JP3771391B2 - Fluid filter device for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a thin fluid filter device used in a vehicle. For example, the present invention can be applied to a fluid filter device for hydraulic oil filled in an automatic transmission.
[0002]
[Prior art]
In an automobile equipped with an automatic transmission, a fluid filter device is used for filtering hydraulic oil filled in a mission. This type of fluid filter device has a flat shape because it needs to be installed in a narrow space below the mission case. FIG. 6 shows an example of the filter device.
[0003]
This filter device has case elements 1 and 2 made of iron plate, a filter guide 3, and a filter element 4. The filter element 4 is bonded to the filter guide 3 and the case element 2 with an adhesive, and the case elements 1 and 2 are joined to each other on the outer periphery thereof.
[0004]
[Problems to be solved by the invention]
In the conventional fluid filter device, since each component is manufactured in a separate process, an adhesion process is necessary, and the number of parts is large and the manufacturing process is complicated. In addition, there is a problem that the liquid tightness is unstable in the adhesion using an adhesive.
[0005]
Therefore, an object of the present invention is to provide a thin fluid filter device for an automatic vehicle that can reduce the cost by reducing the number of parts and has high liquid-tightness.
[0006]
[Means for Solving the Problems]
The present invention will be described below. In order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are appended in parentheses, but the present invention is not limited to the illustrated embodiment.
[0007]
The fluid filter device of the invention of claim 1 is sandwiched between a filter case (10) configured by combining a pair of resin case elements (10A, 10B) and the pair of case elements (10A, 10B). A filter element (20) for dividing the inside of the filter case (10) into a dirty side (S1) and a clean side (S2), from the dirty side (S1) toward the clean side (S2). A fluid filter device for a vehicle that passes oil for automatic transmission and filters the oil. The filter element (20) includes an element body (21) for filtering fluid, and an element body (21 surrounds the outer periphery of), and a resin holding member frame flange (22a) is formed on the outer peripheral edge (22), the element Body, ridges and valleys of a given filter medium is constituted by pleated so as to be arranged alternately, the holding member (22) is the element body by injection molding to insert element body (21) (21) And the frame flange (22a) is an outer periphery of the pair of case elements in a state of being sandwiched between case element flanges (14A, 14B) which are outer peripheral edges of the case elements (10A, 10B). The case element flanges (14A, 14B) are welded over the entire circumference. According to the present invention, the number of parts can be reduced and the cost can be reduced because the resin can be formed. Further, since the element body (21) and the holding member (22) are integrally formed, high liquid tightness is obtained.
[0008]
In addition, when the element body (21) is configured with a pleat fold in which peak portions and valley portions are alternately arranged, the filter medium having a wider area than in the case where the element main body (21) is not fold-folded is contained in the fluid filter device. It is possible to obtain the strength against pressure of oil.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 to 5 show a filter device to which the present invention is applied. The filter device includes a filter case 10 made of resin and a filter element 20 that is attached to the filter case 10 and divides the filter case 10 into a dirty side S1 and a clean side S2. The filter case 10 is configured by combining a pair of resin case elements 10A and 10B. One case element 10A has an inflow pipe 11 for guiding hydraulic oil to the dirty side S1, and a mounting hole 12 for fixing the filter case 10 to a transmission case or the like. The other case element 10B has an outflow pipe 13 for sending hydraulic oil from the clean side S2. Flange 14A, 14B for joining both over the perimeter is formed in the outer periphery of each case element 10A, 10B, respectively.
[0010]
The filter element 20 is made of a resin material provided so as to surround an outer periphery of the element body 21 and an element body 21 formed by folding a predetermined filter medium so that peaks and valleys are alternately arranged. Frame 22. The element body 21 and the frame 22 are integrally formed by an injection molding method using the element body 21 as an insert. A flange 22 a is provided on the outer periphery of the frame 22.
[0011]
The filter device is configured by sandwiching the flange 22a of the filter element 20 between the flanges 14A and 14B of the case elements 10A and 10B, and then joining the flanges 14A and 14B to each other. The joining method may be any of vibration welding, high frequency dielectric heating welding, ultrasonic heating welding, friction welding, and the like. The filter device configured as described above is fixed to an appropriate fixing portion of the vehicle, for example, a case of an automatic transmission or a vehicle body, by a bolt inserted into the mounting hole 12. The inflow pipe 11 is connected to a hydraulic oil discharge port of a transmission (not shown), and the outflow pipe 13 is connected to a hydraulic oil intake port of the transmission.
[0012]
The embodiment of the present invention is not limited to the above-described embodiment, and various modifications may be made. For example, an escape valve that opens when the pressure on the dirty side S1 exceeds a predetermined value due to clogging of the element main body 21 and allows hydraulic oil to pass from the dirty side S1 to the clean side S2 is provided on the flange 22a. May be provided. The fold-folding direction of the element main body 21 (direction in which peaks and valleys are alternately connected) may be shifted by 90 degrees with respect to that shown in FIG. The fluid filter device of the present invention is not limited to hydraulic oil for automatic transmissions, and may be used for filtering various fluids.
[0013]
【The invention's effect】
As described above, according to the fluid filter device of the present invention, by integrating the filter medium and the filter medium holding member by an injection molding method using the filter medium as an insert, the cost based on the reduction in the number of parts can be reduced. A thin fluid filter device with reduced and high liquid tightness can be realized.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a fluid filter device to which the present invention is applied.
2 is a schematic plan view showing the fluid filter device as viewed from above in FIG. 1;
FIG. 3 is a schematic plan view showing the fluid filter device viewed from below in FIG. 1;
4 is a cross-sectional view taken along line IV-IV in FIG.
5 is a cross-sectional view taken along line VV in FIG.
FIG. 6 is a perspective view showing a conventional fluid filter device for a vehicle.
[Explanation of symbols]
1, 2 Case element 3 Filter guide 4 Filter element 10 Filter case 10A, 10B Case element 11 Inflow pipe 12 Mounting hole 13 Outflow pipe 20 Filter element 21 Element body 22a Flange 22 Frame 14A, 14B Flange S1 Dirty side S2 Clean side

Claims (1)

Comprising a filter casing formed by combining a pair of case elements made of resin and a filter element which divides the sandwiched between said pair of case elements in the filter case to the dirty side and a clean side, said dirty A fluid filter device for a vehicle that passes oil for an automatic transmission from a side toward the clean side and filters the oil,
The filter element has an element main body for filtering a fluid, and a resin holding member that surrounds the outer periphery of the element main body and has a frame flange formed on the outer peripheral edge .
The element body is configured by folding a predetermined filter medium so that peaks and valleys are alternately arranged,
The holding member is integrated with the element body by injection molding using the element body as an insert,
A vehicle in which a case element flange, which is an outer periphery of the pair of case elements, is welded over the entire circumference in a state where the frame flange is sandwiched between case element flanges, which are outer peripheral edges of the case element. Fluid filter device.

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