KR20020095886A - Lubrication apparatus for cam shaft - Google Patents

Abstract

PURPOSE: A device for lubricating camshaft is provided to improve the lubrication performance by spreading oil from the upper side of the camshaft. CONSTITUTION: Additional oil supply pipe(30) is supported by a head cover(20) at the right upper side of a cam(17) and a camshaft(18) to smoothly supply oil to the cam and the camshaft, wherein an inlet of the oil supply pipe is communicated with an output of an oil gallery to make oil pumped from the oil pump to be flowed into, a plurality of holes of a small diameter are formed at the lower part of the oil supply pipe with a prescribed intervals to make oil supplied to the oil supply pipe to be uniformly spread to the upper part of a cam mechanism.

Description

Lubrication apparatus for cam shaft

The present invention relates to a lubrication device of a cam mechanism, and more particularly, to a lubrication device of a cam mechanism in which a separate oil supply pipe is formed below the head cover for lubrication of the cam shaft and the cam mounted on the upper portion of the cylinder head. It is about.

The engine body of an automobile is a power generating part and is composed of a cylinder, a crankcase, a cylinder head, a piston, a piston ring, a connecting rod, a crankshaft, a flywheel, an engine bearing, a camshaft, a valve, and a valve mechanism. Inside each cylinder there is a piston and one part of the connecting rod is connected. The other end of the connecting rod is mounted on the crankshaft, and when the piston reciprocates, the crankshaft rotates.

The cylinder head is located above the cylinder, and the inside is a combustion chamber, and an intake valve and an exhaust valve are installed in this part. These valves are actuated by camshafts, which open and close the intake and exhaust ports by the valves and allow the mixer to be sucked into the cylinder or the combustion gases to be discharged.

The lubrication of the engine serves to cool the inside of the engine while reducing frictional resistance inside the engine, and engine oil is injected into the engine for this lubrication.

Lubrication inside the engine lubricates everything from the valve mechanism to the cylinder, as well as the main moving parts. The lubrication of the crankshaft bearings and connecting rod bearings, as well as the frictional resistance of lubrication to the crankshaft, connecting rods and pistons of the main moving parts, are made by the pressure pump of the oil pump. The lubrication of the piston and the cylinder wall is caused by the scattering of the engine oil by the rotation of the crankshaft. Lubrication of the cam device, rocker arm, and intake and exhaust valve of the valve device reduces the sliding resistance of this part, helps heat dissipation of the exhaust valve, and cools it. Engine oil is also being pumped to the camshaft bearings and rocker arms, and the intake and exhaust units are lubricated from the rocker arms.

4 is a view for explaining a process in which the cam mechanism of the engine is lubricated. In the cylinder block 11 and the cylinder head 12 of the engine 10, a water jacket 13 for cooling the combustion chamber is formed, and oil pumped from the oil pump to one side of the water jacket 13 includes a head cover ( An oil gallery 14 is formed to be directed to the 15) side. An oil hole 16 is formed around the lower side of the head cover 15, and the oil hole 16 is connected to the oil gallery 14. Therefore, when the engine is started, oil pumped from the oil pump is sprayed around the cam 17 and the cam shaft 18 through the oil gallery 14 and the oil hole 16 to lubricate the cam mechanism.

However, the oil hole formed around the lower side of the head cover for lubricating the conventional cam mechanism is formed during the casting of the head cover, and thus the diameter of the oil hole is not adjustable, and foreign substances are caught in the relatively small oil holes, thereby narrowing or In the case where the viscosity of the oil is changed due to long running of the engine, there is a high possibility that a problem occurs in the lubrication of the cam mechanism. Therefore, a more effective lubrication method for the cam mechanism is needed.

Therefore, the present invention has been made to solve the above problems, more specifically, a cam mechanism in which a separate oil supply pipe is formed on the lower side of the head cover for lubrication of the cam shaft and the cam mounted on the upper portion of the cylinder head. The purpose is to provide a lubrication device.

The present invention as a means for achieving the above object,

In that a cam mechanism such as a cam and a cam shaft is mounted on the upper portion of the cylinder head,

In order to smoothly supply oil to the cam and the cam shaft, a separate oil supply pipe is supported on the head cover immediately above the cam and cam shaft, and the inlet of the oil supply pipe is pumped from the oil pump. Small diameter holes are provided in the lower side of the oil supply pipe at predetermined intervals so as to be in communication with the outlet of the oil gallery so that the oil can be introduced therein, so that the oil supplied to the oil supply pipe is evenly sprayed onto the upper part of the cam mechanism. It is characterized in that a large number is formed.

