JPH071334U - Bearing sealing device - Google Patents

Abstract

(57) [Abstract] [Purpose] A structure in which two seal members, an inner seal member and an outer seal member, can be mounted on the outer side of a rolling element of a bearing between an inner ring and an outer ring in a single assembly operation. It is to provide a sealing device. The core metal 23 of the inner seal member 21 is provided with an outwardly bent portion 36, and a fitting portion 37 that matches the inner diameter surface of the bent portion 36 of the inner seal member 21 at the root of the lip 29 of the outer seal member 22. In the state before being mounted on the bearing, the fitting portion 37 is fitted to the inner diameter surface of the bent portion 36 to integrally assemble the inner seal member 21 and the outer seal member 22. The inner seal member 21 and the outer seal member 22 are formed by press-fitting both the seal members 21 and 22 between the inner ring 33 and the outer ring 31 by the press-fitting jig 38.
And were fitted in the predetermined seal grooves 32 and 34, respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bearing sealing device, and more particularly to a sealing device in which two sealing members, an inner sealing member and an outer sealing member, are mounted between an inner ring and an outer ring on one side of a rolling element.

[0002]

[Prior art]

 Bearings such as propeller shafts of automobiles are exposed to dust and rainwater, so the sealing device is two inner seal members and two outer seal members between the inner ring and the outer ring on one side of the rolling element, and the rolling element. A total of 4 sealing members are installed on both sides of.

FIG. 9 shows an example of a conventional sealing device, in which an inner seal member 1 and an outer seal member 2 are composed of cored bars 3 and 4 and seal rubbers 5 and 6 integrated with the cored bars, respectively. 1, the fitting portion 7 formed on the outer peripheral edge of the seal rubber 5 is fitted into the seal groove 9 on the inner peripheral surface of the outer ring 8, and the lip 10 formed on the inner peripheral edge of the seal rubber 5 is connected to the outer peripheral surface of the inner ring 11. The surface is sealed by pressing. In the outer seal member 2, the mounting portion 12 formed on the inner peripheral edge of the seal rubber 6 is fitted into the seal groove 13 on the outer peripheral surface of the inner ring 11, and the lip 14 formed on the inner peripheral edge of the seal rubber 6 is attached to the outer ring 8. It presses against the inner diameter surface of and seals the surface.

When the inner seal member 1 and the outer seal member 2 are assembled, they are mounted one by one in order from the inside.

[0005]

[Problems to be solved by the device]

 However, mounting the inner seal member 1 and the outer seal member 2 one by one as described above requires a large number of assembling steps and complicates the assembling equipment, resulting in a high cost of the product.

In view of the above, the present invention aims to solve the above-mentioned problems by combining two seal members, one inside and one outside, in advance so that the two seal members can be mounted at once. To do.

[0007]

[Means for Solving the Problems]

 A first means for achieving the above object is to mount an inner seal member and an outer seal member between an inner ring and an outer ring with rolling elements interposed therebetween, and attach each of the seal members to a core metal and a seal rubber integrated with the core metal. One of the seal members is attached to the inner diameter surface of the outer ring to seal the outer diameter surface of the inner ring, and the other seal member is attached to the outer diameter surface of the inner ring to seal the inner diameter surface of the outer ring. In the bearing sealing device, the core metal of the inner seal member is provided with an outward bent portion, and a fitting portion that matches the bent portion of the inner seal member is provided at the root of the lip of the seal rubber of the outer seal member. The bending height of the bending portion of the inner seal member is set to a height at which the fitting portion and the root portion of the lip fit.

A second means is that an inner seal member and an outer seal member are mounted between an inner ring and an outer ring with rolling elements interposed therebetween, and each of the seal members is composed of a core metal and a seal rubber integrated with the core metal. However, in a bearing sealing device in which either one of the seal members is mounted on the inner diameter surface of the outer ring and the other seal member is mounted on the outer diameter surface of the inner ring, the core seal of the inner seal member faces outward. The bent portion is provided, the outer diameter surface of the bent portion is fitted into the inner diameter surface of the outer ring or the outer diameter surface of the inner ring, and the lip of the inner seal member is pressed against the facing surface of the other race, and the outer seal member is attached. The lip is pressed against the bent portion.

