Bearing device

Abstract

To reduce a size while maintaining a high sealability between an outer ring and an inner ring.SOLUTION: In an outer ring, at least one annular outer ring groove that opens on an inner ring side on an opposite side across an arrangement space in a thickness direction is formed. In an inner ring, at least one annular inner ring groove that opens on an outer ring side on an opposite side across the arrangement space in the thickness direction is formed. On each of the opposite sides across the arrangement space in the thickness direction, at least one elastically deformable first seal member and elastically deformable second seal member are positioned. The first seal member is provided with a first attached part which is attached to the outer ring groove or the inner ring groove in an inserted state and a first inserted part which is inserted into the inner ring groove and the outer ring groove. The second seal member is provided with a second attached part which is attached to the outer ring groove or the inner ring groove in an inserted state and a second inserted part which is inserted into the inner ring groove and the outer ring groove.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to the technical field of a bearing device having an outer ring, an inner ring, and bearing balls, in which one of the outer ring or the inner ring is rotated relative to the other.

Background Art

[0002] There is a bearing device having an outer ring, an inner ring, and a plurality of bearing balls, in which one of the outer ring or the inner ring is rotated relative to the other. An arrangement space is formed between the outer ring and the inner ring of the bearing device, and a plurality of bearing balls are arranged side by side in the circumferential direction in the arrangement space.

[0003] Such a bearing device is used in various structures having a movable part and a fixed part. By using the bearing device in the structure, the movable part can be smoothly rotated (swiveled) relative to the fixed part. One of the outer ring or the inner ring is attached to the movable part, and the other of the outer ring or the inner ring is attached to the fixed part.

[0004] On the other hand, in the bearing device, an elastically deformable seal member for sealing the gap formed between the outer ring and the inner ring is provided (see, for example, Patent Document 1). By providing the seal member, the scattering of the grease filled in the arrangement space to the outside through the gap is prevented, and the intrusion of foreign matters such as moisture and dust from the outside into the gap is prevented.

[0005] In the bearing device described in Patent Document 1, two seal members, a first seal member and a second seal member, are provided, and mounting grooves for mounting the first seal member and the second seal member to the outer ring and the inner ring, respectively, are formed. A part of the first seal member inserted and mounted in the mounting groove of the outer ring is pressed against the outer surface of the inner ring, and a part of the second seal member inserted and mounted in the mounting groove of the inner ring is pressed against the outer surface of the outer ring.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] By the way, in the bearing device described in Patent Document 1, due to the mounting positions and pressing positions of the first seal member and the outer and inner rings of the second seal member, the outer and inner rings are arranged in a state where they are displaced in the thickness direction. Therefore, the outer and inner rings are arranged in a state where they have a step, and accordingly, the overall thickness becomes thick, which hinders miniaturization.

[0008] Therefore, the bearing device of the present invention aims to achieve miniaturization while ensuring high sealing performance between the outer and inner rings.

Means for Solving the Problems

[0009] The bearing device according to the present invention is used in a structure in which a movable part rotates with respect to a fixed part, and one of the outer ring or the inner ring is attached to the fixed part as a fixed ring and the other is attached to the movable part as a rotating ring, and a plurality of bearing balls are arranged between the outer ring and the inner ring to form an arrangement space. The outer ring and the inner ring have the axial direction of the rotation axis as the thickness direction. At least one annular outer ring groove opened to the inner ring side is formed on each opposite side of the outer ring sandwiching the arrangement space in the thickness direction, and at least one annular inner ring groove opened to the outer ring side is formed on each opposite side of the inner ring sandwiching the arrangement space in the thickness direction. On the opposite side sandwiching the arrangement space in the thickness direction, there are at least one each of an elastically deformable Annular first seal member and an elastically deformable AnnularThe second seal member is positioned, and the first seal member is provided with a first attached portion attached in a state of being inserted into the outer ring groove or the inner ring groove and a first inserted portion inserted into the inner ring groove or the outer ring groove. The second seal member is provided with a second attached portion attached in a state of being inserted into the outer ring groove or the inner ring groove and a second inserted portion inserted into the inner ring groove or the outer ring groove. The inner ring groove or the outer ring groove into which the first inserted portion and the second inserted portion are respectively inserted is opened only on the outer peripheral surface of the inner ring or only on the inner peripheral surface of the outer ring. The surfaces forming the inner ring groove or the outer ring groove into which the first inserted portion and the second inserted portion are respectively inserted face each other in the thickness direction and have the same dimension in the depth direction of the groove, and there are two Parallel surfaces, Two parallel surfaces that face each other in the thickness direction and have the same dimension in the depth direction of the groove are formed as the surfaces that form the outer ring groove or the inner ring groove into which the first attachment portion and the second attachment portion are respectively inserted. the first seal member and the second seal member are positioned inside the outer surface in the thickness direction of the outer ring and the outer surface in the thickness direction of the inner ring. The first inserted portion is formed in a shape in which the thickness decreases as it separates from the first attachment portion. The first inserted portion is bent in the thickness direction with respect to the first attachment portion and is elastically deformable with respect to the first attachment portion. Concavo-convex portions are formed on one surface in the thickness direction of the first attachment portion so as to be crushed in contact with one of the parallel surfaces when inserted into the outer ring groove or the inner ring groove. The direction in which the concavities and convexities of the concavo-convex portions formed on the first attachment portion are arranged is in the radial direction of the first seal member. The boundary portion between the first attachment portion and the first inserted portion is formed such that one surface in the thickness direction is a convex curved surface and the other surface in the thickness direction is a concave curved surface. The second inserted portion is formed in a shape in which the thickness decreases as it separates from the second attachment portion. The second inserted portion is bent in the thickness direction with respect to the second attachment portion and is elastically deformable with respect to the second attachment portion. Concavo-convex portions are formed on one surface in the thickness direction of the second attachment portion so as to be crushed in contact with one of the parallel surfaces when inserted into the inner ring groove or the outer ring groove. The direction in which the concavities and convexities of the concavo-convex portions formed on the second attachment portion are arranged is in the radial direction of the second seal member. The boundary portion between the second attachment portion and the second inserted portion is formed such that one surface in the thickness direction is a convex curved surface and the other surface in the thickness direction is a concave curved surface. The first inserted portion is in close contact with one of the parallel surfaces that form the inner ring groove or the outer ring groove, and the second inserted portion is in close contact with one of the parallel surfaces that form the inner ring groove or the outer ring groove. That is.

[0010] As a result, each part of the first seal member and each part of the second seal member are inserted into the outer ring groove and the inner ring groove located on the opposite sides across the arrangement space, and the arrangement space of the first seal member and the second seal member does not exist on the outer surface side in the thickness direction of the outer ring and the inner ring.

