KR200158314Y1 - One-body bearing cap for automotive oil pan - Google Patents

Abstract

The present invention relates to an integral bearing cap structure of an oil fan provided at a predetermined portion of a lower side of a cylinder block for a vehicle, and includes a cylinder block having an upper bearing cap formed so that half of an outer surface of a crank journal of a crankshaft is seated inside the lower side; The oil pan is formed to be coupled to the lower surface of the cylinder block, the lower bearing cap is integrally formed so that the other half of the outer surface of the crank journal is seated therein, and one of the pair of first and second sleeve linings The bearing is seated in the upper bearing cap of the cylinder block and the other one is configured to be seated in the lower bearing cap of the oil pan.

The present invention reduces the production cost according to the production of the vehicle by reducing the number of parts of the vehicle and at the same time improve the number of processes of assembly work according to the simple structure and the small number of parts and improve productivity, workability, etc. Fastening force and robustness due to the unification of parts are increased, and vibration and noise generated during crankshaft rotation are lowered, thereby increasing the merchandise and reliability of the product.

[Index]

Cylinder block, crankshaft, upper bearing cap, lower bearing cap, long bolt, oil pan, first slitting, second slitting, aluminum layer, steel layer.

Description

Integrated bearing cap structure of vehicle oil pan

The present invention relates to a structure in which a bearing cap provided at a lower setting portion of a vehicle cylinder block is integrally formed inside an oil pan, and particularly, a crank journal of a crankshaft provided to be rotated at a lower side of the cylinder block. The integrated bearing cap structure of an oil pan for a vehicle, which is wrapped by a plurality of lower bearing caps integrally formed in the oil pan and is provided to be smoothly supported, thereby contributing to the reduction of the number of parts and the reduction of assembly labor. will be.

In general, the crankshaft used in the engine of a car is supported by the main bearing installed in the crankcase, and the linear power of the piston obtained by the expansion stroke of each cylinder is changed by the connecting rod to change the rotational force through the connecting rod. This is the part that plays a major role in generating power.

The crankshaft is integrally composed of a crank pin, a crank arm, a crank arm, a crank journla, and the like, and a balancing weight on the crank arm to maintain rotational balance. ).

Here, the crank pin is a shaft portion for attaching the connecting rod by the partial name of the crankshaft, the crank journal is the main shaft portion supported by the bearing as the center of rotation of the crankshaft, the crank arm (crank web) is the crank pin and the crank journal Is the part that connects.

As described above, the shape of the crankshaft varies depending on the number of cylinders, the arrangement of the cylinders, the number of crank journals, the ignition order, and the like. The shape of the crankshaft currently used depends on the number of cylinders: 2 cylinder type, 3 cylinder type, 4 cylinder type, 6 There are cylinder type, 8 cylinder type, etc. Of these, 4 cylinder type is most commonly used.

The four cylinders are divided into two bearings, three bearings, and five bearings according to the number of crank journals. Among these, the five bearings have journals at both ends of the crank pin, so the bending moment is small, so that each part can be thinned. This type is the most commonly used today because of its low vibration and quiet operation and prolonging the life of the crankshaft.

The crankshaft is connected to the upper end of the connecting rod and the lower end by pivoting the crank pin so that the crankshaft is rotated by the reciprocating piston in the cylinder and the crank journal is rotated by the cylinder block and the bearing cap. It is mutually fixed and supported by long bolts for jerking.

The coupling structure of the conventional crankshaft as described above is briefly described with reference to FIG.

In Fig. 1, reference numeral 1 denotes a cylinder block, 2 denotes a crankshaft, 5 denotes a lower bearing cap, and 7 denotes an oil pan.

First, the vehicle cylinder block (1) is provided with a crankshaft (2) at the lower setting part, the upper bearing cap (4) formed in a semi-circular shape in the center formed integrally between each cylinder (3) It is.

The crankshaft (2) is a crank pin formed with a set interval to the shaft portion to which the connecting rod is connected, a crank journal formed by a main shaft portion supported by the bearing to the center of rotation of the shaft, the crank pin and the crank journal are interconnected It is formed with the crank arm which is a part to become.

Here, the crank arm is integrally formed on the opposite side of the crank pin, and the balancing weight is integrally formed to rotate while holding the weight balance to be maintained when the shaft rotates.

The lower bearing cap 5 has a semicircular groove formed at the center of the upper surface thereof and is positioned to correspond to the upper bearing cap 4 of the cylinder block 1 with the crank journal of the crankshaft interposed therebetween. The bolt insertion openings are formed at both ends so as to be firmly fastened and fixed by the long bolts 6 which are separate fastening elements.

