JPH0612286Y2 - Fluid filter device for automatic transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fluid filter device for an automatic transmission,
In particular, the present invention relates to a fluid filter device for an automatic transmission capable of efficiently filtering.

[Prior art and problems to be solved]

Generally, a filter device in which a wire mesh filter of 120 to 200 mesh is sandwiched in a sheet metal case is used, but recently, in order to improve the dust trapping property, a felt shape made of a fiber such as nylon or polyester is used. A sheet-shaped filter material that is bent is being used in a bag shape by sandwiching and fixing the peripheral edge between upper and lower cases made of synthetic resin or sheet metal.

That is, in the fluid filter device for an automatic transmission using the felt-like sheet-shaped excess material, as shown in FIGS. 12 and 13, the inflow port 2 of the lower case 21 is
2, the opening 24 of the sheet-shaped filter medium 23 is positioned and caulked, the filter medium 23 is folded in two, and the lower case 2
The upper case 26 having the outflow port 27 is located at the upper part of the first part 1 and the three edges of the sheet-shaped filter medium 23 folded in two are sandwiched and fixed.

However, in the conventional fluid filter device for an automatic transmission configured as described above, the internal space B is extremely small because it is used only by bending the sheet-shaped filtering material. The problem is that the fluid entering the inside of the filter medium through the inflow port of the case, that is, the inflow of the oil is throttled and the inflowing oil cannot be efficiently filtered to capture the mixed dust. Had.

This invention solves the above-mentioned problems with the conventional ones, and widens the inner space of the filter medium to allow oil to pass through a wide surface of the filter medium and efficiently remove dust contained in the oil. An object of the present invention is to provide a fluid filter device for an automatic transmission that can be captured.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a filtration having an inner space formed on the upper surface of a lower case having an inflow port by folding it in half and having an opening for communicating from the inflow port to the inner space. A fluid filter device for an automatic transmission, in which a filter material is disposed, an upper case having an outlet is disposed above the filter material, and a peripheral edge of the filter material is clamped and fixed between the filter material and the lower case. Then, a means for arranging a spacer in the inner space of the filter medium to widen the inner space is adopted, and in this case, the spacer has a filter medium on both sides of the elongated plate-shaped main body. Since it has a connecting part of
The inner surface of the filter medium is separated by the width of the main body to form an internal space, and the main body is filtered from the inflow side of the oil to transmit the oil to the peripheral edge of the filter medium. The means for directing to the peripheral portion of is adopted.

[Action]

According to the present invention, by adopting the above-mentioned means, it is possible to widen the internal space formed between the inner surfaces of the filter media folded in two, and filter on a wide surface of the filter media, thereby significantly improving the filtration efficiency. Becomes

〔Example〕

 An embodiment of the present invention shown in the drawings will be described below.

FIG. 1 shows a fluid filter device for an automatic transmission according to the present invention, in which the fluid filter device for an automatic transmission has an upright peripheral portion and an inflow port 2 provided at a central portion. The lower case 1 in which the peripheral portion of the inflow port 2 is also upright, and the upper case of the lower case 1 are provided in a folded state and are made of fibers such as nylon and polyester and have an opening 4. The sheet-shaped filter medium 3 is formed in a felt shape, a spacer 5 for expanding the inner space of the filter medium 3 folded in two, and an upper case 6 having an outlet 7.

As shown in FIGS. 2 and 3, the spacer 5 is made of synthetic resin or aluminum, and is orthogonal to the main body 8 at two opposite positions on both sides of the main body 8 having an oblong shape. Is provided at the center of the disc portion 9, and the protrusion portion 1 is provided on the upper surface of the disc portion 9 at the peripheral portion of the protrusion portion 10.
It has a configuration in which an annular recess 11 centered at 0 is formed.

The filter material 3 is formed of a felt-like sheet made of a fiber such as nylon or polyester, and has an opening 4 formed on one side thereof. The opening 4 is located closer to the opening 4 than the bent portion 12. A pair of protrusions 10 formed on one side of the spacer 5 can be inserted, and two holes 13 facing in the longitudinal direction are formed in two sets at predetermined intervals in the width direction. The holes 13 are also formed at the positions corresponding to the holes 13 when bent at the bending portion 12.

The number of the holes 13 for attaching the spacers 5 is changed according to the area of the filter material 3.

Then, the spacer 5 is inserted into the hole 13 on the opening 4 side of the filter medium 3 to obtain the state shown in FIG. 4. At this time, the protrusion of the spacer 5 penetrating the hole 13 of the filter medium 3 A state in which a ring 14 as shown in FIG. 6 is inserted into the portion 10 and a part of the filter medium 3 is located in the annular recess 11 of the disc portion 9 of the spacer 5 as shown in FIG. The filter medium 6 is securely fixed to prevent the filter medium 6 from being displaced.

In this case, assuming that the diameter of the annular recess 11 formed in the disk portion 9 is d _{1 and} the diameter of the ring 14 is d ₂ ,
d ₁ is larger than the sum of d ₂ and twice the thickness of the filter medium 3.