Effect of the Invention

[0013] According to the present invention, each part of the first seal member and each part of the second seal member are inserted into the outer ring groove and the inner ring groove located on the opposite sides across the arrangement space, and the arrangement space of the first seal member and the second seal member does not exist on the outer surface side in the thickness direction of the outer ring and the inner ring. Therefore, it is possible to achieve miniaturization while ensuring high sealing performance between the outer ring and the inner ring.

[0014] According to another aspect of the present invention, each part of the seal member is inserted into the outer ring groove and the inner ring groove, and the arrangement space of the seal member does not exist on the outer surface side in the thickness direction of the outer ring and the inner ring. Therefore, it is possible to achieve miniaturization while ensuring high sealing performance between the outer ring and the inner ring.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0016] Hereinafter, embodiments for carrying out the bearing device of the present invention will be described with reference to the accompanying drawings.

[0017] <Schematic Configuration of Crusher> First, as an example of a structure in which a bearing device (swivel bearing) 1 is used, a crusher 100 for demolishing a building or the like will be described (see FIG. 1). However, the structure in which the bearing device 1 is used is not limited to the crusher 100, and the bearing device 1 can be used for various other structures having a structure in which a movable part rotates (swivels) with respect to a fixed part.

[0018] The crusher 100 has a main body 101 that sandwiches and crushes an object to be crushed and a bracket 102 that is attached to an arm such as a hydraulic excavator (not shown). The main body 101 and the bracket 102 are connected via a connecting structure portion 103. The main body 101 is rotatable (swivellable) with respect to the bracket 102, and the main body 101 functions as a movable part and the bracket 102 functions as a fixed part.

[0019] The main body 101 has a base portion 101a connected to the bracket 102 via a connecting structure portion 103 and a pair of clamping portions 101b connected to the base portion 101a so as to be rotatable in a direction of approaching and separating from each other.

[0020] The bracket 102 is attached to an arm such as a hydraulic excavator via a fastener such as a bolt.

[0021] The bearing device 1 is disposed inside the connecting structure portion 103.

[0022] <Configuration of Bearing Device> Next, the configuration of the bearing device 1 will be described (see FIGS. 2 to 7).

[0023] The bearing device 1 has an outer ring 2, an inner ring 3, and a plurality of bearing balls 4 (see FIGS. 2 and 3). The outer ring 2 is attached to, for example, the bracket 102 of the crusher 100 and functions as a fixed ring, and the inner ring 3 is attached to, for example, the main body 101 of the crusher 100 and functions as a rotating ring. The inner ring 3 is located inside the outer ring 2.

[0024] Note that in the bearing device 1, the inner ring 3 may be attached to the bracket 102 of the crusher 100 to function as a fixed ring, and the outer ring 2 may be attached to the main body 101 of the crusher 100 to function as a rotating ring.

[0025] The axial direction of the rotation axis (central axis) P of the outer ring 2 and the inner ring 3 is the thickness direction. The outer ring 2 and the inner ring 3 have, for example, the same thickness, and one outer surface 2X in the thickness direction of the outer ring 2 and one outer surface 3X in the thickness direction of the inner ring 3 are, for example, located on the same plane, and the other outer surface 2Y in the thickness direction of the outer ring 2 and the other outer surface 3Y in the thickness direction of the inner ring 3 are, for example, located on the same plane.

[0026] A plurality of attachment holes 2a penetrating in the thickness direction are formed in the outer ring 2 at equal intervals in the circumferential direction. The outer ring 2 is attached to the bracket 102 by inserting a fixture such as a mounting bolt into the attachment hole 2a. A fixing hole 2b penetrating in the thickness direction is formed in the outer ring 2 between two attachment holes 2a.

[0027] A ball arrangement recess 5 opened on the inner peripheral surface is formed in the outer ring 2, and the ball arrangement recess 5 extends in the circumferential direction and is formed in an annular shape (see FIG. 3). A filling groove 5a communicating with the ball arrangement recess 5 and filled with grease is formed in the outer ring 2, and the filling groove 5a communicates with the central portion of the ball arrangement recess 5 in the thickness direction of the outer ring 2. An insertion hole 2c opened in the radial direction is formed in the outer ring 2, and the insertion hole 2c communicates with the fixing hole 2b (see FIGS. 2 and 3). The bearing balls 4 are inserted through the insertion hole 2c.

[0028] The outer ring 2 is formed with a recess 2d opened on the outer peripheral surface, and a grease filling hole (not shown) communicates with the recess 2d. The grease filling hole is closed by a grease nipple 6 before and after the filling of grease, and when filling the grease, the grease nipple 6 is removed from the outer ring 2, whereby Open this is done. In a state where the grease nipple 6 closes the grease filling hole, the part protruding outward from the grease filling hole is positioned in the recess 2d without protruding outward from the outer peripheral surface of the outer ring 2.

[0029] On the outer ring 2, an outer ring mounting groove 7 and an outer ring insertion groove 8 that both function as outer ring grooves are formed on opposite sides sandwiching the ball arrangement recess 5 in the thickness direction (see Fig. 3). Both the outer ring mounting groove 7 and the outer ring insertion groove 8 open to the inner peripheral surface of the outer ring 2 and are formed in an annular shape. The outer ring mounting groove 7 is formed at one end in the thickness direction of the outer ring 2, and the outer ring insertion groove 8 is formed at the other end in the thickness direction of the outer ring 2.

[0030] Therefore, for example, in the portion where the insertion hole 2c of the outer ring 2 is formed, the outer ring mounting groove 7 and the outer ring insertion groove 8 are partially formed in the portion 2e on the opposite side sandwiching the insertion hole 2c. Specifically, since bearing balls 4 having a diameter of about 25 mm to 29 mm are inserted from the insertion hole 2c, the diameter of the insertion hole 2c is set to about 32 mm. Since the thickness of the outer ring 2 is about 42 mm, for example, the thicknesses of the two portions 2e are each about 5 mm. Since the widths of the outer ring mounting groove 7 and the outer ring insertion groove 8 are about 2 mm to 2.5 mm, the outer ring mounting groove 7 and the outer ring insertion groove 8 can be formed while maintaining sufficient rigidity of the portion 2e.

[0031] The outer ring mounting groove 7 is formed by two opposing surfaces 7a facing each other in the thickness direction of the outer ring 2 and a bottom surface 7b continuous with the edge on the inner side of the two opposing surfaces 7a.

[0032] The outer ring insertion groove 8 is also formed in the same shape as the outer ring mounting groove 7. In the thickness direction of the outer ring 2, of the two opposing surfaces, the surface on the side opposite to the spherical portion recess 5 is formed as the outer ring side outer surface 8a, and the surface on the side of the spherical portion recess 5 is formed as the outer ring side inner surface 8b. The bottom surface 8c is continuous with the rear edges of the outer ring side outer surface 8a and the outer ring side inner surface 8b.

