JP2001219011A - Oil filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil filter capable of preventing the damage of a filter element by avoiding the collision of oil flowing-in from an inlet passage directly with the lower end surface of the filter element. SOLUTION: In an oil filter 20 provided with a filter housing 21 having the inlet passage 24 and a flow-out passage 26 for oil, a detachable cover 22 to make the filter housing 21 watertight and a filter element 23 which can be taken out from the filter housing 21, accordion-folded filter medium 40 is formed into a cylindrical shape 41, the filter medium 40 in the upper and lower end parts 42 and 43 of the cylindrical shape member 41 join 44 the filter medium 40 to each other to structure the filter element 23 and a umbrella-shaped baffle plate 30 is disposed between the filter element 23 and the inlet passage 24 to cover the whole lower end surface 46 of the filter element 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil filter for filtering oil for an internal combustion engine of an automobile or the like.

[0002]

2. Description of the Related Art As an oil filter for an internal combustion engine such as an automobile, a filter housing 3 having an oil inlet passage 1 and an oil outlet passage 2 as shown in FIGS. 3 (a) and 3 (b).
And a detachable cover 5 having an O-ring 4 for making the filter housing 3 watertight, and a filter element 6 which can be taken out of the filter housing 3. 8
The upper and lower ends 9 and 10 of the filter medium 7 are joined together 11 by the filter medium 7 and used. However, there are actually technical problems described below.

[0003]

That is, in the above-described conventional oil filter, the oil flowing from the inlet passage 1 directly collides with the lower end face 12 of the filter element 6, and particularly when the filter medium 7 is filter paper, The filter medium 7 is damaged by the collision due to the inflow speed of the oil and the impact by the pulsating flow of oil. In this case, there is a problem that unfiltered oil is supplied to the internal combustion engine, causing the internal combustion engine to wear.

[0004] The present invention solves the above-mentioned problems, and prevents the oil flowing from the inlet passage from directly colliding with the lower end surface of the filter element, thereby preventing the filter element from being damaged. To provide a filter.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a filter housing having an oil inlet passage and an oil outlet passage, a detachable cover for making the filter housing watertight, and removing the filter housing from the filter housing. And a filter element, wherein the filter element is formed by joining bellows-shaped upper and lower ends of a filter material which is folded in a bellows shape, and the filter element and the inlet An umbrella-shaped deflector is provided between the passage and the passage so as to cover the entire lower end surface of the filter element and prevent the oil flowing from the entrance passage from directly colliding with the filter medium. .

According to the above construction, an umbrella-shaped deflector is provided between the filter element and the inlet passage so as to cover the entire lower end surface of the filter element, so that the oil flowing from the inlet passage directly passes through the lower end surface of the filter element. Thus, an oil filter that prevents collision with the filter and prevents damage to the filter medium can be obtained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of an oil filter according to the present invention, and FIG. 2 is a perspective view of a lower end portion of the filter element. As shown in FIG. 1, the oil filter 20 includes a housing 21, a cover 22, and a filter element 23.

The housing 21 includes an inlet passage 24, an outlet passage 26 for supplying oil filtered inside the outlet tube 25 to the internal combustion engine, a convex annular portion 27 formed on the outer periphery of the outlet tube 25, An inner screw portion 29 formed on the inner surface of the open end 28. And, on the outer periphery of the outlet tube 25,
Holding portion 30 held on the inner peripheral portion fitted into convex ring portion 27
a and an umbrella-shaped baffle plate 30 having a rising portion 30b at the top.
Is provided.

The cover 22 has an external thread portion 32 formed on the outer surface of the lower opening end 31, an O-ring 34 fitted in an O-ring groove 33, and a holding convex ring portion 35 formed on the upper portion.
A spring 36 which is arranged on the outer periphery of the filter and presses the filter element 23;
Inner cylinder 3 having stepped portion 37b and inner convex portion 37c
7 and a valve 39 provided on the inner convex portion 37b via a spring 38.

In the filter element 23, the filter material 40 folded in a bellows form a cylindrical shape 41, and upper and lower end portions 42, 43 of the filter material 40 formed into the cylindrical shape 41 are joined 44 with each other. Further, packings 47, 48 are attached to the upper and lower end surfaces 45, 46 of the filter element 23.

The cover 22 is attached in a watertight and detachable manner by screwing the outer thread 32 to the inner thread 29 of the housing 21 via an O-ring 34. At this time,
The filter element 23 is pressed by the spring 36 into the cover 22 and the housing 21. Further, the packings 45 and 46 cover the outer surface of the stepped portion 37 b of the inner cylinder 37, the outer periphery of the outlet cylinder 25 of the housing 21, and the entire lower end surface 46 of the filter element 23. The filter element 23 is held between the umbrella-shaped deflector plate 30 and the holding portion 30a of the umbrella-shaped deflector plate 30 to prevent leakage of the filter element 23.

In the above configuration, the oil flowing from the inlet passage 24 is supplied to the lower end surface 46 of the filter element 23.
By the umbrella-shaped deflector 30 covering the whole, the oil enters the housing 36 without directly colliding with the filter medium 40 of the filter element 23, and the oil that has been filtered by the filter element 23 and is cleaned passes through the outflow passage 26 to the internal combustion engine. Supplied.

When the filter element 23 is clogged, the valve 39 is opened by overcoming the pressing force of the spring 38, and the oil flows out from the outflow passage 26 through the flow hole 37a of the inner cylinder 37 to the internal combustion engine. At this time, since the filter element 23 has reached the use limit, the cover 22 is removed from the housing 21 and replaced with a new filter element 23. As described above, the oil flowing from the inlet passage 24 is supplied to the lower end face 4 of the filter element 23.
Since the umbrella-shaped deflector plate 30 covering the whole 6 does not directly collide with the filter medium 40 of the filter element 23, the filter medium 40 may be damaged by collision due to the inflow speed of the oil or impact due to the pulsating flow of the oil. It has the effect of disappearing.

[0014]

According to the above construction, the oil flowing from the inlet passage does not directly collide with the filter material of the filter element by the umbrella-shaped deflector covering the entire lower end surface of the filter element. The filter material is not damaged by the collision due to the inflow speed of the oil and the shock due to the pulsating flow of the oil, and the deflector is umbrella-shaped, so it does not obstruct the oil flow and does not increase its resistance. effective.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an oil filter according to a preferred embodiment of the present invention.

FIG. 2 is a perspective view of a lower end of a filter element of the oil filter.

FIG. 3A is a cross-sectional view showing a conventional oil filter.
(B) is a perspective view of the lower end of the filter element of the oil filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Housing 22 Cover 23 Filter element 24 Inlet passage 26 Outflow passage 30 Umbrella-shaped deflector 40 Filter material 41 Cylindrical shape 42, 43 Upper and lower end portions 44 Joining 46 Lower end surface

Claims (1)

[Claims] 1. An oil filter comprising: a filter housing having an oil inlet passage and an oil outflow passage; a detachable cover that makes the filter housing watertight; and a filter element that can be taken out of the filter housing. The upper and lower ends of the filter material formed into a bellows-folded cylindrical shape are formed by joining the filter materials together, and cover the entire lower end surface of the filter element between the filter element and the inlet passage. An oil filter comprising an umbrella-shaped deflector for preventing oil flowing from an inlet passage from directly colliding with the filter medium.