It should be noted that instead of the ring 14 as described above, a ring 15 having a curved peripheral edge portion 15a as shown in FIG. 7 is used, and further, chamfering the end portion 11a of the recessed portion 11 is performed by filtering. It is effective in preventing the material 3 from being damaged.

Further, as shown in FIG. 11, without forming an annular recessed portion 11 on the upper surface of the disc portion 9, a concentric circular protrusion 20 having a triangular cross section may be provided, or a wrinkle-like minute unevenness may be provided. Is also effective in preventing the displacement of the filter medium 3.

The filter medium 3 with the spacers 5 attached thereto is located between the upper and lower cases 6 and 1 as described above.
As shown in FIG. 9 and FIG. 9, the periphery of the inflow port 2 is raised, and the periphery of the inflow port 2 is also upright, and a plurality of ribs 16 are provided on the inflow port 2 of the lower case 1 to open the filter medium 3. The portion 4 is located and the periphery of the inflow port 2 of the lower case 1 is fixed by caulking 17.

Next, the filter material 3 is folded in two with the bent portion 12 as a boundary, and the two spacers 5 are attached to one side.
The hole 1 formed on the bent side in the protrusion 10 on the other side
3 is inserted and the filter medium 3 is fixed to the disc portion 9 of the spacer 5 by using the ring 14 as in the case of one side.

After this, the upper case 6 provided with the ribs 18 in the same direction as the ribs 16 of the lower case 1 is covered,
The overlapped three sides and the bent one side of the filter medium 3 are sandwiched between the peripheral portion of the lower case 1 and the peripheral portion of the lower case 1, and the peripheral portion of the lower case 1 is fixed by caulking 19.

When the filter configured as described above is to perform the filtering action, the fluid is introduced into the inflow port 2 formed in the lower case 1,
That is, when the oil flows in, first,
It flows into the inner space of the folded filter material 3 and is filtered,
The oil that has been filtered flows out from the outflow port 7 of the upper case 6.

At the time of this filtration, in the above-mentioned conventional one, the space between the filter media folded in two, that is, the internal space is narrow, and the oil flowing from the inflow port of the lower case is squeezed. Therefore, efficient filtration is possible. Although not possible, in the fluid filter device for an automatic transmission according to the present invention, the spacer 5 for expanding it is provided in the internal space A formed between the two folded filter media 3. Therefore, the internal space A formed between the two-folded filter media is remarkably widened, and the dust mixed in the oil can be captured on the wide surface of the filter media, so that the dust capture is efficient. It will be.

[Effect of device]

By having the above-mentioned configuration, the present invention can widen the internal space formed by the filter material that is folded in two in the upper and lower cases, and allows the inflowing fluid to reach every corner of the internal space. Since it can be distributed, it has an excellent effect such that filtration can be carried out over the entire surface of the filter medium, and thereby the efficiency of trapping the mixed dust can be remarkably enhanced.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing the entire fluid filter device for an automatic transmission according to the present invention, FIG. 2 is a schematic perspective view of a spacer used, and FIG. 3 is a line III-III in FIG. FIG. 4 is a schematic perspective view showing a state in which a spacer is attached to the filter medium, FIG. 5 is a view taken along line IV-IV of FIG. 4, and FIG. 6 is a view showing a ring. FIG. 7 is a schematic enlarged cross-sectional view showing a state where the spacer and the filter medium are attached when another ring is used, FIG. 8 is a schematic perspective view showing the lower case, and FIG. 9 is IX-IX of FIG. Figure 10 as seen along the line
8 is a view taken along the line XX of FIG. 8, FIG. 11 is a view showing another example of the disk portion of the spacer, and FIG. 12 is a schematic vertical section showing a conventional fluid filter device for an automatic transmission. Plan, thirteenth
The figure is a schematic view showing the filter medium used in the one shown in FIG. 1, 21 ...... Lower case 2, 22 ...... Inflow port 3,23 ...... Filtration material 4,24 ...... Opening part 5 ...... Spacer 6,26 ...... Upper case 7,27 ...... Outflow port 8 ...... Main body Part 9 ... Disc part 10 ... Projection part 11 ... Recessed part 12 ... Bent part 13 ... Hole 14, 15 ... Ring 16, 18 ... Rib 17, 19 ... Caulking

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-132516 (JP, A) Actual opening 61-135098 (JP, U) Actual opening 63-20909 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. An upper space of a lower case (1) having an inflow port (2) is folded in half to form an internal space, and an opening (4) is provided for communicating from the inflow port (2) to the internal space. ) Is disposed, and an upper case (6) having an outlet (7) is provided on an upper portion of the filter medium (3).
Is a fluid filter device for an automatic transmission, in which a peripheral edge of the filter medium (3) is sandwiched between and fixed to the lower case (1). A fluid filter device for an automatic transmission, characterized in that a spacer (5) is arranged in (A) to expand the internal space (A). 2. The spacer (5) has connecting portions with the filtering material (3) on both sides of a main body (8) having an elongated plate shape,
The inner surface of the filter medium (3) is separated by the width of the main body part (8) to form an internal space (A), and the main body part (8) extends from the oil inflow side to the filter medium (3). The fluid filter device for an automatic transmission according to claim 1, which faces a peripheral portion of the fluid transmission device.