JP5151698B2 - Rolling bearing device and roll device for continuous casting machine - Google Patents

Description

  The present invention relates to a rolling bearing device, and more particularly to a rolling bearing device and the like suitable for use in a drive roll and a driven roll of a continuous casting machine and a rolling roll of a rolling mill.

  The present invention also relates to a rolling bearing device that is particularly suitable if used under conditions in which all of radial load, axial load, and moment load are applied.

  Moreover, this invention relates to the roll apparatus for continuous casting machines provided with a rolling bearing apparatus.

  Conventionally, as a rolling bearing device, there is one described in JP-A-11-325062 (Patent Document 1).

  This rolling bearing device includes an outer ring, an inner ring, a plurality of cylindrical rollers, an annular spacer, a ring, and a retaining ring.

  The outer ring has a raceway surface and an annular groove on one side in the axial direction of the raceway surface, while the inner ring has a raceway surface. The plurality of cylindrical rollers are disposed at intervals in the circumferential direction between the raceway surface of the outer ring and the raceway surface of the inner ring.

  The ring is fitted in the annular groove. The ring is configured by a combination of four arc-shaped members (the length of each arc-shaped member in the circumferential direction is approximately π / 2 radians in the arc degree method). The dimension of the ring in the radial direction is larger than the depth of the annular groove. The ring protrudes inward in the radial direction from the annular groove.

  The spacer is disposed between the cylindrical roller and the ring in the axial direction of the outer ring. The spacer is in contact with both the axial end surface of the cylindrical roller and the axial end surface of the ring.

  The inner peripheral surface of the ring has an annular retaining ring mounting groove. The retaining ring mounting groove is located in the center portion in the axial direction of the ring and extends in the circumferential direction of the ring. The retaining ring is fitted in the retaining ring mounting groove of the ring.

The ring plays a role of applying an axial load transmitted from the cylindrical roller via the spacer. The retaining ring plays a role of preventing the ring from detaching from the annular groove by pressing the ring outward in the radial direction.
Japanese Patent Laid-Open No. 11-325062 (FIG. 2)

  In the rolling bearing device used for the drive roll and the driven roll of the continuous casting machine, when the ring is removed, the roll can move in the axial direction. This causes early damage of the rolling bearing device due to mixing of scales, and leakage of roll cooling water from the shaft end of the rolling bearing device. Therefore, detachment of the ring from the annular groove causes a serious situation that the emergency operation is stopped due to the early breakage or the like. Therefore, detachment of the ring from the annular groove must never occur, and detachment of the ring from the annular groove must never be prevented.

  In such a background, due to the slab moving on the roll for the continuous casting machine, when the roll or the like is tilted and a large tipping moment acts on the ring, the ring is tilted by the tipping moment, The ring is easily detached from the annular groove.

  Accordingly, an object of the present invention is to provide a rolling bearing device in which there is almost no possibility that the ring will come off the annular groove even when a complicated load such as a large overturning moment is applied to the ring.

  Another object of the present invention is to provide a roll apparatus for a continuous casting machine in which even when a complicated load such as a large overturning moment is applied to an axial load ring, the ring is unlikely to come off the annular groove. Is to provide.

In order to solve the above problems, the rolling bearing device of the present invention is
A housing having an inner peripheral surface;
A shaft member having an outer peripheral surface;
A first race member having an outer peripheral surface fitted to the inner peripheral surface of the housing and a raceway surface;
A second raceway member having an inner circumference surface fitted to the outer circumference surface of the shaft member, and a raceway surface;
A plurality of rolling elements disposed between the raceway surface of the first raceway member and the raceway surface of the second raceway member;
One member of the housing and the shaft member has an annular groove on a peripheral surface of the one member,
A plurality of arc-shaped members are arranged so as not to overlap in the axial direction at substantially the same position in the axial direction on the peripheral surface of the one member, and are substantially annular protrusions accommodated in the annular groove And a substantially annular surface radially opposite to the other of the housing and the shaft member, and an end surface on one side in the axial direction is the first track member or the second member. While the end face of the raceway member is in contact with the end face in the axial direction, the end face opposite to the one side in the axial direction of the projecting portion is in contact with the end face in the axial direction of the annular groove. With a ring,
The substantially annular surface has a threaded portion,
An annular screw member having a peripheral surface having a screw portion screwed into the screw portion ;
The substantially annular ring has a substantially annular radial positioning surface fixed to the circumferential surface of the one member by contacting a portion connected to the annular groove on the circumferential surface of the one member,
The radial positioning surface is substantially cylindrical,
The substantially annular ring is characterized by not having a screw hole for screwing a bolt .

