JPS591323B2 - Distribution device for lubricating oil in internal combustion engines - Google Patents

Abstract

PURPOSE:To securely perform supply of lubricating oil into various working parts with tolerable stress by obtaining a distributor which is made to conduct gradually in conversion to various working parts with rotation of rotary axle, such as crankshaft, etc. through a delivery passage of a lubricating oil pump. CONSTITUTION:With rotation of a sliding ring 23 fixed on a crankshaft 5, if a leading edge 39' of groove 39 around its periphery passes through a supply port 27, and corresponds to a second distributing port 29, the supply port 27 conducts through the groove 39 to the distributing port 29, lubricating oil from the supply port 27 is spouted through a lubricating oil pipe 32 into a piston of a second air cylinder 3 which has just come down. Then, with further rotation of the sliding ring 23, a leading edge 40' of groove 40 passes through the supply port 27 and at the time point when it arrives at a first distributing port 28, said lubricating oil starts up spouting into a piston of a first air cylinder 2 likewise, subsequently ports 37, 38 corresponds to the port 27 when lubricating oil is supplied into the sliding part of crank pins 10, 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for distributing and supplying lubricating oil from a lubricating oil pump to various operating parts in an internal combustion engine.

In conventional internal combustion engines, the delivery passage from the lubricating oil pump is branched into multiple sections for each operating section to supply lubricating oil to the various operating sections. As the pressure drops at the relevant location, the oil supply pressure to various operating parts decreases, resulting in a lack of lubricant, and to increase the oil supply pressure, the lubricating oil pump must naturally be made larger. .

The present invention provides a distribution device in which the discharge passage of a lubricating oil pump is sequentially switched and communicated with various operating parts as a rotational shaft such as a crankshaft rotates, thereby supplying lubricating oil to the various operating parts. This allows the supply to be carried out accurately and reliably with considerable pressure.

Next, we will explain the drawings of an embodiment in which this example is applied to a two-cylinder engine. In the drawings, 1 is a cylinder block having a first cylinder 2 and a second cylinder 3, and 4 is a crankcase with a built-in crankshaft 5. , the crankshaft 5 is supported by ball or roller bearings 6, 1 at both ends thereof,
Further, a midway portion of the crankcase 4 is pivotally supported by two roller bearings 9, 9 with respect to a bearing portion 8 formed within the crankcase 4.

This crankshaft 5 is equipped with two crank pins 10, 11, and connecting rods 14 are connected to the pistons 12, 13 in each cylinder 2, 3.
．． The large end of No. 15 is rotatably fitted.

In addition, a case 16 attached to one side of the crankcase 4
A lubricating oil pump 19 to which power is transmitted from the crankshaft 5 through a pair of gears 17 and 18 is provided in the inner part.

The pump 19 sucks up lubricating oil from the inner bottom of the crankcase through a suction portion 20 and then supplies it from a discharge passage 21 to a distribution mechanism 22 provided between both roller bearings 9 in the intermediate bearing portion 8. It is composed of

This distribution mechanism 22 is a crankshaft 5 between both roller bearings 9, 9.
A sliding ring 23 is fitted onto the crankshaft 5 and fixed to the crankshaft 5 with a pin 24 so as to rotate together with the crankshaft 5, and a roller bearing 9
, 9 (consisting of a fixing ring 25 fixed non-rotatably with a fitting pin 26), and the sliding ring 23 slides and rotates with its outer circumferential surface in contact with the inner surface of the fixing ring 25. The fixing ring 25, which is inserted into the fixing ring 25, has a supply port 27 and two distribution ports 28.
．． 29 is bored in the normal direction, and the supply port 27 is connected to the discharge passage 21 of the lubricating oil pump 19 via a pipe joint 30.

On the other hand, both distribution ports 1-28 and 29 are provided so as to be shifted to both sides in the axial direction with respect to the supply port 27, and a lubricating oil pipe 3 whose upper end opens into the first cylinder 2 is provided at the first distribution port 28.
1, a second distribution port 291 is connected to a lubricating oil pipe 32 whose upper end opens into the second cylinder 3 via passages 33 and 34, respectively.A supply port 27 is provided on the inner surface of the fixing ring 25.
A supply groove 35 is cut to extend an appropriate length in the circumferential direction.

The sliding ring 23 is provided with ports 37 and 38 that coincide with both openings Q of an oil hole 36 that is perforated through the crankshaft 5 in a direction perpendicular to its axis. The supply port 27 in the fixing ring 25 is
A groove 40 is provided that extends to an appropriate length in the circumferential direction at a position corresponding to the first distribution port 28, and a groove extends to an appropriate length in the circumferential direction at a position that corresponds to the supply port 27 and the second distribution port 29. 39, and the crankshaft 5 has an oil hole 36 passing through it and a crank pin 10 on both sides.
, 11. An oil passage 41 for communicating with the sliding part on the outer periphery.
42 is drilled therein.

