JP2001141069A - Sealing device for rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing device capable of preventing mutual attraction when the sealing devices are piled up on a material loading table and pressing them in smoothly and automatically one by one in a process in which the sealing device provided with a magnetization part used to control speed of a vehicle such as an automobile is pressed into a rolling bearing. SOLUTION: In this sealing device 1 provided with a slinger 5 fitted in an end part outside diameter face of an inner ring 2 on a rotation side of a rolling bearing, a core metal unit 8 fitted in an end part inside diameter face of an outer ring 3 of the bearing in opposition to the slinger 5, a seal member 12 mounted on the core metal unit 8, and a magnetization part provided by vulcanization-bonding a rubber magnet 19 on an outer face of a flange 7 of the slinger 5, an annular projection 18 which is formed integrally with a sealing member 12 on an outer face of a flange 11 of the core metal unit 8 and protrudes inward of the bearing is provided, and a clearance is formed between the rubber magnets 19 of the sealing devices 1 piled up on a table and the core metal unit 8 of the sealing device 1 just above them to prevent mutual attraction of the sealing devices owing to this clearance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for a rolling bearing, and more particularly to a sealing device provided with a pulse generating ring for controlling the speed of a vehicle or the like.

[0002]

2. Description of the Related Art A rubber magnet-integrated sealing device in which a multi-polarized annular rubber magnet is integrated with a rolling bearing of an axle as a pulse generating ring used for speed control of a vehicle such as an automobile. Is known.

FIG. 7 shows an example of such a sealing device.
When the sealing device 1 is applied to a rolling bearing of an inner ring rotation type, the sealing device 1 is fitted to an outer diameter surface of an end portion of an inner ring 2 and is fitted to an inner diameter surface of an end portion of an outer ring 3 in opposition thereto. It comprises a cored bar 8 to be attached, a seal member 12 mounted on the cored bar 8 and slidably in contact with the slinger 5, and the rubber magnet 19 vulcanized and bonded to the slinger 5. The slinger 5 has a cylindrical portion 6 and an outer end formed with a flange 7 in the direction of the outer ring 3. A cored bar 8 has a cylindrical portion 9 fitted on the inner diameter surface of the end of the outer ring 3 and an inner end thereof. Flange 11 in the direction of the inner ring 2 on the side of the rolling element 4
Are formed. The distal end portion 10 of the cylindrical portion 9 is slightly bent inward to mount the seal member 12.

[0004] Such a sealing device is manufactured separately from the rolling bearing, and then, as described above, the rolling bearing is mounted such that the slinger is fitted on the inner ring side and the core metal is fitted on the outer ring side. Press-fit. In the press-fitting step, as shown in FIG. 8, a method is employed in which the sealing devices stacked on the material placing table 13 are transported one by one into a chute by a handling device of an automatic press-fitting machine and press-fitted.

[0005]

However, since the sealing device 1 is a rubber magnet integrated type as described above, as shown in FIG. 8, the sealing device 1 is moved so that the metal core 8 is on the lower side. Further, when the slinger 5 to which the rubber magnet 19 is vulcanized and bonded is stacked on the upper side, the rubber magnet 19 attached to the slinger 5 comes into contact with the core metal 8 of the sealing device 1 directly overlying, and the rubber magnet 19 The sealing device 1 directly above is sucked by the suction force of 19. For this reason, it has been difficult to take out the sealing device 1 one by one with the handling device of the automatic press-fitting machine,
There is a problem that automatic press-fitting cannot be performed smoothly.

Therefore, an object of the present invention is to prevent the mutual adsorption when the materials are stacked on a material placing table, and to transport them one by one into a chute without any trouble by a handling device of an automatic press-fitting machine. Another object of the present invention is to provide a sealing device capable of automatically press-fitting a bearing.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention employs the following configuration.

An inner ring-side metal member fitted to the end outer diameter surface of the inner ring; an outer ring-side metal member fitted to the end inner diameter surface of the outer ring facing the inner ring side metal member; A sealing member mounted on a fixed metal member of the metal member or the outer ring side metal member and slidably contacting the rotating metal member; and a magnetized portion provided on an outer surface of the rotating metal member. In the sealing device for a rolling bearing formed by magnetizing the magnetized portion in the circumferential direction with multiple poles, the fixed-side metal member or the sealing member attached to the fixed-side metal member is provided inside the rolling bearing. The protruding projections were formed continuously or discontinuously in the circumferential direction.

[0009] The projection may be provided integrally with the seal member.

