JP2011045813A - Oil strainer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil strainer at a cheap price in which a large filtering area and a high filtering function are secured. <P>SOLUTION: A filtering part 5 is formed in a bottomed cylinder shape the diameter of which becomes gradually longer toward the opening end side. On the inner face of surrounding wall parts 6 of the filtering part 5, spiral grooves 7 are formed at the prescribed pitch in the center line C direction of the filtering part 5. On the outer face of the surrounding wall parts 6, a large number of vertical grooves 9 are formed on the whole periphery in such a manner that they extend along the generating line of the surrounding wall parts 6 of the filtering part 5. The total of the depth of the spiral groove 7 and the vertical groove 9, d1+d2, is set to be larger than the thickness t of the surrounding wall part 6, penetrating holes 11 penetrating in the diameter direction are formed in many places superimposed over the spiral grooves 7 and the vertical grooves 9, and these penetrating holes 11 are distributed in a mesh shape on the whole surrounding wall parts 6 of the filtering part 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention includes a cylindrical resin main body portion and a resin filter portion disposed inside the main body portion, and the oil is filtered in a process of passing the inside of the main body portion from one end side to the other end side. It is related with the oil strainer which filters by a part.

  In Patent Document 1, a first housing is integrally formed at one end of a cylindrical oil strainer body, and a second housing in which a plate-like filter is formed is assembled to the first housing via a hinge. A resin oil strainer is disclosed.

  In Patent Document 2, an engagement portion is provided in a bag-shaped filter having an open end, and the engagement portion is engaged with the inner surface of the cylindrical oil strainer body, whereby the filter is assembled to the oil strainer body. A resin oil strainer is disclosed.

JP 2002-153712 A JP 2001-120920 A

  However, in Patent Document 1, since the filter is plate-shaped and is provided so as to cover the opening of the oil strainer main body, a large oil filtration area cannot be secured.

  Further, in Patent Document 1, if a gap occurs in the hinge portion due to molding errors or assembly errors of both housings, there is a risk that oil enters and exits from this gap and the filtration function is lowered. Also in Patent Document 2, if a gap is formed between the filter and the oil strainer body inner surface due to molding errors of the filter and the oil strainer body, the oil may enter and exit from the gap and the filtration function may be reduced.

  Furthermore, in Patent Document 2, since the oil strainer body and the filter are configured as separate members, each must be molded with a dedicated mold, which increases the manufacturing cost. Moreover, in patent documents 1, 2, the assembly | attachment operation | work of an oil strainer main body and a filter is required, and the manufacturing cost is also high by this.

  This invention is made | formed in view of this point, and is providing the oil strainer by which the wide filtration area and the high filtration function were ensured at low cost.

  In order to achieve the above object, the present invention is characterized in that the oil strainer is constituted by an integral body of a cylindrical main body portion and a bag-like filtration portion.

  Specifically, the present invention includes a cylindrical resin main body portion and a resin filtration portion disposed inside the main body portion, and oil is supplied from one end side to the other end side of the main body portion. The following solution was taken for an oil strainer that was filtered by a filtration unit during the passage.

  That is, in the first aspect of the present invention, the main body portion is cylindrical, and the filtering portion is formed in a shell-like truncated cone shape or conical shape having an open bottom surface, and the inside of the main body portion is formed. It is divided into one end side and the other end side, and is continuously integrated with the main body at the periphery of the opening end so that the center line is the same as the main body, and a spiral groove is filtered on the outer surface of the peripheral wall of the filter. Are formed at a predetermined pitch in the center line direction of the portion, and on the inner surface of the peripheral wall portion, a number of vertical grooves are formed on the entire circumference so as to extend along the generatrix of the peripheral wall portion of the filtration portion, The total depth of the longitudinal grooves is larger than the thickness of the peripheral wall portion, and through-holes penetrating in the radial direction are formed in a plurality of overlapping portions of the spiral groove and the longitudinal groove, and these are formed in the entire peripheral wall portion of the filtration portion The through holes are distributed in a mesh shape.