A third means is that an inner seal member and an outer seal member are mounted between an inner ring and an outer ring with rolling elements interposed therebetween, the inner seal member is made of a metal ring, and the outer seal member is a core. In the sealing device for the bearing, which is composed of gold and a seal rubber integrated with the same, one of the seal members is mounted on the inner diameter surface of the outer ring, and the other seal member is mounted on the outer diameter surface of the inner ring. The metal ring of the seal member is provided with an outwardly bent portion, and the outer diameter surface of the bent portion is fitted into the outer ring inner diameter surface or the inner ring outer diameter surface and mounted, and the inner seal member inner diameter surface and the other raceway are provided. A gap is provided between the inner seal member and a plurality of lips of the outer seal member to press the inner seal member.

[0010]

[Action]

 In the bearing sealing device according to the first means, the fitting portion of the outer sealing member and the root portion of the lip are fitted inside the bent portion of the core metal of the inner sealing member before being mounted on the bearing. , Both sealing members are in a combined state. When this is press-fitted between the inner ring and the outer ring of the bearing using an appropriate press-fitting jig, the inner seal member is separated from the outer seal member, and either the inner ring or the outer ring is the race ring, and it becomes a rolling element. It is attached to the one that has the attachment part on the near side (that is, inside), and the lip of the sealing rubber is pressed against the sealing surface of the other bearing ring to achieve sealing. The outer seal member is mounted on a bearing ring having a mounting portion on the side remote from the rolling element (that is, on the outer side), and the lip of the seal rubber is pressed against the sealing surface of the other bearing ring to achieve sealing.

Also, in the bearing sealing device according to the second means, the outer seal member lip is contracted inside the bent portion of the core metal of the inner seal member before being mounted on the bearing. And both sealing members are combined together. When this is press-fitted between the inner ring and the outer ring of the bearing using an appropriate press-fitting jig, the inner seal member is the inner ring or outer ring, which is closer to the rolling element (that is, the inner side). It is mounted on a body having a mounting part, and seals between the mounting part and the outer surface of the core metal, and the lip of the sealing rubber is pressed against the sealing surface of the other bearing ring to achieve sealing. The outer seal member is mounted on a bearing ring that has a mounting portion on the side farther from the rolling element (that is, on the outer side), and the lip of the seal rubber is pressed against the core metal of the inner seal member to achieve sealing.

Also in the bearing sealing device according to the third means, the outer seal member is fitted inside the bent portion of the metal ring forming the inner seal member before being mounted on the bearing, Be combined with. The action of mounting this with a press-fitting jig is the same as in the case described above. However, in this case, there is a gap between the inner diameter surface of the inner seal member and the mating bearing ring, and there is no sealing action, but multiple lips are provided on the outer seal member, and each lip is attached to the inner seal member. A seal is achieved by being pressed.

[0013]

【Example】

 The first embodiment shown in FIGS. 1 to 5 is an embodiment of the bearing sealing device according to the above-mentioned first means. This sealing device comprises a combination of an inner seal member 21 and an outer seal member 22. These seal members 21 and 22 are composed of cored bars 23 and 24, respectively, and seal rubbers 25 and 26 integrated around them. The inner seal member 21 has a mounting portion 27 formed on the outer peripheral edge of the seal rubber 25, and a lip 28 formed on the inner peripheral edge. The outer seal member 22 has a lip 29 formed on the outer peripheral edge of the seal rubber 26 and a mounting portion 30 formed on the inner peripheral edge thereof.

The mounting portion 27 of the inner seal member 21 is fitted in the inner seal groove 32 provided on the inner diameter surface of the outer ring 31 of the bearing, and the lip 28 thereof is pressed against the outer diameter surface of the inner ring 33. , Seal the surface.

The mounting portion 30 of the outer seal member 22 is provided with an outer seal groove 34 provided on the outer diameter surface of the inner ring 33 (the outer seal groove 34 is located outside the inner seal groove 32 of the outer ring 31, That is, it is fitted on the side farther from the rolling element 35). Further, the lip 29 is pressed against the inner diameter surface of the outer ring 31 to seal the surface.

The core metal 23 of the inner seal member 21 has an outwardly bent portion 36 on the outer peripheral portion. Further, a fitting portion 37 having an outer diameter matching the inner diameter surface of the bent portion 36 is formed on the outer peripheral edge of the seal rubber 26 of the outer sealing member 22, and the lip 29 is formed at the outer corner of the fitting portion 37. The root part of is integrated.