  According to the present invention, since the annular screw member is disposed so as to be screwed into the thread portion of the substantially annular ring, a complicated load such as a tipping moment acts on the ring so that the ring moves. However, since the ring receives a force from the screw member toward the housing or the shaft member in the radial direction, the ring hardly moves. Therefore, the possibility that the substantially annular ring is disengaged from the annular groove of one of the housing and the shaft member can be greatly reduced.

Further , according to the present invention , the radial positioning of the ring can be performed by the radial positioning surface.

Further, according to the present invention , the radial positioning surface of the ring is located on the opposite side of the projecting portion from the first track member or the second track member side. Even if a tipping moment is applied from the member or the second track member, the tipping moment can be canceled out by the normal force received by the radial positioning surface from the one member, and the ring hardly tilts. Therefore, the possibility that the ring is detached from the annular groove can be greatly reduced.

In one embodiment,
The surface of the protruding portion that faces the bottom of the annular groove is located at a distance from the bottom of the annular groove, or the contact surface pressure between the protruding portion and the annular groove is Lower than the contact surface pressure between the peripheral surface of the member and the radial positioning surface.

  According to the embodiment, the surface of the protrusion that faces the bottom of the annular groove is located at a distance from the bottom of the annular groove, or the contact between the protrusion and the annular groove. Since the surface pressure is lower than the contact surface pressure between the peripheral surface of the one member and the radial positioning surface, the vertical drag that the radial positioning surface receives from the shaft member or the housing increases. Therefore, the ability to cancel the overturning moment from the first or second raceway member can be increased, and the inclination caused by the overturning moment of the ring from the first or second raceway member can be further suppressed.

In one embodiment,
At least a part of the screw member overlaps the radial positioning surface in the radial direction.

  According to the embodiment, since at least a part of the screw member overlaps the radial positioning surface in the radial direction, the circumferential positioning portion where the radial positioning surface is in contact with the radial positioning surface. The tightening force can be increased. Therefore, the inclination of the ring can be further suppressed.

  In order to increase the force with which the radial positioning surface tightens the peripheral surface portion on which the radial positioning surface is tightly fitted, a region that occupies more than half in the axial direction of the screw member has a diameter on the radial positioning surface. It is preferable to overlap in the direction.

In one embodiment,
The screw member includes a rotation preventing member that prevents the screw member from rotating relative to the substantially annular ring.

  According to the embodiment, the rotation preventing member can prevent the screw member from rotating relative to the substantially annular ring. Therefore, the screw member does not loosen with respect to the ring, and the screw member can be prevented from coming off the ring.

  Moreover, the roll apparatus for continuous casting machines of this invention is equipped with the rolling bearing apparatus of this invention, and the said shaft member is a roll which conveys a slab, It is characterized by the above-mentioned.

  According to the present invention, in a rolling bearing device having a structure in which a ring for axial load application is fitted into the annular groove, the ring can be remarkably suppressed from coming off from the annular groove, so that the reliability of the rolling bearing device is increased. The life of the rolling bearing device can be extended.

  According to the rolling bearing device of the present invention, since the annular screw member is arranged so as to be screwed into the thread portion of the substantially annular ring, a complicated load such as a falling moment acts on the ring, Even if the ring tries to move, the ring receives little force from the screw member toward the housing or the shaft member in the radial direction, so that the ring hardly moves. Therefore, the possibility that the substantially annular ring is disengaged from the annular groove of one of the housing and the shaft member can be greatly reduced.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an enlarged schematic view showing a slab casting portion of a continuous casting machine.

  This continuous casting machine includes a ladle and a turret (not shown), a tundish 1, a mold 2, and a plurality of segments 3. Each segment 3 has a motor or the like and can rotate by itself. It has the drive roll apparatus 4 which has the drive roll of one Embodiment, and the driven roll apparatus 5 which has the driven roll (henceforth a driven roll) for continuous casting machines of one Embodiment of this invention which cannot rotate itself. The driving roll device 4 is arranged in place of the predetermined number of driven roll devices 5.

