JP2011196503A - Sealing device assembly for rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a slip out of a seal lip of an elastic seal member of a first annular member from a slide-contact surface of a cylinder part of a second annular member in the axial direction.SOLUTION: A projection 50 is formed to project in the radial direction on a slide-contact surface 42 side formed in the cylinder part 42 of a slinger 40 (the second annular member) in at least a part in the circumferential direction of an end surface of the slide-surface contact surface 42a, which is formed in the cylinder part 42 of the slinger 40, on a side opposite to an axial directional end surface, wherein an annular plane part 44 is disposed. The projection 50 prevents a slip out of the seal lip 38 of the elastic seal member 36 of a core metal 30 (the first annular member) from the slide-contact surface 42a of the cylinder part 42 of the slinger 40.

Description

  The present invention relates to a seal assembly for a rolling bearing. Specifically, a sealing device assembly that is inserted as an assembly at an opening end between an inner ring and an outer ring of a rolling bearing includes a first annular member having an elastic seal member having a seal lip at the tip, and the first annular member. The present invention relates to a rolling bearing sealing device assembly comprising a second annular member having a slidable contact surface slidably contacting a seal lip of an elastic seal member of the annular member, and the annular members are assembled together in the axial direction.

  Conventionally, a sealing device assembly for a rolling bearing as in Patent Document 1 and Patent Document 2 is known. In this rolling bearing sealing device assembly, the sealing device assembly inserted as an assembly at the opening end between the inner ring and the outer ring of the rolling bearing device is provided with a first elastic seal member having a seal lip attached to the tip. Of the first annular member and a second annular member having a sliding contact surface that is in sliding contact with the seal lip of the elastic sealing member of the first annular member, and the two annular members are assembled together in the axial direction. is there. In order to prevent foreign matter from entering the sliding contact surface of the second annular member that is in sliding contact with the elastic sealing member of the first annular member and damage to the elastic sealing member, the rolling bearing sealing device assembly is provided in advance. The annular member and the second annular member are combined with grease inside to provide a sealing performance.

  In the rolling bearing sealing device assembly, the seal lip of the elastic seal member of the first annular member is the second so that the combination of the first annular member and the second annular member is not separated in a single state. It is fixed by applying an elastic force in the radial direction to the slidable contact surface of the annular member, that is, by applying an interference (tightening force). By the way, in recent years, there has been a high demand for lower torque for the purpose of improving the fuel efficiency of vehicles such as automobiles, and the seal lip of the elastic seal member of the first annular member of the sealing device assembly for rolling bearings is slid on the second annular member. Increasingly, torque is reduced by reducing the amount of interference (tightening force) on the contact surface. As described above, reducing the interference (tightening force) can reduce the torque, but the fixing force between the first annular member and the second annular member in the single unit of the rolling bearing sealing device assembly is weakened. End up. Therefore, when the rolling bearing sealing device assembly is press-fitted into the opening end between the inner ring and the outer ring of the rolling bearing device, the axial direction is moved up and down (the first annular member is fixed and the second annular member is fixed). When the second annular member is fixed or the first annular member is fixed to the lower side), the sealing lip of the elastic sealing member of the first annular member is There is a problem that the possibility that both annular members are separated from each other in the axial direction with respect to the sliding contact surface becomes high.

JP 2009-197962 A JP 2004-132519 A

  Here, as a configuration in which the first annular member and the second annular member are not separated, after combining both the annular members, the annular member that covers the end surface of the second annular member is fitted and covered. Although it is conceivable to prevent the seal lip of the elastic seal member of the first annular member from being detached in the axial direction of the sliding contact surface of the second annular member, a new component is required, so the material cost and production There is a risk of increasing costs. Therefore, as a result of intensive studies, the inventors of the present invention have contacted the seal lip of the elastic seal member of the first annular member in close contact with the sliding contact surface of the second annular member with a tightening margin (tightening force). Focused on being. That is, since the seal lip of the elastic seal member of the first annular member is in close contact with the slidable contact surface of the second annular member, the seal of the elastic seal member is configured even if the lip is slightly projected on the slidable contact surface. If the lip is caught, it can be prevented from coming off from the sliding contact surface in the axial direction.

  Thus, the present invention has been devised in view of these points, and the problem to be solved by the present invention is in the cylindrical portion itself of the second annular member having a sliding surface with respect to the seal lip. By providing a protrusion shape that is resistant to the direction of separation of the seal lip, the seal lip of the elastic seal member of the first annular member is detached from the sliding contact surface of the cylindrical portion of the second annular member in the axial direction. It is to suppress.

