JP2011075067A - Rolling bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve productivity and reduce outgassing, and to prevent occurrence of resonant frequency fluctuation and torque fluctuation. <P>SOLUTION: A rolling bearing device 10 includes: two rolling bearings 1A, 1B spaced from each other in an axial direction; a shaft 13 fitted to inner rings 3a, 3b; and a sleeve 23 having a fitting hole 25 to which outer rings 5a, 5b are fitted. The rolling bearings 1A, 1B have: the inner rings 3a, 3b and the outer rings 5a, 5b disposed coaxially; a plurality of rolling elements 7 disposed at intervals in a circumferential direction in ring-like spaces between the inner rings 3a, 3b and the outer rings 5a, 5b. At least one portion of fitting parts between the inner rings 3a, 3b and the shaft 13 and fitting parts between the outer rings 5a, 5b and the sleeve 23 is laser-welded, and a keyhole H is formed to be shifted from a boundary between the inner rings 3a, 3b and the shaft 13 or a boundary between the outer rings 5a, 5b and the sleeve 23, in the laser-welded fitting part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rolling bearing device.

  In general, a rolling bearing device includes a rolling bearing having an inner ring and an outer ring arranged coaxially, an inner cylinder fitted to the inner ring of the rolling bearing, and an outer cylinder fitting the outer ring of the rolling bearing. The cylinder and the outer cylinder are supported by a rolling bearing so as to be relatively rotatable (see, for example, Patent Document 1 and Patent Document 2). In the rolling bearing device described in Patent Document 1, a shaft (inner cylinder), an inner ring, a housing (outer cylinder), and an outer ring are joined by an adhesive, respectively. In the rolling bearing device described in Patent Document 2, the shaft and the inner ring are anaerobic. It is joined by a sex adhesive.

Japanese Patent Laid-Open No. 11-182543 JP 2000-346085 A

  However, anaerobic adhesives have many outgas components, and if outgas adheres to a magnetic disk of a hard disk drive (HDD) in which a rolling bearing device is used, it may affect recording and reproduction. In addition, anaerobic adhesives have a disadvantage of low productivity because of a long curing time. In addition, when the shaft and inner ring and the housing and outer ring are joined with an adhesive as in the conventional rolling bearing device, the rigidity of the adhesive fluctuates due to temperature changes, which changes the preload and fluctuates the resonance frequency and torque. There is an inconvenience.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a rolling bearing device that improves productivity and reduces outgas and prevents the occurrence of resonance frequency fluctuations and torque fluctuations.

In order to achieve the above object, the present invention provides the following means.
The present invention includes an inner ring and an outer ring arranged coaxially, and a plurality of rolling elements arranged in the annular space between the inner ring and the outer ring at intervals in the circumferential direction, with an interval in the axial direction. Two rolling bearings arranged, a first member fitted to the inner ring of the rolling bearing, and a second member having a fitting hole for fitting the outer ring of the rolling bearing, At least one place of the fitting portion between the inner ring and the first member and the fitting portion between each outer ring and the second member is laser welded, and the inner ring and the inner ring in the fitting portion laser-welded Provided is a rolling bearing device in which the center of laser welding is shifted with respect to a boundary between a first member and a boundary between the outer ring and the second member.

  According to the present invention, each outer ring of two rolling bearings in which the first member is fitted to each inner ring is fitted to the second member, respectively, and a fitting portion between the inner ring and the first member or the outer ring By laser welding the fitting portion with the second member, the first member and the second member are supported by the rolling bearing so as to be relatively rotatable.

  In this case, thermal stress tends to concentrate at the center of laser welding when the melted member cools and contracts, and the boundary between the members in the welded portion is low in rigidity, so the inner ring and the first member When the welded inner ring and the first member or the melted outer ring and the second member are cooled and contracted by laser welding with the laser welding center shifted from the boundary of the outer ring or the boundary between the outer ring and the second member Further, it is possible to prevent the thermal stress from concentrating on these boundaries, and to prevent the weld from cracking. Moreover, the joint strength of a fitting part can be improved by preventing generation | occurrence | production of the crack in a welding part.

Further, by fixing the fitting portions by laser welding, it is possible to prevent outgassing as in the case of fixing these fitting portions using an anaerobic adhesive and to fix the fitting portions. Productivity can be improved by shortening the time. Further, it is possible to avoid a preload change caused by a change in the rigidity of the adhesive due to a temperature change as in the case where an adhesive is used, and to stabilize the resonance frequency and torque.
The center of laser welding may be shifted to the inner ring side or the outer ring side, or may be shifted to the first member side or the second member side.