The bending height of the bending portion 36 is formed so as to fit over the fitting portion 37 and reach the base portion of the lip 29 (see FIG. 2).

Before the inner seal member 21 and the outer seal member 22 are mounted on the bearing, the inner seal member 21 and the outer seal member 22 are disposed inside the bent portion 36 of the core metal 23 of the inner seal 21 as shown in FIG. The fitting portion 37 and the root portion of the lip 29 are pushed in to be combined together. At this time, since the root portion of the lip 29 is pressed by the bending portion 36, the lip 29 is elastically deformed in the diameter reducing direction and bent inward as shown in the drawing.

To mount the above-mentioned assembly of both seal members 21, 22 between the inner ring 33 and the outer ring 31 of the bearing, a press-fitting jig 38 as shown in FIG. 2 is used. The press-fitting jig 38 has an outer peripheral pressing portion 39 that presses the outer end surface of the inner seal member 21 and an inner peripheral pressing portion 41 that presses the central portion of the outer seal member 22. The projecting height of the inner peripheral pressing portion 41 is set to be lower than the projecting height of the outer peripheral pressing portion 39, and when the outer peripheral pressing portion 39 is in contact with the outer end surface of the inner seal member 21, the inner peripheral pressing portion 41 has the outer seal portion. The inner seal member 21 does not hit the member 22, but hits the outer end surface of the outer seal member 22 when the inner seal member 21 is pushed in more than a certain amount (see the constant chain line in FIG. 3).

To mount the assembly of the inner seal member 21 and the outer seal member 22 between the inner ring 33 and the outer ring 31 by using the press-fitting jig 38 as described above, first press-fit as shown in FIG. The outer peripheral pressing portion 39 of the tool 38 is brought into contact with the outer end surface of the inner seal member 21 and pressed.

Then, as shown in FIG. 3, the mounting portion 27 of the inner seal member 21 is elastically deformed and pushed into the inner diameter surface of the outer ring 31, and at the same time, the outer seal member 22 is also integrally moved and mounted. The portion 30 contacts the outer end surface of the outer diameter portion of the inner ring 33.

When the press-fitting jig 38 further advances, the inner seal member 21 moves inward away from the outer seal member 22, and the inner peripheral pressing portion 41 contacts the central portion of the outer seal member 22 (one point in FIG. 3). See the chain line).

When the press-fitting jig 38 further advances, as shown in FIG. 4, the mounting portion 30 of the outer seal member 22 elastically deforms and is pushed into the inner diameter surface of the inner ring 33. The mounting portion 30 of the outer seal member 22 is fitted in the outer seal groove 34 of the inner ring 33, and at the same time, the mounting portion 27 of the inner seal member 21 is fitted in the inner seal groove 32 of the outer ring 31. At this time, the lip 28 of the inner seal member 21 is pressed against the inner diameter surface of the inner ring 33 to achieve sealing.

Next, when the press-fitting jig 38 is retracted, as shown in FIG. 1, the lip 29 of the outer seal member 22 is pressed against the inner diameter surface of the outer ring 31 to achieve sealing.

As shown in FIG. 5, the outer end surface of the inner seal member 21 and the inner end surface of the outer seal member 22 are provided with claws 42 and 43 that engage with the seal rubbers 25 and 26, respectively. The combination of both seal members 21 and 22 may be ensured.

Next, the second embodiment shown in FIGS. 6 to 11 is an embodiment of the above-mentioned second means. In this case, the inner seal member 45 is formed by integrating a cored bar 46 having an inverted L-shaped cross section and a seal rubber 47 on the inner peripheral edge, and the bent portion 48 of the cored bar 46 has a width exceeding the outer end surface of the outer seal member 49. Have. A lip 51 is formed on the inner peripheral edge of the seal rubber 47.

The outer seal member 49 is formed by integrating a core rubber 52 and a seal rubber 53. A lip 54 is formed on the outer peripheral edge of the seal rubber 53, and a mounting portion 55 is formed on the inner peripheral edge.

Before mounting on the bearing, as shown in FIG. 6, the lip 51 of the inner seal member 45 rests on the bent portion 56 of the outer seal member 49, and the lip 51 of the outer seal member 49 is inside. It is pressed against the inner diameter surface of the bent portion 48 of the seal member 45.

