JP2508492Y2 - Sealing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sealing device, and more particularly to a sealing device having excellent sealing performance and assembly workability.

[Prior art and its problems]

Conventionally, the relationship between the engine block and the oil pan and the rotating shaft such as the crankshaft is as shown in FIGS. 12 and 13, and a part of the oil pan 42 is flat with respect to the engine block 41. Alternatively, the mounting surface 43 is formed from two surfaces that project in a curved shape and are orthogonal to each other.

Then, in the case where it is mounted on the mounting surface 43 as described above and seals between them and the rotary shaft 44 such as a crankshaft, the sealing device shown in FIGS. 14 and 15 is used.
It is known to use a sealing device 60 such as 50 or also as shown in FIGS.

That is, the sealing device 50 shown in FIG. 14 and FIG.
The mounting surface 43 of the oil pan 42 as shown in FIG. 12 is mounted on a portion projecting like a flat plate, and is mounted on the mounting surface 43 of the engine block 41 and the oil pan 42.
An oil seal 55 is fitted to an inner peripheral surface 53 of a retainer 52 attached via a gasket 51 provided on the 54, and a lip portion 56 of the inner peripheral surface of the oil seal 55 is attached to the outer peripheral surface of the rotary shaft 44. By contacting with the rotary shaft 44, the rotary shaft 44 is sealed, and the gasket 51 is sealed with the engine block 41 and the oil pan 42.

In addition, as shown in FIG. 13, in the case where the oil pan 42 is attached to a curved protruding portion, the retainer is
The lower surface of 52 is curved so as to match.

However, in the conventional sealing device as described above, since the mating mounting surface 43 is formed by two surfaces, the shape of the gasket 51 must be such that two orthogonal surfaces are sealed. As a result, the gasket 51 has a complicated shape, which increases the manufacturing cost of the gasket 51, and has a problem that the sealing function cannot be achieved unless careful attention is paid to mounting.

Further, in the sealing device 60 as shown in FIGS. 16 to 19, the lip portion 67 of the inner peripheral surface of the oil seal 63, which is a seal member integrally held on the inner peripheral side of the retainer 62, is attached to the rotary shaft 44. By abutting on the outer peripheral surface, a seal is made between the outer peripheral surface and the rotary shaft 44, and an annular groove is formed on the mounting surface 64 of the retainer 62.
65 is provided, and an annular gasket 66 having a rectangular cross section is integrally held in the groove 65.

In addition, as shown in FIG. 13, in the case where the oil pan 42 is attached to a curved protruding portion, the retainer is
The lower surface of 62 is curved so as to match.

Even in this sealing device 60, since the mating mounting surface 43 is two surfaces that are orthogonal to each other, the shape of the gasket 66 is complicated, which increases the manufacturing cost, and is also careful in mounting. There was a problem that the sealing function could not be achieved unless the above precautions were taken.

Further, in any of the sealing devices 50 and 60, there is a problem that the retainers 52 and 62 are complicated in shape and the whole structure becomes expensive.

The present invention solves the above-mentioned problems of the conventional ones, and aims at a sealing device which is excellent in sealing property and assembling property, lightweight, compact, and inexpensive.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has 2
A sealing device that is formed of two members and has end faces of the respective members that are attached to the mounting surface of a fixed member that is formed on a substantially flat mounting surface and that seals between a rotating member that protrudes from the fixed member. And a plate-like retainer attached to the end surface of each member of the fixing member, and a connecting portion between the retainer and the end surface of each member of the fixing member, and a connecting portion between the respective members of the fixing member. A flat plate-shaped gasket having a convex portion that can be fitted to the groove corresponding to the groove formed in the above, and an oil seal attached to the retainer and sealing between the rotary member and the rotary member are adopted. It was done. In addition, a hermetic seal that is formed of two members and has end faces of the respective members that are attached to the mounting surface of a fixed member that is formed on the mounting surface of substantially the same plane and that seals between a rotating member that projects from the fixed member. A device, wherein a plurality of portions of an outer peripheral portion are formed in a thick portion, and a retainer in which an end face of the thick portion forms a mounting surface for the fixing member, and the rotating member attached to the retainer are provided. A first gasket for sealing between an oil seal for sealing and an end face of each member of the fixing member provided on the retainer, and formed on a connecting portion between each member of the fixing member provided on the retainer And a second gasket that can be located in the groove to be formed. Further, a means in which a hole penetrating the retainer is formed in the thick portion of the retainer with the fixing member is adopted. The retainer portion to which the first gasket is attached employs a means that projects more than other portions.

