JP2012163075A - Structure of oil strainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide structure of an oil strainer decreasing suction resistance of engine oil as low as possible and reducing the risk of clogging of a filter unit, even if the oil strainer is approximately cranked, in structure of oil strainer in which the filter unit is mounted to the inside thereof.SOLUTION: The oil strainer 1 formed to be approximately cranked includes: an inlet pipe part 11 vertically extended inside an oil passage part 4; a strainer body part 12 extended from an upper end of the inlet pipe part in an approximately horizontal direction; and an outlet pipe part 13 extended upward from the outer end of the strainer body part. The filter unit F is assembled from an insertion opening part 15 of an outer end part of the strainer body part 12.

Description

  The present invention relates to the structure of an oil strainer attached to the inside of an oil pan below the engine, and more particularly to the structure of an oil strainer in which a filter unit for filtering engine oil is attached.

  Conventionally, an oil strainer that guides engine oil to an oil pump is provided in an oil pan below the engine. In general, a filter unit for removing foreign matters is incorporated in the oil strainer to filter engine oil.

  However, a baffle plate is provided in the oil pan to receive the return oil after engine lubrication while suppressing the scattering and deviation of the engine oil. This baffle plate and oil strainer are used to reduce the number of parts. An integrated one is known from Patent Document 1 below.

  Further, in Patent Document 2 below, an inflow pipe portion having an oil suction port and an outflow pipe portion having an oil discharge port are laterally offset, and a strainer main body portion is provided between the inflow pipe portion and the outflow pipe portion. An oil strainer that is bent in a substantially crank shape that is connected by the above is disclosed.

  When the oil strainer is bent in a substantially crank shape in this way, there is a problem of how to assemble the filter unit to the oil strainer. However, in Patent Document 2, the strainer body portion on the inflow pipe portion side (upstream side) There has been proposed a structure in which an insertion opening is opened in a bent portion, a filter unit is inserted from the insertion opening, and the filter unit is assembled.

  Furthermore, this patent document 2 also discloses an oil strainer integrated with a baffle plate in the fourth embodiment.

JP 2002-364325 A JP 2009-11960 A

  By the way, when the return oil is received by the baffle plate and guided into the oil pan, an oil passage portion extending downward from the baffle plate is formed, and the layout for guiding the return oil to the lower portion of the oil pan by the oil passage portion is provided. Conceivable.

  In order to improve the fuel efficiency of the engine, the oil strainer suction port may be laid out in the oil passage portion so that the return oil is immediately sucked up by the oil pump.

  The inventors of the present invention have studied a structure in which a baffle plate and an oil strainer are integrated in consideration of a request for reducing the number of parts, for example, in such a layout.

  In considering this integrated structure, for example, it is conceivable to adopt the concept of an oil strainer structure as in the fourth embodiment of Patent Document 2. However, in this structure, the filter unit is arranged in the bent portion of the strainer main body portion on the inflow pipe portion side because the filter unit is inserted from the inflow pipe portion side (upstream side) of the strainer main body portion. Therefore, there arises a problem that the engine oil is more resistant to flow at the bent portion where the flow resistance is large.

  Also, as described above, when the return oil is configured to be sucked up immediately, the engine oil is contaminated, so large foreign matter is likely to be mixed in, and the foreign matter directly contacts the inflow pipe side of the filter unit. In addition, since the filter unit is easily clogged, there is a problem that the flow resistance increases. Here, “direct contact” means that engine oil and foreign matter flowing in the inflow pipe portion directly contact the filter unit in the flow direction of the inflow pipe portion.

  The present invention has been made in view of such a point, and the object of the present invention is to provide an engine with an oil strainer having a filter unit mounted therein, even if the oil strainer is bent in a substantially crank shape. An object of the present invention is to provide an oil strainer structure capable of reducing flow resistance by reducing oil suction resistance as much as possible and eliminating intensive clogging in the vicinity of a bent portion of a filter unit.

