KR19990019672U - Gear structure of oil pump - Google Patents

Abstract

The present invention relates to a gear structure used in an oil pump,

In the oil pump comprising the internal gear (5) and the external gear (10),

The external gear 10 is separated into two bodies 51 and 52 which are coupled to each other to form one body, and the oil flow path 53 having a predetermined size on one side of each of the bodies 51 and 52. Form 54 so that one waste flow path 55 is formed when each of the bodies 51 and 52 is coupled, and each body 51 at a predetermined position of the oil flow paths 53 and 54. 52 is formed to strongly bind the spring 56, characterized in that the oil inlet hole 57 of a predetermined size is formed on the outer surface of the body (51) (52) to the oil flow path at high speed driving of the engine Oil flows into the two bodies that make up the external gear, which reduces the contact area between the internal and external gears, preventing excessive oil from being supplied during high-speed operation of the engine, preventing overload of the oil pump and energy. The present invention relates to a gear structure of an oil pump to achieve an effect of reducing loss.

Description

Gear structure of oil pump

The present invention relates to a gear structure used in an oil pump, and in particular, the external gear that rotates in engagement with the internal gear is separated into two bodies, and an oil flow path and a spring are formed inside each body to drive the engine at high speed. The oil flows into the oil flow path so that the two bodies that make up the external gear are opened so that the contact area between the internal gear and the external gear is reduced, thereby preventing the excessive amount of oil from being supplied during high-speed operation of the engine, and The present invention relates to a gear structure of an oil pump that can achieve effects such as overload protection and energy loss reduction.

1 and 2 show a conventional oil pump,

An inner gear 3 that is installed between the cylinder block 1 and the front case 2 to rotate and an inner gear that is integrally fixed to the end of the crankshaft 4 and engaged with the outer gear 3 to transmit rotational force. It consists of the gear 5.

The operation of the conventional oil pump configured as described above,

As the engine is driven at a constant speed, the crankshaft 4 interlocks, the internal gear 5 rotates by the driving force of the crankshaft 4, and the external gear 3 rotates as the internal gear 5 rotates. Will rotate together.

As the internal gear 5 and the external gear 3 mesh with each other and rotate, the oil in the oil pan is sucked and discharged into the oil filter.

That is, the oil pump discharges oil to the oil filter in proportion to the engagement area between the internal gear 5 and the external gear 3.

However, in the conventional oil pump, since the dimensions of the internal gear and the external gear are constant, when the engine is driven at a high speed, a large amount of oil is supplied to the engine system regardless of the amount of oil required by the engine system and is unnecessary. There was a problem such as energy loss due to the oil supply and reduced life of the product due to the overload of the oil pump.

Accordingly, the present invention for solving the above problems consists of separating the external gear that rotates in engagement with the internal gear into two bodies, and forming an oil flow path and a spring inside each body to form an oil flow path at high speed of the engine. Oil flows into the two bodies that make up the external gear, which reduces the contact area between the internal and external gears, preventing excessive oil from being supplied during high-speed operation of the engine, preventing overload of the oil pump and energy. An object of the present invention is to provide a gear structure of an oil pump to achieve an effect of reducing loss.

1 is a side cross-sectional view showing a conventional gear structure.

2 is a cross-sectional view taken along the line A-A of FIG.

Figure 3 is a sectional view showing a gear structure of the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a cross-sectional view showing an operating state of the present invention.

※ Explanation of code for main part of drawing

4: crankshaft

5: Internal gear

10: External gear

51,52: Body

53,54: Oil flow path

55 waste gas

56: spring

The present invention for achieving the above object,

In an oil pump comprising an internal gear and an external gear,

The external gears are separated into two bodies that form a single body by being coupled to each other, and an oil flow path having a predetermined size is formed on one side of each body so that one waste flow path is formed when the respective bodies are combined. Forming a spring to strongly bind each body at a predetermined position of the oil flow path, characterized in that the oil inlet hole of a predetermined size is formed on the outer shell of the body.

Hereinafter, with reference to the accompanying drawings, Figures 3 to 5 will be described a preferred embodiment of the present invention.

3 to 5 show an embodiment of the present invention, FIG. 3 is a cross-sectional view showing a gear structure of the present invention, FIG. 4 is a cross-sectional view taken along line AA of FIG. 3, and FIG. 5 is an operating state of the present invention. It is a cross section shown.

