JP3132772B2 - Oil strainer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an oil strainer for filtering lubricating oil or oil used for operation.

[0002]

2. Description of the Related Art As a conventional oil strainer, there is, for example, one used for an automatic transmission shown in FIG.
A hydraulic pressure generated by an oil pump (not shown) provided in the transmission case cover 1 is supplied to the torque converter 2 and is controlled and regulated by a hydraulic control valve 4 disposed below the transmission mechanism 3. It is sent out as hydraulic oil for internal clutches. Then, it circulates through the transmission to reach the oil pan 5 and also performs a lubricating function for each part. An oil strainer 10 is provided for filtering impurities from the oil.

[0003] An oil strainer 10 is attached to the lower surface of the hydraulic control valve 4, and its suction port 11 is opened near the center of the oil pan 5 toward the bottom wall, and the transmission case cover 1 passes through a passage in the hydraulic control valve 4. Is connected to the oil pump suction port 6 of the oil pump. At this time, if metallic foreign matter, iron powder, or the like adheres and accumulates on the filter of the oil strainer 10, the passage resistance of the oil increases. Therefore, the magnet 13 is disposed on the bottom wall of the oil pan 5 in order to remove them.

[0004]

However, in the above-mentioned conventional structure, a projection 15 is formed on the bottom wall of the oil pan to position and attach the magnet 13, and the hole of the ring-shaped magnet 13 is formed by the projection. Since the oil pan 5 is fixed by a magnetic force in accordance with No. 15, the material of the oil pan 5 is limited to a conventional iron plate or the like, and this is an obstacle to promoting the use of aluminum or resin for weight reduction.

Although the magnet 13 is disposed near the suction port 11 of the oil strainer 10, it is provided only at a part of the bottom wall of the oil pan which is extremely wide compared to the suction port. Therefore, it is effective only for the oil flowing from the upper limit direction toward the suction port 11. Therefore, even if the bent magnet 13 is provided, there is a problem that most of the oil is sucked into the oil strainer 10 without contacting the magnet.

Accordingly, the present invention has been made in view of the above problems, and has no restriction on the material of the oil pan and other materials.
Moreover, an object of the present invention is to provide an oil strainer in which metallic foreign matter, iron powder, and the like are effectively removed so as not to deposit on a filter.

[0007]

SUMMARY OF THE INVENTION Therefore, the present invention has a strainer body provided with a filter, and a holding means is provided near a suction port of the strainer body, and a ring-shaped magnet is arranged around the suction port. Set oil strike
Lena and strainer body
The filter has a hemispherical shape with a flange flange.
The hemispherical part is molded and faces the strainer body.
To the flange of the strainer body.
Fixed and holding means projecting to the outer surface of the strainer body
And the positioner formed by suction
Holding piece having claws extending in the direction of the mouth and locking the magnet
It consisted of .

[0008]

[Function] A means for holding the magnet is provided on the strainer body so that the ring-shaped magnet is positioned at the peripheral edge of the suction port of the strainer body, so iron powder and other wear impurities contained in oil are effectively adsorbed and removed by the magnet. You. In addition, the filter strikes the flange flange.
The magnet is fixed to the flange of the
Since it is held by the holding means on the outer surface of the lena body,
And magnets are installed without interference
Magnet is not an oil pan but a strainer body
It is held as a unit, so the material of the oil pan, etc.
Is not restricted.

[0009]

1 and 2 show an embodiment of the present invention.
Strainer body 21 made of cylindrical resin having an opening at the lower end
, A horizontal elbow 22 for connecting to an oil pump suction port 42 is formed at an upper end thereof. At the tip of the elbow, an arm 23 for attachment to a vertical wall 40 such as a transmission case cover having an oil pump suction port is provided. A lower end opening 26 of the strainer body 21 has a substantially circular cross section, and a filter 30 made of a mesh formed into a hemispherical portion 32 having a flange-like flange 34 on the periphery moves the hemispherical portion 32 into the strainer body 21. The flange-like flange 34 is fixed to the flange 28 formed on the periphery of the opening 26 of the strainer body by heat welding.

On the outer surface of the strainer body 21, a plurality of positioners 52,
52 ′ is provided so as to protrude in a tongue shape in the radial direction, and a bead 5 is provided between the positioners 52 and 52 ′ and the flange 28.
4 is extended. A ring-shaped magnet 50 having a hole corresponding to the outer diameter of the open end is fitted into the tip of the strainer body 21 in contact with the positioners 52 and 52 '. The distal end surface of the magnet 50 is
It is substantially aligned with the front end surface of.

Of the plurality of positioners, two of the positioners 52 which are opposed to each other on the peripheral edge are provided with claws 5 which extend downward along the outer peripheral surface of the magnet and are engaged at the tip with the lower surface of the magnet 50.
A holding piece 56 having 8 is provided. As a result, the position of the magnet 50 is fixed so as to reach the entire periphery of the lower end opening 26 serving as the suction port of the strainer.

According to this structure, since the magnet 50 extends over the entire periphery of the lower end opening 26 serving as the suction port of the strainer, all of the oil flowing into the strainer crosses the magnet, and iron powder and the like contained in the oil Wear impurities are effectively adsorbed to the magnet, and the deposition on the filter is greatly reduced. Since the magnet 50 is held by the strainer body 21, there is no restriction on the material of the oil pan for fixing. In addition, since the strainer body 21 is also made of resin, it contributes to the possibility of reducing the weight of the material such as the oil pan and the weight of the entire automatic transmission. Furthermore, since the strainer is unitized including the magnet, the handling is simplified.

Although the positioner is formed as a divided small piece, the present invention is not limited to this. For example, the positioner may be formed in a flange shape over the entire circumference, and the holding piece may be provided at a position substantially equally divided on the circumference. Further, the magnet can be made to protrude further downward so that the magnet becomes the foremost surface of the strainer body. In the illustrated embodiment, the positioner or the holding piece is formed integrally from the strainer body. However, the present invention is not limited to this, and the magnet may be fixed by a separate band or the like.

[0014]

As described above, according to the present invention, since the magnet holding means is provided on the strainer body so that the ring-shaped magnet is located at the peripheral edge of the suction port of the strainer body, iron powder and other wear impurities contained in the oil are eliminated. It is effectively absorbed and removed by the magnet. Further, there is an advantage that the material does not impose any restrictions on the material of the oil pan and the like, and the unit is preliminarily unitized as a strainer assembly.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a partial sectional view taken along the line AA of FIG. 1;

FIG. 3 is a diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission case cover 2 Torque converter 3 Transmission mechanism 4 Hydraulic control valve 5 Oil pan 6 Oil pump suction port 10 Oil strainer 11 Suction port 13 Magnet 15 Protrusion 21 Strainer body 22 Elbow 23 Mounting arm 26 Opening 28 Flange 30 Filter 32 Hemispherical part 34 Flange flange 40 Vertical wall 42 Oil pump inlet 50 Magnet 52, 52 'Positioner 54 Bead 56 Holding piece 58 Claw

Claims (1)

(57) [Claims] 1. A has a strainer body with a filter, by providing a holding means in the vicinity of the suction port of the strainer body, the periphery of the suction port and an oil strainer is disposed a ring-shaped magnet, the The strainer body has a flange at the suction port
And the filter is formed in a hemispherical shape having a flange flange.
And the hemispherical portion faces the inside of the strainer body.
And attach the flange to the flange of the strainer body.
And the holding means is formed so as to protrude from the outer surface of the strainer body.
And the suction port axis from the positioner
A holding piece having a claw extending in the direction
An oil strainer characterized by comprising: