JP2009103172A - Roller bearing sealing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily remove a sealing member without damaging a bearing without increasing the number of parts of the sealing member. <P>SOLUTION: This device is applied to a support device of a cast slab guide roll 11 of a continuous casting facility. An end of the cast slab guide roll 11 is inserted into a housing 12, and the cast slab guide roll 11 is supported rotatably to the housing 12 by spherical roller bearings 17 provided inside the housing 12. The sealing member 30 is mounted on the end at roll shoulder side of the outer ring 16 of the spherical roller bearing 17, and a projection 36 is formed on the outside surface of the sealing member 30. Thus, this projection 36 can be easily pulled toward outside in the axial direction by pinching it with a removing tool so that the sealing member 30 can easily be removed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sealed rolling bearing and a sealing device in which a bearing space between an inner ring and an outer ring is sealed with a seal member.

  In continuous casting equipment that casts molten steel after scouring into slabs, blooms, billets, etc. by continuous casting, rolls such as pinch rolls and slab guide rolls are rotatably supported by the housing with double row roller bearings. The This roll support device is operated at a high temperature and in a poor environment where there are many foreign substances such as cooling water, water vapor, scales, etc., so pay particular attention to ensuring the lubricity and sealing performance of the bearing itself, that is, the rolling bearing. It is required to have a structured.

  For this reason, in the roll support device, for example, an open type self-aligning roller bearing that is open at both ends is accommodated in the housing, grease is continuously supplied from the housing side, and the bearing is provided between the roll and the housing. By sealing with a seal mechanism (oil seal or the like) on both sides of the bearing, it is often the case that a good sealability of the bearing portion is ensured and water and foreign matter are prevented from entering the bearing. At this time, urea grease is generally used as the continuously supplied grease.

  Further, in order to enhance the sealing performance of the seal, in the roll support device, oil-air lubrication is performed from one end side of the self-aligning bearing, and a seal member is provided at the other end of the bearing, and the seal member A seal member having seal lips is provided at both ends of the rolling bearing, and the seal lip is in sliding contact with the peripheral surface of the bearing ring. There exists what reduces a contact pressure (refer patent document 2). In addition, a self-aligning bearing in which a seal member is fixed by a retaining ring has been proposed (see Non-Patent Document 1).

  In addition, as with the roll support device, rolling bearings applied to railway vehicle main motors used in poor environments where dust, water, etc. are scattered are deteriorated due to contamination of dust and water into the bearings. In order to prevent this, a sealed type rolling bearing is applied.

  In this sealed rolling bearing, both sides of the bearing space between the inner ring and the outer ring are sealed with seal members, and the bearing space is filled with grease. However, when applied to a railway car main motor, there is a problem that if the bearing space is small, a sufficient amount of grease cannot be secured to ensure the bearing life.

  In order to solve this problem, a sealed type rolling bearing is proposed in which seal members made of resin material are provided on both sides of the bearing space so as to protrude from both end faces of the inner ring and outer ring with a U-shaped cross-sectional shape. (See Patent Document 3 FIG. 1).

In this sealed rolling bearing, since the U-shaped seal member functions as a grease pocket, a sufficient amount of grease can be sealed inside the bearing to ensure the bearing life.
Japanese Patent Application Laid-Open No. 11-342459 JP-A-7-269575 JP 2005-268595 A SFK Catalog No. 4404G (P14, P15)

  However, the seal member provided in the bearings described in Patent Documents 1 and 2 enhances the sealing performance in the above-described poor environment in which the roll support device using the bearing is operated, and prevents water from entering the bearing. The purpose of this is to prevent the intrusion of foreign matter and foreign matter. For this reason, the removal from the bearing has not been considered. Therefore, in order to remove the seal member described in Patent Documents 1 and 2 from the bearing, for example, a tool or a jig is inserted between the seal member and the bearing ring of the bearing to which the seal member is fixed. It is necessary to remove the seal member by prying it open with the tool. Such a removal operation requires labor and may damage the bearing.

  In order to remove the seal member provided in the bearing described in Non-Patent Document 1 from the bearing, it is necessary to first remove the retaining ring using a tool or a jig, and then remove the seal member. However, there is a problem that the number of parts increases.