  The ladle is supported by a turret. Molten steel is poured from the ladle through the nozzle 8 into the tundish 1 and then molded into a predetermined shape (strip-shaped) slab in the mold 2 and the surface is cooled. Thereafter, the slab is cast, guided and transported by the drive roll device 4 and the driven roll device 5 which are separated on both sides of the slab so that the axis thereof is parallel to the surface of the slab, and gradually cooled. ing.

  FIG. 2 is a schematic diagram showing the structure of the driven roll device 5.

  As shown in FIG. 2, the driven roll device 5 includes an integral roll 21 as a shaft member, a first axle box 26 as a housing, a second axle box 27, and the integral roll 21. A rolling bearing that rotatably supports the single-shaft box 26 and a rolling bearing that rotatably supports the integrated roll 21 with respect to the second shaft box 27 are provided. The integrated roll 21 includes a large-diameter portion 29 located at the central portion in the axial direction, a first small-diameter portion located on one side in the axial direction of the large-diameter portion, and the other in the axial direction of the large-diameter portion. It consists of the 2nd small diameter part located in the side.

  The first axle box 26 is disposed so as to cover the first small diameter portion of the roll 21, and the second axle box 27 is disposed so as to cover the second small diameter portion of the roll 21.

  FIG. 3 is a schematic sectional view in the axial direction showing the inside of the second axle box 27 and the second axle box 27, and is a schematic sectional view in the axial direction of the rolling bearing device forming a part of the driven roll device 5. .

  This rolling bearing device includes the roll 21 as an example of a shaft member, the second axle box 27 and the lid 28 as an example of a housing, an aligning ring 31, an outer ring 33, an inner ring 35, and an annular spacer. 36, a plurality of cylindrical rollers 37, a two-divided ring 40, a female screw member 42 as a screw member, and an AW washer 45 as an example of a rotation preventing member. The aligning ring 31 and the outer ring 33 constitute a first race member, and the inner ring 35 and the annular spacer 36 constitute a second race member.

  The second small diameter portion 30 of the roll 21 has a first cylindrical outer peripheral surface 60 and a second cylindrical outer peripheral surface 62, and the outer diameter of the first cylindrical outer peripheral surface 60 is the outer diameter of the second cylindrical outer peripheral surface 62. Is bigger than. The first cylindrical outer peripheral surface 60 is connected to the second cylindrical outer peripheral surface 62 via a stepped portion 67 that expands in the radial direction. The second small diameter portion 30 has a ring mounting groove 64 as an annular groove. The ring mounting groove 64 extends in the circumferential direction of the roll 21. Both one end and the other end in the axial direction of the ring mounting groove 64 are connected to the second cylindrical outer peripheral surface 62.

  The second axle box 27 is fixed to the segment (see FIG. 1) 3. The lid 28 is attached to the outside of the second axle box 27 in the axial direction. The second axle box 27 has an annular and substantially cylindrical aligning ring mounting groove 50 extending in the circumferential direction on the inner peripheral surface thereof. The aligning ring 31 has a cylindrical outer peripheral surface and a spherical inner peripheral surface. The cylindrical outer peripheral surface of the aligning ring 31 is fitted and fixed in the aligning ring mounting groove 50.

  The aligning ring 31 is fitted and fixed in the aligning ring mounting groove 50. The aligning ring 31 is in a state where it cannot move relative to the second axle box 27.

  The outer ring 33 has a spherical outer peripheral surface and a cylindrical raceway surface 51. The spherical outer peripheral surface of the outer ring 33 is fitted to the spherical inner peripheral surface of the aligning ring 31. When the roll 21 is tilted with respect to the second axle box 27 due to movement of the slab or the like, alignment is performed between the spherical inner peripheral surface of the aligning ring 31 and the spherical outer peripheral surface of the outer ring 33. Is supposed to do.

  The inner ring 35 is externally fitted and fixed to the second cylindrical outer peripheral surface 62 of the second small diameter portion 30. The inner ring 35 has a cylindrical raceway surface 52. An end surface of the inner ring 35 on the first cylindrical outer peripheral surface 60 side in the axial direction is in contact with the stepped portion 67.