According to the above construction, in the step of press-fitting the sealing device into the rolling bearing, the projection is formed between the outer surfaces of the metal member fitted to the fixed side between the sealing devices stacked on the material placing table. Since the air gap is formed only at the height of the protrusion, the suction force to the sealing device that is superimposed immediately above the magnetized portion is weakened. As a result, each of the above-mentioned sealing devices does not stick to each other, so that each sheet is conveyed into the chute without trouble by the handling device of the automatic press-fitting machine,
The automatic press-fitting of the sealing device into the bearing is performed smoothly.

On the other hand, as another method for preventing the above-mentioned overlapping sealing devices from being attracted, a configuration in which the metal member on the fixed side is formed of a non-magnetic material can be adopted.

With the above structure, the attraction force of the magnetized portion does not act on the metal member formed of a non-magnetic material fitted on the fixed side of the sealing device which overlaps directly above. as a result,
The overlapping sealing devices do not adsorb each other, and thus have the same effect as described above.

As the non-magnetic material, austenitic stainless steel is desirable because it has corrosion resistance and can prevent rusting. Among them, SUS 304 which satisfies required strength and is mass-produced is suitable.

The magnetized portion may be formed by fixing a magnet to the metal member, or may be formed by magnetizing the metal member directly. When the magnet is fixed, a magnetic rubber powder is mixed with rubber and vulcanized and formed, and an N-pole and an S-pole are alternately formed in the circumferential direction, and a multi-pole magnetized annular rubber magnet is used. desirable.

It is preferable that the rotating metal member provided with the magnetized portion is made of a magnetic material.

In this case, the strength of the magnetic field of the magnet is increased, and the speed can be easily detected during the speed control.

As the magnetic material, a ferritic stainless steel having corrosion resistance and capable of preventing rusting, and particularly from the viewpoint of strength, is desirable. Among them, SUS430 excellent in workability and mass-produced is appropriate.

Further, a magnetized portion can be formed by directly magnetizing the metal member on the rotating side. In this case, the magnet can be omitted, and the device can be made compact.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

The sealing device 1 according to the first embodiment shown in FIG.
Is a case where the present invention is applied to a rolling bearing of a type in which the inner ring 2 rotates, and includes a slinger 5 which is an inner ring side metal member fitted to an outer diameter surface of an end portion of the inner ring 2 and an end of the outer ring 3 of the bearing. A metal core 8 that is an outer ring-side metal member fitted to the inner diameter surface of the outer ring, a seal member 12 that slides on the metal core 8 with the slinger 5,
A rubber magnet 19 as a magnetized portion is concentrically vulcanized and bonded to the outer surface of the slinger 5.

The slinger 5 has a cylindrical portion 6 and a flange 7 formed at its outer end in the direction of the outer ring 3.
A cylindrical portion 9 fitted to the inner diameter surface of the end of the outer ring 3 and a flange 11 in the direction of the inner ring 2 are formed on the inner end portion, that is, on the side of the rolling element 4. In order to attach the sealing member 12, the core 8
The distal end portion 10 of the cylindrical portion 9 is slightly bent inward.

The sealing member 12 is formed by the cylindrical portion 6 of the slinger 5.
The radial lips 14 and 15 slidably contacting the outer surface of the slinger 5 and the axial lip 16 slidably contacting the inner surface of the slinger 5. Are formed integrally at the tip of The seal member 12 is mounted on the distal end portion 10 of the cylindrical portion 9 of the metal core 8 and the flange 11, and the projection 18 is located on the outer surface of the flange 11, and as shown schematically in FIG. It is formed in a ring shape continuously in the circumferential direction, protruding inward of the bearing, that is, toward the rolling element 4.

The projection 18 is formed in an annular shape continuously and integrally with the seal member 12, but instead of the projection 18,
As schematically shown in FIG. 6B, a protrusion 18 'discontinuous in the circumferential direction may be formed, and the protrusion 18' may be formed at least at three places.

The rubber magnet 19 concentrically vulcanized and bonded to the outer surface of the flange 7 of the slinger 5 is made of Ba (barium).
A magnetic powder such as ferrite is mixed with rubber and vulcanized and formed, and N and S poles are alternately formed in the circumferential direction and magnetized in multiple poles.

In order to increase the strength of the magnetic field of the rubber magnet 19 and facilitate speed detection during speed control, the slinger 5 which is a metal member fitted on the rotating side is made of a magnetic material. It is desirable to configure with. As the magnetic material, ferritic stainless steel is excellent in workability because it has corrosion resistance and can prevent rusting,
SUS430 mass-produced is suitable.

