JPH0738768Y2 - Sealing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial 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, in a sealing device which is provided between a rotating shaft such as a crankshaft of an engine and a fixing member and seals between them, as shown in FIGS. 28 and 29, a fixing member (not shown) is used. The oil seal 75 is fitted to the inner peripheral surface 73 of the retainer 72 which is attached via the gasket 71, and the lip portion 76 of the inner peripheral surface of the oil seal 75 is attached to the outer periphery of the rotating shaft (not shown). By abutting against the surface, the gap between the rotary shaft (not shown) and the fixed member (not shown) is sealed by the gasket 71.

However, in the conventional sealing device as shown above, the retainer 72 attached to the fixed member, the oil seal 75 for sealing the outer peripheral surface of the rotating shaft, and the gasket 71 for sealing the fixed member are provided. Since it is composed of a large number of parts, it is necessary to assemble each of the constituent parts separately, which causes a problem that it takes a lot of time and effort for assembling and the maintenance becomes complicated. .

Furthermore, since the oil seal 75 was mounted by fitting it to the retainer 72, the strength of the mounting portion of the oil seal 75 must be increased, which increases the thickness of the mounting portion of the oil seal 75. As a result, the weight of the whole is increased, and it becomes impossible to reduce the weight and size of the whole.

In addition, as means for solving the above problems,
A sealing device as shown in FIG. 33 to FIG. 33 has been devised, and this sealing device has an oil seal 83 on the inner peripheral side of the retainer 82.
Is integrally held, an annular groove 85 is provided on the attachment surface 84 of the retainer 82 to the fixing member, and an annular gasket 86 having a rectangular cross section is integrally held in the groove 85.

In the case of this sealing device, since the oil seal 83 and the gasket 86 are integrally held by the retainer 82, it is not necessary to assemble the individual component parts separately, and the complexity at the time of assembly is solved.

However, since the gasket 86 is formed in a rectangular cross section, it lacks in flexibility, which makes it difficult to deform the gasket 86 during assembly, resulting in a problem that assembly workability becomes extremely poor. Had.

Furthermore, since a large amount of force is applied to bend the gasket 86 during assembly, the internal stress of the gasket 86 increases, which makes it impossible to thin the mounting portion of the gasket 86 and increase the overall weight. Therefore, there is a problem in that the overall weight and size cannot be reduced, and the versatility is reduced.

Further, since it takes a lot of time to attach the gasket 86 to the retainer 82 integrally, there is a problem in that it becomes expensive as a whole.

The present invention solves the above-mentioned problems of the conventional one, and an object thereof is to provide a sealing device which is excellent in sealing property and assembling property, lightweight, compact, and inexpensive. Is.

[Means for solving problems]

In order to solve the above problems, the present invention provides a sealing device that seals between a fixed member and a rotary member that is inserted through a bore provided in the fixed member, and includes a radial surface of the fixed member. A holding member attached to a pedestal portion extending in the axial direction of the rotating member from the fixed member, and an oil seal provided on the inner peripheral side of the holding member and slidingly contacting the rotating member,
The holding member includes a seal member provided on a mounting surface in contact with a radial surface of the fixed member and abutting on the radial surface of the fixed member and the pedestal portion, and the seal member is inclined toward an outer diameter side and The sealing member is held inside a groove provided on the mounting surface of the holding member, and the tip end portion of the sealing member protrudes toward the fixed member side from the mounting surface of the holding member and the pedestal portion of the holding member. When the holding member is attached to the fixing member, the sealing member protrudes closer to the pedestal side than the contact surface, and the sealing member is provided on the radial surface of the fixing member. The means for contacting the facing surface facing the rotating member is adopted.

