JP5815075B2 - Oil strainer - Google Patents

Description

  The present invention relates to an oil strainer that removes impurities from oil circulating inside a power unit in a vehicle, for example.

  2. Description of the Related Art Conventionally, a power device such as an engine or transmission in a vehicle has been provided with an oil strainer that removes impurities such as dust contained in oil circulating inside the power device. For example, an oil strainer disclosed in Patent Document 1 includes a rectangular short cylindrical case having a hollow portion in which a filter for filtering oil is disposed, and the oil is placed in the lower portion of the case. An inflow hole through which the oil flows into the hollow part is formed, and an outflow hole through which oil flows out from the hollow part is formed at the upper part of the case. The case is divided vertically into an upper case located on the upper side and a lower case located on the lower side at a substantially central position in the vertical direction. The lower case is assembled to the upper case by welding the outer peripheral edge of the filter with the lower edge periphery of the upper case and the upper edge periphery of the lower case sandwiched therebetween.

Japanese Patent No. 3469349 (paragraph 0022, FIG. 2)

  By the way, in recent years, due to an increase in the number of parts accompanying the performance enhancement of the vehicle, there is almost no extra space inside the vehicle, and further downsizing of the oil strainer is required.

  In order to achieve this, the lower case is formed into a flat annular frame member, and a filter is disposed inside the annular frame member. It is conceivable to make the entire strainer compact.

  However, if the lower case has a flat annular structure, the rigidity of the lower part of the oil strainer is reduced, and when an impact is applied to the lower part of the power unit unexpectedly, the oil strainer is deformed to sufficiently perform the filtering function. There is a risk of disappearing.

  Further, in the oil strainer disclosed in Patent Document 1, no consideration is given to mutual positioning when the lower case is assembled to the upper case. Accordingly, the assembly of the lower case with the lower case being displaced with respect to the upper case is caused by rushing the assembly, resulting in an assembly failure.

  The present invention has been made in view of such points, and the object of the present invention is to have an excellent assembling property to prevent the occurrence of improper assembling and to be compact without reducing the rigidity. To provide an oil strainer.

  In order to achieve the above object, the present invention is characterized in that the lower case of the oil strainer is an annular frame member, and the structure of the assembly portion of the case and the annular frame member has been devised.

That is, in the first invention, a case body having a hollow portion passing through the oil downwardly open, and a resin case having a outlet hole for discharging the oil communicating with the hollow portion from the hollow portion, a flat A resin-made annular frame member that is formed in an annular shape and has an inflow hole for allowing oil to flow into the hollow portion therein, and that is assembled to the lower peripheral edge of the case body , covers the inflow hole, and extends from the inflow hole to the hollow portion The case main body is provided in parallel with a rectangular plate-like upper surface portion extending in the horizontal direction and extending downward from both side edges of the upper surface portion in the width direction. and a substantially triangular pair of side portions in side view, the lower end periphery of the case body, an annular projecting portion that faces the annular frame member in a state assembled with the said annular frame member protrudes outside the side It is formed, above Annular frame member and the filter, so as to correspond to the annular projecting portion, a substantially V-shape as the center is positioned below as viewed from the side, in the case or the annular frame member, and the case In a state where the annular frame member is assembled, a projecting portion that comes into contact with the outer peripheral edge of the annular frame member or the projecting end edge of the annular projecting portion from the outside is integrally projected toward the other side, A gap is formed between the facing surfaces of the annular projecting portion and the annular frame member, and at least one of the annular projecting portion and the annular frame member has a welding rib welded to the other side in the gap portion. It is characterized by projecting toward it.

  In a second invention, in the first invention, the lower end periphery of the case or the annular frame member is assembled to the lower end periphery of the case or the inflow hole inner periphery of the annular frame member. An annular ridge portion located inward from the inner peripheral edge of the inflow hole of the annular frame member is integrally projected toward the other side, and the filter is set between the case and the annular frame member, In the state where the annular frame member is assembled, the outer peripheral side is pressed and deformed by the annular protrusion, and the outer peripheral portion is sandwiched between the case and the annular frame member from the deformed portion.

  In a third invention, in the first or second invention, the welding rib is a first welding rib arranged in parallel from the outer peripheral side to the inner peripheral side in the annular projecting portion of the case or the annular frame member. And the second weld rib, the annular frame member is welded to the case by the first weld rib, and the filter is joined to the case by the second weld rib. It is welded to the case.