  As with the seal members described in Patent Documents 1 and 2, the seal member provided in the rolling bearing described in Patent Document 3 is also free from dust and dust inside the bearing under the above-mentioned poor environment in which the bearing is operated. The purpose is to prevent intrusion of water or the like. For this reason, the removal from the bearing has not been considered.

  Therefore, in order to remove the seal member described in Patent Document 3 from the bearing, for example, a tool or jig is inserted between the seal member and the bearing ring of the bearing to which the seal member is fixed. It is necessary to remove the seal member by prying it open. In such a removal operation, the bearing may be damaged or the seal member may be damaged, and it is difficult to investigate the thermal deterioration or deformation of the seal member after use or the heat history of the seal member after use.

  Therefore, an object is to easily remove the seal member without increasing the number of parts of the seal member and without damaging the bearing.

  In order to solve the above problems, the present invention provides a rolling bearing in which a rolling element is interposed between an inner ring and an outer ring, and a seal member is provided at an end between the inner ring and the outer ring. In this configuration, a protrusion for extracting the seal member is provided.

  If it does in this way, it will become easy to pull out the axial direction outward by pinching the projection with a removal tool or the like, and the seal member can be easily taken out.

  The seal member forming the protrusion is made of a core metal fixed to an end portion of the inner ring or the outer ring, and an elastic material provided on the core metal and in sliding contact with the inner peripheral surface of the outer ring or the outer peripheral surface of the inner ring. And a protrusion is provided on the cored bar.

  When the protrusion is provided on the metal core, when the protrusion is pulled out in the axial direction by a removal tool or the like, a pulling force is applied to the metal core, and the metal core is removed from the bearing without squeezing it. The member can be pulled out.

  The cored bar has an outer peripheral edge fixed to the end of the outer ring and an inner peripheral edge extending inward in the axial direction from the outer peripheral edge, and the protrusion is provided on the inner peripheral edge. When the protrusion is provided so as to be on the inner side in the axial direction from the axial outer end of the outer peripheral edge portion, when the rolling bearing is applied to the roll support device, it is possible to prevent interference between the protrusion and other components. .

  In the case of adopting the configuration related to the protrusion, the core bar has an outer peripheral edge fixed to an end of the outer ring, and an inner peripheral edge extending inward in the axial direction from the outer peripheral edge, and the outer peripheral edge The outer end of the part in the axial direction is located outside the both end faces of the inner ring and the outer ring, and a configuration in which the protrusion is provided on the outer peripheral edge part can be adopted.

  By adopting this configuration, for example, by pressing one end of the rod-shaped removal tool against the end surface of the outer ring and rotating the removal tool while pressing the side surface of the removal tool inserted between the end surface of the outer ring and the projection against the projection, The seal member can be removed from the outer ring by the lever principle. Since this principle can be used, the seal member can be removed with a smaller force than when the cored bar is pulled out in the axial direction by the removal tool, and the seal member can be pulled out without damaging the bearing. .

  Further, it is possible to adopt a configuration in which a flange portion is provided on the outer peripheral edge portion of the core metal, the protrusion is provided on the entire circumference of the outer peripheral edge portion of the core metal, and the flange portion is the protrusion. In this case, for example, the removal tool can be locked at a plurality of locations at arbitrary positions in the circumferential direction of the flange portion and pulled out in the axial direction. Thereby, since a pulling force acts on a wide range in the circumferential direction of the flange portion, the seal member can be pulled out straight in the axial direction without being distorted.

  There are various means for providing the protrusion on the core metal. For example, if the protrusion is formed by cutting and raising a part of the core metal, the seal member is formed by pressing or the like. The protrusions can be formed from the cored bar without increasing the number of parts.

  Moreover, by filling the cutout portion of the cored bar formed by cutting and raising the protrusion with the elastic material, water and foreign matter can be prevented from entering the bearing and sealing performance can be ensured. . Furthermore, for example, when the seal lip is provided (molded) on the seal member, the cutout portion can be filled with an elastic material that forms the seal lip, and another material (elastic material) that fills the cutout portion separately. No need to prepare. For this reason, an increase in the manufacturing cost of the seal member can be suppressed.

  Furthermore, in order to remove the seal member with a light force by applying force to a plurality of locations in the circumferential direction during the removal operation, a plurality of the protrusions may be provided at intervals in the circumferential direction of the seal member. Further, if the projection has a locking hole capable of locking the seal member extractor, the seal member extractor can be easily hooked on the lock hole and pulled out in the axial direction.