A sealing device for sealing between a fixed member and a rotary member inserted through a bore provided in the fixed member, wherein the radial surface of the fixed member and the axial direction of the rotary member from the fixed member. A holding member attached to the extending pedestal portion,
An oil seal, which is provided on the inner peripheral side of the holding member and is in sliding contact with the rotating member, and a mounting surface of the holding member, which is in contact with the radial surface of the fixed member, are provided on the radial surface of the fixed member and the pedestal portion. When the holding member is attached to the fixing member, the sealing member is provided with an abutting sealing member, and the sealing member is provided on the radial surface of the groove and the pedestal portion provided on the inner end side of the inner peripheral side attachment portion of the fixing member. The means for contacting the facing surface facing the rotating member is adopted.

A sealing device for sealing between a fixed member and a rotary member inserted through a bore provided in the fixed member, wherein the radial surface of the fixed member and the axial direction of the rotary member from the fixed member. A holding member attached to the extending pedestal portion, an oil seal provided on the inner peripheral side of the holding member and slidingly contacting the rotating member, and a fixing member provided on a mounting surface of the holding member in contact with a radial surface of the fixing member. A sealing member that abuts the radial surface of the member and the pedestal portion, and when the holding member is attached to the fixing member, the sealing member has an inner circumference of a protrusion provided on the radial surface of the fixing member. The means for contacting the surface and the facing surface of the pedestal portion facing the rotating member are adopted.

The sealing member is formed in an annular shape and has an enlarged shape in which the diameter is gradually increased toward the contact portion of the fixing member with respect to the mounting portion, and the tip end portion is formed in a square shape. The seal member may be formed in an annular shape and in an enlarged shape in which the diameter is gradually increased toward the contact portion of the fixing member with respect to the mounting portion, and the tip end portion is formed in a round shape. The sealing member may be a means having a tubular shape and a projection part projecting radially outward is integrally provided on a part of the outer peripheral surface thereof.

[Action]

This invention adopts the above-mentioned means, so that the rotary member is sealed with an oil seal and the fixed member is sealed with a seal member. At this time, the tip of the seal member is formed into a square shape or a round shape. By forming the sealing member, it is possible to improve the sealing property with the fixing member, and it is also possible to improve the sealing property by providing a protrusion on the outer peripheral side of the sealing member. Since the seal member is integrally held by the holding member, the assembling workability is improved, and the mounting portion of the oil seal and the seal member can be thinned and the overall weight can be reduced.

〔Example〕

 An embodiment of the present invention shown in the drawings will be described below.

1 to 4 show an embodiment of the sealing device according to the present invention. FIG. 1 is a schematic view showing the whole, and FIG. 2 is a sectional view taken along the line AO of FIG. 3 is a sectional view taken along the line BB of FIG. 1, and FIG. 4 is a partially enlarged sectional view of what is shown in FIG.

That is, the sealing device shown in FIGS. 1 to 4 is a sealing member that seals between an oil seal 1 that seals a rotating shaft such as a crankshaft, which is a rotating member, and a fixed member such as an engine body. While holding the gasket 6 that is, the oil seal 1 and the gasket 6,
The retainer 9 is a holding member attached to the fixing member.

The retainer 9 has a cylindrical cylindrical portion 10 and the cylindrical portion 10.
It is composed of a flange portion 11 which is integrally provided on the outer peripheral side of the ring member 10 and which annularly projects outward in the radial direction, and a projection portion 12 which annularly projects radially inward at the tip of the cylindrical portion 10.
Is integrally provided, and the oil seal 1 is integrally provided at the tip of the protruding portion 12.

Further, the end surface of the flange portion 11 serves as a mounting surface 13 for mounting on a fixing member such as an engine main body, and a groove portion 14 is provided in the mounting surface 13, and the gasket 6 is provided in the groove portion 14. Can be attached.

Further, a bolt hole 1 for attaching the retainer 9 to a fixing member such as an engine body is provided on the outer peripheral side of the groove portion 14.
5, 15, ... Are drilled at predetermined intervals.

The shape of the retainer 9 is determined according to the shape of the fixing member.
As shown in the figure, since the mounting portion 22 of the fixing member 21 is formed of the semi-elliptical projecting portion 23 and the flat pedestal portion 24 that is integrally provided at the lower end portion thereof, the fitting portion 22 is made to match it. Is formed in a semi-elliptical shape, and the groove portion 14 provided in the retainer 9 is also formed in a semi-elliptical shape.

