JP2016133196A - Sealing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing device which maintains good sealability, is easily removed during replacement work, and achieves good sealability after the replacement work.SOLUTION: A sealing device 1 comprises: an outer ring 10 attached to a hub 55; and a sealing device body 20 disposed between the hub 55 and a spindle 56 and configured to engage with the outer ring 10. The outer ring 10 has: a tubular part 11 coaxially arranged with the hub 55; and an inward-looking flange part 12 provided at one end of the tubular part 11. The sealing device body 20 comprises: a reinforcement ring 21; and an elastic body part 22 held by the reinforcement ring 21. The reinforcement ring 21 has: a cylindrical part 21a which is coaxially arranged with the hub 55 and fits in the tubular part 11 through an outer periphery cover 28; and a disc part 21b provided at one end of the cylindrical part 21a. The outer ring 10 has engagement parts 13 which protrude from the tubular part 11 to the radial inner side and engage with the other end 21a'' of the cylindrical part 21a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sealing device used for a bearing, and more particularly to a sealing device used for a hub bearing of an automobile such as a truck.

  In a vehicle, a sealing device is attached to a hub bearing (wheel bearing device) that rotatably supports a wheel in order to seal the inside of the hub bearing from the outside. FIG. 4 is a partial cross-sectional view showing a schematic configuration of a sealing device attached to a conventional hub bearing. As shown in FIG. 4, the conventional sealing device 100 seals an annular space 203 between an outer ring (outer race) 201 and an inner ring (inner race) 202 that are relatively rotated coaxially with each other in the hub bearing 200. Further, it is attached between the outer ring 201 and the inner ring 202. Specifically, in the sealing device 100, the reinforcing ring 101 is fixed in a liquid-tight manner on the inner peripheral surface of the outer ring 201, and the seal lip 102 is in liquid-tight contact with the inner ring 202.

  In the hub bearing 200, a plurality of rolling elements (taper rollers) 205 are annularly arranged between the outer ring 201 and the inner ring 202, and the rolling elements 205 are held by a retainer (not shown). The space 203 is filled with grease for lubricating the rolling elements 205. The sealing device 100 seals the space 203 from the outside, thereby preventing leakage of hydraulic oil from the outside into the space 203 and suppressing leakage of grease (for example, Patent Document 1). reference).

  As a sealing device attached to the truck, for example, there is an oil seal incorporated in a unit bearing as shown in FIG. The unit bearing 403 is a device that rotatably supports a hub 402 for attaching a wheel (not shown) to an end portion of the axle 401. The end portion of the axle 401 is on the outer side in the vehicle width direction (external A side in FIG. 5). An inner race 405 fitted around the shaft portion 404 projecting toward the outer periphery, a rolling element 406 movably disposed on the outer periphery of the inner race, and a rolling element embracing the rolling element. An outer race 407 that is externally fitted to the outer periphery of the inner race 405 so as to be held, and an oil seal 408 and a dust seal 409 that enclose the gap between the outer race and the inner race 405 on both sides in the vehicle width direction to contain grease. These members are assembled to form one unit (for example, see Patent Document 2).

  Further, as shown in FIG. 6, in another unit bearing having the same configuration as described above, the inner circumference of the hub 402 is inserted into the space between the unit bearing 403 and the flange portion 413a of the drive shaft 413 in the hub 402. Some of them are provided with a lubricant holding wall 416 having a wall surface that fits over the entire circumference and extends radially inward. In this configuration, oil 417 is filled in advance between the lubricant holding wall 416 and the unit bearing 403, and the oil 417 is always supplied to the sliding surface of the oil seal 408 on the outer side in the vehicle width direction of the unit bearing 403. Therefore, it is possible to reduce the wear of the oil seal 408 regardless of the running posture or vibration of the vehicle.