  In order to achieve the above object, a first invention is a structure of an oil strainer which is integrally provided on a baffle plate installed in an oil pan and guides engine oil stored in the oil pan to an oil pump. A substantially cylindrical oil passage portion extending in the vertical direction is provided at a predetermined position of the baffle plate to guide the engine oil received by the baffle plate to the lower portion of the oil pan. An inflow pipe portion having an oil suction port in the lower portion, a strainer body portion extending laterally from the upper portion of the inflow tube portion toward the outside of the oil passage portion, and an upper portion from the outer portion of the strainer body portion. An outflow pipe section extending in the direction and having an oil discharge port at the top, and a filter unit for filtering engine oil located inside the strainer main body section The provided, on the outside portion of the strainer body portion, and a configuration in which insertion opening for inserting the filter unit is characterized in that provided.

  The “filter unit” here may be a component having a filter function, and the filter shape, the number of components, and the like are not particularly limited.

  According to a second invention, in the first invention, the filter unit includes a bottomed cylindrical three-dimensional filter main body, and the three-dimensional filter main body is inserted into an inner wall of the strainer main body portion at a predetermined position. A locking fixing portion is provided on the extension line of the inflow pipe portion so that the three-dimensional filter main body is not positioned when fixed to the inflow pipe portion.

  According to a third aspect, in the second aspect, the filter unit includes a lid member that seals the insertion opening, and the three-dimensional filter body is inserted into the lid member and fixed at a predetermined position. In this case, a pressing support portion is provided to define that the three-dimensional filter main body is not positioned on the extension line of the outflow pipe portion.

  According to a fourth invention, in the first to third inventions, the strainer main body passes through the baffle plate, and the insertion opening is located below the baffle plate. It was.

  According to the first invention, the inflow pipe portion extending in the vertical direction inside the oil passage portion, the strainer main body portion extending in the lateral direction toward the outside of the oil passage portion, and the outflow pipe portion extending in the upward direction are substantially A crank-shaped oil strainer is constructed. And a filter unit is assembled | attached from the insertion opening part of the outer side part of a strainer main-body part.

  For this reason, the filter unit is located on the outer side of the strainer main body, and since there is no filter or the like in the bent portion that first becomes flow resistance, the engine oil suction resistance can be reduced as much as possible. Also, direct contact between the filter unit and the foreign matter can be prevented. Also, “direct contact” here means that engine oil and foreign matter flowing through the inflow pipe portion directly contact the filter unit in the flow direction of the inflow pipe portion. The same applies to the following.

  Therefore, in the structure of the oil strainer in which the filter unit is installed inside, even if the oil strainer is bent in a substantially crank shape, the suction resistance of the engine oil is reduced as much as possible, and in the vicinity of the bent portion of the filter unit. Flow resistance can be reduced by reducing intensive clogging.

  According to the second invention, the strainer body is provided by providing the inner wall of the strainer body with the locking and fixing portion that defines the bottomed cylindrical three-dimensional filter body so as not to be located on the extension line of the outflow pipe portion. Therefore, the three-dimensional filter main body is surely not positioned at the bent portion on the inflow pipe portion side of the portion.

  For this reason, when assembling the three-dimensional filter main body to the strainer main body, the assembling work can be performed without much concern about the insertion depth.

  Therefore, the three-dimensional filter main body can be surely not positioned on the extension line on the inflow pipe portion side without impairing the assembling workability of the three-dimensional filter main body.

  According to the third invention, the lid member that seals the insertion opening portion is provided with the pressing support portion that regulates that the three-dimensional filter main body is not positioned on the extension line of the outflow pipe portion. The three-dimensional filter body is not positioned at the bent portion on the tube side. For this reason, it is possible to prevent the three-dimensional filter body from being located at the two bent portions having a large flow resistance.

  Therefore, even if the oil strainer is bent into a substantially crank shape, the three-dimensional filter main body can be prevented from being present at the two bent portions, so that an increase in the engine oil suction resistance can be prevented.

According to the fourth invention, the strainer main body portion penetrates the baffle plate, and the insertion opening is located on the lower side of the baffle plate, so that the assembly operation of the filter unit is not hindered. The inclination angle can be freely set. That is, if the strainer body does not penetrate the baffle plate, it is necessary to determine the inclination angle of the baffle plate while securing the assembly space for the filter unit above the baffle plate. When penetrating, the inclination angle of the baffle plate can be freely determined without considering such an installation space.

  Therefore, the inclination angle of the baffle plate can be freely set without deteriorating the workability of assembling the filter unit to the strainer body.

