KR19980022677A - Main bearing structure for automobile - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main bearing structure for automobiles, and more particularly, to an outer portion of the main bearing formed on the upper part of the main bearings provided on the main journal portion of the cylinder block. Of course, it is formed so as to communicate with the oil groove formed, and to form an oil groove to communicate with the oil main gallery, the oil supplied to the main journal portion through the oil groove formed in the main bearing itself It is transferred to the oil passage formed between the bed plate and the joining surface so that it can be supplied to the balance shafts installed on both sides.In real use, the contact surface between the oil and the main bearing is increased, which increases the cooling effect of the main bearing. It is also possible to make oil grooves in the main journal section of the block. By eliminating the public tablet, it is possible to shorten the manufacturing process to improve productivity, and consequently to improve the added value of the entire vehicle manufactured by using the technology of the present invention, thereby improving the merchandise and reliability of the entire vehicle. One invention to give.

Description

Main bearing structure for automobile

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main bearing structure for automobiles, and more particularly, to an outer portion of the main bearing formed on the upper part of the main bearings provided on the main journal portion of the cylinder block. Of course, it is formed so as to communicate with the oil groove formed, and to form an oil groove to communicate with the oil main gallery, the oil supplied to the main journal portion through the oil groove formed in the main bearing itself It is transferred to the oil passage formed between the bed plate and the joining surface so that it can be supplied to the balance shafts installed on both sides.In real use, the contact surface between the oil and the main bearing increases, which increases the cooling effect of the main bearing. It is also possible to make oil grooves in the main journal section of the block. By eliminating the public tablet, it is possible to shorten the manufacturing process to improve productivity, and consequently to improve the added value of the entire vehicle manufactured by using the technology of the present invention, thereby improving the merchandise and reliability of the entire vehicle. It relates to a main bearing structure for automobiles.

In general, an internal combustion engine burns fuel inside an engine and converts the thermal energy generated therein into kinetic energy to perform mechanical work. The engine compresses gas in a compression stroke and generates power by the explosive force of the gas in an explosion stroke. It is transmitted to the piston and is also transmitted to the connecting rod through the piston pin to rotate and drive the crankshaft.

These engines are generally divided into engine main bodies and engine accessories, where the engine main body is a power generating part such as a cylinder, a crankcase, a cylinder head, a piston, a piston ring, a piston pin, a connecting rod, It is roughly assembled from crankshafts, flywheels, engine bearings, camshafts, valves, and valve mechanisms. In these cylinder engines, many cylinders are generally listed as linear or V-shaped. One part is connected, and the other end of the connecting rod is mounted on the crankshaft so that the piston can rotate when the reciprocating motion.

In addition, there is a cylinder head on the upper part of the cylinder, which is a combustion chamber inside, and this part is provided with an intake valve and an exhaust valve. These valves are operated by a cam shaft, and the inlet and exhaust ports are opened and closed by a valve, and the mixer is sucked into the cylinder Combustion gases are emitted.

In detail, the crankshaft rotated in the reciprocating motion of the piston will be described in more detail as follows. The linear power of the piston obtained by the expansion stroke of each cylinder is converted into the rotational force through the connecting rod, and in the other stroke, the piston is reversed. The crankshaft is formed to support the crank journal and the crank pin part by means of any bearing installed in the cylinder to achieve assembly installation. It is generally referred to as MAIN BEARING, and the main bearing can be divided into a separate type and an integral type according to the shape of the structure, which is commonly referred to as the crank shaft formed integrally with the crank shaft as described above. Big The crankshaft can be assembled in the cylinder block to support the crankshaft portion, so that the crankshaft can be smoothly rotated, and the crankshaft or the connecting rod can be prevented in advance.

As such, the crank journal and the crank pin portion formed integrally with the crank shaft are supported to be assembled in the cylinder block so that the crank shaft can be smoothly rotated while the crank shaft is rotated, and the crank shaft and the connecting rod are worn out. The conventional main bearing structure for automobiles (MAIN BEARING) manufactured to be prevented in advance has been shown a typical example as shown in Figure 1, briefly described as follows.

As shown in the upper portion, a semicircular main journal portion 16a is formed at the lower center in the longitudinal direction, and semi-circular balanced shaft mounting holes 26a are formed at the lower both sides in the longitudinal direction, and at the upper predetermined portion. The cylinder block 12 in which the oil main gallery 18 is formed is formed.

In addition, the lower portion of the cylinder block 12 is opposed to the semi-circular main journal portion 16a formed at the lower portion of the cylinder block 12 and the balance shaft installation hole 26a formed at both sides. The bed plate 14 in which the semicircular main journal part 16b and the balance shaft installation hole 26b which are opposed to a position are formed is fixed, and the main journal part 16a formed in the longitudinal direction in the center is provided. The crankshaft 20 is provided in 16b, and the balance shaft 22 is provided in the balance shaft installation hole 26a, 26b formed in both longitudinal directions.

On the other hand, the cylinder block 12 is formed in communication with the oil main gallery 18 on the lower joining surface and the main journal portion (16a, 16b), as well as the balance shaft is formed on both sides Oil grooves 24 are formed to communicate with the balls 26a and 26b, and the main journal portions 16a and 16b have several main bearings 10a and 10b in the longitudinal direction. The installation consists of.

