JP2016109190A - Sealing device - Google Patents

Abstract

An object of the present invention is to provide a sealing device capable of facilitating work for periodic replacement. A sealing device includes an annular sealing device main body, an annular fitting member that internally fits the sealing device main body at the outer periphery, and a fixing member that enables the sealing device to be detachably fixed to an outer ring. 4. The sealing device main body 2 includes a reinforcing ring 10 and an elastic body portion 20, and the fitting member 3 includes a fitting member main body 30 and a retaining member 31. The sealing device body 2 is fitted into the fitting member body 30, the retaining member 31 abuts on the outer surface 35 of the fitting member body 30, and the fixing member 4 penetrates the retaining member 31 and the fitting member body 30. The screw is screwed into the bolt hole of the outer ring and is held by the outer ring. The fitting member main body 30 and the retaining member 31 are fixed to the outer ring, and the sealing device 1 is fixed to the hub bearing. [Selection] Figure 1

Description

  The present invention relates to a sealing device, and more particularly to a sealing device used for a hub bearing of a vehicle or the like.

  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. 3 is a partial cross-sectional view showing a schematic configuration of a sealing device attached to a conventional hub bearing. As shown in FIG. 3, this type of conventional sealing device 100 includes an annular space 203 between an outer ring (outer race) 201 and an inner ring (inner race) 202 that are coaxially rotated relative to each other in a hub bearing 200. In order to seal, 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. The sealing device 100 abuts against a retaining member 204 provided on the outer ring 201 at an outer end portion, and is positioned in the axial direction.

  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). To 4).

  Vehicles, particularly trucks, are heavy, are used for transporting luggage, and are used in severe environments such as traveling in harsh environments, and the burden on the sealing device 100 is large. For this reason, in the truck hub bearing 200, it is difficult for the sealing device 100 to maintain necessary functions and performance over the period of use of the truck, and the sealing device 100 needs to be replaced periodically.

JP 2014-114820 A JP 2012-040971 A JP 2009-216230 A JP-A-10-58906

  However, when the conventional sealing device 100 is removed from the hub bearing 200, a tool is abutted against a part of the sealing device 100, for example, the reinforcing ring 101, and an impact is applied to the reinforcing ring 101 through the tool to thereby reinforce the reinforcing ring. It is necessary to deform 101 and weaken the fitting force between the reinforcing ring 101 and the outer ring 201. In the conventional removal operation of the sealing device 100, there is a possibility that the outer ring 201 may be damaged by a tool when an impact is applied to the reinforcing ring 101. Therefore, the outer ring 201 is not damaged during the removal operation. Care had to be taken and the work was inefficient. As described above, the conventional sealing device 100 complicates the regular replacement work and makes it inefficient.

  For this reason, there has been a need for a sealing device that can facilitate the work for periodic replacement.

  This invention is made | formed in view of the above-mentioned subject, The objective is to provide the sealing device which can make the operation | work for a periodic exchange easy.

  In order to achieve the above object, a sealing device according to the present invention includes an annular outer peripheral member that is rotatable relative to each other about an axis, and an annular inner peripheral member that is at least partially surrounded by the outer peripheral member. A sealing device for sealing between the outer peripheral side member and the inner peripheral side member in a bearing device comprising an annular reinforcing ring centering on the axis, and an elastic body attached to the reinforcing ring A sealing device main body provided with an annular elastic body portion centered on the formed axis, and an annular fitting member centered on the axis that fits the sealing device main body on an outer periphery of the sealing device main body. And a fixing member that detachably fixes the fitting member to the outer peripheral side member, and the elastic body portion includes a seal lip that slidably contacts the inner peripheral side member, and the fitting member Is said to the outer peripheral side member It can be engaged from the sealing target side in the line direction, and the fixing member can fix the fitting member to the outer circumferential side member in a state where the fitting member is engaged with the outer circumferential side member. It is characterized by doing.

  In the sealing device according to an aspect of the present invention, the fitting member includes at least one through hole extending in an axial direction and penetrating the fitting member, and the fixing member is inserted through the through hole and the outer periphery. The side member can be screwed together.

