JPH0744862Y2 - Sealing device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a sealing device, and in particular to
The present invention relates to a lightweight sealing device.

[Prior art and problems to be solved]

Conventionally, it is attached to a mating member such as an engine block,
As a sealing device that seals between a rotating shaft such as a crank shaft protruding from the sealing device, a sealing device as shown in FIG. 14 is known.

That is, in the conventional sealing device 41 shown in FIG. 14,
The retainer 42, which is located at the end of the engine block so as to cover the space of the mating member 44 such as the engine block, is fixed by bolts with a gasket interposed, and the mounting portion 45 at the center of the retainer 42. The oil seal 43 is provided inside, and the oil seal 43 seals the outer peripheral surface of the rotating shaft 49 projecting from the space of the engine block, and the outer peripheral surface of the rotary shaft 49 is attached to the mounting portion 45 of the retainer 42.
It is attached to the inner peripheral surface of.

In this case, the outer peripheral surface of the oil seal 43 is simply fitted and fixed to the inner peripheral surface of the cylindrical mounting portion 45 of the retainer 42.

For this reason, it is necessary to increase the strength of the mounting portion 45, the wall thickness becomes thicker, and it is difficult to make the whole small and lightweight.

It is an object of the present invention to provide a sealing device which eliminates the above-mentioned difficulties and can be made compact and lightweight as a whole.

[Means for Solving the Problems]

To achieve the above object, the present invention provides, as a first sealing device, a seal for sealing between a mating member such as an engine block and a rotating shaft such as a crankshaft protruding from an internal space of the mating member. The sealing device includes a retainer attached to the mating member and an oil seal, and the oil seal has an inner peripheral surface fitted to the rotary shaft and a seal portion abutting against the retainer. The elastic member has an annular reinforcing plate having an inner peripheral portion embedded in the elastic member, and the reinforcing plate is caulked and fixed to the retainer, whereby the oil seal and the retainer are integrated. The sealing device is characterized in that

As a second sealing device, the present invention is a sealing device for sealing between a mating member such as an engine block and a rotary shaft such as a crankshaft protruding from an internal space of the mating member. , A retainer attached to the fixed portion, and an oil seal, wherein the oil seal is
Elasticity having a slinger that can be fitted to the rotation shaft and has a disk-shaped upright portion integrally formed at one end, a lip portion that abuts the upright portion of the slinger, and a seal portion that abuts the retainer. Material and a reinforcing plate whose inner peripheral portion is embedded in an elastic material, and the reinforcing plate is caulked and fixed to the retainer, whereby the oil seal and the retainer are integrated. The sealing device is configured as follows.

As a third sealing device including a first sealing device and a second sealing device, the present invention provides a retainer with a hollow portion in which an oil seal can be located, and a caulking portion is provided on an inner circumference of the hollow portion. The oil seal is crimped and fixed by bending.

The present invention provides a fourth sealing device including a first and a second sealing device, wherein a hollow portion in which an oil seal can be located is formed in the retainer, and a caulking portion is provided at an inner periphery of the hollow portion at a predetermined interval. Is formed, and the oil seal is caulked and fixed by bending the caulked portion.

As a fifth sealing device including the first, second, third and fourth sealing devices, the present invention has a configuration in which the reinforcing plate is provided so as to be inclined with respect to the elastic material.

[Action]

By adopting the above means, the present invention allows the reinforcing plate of the oil seal to be caulked and fixed to the retainer simply by pushing the oil seal and then caulking it when mounting the oil seal on the retainer mounting part. Since it is possible, the retainer and the oil seal can be integrated,
Further, since the retainer is fixed by caulking, it can be sufficiently fixed even if the retainer mounting portion is formed thin.

In the case of an oil seal with a slinger, the retainer and oil seal can be fixed together simply by fitting the slinger onto the rotating shaft and then caulking and fixing the reinforcing plate at the retainer mounting part. can do.

In addition, since the reinforcing plate of the oil seal can be located at the mounting portion of the retainer, and the bendable crimp portion is provided in an annular shape, the retainer and the oil seal can be fixed simply by bending the crimp portion. You can

In this case, when the caulked portions are not annular and are formed at a predetermined interval, they can be fixed by bending each caulked portion.

If the reinforcing plate of the oil seal has a predetermined inclination, the retainer and the oil seal can be fixed in a state of having elasticity corresponding to this inclination.

〔Example〕

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

FIG. 1 shows a first embodiment of the sealing device according to the present invention, and the sealing device 1 includes a retainer 2 and an oil seal 3 as in the conventional device.

The retainer 2 is provided with holes 2a for fixing to a mating member 4 such as an engine block at a plurality of positions in the circumferential direction, and a mounting portion 5 for the oil seal 3 is provided at the central portion.