In order to solve the above problems, the rolling bearing sealing device assembly of the present invention takes the following means.
First, a rolling bearing sealing device assembly according to a first aspect of the present invention is an elastic seal in which a sealing device assembly inserted as an assembly at an opening end between an inner ring and an outer ring of a rolling bearing has a seal lip at the tip. A first annular member to which the member is attached, and a second annular member having a sliding contact surface in sliding contact with the seal lip of the elastic seal member of the first annular member, and the two annular members are combined in the axial direction. A rolling device sealing device assembly that is assembled by being assembled, wherein the first annular member and the second annular member include a cylindrical portion, and an annular flat plate portion extending in a radial direction from an end portion of the cylindrical portion. Are formed integrally with the L-shaped cross section, and the cylindrical portion and the annular flat plate portion of the two annular members are arranged at positions facing each other and combined in a rectangular cross section, and the elasticity of the first annular member is The seal member The seal lip is configured to be in sliding contact with a slidable contact surface formed in the cylindrical portion of the second annular member by applying a radial elastic force, and is configured in the cylindrical portion of the second annular member. The sliding contact surface formed on the cylindrical portion of the second annular member is at least partially in the circumferential direction of the end surface opposite to the axial end surface on which the annular flat plate portion is disposed. A protrusion projecting in the radial direction on the side is formed, and the protrusion causes the seal lip of the elastic seal member of the first annular member to pivot from the sliding contact surface of the cylindrical portion of the second annular member. It is characterized by being suppressed in the direction.

  According to the first aspect of the present invention, the elastic seal member of the first annular member gives a radial elastic force to the slidable contact surface of which the seal lip at the tip is formed in the cylindrical portion of the second annular member. It is the structure which is done and is slidably contacted. The second annular member is provided at least in the circumferential direction of the end surface opposite to the axial end surface on which the annular flat plate portion is disposed in the sliding contact surface formed in the cylindrical portion of the second annular member. A protrusion projecting in the radial direction on the slidable contact surface side formed in the cylindrical portion is formed. By this protrusion, the seal lip of the elastic seal member of the first annular member can be prevented from detaching in the axial direction from the sliding surface of the cylindrical portion of the second annular member.

  Next, a rolling bearing sealing device assembly according to the second invention is the rolling bearing sealing device assembly according to the first invention, wherein the cylindrical portion of the second annular member on which the protrusion is formed is provided. A chamfering process is performed on the entire surface of the back surface side of the slidable contact surface at the end surface, and the process to the end surface of the cylindrical portion of the second annular member for forming the protrusion is performed by the protrusion. Is a process in which a protrusion is also formed on the back surface side with the formation on the sliding contact surface side, and the size of the protrusion protruding to the back surface side is the radial depth where the chamfering process is performed. It is characterized by being formed in a size that projects shallower than the thickness.

  According to the second aspect of the invention, the rolling bearing sealing device assembly is provided on the end surface of the cylindrical portion of the second annular member in order to smoothly press fit the opening end between the inner ring and the outer ring of the rolling bearing device. A chamfering process is performed on the entire surface of the back surface of the sliding surface. Here, the processing on the end surface of the cylindrical portion of the second annular member for forming the protrusion is processing in which the protrusion is also formed on the back surface side as the protrusion is formed on the sliding contact surface side. It is. However, the size of the protruding portion that protrudes to the back surface side is formed as a size that protrudes shallower than the radial depth on which chamfering is performed. Therefore, the rolling bearing sealing device assembly can be smoothly press-fitted into the opening end between the inner ring and the outer ring of the rolling bearing device, and the radial direction on the sliding surface side formed in the cylindrical portion of the second annular member A protrusion that protrudes toward the surface can be formed.

  Next, a rolling bearing sealing device assembly according to a third invention is the rolling bearing sealing device assembly of the first invention or the second invention, wherein the first annular member and the second annular member are assembled. When assembling the members from the axial direction, a press-fitting jig having an inclined surface with respect to the insertion direction at the time of assembling is applied to the end surface of the cylindrical portion of the second annular member and attached to the first annular member. A seal lip of the elastic seal member is press-fitted and attached to the sliding contact surface of the cylindrical portion of the second annular member, and the cylindrical portion is attached to the end surface of the press-fitting jig that is applied to the end surface of the cylindrical portion of the second annular member. A processing portion capable of forming a protrusion on the end surface of the second annular member is provided, and a sealing lip of an elastic sealing member attached to the first annular member is press-fitted into the sliding surface of the cylindrical portion of the second annular member. When mounting, the press-fitting jig is attached to the cylindrical portion of the second annular member. When the covering cormorants on the surface, the machined portion provided in the press-fitting jig, characterized in that process forming the protrusion.

