JP2000279719A - Oil strainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil strainer to efficiently drop dust into a dust collection place. SOLUTION: In the oil strainer provided with an upper body 1 having an outflow port 5, a lower body 2 having an inflow port 6, and a filter 3 sandwiched with both bodies 1, 2, the dust in the oil can be collected on a filter surface right under the outflow port of the upper body or in its vicinity due to the total flow of the oil by forming a recessed dust collection place 9 on the bottom of the lower body positioned right under the outflow port. Since the dust collection place is formed on the bottom of the lower body positioned right under the outflow port, when an engine is stopped, the oil flows down on the filter surface right under the outflow port 5 via the outflow port from an oil pump side and the dust collected on the filter surface efficiently drops on the corresponding dust collection place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil strainer used mainly for automatic transmissions and transfers of automobiles.

[0002]

2. Description of the Related Art As a conventional oil strainer of this kind,
There is one disclosed in Japanese Patent No. 2717271. Although not specifically shown, the conventional oil strainer includes an upper body having an outlet, a lower body having an inlet, and a filter sandwiched between the two bodies.
By forming both the upper body and the lower body into a cross-sectional mountain shape and joining the both bodies in an inclined shape, the filter is arranged at a predetermined angle with respect to the both bodies, and the filter is furthest from the inlet of the lower body A concave dust accumulation is formed at the bottom of the inclined upper side. The concave dust accumulation is located farthest from the outlet of the upper body.

In actual use, an oil strainer having such a structure is connected to an oil pump, and the oil pump is operated.
From the inlet of the lower body, the oil is sucked into the body defined by the upper body and the lower body, where the oil is filtered by the filter. Is carried in the above-described dust accumulation direction together with the flow of oil.

[0004]

Therefore, in the conventional oil strainer, theoretically, the life of the filter is improved by collecting the dust trapped in the filter in the dust pool. However, as a practical problem, such dust accumulation is provided on the inclined upper bottom of the lower body farthest from the inlet or outlet, so that it is difficult for dust to accumulate, and if the dust Even if dust was trapped on the filter surface near the pool, the dust could not easily fall into the dust pool, and in any case, a sufficient effect could not be expected.

[0005]

SUMMARY OF THE INVENTION The present invention has been developed in order to effectively solve the problems of the conventional oil strainer, and the invention according to claim 1 has an upper body having an outlet and an upper body having an outlet. An oil strainer having a lower body having an inlet and a filter sandwiched between the two bodies has a configuration in which a concave dust reservoir is formed at the bottom of the lower body located immediately below the outlet.

According to a second aspect of the present invention, there is provided an oil strainer including an upper body having an outlet, a lower body having an inlet, and a filter sandwiched between the two bodies. A configuration is adopted in which a guide surface for guiding oil in the direction of the outlet is formed, and a concave dust reservoir is formed at the bottom of the lower body located immediately below the outlet following the guide surface.

According to a third aspect of the present invention, based on the second aspect, the depth of the dust reservoir has a depth at which the oil in the dust reservoir is not agitated by the streamline of the oil formed by the guide surface. The configuration was adopted.

According to a fourth aspect of the present invention, based on the first to third aspects, a configuration is adopted in which the outlet is opened at one end of the upper body and the inlet is opened at the other end of the lower body. did.

Therefore, in the first aspect of the present invention,
Dust in the oil is trapped on the entire surface of the filter, and is then gradually pushed toward the outlet of the upper body by the overall flow of the oil, and concentrates on the filter surface near the outlet. Since a dust accumulation was formed at the bottom of the lower body located immediately below the outlet, when the engine was stopped, oil from the oil pump side descended onto the filter surface immediately below the outlet via the outlet, and was caught by the filter surface. Since it is possible to efficiently drop the dust that has fallen into the corresponding dust pool, the life of the filter can be greatly improved.