  The sealing device which concerns on 1 aspect of this invention WHEREIN: The said fitting member is provided with the engaging part engaged with the said outer peripheral side member, This engaging part positions the said engaging member with respect to the said outer peripheral side member. .

  The sealing device which concerns on 1 aspect of this invention is equipped with the cyclic | annular seal ring clamped between the said outer peripheral side members.

  In the sealing device according to one aspect of the present invention, the fitting member includes a stopper that contacts the sealing device main body from the sealing target side in the axial direction.

  According to the sealing device of the present invention, the fitting member that internally fits the sealing device main body can be detachably fixed to the outer peripheral side member by the fixing member in a state where the fitting member is engaged with the outer peripheral side member. For this reason, by removing the fixing member from the outer peripheral side member, the fitting member can be removed from the outer peripheral side member together with the sealing device body, and the replacement work can be facilitated.

  Thus, according to the sealing device according to the present invention, the work for periodic replacement can be facilitated.

It is a figure which shows schematic structure of the sealing device which concerns on embodiment of this invention, Fig.1 (a) is sectional drawing in the cross section along the axis line of a sealing device, FIG.1 (b) is FIG. It is an expanded sectional view of the sealing device shown to a). It is a fragmentary sectional view for showing the use condition of the sealing device shown in FIG. It is a fragmentary sectional view for showing a schematic structure of a sealing device attached to a conventional hub bearing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration of a sealing device according to an embodiment of the present invention. FIG. 1 (a) is a cross-sectional view in a section along the axis of the sealing device, and FIG. FIG. 2 is an enlarged cross-sectional view of the sealing device shown in FIG. A sealing device 1 according to an embodiment of the present invention seals an annular space between an outer ring and an inner ring that are two members that can rotate relative to each other about an axis x in a bearing device such as a hub bearing of a vehicle, for example. Is.

  Hereinafter, for convenience of explanation, the direction of the arrow a (see FIG. 1A) in the axis x direction is the outside, and the direction of the arrow b (see FIG. 1A) in the axis x direction is the inside. More specifically, the outer side is a direction (sealing target side) facing a region where a sealing target object (hydraulic oil) is present in use, and the inner side is a direction facing the inside of the bearing device. is there. Further, in a direction perpendicular to the axis x (hereinafter also referred to as “radial direction”), the direction away from the axis x (the direction of arrow c in FIG. 1A) is the outer peripheral side, and the direction approaches the axis x (FIG. 1). The direction of arrow d in FIG.

  As shown in FIGS. 1A and 1B, the sealing device 1 includes an annular sealing device main body 2 centered on the axis x, and an axis that fits the sealing device main body 2 on the outer periphery of the sealing device main body 2. An annular fitting member 3 centering on x, and a fixing member 4 that enables the sealing device 1 to be detachably fixed to the outer ring are provided. The sealing device main body 2 includes a reinforcing ring 10 and an elastic body portion 20, and the fitting member 3 includes a fitting member main body 30 and a retaining member 31.

  As shown in FIGS. 1A and 1B, the reinforcing ring 10 is an annular metal member centered on the axis x, and the elastic body portion 20 is an annular elastic body centered on the axis x. The elastic body portion 20 is integrally attached to the reinforcing ring 10. Examples of the metal material of the reinforcing ring 10 include stainless steel and SPCC (cold rolled steel). Examples of the elastic body of the elastic body portion 20 include various rubber materials. Examples of the various rubber materials include synthetic rubbers such as nitrile rubber (NBR), hydrogenated nitrile rubber (H-NBR), acrylic rubber (ACM), and fluorine rubber (FKM).

  The reinforcing ring 10 has a substantially L-shaped cross section (hereinafter also simply referred to as “cross section”) along the axis x, and includes a disk portion 11 and a cylindrical portion 12. The disk part 11 is a hollow disk-shaped part that extends in a direction perpendicular to the axis x, and the cylindrical part 12 is a cylindrical part that extends outward from the outer peripheral end of the disk part 11 in the axis x direction. As shown in FIGS. 1A and 1B, the cylindrical portion 12 has an outer end portion 12 a that is an outer end portion that is recessed toward the inner peripheral side, that is, the outer end portion 12 a is The diameter is smaller than other parts.