  According to the third aspect of the present invention, the press-fitting jig for combining the first annular member and the second annular member from the axial direction has a protrusion formed on the end surface of the cylindrical portion of the second annular member. A processing site that can be processed is provided. Therefore, together with the combination of the first annular member and the second annular member, a protrusion can be formed on the end surface of the cylindrical portion of the second annular member, so that the processing cost and the manufacturing cost can be suppressed. .

  In the present invention, by taking the measures of the respective inventions described above, the seal lip of the elastic seal member of the first annular member can be prevented from being detached from the sliding contact surface of the cylindrical portion of the second annular member in the axial direction. it can.

It is a longitudinal cross-sectional view which shows the rolling bearing apparatus by which the sealing device assembly for rolling bearings concerning Example 1 of this invention is inserted. It is a longitudinal cross-sectional view which shows the sealing device assembly for rolling bearings concerning Example 1 of this invention. It is a longitudinal cross-sectional view which shows the slinger which is a structure of the sealing device assembly for rolling bearings concerning Example 1 of this invention. FIG. 4 is a partial enlarged cross-sectional view of a portion IV in FIG. 3. It is the side view seen by the VV line view of FIG. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing device assembly for rolling bearings concerning Example 1 of this invention. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing device assembly for rolling bearings concerning Example 1 of this invention. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing device assembly for rolling bearings concerning Example 1 of this invention. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing device assembly for rolling bearings concerning Example 1 of this invention. It is a longitudinal cross-sectional view which shows the slinger which is a structure of the sealing device assembly for rolling bearings concerning Example 2 of this invention. It is a partial expanded sectional view of the XI part of FIG. It is the side view seen by the XII-XII line view of FIG. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing apparatus assembly for rolling bearings concerning Example 2 of this invention. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing apparatus assembly for rolling bearings concerning Example 2 of this invention. It is a longitudinal cross-sectional view which shows the slinger which is a structure of the sealing device assembly for rolling bearings concerning Example 3 of this invention. It is a partial expanded sectional view of the XVI part of FIG. It is the side view seen by the XVII-XVII line view of FIG. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing device assembly for rolling bearings concerning Example 3 of this invention. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing device assembly for rolling bearings concerning Example 3 of this invention. It is a longitudinal cross-sectional view which shows the slinger which is a structure of the sealing device assembly for rolling bearings concerning Example 4 of this invention. It is a partial expanded sectional view of the XXI part of FIG. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing device assembly for rolling bearings concerning Example 4 of this invention. It is a longitudinal cross-sectional view which shows the assembly structure of the sealing device assembly for rolling bearings concerning Example 4 of this invention.

  A mode for carrying out the present invention will be described in accordance with an embodiment.

A first embodiment of the present invention will be described with reference to FIGS. In addition, illustration of each figure in the present Example 1 is exaggerated for easy understanding, and the same applies to each figure corresponding to other examples shown below.
As shown in FIG. 1, the rolling bearing device 10 is configured to support a vehicle wheel on a suspension device. The rolling bearing device 10 includes inner rings 12 and 12 having an inner ring raceway surface 12a on an outer peripheral surface, an outer ring 14 having a double row outer ring raceway surface 14a on an inner peripheral surface, a plurality of rolling elements 16, and the rolling elements 16. Is comprised of a retainer 18 that holds the inner ring raceway surface 12a and the outer ring raceway surface 14a in a rollable manner. Grease is sealed in the internal space of the rolling bearing device 10 to reduce friction and wear.
And in order to prevent the grease enclosed in the internal space of the rolling bearing device 10 from leaking to the outside and to prevent the entry of foreign matter such as water, dust and mud from the outside, the inner ring 12 of the rolling bearing device 10. , 12 and the outer ring 14 is provided with a rolling bearing sealing device assembly 20 configured as an assembly composed of two annular members. The rolling bearing sealing device assembly 20 will be described.

  As shown in FIG. 2, this rolling bearing sealing device assembly 20 is roughly composed of a cored bar 30 (first annular member) to which an elastic seal member 36 having a seal lip 38 is attached at the tip, and the core. It consists of a slinger 40 (second annular member) having a sliding contact surface 42a that is in sliding contact with the seal lip 38 of the elastic sealing member 36 attached to the gold 30. Both the metal core 30 and the slinger 40 are formed in a ring shape by plastic processing, punching processing or the like of a metal plate member (for example, carbon steel plate), and end portions of the cylindrical portions 32 and 42 and the cylindrical portions 32 and 42 are formed. Are integrally formed in an L-shaped cross section by annular flat plate portions 34 and 44 extending radially from the portion. The cylindrical portion 32 and 42 and the annular flat plate portions 34 and 44 of the core metal 30 and the slinger 40 are arranged and arranged at positions facing each other, and are combined from the axial direction to form a rectangular cross section. The core 30 of the first embodiment corresponds to the “first annular member” of the present invention, and the slinger 40 of the first embodiment corresponds to the “second annular member” of the present invention.

