JP2009000640A - Oil strainer - Google Patents

Abstract

An object of the present invention is to insert and dispose a filter unit having a substantially flat filter and a unit body having a substantially flat plate shape inside a strainer body which is substantially tubular and integrated.
An oil strainer (S1) in which a filter unit (U1) is inserted into a substantially tubular and integral strainer body (B1), and the filter unit has a substantially flat filter (F) and has an overall shape. Comprises a substantially plate-like unit main body 11 and a terminal frame 15 formed along at least a part of the peripheral edge of the upstream terminal portion of the unit main body, and the side surface portion of the unit main body and the outer peripheral portion of the terminal frame are The strainer main body is guided by an inner peripheral portion, and a drop prevention means for preventing the filter unit from falling off is provided between the terminal frame and the strainer main body.
[Selection] Figure 2

Description

  The present invention relates to an oil strainer, and more particularly to an oil strainer in which a filter unit is inserted and disposed in a substantially tubular and integral strainer body.

  2. Description of the Related Art Conventionally, as an oil strainer for a vehicle such as an automobile, for example, as disclosed in Patent Document 1, a strainer body is configured as an integral tubular body, and a filter unit is inserted and held from one end side of the strainer body. It is known that the filter unit is disposed inside the strainer body.

By adopting such a configuration, the strainer body is manufactured as compared with the case where the strainer body is divided into two parts such as a split body and the substantially plate-like filter unit is sandwiched to join the divided bodies (for example, see Patent Document 2). In addition, the process of assembling the filter unit can be greatly simplified.
JP 2001-120920 A JP-A-8-121138

  However, in the oil strainer disclosed in Patent Document 1, in order to allow the filter unit to be inserted from the opening on one end side (upstream side) of the strainer body, the filter has an oil outflow side (downstream side) terminal. Since it is formed in a closed and substantially cylindrical shape, it is difficult to apply when the strainer body is relatively thin, and the structure of the filter unit is complicated and the cost is high.

  Therefore, according to the present invention, a filter unit having a substantially planar filter and having a substantially plate-like unit body can be inserted and disposed inside a substantially tubular and integral strainer body. Providing an oil strainer is a basic objective.

  For this reason, the oil strainer according to the present invention is an oil strainer in which a filter unit is inserted into a substantially tubular and integrated strainer body, and the filter unit has a substantially planar filter. A unit body having a substantially plate-like overall shape, and a terminal frame formed along at least a part of the periphery of the oil inflow side terminal portion of the unit body, and the side surface portion of the unit body and the terminal frame The outer peripheral portion is guided by the inner peripheral portion of the strainer body, and a drop prevention means for preventing the filter unit from dropping is provided between the terminal frame and the strainer body. It is a thing.

  In this case, preferably, a terminal vertical wall that blocks a portion of the internal passage of the strainer body corresponding to the oil outflow side of the filter is formed in the oil inflow side terminal portion of the unit body, and the terminal frame is the terminal frame. It is formed along a part of the peripheral edge of the vertical wall.

  You may comprise at least one part of the said terminal vertical wall with a filter.

  In the above case, it is preferable that the side surface portion of the unit main body is inserted into a groove portion formed in the inner peripheral portion of the strainer main body.

  Further, in the above case, the terminal frame is formed in an annular shape corresponding to the inner peripheral portion of the strainer body, and the entire outer peripheral portion of the annular terminal frame is guided by the inner peripheral portion of the strainer main body. Is more preferable.

  According to the present invention, the side surface portion of the unit main body having a substantially flat filter and the overall shape is substantially plate-shaped and the outer peripheral portion of the terminal frame are guided by the inner peripheral portion of the strainer main body. Since a drop prevention means for preventing the filter unit from falling off is provided between the main bodies, a filter unit having a substantially flat plate-like unit body having a substantially flat filter is provided from the oil inflow side to the strainer. It can be inserted into the body and held in the strainer body without falling off. Accordingly, a strainer having a relatively simple structure having a substantially flat filter-like unit body having a substantially planar filter without complicating the manufacture of the strainer body and the process of assembling the filter unit. Can be incorporated into the body. Further, the present invention can be effectively applied even when the strainer body is relatively thin.

  In this case, preferably, a terminal vertical wall that blocks a portion corresponding to the oil outflow side of the filter in the internal passage of the strainer body is formed in the oil inflow side end portion of the unit body, so that the oil is filtered by the filter. It is possible to reliably prevent leakage to the outflow side without any problems. In addition, in this case, the terminal frame can be formed on the oil inflow side terminal portion of the unit body without any trouble.