  As a conventional sealing device, there is a seal used for a hub bearing as shown in FIG. The hub bearing 600 is integrally formed with a wheel mounting flange 602b for mounting a wheel (not shown) at an end on the outer side, and is formed with tapered double-row outer rolling surfaces 602a and 602a formed on the inner periphery. The outer member 602, a pair of inner races 603,603 having a tapered inner raceway 603a opposite to the outer raceways 602a, 602a of the double row on the outer periphery, and the two raceways are accommodated between the raceways. A back surface provided with double-row rolling elements 604 and 604 and a cage 605 that holds these rolling elements so as to roll freely, and is arranged in a state in which the end surfaces on the small diameter side of the pair of inner rings 603 and 603 are abutted. A double row tapered roller bearing of a combined type is constructed. Seals 501 and 502 are attached to an opening of an annular space formed between the outer member 602 and the inner ring 603. These seals 501 and 502 prevent leakage of the lubricating grease sealed inside the bearing to the outside, and prevent foreign matters such as rainwater and dust from entering the bearing from the outside (for example, Patent Documents). 4).

Japanese Patent Laid-Open No. 10-058906 JP 2014-114820 A JP 2012-040971 A JP 2009-216230 A

  In the conventional sealing device described above, when replacing a part that is carried out during a periodic inspection, a part of the sealing device is deformed by applying a tool to a part of the sealing device and applying an impact with a hammer or the like through the tool. The inserted state is released, and then the sealing device is pulled out. However, when removing the sealing device by such a method, there is a possibility of scratching the inner peripheral surface of the outer peripheral side member such as a hub that comes into contact with the sealing ring, particularly a hub that contacts the reinforcing ring. And if a damage | wound is formed in an outer peripheral side member, when a new sealing device is attached, there exists a problem that favorable sealing performance cannot be obtained between a sealing device and a fitting part.

  In particular, since trucks and other lorries used for transporting cargo may be operated under heavy loads such as transporting heavy objects for a long time, sealing devices used for hub bearings are regularly installed. Have been replaced. In this case, if the method as described above is applied, there is a possibility that the fitting portion between the sealing device and the hub is likely to be damaged, and it becomes impossible to obtain a good sealing performance after the sealing device is replaced. . Further, when the replacement work is performed so that the fitting portion is not damaged, careful removal is required every time the replacement work is performed periodically, and the work is complicated.

  An object of the present invention is to provide a sealing device that can be easily removed at the time of replacement work while maintaining good sealing performance, and that can realize good sealing performance even after replacement work. .

  In order to achieve the above object, a sealing device of the present invention is a sealing device that seals between an outer peripheral side member and an inner peripheral side member that are coaxially arranged so as to be relatively rotatable, and is attached to the outer peripheral side member. And an outer ring that is disposed between the outer ring and the inner peripheral member, and that is engaged with the outer ring, and the outer ring is disposed coaxially with the outer peripheral member. A cylindrical portion having a tubular portion and a flange portion provided at one end of the tubular portion, wherein the sealing device main body is disposed coaxially with the outer peripheral side member and contacts the tubular portion; and the first cylindrical portion And a resilient ring having a disk portion provided on the inner circumferential side member and a sealing lip that contacts the inner circumferential side member and seals an object to be sealed, and is held by the reinforcing ring. And

  The outer ring has a plurality of locking portions that protrude radially inward from the tubular portion and lock the other end of the cylindrical portion.

  Moreover, it is preferable that the tubular portion has a plurality of folding margins at a part thereof, and the plurality of locking portions are formed by bending the plurality of folding margins radially inward.

  Furthermore, it is preferable that the plurality of locking portions are arranged at rotationally symmetric positions along the circumferential direction of the outer ring.

  Further preferably, the elastic body portion has an annular outer peripheral cover formed on the outer peripheral surface of the cylindrical portion, and the outer peripheral cover is fitted to the tubular portion of the reinforcing ring.

