JP2020118267A - Sealing device - Google Patents

Abstract

To provide a sealing device which can suppress the intrusion of foreign matters, and can be easily removed from a rolling bearing.SOLUTION: A sealing device has an inside seal member fixed to an inside member of a rolling bearing, and an outside seal member fixed into a hole of an outside member of the rolling bearing. The inside seal member has a sleeve and a flange. The outside seal member comprises a rigid part and an elastic part. A seal lip contacting with the sleeve, and a dust lip contacting with the flange are formed at the elastic part. The rigid part has a cylinder portion fit into the hole of the outside member, an annular portion, a plurality of protruding portions in an axial line direction protruding from the annular portion, and a flange expanded to the outside in a radial direction from the cylinder portion, and opposing the outside member. A penetration screw hole is formed at the flange of the outside seal member, and a guide part for guiding the pullout of the outside seal member or the inside seal member by a removal jig is arranged at the protruding portion in the axial line direction, or the inside seal member.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sealing device that seals the inside of a rolling bearing.

Patent Document 1 discloses a sealing device that seals the inside of a rolling bearing suitable for use in a railway vehicle. The sealing device comprises an inner ring, which is supported by a rotary machine element, and an outer ring, which comprises a seal body made of an elastomeric material, which is supported by the housing to be sealed. The seal body has a plurality of lips extending toward the inner ring.

JP, 2005-224788, A

Rolling bearings of rail cars or large automobiles such as trucks and buses are heavily loaded, exposed to a large amount of dust, and are significantly affected by temperature changes. Especially around the railroad car, a large amount of iron powder generated due to the wear of the railroad exists. As the rolling bearing is repaired, it is necessary to replace the sealing device. Therefore, a sealing device that can be easily removed is desired.

Further, there is a demand for a sealing device capable of further reducing the intrusion of foreign matter from the outside. In particular, there is a demand for a sealing device that can suppress the entry of foreign matter even if the shaft inserted into the rolling bearing or the inner member of the rolling bearing is eccentric or has a low roundness.

Therefore, the present invention provides a sealing device that can suppress the entry of foreign matter and can be easily removed from the rolling bearing.

A sealing device according to an aspect of the present invention is a sealing device that is disposed between an inner member and an outer member of a rolling bearing, which relatively rotate, and seals a gap between the inner member and the outer member. And an annular inner seal member fixed to the inner member, and an annular outer seal member fixed to the inner surface of the hole of the outer member and in slidable contact with the inner seal member. The inner seal member has a sleeve fixed to the inner member, and a flange that is integrally connected to an end portion of the sleeve on the atmosphere side and extends radially outward from the sleeve. The outer seal member includes a rigid portion made of a rigid material and an elastic portion made of an elastic material fixed to the rigid portion. A seal lip that slidably contacts the sleeve of the inner seal member is formed in the elastic portion, and a dust lip that slidably contacts the flange of the inner seal member is formed in the elastic portion. Has been done. The rigid portion includes a cylindrical portion fitted in a hole of the outer member, an annular portion arranged radially inside the cylindrical portion, and an axial direction of the outer seal member from the annular portion toward the atmosphere side. A plurality of axially projecting portions, and a flange that extends radially outward from the cylindrical portion and faces the outer member. The flange of the inner seal member is arranged on the atmosphere side with respect to the axially protruding portion. At least one screw hole penetrating the flange is formed in the flange of the rigid portion of the outer seal member, and the outer seal member is attached to the axial protruding portion or the inner seal member by a removal jig. Alternatively, at least one guide portion for guiding the pulling of the inner seal member is provided.

In this aspect, since the dust lip of the outer seal member slidably contacts the flange of the inner seal member, the shaft inserted into the rolling bearing or the inner member of the rolling bearing is eccentric or has a low roundness. Even if it does, the dust lip can maintain contact with the flange over the entire circumference. Therefore, the sealing device can suppress the intrusion of foreign matter even if the shaft inserted into the rolling bearing or the inner member of the rolling bearing is eccentric or has a low roundness. Further, a removal jig for removing the sealing device from the rolling bearing can be fixed to the flange of the outer seal member by a male screw screwed into a screw hole formed in the flange of the outer seal member. When removing the sealing device from the rolling bearing, the male screw screwed into the threaded hole of the flange is rotated to bring the tip of the male screw into contact with the outer member of the rolling bearing, whereby the flange is relatively separated from the outer member. .. This makes it easier to pull out the outer seal member from the hole of the outer member. After that, by pulling the male screw and/or the removal jig fastened to the flange, the flange is further separated from the outer member, and the guide portion of the sealing device is pulled along the axial direction by the removal jig fixed to the flange. .. This allows the sealing device to be easily removed.

It is sectional drawing of the sealing device which concerns on 1st Embodiment of this invention. It is a perspective view which shows the rigid part of the outer side sealing member of the sealing device of FIG. It is a top view of the rigid part of FIG. It is sectional drawing which shows the sealing device which concerns on 1st Embodiment from which the male screw and the removal jig were removed. It is a sectional view of the sealing device concerning a 1st embodiment removed from a rolling bearing. It is sectional drawing of the sealing device which concerns on the modification of 1st Embodiment. It is sectional drawing of the sealing device which concerns on the other modification of 1st Embodiment. It is sectional drawing of the sealing device which concerns on 2nd Embodiment of this invention. It is sectional drawing of the sealing device which concerns on 3rd Embodiment of this invention.

Various embodiments according to the present invention will be described below with reference to the accompanying drawings. The scale of the drawings is not necessarily accurate and some features may be exaggerated or omitted.

First Embodiment FIG. 1 shows a bearing for an axle of a railway vehicle which is an example of a rolling bearing 2 in which a sealing device 1 according to a first embodiment of the present invention is used. However, the application of the present invention is not limited to bearings for railway vehicles, and the present invention is also applicable to bearings for axles of large automobiles such as trucks and buses. Further, the illustrated rolling bearing 2 is an RCT (Rotating End Cap Tapered Roller) bearing, but the application of the present invention is not limited to the RCT bearing, and an RCC (Rotating End Cap Capacitor) having another type of rolling element is used. The present invention is also applicable to other rolling bearings such as Cylindrical Roller) bearings, ball bearings and needle bearings.

As shown in FIG. 1, the rolling bearing 2 includes an inner ring (inner member) 6 into which an axle 4 is inserted, an outer ring (outer member) 8 arranged outside the inner ring 6, an inner ring 6 and an outer ring 8. It has a plurality of rollers 10 arranged in a row in between, and a retainer 14 that holds the rollers 10 in place. The outer ring 8 is fixed, while the inner ring 6 rotates as the axle 4 rotates. The cage 14 is fixed to the outer ring 8.

