RU24245U1 - LUBRICATION ASSEMBLY IN THE DRIVE OF THE GAS DISTRIBUTION MECHANISM OF THE INTERNAL COMBUSTION ENGINE - Google Patents

Description

The lubrication unit in the gas distribution drive belongs to the field of mechanical engineering, in particular to internal combustion engines.

Engine lubrication systems are known. In the lubrication systems of modern engines, high-performance oils with additives ensure long-term operation of the engines. In such systems, a forced supply of oil under pressure to the friction surfaces of the vast majority of nodes of the crank timing mechanism is provided. Almost all plain bearings (main and connecting rod of crankshaft and camshaft, rocker arms, oil pump drives, gears and supercharger drive shafts, etc., are lubricated under pressure). 1

The closest in technical essence is the rocker arm assembly, which is used in the drive of the gas distribution mechanism in the internal combustion engines of a Kamaz automobile. 2 The rocker arm is a cast-iron support with vertical holes, with two trunnions made at the same time, on which the rocker arms are mounted. The friction surfaces of the trunnion trunnion legs and the adjusting screw are lubricated with oil, which is fed through special vertical holes made on the trunnion itself, trunnions, and the rocker arm with an outlet through the adjusting screw to the spherical surfaces of the valve stem. The axial holes of the oil supply, which have an exit to the ends of the pins, are suppressed by two special

cup caps, which are pressed with an interference fit into precisely machined nests. The rocker arm assembly has free oil loss, i.e. oil flows in addition to rubbing surfaces. And when parts wear, oil loss increases, which in turn leads to rapid wear and failure of heavily loaded parts such as a crankshaft, camshaft, and other parts.

Internal combustion engines consist of the following main parts: cylinder block, crankshaft, camshaft, gas distribution mechanism, cylinder heads, liners, connecting rods, etc.

Such engines are used as forced lubrication, which is supplied under pressure to strongly rubbing surfaces (crankshaft, camshaft and gas distribution mechanism) and is carried out by spraying due to the rotation of parts (sleeve, piston, piston pin, gears, etc. And since forced lubrication of parts has one common system, the loss of oil in any node immediately affects the entire system and reduces the life of the engine.

The objective of the invention is to Reduce the loss of oil consumption in a forced lubrication system and consequently increase the life of the engine.

In fig. 1.2 a schematic diagram of the lubrication unit of the gas distribution mechanism of a Kamaz automobile is shown, where Fig. 1 shows the rocker arm section in sections along sections AA and BB. The alleged invention is illustrated

miiocBi Fig. 3.4. The timing gear lubrication unit consists of a rack

rocker arm (1) with vertical holes (10), made integral with trunnions (7), in which the lubricant supply hole (N) is located at an angle to the vertical hole in the rocker arm, a channel is made in the middle of the axle width along the horizontal axial on both sides ( C) at the same time, the rocker arms (2) are installed on the trunnions ..

The yoke (2) mounted on the pin has a zone K representing

a highly rubbing surface of approximately 120 and zone T is freer with respect to zone K due to the gap S, which is predetermined by the lower tolerance "(trunnions and struts of the beam and the upper tolerance 9 of the opening of the beam.

To clarify the invention we compare the prototype and the alleged invention. When the force P acts on the rocker arm (2), oil under pressure enters the vertical hole (U) of the strut, trunnion and the horizontal through hole (C) of the cross-section. A-A (Fig. 1), made in the trunnion (7) and partially in the rocker arm, and then simultaneously into the parallel holes (B, D) section. B-B (Fig. 1), which supplies oil to zone K on rubbing surfaces and through the hole (D) to the adjusting screw, rod and pusher.

Since there is a gap S, through which oil flows freely, the oil will flow not only into zone K, not only into hole (D), but also onto heavily loaded friction surfaces of the crankshaft and camshaft.

M (

3 in the existing model, oil losses are incorporated, and when the pair is worn

rocker arms and rocker arms - oil losses will increase due to an increase in clearance S, and therefore this will lead to a decrease in the life of the internal combustion engine. To eliminate these drawbacks in the proposed invention, the hole for supplying lubricant (N) is made at an angle to the vertical hole in the rocker arm, which is connected to the channel (C) made in the middle of the axle width along the horizontal axial axis on both sides.

Oil under pressure is fed into the vertical hole of the rack (U) through an inclined hole (N) to rubbing surfaces in zone K. Through the channel (C) passing through the diameter of zone K, oil enters into the gap S, and from the gap S into the hole (D) rocker arms and further on the adjusting screw, bar and pusher.

In the proposed invention, the oil supply is targeted, i.e. the oil is fed through an inclined hole in the pin to the channel and then into the cavity S and then by spraying on all other rubbing surfaces of the parts.

Thus, lubrication is more targeted.

1 Grigoriev M.A. Oil purification in internal combustion engines.- M .:

Engineering, 1983. 2 Yurkovsky I.M. and Tolpygin V.A. Car Kamaz. Device,

4

Claims (1)

Lubrication unit in the drive of the gas distribution mechanism of the internal combustion engine including a rocker arm with vertical holes and mounted rockers, made integral with two trunnions with holes for supplying lubricant, characterized in that a channel is made in the middle of the trunnion width along the horizontal axial axle on both sides, a lubrication hole located at an angle to the vertical hole in the beam.