JPH0629450Y2 - Filter support device for engine pressure-feed lubrication system - Google Patents

Description

[Detailed Description of the Invention] <Industrial application field> The present invention relates to a device for supporting a filter of a pumping type lubricating device for an engine, in which foreign matter mixed in lubricating oil flows from the filter paper inner space of the filter to various parts of the engine. (EN) Provided is one which prevents entry into a lubrication system and causes abnormal wear of a lubrication part and seizure of an engine, and facilitates fitting of a screw to easily attach a filter to a mounting screw cylinder.

<Prior Art> The basic structure of the filter support device of the pumping lubrication system for an engine, which is the subject of the present invention, is as shown in FIG. 1 or FIG. An inner oil passage hole 3, a mounting screw cylinder 4, an outer oil passage hole 5 and a sealing seat 6 are formed in this order from the central portion of the support portion 2 toward the outer peripheral portion, and the center of the base end wall 13 of the filter 1 is formed. From the portion toward the outer peripheral portion, a mounting screw hole 7, an outer flowing oil hole 8 and a sealing abutment 9 are formed in order.
The mounting screw hole 7 is tightly fitted to the mounting screw cylinder 4, the sealing abutment seat 9 is sealingly abutted on the sealing receiving seat 6, and the outer oil passage hole 5 and the inner oil passage hole 3 are outside. Oil flow hole 8, filter paper outer chamber 1
0, the filter paper 12 and the filter paper inner space 11 communicate with each other.

As a conventional technique of this type, for example, as shown in FIG. 2, the outer flow oil hole 8 of the base end wall 13 of the filter 1 is made to face the outer oil flow hole 5 of the filter support part 2 and the flow is concerned. A cylindrical mounting screw hole 7 is formed in the center of the base wall 13 having an oil hole 8 formed therein, and the mounting screw cylinder 4 is screw-fitted into the mounting screw hole 7, and one end of the mounting screw cylinder 4 is filtered. By letting the inner space 11 and the other end face the inner oil passage hole 3, the lubricating oil is filtered from the outer oil passage hole 3 through the outside of the mounting screw cylinder 4 and the outer oil flow hole 8 with the filter paper 12. However, there is one in which the space is supplied from the filter paper inner space 11 to the inner oil passage hole 3 through the inner wall of the mounting screw cylinder 4.

<Problems to be Solved by the Invention> In the above-mentioned conventional technique, the threaded portion 100 of the mounting screw hole 7 with the mounting screw cylinder 4 prevents the outer oil passage hole 5 from communicating with the so-called filter paper inner space 11. Although it is in the form of
Since the clearance between the screws is actually larger than the pore size of the filter paper 12 (for example, about 25 μm), foreign matter such as dust mixed in the lubricating oil passes from the outer oil passage hole 5 to the outer oil flow hole 8 and the filter paper outer side. Instead of passing through the chamber 10 and the filter paper 12, the threaded portion 100 and the filter paper inner space 11 are short-circuited.
There were not a few cases where it would invade.

In particular, the filter paper 12 having a large area does not have a large filtration resistance of the lubricating oil in the normal state, but when the clogging of the foreign matter progresses during the long-term use, the filtration resistance becomes large and the filter paper from the threaded portion 100 is filtered. The amount of lubricating oil that bypasses the inner space 11 increases more and more.

As a result, foreign matter is caught in various lubrication systems of the engine E, these lubrication parts are abnormally worn, or the foreign matter is clogged in the lubrication system, so that the lubricating oil does not flow smoothly and insufficient lubrication occurs. It will cause the engine to burn.

Further, in order to mount the filter 1 on the support portion 2, when the mounting screw hole 7 of the filter 1 is started to be screw-fitted to the mounting screw cylinder 4 of the support portion 2, with respect to the axis of the mounting screw cylinder 4. Aligning the axial center of the mounting screw hole 7 in a straight line depends on the feeling of the operator exclusively, and therefore, it often tilts with a slight deviation rather than in a straight line.

If this is slightly tilted, the screw hole 7 will be twisted into the mounting screw cylinder 4 and bite into it, and correct screw fitting will not be possible.
Often it takes time to redo many times before the screw fit can be properly made.

