JPH0437215Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an oil filter, and more particularly, to a mounting structure for a filter element.

[Prior art]

FIG. 3 shows a conventional oil filter.

This oil filter uses a part of a crankcase, a clutch cover, etc. as a filter housing 1, and a filter element 4 is interposed between an oil inlet passage 2 and an oil outlet passage 3 bored in the housing 1. The oil pumped from an oil pan (not shown) or the like is purified and supplied to each element of the engine (not shown).

The filter element 4 is connected to the second bottom plate 5.
A hole 5a is formed in the center of the upper plate 6, and a relief valve 7 is provided in the center of the first upper plate 6. On the other hand, a boss 8 having an open end of the oil outflow passage 3 is formed in the filter housing 1 in a chamber filter chamber 9 .

The filter element 4 has a bottom plate 5 thereof.
is positioned in the chamber 9 by fitting the through hole 5a into the boss 8, and is positioned in the chamber 9 by a spring 11 interposed between the lid 10 that covers the chamber 9 and the upper plate 6. will be established.

In such an oil filter, the oil is
As shown by the arrow in the figure, the oil is fed under pressure from the oil inflow path 2 to the oil outflow path 3 via the filter element 4. In addition, in this oil filter, when the filter element 4 becomes clogged and the flow of oil is blocked, the relief valve 7 is opened, and the oil in the oil inflow path 2 flows through the relief valve 7 to the oil outflow path 3. The oil is supplied to each element of the engine (not shown) to ensure lubrication.

By the way, the above oil filter has
For example, as shown in FIG. 4, when the upper plate 6 is seated facing the inner bottom surface of the chamber 9, the bottom plate 5 of the filter element 4 may be located inward from the fastening area of the lid body 10. .

In such an oil filter, since the chamber 9 can be covered with the lid 10 as it is, the filter element 4 may be loaded in the opposite direction. In such a case, the fourth
As is clear from the figure, the oil outflow path 3 is blocked, making it impossible to supply oil to each element of the engine. Such a situation will lead to seizure of various engine elements and must be avoided at all costs.

[Purpose of invention]

An object of the present invention is to provide an oil filter that ensures oil supply to each element of the engine even when the filter element 4 is loaded in the opposite direction.

[Structure of the idea]

Therefore, in the present invention, the above object is achieved by forming a protrusion on the end face of the cylindrical protruding end portion that positions the oil outflow path opening edge, that is, the filter element.

That is, in the oil filter of the present invention, even when the filter element is loaded in the opposite direction, the first plate of the filter element or the relief valve hits the protrusion, and the part other than the protrusion is exposed to the first plate of the filter element. A gap is provided in between to allow oil to circulate.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 shows an oil filter according to the present invention.

Similar to the conventional oil filter shown in FIG. 1, this oil filter also utilizes a part of the crankcase, clutch cover, etc. as a filter housing 21, and has an oil inlet passage 22 and an oil outlet hole formed in the housing 21. A filter element 24 is interposed between the filter element 24 and the passage 23 to purify oil pumped by a pump from an oil pan or the like (not shown) and supply it to each element of the engine (not shown). The filter element 24 of this oil filter is also similar to that shown in FIG.
Hole (through hole) in the center of the bottom plate (second plate) 25
25a is formed, and the upper plate (first plate)
In the center of 26 is a relief valve 27 facing inward.
is installed protrudingly.

Further, in the filter housing 21, a boss 28 having an open end 23a of the oil outflow passage 23 is formed in the chamber filter chamber 29, and a projection 28a is formed on a part of the end surface of the boss 28.

Furthermore, this oil filter has a lid 30 that covers the chamber 29 of the housing 21, and the projection 28a of the boss 28 of the lid 30
A rib 30a is formed at a position facing the.

In this oil filter, as shown in FIG. 1, the filter element 24 is positioned within the chamber 29 by fitting the hole 25a of the bottom plate 25 into the boss 28. A spring 31 is disposed on the plate 24, and the lid 30 is fastened to the housing 21 from above to be loaded into the chamber 29.

Therefore, the oil pumped into the chamber 29 through the oil inflow path 22 by an oil pump (not shown) passes through the filter element 24 as indicated by the arrow in FIG.
The oil is supplied to the oil outflow path 23 from there.

By the way, when replacing the filter element 24, etc., when the upper plate 26 is seated facing the inner bottom surface of the chamber 29, the filter element 24
As shown in FIG. 2, the upper plate 26 rides on the projection 28a of the boss 28, so
The chamber 29 of 1 is in an inclined state.

In this state, the lid 30 is attached to the housing 2.
1, the rib 30a of the lid 30 hits the bottom plate 25 of the filter element 24, and the lid 3
0 to the housing 21 becomes difficult.

Therefore, it can be easily seen that the filter element 24 is in the opposite direction.

Moreover, even when the lid body 30 is forcibly fastened to the housing 21 in the above-mentioned state, the projection 28a formed on a part of the end surface of the boss 28 creates a gap between the upper plate 26 of the filter element 24 and the boss 28. Since the gap is ensured, the oil in the chamber 29 flows to the open end 23 as shown by the arrow in FIG.
The oil is fed to the oil outflow path 23 via a.

[Effect of idea]

As described above, in the oil filter according to the present invention, since the protrusion is formed at the open end of the oil outflow path, the oil passage can be secured even when the filter element is loaded in the opposite direction. Even if the filter element is forcibly deformed and pushed in, the oil passage is secured.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an oil filter according to the present invention, Fig. 2 is a sectional view showing the oil filter with the filter element seated in the opposite direction, and Fig. 3 is a conventional oil filter. 4 is a cross-sectional view showing the oil filter in a state where the filter element is loaded in the opposite direction. 21... Filter housing, 22... Oil inflow path, 23... Oil outflow path, 23a... Open end, 24... Filter element, 25... Second
Plate, 25a...Through hole, 26...First plate, 28...Protruding end, 28a...Protrusion, 29
... Filter chamber, 30 ... Lid body, 30a ... Rib, 31 ... Spring.

Claims (1)

[Claims for Utility Model Registration] It has a cylindrical shape with a first plate and a second plate disposed on both end faces, and the second plate has a through hole in the center, and the first plate has a through hole in the center.
A filter element having a relief valve protruding inward from the center of the plate, a concave shape formed in the filter housing to accommodate this filter element, an oil inflow passage opening on the inner peripheral surface, and an inner bottom surface. A filter chamber having a cylindrical end projecting from the center of the oil outflow passage, the opening of which is closed by a lid with a spring interposed between the filter chamber and the filter element; When the second plate is seated opposite to the inner bottom surface of the filter chamber, the filter element is loaded into the filter chamber with the cylindrical protruding end of the oil outflow passage inserted into the through hole of the second plate. On the other hand, when the first plate is seated facing the inner bottom surface of the filter chamber, the filter element is loaded with oil into the filter chamber with the opening of the oil outflow path covered by the relief valve. In the filter, when the first plate is seated on a part of the end face of the cylindrical protruding end portion facing the inner bottom surface of the filter chamber, the first plate or the relief valve comes into contact with the first plate, and the first plate contacts the first plate or the relief valve. An oil filter characterized in that a protrusion is formed to ensure a gap between the opening of the oil outflow path and the relief valve.