JP5332563B2 - Rolling bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device in which galling hardly occurs on a collar part and an end face of a roller. <P>SOLUTION: A step part 67 and an annular retaining ring installing groove 64 are provided to a roll 1, and a C-shaped retaining ring 15 is fitted in the retaining ring installing groove 64. An annular second spacer 14, a second cage roller 10, an annular second collar part 22 of an inner ring 5, an annular body part 20 of the inner ring 5, an annular first collar part 21 of the inner ring 5, a first cage roller 9, and an annular first spacer 13 are fitted on to the roll 1 and disposed between the step part 67 and the C-shaped retaining ring 15 in this order from the step part 67. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

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

  Conventionally, as a rolling bearing device, there is one described in Japanese Utility Model Publication No. 63-142419 (Patent Document 1). The rolling bearing device includes a shaft member, a housing member, a collar, a cylindrical roller bearing, and a retaining ring, and the cylindrical roller bearing includes a centering ring, an outer ring, an inner ring, and a plurality of cylindrical rollers. The aligning ring has an inner surface made of a part of a spherical surface, and the outer ring has an outer surface made of a part of a spherical surface.

  The aligning ring is fixed to the inner peripheral surface of the housing, and the outer surface of the outer ring is fitted to the inner surface of the aligning ring. The outer ring has a flange on one side and the other side of the raceway surface. On the other hand, the inner ring is fitted and fixed to the outer peripheral surface of the shaft member. One end surface of the inner ring in the axial direction is in contact with a step portion of the shaft member.

  The inner ring has a flange on one side in the axial direction of the raceway surface. The retaining ring is fitted in the annular groove of the shaft member. Further, the saddle wheel is fixed by being fitted around the shaft member. The saddle wheel is clamped in the axial direction by an end face on the other side in the axial direction of the inner ring and a retaining ring. The plurality of cylindrical rollers are arranged so as not to overlap in the axial direction between the raceway surface of the outer ring and the raceway surface of the inner ring.

  When the axial load is applied to the rolling bearing device, the stepped portion of the shaft member, the flange portion on the one side of the inner ring, the flange portion on the other side in the axial direction of the cylindrical roller and the outer ring, and a centering ring The axial force is transmitted by transmitting the force in the order of the housing member, and the retaining ring, the collar ring, the cylindrical roller, the collar portion on one side in the axial direction of the outer ring, the aligning ring, and the housing member In order to receive the axial load by applying force in order.

  In the above-mentioned conventional rolling bearing device, the axial load is applied by sliding contact between the end surface of the cylindrical roller that is rolling and the collar part or the collar ring. As in the case of the case, the oil film formation becomes difficult in the specification of extremely low speed rotation. As a result, the contact between the end surface of the cylindrical roller and the collar portion or the collar is a metal contact, and the end surface of the cylindrical roller, the collar portion or the collar may be galled.

In particular, in the case of a full-roller rolling bearing device that does not have a cage, when the roller is about to fall under an axial load, the collar part or collar and the end face of the roller hit the edge. As a result, the surface pressure locally increases, and the end face of the cylindrical roller, the collar part or the collar ring may be galled.
Japanese Utility Model Publication No. 63-142419 (FIG. 3)

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rolling bearing device in which galling and end surfaces of rollers are less likely to be galling.

In order to solve the above problems, the rolling bearing device of the present invention is
A shaft member;
A housing member;
A first track having a main body portion having a raceway surface and a flange portion located on one side of the raceway surface in the axial direction and fitted to one member of the shaft member and the housing member. A member,
A second surface fitted to the other member of the shaft member and the housing member has a raceway surface and a flange portion located on the opposite side to the one side in the axial direction of the raceway surface. A track member;
A plurality of first rollers disposed between the raceway surface of the first raceway member and the raceway surface of the second raceway member;
The one member has a step portion facing the flange portion of the first track member in the axial direction,
The flange portion of the first track member is capable of relative movement with respect to the body portion of the first track member,
A plurality of rolling elements capable of rolling on the flange portion of the first track member and the step portion of the one member ;
The axial load is determined by the step of the one member, the plurality of rolling elements, the flange of the first track member, the first roller, the flange of the second track member, and the other member. by transmitting the axial load is characterized it can der Rukoto be loaded with the one member and the other member above.