The problems of the present invention are (a) elimination of bypass of lubricating oil between the outer oil passage hole of the support part of the filter and the filter paper inner space of the filter, and (b) mounting screw of the support part of the filter. It is to be able to easily screw the mounting screw hole of the filter into the cylinder, and (c) to simplify the structure for achieving the above problems (a) and (b).

<Means for Solving Problems> Means for achieving the above-mentioned problems will be described below with reference to the drawings corresponding to the embodiments.

That is, in the filter supporting device of the pumping lubrication device for an engine having the above-described basic structure, the sealing cylinder 15 is provided so as to project from the tip portion 14 of the mounting screw cylinder 4, and the inner part 19 of the mounting screw hole 7 of the filter 1 is provided. An annular wall 16 for sealing is provided on the inner wall of the filter paper, and the annular wall 16 for sealing is externally fitted onto the cylinder 15 for sealing in a sealing manner via a gasket 17. Sealing annular wall 1
6, a dimension P that is blocked by the gasket 17 and the sealing cylinder 15, and the sealing cylinder 15 projects from the tip portion 14 of the mounting screw cylinder 4.
Is set to a value larger than the dimension S in which the annular ring wall 16 for sealing enters from the outer end portion 18 of the mounting screw hole 7 to the inner side.

<Function> Lubrication oil is outside oil passage hole 5 → outside oil flow hole 8 → filter paper outside chamber 10
→ Filter paper 12 → Filter paper inner space 11 → When flowing through the inner oil passage hole 3, the outer paper passage hole 5 and the outer oil flow hole 8 to the filter paper outer chamber 10
Even if it goes out of the passage leading to and penetrates into the gap of the screw fitting portion between the mounting screw hole 7 and the mounting screw cylinder 4,
Since the filter paper inner space 11 is completely closed from the screw fitting portion by the sealing annular wall 16, the sealing cylinder 15 and the gasket 17, the filter paper inner space is passed from the outer oil passage hole 5 through the gap of the screw fitting portion. Lubricating oil is prevented from leaking to 11 in a short circuit.

Conversely, even when the lubricating oil flows through the inner oil passage hole 3 → the filter paper inner space 11 → the filter paper 12 → the outer oil flow hole 8 → the outer oil flow hole 5,
The screw fitting part is the inner space 1 of the filter paper with the gasket 17 etc.
Since it is completely closed from the side of No. 1, the lubricating oil does not flow out in a short circuit from the filter paper inner space 11 to the outer oil passage hole 5 through the gap of the screw fitting portion.

Further, in order to mount the filter 1 on the support portion 2, when the mounting screw hole 7 of the filter 1 is started to be screw-fitted to the mounting screw cylinder 4 of the support portion 2, with respect to the axis of the mounting screw cylinder 4. Aligning the axis of the mounting screw hole 7 in a straight line is automatically performed as follows.

That is, when the filter 1 is picked up and the mounting screw hole 7 is inserted from the sealing cylinder 15, the sealing annular wall 16 is externally fitted to the sealing cylinder 15 via the gasket 17. Be decided. By this centering, when the mounting screw hole 7 contacts the tip portion 14 of the mounting screw cylinder 4, the axis of the mounting screw hole 7 is automatically aligned with the shaft center of the mounting screw cylinder 4 in a straight line.

Therefore, the screw hole 7 does not twist and bite into the screw cylinder 4, and the screw fitting is smoothly performed, so that the filter device 1 can be easily and efficiently attached to the support portion 2.

<Advantages of the Invention> (a) Prevention of lubricating oil bypass between the outer oil passage 5 and the filter paper inner space 11 Since the filter paper inner space and the screw fitting portion are reliably separated from each other by a gasket, etc. Oil hole → Filter →
When it flows to the inner oil passage hole, it does not leak from the outer oil passage hole to the inner space of the filter paper in a short circuit through the gap of the screw fitting part. Conversely, the inner oil passage hole → filter → outer oil passage hole Even if it flows through the holes, it does not flow out of the space inside the filter paper into the gap between the screw fitting parts, so foreign matter does not mix into the downstream side lubricating oil after filtering with the filter paper, and foreign matter is caught in the lubrication part of the engine. This will prevent the engine from seizing and causing abnormal wear, or causing the engine to seize due to clogging of foreign matter in the lubrication system.