It is the whole perspective view which made a section the section in the state where the oil strainer concerning Embodiment 1 of the present invention was assembled in the oil pan. In Embodiment 1 of this invention, it is a perspective view of the partial cross section which shows the oil strainer integrated with the baffle fret. In Embodiment 1 of this invention, it is a top view of the state which assembled | attached the oil strainer in the oil pan. It is sectional drawing corresponded in the AA arrow of FIG. It is a perspective view of the three-dimensional filter main body and lid member of Embodiment 1 of the present invention. It is the perspective view which looked at the solid filter main body and cover member of Embodiment 1 of this invention from another direction. It is sectional drawing of the oil strainer which concerns on Embodiment 2 of this invention. It is a perspective view of the three-dimensional filter main body and lid member of Embodiment 2 of the present invention. It is the perspective view which looked at the three-dimensional filter main body and cover member of Embodiment 2 of this invention from another direction.

  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 is an overall perspective view of the oil strainer 1 according to Embodiment 1 of the present invention assembled in an oil pan 2. The oil pan 1 is installed at a lower portion of an engine (not shown) and stores engine oil E (see FIG. 4) inside as is well known.

  The oil pan 1 is composed of a resin injection molded product composed of a deformed substantially rectangular bottomed cylindrical body, and has a bottom wall portion 21 that swells downward and a plurality of portions extending upward from the bottom wall portion 21. Side wall parts 22 and 22 are provided.

  And the attachment flange 23 is provided in the upper end of the side wall part 22 so that the perimeter may be surrounded, as shown in FIG. The mounting flange 23 is provided with a plurality of bolt insertion holes 24 for fastening and fixing the oil pan 2 to a cylinder block of an engine (not shown).

  Inside the oil pan 2, a resin baffle plate 3 that suppresses scattering and deviation of the engine oil E is provided. The baffle plate 3 is mounted on the oil pan 2 with a mounting member (not shown) by placing an outer end 31 on the step 25 adjacent to the mounting flange 23 described above.

  As shown in FIG. 3, the baffle plate 3 is positioned so as to cover the entire surface of the oil pan 2, for example, and receives the return oil dripping from a cylinder block of an engine (not shown), and is an oil passage provided substantially at the center It is configured to lead to part 4. In particular, a substantially bowl-shaped oil receiving recess 32 is formed at a location where there is a large amount of return oil, so that the return oil is more reliably guided to the oil passage portion 4.

  The baffle plate 3 has a substantially horizontal plate shape, but is slightly inclined so that the return oil flows toward the oil passage portion 4 provided at a substantially central position thereof.

  As shown in FIGS. 2 and 3, the oil passage portion 4 is configured by a substantially cylindrical tubular portion extending downward from the baffle plate 3. The oil passage portion 4 guides return oil to the upper surface 21a (see FIG. 1) (hereinafter referred to as the bottom surface of the oil pan) of the bottom wall portion 21 of the oil pan 2.

  A substantially cylindrical partition wall body 5 is engaged and disposed on the outer peripheral side of the oil passage portion 4. The partition wall body 5 is configured to slide up and down along the oil passage portion 4, but detailed description thereof is omitted.

  The baffle plate 3 is integrally provided with an oil strainer 1 for guiding engine oil E (see FIG. 4) stored in the lower part of the oil pan 2 to an oil pump (not shown).

  Next, the structure of the oil strainer 1 will be described in detail.

  As shown in FIG. 4, the oil strainer 1 of this embodiment includes an inflow pipe portion 11 extending in the vertical direction inside the oil passage portion 4, a strainer main body portion 12 extending substantially horizontally from the upper end, and an outer portion thereof. An outflow pipe portion 13 extending upward from the end is provided, and is bent in a substantially crank shape. In addition, a filter unit F (resin three-dimensional filter main body 6 and lid member 7), which will be described later, is inserted into the strainer main body 12 and fixed at a predetermined position. In addition, the direction shown by the arrow in the figure is the flow direction of the engine oil E.

  First, the inflow pipe portion 11 is formed of a cylindrical resin pipe, and is arranged so as to extend in the vertical direction at a substantially central position (see FIG. 3) in the cylindrical oil passage portion 4 as described above. is doing.

