JPH0612285Y2 - Fluid filter device for automatic transmission - Google Patents

Description

The present invention relates to a fluid filter device for an automatic transmission, and more particularly to a fluid filter device for an automatic transmission that can protect a filter for filtration.

[Prior art and problems to be solved]

Generally, in a fluid filter device for an automatic transmission,
It is constructed as shown in FIGS. 16 and 17.

That is, a metal net 22 between a metal lower case 26 provided with an oil inlet 25 and a metal upper case 28 provided with an oil outlet 27, and a metal net reinforcing the metal net 22. And a reinforcing plate 21 of.

As shown in FIG. 17, the reinforcing plate 21 has a lattice-shaped frame portion 23 inside a rectangular frame portion 24 that coincides with the outer peripheral edges of the upper and lower cases 26, 28, whereby the entire structure is The inside of the rectangular frame part 24 is formed into a plurality of parts and has a flat plate shape.

Then, a wire net 22 as a filter is provided on the upper part of the lower case 26 so as to be supported by the outer peripheral edge portion thereof, the reinforcing plate 21 is located on the upper part of the wire net 22, and the upper case is provided on the upper part thereof. After positioning 28, the outer peripheral edge of the lower case 26 is folded back and the gap between the upper case 28 and the lower case 26 is crimped so that they are integrated.

In the fluid filter device for an automatic transmission configured as described above, the oil that has flowed in from the inflow port 25 of the lower case 26 is filtered by the wire mesh 22 and is passed through the outflow port 27 of the upper case 28. To be supplied to.

During the above operation, the wire mesh is pressed by oil, but the reinforcing plate provided on the pressed side of the wire mesh prevents the wire mesh from being deformed or damaged.

However, in recent years, as the performance of the automatic transmission is improved, it is necessary to improve the dust trapping property of the filter. For this reason, the wire mesh as the filter is shifting from the conventional 120 mesh to 200 mesh. Therefore, various problems have arisen.

This problem means, for example, that the size of the wire mesh is 12
Although the dust trapping property is improved by reducing the mesh size from 0 mesh to 200 mesh, the dust adherence also increases, and when dust adheres, the oil passage area decreases and the oil passage resistance increases, and the reinforcing plate bends. Therefore, the wire mesh may be similarly deformed to enlarge the size of the mesh or may be damaged.

In addition, when the oil is at a low temperature, the viscosity increases and the oil passage resistance increases, which also deforms the reinforcing plate that holds the wire mesh and also deforms the wire mesh, which causes the mesh of the wire mesh to expand. In the worst case, the wire mesh may be damaged, so the dust that has been captured up to now may flow into the automatic transmission at once, which may seriously affect the function of the automatic transmission. Was the problem.

This invention solves the above-mentioned problems of the conventional ones, and when the mesh of the filter is made fine to improve the trapping performance, the reinforcing member is deformed even if the oil passage resistance increases. Therefore, it is an object of the present invention to provide a fluid filter device for an automatic transmission capable of preventing damage to the filter.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention has a filter for filtering oil and a lattice-like reinforcing member which is provided adjacent to the filter and which reinforces the filter, and which is arranged on the filter side. A fluid filter for an automatic transmission in which a lower case having an inflow port and an upper case having an outflow port on the side of the reinforcing member are respectively located and sandwiched between them. In the case, the grid-shaped portion is projected toward the upper case, and in this case, the grid-shaped portion is projected or the intersection is projected.
A boss member that can contact the upper case may be provided there,
The boss member has a claw portion at one end of the columnar main body and a locking portion at the tip at the other end,
Each of the arms has an arm portion that is locked by the claw portion, one end of the main body is located at an intersecting portion of the reinforcing member, and the arm portion is locked by the claw portion. The crossing portion is sandwiched between one end and the other end.

[Action]

According to the present invention, by adopting the above means, when the oil passage resistance of the filter is increased and the reinforcing member is pressed, the reinforcing member itself or a member integrated with the reinforcing member contacts the upper case. The contact prevents a large movement of the reinforcing member, which prevents the filter itself from moving greatly, that is, the mesh is not expanded or damaged.

〔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, and FIG. 2 shows a reinforcing plate 1 which is a reinforcing member and a wire mesh 2 which is a filter used in the fluid filter device for an automatic transmission. The state viewed from the lower case side is shown. The reinforcing plate 1 is made of metal or resin, and has a lattice-shaped frame portion 3 and a rectangular shape provided outside the frame portion 3. And a frame portion 4 of.

The intersecting portions 3a of the lattice-shaped frame portion 3 that intersect with each other are formed so as to protrude in the upper case direction more than other portions of the frame portion 3.

Then, the wire mesh 2 is superposed on the non-projecting side of the reinforcing plate 1 having the projecting intersecting portion 3a as described above, and the lower case 6 provided with the inflow port 5 is positioned, and The upper case 8 provided with the outflow port 7 is located on the side of the projecting intersection 3a of the reinforcing plate 1, and the peripheral parts of the upper case 8, the lower case 6, the reinforcing plate 1 and the wire mesh 2 are caulked and integrally formed. Is formed (see FIG. 1).