(B) Easy attachment of the filter 1 When the filter 1 is picked up and the mounting screw hole 7 is inserted from the sealing cylinder 15, the sealing annular wall 16 is inserted through the gasket 17 into the sealing cylinder 15. On the other hand, it is decided by fitting outside.
By this centering, when the mounting screw hole 7 contacts the tip portion 14 of the mounting screw cylinder 4, the axis of the mounting screw hole 7 is automatically aligned with the shaft center of the mounting screw cylinder 4 in a straight line.

Therefore, the screw hole 7 does not twist and bite into the screw cylinder 4, and the screw fitting is smoothly performed, so that the filter device 1 can be easily and efficiently attached to the support portion 2.

(C) A structure for achieving the above effects (a) and (b) is simple. A structure and an effect for achieving the above effect "(a) Prevention of lubricating oil bypass between the outer oil passage 5 and the filter paper inner space 11". What is the structure for "easy installation of (b) filter device 1"?
The sealing annular wall 16 has the gasket 17 and the sealing cylinder 1
The structure is simple because it is also used as a single structure that is externally fitted to 5.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic explanatory view of a lubricating system of an engine. A lubricating system R of a vertical overhead valve type diesel engine E includes a strainer 21, a lubricating pump 22, a filter 1 and various lubricating parts 23.
Are connected by a lubricating oil passage 20.

An oil pan 24 is formed below the crankcase 25 of the vertical diesel engine E, the strainer 21 is arranged on the oil pan 24, and the strainer 21 fixed to the side wall of the crankcase 25 is a lubricating pump. 22
The lubricating oil stored in the oil pan 24 is filtered by the lubricating pump 22 by the filter 1, and then the crankshaft,
It is supplied to various lubricating parts 23 of the engine such as the fuel injection cam shaft, the valve operating cam shaft and the rocker arm shaft.

The filter 1 is removably attached to the filter support portion 2 on the side wall of the crankcase via a mounting screw cylinder 4.

The filter 1 has a doughnut-shaped filter paper 12 housed in a cup-shaped filter cover 30, and the opening surface of the cover 30 is sealed by a plate-shaped base end wall 13. A filter paper outer chamber 8 is formed, and a filter paper inner space 11 is formed in the inner peripheral portion thereof.

A cylindrical mounting screw hole 7 is formed in the central portion of the base wall 13 so as to project inward, and an annular outer oil flow hole 8 is formed in the outer peripheral portion of the mounting screw hole 7. An annular sealing seat 9 is attached so as to contact the outer wall of the base wall 13.

The central opening of the doughnut-shaped filter paper 12 is closed by a sealing annular wall 16, and this is arranged at a position deeper than the mounting screw hole 7 at the center of the base end wall 13, and the sealing annular wall 16 is closed. Thus, the filter paper inner space 11 is partitioned from the outside.

An opening 50 is formed in the central portion of the sealing annular wall 16, and the inner diameter of the opening 50 is set to be substantially equal to the outer diameter of the sealing cylinder 15 at the tip of the mounting screw cylinder 4, which will be described later. Barrel 1
5 is configured to be fitted into the opening 50.

Also, a ring-shaped gasket 17 is arranged along the opening 50 of the sealing annular wall 16 and is pressed by the pressing plate 51,
After fixing, the gasket 17 is expanded in the inner diameter direction.

On the other hand, an inner oil passage hole 3 is formed in the center of the filter support portion 2, and a female screw 31 is cut near the tip of the inner wall of the inner oil passage hole 3,
An annular outer oil passage hole 5 is formed on the outer peripheral portion thereof, a front end surface 32 of a partition wall between the inner oil passage hole 3 and the outer oil passage hole 5 is formed into a smooth surface, and the outer oil passage hole 5 is provided with a lubricating oil passage. The lubrication pump 22 is connected by 23, and the inner oil passage 3 is connected by various lubrication parts 23.