  The invention according to claim 2 includes a cylindrical resin main body portion and a resin filtration portion disposed inside the main body portion, and oil is supplied from one end side to the other end side of the main body portion. An oil strainer for filtering by a filtration part in the process of passing, wherein the filtration part is formed in a shell-like truncated cone shape or a conical shape having an open bottom surface, and the inside of the main body part is arranged at one end side and the other end. The peripheral edge of the filter part is integrally formed with the peripheral edge of the opening part at the periphery of the opening end so as to be divided to the side, and spiral grooves are formed at a predetermined pitch in the center line direction of the filter part, A large number of vertical grooves are formed on the outer surface of the peripheral wall portion so as to extend along the generatrix of the peripheral wall portion of the filtration portion, and the total depth of the spiral groove and the vertical groove is larger than the thickness of the peripheral wall portion. A large through hole that penetrates in the radial direction is formed at many points where the spiral groove and vertical groove overlap. Is characterized in that the entire peripheral wall of the filtration unit through holes are distributed in a mesh shape.

  According to a third aspect of the present invention, in the oil strainer according to the first or second aspect, the filtering portion has a bottom wall portion at a non-open end, and the bottom wall portion includes the filtering portion. A large number of pores penetrating in parallel with the center line of each other are formed.

  According to invention of Claim 1 and Claim 2, since the filtration part is formed in the bag shape, compared with the case where it forms in plate shape like patent document 1, the filtration area of oil is ensured widely. be able to.

  Moreover, since the main-body part and the filtration part are integrally continuous, an assembling error when assembling another member does not occur, and there is no possibility that a gap is produced at the assembling location. Therefore, oil does not enter and exit from the assembly location, and the filtration function is improved. Moreover, since the main body part and the filtration part can be formed with a common mold, the mold cost can be reduced as compared with the case where separate molds are used. Furthermore, the assembly process is not required and the number of manufacturing steps is reduced, so that the manufacturing cost can be reduced.

  In addition, since the total thickness of the spiral groove and the longitudinal groove is larger than the thickness of the peripheral wall portion, the spiral groove and the longitudinal groove are formed by molding with a molding die corresponding to the spiral groove and a molding die corresponding to the longitudinal groove. A through-hole penetrating in the radial direction can be formed at a location overlapping with. Therefore, there is no need for a slide mold for forming a through-hole portion to be undercut, and the mold structure can be simplified.

  Moreover, since the mold can be removed from the oil strainer by rotating the mold corresponding to the spiral groove, demolding is easy. In particular, according to the second aspect of the present invention, since the mold to be rotated is on the inner side of the filtration part and does not contact the inner surface of the main body, the mold can be smoothly rotated with a small contact resistance. Easy. Further, since the molding die that contacts the inner surface of the main body at the time of demolding is slid along the longitudinal groove, the sliding contact distance is shorter than when rotating and the inner surface of the main body is hardly damaged.

  According to the second aspect of the present invention, since the mold corresponding to the inner surface of the main body is not rotated, the main body can be formed into a cylindrical shape other than the cylindrical shape.

  According to the third aspect of the present invention, since the oil is filtered also by the bottom wall portion, the filtration area is increased as compared with the case where pores are not provided in the bottom wall portion, thereby reducing the suction resistance.

It is a front view of the oil strainer which concerns on Embodiment 1 of this invention. It is a front view which fractures | ruptures the center cross section and main-body part of the oil strainer which concern on Embodiment 1 of this invention, and shows a filtration part. It is an enlarged view of the surrounding wall part outer surface of the filtration part of the oil strainer which concerns on Embodiment 1 of this invention. It is an enlarged view of the surrounding wall part inner surface of the filtration part of the oil strainer which concerns on Embodiment 1 of this invention. It is a top view of the oil strainer which concerns on Embodiment 1 of this invention. It is sectional drawing in the AA of FIG. FIG. 3 is a diagram corresponding to FIG. 2 of the second embodiment. FIG. 6 is a diagram corresponding to FIG. 5 of the second embodiment. FIG. 7 is a diagram corresponding to FIG. 6 of the second embodiment. It is a disassembled perspective view of the oil strainer which concerns on Embodiment 3 of this invention. It is a perspective view of the oil strainer which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1-6 shows the oil strainer 1 which concerns on Embodiment 1 of this invention. The oil strainer 1 includes a cylindrical resin main body 3, and a shell-shaped truncated cone shape having an open bottom surface, that is, a diameter that gradually increases toward the opening end. A resin filtration part 5 formed in a bottom cylindrical shape is disposed. The filtration part 5 divides the inside of the main body part 3 into an upper end side (downstream side in the oil flow direction) and a lower end side (upstream side in the oil flow direction), and the center line C is shared with the main body part 3. In addition, the opening end portion is integrally continuous with the main body portion 3 at the periphery of the opening end portion so that the opening end portion is located upstream of the counter opening end portion in the oil flow direction.