  According to a fourth invention, in any one of the first to third inventions, the case is provided with a cylindrical outflow hole forming portion for forming the outflow hole, and the lower end side of the outflow hole forming portion is a case. It protrudes from the inner surface and is close to the filter.

  In the first invention, since the member to be assembled to the lower side of the case is a flat annular frame member, the upper and lower lengths are shortened by the amount that the case lower side member as in Patent Document 1 is not formed into a short cylindrical shape. The whole can be made compact. Further, in the state in which the annular frame member is assembled to the case, the projecting portion comes into contact with the outer peripheral edge of the annular frame member or the projecting end edge of the annular projecting portion, so that the projecting portion, the annular projecting portion, the welding rib, and the annular A closed section is formed by the main body portion of the frame member. Therefore, the cross-sectional rigidity of the assembly part of the case and the annular frame member is increased, and the lowering of the rigidity of the lower part of the oil strainer can be prevented. Further, in the state in which the annular frame member is assembled to the case, the projecting portion comes into contact with the projecting end edge of the annular projecting portion, so that the positioning of the annular frame member with respect to the case in the horizontal direction can be performed reliably. Occurrence of sticking defects can be prevented. In addition, the gap between the distal end side of the annular projecting portion of the case and the outer peripheral side of the annular frame member is closed by the projecting portion in a state where the annular frame member is assembled to the case. The burr can be confined in the gap by the protruding portion so as not to protrude from the case.

  In addition, when the vehicle turns, etc., and the oil level is inclined, the contact area between the oil and the inflow hole becomes larger than the case where the shape around the inflow hole extends only in the horizontal direction. At the same time, the amount of air sucked into the oil strainer can be reduced.

  In the second invention, in the state where the annular frame member and the filter are assembled to the case, the gap between the lower end periphery of the case and the inflow hole inner periphery of the annular frame member is closed with the annular protrusion and the filter. The burr generated at the time of welding can be confined in the gap by the annular protrusion and the filter so as not to enter the hollow portion of the case. Further, since the filter is fixed to the case so that the outer peripheral edge of the filter is pushed into the case side, the filter can be fixed to the case and the annular frame member without loosening.

  In the third invention, since the first welding rib is welded to the annular frame member and the second welding rib is welded to the filter, each of the annular frame member and the filter can be directly fixed to the case, and the annular frame member and the filter case The bonding strength to can be increased.

  In the fourth aspect of the invention, even if the vehicle turns or the like, and the oil level is inclined, the lower end opening of the outflow hole forming portion is difficult to come out on the oil level, so it is sucked into the oil strainer together with the oil. The amount of air can be reduced.

It is a perspective view of the oil strainer which concerns on the reference Embodiment 1 of this invention. It is the disassembled perspective view which turned the oil strainer which concerns on reference Embodiment 1 upside down. It is the perspective view which looked at some annular frame members concerning reference embodiment 1 from the inside. It is the perspective view which looked at a part of lower end peripheral edge of the case concerning the reference embodiment 1 from the inside. FIGS. 2A and 2B are cross-sectional views taken along line A-A in FIG. 1, in which FIG. 1A illustrates a state before the annular frame member is welded to the case, and FIG. It is a BB line sectional view of Drawing 1, (a) shows the state before welding an annular frame member to a case, and (b) shows the state after welding an annular frame member to a case. FIG. 4 is a view corresponding to FIG. 3 according to Reference Embodiment 2 of the present invention. FIG. 5 is a view corresponding to FIG. 4 according to Reference Embodiment 2 of the present invention. FIG. 6 is a view corresponding to FIG. 5 according to Reference Embodiment 2 of the present invention. FIG. 4 is a view corresponding to FIG. 3 according to Reference Embodiment 3 of the present invention. FIG. 5 is a view corresponding to FIG. 4 according to Reference Embodiment 3 of the present invention. FIG. 7 is a view corresponding to FIG. 6 according to Reference Embodiment 4 of the present invention. FIG. 2 is a view corresponding to FIG. 1 according to the first embodiment of the present invention. FIG. 3 is a view corresponding to FIG. 2 according to Embodiment 1 of the present invention. It is CC sectional view taken on the line of FIG. 13, and shows the state before welding an annular frame member to a case. It is CC sectional view taken on the line of FIG. 13, and shows the state after welding an annular frame member to a case. It is the DD sectional view taken on the line of FIG. 13, and shows the state before welding an annular frame member to a case. FIG. 6 is a view corresponding to FIG. 5 according to Reference Embodiment 5 of the present invention. FIG. 6 is a view corresponding to FIG. 6 according to Reference Embodiment 5 of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.
<< Reference Embodiment 1 of the Invention >>
FIG. 1 shows an oil strainer 1 according to a first embodiment of the present invention. Although not shown, the oil strainer 1 is arranged inside an oil pan below the engine of the vehicle and constitutes a part of the lubrication path of the engine. The oil strainer 1 filters out passing oil to remove impurities such as dust. It has become. 2, 5, and 6 are shown upside down in consideration of the posture when the oil strainer 1 is assembled.