  An oil suction port 14 is formed at the lower end of the inflow pipe portion 11. The oil suction port 14 is opened near the bottom surface 21a of the oil pan 2 so as to face the bottom surface 21a, and is configured to suck up engine oil E stored in the lower portion of the oil pan 2.

  The reason why the inflow pipe portion 11 is arranged in the oil passage portion 4 is that the return oil and the engine oil E heated by the return oil are immediately used for engine lubrication, so that the temperature rise of the entire engine is promoted. This is because the warm-up operation time can be shortened and the fuel efficiency of the engine can be improved.

  However, the return oil returns to the oil pan 2 together with foreign matters such as dirt and chips in the engine. For this reason, there is a concern that large foreign matter is likely to be mixed into the engine oil E sucked from the oil suction port 14, and the function of the filter unit F becomes important. The filter unit F will be described in detail later.

  Next, the strainer body 12 is formed of a cylindrical resin pipe, extends substantially horizontally from the upper end of the inflow pipe 11, and extends to the vicinity of the outer end 31 of the baffle plate 3. The strainer body 12 is provided with an insertion opening 15 at the outer end thereof.

  The insertion opening 15 is a circular opening for inserting the filter unit F, and the filter unit F is inserted into the strainer body 12 by inserting the filter unit F from the insertion opening 15. Yes.

  The inner wall surface 12a of the strainer body 12 is provided with a locking and fixing portion 16 (hereinafter referred to as a locking and fixing step portion 16) in which the inner wall surface 12a is formed one step smaller. The locking and fixing step 16 is formed on the extension line L1 of the inflow pipe portion 11 at a position outside the extension line L1 (downstream position) of the inflow pipe portion 11 so that the filter unit F does not exist. Yes.

  In addition, the strainer body 12 is formed so that its outer position (downstream position) is slightly lowered and disposed so as to penetrate the baffle plate 3. The insertion opening 15 is configured to be positioned below the baffle plate 3. In this way, the strainer body 12 passes through the baffle plate 3 and the insertion opening 15 is on the lower side of the baffle plate 3, so that the installation space for the filter unit F needs to be set on the upper side of the baffle plate 3. Therefore, the inclination angle of the inclined surface of the baffle plate 3 can be freely determined. And since the assembly space of the filter unit F can be set below the baffle plate 3, the assembly workability | operativity of the filter unit F is not deteriorated.

  The outflow pipe portion 13 is formed of a cylindrical resin pipe, extends upward from the outer end of the strainer main body portion 12, and extends toward an oil pump (not shown). An oil discharge port 17 is formed at the upper end of the outflow pipe portion 13. The oil discharge port 17 is configured to discharge the engine oil E guided by the oil strainer 1 to the oil pump side.

  Next, the filter main body 6 and the lid member 7 as the filter unit F will be described with reference to FIGS. 5 and 6.

  As described above, the filter unit F is composed of two parts, the resin-made three-dimensional filter main body 6 and the resin-made lid member 7.

  The filter main body 6 has a bottomed hexagonal cylindrical mesh portion 61 and an annular cylindrical portion 62, the longitudinal length t1 is shorter than the length Ht of the strainer main body portion 12, and the diameter d0 is the strainer main body portion 12. The diameter is set to be the same as or slightly smaller than the inner diameter Hd. By setting in this way, the filter main body 12 can be inserted into the strainer main body 12 without a gap.

  The inner diameter d1 of the mesh portion 61 is set to be smaller than the inner diameter Hd of the strainer main body portion 12. By setting in this way, a clearance is provided between the inner peripheral wall 12a of the strainer body 12 and the mesh portion 61 so as to reduce the flow resistance of the filtered engine oil E.

  The mesh portion 61 is provided with a fine opening 61a on the entire surface, and is configured to filter the engine oil E flowing through the oil strainer 1. As shown in FIG. 6, a reinforcing portion 64 reinforced in a beam shape is provided on the bottom surface 63 of the mesh portion 61, and a concave engaging portion 65 recessed in a hexagonal shape is provided at the center of the reinforcing portion 64. .

  The annular cylindrical portion 62 is formed to have a diameter d0 such that the upstream outer end 62a comes into contact with and engages with the aforementioned locking and fixing step portion 16 (see FIG. 4). 6 is configured to be locked and fixed to the locking and fixing step 16.