  In the above invention, the center of the laser welding is 1/8 or more and 3/8 or less of the diameter of the welded portion from the boundary between the inner ring and the first member or the boundary between the outer ring and the second member. It is good also as arrange | positioning shifting distance.

  If the center of laser welding is shifted from the boundary between the inner ring and the first member or the boundary between the outer ring and the second member by a distance of 1/8 or less of the diameter of the welded portion, there is a probability that a crack will occur in the welded portion. high. On the other hand, if the center of laser welding is shifted from these boundaries by a distance of 3/8 or more of the diameter of the weld, sufficient joint strength to fix the fitting portion cannot be obtained. Therefore, by shifting the center of laser welding from these boundaries by a distance of 1/8 or more and 3/8 or less of the diameter of the welded portion, it is possible to prevent cracks from occurring in the welded portion and to sufficiently join the fitting portions. Strength can be secured.

  The present invention includes an inner ring and an outer ring that are coaxially arranged, and a plurality of rolling elements that are arranged in the annular space between the inner ring and the outer ring at intervals in the circumferential direction, with an interval in the axial direction. Two rolling bearings arranged, a first member fitted to the inner ring of the rolling bearing, a second member having a fitting hole for fitting the outer ring of the rolling bearing, the inner ring, and Laser welding is performed by shifting the center of laser welding from the boundary between the first member and the second member, which are disposed adjacent to at least one of the outer rings in the axial direction and are adjacent in the radial direction. Provided is a rolling bearing device including a fixed member.

  According to the present invention, the inner ring or the outer ring disposed adjacent to the fixing member can be fixed in the axial direction by laser welding the fixing member to the first member or the second member. In this case, since the fixing member is physically separated from the inner ring or the outer ring, the thermal deformation of the fixing member is not transmitted to the inner ring or the outer ring at the time of laser welding, and it is possible to prevent the thermal deformation from occurring in these members. Therefore, it is possible to fix the fitting portion without deteriorating the roundness of the inner ring or the outer ring, improve productivity and reduce outgas, and prevent the occurrence of resonance frequency fluctuation and torque fluctuation.

In the above invention, the fixing member may be an inner ring side ring for fitting the first member or an outer ring side ring fitted to the second member.
With such a configuration, the radial movement of the inner ring side ring or the outer ring side ring is restricted by the first member or the second member, so that the inner ring side ring or the outer ring side ring can be accurately fixed. it can. Further, the axial displacement of the inner ring or the outer ring over the entire circumferential direction can be prevented by the inner ring or the outer ring side ring.

  Further, in the above invention, a spacer portion sandwiched in the axial direction is provided between one of the inner rings or the outer rings, and the other inner ring or the outer ring is relative to the inner ring or the outer ring adjacent in the axial direction. It is good also as being fixed to the 1st member or the 2nd member in the state pressed in the direction which adjoins.

  By configuring in this way, a gap corresponding to the length of the spacer portion is formed between the other outer rings or the inner rings by sandwiching the spacer part between the inner rings or the outer rings, so the other inner ring Alternatively, by simply pressing the outer ring in the axial direction, the inner rings or the outer rings can be brought close to each other to apply preload to the two rolling bearings. Therefore, by applying laser welding while pressing the inner ring or the outer ring, it is possible to easily maintain the state in which the rolling bearing is preloaded.

  According to the present invention, it is possible to improve productivity, reduce outgas, and prevent the occurrence of resonance frequency fluctuation and torque fluctuation.

It is a longitudinal cross-sectional view of the rolling bearing apparatus which concerns on one Embodiment of this invention. It is the longitudinal cross-sectional view which cut | disconnected the fitting part of the inner ring | wheel and shaft of FIG. 1 to the axial direction. It is a perspective view which shows the fitting part of the inner ring | wheel of FIG. 1, and a shaft. It is the longitudinal cross-sectional view which cut | disconnected the fitting part of the inner ring | wheel and shaft of FIG. 3 to the axial direction. It is a perspective view which shows the fitting part of the inner ring | wheel and shaft as a reference example. It is the figure which showed the relationship between the position of a keyhole, and the incidence rate of a crack. It is the figure which showed the relationship between the position of a keyhole, and joining strength. It is another figure which showed the relationship between joining strength and the position of a keyhole. It is a perspective view which shows the fitting part of the inner ring | wheel and shaft as a modification of one Embodiment of this invention. It is a longitudinal cross-sectional view of the rolling bearing apparatus which concerns on the modification of one Embodiment of this invention.

