JPH10202016A - Cartridge liquid filter for engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cartridge liquid filter, in which the looseness of a cover fitting part and the play of a filter element are eliminated and the case body is prevented from being damaged. SOLUTION: A cylindrical filter element 13 is housed in a cup-shaped case body 11 opened at one end thereof and is elastically supported by a spring member 14. In the open end part, a thick cover 12 is arranged which is provided with a screwed cylindrical part 12a in the center thereof and also has plural through-holes 12b in its circumference and has arc-shaped outer peripheral upper and lower edged 12c1 and 12c2 on its periphery. The lower edge 12c2 of a standing wall 12c is hung from a constricted part 11c of the case body 11, and open end edge parts 11d of a peripheral wall 11a of the case body 11 are wound are tightened one on top of the other and are press-fixed on the end surface of the erected wall 12c of the cover 12, and by spring back action of winding and tightening thereof, the cover 12 and the filter element 13 are restricted to eliminate the play and also the case body 11 in contact with the upper edge 12c1 from being damaged in the shape of an arc of the erected wall 12c by the upper edge 12c1 .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a disposable cartridge type liquid filter used for a lubrication system and a fuel system of an engine such as an automobile, a construction machine, and a power generation facility.

[0002]

2. Description of the Related Art As a disposable cartridge type liquid filter which has been widely used for an engine lubrication system or a fuel system of the above-mentioned apparatus, a cover body for closing an open end of a cup-shaped case body has been used. It is formed as a stack of a thick sheet plate and a thin cover plate,
The peripheral edge of the thin cover plate and the peripheral edge of the open end of the case body are entangled and crimped, which requires not only a large number of parts but also welding work between the sheet plate and the cover plate, Due to problems such as deterioration, a thin cover plate has recently been omitted and the peripheral edge of the open end of the case body is directly caulked to a sheet plate (cover body).

FIG. 10 schematically shows the filter F, which is made of a thin iron plate (thickness: 0.3 mm to 0.5 mm) and has one end (upper end in the figure) opened to form a cup, and the peripheral wall 1a is opened. A semicircular constriction 1c at the end for stopping the cover
A porous inner cylinder 36 is inserted into the inside of a cylindrical filter medium 3a made of filter paper, non-woven fabric, etc., inside the case main body 1 provided with an end plate (end plate (made of iron plate or synthetic resin)) 3c, 3
d is accommodated and the inner end (lower end) of the filter element 3 is elastically supported by a spring member 4 on the closed end wall 1b, while the outer end of the filter element 3, that is, the open end of the case body 1 is accommodated. A cover 2 interposed between the opening and closing of the through-hole 2b by a wavy annular check valve 5 made of a flexible rubber material causes the lower edge of the periphery thereof to be constricted by the constricted portion 1 of the case body 1.
c.

The cover body 2 is made of a thick iron plate of about 2 mm to 3 mm, has a screw cylinder portion 2a to be screwed to a communication cylinder Ba protruding from a bracket B on the engine side at the center, and a plurality of screw cylinder portions around the periphery. It has a through hole 2b, and its periphery is bent outward (upward in the figure) to form an upright wall 2c, and the upright wall 2c
Material 7 made of a liquid rubber material on the outer surface of the lower edge of the arc
Is applied on the constricted portion 1c of the case main body 1, and the upright wall 2c of the cover body of the peripheral wall 1a of the case main body is applied.
It is wound so as to be pressed against the outer surface, the end surface, and the inner surface of the outer open edge 2c, and a thick annular packing material 6 made of a flexible rubber material for sealing against the bracket B is fitted inside the outer edge 2c. ing.

[0005]

In the above-mentioned conventional liquid filter, the peripheral wall 1a of the case body 1 and the peripheral portion of the cover 2 are directly connected to each other, so that no extra parts are required and the structure is simple. It has the advantage that no welding work is required, but the peripheral wall 1a of the case body 1 is
When caulking, the direction of springback caused by the material of the peripheral wall edge portion to be pressed against the inner surface of the upright wall 2c is away from the upright wall 2c as shown by the dotted line in FIG. The tightening of the peripheral wall edge portion tends to loosen due to the internal pressure of the processing fluid in the above, causing looseness in the support of the filter element 3, mixing of fluid inside and outside the element, and the constriction of the lower surface of the peripheral wall 2c of the cover body and the case body. 1c may form a gap, from which untreated fluid may leak to the outside,
In addition, at the time of caulking, the peripheral wall edge of the case body 1 is bent to the thick cover body 2 so as to be aligned with the edge of the upright wall 2c at right angles, so that the fastening force during processing and the processing fluid during use are reduced. the deformation of the cover body 2 based on the internal pressure, which may particularly large stress at the edge portion of the case body 1 which is in contact corner spotted 2c ₁ on the outer periphery of the upright wall 2c is damaged caused.