As shown in FIG. 5, in the sealing device 1, in the step of press-fitting the bearing, the core bar 8 is placed on the lower side of the material placing table 13, and the slinger 5 to which the rubber magnet 19 is vulcanized and bonded is placed on the upper side. Stacked up to become. In this case, a sealing member 12 is provided on the outer surface of the flange 11 of the cored bar 8 of the sealing device 1.
The protrusions 18 formed integrally with the rubber magnets 19 are continuously provided in an annular shape.
Then, the core metal 8 of the sealing device 1 immediately above and the tip of the projection 18 are not in contact with each other. Thus, a gap S is formed at a height corresponding to the height of the protrusion 18 protruding from the outer surface of the slinger 5.

The presence of this gap weakens the attractive force of the rubber magnet 19 to the cored bar 8, so that the material placing table 1
The sealing devices 1 stacked on each other 3 are no longer attracted to each other, and the sealing devices 1 are conveyed one by one into the chute without any trouble by the handling device of the automatic press-fitting machine, and the automatic press-fitting to the bearings is performed smoothly. .

A sealing device 1 according to a second embodiment shown in FIG.
Is a case where the present invention is applied to a bearing of a type in which the outer ring 3 rotates, and is fitted to a slinger 5 which is an outer ring side metal member fitted to the inner diameter surface of the end of the outer ring 3 and to an outer diameter surface of the end of the inner ring 2. A cored bar 8 as an inner metal member attached to the inner ring, a seal member 12 attached to the cored bar 8 and slidably contacting the slinger 5, and vulcanized and bonded coaxially to an outer surface of the flange 7 of the slinger 5. And a rubber magnet 19 as a magnetized part. The projection 18 having a mountain-shaped cross-section is formed integrally with the seal member 12 as described above, is located on the outer surface of the flange 11, and is continuously annular in the circumferential direction (see FIG. 6A). , Protruding inward of the bearing, that is, toward the rolling element 4. Instead of the projections 18, the same as in the first embodiment (FIG. 6)
(See (b)), a protrusion 18 ′ that is discontinuous in the circumferential direction may be formed, and the protrusion 18 ′ may be formed at least at three places.

Also in this embodiment, in the same manner as shown in FIG. 5, in the sealing device 1 stacked on the material placing table 13, the core 8 is vulcanized and the rubber magnet 19 is bonded to the lower side. The slinger 5 is located on the upper side, and a space S is formed between the sealing devices only at the height at which the projection 18 protrudes from the outer surface of the slinger 5. Due to the presence of this gap, the sealing device 1 does not adsorb to each other, as in the case described above, and the automatic press-fitting of the sealing device 1 into the bearing is performed smoothly.

A sealing device 1 according to a third embodiment shown in FIG.
1 shows a case where the present invention is applied to a rolling bearing of a type in which an inner ring rotates as in FIG. 1, and a slinger 5 fitted to an outer diameter surface at an end of an inner ring 2 and an inner diameter surface at an end portion of an outer ring 3. Cored bar 8
And a sealing member 12 mounted on the cored bar 8 and slidingly contacting the slinger 5. The magnetized portion 2 is formed by directly magnetizing the flange 7 of the slinger 5 made of a magnetic material in the circumferential direction with multiple poles.
0 is provided. The projection 18 is formed integrally with the seal member 12 as described above, is located on the outer surface of the flange 11, and is annularly continuous in the circumferential direction thereof (FIG. 6A).
), Protruding inward of the bearing, that is, toward the rolling element 4.

A sealing device 1 according to a fourth embodiment shown in FIG.
2 shows a case where the present invention is applied to a bearing of a type in which the outer ring rotates, as in FIG. 2, and the slinger 5 fitted to the inner diameter surface of the end of the outer ring and the outer diameter surface of the end of the inner ring 2 are fitted. A core member 8 and a seal member 12 mounted on the core member 8 and slidingly contacting the slinger 5.
The magnetized portion 20 is provided on the flange 7 of the slinger 5 made of a magnetic material. The projection 18 is provided on the sealing member 12 as described above.
And is formed on the outer surface of the flange 11 and is continuously annular in the circumferential direction thereof (see FIG. 6A).
It is formed so as to protrude inward of the bearing, that is, toward the rolling element 4.

In the third and fourth embodiments described above as well, a gap S substantially corresponding to the height of the projection 18 is formed in the state of being stacked on the material placing table 13, so that the same as in the above-described case. The sealing devices 1 do not adsorb to each other. Therefore, as in the first embodiment, the automatic press-fitting of the sealing device 1 into the bearing is performed smoothly.

Instead of forming the projections 18 and 18 ', the metal core 8 which is a metal member fitted to the fixed side can be formed of a non-magnetic material. As this non-magnetic material, austenitic stainless steel is desirable because it has corrosion resistance and can prevent rusting. Among them, SUS30 which has a required strength and is mass-produced is preferable.
4 is appropriate.