[0010] Even in the invention described in claim 2, claim 1
Similarly to the above, dust in the oil is trapped on the entire surface of the filter, and then gradually pushed toward the outlet of the upper body by the overall flow of the oil, and concentrates on the filter surface near the outlet. However, since a dust accumulation was formed at the bottom of the lower body located directly below the outlet, when the engine was stopped, oil from the oil pump side passed through the outlet and dropped on the filter surface immediately below it,
The dust trapped on the filter surface can be efficiently dropped into the corresponding dust pool. In addition to this, the presence of the guide surface makes it possible to efficiently guide the entire oil flow toward the outlet, so that a large amount of dust in the oil is captured on the filter surface immediately below the outlet. At the same time, the dust accumulated in the dust pool is not affected by the flow of the oil, so that the dust does not float again from the dust pool.
According to the third aspect of the present invention, since the depth of the dust pool is set to such a depth that the oil in the dust pool is not agitated by the streamline of the oil formed by the guide surface, the dust accumulated in the dust pool is reduced. Re-floating can be more reliably prevented.

According to the fourth aspect of the present invention, the outlet is opened at one end of the upper body, and the inlet is opened at the other end of the lower body. Since the oil can be used uniformly and the direction of the streamline of the oil is kept constant, the dust can be concentrated and captured at one location immediately below the outlet.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an oil strainer according to a preferred embodiment of the present invention; FIG. 1, a lower body 2 having an inlet 6;
Filter 3 whose periphery is clamped between both bodies 1 and 2
And a support frame 4 for the filter 3.

More specifically, first, the upper body 1 is formed in a desired rectangular shape into a thin shape with a synthetic resin, and a flow port connected to the oil pump side near one end in the longitudinal direction. The outlet 5 is opened, and a plurality of bosses 7 for pressing the support frame 4 are vertically provided at the center of the inner surface in a straight line.

The lower body 2 has a shape similar to that of the upper body 1 and is formed of a synthetic resin in a thin shape. While the inflow port 6 is opened, an inclined guide surface 8 for guiding oil toward the outflow port 5 of the upper body 1 is formed at the bottom thereof, and directly below the outflow port 5 of the upper body 1 continuing from the guide surface 8. The concave dust reservoir 9 is formed actively at the bottom portion located at. Therefore, the dust reservoir 9 is located at the one end side of the lower body 2 in the longitudinal direction, at the back of the guide surface 8. Further, the depth of the dust reservoir 9 is set to a sufficient depth that the oil in the dust reservoir 9 is not stirred by the oil stream formed by the guide surface 8.

Further, the support frame 4 obtains a contact state with each boss 7 of the upper body 1 to prevent the filter 3 from warping or deforming toward the upper body 1 due to negative pressure of oil suction. Further, in order to maximize the filtration area, the upper body 1 is formed in a lattice shape with a synthetic resin having a shape similar to the upper body 1 and the filter 3 is also formed.
It is formed from a metal mesh with a shape similar to the above.

Therefore, under the oil strainer having such a configuration, the upper body 1 and the lower body 2 are arranged while the filter 3 and the support frame 4 are addressed inside the lower body 2.
If the opposing peripheral portions are joined by welding, the entire strainer can be easily assembled.

In actual use, though not specifically shown, the outlet 5 side of the upper body 1 is connected to an oil pump, and the oil pump is operated. From the inlet 6 of the lower body 2
The oil is sucked into the body defined by the upper body 1 and the lower body 2, and the oil is filtered there by the filter 3. Under the present embodiment, as described above, the oil inlet 6 and the outflow port 5 are opened at diametrically opposite positions, and the inclined guide surface 8 is formed at the bottom of the lower body 2, so that the oil streamline direction is always kept constant as shown in FIG. As a result, the filtration area of the filter 3 can be used uniformly over the whole, so that the filtration efficiency is also improved.

In order to keep the oil flow constant, it is necessary to gradually push the dust trapped on the surface of the filter 3 toward the outlet 5 of the upper body 1 and to move the dust immediately below the outlet 5 or in the vicinity thereof. Since it is possible to cause the filter 3 to be caught in one place on three surfaces, there is no fear that the entire filter 3 will be clogged. However, in the present embodiment,
In particular, dust is intensively captured immediately below the outlet 5 or in the vicinity thereof.