Accordingly, the present invention effectively utilizes the spring-back phenomenon of the tightened portion based on the material of the case body to prevent the cover body from being loosened and moving, thereby ensuring the support of the filter element, and preventing the treated fluid from being mixed with the treated fluid. It is an object of the present invention to prevent the processing fluid from being mixed or leaked and to prevent the case body from being damaged.

[0007]

According to the present invention, a cylindrical filter element is elastically supported inside a cup-shaped case body having one end opened, and an open end is provided inside the cup-shaped case body. A cover body with a thick wall, a screw cylinder in the center, a plurality of through holes around it, and an upright wall is provided around the circumference, and the arc-shaped lower edge of the outer circumference of the upright wall is attached to the case body. An engine cartridge-type liquid filter that stops on the constricted portion provided and crimps the open end portion of the peripheral wall of the case body to the upright wall of the cover body. First, the upper edge of the outer wall of the upright wall of the cover body is formed in an arc shape or Formed on an inclined surface that intersects the end surface and the outer peripheral surface at an obtuse angle, and on the end surface of the upright wall, the open edge portion of the peripheral wall of the case body is tightly wound on two sheets and crimped according to the end face width, secondly, on the two sheets Upright wall of the cover body The open end portion of the peripheral wall of the case body to be crimped on the end face is protruded inward from the upright wall, and the inner inner peripheral portion is curled in an arc shape. The open edge portion of the peripheral wall of the case body to be crimped on the end surface of the wall is stretched inward from the upright wall, and the overhang portion is bent obliquely downward. A plurality of local recesses having a predetermined width and depth are formed on the upper edge, and the open end portion of the case body to be pressed in two layers on the end surface of the upright wall is inserted into the local recess.

[0008]

FIG. 1 shows an example of a liquid filter F according to the present invention, in which 11 is one end (the upper end in the figure).
Is a cup-shaped case body with open
a semicircular constricted portion 11c for stopping the cover body at a predetermined height at the open end of the peripheral wall 11a.
Is formed over the entire circumference, inside the case body 11, a spring member 14 for supporting a filter element is disposed on a closed end wall (bottom wall in the figure) 11b, and a filter paper and a nonwoven fabric are formed in a cylindrical shape (Kikuhana). A filter in which a porous inner cylinder 13b made of an iron plate or a synthetic resin is inserted inside a filter medium 13a formed in a cylindrical shape, a roll shape, a lamination shape of a desk, and the like, and end plates 13c and 13d of the same material are attached to both ends. The element 13 is housed and elastically supported by the spring member 14.

In the open end of the case body 11, 2 m
It is made of a thick iron plate of about m to 3 mm, has a screw cylinder 12a to be screwed to a communication cylinder Ba protruding from the engine side bracket B at the center, has a plurality of through holes 12b around it, and has includes a standing wall 12c on perimeter 12c ₁ even that took the horn is formed in an arc shape with outwardly bent and the lower perimeter 12c ₂ of the outer circumference (upward in the drawing) is formed arcuate to rest on the constricted portion 11c Cover body 12 is screwed to the central portion of the screw cylinder 1
A corrugated annular check valve 15 made of a flexible rubber material for opening and closing the through-hole 12b is fitted into the 2a, and the upright wall 1 is provided.
A seal member 17 made of a rubber material is applied to the outer surface of the lower edge 12c _{2 of the} 2c in a liquid state and is stopped on the constricted portion 11c of the case body 11.