In addition, the oil pan 7 is covered so that the crankshaft 2 which is supported to be pivotally supported by the upper bearing cap 4 and the lower bearing cap 5 formed on the lower side of the cylinder block 1 is covered with the cover. It is formed in a corresponding shape so as to be mounted on the lower surface of the cylinder block (1), a certain amount of engine oil is accommodated therein and the oil in the upper and lower bearing caps (4, 5) coupled to support the crankshaft (2) It is formed to be supplied.

Here, the protrusion 8 is formed at a predetermined interval on the outer lower surface of the oil pan 7 so as to prevent breakage when colliding with the ground.

However, such a conventional crankshaft coupling structure is such that the crankshaft 2 of the vehicle is supported by the upper bearing cap 4 and the lower bearing cap 5 which are formed at a set position inside the lower side of the cylinder block 1. Since it is configured to be fastened, the number of parts of the vehicle and the number of processes for assembling work are increased, and ultimately, the production cost of the vehicle is increased as well as productivity and workability are deteriorated.

Therefore, the present invention has been made to solve the fundamental problem of the prior art, the purpose of which is a plurality of lower bearing caps are integrally formed with a predetermined interval on the inner upper portion of the oil pan and the upper bearing cap of the cylinder block It is formed to be fastened and fastened to reduce the number of parts of the vehicle, ultimately reducing the production cost of the vehicle, and at the same time, reducing the number of processes for assembly work and improving the productivity and workability of the vehicle oil pan. To provide a bearing cap structure.

1 is an exploded perspective view showing a state in which a cylinder block and a bearing cap are respectively positioned with a crankshaft interposed therebetween.

Figure 2 is a schematic longitudinal cross-sectional view showing a bearing cap structure of an oil pan provided in the lower side of a conventional vehicle cylinder block.

Figure 3 is an exploded perspective view of the oil pan and the cylinder block are positioned with the bearing cap integrally formed between the crankshaft according to the present invention.

Figure 4 is a schematic longitudinal cross-sectional view showing a state in which the bearing cap is integrally formed in the oil pan of the present invention is fastened to the lower cylinder block.

* Explanation of symbols for main parts of the drawings

1: cylinder block 2: crankshaft

2a: Crank Journal 3: Cylinder

4: upper bearing cap 4a: upper groove portion

4b: Bolt insertion zone 5: Lower bearing cap

5a: Lower groove 5b: Bolt insertion hole

6: long bolt 7: oil pan

10: bearing body 11: first sleeve

12: second slip-lining 13: aluminum layer

14 steel layer 15 protruding jaw

In order to achieve the above object, the present invention has a semicircular upper groove portion is formed so that half of the outer surface of the crank journal of the crankshaft is seated at a predetermined position with a predetermined interval inside the lower side and the upper side is provided with bolt inserts on both sides The cylinder block is formed integrally with the bearing cap, and the upper surface is attached to the lower surface of the cylinder block is formed in a corresponding shape so as to correspond to the center so that the other half of the outer surface of the crank journal of the crankshaft with a predetermined interval therein An oil pan having a semicircular lower groove portion and bolt inserting holes formed at both ends thereof and having a plurality of lower bearing caps integrally formed to correspond to the lower surface of the upper bearing cap, and the crank journal of the crankshaft. Consisting shape to closely adhere to the outer surface Any one of the pair of first and second sleeves is mounted on the upper groove of the cylinder block and the other is composed of a bearing body formed to be seated in the lower groove of the oil pan of the vehicle oil pan It provides an integrated bearing cap structure.

In this case, the first and second sleeves of the bearing body are formed such that an aluminum layer is provided on the inner side and a steel layer is provided on the outer side.

In the present invention as described above it is possible to reduce the number of parts of the vehicle to reduce the production cost according to the vehicle manufacturing and at the same time to reduce the number of processes of the assembly work, productivity, workability and the like.

EXAMPLE

Hereinafter, a preferred embodiment of the present invention as described above with reference to the accompanying drawings in more detail as follows.

3 is an exploded perspective view of an oil pan and a cylinder block in which bearing caps are integrally formed with a crankshaft interposed therebetween according to a preferred embodiment of the present invention, and FIG. 4 is a bearing in the oil pan of the present invention. The schematic longitudinal cross-sectional view which shows the state in which the cap was integrally formed and fastened below the cylinder block is shown, respectively.

As can be seen from the above, the coupling assembly of the vehicle crankshaft of the present invention is a cylinder block (1) and the upper bearing cap (4) formed integrally between each cylinder (3) between the lower inner set portion and A crankshaft (2) having a crank pin (2a) connected to the connecting rod, a crank journal (2a) and a crank arm integrally connected to each other, and a lower part of the cylinder block (1) and a whole crankshaft (2); Consists of a corresponding shape so as to cover the cover is composed of an oil pan (7) formed to accommodate the engine oil therein.

The cylinder block (1) has a semicircular upper groove (4a) is formed so that half of the outer surface of the crank journal (2a) of the crankshaft (2) is wrapped in a predetermined position at a predetermined interval in the lower side and the bolts on both sides The upper bearing cap 4 with the insertion slot 4b is integrally formed.