  The elastic body portion 20 is attached to the reinforcing ring 10, and in the present embodiment, the reinforcing ring 10 covers the outer and inner peripheral sides of the reinforcing ring 10 and the outer peripheral side of the outer end portion 12 a of the cylindrical portion 12. And is molded integrally. The elastic body portion 20 includes a lip waist portion 21, a seal lip 22, and a dust lip 23. As shown in FIGS. 1A and 1B, the lip waist portion 21 is a portion located in the vicinity of the inner circumferential end of the disk portion 11 of the reinforcing ring 10, and the seal lip 22 is a lip waist portion 21. It is a part extended toward the outside, and is disposed so as to face the cylindrical portion 12 of the reinforcing ring 10. The dust lip 23 extends from the lip waist 21 in the direction of the axis x.

  The seal lip 22 has a wedge-shaped annular lip front end portion 24 having a cross-sectional shape convex toward the inner peripheral side at the outer end portion. As will be described later, the lip distal end portion 24 is formed so as to be slidably in close contact with the outer peripheral surface of the inner ring inserted through the outer ring of the bearing device, and seals between the inner ring and the inner ring in use. It has become. A garter spring 25 that urges the seal lip 22 inward in the radial direction is fitted to the outer peripheral portion of the seal lip 22.

  The dust lip 23 is a tongue-like portion extending from the lip waist 21 and extends inward and on the inner peripheral side. The dust lip 23 prevents foreign matter from entering the lip tip 24 in the used state.

  The elastic body portion 20 includes a front cover 26 and an outer peripheral cover 27. The front cover 26 covers the outer surface of the disk portion 11 of the reinforcing ring 10 and the inner peripheral surface of the cylindrical portion 12, and the outer cover 27 is disposed on the outer peripheral side of the outer end portion 12 a of the cylindrical portion 12 of the reinforcing ring 10. Covers the surface.

  As will be described later, the outer peripheral cover 27 has a radial thickness w so as to have a predetermined fitting margin so that the sealing device body 2 is fitted and fixed to the inner circumference of the fitting member 3. Has been. In addition, the cylindrical portion 12 of the reinforcing ring 10 is also set with a diameter value of the outer peripheral surface 12b which is the outer peripheral surface so that the sealing device body 2 is fitted and fixed to the inner periphery of the fitting member 3. ing.

  The reinforcing ring 10 is manufactured by, for example, pressing or forging, and the elastic body portion 20 is formed by cross-linking (vulcanization) molding using a molding die. At the time of this cross-linking molding, the reinforcing ring 10 is disposed in the mold, the elastic body portion 20 is bonded to the reinforcing ring 10 by cross-linking (vulcanization) bonding, and the elastic body portion 20 is integrated with the reinforcing ring 10. Molded.

  In the fitting member 3, the fitting member main body 30 is a cylindrical member centered on the axis line x as shown in FIGS. 1A and 1B, and has a predetermined thickness in the radial direction. An inner peripheral surface 33 that is an inner peripheral surface, an outer peripheral surface 34 that is an outer peripheral surface, an outer surface 35 that is an outer surface, and an inner side surface 36 that is an inner surface. doing. The fitting member main body 30 is formed with one or a plurality of through holes 37 that extend in the direction of the axis x and penetrate the outer surface 35 and the inner surface 36. Further, in the fitting member main body 30, a part of the end portion on the inner surface 36 side of the outer peripheral surface 34 is cut out to form a cutout portion 38 that is a portion recessed in the inner peripheral direction. The cutout portion 38 is a cutout extending in the circumferential direction of the outer peripheral surface 34 over a part of the outer peripheral surface 34, and one or a plurality of the cutout portions 38 may be formed on the outer peripheral surface 34. Further, it may be an annular notch extending over the entire circumference in the circumferential direction on the outer circumferential surface 34. The notch 38 is an engaging part and engages with the outer ring to position the sealing device 1 with respect to the outer ring, as will be described later.