The sealing device 1 is arranged between the inner ring 6 and the outer ring 8 that rotate relatively to each other, and seals the gap between the inner ring 6 and the outer ring 8. The action of the sealing device 1 prevents or reduces the outflow of grease, that is, the lubricant from the inside of the rolling bearing 2, and at the same time, prevents foreign substances (water (including muddy water or salt water) and/or Alternatively, inflow of dust (including iron powder) is prevented or reduced. In FIG. 1, arrow D shows an example of the direction of the flow of foreign matter from the outside.

Although only the left side portion with respect to the axle 4 is shown in FIG. 1, the sealing device 1 and the rolling bearing 2 have rotationally symmetrical shapes. The upper side of FIG. 1 is the bearing inner side B, and the lower side is the atmosphere side A. However, a sealing device similar to the sealing device 1 is provided on the opposite side of the sealing device 1 with the rolling bearing 2 interposed therebetween.

The sealing device 1 includes an annular inner seal member 20 and an annular outer seal member 30. The inner seal member 20 is fixed to the inner ring 6. The outer seal member 30 is fixed to the inner surface of the hole 8A of the outer ring 8, and the inner seal member 20 slidably contacts the outer seal member 30.

The inner seal member 20 is made of a rigid material such as metal. The inner seal member 20 includes a sleeve 22, a flange 24, and an outer sleeve 26. The sleeve 22 is fixed to the inner ring 6. The fixing method may be an interference fit, for example. The flange 24 is integrally connected to an end portion of the sleeve 22 on the atmosphere side and radially extends outward from the sleeve 22. The outer sleeve 26 extends in the axial direction of the inner seal member 20 from the outer edge of the flange 24 toward the bearing inner side B.

The outer seal member 30 has a double structure including a rigid portion 32 formed of a rigid material, for example, a metal, and an elastic portion 34 formed of an elastic material, for example, an elastomer. The rigid portion 32 reinforces the elastic portion 34.

The rigid portion 32 has a cylindrical portion 36, an annular portion 38, a plurality of axial protruding portions 40, a plurality of inner extending portions 42, and a flange 43.

The cylindrical portion 36 is fitted into the hole 8A of the outer ring 8 by interference fitting and is fixed to the inner surface of the hole 8A. The cylindrical portion 36 has double cylindrical portions 36A and 36B that are stacked in the radial direction, and the ends of the cylindrical portions 36A and 36B on the bearing inner side B are connected.

The annular portion 38 is integrally connected to the end of the cylindrical portion 36B inside the cylindrical portion 36 on the atmosphere side A and extends from the cylindrical portion 36 inward in the radial direction. The annular portion 38 extends in a plane perpendicular to the axial direction of the outer seal member 30.

The plurality of axially projecting portions 40 project from the annular portion 38 toward the atmosphere side A in the axial direction of the outer seal member 30. As shown in FIGS. 2 and 3, the plurality of axial projecting portions 40 have a shape in which a plurality of portions of the annular portion 38 that are spaced apart at angular intervals in the circumferential direction are bent. In addition, the plurality of locations in the annular portion 38 where the plurality of axially protruding portions 40 are not formed are continuous with the plurality of inner extension portions 42 that extend radially inward from the annular portion 38. Preferably, the axially projecting portions 40 are equiangularly spaced and the inner extension portions 42 are also equiangularly spaced, although the angular spacings need not be equal. In this embodiment, eight axial protrusions 40 and eight inner extensions 42 are provided, but the number of axial protrusions 40 and the number of inner extensions 42 are not limited to two or more. You can

As shown in FIGS. 1 to 3, a concave portion (guide portion) 44 that extends radially inward is formed on the radially outer surface of each axial projecting portion 40. In this embodiment, the recess 44 is a through hole, but the recess 44 does not have to penetrate the axial protruding portion 40. Further, in this embodiment, the recess 44 is formed in each axial projecting portion 40, but the recess 44 may be formed in any one of the axial projecting portions 40. That is, the number of recesses 44 may be one or more.

The flange 43 of the rigid portion 32 of the outer sealing member 30 is integrally connected to the end of the outer cylindrical portion 36A of the cylindrical portion 36 on the atmosphere side A, and extends radially outward from the cylindrical portion 36. The flange 43 extends in a plane perpendicular to the axial direction of the outer seal member 30, and the outline of the flange 43 is circular. The flange 43 extends outside the hole 8A of the outer ring 8 and faces the end surface of the outer ring 8. Preferably, as shown in FIG. 1, the flange 43 is brought into surface contact with the end surface of the outer ring 8, but there may be a slight gap between the flange 43 and the end surface of the outer ring 8.

The flange 43 is formed with at least one screw hole 43a penetrating the flange 43. In this embodiment, the eight screw holes 43a are arranged at equal angular intervals, but the angular intervals may not be equal. Each screw hole 43a is arranged at a position overlapping any one of the recesses 44 in the radial direction. In this embodiment, eight screw holes 43a corresponding to the eight recesses 44 are formed, but the number of the screw holes 43a may be one or more like the number of the recesses 44.

As shown in FIG. 1, the elastic portion 34 of the outer seal member 30 includes an annular base portion 50 supported by the rigid portion 32, a seal lip 52, a dust lip 54, a radial protrusion 56, and a cylindrical wall portion 60. Have and.

The base portion 50 of the elastic portion 34 is an annular portion arranged radially inside the plurality of axially protruding portions 40 of the rigid portion 32, and is fixed to the plurality of inner extended portions 42 of the rigid portion 32. A plurality of inner extension portions 42, which are arranged intermittently in the circumferential direction, are embedded in the annular base portion 50 which is continuous in the circumferential direction, and the inner extension portions 42 reinforce the base portion 50.

The seal lip 52 is a plate-shaped ring extending from the base 50 and slidably contacting the outer peripheral surface of the sleeve 22 of the inner seal member 20. The seal lip 52 mainly has a function of preventing or reducing grease leakage from the bearing inner side B to the atmosphere side A. The seal lip 52 has a base end portion 52a extending from the base portion 50 toward the atmosphere side A and the inside in the radial direction, and a tip portion 52b extending from the base end portion 52a toward the bearing inside side B and toward the inside in the radial direction. The tip portion 52b slidably contacts the outer peripheral surface of the sleeve 22 of the inner seal member 20 over the entire circumference. The thickness of the base end portion 52a is larger than the thickness of the tip end portion 52b.

The dust lip 54 is a plate-shaped ring that extends from the base 50 and slidably contacts the side surface of the flange 24 of the inner seal member 20 on the bearing inner side B side. The dust lip 54 has a function of mainly preventing or reducing the intrusion of foreign matter from the atmosphere side A into the bearing inner side B. The dust lip 54 has a base end portion 54a extending from the base portion 50 toward the atmosphere side A and the inside in the radial direction, and a tip end portion 54b extending from the base end portion 54a toward the atmosphere side A and toward the outside in the radial direction. The tip portion 54b slidably contacts the side surface of the flange 24 of the inner seal member 20 on the bearing inner side B side over the entire circumference. The thickness of the base end portion 54a is larger than the thickness of the tip end portion 54b.