The mounting portion 5 of the oil seal 3 has a large diameter portion 5a that receives the reinforcing plate 6 of the oil seal 3 and a tapered portion 5b that is continuous inside the large diameter portion 5a, and the outer peripheral portion of the large diameter portion 5a. The caulking portion 7 is formed in an annular upright state, and the inlet side of the caulking portion 7 is formed into a tapered insertion guide portion 7a.

On the other hand, the oil seal 3 has an annular elastic member 8 having an inner peripheral surface having a lip portion 8a that abuts the rotating shaft 9 and the like, and the elastic member 8
And a ring-shaped reinforcing plate 6 having an inner peripheral portion buried in and a protruding outer peripheral portion, and the elastic member 8 is provided with a seal portion 8b protruding therefrom.

When attaching the oil seal 3 to the retainer 2 as described above, first, the oil seal 3 is located at the oil seal mounting portion 5 formed on the retainer 2, and the reinforcing plate 6 is attached to the insertion guide portion 7a of the caulking portion 7. When pushed in along, the reinforcing plate 6 comes into contact with the fixed end surface 5c, which is the end of the large diameter portion 5a, and further insertion is blocked, and at this time, the sealing portion 8b is retained by the retainer 2
It comes into contact with the tapered portion 5b in a pressed state.

Therefore, when the caulking portion 7 is caulked inward in this state, the oil seal 3 is fixed while the reinforcing plate 6 is sandwiched.

As a result, the oil seal 3 is attached to the retainer 2.
Will be reliably and fixed in place.

FIG. 2 shows a second embodiment of the present invention. The sealing device 11 shown in this embodiment is also fixed to a mating member 14 such as an engine block, and the retainer 12 is the same as the above embodiment. Is the same as that shown in.

On the other hand, the oil seal 13 includes a slinger 20 which is fitted on the outer side of the rotating shaft 19 and rotates integrally with the slinger 20, and a rising portion of the slinger 20.
An annular elastic member 18 having a lip portion 18a that abuts 20a,
The elastic member 18 is integrally provided with the reinforcing plate 16 having an outer peripheral portion protruding.
The seal portion 18b is provided so as to protrude.

When installing the oil seal 13 on the retainer 12 as described above, first set the slinger 20 of the oil seal 13 on the rotary shaft 19
To fit.

Next, when the elastic member 18 and the reinforcing plate 16 are located at the mounting portion 15 of the oil seal 13 formed on the retainer 12 and the reinforcing plate 16 is pushed in along the caulking portion 17, the reinforcing plate 16 ends at the end of the large diameter portion 15a. The fixed end surface 15c, which is a portion of the retainer 12, is prevented from further insertion. At this time, the seal portion 18b abuts the tapered portion 15b of the retainer 12 in a pressed state.

Therefore, when the caulking portion 17 is caulked inward in this state, the oil seal 13 is fixed while the reinforcing plate 16 is sandwiched.

As a result, the oil seal 13 is attached to the retainer 12.
Will be reliably and fixed in place.

The contact state between the rising portion 20a of the slinger 20 and the lip portion 18a of the elastic member 18 of the oil seal 13 is adjusted in advance.

FIG. 3 shows a third embodiment of the sealing device according to the present invention.

The sealing device 21 shown in this embodiment is basically the same as that shown in FIG. 1, and the same members are denoted by the same reference numerals and detailed description thereof is omitted.

The retainer 2 shown in this embodiment has a large-diameter portion 5a and a small-diameter portion 5e in the mounting portion 5 of the oil seal 3 and has a large-diameter portion.
A flat surface 5d is formed between 5a and the small diameter portion 5e.

On the other hand, the oil seal 3 includes an annular elastic member 8 having a lip portion 8a on the inner peripheral surface thereof, and an annular reinforcing plate 6 having the inner peripheral portion embedded in the elastic member 8. A seal portion 8b that abuts the flat surface 5d of the retainer 2 is provided.

When attaching the oil seal 3 to the retainer 2 configured as described above, first attach the oil seal 3 to the retainer 2.
When the reinforcing plate 6 is located along the caulking portion 7 and is located at the mounting portion 5 of the oil seal 3 formed in the above, the reinforcing plate 6 contacts the fixed end surface 5c which is the end portion of the large diameter portion 5a, and The insertion is blocked, and at this time, the seal portion 8b abuts against the flat surface 5d of the retainer 2 in a pressed state.

Therefore, when the caulking portion 7 is caulked inward in this state, the oil seal 3 is fixed while the reinforcing plate 6 is sandwiched.

As a result, the oil seal 3 is attached to the retainer 2.
Will be reliably and fixed in place.

FIG. 4 shows a fourth embodiment of the sealing device according to the present invention.

The sealing device 31 shown in this embodiment is basically the same as that shown in FIG. 2, and the same members are denoted by the same reference numerals and detailed description thereof is omitted.