In this state, when the engine is stopped and the operation of the oil pump is stopped, as shown in FIG. 3, the oil drops from the oil pump through the outlet 5 onto the filter 3 immediately below. As a result, the dust trapped on the surface of the filter 3 is efficiently dropped into the corresponding dust pool 9, so that the life of the filter 3 can be greatly improved.
It is noted that heavy dust falls into the dust pool 9 by its own weight without using the descent force of the oil.

Then, when the engine is started again and the oil pump is operated, the oil in the oil pan is similarly defined by the upper body 1 and the lower body 2 from the inflow port 6 of the lower body 2. Sucked inside the body,
Then, the oil is filtered by the filter 3. At this time, the flow of the oil is positively directed toward the outlet 5 of the upper body 1 due to the presence of the guide surface 8 formed at the bottom of the lower body 2. Therefore, there is no fear that the oil enters the dust reservoir 9 and re-suspends the dust accumulated in the dust reservoir 9. Therefore, according to the present embodiment, in the process of repeatedly starting and stopping the engine, dust in the oil is efficiently removed, so that the life of the filter 3 can be extended. is there.

Further, as described above, the depth of the dust reservoir 9 itself has a sufficient depth that the oil in the dust reservoir 9 is not agitated by the streamlines of the oil formed by the guide surface 8. The dust accumulation 9
It is possible to more reliably prevent the dust stored in the tank from re-floating.

[0022]

As described above, according to the present invention, according to the first aspect of the present invention, dust in oil is trapped on the entire surface of the filter. Pushed toward the outlet of the upper body,
Although it will concentrate on the filter surface in the vicinity of the outlet, dust accumulation is formed at the bottom of the lower body located immediately below the outlet, so when the engine is stopped, oil from the oil pump side passes through the outlet directly under the oil outlet. And the dust trapped on the filter surface can be efficiently dropped into the corresponding dust accumulation, so that the life of the filter can be greatly improved.

Also in the case of the second aspect, similarly to the first aspect, dust in the oil is trapped on the entire surface of the filter and then gradually pushed toward the outlet of the upper body by the entire flow of the oil. Therefore, it will concentrate on the filter surface in the vicinity of the outlet, but since a dust reservoir is formed at the bottom of the lower body located immediately below the outlet, when the engine is stopped, oil from the oil pump side passes through the outlet. It is possible to efficiently drop the dust trapped on the filter surface immediately below the filter surface to fall into the corresponding dust pool. In addition to this,
The presence of the guide surface makes it possible to efficiently guide the entire flow of the oil toward the outlet, so that a large amount of dust in the oil can be captured on the filter surface immediately below the outlet, and the dust Since the dust accumulated in the reservoir is not affected by the flow of the oil, the dust does not float again from the dust reservoir. According to the third aspect of the present invention, the depth of the dust pool is set to a depth at which the oil in the dust pool is not agitated by the streamline of the oil formed by the guide surface. Can be more reliably prevented.

According to the fourth aspect, the outflow port is opened at one end of the upper body and the inflow port is opened at the other end of the lower body, so that the filter area of the filter is uniformly used throughout. This makes it possible to keep the oil streamline direction constant, so that dust can be concentrated and captured at one location immediately below the outlet.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an oil strainer according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a streamline direction of oil.

FIG. 3 is a cross-sectional view illustrating a drop of oil and a drop of dust.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper body 2 Lower body 3 Filter 4 Support frame 5 Outlet 6 Inlet 7 Boss 8 Guide surface 9 Dust accumulation

Claims (4)

[Claims] 1. An oil strainer comprising: an upper body having an outlet; a lower body having an inlet; and a filter sandwiched between the two bodies. An oil strainer characterized by forming a dust pool. 2. An oil strainer comprising: an upper body having an outflow port, a lower body having an inflow port, and a filter sandwiched between the two bodies; An oil strainer, wherein a guide surface is formed and a concave dust reservoir is formed at a bottom of a lower body located immediately below an outlet opening from the guide surface. 3. The depth of the dust reservoir is such that the oil in the dust reservoir is not agitated by the oil stream formed by the guide surface.
The described oil strainer. 4. The oil strainer according to claim 1, wherein the outlet is opened at one end of the upper body, and the inlet is opened at the other end of the lower body. .