The radial projection 56 projects inward in the radial direction from the inner end edge of the base portion 50. The radial protrusion 56 has a trapezoidal cross section that is wide on the outside in the radial direction and narrow on the inside. The radial protrusion 56 does not contact the inner sealing member 20, and a small annular gap 58 is provided between the radial protrusion 56 and the sleeve 22 of the inner sealing member 20. The gap 58 hinders the flow of grease from the bearing inner side B to the atmosphere side A and reduces the amount of grease reaching the seal lip 52, thereby assisting the sealing performance of the seal lip 52.

The cylindrical wall portion 60 is a cylindrical portion that extends from the outer end edge of the base portion 50 toward the flange 24 of the inner seal member 20, and is fixed to the plurality of axially protruding portions 40 of the rigid portion 32. A plurality of axial projecting portions 40, which are arranged intermittently in the circumferential direction, are embedded in a cylindrical tubular wall portion 60 that is continuous in the circumferential direction. The axial projecting portion 40 includes the tubular wall portion 60. Reinforce.

In the elastic portion 34, not only the inner extended portion 42 of the rigid portion 32, but also a part of the annular portion 38 and the entire axial protruding portions 40 are embedded. Specifically, a part of the surface of the annular portion 38 on the atmosphere side A is covered with a part 62 of the elastic portion 34, and a part of the surface of the annular portion 38 on the bearing inner side B of the elastic portion 34. The portion 64 is covered, and the axially protruding portion 40 is covered by the cylindrical wall portion 60 of the elastic portion 34. However, the annular portion 38 need not be covered with the elastic material.

A plurality of axially projecting portions 40 and a cylindrical wall portion 60 of the elastic portion 34, which are intermittently provided in the rigid portion 32 of the outer sealing member 30, extend toward the flange 24 of the inner sealing member 20. The cylinder wall portion 60 does not contact the flange 24, and a gap 68 is provided between the cylinder wall portion 60 and the flange 24.

The outer sleeve 26 of the inner seal member 20 is arranged outside the cylindrical wall portion 60. The tubular wall portion 60 does not contact the outer sleeve 26, and a gap 70 is provided between the tubular wall portion 60 and the outer sleeve 26.

As is apparent from the above description, the flange 24 of the inner seal member 20 is arranged on the atmosphere side with respect to the cylindrical wall portion 60 that covers the axially protruding portion 40, the seal lip 52, and the dust lip 54. That is, the cylindrical wall portion 60 of the outer seal member 30, the seal lip 52, and the dust lip 54 are arranged in the space surrounded by the sleeve 22, the flange 24, and the outer sleeve 26 of the inner seal member 20.

In this embodiment, the axial protruding portion 40 is covered with the cylindrical wall portion 60 of the elastic portion 34, so that the elastic portion 34 closes the recess 44 formed in the axial protruding portion 40. In the portion of the cylindrical wall portion 60 of the elastic portion 34 that covers the radially outer surface of each axially protruding portion 40, the portion 72 that closes the concave portion 44 of the elastic portion 34 is recessed. In the manufacture of the sealing device 1, the material of the elastic portion 34 largely contracts in the vicinity of the recess 44, whereby the portion 72 can be recessed. Alternatively, the work of recessing the portion 72 may be performed after the manufacturing of the sealing device 1.

The sealing device 1 further includes at least one male screw 73 and at least one removing jig 74 for removing the sealing device 1 from the rolling bearing 2.

The male screw 73 has a screw portion and a head portion. Although not shown, the head is provided with a mechanism for rotating the male screw 73 around its axis, for example, a cross groove or a linear groove. The male screw 73 may be a hexagon bolt or a butterfly bolt. The male screw 73 may be a hexagon socket screw having no head.

The removal jig 74 is made of a rigid material such as metal. In this embodiment, as shown in FIGS. 1 and 3, the removal jig 74 is a rectangular flat plate and has a through hole 74a. A female screw into which the screw portion of the male screw 73 is screwed may be formed on the inner peripheral surface of the through hole 74a, or a female screw may not be formed so that the screw portion of the male screw 73 can freely pass therethrough.

The threaded portion of the male screw 73 is passed through the through hole 74 a of the removal jig 74, and is further screwed into the screw hole 43 a of the flange 43 of the rigid portion 32 of the outer seal member 30. Therefore, the removal jig 74 is fixed to the flange 43 of the rigid portion 32 of the outer seal member 30 with the male screw 73.

The end of the removal jig 74 is inserted into the recess 44 of the axially protruding portion 40 of the rigid portion 32 of the outer seal member 30. Therefore, when the removal jig 74 is pulled toward the atmosphere side A with a strong force, the recess 44 is captured by the removal jig 74, and the outer seal member 30 can be pulled out from the hole 8A of the outer ring 8. In this way, the recess 44 functions as a guide portion that guides the pulling of the outer seal member 30 by the removal jig 74.

As shown by phantom lines in FIG. 3, four removal jigs 74 are fixed to the four screw holes 43 a of the flange 43. Thus, the removal jig 74 does not have to be fixed to all the eight screw holes 43a. That is, the number of the removing jigs 74 may be one or more. Further, the number of screw holes 43a to which the removal jig 74 is fixed may be one or more.

In this embodiment, the removal jig 74 is a rectangular flat plate, but the outline of the removal jig 74 is not limited to a rectangle, and the removal jig 74 may have a step.

FIG. 4 shows the sealing device 1 from which the male screw 73 and the removal jig 74 have been removed. As shown in FIG. 4, the sealing device 1 can be used without the male screw 73 and the removing jig 74. In that sense, the male screw 73 and the removing jig 74 are not essential, and the male screw 73 and the removing jig 74 are not necessary. The sealing device 1 without the jig 74 can be called a sealing device.

With the repair of the rolling bearing 2, it is necessary to replace the sealing device 1. The work of removing the sealing device 1 will be described below.

First, regarding the sealing device 1 without the male screw 73 and the removing jig 74 shown in FIG. 4, at least one removing jig is formed by at least one male screw 73 screwed into the screw hole 43a formed in the flange 43 of the outer seal member 30. 74 is fixed to the flange 43 of the outer seal member 30, and the end of the removal jig 74 is inserted into the recess 44 of the axial protruding portion 40 of the rigid portion 32 of the outer seal member 30. As a result, the removal jig 74 captures the recess 44. When the recess 44 is blocked by the elastic portion 34 as in this embodiment, that portion is largely compressed by the end portion of the removal jig 74. The part may be damaged.

Since the screw hole 43a is arranged at a position that overlaps the recess 44 in the radial direction, the screw hole 43a can be used as a mark when the removal jig 74 is inserted into the recess 44. In this way, the sealing device 1 having the male screw 73 and the removing jig 74 shown in FIG. 1 is manufactured.