The core metal 30 and the elastic seal member 36 will be described.
As shown in FIG. 2, the core metal 30 includes a cylindrical portion 32 whose outer peripheral surface is fitted to the inner peripheral surface of the outer ring 14, and an annular flat plate portion 34 that extends from the end of the cylindrical portion 32 in the inner diameter direction. Are integrally formed in a L-shaped cross section. The metal core 30 is provided with a seal lip 38 of an elastic seal member 36 in order to prevent entry of foreign matter such as water, dust and mud from the outside. As the seal lip 38 of the elastic seal member 36, for example, synthetic rubber such as nitrile rubber or acrylic rubber, natural rubber, soft synthetic resin, or the like can be appropriately selected. In this embodiment, synthetic rubber is selected and attached to the annular flat plate portion 34 of the core metal 30 by vulcanization adhesion. The sealing lip 38 of the elastic seal member 36 at the tip is in sliding contact with the cylindrical portion 42 and the annular flat plate portion 44 of the slinger 40 (second annular member) to prevent entry of foreign matters such as water, dust, mud and the like from the outside. The slinger 40 is formed so as to protrude in three directions toward the cylindrical portion 42 and the annular flat plate portion 44 of the slinger 40. The seal lip 38 has a main lip 38a, an auxiliary lip 38b, and a side lip 38c. The seal lip 38 is in sliding contact with a sliding contact surface 42a formed on the cylindrical portion 42 of the slinger 40 by applying a radial elastic force. Are the main lip 38a and the auxiliary lip 38b. Further, the side lip 38c is in sliding contact with the sliding contact surface 44a formed on the annular flat plate portion 44 of the slinger 40 by applying an elastic force in the axial direction.

The slinger 40 will be described.
As shown in FIG. 3, the slinger 40 is integrally formed in a cross-sectional L shape by a cylindrical portion 42 and an annular flat plate portion 44 extending from the end portion of the cylindrical portion 42 in the outer diameter direction. The outer peripheral surface of the cylindrical portion 42 is configured as a slidable contact surface 42 a that is in sliding contact with the main lip 38 a and the auxiliary lip 38 b among the seal lips 38 formed on the core metal 30, and the inner peripheral surface on the back side is the inner ring 12. , 12 is configured as a fitting surface 42b fitted to the outer peripheral surface. Further, a chamfering process 46 is applied to the entire periphery of the right end of the fitting surface 42b as viewed in FIG. 2 in order to smoothly fit the outer circumferential surfaces of the inner rings 12, 12. In the first embodiment, the dimensions of the chamfering process 46 are set as follows. The thickness of the slinger 40 is 0.6 mm. A chamfering process 46 is performed at an angle of 20 degrees with respect to the fitting surface 42b from a position 0.4 mm from the end surface of the cylindrical portion 42. In addition, the dimension of the chamfering process 46 shown in the first embodiment is an example, and is set to an appropriate dimension depending on the size, thickness, material, and the like of the slinger 40 as a whole.

  Further, as shown in FIGS. 4 and 5, a part of the right end surface in the circumferential direction as seen in FIG. 4 is chamfered 46 and protrudes in the radial direction on the sliding contact surface 42 a side. A protruding portion 50a is formed by caulking. The end surface on which the protrusion 50a is formed is an end surface opposite to the axial end surface on which the annular flat plate portion 44 is disposed on the sliding contact surface 42a formed on the cylindrical portion 42 of the slinger 40. The radially outward projecting portion 50a is configured to prevent the main lip 38a and the auxiliary lip 38b of the seal lip 38 from being separated from the sliding contact surface 42a of the cylindrical portion 42 of the slinger 40 in the axial direction. . It is preferable that there are two or more protrusions 50 a in the circumferential direction of the end surface of the cylindrical portion 42 of the slinger 40. Furthermore, it is preferable that they are arranged at equal intervals. As the protrusion 50 is formed on the sliding contact surface 42a side, the protrusion 50b is also formed on the back-side fitting surface 42b side. The size of the protrusion 50b is chamfered 46. It is formed as a size that protrudes shallower than the radial depth. For this reason, the protrusion 50 does not affect the fitting of the slinger 40 to the outer peripheral surfaces of the inner rings 12 and 12. Here, the chamfering 46 of the cylindrical portion 42 of the slinger 40 of the first embodiment is performed, so that the radial depth is about 0.14 mm. Therefore, the radial size of the protrusion 50b in the first embodiment is preferably within 0.1 mm to 0.14 mm.

