so as to be parallel to the block part. One end of the passage 12a in the housing part 12 communicates with the support part 4a in the crankcase part, and the other end communicates with the head part 2.
It is open at the top. Piston 7 is connecting rod 13
The large end of the connecting rod 13 is connected to the pin part 14a of the cantilever crankshaft 14, and the cylinder head part 2, cylinder block part 3, and crankcase part 4 are integrally cast and the opening part 5 is connected to the small end part of the connecting rod 13. Because it is slanted, the cylinder inner diameter part 3a and bearing part 4
c, 4d can be easily machined. Web 14 adjacent to pin portion 14a of crankshaft 14
Web 14b of shaft portion 14c hanging down from b
The first journal portion 14d adjacent to the bearing portion 4
The second journal part 14e near the end of the shaft part 14c is supported by the bearing part 4d through a bearing 16, and the end of the shaft part 14c extends outside the bearing part 4d. The output portion 14f is sealed on the outside of the bearing 15 with an oil seal 17.

Bearing 1 of shaft portion 14c of crankshaft 14
A gear part 17 is formed on the outer periphery between 5 and 16, and the gear part 17 meshes with a gear part 19 of a camshaft 18 disposed perpendicularly to the shaft part 14c. The other end thereof is engaged with the cam portion 18a of the camshaft via the lifter 20. A governor slider 22 is fitted to one end 18b of the camshaft 18 on the side closer to the carburetor 21 disposed outside, so as to be able to freely slide in the axial direction while regulating the rotation direction, and the slider 22 is of a centrifugal expansion type. weight 2
3 is pivotally held, and the base of the weight 23 engages with the stopper 24 of the slider 22 provided at the end of the camshaft, and the slider 2
2 in the axial direction of the camshaft, the axial movement of this is transmitted to the bent transmission rod 25, and the transmission rod 2
5 has one end engaged with the slider 22, the other end protrudes outward from the crankcase portion, and is connected to one end of a connecting rod 26, the other end of the connecting rod 26 is connected to the throttle valve shaft 27 of the carburetor 21, Speed control is performed as known. The governor slider 22 has a disk-shaped portion 22a as shown in FIG.
A plurality of radial blades 28 are provided on one surface of the disk-shaped portion 22a, and the disk-shaped portion 22a is approximately half submerged in the oil 29 stored on the bottom of the crankcase portion as shown in FIG. Then, as the camshaft 18 rotates, the blades 28 scrape up the oil 29 for lubrication.

The other end 18c of the camshaft 18 described above is pivotally supported by a side cover 30 of the crankcase portion 4. An output shaft 31 is provided on the cover 30 so as to be perpendicular thereto, and the output shaft 31 and the camshaft end are connected to the gear 3.
2 and 33 are meshed and connected to obtain an output from the camshaft, and instead of the embodiment, an output portion may be used in which the end of the camshaft extends outside the cover.

In the above embodiments, a cantilevered crankshaft is shown, but a double-sided crankshaft type can also be used.

As is clear from the above, according to the present invention, the oil scraped up by the gear portion 19 of the camshaft 18 is transferred to the meshing portion between the gear portion 19 and the gear portion 17 of the crankshaft 14 and the sliding contact portion between the cam portion 18a and the lifter 20. etc. to the central part of the crankcase 4, and
A vane 28 provided on a governor slider 22 of the camshaft 18 scrapes up oil and supplies it to a sliding contact portion between the crankcase 4 and the camshaft 18 located at a corner of the crankcase 4. Therefore, sufficient oil can be supplied to all parts that require lubrication, and smooth operation can be maintained over a long period of time. Since the blade 28 is installed on the existing governor slider 22, this blade 28
8, that is, supplying oil to the corners of the crankcase 4, no special parts are required, and the structure does not become complicated.

(Effects of the invention) As explained above, according to the internal combustion engine according to this invention, the blades provided on the existing governor slider scrape up the oil and supply the oil to the sliding contact portion located at the corner of the crankcase. Therefore, sufficient oil can be supplied to all parts that require lubrication without complicating the structure.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional view of an internal combustion engine, FIG. 2 is a sectional view of other parts, and FIG. 3 is a sectional view taken along the line 3-3 in FIG. 1. be. In the drawing, 1 is an internal combustion engine, 14 is a crankshaft, 18 is a camshaft, 22 is a slider, 28
is a blade for scooping up oil.

Claims (1)

[Claims for Utility Model Registration] 4 with vertical crankshaft and valve mechanism
In a cycle internal combustion engine, a camshaft is provided so as to intersect with the shaft of the crankshaft, and the camshaft is driven by the crankshaft, and at one end of the camshaft, a governor slider of a speed regulating mechanism is partially impregnated in lubricating oil. 1. An internal combustion engine, characterized in that the governor slider is provided with a blade for scooping up oil.