As described above, even when the plurality of screw holes 43a are provided in the flange 43 and the plurality of recesses 44 are provided in the outer sealing member 30, at least one male screw 73 is provided in at least one screw hole 43a. The removal jig 74 may be fixed and the end of at least one removal jig 74 may be inserted into the at least one recess 44. However, in order to remove the sealing device 1 from the rolling bearing 2 by applying a force as evenly as possible in the circumferential direction of the sealing device 1, a plurality of male screws 73 are used to remove and remove the sealing device 1 into the screw holes 43a arranged at equiangular intervals, respectively. It is preferable to fix the tool 74 and insert the ends of the plurality of removal jigs 74 arranged at equal intervals into the plurality of recesses 44 arranged at equal intervals.

Regarding the sealing device 1 in which the male screw 73 and the removal jig 74 are provided, as shown in FIG. 5, the male screw 73 screwed into the screw hole 43 a through which the flange 43 penetrates is rotated, and the tip of the male screw 73 is rolled. By contacting the end surface of the second outer ring 8, the flange 43 is relatively separated from the end surface of the outer ring 8. As a result, the restraining force of the hole 8A of the outer ring 8 on the cylindrical portion 36 of the outer seal member 30 is weakened, and the outer seal member 30 is easily pulled out from the hole 8A of the outer ring 8.

Thereafter, by pulling the male screw 73 and/or the removal jig 74 fastened to the flange 43, the flange 43 is further separated from the outer ring 8, and the removal jig 74 fixed to the flange 43 is used to move the outer side along the axial direction. The recess 44 of the seal member 30 is pulled. As a result, the outer seal member 30 can be moved in the axial direction, and the outer seal member 30 can be pulled out from the hole 8A of the outer ring 8 of the rolling bearing 2. Once the cylindrical portion 36 of the rigid portion 32 of the outer seal member 30 is partly separated from the inner surface of the hole 8A of the outer ring 8, the outer seal member 30 is elastically deformed to utilize the outer seal member 30 of the rolling bearing 2. It is easy to pull out from the hole 8A of the outer ring 8. When the outer seal member 30 is pulled out, the flange 24 is pushed by the tubular wall portion 60 of the outer seal member 30, so that the inner seal member 20 fixed to the inner ring 6 can also be pulled out together with the outer seal member 30. In this way, the sealing device 1 can be easily removed. However, it is not essential to remove the outer seal member 30 and the inner seal member 20 at the same time, and the outer seal member 30 may be withdrawn from the outer ring 8 after the inner seal member 20 is withdrawn from the inner ring 6.

In this embodiment, since the dust lip 54 of the outer seal member 30 slidably contacts the flange 24 of the inner seal member 20, the axle 4 inserted into the rolling bearing 2 or the inner ring 6 of the rolling bearing 2 is eccentric. Even if the dust lip 54 has a low circularity, the dust lip 54 can maintain contact with the flange 24 over the entire circumference. Therefore, the sealing device 1 can suppress foreign matter from entering even if the axle 4 inserted into the rolling bearing 2 or the inner ring 6 of the rolling bearing 2 is eccentric or has a low roundness.

Further, the removal jig 74 for removing the sealing device 1 from the rolling bearing 2 is fixed to the flange 43 of the outer seal member 30 by the male screw 73 screwed into the screw hole 43 a formed in the flange 43 of the outer seal member 30. be able to. When the sealing device 1 is removed from the rolling bearing 2, the male screw 73 screwed into the threaded hole 43a of the flange 43 is rotated to bring the tip of the male screw 73 into contact with the outer ring 8 of the rolling bearing 2 so that the flange 43 is removed. It is relatively separated from the outer ring 8. This facilitates pulling out the outer seal member 30 from the hole 8A of the outer ring 8. Thereafter, by pulling the male screw 73 and/or the removal jig 74 fastened to the flange 43, the flange 43 is further separated from the outer ring 8, and the removal jig 74 fixed to the flange 43 is used to move the outer side along the axial direction. The recess 44 of the seal member 30 is pulled. As a result, the sealing device 1 can be easily removed from the rolling bearing 2.

In this embodiment, the recess 44 is formed as a guide portion on the radially outer surface of at least one of the axially projecting portions 40 of the plurality of axially projecting portions 40. Therefore, the axially protruding portion 40 is pulled in the axial direction by the removal jig 74 fixed to the flange 43 of the outer seal member 30, so that the outer seal member 30, preferably together with the inner seal member 20, is rolled bearing. It can be pulled out from the hole 8A of the second outer ring 8. The rigid portion 32 of the outer sealing member 30 has a plurality of axial projecting portions 40, and the rigid portion 32 is reinforced in the axial direction of the outer sealing member 30 by the axial projecting portions 40, so that When pulled along, the rigid portion 30 is less likely to break. Therefore, the sealing device 1 can be easily removed.

As described above, as shown in FIG. 4, the sealing device 1 can be used without the male screw 73 and the removing jig 74. However, by providing the male screw 73 and the removing jig 74 in advance in the sealing device 1, the removal work of the sealing device 1 can be completed quickly. Further, since the male screw 73 is screwed into the screw hole 43a, it is possible to prevent foreign matter from accumulating in the screw hole 43a. Even if the removal jig 74 is not provided in advance, the male screw 73 may be previously screwed into the screw hole 43a in order to suppress the accumulation of foreign matter in the screw hole 43a.

In this embodiment, the recess 44 formed in the axially protruding portion 40 is closed by the elastic portion 34. However, in the portion of the elastic portion 34 that covers the radially outer surface of each axially protruding portion 40, the portion 72 that closes the recess 44 of the elastic portion 34 is recessed. Therefore, even if the radially outer surface of the axially protruding portion 40 is covered with the elastic portion 34, the position of the recess 44 can be easily recognized visually, and the removal jig 74 is inserted into the recess 44. At this time, the portion 72 can be used as a mark.

In this embodiment, the plurality of axial projecting portions 40 have a shape in which a plurality of portions of the annular portion 38 of the rigid portion 32, which are spaced apart at angular intervals in the circumferential direction, are bent, and the annular portion 38. Of these, the plurality of locations where the plurality of axially protruding portions 40 are not formed are continuous with the plurality of inner extended portions 42 that extend radially inward from the annular portion 38. As described above, not only the plurality of axial protrusions are provided on the rigid portion 32, but also the plurality of inner extended portions 42 that are spaced apart at angular intervals in the circumferential direction are provided on the rigid portion 32. The axial protruding portion 40 and the inner extending portion 42 reinforce the elastic portion 34. Therefore, the strength of the elastic portion 34 provided with the seal lip 52 and the dust lip 54 is increased.