  According to the present invention, the flange portion of the first track member can be moved relative to the main body portion of the first track member, and the flange portion and the one member of the first track member. Since the step portion includes a plurality of rolling elements capable of rolling, when the sliding contact between the flange portion of the first track member and the first roller becomes excessive, the rolling element rolls. By moving, the collar part can be rotated relative to the step part. Therefore, since the sliding of the first roller with respect to the flange can be alleviated by the relative rotation of the flange with respect to the stepped portion, it is possible to suppress the occurrence of galling on the end surfaces of the flange and the first roller.

In one embodiment,
The plurality of rolling elements are a plurality of second rollers,
A cage is provided that holds the plurality of second rollers at intervals in the circumferential direction.

  According to the above embodiment, the plurality of rolling elements disposed between the flange portion and the step portion are the plurality of second rollers, and the plurality of second rollers are held by the cage. Therefore, the relative rotation of the flange with respect to the stepped portion can be made smooth. Therefore, the slip of the first roller with respect to the flange portion can be further reduced, and the occurrence of galling on the end surfaces of the flange portion and the first roller can be further suppressed.

  According to the rolling bearing device of the present invention, the flange portion of the first race member is relatively movable with respect to the main body portion of the first race member, and the flange portion of the first race member; Since a plurality of rolling elements capable of rolling are provided on the step portion of one of the shaft member and the housing member, the sliding contact between the flange portion of the first track member and the first roller is excessive. In this case, the collar portion can be rotated relative to the step portion, and the slippage of the first roller relative to the collar portion can be alleviated. Therefore, it is possible to suppress the occurrence of galling on the end surfaces of the flange portion and the first roller.

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

  FIG. 1 is a schematic enlarged view of a roll neck portion in a driven roll device of a continuous casting machine which is an embodiment of a rolling bearing device of the present invention.

  This rolling bearing device includes a roll 1, a shaft box 2, a lid 3, a cylindrical roller bearing 4, a first cage roller 9, a second cage roller 10, an annular first spacer 13, and an annular The cylindrical roller bearing 4 includes a second spacer 14 and a C-shaped retaining ring 15. The cylindrical roller bearing 4 includes an inner ring 5, a centering ring 6, an outer ring 7, and a plurality of cylindrical rollers 8.

  The roll 1, the first spacer 13, the second spacer 14, and the C-shaped retaining ring 15 constitute a shaft member, and the axle box 2 and the lid 3 constitute a housing member. The inner ring 5 includes an annular main body portion 20, an annular first flange portion 21, and an annular second flange portion 22. The inner ring 5 constitutes a first track member. The aligning ring 6 and the outer ring 7 constitute a second race member. The cylindrical roller 8 constitutes a first roller. In this embodiment, the shaft member constitutes one member, and the housing member constitutes the other member.

  As shown in FIG. 1, the roll neck of the roll 1 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 second cylindrical outer peripheral surface. The outer diameter of 62 is larger. 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 roll neck has an annular retaining ring mounting groove 64, and the retaining ring mounting groove 64 extends in the circumferential direction of the roll 1. Both one end and the other end in the axial direction of the retaining ring mounting groove 64 are connected to the second cylindrical outer peripheral surface 62.

