JPH0135212Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to an oil filter used in an internal combustion engine.

<Summary of the invention> Instead of an end plate fixed to the annular end face of the filter element, an annular recess is formed at the closed end of the cylindrical casing, the annular end face is fitted and fixed into this, and the other end side and the opening face of the casing are An elastic seal is interposed between the lids fixed to the casing so that the filter element is always elastically biased toward the closed end of the casing, simplifying the structure and reducing the number of parts.
Improved assembly workability.

<<Prior Art>> FIG. 2 shows a conventional oil filter. In the figure, this oil filter is roughly composed of a cylindrical casing 1 with one end open, a lid 2 covering the open end of the casing 1, and a filter element 3 mounted inside the casing 1. The filter element 3 consists of an annular filter member 4, an inner cylinder 5 disposed on the inner periphery of the filter member 4, and upper and lower end plates 6, 7 fixed to upper and lower annular end surfaces of the filter member 4. , a spring 8 for holding down the element is interposed between the upper end plate 6 and the closed end of the casing 1, and the lower end plate 7
An elastic seal 9 is provided between
By interposing the filter member 4 into the casing 1
and the lid 2, and at the same time, the inner and outer peripheral end surfaces of the filter member 4 are airtightly partitioned.

<<Problems to be solved by the invention>> In the oil filter with the above structure, the casing 1
After assembling the spring 8 and filter element 3 inside, the lid 2 is assembled to the opening surface of the casing 1, and the lid 2
The inner edge of the filter element 3 is fixed by a caulking member, and the biasing force of the spring 8 causes the filter element 3 to
easily pops out, making assembly work difficult. There is also a possibility that the filter element 3 may not be held in the correct position after assembly. A dead space is created between the spring 8 and the closed end of the casing 1, and the volumetric efficiency is also poor.

≪Means for solving the problem≫ In order to solve the above-mentioned problem, this invention arranges a filter element inside a cylindrical casing with one end open, and covers the open end of the cylindrical casing with a lid so that the filter element can be closed. In an oil filter whose both ends are clamped and fixed between a lid and a closed end surface of a cylindrical casing, the filter element includes an annular filtration member, an inner cylinder fixed to the inner periphery of the filtration member, and one end surface of the filtration member. It consists of a ring-shaped end plate attached to the
An annular recess constituting an end plate surface is formed at the closed end of the cylindrical casing, the other end annular end surface of the filtration member and the end surface of the inner cylinder are fitted and fixed into the annular recess, and one end of the filtration member is connected to the end plate and the lid. It is characterized in that an elastic seal is interposed between them, and the elastic seal elastically biases the other annular end surface of the filter member toward the annular recess.

≪Operation≫ During assembly, the filter element does not pop out due to the spring, making assembly work easier. Furthermore, the filter element is positioned in the annular recess, so that it can be assembled accurately. Since the upper end plate and spring can be eliminated, the number of parts can be reduced, and dead space can also be eliminated, making it possible to achieve smaller size and lighter weight.

<<Example>> FIG. 1 is a half-sectional side view of an oil filter according to this invention.

In the figure, this oil filter is roughly composed of a cylindrical casing 10 with one end open, a lid 12 that covers the open end of the casing 10, and a filter element 14 mounted inside the casing 10.

The filter element 14 includes an annular filter member 16
and an inner cylinder 18 disposed on the inner periphery of the filter member 16.
and a lower end plate 20 that is disposed on the annular surface of the lower end of the filter member 16 and supports the lower end of the filter member 16 together with the inner cylinder 18.

On the other hand, an annular recess 22 constituting an upper end plate is formed at the upper closed end of the casing 10, and the filter member 16 and the inner cylinder 1
8 is fitted.

The lid 12 has a mounting cylinder part 12a protruding from the center thereof, and a plurality of oil introduction holes 12b are formed around the mounting cylinder part 12a. The peripheral edge of the lid 12 is fixed by hemming a caulking plate 24 for attachment to the peripheral edge of the opening of the casing 10.

The inner peripheral portion of the lower end plate 20 is formed with a step portion 20a having a substantially L-shaped cross section.
An elastic seal 26 is interposed between the lower outer periphery of the cylindrical portion 12a and the base of the cylindrical portion 12a.
At the same time, the lower end of the filter element 14 and the lid 12 are sealed. Further, a tongue piece 2 constituting a one-way valve is provided at the periphery of the elastic seal 26.
6a is integrated and covers the oil introduction hole 12b.

Note that the reference numeral 28 in the figure is a seal ring attached to the inner circumferential end surface of the caulking plate 24.

<<Effects>> As explained above in the embodiments, in the oil filter according to this invention, compared to conventional oil filters, the filter element can be fixed in the casing without using a spring to press the element, Furthermore, since it is positioned in the annular recess, it is easy to assemble and can be assembled accurately. Furthermore, by eliminating the upper end plate and spring, the number of parts is reduced and at the same time, dead space is eliminated, making it possible to achieve a smaller size and lighter weight.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional side view of an oil filter according to this invention, and FIG. 2 is a half-sectional side view of a conventional oil filter. 10... Cylindrical casing, 12... Lid, 12a...
Cylinder part, 12b...oil introduction hole, 14...filter element, 16...filtering member, 18...inner cylinder, 20...
Lower end plate, 20a... Stepped portion, 22... Annular recess, 24... Caulked plate, 26... Elastic seal, 2
6a... tongue piece, 28... seal ring.

Claims (1)

[Scope of utility model registration request] In the oil filter, the filter element is disposed inside a cylindrical casing having one end open, and the open end of the cylindrical casing is covered with a lid, so that both ends of the filter element are clamped and fixed between the lid and the closed end surface of the cylindrical casing. The filter element consists of an annular filtration member, an inner cylinder fixed to the inner periphery of the filtration member, and a ring-shaped end plate attached to one end surface of the filtration member, and an end plate at the closed end of the cylindrical casing. forming an annular recess constituting a surface, fitting and fixing the other end annular end face of the filtering member and the end face of the inner cylinder into the annular recess, interposing an elastic seal between the end plate of the filtering member one end and the lid; An oil filter characterized in that the other end of the filter member is elastically biased toward the annular recess by an elastic seal.