  If the bearing space between the inner ring and the outer ring is filled with grease having excellent heat resistance against temperature rise inside the bearing due to bearing operation, for example, a mixture of urea grease and fluorine grease, lubrication is smooth. The bearing life can be extended.

  If the elastic material has urea-based grease resistance, the seal lip molded with this elastic material is less susceptible to grease leakage even if it is immersed in grease containing a urea compound. It is possible to improve the durability of the rolling bearing.

  As described above, since the projection is provided on the core of the seal member as described above, the number of parts of the seal member does not increase. By removing the seal member by pinching the projection with a removal tool or the like and pulling it in the axial direction. Work can be done easily.

  Further, since the sealing member can be removed by pulling the protrusion, it is not necessary to insert a tool or the like between the sealing member and the bearing as in the prior art, and damage to the bearing can be prevented.

  Furthermore, since it becomes easy to remove the seal member, the state inside the bearing can be observed. If the bearing is in a state where it can be continuously used, the bearing can be used continuously by replacing the seal member. It becomes possible and the maintenance cost can be reduced.

  In addition, it is possible to investigate the reuse of the rolling bearing, the thermal deterioration or deformation due to the heat history of the seal member after use.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
The rolling bearing 10 of this 1st Embodiment is applied to the support apparatus of the slab guide roll of the continuous casting equipment shown in FIG. 1, for example, This roll support apparatus is the edge part of the slab guide roll 11 (roll 11). 11 a is inserted into the housing 12, and the roll 11 is rotatably supported with respect to the housing 12 by the rolling bearing 10 provided in the housing 12. Further, the roll 11 and the housing 12 are sealed with the first seal portion 13, the second seal portion 14, and the seal member 30 on both sides of the rolling bearing 10, respectively.

  As the rolling bearing 10, for example, a self-aligning roller bearing 10 can be adopted, and an inner ring 15 that fits on the outer periphery of the end 11 a of the roll 11 and has a double row raceway, and a concave spherical surface that fits on the inner periphery of the housing 12. The outer ring 16 having the raceway of the inner ring 15, the double-row spherical rollers 17 arranged in a freely rolling manner between the raceway surface of the inner ring 15 and the raceway surface of the outer ring 16, and the spherical rollers 17 spaced apart in the circumferential direction. A retainer 18 to be held and a seal member 30 attached to an end of the outer ring 16 on the roll center side are provided.

  The inner ring 15 includes a seal ring 21 of the second seal portion 14 fitted to the center side end portion 11b (shoulder portion 11b) of the roll 11, and a seal of the first seal portion 13 screwed to the end portion 11a of the roll 11. Positioning in the axial direction is performed by the ring 22. A lid 24 is fitted on the outer periphery of the seal ring 22 of the first seal portion 13 via an oil seal 23, and this lid 24 is attached to an end face of the end 11 a of the roll 11 of the housing 12 with a bolt (not shown) or the like. It is fixed by.

  Grease filled with grease G on both sides of the self-aligning roller bearing 10 between the first seal portion 13 for sealing the end portion 11a of the roll 11 and the second seal portion 14 for sealing the shoulder portion 11b. A portion 25 is formed, and the first and second seal portions 13 and 14 and the seal member 30 prevent entry of foreign matters such as water and dust.

  As the grease G sealed in the grease sealing portion 25 and the bearing space between the inner ring 15 and the outer ring 16, for example, a mixture of urea-based grease and fluorine-based grease can be used. If this grease G is used, the heat resistance is improved against the temperature rise inside the bearing due to the operation of the bearing, lubrication can be performed smoothly, and the bearing life can be extended.

  As shown in FIG. 2 and FIG. 3, the seal member 30 mounted on the roll center side end of the self-aligning roller bearing 10 includes a cored bar 31 fitted on the inner peripheral surface of the outer ring 16 and an outer peripheral surface of the inner ring 15. And a seal lip 32 made of an elastic material in sliding contact. The elastic material of the seal lip 32 only needs to have durability against the grease G, and for example, an elastic material having urea-based grease resistance can be used.