  The axle box 2 is fixed to a segment (not shown) of a continuous casting machine. A lid 3 is fixed to the axle box 2. The housing member composed of the axle box 2 and the lid 3 has an annular and substantially cylindrical aligning ring mounting groove 50 on the inner periphery thereof. The stepped portion 90 protruding radially inward from the inner peripheral surface of the axle box 2 constitutes a side surface opposite to the axial lid 3 side of the aligning ring mounting groove 50. On the other hand, the end face of the lid 3 on the side of the axle box 2 protrudes in the axial direction on the outer diameter side end face facing the end face of the axle box 2 in the axial direction and the radially inner side of the outer diameter side end face. An axial protrusion is provided, and the axial protrusion includes a cylindrical surface extending in the axial direction from the outer diameter side end surface, and an axial protrusion end surface 97 on the opposite side of the axial outer diameter side end surface of the cylindrical surface. Have

  The aligning ring 6 has a cylindrical outer peripheral surface and a spherical inner peripheral surface. The cylindrical outer peripheral surface of the aligning ring 6 is fitted and fixed in the aligning ring mounting groove 50. The cylindrical surface of the axially protruding portion is fitted into the aligning ring mounting groove 50, and the axially protruding end surface 97 of the axially protruding portion is in contact with the end surface of the aligning ring 6 on the lid 3 side. The alignment ring 6 is positioned with respect to the housing member by being sandwiched in the axial direction by the stepped portion 90 and the axially projecting end surface 97. The aligning ring 6 is in a state where it cannot move relative to the axle box 2.

  The outer ring 7 has a spherical outer peripheral surface and an inner peripheral surface having a groove having a substantially rectangular cross section. The spherical outer peripheral surface of the outer ring 7 is fitted to the spherical inner peripheral surface of the aligning ring 6. When the roll 1 is tilted with respect to the axle box 2 due to a roll mounting error or a load on the roll during use, the spherical inner peripheral surface of the aligning ring 6 and the spherical outer peripheral surface of the outer ring 7 In between, it is supposed to perform alignment. In addition, the bottom of the groove having a substantially rectangular cross section forms a cylindrical raceway surface 51, and each of both side surfaces of the groove forms a flange. The flanges of these outer rings 7 constitute the flanges of the second track member.

  The inner ring 5 is fitted and fixed to the outer peripheral surface 62 of the second cylinder. The main body 20 of the inner ring 5 has a cylindrical raceway surface 52. The first flange portion 21 is located on the lid 3 side of the main body portion 20 in the axial direction. The first flange 21 is fitted into the second cylindrical outer peripheral surface 62 with a gap. The axial end surface of the first flange portion 21 is in contact with the axial end surface of the main body portion 20. Further, the second flange portion 22 is located on the opposite side of the main body portion 20 in the axial direction from the lid 3 side. The second flange 22 is fitted into the second cylindrical outer peripheral surface 62 with a gap. The axial end surface of the second flange portion 22 is in contact with the axial end surface of the main body portion 20.

  The plurality of cylindrical rollers 8 are arranged so as not to overlap in the axial direction between the cylindrical raceway surface 51 of the outer ring 7 and the cylindrical raceway surface 52 of the inner ring 5. Although not shown, in the axial cross section, the end surfaces on the one side and the other side in the axial direction of each cylindrical roller 8 have an arcuate shape. The center of curvature of one end surface in the axial direction of each cylindrical roller 8 is located on the other side in the axial direction of the cylindrical roller 8 with respect to the center of the cylindrical roller 8, while the other in the axial direction of each cylindrical roller 8. The center of curvature of the side end face is located on one side of the cylindrical roller 8 in the axial direction from the center of the cylindrical roller 8.

  Thus, the axial dimension of the cylindrical roller 8 when the central axis of the cylindrical roller 8 is inclined with respect to the axial direction is the cylinder when the central axis of the cylindrical roller 8 is parallel to the axial direction. It is made longer than the dimension of the roller in the axial direction. In this way, when an axial load is applied to the cylindrical roller bearing 4, the central axis of the cylindrical roller 8 is less likely to be inclined with respect to the axial direction.