  As shown in FIG. 2, the oil strainer 1 is formed of a resin case 2 having a hollow portion 20 that opens downward and through which oil passes, and a resin-made case that is formed in a flat annular shape and is assembled to the case 2 from below. An annular frame member 3 and a resin filter 4 positioned between the case 2 and the annular frame member 3 are provided.

  The case 2 includes a case body 21 having a flat rectangular shape, and an outflow pipe (outflow hole forming portion) 22 that is substantially L-shaped in a side view and is connected to the substantially upper center of the case body 21. The outflow pipe 22 is formed with an outflow hole 22a that communicates with the hollow portion 20 and allows oil to flow out from the hollow portion 20 into the engine (not shown).

  As shown in FIGS. 4 to 6, an annular projecting portion 23 is formed on the periphery of the lower end of the case body 21 so as to project outward. The annular projecting portion 23 faces the annular frame member 3 in a state where the annular frame member 3 is assembled to the case 2, and the annular projecting portion 23, the annular frame member 3, A gap 5 is formed between the facing surfaces.

  An annular ridge portion 24 is integrally projected from the lower end periphery of the case 2 toward the annular frame member 3, and the annular ridge portion 24 attaches the annular frame member 3 to the case 2. In the assembled state, the annular frame member 3 is positioned inward from the inner peripheral edge of the inflow hole 30.

  As shown in FIGS. 4 to 6, an annular first welding rib 23 a that is welded to the annular frame member 3 protrudes integrally with the outer peripheral edge of the annular projecting portion 23 toward the gap portion 5. Has been. Further, between the annular protrusion 24 of the annular projecting portion 23 and the first welding rib 23a, an annular second welding rib 23b having a substantially triangular cross-section, which is welded to the outer peripheral edge of the filter 4, is provided. Projecting integrally toward the gap 5. In other words, the first protruding rib 23 a and the second welding rib 23 b are arranged in parallel on the annular projecting portion 23 from the outer peripheral side toward the inner peripheral side. The protruding height of the first welding rib 23 a and the second welding rib 23 b is lower than that of the annular protrusion 24. Thereby, when the annular frame member 3 is assembled to the case 2, before the first welding rib 23a contacts the annular frame member 3 and before the second welding rib 23b contacts the filter 4, The gap between the lower end periphery of the case 2 and the inner periphery of the inflow hole 30 of the annular frame member 3 is closed with the annular protrusion 24 and the filter 4 so that the burr generated during welding is surely hollow. Part 20 is not allowed to enter. The protrusion height of the second welding rib 23b is such that when the filter 4 and the case 2 are welded, the filter 4 and the annular protrusion 24 are in contact with the filter 4 and the second welding rib 23b. It is sufficient if the height is such that no gap is formed between them. Further, the protruding height of the first welding rib 23a is such that the annular frame member 3 and the first welding rib 23a are in contact with each other when the annular frame member 3 and the case 2 are welded. The height may be such that no gap is formed between the filter 3 and the filter 4.

  At the protruding end of the first welding rib 23a, as shown in FIG. 5 (a), the filter 4 is set between the case 2 and the annular frame member 3 on the outer peripheral edge of the filter 4 as shown in FIG. A plurality of positioning projections 23c that are in close contact or abutting with each other are provided at predetermined intervals. Therefore, since the filter 4 is fixed at the correct position of the case 2 and the annular frame member 3, the filter 4 is securely gripped by the case 2 and the annular frame member 3 to prevent the assembly failure of the filter 4. be able to.

  The annular frame member 3 includes a frame member body 31 having a plate shape extending in the horizontal direction and having an inflow hole 30 through which oil flows into the hollow portion 20 on the inner side. Are formed with a plurality of notches 31a corresponding to the positioning protrusions 23c. The annular frame member 3 includes a plurality of projecting portions 32 integrally projecting from the outer peripheral edge between the cutout portions 31a of the frame member main body 31 toward the case 2 side. In the state where the annular frame member 3 is assembled, the positioning projection 23c is fitted into the notch 31a, and the protrusion 32 abuts the annular projecting portion 23 from the outside. .

