JPH1085522A - Oil strainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use no retainer for fixing by increasing the filtration surface area of a mesh filter material to be installed in a body with a set size, inhibiting the filter material from being clogged, and at the same time increasing the rigidity. SOLUTION: A shelf part 11b is formed in the circumference of the inside of a dish-like body 11, which is made of a metal or synthetic resin, opened in the upper part, and has extended flange 11a in the circumferential part, and at the same time an oil inlet is formed in the bottom part of the body 11. A corrugated and pleated metal net 12 is so installed in the inside of the body 11 as to overlap the circumferential part of the metal net 12 on the shelf part 11b and an adhesive layer 13 is formed in the shelf part 11b on which the metal net 12 is to be overlapped and also in vertical grooves 11e in the corners of the shelf part to stick the metal net 12 to the body 11, so that the filtration surface area can be widened and the rigidity is increased as compared with one for which a plate-like metal net is used and a retainer for pressing a metal net is dispensed with.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil strainer mainly for treating hydraulic oil in an automatic transmission of a vehicle.

[0002]

2. Description of the Related Art In an automatic transmission using a torque converter widely used in vehicles, a valve chamber C containing various control valves is provided below a transmission gear casing A as shown in FIG. Then, an oil pan B containing a predetermined amount of hydraulic oil is mounted therein, and the hydraulic oil is sucked up by a pump P in a casing A to adjust a gap between blades of the torque converter T and to operate a valve. In addition, an oil strainer S is disposed below the valve chamber C to constantly filter the circulating hydraulic oil.

As an example of the oil strainer S, as shown in FIGS. 10 and 11, an iron plate-like plate having an appropriate shape such as a square or an ellipse and having a flange 1a on the periphery and an oil inlet 1b on the bottom wall is shown. Mesh on the upper surface of body 1
A flat wire mesh 2 of about 0 mesh to 200 mesh is provided, and a grid-like retainer 3 made of iron plate provided with vertical and horizontal ribs 3a is additionally provided thereon. 2 is caulked to the collar 1a of the body 1, and the oil strainer S is attached to the lower surface of the valve chamber C through the collar 1a of the body 1. When the pump P operates, the oil in the oil pan B The water is sucked up through the passage Ca in the chamber C, filtered by the wire mesh 2 and sent to a predetermined place.

[0004]

In the above-mentioned conventional oil strainer, a plate-shaped wire mesh is used as a filter material, and the body cannot be made as large as the difference due to the setting location (about 12 cm ^{2 in} plane area). The filter area is small and clogging occurs quickly, fine mesh is difficult to use, it is easy to deform and a grid-like retainer is required to prevent deformation, and the filter area is reduced only at the ribs of the retainer , And the peripheral sealing properties are not good.

Therefore, the present invention increases the filtering area of a wire mesh as a filter medium for a body whose size is limited, makes it difficult to cause clogging, enables the use of a wire mesh with a fine mesh, and reduces deformation. An object of the present invention is to make it possible to prevent the occurrence of such a phenomenon, to provide a good sealing property, and to omit a retaining retainer.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides an oil strainer for an automatic transmission of a vehicle, which is firstly made of metal or synthetic resin, has an upper part opened and a projecting collar on the periphery. At the bottom part, a shelf part protruding inward is formed inside a dish-shaped body provided with an oil inlet, and a wire mesh of a predetermined size, which is pleated in a wavy shape, is placed around the shelf part with its peripheral part placed on the shelf part. And a wire mesh is attached to the body by forming an adhesive layer on the shelf, and secondly, the widthwise side portions of the crests and valleys of the wire mesh pleated are used. The flat pieces were flattened at both ends, and the flat side portions and both end pieces were placed on the shelf to mount the wire netting in the body. Third, the wire mesh was pleated. Crush both sides in the width direction of the peaks and valleys of the wire mesh Flattening and flattening both end pieces, caulking a band metal plate to the flat side portions or both side portions and both end portions, placing the both side portions and both end portions on a shelf, and attaching a wire mesh to the body. And fourth,
It is made of metal or synthetic resin, has an open top, has a protruding brim on the periphery, and has a shelf that protrudes inward inside a dish-shaped body provided with an oil inlet at the bottom, and is pleated in a wave shape. A sealing material layer is integrally formed around a wire mesh having a size, and the sealing material layer is mounted on the shelf with an adhesive interposed therebetween, and the wire mesh is attached to the body. Things.