  The annular spacer 36 has a disk shape. The annular spacer 36 has a first end face and a second end face in the axial direction, and each of these end faces extends in the radial direction of the spacer 36. The annular spacer 36 is fitted and fixed to the outer peripheral surface 62 of the second cylinder. The annular spacer 36 is disposed on the side opposite to the first cylindrical outer peripheral surface 60 side in the axial direction of the inner ring 35. The first end surface of the annular spacer 36 is in contact with the end surface of the inner ring 35 on the spacer 36 side in the axial direction.

  The outer diameter of the cylindrical outer peripheral surface of the spacer 36 is larger than the outer diameter of the cylindrical raceway surface 52 of the inner ring 35. The spacer 36 serves as a saddle wheel that prevents the axial movement of the cylindrical roller 37 relative to the inner ring 35 on one axial side of the cylindrical raceway surface 52 of the inner ring 35.

  The plurality of cylindrical rollers 37 are disposed between the cylindrical raceway surface 51 of the outer ring 33 and the cylindrical raceway surface 52 of the inner ring 35 at intervals in the circumferential direction.

  The two-divided ring 40 (described in detail in FIG. 4) has a substantially L-shaped shape in the cross section in the axial direction. The two-divided ring 40 has a substantially annular projecting portion 84 to be described later on the radially inner side and the axial inner ring 35 side, and the projecting portion 84 is a ring mounting groove 64 of the second small-diameter portion 30. Is housed in. The two-divided ring 40 is a substantially annular member (see FIG. 4 below) and its outer peripheral surface (actually, it is not completely annular, but in the embodiment, it is roughly expressed as an outer peripheral surface). Has a male threaded portion 79.

  As shown in FIG. 3, the two-divided ring 40 includes a first inner peripheral surface 73 (in reality, it is not completely annular, but is roughly expressed as an inner peripheral surface in the embodiment), and a cylindrical shape. The second inner peripheral surface 75 (in reality, it is not completely annular, but in the embodiment, it is roughly expressed as an inner peripheral surface). The maximum inner diameter of the first inner peripheral surface 73 is smaller than the inner diameter of the second inner peripheral surface 75. The first inner peripheral surface 73 is connected to the second inner peripheral surface 75 via a stepped portion 74 that extends substantially in the radial direction of the shaft roll 21. The ring mounting groove 64 has a substantially cross-sectional rectangular shape in the axial cross section, and both side surfaces of the ring mounting groove 64 in the axial direction extend substantially in the radial direction of the roll 21. An end face 88 in the axial direction of the two-split ring 40 on the spacer 36 side is in contact with the second end face of the spacer 36 on the two-split ring 40 side. Further, the stepped portion 74 of the two-divided ring 40 is in contact with the side surface opposite to the cylindrical roller 37 side in the axial direction of the ring mounting groove 64 having a substantially rectangular cross section.

  The second inner peripheral surface 75 is fixed in contact with a portion of the second cylindrical outer peripheral surface 62 of the roll 21 that is connected to the end of the ring mounting groove 64 opposite to the cylindrical roller 37 side in the axial direction. The two split ring 40 is positioned in the radial direction with respect to the roll 21 by the second inner peripheral surface 75. The second inner peripheral surface 75 constitutes a radial positioning surface.

  A state in which the above-described two-divided ring 40 is fixed to the ring mounting groove 64, that is, the two-divided ring 40 in which the second inner peripheral surface 75 is fixed in contact with a part of the second cylindrical outer peripheral surface 62 of the roll 21. In the fixed state, the first inner peripheral surface 73 is located at a radial interval with respect to the bottom surface of the ring mounting groove 64. Further, in the fixed state of the two-divided ring 40, the end surface on the cylindrical roller 37 side of the projecting portion 84 is located at a slight interval in the axial direction with respect to the side surface of the ring mounting groove 64.

  The female screw member 42 has an L-shaped cross section. The female screw member 42 has a first inner peripheral surface 90 and a second inner peripheral surface 91. The first inner peripheral surface 90 is connected to the second inner peripheral surface 91 via a stepped portion 92 extending in the radial direction. The inner diameter of the first inner peripheral surface 90 is larger than the inner diameter of the second inner peripheral surface 91. The second inner peripheral surface 92 is opposed to the second cylindrical outer peripheral surface 62 of the second small-diameter portion 30 in the radial direction at an interval. The first inner peripheral surface 90 is located closer to the spacer 36 than the second inner peripheral surface 91. The first inner peripheral surface 90 has a female screw portion. The female screw member 42 is screwed into the two-divided ring 40 by screwing the female screw portion of the first inner peripheral surface with the male screw portion 79 of the outer peripheral surface of the two-divided ring 40.