A smooth end wall surface of the filter support portion 2 outside the outer oil passage hole 5 is configured as a sealing seat 6, and the tip end surface 32 is stepped back from the sealing seat 6. Let it go.

A collar portion 33 is formed at the center of the mounting screw cylinder 4, male screws 34 and 35 are cut at both ends thereof, and the male screw 35 is screwed into the female screw 31 of the inner oil passage hole 3 to form one side of the collar portion 33. The end surfaces of the oil passage holes 3 and 5 are brought into contact with the tip surfaces 32 of the partition walls to fix the mounting screw cylinder 4 to the filter support portion 2.

The sealing cylinder 15 is integrally projected from the male screw 34 on the protruding end side of the mounting screw cylinder 4, and the sealing annular wall 16 mounts the dimension P where the sealing cylinder 15 projects from the mounting screw cylinder 4. The dimension S is set to be larger than the dimension S that is entered from the outer end portion 18 of the screw hole 7 to the inner side.

Then, the sealing cylinder 15 is attached to the gasket 17 that bulges inward.
While fitting in the male screw 34, the male screw 34 is attached to the mounting screw hole 7 of the filter 1.
The filter cylinder 15 of the mounting screw cylinder 4 is communicated with the inner oil passage hole 3 and the other end side thereof is communicated with the filter paper inner space 11 of the filter container 1. 1 is fixed to the filter supporter 2 via the mounting screw cylinder 4.

In this case, the protruding dimension P of the sealing cylinder 15 is set to be larger than the depth dimension S of the outer end portion 18 of the mounting screw hole 7 with respect to the annular sealing wall 16, so that the tip of the sealing cylinder 15 is first. After contacting the gasket 17, the tip portion 14 of the mounting screw cylinder 4 is screwed into the mounting screw hole 7.

Therefore, when the filter 1 is screwed into the mounting screw cylinder 4, the gasket 17 is fitted to the sealing cylinder 15, and the outer end 18 of the mounting screw hole 7 is fitted to the tip 14 of the mounting screw hole 7. Since the filter 1 is brought into contact with and stably oriented in the axial direction of the mounting screw cylinder 4, it is screw-fitted to the mounting screw cylinder 4, so that the filter 1 is smoothly twisted without being twisted.
Can be screwed into.

As a result, the filter 1 can be properly fixed to the filter support portion 2, and the sealing cylinder 15 of the mounting screw cylinder 4 is inserted into the opening 50 of the sealing annular wall 16 of the filter to insert the filter paper inner space. 11, the gasket 17 fixed in the opening 50 is pressed against the outer wall of the sealing cylinder 15 to seal the filter paper inner space 11 from the screw fitting portion between the mounting screw cylinder 4 and the mounting screw hole 7. .

Further, the sealing abutment 9 of the filter 1 is pressed against the sealing seat 6 of the filter support part 2 to prevent the lubricating oil from leaking out from the connection part between the filter 1 and its support part 2. To be done.

Further, the outer oil passage 5 of the support portion 2 is communicated with the outer oil flow hole 8 of the filter 1, so that the lubricating oil from the oil pan 24 is smoothly supplied to the filter 1.

Therefore, the flow of the lubricating oil will be described below.
The lubricating oil stored in No. 4 is first supplied from the strainer 21 to the outer oil passage hole 5 of the filter supporter 2 by the lubricating pump 22.

The lubricating oil that has entered the oil passage hole 5 passes through the filter paper outer chamber 10 from the outer flow oil hole 8 and the filter paper 12 to remove foreign matter such as dust that has been mixed inside due to this filtration, and to be cleaned. To be done.

In this case, even if the lubricating oil leaks to the sealing annular wall 16 from the gap of the screw fitting portion, as described above, the gasket 17, the sealing annular wall 16 and the sealing cylinder are provided. Since it does not enter the inside of the filter paper inner space 11 by being blocked by 15 and the foreign matter mixed in the lubricating oil,
It is prevented that the screw fitting portion is bypassed from the outer oil passage hole 5 and flows into the filter paper inner space 11.