As shown in FIG. 4, the oil seal 1 has an annular shape, and an annular attachment portion 2 having a substantially U-shaped cross section for attaching to the protruding portion 12 of the cylindrical portion 10 of the retainer 9 is provided on the outer peripheral side. A lip portion 3 is integrally provided on the inner peripheral side so as to project annularly inward in the radial direction, and an annular spring 4 is provided on the outer side of the lip portion 3.
Is provided.

Then, the lip portion 3 is brought into contact with the outer peripheral surface of the rotary shaft 25 shown in FIG. 5 and is strongly tightened by the spring 4, so that the gap between the lip portion 3 and the rotary shaft 25 can be completely sealed. .

The gasket 6 has an annular shape and is formed in an enlarged shape in which the diameter gradually increases toward the outer side in the radial direction as the distance from the bottom surface 16 of the groove portion 14 of the retainer 9 increases. In this embodiment, it is formed in a semi-elliptical shape in conformity with the shape of the mounting portion 22 of the fixing member 21 shown in FIG.

It should be noted that the tip portion 7 having the maximum diameter of the gasket 6 projects outward from the mounting surface 13 of the flange portion 11 of the retainer 9 and the upper surface of the projecting portion 23 of the fixing member 21.
A sealing surface 6a that abuts against 23a and seals between the protruding portion 23 and a lower surface 17 that is the lower end surface of the lower end portion of the flange portion 11 of the retainer 9 and that protrudes downward, The pedestal portion 2 is brought into contact with the upper surface 24a of the pedestal portion 24.
4 and a sealing surface 6b that seals the space between them.

Next, the operation of what is shown above will be described.

To seal between the rotary shaft 25 such as a crankshaft having a shape as shown in FIG. 5 and the fixed member 21 such as the engine body using the sealing device configured as described above, first,
The lip portion 3 of the oil seal 1 provided integrally with the retainer 9 is brought into contact with the outer peripheral surface of the rotating shaft 25, and is strongly tightened to the outer peripheral surface of the rotating shaft 25 by the spring 4 provided on the outer periphery thereof. .

Next, the seal surface 6a of the tip end portion 7 of the gasket 6 is integrally provided in the groove portion 14 of the flange portion 11 of the retainer 9 and the upper surface 23 of the protruding portion 23 of the mounting portion 22 of the fixing member 21.
While abutting on a, the sealing surface 6b is fixed to the fixing member 21.
Abutment against the upper surface 24a of the pedestal portion 24 of the mounting portion 22, and a bolt (not shown) is inserted through the bolt holes 15, 15, .. 27,
The retainer 9 is attached to the attachment portion 22 of the fixing member 21 by screwing a bolt (not shown) onto 27, ...

Note that one of the bolt holes 15, 15, ... Is a hole for positioning.

In this case, the tip end portion 7 of the gasket 6 has a mounting surface 13 and a flange portion 11 of the flange portion 11 of the retainer 9.
Since it is formed so as to project outward from the lower surface 17 located at the lower end of the fixing member 21, the tip end portion 7 of the gasket 6 is fixed to the upper surface 23a of the projecting portion 23 of the mounting portion 22 of the fixing member 21 and the pedestal portion. The upper surface 24a of 24 can be strongly brought into contact with the upper surface 24a, so that the gasket 6 completely seals between the fixing member 21 and the upper surface 24a.

In addition, since the gasket 6 is formed in an enlarged shape that gradually expands outward in the radial direction as it goes to the tip end, the bending characteristics of the gasket 6 can be improved, and the workability during assembly is improved. Become.

Further, since the oil seal 1 is integrally provided on the protrusion 12 on the inner peripheral side of the cylindrical portion 10 of the retainer 9, the oil of the retainer can be inserted to fit and attach the oil seal as in the conventional case. It is no longer necessary to increase the strength by forming a thick wall portion of the seal mounting portion.