  And as shown in FIG. 5, the welding taper surface 66 which slightly inclined the surface in the taper shape is formed in the outer end of the cyclic | annular cylinder part 62. As shown in FIG. By forming the welding tapered surface 66, the filter main body 6 is formed at the outer peripheral corner portion of the locking and fixing step portion 16 by frictional heat only by rotating the filter main body 6 from the insertion opening 15 side. It can be welded and fixed to the inclined surface 16a.

  The lid member 7 has a substantially disc-shaped plug head 71 and a pressing shaft portion (pressing support portion) 72 having a predetermined length.

  The pressing shaft portion 72 is configured by, for example, a thin hexagonal column, and the distal end of the pressing shaft portion 72 is configured to fit into the concave engagement portion 65 of the filter body 6.

  The length of the pressing shaft 72 is set to such a length that the filter main body 6 does not exist on the extension line L2 of the outflow pipe portion 13 of the strainer main body 12 (see FIG. 4).

  The plug head 71 has an outer diameter d <b> 2 that substantially matches the diameter Kd of the insertion opening 15, and is configured to be fitted and fixed to the insertion opening 15. Moreover, the fixing collar part 73 protrudes and forms in the outer peripheral end of the stopper head 7, and the welding taper surface 74 inclined in the taper shape is formed in the outer end side surface.

  As shown in FIG. 6, the stopper head 71 is provided with a concave pressing portion 75 that is recessed in a hexagonal shape. This concave pressing part 75 is an operation part used when the lid member 7 is assembled in the strainer main body part 12 together with the filter main body 6, and by frictional heat by fitting a hexagonal tool (not shown) and rotating by pressure. The aforementioned welding taper surfaces 66 and 74 are welded.

  In this embodiment, an annular groove 76A is formed on the outer periphery of the stopper head 71, and an annular rubber seal 76 is attached to the groove 76A. By attaching the sealing material 76, the sealing performance of the lid member 7 is enhanced, and the suction of the engine oil E from the insertion opening 15 can be prevented. Note that the sealing material 76 is not necessarily provided.

  In this embodiment, as shown in FIG. 4, the opening 67 of the filter body 6 is installed so as to face the upstream side with respect to the flow direction of the engine oil E. Is configured to remove.

  Since the filter body 6 is assembled so that the opening 67 faces the upstream side in this way, it can be assembled simply by pressing the bottom 63 side of the filter body 6 with one pressing shaft 72 of the lid member 7. The configuration of the lid member 7 can be simplified. Further, since there is only one pressing shaft 72, the flow resistance can be reduced.

  Next, a method for assembling the filter unit F will be described.

  First, the filter body 6 of the filter unit F is inserted into the strainer body 12 from the insertion opening 15. Since the insertion position is determined by the engaging and fixing step 16, it is sufficient to simply insert the insertion work.

  Next, the lid member 7 is inserted from the insertion opening 15. At this time, the pressing shaft 72 is fitted into the concave engagement 65 of the filter body 6. By fitting the pressing shaft portion 72, the position of the filter body 6 is securely fixed.

  Finally, a hexagonal tool (not shown) is fitted to the concave pressing portion 75 of the lid member 7 to perform a pressure rotation operation. By doing so, the lid member 7 and the filter body 6 rotate, the welding taper surface 16a provided at the outer peripheral corner portion of the engagement fixing step portion 16 and the welding taper surface 66 of the filter body 6 come into contact with each other. The welding taper surface 18a formed at the outer peripheral corner of the engagement fixed end 18 provided in the insertion opening 15 and the welding taper surface 74 of the lid member 7 come into contact with each other to generate frictional heat, thereby causing a strainer. It is welded and fixed to the main body 12.

  In this way, when the filter unit F is assembled and the engine oil E flows into the oil strainer 1, as shown in FIG. 4, the bent portion Z1 between the inflow pipe portion 11 and the strainer body portion 12, the strainer Since the filter main body 6 does not exist in the bent portion Z2 between the main body portion 12 and the outflow pipe portion 12, any of the bent portions, the increase in flow resistance can be suppressed and the engine oil E can be sucked.