  The metal core 31 of the sealing member 30 is formed by pressing a steel plate, for example, an outer peripheral edge portion 33 extending inward in the axial direction, and radially inward from an axial outer end of the outer peripheral edge portion 33. The intermediate plate portion 34 extends, and the inner peripheral edge portion 35 extends inwardly in the axial direction from the inner diameter end of the intermediate plate portion 34 and toward the inner diameter direction.

  A part 36 is formed on the inner peripheral edge 35 of the core 31 by pressing it outwardly from the bearing, thereby forming a projection 36 for removing the seal member. A bifurcated seal lip 32 is provided by vulcanizing and molding the elastic material on the inner peripheral edge 35 of the metal core 31 on which the protrusions 36 are formed, and the metal core 31 is covered with the elastic material. At this time, the cutout portion 38 formed in the inner peripheral edge portion 35 of the core 31 from which the protrusion 36 is cut and raised is filled with the elastic material.

  When the cutout portion 38 is filled with the elastic material, water, dust and the like can be prevented from entering the inside of the bearing through the cutout portion 38.

  The cut-and-raised length a (projected length a) of the protrusion 36 formed by cutting and raising the core metal 31 is, for example, when the seal member 30 is pulled out by pinching with a removal tool or the like. The seal member 30 has a length that allows the seal member 30 to be pulled out, and the seal member 30 can be easily pulled out by pinching the projection 36 with a removal tool or the like.

  The protrusion 36 is formed so as to be on the inner side in the axial direction from the outer end in the axial direction of the outer peripheral edge portion 33 of the cored bar 31. When the protrusion 36 is formed in this way, when the seal member 30 is mounted on the end of the self-aligning roller bearing 10, the protrusion is protruded from the end surface of the bearing 10 (the outer end of the outer peripheral edge 33 of the core 31). 36 does not protrude. For this reason, interference with the seal member 30 and another member can be avoided.

  Further, as shown in FIG. 4, the protrusions 36 are formed at three equal intervals in the circumferential direction of the inner peripheral edge portion 35. By forming the projections 36 at three locations on the cored bar 31, the pulling force is evenly applied in the circumferential direction of the cored bar 31, so that the pulling force is reduced and the sealing member 30 can be removed with a light force. Note that the number of the protrusions 36 is not limited to three, and may be arbitrarily set as long as it is appropriately provided as long as the seal member 30 can be removed without damaging the self-aligning roller bearing 10.

  The protrusion 36 is provided with a locking hole 37 that penetrates the protrusion 36. By providing the locking hole 37, when the seal member 30 is taken out from the end of the outer ring 16, if the removal tool is locked in the locking hole 37 or a wire is passed, the protrusion 36 is pulled in the axial direction. It becomes easy and the sealing member 30 can be easily removed from the outer ring 16 end.

  The protrusion 36 is formed by cutting out a part of the inner peripheral edge portion 35 of the core metal 31 and raising (cutting up) the cutout portion. Two protrusions having a predetermined radial interval may be formed in the end portion, and the protrusion 36 may be formed by folding back between the notches outward in the axial direction. Further, the locking hole 37 penetrates the protrusion 36, but it may be a simple hole or groove that does not penetrate the protrusion 36. When the sealing member 30 is removed in the axial direction, the removal tool is engaged. Anything that can be stopped is acceptable.

  With the sealing member 30 configured as described above, a shaft is attached to the end of the outer ring 16 of the self-aligning roller bearing 10 on the roll center side in a state where the intermediate plate portion 34 of the core metal 31 faces outward in the axial direction. Insert inward direction. At this time, the outer peripheral edge 33 of the metal core 31 presses the inner peripheral surface of the outer ring 16, and the seal lip 32 comes into slidable contact (sliding contact) with the outer peripheral surface of the inner ring 15. The seal member 30 is fixed (attached) to the end portion on the roll center side.

  Thus, since the seal member 30 is attached to the end of the self-aligning roller bearing 10 on the roll center side, the center end (shoulder portion 11b) of the roll 11 includes the seal member 30 and the second end. Double sealing is performed by the seal portion 14, and it is possible to prevent foreign matters such as water and dust from entering the bearing. Further, the seal member 30 may be used for the first and second seal portions 13 and 14.