  The C-shaped retaining ring 15 is fitted in a retaining ring mounting groove 64. The first spacer 13 and the second spacer 14 are made of bearing steel (SUJ2 or the like). The first spacer 13 is externally fitted and fixed to the second cylindrical outer peripheral surface 62 by a gap fit. An end surface of the first spacer 13 opposite to the inner ring 5 side in the axial direction is in contact with the C-shaped retaining ring 15. The second spacer 14 is externally fitted and fixed to the second cylindrical outer peripheral surface 62 by a gap fit. The second spacer 14 is in contact with the stepped portion 67 of the roll 1.

  The end face 99 on the inner ring 5 side in the axial direction of the first spacer 13 is a collar part of the first track member in the shaft member which is one member (corresponding to the first collar part 21 of the inner ring 5 in this embodiment). The step part which opposes to an axial direction is comprised. The first cage roller 9 is disposed between the first flange 21 and the first spacer 13 in the axial direction. The end surface 98 on the inner ring 5 side in the axial direction of the second spacer 14 is also a flange portion of the first track member in the shaft member which is one member (corresponding to the second flange portion 22 of the inner ring 5 in this embodiment). The step part which opposes to an axial direction is comprised. The second cage roller 10 is disposed between the second flange 22 and the second spacer 14 in the axial direction.

  The first cage roller 9 has a plurality of needle rollers 91 and a cage 92. The plurality of needle rollers 91 are arranged at intervals in the circumferential direction while being held by a cage 92. The rolling surfaces of the needle rollers 91 are in contact with the end surface of the first flange 21 on the first spacer 13 side and the end surface 99 of the first spacer 13 on the first flange 21 side. The needle roller 91 constitutes a second rolling element (roller).

  The second cage roller 10 has a plurality of needle rollers 93 and a cage 94. The plurality of needle rollers 93 are arranged at intervals in the circumferential direction while being held by a cage 94. The rolling surfaces of the needle rollers 93 are in contact with the end surface of the second flange 22 on the second spacer 14 side and the end surface of the second spacer 14 on the second flange 22 side. The needle roller 93 also constitutes a second rolling element (roller).

  When the needle roller 91 or 93 receives a large rotational torque, the needle roller 91 or 93 which is a thrust roller rolls in the circumferential direction, and the flange portion 21 or 22 is relative to the spacer 13 or 14. It is designed to rotate. Each of the needle rollers 91 or 93 plays a role of transmitting axial force while escaping the circumferential advance and delay of each member fitted to the roll 1.

  In addition, if the bearing steel spacers 13 and 14 are arranged on the side opposite to the inner ring 5 side of the needle rollers 91 and 93 as in this embodiment, the rigidity of the member that holds the needle rollers 91 and 93 is increased. It can be surely secured.

  In this embodiment, the plurality of needle rollers 91 of the first cage roller 9 applies an axial load when the axial distance between the first flange 21 and the first spacer 13 is reduced. can do. Further, the plurality of needle rollers 93 of the second cage roller 10 can apply an axial load when the axial distance between the second flange portion 22 and the second spacer 14 is narrowed.

  Although not described in detail, 27 and 28 are seal members. Each of the sealing members 27 and 28 is fixed to the lid 3 and the axle box 2, and is configured to be slidable in the axial direction with respect to the roll 1. The sealing member 27 seals between the lid 3 and the roll 1 on one side of the cylindrical roller 8 in the axial direction, and the sealing member 28 on the other side of the cylindrical roller 8 in the axial direction. And the roll 1 are sealed.

  Although not described in detail, 68 is a lubricant sealing hole that penetrates the outer ring 7 in the radial direction, and 69 is a lubricant sealing hole that penetrates the aligning ring 6 in the radial direction. The lubricant enclosing hole 68 of the outer ring 7 opens into a circumferential groove of the outer ring 7 formed along the circumferential direction on the outer circumferential surface of the outer ring 7, and the lubricant of the aligning ring 6 is passed through the circumferential groove of the outer ring 7. It communicates with the sealing hole 69. The end of the aligning ring 6 opposite to the outer ring 7 side of the lubricant sealing hole 69 has a diameter in the circumferential groove of the aligning ring mounting groove 50 formed along the inner peripheral surface of the aligning ring mounting groove 50. It opens opposite to the direction, and opens to a lubricant supply passage of a housing member (not shown) through the circumferential groove of the aligning ring mounting groove 50. The lubricant supply passage passes through the housing. Cylindrical roller bearings inject lubricant from the opening on the opposite side of the lubricant supply passage to the lubricant enclosure hole 69 and sequentially pass through the lubricant supply passage, lubricant enclosure hole 69 and lubricant enclosure hole 68. A lubricant is injected into 4.

