JP2010007627A - Strainer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid vertical increase of an installation space by reducing dimension in the vertical direction, and to inhibit increase of weight due to reinforcement. <P>SOLUTION: A strainer 1 is provided with a filter 10 and a cylindrical body part 21 storing the filter 10. A suction hole and a discharge hole 23 are formed on the body part 21. The body part 21 has a wide shape having an axis thereof extended in a direction crossing the up-and-down direction, and having a dimension in the up-and-down direction of a cross section perpendicularly crossing the axis set shorter than a dimension in a horizontal direction. A flange 26 projecting in a width direction is formed along a circumference wall part of the body part 21 in the periphery of the discharge hole 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a strainer for filtering fluid.

Conventionally, for example, a strainer for filtering oil is disposed in an oil pan of a vehicle engine (see, for example, Patent Document 1). The strainer of Patent Document 1 includes a plate-like filter and a filter housing portion that houses the filter. The filter housing portion has a thick hollow plate shape corresponding to the shape of the filter, and is formed to extend vertically. A suction pipe extending from the filter housing portion is integrally formed at the lower portion of the filter housing portion, and a discharge pipe extending from the filter housing portion is integrally formed at the upper portion. A flange-shaped attachment portion is formed at the end of the discharge pipe, and this attachment portion is fastened and fixed to the engine.
JP 2005-111432 A

  However, since the filter accommodating portion of the strainer has a plate shape extending in the vertical direction, a space for arranging the strainer must be secured in the vertical direction inside the oil pan. It may not be possible to meet the demand for compactness.

  Further, while the strainer is in use, an excitation force acts on the mounting portion fixed to the engine, but the filter housing portion contains a filter and is relatively heavy. A large force acts between the mounting portion and the filter housing portion. At this time, in the case of Patent Document 1, since the discharge pipe having the mounting portion protrudes from the filter housing portion and the mounting portion and the filter housing portion are separated from each other, reinforcement of the mounting portion becomes significant, and the weight of the strainer Will increase.

  The present invention has been made in view of such points, and the object of the present invention is to shorten the vertical dimension of the filter housing portion so that the space for installation does not have to be increased vertically. Furthermore, there exists in suppressing the increase in the weight by reinforcement.

  In order to achieve the above object, according to the first aspect of the present invention, a filter and a cylindrical filter accommodating portion that accommodates the filter are provided, and suction holes and discharge holes are respectively provided on both sides in the axial direction of the filter accommodating portion. The strainer is a wide shape in which the axis is extended in a direction intersecting with the vertical direction, and the vertical dimension of the cross section perpendicular to the axis is set shorter than the horizontal dimension. And the attachment part which protrudes in the width direction is formed in the peripheral part of the said discharge hole along the surrounding wall part of the said filter accommodating part.

  According to a second aspect, in the first aspect, the mounting portion is formed with an annular protrusion that protrudes in the axial direction of the discharge hole from the peripheral portion of the discharge hole and extends along the peripheral portion. It is set as the structure by which the cyclic | annular sealing member is fitted by the outer peripheral part.

  According to the first aspect of the present invention, the filter housing portion is formed so that its axis extends in a direction intersecting the vertical direction, and the vertical dimension of the cross section has a wide shape shorter than the horizontal dimension. Therefore, the vertical dimension of the filter housing portion can be shortened. Thereby, a strainer can be arrange | positioned, without enlarging the space for arrangement | positioning up and down. In addition, since the attachment portion protrudes in the width direction along the peripheral wall portion of the filter housing portion, the attachment portion and the filter housing portion are not separated from each other, and large-scale reinforcement is not necessary. And since the attaching part is along the surrounding wall part of a filter accommodating part in that way, an attaching part can be reinforced using this surrounding wall part. Thereby, the increase in weight can be suppressed.