  On the other hand, in order to remove the seal member 30 attached to the self-aligning roller bearing 10, the protrusion 36 of the seal member 30 is pulled outward in the axial direction. That is, a removal tool or jig is locked in the locking hole 37 of the protrusion 36, or a wire is passed through the locking hole 37, and the tool or wire is pulled outward in the axial direction. What is necessary is just to remove 33 from the outer ring | wheel 16.

  Thus, if the protrusion 36 of the metal core 31 is pulled in the axial direction and the outer peripheral edge 33 of the metal core 31 is removed from the outer ring 16, the seal member 30 can be easily removed from the self-aligning roller bearing 10.

A second embodiment of the present invention is shown in FIG.
The rolling bearing 40 according to the second embodiment is applied to, for example, a railway vehicle main motor, and has an inner ring 41 and an outer ring having the same axial width as the inner ring 41 and an insulating layer formed on the outer peripheral portion and both end faces. 42, a plurality of circumferentially disposed cylindrical rollers 43 between the inner ring 41 and the outer ring 42, a cage 44 that holds the cylindrical rollers 43 at intervals, and a bearing space between the inner ring 41 and the outer ring 42 is sealed. The sealing member 45 is provided.

  The insulating layer is formed by spraying an insulating material such as ceramic. As the grease G sealed in the bearing space, for example, a mixture of urea-based grease and fluorine-based grease can be used as in the rolling bearing of the first embodiment described above. If this grease G is used, the heat resistance is improved against the temperature rise inside the bearing due to the operation of the bearing, lubrication can be performed smoothly, and the bearing life can be extended.

  The seal member 45 includes a cored bar 47 that is press-fitted into a seal locking stepped portion 46 provided on an end surface of the inner peripheral portion of the outer ring 42, and a seal lip 48 made of an elastic material. The seal lip 48 forms a labyrinth seal with the outer periphery of the inner ring 41. The elastic material of the seal lip 48 has durability against the grease G, and for example, an elastic body having urea-based grease resistance can be used.

  The metal core 47 has a cylindrical outer peripheral edge portion 49 fixed to the seal locking step 46 of the outer ring 42 and an inner peripheral edge portion 51 extending inward in the axial direction. The intermediate plate portion 50 is formed into a U-shaped cross-sectional shape that is integrally connected, and is a metal stamped product.

  The outer end in the axial direction of the outer peripheral edge portion 49 of the metal core 47 is positioned on the outer side in the axial direction from the end face of the outer ring 42 when the seal member 45 is press-fitted into the rolling bearing 40. A part thereof is cut and raised by press working, and projections 52 for extracting the seal member are formed at three equal intervals in the circumferential direction (see FIG. 6). Note that the number of the protrusions 52 is not limited to three, and may be arbitrarily set as long as necessary, and can be removed as long as the seal member 45 can be removed without damaging the rolling bearing 40.

  The protrusion 52 may be provided with a locking hole (not shown) penetrating the protrusion 52. When the seal member 45 is taken out from the outer ring 42, it is easy to pull the projection 52 in the axial direction by locking a removal tool in the locking hole or passing a wire, so that the seal member 45 can be easily pulled from the outer ring 42. This is because the can be removed. The locking hole penetrates the protrusion 52, but may be a simple hole or groove that does not penetrate the protrusion 52. When the seal member 45 is removed in the axial direction, the removal tool or the like is involved. Anything that can be stopped is acceptable.

  The protrusion 52 has a cut-and-raised height (protrusion height) such that when the sealing member 45 is removed, when the force is applied to the removal tool 54 pressed against the protrusion 52, the removal tool 54 does not come off the protrusion 52. What is necessary is just height (refer FIG. 7).

  A seal lip 48 is provided by vulcanizing and molding the elastic material at the distal end portion (inner axial end portion) of the inner peripheral edge 51 of the metal core 47, and the metal core 47 is covered with the elastic material. At this time, the cutout portion 53 formed in the outer peripheral edge portion 49 of the cored bar 47 from which the protrusion 52 is cut and raised is filled with the elastic material. When the cutout portion 53 is filled with an elastic material, dust and water can be prevented from entering the bearing from the cutout portion 53.

  The seal member 45 is press-fitted and fitted with the outer peripheral edge portion 49 to the seal locking step portion 46 of the outer ring 42 with the intermediate plate portion 50 of the metal core 47 facing outward in the axial direction. Accordingly, the outer peripheral edge portion 49 presses the inner peripheral portion of the seal locking step portion 46, and the seal lip 48 forms a labyrinth seal with the outer peripheral portion of the inner ring 41, so that the seal member 45 is provided at both ends of the rolling bearing 40. Is fixed.