  The filter 4 is made of a resin material in a substantially rectangular plate shape, and has a mesh shape for filtering oil flowing into the hollow portion 20 from the inflow hole 30 in a state assembled to the case 2 and the annular frame member 3. There is no. As shown in FIGS. 2, 5 and 6, the filter 4 is set between the case 2 and the annular frame member 3, and the outer peripheral side of the filter 4 is annular when the case 2 and the annular frame member 3 are assembled. The protrusion 24 is pressed and deformed, and the outer peripheral portion is sandwiched between the case 2 and the annular frame member 3 from the deformed portion. The material of the filter 4 may be steel.

  Next, the assembly of the oil strainer 1 will be described.

  First, as shown in FIG. 2, the case 2 is turned upside down so that the open portion of the lower edge of the case 2 faces upward, and the filter 4 is set so as to cover the opening of the case 2 from above. To do. At this time, the filter 4 is fixed at the correct positions of the case 2 and the annular frame member 3 by the positioning protrusions 23c.

  Next, as shown in FIGS. 5 (a) and 6 (a), when the annular frame member 3 is set with respect to the case 2 and the filter 4 from above, the annular projecting portion 23 becomes the annular frame member 3. And the projecting portion 32 abuts from the outer side of the annular projecting portion 23.

  Thereafter, as shown in FIGS. 5B and 6B, the case 2, the annular frame member 3 and the filter 4 are welded and integrated by an ultrasonic welding method. That is, the case 2 is held by a jig or the like (not shown), a horn (not shown) is brought into contact with the frame member body 31 of the annular frame member 3 from above, and the annular frame member 3 is The first welding rib 23a and the frame member main body 31 are melted by frictional heat, and the second welding is performed by ultrasonically vibrating the horn with a vibrator (not shown) while being pressed against the case 2 side. The rib 23b and the filter 4 are melted by frictional heat, the case 2 and the annular frame member 3 are welded, and the case 2 and the filter 4 are welded. At this time, the filter 4 is deformed by being pressed by the annular ridge 24 on the outer peripheral side, the outer peripheral portion is sandwiched between the case 2 and the annular frame member 3 from the deformed portion, and the filter surface is firmly stretched. Become.

  As described above, according to Reference Embodiment 1 of the present invention, since the member assembled to the lower side of the case 2 is the flat annular frame member 3, the lower side member of the case 2 as in Patent Document 1 is not a short cylinder. As a result, the length of the oil strainer 1 as a whole can be made compact. Further, in the state where the annular frame member 3 is assembled to the case 2, the projecting portion 32 abuts on the projecting end edge of the annular projecting portion 23, so the projecting portion 32, the annular projecting portion 23, and the first welding rib 23 a. In addition, the main body portion of the annular frame member 3 forms a closed cross section. Therefore, the cross-sectional rigidity of the assembly part of the case 2 and the annular frame member 3 is increased, and the lowering of the rigidity of the oil strainer 1 can be prevented. Further, since the projecting portion 32 abuts the projecting end edge of the annular projecting portion 23 in a state where the annular frame member 3 is assembled to the case 2, the horizontal positioning of the annular frame member 3 with respect to the case 2 is ensured. As a result, it is possible to prevent assembly failure. In addition, in the state in which the annular frame member 3 is assembled to the case 2, the gap between the distal end side of the annular projecting portion 23 of the case 2 and the outer peripheral edge side of the annular frame member 3 is closed by the protruding portion 32. Therefore, burrs generated during welding can be confined in the gap 5 by the protrusion 32 so as not to protrude from the case 2.

  Further, in a state where the annular frame member 3 and the filter 4 are assembled to the case 2, the gap between the lower end peripheral edge of the case 2 and the inner peripheral edge of the inflow hole 30 of the annular frame member 3 is defined as the annular protrusion 24 and the filter. 4, the burr generated at the time of welding can be confined in the gap portion 5 by the annular protrusion 24 and the filter 4 so as not to enter the hollow portion 20 of the case 2.

  Further, since the first welding rib 23a is welded to the annular frame member 3 and the second welding rib 23b is welded to the filter 4, each of the annular frame member 3 and the filter 4 can be directly fixed to the case 2, and the annular frame The joint strength of the member 3 and the filter 4 to the case 2 can be increased.