[Action]

By adopting the above-mentioned means, the present invention provides a fixing member by arranging a gasket and a retainer on the end surfaces (mounting surfaces) of two members of the fixing member in that order and fixing them to the fixing member side with bolts or the like. The retainer and the retainer are sealed, and the retainer and the rotating member are sealed by attaching an oil seal to the retainer. Since the convex portion that can be matched with the groove is provided at the portion of the gasket corresponding to the groove formed in the connecting portion between the two members of the fixing member, the mounting surface of the fixing member formed by the two members is Even if they are not completely in the same plane, it is possible to satisfactorily seal between the fixing member and the retainer, and it is possible to reliably prevent leakage from the groove.

〔Example〕

Hereinafter, an embodiment of the present invention shown in the drawings will be described.

1 to 3 show a first sealing device according to the present invention.
Is shown and the sealing device 20 shown in this embodiment is
Is a retainer 5 attached to the fixing members 1 and 2, a gasket 9 interposed between the fixing members 1 and 2 and the retainer 5, and a rotating shaft 3 through which the retainer 5 and the fixing members 1 and 2 are inserted.
And an oil seal 8 attached between

The fixing members 1 and 2 are connected to an engine block 1 in which a rotary shaft 3 such as a crankshaft is inserted through an internal space, on the lower surface side of the engine block 1 through an oil pan gasket 11, and have a lubricating oil inside. And a cup-shaped oil pan 2 for storing the oil.

The edge of the oil pan 2 projects in the horizontal direction, and the tip of the oil pan 2 further hangs downward, and the end surface 1a of the engine block 1 (the mounting surface of the sealing device 20) is located there.
And a drooping surface 2a (mounting surface of the sealing device 20) that is substantially flush with the above.

The lower surface 2a of the oil pan 2 and the end surface of the engine block 1
Ideally, 1a is preferably formed on the same plane, but it is actually difficult to form 1a on the same plane due to problems such as manufacturing cost and assembly accuracy. Therefore, the groove portion 12 corresponding to the shape of both is often formed in the connecting portion of both.

Retainer mounting holes 4, 4, ... Are provided at predetermined intervals on the end surface 1a of the engine block 1 and the vertical bottom surface 2a of the oil pan 2.

The retainer 5 is formed in a shape and a size that match the end surface 1 a of the engine block 1 and the vertical bottom surface 2 a of the oil pan 2. A hole 6 for inserting the rotating shaft 3 is formed in the center of the retainer 5. The holes of the retainer 5 corresponding to the holes 4, 4, ... For attaching the retainer are formed with holes 7, 7, ..

An annular oil seal 8 is fitted in the hole 6 of the retainer 5. The oil seal 8 has its inner peripheral side in contact with the peripheral surface of the rotary shaft 3. Therefore, when the rotary shaft 3 rotates, the inner peripheral side of the oil seal 8 makes sliding contact with the peripheral surface of the rotary shaft 3 to seal the two.