As an example of a method for removing the seal member 45 fixed to the rolling bearing 40, the following method can be employed.
That is, first, the rod-shaped removal tool 54 is inserted between the outer ring 42 and the projection 52 of the seal member 45 (see FIG. 7A). With one end of the inserted removal tool 54 in contact with the end face of the outer ring 42, the other end of the removal tool 54 is moved away from the rolling bearing 40 while pressing the side surface of the removal tool against the protrusion 52 (FIG. 7). (See (b)).

  When the removal tool 54 is moved, one end of the removal tool 54 is a fulcrum, the other end is a force point, and the contact portion between the removal tool 54 and the projection 52 is an action point. Force acts. With this force, the outer peripheral edge 49 formed with the protrusion 52 and fixed to the outer ring 42 can be removed from the outer ring 41.

  As another method of removing the seal member 45, a method of removing the seal member 52 by holding the protrusion 52 with a tool or by pulling the protrusion 52 in the axial direction by locking a wire or the like can be adopted. The method of removing using this principle as described above is preferable because the force applied to the other end of the removal tool 54 can be made smaller than the force of directly pulling the protrusion 52 with a tool or the like.

A third embodiment of the present invention is shown in FIGS.
In the rolling bearing 40 according to the third embodiment, a seal member 45 is fixed to both ends of an inner ring 41 and an outer ring 42 by press-fitting, and a metal core 47 of the seal member 45 is fixed to a seal locking step 46 of the outer ring 42. The second embodiment is that the cylindrical outer peripheral edge portion 49 and the inner peripheral edge portion 51 extending inward in the axial direction are integrally connected by an annular intermediate plate portion 50 at the outer end in the axial direction. Although the form is common, the following configurations are different. Note that the same reference numerals are used for configurations that can be considered to be the same configurations as the second embodiment.

  That is, as shown in FIG. 8, the metal core 47 of the seal member 45 is configured to form a flange portion 55 in which the radial end portion of the intermediate plate portion 50 protrudes to the outer diameter side from the outer peripheral edge portion 49. . In this configuration, the flange portion 55 of the cored bar 47 of the seal member 45 is a protrusion (projection) 52 provided on the entire circumference of the outer peripheral edge portion 49 (see FIG. 9).

  In addition, you may provide the locking hole (illustration omitted) which penetrates the protrusion 52 in three places of the circumferential direction equal interval of this protrusion 52. As shown in FIG. When the seal member 45 is taken out from the outer ring 42, the protrusion 52 is pulled in the axial direction by locking a removal tool in the locking hole or passing a wire, and the seal member 45 can be removed from the outer ring 42. Because it can.

  As an example of a method for removing the seal member 45 fixed to the rolling bearing 40, a method using a removal tool 54 shown in FIG. 11 may be employed. The detachment tool 54 is obtained by integrally providing a cylindrical body 56 and a flange portion 57 provided at one end portion of the inner peripheral portion thereof, and dividing the half. The cylindrical body 56 has an inner diameter larger than that of the flange portion 55 of the seal member 45, and the flange portion 57 has an inner diameter that is the same as the outer diameter of the outer peripheral edge portion 49 of the seal member 45.

  In the above method, first, the flange portion 57 of the removal tool 54 is fitted to the outer peripheral edge portion 49 of the seal member 45 from both sides as shown in FIG. At this time, the flange portion 57 is engaged with the protrusion 52 of the seal member 45.

  Subsequently, in this locked state, the end surface on the outer ring 42 side of the removal tool 54 is held by hand, or a tool or the like is locked to the end surface, and the removal tool 54 is pulled in the axial direction. As a result, the pulling force applied to the flange portion 57 of the removal tool 54 acts evenly in the circumferential direction of the protrusion 52 of the seal member 45, so that the seal member 45 can be removed straight in the axial direction.

  As a result, the outer ring 42 and the seal member 45 can be removed without damaging them, so that it is possible to investigate reuse of the rolling bearing 40, thermal deterioration, deformation, etc. due to the heat history of the seal member 45 after use.