[0033] A plurality of mounting holes 3a penetrating in the thickness direction are formed in the inner ring 3 at equal intervals in the circumferential direction (see FIGS. 2 and 3). The inner ring 3 is attached to the main body 101 by inserting a fixture such as a mounting bolt into the mounting holes 3a.

[0034] A spherical portion recess 9 is formed on the outer peripheral surface of the inner ring 3. The spherical portion recess 9 extends in the circumferential direction and is formed in an annular shape (see FIG. 3). A filling groove 9a communicating with the spherical portion recess 9 and filled with grease is formed in the inner ring 3. The filling groove 9a communicates with the central portion of the spherical portion recess 9 in the thickness direction of the inner ring 3.

[0035] An inner ring mounting groove 10 and an inner ring insertion groove 11, both of which function as inner ring grooves, are formed on opposite sides of the inner ring 3 sandwiching the spherical portion recess 9. Both the inner ring mounting groove 10 and the inner ring insertion groove 11 are open to the outer peripheral surface of the inner ring 3 and are formed in an annular shape. The inner ring mounting groove 10 is formed at the other end in the thickness direction of the inner ring 3, and the inner ring insertion groove 11 is formed at one end in the thickness direction of the inner ring 3.

[0036] The inner ring mounting groove 10 is formed by two opposing surfaces 10a opposing each other in the thickness direction of the inner ring 3 and a bottom surface 10b continuous with the rear edges of the two opposing surfaces 10a.

[0037] The inner ring insertion groove 11 is also formed in the same shape as the inner ring mounting groove 10. In the thickness direction of the inner ring 3, of the two opposing surfaces, the surface on the side opposite to the spherical portion recess 9 is formed as the inner ring side outer surface 11a, and the surface on the side of the spherical portion recess 9 is formed as the inner ring side inner surface 11b. The bottom surface 11c is continuous with the rear edges of the inner ring side outer surface 11a and the inner ring side inner surface 11b.

[0038] In a state where the inner ring 3 is positioned inside the outer ring 2, a placement space 12 is formed by the ball placement recess 5 of the outer ring 2 and the ball placement recess 9 of the inner ring 3.

[0039] In a state where the inner ring 3 is positioned inside the outer ring 2, a plurality of bearing balls 4 are sequentially inserted into the placement space 12 from the insertion hole 2c of the outer ring 2. When all the bearing balls 4 are inserted into the placement space 12, the insertion hole 2c is closed by a plug 13. A press-fitting hole 13a is formed in the plug 13. In a state where the insertion hole 2c is closed by the plug 13, a taper pin 14 is press-fitted across the fixing hole 2b of the outer ring 2 and the press-fitting hole 13a of the plug 13, and the plug 13 is fixed to the outer ring 2 to prevent the bearing balls 4 from falling out of the insertion hole 2c.

[0040] In addition, when a spacer is inserted into the placement space 12 in addition to the bearing balls 4, the bearing balls 4 and the spacer are inserted into the placement space 12 from the insertion hole 2c.

[0041] In the state where the inner ring 3 is positioned inside the outer ring 2 as described above, the outer ring mounting groove 7 formed in the outer ring 2 and the inner ring insertion groove 11 formed in the inner ring 3 are positioned facing each other, and the outer ring insertion groove 8 formed in the outer ring 2 and the inner ring mounting groove 10 formed in the inner ring 3 are positioned facing each other.

[0042] An annular first seal member 15 that can be elastically deformed is attached to the outer ring 2 (see FIGS. 3 and 4). As the first seal member 15, for example, chloroprene rubber or nitrile rubber is used. Approximately half of the outer peripheral side of the first seal member 15 is provided as a first attached portion 16, and a portion on the inner peripheral side of the first attached portion 16 is provided as a first inserted portion 17. The first attached portion 16 is attached to the outer ring 2 by adhesion or press-fitting in a state of being inserted into the outer ring mounting groove 7. The first attached portion 16 and the first inserted portion 17 are integrally formed.

[0043] The first attachment portion 16 is formed with a substantially rectangular cross-sectional shape cut in the radial direction, and uneven portions 16a are formed on one surface in the thickness direction of the first attachment portion 16. By forming the uneven portions 16a, when the first attachment portion 16 is inserted into the outer ring mounting groove 7, the uneven portions 16a are crushed, the contact pressure against the outer ring mounting groove 7 increases, and a sufficient contact area is obtained, ensuring a good mounting state of the first seal member 15 to the outer ring 2.

[0044] The first insertion portion 17 is bent in the thickness direction with respect to the first attachment portion 16 and is elastically deformable with respect to the first attachment portion 16. The first insertion portion 17 is formed in a shape such that its thickness decreases as it separates from the first attachment portion 16, and has a first contact surface 17a at its tip.

[0045] At the boundary between the first attachment portion 16 and the first insertion portion 17, one surface in the thickness direction is formed as a convex curved surface 18, and the other surface in the thickness direction is formed as a concave curved surface 19. By forming the convex curved surface 18 and the concave curved surface 19 at the boundary between the first attachment portion 16 and the first insertion portion 17, stress concentration hardly occurs at the boundary between the first attachment portion 16 and the first insertion portion 17, cracks at the boundary when the first insertion portion 17 is elastically deformed with respect to the first attachment portion 16 are prevented, and a stable bent state of the first insertion portion 17 with respect to the first attachment portion 16 is ensured.

[0046] An elastically deformable annular second seal member 20 is attached to the inner ring 3 (see FIGS. 3 and 5). As the second seal member 20, for example, chloroprene rubber or nitrile rubber is used. The second seal member 20 is formed in the same shape as the first seal member 15. Approximately half of the inner peripheral side is provided as a second attachment portion 21, and the portion on the outer peripheral side from the second attachment portion 21 is provided as a second insertion portion 22. The second attachment portion 21 is attached to the inner ring 3 by adhesion or press-fitting in a state where it is inserted into the inner ring mounting groove 10. The second attachment portion 21 and the second insertion portion 22 are integrally formed.

[0047] The second attached portion 21 has uneven portions 21a formed on one surface in the thickness direction. By forming the uneven portions 21a, when the second attached portion 21 is inserted into the inner ring mounting groove 10, the uneven portions 21a are crushed, the contact pressure against the inner ring mounting groove 10 increases, and a sufficient contact area is obtained, ensuring a good mounting state of the second seal member 20 to the inner ring 3.

[0048] The second inserted portion 22 is bent in the thickness direction with respect to the second attached portion 21 and is elastically deformable with respect to the second attached portion 21. The second inserted portion 22 is formed in a shape such that its thickness decreases as it separates from the second attached portion 21 and has a second contact surface 22a at its tip.