  According to the present invention, the sealing device main body and the outer ring cooperate to seal the lubricating composition such as grease filled in the annular space between the outer peripheral side member and the inner peripheral side member. In addition, foreign matter can be prevented from entering the annular space from the outside, and good sealing performance can be realized. Further, when removing the sealing device main body, the tool can be taken out by inserting a tool or the like between the tubular portion of the outer ring and the cylindrical portion of the sealing device main body. Contact can be prevented as much as possible, and formation of scratches on the inner peripheral surface of the outer peripheral member can be prevented. Therefore, the replacement work can be easily performed without worrying about the formation of scratches at the fitting portion, and a good seal is provided between the sealing device and the fitting portion when a new sealing device is attached. It becomes possible to obtain sex.

  Further, the outer ring is provided with a plurality of locking portions protruding radially inward from the tubular portion, and the plurality of locking portions lock the other end of the cylindrical portion of the sealing device body. The sealing device body can be fixed to the sealing device body, and unintentional dropping of the sealing device body can be prevented.

It is sectional drawing which shows schematically the structure of the sealing device which concerns on embodiment of this invention. It is sectional drawing which shows the structure of the outer ring in the sealing device of FIG. It is a figure explaining the process at the time of attaching the sealing device of FIG. 1 to a hub bearing, (a) is the state immediately after attachment, (b) shows the state by which the sealing device main body was latched by the outer ring. It is sectional drawing which shows an example of the conventional sealing device attached to the hub bearing of a vehicle. It is sectional drawing which shows an example of the other conventional sealing device attached to the hub bearing of a track | truck. It is sectional drawing which shows an example of the other conventional sealing device attached to the hub bearing of a track | truck. It is sectional drawing which shows an example of the other conventional sealing device attached to the hub bearing of a vehicle.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The sealing device of the present invention is used for bearings, in particular, hub bearings of automobiles, and is mounted for the purpose of sealing hydraulic oil or the like (hereinafter referred to as a sealing target) filled in the hub. In the present embodiment, a roller bearing mainly used for a truck or the like will be described as an example.

  The hub bearing to which the sealing device of this embodiment is attached includes an inner bearing disposed on the drive side (external A side in FIG. 1) with respect to the axial direction of the wheel shaft (drive shaft or the like), and the wheel side (sealing object in FIG. 1). (B side) and an outer bearing. The sealing device of this embodiment is attached near the inner side of the inner bearing, for example.

  As shown in FIGS. 1 and 3, the sealing device 1 includes a hub 55 (outer peripheral member) for sealing an annular space 54 in which an outer ring 51 and an inner ring 52 that are coaxially and relatively rotated via a roller 53 are arranged. ) And the spindle 56 (inner peripheral side member). The sealing device 1 includes an outer ring 10 attached to the hub 55, and a sealing device body 20 that is disposed between the hub 55 and the spindle 56 and engages with the outer ring 10.

  The outer ring 10 includes a tubular portion 11 that is arranged coaxially with the hub 55 and abuts against the hub 55, and an inward flange portion 12 provided at one end of the tubular portion 11. The outer ring 10 has a substantially L-shaped cross section in the axial direction, and is made of a metal such as stainless steel. The outer peripheral surface 11 a of the tubular portion 11 is disposed so as to contact the inner peripheral surface 55 a of the hub 55. Details of the configuration of the tubular portion 11 will be described later.

  The sealing device body 20 includes a reinforcing ring 21 and an elastic body portion 22 held by the reinforcing ring. The reinforcing ring 21 includes a cylindrical portion 21a that is arranged coaxially with the hub 55 and fits with the tubular portion 11, and a disk portion 21b provided at one end of the cylindrical portion 21a. The elastic body portion 22 is a member that is cross-linked (vulcanized) and bonded to the reinforcing ring 21 and has a seal lip 23 that abuts against the spindle 56 and seals the object to be sealed.

  The reinforcing ring 21 has a substantially L-shaped cross section in the axial direction, and is made of, for example, stainless steel or SPCC (cold rolled steel).