In this embodiment, the elastic portion 34 includes a cylindrical tubular wall portion 60 that extends toward the flange 24 of the inner seal member 20, and the plurality of axially protruding portions 40 are embedded in the tubular wall portion 60. A gap 68 is provided between the wall portion 60 and the flange 24. The outer sleeve 26 of the inner seal member 20 is arranged outside the tubular wall portion 60, and a gap 70 is provided between the tubular wall portion 60 and the outer sleeve 26. Even if foreign matter from the outside tries to enter the sealing device 1, many foreign matter is repelled by the cylindrical wall portion 60 of the outer seal member 30, the outer sleeve 26 of the inner seal member 20, or the flange 24 of the inner seal member 20. The foreign matter that has passed through the gap 70 between the cylindrical wall portion 60 and the outer sleeve 26 and the gap 68 between the cylindrical wall portion 60 and the flange 24 reaches the dust lip 54, but these gaps 68, 70 are made smaller. By setting, the amount of foreign matter reaching the dust lip 54 can be reduced. Since the tubular wall portion 60 is reinforced by the plurality of axially projecting portions 40 embedded in the tubular wall portion 60, the tubular wall portion 60 can withstand a strong force from foreign matter even if the force is strong.

In this embodiment, the dust lip 54 includes a proximal end portion 54 a extending radially inward and a distal end portion 54 b extending radially outward, and the distal end portion 54 b slides on the flange 24 of the inner seal member 20. Contact as much as possible. Therefore, even if the axle 4 inserted into the rolling bearing 2 or the inner ring 6 of the rolling bearing 2 is eccentric or has a low roundness, the dust lip 54 is substantially even over the entire circumference with respect to the flange 24. Contact with different force. In this way, the sealing performance of the dust lip 54 is ensured over the entire circumference. Further, since the tip portion 54b of the dust lip 54 exerts a force on the flange 24 in the axial direction rather than the radial direction, it is possible to suppress an increase in the torque applied to the shaft.

In this embodiment, the seal lip 52 has a bent shape including a base end portion 52a extending toward the atmosphere side A and a tip end portion 52b extending toward the bearing inner side B, and the tip end portion 52b is an inner seal member. The outer peripheral surface of the sleeve 22 of 20 slidably contacts. Since the seal lip 52 has a bent shape, the seal lip 52 is easily deformed. Therefore, even if the axle 4 inserted into the rolling bearing 2 or the inner ring 6 of the rolling bearing 2 is eccentric or has a low roundness, the seal lip 52 is substantially even over the entire circumference with respect to the flange 24. Contact with different force. In this way, the sealing performance of the seal lip 52 is ensured over the entire circumference.

FIG. 6 is a cross-sectional view of the sealing device 80 according to the modified example of the first embodiment. In the sealing device 80, a projection (guide portion) 82 that protrudes outward in the radial direction is formed on the surface on the outer side in the radial direction of each axially protruding portion 40, instead of the recess 44. The removal jig 74 is arranged closer to the bearing inner side B than the protrusion 82. Other features are the same as in the first embodiment.

In this modified example, if the removal jig 74 is pulled toward the atmosphere side A with a strong force, the projection 82 is captured by the removal jig 74, and the outer seal member 30 can be pulled out from the hole 8A of the outer ring 8. is there. In this way, the protrusion 82 functions as a guide portion that guides the pulling of the outer seal member 30 by the removal jig 74.

The removal operation of the sealing device 80 is the same as the removal operation of the sealing device 1 described above, except that the protrusion 82 is used instead of the recess 44. In the sealing device 80, the projection 82 is formed on each axial projecting portion 40, but the projection 82 may be formed on any one of the axial projecting portions 40. That is, like the recesses 44, the number of the protrusions 82 may be one or more.

Since the position of the protrusion 82 can be easily recognized visually, the protrusion 82 can be used as a mark when the removal jig 74 is hooked on the protrusion 82.

FIG. 7 is a cross-sectional view of a sealing device 84 according to another modification of the first embodiment. In the sealing device 84, neither the concave portion 44 nor the protrusion 82 is provided in each axial protruding portion 40. In this modification, the inner seal member 20 itself, more specifically, the outer sleeve 26 is used as a guide portion for guiding the pulling of the inner seal member 20 by the removal jig 74. The removal jig 74 is arranged closer to the bearing inner side B than the flange 24 and the outer sleeve 26 of the inner seal member 20.

Although not shown in detail, in the work of removing the sealing device 84, the male screw 73 screwed into the threaded hole 43a of the flange 43 is rotated to bring the tip of the male screw 73 into contact with the end surface of the outer ring 8 of the rolling bearing 2. By doing so, the flange 43 is relatively separated from the end surface of the outer ring 8. As a result, the restraining force of the hole 8A of the outer ring 8 on the cylindrical portion 36 of the outer seal member 30 is weakened, and the outer seal member 30 is easily pulled out from the hole 8A of the outer ring 8.

Thereafter, by pulling the male screw 73 and/or the removal jig 74 fastened to the flange 43, the flange 43 is further pulled away from the outer ring 8, and the axis line is removed by the removal jig 74 fixed to the flange 43 of the outer seal member 30. The outer sleeve 26 of the inner seal member 20 is pulled along the direction. As a result, the inner seal member 20 can be moved in the axial direction together with the outer seal member 30, and the outer seal member 30 and the inner seal member 20 can be extracted from the hole 8A of the outer ring 8 of the rolling bearing 2. Once the cylindrical portion 36 of the rigid portion 32 of the outer seal member 30 is partly separated from the inner surface of the hole 8A of the outer ring 8, the outer seal member 30 is elastically deformed to utilize the outer seal member 30 of the rolling bearing 2. It is easy to pull out from the hole 8A of the outer ring 8. In this way, the sealing device 84 can be easily removed.

Also in the modified examples of FIGS. 6 and 7, the sealing devices 80 and 84 can be used without the male screw 73 and the removal jig 74. However, if the male screw 73 and the removing jig 74 are provided in advance in the sealing devices 80 and 84, the removal work of the sealing devices 80 and 84 can be completed quickly. Further, since the male screw 73 is screwed into the screw hole 43a, it is possible to prevent foreign matter from accumulating in the screw hole 43a. Even if the removal jig 74 is not provided in advance, the male screw 73 may be previously screwed into the screw hole 43a in order to suppress the accumulation of foreign matter in the screw hole 43a.

Second Embodiment FIG. 8 is a sectional view of a sealing device 90 according to a second embodiment of the present invention. In the drawings from FIG. 8 onward, the same reference numerals are used to indicate the components common to the first embodiment, and those components will not be described in detail.

The sealing device 90 has an outer seal member 30 different from the outer seal member 30 of the first embodiment. Specifically, the outer sealing member 30 of the sealing device 90 has a rigid portion 92 different from the rigid portion 32 of the first embodiment. The rigid portion 92 is made of a rigid material, such as a metal, and has a cylindrical portion 93, an annular portion 38, a plurality of axially protruding portions 40, a plurality of inner extending portions 42, a flange 94, and a connecting portion. Has 97.