[0049] At the boundary portion between the second attached portion 21 and the second inserted portion 22, one surface in the thickness direction is formed as a convex curved surface 23, and the other surface in the thickness direction is formed as a concave curved surface 24. By forming the convex curved surface 23 and the concave curved surface 24 at the boundary portion between the second attached portion 21 and the second inserted portion 22, stress concentration hardly occurs at the boundary portion, cracks at the boundary portion when the second inserted portion 22 is elastically deformed with respect to the second attached portion 21 are prevented, and a stable bent state of the second inserted portion 22 with respect to the second attached portion 21 is ensured.

[0050] The first seal member 15 is attached to the outer ring 2, for example, in a state where the first inserted portion 17 is bent in the thickness direction on the side opposite to the arrangement space 12 with respect to the first attached portion 16, and the first inserted portion 17 is inserted into the inner ring insertion groove 11 of the inner ring 3 (see FIG. 3). At this time, since the first inserted portion 17 is bent on the side opposite to the arrangement space 12, for example, the first contact surface 17a is in surface contact with the inner ring side outer surface 11a of the inner ring insertion groove 11 in a state of being pressed against it. However, it is only necessary that the first inserted portion 17 is inserted into the inner ring insertion groove 11, and it does not have to be in contact with any surface forming the inner ring insertion groove 11.

[0051] On one hand, for example, the second seal member 20 is attached to the inner ring 3 in a state where the second inserted portion 22 is bent in the thickness direction with respect to the second attachment portion 21 on the side opposite to the arrangement space 12, and the second inserted portion 22 is inserted into the outer ring insertion groove 8 of the outer ring 2. At this time, since the second inserted portion 22 is bent on the side opposite to the arrangement space 12, for example, the second contact surface 22a is in surface contact with the outer surface 8a on the outer ring side of the outer ring insertion groove 8 in a state of being pressed against it. However, it is only necessary that the second inserted portion 22 is inserted into the outer ring insertion groove 8, and it does not have to be in contact with any surface forming the outer ring insertion groove 8.

[0052] There are gaps 25 communicating with the arrangement space 12 on the opposite sides sandwiching the arrangement space 12 between the outer ring 2 and the inner ring 3. However, the gaps 25 are closed when the first inserted portion 17 of the first seal member 15 attached to the outer ring 2 is inserted into the inner ring insertion groove 11 of the inner ring 3 and the second inserted portion 22 of the second seal member 20 attached to the inner ring 3 is inserted into the outer ring insertion groove 8 of the outer ring 2. Therefore, the intrusion of moisture, oil, dust, etc. from the gaps 25 into the arrangement space 12 is prevented.

[0053] The bearing device 1 configured as described above is assembled, for example, in a state where the outer ring 2 is placed on a workbench or the like, the inner ring 3 is inserted into the inside of the outer ring 2 from above, the bearing balls 4 are inserted into the arrangement space 12 through the insertion hole 2c, and grease is filled through the grease filling hole. The grease is filled into the filling grooves 5a and 9a and also adheres to the surface of the bearing balls 4 in the arrangement space 12.

[0054] When the inner ring 3 is inserted into the inside of the outer ring 2, the first seal member 15 is attached to the outer ring 2 and the second seal member 20 is attached to the inner ring 3 (see FIG. 6). Therefore, when the inner ring 3 is inserted into the inside of the outer ring 2, the first seal member 15 attached to the outer ring 2 slides on the outer peripheral surface of the inner ring 3 and the first inserted portion 17 is elastically deformed, and the second seal member 20 attached to the inner ring 3 slides on the inner peripheral surface of the outer ring 2 and the second inserted portion 22 is elastically deformed (see FIG. 7).

[0055] When such a first seal member 15 is slid on the outer peripheral surface of the inner ring 3 and the second seal member 20 is slid on the inner peripheral surface of the outer ring 2, it becomes a load when the inner ring 3 is inserted inside the outer ring 2. However, the bending directions of the first inserted portion 17 and the second inserted portion 22 are in the direction with less load.

[0056] Therefore, in the first seal member 15, the first inserted portion 17 is bent in a direction away from the arrangement space 12 with respect to the first attached portion 16, and in the second seal member 20, the second inserted portion 22 is bent in a direction away from the arrangement space 12 with respect to the second attached portion 21, whereby the bearing device 1 can be easily assembled.

[0057] In addition, the bearing device 1 can also be assembled by arranging the outer ring 2 outside the inner ring 3 from above and inserting the bearing balls 4 into the arrangement space 12 through the insertion hole 2c and filling grease from the grease filling hole in a state where the inner ring 3 is placed on a workbench or the like.

[0058] Also, in the bearing device 1, the bearing device 1 can be disassembled by separating the outer ring 2 and the inner ring 3 in a state where all the bearing balls 4 are taken out from the insertion hole 2c. By disassembling the bearing device 1 in this way, maintenance can be performed.

[0059] <Operation of the bearing device> Subsequently, the operation of the bearing device 1 will be described.

[0060] When the main body 101 that functions as a movable part in the crusher 100 is rotated (swiveled) with respect to the bracket 102 that functions as a fixed part, the inner ring 3 that functions as a rotating ring rotates with respect to the outer ring 2 that functions as a fixed ring as the main body 101 rotates.

[0061] When the inner ring 3 rotates, the bearing balls 4 rotate while rolling with respect to the outer ring 2 and the inner ring 3 in the arrangement space 12. At this time, the grease pressure is applied to the first sealing member 15 and the second sealing member 20 from the arrangement space 12 side, and the first contact surface 17a of the first inserted portion 17 is pressed against the inner ring side outer surface 11a of the inner ring insertion groove 11 by the applied pressure, and the state where the first contact surface 17a is pressed against the inner ring side outer surface 11a is maintained. The state where the second contact surface 22a of the second inserted portion 22 is pressed against the outer ring side outer surface 8a of the outer ring insertion groove 8 by the applied pressure is maintained.

[0062] In addition, when a large pressure such as outside air or moisture is applied to the first inserted portion 17 and the second inserted portion 22 from the outside, the first inserted portion 17 is pressed against the inner ring side inner surface 11b of the inner ring insertion groove 11 and the second inserted portion 22 is pressed against the outer ring side inner surface 8b of the outer ring insertion groove 8, thereby ensuring the sealing performance between the outer ring 2 and the inner ring 3.

[0063] Also, even when the first inserted portion 17 is not in contact with any of the surfaces forming the inner ring insertion groove 11, the first contact surface 17a of the first inserted portion 17 is pressed against the inner ring side outer surface 11a by the grease pressure, and the second contact surface 22a of the second inserted portion 22 is pressed against the outer ring side outer surface 8a.

[0064] In addition, the grease pressure is applied to the first inserted portion 17 and the second inserted portion 22 both when the inner ring 3 rotates with respect to the outer ring 2 and when it does not rotate.

