JPS6145285Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an oil filter with a bypass filter used in an internal combustion engine.

For dual type oil filters,
A full flow passage and a bypass passage are provided in the filter casing, and after the lubricating oil that flows into the filter is filtered by each filter, most of it flows from the center to the full flow passage for engine lubrication, while a small amount The lubricating oil is circulated from its periphery to the oil reservoir via a bypass flow path.

The structure of the oil filter to realize such a structure consists of a filter body housing each of the above-mentioned filter elements, an inlet port to which the filter body is removably attached and which supplies lubricating oil to the filter body. and full flow side,
This is done by assembling with a mounting base that has bypass side outlet ports respectively formed therein.

In order to unite the mounting base with the filter body in this way, the conventional mounting base must be formed with a double flow path, a full flow path introduced from the filter body and a bypass flow path. For this purpose, a double cylindrical pipe is provided in the center of the filter to connect the filter in an oil-tight manner, the inner cylinder part of which is connected to the full flow passage, and the outer cylinder and the inner cylinder are connected to the bypass passage. However, this method requires a large number of parts and must be arranged with a predetermined gap between the inner and outer cylinders, making assembly unstable and requiring a complicated structure. It was hot.

This invention was developed in view of the above-mentioned drawbacks of the conventional oil filter, and provides an oil filter that can separate bypass and full-flow passages from the filter body without relying on the double pipe line as described above. It is something to do.

In order to achieve the above object, the present invention provides a bypass flow path between the threaded part of the base plate on the side of the filter body and the cylindrical attachment part that also serves as a conduit for attaching the filter body and configuring the full flow flow path. An embodiment of this invention will be described in detail below with reference to the drawings.

In the figure, 10 is the oil filter body, 12
is a mounting base on which the main body 10 is detachably mounted.

The main body 10 includes a cylindrical casing 14 with an open bottom, a filter assembly 16 housed in the casing, a base plate 18 that covers the bottom of the casing 14, and supports the bottom of the base plate 18 and supports the periphery of the filter assembly 16. A fixing plate 20 is caulked and fixed to the outer peripheral edge of the lower surface of the casing and also serves as a packing mechanism between the main body 10 and the mounting base 12, and is inserted on the upper inner surface of the casing 14 and the base plate 18. A coil spring 22 and a four-shaped plate spring 24 are provided to hold the casing 16 in a clamped state.

The base plate 18 has a cylindrical upright portion 26 formed at its center to be screwed into a cylindrical mounting portion to be described later, and openings 28 for introducing lubricating oil are formed at appropriate intervals on the periphery.

The assembly 16 also includes a lower end plate 30 whose center fits into the upright portion 26 of the base plate 18, and an upper end plate 32.
and a cylindrical full flow element 3 composed of a relatively rough overpass member sandwiched between both plates.
4, a cylindrical bypass element 36 composed of a relatively dense overpass member disposed in the inner cylinder part of the full flow element 34, and each element, which is integrally vertically disposed from the center of the upper end plate 30. An axial tube 38 is provided which defines a space between 34 and 36, and an inner cylindrical portion of this axial tube 38 communicates with an inner cylindrical portion of the full flow element 34.

For the main body 10 configured as described above, the mounting base 12 includes a base block 40 and a cylindrical mounting portion projecting perpendicularly to a mounting surface 42 for the main body 10 formed obliquely on the upper part of the base block 40. It consists of 44.

The block 40 has an inlet port 46, a space 48 which communicates with the inlet port 46 at one end and is carved concentrically with the center of the mounting surface 42, and is formed parallel to the lower side of the block 40. An outlet port 50 for full flow and an outlet port 52 for bypass are bored in the block 40 perpendicularly to the outlet port 50, and their upper ends are diagonally intersected with the inner cylinder part of the cylindrical mounting part 44. a full-flow communication channel 54 that communicates with this, and a bypass communication passage that is perpendicularly intersecting with the bypass outlet port 52 and has the other end in contact with the outer periphery of the cylindrical mounting portion 44. A flow path 56 is formed.

Further, the cylindrical mounting portion 44 is attached to the block 40.
A small-diameter male threaded portion 58 is formed on top of the small-diameter male threaded portion 58, and a large-diameter male threaded portion 62 is formed on the inner periphery of the upright portion 28 of the base plate 18 through a packing 60. As a result, the main body 10 can be positioned on the mounting base 12, and can be attached to and detached from the mounting base 12 by simply turning it, and the shaft tube 38 can be oil-tightly fitted to the tip of the main body 10 via the O-ring 64. There is.

As shown in FIG. 2, at the location where the male threaded portion 62 is formed, a plurality of keyway-shaped communication grooves 66 are provided at appropriate intervals along the axial direction on its outer periphery, and the mounting portion A plurality of voids are formed between the joint surfaces of 44 and the upright portion 26, and these voids are communicated with a communication channel 56 for bypass.

Therefore, lubricating oil supplied from an oil reservoir (not shown) via an oil pump or the like flows from the inlet port 46 to the gap 48 to the opening 28 of the base plate 18.
Most of the water passes through the full flow element 34 and reaches the shaft pipe 38 → cylindrical fitting 44 → communication channel 54 → outlet port 50 as shown by the arrow. , used for lubrication of various parts.

In addition, a portion of the lubricating oil that has passed through the full-flow element 34 is further filtered through the bypass element 36, as indicated by the dotted arrow, and passes through the gap (communication groove 66) formed between the outer periphery of the mounting portion 44 and the upright portion 26 to reach the bypass communication flow passage 56 and the outlet port 52, from where it is circulated again to the oil reservoir.

As explained in the embodiments above, in this oil filter, the above-mentioned configuration allows the bypass and full flow passages to be distributed without relying on the conventional double pipe line. It has advantages such as reduced number of points, simple structure, and easy assembly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an oil filter according to this invention, and FIG. 2 is a sectional view taken along the line -- in FIG. 10... Oil filter body, 12... Mounting base, 14... Casing, 16... Filter assembly, 18... Base plate, 20... Fixed plate, 22... Coil spring, 24... Leaf spring, 26
... Standing part, 28 ... Opening, 30 ... Lower end plate, 32 ... Upper end plate, 34 ...
... Full flow element, 36 ... Bypass element, 38 ... Shaft pipe, 40 ... Base block, 42 ... Mounting surface, 44 ... Cylindrical mounting part, 46
...Inlet port, 48...Air gap, 50...Outlet port for full flow, 52...Exit port for bypass, 54...Connection channel, 56...Connection channel, 58
...Male thread part, 60...Packing, 62...Male thread part, 64...O-ring, 66...Communication groove.

Claims (1)

[Scope of utility model registration request] A casing with an open bottom, a base plate that covers the bottom opening of the casing, a double cylindrical full flow element and a bypass element housed in the casing, and the center thereof communicates only with the full flow element side. An oil filter is provided with an oil filter body having an axial tube vertically arranged to define a flow path, and a mounting base on which the filter body is removably attached. An inlet port, a full flow side outlet port, and a bypass side outlet port are formed to communicate with each other, and one end of the inner cylindrical part passes through the center of the mounting base to communicate with the full flow side outlet port, and the other end is connected to the mounting base. protrudingly providing a cylindrical mounting portion whose outer periphery of the protruding end is screwed into a female threaded portion formed at the center of the base plate of the filter body, and fitting the tip of the cylindrical mounting portion into the shaft tube in an oil-tight manner; Furthermore, a gap is formed between the outer periphery of the cylindrical attachment part and the base plate, and communicates with the inner periphery of the bypass element, and this gap is connected to the outlet port on the bypass side. oil filter.