In the fluid filter for an automatic transmission configured as described above, when oil first flows into the inflow port 5, this oil is filtered by the wire netting 2 and the filtered oil flows out through the outflow port 7. It is adapted to be supplied to the automatic transmission through the.

In the above-described operation, when dust adheres to the wire netting 2 to reduce the oil passage area, or when the oil has a high viscosity at low temperature, the oil passage resistance increases and the reinforcing plate 1 Will be pressed in the direction of the upper case 8,
In this case, since the intersecting portion 3a of the lattice-shaped frame portion 3 of the reinforcing plate 1 projects toward the upper case 8 side, when the reinforcing plate 1 is pressed by the wire net 2, the intersecting portion 3a. Can reliably prevent the reinforcing plate 1 from displacing the upper case 8, and thus the wire mesh 2 is not deformed, so that the mesh size of the wire mesh 2 is increased. The damage is surely prevented.

FIG. 6 shows another embodiment of the fluid filter device for an automatic transmission according to the present invention. In this embodiment, the above-mentioned embodiment projects the intersection 3a of the reinforcing plate 1. On the other hand, the intersecting portion 3a does not project, but the other portions are projected.

That is, FIG. 7 shows a state in which the reinforcing plate 1 as a reinforcing member and the wire netting 2 as a filter are viewed from the lower case side. The reinforcing plate 1 is made of metal or resin and has a grid shape. And a rectangular frame portion 4 provided outside the frame portion 3.

Then, a portion other than the intersecting portion 3a of the lattice-shaped frame portion 3 is projected toward the upper case side to form a protruding portion 3b. Therefore, the portion of the protruding portion 3b is as shown in FIG. Together with the upper case 8 as shown in FIG.
It is possible to contact with.

Reinforcing plate 1 having the protruding portion 3b protruding as described above
The wire mesh 2 is superposed on the non-protruding side, and the lower case 6 provided with the inflow port 5 is located, and
An upper case 8 having an outlet 7 is located on the side of the protruding portion 3b, and peripheral portions of the upper case 8, the lower case 6, the reinforcing plate 1 and the wire mesh 2 are caulked to be integrally formed (sixth).
See figure).

Therefore, even in the fluid filter device for an automatic transmission configured as described above, when the reinforcing plate 1 is pressed by the oil toward the upper case 8 side, as in the case of the above-described embodiment, the protruding portion is formed. 3b is in contact with the upper case 8, and therefore, the fear that the reinforcing plate 1 is further displaced can be surely prevented, whereby the wire netting 2 can be prevented from being deformed and the wire netting 2 can be prevented from being damaged. Is.

It should be noted that an efficient oil flow path can be secured by inclining the projecting portion 3b with respect to the frame portion 3 at a predetermined angle θ as shown in FIG. 7A, and FIG. The oil flow can be controlled by widening the guide vanes 3c as shown in FIG. 3, and in this case, the guide vanes 3c can be made flat or have a curvature to improve efficiency. The flow path can be secured.

FIG. 11 shows an essential part of still another embodiment of the fluid filter device for an automatic transmission according to the present invention. In the fluid filter device for an automatic transmission shown in this embodiment, the above-mentioned embodiment is used. While the crossing portion 3a of the reinforcing plate 1 is projected and can come into contact with the upper case 8 in the case shown in (1), the projecting amount of the crossing portion 3a is small.

On the upper case 8 side of each intersection 3a, the first
A boss member 10 as shown in FIGS. 2 to 15 is attached.

That is, the boss member 10 is bendable at one end of a cylindrical main body 11 formed of a synthetic resin such as polypropylene, nylon, etc., and an arm portion having a locking portion 12a formed at the tip thereof. The four 12 are integrally provided, and the other end is integrally provided with a claw portion 13 capable of locking the arm portion 12 at a position corresponding to each of the arm portions 12.

When attaching the boss member 10 configured as described above to each intersecting portion 3 a of the frame portion 3, first, the claw portion 1
The other end of the main body 11 provided with 3 is placed in contact with the intersecting portion 3a, and then each arm portion 12 is bent toward the main body 11 side and engaged with the corresponding claw portion 13.

Therefore, in this state, the engaging portion 12a at the tip of the arm portion 12 engages with the intersecting portion 3a, and by bending the four arm portions 12 in this manner, four engaging portions 12a intersect each other. The boss member 10 can be connected to the intersecting portion 3a by engaging with the portion 3a.

In this case, although a restoring force acts on the arm portions 12, since each arm portion 12 is securely locked by the claw portion 13, the locking portion 1 at the tip of the arm portion 12 is secured.
The state in which 2a is locked to the intersection 3a is maintained.

Therefore, the boss member 10 is substantially the same as the protruding portion of the intersecting portion 3a, and the reinforcing plate 1 can be reliably displaced even if the protruding amount of the intersecting portion 3a is reduced as in the embodiment. It can be prevented.