[0007]

1 to 3 show an example of an oil strainer S according to the present invention. FIG. 1 shows a state in which a body 11 and a wire mesh 12 serving as a filter medium are separated from each other. Metal such as stainless steel plate or nylon,
It is made of a synthetic resin such as polypropylene, and has a rectangular dish shape with an open upper part. The outer periphery of the upper part is provided with a flange 11a having a plurality of screw insertion holes 11d and extending outward. The peripheral wall is provided with a filter medium receiving shelf 11b protruding inward at a substantially central height position and is stepped, and an oil inlet 11c is drilled at one corner from the bottom wall to the lower part of the peripheral wall. In addition, vertical grooves 11e for embedding an adhesive are provided at four corners of the shelf 11b.

On the other hand, the wire mesh 12 serving as a filter medium has a mesh of 200
It is a mesh or about 300 mesh and is made of a thin wire such as iron, stainless steel, brass, etc., and is pleated in a wavy shape having a height substantially matching the depth from the upper surface of the body 11 to the shelf 11b. It is formed with a width and length that can be inserted inside.

The wire mesh 12 is arranged in the body 11 as shown in FIG. 2 so that its peripheral portion is placed on the shelf 11b, and the peripheral portion is filled with a vertical groove 11e at a corner and the shelf 1b.
An epoxy-based, vinyl-based adhesive or the like is filled so as to cover the top of the wire 1b, and the wire mesh 12 is hermetically fixed to the body by the frame-shaped adhesive layer 13.

[0010] Thus, the oil strainer S is the body 11
It is used by being detachably attached to the lower side of the valve chamber C of the transmission via a flange 11a by a screw member. In use, the oil in the oil pan B is supplied from the inlet 11c on one side of the bottom of the body 11 by the operation of the pump. The pulp chamber C is filtered by entering the body 11 and traversing the wire mesh 12.
Is sent to a predetermined place through a passageway inside.

In this case, since the wire mesh 12 forming the filter medium is pleated in a wavy shape, the filtration area becomes significantly larger than that of the conventional plate-like material, and the clogging hardly occurs. It is possible to use a finer mesh than that of the above (in other words, if the ventilation resistance to the initial state of the entire wire mesh is constant, the area of the finer mesh must be larger than that of the coarser mesh. And the rigidity of the wire mesh 12 is increased so that the wire mesh 12 is hardly deformed, and a retainer for holding the wire mesh is not required.

By the way, the wire mesh 12 of a fixed length which has been pleated in a wavy shape tends to be rounded, and there is a surface which is difficult to assemble with the body 11, and this is solved in FIG. Is flattened by crushing both widthwise side portions of the crests 12a and the valleys 12b of the corrugated wire mesh 12 with a press machine as shown by dotted lines, and end pieces 12c at both ends.
Is stretched flat, the crushed side and the stretched end piece are placed in the body 11 so as to be placed on the shelf 11b as shown in FIG. 5, and the adhesive layer as described above is placed on the shelf 11b. 13 is formed, and the wire mesh 12 is hermetically attached to the body 11.

FIG. 6 is a plan view of the corrugated wire mesh 12 in which the ridges 12a and the valleys 12b are flattened from the flattened sides to the end pieces 12c, or the strips are formed on the edges of both sides and the end pieces. The strut 14 is caulked to prevent fraying of the edge of the wire mesh 12 and to maintain flatness, so that both sides and both end pieces are placed on the shelf 11b.
9 shows a modified example of a wire mesh that is easy to assemble.

FIG. 7 shows a state in which a pleated wire mesh 12 of a fixed size is set in a mold of an injection molding machine.
A liquid rubber such as urethane rubber or acrylonitrile butadiene rubber or a liquid resin such as rubber-modified epoxy resin or vinyl chloride resin is injected into a concave portion of the mold facing the peripheral portion of the metal mesh 12, and a sealing material is provided around the metal mesh 12. FIG. 8 shows another modified example in which the layer 15 is integrally formed to improve the sealing property around the wire mesh. The wire mesh 12 is provided with an adhesive agent as shown in FIG. On the shelf 11b. Its use condition is the same as that described above.