  By constituting at least a part of the terminal vertical wall with a filter, the filtration area of the filter unit can be increased.

  In the above case, the insertion of the filter unit into the strainer body can be performed more easily and reliably, preferably by inserting the side surface portion of the unit body into the groove formed in the inner peripheral portion of the strainer body. Further, the filter unit can be held more stably in the strainer body.

  In the above case, more preferably, the terminal frame is formed in an annular shape corresponding to the inner periphery of the strainer body, and the entire outer periphery of the annular terminal frame is guided by the inner periphery of the strainer body. Thus, the holding state of the filter unit in the strainer body can be further stabilized.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a front view of an oil strainer according to the first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the oil strainer along the line Y2-Y2 in FIG. 1, and FIG. 3 is a line Y3-Y3 in FIG. FIG. 4 is an explanatory view showing an enlarged main portion of FIG. 3, and FIG. 5 is a perspective view of a filter unit incorporated in the oil strainer.

  As can be seen from FIGS. 1, 2 and 3, the oil strainer S <b> 1 according to the present embodiment is tubular and is configured by disposing a filter unit U <b> 1 inside the strainer body B <b> 1. The oil strainer S1 is used, for example, disposed on the upper side of an oil pan attached to an engine or transmission of an automobile, and the upper portion of the strainer body B1 is bent slightly diagonally, and oil is applied to the tip (upper end) thereof. The outflow side (downstream side) connecting flange 2 is integrally formed. The oil is sucked upward from obliquely downward in FIGS. 1, 2 and 3 (see broken line arrow c in FIG. 2).

  The strainer body B1 is preferably a tubular body having a substantially rectangular cross-section, and more preferably is integrally formed by using, for example, an injection molding method using a synthetic resin material, and the filter unit U1 is an oil inflow side of the strainer body B1. (Upstream side) It is incorporated in the strainer body B1 by being inserted from the opening 3 along the longitudinal axis.

  As shown in FIGS. 3, 4, and 5, the filter unit U <b> 1 includes a unit main body 11 having a plane mesh filter F having a predetermined mesh and having an overall plate shape. The outer periphery of the filter F is supported by a frame-shaped filter frame 12, and a large number of crosspieces 13 are provided inside the filter frame 12 in a grid pattern to reinforce the substantially planar filter F.

  A frame body 15 (terminal frame) is formed on the oil inflow side (upstream side) terminal portion of the unit main body 11 along at least a part of the peripheral edge thereof. More specifically, in this embodiment, the upstream end portion of the unit main body 11 includes a wall portion 14 (terminal vertical wall that blocks a portion corresponding to the oil outflow side of the filter F in the internal passage of the strainer main body B1. ), And a plate-like terminal frame 15 is formed so as to protrude upstream along a part of the peripheral edge of the terminal vertical wall 14 (the lower edge and the left and right side edges in FIG. 5). Yes. The entire filter unit U1 is preferably integrally formed by using, for example, an injection molding method using a synthetic resin material. The filter F portion may be made of a metal mesh, and the filter frame 12, the crosspiece 13, the terminal vertical wall 14, and the terminal frame 15 may be molded from a synthetic resin material.

  As described above, the terminal vertical wall 14 that blocks the portion corresponding to the oil outflow side of the filter F in the internal passage of the strainer body B1 is formed in the upstream side terminal portion of the unit body 11, so that the oil is filtered by the filter F. It is possible to reliably prevent leakage to the outflow side without any problems. In addition, in this case, the terminal frame 15 can be formed on the upstream terminal portion of the unit body 11 without any trouble.

  When the filter unit U1 is inserted into the strainer main body B1, the side surface of the unit main body 11 and the outer peripheral portion of the terminal frame 15 are guided (guided) by the inner peripheral portion of the strainer main body B1 and stored without rattling. The shape and dimensions are set so that.

  In the present embodiment, the terminal frame 15 is preferably formed in an annular shape corresponding to the inner peripheral portion of the strainer main body B1, and the entire outer peripheral portion of the annular terminal frame 15 is guided by the inner peripheral portion of the strainer main body B1. . Thereby, the holding state in the strainer main body B1 of the filter unit U1 can be further stabilized.

