JPS592811Y2 - oil filter element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oil filter element equipped with an annular filter paper, and an object thereof is to increase the effective filtration area of the annular filter paper.

Generally, internal combustion engines such as automobile engines are provided with an oil filter in order to remove impurities such as metal powder, carbide, and sand mixed in the lubricating oil.

The oil filter element used in this oil filter usually consists of an annular filter paper, a core tube inserted into the center of the annular filter paper, and filter paper support plates that support the upper and lower end surfaces of the annular filter paper. As shown in FIG. 1, it was constructed by bending a band-shaped filter paper material 1 alternately in directions perpendicular to its longitudinal direction and joining both ends of the filter paper material 1.

Therefore, as shown in FIG. 2, the lubricating oil passes through the annular filter paper 2 from outside the annular filter paper 2, and further flows into the core tube 3 through the holes 4 formed on the outer circumferential surface of the core tube 3. Then, as shown in FIG. 3, the inner surfaces of the tops of the respective peaks 2a of the annular filter paper 2 come into pressure contact with each other due to the pressure of the lubricating oil, and as a result, in the conventional oil filter, The filtration effect at the pressure contact portion cannot be expected, and the effective filtration area becomes extremely small compared to the apparent filtration area.

In view of these drawbacks, the present invention is designed to increase the effective filtration area by allowing each peak of the annular filter paper to withstand the force that opposes the pressure of lubricating oil.

The present invention will be explained below with reference to the illustrated embodiment. In FIG. 5, 1 is a band-shaped filter paper material treated with a resin such as phenol resin or epoxy resin. The annular filter paper 5 is formed by bending the filter paper material 1 alternately along the curved line 1a or straight line, and joining both ends of the filter paper material 1 (see FIG. 4).

In this state, no force is acting on each peak 5a of the annular filter paper 5, and the upper and lower end surfaces of the annular filter paper 5 are
It is inclined from a direction perpendicular to the axis of its center.

As shown in FIG. 6, a core tube 3 having a number of holes 4 bored on the same surface on the outside is inserted into the center of the annular filter paper 5.
Filter paper support plates 6 that support the upper and lower end surfaces of the annular filter paper 5 are attached to the upper and lower ends of the core tube 3 so as to be perpendicular to the axial direction of the core tube 3, respectively.

Therefore, the upper and lower end surfaces of the annular filter paper 5 are
As a result, pre-tension is applied to each inclined crest 5a of the annular filter paper 5, which acts as a counterweight against the pressure of the lubricating oil. force is tolerated.

Therefore, in the oil filter element according to the present invention, even if the pressure of lubricating oil acts on each ridge of the annular filter paper, each ridge can withstand a counterforce against the pressure, unlike the conventional one. The inner surface of the top of the crest is not pressed into contact with the pressure of the lubricating oil, which has the excellent effect of increasing the effective filtration area and increasing the filtration capacity compared to the conventional method. .

[Brief explanation of the drawing]

Fig. 1 is a developed view of a conventional annular filter paper, Fig. 2 is a cross-sectional view showing the ridges of the conventional annular filter paper in a state where no lubricating oil pressure is applied, and Fig. 3 is the ridges shown in Fig. 2. 4 to 6 show an embodiment of the present invention, FIG. 4 is a perspective view of the oil filter element, and FIG. 5 shows the development of the annular filter paper. Figure 6 is the 4th
FIG. 3 is a longitudinal cross-sectional view of the oil filter element shown in the figure. 1... Filter paper material, 3... Core tube, 5...
. . . Circular filter paper, 6 . . . Filter paper support plate.

Claims (1)

[Scope of utility model registration request] A band-shaped filter paper material is tilted and bent alternately from a direction perpendicular to its longitudinal direction, and both ends of the filter paper material are joined to form a cylindrical annular filter paper with a wavy horizontal section, and , filter paper support plates that support the upper and lower end surfaces of the annular filter paper are provided at the upper and lower ends of the core tube inserted into the center of the annular filter paper, respectively, perpendicular to the axial direction of the core tube, and each of the filter paper support plates An oil filter element characterized in that the upper and lower end surfaces of the annular filter paper are held under pressure to apply pretension to the annular filter paper.