  According to the second invention, the annular protrusion is formed in the mounting portion, and the seal member is fitted to the outer peripheral portion of the annular protrusion. Therefore, the seal member is held in advance in a state assembled to the filter housing portion. I can leave.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows a strainer 1 according to an embodiment of the present invention. Although not shown, the strainer 1 is arranged in an oil pan provided at the lower part of the automobile engine. The strainer 1 includes a filter 10 (shown in FIG. 2) that filters oil and a case 20 (shown in FIG. 1) that houses the filter 10. The case 20 has a cylindrical main body part (filter housing part) 21 fixed to the engine and a suction pipe 22, and the main body part 21 and the suction pipe 22 are welded and integrated. A discharge hole 23 is formed in the main body 21, and the filter 10 is accommodated in the main body 21.

  The main body 21 is formed so that the axis extends substantially horizontally, and has a wide shape in which the vertical dimension of the cross section in the direction perpendicular to the axis is shorter than the horizontal dimension. As shown in FIG. 3, an upper flat portion 21a and a lower flat portion 21b are formed on the upper and lower portions of the peripheral wall portion of the main body portion 21, respectively. The upper and lower flat portions 21a and 21b extend horizontally along the axis. Both sides in the width direction of the peripheral wall portion of the main body portion 21 are formed so as to curve outwardly of the main body portion 21 between the upper flat portion 21a and the lower flat portion 21b.

  As shown in FIG. 3 and FIG. 4, an enlarged diameter portion 25 having a larger diameter than the intermediate portion in the axial direction is formed on the suction pipe 22 side, which is the upstream side of the main body portion 21. As shown in FIGS. 5 and 6, a stepped portion 25 a into which a fixing plate portion (described later) of the filter 10 fits is formed continuously in the circumferential direction on the inner peripheral surface of the enlarged diameter portion 25. On the upstream side of the stepped portion 25a on the inner peripheral surface of the enlarged diameter portion 25, a welded portion 25b having a stepped shape is formed continuously in the circumferential direction.

  The discharge hole 23 is formed at the end of the main body 21 on the downstream side opposite to the suction pipe 22. As shown in FIGS. 5 and 6, the discharge hole 23 extends in the vertical direction and opens upward. A flange (attachment portion) 26 extending in the radial direction from the peripheral edge portion of the discharge hole 23 is formed on the downstream side of the main body portion 21. The upper surface of the flange 26 extends substantially parallel to the upper flat portion 21a. As shown in FIG. 4, the flange 26 protrudes on both sides in the width direction of the main body portion 21 along the peripheral wall portion of the main body portion 21, and as shown in FIG. Through holes 26a and 26a penetrating in the direction are formed. Bushings 27, 27 are fitted into the respective through holes 26a, 26a, and bolts (not shown) for fastening the flange 26 to the cylinder block of the engine are inserted into each bush 27. .

  The base portions on both sides in the width direction of the flange 26 are integrated with the peripheral wall portion of the main body portion 21, and the strength of the base portion is increased. Ribs 28, 28 projecting from the side of the peripheral wall portion of the main body 21 are connected to the front end side of the flange 26 in the protruding direction. Further, on the upper surface of the flange 26, there is formed an annular projecting portion 26b that protrudes upward, protrudes upward from the peripheral portion of the discharge hole 23, and extends along the peripheral wall portion. An annular seal member 30 is fitted on the outer peripheral portion of the annular protrusion 26b. The seal member 30 is for sealing between the peripheral portion of the discharge hole 23 and the peripheral portion of the opening of the engine side oil passage to which the discharge hole 23 is connected, and is configured by, for example, an O-ring or the like can do. Further, a plurality of lightening portions 26c, 26c,... For preventing sink marks during molding are opened on the upper surface of the flange 26.

  As shown in FIG. 7, recessed portions 21 c and 21 c that are recessed toward the inside of the main body portion 21 are formed below the flange 26 in the peripheral wall portion of the main body portion 21. The recessed portion 21c is for facilitating the insertion of the bolt into the bush 27 when the strainer 1 described later is attached. The depth of the recess 21 c is set so that the cross-sectional area of the oil passage in the main body 21 does not become smaller than the cross-sectional area of the discharge hole 23. Moreover, the shape of the hollow part 21c is curving so that the cross-sectional area of the oil flow path in the main-body part 21 may change gradually. By these things, the oil in the main-body part 21 flows smoothly toward the exit of the discharge hole 23. FIG.