In addition, since the filter 4 is fixed at the correct position of the case 2 and the annular frame member 3, the filter 4 is securely gripped by the case 2 and the annular frame member 3, and the assembly failure of the filter 4 is prevented. Can be prevented.
<< Reference Embodiment 2 of the Invention >>
7 to 9 show a partial structure of the oil strainer 1 according to the second embodiment of the present invention. In the reference embodiment 2, only a part of the structure of the annular frame member 3 is different from that of the reference embodiment 1, and the others are the same as those of the reference embodiment 1. Therefore, only the parts different from the reference embodiment 1 will be described below. This will be described in detail.

  In addition, FIG. 9 is described upside down in consideration of the posture at the time of assembling the oil strainer 1 as in the first embodiment.

  As shown in FIGS. 7 and 9, the annular frame member 3 according to the reference embodiment 2 has a projecting portion 32 projecting from the outer peripheral edge of the frame member main body 31 toward the case 2, and continues in an annular shape. In a state where the annular frame member 3 is assembled to the case 2, the frame member main body 31 at a position corresponding to the positioning projection 23 c is swelled to the opposite side of the case 2 and covers the distal end side of the positioning projection 23 c. Is provided.

  Since the assembly of the oil strainer 1 according to the reference embodiment 2 is the same as that of the embodiment 1, the detailed description is omitted.

  As described above, according to the reference embodiment 2 of the present invention, the same effect as that of the reference embodiment 1 can be obtained, and the annular frame member 3 is positioned in the state in which the annular frame member 3 is assembled to the case 2. Locations corresponding to the projections 23 c are continuous at the cover portion 33, and an open portion is formed in a gap between the projecting end edge side of the annular projecting portion 23 of the case 2 and the outer peripheral edge side of the annular frame member 3. I can not. Accordingly, burrs generated during welding can be reliably confined in the gap 5.

  Further, when the annular frame member 3 is assembled to the case 2, the cover 33 serves as a mark at the time of assembly, so that the alignment between the annular frame member 3 and the case 2 can be easily performed.

Furthermore, since the protrusion 32 projecting from the outer peripheral edge of the frame member main body 31 toward the case 2 is continuous in an annular shape, the rigidity of the lower portion of the oil strainer 1 can be further increased.
<< Reference Embodiment 3 of the Invention >>
10 and 11 show a partial structure of the oil strainer 1 according to the third embodiment of the present invention. In the reference embodiment 3, only a part of the structure of the annular projecting portion 23 of the case 2 and a part of the structure of the annular frame member 3 are different from those of the reference embodiment 2, and the others are the same as the reference embodiment 2. Therefore, only the parts different from the reference embodiment 2 will be described in detail below.

  The annular projecting portion 23 is formed with an extending portion 23d in which an outer peripheral edge at a position where the positioning projection 23c is provided is extended outward, and the first welding rib 23a is provided with the positioning protrusion 23c. It continues along the outer periphery of the said extension part 23d so that the process protrusion 23c may be enclosed. That is, the positioning protrusion 23c is positioned between the first welding rib 23a and the second welding rib 23b.

  The protruding portion 32 of the annular frame member 3 is formed with a bulging portion 32a that bulges outward so as to correspond to the extending portion 23d. The annular frame member 3 is attached to the extended portion 23d of the annular projecting portion 23 from the outer side.

  Since the assembly of the oil strainer 1 according to the reference embodiment 3 is the same as that of the embodiment 2, the detailed description is omitted.

  As described above, according to the reference embodiment 3 of the present invention, the positioning protrusion 23c is not provided on the first welding rib 23a as in the reference embodiments 1 and 2, so that the first welding rib 23a is continuous. Become. Accordingly, the entire circumference of the case 2 and the annular frame member 3 can be welded by the first welding rib 23a, and the annular frame member 3 can be firmly fixed to the case 2.

  Further, when the annular frame member 3 is assembled to the case 2, the extended portion 23d and the bulging portion 32a serve as marks at the time of assembly, so that the alignment between the annular frame member 3 and the case 2 can be easily performed. .

Furthermore, since the protrusion 32 projecting from the outer peripheral edge of the frame member main body 31 toward the case 2 is continuous in an annular shape, the rigidity of the lower portion of the oil strainer 1 can be further increased.
<< Reference Embodiment 4 of the Invention >>
FIG. 12 shows a partial structure of an oil strainer 1 according to Reference Embodiment 4 of the present invention. In the reference embodiment 4, the annular protrusion is formed in a state where the filter 4 is integrally formed so as to cover the inflow hole 30 of the annular frame member 3 and the annular frame member 3 is assembled to the case 2. The only difference from Reference Embodiment 1 is that the strip 24 is integrally projected toward the annular frame member 3 so as to abut on the annular frame member 3 from the inside. Since it is the same as that of the first embodiment, the detailed description is omitted below. In addition, FIG. 12 is described upside down in consideration of the posture at the time of assembly of the oil strainer 1 as in the first embodiment.