  In this embodiment, the elastic body portion 22 is integrally formed so as to cover the entire reinforcing ring 21 and is made of an elastomer. The elastomer is a polymer having rubber-like elasticity, and examples thereof include synthetic rubbers such as nitrile rubber (NBR), hydrogenated nitrile rubber (H-NBR), acrylic rubber (ACM), and fluorine rubber (FKM).

  Specifically, the elastic body portion 22 includes a lip waist portion 25 provided in the vicinity of the radially inner end portion of the disk portion 21b, and a dust lip 26 extending from the lip waist portion toward the radially inner side. Yes. The above-described seal lip 23 is formed integrally with the lip waist portion 25, extends in the axial direction from the lip waist portion 25, and is disposed to face the cylindrical portion 21a.

  The seal lip 23 is provided with a corner portion 23 a having a substantially V-shaped axial cross section on the inner peripheral side thereof, and is slidably pressed against the outer peripheral surface 56 a of the spindle 56. A garter spring 24 that urges the seal lip 23 radially inward is fitted to the outer peripheral side of the seal lip 23.

  The dust lip 26 is a tongue-like portion disposed closer to the sealing object B than the disk portion 21b, and extends inward (in the direction toward the axis of the spindle 56) and toward the sealing object B. The dust strip 26 removes foreign matters such as dust and muddy water adhering to the outer surface 56 a of the spindle 56, and can prevent foreign matters from reaching the seal lip 23.

  In the present embodiment, the elastic body portion 22 has an annular outer peripheral cover 28 formed on the outer peripheral surface 21 a ′ of the cylindrical portion 21 a, and the outer peripheral surface 28 a of the outer peripheral cover is tubular in the outer ring 10. The portion 11 is in pressure contact with the inner peripheral surface 11b. The fitting allowance in the circumferential direction of the outer peripheral cover 28 and the tubular portion 11 is a work for removing the sealing device main body 20 without causing a gap between the outer peripheral surface 28a of the outer peripheral cover and the inner peripheral surface 11b of the tubular portion 11. It is set within a range that does not affect sex.

  Further, the elastic body portion 22 further includes a side lip 27 extending from the lip waist portion 25 toward the inward flange portion 12 of the outer ring 10. The side lip 27 is a tongue-like portion disposed on the sealing target B side of the disk portion 21 b and is in contact with the inner side surface 12 a of the inward flange portion 12. The side lip 27 can prevent the sealing target from leaking from the sealing target B side between the sealing device body 20 and the outer ring 10, particularly between the outer peripheral cover 28 and the tubular portion 11. In particular, the fitting allowance between the outer peripheral cover 28 and the tubular portion 11 is set to be small so as not to affect the sealing performance from the viewpoint of easy attachment / detachment of the sealing device body 20. Thus, good sealing performance can be realized with certainty.

  In the present invention, the outer ring 10 has a plurality of locking portions 13 that protrude radially inward from the tubular portion 11 and lock the other end 21a ″ of the cylindrical portion 21a. 2 is preferably provided integrally with the tubular portion 11. However, the tubular portion 11 may be provided separately from the other end of the tubular portion 11. In the present embodiment, for example, as shown in FIGS. A pair of cut portions 14 and 14 are formed along the axial direction on 11c, and a folding allowance 13 'is provided, and the folding portion 13' is bent inward in the radial direction, whereby the locking portion 13 becomes a tubular portion. 11 is preferably formed so as to surround the other end 21a ″ of the cylindrical portion 21a. However, the shape of the locking portion 13 is not limited to this, and may be other shapes such as a substantially L-shaped cross section as long as the other end 21a ″ of the cylindrical portion 21a can be locked.