Therefore, the mounting portion of the oil seal 1 can be made thin, which makes it possible to reduce the weight as a whole and also to make it compact.

In the sealing device according to this embodiment, the oil seal 1 for sealing with the rotary shaft and the gasket 6 for sealing with the fixed member are integrally incorporated in the retainer 9, so that individual parts are separately provided. Since it is not attached, workability at the time of assembly can be significantly improved.

FIG. 6 shows a second embodiment of the sealing device according to the present invention.

In the sealing device shown in this embodiment, the shape of the tip of the gasket is formed into a square shape, and since the other structure has the same structure as that of the first embodiment, The same parts as those shown in the first embodiment are designated by the same reference numerals, and the detailed description of the structure will be omitted.

Even when the sealing device shown in this embodiment is used between the rotary shaft 25 and the fixed member 21 shown in FIG. 5, the same effect as that shown in the first embodiment is obtained. .

In the case of this embodiment, since the tip portion 7 of the gasket 6 is formed into a square shape, the mounting portion 22 of the fixing member 21 is
The seal between the upper surface 23a of the protrusion 23 of the
It will be sealed by the protrusion 6c of the tip part 7 of
Further, the space between the mounting portion 22 of the fixing member 21 and the upper surface 24a of the pedestal portion 24 is sealed by the protrusion 6d of the tip portion 7 of the gasket 6.

FIG. 7 shows a third embodiment of the sealing device according to the present invention.

In the sealing device shown in this embodiment, the tip portion of the gasket is formed into a round shape, and other configurations are the same as those of the first embodiment.
Since it has the same configuration as that of the first embodiment, the same parts as those of the first embodiment will be denoted by the same reference numerals and detailed description of the configuration will be omitted. To do.

When the sealing device shown in this embodiment is used between the fixing member 21 and the rotary shaft 25 shown in FIG. 5, the same effect as that shown in the first embodiment is obtained. .

In the case of this embodiment, the tip portion 7 of the gasket 6 is
Since the shape of the fixing member 21 is formed into a round shape, the fixing member 21 has a space between the mounting portion 22 and the upper surface 23a of the protrusion 23 and the fixing member 21.
The space between the mounting portion 22 and the upper surface 24a of the pedestal portion 24 is sealed by the contact of the sealing surface 6e of the tip portion 7 of the gasket 6.

8 to 11 show a fourth embodiment of the sealing device according to the present invention, and FIG. 8 is a schematic view showing the whole,
8 is a sectional view taken along the line C--O of FIG. 8 and FIG.
FIG. 11 is a sectional view taken along the line DD in FIG. 11, and FIG. 11 is a partially enlarged sectional view of that shown in FIG.

That is, the sealing device shown in this embodiment has the retainer 9
The gasket 6 is directly attached to the mounting surface 13 of the first embodiment without providing a groove portion, and the other configurations are the same as those shown in the first embodiment. The same parts as those shown in the example are designated by the same reference numerals, and detailed description of the configuration will be omitted.

When the sealing device shown in this embodiment is used to seal between the fixing member 31 and the rotary shaft 35 as shown in FIG. 12, a half length provided in the mounting portion 32 of the fixing member 31 is used. The bottom surface 33a of the circular groove portion 33 is brought into contact with the sealing surface 6a of the tip portion 7 of the gasket 6, and the top surface 34a of the pedestal portion 34 located at the lower end portion of the groove portion 33 seals the tip portion 7 of the gasket 6. By bringing the surfaces 6b into contact with each other, the gap with the fixing member 31 is sealed.

The sealing device shown in this embodiment also has the same effect as that shown in the first embodiment.

In this embodiment as well, as in the second embodiment shown in FIG. 6 and the third embodiment shown in FIG. 7, the tip portion 7 of the gasket 6 is formed into a square shape or a round shape. Then, the shape of the tip portion 7 of the gasket 6 may be changed according to the finishing accuracy of the mounting surface of the mounting portion, the surface pressure required at the time of mounting, and the like.