The retainer 12 shown in this embodiment has a large diameter portion 15a and a small diameter portion 15e in the mounting portion 15 of the oil seal 13, and a flat surface 15d is formed between the large diameter portion 15a and the small diameter portion 15e. Has been done.

On the other hand, the oil seal 13 is a slinger 20 which is fitted on the rotating shaft 19 and rotates integrally with the rotating shaft 19, and a rising portion 20a of the slinger 20.
An annular elastic material 18 having a lip portion 18a for sealing with,
The elastic member 18 is integrally provided with the reinforcing plate 16 having an outer peripheral portion protruding.
Includes a seal portion 18b that abuts the flat surface 15d of the retainer 12.
Is provided.

When installing the oil seal 13 on the retainer 12 as described above, first set the slinger 20 of the oil seal 13 on the rotary shaft 19
To fit.

Next, when the elastic member 18 and the reinforcing plate 16 are located at the mounting portion 15 of the oil seal 13 formed on the retainer 12 and the reinforcing plate 16 is pushed in along the caulking portion 17, the reinforcing plate 16 ends at the end of the large diameter portion 15a. The fixed end surface 15c, which is a portion of the retainer 12, is abutted against the fixed end surface 15c, and further insertion is prevented. At this time, the seal portion 18b abuts against the flat surface 15d of the retainer 12 in a pressed state.

Therefore, when the caulking portion 17 is caulked inward in this state, the oil seal 13 is fixed while the reinforcing plate 16 is sandwiched.

As a result, the oil seal 13 is attached to the retainer 12.
Will be reliably and fixed in place.

The contact state between the rising portion 20a of the slinger 20 and the lip portion 18a of the elastic member 18 of the oil seal 13 is adjusted in advance.

In the case of the ones shown in the third and fourth embodiments, the fifth
As shown in the figure, the sealability can be further improved by largely projecting the seal portion 18b provided on the elastic member 18 of the oil seal 13.

In addition, in each of the above-described embodiments, the fixed end surfaces 5c and 15c with which the reinforcing plates 6 and 16 come in contact are provided on the mounting portions 5 and 15 of the oil seals 3 and 13 of the retainers 2 and 12, respectively. As described above, a plurality of protrusions 30 are circumferentially formed by a punch or the like without forming a fixed end face, and the oil is provided between the protrusions 30 and the inwardly bent caulking portions 7 and 17. It may be configured such that the reinforcing plates 6 and 16 of the seals 3 and 13 are fixed, and in this case, the oil seals 3 and 13 are attached to the positions where the retainers 2 and 12 come into contact with the caulked portions 7 and 17, respectively. The elastic members 8 and 18 are formed with the seal portions 8a and 18a.

In addition, the case where the annular caulking portions 7 and 17 are bent inward over the entire circumference and the reinforcing plates 6 and 16 of the oil seals 3 and 13 are caulked has been described, but the caulking portions 7 and 17 are retained to the retainer 2, 12
The oil seals 3 and 13 are attached not at the entire circumference of the mounting portions 5 and 15 but at a plurality of positions as shown in FIG. 7, and the caulking portions 7 and 17 are caulked to attach the oil seals 3 and 13. With this configuration, the caulking portions 7 and 17 can be caulked easily and the caulking can be released easily. Therefore, when the oil seal is deteriorated, replacement work can be easily performed. Is.

Further, as shown in FIGS. 8 and 9, it is possible to crimp only a predetermined portion X of the crimp portions 7 and 17 formed over the circumference so as not to crimp the other portions. is there.

Furthermore, in addition to bending and crimping the caulking portions 7 and 17 inward, as shown in FIGS. 10 and 11, the caulking portions 7 and 17 are
It can also be fixed by forming the protruding portion 30 by protruding the inner surface of the member at a plurality of positions with a punch or the like.

It should be noted that the reinforcing plates 6 and 16 of the oil seals 3 and 13 shown in each of the above embodiments are not flat plates, but the outer peripheral edge is a predetermined distance y from the inner peripheral portion as shown in FIG. If the inclined plate is used, the reinforcing plates 6 and 16 have a spring property, so that the fixing at the time of crimping is further ensured. In particular, the retainer itself has a large coefficient of thermal expansion. When formed, the reinforcing plate itself is displaced, so that displacement of the retainer can be dealt with. Further, FIG. 13 shows a modification of the one shown in FIG. 6 and 16 are positioned, and then, the protrusions 30 are formed by caulking at a plurality of positions in the circumferential direction with a punch or the like, so that the mounting portions 5, 15 and the protrusions 30 are formed.
The reinforcing plates 6 and 16 of the oil seals 3 and 13 may be sandwiched and fixed between and.

Therefore, by constructing as shown in each of the above-described embodiments or a modification thereof, without particularly increasing the strength of the attaching portion of the retainer to the oil seal, that is, the attaching portion of the oil seal. The oil seal can be securely fixed without increasing the thickness of the oil seal.