  The AW washer 45 is an annular member. The inner periphery of the AW washer 45 has a rectangular first protrusion 98 (not shown in FIG. 3) that protrudes radially inward at one place in the circumferential direction, while the outer periphery of the AW washer 45 is It has 19 second projecting portions 99 projecting radially outward at equal intervals in the circumferential direction.

  As shown in FIG. 3, the main body portion of the AW washer 45 (the portion other than the first and second protrusions in the AW washer 45) is the second end surface on the opposite side of the cylindrical roller 37 side in the axial direction of the spacer 36. And the end face on the spacer 36 side in the axial direction of the female screw member 42. In a state where the main body portion of the AW washer 45 is sandwiched between the second end surface of the spacer 36 and the end surface on the spacer 36 side in the axial direction of the female screw member 42, the stepped portion 92 of the female screw member 42 has a two-part ring 40. The axial direction is opposed to the end surface on the opposite side to the cylindrical roller 37 side in the axial direction.

  Both end surfaces in the axial direction of the spacer 36 and end surfaces 88 (see FIG. 3) on the inner ring 35 side in the axial direction of the two-split ring 40 are polished or lapped. In this way, the surface roughness of both end faces in the axial direction of the spacer 36 and the end face 88 of the two-split ring 40 is reduced, and the friction between the spacer 36 and the two-split ring 40 is reduced. When an excessive moment load is received from the spacer 36, the two-split ring 40 moves relative to the spacer 36 in the circumferential direction. In this way, damage due to friction is unlikely to occur on the contact surfaces of the inner ring 35 and the spacer 36 and on the contact surfaces of the spacer 36 and the two-split ring 40.

  Although not described in detail, 47 and 49 are seal members. Each of the sealing members 47 and 49 is configured to be slidable in the circumferential direction with respect to the roll 21 while being fixed to the second axle box 27 or the lid 28. The seal member 47 seals between the second axle box 27 and the roll 21 on one side of the cylindrical roller 37 in the axial direction, and the seal member 49 is on the other side of the cylindrical roller 37 in the axial direction. The space between the lid 28 and the roll 21 is sealed.

  4 is a cross-sectional view taken along the line AA in FIG. 3, and is a cut surface on a plane passing through the end surface of the female screw member 42 on the spacer 36 side in the axial direction.

  As shown in FIG. 4, the two-divided ring 40 includes two arc-shaped members, that is, a first arc-shaped member 80 and a second arc-shaped member 81 (in the circumferential direction of each arc-shaped member). The length is constituted by a combination of approximately π radians and π radians or less) according to the arc method. The first arc-shaped member 80 and the second arc-shaped member 81 have two mating portions 67 and 68 that abut end portions in the circumferential direction.

  The first and second arc-shaped members 80 and 81 are simultaneously formed by cutting an annular member into two members by wire cutting. The first and second arc-shaped members 80 and 81 are formed by wire cutting to reduce the cutting width of the cut surface. When the two-divided ring 40 is configured by the first and second arc-shaped members 80 and 81, the circumferences of the joining portions 67 and 68 of the first arc-shaped member 80 and the second arc-shaped member 81 are When the two-divided ring 40 is attached to the ring attachment groove 64, the two-divided ring 40 is formed on the roll 21 so that the gap in the direction is remarkably reduced, specifically about 0.1 to 0.2 mm. It does not move in the circumferential direction.

  The outer circumferential surface of the first arc-shaped member 80 has a notch 94 having a substantially rectangular cross section that opens in the axial direction at one central location in the circumferential direction, while the outer circumferential surface of the female screw member 42 has a circumferential circumference. Four notches 82 having a substantially rectangular cross section that open in the axial direction are provided at substantially equal intervals in the direction.