A fifth embodiment of the sealing device according to the present invention is shown in FIGS. 13 to 15, and FIG.
The figure is a cross-sectional view taken along the line EO of what is shown in FIG. 13, and FIG.
It is the FF sectional view taken on the line of a figure.

That is, the sealing device shown in this embodiment has the retainer 9
The gasket 6 is directly attached to the mounting surface 13 of the retainer 9 without providing a groove, and the flange portion 11 of the retainer 9 is attached to the mounting portion 42 of the fixing member 41 having the shape shown in FIG. The lower end portion of the gasket 6 is formed by curving downward, and the lower end portion of the gasket 6 integrally provided on the mounting surface 13 of the retainer 9 is also curved downward. Since it has the same structure as that of the first embodiment, the same parts as those of the first embodiment are designated by the same reference numerals and detailed description of the structure is omitted. It shall be.

The sealing device shown in this embodiment also exhibits the same effect as that of the first embodiment.

In the case of this embodiment, the tip portion 7 of the gasket 6 is
The sealing surface 6a of the gasket abuts on the bottom surface 43a of the groove portion 43 of the mounting portion 22 of the fixing member 41 shown in FIG. 16, and the sealing surface 6b of the tip end portion 7 of the gasket 6 contacts the curved upper surface 44a of the pedestal portion 44. By contacting with each other, the gap with the fixing member 41 is sealed.

Also in this embodiment, the tip portion 7 of the gasket 6 is formed into a square shape or a round shape as in the second embodiment shown in FIG. 6 and the third embodiment shown in FIG. Then, it may be changed according to the finishing accuracy of the mounting surface of the mounting portion and the surface pressure required at the time of mounting.

FIG. 17 to FIG. 20 show a sixth embodiment of the sealing device according to the present invention, and FIG. 17 is a schematic view showing the whole,
17 is a sectional view taken along the line I--O of FIG. 17, and FIG.
FIG. 20 is a sectional view taken along the line JJ of the drawing, and FIG. 20 is a partially enlarged sectional view of the drawing shown in FIG.

That is, the sealing device shown in this embodiment is used for the fixing member 51 having a shape as shown in FIG.
Inner peripheral surface 53 of protruding portion 53 of mounting portion 52 of fixing member 51 shown in the figure
Between the a and the upper surface 54a of the pedestal 54, the tip portion 7 of the gasket 6 is
Is abutted against each other so as to seal the space between the fixing member 51 and the fixing member 51.
Since it has the same configuration as that of the first embodiment, the same parts as those of the first embodiment are designated by the same reference numerals, and the detailed description of the configuration will be omitted.

Also, in the sealing device shown in this embodiment, the gasket 6 is directly attached to the attaching surface 13 of the retainer 9 without providing a groove.

The embodiment shown in this embodiment also exhibits the same effect as that of the first embodiment. In this embodiment, the tip portion 7 having the maximum diameter of the gasket 6 is attached to the mounting portion 52 of the fixing member 51. By forming it to be slightly larger than the inner dimension thereof, the fitting at the time of mounting can be made tighter, so that the sealing performance can be improved.

FIG. 22 shows a seventh embodiment of the sealing device according to the present invention. In the sealing device shown in this embodiment, the gasket 6 is directly attached to the retainer 9 without providing a groove portion, and And the same configuration as that shown in the first embodiment, except that the outer peripheral side is integrally provided with a projecting portion 8 projecting annularly outward in the radial direction. Therefore, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description of the configuration will be omitted.

Then, the protruding portion 8 on the outer peripheral side of the tubular gasket 6
By contacting the inner peripheral side 53a of the protruding portion 53 of the mounting portion 52 of the fixing member 51 and the upper surface 54a of the pedestal portion 54 shown in FIG. 21, thereby sealing between the fixing member 51. In this case, the protruding amount of the protruding portion 8 is determined according to the shape of the mounting portion or the required surface pressure. The pressure can be increased and the sealing property can be improved.

Then, the one shown in this embodiment also exhibits the same effect as that shown in the first embodiment.

