JPS5853489Y2 - Mitsupusouchi - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealing device for a so-called unprocessed mating case, which joins corresponding case halves and eliminates any machining after die-casting.

The object of the present invention is to seal the mating surfaces and bearing portions of the unprocessed mating case reliably and at low cost.

The present invention has an annular packing that elastically fits an oil seal to be fitted onto a rotating shaft inserted into a bearing part of an unprocessed mating case, and the annular packing is formed with a semicircular recessed part in a half-closed part of the case. In addition, a three-dimensional packing is provided in which the flat packing inserted between the mating surfaces of the case half-opening and the annular packing are integrated through a thick continuous part, and the three-dimensional packing is made to fit tightly into the shaft hole of the commercially available product. To provide a sealing device that utilizes an oil seal to reduce costs and absorb manufacturing process errors due to half-time of the case to ensure reliable sealing.

Hereinafter, a description will be given based on the embodiments shown in the drawings.

In the figure, 1 and 1' are case halves constituting case 2, and both are joined at mating surfaces 3 and 3', with the axis line perpendicular to the mating direction and approximately on the mating surface. The rotary shaft 4 is arranged at the same position.

In each of the case halves 1, 1', substantially semicircular arc-shaped recesses 5, 5' having a diameter slightly larger than the outer periphery of the rotating shaft 4 are formed.

These semicircular arc-shaped recesses 5 and 5' are not formed into perfect semicircular arcs, but are formed to have a slightly smaller diameter than the diameter of the annular packing 6, which will be described later, only in the recess depth direction (D-D). 1
, 1' are pressed together, the annular packing 6 and oil seal 7 are held by the case halves 1, 1'.

On the other hand, an oil seal 7 is fitted onto the rotating shaft 4, and a rubber annular packing 6 that holds the oil seal 7 is positioned on the outer periphery of the oil seal 7. By forming pleats 8, 8 that hold the outer periphery and both sides of the oil seal T in order to position the oil seal T, it is prevented from fitting diagonally to the rotating shaft 4.

The annular packing 6 and the mating flat packing 9 that is in close contact between the mating surfaces 3 and 3' are integrally connected, and the connecting portion has a continuous thick wall that is thicker than other parts of the flat packing 9. A part (flange part) 10°10 is provided, and the case half 1,
When pressing 1', make sure that the surface pressure is relatively large,
Particularly, since the semicircular arcuate recesses 5 and 5' are formed, this portion where leakage is likely to occur is taken care of.

Reference numeral 11 indicates a bearing for the rotating shaft 4, and reference numeral 12 indicates a tightening hole formed in each part of the flat packing 9.

Incidentally, the oil seal 13 and the flat packing 9 are also formed into an integral structure via a similar internal continuous portion (flange portion) 14°14.

Thus, the annular packing 6.6' that elastically fits the oil seal 7.13 has an inner continuous portion 1G, 10° 14.14
It is integrated with the planar packing 9 in the orthogonal direction via the three-dimensional packing.

Therefore, by inserting the flat packing 9, which is a three-dimensional packing, between the case halves 1 and 1' at a predetermined position, the oil seal 7 is installed at a predetermined position in the shaft hole of the case.

Since the present invention is constructed in this way, the case half 1.1'
Misalignment in the A and B directions when joining the case halves 1 and 1
It is possible to absorb the machining errors of 1 and 1', and it is possible to sufficiently deal with these errors, and to prevent the position of the packing, etc., so that a reliable sealing effect can always be expected. The sealing effect can be ensured in a so-called unprocessed mating case in which no machining is required.

Furthermore, in the present invention, the connecting portion with the flat packing 9 is given an appropriate width so that the inner part 10 is thicker than other flat packing 9 parts.
．． The recesses 5 and 5' forming the shaft hole and forming the shaft hole have a substantially semicircular arc shape, but the radius in the direction perpendicular to the mating surface is slightly smaller, and the shaft hole has a dimension in the direction orthogonal to the mating surface. Since the inner hole of the field is slightly small, the annular packing 6 is pressed by contact with the recesses 5, 5', which have a slightly smaller diameter than the annular packing 6, and the annular packing 6 is pushed closer to the mating surface 3 than the part facing the recesses 5, 5'. , 3 is greatly deformed (deformed into a column shape with the major axis in the mating surface direction),
The surface pressure of the cylindrical part that is particularly prone to leakage at the corner between the semi-circular recesses 5, 5' formed in the case halves 1, 1' and the mating surfaces 3, 3' is reduced relative to other cylindrical parts. In addition, as mentioned above, the sealing effect is further improved due to the fact that the sealing part is a three-dimensional packing in which the mating packing 9 and the annular packing 6 are integrated. be.

Furthermore, the present invention uses a three-dimensional packing that is integrally formed with an annular packing that elastically fits the oil seal and a flat packing that is inserted between the mating surfaces, and the oil seal can be mounted in a predetermined position. It can be fixed at a predetermined position in the shaft hole, which facilitates the assembly work and ensures a reliable sealing effect.Furthermore, a commercially available oil seal can be used, which has the effect of reducing the cost of the sealing device.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional plan view of the main part of the device of the present invention, and FIG. 2 is a sectional side view of the main part. 1.1'...Case half-off, 3,3'...
・Matching surface, 4...Rotation axis, 5, 5'...
...Semicircular arc recess, 6.6'...Annular packing, 7...Oil seal, 9...Flat packing, 10, 14...Thickness Meat continuous part.

Claims (1)

[Claims for Utility Model Registration] The rotating shaft 4 is fitted into the shaft hole formed by the approximately semicircular arc-shaped recesses 5, 5' provided in the mating surfaces 3, 3' of the corresponding case halves 1, 1'. In the unprocessed mating case of the configuration, the dimension of the shaft hole formed by the substantially semicircular arc-shaped recess 5° 5' of the case halves 1 and 1' in the direction perpendicular to the mating surface direction is such that the dimension in the direction perpendicular to the mating surface direction is It is formed in the column inner hole, which is the short axis, which is slightly smaller than the long axis and slightly smaller than the outer diameter of the annular packing 6, and the mating surfaces 3,
3', and the semi-circular recess 5 of the case halves 1, 1', into which the oil seal 1 to be fitted onto the rotating shaft 4 inserted into the shaft hole is elastically fitted. , 5, and the annular packing 6 is in close contact with the rectangular hole-shaped shaft hole formed by the planar packing 9 and is perpendicular to the planar packing 9. The planar packing 9 and the annular packing 6 are continuous and integrated. A thick continuous part 10 , 10 ′ which is a continuous part and is formed on a flat surface with a thickness smaller than that of the flat packing is provided, and a three-dimensional packing including the thick continuous part 10 , 10 ′ and an annular packing 6 is provided. are elastically deformed when the case halves 1 and 1' are joined together, and the annular packing 6 is brought into close contact with the oval-shaped shaft hole, and the mating surface 3 is
, 3' and the concave portions 5, 5', the sealing device is adapted to tightly seal even the corner gaps between the concave portions 5, 5'.