KR101063226B1 - Drain chamber structure of automotive water pump - Google Patents

Abstract

The present invention relates to a drain chamber structure of an automotive water pump, which is formed in an inclined structure extending laterally to the outer surface of the flange portion below the shaft insertion portion of the pump housing, and particularly, the opening portion is positioned at the top of the chamber space. The present invention relates to a drain chamber structure of an automotive water pump, which does not require a conventional sealing cap, facilitates securing a required chamber space, and does not require a separate vent hole because the opening portion replaces a conventional vent hole.

According to the drain chamber structure of the present invention, there is no restriction on the shape due to the non-use of the sealing cap, so that the shape of the drain chamber can be manufactured freely in addition to the existing circular shape, and the chamber shape is formed in a box-shaped closed structure. It may be advantageous in terms of rigidity, and there is an advantage of lowering the manufacturing cost by not using the sealing cap and removing the sealing cap indentation.

Automotive, water pump, pump housing, drain chamber

Description

Drain chamber structure of water pump for automobile

1 is a cross-sectional view of a pump housing showing a conventional drain chamber,

2 is a front view showing a conventional drain chamber,

3 is a schematic diagram of a mold structure for forming a pump housing integral with a conventional drain chamber;

4 is a front view of a pump housing to which a drain chamber structure according to the present invention is applied;

5 is a perspective view of a pump housing to which a drain chamber structure according to the present invention is applied;

6 is a schematic view of a mold structure used for molding the pump housing shown in FIGS. 4 and 5;

Figure 7a and 7b is a front view showing each embodiment of the drain chamber structure and the coolant storage height in accordance with the present invention.

<Explanation of symbols for the main parts of the drawings>

10 pump housing 11 shaft insert

12 flange portion 13 drain hole

14 drain chamber 14a opening

16: sealing cap 31: upper mold

32: lower mold 33: sliding core mold

The present invention relates to a drain chamber structure of an automotive water pump, and more particularly, is formed in an inclined structure extending laterally to the outer surface of the flange portion below the shaft insertion portion of the pump housing, in particular the upper end of the chamber space Since the opening is positioned so that the conventional sealing cap is not necessary, it is easy to secure necessary chamber space, and the drain chamber structure of the automotive water pump does not need a separate vent hole because the opening portion replaces the conventional vent hole. It is about.

In general, a water pump for an automobile is installed at a center of one side of a cylinder block and is driven by a rotational force of an engine transmitted through a belt to operate to circulate coolant smoothly into the engine.

In such a water pump, when the pulley receives the rotational force of the belt, the rotating shaft integrally coupled to the pulley is rotated to rotate the impeller to pump the coolant.

In the water pump, the flange portion of the pump housing is coupled to the cylinder block with a bolt, and a pump pulley is mounted on the outside of the pump housing by rotating a belt. The pump pulley is fixedly overlapped with the pump housing to rotate integrally with the pump pulley. The axis of rotation is inserted.

The end of the rotating shaft is installed in the cooling water circulation passage inside the cylinder block in the state that the impeller is coupled, and when the pump pulley and the rotating shaft rotates by the rotational force of the engine transmitted through the belt, the impeller of the cooling water circulation passage is rotated to pump the cooling water. Done.

In addition, a bearing is interposed between the rotary shaft and the inner surface of the pump housing.

In addition, the water pump has a mechanical seal installed between the pump housing and the cylinder block to prevent the bearing from malfunctioning or leaking to the outside of the pump because the rotating part directly contacts the coolant. .

In addition, one side of the pump housing is formed with a drain hole for discharging the coolant leaks around the mechanical seal, the coolant discharged through the drain hole is stored in the drain chamber formed separately in the pump housing and then the vent hole of the drain chamber Through the outside.

1 is a cross-sectional view of a pump housing showing a conventional drain chamber, and FIG. 2 is a front view showing a conventional drain chamber.

As shown in the figure, the rotation shaft 23 is inserted into the shaft insertion portion 11 of the pump housing 10 with the bearing 21 and the seal 22 interposed therebetween, and the rotation shaft 23 is integrally formed. The rotation of the coupled pump pulley (not shown) is transmitted to rotate the impeller (not shown) installed on the opposite end.

In addition, a drain chamber 14 is formed on the outer surface of the flange portion 12 below the shaft insertion portion 11 of the pump housing 10, and the drain chamber 14 has a predetermined coolant at the front of the flange portion 12. It will form a storage space (about 20cc).

In addition, a mechanical seal 24 is installed around the rotating shaft 23 on the side where the impeller is installed to prevent the coolant from flowing into the inner space of the shaft insertion portion 11 of the pump housing 10. The drain hole 13 penetrates through one side wall of the drain chamber 14 so as to be connected to the inner space of the drain chamber 14. The coolant penetrates into the inner space of the shaft insertion part 11 after passing through the mechanical seal 24. Or water vapor) is discharged to the drain chamber 14 through the drain hole 13.