An open edge portion 11d located outside (upper) of the cover body standing wall 12c on the peripheral wall 11a of the case body 11 is tightly wound in two layers, and an end face width is formed on the end face of the cover body standing wall 12c. The cover body 12 is pressed toward the case body 11 by the spring-back action of the winding-opening edge portion 11d, and the filter element 13 is held firmly in cooperation with the spring member 14. A thick annular packing material 16 made of a flexible rubber material is fitted inside the cover body standing wall 12c.

The peripheral wall 11a of the case body 11 and the cover 1
In joining the two upright walls 12c, as shown in FIG. 2A, the open edge 11d of the peripheral wall 11a of the case main body is about twice as long as the thickness of the cover body 12 and is higher than the upright wall 12c. stretched advance to the case body 11 and holder-by split mold D ₁ of the crimper or press, the edge portion 11
d curled inward hooked by crimping rollers or caulking-type D _2, then standing walls 12 while crushing the curl portion by a flat press type D ₃ as shown in FIG. 2 (B)
Press on the end face of c.

Thus, as shown in FIG. 2C, the open edge portion 11d of the case body 11 is
On the end face c, the sheet is folded in two layers, and the repulsive action presses the cover body 12 downward. At this time, even if a large tightening force acts on the edge portion 11d, the upper edge 121 of the outer periphery of the upright wall 12c is formed.
Since c ₁ is formed on the lower perimeter 12c ₂ similar arc,
As before, the open edge portion 11d does not hit the right-angled edge, so that there is no risk of being damaged.

The chamfering of the upper edge 12c of the outer periphery of the upright wall 12c of the cover body 12 is not limited to the arc shape as described above, but is also formed at an obtuse angle between the end surface and the outer peripheral surface of the upright wall 12c as shown in FIG. The function does not change even if it is formed by one intersecting slope or two similar slopes as shown in FIG. 3 (B).

FIG. 4 shows the case where the open end portion 11d of the peripheral wall 11a of the case body 11 is
An example in which the constricted portion of the peripheral wall 11a of the case main body 11 is formed into a substantially quarter-arc shape on the end surface of the case 2c, which is wound and crimped in two layers in accordance with the width thereof. The elongation of the constricted portion 11c based on the internal pressure of the processing fluid can be made smaller than that of the semicircular shape without changing the supporting state of the processing fluid.

FIG. 5 shows the open end portion 11d of the peripheral wall 11a of the case body 11 which is pressed against the end face of the upright wall 12c of the cover body 12 in two layers.
An example is shown in which the cover body 12 protrudes inward from 2c and the lower inner peripheral portion is curled in an arc shape to be pressed against the end face of the upright wall 12c. The restrained state is strengthened, the pressure resistance of the case main body 11 is improved, and at the same time, the packing material 16 (in this case, an L-shaped cross section is used) can be prevented from being damaged. FIG. 6 shows an example in which the open end portion 11d of the case main body 11 is formed so as to protrude inward from the upright wall 12c on the cover body 12 and the protruding portion is bent obliquely downward as in FIG. The suppression state of the cover body 12 and the filter element 13 can be further strengthened. 5 and 6, the upright wall 1 is used.
Better to the slope as shown in FIG. 3 (A) or (B) is suitable for seaming the edge portions 11d of the case body the perimeter 12c ₁ on the outer periphery of 2c.

FIGS. 7 and 8 show a cover upright wall 12c.
A plurality of rectangular or arc-shaped local recesses 18 of a required width and depth are formed in the upper edge of the inner periphery of the inner periphery of the inner peripheral portion, and the local recesses 18 are formed when the open edge portion 11d of the peripheral wall 11a of the case body 11 is tightened and crimped. The portion corresponding to 18 is deformed downward to form the recess 1
8 shows an example in which the cover body 12 is securely inserted into the case body 11 and the cover body 12 is reliably prevented from rotating. Improve. If a plurality of projections 19 are provided annularly or locally at positions outside the through holes 12b of the cover body 12 as shown in FIG. 9, it is possible to help prevent the packing material 16 mounted on the cover body 12 from falling off.

The cylindrical filter medium 13a is not limited to the above-described filter paper and nonwoven fabric, but may be a porous metal body. In the illustrated example, the filter F is suspended from the bracket B. However, the present invention is not limited to this, and the filter F is used in an upright state or a sideways state. In the illustrated hanging state, the check valve 15 may not be used.