With this configuration, when the sealing device 1 is stacked on the material placing table 13, the magnetized portion, that is, the magnetized portion 2 directly magnetized on the rubber magnet 19 or the slinger 5.
Even if it comes into contact with the core bar 8 made of the non-magnetic material of the sealing device 1 that overlaps directly above the zero, the attractive force of the magnetized portion does not act on the core bar 8. Accordingly, the sealing devices 1 are conveyed one by one into the chute without any trouble by the handling device of the automatic press-fitting machine without being attracted to each other, and the automatic press-fitting to the bearings is performed smoothly.

[0035]

As described above, according to the present invention, an inner ring of a bearing is provided in a sealing device provided with a magnetized portion such as a rubber magnet having a function of a pulse generating ring used for speed control of a vehicle such as an automobile. Alternatively, the metal member fitted to one of the fixed sides of the outer ring or the seal member attached thereto is formed with projections continuously or discontinuously in the circumferential direction, thereby being stacked on the material placing table. A gap substantially corresponding to the height of the projection is formed between the sealing devices, and the suction force to the sealing device that is superimposed immediately above the magnetized portion is weakened. A similar effect can be obtained by forming the metal member fitted on the fixed side with a non-magnetic material.

As a result, even when the sealing device is stacked on the material placing table, it does not adsorb to each other,
Each sheet is transported by the handling device of the automatic press-fitting machine,
Automatic press-fitting into a smooth bearing becomes possible, and automation of the manufacturing process and labor saving are achieved.

[Brief description of the drawings]

FIG. 1 is a partially omitted cross-sectional view of a first embodiment.

FIG. 2 is a partially omitted cross-sectional view of the second embodiment.

FIG. 3 is a partially omitted cross-sectional view of the third embodiment.

FIG. 4 is a partially omitted cross-sectional view of the fourth embodiment.

FIG. 5 is a sectional view of the sealing device according to the first embodiment in a stacked state;

FIG. 6A is a plan view schematically showing an example of a projection. FIG. 6B is a plan view schematically showing another example of a projection.

FIG. 7 is a partially omitted cross-sectional view of the prior art.

FIG. 8 is a side view of a conventional sealing device in a stacked state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sealing device 2 Inner ring 3 Outer ring 4 Rolling element 5 Slinger 6 Cylindrical part 7 Flange 8 Core metal 9 Cylindrical part 10 Tip part 11 Flange 12 Seal member 13 Material placing table 14 Radial lip 15 Radial lip 16 Axial lip 17 Bend 18 18 'projection 19 rubber magnet 20 magnetized part

Claims (7)

[Claims] An inner ring side metal member fitted to an end outer diameter surface of an inner ring; an outer ring side metal member fitted to an end inner diameter surface of the outer ring so as to face the inner ring side metal member; A sealing member mounted on a fixed metal member, either the inner ring metal member or the outer ring metal member, and slidably contacting the rotating metal member; and a magnetized portion provided on an outer surface of the rotating metal member. In the rolling bearing sealing device formed by magnetizing the magnetized portion in multiple directions in the circumferential direction, in the rolling bearing sealing member, the fixed-side metal member or the seal member attached to the fixed-side metal member. A sealing device for a rolling bearing, wherein a projection protruding in the direction is formed continuously or discontinuously in a circumferential direction. 2. The rolling bearing sealing device according to claim 1, wherein said projection is provided integrally with said seal member. 3. An inner ring side metal member fitted to an end outer diameter surface of an inner ring, an outer ring side metal member fitted to an end inner diameter surface of the outer ring so as to face the inner ring side metal member, A sealing member mounted on a fixed metal member, either the inner ring metal member or the outer ring metal member, and slidably contacting the rotating metal member; and a magnetized portion provided on an outer surface of the rotating metal member. Wherein the fixed-side metal member is formed of a non-magnetic material in the sealing device for a rolling bearing formed by magnetizing the magnetized portion in multiple directions in the circumferential direction. . 4. The rolling bearing sealing device according to claim 3, wherein the nonmagnetic material is austenitic stainless steel. 5. The magnetized portion, wherein the rotating-side metal member is formed of a magnetic material, and a rubber in which a magnetic powder is mixed with the magnetic material is vulcanized and bonded to form the magnetized portion. Item 5. The rolling bearing sealing device according to any one of Items 1 to 4. 6. The rolling bearing sealing device according to claim 5, wherein the magnetic material is ferritic stainless steel. 7. The magnetized portion formed by directly magnetizing the metal member on the rotation side.
The sealing device for a rolling bearing according to any one of the above.