However, the conventional design constituted as described above allows the oil supplied from the oil main gallery 18 to be supplied to the balance shaft mounting holes 26a and 26b formed at both sides of the cylinder block 12 during actual use. Oil grooves 24 are formed on the lower joining surface and the main journal portions 16a and 16b so that the lower joining surface and the main journal portions 16a and 16b of the cylinder block 12 are manufactured. Of course, the problem of hindering the production efficiency by causing a delay in the work due to the machining difficulties in which the oil grooves 24 should be formed on the surface of the oil grooves 24, and the contact surface between the oil and the main bearings 10a, 10b As a result, the problem that the cooling effect of the main bearings 10a and 10b is somewhat reduced is caused.

Accordingly, the present invention has been made in view of the above-mentioned problems, so that the contact surface between the oil and the main bearing increases in actual use so that the cooling effect of the main bearing can be increased, and the oil groove in the main journal portion of the block. By eliminating the machining process to form the product, it is possible to shorten the manufacturing process so that the productivity can be improved, and as a result, the added value of the entire vehicle manufactured by using the technology of the present invention is improved, thereby improving the productability and reliability of the whole vehicle. The purpose is to provide a main bearing structure for automobiles to improve the back.

The object of the present invention is a main bearing for a vehicle (MAIN BEARING) structure, the lower joining surface of the cylinder block to the outer portion of the main bearing formed on the upper part of the main bearings provided on the main journal portion of the cylinder block It is formed to be in communication with the oil groove formed in, of course, can be achieved by configuring the oil groove to be in communication with the oil main gallery.

1 is a sectional view showing the main parts of an installation state of a main bearing for a conventional automobile (MAIN BEARING);

Figure 2 is a sectional view of the main part showing the installation state of the main bearing (MAIN BEARING) for automobiles of the present invention

Figure 3 is a perspective view showing the form of the main bearing (MAIN BEARING) for automobiles of the present invention

Explanation of symbols for main parts of the drawings

100a, 100b: main bearing 102: cylinder block

104: bed plate 106a, 106b: main journal portion

108: Oil Main Gallery 110: Crankshaft

112: balance shaft 114: oil groove

116a, 116b: Balance shaft installation hole

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3, a semicircular main journal portion 106a is formed at a lower center at a lower center thereof in the upper portion thereof, and semicircular balanced shaft mounting holes 116a are formed at both lower sides thereof in a longitudinal direction. And a cylinder block 102 in which an oil main gallery 108 is formed.

In addition, the lower portion of the cylinder block 102 is opposed to the semi-circular main journal portion 106a formed in the lower portion of the cylinder block 102 and the balance shaft installation hole 116a formed on both sides. The semi-circular main journal section 106b opposite to the position and the bed plate 104 on which the balance shaft mounting holes 116a are formed are fixed, and the main journal section 106a is formed in the longitudinal direction at the center thereof. , Crankshaft 110 is provided in 106b, and the balance shaft 112 is provided in the balance shaft installation holes 116a and 116b which are formed in both longitudinal directions.

On the other hand, the main bearing (100a) formed on the upper side of the main bearing (100a), (100b) provided on the main journal portion 106 of the cylinder block 102 is the lower joining surface of the cylinder block (102) Of course, the oil groove 114 is formed to communicate with the oil groove 114 is formed, the oil groove 114 is configured as an outer portion to communicate with the oil main gallery (108).

According to the present invention configured as described above, the cylinder block may be formed as an outer portion of the main bearing 100a formed on the upper side of the main bearings 100a and 100b provided on the main journal portion 106 of the cylinder block 102. Of course, the oil groove 114 is formed to communicate with the oil groove 114 formed as the lower bonding surface of the 102, and the oil groove 114 is configured to communicate with the oil main gallery 108, the main journal portion ( The oil supplied to 106a) and 106b is transferred to the oil passage formed between the bed plate 104 and the joint surface through the oil groove 114 formed in the upper main bearing 100a itself. In order to supply to the installed balance shafts 116a and 116b, the contact surface between the oil and the main bearings increases in actual use so that the cooling effect of the main bearings can be increased, and the main journal of the blockBy eliminating the machining process to form oil grooves on the part, it is possible to shorten the manufacturing process and to improve productivity.

Therefore, as described above, the present invention is formed so as to be in communication with the oil groove formed in the lower joining surface of the cylinder block to the outer portion of the main bearing formed on the upper part of the main bearings installed on the main journal portion of the cylinder block. Of course, the oil groove is configured as an outer portion to communicate with the oil main gallery, and the oil supplied to the main journal is formed between the bed plate and the joint surface through the oil groove formed in the main bearing itself. It is transferred to the oil passage so that it can be supplied to the balance shafts installed on both sides, and the contact surface between the oil and the main bearing increases in actual use, so that the cooling effect of the main bearing can be increased. Eliminates the machining process to form oil grooves in the main journal area In this way, the manufacturing process can be shortened to improve productivity, and as a result, the added value of the entire vehicle manufactured by using the technology of the present invention can be improved to improve the merchandise and reliability of the entire vehicle. It will have an effect.

Claims (1)

In the MAIN BEARING structure for automobiles, the main bearing 100a formed on the upper part of the main bearings 100a and 100b provided on the main journal portion 106 of the cylinder block 102. It is formed to communicate with the oil groove 114 formed in the lower bonding surface of the cylinder block 102 to the outer portion of the, as well as the oil groove 114 to communicate with the oil main gallery 108 is configured Main bearing structure for automobile (MAIN BEARING).