As shown in FIGS. 6 to 9, the protrusion 50 is formed using a press-fitting jig 70 that combines the core metal 30 and the slinger 40.
The press-fitting jig 70 fits the core metal 30 and the slinger 40 concentrically from the axial direction, and seals the lip 38 of the elastic seal member 36 attached to the core metal 30 on the sliding contact surface 42a of the cylindrical portion 42 of the slinger 40. For press fitting. As shown in FIG. 6, the press-fitting jig 70 is generally composed of a shaft portion 72, a diameter-expanded shaft portion 74, a contact surface 76, an inclined surface 78, and a protruding portion 80. The shaft portion 72 is formed to have substantially the same diameter as the shaft diameter of the cylindrical portion 42 so as to be inserted into the cylindrical portion 42 of the slinger 40 in order to fit the core metal 30 and the slinger 40 concentrically from the axial direction. . The diameter-expanded shaft portion 74 is formed as a shaft portion 72 whose diameter is larger than the thickness of the thickness of the slinger 40 with respect to the diameter of the fitting surface 42 b of the cylindrical portion 42 of the slinger 40. As shown in FIGS. 8 and 9, the diameter-expanded shaft portion 74 is a guide for guiding the main lip 38 a and the auxiliary lip 38 b of the seal lip 38 attached to the core metal 30 to the sliding surface of the slinger 40. It is configured as a surface. Since the above-described shaft portion 72 and the diameter-expanded shaft portion 74 are formed concentrically, a step portion is formed. This step portion is configured as a contact surface 76. The abutting surface 76 is formed by inserting the shaft portion 72 of the press-fitting jig 70 into the cylindrical portion 42 of the slinger 40 and applying the end surface of the cylindrical portion 42 of the slinger 40 to the abutting surface 76 so that the slinger 40 is pivoted. It is a part fixed in the direction. The inclined surface 78 is a surface in which the main lip 38a and the auxiliary lip 38b among the seal lips 38 attached to the core metal 30 are sequentially expanded in diameter and elastically deformed to the diameter of the expanded diameter shaft portion 74 in the outer diameter direction. is there. As shown in FIG. 7, the protruding portion 80 is formed on the contact surface 76, and is for forming the protrusion 50 on the end surface of the cylindrical portion 42 of the slinger 40. The protruding portion 80 is formed so as to protrude in a direction facing the end surface of the slinger 40. Then, when the end surface of the cylindrical portion 42 of the slinger 40 is applied to the contact surface 76, the protruding portion 50 is processed and formed by the protruding portion 80. The protruding portion 80 in Example 1 corresponds to the “processed portion” of the present invention.

With the above configuration, the assembly process for combining the cored bar 30 and the slinger 40 from the axial direction is as follows. As shown in FIG. 6, first, the shaft portion 72 of the press-fitting jig 70 is inserted into the cylindrical portion 42 of the slinger 40. As shown in FIG. 7, at this time, the end surface of the cylindrical portion 42 of the slinger 40 is inserted toward the contact surface 76 of the press-fitting jig 70 to fix the applied slinger 40. Here, the contact surface 76 of the press-fitting jig 70 is provided with a protruding portion 80 that forms the protruding portion 50 on the end surface of the cylindrical portion 42 of the slinger 40. The protrusion 50 is processed and formed on the end surface of the cylindrical portion 42 of the slinger 40 by pressing the protruding portion 80. As shown in FIGS. 8 and 9, the seal lip 38 of the elastic seal member 36 attached to the core metal 30 is elastically deformed in the outer diameter direction to the diameter of the enlarged diameter shaft portion 74 along the inclined surface 78. After that, it is guided and attached to the sliding contact surface 42a of the cylindrical portion 42 of the slinger 40. In this way, the rolling bearing sealing device assembly 20 is assembled.
As described above, the method for assembling the rolling bearing sealing device assembly 20 in which the cored bar 30 and the slinger 40 are combined has been described. However, as will be described below, the cored bar 30 and the slinger 40 are separately assembled into the rolling bearing unit 10. You may make it fit. That is, the slinger 40 is temporarily assembled to the inner ring 12 of the rolling bearing 10, and a jig having a shape different from the above-described jig 70 (for example, the shaft portion 72 does not exist, the diameter-expanded shaft portion 74 and the contact surface 76 are present. And the slanted surface 78 and the projecting portion 80), while the projecting portion 50 is formed, the slinger 40 is pushed inward in the axial direction together with the slinger 40 to position the slinger 40 with respect to the inner ring 12, and thereafter Then, the annular flat plate portion 34 of the metal core 30 is pushed and positioned inward in the axial direction using a jig. As a result, the above-described rolling bearing sealing device assembly 20 can be directly assembled to the rolling bearing 10 by this method. This method can be similarly applied to Example 2 described later.