The gasket 9 is formed in a shape and size that match the end surface 1a of the engine block 1 and the vertical bottom surface 2a of the oil pan 2. Gasket 9 corresponding to hole 6 of retainer 5
A hole 9a for inserting the rotary shaft 3 is formed in the part of FIG. 4 and a hole for inserting a bolt or the like in the part of the gasket 9 corresponding to the holes 7, 7, ... No) is drilled. In a portion of the gasket 9 corresponding to the groove portion 12 formed in the connecting portion between the engine block 1 and the oil pan 2, a convex portion 9d having a shape and size that can match the groove portion 12 is integrally provided.

Then, in order to attach the sealing device 20 according to this embodiment including the retainer 5, the oil seal 8 and the gasket 9 configured as described above to the engine block 1 and the oil pan 2 which are the fixing members, the end surface of the engine block 1
The gasket 9 and the retainer 5 are located in that order on the vertical surface 2a of the oil pan 1a and the oil la, and the holes 7, 7 ...
... and a hole (not shown) in the gasket, insert a bolt or the like, and attach the tip of the bolt or the like to the end surface 1a of the engine block 1.
Then, the gasket 9 and the retainer 5 are fixed to the engine block 1 and the oil pan 2 side by screwing into the retainer mounting holes 4, 4, ... Formed in the hanging bottom surface 2a of the oil pan 2. Then, the oil seal 8 is fitted into the hole 6 of the retainer 5, and the inner peripheral side thereof is brought into contact with the peripheral surface of the rotating shaft 3.

In this way, the gasket 9, the retainer 5, and the oil seal 8 are attached to the fixed members 1 and 2 to form the sealing device 20 according to this embodiment.

In the sealing device 20 according to this embodiment configured as described above, since the end surface 1a of the engine block 1 and the hanging bottom surface 2a of the oil pan 2 are formed in substantially the same plane,
The retainer 5 and the gasket 9 can be formed into a flat plate having a simple shape. Therefore, retainer 5
Also, the manufacturing of the gasket 9 is simplified, and the manufacturing cost can be significantly reduced. Further, even if the end surface 1a of the engine block 1 and the vertical bottom surface 2a of the oil pan 2 cannot be formed on the same plane due to a problem of assembling accuracy, even if the groove portion 12 is formed in the connecting portion of both, Since the gasket 9 is provided with the convex portion 9d that can conform to this, there is no possibility of leakage or the like from the portion corresponding to the groove portion 12, and good sealing performance can be obtained.

4 and 5 show other examples of the engine block and the oil pan.

The end face 21a of this engine block 21 and the oil pan 22
The mounting surface formed with the hanging bottom surface 22a of the above is substantially in the same plane, and holes 24, 24 for mounting the retainer are provided at a predetermined interval, and the oil pan Since the hanging surface 22a of 22 is formed by bending, the groove portion is always formed in the connecting portion with the engine block 21.
23 will be formed.

Also, the engine block 21 shown in FIG. 6 and FIG.
The oil pan 22 and the oil pan 22 are the same except for the shape of the oil pan 22 shown in FIG. 4 and FIG.

Then, the sealing device of the second embodiment for mounting and sealing the mounting surface of the engine block 21 and the oil pan 22 shown in FIGS. 4 and 5 or 6 and 7 for sealing.
30 is shown in FIGS. 8-10.

That is, in the sealing device 30 shown in this embodiment,
An oil seal 38 that seals with the rotating shaft 25 such as a crankshaft, the engine block 21 and the oil pan 22.
It is composed of an expanded-diameter gasket 39 that seals the space between them, and a retainer 31 that holds the oil seal 38 and the gasket 39 and is attached to the engine block 21 and the oil pan 22.

The retainer 31 has a cylindrical cylindrical portion 32, and the cylindrical portion 32.
It is composed of a flange portion 33 which is integrally provided on the outer peripheral side of 32 and projects annularly outward in the radial direction, and a projection portion 34 which annularly projects radially inward is integrally provided at the tip of the cylindrical portion 32. The oil seal 38 is attached to the tip of the protrusion 34.