  As described above, according to the reference embodiment 4 of the present invention, the gap between the lower peripheral edge of the case 2 and the inner peripheral edge of the annular frame member 3 is formed in the annular shape with the annular frame member 3 assembled to the case 2. The protrusion 24 can be confined in the gap 5 so as not to enter the hollow portion 20 of the case 2. Further, since the filter 4 is formed integrally with the annular frame member 3, the number of parts can be reduced.

Although the filter 4 is made of resin, it may be formed integrally with the annular frame member 3 by using an iron one.
Embodiment 1 of the Invention
13 to 17 show the oil strainer 1 according to the first embodiment of the present invention. Since this embodiment 1 is the same as the reference embodiment 1 except that the shape around the inflow hole 30 of the oil strainer 1 is different from the reference embodiment 1, the same reference numerals are given to the same parts as the reference embodiment 1. Only the different parts will be described in detail. 14 to 17 are illustrated upside down in consideration of the posture when the oil strainer 1 is assembled, as in the first embodiment.

  As shown in FIG. 13, the case main body 21 of the first embodiment is arranged in parallel so as to extend downward from the rectangular plate-shaped upper surface portion 21 a extending in the horizontal direction and from both side edges of the upper surface portion 21 a in the width direction. And a pair of substantially triangular side surfaces 21b in a side view. An annular projecting portion 23 projects outward from the lower edge of the case body 21, and both end portions in the longitudinal direction of the case body 21 in the annular projecting portion 23 are located slightly above the upper surface portion 21 a. It is supposed to be.

  An outflow pipe (outflow hole forming portion) 25 that extends straight up and down is provided substantially at the center of the upper surface portion 21 a, and an outflow hole 22 a that communicates with the hollow portion 20 is formed inside the outflow pipe 22. Has been. And as for the said outflow pipe 22, the lower end side protrudes from the inner surface of the case 2 and is close to the filter 4, so that even if the vehicle turns and the oil level in the oil pan is inclined, Since the lower end opening of the outflow pipe 22 is difficult to come out on the oil level, the amount of air sucked into the oil strainer 1 together with the oil can be reduced.

  A pair of plate-shaped reinforcing ribs 21c extending in the longitudinal direction of the upper surface portion 21a are provided on the lower surface of the upper surface portion 21a so as to protrude downwardly with the outflow pipe 22 interposed therebetween. The protruding height of the reinforcing rib 21c gradually increases toward the center of the upper surface portion 21a, and the reinforcing rib 21c has a substantially triangular shape in side view.

  The annular frame member 3 and the filter 4 are substantially V-shaped so that the center is positioned downward in a side view so as to correspond to the annular projecting portion 23 of the case 2.

  As described above, according to the first embodiment of the present invention, when the vehicle turns or the like and the oil level in the oil pan is inclined, the shape around the inflow hole 30 extends only in the horizontal direction. Since the contact area between the oil and the inflow hole 30 is increased with respect to the case 2 having such a shape, the amount of air sucked into the oil strainer 1 together with the oil can be reduced.

  Moreover, since the protrusion part 32 protrudingly provided by the case 2 side from the outer periphery of the frame member main body 31 is continuing cyclically | annularly, the rigidity of the oil strainer 1 lower part can further be improved.

The filter 4 is substantially V-shaped with the center positioned downward in a side view, but for example, the center is positioned downward and the filter surface is positioned upward from the center toward the outside. It may be a substantially cone or pyramid.
<< Reference Embodiment 5 of the Invention >>
18 and 19 show an oil strainer 1 according to a fifth embodiment of the present invention. Since the reference embodiment 5 is different from the reference embodiment 1 only in the structure of the assembly part, and the other parts are the same as the reference embodiment 1, only the parts different from the reference embodiment 1 will be described in detail below. To do.

  An annular ridge 34 is integrally projected on the inner peripheral edge of the inflow hole 30 of the annular frame member 3 toward the case 2, and the annular ridge 34 connects the annular frame member 3 to the above-described case. In the state assembled to the case 2, the case 2 is positioned inward by the peripheral edge of the lower end.