23 to 26 show an eighth embodiment of the sealing device according to the present invention, and FIG. 23 is a schematic view showing the whole structure,
23 is a sectional view taken along the line KO of FIG. 23, and FIG.
FIG. 26 is a sectional view taken along the line LL of FIG. 23, and FIG. 26 is a partially enlarged sectional view of that shown in FIG.

That is, the sealing device shown in this embodiment has the retainer 9
The gasket 6 is directly attached to the retainer 9 without forming a groove, and the lower end portion of the flange portion 11 of the retainer 9 is curved downward, and the lower end portion of the gasket 6 provided integrally with the retainer 9 is also downward. Since it is formed by bending it into a curved shape and has the same structure as the first embodiment in other respects, the same parts as those in the first embodiment are designated by the same reference numerals. A detailed description of the configuration will be omitted.

Then, the sealing device shown in this embodiment is used in a portion where the pedestal portion 64 is curved downward as shown in FIG. 27, and in this case, the protrusion of the mounting portion 62 of the fixing member 61 is projected. By fixing the distal end portion 7 of the gasket 6 to the inner peripheral surface 63a of the portion 63 and the upper surface 64a of the pedestal portion 64, the fixing member 61
It is designed to seal between and.

In this embodiment, the same effects as those of the first embodiment are exhibited, and in this embodiment, the tip portion 7 having the maximum diameter of the gasket 6 is slightly smaller than the inner dimension of the mounting portion. By forming a large size, the sealing property between the two is improved.

In this embodiment as well, it is needless to say that the shape of the tip of the gasket 6 may be changed to a square shape or a round shape depending on usage conditions.

[Effect of device]

The present invention has the following effects by being configured as claimed in claims 1, 2 and 3.

By providing an oil seal that is in sliding contact with the rotating member on the inner peripheral side of the holding member and a sealing member that abuts the radial surface of the fixing member and the pedestal portion on the mounting surface of the holding member to the fixing member, a sealing device It is not necessary to assemble each member separately when assembling, and it suffices to attach the holding member to the fixing member, so that the assembling workability is significantly improved.

Further, even if the pressing force of the seal member and the oil seal on the holding member is small, good sealing performance can be obtained. Therefore, it is possible to reduce the thickness of the mounting portion of the seal member and the oil seal of the holding member. It is possible to reduce the weight and the size of the whole.

Further, as in claim 1, the seal member is inclined toward the outer diameter side and provided in the groove of the mounting surface of the holding member. It is possible to make close contact with the radial surface and the pedestal part, and to increase the close contact force with respect to the fixing member by its own elastic force. Further, since the seal member is provided in the groove on the mounting surface of the holding member, the seal member is not crushed even if the holding member is strongly tightened to the fixing member, and the holding member can be removed and reattached during maintenance. Even in such a case, the seal member can be reused and stable sealing performance can be obtained for a long period of time.

Further, as described in claim 2, the seal member provided on the mounting surface of the holding member in contact with the radial surface of the fixing member is provided with the sealing member on the inner peripheral side mounting portion inner end side of the fixing member. By contacting the facing surface facing the rotating member, the seal member is not crushed even if the holding member is strongly tightened to the fixed member, and the holding member can be removed and reattached during maintenance. Even in such a case, the seal member can be reused and stable sealing performance can be obtained for a long period of time.

Further, according to claim 3, a seal member provided on a mounting surface of the holding member, which is in contact with a radial surface of the fixing member, is provided with a sealing member on the radial surface of the fixing member. Since the seal member is not crushed even if the holding member is strongly tightened to the fixing member, the holding member is removed and reattached during maintenance. Also,
The seal member can be reused, and stable sealing performance can be obtained for a long period of time.

Further, as in claims 4, 5 and 6, the tip end portion of the seal member is formed in an enlarged shape that expands radially outward, so that the surface pressure of the seal member with respect to the fixed member can be increased and the seal member Since the bending characteristic can be improved, the workability of assembling is improved.