  According to the rolling bearing sealing device assembly 20 according to the first embodiment, the elastic seal member 36 of the cored bar 30 has the sliding lip 38 formed on the cylindrical portion 42 of the slinger 40 with the seal lip 38 at the tip thereof. On the other hand, the elastic force in the radial direction is applied to make sliding contact. The cylindrical portion of the slinger 40 is provided at least in the circumferential direction of the end surface opposite to the axial end surface where the annular flat plate portion 44 is disposed in the sliding contact surface 42a formed on the cylindrical portion 42 of the slinger 40. The protrusion part 50a which protrudes toward the radial direction by the side of the slidable contact surface 42a comprised in 42 is formed. The protrusion 50 a prevents the seal lip 38 of the elastic seal member 36 of the core metal 30 from being detached from the sliding contact surface 42 a of the cylindrical portion 42 of the slinger 40 in the axial direction.

  Further, the rolling bearing sealing device assembly 20 has a sliding contact surface 42a on the end surface of the cylindrical portion 42 of the slinger 40 in order to smoothly press fit the opening end between the inner rings 12, 12 and the outer ring 14 of the rolling bearing device 10. A chamfering process 46 is applied to the entire surface of the back surface side of. Here, in the processing of the end surface of the cylindrical portion 42 of the slinger 40 for forming the protrusion 50, the protrusion 50b is also formed on the back surface side as the protrusion 50a is formed on the sliding contact surface 42a side. Processing. However, the size of the protrusion 50b that protrudes to the back surface side is formed so as to protrude shallower than the radial depth on which the chamfering process 46 is performed. Therefore, the rolling bearing sealing device assembly 20 can be smoothly press-fitted into the opening end between the inner rings 12 and 12 and the outer ring 14 of the rolling bearing device 10, and the sliding contact surface formed on the cylindrical portion 42 of the slinger 40. The protrusion 50a which protrudes toward the radial direction on the 42a side can be formed.

  Further, the press-fitting jig 70 that combines the core metal 30 and the slinger 40 from the axial direction is provided with a protruding portion 80 that can form the protrusion 50 on the end surface of the cylindrical portion 42 of the slinger 40. Therefore, since the protrusion 50 can be formed on the end surface of the cylindrical portion 42 of the slinger 40 together with the combination of the core metal 30 and the slinger 40, the processing cost and the manufacturing cost can be suppressed.

  Next, a rolling bearing sealing device assembly 220 according to Embodiment 2 of the present invention will be described with reference to FIGS. As shown in FIGS. 10 to 12, in the second embodiment, the shape of the protrusion 250a protruding in the radial direction on the sliding contact surface 242a side formed in the cylindrical portion 242 of the slinger 240 is the first embodiment. Is different. In the second embodiment, the projecting portion 250 is pressed by a spur-shaped projection portion 280 orthogonal to the circumferential direction on the end surface of the cylindrical portion 242 of the slinger 240 and protrudes in a mountain shape on both the sliding contact surface 242a side and the fitting surface 242b side. The protrusions 250a and 250b are formed by caulking. As shown in FIGS. 13 and 14, the protruding portion 280 formed on the contact surface 276 of the press-fitting jig 270 according to the second embodiment is a spur-shaped protrusion toward the end surface of the cylindrical portion 242 of the slinger 240. A region 280 is formed to protrude. The spur-shaped projection portion 280 is formed in a direction orthogonal to the circumferential direction of the cylindrical portion 242 of the slinger 240. The shape of the protrusion 250 on the end surface of the cylindrical portion 242 of the slinger 240 and the shape other than the protrusion portion 280 of the press-fitting jig 270 are the same as in the first embodiment, and the method for forming the protrusion 250 is also the same as in the first embodiment. Therefore, detailed description is omitted. In the second embodiment, the same operational effects as those of the first embodiment can be obtained, and the protruding portion 280 of the press-fitting jig 270 has a flat tooth shape and does not have a complicated shape. Is easy to manufacture.