  A pair of plate-shaped projecting piece portions 17 are integrally projected on the outer periphery on the upper end side of the main body portion 3 in the radially outward direction so as to be positioned on the opposite side by 180 degrees. A bolt insertion hole 19 is formed in each protruding piece 17 so as to penetrate in the plate thickness direction. A metal collar 27 is fitted in each bolt insertion hole 19. A circular annular groove 21 is formed on the upper end surface of the main body 3 over the entire circumference, and a rubber sealing O-ring 23 is fitted in the annular groove 21.

  Furthermore, a pair of semicircular cutouts 25 are formed at the lower end edge of the main body 3 on the opposite side by 180 degrees at a position deviated by 90 degrees with respect to the projecting piece part 17. The bottom surface prevents the lower end side opening of the main body 3 of the oil strainer 1 from being blocked.

  A spiral groove 7 is formed on the inner surface of the peripheral wall portion 6 of the filtration portion 5 from the opening end side to the counter-opening end portion at a predetermined pitch in the direction of the center line C of the filtration portion 5. A large number of vertical grooves 9 are formed on the outer surface so as to extend along the generatrix of the peripheral wall portion 6 of the filtration portion 5. The sum of the depth d1 of the spiral groove 7 and the depth d2 of the longitudinal groove 9 is larger than the thickness t of the peripheral wall portion 6, and is radially arranged at a number of locations where the spiral groove 7 and the longitudinal groove 9 overlap. A penetrating through hole 11 is formed. These through holes 11 have a uniform size and are distributed in a mesh shape on the entire peripheral wall portion 6 of the filtration portion 5. In FIGS. 3 and 4, for convenience, the peripheral wall portion 6 is represented by adding dots to portions where the through holes 11 are not formed.

  As shown in FIGS. 2 and 5, the filtration part 5 has a bottom wall part 13 at the end opposite to the opening, and the bottom wall part 13 penetrates in parallel with the center line C of the filtration part 5. A large number of pores 15 having the same size as the through-holes 11 are formed.

  The oil strainer 1 configured as described above is formed by a molding die corresponding to the inner surface of the filtration part 5 and a molding die corresponding to the outer surface of the filtration part 5, and is removed by rotating the molding die corresponding to the inner surface of the filtration part 5. The mold can be removed by retracting in the mold direction.

  The oil strainer 1 configured as described above is accommodated in an oil pan, and the oil intake port of the engine is tightened by bolting in a state where the metal collars 27 are fitted in both the bolt insertion holes 19 of the protruding piece 17. It is attached to the peripheral part (not shown). In this state, the O-ring 23 is pressed against the bottom surface of the annular groove 21 and the peripheral portion of the oil suction port, so that oil and air can be prevented from entering and leaving. When the engine is driven in this state, the oil in the oil pan is sucked from the lower end side opening of the main body portion 3 and filtered through the through hole 11 or the pore 15 of the filtering portion 5 and flows out from the upper end side. Then, the oil is supplied to the sliding portion of the engine through the oil pump.

  Therefore, according to this embodiment, since the filtration part 5 is formed in a bag shape, it is possible to secure a large oil filtration area compared to the case where it is formed in a plate shape, and the suction of oil by the filtration part 5 Resistance can be reduced.

  Moreover, since the main-body part 3 and the filtration part 5 are integrally continued, the assembly | attachment error at the time of assembling another member does not arise, and there is no possibility that a clearance gap may arise in an assembly location. Therefore, oil does not enter and exit from the assembly location, and the filtration function is improved. Moreover, since the main-body part 3 and the filtration part 5 can be shape | molded with a common shaping | molding die, a die cost can be reduced compared with the case where a separate shaping | molding die is used. Furthermore, the assembly process is not required and the number of manufacturing steps is reduced, so that the manufacturing cost can be reduced.

