JPH10323512A - Oil filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive an oil filter to make it lightweight and to lower the manufacturing cost by forming an annular projected wall on the other side of an end cover, also fitting the outer surface of the opening of a cover cylinder made by molding a synthetic resin in the inner wall of the projected wall and bearing the bottom part of the cover cylinder by a supporting frame of an element. SOLUTION: The main part of an oil filter 10 consists of an end cover 11 fitted to the side face of an engine, an element 12 supported on one side thereof and a cap-shaped cover cylinder 13 fixed to the end cover 11. Both the end parts of the element 12 made in the shape of a cylinder are closed by almost disc-shaped first and second covers 14, 15 made of a synthetic resin. The end cover 11 that a synthetic resin is molded to make it an almost disc like shape is provided with an oil sending port 11b in the central part thereof. At the outer end part of the end cover 11, a relatively low annular projected wall 24 facing the opposite side of the engine is formed. The cap-shaped cover cylinder 13 is constituted of a cylindrical body part 13b and a disc part 13c for closing the one end thereof and is made by injection-molding an oil resistant synthetic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replaceable oil filter used for an oil passage for lubricating an engine of an automobile or a motorcycle, and more particularly, to an oil filter mainly made of synthetic resin.

[0002]

2. Description of the Related Art Conventionally, an oil filter used in a motorcycle or an automobile engine is shown in FIG.
Element E on steel end cover B attached to the engine
And is covered with a cup-shaped lid tube C. The end cover B is composed of a central portion 1B made of a thick steel plate and a thin portion 2B welded to a peripheral portion thereof, and the thin portion 2B and the opening of the cover cylinder C are so-called a winding process M. Are joined by S is a seal member supported by the inner peripheral edge of the thin portion 2B, and covers the oil supply passages P and Q.
It is attached along the periphery of the end cover B. On the other hand, recently, in order to reduce the weight of the oil filter and reduce the manufacturing cost, parts that were conventionally made of iron have been sequentially changed to synthetic resins.

[0003]

The applicant has made further efforts to reduce the weight and the manufacturing cost of the oil filter and to consider making the end cover B itself a synthetic resin. However, the connection of the end cover B to the cover cylinder C is considered. The highly reliable winding process M conventionally used for the part could not be abolished. Therefore, in the conventional oil filter, the lid cylinder C attached to the end lid B is made of metal. That is, the end cover B is a mixture of a steel plate and a synthetic resin, and the weight reduction and the cost reduction are insufficient.

[0004]

SUMMARY OF THE INVENTION As described above, the present invention provides a substantially disk-shaped end cover which is screw-engaged on one side to an engine side, and supports an element supported on the other side of the end cover. A frame is provided, and an annular protruding wall is formed on the other side of the end cover, and an outer surface of an opening portion of a lid tube made by molding a synthetic resin is fitted on an inner surface of the protruding wall, and The bottom is supported by a support frame of the element. A substantially disk-shaped end cover for supporting the element on one side is constituted by a metal screw hole member arranged in the center portion and a synthetic resin annular member provided around the periphery thereof. The annular member is inserted into a screw hole member. Further, a flange is connected to the outer periphery of the screw hole member, and the flange is annularly protruded to one side of the annular member to form a holding member for the seal member.

[0005]

The cover cylinder is fitted on the inner surface of the protruding wall provided on the end cover, and a sufficient bonding area sufficient to maintain a high bonding strength can be obtained. Since the inner surface of the bottom inner surface of the lid tube, that is, the portion that becomes the protruding end when attached to the engine, is supported by the support frame of the element, it is held immovably until the adhesive is hardened. The end lid is formed of a synthetic resin except for a screw hole member arranged at the center. The screw hole member is inserted into an annular member made of synthetic resin and is held firmly. A flange is attached to the screw hole member, which is connected to the annular member at a large portion, and holds the seal member.

【Example】

Hereinafter, the present invention will be described with reference to the illustrated embodiments. In FIG. 1, reference numeral 10 denotes an oil filter.
As shown in FIG. 2, the main part of the oil filter 10 includes an end cover 11 attached to the side of the engine, an element 12 supported on one side thereof, and the end cover 11 covering the outside of the element 12. Cup-shaped lid tube 13 to be fixed
And so on. Reference numeral 13a denotes a known polygonal portion formed on the outer peripheral surface of the lid tube 13;
Is used to engage a screw tool when attaching and detaching to a recirculation pipe of an engine (not shown).

The element 12 is formed by bending a long and narrow filter paper material a number of times, and further connecting both ends of the filter paper material into a cylindrical shape.
A substantially disk-shaped first lid 14 and a second
It is closed by the lid 15. 16 is element 1
2 is a valve body of a check valve made of a rubber-like elastic body attached to a lower end portion of the end cover 2 and opens and closes a lubricating oil return port 11 a provided in the end cover 11. Reference numeral 17 denotes a known emergency valve provided on the second lid 15, which is interposed in an emergency oil passage 20 that bypasses the element 12. The valve is opened when the pressure difference between the front and back of the element 12 becomes larger than expected due to clogging of the element 12. Reference numeral 18 denotes an oil seal supported by the end cover 11, and has an outer diameter portion 1 having a semi-cylindrical cross section.
8a and a hollow disk-shaped inner diameter portion 18b.

