JPS646884Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubrication device used for example in a lubrication device for a diesel engine.

Conventionally, as this type of filtering device, the special public
There is one described in Publication No. 33871.

This conventional device has a structure in which a container housing two over-elements is attached to a hollow mounting bolt of a mounting base, but the problem is that the structure on the outlet side of the two over-elements is complicated. There is.

The present invention aims to solve the above-mentioned problems, and the present invention will be explained in detail below with reference to specific examples. In Fig. 1, reference numeral 1 denotes a spin-on type lubricating oil filter device for diesel engines according to the present invention, which includes a case 2, a reinforcing plate 3 with mounting screws 4, a full flow filter element 8, a bypass filter element 9, and a ring-shaped gasket. 10 etc., a metal shroud 5 for holding the ring-shaped gasket 6 and sealing it with the case 2, a rubber check valve 11 for sealing and preventing backflow of the gasket 7, and a check valve 11. It is composed of a presser spring 12 and an element presser spring 14.

A bypass oil passage 20 is formed between the end plates 18 and 19 of the filter element 7. Also,
The end plates 18 and 19 are provided with a plurality of ribs that ensure passages 20. FIG. 2 is a cross-sectional view of the over-element 7, and FIG. 3 is a plan view including a partial cross-section of the over-element 7. 21 is the filter 1
A hollow union bolt for attaching to the bracket 31, which includes a full flow passage 22 located on the innermost side and a bypass passage 2 located on the outside thereof.
3, 24, and 25 are provided. In particular, in FIG. 4, the diameter of the passage 25 is made small so that it functions as a flow rate restriction hole. 26 is a mounting screw for mounting the filter 1, 27 is a mounting screw for mounting the union bolt 21 to the bracket 31, and 28 is a mounting screw for mounting the union bolt 21 to the bracket 31 and at the same time connecting the inlet passage 34 of the bracket 31 to the bypass outlet passage 35. The flange 29 that seals between the gaskets is a gasket sealing surface. A stopper 30 is used to form the bypass passage 24 and then seal it by driving, screwing, gluing, or the like. The bracket 31 is provided with a bypass passage 36, a full flow outlet 32, and a bypass outlet 33.

The operation of the filter having the above configuration will be explained.
Oil sent from an oil pump (not shown) enters the inlet 34 of the bracket 31, opens the check valve 11 from the inlet 13 of the filter 7, enters the filter 1, passes through the outer circumferential path 16 of the filter element 7, and passes through the filter 7. Part of the oil enters from the inlet 17 of the full-flow filter element 8 and flows through the filter element 8.
The contaminant passes through the coarse contaminant, passes through the full-flow passage 22 of the union bolt 21, and is sent from the full-flow outlet 32 of the bracket 31 to the engine lubricating section (not shown). On the other hand, some of the oil that has entered the filter 1 is transferred to the bypass element 9.
It enters from above and slowly flows downward inside the filter element 9, passing even fine particles such as carbon generated during combustion and mixed in the lubricating oil.
The evaporated oil passes through the passage 20 between the element end plates 18 and 19, through the bypass passages 23, 24, 25 of the union bolt 21, through the passages 35, 36 of the bracket, and from the bypass outlet 33 to the oil pan ( (not shown). Here, the space between the inlet 35 of the bracket and the bypass oil passage 20 is sealed by a filter mounting screw 4, and the passage 20 and the overflow side of the full flow are sealed with a gasket 10, so that they are not short-circuited. It never happens. Since the bypass passage 25 of the union bolt 21 is used as a flow rate restriction hole, the bypass flow rate does not increase to cause excessive performance deterioration and a flow rate shortage on the full flow side. Since the flow rate restriction hole 25 is provided in the union bolt 21, precision machining is easy.

Overflow element 8 for full flow of element 7
is generally overproduced, but it is also possible to use cotton lint or the like. On the other hand, the bypass element 9 is made by rolling and packing linter pulp paper and capturing fine particles by utilizing the adsorption power of the fiber surface of the linter pulp. It is also possible to use packs of isosorptive fibers. A metal ring plate is placed between the elements 8 and 9 so that they do not communicate with each other, and the inlet 17 is provided in the metal ring plate.

Next, other embodiments will be described.

In FIG. 6, the check valve 11 in FIG. 1 also has the function of a presser spring 12.

FIG. 7 shows the check valve 11 and gasket 10 shown in FIG. 1 integrally molded with rubber parts. In other words, in Figure 1, gasket 10
The gasket sealing surfaces of the union bolt 21 and the gasket sealing surface of the union bolt 21 are provided concentrically to provide a circumferential seal, but in FIG. 7, the sealing is performed at the end surface 21a of the union bolt 21.

Union bolt 21 attached to bracket 31
When installing filter 1 to
The end face 21a of the element 7 contacts the check valve 11, and when the element 7 is further tightened, the element 7 is pushed up, tightening the element presser spring 14, and a load is applied to the sealing surface 21a to obtain sealing force.
The oil passed through the bypass element 9 is passed through the bypass passage 20 and the passage 1 of the check valve 11.
1', the passage 24 of the union bolt 21, the flow restriction hole 25, and the outlet 36 to the oil pan.

Although the above embodiment describes an example in which the invention is applied to an oil leakage device for a diesel engine, the present invention can also be applied to a gasoline engine or a hydraulic device of general industrial machinery, and even if the fluid is other than oil. Of course, it can also be applied.

Further, in the above embodiment, the diameter of the bypass passage 36 of the bracket 31 may be reduced so as to serve as a flow rate restriction hole. Furthermore, in order to improve the sealing performance between the union bolt 21 and the bracket 31, a ring-shaped gasket may of course be sandwiched between the contact surface between the flange 28 of the bolt 21 and the bracket 31.

In summary, the present invention simplifies the structure because the outlet passages for the two over-elements of the over-container are formed in the hollow mounting bolt of the mounting base to which the over-container is screwed and fixed.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway cross-sectional view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 3, showing the over-element portion of Fig. 1; 4 is a sectional view showing the union bolt of FIG. 1, FIG. 5 is a sectional view taken along line B-B of FIG. 4, and FIGS. 6 and 7 show other embodiments of the present invention. FIG. 8, 9... Passage element, 6, 10... Gasket, 21... Union bolt forming the mounting bolt, 22, 23, 24, 25... Passage, 31...
A bracket that forms the mounting base.

Claims (1)

[Scope of Claim for Utility Model Registration] A mounting screw for an overheater equipped with an overflow element inside is screwed into a hollow mounting bolt provided on a mounting base and has a fluid passage inside, and the overflow element is fixed therein. In the over device having a structure in which a gasket seals between the device and the mounting base, the over element has a two ring-shaped structure, and a second over element is arranged outside the first over element, An outlet side of the first over-element on the inside communicates with the fluid passage of the mounting bolt, and an outlet side of the second over-element on the outside communicates with another fluid passage provided in the mounting bolt, A filter device in which the outlet sides of both of the elements are sealed by a gasket that is placed under pressure on the outer surface of the mounting bolt.