According to the drawings, the present invention forms an internal gear 5 which is fixedly fixed to the end of the crankshaft 4 and rotates inside the front case 2, and an external gear on the outside of the internal gear 5. (10) was formed so that the external gear 10 is interlocked rotation when the internal gear (5) rotates.

In this case, the external gear 10 is separated into two bodies 51, 52 which are coupled to each other to form the external gear 10, and the oil flow of a predetermined size on one side of each of the bodies 51, 52. When the bodies 51 and 52 are combined to form the furnaces 53 and 54, the oil flow passages 53 and 54 form one waste passage 55.

In addition, at a predetermined position of the oil flow passages 53 and 54, a spring 56 is formed to strongly bind each of the bodies 51 and 52, so that the two bodies 51 and 52 are strongly coupled in need. When the external gear 10 rotates at a high speed by forming an oil inlet hole 57 of a predetermined size in the outer shell of the body 51, 52, the oil through the inlet hole 57 Inflow was made to fill the oil flow path (53) (54).

That is, when the external gear 10 rotates at a high speed so that a large amount of oil is introduced into the oil flow paths 53 and 54, the two bodies (by the pressure of the oil filled in the oil flow paths 53 and 54) 51 and 52 are opened to overcome the elasticity of the spring 56 to reduce the contact area between the internal gear 5 and the external gear 10.

Referring to the operation and effects of the present invention configured as described above are as follows.

When the engine is driven and the crankshaft 4 rotates, the internal gear 5 coupled with the crankshaft 4 rotates, and the external gear 10 meshed with the internal gear 5 also rotates.

In this state, when the engine rotates at high speed and the crankshaft 4 rotates at high speed, the internal gear 5 and the external gear 10 rotate at high speed as the crankshaft 4 rotates at high speed. .

When the external gear 10 rotates at a high speed, the oil in the front case 2 flows into the oil flow paths 53 and 54, that is, the waste flow path 55, through the inflow hole 57.

When the amount of oil flowing into the waste passage 55 gradually increases, the oil pressure becomes greater than the elastic force of the spring 56, so that the two bodies 51 and 52 in the state of being joined to each other are connected to the spring 56. ) To overcome the elasticity of the gap is a certain distance apart.

As the external gear 10 rotates at a high speed as shown in FIG. 5, when the two bodies 51 and 52 constituting the external gear 10 are separated by a predetermined distance, the internal gear 5 and the external gear The contact area of (10) is reduced to reduce the conveying pressure of the oil, thereby reducing the amount of oil supplied to the engine system.

That is, even when the engine is driven at a high speed, an excessive amount of oil is not supplied to the engine system.

On the other hand, when the engine is driven at a high speed and the rotation speed decreases as described above, the rotation speed of the crankshaft 4 is reduced, and consequently, the rotation speed of the external gear 10 is also reduced.

When the rotation speed of the external gear 10 decreases, as the centrifugal force of the oil decreases, the oil filled on the oil flow paths 53 and 54 flows out of the external gear 10 and the elastic force of the spring 56 is reduced. The two bodies 51 and 52 which were opened by 56 are to be engaged again.

That is, when the two bodies 51 and 52 are engaged again during the low speed driving of the engine, the oil required by the engine system is supplied to the engine system.

As described above, the present invention separates the external gear that rotates in engagement with the internal gear into two bodies, and forms an oil flow path and a spring inside each body, so that oil flows into the oil flow path at high speed of the engine. The two bodies constituting the external gear are opened to reduce the contact area between the internal gear and the external gear, preventing excessive oil from being supplied during high-speed driving of the engine, preventing overload of the oil pump and reducing the amount of energy loss. The gear structure of the oil pump to achieve the effect of.

Claims (1)

In the oil pump comprising the internal gear (5) and the external gear (10), The external gear 10 is separated into two bodies 51 and 52 which are coupled to each other to form one body, and the oil flow path 53 having a predetermined size on one side of each of the bodies 51 and 52. Form 54 so that one waste flow path 55 is formed when each of the bodies 51 and 52 is coupled, and each body 51 at a predetermined position of the oil flow paths 53 and 54. 52 is formed to strongly bind the spring 56, the gear structure of the oil pump, characterized in that the oil inlet hole 57 of a predetermined size is formed on the outer surface of the body (51) (52).