The above-mentioned assembly of the inner seal member 45 and the outer seal member 49 is press-fitted between the inner ring 33 and the outer ring 31 by a suitable press-fitting jig 57 (see FIG. 7). In this case, the inner seal member 45 advances relative to the outer seal member 49 and is fitted into the predetermined inner seal groove 58 and outer seal groove 59, respectively. At this time, the core metal 46 of the inner seal member 45 is in close contact with the inner diameter surface of the outer ring 31 for sealing, and the lip 51 is pressed against the outer diameter surface of the inner ring 33 for sealing.

Further, a seal is achieved between the lip 54 of the outer seal member 49 and the inner diameter surface of the bent portion 48 of the cored bar 46 of the inner seal member 45. As shown in FIG. 7, the lip 54 of the outer seal member 49 is pressed against the bent portion 48 of the inner seal member 45 to seal the two seal members 45 and 49 with the both seal members 45 and 49 attached. .

As shown in FIG. 8, a trapezoidal protrusion 61 is provided on the outer end surface of the seal rubber 47 of the inner seal member 45, and a recess 62 that partially fits the protrusion 61 is provided on the outer seal member. By providing the seal member 49, it is possible to more surely integrate both the seal members 45, 49 at the stage before mounting on the bearing.

Further, in order to further enhance the sealing effect, as shown in FIG. 9, a side lip 63 is provided on the inner surface of the seal rubber 53 of the outer seal member 49, and this is pressed against the core bar 46 of the inner seal member 45. You may

As shown in FIG. 10, a side lip 64 is provided on the seal rubber 47 of the inner seal member 45, and the side lip 64 is pressed against the core metal 56 of the outer seal member.

The one shown in FIG. 11 is one in which a radial lip 65 protruding in the radial direction is provided on the inner surface of the seal rubber 53 of the outer seal member 49, and this is pressed against the bending portion 48 of the inner seal member 45. is there.

Next, a third embodiment shown in FIGS. 12 to 14 is an embodiment of the above-mentioned third means. In this case, the inner seal member 45 is composed only of a metal ring having a bent portion 48 having an inverted L-shaped cross section, and a gap G is provided between the inner diameter surface and the outer diameter surface of the inner ring 33.

The outer seal member 49 is composed of a cored bar 52 and a seal rubber 53, as in the second embodiment described above. In addition to the constitution, the seal rubber 53 is provided with three side lips 63, and each side lip 63 is provided. The lip 63 is pressed against the inner seal member 45. In addition, the one shown in FIG. 13 is provided with two side lips 63 having different bending directions. The one shown in FIG. 14 is provided with two side lips 63 and one radial lip 65.

In the state before attachment, the components shown in FIGS. 12 to 14 are pushed into the inner surface of the inner seal member 45 to be integrated in the same manner as in the above-described respective embodiments, but the attachment is not performed. At this time, a press-fitting jig is used to push it in between the inner ring 33 and the outer ring 31 for mounting.

In any of the above-described embodiments, the inner seal members 21 and 45 may be attached to the inner ring 33, and the outer seal members 22 and 49 may be attached to the outer ring 31.

[0039]

[Effect of device]

 As described above, according to the present invention, the inner seal member and the outer seal member are combined together before they are mounted on the bearings, and they are separated into the inside and the outside at the time of press-fitting, or spread by a predetermined interval, respectively. It is attached to the outer ring. Therefore, according to this invention, the two sealing members can be mounted on the bearing at once by one assembly work, so that the work efficiency is improved and the product cost can be reduced.

[Submission date] October 7, 1993

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

FIG. 15 shows an example of a conventional sealing device. The inner seal member 1 and the outer seal member 2 are composed of cored bars 3 and 4 and seal rubbers 5 and 6 integrated with the cored bars, respectively. Inserts the mounting portion 7 formed on the outer peripheral edge of the seal rubber 5 into the seal groove 9 on the inner peripheral surface of the outer ring 8 and presses the lip 10 formed on the inner peripheral edge of the seal rubber 5 against the outer peripheral surface of the inner ring 11. , That surface is to be sealed. In the outer seal member 2, the mounting portion 12 formed on the inner peripheral edge of the seal rubber 6 is fitted into the seal groove 13 on the outer peripheral surface of the inner ring 11, and the lip 14 formed on the inner peripheral edge of the seal rubber 6 is attached to the outer ring 8. It presses against the inner diameter surface of and seals the surface.