  On the outer peripheral edge of the annular frame member 3, as shown in FIG. 19, an annular first welding rib 35 a that is welded to the annular projecting portion 23 of the case 2 projects integrally toward the gap portion 5. Has been. Further, between the annular ridge 34 and the first welding rib 35 a, an annular second welding rib 35 b having a substantially triangular cross section welded to the outer peripheral edge of the filter 4 is directed toward the gap 5. Projected as a single unit. The protruding height of the second welding rib 35b is such that when the filter 4 and the annular frame member 3 are welded, the filter 4 and the annular ridge portion are in contact with the second welding rib 35b. It is sufficient that the height is such that no gap is formed between them. Furthermore, the protruding height of the first welding rib 35a is such that when the annular frame member 3 and the case 2 are welded, the case 2 and the filter 4 are in contact with the case 2 and the first welding rib 35a. It is sufficient that the height is such that no gap is formed between them.

  As shown in FIG. 18, the protruding end of the first welding rib 35a is close to or close to the outer peripheral edge of the filter 4 with the filter 4 set between the case 2 and the annular frame member 3. A plurality of positioning projections 35c that are in contact with each other are provided at predetermined intervals.

  A plurality of notches 23 f corresponding to the positioning protrusions 35 c are formed on the projecting end edge of the annular projecting portion 23. The case 2 includes a plurality of projecting portions 26 integrally projecting from the outer peripheral edge between the cutout portions 23f of the annular projecting portion 23 toward the annular frame member 3 side. In the state where the annular frame member 3 is assembled to 2, the positioning projection 35 c is fitted into the notch portion 23 f and the projecting portion 26 contacts the projecting end edge of the annular projecting portion 23 from the outside. It comes to touch.

  Next, the assembly of the oil strainer 1 will be described.

  First, the filter 4 is set so as to cover the inflow hole 30 of the annular frame member 3 from above. At this time, the filter 4 is fixed at the correct position of the case 2 and the annular frame member 3 by the positioning projection 35c.

  Next, as shown in FIGS. 18A and 19A, the case 2 is set on the annular frame member 3 and the filter 4 from above. Then, the annular projecting portion 23 faces the annular frame member 3, and the projecting portion 26 contacts the outer peripheral edge of the annular frame member 3 from the outside.

  Thereafter, as shown in FIGS. 18B and 19B, the case 2, the annular frame member 3, and the filter 4 are welded and integrated by the ultrasonic welding method described above.

  As described above, according to the reference embodiment 5 of the present invention, the annular protrusion 34, the positioning protrusion 35c, the first welding rib 35a, and the second welding rib 35b are provided on the annular frame member 3 side, while the case 2 side is provided. Even if the projecting portion 26 is provided and the case 2 and the annular frame member 3 are assembled, the same effect as in the first embodiment can be obtained.

  In the reference embodiment 5, the cover portion that covers the distal end side of the positioning projection 35c is provided on the annular projecting portion 23 of the case 2 in a state where the case 2 and the annular frame member 3 are assembled. It may be.

  In Embodiment 1 and Reference Embodiments 1 to 5, the case 2 and the annular frame member 3 are assembled by one first welding rib 23a, 35a, and the filter 4 and the annular frame member 3 are assembled by one second welding. Although the ribs 23b and 35b are respectively assembled, at least one or more of the first welding ribs 23a and 35a and the second welding ribs 23b and 35b may be provided for welding.

  When the mesh of the filter 4 is relatively large, when the case 2, the annular frame member 3 and the filter 4 are assembled, the second welding ribs 23b and 35b pass through the filter 4 and the annular projecting portion. 23 or the annular frame member 3, the case 2, the annular frame member 3 and the filter 4 can be assembled without providing the first welding ribs 23a and 35a.

  In addition, the first welding ribs 23a and 35a may have a substantially triangular cross section with a tapered protruding tip side, like the second welding ribs 23b and 35b.

  In addition, the first welding ribs 23a and 35a and the second welding ribs 23b and 35b are aligned from either the annular projecting portion 23 or the annular frame member 3 and project toward the gap portion 5. You may protrude toward the space | gap part 5 from each of the cyclic | annular overhang | projection part 23 and the cyclic | annular frame member 3. FIG. Further, the first welding ribs 23 a and 35 a and the second welding ribs 23 b and 35 b may protrude from both the annular projecting portion 23 and the annular frame member 3 toward the gap portion 5.

  Moreover, in the said Embodiment 1 and Reference Embodiment 1-5, although the oil strainer 1 was joined by ultrasonic welding, the joining method is not restricted to this.