In addition, the oil seal can be replaced and used, and when the oil seal is attached, the oil seal attachment part of the retainer and the seal part provided on the oil seal ensure a reliable seal. It

[Effect of device]

With this configuration, the retainer is prevented from being deformed or damaged during the assembling of the oil seal, and when assembled, the retainer and the seal portion of the oil seal ensure cooperation. The seal is made.

Also, since it is not fixed by fitting but fixed by caulking, it can be assembled even if the strength of the retainer is not high, so the retainer can be made thin and the overall size and weight can be reduced.
Further, it has an effect that it can be replaced when the oil seal is deteriorated and the replacement work is easy.

[Brief description of drawings]

1 is a schematic view showing a first embodiment of a sealing device according to the present invention, FIG. 2 is a schematic view showing a second embodiment of a sealing device according to the present invention, and FIG. 3 is a schematic view showing a sealing device according to the present invention. FIG. 4 is a schematic view showing a third embodiment, FIG. 4 is a schematic view showing a fourth embodiment of a sealing device according to the present invention, and FIG. 5 is a schematic view showing a modified example of a seal portion of an elastic material of an oil seal, FIG. 6 is a schematic view showing a modified example of the retainer mounting portion, FIG. 7 is a schematic view showing a modified example of the retainer crimping portion, and FIGS. 8 and 9 show a state in which a portion of the crimping portion is crimped. Schematic showing,
10 and 11 are schematic views showing an example of caulking, FIG. 12 is a schematic view showing a modified example of an elastic material of an oil seal, and FIG. 13 is a schematic view showing a modified example of a retainer mounting portion. FIG. 14 is a schematic view showing a conventional sealing device. 1, 11, 21, 31, 41 ...... Sealing device 2, 12, 42 ...... Retainer 3, 13, 43 ...... Oil seal 4, 14, 44 ...... Mating member 5, 15, 45 ...... Mounting part 5a, 15a …… Large diameter part 5b, 15b …… Tapered part 5c, 15c …… Fixed end surface 5d, 15d …… Flat surface 5e, 15e …… Small diameter part 6,16 …… Reinforcement plate 7, 17 …… Crimped part 8, 18 ... Elastic material 9,19,49 ... Rotating shaft 18a ... Lip 18b ... Seal 20 ... Slinger 20a ... Standing 30 ... Projection

Claims (5)

[Scope of utility model registration request] 1. A mating member (4) such as an engine block,
A sealing device (1, 21) for sealing between a mating member (4) and a rotating shaft (9) such as a crankshaft protruding from the internal space of the mating member (4), wherein the sealing device (1, 21) is A retainer (2) attached to a mating member (4) and an oil seal (3) are provided. The oil seal (3) has an inner peripheral surface fitted on the rotating shaft (9) and the retainer (2). (8) having a seal part (8b) that abuts against
And an annular reinforcing plate (6) whose inner peripheral portion is embedded in the elastic material (8), and the reinforcing plate (6) is caulked and fixed to the retainer (2), whereby the oil A sealing device characterized in that a seal (3) and a retainer (2) are integrated. 2. A mating member (14) such as an engine block,
A sealing device (11, 31) for sealing between a mating member (14) and a rotating shaft (19) such as a crankshaft protruding from the internal space of the mating member (14), the sealing device (11, 31) being a mating member. A retainer (12) attached to the member (14) and an oil seal (13) are provided. The oil seal (13) can be fitted onto the rotary shaft (19) and has a disc-like shape at one end. Slinger (20) in which the upright portion (20a) is integrally formed
An elastic material (18) having a lip portion (18a) that abuts the rising portion (20a) of the slinger (20) and a seal portion (18a) that abuts the retainer (12); The reinforcing plate (16) is embedded in the (18), and the reinforcing plate (16) is caulked and fixed to the retainer (12), so that the oil seal (13) and the retainer (12).
A sealing device characterized by being integrated with. 3. A retainer (2, 12) is formed with a hollow part in which an oil seal (3, 13) can be located, and a caulking part (7, 17) is provided on the inner circumference of the hollow part. 3. The sealing device according to claim 1, wherein the oil seals (3, 13) are caulked and fixed by bending the portions (7, 17). 4. A hollow portion in which an oil seal (3, 13) can be located is formed in the retainer (2, 12), and a caulking portion (7, 17) is provided at an inner periphery of the hollow portion with a predetermined interval. 3. The sealing device according to claim 1, wherein the oil seal (3, 13) is caulked and fixed by bending the caulked portion (7, 17). 5. The reinforcing plates (6, 16) are made of elastic material (8, 1).
8. The structure according to claim 1, wherein the structure is inclined with respect to 8).
The sealing device as described in 3 or 4.