  As shown in FIG. 5, the suction pipe 22 constitutes a suction hole 29, and is bent at the center in the axial direction. The downstream side, which is the main body portion 21 side of the bent portion of the suction pipe 22, extends along the axis of the main body portion 21, while the upstream side, which is the opposite side, includes an inclined pipe portion 22 a that extends downwardly. ing. A suction hole 29 is opened at the upstream end of the inclined pipe portion 22a. A cylindrical portion 32 formed so as to cover the outer peripheral surface of the suction pipe 22 is provided at the downstream end of the suction pipe 22. The cylindrical portion 32 is inserted into the enlarged diameter portion 25 of the main body portion 21.

  On the outer peripheral surface of the cylindrical portion 32, a welding portion 32 a having a step shape is formed at a portion facing the welding portion 25 b of the main body portion 21 so as to continuously extend in the circumferential direction. Further, the cylindrical portion 32 is formed with an abutting portion 32 b that abuts on the upstream end portion of the main body portion 21.

  Further, at the downstream end portion of the suction pipe 22, an inner peripheral pressing portion 34 that presses the inner peripheral portion of the fixing plate 12 of the filter 10 and an outer peripheral pressing portion 35 that presses the outer peripheral portion of the fixing plate 12 are projected. . The inner periphery pressing part 34 and the outer periphery pressing part 35 are respectively continuous in the circumferential direction. The outer periphery pressing part 35 corresponds to the step part 25a.

  As shown in FIG. 2, the filter 10 is an integrally molded product of a resin material. The filter 10 is formed as a bottomed square tube as a whole, and a fixed portion provided on the opening 11 a side of the filter 11. And a plate 12. The filtration part 11 is formed with a mesh part 11b over the whole and provided with a rib 11c. On the opposite side of the filtration part 11 from the fixed plate 12, contact pieces 11d that contact the inner peripheral surface of the main body part 21 are provided corresponding to the four corners. The fixed plate 12 extends in a direction orthogonal to the axis of the filtration part 11 and is formed so as to fit into the step part 25a of the main body part 21, as shown in FIGS.

  The strainer 1 configured as described above is manufactured as follows. First, the filter 10 is inserted and accommodated in the main body 21 from the enlarged diameter portion 25 side of the main body 21. At this time, the filter 10 of the filter 10 is oriented so as to be positioned on the discharge hole 23 side of the main body 21. When the filter 10 is completely accommodated in the main body portion 21, the fixing plate 12 of the filter 10 is fitted into the step portion 25 a of the main body portion 21, and the filter 10 is positioned.

  Thereafter, the suction pipe 22 is ultrasonically welded to the main body 21. That is, the main body 21 is fixed to a jig of an ultrasonic welder (not shown), the cylindrical portion 32 of the suction pipe 22 is inserted into the enlarged diameter portion 25 of the main body 21, and the suction pipe 22 is connected to the welder. Fix to the horn. Then, the welding part 32a of the suction pipe 22 and the welding part 25b of the main-body part 21 contact | connect. When the horn is vibrated ultrasonically in this state, both the welded portions 32 a and 25 b are melted, and the cylindrical portion 32 of the suction pipe 22 enters the expanded diameter portion 25 deeply. Eventually, the inner and outer periphery pressing portions 34 and 35 hit the fixed plate 12, and the fixing plate 12 is held between the stepped portion 25 a and the outer periphery pressing portion 35. At this time, the contact piece 11 d of the filter 10 contacts the inner peripheral surface of the main body 21. Further, the abutting portion 32 b of the cylindrical portion 32 abuts on the upstream end portion of the main body portion 21. When the welded portions 32a and 25b are solidified, the main body 21 and the suction pipe 22 are welded and integrated over the entire circumference. In addition, you may make it integrate the suction pipe 22 and the main-body part 21 by methods other than ultrasonic welding.

  When the strainer 1 is attached to the engine, the following is performed. That is, first, the annular protrusion 26b of the main body 21 is inserted into the engine-side oil passage. Then, after the bolt is inserted into the bush 27 from below the flange 26, it is screwed into a screw hole (not shown) of the engine to fasten and fix the flange 26 to the engine. Since the main body portion 21 of the strainer 1 has a cylindrical shape extending in the horizontal direction and has a flat shape formed wide, the vertical dimension of the strainer 1 is shortened. Thereby, it is not necessary to increase the space for disposing the strainer 1 vertically.