The cylindrical portion 93 corresponds to the cylindrical portion 36 of the first embodiment, but is composed of a single cylinder. The cylindrical portion 93 is fitted into the hole 8A of the outer ring 8 by interference fitting and is fixed to the inner surface of the hole 8A. The end portion 93a of the cylindrical portion 93 on the bearing inner side B is formed as a hook that spreads radially outward. A peripheral groove, that is, a recess 8B is formed in the hole 8A, and the end portion 93a of the cylindrical portion 93 is fitted into the recess 8B.

The flange 94 corresponds to the flange 43 of the first embodiment, but has a double structure in which two flange pieces 95 and 96 are laminated by bending. The flange piece 95 is integrally connected to the end of the cylindrical portion 93 on the atmosphere side A and extends outward from the cylindrical portion 93 in the radial direction. The flange 94 is integrally connected to the radially outer end of the flange piece 95 and extends substantially parallel to the flange piece 95. The flange pieces 95 and 96 extend in a plane perpendicular to the axial direction of the outer seal member 30.

A truncated cone-shaped connecting portion 97 is integrally connected to the radially inner end of the flange piece 96. The connecting portion 97 is further connected to the annular portion 38, and thereby connects the flange 94 and the annular portion 38. The annular portion 38 is arranged in substantially the same plane as the flange piece 95 of the flange 94.

In the flange 94, the flange piece 95 is formed with at least one through hole 95a, and the flange piece 96 is formed with at least one through hole 96a. The through holes 95a and 96a correspond to the screw hole 43a of the first embodiment, and the through hole 95a or 96a or both of the through holes 95a and 96a are screw holes into which the screw portion of the male screw 73 is screwed. The through holes 95a and 96a are arranged at positions overlapping any of the recesses 44 in the radial direction.

The removal operation of the sealing device 90 is the same as the removal operation of the sealing device 1 of the first embodiment, except that the through holes 95a and 96a are used instead of the screw holes 43a.

In this embodiment as well, the sealing device 90 can be used without the male screw 73 and the removing jig 74. However, by providing the male screw 73 and the removal jig 74 in advance in the sealing device 90, the removal work of the sealing device 90 can be completed quickly. Further, since the male screw 73 is screwed into the screw hole 43a, it is possible to prevent foreign matter from accumulating in the screw hole 43a. Even if the removal jig 74 is not provided in advance, the male screw 73 may be previously screwed into the screw hole 43a in order to suppress the accumulation of foreign matter in the screw hole 43a.

Third Embodiment FIG. 9 is a sectional view of a sealing device 100 according to a third embodiment of the present invention.

The sealing device 100 has an outer seal member 30 different from the outer seal member 30 of the first embodiment. Specifically, the outer sealing member 30 of the sealing device 100 has an outer ring 101 and an inner ring 102.

The outer ring 101 is a rigid portion formed of a rigid material, for example, a metal, and has a cylindrical portion 103 and a flange 104. The cylindrical portion 103 is a sleeve, which is fitted into the hole 8A of the outer ring 8 by interference fitting and is fixed to the inner surface of the hole 8A. The flange 104 is integrally connected to the end of the cylindrical portion 103 on the atmosphere side and radially extends from the cylindrical portion 103 to the outside.

At least one screw hole 104a is formed in the flange 104. The flange 104 corresponds to the flange 43 of the first embodiment, and the screw hole 104a corresponds to the screw hole 43a of the first embodiment.

The inner ring 102 has a double structure including a rigid portion 105 formed of a rigid material, for example, a metal, and an elastic portion 34 formed of an elastic material, for example, an elastomer. The rigid portion 105 reinforces the elastic portion 34.

The rigid portion 105 of the inner ring 102 has a cylindrical portion 107, an annular portion 38, a plurality of axially projecting portions 40, and a plurality of inner extending portions 42. The cylindrical portion 107 is a sleeve, which is fitted into the cylindrical portion 103 of the outer ring 101 by an interference fit and is fixed to the inner surface of the cylindrical portion 103 of the outer ring 101. The end portion 107a of the cylindrical portion 107 on the bearing inner side B is formed as a hook that spreads radially outward. The annular portion 38 is integrally connected to the end of the cylindrical portion 103 on the atmosphere side A and extends from the cylindrical portion 103 toward the inner side in the radial direction.

Therefore, although the cylindrical portion 103 of the outer ring 101 and the cylindrical portion 107 of the inner ring 102 are separate parts, they can be considered as a double cylindrical portion that is overlapped in the radial direction. Corresponds to portion 36.

The end 107a of the cylindrical portion 107, which is formed as a hook, serves to press the outer sealing member 30 into the hole 8A. That is, when the outer ring 101 is pushed into the hole 8A after the inner ring 102 is placed in the hole 8A, the cylindrical portion 103 of the outer ring 101 pushes the end portion 107a, so that the inner ring 102 moves in the axial direction of the rolling bearing 2. Can be placed at any desired position.

Similar to the first embodiment, a concave portion (guide portion) 44 extending inward in the radial direction is formed on the radially outer surface of each axial projecting portion 40. The screw hole 104a of the outer ring 101 is arranged at a position overlapping any of the recesses 44 in the radial direction. However, the number of recesses 44 may be one or more.

Although not shown in detail, in the work of removing the sealing device 100, the male screw 73 screwed into the threaded hole 104a of the flange 104 of the outer ring 101 is rotated so that the tip of the male screw 73 is rolled to the outer ring 8 of the bearing 2. The outer ring 101 is relatively separated from the end surface of the outer ring 8 by contacting the end surface of the outer ring 101. As a result, the restraining force of the hole 8A of the outer ring 8 on the cylindrical portion 103 and the cylindrical portion 107 of the outer seal member 30 is weakened, and the outer seal member 30 (the outer ring 101 and the inner ring 102) is easily pulled out from the hole 8A of the outer ring 8. Become.

Thereafter, by pulling the male screw 73 and/or the removal jig 74 fastened to the flange 104, the outer ring 101 is further pulled away from the outer ring 8, and the removal jig 74 fixed to the flange 104 is used along the axial direction. Pull the inner ring 102. As a result, the inner ring 102 can be moved in the axial direction together with the outer ring 101 of the outer seal member 30, and the outer seal member 30 can be extracted from the hole 8A of the outer ring 8 of the rolling bearing 2. Once the cylindrical portion 103 is partially separated from the inner surface of the hole 8A of the outer ring 8, the outer seal member 30 is moved from the hole 8A of the outer ring 8 of the rolling bearing 2 by utilizing the elastic deformation of the cylindrical portion 103 and the cylindrical portion 107. It is easy to pull out. As the outer seal member 30 (outer ring 101 and inner ring 102) is pulled out, the flange 24 is pushed by the cylindrical wall portion 60 of the inner ring 102, and the inner seal member 20 fixed to the inner ring 6 is also the outer seal member 30. Can be extracted with. In this way, the sealing device 1 can be easily removed. However, it is not essential to remove the outer seal member 30 and the inner seal member 20 at the same time, and the outer seal member 30 may be withdrawn from the outer ring 8 after the inner seal member 20 is withdrawn from the inner ring 6.