Next, a rolling bearing sealing device assembly 320 according to Embodiment 3 of the present invention will be described with reference to FIGS. In the third embodiment, as shown in FIGS. 15 to 17, the shape of the protrusion 350 protruding in the radial direction on the sliding contact surface 342 a side formed in the cylindrical portion 342 of the slinger 340 is the first embodiment. And different from the second embodiment. The protrusions 350 according to the third embodiment are formed as protrusions 350 that are bent in a mountain shape toward the sliding contact surface 342 a at a plurality of locations in the circumferential direction on the end surface of the cylindrical portion 342 of the slinger 340.
As shown in FIGS. 18 to 19, the protrusion 350 is formed as follows. First, as for the end surface shape of the cylindrical portion 342 of the slinger 340, the chamfering process 346 is performed and the thinner part 347 is further processed from the fitting surface 342b toward the sliding contact surface 342a. The protruding portion 380 formed on the contact surface 376 of the press-fitting jig 370 is formed so as to project in a triangular pyramid shape toward the end surface of the cylindrical portion 342 of the slinger 340. The protrusion 350 is formed by caulking a thin-walled thin portion 347 on the sliding contact surface 342a side by pressing the protruding portion 380. The shape of the protrusion 350 on the end surface of the cylindrical portion 342 of the slinger 340 and the shape other than the protruding portion 380 of the press-fitting jig 370 are the same as those in the first and second embodiments, and the method for forming the protrusion 350 is also implemented. Since it is common with Example 1 and Example 2, detailed description is abbreviate | omitted. The third embodiment can obtain the same effects as the first and second embodiments. Further, the protrusion 350 is not formed on the fitting surface 342b side. Therefore, there is an advantage that the shape of the protrusion 350 can be set without considering the influence on the part of the chamfering process 346 formed on the fitting surface 342b of the slinger 340.

Next, a rolling bearing sealing device assembly 420 according to Embodiment 4 of the present invention will be described with reference to FIGS. In the fourth embodiment, as shown in FIGS. 20 and 21, the protrusion 350 is formed on the entire circumference of the cylindrical portion 442 of the slinger 440.
Here, after the two annular members are combined so that the core metal 30 and the slinger 440 are not generally separated, the end surface of the slinger 440 is bent toward the slidable contact surface 442a to form a U-shaped cross section. It is also possible to prevent separation. However, after combining both annular members, it is difficult to bend the end surface of the slinger 440, which may increase the processing cost. Further, it has been considered that when the bending process is performed, the surface accuracy of the sliding contact surface 442a is affected and the sealing performance (sealing performance) may be deteriorated. In the fourth embodiment, the projection 450 is formed as described below in consideration of the difficulty in bending and the influence on the surface accuracy of the sliding contact surface 442a. First, the end surface shape of the cylindrical portion 442 of the slinger 440 is processed into a thin portion 447 together with the chamfering process 446 in the same manner as in the third embodiment.
Here, the end surface of the slinger 440 in the fourth embodiment is set to the following shape. As shown in FIG. 22, the thickness of the slinger 440 is 0.6 mm. The plate thickness t of the thin portion 447 of the cylindrical portion 442 is set as a plate thickness of 0.1 mm to 0.2 mm. The axial length L is set to a length of t × 1.5. Therefore, L is formed in the range of 0.15 to 0.3 mm. As shown in FIGS. 22 and 23, the contact surface 476 of the press-fitting jig 470 has a diameter expanded as a protruding portion 480 at a position corresponding to the thin portion 447 at the end of the cylindrical portion 442 of the slinger 440. An inclined surface that gradually expands to the diameter of the shaft portion 474 is formed. The protrusion 450 is formed by bending the thin portion 447 on the sliding contact surface 442a side by pressing the inclined surface of the protrusion portion 480. In the fourth embodiment, the protrusion 450 formed by the bending process is formed with a height G (see FIG. 21) of 0.1 mm or more from the sliding contact surface 442a. The setting of the thin portion 447 at the end of the cylindrical portion 442 of the slinger 440, the shape of the protrusion 450, and the shape of the inclined surface of the protrusion portion 480 of the press-fitting jig 470 are examples, and the overall size of the slinger 440, Appropriate dimensions are set according to the plate thickness, material, and the like. The shape of the protrusion 450 on the end surface of the cylindrical portion 442 of the slinger 440 and the shape other than the protruding portion 480 of the press-fitting jig 470 are the same as those in the first to third embodiments, and the method for forming the protrusion 450 is also implemented. Since it is common with Example 1 to Example 3, detailed description is abbreviate | omitted. In the fourth embodiment, the same effects as those of the first to third embodiments can be obtained. Further, the protrusion 450 can be formed on the entire circumference of the end surface of the cylindrical portion 442 of the slinger 440. Further, since the thin portion 447 formed at the end of the cylindrical portion 442 of the slinger 440 is bent by pressing, a large load is not applied to the sliding contact surface 442a during the processing. Therefore, the surface accuracy of the slidable contact surface 442a is hardly affected, and a decrease in sealing performance (sealing performance) can be prevented.

Although the embodiment of the present invention has been described with respect to the first to fourth embodiments, the rolling bearing sealing device assembly of the present invention is not limited to the present embodiment, and does not depart from the gist of the present invention. However, the present invention can be implemented in various forms.
For example, in the first to third embodiments, the protrusions 50, 250, and 350 are formed using press-fitting jigs 70, 270, and 370 that combine the core metal 30 and the slinger 40, 240, and 340. However, the present invention is not limited to this, and the end surfaces of the cylindrical portions 42, 242 and 342 may be formed by manually pressing from the axial direction with a tool having a sharp tip such as a punch.