  In the fitting member 3, as shown in FIGS. 1A and 1B, the retaining member 31 is a hollow disk-shaped member having a predetermined thickness in the direction of the axis x, and is an inner peripheral surface. It has an inner peripheral surface 39, an outer peripheral surface 40 that is an outer peripheral surface, an outer surface 41 that is an outer surface, and an inner surface 42 that is an inner surface. In addition, the stopper 31 is formed with a through hole 43 that extends in the direction of the axis x and penetrates the outer surface 41 and the inner surface 42 corresponding to the through hole 37 of the fitting member main body 30. The outer peripheral surface 40 of the retaining member 31 has the same diameter as the outer peripheral surface 34 of the fitting member main body 30 and is flush with each other. Further, the inner side surface 42 of the retainer 31 is formed so as to be in close contact with the outer side surface 35 of the fitting member main body 30. In a state where the inner side surface 42 of the retaining member 31 is in close contact with the outer surface 35 of the fitting member main body 30 and the outer peripheral surface 40 of the retaining member 31 is flush with the outer peripheral surface 34 of the fitting member main body 30. The through hole 43 is connected to the through hole 37 of the fitting member main body 30 so as to be flush with or overlap with each other. The diameter of the inner peripheral surface 39 of the retaining member 31 is smaller than the diameter of the inner peripheral surface 33 of the fitting member main body 30, and the inner side surface 42 is an outer surface between the retaining member 31 and the fitting member main body 30. When the outer peripheral surface 40 and the outer peripheral surface 34 are flush with each other, the protruding portion 32 that is the end portion on the inner peripheral side of the stopper 31 protrudes from the fitting member body 30 toward the inner peripheral side. ing.

  The fixing member 4 is a member that can be engaged with the outer ring. The fixing member 4 is inserted into the through hole 37 of the fitting member main body 30 and the through hole 43 of the retaining member 31, and is engaged with and held by the outer ring. It is a member that can be fixed to the outer ring. In the sealing device 1 according to the present embodiment, the fixing member 4 is a member that can be screwed into the outer ring, for example, a bolt. The sealing device 1 has one or a plurality of fixing members 4, and the number of the fixing members 4 corresponds to the number of the through holes 37 of the fitting member main body 30 and the through holes 43 of the retaining member 31. The fixing member 4 is not limited to a bolt, but may be any member that can be engaged with and held by the outer ring.

  The sealing device 1 has the above-described configuration, and in a use state, the sealing device main body 2 is fitted into the fitting member main body 30, and the outer peripheral surface 12 b of the cylindrical portion 12 of the reinforcing ring 10 and the outer periphery of the elastic body portion 20. The outer peripheral surface 27 a of the cover 27 is in liquid-tight contact with the inner peripheral surface 33 of the fitting member main body 30. In use, the retainer 31 is positioned so that the inner surface 42 abuts the outer surface 35 of the fitting member main body 30 and the outer peripheral surface 40 is flush with the outer peripheral surface 34 of the fitting member main body 30. The sealing device main body 2 is positioned in the fitting member main body 30 at a position in the axis x direction so as to come into contact with the inner side surface 42 of the retaining member 31 at the protruding portion 32.

  As will be described later, the sealing device 1 includes an annular seal ring 44. Examples of the annular seal ring 44 include gaskets (static seals) such as O-rings, D-rings, and rectangular rings. The annular seal ring 44 is sandwiched between the outer ring and the fitting member main body 30 to seal between the outer ring and the fitting member 3.

  Next, the usage state of the sealing device 1 having the above-described configuration will be described. FIG. 2 is a partial cross-sectional view for illustrating a usage state of the sealing device 1. In the present embodiment, the sealing device 1 is used for a hub bearing of a truck as a bearing device.

  As shown in FIG. 2, the sealing device 1 is attached to the hub bearing 50 for a truck so that hydraulic fluid does not enter the inside of the hub bearing 50 from the outside.