[0065] <Other configurations of the bearing device> In the above, an example is shown in which in the first sealing member 15, the first inserted portion 17 is bent in a direction away from the first mounting portion 16 from the arrangement space 12, and in the second sealing member 20, the second inserted portion 22 is bent in a direction away from the second mounting portion 21 from the arrangement space 12. Conversely, it is also possible to adopt a configuration in which the first inserted portion 17 is bent in a direction approaching the arrangement space 12 with respect to the first mounting portion 16, and the second inserted portion 22 is bent in a direction approaching the arrangement space 12 with respect to the second mounting portion 21 (see FIG. 8).

[0066] By bending the first inserted portion 17 and the second inserted portion 22 in such a direction, the loads due to the sliding of the first seal member 15 on the inner ring 3 and the sliding of the second seal member 20 on the outer ring 2 when the outer ring 2 and the inner ring 3 are separated are small, and the bearing device 1 can be easily disassembled.

[0067] In addition, in the configuration in which the first inserted portion 17 and the second inserted portion 22 are bent in a direction approaching the arrangement space 12, when pressure such as outside air and moisture is applied to the first inserted portion 17 and the second inserted portion 22 from the outside, the first contact surface 17a of the first inserted portion 17 is pressed against the inner ring side inner surface 11b of the inner ring insertion groove 11, and the second contact surface 22a of the second inserted portion 22 is pressed against the outer ring side inner surface 8b of the outer ring insertion groove 8.

[0068] Therefore, a high sealing performance between the outer ring 2 and the inner ring 3 can be ensured.

[0069] Also, when a large pressure of grease is applied to the first inserted portion 17 and the second inserted portion 22 from the arrangement space 12 side, the first inserted portion 17 is pressed against the inner ring side outer surface 11a of the inner ring insertion groove 11, and the second inserted portion 22 is pressed against the outer ring side outer surface 8a of the outer ring insertion groove 8, thereby ensuring the sealing performance between the outer ring 2 and the inner ring 3.

[0070] In addition, as described above, in the configuration in which the first seal member 15 is attached to the outer ring 2 and the second seal member 20 is attached to the inner ring 3, the first inserted portion 17 may be bent in a direction away from the arrangement space 12 with respect to the first attached portion 16, and the second inserted portion 22 may be bent in a direction approaching the arrangement space 12 with respect to the second attached portion 21 (see FIG. 9).

[0071] Further, in a configuration where the first seal member 15 is attached to the outer ring 2 and the second seal member 20 is attached to the inner ring 3, the first inserted portion 17 may be bent in a direction approaching the arrangement space 12 with respect to the first attached portion 16, and the second inserted portion 22 may be bent in a direction away from the arrangement space 12 with respect to the second attached portion 21 (see FIG. 10).

[0072] Furthermore, in the bearing device 1, the first seal member 15 may be attached to the inner ring 3, and the second seal member 20 may be attached to the outer ring 2. Also in this case, the bending direction of the first inserted portion 17 with respect to the first attached portion 16 and the bending direction of the second inserted portion 22 with respect to the second attached portion 21 may be a direction away from the arrangement space 12 or a direction approaching the arrangement space 12.

[0073] <Summary> As described above, in the bearing device 1, the first seal member 15 that can be elastically deformed and the second seal member 20 that can be elastically deformed are positioned on opposite sides across the arrangement space 12. The first seal member 15 is provided with a first attached portion 16 that is attached in a state of being inserted into the outer ring attachment groove 7 or the inner ring attachment groove 10, and a first inserted portion 17 that is inserted into the inner ring insertion groove 11 or the outer ring insertion groove 8. The second seal member 20 is provided with a second attached portion 21 that is attached in a state of being inserted into the outer ring attachment groove 7 or the inner ring attachment groove 10, and a second inserted portion 22 that is inserted into the inner ring insertion groove 11 or the outer ring insertion groove 8.

[0074] Therefore, each part of the first seal member 15 and each part of the second seal member 20 are inserted into the outer ring groove and the inner ring groove positioned on opposite sides across the arrangement space 12. As a result, since the arrangement spaces of the first seal member 15 and the second seal member 20 do not exist on the outer surface side in the thickness direction of the outer ring 2 and the inner ring 3, it is possible to achieve miniaturization while ensuring high sealing performance between the outer ring 2 and the inner ring 3.

[0075] Further, with the first attached part 16 being attached in a state of being inserted into the outer ring attachment groove 7 and the first inserted part 17 being inserted into the inner ring insertion groove 11, and the second attached part 21 being attached in a state of being inserted into the inner ring attachment groove 10 and the second inserted part 22 being inserted into the outer ring insertion groove 8, the first seal member 15 is attached to the outer ring 2 and the second seal member 20 is attached to the inner ring 3.

[0076] Therefore, since the first inserted part 17 of the first seal member 15 is inserted into the inner ring 3 and the second inserted part 22 of the second seal member 20 is inserted into the outer ring 2, a good balance is ensured in the arrangement state of the first seal member 15 and the second seal member 20 with respect to the outer ring 2 and the inner ring 3, and after ensuring a stable rotational operation in the bearing device 1, a high sealing property between the outer ring 2 and the inner ring 3 can be ensured.

[0077] Furthermore, since the first inserted part 17 is brought into close contact with the outer surface 11a or the inner surface 11b on the inner ring side, and the second inserted part 22 is brought into close contact with the outer surface 8a or the inner surface 8b on the outer ring side, the arrangement space 12 is sealed, so that a high sealing property between the outer ring 2 and the inner ring 3 can be ensured.

[0078] In particular, in the case of a configuration in which the first inserted part 17 of the first seal member 15 is bent in a direction away from the arrangement space 12 with respect to the first attached part 16, and the second inserted part 22 of the second seal member 20 is bent in a direction away from the arrangement space 12 with respect to the second attached part 21, the first inserted part 17 is brought into close contact with the outer surface 11a on the inner ring side, and the second inserted part 22 is brought into close contact with the outer surface 8a on the outer ring side.

[0079] In such a configuration, since the pressure of the grease filled in the arrangement space 12 is applied to the first inserted part 17 and the second inserted part 22 from the arrangement space 12 side in a state where the first inserted part 17 is in close contact with the outer surface 11a on the inner ring side and the second inserted part 22 is in close contact with the outer surface 8a on the outer ring side, a gap is less likely to occur in the inner ring insertion groove 11 and the outer ring insertion groove 8, and an even higher sealing property between the outer ring 2 and the inner ring 3 can be ensured.

[0080] On one hand, the first inserted portion 17 is bent in a direction approaching the arrangement space 12 with respect to the first attached portion 16, the second inserted portion 22 is bent in a direction approaching the arrangement space 12 with respect to the second attached portion 21, the first inserted portion 17 is brought into close contact with the inner ring side inner surface 11b, and the second inserted portion 22 is brought into close contact with the outer ring side inner surface 8b. There may also be a configuration where this occurs.