The end face 33a of the flange portion 33, that is, the outer edge portion of the end face of the retainer 31, is provided with a thick portion 35 at a predetermined interval.
Is formed, and the end face of the thick portion 35, that is, the upper surface in FIG. 12 is formed on the mounting surface 35a, and each thick portion 35 has a hole for a mounting bolt penetrating therethrough.
36, 36, ... are provided respectively.

Further, the cylindrical portion 32 is provided on the end surface 31a of the retainer 31.
A thick gasket molding surface 31a is formed to surround the
The gasket molding surface 31a projects from the end surface 33a of the retainer 31 and does not project from the mounting surface 35a.

Then, the gasket 3 is formed on the gasket molding surface 31a.
9 is provided, and the tip of the gasket 39 is in a state of protruding from the mounting surface 35a.

Furthermore, a gasket 37 having a damming shape is provided at a position corresponding to the groove 23 of the connecting portion between the engine block 21 and the oil pan 22 shown in FIGS. 4 and 5 or 6 and 7.
Is provided.

 In addition, X is a protruding position of the retainer casting die.

 Next, the operation of the above will be described.

First, FIGS. 4 and 5 or FIGS. 6 and 7
Holes 24, 24 provided in the engine block 21 and the oil pan 22 are located so that the gasket 39 contacts the mounting surfaces of the engine block 21 and the oil pan 22 shown in the figure.
And bolt holes 36, 3 provided in the thick wall 35 of the retainer 31.
6, and then match, and then secure with bolts.

In this case, since the tip end portion of the gasket 39 is projected more than each mounting surface 35a, each mounting surface 35a is composed of the end surface 21a of the engine block 21 and the vertical bottom surface 22a of the oil pan 22 while the gasket 39 is pressed. It comes into contact with the mounting surface.

Therefore, the engine block 21 and the oil pan 22
A gasket 39 is used to seal the interior of the shaft and an oil seal 38 is sealed to the rotary shaft 25, thereby ensuring hermeticity.

At the time of this sealing, another gasket 37 is provided at the portion of the retainer 31 corresponding to the groove portion 23 of the connecting portion between the engine block 21 and the oil pan 22, so that this gasket 37 is shown in FIG. ), As shown in (b)
Since it is located inside the groove 23, even if the groove 39 cannot be sufficiently sealed with the gasket 39 alone, it can be surely sealed.

Further, since the gasket 39 that abuts on the mounting surfaces of the engine block 21 and the oil pan 22 and seals has a large diameter, it has a large flexibility, and the sealability of the gasket 39 is good. Even if the gasket is disassembled, the damage to the gasket 39 is small, the usability is high, and even if the positioning is deviated from the mounting surface of the engine block 21 and the oil pan 22, it can be easily followed.

[Effect of device]

This device is configured as described in claim 1, so that
The retainer and the gasket attached to the end surface of the fixed member composed of two members can be formed in a simple flat plate shape. Therefore, the manufacturing of the retainer and the gasket is simplified, and the manufacturing cost can be significantly reduced. Further, even if a groove is formed in the connecting portion of the two members constituting the fixing member, since the convex portion that can match the groove is provided at the gasket portion corresponding to the groove, the assembly can be done without any nerve. By simply fixing the retainer and the gasket to the mating member, good sealing performance can be obtained.