[0018]

The present invention is configured as described above as a cartridge type liquid filter used for a lubricating system and a fuel system of an engine. Therefore, the peripheral wall of the case main body which is caulked to the upright wall around the cover body is provided. The cover body and the filter element can be reliably suppressed by effectively utilizing the spring-back action of the open edge portion, and the wound portion does not loosen even when receiving the internal pressure of the processing fluid during use, and the filter element does not loosen. The rattle is prevented, the treated and untreated fluids do not mix, and the fluid does not leak to the outside.The cover body has the right-angled edge on the upper edge of the upright wall as before. Since the cover body is not deformed by the tightening force at the time of assembly or the internal pressure of the fluid at the time of use, the case body is not damaged. Then, the open edge of the case body to be pressed against the upright wall of the cover body is protruded inward from the upright wall, and the lower inner peripheral portion is curled in an arc shape to prevent the packing material from coming off and to prevent damage. If the overhanging portion is bent obliquely downward, the suppression of the cover body and the filter element becomes stronger, and the durability of the case body can be improved. Furthermore, if a plurality of local recesses are formed on the upper edge of the inner wall of the upright wall of the cover body, and the open end portion of the peripheral wall of the case body is crimped so as to fit into the recesses, the gap between the case body and the cover body can be obtained. The mounting is strengthened, and the relative rotation between the two can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a half sectional side view of an example of a liquid filter according to the present invention.

FIG. 2A is an explanatory view of a first step of tightening a peripheral edge of a case main body. (B) is an explanatory view of the second step. (C)
FIG. 3 is a cross-sectional view of a main part showing a state after tightening.

FIG. 3A is a sectional view of another example of an upright wall portion of a cover body. (B) is sectional drawing of another example of the same part.

FIG. 4 is a partial cross-sectional view of a modified example.

FIG. 5 is a partial sectional view of another modification.

FIG. 6 is a cross-sectional view of the upper half of still another modified example.

FIG. 7 is a partial sectional view of still another modification.

FIG. 8 is a front view of a part of FIG. 7 viewed from the XX line direction.

FIG. 9 is a partial sectional view of still another example.

FIG. 10 is a half sectional side view of a conventional liquid filter.

FIG. 11 is an explanatory view showing a conventional caulking state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Case main body 11a Peripheral wall 11c Constriction part 11d Open edge part 12 Cover body 12a Screw cylinder part 12b Through hole 12c Standing wall 13 Filter element 13a Filter material 16 Packing material F Liquid filter

Claims (4)

[Claims] 1. A cylindrical filter element is elastically supported inside a cup-shaped case main body having one end opened, and a thick-walled central portion of a screw cylinder is provided in the open end and is provided around the periphery thereof. A cover body having a plurality of through-holes and an upright wall provided in the periphery is disposed, and an arc-shaped lower edge of the outer wall of the upright wall is stopped on a constricted portion provided in the case body, and the peripheral wall of the case body is opened. In a liquid filter for crimping an edge portion to an upright wall of a cover body, an upper edge of an outer wall of the upright wall of the cover body is formed in an arc shape or a slope that intersects an obtuse angle with an end face and an outer peripheral surface, and a case body is formed on an end face of the upright wall. A cartridge type liquid filter for an engine, characterized in that the open end portion of the peripheral wall of the above is wound in two layers and crimped according to the end face width. 2. An open edge portion of a peripheral wall of a case main body which is rolled and tightened in two layers and pressed onto an end face of an upright wall of a cover body is extended inward from the upright wall, and an inner inner peripheral portion thereof is curled in an arc shape. The cartridge type liquid filter for an engine according to claim 1, wherein: 3. An open edge portion of a peripheral wall of a case body, which is wound in two layers and pressed onto an end surface of an upright wall of a cover body, is extended inward from the upright wall, and the extended portion is bent obliquely downward. The cartridge type liquid filter for an engine according to claim 1, wherein: 4. A plurality of local recesses having a predetermined width and a predetermined depth are formed in the upper edge of the inner wall of the upright wall of the cover body, and the open edge portion of the case body to be pressure-bonded in two layers on the upright wall end surface is formed. 3. The method according to claim 1, wherein said local recess is inserted into said recess.
Or a cartridge type liquid filter for an engine according to 3.