[0081] In the case of such a configuration, when external pressure is applied to the first inserted portion 17 and the second inserted portion 22 in a state where the first inserted portion 17 is in close contact with the inner ring side inner surface 11b and the second inserted portion 22 is in close contact with the outer ring side inner surface 8b, it is difficult for a gap to occur in the inner ring insertion groove 11 and the outer ring insertion groove 8, and a higher sealing property between the outer ring 2 and the inner ring 3 can be ensured.

[0082] Also, the outer surfaces 2X, 2Y on both sides in the thickness direction of the outer ring 2 and the outer surfaces 3X, 3Y on both sides in the thickness direction of the inner ring 3 are located on the same plane respectively.

[0083] Therefore, since the thicknesses of the outer ring 2 and the inner ring 3 are made the same and the outer surfaces 2X, 2Y and the outer surfaces 3X, 3Y exist on the same plane respectively, the outer ring 2 and the inner ring 3 do not have a shape in which one protrudes in the thickness direction with respect to the other, and the thinning of the bearing device 1 can be achieved.

[0084] Furthermore, since the outer ring 2 and the inner ring 3 do not have a shape in which one protrudes in the thickness direction with respect to the other and thinning is achieved, the weight reduction of the bearing device 1 can also be achieved.

[0085] Furthermore, the first seal member 15 is formed in a shape such that its thickness decreases as the first inserted portion 17 separates from the first attached portion 16, and the second seal member 20 is formed in a shape such that its thickness decreases as the second inserted portion 22 separates from the second attached portion 21.

[0086] Therefore, since the first inserted portion 17 is easily deformable with respect to the first attached portion 16 and the second inserted portion 22 is easily deformable with respect to the second attached portion 21, the loads applied to the inner ring 3 and the outer ring 2 from the first inserted portion 17 and the second inserted portion 22 respectively during the assembly and disassembly of the outer ring 2 and the inner ring 3 are small, and the assembly and disassembly of the outer ring 2 and the inner ring 3 can be easily performed.

[0087] In addition, a first contact surface 17a that is in surface contact with the outer surface 11a or the inner surface 11b on the inner ring side is formed on the first inserted portion 17, and a second contact surface 22a that is in surface contact with the outer surface 8a or the inner surface 8b on the outer ring side is formed on the second inserted portion 22.

[0088] Therefore, since the first inserted portion 17 is in surface contact with the outer surface 11a or the inner surface 11b on the inner ring side and the second inserted portion 22 is in surface contact with the outer surface 8a or the inner surface 8b on the outer ring side, the contact areas of the first inserted portion 17 and the second inserted portion 22 with respect to the inner ring 3 and the outer ring 2 respectively become large, and a higher sealing property between the outer ring 2 and the inner ring 3 can be ensured.

[0089] <Other modification examples, etc.> Hereinafter, other modification examples, etc. will be described (see FIGS. 11 to 14).

[0090] In the bearing device 1, outer ring mounting grooves 7 may be formed on opposite sides of the outer ring 2 with the arrangement space 12 interposed therebetween, inner ring insertion grooves 11 may be formed on opposite sides of the inner ring 3 with the arrangement space 12 interposed therebetween, and a first sealing member 15 and a second sealing member 20 may be attached to the outer ring 2, and a first inserted portion 17 and a second inserted portion 22 may be inserted into the inner ring insertion grooves 11 respectively (see FIGS. 11 and 12).

[0091] In this case, the first inserted portion 17 and the second inserted portion 22 may each be bent in a direction away from the placement space 12 with respect to the first attached portion 16 and the second attached portion 21 (see FIG. 11), or the first inserted portion 17 and the second inserted portion 22 may each be bent in a direction approaching the placement space 12 with respect to the first attached portion 16 and the second attached portion 21 (see FIG. 12).

[0092] In the configuration where the first inserted portion 17 and the second inserted portion 22 are each bent in a direction away from the placement space 12 with respect to the first attached portion 16 and the second attached portion 21, the first inserted portion 17 and the second inserted portion 22 are easily pressed against the surfaces forming the inner ring insertion groove 11 by the grease pressure from the placement space 12 side.

[0093] On the other hand, in the configuration where the first inserted portion 17 and the second inserted portion 22 are each bent in a direction approaching the placement space 12 with respect to the first attached portion 16 and the second attached portion 21, the first inserted portion 17 and the second inserted portion 22 are easily pressed against the surfaces forming the inner ring insertion groove 11 by the pressure of outside air, moisture, etc. from the outside.

[0094] Also, in the bearing device 1, inner ring mounting grooves 10 may be formed on the opposite sides of the inner ring 3 sandwiching the placement space 12, outer ring insertion grooves 8 may be formed on the opposite sides of the outer ring 2 sandwiching the placement space 12, and the first seal member 15 and the second seal member 20 may be attached to the inner ring 3 and the first inserted portion 17 and the second inserted portion 22 may be inserted into the outer ring insertion grooves 8, respectively.

[0095] Also in this case, the first inserted portion 17 and the second inserted portion 22 may each be bent in a direction away from the placement space 12 with respect to the first attached portion 16 and the second attached portion 21, or the first inserted portion 17 and the second inserted portion 22 may each be bent in a direction approaching the placement space 12 with respect to the first attached portion 16 and the second attached portion 21.

[0096] In a configuration where the first inserted portion 17 and the second inserted portion 22 are each bent in a direction away from the placement space 12 with respect to the first attached portion 16 and the second attached portion 21, the grease pressure from the placement space 12 side makes it easier for the first inserted portion 17 and the second inserted portion 22 to be pressed against the surfaces forming the outer ring insertion groove 8, respectively.

[0097] On the other hand, in a configuration where the first inserted portion 17 and the second inserted portion 22 are each bent in a direction approaching the placement space 12 with respect to the first attached portion 16 and the second attached portion 21, the pressure of outside air, moisture, etc. from the outside makes it easier for the first inserted portion 17 and the second inserted portion 22 to be pressed against the surfaces forming the outer ring insertion groove 8, respectively.

[0098] In addition, in a configuration where both the first seal member 15 and the second seal member 20 are attached to one of the outer ring 2 or the inner ring 3 as described above, the first inserted portion 17 may be bent in a direction away from the placement space 12 with respect to the first attached portion 16, and the second inserted portion 22 may be bent in a direction approaching the placement space 12 with respect to the second attached portion 21.

[0099] Also, in a configuration where both the first seal member 15 and the second seal member 20 are attached to one of the outer ring 2 or the inner ring 3, the first inserted portion 17 may be bent in a direction approaching the placement space 12 with respect to the first attached portion 16, and the second inserted portion 22 may be bent in a direction away from the placement space 12 with respect to the second attached portion 21.

