JPH0141455Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention generally relates to an oil filtration device, and particularly relates to an oil purification filter.

The filter of the present invention can be applied to internal combustion engines for automobiles, tractors, and aircraft.

[Conventional technology]

Known assembly-type oil purification filter (see inventor's Soviet inventor's certificate No. 274945, C1.F01m1/10)
includes a housing connected to the cover plate by a central tie bolt and housing the filter element. In this filter construction, the loads applied by the tie bolts are transferred to the housing.

The filter housing is therefore subject to considerable loads imposed by the tie bolts and must have a considerable wall thickness in order to be stable and reliable. Also, the provision of tie bolts precludes housing the drain prevention valve and the bypass valve inside the filter. Further disadvantages include the complicated passage and drainage of oil through special conduits and passageways.

Also known disposable oil purification filters for use in internal combustion engines include a housing and a cover plate connected by a wrap. The housing of this filter accommodates a spring-loaded filter element with a drain prevention valve and a bypass valve (see "VAZ Car Parts Catalog" published by Moscow, Machinostroenie, Publishers).

[Problem that the invention attempts to solve]

Such filters are small and easily replaceable. The walls of the filter housing are thin, approximately 0.5 mm, and are usually manufactured by stamping.
However, these filters cannot be reused and must be replaced after 10,000 km. This is because the filter element has by then become obsolete, although other parts of the filter and its housing are not worn out and can still be used. This results in a loss of several thousand tons of sheet metal each year.

The present invention provides an oil purification filter in which the cover plate is connected to the filter housing and the filter parts and units are arranged for repeated use, easy manufacture, reliability and easy assembly and repair. The purpose is to

[Means and actions for solving problems]

It is an object of the invention to provide an oil purification filter comprising a housing connected to a cover plate having an oil inlet hole, the housing housing a filter element having a bypass valve, a coil spring and a drain prevention valve. According to the locking device, the housing has a disc-shaped flange provided in the housing and provided with a central threaded hole and a hole through which oil flows, which receives a mounting element connected to the cover plate. The flange wall and the housing wall connected to the cover plate and facing each other have bearing surfaces, between which a split spring ring is provided and fixed in place to ensure locking of the flange within the housing. and a filter element with a bypass valve and a coil spring is mounted on the flange on the side of the convex surface facing the bottom of the housing, while a drain prevention valve is mounted between the inner surface of the cover plate and the convex surface of the flange. This is accomplished by an oil purifying filter mounted on the mounting element so as to occupy a limited space, the mounting element being hollow and having threads on its inner surface for draining the oil through its interior. Ru. This removable connection of the cover plate to the housing allows the filter to be reused by periodically replacing the filter element and sealing O-ring. The arrangement of the parts and elements in the filter ensures its ease of assembly, repair, and reliable operation.

〔Example〕

Specific embodiments of the invention will be described in detail below with reference to the drawings.

Referring to FIG. 1, the oil filter according to the present invention comprises a housing 1 to which a cover plate 2 is attached by a locking device, the locking device comprising:
A removable disc-shaped flange 3 having a central screw hole and a hole 4 through which oil flows, and a wall of the housing 1 and the flange 3 facing each other,
Support surfaces 5, 6, in which a split spring ring 9 is arranged and fixed between these walls, locking the removable flange 3 at its upper end inside the housing 1;
7, 8 (Fig. 2) and mounting element 10 (Fig. 1)
It is equipped with The concave surface of the removable flange 3 facing the bottom of the housing 1 has a projection 11 into which a filter element 12 with a bypass valve 13 and a coil spring 14 is fitted. The bearing surfaces 5, 6, 7, 8 in the walls of the housing 1 and the removable flange 3 can have the form of recesses, grooves, projections and shoulders. For a more reliable filtration effect, the support surfaces 5 and 6 are preferably provided in the thicker parts of the housing 1. a space 15 defined by the inner surface of the cover plate 2 and the concave surface of the removable flange 3;
In this case, a drain prevention valve 16 is fixed to the mounting element 10 so as to close an oil inlet hole 17 made in the cover plate 2. The mounting element 10 is hollow for oil to flow therethrough and is threaded on its inner surface for mounting the filter to the engine block. The cover plate 2 is provided with sealing O-rings 18 and 19 on the inside and outside to ensure a sealing engagement of the cover plate 2 to the housing 1 and of the filter to the engine block. a removable disc-shaped flange 3 with a concave surface facing the engagement point of the attachment element 10;
can withstand considerable loads and thus makes it possible to provide holes 4 and projections 11 through which oil can pass.