Vent holes 15 connected to the outside are formed in the upper portion of the drain chamber 14, and when the amount of the cooling water exceeds the volume of the drain chamber 14, the cooling water overflows and is discharged through the vent hole 15. In addition, water vapor evaporated in the drain chamber 14 is also discharged through the vent hole 15.

In addition, since the drain chamber 14 extends horizontally from the lower side of the shaft insertion part 11, a sealing cap 16 is provided at an opening of the drain chamber 14 so that the coolant does not flow out of the horizontal coolant storage space. Press in and install.

In this way, the cooling water discharged through the drain hole 13 after passing through the mechanical seal 24 is accumulated in the drain chamber 14 and then evaporated in the chamber to be discharged to the outside through the vent hole 15.

On the other hand, the pump housing 10 of the shape as described above is formed using a die casting method, Figure 3 shows a mold structure for forming the pump housing of the drain chamber integral.

As shown, the pump housing 10 is molded by using a mold apparatus having an upper mold 31 and a lower mold 32. After the upper mold 31 and the lower mold 32 are combined, the molten material is transferred into the mold. High pressure injection is performed to mold the pump housing 10.

The upper mold 31 and the lower mold 32 are formed with molding portions 31a and 31b for molding the shape of the shaft inserting portion 11 of the pump housing 10, and in particular, forming the shaft inserting portion of the upper mold 31. Below the part 31, the chamber shaping | molding part 31b for shaping the shape of the drain chamber 14 is formed.

In order to open the mold after the high-pressure injection in the state in which the chamber forming part 31b is formed in the upper mold 31 and the two molds 31 and 32 are combined, the direction in which the upper mold moves in the chamber molding part 31b is moved. Since the drain chamber 14 has to be elongated in the same direction as the upper shaft insert 11, the drain chamber 14 is opened in the upper mold 31 direction.

Therefore, in the state where the water pump is mounted, the drain chamber 14 is placed in the horizontal direction, so that the coolant accumulated therein can only be poured through the opening, and thus only the molded drain chamber structure can store the coolant and secure the storage space. In order to prevent the opening by using the sealing cap (16).

As a result, in the conventional drain chamber structure, a cost increase is inevitable because the opening portion must be closed by using a sealing cap, and a circular structure is inevitable for use of the sealing cap, and it is difficult to secure an appropriate space inside due to layout constraints due to the circular shape. There is.

Therefore, the present invention has been invented to solve the above problems, and is formed in an inclined structure extending laterally to the outer surface of the flange portion below the shaft insertion portion of the pump housing, in particular open to the top of the chamber space It is configured to be an additional position, there is no need for a conventional sealing cap, it is easy to secure the necessary chamber space, and since the open portion replaces a conventional vent hole provides a drain chamber structure of an automotive water pump that does not require a separate vent hole Its purpose is to.

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

The present invention is formed so as to have an inner space on the outer surface of the flange portion under the shaft insert portion of the pump housing in the automotive water pump, and formed through the shaft insert wall to connect the inner space and the shaft insert portion inner space In the drain chamber structure of the automotive water pump having a drain hole to be discharged after the cooling water discharged to the drain hole is accumulated,

It is formed to extend in the lateral side on the outer side of the flange portion to the lower side of the shaft insertion portion, it is formed to be inclined upward from the lower side of the outer surface of the flange portion, characterized in that the upper end of the inner space is open.

As a preferred embodiment, the flange portion is formed to extend upwardly inclined to one side from the lower side of the outer surface is characterized in that the opening is located at the upper end of the inner space.

In another preferred embodiment, the flange portion is formed upwardly inclined to both sides from the outer side of the flange portion, the open portion is located at the upper end of the inner space in each direction, the lower end of both inner spaces are connected to each other to form a 'V' structure It is characterized by.

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

4 is a front view of the pump housing to which the drain chamber structure according to the present invention is applied, and FIG. 5 is a perspective view of the pump housing to which the drain chamber structure according to the present invention is applied.

6 is a schematic view of a mold structure used for molding the pump housing shown in FIGS. 4 and 5, and FIGS. 7A and 7B are front views showing respective embodiments of the drain chamber structure and the coolant storage height according to the present invention. to be.

As shown, the drain chamber 14 according to the present invention is integrally formed on the outer surface of the flange portion 12 below the shaft insertion portion 11 of the pump housing 10, the same as the shaft insertion portion as in the prior art Rather than being formed to extend in the horizontal direction from the flange portion outer surface horizontally, it is formed to be inclined in the lateral direction to the outer surface of the flange portion 12 below the shaft insertion portion 11, the opening portion 14a is directed upward It is improved to the facing structure.

Here, the drain hole 13 is formed to penetrate the lower wall of the shaft insertion portion 11, and connects the internal space of the shaft insertion portion 11 and the internal space of the drain chamber 14, and passes through the mechanical seal. Cooling water flowing into the rear axle insert 11 is discharged downward through the drain hole 13 and accumulated in the drain chamber 14.

Since the drain chamber 14 of the present invention has an inclined structure extending upwardly from the lower side of the shaft insertion portion 11 to the side as shown in FIG. 7A, the opening portion 14a is positioned at the top of the chamber space. Even if the coolant is accumulated to some extent, the liquid may not be poured through the opening 14a at the upper end unless it is above a certain level.

Therefore, there is no need to separately install the sealing cap on the opening portion 14a, and when the cooling water accumulated inside the chamber overflows with the opening portion 14 at the top open at all times, the vent flows to the outside or discharges the vaporized vapor. As it can be used as a hole, there is no need to form a separate vent hole as in the prior art.

And as another embodiment of the present invention, in order to increase the rigidity and to secure additional chamber space, it is also possible to form a drain chamber 14 having a chamber space inclined upward in two directions, as shown in Figure 7b, The drain chamber 14 is formed such that the chamber spaces in both directions are symmetrical so that the overall structure becomes a 'V' shape.

That is, upwardly extending inclined in both directions on the outer surface of the flange portion 12 below the shaft inserting portion 11 so that the opening portion 14a is directed upward, and the opening portions 14a are in each direction. Located at the top of the chamber space, the bottom of the chamber space has a structure connected to each other.

In this structure, it is possible to form one drain hole 13 at the connection portion of the two chamber spaces.

Even in the case of the bidirectional chamber structure as described above, each of the chambers has an inclined structure that extends laterally from the lower side of the shaft inserting portion 11, so that each opening portion 14a is located at the top of the chamber space, Even if the coolant is high, it will not pour through the top opening unless it is above a certain level.

There is no need to separately install the sealing cap on the opening 14a, the upper opening may be used as a vent hole for flowing out or to discharge the vaporized vapor when the coolant is overflowed inside.

Meanwhile, in order to mold the pump housing to which the drain chamber structure of the present invention is applied, as shown in FIG. 6, in addition to the upper mold 31 and the lower mold 32 on which the molding parts 31a and 32a for forming the shaft insert 11 are formed. A separate sliding core mold 33 for forming the drain chamber 14 is used.

The sliding core mold 33 is installed in the mold apparatus so as to move in the longitudinal direction of the drain chamber 14 by a predetermined actuator, and as shown in FIGS. 4 to 7B, the inclination direction (arrows) of one side or both sides is shown. (A).

The sliding core mold 33 can be manufactured in a free shape, and the upper and lower molds 31 and 32 are joined to the side in the state where the upper and lower molds 31 are combined, and are combined with the upper and lower molds and moved in the opposite direction when the mold is opened. .

Referring to the molding process of the pump housing using such a mold apparatus, the upper mold 31 and the lower mold 32 are combined by operating in the up and down directions as in the prior art, and then for molding the shape of the drain chamber 14. The sliding core mold 33 is molded by operating in the inclined direction of the side of the upper and lower mold operation directions.

Thereafter, the molten water is injected into the mold under high pressure, and then the upper and lower molds 31 and 32 and the sliding core mold 33 are moved in reverse, and when the mold is opened, the molded pump housing 10 is taken out from the mold.

In this way, the drain chamber structure of the present invention is formed in an inclined structure extending laterally to the outer surface of the flange portion below the shaft insertion portion of the pump housing, and in particular configured to open the opening to the top of the chamber space, There is no need for a conventional sealing cap, and since the opening replaces the conventional vent hole, there is no need for a separate vent hole.

As described above, according to the drain chamber structure of the automotive water pump according to the present invention, it is formed in the inclined structure extending laterally to the outer surface of the flange portion below the shaft insertion portion of the pump housing, in particular the chamber space Since the opening is positioned at the upper end of the opening, there is no need for a conventional sealing cap, it is easy to secure the necessary chamber space, and the opening has the advantage of not having a separate vent hole because it replaces the conventional vent hole.

In addition, since there is no restriction on the shape due to the non-use of the sealing cap, it is possible to manufacture the shape of the drain chamber in a free shape in addition to the existing circular shape, and may be advantageous in terms of rigidity when the chamber shape is molded into a box-shaped closed structure. There is an advantage that the manufacturing cost can be lowered by not using the sealing cap and deleting the sealing cap indentation.

Claims (3)

In the water pump for automobiles, the drain hole is formed to have an inner space on the outer surface of the flange portion below the shaft insert portion of the pump housing and is formed through the shaft insert wall to connect the inner space to the shaft insert portion. In the drain chamber structure of the vehicle water pump having a cooling water discharged to the drain hole is discharged after the accumulation, The shaft insertion portion is formed to extend in the lateral side on the outer side of the flange portion, is formed extending inclined upward from the lower side of the flange portion outer side, the upper end of the interior space of the automobile water pump Drain chamber structure. The method according to claim 1, Drain chamber structure of the water pump for automobiles, characterized in that the flange is formed extending upwardly inclined in one side from the outer side of the outer side is located at the top of the inner space. The method according to claim 1, The car is characterized in that the flange is formed to extend upwardly in both sides from the lower side of the outside of the flange portion so that the open portion is located at the upper end of the inner space in each direction, and the lower ends of the inner spaces at both sides are connected to each other to form a 'V' structure. Drain chamber structure for water pump.

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