1 is a cross-sectional view of an engine according to the present invention.

2 is a view for explaining the oil supply pipe formed by the present invention.

Figure 3 is a bottom perspective view of the head cover formed by the present invention.

4 is a diagram for explaining a conventional technology.

※ Explanation of code for main part of drawing

10 engine 11 cylinder block

12: cylinder head 14: oil gallery

17: Cam 18: Cam Shaft

20: head cover 30: oil supply pipe

31: hole 32: entrance

34: Clamp

Hereinafter, the embodiment according to the present invention will be described in detail with the accompanying drawings.

1 is a cross-sectional view of the engine according to the present invention, Figure 2 is a view for explaining the oil supply pipe formed by the present invention, Figure 3 is a bottom perspective view of the head cover formed by the present invention. Reference numeral 20 shown in the drawings indicates a head cover formed by the present invention, reference numeral 30 indicates an oil supply pipe formed by the present invention, and some reference numerals are used in the description of the prior art. Quoted symbols are quoted as such.

In the present invention, the general components of the engine 10 components are formed as in the prior art. That is, the cylinder block 11 and the cylinder head 12 are formed with a water jacket 13 through which coolant passes and an oil gallery 14 through which oil passes. In addition, the cylinder head 12 is formed with a cam 17 and a cam shaft 18 for operating the intake and exhaust valves 19.

And the head cover 20 is covered on the upper surface of the cylinder head 12, the head cover 20 may be formed without a conventional oil hole. That is, the oil supply pipe 30 serves as a conventional oil hole.

The oil supply pipe 30 is installed inside the head cover 20 by a clamp 34, the shape of which is bent in a "c" shape along the position shape of the cam shaft 18. Formed. In addition, a plurality of small holes 31 are formed at the lower side of the oil supply pipe 30 so that oil is supplied to a portion where the cam 17 and the cam shaft 18 are located. In particular, the inlet 32 of the oil supply pipe 30 is positioned so that it can communicate with the outlet of the oil gallery 14 formed in the cylinder head 12.

For reference, the shape in which the oil supply pipe 30 is bent is determined according to the mounting state of the cam shaft 18 of the engine, and thus may be implemented in various forms.

Referring to the operation and operation of the oil supply pipe mounted on the top of the cam shaft as described above are as follows.

When the engine is started, oil is pumped by the oil pump to lubricate or cool parts of the engine. A part of the oil pumped in this process is supplied to the oil supply pipe 30 formed above the cylinder head 12 along the oil gallery 14 described above.

The oil supplied to the oil supply pipe 30 is circulated along the bent shape and discharged by a predetermined amount into the holes 31 formed at predetermined intervals. The oil discharged through the hole 31 is sprayed on the cam 17, the cam shaft 18, the cam cap, and the like to lubricate the parts.

Since oil is sprayed directly on the upper side of the cam mechanisms, the lubrication performance of the oil becomes more effective than the conventional one, and the size of the flow path through which the oil passes can be adjusted to actively cope with the lubrication problem of the cam mechanisms. It becomes possible.

In particular, the oil supply pipe 30 is more effective when used in an engine to which a VVT (Variable Valve Timing) device is applied.

As described above, the present invention not only improves lubrication performance by being oiled for lubrication right above the cam shaft, but also reduces adsorption of oil holes through which oil passes, and can actively cope with lubrication problems of the cam mechanism. There is an advantage to that.

Claims (1)

In that a cam mechanism such as a cam and a cam shaft is mounted on the upper portion of the cylinder head, In order to smoothly supply oil to the cam 17 and the cam shaft 18, a separate oil supply pipe 30 is directly above the cam 17 and the cam shaft 18 to cover the head cover 20. It is supported by the), the inlet 32 of the oil supply pipe 30 is in communication with the outlet of the oil gallery 14 so that the pumped oil from the oil pump flows into, and is supplied to the oil supply pipe 30 Lubrication apparatus of the cam mechanism, characterized in that a plurality of small holes 31 are formed at predetermined intervals in the lower side of the oil supply pipe (30) so that the oil is evenly sprayed to the upper portion of the cam mechanism.