  The hub bearing 50 is a conventionally known hub bearing, and includes an outer ring 51 as an annular outer peripheral member and an inner ring 52 as an annular inner peripheral member, which are coaxially rotatable relative to each other about the axis x. . The inner ring 52 is at least partially surrounded by the outer ring 51 with an annular space 53. Further, a plurality of rolling elements 54 are annularly arranged between the outer ring 51 and the inner ring 52, and the rolling elements 54 are held by a cage (not shown). The rolling element 54 is a conical tapered roller. The hub bearing 50 may have a plurality of rows of rolling elements 54 arranged in an annular shape. The space 53 is filled with grease for lubricating the rolling elements 54.

  The sealing device 1 is attached to the hub bearing 50 at the outer end so as to seal between the outer ring 51 and the inner ring 52 and seals the space 53 from the outside. Here, the outside is a portion covered with hydraulic oil (sealing target), and the inside is a portion in the space 53 sealed by the sealing device 1. Further, as in FIG. 1, the outer side is the direction of the arrow a in the direction of the axis x, and the inner side is the direction of the arrow b in the axis x.

  Specifically, as described above, the sealing device main body 2 is press-fitted and fitted into the fitting member main body 30, and the outer peripheral surface 12 b of the cylindrical portion 12 of the reinforcing ring 10 and the outer peripheral cover of the elastic body portion 20. 27 is in liquid-tight contact with the inner peripheral surface 33 of the fitting member main body 30. In this manner, the space between the sealing device main body 2 and the fitting member main body 30 is sealed. The stopper 31 is disposed such that the inner surface 42 abuts on the outer surface 35 of the fitting member main body 30 and the outer peripheral surface 40 is flush with the outer peripheral surface 34 of the fitting member main body 30. Is in contact with the outer end portion of the elastic body portion 20.

  In a state where the sealing device main body 2 is fitted in the fitting member main body 30, the fitting portion main body 30 is engaged with an outer end face 51 a that is an outer end face of the outer ring 51 on the inner side face 36. Specifically, the outer end surface 51 a of the outer ring 51 has a shape corresponding to the inner surface 36 of the fitting portion main body 30, and the outer end surface 51 a has a notch that is an engaging portion of the fitting member main body 30. Corresponding to the portion 38, a convex portion 51b as an engaging portion is formed. The convex part 51b can be accommodated in the notch part 38, and the notch part 38 and the convex part 51b can be engaged with each other and can be locked. A bolt hole 55 is formed in the outer end surface 51 a of the outer ring 51 as a holding part for detachably holding the fixing member 4, and the convex part 51 b of the outer ring 51 is formed in the notch part 38 of the fitting member main body 30. When accommodated, the bolt hole 55 is disposed on the outer end surface 51 a so as to overlap the through hole 37 of the fitting member main body 30. That is, the notch portion 38 of the fitting member main body 30 and the convex portion 51 b of the outer ring 51 function as a guide for positioning between the sealing device 1 and the hub bearing 50.

  In use, an annular seal ring 44 is sandwiched between the inner side surface 36 of the fitting member main body 30 and the outer end surface 51a of the outer ring 51 to seal between the inner side surface 36 and the outer end surface 51a. . Specifically, the annular seal ring 44 is mounted in an annular groove (not shown) formed on the outer end surface 51 a of the outer ring 51. The annular seal ring 44 is sandwiched between the inner side surface 36 of the fitting member main body 30 and the outer end surface 51a of the outer ring 51, so that the space between the outer ring 51 and the fitting member main body 30 is more effective. Can be sealed. Instead of the annular seal ring 44, another sealing means may be used between the inner side surface 36 of the fitting member main body 30 and the outer end surface 51 a of the outer ring 51, and there is no sealing means, The inner side surface 36 and the outer end surface 51a may be in direct close contact with each other.

  Further, the seal lip 22 faces an inner peripheral surface 52 a which is an inner peripheral surface of the inner ring 52, and the lip tip portion 24 of the seal lip 22 is liquid-tight so as to be slidable on the inner peripheral surface 52 a of the inner ring 52. It is in contact. Thus, the seal lip 22 seals between the sealing device 1 and the inner ring 52.