  In the above configuration, the rolling bearing device receives an axial load diagonally. Specifically, in this rolling bearing device, the axial load is applied to the step portion 67 of the roll 1, the second spacer 14, the plurality of needle rollers 93 of the second cage roller 10, the second flange portion 22, the cylindrical roller 8, The axial load is transmitted between the shaft member and the housing member by transmitting to the flange portion of the outer ring 7 on the lid 3 side, the aligning ring 6 and the axially projecting end surface 97 of the lid 3 on the shaft box 2 side. .

  Alternatively, in this rolling bearing device, the axial load is applied to the roll 1, the C-shaped retaining ring 15, the first spacer 13, the plurality of needle rollers 91 of the first cage roller 9, the first flange portion 21, the cylindrical roller 8, and the outer ring. 7 is transmitted to the flange portion on the opposite side of the lid 3 side, the aligning ring 6 and the stepped portion 90 of the axle box 2 so that an axial load is applied between the shaft member and the housing member.

  Further, this rolling bearing device has a plurality of needle rollers 91 of the cage roller 9 or a plurality of cage rollers 10 when a large advance or delay occurs in the circumferential direction in each member fitted to the roll 1 due to the rotational torque. In the needle roller 93, this advance / delay is released while an axial force is transmitted.

  According to the rolling bearing device of the above-described embodiment, the first flange portion 21 of the inner ring 5 can be moved relative to the main body portion 20 of the inner ring 5, and the first flange portion 21 and the first spacer of the inner ring 5 can be moved. 13 is provided with a rollable needle roller 91 on the end surface 99 on the inner ring 5 side, so that even if the sliding contact between the first flange 21 of the inner ring 5 and the cylindrical roller 8 becomes excessive due to the rotational torque, The first roller 21 can be rotated relative to the first spacer 13 by the rolling of the needle roller 91, and the sliding of the cylindrical roller 8 with respect to the first flange 21 can be reduced. Therefore, it is possible to suppress the occurrence of galling on the first flange 21 and the end faces of the cylindrical rollers 8.

  Further, according to the rolling bearing device of the above embodiment, the plurality of rolling elements arranged between the first flange 21 and the end face 99 on the inner ring 5 side of the first spacer 13 are the plurality of needle rollers 91. In addition, since the plurality of needle rollers 91 are held by the cage 92, the relative rotation of the first flange portion 21 with respect to the end surface 99 on the inner ring 5 side of the first spacer 13 is made smooth. can do. Therefore, the sliding of the cylindrical roller 8 with respect to the first flange 21 can be further reduced, and the occurrence of galling on the end surfaces of the first flange 21 and the cylindrical roller 8 can be further suppressed.

  In the rolling bearing device of the above-described embodiment, the inner ring 5 is constituted by the main body portion 20 and the first and second flange portions 21 and 22 that are separate from the main body portion 20. The cage roller 9 is disposed between the first spacer 13 and the cage roller 10 is disposed between the second flange 22 and the second spacer 14. However, according to the present invention, the inner ring main body portion and a separate flange portion are provided only on one side in the axial direction of the inner ring, and a cage roller is disposed between the flange portion and the step portion of the shaft member. May be. Moreover, in this invention, you may arrange | position the roller of the state which is not hold | maintained at the holder | retainer between the main-body part of an inner ring | wheel, the collar part of a different body, and the step part of a shaft member.