Further, by virtue of the configuration as claimed in claim 2, the gasket can be formed in a diameter-expanded shape. Therefore, the bending amount of the gasket is increased, the assembling property is improved, the gasket can be repeatedly used, and even if the assembly position with respect to the fixing member is deviated, it can be easily followed. Will be able to be assembled. Even if a groove is formed in the connecting portion between the two members that form the fixing member, the second gasket that can be positioned in the groove is provided, so that the assembly can be performed easily without any nerve. It has an excellent effect that the sealing property can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view showing a state in which the sealing device of the first embodiment according to the present invention is attached, FIG. 2 is a schematic view showing a fixing member to which the sealing device shown in FIG. 1 is attached, and FIG. FIG. 4 is a cross-sectional view of what is shown in FIG. 1, and is an explanatory view showing the relationship between a fixing member and a sealing device, FIGS. 4 and 5 are schematic diagrams showing other fixing members, FIGS. 6 and 7. FIG. 8 is a schematic view showing still another fixing member, FIG. 8 is a schematic view showing a second embodiment of the sealing device according to the present invention, and FIG.
FIG. 10 is a sectional view taken along the line YY of FIG.
FIG. 11 is a sectional view taken along line C, FIG.
FIG. 3A is a cross-sectional view showing the relationship with the gasket of FIG.
Is a schematic view showing the whole, (b) is a sectional view taken along line BB, FIGS. 12 and 13 are schematic views showing a conventional fixing member, and FIGS. 14 and 15 are examples of a conventional sealing device. FIG. 14 is a schematic view showing the whole, FIG. 15 is a schematic sectional view, and FIGS. 16 to 19 show another example of a conventional sealing device. FIG. 16 is a schematic view showing the whole, FIG. 17 is a bottom view of FIG. 16, FIG. 18 is a sectional view taken along the line AA of FIG. 19, and FIG. 19 shows a retainer and a gasket. It is a partial expanded sectional view showing a mounting part. 1, 21, 41 …… Engine block 1a, 21a, 33a …… End face 2, 22, 42 …… Oil pan 2a, 22a …… Vertical bottom face 3, 25, 44 …… Rotating shafts 4, 6, 7, 9c, 24,36 …… Hole 5,31,52,62 …… Retainer 8,38,55,63 …… Oil seal 9,37,39,51,66 …… Gasket 9d …… Convex section 10,20,30, 50, 60 …… Sealing device 11 …… Oil pan gasket 12, 23 …… Groove part 32 …… Cylindrical part 33 …… Flange part 34 …… Projection part 35 …… Thick part 31a …… Gasket molding surface 35a, 43, 54, 64 …… Mounting surface 53 …… Inner peripheral surface 56,67 …… Lip part 65 …… Groove

Claims (4)

(57) [Scope of utility model registration request] 1. A fixing member (1) which is formed from two members and whose end faces are attached to said mounting faces of fixing members (1) and (2) formed on substantially the same mounting face. A sealing device for sealing between a rotary member (3) protruding from (2) and a flat plate-like retainer (5) attached to an end surface of each member of the fixing members (1) and (2), A groove portion which is interposed between the retainer (5) and the end surface of each member of the fixing members (1) and (2) and which is formed in a connecting portion between each member of the fixing members (1) and (2). A seal is provided between the rotary member (3) and the flat gasket (9) having a convex portion (9d) which can be fitted to the portion corresponding to (12) and the retainer (5). An oil seal (8) for controlling the sealing device. 2. A fixing member (21) which is formed of two members, and whose end faces are formed on the mounting faces of substantially the same plane and which are attached to the mounting faces of the fixing members (21) (22). A sealing device for sealing between a rotary member (25) protruding from (22), wherein a plurality of locations on the outer peripheral portion are formed in a thick portion (35), and the end face of the thick portion (35) is used to A retainer (31) having a mounting surface (35a) for the fixing members (21, 22), and an oil seal (38) attached to the retainer (31) to seal between the rotating member (25). A first gasket (39) provided on the retainer (31) to seal the end surfaces of the respective members of the fixing members (21) and (22), and the first gasket (39) provided on the retainer (31) to fix the same. A second gas that can be located in a groove (23) formed in a connecting portion between the members (21) (22). A sealing device comprising a ket (37). 3. A fixing member (21) (2) for the retainer (31).
The sealing device according to claim 2, wherein a hole (36) penetrating the thick portion (35) and the thick portion (35) is formed. 4. The sealing device according to claim 2, wherein a portion (31a) of the retainer (31) to which the first gasket (39) is attached projects more than other portions.