[Brief description of drawings]

FIG. 1 is a sectional view showing a part of a first embodiment.

FIG. 2 is a cross-sectional view showing the procedure of the above mounting work.

FIG. 3 is a cross-sectional view showing the procedure of the above-described mounting work.

FIG. 4 is a cross-sectional view showing the procedure of the above-described mounting work.

FIG. 5 is a sectional view showing a part of a modification of the above.

FIG. 6 is a sectional view showing a part of the second embodiment.

FIG. 7 is a sectional view of the same as above during mounting work.

FIG. 8 is a sectional view showing a part of a modification of the above.

FIG. 9 is a sectional view showing a part of a modification of the above.

FIG. 10 is a sectional view showing a part of a modification example of the above.

FIG. 11 is a sectional view showing a part of a modification of the above.

FIG. 12 is a sectional view showing a part of the third embodiment.

FIG. 13 is a sectional view showing a part of a modification of the above.

FIG. 14 is a sectional view showing a part of a modification of the above.

FIG. 15 is a sectional view showing a part of a conventional example.

[Explanation of symbols]

 21 inner seal member 22 outer seal member 23 core metal 24 core metal 25 seal rubber 26 seal rubber 27 mounting portion 28 lip 29 lip 30 mounting portion 31 outer ring 32 inner sealing groove 33 inner ring 34 outer sealing groove 35 rolling element 36 bending portion 37 fitting portion 38 Press-fitting jig 39 Outer peripheral pressing portion 41 Inner peripheral pressing portion 42 Claw 43 Claw 45 Inner sealing member 46 Core metal 47 Seal rubber 48 Bending portion 49 Outer sealing member 51 Lip 52 Core metal 53 Seal rubber 54 Lip 55 Mounting portion 56 Bending portion 57 Press fitting Jig 58 Inner seal groove 59 Outer seal groove 61 Projection 62 Recess 63 Side lip 64 Side lip 65 Radial lip

Claims (3)

[Scope of utility model registration request] 1. An inner seal member and an outer seal member are mounted between an inner ring and an outer ring with rolling elements interposed therebetween, and each of the seal members is composed of a core metal and a seal rubber integral with the core metal.
A bearing sealing device, wherein one of the seal members is attached to the outer ring inner diameter surface to seal the inner ring outer diameter surface, and the other seal member is attached to the inner ring outer diameter surface to seal the outer ring inner diameter surface. , An outward bending portion is provided on the core metal of the inner sealing member, and a fitting portion matching the bending portion of the inner sealing member is provided at the root of the lip of the seal rubber of the outer sealing member. A sealing device for a bearing, wherein a bending height of the bending portion is set to a height at which the fitting portion and the base portion of the lip fit. 2. An inner seal member and an outer seal member are mounted between an inner ring and an outer ring with rolling elements interposed therebetween, and each of the seal members is composed of a core metal and a seal rubber integrated with the core metal,
In a bearing sealing device in which one of the seal members is mounted on the inner diameter surface of the outer ring and the other seal member is mounted on the outer diameter surface of the inner ring, a core metal of the inner seal member is provided with an outwardly bent portion. , The outer diameter surface of the bent portion is fitted into the outer ring inner diameter surface or the inner ring outer diameter surface and mounted, and the lip of the inner seal member is pressed against the facing surface of the other race, and the lip of the outer seal member is A bearing sealing device characterized by being pressed against a bent portion. 3. An inner seal member and an outer seal member are mounted between an inner ring and an outer ring with rolling elements interposed therebetween, the inner seal member is made of a metal ring, and the outer seal member is a cored bar and an integral body thereof. A sealing device for a bearing constituted by a seal rubber, wherein one of the seal members is mounted on the inner surface of the outer ring and the other seal member is mounted on the outer surface of the inner ring. Provided with a bent portion in the direction, the outer diameter surface of the bent portion is fitted into the outer ring inner diameter surface or the inner ring outer diameter surface and mounted, and a gap is provided between the inner seal member inner diameter surface and the other race ring, A bearing sealing device, wherein a plurality of lips of the outer seal member are pressed against the inner seal member.