  Further, since the total thickness of the spiral groove 7 and the longitudinal groove 9 is larger than the thickness of the peripheral wall portion 6, by molding with a molding die corresponding to the spiral groove 7 and a molding die corresponding to the longitudinal groove 9, A through-hole 11 penetrating in the radial direction can be formed at a location where the spiral groove 7 and the longitudinal groove 9 overlap. Therefore, a slide mold is not required to form the through-hole 11 portion that is an undercut, and the mold structure can be simplified.

  Further, since the mold corresponding to the spiral groove 7 can be rotated to be detached from the oil strainer 1, demolding is easy. Particularly, since the mold to be rotated is inside the filtration part 5 and does not contact the inner surface of the main body part 3, the mold can be smoothly rotated with a small contact resistance. Further, since the molding die that contacts the inner surface of the main body 3 at the time of demolding is slid along the longitudinal groove 9, the sliding contact distance is shorter than when the molding die is rotated, and the inner surface of the main body 3 is damaged at the time of demolding. Hateful.

  Moreover, since the diameter of the filtration part 5 becomes gradually longer toward the opening end part side, the screwing between the forming die corresponding to the spiral groove 7 and the filtering part 5 is removed at a small number of rotations of the forming die, and thereafter Since the mold can be removed from the filtering part 5 by retreating the mold in the mold release direction, the mold release is easy.

  Furthermore, since oil is filtered also by the bottom wall part 13, a filtration area becomes large compared with the case where a pore is not provided in the bottom wall part 13, and this can make suction | inhalation resistance small.

(Embodiment 2)
7-9 shows the oil strainer 1 which concerns on Embodiment 2 of this invention. Moreover, in Embodiment 2, although drawing corresponding to FIG.3 and FIG.4 of Embodiment 1 is abbreviate | omitted, FIG. 3 shows the surrounding wall part 6 inner surface of the filtration part 5 of the oil strainer 1 which concerns on this Embodiment 2. FIG. FIG. 4 shows the outer surface of the peripheral wall portion 6 of the filtration portion 5 of the oil strainer 1 according to the second embodiment. In the second embodiment, the spiral groove 7 is formed on the outer surface of the peripheral wall 6 of the filtration part 5, and the vertical groove 9 is formed on the inner surface of the peripheral wall 6. Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted. In the second embodiment, the same effect as in the first embodiment can be obtained.

  However, among the molds used for molding the oil strainer 1 according to the second embodiment, the mold corresponding to the outer surface of the filtration part 5 corresponds to the spiral groove 7, and the mold corresponding to the inner surface of the filter part 5 corresponds to the vertical groove 9. Since it corresponds, at the time of mold removal, the shaping | molding die corresponding to the filtration part 5 outer surface is rotated and it is made to retract in a mold release direction.

(Embodiment 3)
10 and 11 show an oil strainer 1 according to Embodiment 3 of the present invention. In the third embodiment, the oil strainer 1 is configured by connecting a first conduit 31 and a second conduit 33 to each other. Since the 1st conduit | pipe 31 is provided with the main-body part 3 and the filtration part 5, and has the same shape as the oil strainer 1 of Embodiment 1 or 2, it attaches | subjects the same code | symbol about the same structure, and its Description is omitted. A pair of arc-shaped flange portions 37 that extend along the lower edge and face each other are integrally formed on the lower end of the main body portion 3 of the first conduit 31 so as to project outward in the radial direction. However, the cutout portion 25 is not formed in the first conduit 31.

  On the other hand, the second conduit 33 includes a tubular main body 39 that is curved in a substantially U-shape, and a plate-like flange portion 41 is disposed on the upper end edge of the tubular main body 39 in the radially outward direction. It is overhanging and formed integrally. On the upper surface of the flange portion 41, a pair of arc-shaped projecting portions 43 extending along the outer peripheral edge are provided so as to correspond to the gap between the flange portions 37 of the first conduit 31. In addition, a cylindrical insertion portion 45 that protrudes from the inside to the main body portion 3 of the first conduit 31 projects from the radially inner side of the protruding portion 43 of the flange portion 41. In addition, a pair of semicircular cutouts 47 are formed 180 degrees opposite to the lower end edge of the main body 39 of the second conduit 33, and the bottom surface of the oil pan is the bottom of the main body 39 of the second conduit 33. The lower end side opening is blocked.