  As shown in detail in FIG. 4, a pair of claw portions 16 projecting outward are formed on the left and right side surfaces of the terminal frame 15. On the other hand, a pair of fitting holes 5 for fitting with the claw portions 16 are formed in corresponding portions of the strainer body B1. Then, when the filter unit U1 is completely inserted into the strainer body B1, each claw portion 16 of the terminal frame 15 is fitted into the corresponding fitting hole 5, whereby the filter unit U1 is inserted into the strainer body B1. It is securely held against the falling out.

  A recess 4 is formed in the bent portion at the top of the strainer body B1 to engage the tip 17 of the unit body 11, and when the filter unit U1 is completely inserted into the strainer body B1. The unit main body tip 17 is adapted to engage with the recess 4.

  As described above, the claw portion 15 and the fitting hole 5 are provided between the terminal frame 15 and the strainer body B1 as a drop prevention means for preventing the filter unit U1 from falling off. The filter unit U1 including the unit body 11 having a substantially plate shape as a whole can be inserted into the strainer body B1 from the upstream side and held in the strainer body B1 without dropping off. Accordingly, the manufacturing process of the strainer body B1 and the process of assembling the filter unit U1 are not complicated, and the structure of the relatively simple structure including the substantially flat plate-like unit body 11 having the substantially flat filter F is provided. The filter unit U1 can be incorporated in the strainer body B1. Further, the present invention can be effectively applied even when the strainer body B1 is relatively thin.

Next, another embodiment of the present invention will be described. In the following description, components having the same configuration as those in the first embodiment and having the same function are denoted by the same reference numerals, and further description thereof is omitted.
FIG. 6 is a perspective view of the filter unit U2 incorporated in the oil strainer according to the second embodiment of the present invention, and FIG. 7 is a cross-sectional view showing an assembled state of the filter unit U2 shown in FIG. 6 into the strainer body B2. It is.

The filter unit U2 according to the second embodiment is different from that of the first embodiment in that the terminal frame 25 is not annular but is formed in a U shape with one side opened.
In addition, a pair of engaging grooves g2 along the longitudinal direction are provided in a portion corresponding to the unit body 11 of the filter unit U2 on the inner peripheral portion of the strainer body B2, and the filter unit U2 is placed in the strainer body B2. When inserted, the left and right side surfaces of the unit main body 11 (that is, the left and right sides of the filter frame 12) are inserted into the engagement groove g2.

  As described above, the side surface of the unit main body 11 is inserted into the engaging groove g2 formed in the inner peripheral portion of the strainer main body B2, so that the insertion operation of the filter unit U2 into the strainer main body B2 is easier and more reliable. In addition, the filter unit U2 can be held more stably in the strainer body B2.

  FIG. 8 is a perspective view of a filter unit U3 incorporated in an oil strainer according to the third embodiment of the present invention, FIG. 9 is a cross-sectional view showing a state in which the filter unit U3 shown in FIG. FIG. 10 is a cross-sectional view showing a state in which the filter unit U3 shown in FIG. 8 is assembled into the strainer main body B3 of the terminal frame and the vertical wall of the terminal.

  The filter unit U3 according to the third embodiment is different from that of the second embodiment in that ribs 22r extending in the longitudinal direction are formed on the left and right sides of the filter frame 22. Accordingly, a pair of engaging grooves g3 along the longitudinal direction for engaging the ribs 22r are provided on the inner peripheral portion of the strainer main body B3 at a portion corresponding to the unit main body 21 of the filter unit U3. When the filter unit U3 is inserted into the strainer main body B3, the ribs 22r of the left and right side surfaces of the unit main body 21 (that is, the left and right side portions of the filter frame 22) are engaged in the engagement groove g3. Inserted together.

In any of the above embodiments, the terminal vertical wall 14 completely blocks the portion corresponding to the oil outflow side of the filter F in the internal passage of the strainer body, but at least a part of the terminal vertical wall 14 is filtered. F may be used.
FIG. 11 is a cross-sectional view showing a state in which the filter unit U4 incorporated in the oil strainer according to the fourth embodiment of the present invention is incorporated into the strainer body B3 of the terminal frame and the terminal vertical wall. In the filter unit U4 according to the fourth embodiment, the terminal wall portion 24 is configured by the filter F in the entire region except for the peripheral portion.