Then, the wire mesh 2 is located on the side opposite to the boss member 10 on the reinforcing plate 1 provided with the boss member 10 as described above at each intersection 3a, and the lower case 6 is located on the boss member 10 side. A fluid filter device for an automatic transmission is manufactured by locating the upper case 8 and caulking and mounting them together.

In the fluid filter device for an automatic transmission configured as described above, when oil is introduced from the inflow port 5 provided in the lower case 6, the oil is filtered by the wire net 2 and the filtered oil is then filtered. Is supplied to the automatic transmission through the outlet 7.

In the above-described operation, when dust adheres to the wire netting 2 to reduce the oil passage area, or when the oil has a high viscosity at low temperature, the oil passage resistance increases and the reinforcing plate 1 Will be pressed in the direction of the upper case 8,
In this case, since the boss member 10 projecting to the upper case 8 side is provided at the intersecting portion 3a of the lattice-shaped frame portion 3 of the reinforcing plate 1, the reinforcing plate 1 is formed by the wire mesh 2. When pressed, the boss member 10 comes into contact with the upper case 8, and therefore, it is possible to surely prevent the reinforcing plate 1 from further displacing, which prevents the wire mesh 2 from being deformed. The mesh size of the wire net 2 is surely prevented from being enlarged or damaged.

[Effect of device]

With this configuration, the reinforcing member that reinforces the filter for filtering the oil can be prevented from being displaced more than a predetermined amount. Therefore, even when the filter is pressed by the oil, the reinforcing member can be reinforced. The plate prevents the filter itself from displacing, which has an excellent effect that the mesh size of the filter can be surely prevented from being expanded or damaged.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing a fluid filter device for an automatic transmission according to the present invention, and FIG. 2 is a schematic view of a reinforcing plate and a wire mesh used in the one shown in FIG. FIG. 3 is an enlarged view of the intersection of the frame portions of the reinforcing plate, FIG. 4 is a view taken in the direction of arrow A in FIG. 3, FIG. 5 is a sectional view taken along the line BB of FIG. 3, and FIG. FIG. 7 is a schematic vertical sectional view showing another embodiment of the fluid filter device for an automatic transmission according to FIG. 7, FIG. 7 is a schematic view of the reinforcing plate and the wire mesh used in the one shown in FIG. FIG. 8 is a sectional view of the protruding portion, 9th
FIG. 10 is a schematic view showing the relationship between the protruding portion and the upper case, FIG. 10 is a schematic view showing another example of the protruding portion, and FIG. 11 is a further embodiment of the fluid filter device for an automatic transmission according to the present invention. 12 is a schematic view showing a boss member, FIG. 13 is a plan view, FIG. 14 is a sectional view taken along the line D-D of FIG. 13, and FIG. 15 is an intersection of reinforcing plates. FIG. 16 is a view showing a state in which a boss member is attached, FIG. 16 is a schematic vertical sectional view showing a conventional fluid filter device for an automatic transmission, and FIG. 17 is a wire mesh and a reinforcing plate seen from FIG. FIG. 1, 21 ... Reinforcing member (reinforcing plate) 2, 22 ... Filter (wire mesh) 3, 23 ... Frame part 3a ... Intersection part 3b ... Protrusion part 3c ... Guide vanes 4, 24 ... Frame part 5 , 25 ...... Inflow port 6, 26 ...... Lower case 7, 27 ...... Outflow port 8, 28 ...... Upper case 10 ...... Boss member 11 ...... Main body 12 ...... Arm part 12a ...... Locking part 13 ...... Claw

Claims (3)

[Scope of utility model registration request] 1. A filter (2) for filtering oil and a grid-like reinforcing member (1) provided adjacent to the filter (2) for reinforcing the filter (2) are overlapped with each other. , A lower case (6) having an inflow port (5) on the filter (2) side, and an upper case (8) having an outflow port (7) on the reinforcing member (1) side. A fluid filter device for an automatic transmission, which is sandwiched between the reinforcing member (1) and the reinforcing member (1), wherein the grid-like portion (3) projects toward the upper case (8). Fluid filter device for automatic transmission. 2. A crossing portion (3a) of the reinforcing member (1) projects toward the upper case (8), and a boss member (10) capable of contacting the upper case (8) is provided at the projecting portion. The fluid filter device for an automatic transmission according to claim 1, wherein the fluid filter device is provided. 3. The boss member (10) has a cylindrical body (11), a claw portion (13) at one end, and a locking portion (12a) at the tip at the other end. Claw (1
Arms (12) locked by 3) are provided respectively, and one end of the main body (11) is provided at the intersection (3) of the reinforcing member (1).
a), and the locking part (12a) of the arm part (12) by locking the arm part (12) to the claw part (13).
The fluid filter device for an automatic transmission according to claim 2, wherein the intersecting portion (3a) of the reinforcing member (1) is sandwiched between and the one end of the main body (11).