  Then, as shown in FIG. 11, the cylindrical insertion portion 45 of the second conduit 33 is inserted into the lower end side opening of the main body portion 3 of the first conduit 31, and the protrusion 43 of the second conduit 33 is connected to the flange of the first conduit 31. The first conduit 31 and the second conduit 33 are welded to each other in this state.

  In the first to third embodiments, the diameter of the main body 3 is constant. However, if the diameter is not narrower on the opening end side than the anti-opening end side of the filtering unit 5, it is constant. It does not have to be.

  In the first and second embodiments, the filtering part 5 is formed in a bottomed cylindrical shape whose diameter gradually increases toward the opening end side. However, the filtering part 5 may be formed in a shell-like conical shape having an open bottom surface. Good.

  Moreover, in the said Embodiment 1, since the shaping | molding die corresponding to the main-body part 3 inner surface and the filtration part 5 outer surface is not rotated, the centerline of the main-body part 3 and the filtration part 5 does not need to correspond, Furthermore, a main-body part 3 may be formed in a cylindrical shape other than the cylindrical shape.

  Moreover, in the said Embodiment 1-3, although the opening edge part of the filtration part 5 was located in the oil flow direction upstream rather than the counter opening edge part, you may make it locate in the oil flow direction downstream.

  The present invention includes, for example, a cylindrical resin main body portion and a resin filtration portion disposed inside the main body portion, and a process of allowing oil to pass through the main body portion from one end side to the other end side. It is useful as an oil strainer for filtering through a filtration part.

1 Oil strainer
3 Body
5 Filtration part
6 peripheral wall
7 Spiral groove
9 Vertical groove
11 Through hole
13 Bottom wall
15 pores
C center line

Claims (3)

A cylindrical resin main body part and a resin filter part disposed inside the main body part are provided, and the oil is filtered by the filter part in the process of passing the inside of the main body part from one end side to the other end side. An oil strainer,
The filtration part is formed in a shell-like truncated cone shape or conical shape with an open bottom, and the inside of the main body part is divided into one end side and the other end side, and a center line is shared with the main body part. So as to be continuous with the main body at the periphery of the opening end,
A spiral groove is formed at a predetermined pitch in the direction of the center line of the filtration part on the outer surface of the peripheral wall part of the filtration part, and a number of vertical grooves are formed along the generatrix of the peripheral wall part of the filtration part on the inner surface of the peripheral part. Formed around the entire circumference,
The total depth of the spiral groove and the longitudinal groove is larger than the thickness of the peripheral wall portion, and through-holes penetrating in the radial direction are formed in a number of locations where the spiral groove and the longitudinal groove overlap, and the peripheral wall of the filtration portion An oil strainer characterized in that these through holes are distributed in a mesh shape throughout the part. A cylindrical resin main body portion and a resin filtration portion disposed inside the main body portion, and the oil is filtered by the filtration portion in the process of passing the inside of the main body portion from one end side to the other end side. An oil strainer,
The filtering part is formed in a shell-like truncated cone shape or a conical shape having an open bottom surface, and is formed in the main body part at the periphery of the opening end part so as to divide the inside of the main body part into one end side and the other end side. Continuous together,
A spiral groove is formed at a predetermined pitch in the center line direction of the filtration part on the inner surface of the peripheral part of the filtration part, and a number of vertical grooves are formed along the generatrix of the peripheral wall part of the filtration part on the outer surface of the peripheral part. Formed around the entire circumference,
The total depth of the spiral groove and the longitudinal groove is larger than the thickness of the peripheral wall portion, and through-holes penetrating in the radial direction are formed in a number of locations where the spiral groove and the longitudinal groove overlap, and the peripheral wall of the filtration portion An oil strainer characterized in that these through holes are distributed in a mesh shape throughout the part. In the oil strainer according to claim 1 or 2,
The filtration part has a bottom wall part at the end opposite to the opening,
An oil strainer characterized in that a large number of pores penetrating in parallel with the center line of the filtration part are formed in the bottom wall part.

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