  In this embodiment, the rotation of the female screw member 42 with respect to the two-divided ring 40 is performed as follows. That is, first, the first protrusion 98 that is bent so as to extend in the axial direction of the AW washer 45 is accommodated in the notch 94 of the two-part split ring 40. Next, the female screw member 42 is screwed in the axial direction by a predetermined distance from the outer peripheral side of the two split ring 40. After that, one of the 19 second protrusions 99 of the AW washer 45 is one second protrusion (indicated by 99a in FIG. 4) whose circumferential phase coincides with the phase of the notch 82 of the female screw member 42. Is bent and accommodated in the notch 82 of the female screw member 42. In this way, the two-divided ring 40 and the female screw member 42 cannot be rotated relative to each other via the AW washer 45.

  As shown in FIG. 3, the first inner peripheral surface 90 of the female screw member 42 in a state in which the female screw member 42 is screwed into the two-divided ring 40 for a predetermined distance and cannot rotate relative to the two-divided ring 40. Is overlapped in the radial direction on the entire surface of the second inner peripheral surface 75 of the two-split ring 40.

  According to the rolling bearing device of the above embodiment, the annular female screw member 42 is arranged on the outer peripheral surface side of the substantially annular split ring 40 so as to be screwed into the male screw portion 79 of the split ring 40. Even if a complicated load such as a tipping moment acts on the two-divided ring 40 and the two-divided ring 40 tries to move, the two-divided ring 40 exerts a force from the female screw member 42 toward the roll 21 in the radial direction. As a result, the two-divided ring 40 hardly moves. Therefore, the possibility that the two-divided ring 40 is detached from the annular groove 64 of the roll 21 can be significantly reduced.

  Further, according to the rolling bearing device of the above-described embodiment, the two-divided ring 40 can be positioned in the radial direction by the second inner peripheral surface 75 of the two-divided ring 40 serving as a radial positioning surface.

  Further, according to the rolling bearing device of the above-described embodiment, the first inner peripheral surface 73 of the protruding portion 84 of the two-divided ring 40, which is a surface facing the bottom of the ring mounting groove 64, is the bottom of the ring mounting groove 64. Therefore, the vertical drag that the second inner peripheral surface 75 that is the radial positioning surface receives from the outer peripheral surface of the roll 21 is increased. Therefore, the ability to cancel the overturning moment from the spacer 36 can be increased, and the inclination caused by the overturning moment from the spacer 36 of the two-parted ring 40 can be further suppressed.

  Further, according to the rolling bearing device of the above-described embodiment, the female screw member 42 is screwed into the two-divided ring 40 for a predetermined distance and cannot rotate relative to the two-divided ring 40. Since the first inner peripheral surface 90 overlaps the entire surface of the second inner peripheral surface 75 of the two-divided ring 40 in the radial direction, the second inner peripheral surface 75 that is a radial positioning surface is the second inner peripheral surface 75. It is possible to increase the force for tightening the peripheral surface portion on which the abuts. Therefore, the inclination of the two-divided ring 40 can be further suppressed.

  In addition, according to the rolling bearing device of the above embodiment, the AW washer 45 that is a rotation preventing member can prevent the female screw member 42 from rotating relative to the two-divided ring 40. Therefore, the female screw member 42 is not loosened with respect to the two-divided ring 40, and the female screw member 42 can be prevented from being detached from the two-divided ring 40.

  Further, according to the driven roll device 5 of the above-described embodiment, in the rolling bearing device having a structure in which the protruding portion 84 of the two split ring 40 for axial load application is fitted into the ring mounting groove 64, the two split ring 40 is attached to the ring. Since it does not come off from the groove 64, the reliability of the rolling bearing device can be increased, and the life of the rolling bearing device can be extended.

  In the rolling bearing device of the above-described embodiment, the two-divided ring 40 is attached to the ring mounting groove 64 on the outer peripheral surface of the roll 21 that is a shaft member, and the female screw member 42 is attached to the outer peripheral surface of the two-divided ring 40. In the present invention, the N (N is a natural number of 3 or more) split ring is attached to the ring mounting groove on the outer peripheral surface of the roll as the shaft member, and the female screw is provided. The member may be configured to be screwed into the external thread portion on the outer peripheral surface of the N-divided ring.