  In particular, since there is no object at all in the bent portion Z1 between the inflow pipe portion 11 and the strainer main body portion 12, an abrupt increase in suction resistance can be suppressed. Further, even if the engine oil E contaminated with the return oil is sucked, the direct contact between the filter body 6 and the foreign matter can be prevented.

  As described above, in this embodiment, in the substantially strained oil strainer 1, the filter unit F is assembled from the insertion opening 15 at the outer end of the strainer body 12.

  For this reason, when the engine oil E is sucked up, the filter main body 6 or the like does not exist in the bent portion Z1 that first becomes resistance, so that the suction resistance can be reduced as much as possible.

  Even if the oil suction port 14 is disposed in the oil passage portion 4 so as to immediately suck up the return oil and the engine oil E heated by the return oil, the foreign matter in the engine oil E and the filter body 6 Direct contact can also be prevented.

  Therefore, even if the oil strainer 1 is bent into a substantially crank shape, the suction resistance of the engine oil E can be reduced as much as possible, and the possibility of clogging of the filter body 6 can be reduced.

  In this embodiment, the filter body 6 can be surely not positioned at the bent portion Z1 on the inflow pipe portion 11 side by providing the locking and fixing step portion 16 on the inner wall surface 12a of the strainer body portion 12. . For this reason, when assembling the filter main body 6 to the strainer main body 12, the assembling work can be performed without worrying about the insertion depth.

  Further, the insertion opening 15 is provided in the vicinity of the outer end of the baffle plate 3. On the contrary, when the insertion opening 15 is provided upstream of the strainer main body 12, that is, on the inflow conduit 11 side, the filter main body 6 is inserted. Therefore, it is necessary to provide a space for the oil passage portion 4 and the baffle plate 3 and the insertion work is not easy. On the other hand, in the present invention, it is the above-described structure, and it is not necessary to provide a space for inserting the filter main body portion 6 and can be easily inserted.

  Therefore, the filter main body 6 can be reliably prevented from being positioned on the extension line L1 on the inflow pipe portion 11 side without impairing the assembling workability of the filter main body 6.

  In this embodiment, the position of the filter main body 6 is defined by the locking and fixing step portion 16, but when the filter body 6 is assembled without a gap between the annular cylindrical portion and the inner peripheral surface of the strainer main body portion, it is merely a protrusion. You may make it prescribe | regulate a position with a thing like a part. Further, a spacer or the like may be inserted on the upstream side of the filter body.

  Further, in this embodiment, the strainer is provided by providing the cover member 7 that seals the insertion opening 15 with the pressing shaft portion 72 that defines the filter body 6 not to be positioned on the extension line L2 of the outflow pipe portion 13. The filter main body 6 is not positioned at the bent portion Z2 on the outflow pipe portion 12 side of the main body portion 12. For this reason, it is possible to prevent the filter body 6 from being positioned at the two bent portions Z1 and Z2 having a large flow resistance.

  Therefore, even if the oil strainer 1 is bent into a substantially crank shape, the filter body 6 can be prevented from being present at the two bent portions Z1 and Z2, so an increase in the suction resistance of the engine oil E can be prevented. .

  Moreover, in this embodiment, since the strainer main-body part 12 penetrates the baffle plate 3, and the insertion opening part 15 is located in the lower side of the baffle plate 3, it does not inhibit the assembly | attachment operation | work of the filter unit F. The inclination angle of the baffle plate 3 can be freely set. That is, when the strainer body 12 passes through the baffle plate 3, it is not necessary to consider the assembly space of the filter unit F above the baffle plate 3, so the inclination angle of the baffle plate 3 can be freely determined. Can do.

  Therefore, the inclination angle of the baffle plate 3 can be freely set without deteriorating the workability of assembling the filter unit F to the strainer body 12.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, about the component similar to Embodiment 1, the same number is attached | subjected and description is abbreviate | omitted.

  In the second embodiment, the opening 167 of the filter body 106 is configured to face the downstream side (the insertion opening 15 side). That is, the filter body 6 is assembled in the opposite direction to that of the first embodiment.

    First, a locking and fixing step 116 for locking and fixing the filter main body 106 is formed on the inner wall surface 12 a of the strainer main body 12 at a position immediately before the outflow pipe portion 17. The locking / fixing step 116 is configured to lock and fix the annular cylindrical portion 162 of the filter body 106.