[Brief description of drawings]

1 to 4 show a first embodiment of a sealing device according to the present invention, FIG. 1 is a schematic view showing the whole, and FIG. 2 is a sectional view taken along the line A--O of FIG. 3 is a sectional view taken along line BB of FIG. 1, FIG. 4 is a partially enlarged sectional view of what is shown in FIG. 1, and FIG. 5 is a schematic view showing a fixing member for mounting the sealing device shown in FIG. FIG. 6 is a partially enlarged sectional view showing a second embodiment of the sealing device according to the present invention, FIG. 7 is a partially enlarged sectional view showing a third embodiment of the sealing device according to the present invention, and FIGS. Figure 11 shows the fourth part of the sealing device according to this invention.
FIG. 8 is a schematic view showing the whole, FIG. 9 is a sectional view taken along the line C--O of FIG. 8, FIG. 10 is a sectional view taken along the line D--D of what is shown in FIG. FIG. 11 is a partially enlarged sectional view of what is shown in FIG. 8, FIG. 12 is a schematic view showing a fixing member to which the sealing device shown in FIG. 8 is attached, and FIGS. 13 to 15 are views of the sealing device according to the present invention. 5 shows an embodiment of the present invention, FIG. 13 is a schematic view showing the whole, FIG. 14 is a sectional view taken along the line EO of FIG. 13, and FIG. 15 is a sectional view taken along the line FF of what is shown in FIG. ,
FIG. 16 is a schematic view showing a fixing member to which the sealing device shown in FIG. 13 is attached, FIGS. 17 to 20 show a sixth embodiment of the sealing device according to the present invention, and FIG. 17 is a schematic view showing the whole. Figure, first
FIG. 18 is a sectional view taken along the line I-O of FIG. 17, and FIG.
FIG. 17 is a sectional view taken along the line JJ of FIG. 17, FIG. 20 is a partially enlarged sectional view of what is shown in FIG. 17, and FIG. 21 is a schematic view showing a fixing member for mounting the sealing device shown in FIG. Is a partially enlarged sectional view showing a seventh embodiment of the sealing device according to the present invention, FIGS. 23 to 26 show an eighth embodiment of the sealing device according to the present invention, and FIG. 23 is a schematic view showing the whole. , Fig. 24 shows
23 is a sectional view taken along the line KO of FIG. 23, FIG. 25 is a sectional view taken along the line LL of FIG. 23, FIG. 26 is a partially enlarged sectional view of that shown in FIG. 23, and FIG. A schematic view showing a fixing member for attaching the sealing device shown in the figures, FIGS. 28 and 29 show an example of a conventional sealing device, FIG. 28 is a schematic view showing the whole, and FIG. 29 is shown in FIG. Line sectional view of thing, 30th to 33rd
The figure shows another example of a conventional sealing device, FIG. 30 is a schematic view showing the whole, FIG. 31 is a bottom view of what is shown in FIG. 30, and FIG. 32 is a line H-H of what is shown in FIG. A sectional view, FIG. 33 is a partially enlarged sectional view of the one shown in FIG. 1, 75, 83 …… Oil seal 2, 22, 32, 42, 52, 62, 75 …… Mounting part 3,76,87 …… Lip part 4 …… Spring 6,71,86 …… Seal member (gasket ) 7 Tip part 8, 12, 23, 53, 63 ...... Projection part 9, 32, 72, 82 …… Holding member (retainer) 10 …… Cylindrical part 11 …… Flange part 13, 74, 84 …… Mounting surface 14, 33, 43 ...... Groove 15 ...... Bolt hole 16, 33a, 43a ...... Bottom surface 17 ...... Bottom surface 21, 31, 41, 51, 61 ...... Fixing member 23a, 24a, 34a ...... Top surface 24, 34, 44, 54, 64 ... Pedestal 25, 35, 45, ... Rotating shaft 27 ... Screw holes 53a, 63a ... Inner peripheral surface 44a, 64a ... Curved surface 85 ... Groove

Claims (6)