  The plurality of locking portions 13 are rotationally symmetric (0 <α <360) at a predetermined angle along the circumferential direction of the outer ring 10 with respect to the central axis X of the outer ring 10 in plan view (FIG. 2B). °). The number of the plurality of locking portions 13 is not particularly limited, but is preferably an even number such as 2, 4, or 6. In the present embodiment, six locking portions 13 are provided, and are arranged at positions that are rotationally symmetric six times. Thereby, even if it is a case where the sealing device main body 20 receives a pressure from the sealing object B side, the sealing device main body 20 can be reliably latched, and omission of the sealing device main body 20 is prevented. Further, the center axis of the sealing device main body 20 can be suppressed from causing an axial runout with respect to the central axis X of the outer ring 10 or the central axis of the spindle 56, and when the sealing device main body 20 is taken out, The outer ring 10 and the sealing device body 20 can be easily separated.

  In the sealing device 1 configured as described above, the outer peripheral surface 11 a of the tubular portion 11 is in pressure contact with the inner peripheral surface 55 a of the hub 55 in the outer ring 10. Further, the sealing device body 20 is locked to the outer ring 10 by a plurality of locking portions 13. In the sealing device main body 20, the outer peripheral surface 28 a of the outer peripheral cover 28 formed on the outer peripheral surface 21 a of the reinforcing ring 21 is in pressure contact with the inner peripheral surface 11 b of the tubular portion 11, and the seal lip 23 is the garter spring 24. It comes into sliding contact with the spindle 56 by elastic force. Thereby, it is possible to seal a sealing target such as grease filled in the annular space 54 and to prevent foreign matter from entering the annular space 54 from the outside.

  The replacement operation of the sealing device 1 can be performed by the following procedure. First, the sealing device body 20 is coaxially arranged inside the outer ring 10 to form the sealing device 1, and is composed of an outer ring 51, an inner ring 52, and a roller 53 as shown in FIG. It inserts in the annular space 54 where a bearing is arrange | positioned, and pushes the outer ring 10 to a predetermined position. At this time, the central axes of the hub 55, the sealing device 1, and the spindle 56 are substantially the same. The sealing device body 20 is supported at a position where the side lip contacts the flange portion 12 of the outer ring 10. Next, as shown in FIG. 3B, using a long tool T such as a screwdriver, a plurality of pre-formed folding margins 13 ′ are bent radially inward to be plastically deformed (FIG. 3B). )). Thereby, a plurality of locking portions 13 are formed in the tubular portion 11 of the outer ring 10, and the reinforcing ring 21 is fixed to the outer ring 10 by the plurality of locking portions 13. By this step, the sealing device body 20 is fixed to the outer ring 10 and the mounting of the sealing device 1 is completed.

  When the sealing device 1 is removed, the locking portion 13 is plastically deformed so as to extend linearly using the tool T, and the fixing of the reinforcing ring 21 to the outer ring 10 is released. Then, the outer ring 10 is left in the annular space 54, the sealing device body 20 is separated from the outer ring 10, and only the sealing device body 20 is pulled out. Thereafter, the new sealing device body 20 is inserted into the annular space 54, and the new sealing device body 20 is disposed at the same position as the sealing device body 20 before replacement. In the same manner as described above, the plurality of folding allowances 13 ′ are bent radially inward using the tool T to be plastically deformed, and the reinforcing ring 21 is fixed to the outer ring 10. When the folding allowance 13 'formed in the outer ring 10 is reusable, the outer ring 10 is reused without being replaced, and only the sealing device main body is replaced by the above procedure. On the other hand, when the folding allowance 13 'formed in the outer ring 10 cannot be reused, the sealing device body 20 is pulled out and the outer ring 10 is pulled out, and a new outer ring 10 and a sealing device body 20 are prepared. Then, a new sealing device 1 is mounted in the same procedure as described above.