  In the rolling bearing of the above embodiment, the aligning ring 31 is fitted into the second shaft box 27 that is a housing, and the spherical outer periphery of the outer ring 33 is formed on the spherical inner peripheral surface of the aligning ring 31. Although the rolling bearing device according to the present invention has a configuration in which the surface is fitted inside, the configuration has no aligning ring, and the outer circumferential surface of the outer ring is directly fitted into the inner circumferential surface of the housing. good. For example, the rolling bearing device of the present invention may be a self-aligning roller bearing, a cylindrical roller bearing having no aligning function, or the like.

  In the rolling bearing of the above embodiment, the annular spacer 36 is disposed between the inner ring 35 and the two-divided ring 40 in the axial direction of the inner ring 35. In the present invention, however, the spacer and the inner ring are disposed in the axial direction. Alternatively, the inner ring may be in direct contact with the substantially annular ring. Even in this case, since the axial end face of the inner ring is usually polished, the inner ring and the two-part ring are obtained by polishing or lapping the axial end face on the inner ring side of the substantially annular ring. It goes without saying that damage due to friction is less likely to occur on the contact surfaces of each other.

  In the rolling bearing device of the above embodiment, the first inner peripheral surface 73, which is a surface facing the bottom of the ring mounting groove 64 of the protruding portion 84, is positioned at a distance from the bottom of the ring mounting groove 64. However, in this invention, the contact surface pressure between the protrusion and the annular ring mounting groove is such that the radial positioning surface (second inner peripheral surface) and the peripheral surface on which the radial positioning surface is tightly fitted. Under the condition lower than the contact surface pressure with the (second cylindrical outer peripheral surface), the tip end (first inner peripheral surface) of the protrusion may be in contact with the groove bottom of the annular ring mounting groove.

  Further, in the rolling bearing device of the above embodiment, when the female screw member 45 is fastened to the two-divided ring 40 in the axial direction by a predetermined distance, the 19 second protrusions 99 of the AW washer 45 and the four female screw members 42 are provided. A pair of notches 82 having the same phase in the circumferential direction was formed. However, according to the present invention, when the female screw member is fastened to the two-divided ring in the axial direction by a predetermined distance, the circumferential phase is caused by the plurality of second protrusions of the AW washer and the plurality of notches of the female screw member. Needless to say, there may be two or more pairs that match, and the two split rings and the female screw member cannot rotate relative to each other, and two or more second protrusions of the AW washer are connected to the female screw member. Needless to say, it may be housed in the notch.

  In the rolling bearing device of the above embodiment, the AW washer 45 has one first projecting portion 98 projecting inward in the radial direction and 19 second projecting portions 99 projecting outward in the radial direction. However, in the present invention, it is needless to say that the number of the first protrusions protruding inward in the radial direction may be any number other than 1, and the first protrusions protruding outward in the radial direction may be used. Needless to say, the number of the two protruding portions may be any number other than 19. In the AW washer, the number of first protrusions accommodated in the substantially annular ring notch is equal to the number of ring notches, or less than the number of ring notches, Needless to say, this is an essential condition.

  Further, in the rolling bearing device of the above embodiment, the rotation of the female screw member 42 with respect to the two-divided ring 40 is performed by the AW washer 45. However, in the present invention, the screw member is not rotated with respect to the substantially annular ring. Also good. Moreover, in this invention, you may perform rotation prevention of the screw member with respect to a substantially annular ring by methods other than the method of using an AW washer, such as key engagement, caulking, and pinning.

  In the rolling bearing device of the above embodiment, the split ring 40 is attached to the ring mounting groove 64 on the outer peripheral surface of the roll 21 that is a shaft member, and the female screw member 42 is attached to the outer peripheral surface of the split ring 40. In the present invention, the M (M is a natural number of 2 or more) split ring is attached to the ring mounting groove on the inner peripheral surface of the housing, and the M split ring of the M split ring is used. The configuration may be such that the male screw portion on the outer peripheral surface of the male screw member as the screw member is screwed into the female screw portion on the inner peripheral surface.

  Further, in the rolling bearing device of the above embodiment, the female screw member 42 is overlapped in the radial direction on the entire surface of the second inner peripheral surface 75 that is a radial positioning surface. In the present invention, as in the above-described embodiment, it is preferable that the screw member overlaps in a radial direction in a region larger than half of the radial positioning surface in the axial direction.

  Moreover, although the roll apparatus for continuous casting machines of the said embodiment was the driven roll apparatus 5, the roll apparatus for continuous casting machines of this invention which has a rolling bearing apparatus of this invention is a drive roll apparatus, Also good.