DESCRIPTION OF SYMBOLS 10 Rolling bearing apparatus 12 Inner ring 12a Inner ring raceway surface 14 Outer ring 14a Outer ring raceway surface 16 Rolling body 18 Cage 20 Rolling bearing sealing device assembly 30 Core metal 32 Cylindrical part 34 Annular flat plate part 36 Elastic seal member 38 Seal lip 38a Main lip 38b Auxiliary lip 38c Side lip 40 Slinger 42 Cylindrical portion 42a Sliding contact surface 42b Fitting surface 44 Annular flat plate portion 44a Sliding contact surface 46 Chamfering 50 Projection 50a Projection 50b Projection 70 Press fitting jig 72 Shaft 74 Expanding shaft Portion 76 Contact surface 78 Inclined surface 80 Projection site 220 Rolling bearing sealing device assembly 240 Slinger 242 Cylindrical portion 242a Sliding contact surface 242b Fitting surface 250 Projection 250a Projection 250b Projection 270 Press-fit jig 276 Contact surface 280 Protruding part 320 Rolling bearing sealing device assembly 340 Slinger 342 Cylindrical portion 34 2a Sliding contact surface 342b Fitting surface 346 Chamfering process 347 Thin portion 350 Projection portion 370 Press fitting jig 376 Contact surface 380 Projection portion 420 Rolling bearing sealing device assembly 440 Slinger 442 Cylindrical portion 442a Sliding contact surface 446 Chamfering processing 447 Thin wall Part 450 Projection 470 Press-fit jig 474 Expanded shaft part 476 Abutment surface 480 Projection part

Claims (3)

A sealing device assembly inserted as an assembly at an opening end between an inner ring and an outer ring of a rolling bearing includes a first annular member having an elastic seal member having a seal lip attached to a tip, and the first annular member A rolling bearing sealing device assembly comprising a second annular member having a sliding contact surface in sliding contact with a sealing lip of the elastic sealing member, the annular members being assembled in combination from the axial direction,
The first annular member and the second annular member are integrally formed in a cross-sectional L shape by a cylindrical portion and an annular flat plate portion extending in a radial direction from an end portion of the cylindrical portion, Each of the cylindrical portion and the annular flat plate portion are arranged and configured at positions facing each other and combined in a rectangular cross section,
The elastic seal member of the first annular member is configured so that the seal lip at the tip thereof is in sliding contact with a sliding contact surface formed on the cylindrical portion of the second annular member by applying a radial elastic force. And
At least part of the circumferential direction of the end surface opposite to the axial end surface on which the annular flat plate portion is disposed in the sliding contact surface formed in the cylindrical portion of the second annular member is the second annular member. A protrusion is formed that protrudes in the radial direction on the slidable contact surface side configured in the cylindrical portion of the member,
For the rolling bearing, the protrusion prevents the seal lip of the elastic seal member of the first annular member from detaching in the axial direction from the sliding surface of the cylindrical portion of the second annular member. Sealing device assembly. The rolling bearing sealing device assembly according to claim 1,
A chamfering process is performed on the entire circumference of the surface on the back surface side of the sliding contact surface in the end surface of the cylindrical portion of the second annular member where the protrusion is formed,
The processing of the second annular member for forming the protrusion on the end surface of the cylindrical portion is a process in which the protrusion is also formed on the back surface side as the protrusion is formed on the sliding surface side. The rolling device sealing device assembly is characterized in that the size of the projecting portion projecting on the back surface side is formed as a size projecting shallower than the radial depth subjected to the chamfering process. A rolling bearing sealing device assembly according to claim 1 or 2,
When assembling the first annular member and the second annular member in combination from the axial direction,
A press-fitting jig having an inclined surface with respect to the insertion direction at the time of assembly is applied to the end surface of the cylindrical portion of the second annular member, and the seal lip of the elastic seal member attached to the first annular member is attached to the second annular member. Press fit on the sliding surface of the cylindrical part of the member,
The end surface of the press-fitting jig applied to the end surface of the cylindrical portion of the second annular member is provided with a processing part capable of forming a protrusion on the end surface of the cylindrical portion, and the second annular member When press fitting the seal lip of the elastic seal member attached to the first annular member on the sliding surface of the cylindrical portion of the member, when applying the press fitting jig to the end surface of the cylindrical portion of the second annular member A rolling bearing sealing device assembly, wherein the protrusion is processed and formed by a processing portion provided in a press-fitting jig.

Images