In the illustrated example, the body 11 has a rectangular outer shape. However, the present invention is not limited to this, and the body 11 may be trapezoidal, elliptical, circular, or the like. It is desirable that the setting position of the oil inlet 11c is not limited to the corner but may be the center of the bottom wall. Furthermore, the oil strainer of this application does not require a retainer for wire mesh holding as described above, but a large amount of oil such as when climbing a steep slope on a large vehicle or when the load is large and the speed is increased. In the case of suctioning at one time, an opening corresponding to a retainer may be provided in the opening on the lower surface of the valve chamber.

[0016]

Since the present invention is configured as described above, it has the following effects. In the oil strainer according to the first aspect, the wire mesh pleated in a wave shape is arranged in a dish-shaped body of a predetermined size, and an adhesive layer is formed around the body to be mounted. Compared to those using a plate-shaped wire mesh, the filtration area can be significantly increased, the use of fine mesh wire mesh becomes possible, the filtration performance can be improved, the rigidity of the wire mesh increases, and it is difficult to deform Thus, the retainer can be omitted while maintaining the sealing performance. In the oil strainer according to the second aspect, the both sides and both ends of the corrugated wire mesh are flattened to prevent the corrugated wire mesh from being rounded, so that the corrugated wire mesh is easily mounted on the body. According to the third aspect of the present invention, the strip metal is caulked to the flattened side portions or both side portions and both end pieces to be attached to the body, so that the edge of the wire mesh is prevented from being frayed and the wire mesh is prevented. Can be maintained flat. According to the fourth aspect of the present invention, the sealing material layer is integrally formed around the corrugated wire net and attached to the body.
This makes it easier to assemble the body and improves the sealing performance.

[Brief description of the drawings]

FIG. 1 is a perspective view of an example of the present invention in which a body and a wire mesh are separated.

FIG. 2 is a perspective view in which the body and the wire mesh of FIG. 1 are integrated.

FIG. 3 is a sectional view showing a state in which the device shown in FIG. 2 is attached to a lower side of a valve chamber.

FIG. 4 is a perspective view of a modified example of a wire mesh.

FIG. 5 is a cross-sectional view in which the apparatus using the wire mesh of FIG. 4 is attached to a lower side of a valve chamber and cut in a width direction of the wire mesh.

FIG. 6 is a perspective view of a part of another modified example of the wire net;

FIG. 7 is a perspective view of still another modification of the wire mesh.

FIG. 8 is a cross-sectional view showing a state where a strainer using the wire mesh of FIG. 7 is attached to a lower side of a valve chamber.

FIG. 9 is a schematic side view of the automatic transmission of the vehicle.

FIG. 10 is a perspective view of a conventional oil strainer.

FIG. 11 is a sectional view of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Body 11a Collar 11b Shelf 11c Oil inlet 12 Wire mesh 12a Mountain 12b Valley 13 Adhesive layer 14 Strip metal 15 Seal material layer C Valve chamber S Oil strainer

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F01M 11/03 F16H 57/04 F F16H 57/04 B01D 29/06 510A

Claims (4)

[Claims] 1. A shelf which is made of metal or synthetic resin, has an open top, has a protruding brim on the periphery, and has a bottom formed with a shelf protruding inward inside a dish-shaped body provided with an oil inlet. A wire mesh of a predetermined size pleated on the shelf is placed in the body with its peripheral portion placed on the shelf, an adhesive layer is formed on the shelf, and the wire mesh is attached to the body. Oil strainer. 2. The pleated corrugated wire mesh is flattened by flattening both side portions in the width direction of the crests and valleys, and both end pieces are flattened. 2. The oil strainer according to claim 1, wherein the wire mesh is mounted inside the body. 3. The pleated corrugated wire netting is flattened by flattening and flattening both end portions in the width direction of the crests and valleys of the wire mesh, and the flat side portions or both side portions and both end portions are provided with a sheet metal. 3. The oil strainer according to claim 1, wherein the wire mesh is attached to the body with the both sides and both end pieces placed on a shelf. 4. A shelves made of metal or synthetic resin, which are open at the top, have an overhanging flange at the periphery and have a bottom with an oil inlet formed inside a dish-shaped body, A sealing material layer is integrally formed around a pleated wire mesh of a predetermined size, and the sealing material layer is placed on the shelf with an adhesive interposed therebetween, and the wire mesh is attached to the body. And an oil strainer.