Also in this embodiment, the sealing device 100 can be used without the male screw 73 and the removing jig 74. However, by providing the male screw 73 and the removal jig 74 in advance in the sealing device 100, the removal work of the sealing device 100 can be completed quickly. Further, since the male screw 73 is screwed into the screw hole 43a, it is possible to prevent foreign matter from accumulating in the screw hole 43a. Even if the removal jig 74 is not provided in advance, the male screw 73 may be previously screwed into the screw hole 43a in order to suppress the accumulation of foreign matter in the screw hole 43a.

Other Modifications While the present invention has been illustrated and described above with reference to the preferred embodiments of the present invention, those skilled in the art can understand the form and details without departing from the scope of the invention described in the claims. It will be appreciated that modifications are possible. Such changes, alterations and modifications should fall within the scope of the present invention.

For example, the shape and number of lips of the closure are not limited to those described above.

The flanges 43, 94, 104 arranged outside the hole 8A have a circular outline, but they do not have to be circular.

In the above embodiment, the inner ring 6 that is the inner member is the rotating member, and the outer ring 8 that is the outer member is the stationary member. However, the present invention is not limited to the above embodiment, and can be applied to the sealing of a plurality of members that rotate relative to each other. For example, the inner member may be stationary and the outer member may rotate, or all of these members may rotate.

Aspects of the invention are also described in the numbered clauses below.

Clause 1. A sealing device which is disposed between an inner member and an outer member that rotate relative to each other in a rolling bearing and seals a gap between the inner member and the outer member,
An annular inner seal member fixed to the inner member,
An annular outer seal member fixed to the inner surface of the hole of the outer member, the inner seal member slidably contacting,
The inner seal member is
A sleeve fixed to the inner member,
And a flange that is integrally connected to an end of the sleeve on the atmosphere side and that extends radially outward from the sleeve,
The outer seal member,
A rigid part formed of a rigid material,
An elastic portion formed of an elastic material fixed to the rigid portion,
A seal lip that slidably contacts the sleeve of the inner seal member is formed in the elastic portion,
A dust lip that slidably contacts the flange of the inner seal member is formed in the elastic portion,
The rigid portion is
A cylindrical portion fitted into the hole of the outer member,
An annular portion arranged radially inside the cylindrical portion,
A plurality of axial projecting portions projecting in the axial direction of the outer seal member from the annular portion toward the atmosphere side,
Spreading radially outward from the cylindrical portion, having a flange facing the outer member,
The flange of the inner seal member is arranged on the atmosphere side with respect to the axially protruding portion,
The flange of the rigid portion of the outer seal member is formed with at least one screw hole penetrating the flange,
A sealing device, wherein the axially protruding portion or the inner seal member is provided with at least one guide portion for guiding the pulling of the outer seal member or the inner seal member by a removal jig.

Clause 2. The outer seal member has an outer ring and an inner ring,
The outer ring has the flange of the rigid portion,
The inner ring has the elastic portion, the annular portion of the rigid portion, the plurality of axially protruding portions, and the elastic portion,
The screw hole is formed in the flange of the outer ring,
The sealing device according to clause 1, wherein the guide portion is provided on the inner ring.

Clause 3. On the radially outer surface of at least one of the axially projecting portions of the plurality of axially projecting portions of the rigid portion of the outer seal member, a recess or a radial direction that extends radially inwardly is provided as the guide portion. 3. The sealing device according to clause 1 or 2, wherein a protrusion protruding outward is formed.

In this case, the axially projecting portion is pulled along the axial direction with a removal jig fixed to the flange of the outer seal member, so that the outer seal member, preferably together with the inner seal member, is an outer member of the rolling bearing. Can be pulled out from the hole. The rigid portion of the outer seal member has a plurality of axially projecting portions, and the rigid portion is reinforced in the axial direction of the outer seal member by the axial projecting portions, so that when the stiff portion is pulled along the axial direction, Parts are not easily damaged. Therefore, the sealing device can be easily removed.

Clause 4. A male screw screwed into the screw hole; and a plate that is the removal jig fixed to the flange of the rigid portion of the outer seal member with the male screw,
4. The sealing device according to Clause 3, wherein the plate is inserted into the recess or arranged on the inner side of the rolling bearing than the protrusion.

In this case, since the sealing device is provided with the plate serving as the removal jig, the removal operation of the sealing device can be completed quickly. Further, since the male screw is screwed into the screw hole, it is possible to prevent foreign matter from accumulating in the screw hole.

Clause 5. The sealing device according to clause 1 or 2, wherein the guide portion is provided on the inner seal member.

In this case, the removal jig fixed to the flange of the outer seal member pulls the inner seal member along the axial direction to pull the outer seal member together with the inner seal member out of the hole of the outer member of the rolling bearing. be able to.

Clause 6. A male screw screwed into the screw hole; and a plate that is the removal jig fixed to the flange of the rigid portion of the outer seal member with the male screw,
The sealing device according to clause 5, wherein the plate is arranged on the inner side of the rolling bearing with respect to the flange of the inner seal member.

In this case, since the sealing device is provided with the plate serving as the removal jig, the removal operation of the sealing device can be completed quickly. Further, since the male screw is screwed into the screw hole, it is possible to prevent foreign matter from accumulating in the screw hole.

Clause 7. The plurality of axially protruding portions have a shape in which a plurality of portions of the annular portion that are spaced apart at angular intervals in the circumferential direction are bent.
A plurality of locations in which the plurality of axially protruding portions of the annular portion are not formed are continuous with a plurality of inner extension portions that extend radially inward from the annular portion,
The sealing device according to any one of Clauses 1 to 6, wherein the elastic portion is fixed to the axially protruding portion and the inner extending portion.

In this case, not only is the rigid portion provided with a plurality of axial projecting portions, but also the rigid portion is provided with a plurality of inner extension portions that are spaced at angular intervals in the circumferential direction. The inner extension portion reinforces the elastic portion. Therefore, the strength of the elastic portion provided with the seal lip and the dust lip is increased.

Clause 8. The elastic portion includes a cylindrical cylindrical wall portion extending toward the flange of the inner seal member, and the plurality of axially protruding portions are embedded in the cylindrical wall portion, and the cylindrical wall portion and the flange. The sealing device according to any one of Clauses 1 to 7, wherein a gap is provided between the sealing device and the sealing device.