In addition, the oil pan 7 is formed in a corresponding shape so that the upper surface is fixed to the lower surface of the cylinder block 1, and the other half of the outer surface of the crank journal 2a of the crank shaft 2 with a predetermined interval therein. A semicircular lower groove portion 5a corresponding to the center is formed to be seated, and bolt inserting holes 5b are formed at both ends, respectively, and a plurality of lower bearings are coupled to each other in correspondence with the lower surface of the upper bearing cap 4. The cap 5 is integrally formed.

Here, the lower side of the oil pan 7 is formed with a protruding jaw 15 for preventing damage due to contact with the road surface.

The bearing body 10 is formed in a corresponding shape so as to be in close contact with the outer surface of the crank journal 2a of the crankshaft 2, and a pair of first and second sleeves 11 and 12 divided evenly in half. One of the) is seated in the upper groove portion 4a of the cylinder block (1) and the other is formed to be seated in the lower groove portion (5a) of the oil pan (7).

Here, the first and second sleeves 11 and 12 of the bearing body 10 are formed such that the aluminum layer 13 is provided on the inner side and the steel layer 14 is provided on the outer side.

Integrated bearing cap structure of the vehicle oil fan of the present invention having the configuration as described above is described in more detail with reference to the accompanying drawings and assembled as follows.

First, the first sliding brush 11 is inserted into the upper groove portion 4a of the upper bearing cap 4 integrally formed between the cylinders 3 with a predetermined interval in the lower side of the vehicle cylinder block 1. Second slip-lining on the lower groove portion 5a of the lower bearing cap 5 integrally formed at each position corresponding to the upper bearing cap 4 inside the upper side of the oil pan 7. 12 is inserted and seated and fixed.

The upper crank journal 2a of the crankshaft 2 is positioned inside the lower side of the cylinder block 1 of the upper bearing cap 4 in which the first and second sleeves 11 and 12 are respectively set at the set positions. It is wrapped by the lower groove portion 5a of the lower bearing cap 5 integrally formed inside the upper groove portion 4a and the oil pan 7, and then bolt insertion holes 5b formed at both ends of the lower bearing cap 5. Fastening bolt 6 is inserted into the bolt insertion hole 4b of the upper bearing cap 4 so that the upper and lower surfaces of the upper and lower bearing caps 4 and 5 are tightly adhered to each other. It is fixed so that the crankshaft (2) is rotatably coupled.

In addition, the first and second sleeves 11 and 12 of the bearing body 10 are provided with an aluminum layer 13 on the inner side and a steel layer 14 on the outer side, respectively, thereby providing the crankshaft 2. The inner aluminum layer 13 of the first and second sleeves 11 and 12 in direct contact with the elasticity may be elastic to assist smooth lubrication.

As described above, the integrated bearing cap structure of the oil pan for a vehicle according to the present invention has an upper bearing cap 4 of the cylinder block 1 and a lower bearing cap 5 integrally formed in the oil pan 7 with a crank shaft ( Since the entire outer surface of the crank journal (2a) of the 2) is easily matched to each other to be wrapped together, it is possible to reduce the number of parts of the vehicle, thereby reducing the production cost of the vehicle manufacturing and at the same time assembling according to the simple structure and the small number of parts. It reduces the number of processes, improves productivity, workability, etc., minimizes interference between parts, and improves clamping force and robustness due to the unification of parts, which reduces vibration and noise generated when rotating the crankshaft (2). This shows an effect that can be increased.

Although the present invention has been shown and described in the specific preferred embodiments of the present invention, the present invention is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

Claims (2)

A cylinder block (1) having a plurality of upper bearing caps (4) formed therein so that half of an outer surface of the crank journal (2a) of the crankshaft (2) is enclosed within the lower side, and an upper portion of the lower surface of the cylinder block (1) Is formed so that the semi-circular lower groove portion 5a is formed at the center so that the other half of the outer surface of the crank journal 2a of the crank shaft 2 is seated at a predetermined interval therein, and the bolt insertion holes penetrated at both ends ( 5b) are respectively formed and the oil pan formed with a plurality of lower bearing caps 5 integrally coupled to each other to correspond to the lower surface of the upper bearing cap (4), a pair of first half divided into two equally One of the second sleeves 11 and 12 is seated in the upper bearing cap 4 of the cylinder block 1 and the other one is formed to be seated in the lower bearing cap 5 of the oil pan 7. It is characterized by consisting of a bearing body (10) An integral bearing cap structure for a vehicle oil pan. According to claim 1, wherein the first and second sleeves 11, 12 of the bearing body 10 is provided with an aluminum layer 13 on the inner side and a steel layer 14 on the outer side, respectively. An integrated bearing cap structure of an oil pan for a vehicle.