  Thus, by constituting at least a part of the terminal vertical wall 24 with the filter F, the filtration area of the filter unit U4 can be increased. Alternatively, the filter area of the unit main body 21 can be reduced by an amount corresponding to the increase, so that the filter unit U4 can be downsized, and the oil strainer itself can be downsized. In this embodiment, since the terminal vertical wall 24 is configured by the filter F, the rigidity of the terminal frame 25 may be reduced, and the engagement between the claw portion 16 and the fitting hole 5 may be weakened. It is preferable to provide a connecting wall 29 that connects the inner surfaces of the portions corresponding to the claw portions 16 and 16.

FIG. 12 is a perspective view of a filter unit U5 incorporated in an oil strainer according to the fifth embodiment of the present invention.
In this embodiment, the terminal vertical wall is not provided in the upstream terminal part of the unit main body 31 of the filter unit U5. The filter F is inclined with respect to the filter frame 32 by a predetermined angle, and the peripheral portion of the filter F and the filter frame 32 are shielded and connected by a continuous filter side wall 38.

The terminal frame 35 is formed in a U shape along the peripheral edge of the upstream end portion of the filter F and the peripheral edge of the upstream end portion of the left and right filter sidewalls 38 falling from the upstream end portion.
In this case, as shown by a broken line arrow d in FIG. 12, the oil flows from below the filter F without being blocked by the terminal vertical wall, is filtered by the filter F, and flows upward.

In any of the above embodiments, the claw portion 16 formed in the terminal frame of the filter unit is fitted into the fitting hole 5 provided in the strainer body, thereby preventing the filter unit from falling off from the strainer body. However, instead of this, the terminal frame may be welded and fixed to the strainer body.
FIG. 13 is a cross-sectional view showing a state where the filter unit U6 incorporated in the oil strainer according to the sixth embodiment of the present invention is assembled to the terminal frame 45 and the terminal vertical wall 44 into the strainer body B6, and FIG. It is sectional drawing which expands and shows the principal part.

  In this embodiment, the filter unit U6 is inserted along the longitudinal axis from the opening 3 on the upstream side (the right side in FIGS. 13 and 14) of the strainer body B6, and as shown in FIGS. 13 and 14, the strainer body In a state where the end frame 45 of the filter unit U6 is fitted to the boss portion 8 on the upstream side of B6, for example, by applying a laser welding method or an ultrasonic welding method, the outer peripheral portion of the end frame 45 is connected to the boss portion 8. It is made to fix to the inner peripheral part of. This reliably prevents the filter unit U6 from falling off the strainer body B6.

  In the present embodiment, the terminal frame 45 protrudes upstream along a part of the peripheral edge of the terminal vertical wall 44 on the upstream terminal side of the unit main body 41 as in the first embodiment. And is formed in an annular shape corresponding to the inner peripheral portion of the strainer body B1, and the entire outer peripheral portion of the annular terminal frame 45 is guided by the inner peripheral portion of the strainer main body B1. Yes.

  As shown in detail in FIG. 14, the inner peripheral portion of the boss portion 8 is, in order from the upstream side, a first inner peripheral surface H1, a smaller second inner peripheral surface H2, and a smaller second inner peripheral surface H2. 3 is provided, and an inner peripheral stepped portion Hd is formed between the first inner peripheral surface H1 and the second inner peripheral surface H2 by an inclined surface. An annular wall portion 9 is formed between the second inner peripheral surface H2 and the third inner peripheral surface H3 to hold the terminal vertical wall 44.

  On the other hand, the outer peripheral portion of the terminal frame 45 includes, in order from the upstream side, a first outer peripheral surface K1, a second outer peripheral surface K2 smaller than the first outer peripheral surface K2, and a third outer peripheral surface K3 smaller than the second outer peripheral surface K2. An outer peripheral stepped portion Kd connected by an inclined surface is formed between the outer peripheral surface K2 and the third outer peripheral surface K3. The third outer peripheral surface K3 is located on the outer peripheral portion of the terminal vertical wall 44.

  The first outer peripheral surface K1 of the terminal frame 45 is substantially the same as the first inner peripheral surface H1 of the boss portion 8, but is slightly smaller, so that the terminal frame 45 can be inserted into the boss portion 8 without hindrance, and it is not stable in the inserted state. Dimensioned so that there is no. Further, the third inner peripheral surface H3 of the boss portion 8 is set smaller than the third outer peripheral surface K3 of the terminal frame 45, and the terminal frame 45 of the filter unit U6 is completely inserted into the boss portion 8 of the strainer body B6. When fitted, the terminal vertical wall 44 can be reliably stopped by the annular wall portion 9.