The split spring ring 9 can have a circular or rectangular cross-section and can also be a combination of arcs and flat surfaces with or without a reduced tip. The provision of a removable flange 3 can ensure reliable operation of the filter element 12, the bypass valve 13 and the drain prevention valve 16.

The filter according to the present invention is assembled as follows. A filter element 12 with a bypass valve 13 and a spring 14 is mounted on the projection 11 of the removable flange 3, the flange 3 being received inside the housing 1 and the spring 14 being pressed towards the bottom of the housing 1. Then, when the removable flange 3 is retracted into the interior of the housing 1, the split spring ring 9 is placed on the support surfaces 5, 6 of the housing 1 and under the action of the coil spring 14 the support surface 7 of the removable flange 3 is placed. , 8 is fixed in place. This flange 3 is locked at its upper end inside the housing 1. Drain prevention valve 16 and O-
The cover plate 2 with rings 18, 19 is fixed to the housing 1 by a mounting element 10 passing through a central threaded hole in the flange 3.

(Function) The oil purification filter according to the present invention functions as follows.

Oil supplied by the engine's oil pump passes through the hole 17 in the cover plate 2, pushes the drain prevention valve 16, and flows into the space 15. The oil then tries to enter the space between the inner wall of the housing 1 and the outer surface of the filter element 12 through the hole 4 of the removable flange 3. After passing through the filter element 12, the oil is purified and discharged from the filter through a hollow fitting element 10 in the main oil pipe of the engine. When the engine is cold or when the filter element 12 is clogged with impurities, the bypass valve 13
acts to supply unpurified oil to the engine's main oil line.

After the cover plate 2 has been attached to the housing 1, the force exerted by the attachment element 10 through the removable flange 3, the split spring ring 9 and the support surface 5 of the housing 1 causes the end face of the housing 1 to be attached to the cover plate. This acts to press against the sealed O-ring 18 to ensure a pressure seal on the filter. Despite its magnitude, the clamping force of the mounting device 10 is not transmitted to the walls of the housing 1, but is instead absorbed by the supporting surfaces 5, 6 of the walls of the housing 1.

[Effect of idea]

The filter of the present invention is suitable for repeated use by periodic replacement of filter element 12, anti-drain valve 16, and seals 18,19. The main advantage of the oil filter of the invention is that the housing 1 and the cover plate 2 are connected in such a way that the walls of the housing 1 are free from the forces exerted by the mounting element 10 and are only subjected to oil pressure. It is to be done. This allows the use of thin-walled press-molded housings of the same thickness as those used in disposable, one-piece filter constructions, while the arrangement of components and units allows the filters of the present invention to be easily assembled. and its operation can be made reliable as well as easy to repair.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of the assembled oil purifying filter according to the present invention, and FIG. 2 is an enlarged view of the element locking the removable flange. 1...Housing, 2...Cover plate, 3
... Removable disc-shaped flange, 4 ... Oil circulation hole, 5, 6, 7, 8 ... Support surface, 9 ... Split spring ring, 10 ... Mounting element, 11 ... Projection of flange , 12... Filter element, 13... Side passage valve, 14... Coil spring, 15... Space, 16
...Drain prevention valve, 17...Oil inflow hole, 1
8,19...O-ring for sealing.

Claims (1)

[Scope of utility model registration request] An oil purification filter comprising a housing 1 connected to a cover plate 2 having an oil inlet hole 17, the housing accommodating a filter element 12 having a bypass valve 13, a coil spring 14 and a drain prevention valve 16, The housing 1 is provided within the housing 1 and includes a cover plate 2.
By means of a locking device comprising a removable disc-shaped flange 3 provided with a central threaded hole for receiving a mounting element 10 connected to the holder and a hole 4 through which oil flows.
The walls of the flange 3 and the walls of the housing 1, connected to the cover plate 2 and facing each other, have support surfaces 5, 6, 7, 8, between which a split spring ring 9 is provided and fixed in position. To ensure the locking of the flange 3 in the housing 1, a filter element 12 with a bypass valve 13 and a coil spring 14 is mounted on the flange 3 on the side of the convex side facing the bottom of the housing 1, while preventing condensation. A valve 16 is mounted on the mounting element 10 in such a way that it occupies a space defined by the inner surface of the cover plate 2 and the concave surface of the flange 3, said mounting element 10 being hollow for draining oil through its interior. An oil purification filter characterized in that the filter is equipped with a screw on its inner surface.