  Further, the driven roll device 5 of the above embodiment and the drive roll device of the above modification may have either one or two rolling bearing devices of the present invention. However, when one of the rolling bearing devices is the above embodiment, the other rolling bearing device uses the collar of either the inner ring or the outer ring when using a cylindrical roller bearing so as to allow expansion and contraction of the roll. However, when a bearing that receives an axial load such as a self-aligning roller bearing is used, the outer ring must be configured to slide relative to the axle box. Since the driven roll device 5 of the above embodiment has only one roll 21, when it has two rolling bearing devices, the shaft member is the roll 21 in both of the two rolling bearings, The housing of one rolling bearing device becomes the first axle box 26, and the housing of the other rolling bearing device becomes the second axle box 27.

  Moreover, although the driven roll apparatus 5 of the said embodiment had only one roll 21 corresponded to a shaft member, the roll for continuous casting machines of this invention has the roll corresponding to a shaft member N ( N may be a natural number of 2 or more), and may have a structure in which N rolls are arranged on a substantially straight line. And the roll apparatus for continuous casting machines may have 1 or more and 2N or less rolling bearing apparatus of the present invention (there may be a roll apparatus that does not become a part of the rolling bearing apparatus of the present invention. ).

It is an expansion schematic diagram which shows the slab casting part of a continuous casting machine. It is a schematic diagram which shows the structure of the driven roll apparatus which the said slab casting part has. It is a schematic cross section of the axial direction of the rolling bearing apparatus which makes a part of said driven roll apparatus. It is AA sectional view taken on the line of FIG.

5 Follower Roll 21 Roll 27 First Shaft Box 31 Centering Wheel 33 Outer Ring 35 Inner Ring 36 Spacer 37 Cylindrical Roller 40 Ring 42 Female Thread Member 45 AW Washer 64 Ring Mounting Groove 79 Male Thread Portion 80, 81 Arc-shaped Member

Claims (5)

A housing having an inner peripheral surface;
A shaft member having an outer peripheral surface;
A first race member having an outer peripheral surface fitted to the inner peripheral surface of the housing and a raceway surface;
A second raceway member having an inner circumference surface fitted to the outer circumference surface of the shaft member, and a raceway surface;
A plurality of rolling elements disposed between the raceway surface of the first raceway member and the raceway surface of the second raceway member;
One member of the housing and the shaft member has an annular groove on a peripheral surface of the one member,
A plurality of arc-shaped members are arranged so as not to overlap in the axial direction at substantially the same position in the axial direction on the peripheral surface of the one member, and are substantially annular protrusions accommodated in the annular groove And a substantially annular surface radially opposite to the other of the housing and the shaft member, and an end surface on one side in the axial direction is the first track member or the second member. While the end face of the raceway member is in contact with the end face in the axial direction, the end face opposite to the one side in the axial direction of the projecting portion is in contact with the end face in the axial direction of the annular groove. With a ring,
The substantially annular surface has a threaded portion,
An annular screw member having a peripheral surface having a screw portion screwed into the screw portion ;
The substantially annular ring has a substantially annular radial positioning surface fixed to the circumferential surface of the one member by contacting a portion connected to the annular groove on the circumferential surface of the one member,
The radial positioning surface is substantially cylindrical,
The rolling bearing device according to claim 1, wherein the substantially annular ring does not have a screw hole into which a bolt is screwed . The rolling bearing device according to claim 1 ,
The surface of the protruding portion that faces the bottom of the annular groove is located at a distance from the bottom of the annular groove, or the contact surface pressure between the protruding portion and the annular groove is A rolling bearing device having a lower contact surface pressure between the peripheral surface of the member and the radial positioning surface. In the rolling bearing device according to claim 1 or 2 ,
A rolling bearing device, wherein at least a part of the screw member overlaps the radial positioning surface in the radial direction. In the rolling bearing device according to any one of claims 1 to 3 ,
A rolling bearing device comprising a rotation preventing member for preventing the screw member from rotating relative to the substantially annular ring. Comprises a rolling bearing device according to any one of claims 1 to 4, the shaft member is a roll apparatus for a continuous casting machine, characterized in that the rolls for conveying the slab.

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