[0100] In the above, an example was shown in which the first seal member 15 has the first inserted portion 17 bent with respect to the first attached portion 16, and the second seal member 20 has the second inserted portion 22 bent with respect to the second attached portion 21. However, instead of the first seal member 15 and the second seal member 20, the first seal member 15A, the second seal member 20A, the first seal member 15B, and the second seal member 20B having the following shapes may be used (see FIGS. 13 and 14).

[0101] Since the first seal member 15A and the second seal member 20A have the same shape, and the first seal member 15B and the second seal member 20B have the same shape, the first seal member 15A and the first seal member 15B will be described as examples below. Since only the shape of the first inserted portion of the first seal member 15A and the first seal member 15B is different from that of the first seal member 15, the shape of the first inserted portion will be mainly described in detail below.

[0102] The first seal member 15A is formed by integrally forming a first attachment portion 16 and a first inserted portion 17A (see FIG. 13).

[0103] The first inserted portion 17A has a bifurcated cross-sectional shape formed by cutting in the radial direction and is elastically deformable with respect to the first attachment portion 16. The first inserted portion 17A is formed in an overall lying V shape and has a pair of sealing portions 26 that separate from each other as they separate from the first attachment portion 16. The sealing portion 26 is formed in a shape in which the thickness decreases as it separates from the first attachment portion 16 and has a first contact surface 26a at the tip.

[0104] Both surfaces in the thickness direction of the boundary portion between the first attachment portion 16 and the first inserted portion 17A are formed as concave curved surfaces 27. By forming the concave curved surface 27 at the boundary portion between the first attachment portion 16 and the first inserted portion 17A, stress concentration is less likely to occur at the boundary portion between the first attachment portion 16 and the first inserted portion 17A, cracks at the boundary portion when the first inserted portion 17A is elastically deformed with respect to the first attachment portion 16 are prevented, and a stable bent state of the first inserted portion 17A with respect to the first attachment portion 16 is ensured.

[0105] The first seal member 15A is attached to the outer ring 2, for example, and the first inserted portion 17A is inserted into the inner ring insertion groove 11 of the inner ring 3, for example, and the two first contact surfaces 26a are in surface contact with the outer surface 11a and the inner surface 11b on the inner ring side of the inner ring insertion groove 11, respectively, being pressed against them.

[0106] Thus, since the sealing portions 26 of the first inserted portion 17A of the first seal member 15A are pressed against the outer surface 11a and the inner surface 11b on the inner ring side, respectively, a high sealing performance between the outer ring 2 and the inner ring 3 can be ensured.

[0107] The first seal member 15B is formed by integrally forming the first attached portion 16 and the first inserted portion 17B (see FIG. 14).

[0108] The first inserted portion 17B is not bent with respect to the first attached portion 16. The first inserted portion 17B is composed of a connecting portion 28 having a substantially rectangular cross-sectional shape cut in the radial direction and a sealing portion 29 having a substantially circular shape, and is elastically deformable with respect to the first attached portion 16. One end of the connecting portion 28 is continuous with the first attached portion 16 and the other end is continuous with the sealing portion 29. The diameter of the sealing portion 29 is made larger than the width in the thickness direction of the connecting portion 28, and is, for example, slightly smaller than the width of the inner ring insertion groove 11 of the inner ring 3.

[0109] The first seal member 15B is attached to the outer ring 2, for example, and the first inserted portion 17B is inserted into the inner ring insertion groove 11. At this time, since the diameter of the sealing portion 29 is slightly smaller than the width of the inner ring insertion groove 11, a slight gap may be formed between the sealing portion 29 and the outer surface 11a on the inner ring side and between the sealing portion 29 and the inner surface 11b on the inner ring side.

[0110] In a state where the first inserted portion 17B is inserted into the inner ring insertion groove 11, grease pressure is applied to the first inserted portion 17B from the side of the arrangement space 12, and pressure of outside air, moisture, etc. from the outside is also applied. At this time, when the grease pressure is larger than the external pressure, a part of the sealing portion 29 is pressed against the outer surface 11a on the inner ring side of the inner ring insertion groove 11 and the arrangement space 12 is sealed, and when the external pressure is larger than the grease pressure, the other part of the sealing portion 29 is pressed against the inner surface 11b on the inner ring side of the inner ring insertion groove 11 and the arrangement space 12 is sealed.

[0111] Thus, since the first seal member 15B is pressed against the outer surface 11a or the inner surface 11b on the inner ring side by the pressure applied to the sealing portion 29 of the first inserted portion 17B, high sealing performance between the outer ring 2 and the inner ring 3 can be ensured.

[0112] <Others> In the above, an example in which the first seal members 15 (the first seal member 15A and the first seal member 15B) and the second seal members 20 (the second seal member 20A and the second seal member 20B) are respectively positioned on the opposite sides sandwiching the arrangement space 12 is shown. However, a plurality of first seal members 15 and a plurality of second seal members 20 may be positioned on the opposite sides sandwiching the arrangement space 12.

[0113] Also, only one of the opposite sides sandwiching the arrangement space 12 may have the first seal member 15 (the first seal member 15A and the first seal member 15B) or the second seal member 20 (the second seal member 20A and the second seal member 20B) positioned thereon.

[0114] According to such a configuration, each part of the seal member is inserted into the outer ring groove and the inner ring groove, and since the arrangement space of the seal member does not exist on the outer surface side in the thickness direction of the outer ring 2 and the inner ring 3, miniaturization can be achieved while ensuring high sealing performance between the outer ring 2 and the inner ring 3.

[0115] In addition, in such a configuration, on the side where no seal member is arranged among the opposite sides sandwiching the arrangement space 12, a seal structure in which a part of the seal member as described in the above Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2008 - 303643) is pressed against the outer surface of the inner ring or the outer ring may be provided. However, a known seal structure other than the seal structure described in Patent Document 1 may be provided as the seal structure provided on the side where no seal member is arranged.

[0116] By using different seal structures including the seal structure according to the present invention in this way, it is possible to achieve miniaturization of the bearing device 1, ensure high sealing performance between the outer ring 2 and the inner ring 3, and increase the degree of freedom in design.

[0117] Furthermore, after the first seal members 15 (first seal members 15A and 15B) and the second seal members 20 (second seal members 20A and 20B) are positioned one by one on the opposite sides sandwiching the arrangement space 12, a structure may be provided in which a part of the seal member as described in Patent Document 1 is pressed against the outer surface of the inner ring or the outer ring on one or both of the opposite sides sandwiching the arrangement space 12.