  As described above, according to the present embodiment, the sealing device 1 includes two members, the outer ring 10 attached to the hub 55 and the sealing device body 20 that engages with the outer ring. The outer ring 10 is arranged between the spindles 56 on the radially outer side of the sealing device body 20. The tubular portion 11 of the outer ring 10 contacts the hub 55, and in the sealing device body 20, an outer peripheral cover 28 formed on the outer periphery of the reinforcing ring 21 is in pressure contact with the tubular portion 11 of the outer ring 10, and an elastic body. The seal lip 23 of the portion 22 is in sliding contact with the spindle 56. Thereby, the sealing device main body 20 and the outer ring 10 cooperate to seal the object to be sealed filled in the annular space 54 between the hub 55 and the spindle 56, and the foreign matter is annularly formed from the outside. Intrusion into the space 43 can be prevented, and good sealing performance can be realized. Further, when removing the sealing device body 20, the sealing device body 20 can be taken out by inserting the tool T between the tubular portion 11 of the outer ring 10 and the cylindrical portion 21a of the sealing device body 20, It is possible to prevent the tool T from coming into contact with the hub 55 as much as possible, and to prevent the inner peripheral surface 55a of the hub 55 from being damaged. Therefore, the replacement work can be easily performed without worrying about the formation of scratches on the hub 55, and when the new sealing device body 20 is attached, a good condition can be obtained between the sealing device 1 and the hub 55. It becomes possible to obtain a sealing property.

  Further, the outer ring 10 is provided with a plurality of locking portions 13 protruding radially inward from the tubular portion 11, and these plurality of locking portions 13 lock the other end 21a ′ of the cylindrical portion 21a. The sealing device main body 20 can be fixed to the outer ring 10, and the sealing device main body 20 can be prevented from dropping unintentionally. In particular, if a plurality of folding margins 13 are formed at the other end 11c of the tubular portion 11 and the plurality of locking portions 13 are formed by bending the plurality of folding margins radially inward, the plurality of locking portions 13 are formed. While being able to be easily provided in the outer ring 10, it is possible to prevent the sealing device body 20 from falling off with a simple structure.

  In particular, when the sealing device 1 is used for a hub bearing of a lorry, even when the sealing device 1 is periodically replaced, the possibility of damaging the fitting portion between the sealing device 1 and the hub 55 is remarkably increased. Thus, the sealing device 1 can be easily removed and good sealing performance can be realized even after the sealing device 1 is replaced.

  Although the sealing device according to the above embodiment has been described above, the present invention is not limited to the described embodiment, and various modifications and changes can be made based on the technical idea of the present invention.

  For example, in the above embodiment, the tapered roller bearing (roller bearing) has been described as an example. However, the present invention is not limited thereto, and the sealing device of the present invention is applied to other roller bearings such as a cylindrical roller bearing and a double row cylindrical roller bearing. May be applied. Further, the sealing device of the present invention may be applied to ball bearings such as deep groove ball bearings, magnet ball bearings, angular ball bearings, and double row angular ball bearings.

  Moreover, in the said embodiment, although the sealing device 1 is arrange | positioned in the annular space 54 between the hub 55 and the spindle 56, it is not restricted to this, The outer peripheral side member arrange | positioned coaxially and relatively rotatable And an annular space between the inner peripheral member and the inner peripheral member. For example, the sealing device may be disposed in an annular space between the outer ring and the inner ring. Further, the sealing device may be applied to a mechanism in which one of the outer peripheral member and the inner peripheral member is fixed and the other rotates, or a mechanism in which both the outer peripheral member and the inner peripheral member rotate.

  In addition, the outer ring 10 has a substantially L-shaped axial cross section, but is not limited thereto, and may have another shape such as a substantially U-shaped axial cross section. Further, the outer ring may have another configuration as long as it has a cylindrical portion disposed between the outer peripheral member and the sealing device main body.