  Further, in the rolling bearing device of the above embodiment, the cage roller 9 is disposed between the first flange portion 21 that is separate from the main body portion 20 of the inner ring 5 and the step portion of the shaft member. The outer ring may be configured by a main body portion having a raceway surface, and the main body portion and a separate flange portion, and a cage roller may be disposed between the flange portion and the step portion of the housing member.

  In the rolling bearing device of the above embodiment, the stepped portion of the shaft member as one member is the end surface 99 on the inner ring 5 side of the first spacer 13 in the axial direction. The step portion may be an annular portion that is integral with the peripheral surface of the shaft member or the housing member and protrudes in the radial direction from the peripheral surface.

  In the rolling bearing device of the above embodiment, the aligning ring 6 is fitted in the axle box 2, and the spherical outer peripheral surface of the outer ring 7 is fitted in the spherical inner peripheral surface of the aligning ring 6. However, the rolling bearing device according to the present invention may be configured so as not to have the aligning ring, and may be configured such that the outer peripheral surface of the outer ring is directly fitted into the inner peripheral surface of the housing member.

  Moreover, in the rolling bearing device of the above embodiment, the needle roller 91 is disposed between the first flange 21 of the inner ring 5 and the first spacer 13, but in this invention, the flange of the first race member, Further, the ball may be disposed between the shaft member and the stepped portion of one of the housing members in a state where the ball is held by a cage or in a state where no cage is present.

  Further, in the rolling bearing device of the above embodiment, the retaining ring is the C-shaped retaining ring 15, but in this invention, the retaining ring is a retaining ring other than the C-shaped retaining ring, such as a concentric retaining ring or an E-shaped retaining ring. It may be a ring.

  Moreover, although the rolling bearing apparatus of the said embodiment was a driven roll apparatus of the continuous casting machine, the driving roll apparatus of a continuous casting machine may be sufficient as the rolling bearing apparatus of this invention. In addition, the rolling bearing device of the present invention is used in a situation where an axial load and a rotational torque are applied, and can be mounted on any machine as long as the machine includes a rolling bearing.

It is a model enlarged view of the roll neck part in the driven roll apparatus of the continuous casting machine which is one Embodiment of the rolling bearing apparatus of this invention.

DESCRIPTION OF SYMBOLS 1 Roll 2 Shaft box 3 Cover 4 Cylindrical roller bearing 5 Inner ring 6 Centering ring 7 Outer ring 8 Cylindrical roller 9 1st cage roller 10 2nd cage roller 13 1st spacer 14 2nd spacer 15 C-shaped retaining ring 20 Main body part 21 First collar part of inner ring 22 Second collar part of inner ring 51 Cylindrical raceway surface of outer ring 52 Cylindrical raceway surface of inner ring 90 Step part of axle box 91,93 Needle rollers 92,94 Cage 97 Axial projection of lid End surface 99 End surface on the inner ring side in the axial direction of the first spacer

Claims (2)

A shaft member;
A housing member;
A first track having a main body portion having a raceway surface and a flange portion located on one side of the raceway surface in the axial direction and fitted to one member of the shaft member and the housing member. A member,
A second surface fitted to the other member of the shaft member and the housing member has a raceway surface and a flange portion located on the opposite side to the one side in the axial direction of the raceway surface. A track member;
A plurality of first rollers disposed between the raceway surface of the first raceway member and the raceway surface of the second raceway member;
The one member has a step portion facing the flange portion of the first track member in the axial direction,
The flange portion of the first track member is capable of relative movement with respect to the body portion of the first track member,
A plurality of rolling elements capable of rolling on the flange portion of the first track member and the step portion of the one member ;
The axial load is determined by the step of the one member, the plurality of rolling elements, the flange of the first track member, the first roller, the flange of the second track member, and the other member. by transmitting rolling bearing apparatus of the axial load, characterized by capable der Rukoto be loaded with the one member and the other member above. The rolling bearing device according to claim 1,
The plurality of rolling elements are a plurality of second rollers,
A rolling bearing device comprising a cage for holding the plurality of second rollers at intervals in the circumferential direction.

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