  Further, the second outer peripheral surface K2 and the third outer peripheral surface K3 of the terminal frame 45 are set smaller than the first inner peripheral surface H1 and the second inner peripheral surface H2 of the boss portion 8, respectively. Therefore, when the terminal frame 45 is completely inserted and fitted into the boss portion 8, the first annular ring between the second outer peripheral surface K 2 of the terminal frame 45 and the first inner peripheral surface H 1 of the boss portion 8 is formed. A gap portion J1 is formed, and an annular second gap portion J2 is formed between the third outer peripheral surface K3 of the terminal frame 45 and the second inner peripheral surface H2 of the boss portion 8.

  The welding is performed in a state where the outer peripheral step portion Kd of the terminal frame 45 and the vicinity thereof and the inner peripheral step portion Hd of the boss portion 8 and the vicinity thereof are in contact with each other, and the contact portion D is mainly melted. However, since the front and rear of the melted portion D are sandwiched between the annular first and second gaps J1 and J2, excess molten resin accumulates in the gaps J1 and J2 and leaks inward and outward. There is no. That is, the welding burr does not protrude inside and outside.

  The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications and improvements can be made without departing from the scope of the invention.

It is a front view of the oil strainer which concerns on the 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the oil strainer along the Y2-Y2 line in FIG. FIG. 2 is a perspective view of a cross section of an oil strainer taken along a line Y3-Y3 in FIG. It is explanatory drawing which expands and shows the principal part of FIG. It is a perspective view of the filter unit integrated in the oil strainer. It is a perspective view of the filter unit integrated in the oil strainer which concerns on the 2nd Embodiment of this invention. FIG. 7 is a cross-sectional view showing a state in which the filter unit of FIG. 6 is assembled into the strainer body. It is a perspective view of the filter unit integrated in the oil strainer which concerns on the 3rd Embodiment of this invention. FIG. 9 is a cross-sectional view showing a state where the filter unit of FIG. 8 is assembled into the strainer body. It is sectional drawing which shows the integration state to the strainer main body of the terminal frame and terminal vertical wall of the filter unit of FIG. It is sectional drawing which shows the integration state to the strainer main body of the terminal frame and terminal vertical wall of the filter unit integrated in the oil strainer which concerns on the 4th Embodiment of this invention. It is a perspective view of the filter unit integrated in the oil strainer which concerns on the 5th Embodiment of this invention. It is sectional drawing which shows the integration state to the strainer main body of the terminal frame and terminal vertical wall of the filter unit integrated in the oil strainer which concerns on the 6th Embodiment of this invention. It is sectional drawing which expands and shows the principal part of FIG.

Explanation of symbols

5 (Strainer body) fitting hole 11, 21, 31, 41 (Filter unit) unit body 14, 24, 44 Terminal vertical wall 15, 25, 35, 45 Terminal frame 16 (Terminal frame) claw B1, B2, B3, B6 Strainer body F Filter g2, g3 (Strainer body) engagement groove S1 Oil strainer U1, U2, U3, U4, U5, U6 Filter unit

Claims (5)

An oil strainer in which a filter unit is inserted and disposed inside a strainer body that is substantially tubular and integral,
The filter unit includes a unit main body having a substantially flat filter and having an overall plate shape as a whole, and a terminal frame formed along at least a part of the periphery of the oil inflow side terminal portion of the unit main body. ,
The side part of the unit main body and the outer peripheral part of the terminal frame are guided by the inner peripheral part of the strainer main body,
Between the terminal frame and the strainer body, a drop prevention means for preventing the filter unit from dropping is provided.
Oil strainer characterized by that.   A terminal vertical wall that blocks a portion of the strainer body internal passage corresponding to the oil outflow side of the filter is formed in the oil inflow side terminal portion of the unit body, and the terminal frame is a part of the periphery of the terminal vertical wall. The oil strainer according to claim 1, wherein the oil strainer is formed along the line.   The oil strainer according to claim 2, wherein at least a part of the terminal vertical wall is configured by a filter.   The oil strainer according to any one of claims 1 to 3, wherein a side surface portion of the unit main body is inserted into a groove portion formed in an inner peripheral portion of the strainer main body.   The terminal frame is formed in an annular shape corresponding to an inner peripheral portion of the strainer body, and an entire outer peripheral portion of the annular terminal frame is guided by an inner peripheral portion of the strainer body. 5. The oil strainer according to any one of 4 to 4.

Images