In this case, even if foreign matter from the outside tries to enter the sealing device, many foreign matter is repelled by the cylindrical wall portion of the outer seal member or the flange of the inner seal member. The foreign matter that has passed through the gap between the cylindrical wall portion and the flange reaches the dust lip. By setting this gap small, the amount of the foreign matter that reaches the dust lip can be reduced. Since the cylindrical wall portion is reinforced by the plurality of axially projecting portions embedded in the cylindrical wall portion, the cylindrical wall portion can withstand the force even if the force received from the foreign matter is strong.

Clause 9. The inner seal member further includes an outer sleeve extending in the axial direction of the inner seal member from the outer edge of the flange toward the inner side of the bearing,
The outer sleeve is disposed outside the tubular wall portion,
9. The sealing device according to clause 8, wherein a gap is provided between the cylindrical wall portion and the outer sleeve.

In this case, even if foreign matter from the outside tries to enter the sealing device, many foreign matter is repelled by the cylindrical wall portion of the outer seal member, the outer sleeve of the inner seal member, or the flange of the inner seal member. Foreign matter that has passed through the gap between the cylinder wall portion and the outer sleeve and the gap between the cylinder wall portion and the flange reaches the dust lip, but reaches the dust lip by setting these gaps small. The amount of foreign matter can be reduced.

Clause 10. The elastic portion of the outer seal member is provided radially inside the plurality of axially protruding portions, and includes an annular base portion supported by the rigid portion,
The dust lip includes a base end portion extending from the base portion toward the atmosphere side and the radial inner side, and a tip portion extending from the base end portion toward the atmosphere side and the radial outside,
10. The sealing device according to any one of clauses 1 to 9, wherein the tip portion slidably contacts the flange of the inner seal member.

In this case, the dust lip includes a base end portion extending radially inward and a tip portion extending radially outward, and the tip portion slidably contacts the flange of the inner seal member. Therefore, even if the shaft inserted into the rolling bearing or the inner member of the rolling bearing is eccentric or has a low circularity, the dust lip contacts the flange with a substantially uniform force over the entire circumference. .. In this way, the sealing performance of the dust lip is secured over the entire circumference. Further, since the tip portion of the dust lip exerts a force on the flange in the axial direction rather than the radial direction, it is possible to suppress an increase in the torque applied to the shaft.

Clause 11. The seal lip includes a base end portion extending from the base portion toward the atmosphere side and the radial inner side, and a tip portion extending from the base end portion toward the bearing inner side and the radial inner side,
11. The sealing device according to clause 10, wherein the tip portion of the seal lip slidably contacts an outer peripheral surface of the sleeve of the inner seal member.

In this case, the seal lip has a bent shape including a base end portion extending toward the atmosphere side and a tip end portion extending toward the bearing inner side, and the tip end portion is provided on the outer peripheral surface of the sleeve of the inner seal member. Contact slidably. Since the seal lip has a bent shape, the seal lip is easily deformed. Therefore, even if the shaft inserted into the rolling bearing or the inner member of the rolling bearing is eccentric or has a low roundness, the seal lip contacts the flange with a substantially uniform force over the entire circumference. .. In this way, the sealing performance of the seal lip is secured over the entire circumference.

1 Sealing device 2 Rolling bearing 4 Axle 6 Inner ring (inner member)
8 Outer ring (outer member)
8A hole 10 roller 20 inner seal member 30 outer seal member 22 sleeve 24 flange 26 outer sleeve 32 rigid portion 34 elastic portion 36 cylindrical portion 38 annular portion 40 axially protruding portion 42 inner extended portion 43 flange 43a screw hole 44 recess (guide Part)
50 base portion 52 seal lip 52a base end portion 52b tip portion 54 dust lip 54a base end portion 54b tip portion 73 male screw 74 removal jig 80 sealing device 82 projection (guide portion)
84 sealing device 90 sealing device 92 rigid part 93 cylindrical part 94 flange 95, 96 flange piece 100 sealing device 101 outer ring 102 inner ring 103 cylindrical part 104 flange 104a screw hole 105 rigid part 107 cylindrical part

Claims (6)

A sealing device which is disposed between an inner member and an outer member that rotate relative to each other in a rolling bearing and seals a gap between the inner member and the outer member,
An annular inner seal member fixed to the inner member,
An annular outer seal member fixed to the inner surface of the hole of the outer member, the inner seal member slidably contacting,
The inner seal member is
A sleeve fixed to the inner member,
And a flange that is integrally connected to an end of the sleeve on the atmosphere side and that extends radially outward from the sleeve,
The outer seal member,
A rigid part formed of a rigid material,
An elastic portion formed of an elastic material fixed to the rigid portion,
A seal lip that slidably contacts the sleeve of the inner seal member is formed in the elastic portion,
A dust lip that slidably contacts the flange of the inner seal member is formed in the elastic portion,
The rigid portion is
A cylindrical portion fitted into the hole of the outer member,
An annular portion arranged radially inside the cylindrical portion,
A plurality of axial projecting portions projecting in the axial direction of the outer seal member from the annular portion toward the atmosphere side,
Spreading radially outward from the cylindrical portion, having a flange facing the outer member,
The flange of the inner seal member is arranged on the atmosphere side with respect to the axially protruding portion,
The flange of the rigid portion of the outer seal member is formed with at least one screw hole penetrating the flange,
A sealing device, wherein the axially protruding portion or the inner seal member is provided with at least one guide portion for guiding the pulling of the outer seal member or the inner seal member by a removal jig. The outer seal member has an outer ring and an inner ring,
The outer ring has the flange of the rigid portion,
The inner ring has the elastic portion, the annular portion of the rigid portion, the plurality of axially protruding portions, and the elastic portion,
The screw hole is formed in the flange of the outer ring,
The sealing device according to claim 1, wherein the guide portion is provided on the inner ring. On the radially outer surface of at least one of the axially projecting portions of the plurality of axially projecting portions of the rigid portion of the outer seal member, a recess or a radial direction that extends radially inwardly is provided as the guide portion. The sealing device according to claim 1 or 2, wherein a protrusion protruding outward is formed. A male screw screwed into the screw hole; and a plate that is the removal jig fixed to the flange of the rigid portion of the outer seal member with the male screw,
The sealing device according to claim 3, wherein the plate is inserted into the concave portion or disposed on the inner side of the rolling bearing than the protrusion. The said guide part is provided in the said inner side sealing member, The sealing device of Claim 1 or 2 characterized by the above-mentioned. A male screw screwed into the screw hole; and a plate that is the removal jig fixed to the flange of the rigid portion of the outer seal member with the male screw,
The said plate is arrange|positioned rather than the said flange of the said inner side sealing member inside the said rolling bearing, The sealing device of Claim 5 characterized by the above-mentioned.

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