After that, the lubricating oil that has passed from the filter paper inner space 11 through the inner passage of the mounting screw cylinder 4 to the inner oil passage hole 3 passes through the lubricating oil passage 20 and various lubricating portions 23 of the engine E (for example, a crankshaft and a fuel injection). It is supplied to a cam shaft or the like) to smoothly lubricate the relevant part.

As described above, according to the present invention, in the filter support device of the pumping type lubricating device for the engine, the sealing annular wall 16 attached to the filter 1 is provided on the mounting screw cylinder 4 through the gasket 17 so as to project. The engine E is not limited to the diesel engine of the above-described embodiment, but the gasoline engine is not limited to the diesel engine of the above-described embodiment, because the projection size of the sealing cylinder 15 is set to a predetermined condition by externally fitting the sealing cylinder 15. Alternatively, it may be applied to a gas engine.

The circulation mode of the lubricating oil with respect to the filter 1 may be, for example, the reverse of the above-described embodiment, and the lubricating oil from the oil pan 24 is passed from the inner oil passage hole 3 of the filter support portion 2 to the filter paper of the filter 1. After passing through the inner space 11 and filtering foreign matters with the filter paper 12, the foreign matters are supplied from the outer oil passage 5 of the support portion 2 to the various lubrication parts 23 of the engine through the filter paper outer chamber 10 and the outer oil flow hole 8, and the respective parts concerned. There is no problem even if lubrication is performed.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a pumping type lubricating device for an engine showing an embodiment of the present invention, and FIG. 2 is a schematic explanatory diagram of a main part of a pumping type lubricating device showing a conventional technique. DESCRIPTION OF SYMBOLS 1 ... Filter, 2 ... 1 support part, 3 ... Inside oil passage hole, 4 ... Mounting screw cylinder, 5 ... Outside oil passage hole, 6 ... Sealing seat, 7 ... Mounting screw hole, 8 ... Outer flow Oil hole, 9 ... Sealing seat, 10 ... Filter paper outer chamber, 11 ... Filter paper inner space, 12 ... Filter paper, 13 ... 1 proximal end wall, 14 ... 4 tip end portion, 15 ... Sealing cylinder, 16 ... annular wall for sealing, 17 ... gasket, 18 ... outer end portion of 7, 1
9 ... 7 depth, E ... engine, P ... 15 protruding dimension from 4, S ... 16 depth dimension from 18.

Claims (1)

[Scope of utility model registration request] 1. An inner oil passage hole (3) and a mounting screw cylinder (4) in this order from the central portion of the support portion (2) of a filter (1) of a pressure-feed type lubricating device for an engine (E) toward the outer peripheral portion. , Outer oil passage hole (5) and sealing seat
(6) are formed, and the mounting screw hole (7), the outer flow oil hole (8) and the sealing contact (in the order from the center to the outer periphery of the base end wall (13) of the filter (1) ( 9)
Then, the mounting screw hole (7) is tightly fitted into the mounting screw cylinder (4) to seal the sealing contact seat (9) to the sealing seat (6), and An engine constructed by communicating the oil hole (5) with the inner oil passage hole (3) through the outer oil flow hole (8), the filter paper outer chamber (10), the filter paper (12) and the filter paper inner space (11). In the filter support device of the pressure-feed type lubricator, the sealing cylinder (15) is projected from the tip (14) of the mounting screw cylinder (4), and the mounting screw hole (7) of the filter (1) is Ring wall for sealing in the back (19)
(16) is provided, the sealing annular wall (16) is externally fitted to the sealing cylinder (15) through the gasket (17) in a sealing manner, and the mounting screw hole (7)
The space between the filter paper inner space (11) and the inner space (11) of the filter paper is cut off by the sealing annular wall (16), the gasket (17) and the sealing cylinder (15), and the sealing cylinder (15) is the mounting screw cylinder (4). The dimension (P) protruding from the tip (14) of the is larger than the dimension (S) that the sealing annular wall (16) enters from the outer end (18) of the mounting screw hole (7) to the inner side. A filter support device for an engine pressure-feed lubrication device, which is set to a value.