[Scope of utility model registration request] 1. A sealing device for sealing between a fixing member (21) and a rotating member (25) inserted through a bore provided in the fixing member (21), the sealing device comprising: Radial surface and the fixing member (21)
(24) extending in the axial direction of the rotating member (25) from the
Holding member (9) attached to the holding member and the holding member (9)
Is provided on the inner peripheral side of the oil seal (1) that is in sliding contact with the rotating member (25) and the mounting surface (13) that is in contact with the radial surface of the fixing member (21) of the holding member (9). A seal member (6) that abuts on the radial surface of the fixing member (21) and the pedestal portion (24) is provided, and the seal member (6) is inclined toward the outer diameter side and at the same time as the holding member (9). The seal member (6) is held inside a groove (14) provided in the mounting surface (13) and
A front end portion (7) of the holding member (9) protrudes toward the fixing member (21) side from the mounting surface (13) of the holding member (9) and abuts on the pedestal portion (24) of the holding member (9). When the holding member (9) is attached to the fixing member (21) so as to protrude from the surface (17) toward the pedestal portion (24), the sealing member (6) is arranged in the radial direction of the fixing member (21). A sealing device, which is in contact with a radial surface (23a) of a protrusion (23) provided on the surface and a facing surface (24a) of the pedestal portion (24) facing the rotating member (21). 2. A fixing member (31, 41) and the fixing member (31, 4).
Rotating members (35, 45) that pass through the bores provided in 1)
And a pedestal part extending in the axial direction of the rotating member (35, 45) from the radial surface of the fixing member (31, 41) and the fixing member (31, 41). A holding member (9) attached to the holding member (34) and the rotating member (35) provided on the inner peripheral side of the holding member (9).
Of the fixing member (31, 41) provided on the mounting surface (13) of the holding member (9) in contact with the radial surface of the fixing member (31, 41). A seal member (6) that comes into contact with the radial surface and the pedestal portion (34)
When the holding member (9) is attached to the fixing members (31, 41), the sealing member (6) is provided with the fixing members (31, 4).
The groove (3) provided on the inner end side of the inner peripheral side mounting part (32) of (1)
3) A sealing device, wherein the radial surface (33a, 43a) and the pedestal portion (34, 44) are in contact with the facing surface (34a, 44a) facing the rotating member (35, 45). 3. A fixing member (51, 61) and the fixing member (51, 6).
Rotating members (55, 65) that pass through the bores provided in 1)
And a pedestal portion extending in the axial direction of the rotating member (55, 65) from the radial surface of the fixing member (51, 61) and the fixing member (51, 61). Holding member (9) attached to 54, 64)
And an oil seal (1) provided on the inner peripheral side of the holding member (9) and in sliding contact with the rotating member (55, 65), and a diameter of the fixing member (51, 61) of the holding member (9). A holding member (9) provided with a seal member (6) provided on a mounting surface (13) in contact with the directional surface and in contact with the radial surface of the fixing member (51, 61) and the pedestal portion (54, 64); When the fixing member (51, 61) is attached to the fixing member (51, 61), the seal member (6) is fixed to the fixing member (51, 6).
1) The inner peripheral surface (53a, 63a) of the protrusion (53, 63) provided on the radial surface and the facing surface (53, 65) of the pedestal portion (54, 64) facing the rotating member (55, 65). 54a, 64a) abutting against the sealing device. 4. The seal member (6) has an annular shape and is attached to the fixing members (21) (31) (41) (51) (61) (22) (32) (42) (52). 4. The enlarged shape in which the diameter gradually increases toward the abutting portion with respect to the (62), and the tip portion (7) is formed into a square shape.
The sealing device described. 5. The seal member (6) has an annular shape and is attached to the fixing members (21) (31) (41) (51) (61) (22) (32) (42) (52). 4. The enlarged shape in which the diameter gradually increases toward the abutting portion with respect to the (62), and the tip portion (7) is formed into a round shape.
The sealing device described. 6. The sealing device according to claim 3, wherein the sealing member (6) has a tubular shape, and a projection (8) projecting outward in the radial direction is integrally provided on a part of an outer peripheral surface of the sealing member (6). .