  Further, in Reference Embodiments 2, 3, and Embodiment 1, since the protruding portion 32 protruding from the outer peripheral edge of the frame member main body 31 toward the case 2 is continuous in an annular shape, the rigidity of the lower portion of the oil strainer 1 is increased. It can be further increased.

  In addition, in the said Embodiment 1 and Reference Embodiment 1-5, although the oil strainer 1 which concerns on an engine was demonstrated, the said oil strainer 1 may be provided in power apparatuses, such as a transmission, for example.

  The present invention is suitable, for example, for an oil strainer that removes impurities such as dust from oil circulating inside a power unit in a vehicle.

DESCRIPTION OF SYMBOLS 1 Oil strainer 2 Case 3 Ring frame member 4 Filter 5 Cavity part 20 Hollow part 21 Case main body
21a top surface
21b side part 22 outflow pipe (outflow hole forming part)
22a Outflow hole 23 Annular overhang 23a 1st welding rib 23b 2nd welding rib 23c Positioning projection 24 Annular protrusion 26 Protruding part 30 Inflow hole 32 Protruding part 33 Cover part 34 Annular protrusion 35a First welding rib 35b Second welding rib 35c Positioning protrusion

Claims (4)

A hollow portion of the oil opening downward to pass (20) the case body (21) having, a outlet hole for outflow (22a) and communicating with the oil in the hollow portion (20) from the hollow section (20) A resin case (2);
A resin-made annular frame member (3) formed in a flat annular shape, having an inflow hole (30) for allowing oil to flow into the hollow portion (20) therein, and assembled to the periphery of the lower end of the case body (21 ); ,
A filter (4) that covers the inflow hole (30) and filters oil flowing from the inflow hole (30) into the hollow portion (20);
The case body (21) has a rectangular plate-like upper surface portion (21a) extending in the horizontal direction and a side view in which the case main body (21a) extends in a downward direction from both side edges of the upper surface portion (21a) in the width direction. A pair of substantially triangular side surfaces (21b),
At the lower end periphery of the case body (21), an annular projecting portion that faces the annular frame member (3) in a state assembled with the said annular frame member (3) (23) is formed to project to the outer side,
The annular frame member (3) and the filter (4) are substantially V-shaped so that the center is positioned downward in a side view so as to correspond to the annular projecting portion (23),
In the state where the case (2) and the annular frame member (3) are assembled to the case (2) or the annular frame member (3), the outer peripheral edge of the annular frame member (3) or the annular tension member A protruding portion (26) that comes into contact with the protruding end edge of the protruding portion (23) from the outside is integrally projected toward the other side,
A gap (5) is formed between facing surfaces of the annular projecting portion (23) and the annular frame member (3).
At least one of the annular projecting portion (23) and the annular frame member (3) is provided with welding ribs (23a, 23b, 35a, 35b) that are welded to the other side, projecting toward the gap portion (5). Oil strainer characterized by being made. The oil strainer according to claim 1,
In the state where the case (2) and the annular frame member (3) are assembled to the lower peripheral edge of the case (2) or the inner peripheral edge of the inflow hole (30) of the annular frame member (3), 2) The annular ridges (24, 34) positioned inward from the lower edge of the lower end or the inner periphery of the inflow hole (30) of the annular frame member (3) are integrally projected toward the other side,
The filter (4) is set between the case (2) and the annular frame member (3), and the outer circumferential side of the filter (4) is in the state where the case (2) and the annular frame member (3) are assembled. An oil strainer, wherein the oil strainer is pressed and deformed by the portions (24, 34), and an outer peripheral portion is sandwiched between the case (2) and the annular frame member (3) from the deformed portion. The oil strainer according to claim 1 or 2,
The welding ribs (23a, 23b, 35a, 35b) are arranged in parallel from the outer peripheral side to the inner peripheral side in the annular projecting portion (23) of the case (2) or the annular frame member (3). It consists of 1 welding rib (23a, 35a) and 2nd welding rib (23b, 35b),
In the state where the case (2) and the annular frame member (3) are assembled, the annular frame member (3) is welded to the case (2) by the first welding rib (23a, 35a), and the filter (4) is an oil strainer which is welded to the case (2) by the second welding rib (23b, 35b). An oil strainer according to any one of claims 1 to 3,
The case (2) is provided with a cylindrical outflow hole forming portion (22) that forms the outflow hole (22a).
An oil strainer characterized in that the outflow hole forming portion (22) has a lower end projecting from the inner surface of the case (2) and approaching the filter (4).

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