  The filter main body 106 is also composed of a resin-made bottomed hexagonal cylindrical three-dimensional filter, as in the first embodiment. However, the shape of the annular cylindrical portion 162 is different from that of the first embodiment. As shown in FIG. 8, the mesh portion 161 is formed on the upstream side of the annular cylindrical portion 162, and the hexagonal portion is formed on the downstream side of the annular cylindrical portion 162. An engaging step 163 that is recessed in shape is formed. The engagement step portion 163 is configured to engage with a lid member 107 described later.

  Further, as shown in FIG. 9, an inclined welding taper surface 164 is formed on the outer periphery on the upstream side of the annular cylindrical portion 162. The annular cylindrical portion 162 is configured to be welded to the aforementioned locking and fixing step portion 116 by the welding tapered surface 164.

  As shown in FIG. 9, the mesh portion 161 is provided with fine apertures 161 a not only on the peripheral side surface 165 but also on the bottom surface 166. For this reason, flow resistance can be less than the mesh part 61 of Embodiment 1. FIG.

  On the other hand, unlike the first embodiment, the lid member 107 has a substantially cylindrical gauge shape. An annular operation flange portion 171 is provided on the upstream side, and a disc-shaped plug head portion 172 is provided on the downstream side. And the cover member 107 is comprised by connecting these both with the six connecting rods 173 ... extended in parallel, for example. Since the lid member 107 has a substantially cylindrical gauge shape, the engine oil filtered by the mesh portion 161 is discharged from the outflow pipe portion 17 through the connecting rods 173. can do.

  As shown in FIG. 9, the operation flange portion 171 is provided with a hexagonal protrusion 174 extending toward the filter body 106 side. The protruding portion 174 has a function of rotating the filter body 106 integrally with the lid member 107 by fitting into the engaging step portion 163 of the annular tube portion 162 described above.

  The stopper head 172 has a welding taper surface 175 at the outer peripheral end on the upstream side. As shown in FIG. 7, the stopper head 172 is configured to be welded to the insertion opening 15 by the welding tapered surface 175.

  Furthermore, the stopper head 172 is provided with a concave pressing portion 176 that is recessed in a hexagonal shape as shown in FIG. As in the first embodiment, the concave pressing portion 176 is an operation portion used when the lid member 107 is assembled into the strainer main body portion 12 together with the filter main body 106, and is fitted with a hexagonal tool (not shown) and rotated by pressure. Thus, the welding taper portion 116a formed at the outer peripheral corner portion of the engagement fixing step portion 116, the above-mentioned welding taper surface 164 provided at the annular tube portion 162, and the engagement fixing step portion 118 provided at the insertion opening portion. The welding taper portion 118a formed at the outer peripheral corner portion of the welding head and the above-mentioned welding taper surface 175 provided on the plug head portion 172 are brought into contact with each other and welded by frictional heat.

  Although configured as described above, the second embodiment also has substantially the same operational effects as the first embodiment. That is, since the filter main body 106 does not exist in the bent portion Z1 on the inflow pipe portion 11 side of the strainer main body portion 12, the suction resistance at the bent portion Z1 (see FIG. 7) that first becomes resistance can be reduced as much as possible. . Further, direct contact between the foreign matter in the engine oil E and the filter main body 106 can also be prevented.

  Therefore, even if the oil strainer 1 is bent into a substantially crank shape, the suction resistance of the engine oil E can be reduced as much as possible, and clogging of the filter body 106 can be eliminated at the bent portion Z1.

  In the case of the second embodiment, in particular, since the opening 167 of the filter body 106 is configured to face the downstream side, the engine oil E can be flowed using the mesh portion 161 of the bottom surface 166 of the filter body 106. .

  Therefore, the flow resistance can be further reduced as compared with the oil strainer 1 of the first embodiment. Therefore, the effect of this invention can be exhibited more.

  Although the embodiment has been described above, the present invention may be changed as appropriate without departing from the scope of the object.

  In the above embodiment, the filter unit F is composed of the two parts of the filter main bodies 6 and 106 and the lid members 7 and 107. However, the filter unit F may be composed of a single part in which both are integrated. . Further, the fixing method of the filter unit F is not limited to this embodiment, and may be screw fixing, pin fixing, caulking fixing, or the like, for example. In this case, a sealing member such as the sealing material 76 is required for the lid member.