  Further, the bolt as the fixing member 4 passes through the through hole 43 of the retaining member 31 and the through hole 37 of the fitting member main body 30, is screwed into the bolt hole 55 of the outer ring 51, and is held by the outer ring 51. Thereby, the fitting member main body 30 and the retaining member 31 are fixed to the outer ring 51, and the sealing device 1 is fixed to the hub bearing 50. As described above, the outer end portion of the elastic body portion 20 is in contact with the inner side surface 42 of the retaining member 31 at the protruding portion 32, whereby the sealing device body 2 on the outer side in the axis x direction at the hub bearing 50. Is positioned.

  As described above, in the state of use, the sealing device 1 includes a hub bearing in which the fitting member main body 30 and the retaining member 31 with which the sealing device main body 2 is fitted are sandwiched between the bolts 32 held by the outer ring 51. 50 is attached. Thus, the sealing device 1 can be easily attached to the hub bearing 50 by holding the fixing member 4 on the outer ring 51, and more specifically, by screwing the bolt 4 into the bolt hole 55. .

  Further, when the sealing device 1 is removed during periodic replacement of the sealing device 1, the holding of the fixing member 4 by the outer ring 51 is released, and specifically, the bolt 4 is screwed into the bolt hole 55 of the outer ring 51. Is released, the fitting member main body 30 and the retaining member 31 are removed from the outer ring 51, and the sealing device 1 is removed from the hub bearing 50.

  Next, when the sealing device main body 2 is replaced, the sealing device main body 2 is detached from the fitting member main body 30 using a press machine or the like. Then, using a press machine or the like, the new sealing device main body 2 is press-fitted into the fitting member main body 30 to be fitted, and the fitting member main body 30 into which the sealing device main body 2 is fitted is attached to the outer ring 51 as described above. Engaged, the fixing member (bolt) 4 is inserted into the fitting member main body 30 and the through holes 37 and 43 of the retaining member 31 and screwed into the outer ring 51 to be held. Thereby, the fitting member main body 30 and the retaining member 31 for fitting the sealing device main body 2 into the outer ring 51 are fixed, the sealing device 1 is fixed to the hub bearing 50, and the sealing device 1 is periodically replaced.

  As described above, according to the sealing device 1 according to the embodiment of the present invention, the sealing device 1 can be easily attached to the hub bearing 50 by attaching or detaching the fixing member 4 to or from the outer ring 51. It can be removed from the bearing 50. Further, the sealing device main body 2 which is a consumable part of the sealing device 1 can be easily removed from the fitting member main body 30 by pressing with a press machine or the like in the sealing device 1 removed from the hub bearing 50. It can be attached to the main body 30.

  Further, when the fitting member main body 30 is engaged with the outer ring 51, the protrusions 51 b of the outer ring 51 are accommodated in the notch portions 38 of the fitting member main body 30 and are engaged with each other, so Therefore, the positioning of the fitting member main body 30 with respect to the outer ring 51 can be facilitated. For this reason, alignment of the through hole 37 and the bolt hole 55 can be facilitated, and attachment of the fixing member 4 can be facilitated.

  Thus, according to the sealing device 1 which concerns on embodiment of this invention, the operation | work for periodical replacement | exchange can be made easy. Further, when the sealing device 1 is periodically replaced, it is possible to suppress the outer ring 51 and the fitting member 3 from being damaged.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments of the present invention, and includes all aspects included in the concept and claims of the present invention. In addition, the configurations may be appropriately combined as appropriate so as to achieve at least part of the problems and effects described above. For example, the shape, material, arrangement, size, and the like of each component in the above embodiment can be appropriately changed according to the specific usage mode of the present invention.

  The sealing device 1 according to the present embodiment has a notch portion 38 that engages with the convex portion 51 b of the outer ring 51 as an engaging portion for positioning between the fitting member main body 30 and the outer ring 51. However, the engagement portion with the outer ring 51 included in the fitting member main body 30 is not limited to the notch 38. The engaging part for positioning with the outer ring 51 of the fitting member main body 30 is engageable with the corresponding engaging part of the outer ring 51 and enables positioning with the outer ring 51. If it is. Further, the engaging portion of the outer ring 51 is not limited to the convex portion 51b.

  Further, the sealing device 1 according to the present embodiment is applied to the truck hub seal 50. However, the application target of the sealing device according to the present invention is not limited to this, and the hub bearing for automobiles and the industry. The present invention is applicable to all configurations that can utilize the effects of the present invention, such as mechanical bearings.