Sectional drawing which shows the roller support apparatus to which the rolling bearing which concerns on 1st Embodiment is applied. The expanded sectional view which shows the principal part of the sealing member of a rolling bearing same as the above Partially cut away enlarged side view showing the main part of the sealing member (A) Cross-sectional view showing the same sealing member, (b) Side view showing the same sealing member Sectional drawing of the rolling bearing which concerns on 2nd Embodiment. Side view seen from the outer periphery of the outer ring of the rolling bearing (A) is explanatory drawing which showed the method of removing the sealing member of a rolling bearing same as the above, (b) is explanatory drawing which shows the state which removed the sealing member by the removing method of (a) Sectional drawing of the rolling bearing which concerns on 3rd Embodiment Side view seen from the outer periphery of the outer ring of the rolling bearing Explanatory drawing which showed the method of removing a sealing member same as the above The perspective view which showed the removal tool used for the method of removing a sealing member same as the above

Explanation of symbols

10 Rolling bearings (Spherical roller bearings)
11 Roll 11a Roll end portion 11b Roll shoulder portion 12 Housing 13 First seal portion 14 Second seal portion 15 Inner ring 16 Outer ring 17 Spherical roller 18 Retainer 21 Seal ring 22 Seal ring 23 Oil seal 24 Lid 25 Grease enclosure 30 Seal member 31 Core metal 32 Seal lip 33 Outer peripheral edge 34 Intermediate plate part 35 Inner peripheral edge part 36 Projection 37 Locking hole 38 Cutout part 40 Rolling bearing (cylindrical roller bearing)
41 Inner ring 42 Outer ring 43 Cylindrical roller 44 Cage 45 Seal member 46 Seal locking step part 47 Core metal 48 Seal lip 49 Outer peripheral edge part 50 Intermediate plate part 51 Inner peripheral edge part 52 Projection (projection)
53 Cutout 54 Removal Tool 55 Flange 56 Cylindrical Body 57 Flange

Claims (11)

  In a rolling bearing sealing device in which a rolling element is interposed between an inner ring and an outer ring, and a seal member is provided at an end between the inner ring and the outer ring, a protrusion for removing the seal member is provided on the outer surface of the seal member. A rolling bearing sealing device characterized by.   The seal member includes a cored bar fixed to an end of the inner ring or the outer ring, and a seal lip formed on the cored bar and made of an elastic material slidably contacting the inner peripheral surface of the outer ring or the outer peripheral surface of the inner ring. The rolling bearing sealing device according to claim 1, wherein the protrusion is provided on the cored bar.   The cored bar has an outer peripheral edge fixed to the end of the outer ring and an inner peripheral edge extending inward in the axial direction from the outer peripheral edge, and the protrusion is provided on the inner peripheral edge. The rolling bearing sealing device according to claim 2, wherein the rolling bearing sealing device is provided so as to be located on an inner side in an axial direction from an outer end in an axial direction of the outer peripheral edge.   The metal core has an outer peripheral edge fixed to an end of the outer ring, and an inner peripheral edge extending inward in the axial direction from the outer peripheral edge, and the axial outer end of the outer peripheral edge is The rolling bearing sealing device according to claim 2, wherein the rolling bearing sealing device is located outside the both end faces of the inner ring and the outer ring, and the protrusion is provided on the outer peripheral edge.   5. The flange according to claim 4, wherein a flange portion is provided on the outer peripheral edge portion of the core metal, the protrusion is provided on an entire circumference of the outer peripheral edge portion of the core metal, and the flange portion is the protrusion. Rolling bearing sealing device.   The rolling bearing sealing device according to claim 2, wherein the protrusion is formed by cutting and raising a part of the core metal.   The rolling bearing sealing device according to claim 6, wherein a cutout portion of the cored bar formed by cutting and raising the protrusion is filled with the elastic material.   The rolling bearing sealing device according to claim 1, wherein a plurality of the protrusions are provided at intervals in the circumferential direction of the seal member.   The rolling bearing sealing device according to claim 1, wherein the protrusion has a locking hole capable of locking the seal member extractor.   The rolling bearing sealing device according to any one of claims 1 to 9, wherein a bearing space between the inner ring and the outer ring is filled with a mixture of urea grease and fluorine grease.   The rolling bearing sealing device according to any one of claims 2 to 10, wherein the elastic material has urea-based grease resistance.

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