  In the above embodiment, the oil strainer 1 is described as being integral with the baffle plate 3. However, only the strainer main body of the oil strainer is integrally formed with the baffle plate, and other inflow pipes and outflow pipes are formed. It is also included in the present invention that the oil strainer is integrated by forming the parts separately and assembling them later.

  Further, in the above embodiment, the insertion opening 15 is positioned on the lower side of the baffle plate 3 by providing the strainer main body 12 inclined slightly downward as viewed from the flow direction of the engine oil E. The structure is not limited to this. That is, for example, the substantially flat baffle plate 3 is slightly inclined toward the direction of the oil passage portion 4, but if the angle of this inclination is further increased, the strainer body portion is substantially horizontally oriented in the oil flow direction, Alternatively, it may be provided to be inclined slightly upward. By facing upward in this way, there is an advantage that the bent portion becomes gentle and the flow resistance is further reduced.

  Further, the strainer main body portion may extend along the upper surface or the lower surface of the baffle plate, and one of the inflow pipe portion or the outflow pipe portion may penetrate the baffle plate. Furthermore, the strainer main body may extend so as to protrude from the upper surface side and the lower surface side of the baffle plate, the inflow pipe portion protrudes from the lower surface side, and the outflow tube portion protrudes from the upper surface side.

  The filter body 6 is preferably three-dimensionally shaped as in the above-described embodiment because it is easy to fix to the inner wall surface 12a of the strainer body 12 and has excellent adhesion, but is not limited to this structure. . Further, if the adhesiveness is devised, for example, it is possible to reduce the cost as a flat filter main body.

  In addition, the inflow pipe portion 11 is provided substantially at the center in the oil passage portion 4. However, if the inflow pipe portion 11 is inside the oil passage portion 4, for example, it is formed integrally with the oil passage portion along the inner peripheral surface. May be.

  As described above, the structure of the oil strainer according to the present invention can be applied to an oil strainer in which a filter unit is assembled inside.

F Filter unit 1 Oil strainer 2 Oil pan 4 Oil passage section 6, 106 Filter body 7, 107 Cover member 11 Inflow pipe section 12 Strainer body section 13 Outflow pipe section Z1 Bending section Z2 Bending section

Claims (4)

Structure of oil strainer (1) provided integrally with baffle plate (3) installed inside oil pan (2) and guiding engine oil (E) stored in oil pan (2) to an oil pump Because
At a predetermined position of the baffle plate (3), there is a substantially cylindrical oil passage portion (4) extending in the vertical direction for guiding the engine oil (E) received by the baffle plate (3) to the lower portion of the oil pan (2). Provided,
An inflow pipe portion (11) extending in the vertical direction and having an oil suction port (14) in the lower portion inside the oil passage portion (4);
A strainer body (12) extending laterally from the upper part of the inflow pipe (11) toward the outside of the oil passage (4);
An outflow pipe portion (13) extending upward from the outer side of the strainer body portion (12) and having an oil discharge port (17) at the top;
A filter unit (F) for filtering engine oil (E), located inside the strainer body (12);
The structure of the oil strainer, wherein an insertion opening (15) for inserting the filter unit (F) is provided on the outer side of the strainer main body (12). The filter unit (F) includes a bottomed cylindrical three-dimensional filter body (6),
When the three-dimensional filter main body (6) is inserted into the inner wall (12a) of the strainer main body (12) and fixed at a predetermined position, the three-dimensional filter is placed on the extension line (L1) of the inflow pipe portion (11). The structure of the oil strainer according to claim 1, further comprising a locking and fixing portion (16) for defining the mold filter body (6) so as not to be positioned. The filter unit (F) includes a lid member (7) for sealing the insertion opening (15),
When the three-dimensional filter body (6) is inserted into the lid member (7) and fixed at a predetermined position, the three-dimensional filter body (6) is placed on the extension line (L1) of the outflow pipe portion (13). The structure of the oil strainer according to claim 2, wherein a pressing support portion (72) is provided so as to prevent the position of the pressure support portion from being positioned. The strainer body (12) passes through the baffle plate (3), and the insertion opening (15) is positioned below the baffle plate (3). 3. The structure of the oil strainer according to 3.

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