DESCRIPTION OF SYMBOLS 1,100 Sealing device 2 Sealing device main body 3 Fitting member 4 Fixing member 10,101 Reinforcement ring 11 Disk part 12 Cylindrical part 12a Outer end part 12b Outer peripheral surface 20 Elastic body part 21 Lip waist part 22,102 Seal lip 23 Dustrip 24 Lip tip portion 25 Garter spring 26 Front cover 27 Outer cover 27a Outer peripheral surface 30 Fitting member main body 31,204 Retaining stop 32 Protruding portion 33,39 Outer peripheral surface 34,40 Outer peripheral surface 35,41 Outer surface 36,42 Inner side surface 37 , 43 Through hole 38 Notch 44 Seal ring 50, 200 Hub bearing 51, 201 Outer ring 51a Outer end face 51b Protruding part 52, 202 Inner ring 52a Inner peripheral surface 53, 203 Space 204 Housing 54, 205 Rolling element 55 Bolt hole w Thickness The

JP 2014-114820 A JP 2012-040971 A JP 2009-216230 A JP-A-10-58906

As described above, in the state of use, the sealing device 1 includes a hub bearing in which the fitting member main body 30 to which the sealing device main body 2 is fitted and the retaining member 31 are sandwiched between the bolts 4 held by the outer ring 51. 50 is attached. Thus, the sealing device 1 can be easily attached to the hub bearing 50 by holding the fixing member 4 on the outer ring 51, and more specifically, by screwing the bolt 4 into the bolt hole 55. .

DESCRIPTION OF SYMBOLS 1,100 Sealing device 2 Sealing device main body 3 Fitting member 4 Fixing member 10,101 Reinforcement ring 11 Disk part 12 Cylindrical part 12a Outer end part 12b Outer peripheral surface 20 Elastic body part 21 Lip waist part 22,102 Seal lip 23 Dustrip 24 Lip tip portion 25 Garter spring 26 Front cover 27 Outer cover 27a Outer peripheral surface 30 Fitting member main body 31,204 Retaining stop 32 Protruding portion 33,39 Outer peripheral surface 34,40 Outer peripheral surface 35,41 Outer surface 36,42 Inner side surface 37 , 43 holes 38 notch 44 the seal ring 50, 200 in the hub bearing 51,201 outer ring 51a the outer end surface 51b convex portion 52,202 inner ring 52a periphery 53,203 spatial
5 4,205 Rolling element 55 Bolt hole w Thickness

Claims (5)

In a bearing device comprising an annular outer peripheral member capable of rotating relative to each other about an axis and an annular inner peripheral member at least partially surrounded by the outer peripheral member, the outer peripheral member and the inner peripheral member A sealing device for sealing between
A sealing device main body comprising: an annular reinforcing ring centered on the axis; and an annular elastic body portion centered on the axis that is attached to the reinforcing ring and formed from an elastic body;
An annular fitting member centered on the axis, the inner fitting of the sealing device main body on the outer periphery of the sealing device main body;
A fixing member that detachably fixes the fitting member to the outer peripheral side member;
The elastic body portion includes a seal lip that slidably contacts the inner circumferential member,
The fitting member can be engaged with the outer peripheral side member from the sealing target side in the axial direction,
The said fixing member enables the said fitting member to be fixed to the said outer peripheral side member in the state in which the said fitting member was engaged with the said outer peripheral side member, The sealing device characterized by the above-mentioned.   The fitting member includes at least one through hole extending in the axial direction and penetrating the fitting member, and the fixing member is inserted into the through hole and can be screwed to the outer peripheral member. The sealing device according to claim 1.   The said fitting member is provided with the engaging part engaged with the said outer peripheral side member, and this engaging part positions the said fitting member with respect to the said outer peripheral side member. Sealing device.   The sealing device according to any one of claims 1 to 3, further comprising an annular seal ring that is sandwiched between the outer peripheral side member.   5. The sealing device according to claim 1, wherein the fitting member includes a stopper that contacts the sealing device main body from the sealing target side in the axial direction.

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