  When the pump is activated by the operation of the engine, the oil in the oil pan is sucked into the main body portion 21 through the suction hole 29 and flows into the filter 10 from the opening port 11a of the filter 10, and then passes through the mesh portion 11b. Then, it is filtered and discharged from the discharge hole 23. When the pump is operated, an excitation force acts on the flange 26. At this time, since the flange 26 protrudes in the width direction along the peripheral wall portion of the main body portion 21, the flange 26 and the main body portion 21 are close to each other, and the peripheral wall portion of the main body portion 21 and the base portion of the flange 26 are Since the flanges 26 are reinforced by the peripheral wall portion, sufficient durability can be obtained without carrying out extensive reinforcement.

  As described above, the main body 21 that accommodates the filter 10 is formed so that the axis thereof extends in a direction intersecting the vertical direction, and the width of the cross section in the vertical direction is shorter than the horizontal dimension. Since it was made to become, the dimension of the up-down direction of the main-body part 21 can be shortened. Thereby, the strainer 1 can be disposed without increasing the space for placement vertically. Further, since the flange 26 protrudes in the width direction along the peripheral wall portion of the main body portion 21, the flange 26 and the main body portion 21 are not separated from each other, and a large-scale reinforcement is unnecessary. In addition, the flange 26 can be reinforced using the peripheral wall portion of the main body 21. Thereby, the increase in the weight of the strainer 1 can be suppressed.

  In addition, since the annular protrusion 26b is formed on the flange 26 and the seal member 30 is fitted to the outer peripheral portion of the annular protrusion 26b, the seal member 30 can be held in a state assembled to the main body portion 21, Assembling workability to the engine can be improved.

  In the above-described embodiment, the case 20 is divided into two parts. However, the case 20 may be an integrally molded product, or may be divided into three or more parts.

  Moreover, although the said embodiment demonstrated the case where the filter 10 was cylindrical, not only this but the filter 10 may be plate shape.

  Moreover, in the said embodiment, although the main-body part 21 of the case 20 is formed so that an axis line may extend substantially horizontally, not only this but the main-body part 21 is extended so that an axis line may cross | intersect an up-down direction. When the crossing angle is, for example, 20 ° or less, the vertical dimension of the strainer 1 can be sufficiently shortened.

  Further, the axial dimension of the main body 21 may be shortened so that the downstream end of the filter 10 is positioned in the vicinity of the edge of the discharge hole 23 as in the modification shown in FIG. Thereby, the strainer 1 can be made compact.

  As described above, the strainer according to the present invention is suitable for being disposed in an oil pan of an engine, for example.

It is a perspective view of the strainer which concerns on embodiment. It is a disassembled perspective view of a strainer. It is a side view of a strainer. It is a top view of a strainer. It is the VV line end view in FIG. It is the VI-VI line end view in FIG. It is the VII-VII line end view in FIG. FIG. 8 is a diagram corresponding to FIG. 7 according to a modified example.

Explanation of symbols

1 Strainer 10 Filter 20 Case 21 Main Body (Filter Housing)
22 Suction pipe 23 Discharge hole 26 Flange (mounting part)
26b Annular protrusion 29 Suction hole 30 Seal member

Claims (2)

A strainer comprising a filter and a cylindrical filter housing portion for housing the filter, each having a suction hole and a discharge hole on both sides in the axial direction of the filter housing portion,
The filter accommodating portion is formed so that the axis extends in a direction intersecting the vertical direction, and has a wide shape in which the vertical dimension of the cross section perpendicular to the axial line is set shorter than the horizontal dimension,
The strainer is characterized in that a mounting portion that protrudes in the width direction along the peripheral wall portion of the filter housing portion is formed at the peripheral portion of the discharge hole. The strainer according to claim 1, wherein
The mounting portion is formed with an annular protruding portion that protrudes in the axial direction of the discharge hole from the peripheral portion of the discharge hole and extends along the peripheral portion,
A strainer, wherein an annular seal member is fitted on the outer peripheral portion of the annular protrusion.

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