  Further, in the sealing device main body 20, the elastic body portion 22 has an annular outer peripheral cover 28 formed on the outer peripheral surface 21a ′ of the cylindrical portion 21a. Alternatively, the outer peripheral cover 28 is provided as long as the specification allows the oil leakage at the interface to be suppressed by adjusting the fitting allowance between the tubular portion 11 of the outer ring 10 and the cylindrical portion 21a of the sealing device body 20. It does not have to be. In this case, the outer peripheral surface 21 a ′ of the cylindrical portion 21 a is in pressure contact with the inner peripheral surface 11 b of the tubular portion 11, and sealing performance can be realized by the pressure contact surface. In the present embodiment, the outer peripheral cover 28 that is in pressure contact with the tubular portion 11 is provided. The press-contact part which has may be provided.

  Moreover, in the said embodiment, although a pair of notch parts 14 and 14 are formed along the axial direction in the other end 11c of the tubular part 11, it is not restricted to this, According to the axial direction dimension of an outer ring, a tubular part You may form a notch in parts other than the edge part. In this case, the cut portion may have another shape such as a substantially U-shape.

  Moreover, in the said embodiment, although the latching | locking part 13 'is bend | folded and the latching | locking part 13 is formed, if not only this but the site | part which can latch the cylindrical part of the sealing device main body 20 can be provided, another part will be provided. The locking part may be formed by a method.

  In the above-described embodiment, the elastic body portion 22 includes the side lip 27 extending from the lip waist portion 25 toward the inward flange portion 12 of the outer ring 10, but is not limited thereto, and other shapes such as an elastomer protrusion are used. It may have a part.

  Moreover, in the said embodiment, although the garter spring 24 is fitted by the sealing device 1, it is not restricted to this but a garter spring does not need to be provided.

  The sealing device of the present invention is used for bearings of various vehicles such as cargo cars and passenger cars, or various industrial equipment such as rolling mills, and is particularly useful as a sealing device for truck hub bearings.

DESCRIPTION OF SYMBOLS 1 Sealing device 10 Outer ring 11 Tubular part 11a Outer peripheral surface 11b Inner peripheral surface 11c Other end 12 Inward flange part 13 Locking part 13 'Folding margins 14, 14 A pair of notch parts 20 Sealing device main body 21 Reinforcement ring 21a Cylindrical part 21a 'outer peripheral surface 21a "other end 21b disk part 22 elastic body part 23 seal lip 23a corner corner part 24 garter spring 25 lip waist part 26 dust lip 27 side lip 28 outer peripheral cover 28a outer peripheral surface 51 outer ring 52 inner ring 53 roller 54 annular space 55 Hub 55a Inner peripheral surface 56a Outer peripheral surface 56 Spindle

Claims (5)

A sealing device that seals between an outer peripheral side member and an inner peripheral side member that are coaxially arranged to be relatively rotatable,
An outer ring attached to the outer peripheral member;
A sealing device body disposed between the outer ring and the inner peripheral member and engaged with the outer ring;
The outer ring has a tubular portion arranged coaxially with the outer peripheral member, and a flange portion provided at one end of the tubular portion,
The sealing device body includes:
A reinforcing ring having a cylindrical portion disposed coaxially with the outer peripheral side member and in contact with the tubular portion, and a disk portion provided in the cylindrical portion;
A sealing device comprising: a sealing lip that abuts against the inner peripheral member and seals an object to be sealed; and an elastic body portion held by the reinforcing ring.   The sealing device according to claim 1, wherein the outer ring has a plurality of locking portions that protrude radially inward from the tubular portion and lock the other end of the cylindrical portion. The tubular portion has a plurality of folding margins in a part thereof,
The sealing device according to claim 2, wherein the plurality of locking portions are formed by bending the plurality of folding margins radially inward.   The sealing device according to claim 2, wherein the plurality of locking portions are rotationally symmetrical along the circumferential direction of the outer ring. The elastic body portion has an annular outer peripheral cover formed on the outer peripheral surface of the cylindrical portion,
The sealing device according to claim 1, wherein the outer peripheral cover is fitted with a tubular portion of the reinforcing ring.

Images