Explanation of Signs

[0118] 100 Crusher (structure) 101 Main body (movable part) 102 Bracket (fixed part) 1 Bearing device 2 Outer ring 3 Inner ring 4 Bearing ball 7 Outer ring mounting groove (outer ring groove) 8 Outer ring insertion groove (outer ring groove) 8a Outer ring side outer surface 8b Outer ring side inner surface 10 Inner ring mounting groove (inner ring groove) 11 Inner ring insertion groove (inner ring groove) 11a Inner ring side outer surface 11b Inner ring side inner surface 12 Arrangement space 15 First seal member 16 First attached part 17 First inserted part 20 Second seal member 21 Second attached part 22 Second inserted part 15A First seal member 16 First attached part 17A First inserted part 15B First seal member 16 First attached part 17B First inserted part

Claims

1. It is used for a structure in which a movable part rotates with respect to a fixed part, and one of an outer ring and an inner ring is attached to the fixed part as a fixed ring and the other is attached to the movable part as a rotating ring, and a plurality of bearing balls are arranged between the outer ring and the inner ring to form an arrangement space. A bearing device, The axial direction of the rotation axis of the outer ring and the inner ring is the thickness direction, At least one annular outer ring groove opened toward the inner ring side is formed on each of the opposite sides of the outer ring sandwiching the arrangement space in the thickness direction, At least one annular inner ring groove opened toward the outer ring side is formed on each of the opposite sides of the inner ring sandwiching the arrangement space in the thickness direction, At least one elastic deformable annular first seal member and at least one elastic deformable annular second seal member are respectively positioned on opposite sides sandwiching the arrangement space in the thickness direction, The first seal member is provided with a first attached portion attached in a state of being inserted into the outer ring groove or the inner ring groove and a first inserted portion inserted into the inner ring groove or the outer ring groove, The second seal member is provided with a second attached portion attached in a state of being inserted into the outer ring groove or the inner ring groove and a second inserted portion inserted into the inner ring groove or the outer ring groove, The inner ring groove or the outer ring groove into which the first inserted portion and the second inserted portion are respectively inserted is opened only on the outer peripheral surface of the inner ring or only on the inner peripheral surface of the outer ring, It has two parallel surfaces that face each other in the thickness direction as the surfaces forming the inner ring groove or the outer ring groove into which the first inserted portion and the second inserted portion are respectively inserted, and the dimensions in the depth direction of the groove are made the same, It has two parallel surfaces that face each other in the thickness direction as the surfaces forming the outer ring groove or the inner ring groove into which the first attached portion and the second attached portion are respectively inserted, and the dimensions in the depth direction of the groove are made the same, The first seal member and the second seal member are positioned inside the outer surface in the thickness direction of the outer ring and the outer surface in the thickness direction of the inner ring, The first inserted portion is formed in a shape in which the thickness decreases as it separates from the first attached portion, The first inserted portion is bent in the thickness direction with respect to the first attached portion and is elastically deformable with respect to the first attached portion, On one surface of the first attachment part in the thickness direction, there are formed uneven portions that are crushed in contact with one of the parallel surfaces when inserted into the outer ring groove or the inner ring groove. The direction in which the concave and convex portions of the uneven portions formed in the first attachment part are arranged is in the radial direction of the first seal member. One surface of the boundary portion between the first attachment part and the first insertion part is formed as a convex curved surface in the thickness direction, and the other surface in the thickness direction is formed as a concave curved surface. The second insertion part is formed in a shape such that its thickness decreases as it separates from the second attachment part. The second insertion part is bent in the thickness direction with respect to the second attachment part and is elastically deformable with respect to the second attachment part. On one surface of the second attachment part in the thickness direction, there are formed uneven portions that are crushed in contact with one of the parallel surfaces when inserted into the inner ring groove or the outer ring groove. The direction in which the concave and convex portions of the uneven portions formed in the second attachment part are arranged is in the radial direction of the second seal member. One surface of the boundary portion between the second attachment part and the second insertion part is formed as a convex curved surface in the thickness direction, and the other surface in the thickness direction is formed as a concave curved surface. The first insertion part is brought into close contact with one of the parallel surfaces forming the inner ring groove or the outer ring groove. The second insertion part is brought into close contact with one of the parallel surfaces forming the inner ring groove or the outer ring groove Bearing device.

2. The first seal member is attached in a state where the first attachment part is inserted into the outer ring groove, and the first insertion part is inserted into the inner ring groove. The second seal member is attached in a state where the second attachment part is inserted into the inner ring groove, and the second insertion part is inserted into the outer ring groove The bearing device according to claim 1.

3. The outer ring groove into which the first attachment part is inserted is formed as an outer ring mounting groove. The inner ring groove into which the first insertion part is inserted is formed as an inner ring insertion groove. The inner ring groove into which the second attachment part is inserted is formed as an inner ring mounting groove. The outer ring groove into which the second insertion part is inserted is formed as an outer ring insertion groove. Of the parallel surfaces forming the outer ring insertion groove, the surface on the side opposite to the arrangement space is formed as an outer ring outer surface, and the surface on the arrangement space side is formed as an outer ring inner surface. Of the parallel surfaces forming the inner ring insertion groove, the surface on the side opposite to the arrangement space is formed as the outer surface on the inner ring side, and the surface on the arrangement space side is formed as the inner surface on the inner ring side. In the first seal member, the first inserted portion is bent in a direction away from the arrangement space with respect to the first attached portion. In the second seal member, the second inserted portion is bent in a direction away from the arrangement space with respect to the second attached portion. The first inserted portion is brought into close contact with the outer surface on the inner ring side. The second inserted portion is brought into close contact with the outer surface on the outer ring side. The bearing device according to claim 2.

4. The outer ring groove into which the first attached portion is inserted is formed as an outer ring mounting groove. The inner ring groove into which the first inserted portion is inserted is formed as an inner ring insertion groove. The inner ring groove into which the second attached portion is inserted is formed as an inner ring mounting groove. The outer ring groove into which the second inserted portion is inserted is formed as an outer ring insertion groove. Of the parallel surfaces forming the outer ring insertion groove, the surface on the side opposite to the arrangement space is formed as the outer surface on the outer ring side, and the surface on the arrangement space side is formed as the inner surface on the outer ring side. Of the parallel surfaces forming the inner ring insertion groove, the surface on the side opposite to the arrangement space is formed as the outer surface on the inner ring side, and the surface on the arrangement space side is formed as the inner surface on the inner ring side. In the first seal member, the first inserted portion is bent in a direction approaching the arrangement space with respect to the first attached portion. In the second seal member, the second inserted portion is bent in a direction approaching the arrangement space with respect to the second attached portion. The first inserted portion is brought into close contact with the inner surface on the inner ring side. The second inserted portion is brought into close contact with the inner surface on the outer ring side. The bearing device according to claim 2.

5. The outer surfaces on both sides in the thickness direction of the outer ring and the outer surfaces on both sides in the thickness direction of the inner ring are respectively positioned on the same plane. The bearing device according to claim 1, claim 2, claim 3, or claim 4.

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