[0008] The end cover 11 is formed in a substantially disc shape by molding a synthetic resin, and an oil feed port 11b formed of a screw hole for feeding oil to the engine is provided at the center thereof. The oil feed port 11b is not always formed of such a synthetic resin, and as shown in FIG. 5, a cylindrical screw hole member 21 made of steel is inserted and a lubricating oil A plurality of through holes forming the return port 11a are formed. 5, an annular flange member 23 made of a steel plate is welded to the outer peripheral surface of the screw hole member 21.
3 protrudes from the end cover 11 toward the engine,
The inner end of the oil seal 18 disposed on the engine side is suppressed. The outer end of the end cover 11 is formed with a relatively low annular protruding wall 24 having a height of about 3 mm facing the side opposite to the engine. Note that the configuration in which the flange member 23 is provided on the screw hole member 21 is not essential. As shown in FIG. 2, instead of the flange member 23, an engagement for holding the oil seal 18 on the engine-side side surface of the end cover 11 is performed. If the portion 25 is provided, the weight of the end cover 11 can be further reduced. However, the flange member 23 is connected to the return port 11a as in the embodiment.
To the outside of the end cover 11, the end cover 11
The seating surface of the valve element 16 of the check valve can be stabilized without paying attention to the material of the valve.

The cup-shaped lid tube 13 has a cylindrical body 13b.
And a disk portion 13c whose one end is closed, and is made by injection molding an oil-resistant synthetic resin. Except for the opening 13d, the lid cylinder 13 is formed to have substantially the same overall thickness. The opening 13d bulges outward and is formed to be thick, and its outer peripheral surface is formed in a circular shape.
The protruding wall 24 is fitted to the inner diameter portion and is inseparably connected by bonding, fusion or other means. Reference numeral 19 denotes a spacer, which is composed of three substantially square sponge-like elastic bodies, and the spacer 19 is provided on the outer peripheral edge of the second lid 15 and the lid cylinder 1.
3 and is supported by being deformed into a substantially L-shape as shown in the figure according to their shapes. As described above, since the outer peripheral edge of the second lid 15 and the bottom peripheral edge of the lid cylinder 13 are connected via the spacer 19 or are supported by each other, the projection wall 24 and the lid both made of synthetic resin are used. The stress generated at the joint between the cylinder 13 and the opening 13d can be reduced, and the risk of disconnection can be reduced.

[0010]

According to the first aspect of the present invention, the material of the lid cylinder can be made of synthetic resin without lowering the bonding strength to the end lid. According to the second aspect of the present invention,
Since the screw hole member is made of a metal having a smaller thermal expansion than that of the synthetic resin, the end cover does not expand due to the heat of the lubricating oil and the connection with the engine is not loosened. Further, according to the third aspect of the present invention, it is not necessary to separately prepare a holding member for holding the sealing member, and the number of parts can be reduced and the manufacturing can be easily achieved. And so on.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along the line II-II.

FIG. 3 is a bottom view thereof.

FIG. 4 is a sectional view taken along the line IV-IV.

FIG. 5 is a sectional view corresponding to FIG. 2, showing another embodiment.

FIG. 6 is a sectional view showing a conventional oil filter, corresponding to FIG.

[Explanation of symbols]

10 ··· Oil filter 11 ···
・ End cover 11a ・ ・ ・ Reflux port (through hole) 11b ・ ・
・ Oil port 12 ・ ・ ・ ・ ・ ・ Element 13 ・ ・ ・
・ Cover cylinder 13a ・ ・ ・ Polygonal part 13b ・ ・
・ Body 13c ・ ・ ・ Disc 13d ・ ・
· Opening 14 ··· First lid 15 ···
· Second lid 16 ··· Valve element of check valve 17 ···
・ Emergency valve 18 ・ ・ ・ ・ Oil seal 18a ・ ・
・ Outer diameter part 18b ・ ・ ・ Inner diameter part 19 ・ ・ ・
・ Spacer 20 ・ ・ ・ ・ Emergency oil passage 21 ・ ・ ・
・ Screw hole member 23 ・ ・ ・ ・ ・ ・ Flange member (annular member) 24 ・ ・ ・
・ Protrusion 25 ・ ・ ・ ・ Locking part

Claims (3)

[Claims] 1. An end cover having a substantially disk shape to be screw-engaged with an engine, and a support frame for an element supported on the other side of the end cover. An oil filter comprising a wall, an outer surface of an opening of a lid tube formed by molding a synthetic resin on an inner surface of the protruding wall, and a bottom portion of the lid tube supported by a support frame of the element. 2. A substantially disk-shaped end cover for supporting an element on one side surface, a metal screw hole member disposed at a central portion,
An oil filter comprising an annular member made of a synthetic resin provided around the periphery thereof, wherein the annular member is inserted into a screw hole member. 3. A seal member according to claim 2, wherein a flange is connected to an outer periphery of said screw hole member, said flange projects annularly to one side of said annular member, and supports a support member of a seal member provided on an end face of said end cover. An oil filter formed.