In this configuration ζ, as the sliding ring 23 fixed to the crankshaft 5 rotates, the starting end 39' of the groove 39 on the outer periphery
passes the supply port 27 and meets the second distribution port 29 (FIGS. 4 and 5), since the supply port 27 and the second distribution port 29 communicate through the groove 39, the supply port The lubricating oil supplied to 27 is injected into the piston of the second cylinder 3 that has just descended through the distribution port 29 and the lubricating oil pipe 31, and this ejection is caused by the supply groove 35 where the terminal end 3r of the groove 39 extends from the supply port 27. The process continues until reaching the terminal end 35'.

If the sliding ring 23 rotates further, the injection of lubricating oil to the second cylinder stops and the starting end of the groove 40' on the outer periphery passes the supply port 27 and reaches the first distribution port 28 (the sixth The lubricating oil supplied to the supply port 27 from the groove 4
0, it begins to be ejected into the piston of the first cylinder 2 that has just descended through the first distribution port 28 and the lubricating oil pipe 31,
This ejection is carried out over a section O up to the end 40 of the groove 40 and the supply port 27.

When the ports 37 and 38 formed therein coincide with the supply port 27 due to the rotation of the sliding ring 23, the lubricating oil enters the through oil hole 36 of the crankshaft 5, and from there, it passes through the oil passages 41 and 42 to both sides. The lubricating oil from the lubricating oil pump is supplied to the sliding parts of the large ends of the connecting rods at the crank pins 10 and 11, and the above action is repeated for each rotation of the crankshaft 5, and the lubricating oil from the lubricating oil pump is supplied to the solid cylinder, crank pin, etc. Pressure oil can be supplied to various operating parts in sequence.

In addition, in the above embodiment, the timing at which lubricating oil is spouted from both warm lubricating oil pipes 31 and 32 is determined by each piston 12.1.
If the bottom dead center ζ of 3 is set, both pistons 12
．． Since the lubricating oil can be injected into the inside of the piston 13, it is possible to lubricate not only the inside of the cylinder but also the piston pin at the same time, and the cooling effect on the piston can be promoted.

Furthermore, the fixed ring and the sliding ring may be provided on other rotating shafts such as camshafts that interlock with the crankshaft, and lubricating oil can be supplied under pressure to operating parts such as valve mechanisms. It goes without saying that the amount of oil to be supplied to the various operating parts, the amount of time that the oil is to be supplied, etc. can be arbitrarily set depending on the circumferential length, width, or depth of the groove on the outer periphery of the sliding ring.

In summary, the present invention provides a fixed ring that does not rotate, in which a sliding ring that rotates together with the rotating shaft of an engine is fitted onto the rotating shaft of the engine, and a discharge passage of a lubricating oil pump is connected to the fixed ring. A supply port and a plurality of distribution ports connected to various operating parts of the engine are bored, and the supply port and each distribution port are independently connected to each other on the outer peripheral surface of the sliding ring as the sliding ring rotates. This is a lubricating oil distribution device for an internal combustion engine that is provided with such grooves, and because the discharge passage from the lubricating oil pump is not branched for each operating part, it does not reduce the pressure drop as in the conventional method. Since this does not occur, lubricating oil can be supplied to various operating parts at high pressure without increasing the size of the lubricating oil pump, improving lubrication and cooling effects, and improving the timing of lubricating oil supply to various operating parts. Since the amount can be arbitrarily set according to the rotation of the crankshaft, lubricating oil can be accurately supplied at the most effective time, like the lubricating oil to the piston in the above embodiment.

When distributing lubricating oil through the rotation of the engine's rotating shaft, if there is no sliding ring fitted over the rotating shaft, a groove for communicating the supply port and distribution port on the fixed ring side should be placed around the outer circumference of the rotating shaft. Machining the rotary shaft is difficult because the grooves must be carved on the surface, and furthermore, carving the grooves on the rotary shaft reduces the strength of the rotary shaft.
The rotating shaft must have a large diameter.

In contrast, in the present invention, a sliding ring is fitted onto the rotating shaft as described above, and a groove is provided in the sliding ring for communicating the supply port and the distribution port on the fixed ring side. Therefore, there is no need to perform groove processing on the rotary shaft, and machining is easy, and the strength of the rotary shaft is not reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of the main parts of the engine, FIG. The figure is a cross-sectional view taken from IV-IV in Fig. 3, and Fig. 5 is a cross-sectional view taken from 7a is a view of the sliding ring in FIG. 3 viewed from below, and FIG. 7a is a view of the sliding ring in FIG. 3 viewed from above. 5...Crankshaft, 19...Lubricating oil pump, 21...Discharge passage, 25...Fixing ring, 23...Sliding Ring, 27...
... Supply port, 28, 29... Distribution port,
39, 40... groove.

Claims (1)

[Claims] 1. Insert a sliding ring that rotates with the rotating shaft while being fitted onto the rotating shaft of the engine into a fixed ring that does not rotate,
The fixed ring is provided with a supply port to which the discharge passage of the lubricating oil pump is connected, and a plurality of distribution ports connected to various operating parts of the engine, while the outer peripheral surface of the sliding ring is provided with a supply port connected to the discharge passage of the lubricating oil pump, and a plurality of distribution ports connected to various operating parts of the engine. A lubricating oil distribution device for an internal combustion engine, comprising grooves that communicate independently between a supply port and each distribution port.