Hereinafter, a rolling bearing device according to an embodiment of the present invention will be described with reference to the drawings.
The rolling bearing device 10 according to the present embodiment is for swinging a swing arm or the like used in a magnetic recording device (HDD), an optical recording device, or the like, for example, as shown in FIG. This rolling bearing device 10 includes a first rolling bearing 1A and a second rolling bearing 1B (hereinafter referred to as a first rolling bearing 1A and a second rolling bearing 1B) that are arranged coaxially with an interval in the axial direction. "Rolling bearings 1A and 1B"), a shaft (first member) 13 fitted to these rolling bearings 1A and 1B, and a sleeve having a fitting hole 25 for fitting the rolling bearings 1A and 1B. (Second member) 23.

  The first rolling bearing 1A includes an inner ring 3a and an outer ring 5a that are arranged coaxially, and a plurality of rolling elements 7 that are built in an annular space between the inner ring 3a and the outer ring 5a with a circumferential interval therebetween. And. In addition, the rolling element 7 is hold | maintained so that rolling is possible in the state arrange | positioned at equal intervals by the retainer which is not shown in figure.

  A deep groove type or angular type inner ring raceway is provided on the outer peripheral surface of the inner ring 3a of the first rolling bearing 1A. Further, a deep groove type or angular type outer ring raceway is provided on the inner peripheral surface of the outer ring 5a.

  A shaft 13 is fitted to the inner ring 3a. As shown in FIG. 2, the fitting portion between the inner ring 3a and the shaft 13 is fixed by laser welding applied to a portion where the outer peripheral surface of the shaft 13 and the end surface of the inner ring 3a intersect. In the drawing, reference numeral 33 indicates a welded portion between the laser welded members (hereinafter, the welded portion is referred to as “weld”).

  In the weld 33, as shown in FIGS. 3 and 4, the center of laser welding (hereinafter, the center of laser welding is referred to as “keyhole”) H is the boundary between the inner ring 3a and the shaft 13 (hereinafter referred to as members). The boundary is referred to as “member boundary K”) and is arranged at a predetermined distance from the end face side of the inner ring 3a. As the shift amount of the keyhole H, a distance of 1/8 to 3/8 of the diameter of the weld 33 (hereinafter referred to as “weld diameter”) D from the member boundary K is preferable. The weld diameter D is the length of the major axis of the substantially elliptical weld 33 shown in FIGS. A plurality of welds 33 are arranged at intervals in the circumferential direction in the same fitting portion.

  The outer ring 5 a is fitted in the fitting hole 25 of the sleeve 23. These fitting portions are fixed by laser welding applied to a portion where the inner peripheral surface of the fitting hole 25 intersects the end surface of the outer ring 5a. Also in the weld 33 at the fitting portion between the outer ring 5 a and the fitting hole 25, the keyhole H is arranged so as to be shifted from the member boundary K.

  Similar to the first rolling bearing 1A, the second rolling bearing 1B includes an inner ring 3b and an outer ring 5b, rolling elements 7, and a retainer (not shown). A deep groove or angular inner ring raceway is provided on the outer peripheral surface of the inner ring 3b, and a deep groove or angular outer ring raceway is provided on the inner peripheral surface of the outer ring 5b.

  Further, the shaft 13 is fitted to the inner ring 3b, and the outer ring 5b is fitted to the fitting hole 25 of the sleeve 23, and these fitting portions are fixed to laser welding, respectively. Further, in the weld 33 of each fitting portion, the keyhole H is arranged so as to be shifted from the member boundary K.

  The shaft 13 is a substantially columnar member or a substantially cylindrical member, and is provided with a flange-like flange portion 15 protruding outward in the radial direction over the entire circumference at one end in the axial direction. The shaft 13 is fitted with the first rolling bearing 1A and the second rolling bearing 1B in order from the flange portion 15 side, and the end surface of the inner ring 3a of the first rolling bearing 1A is abutted against the flange portion 15. ing.

  Further, the inner rings 3a and 3b of the rolling bearings 1A and 1B are fixed to the shaft 13 in a state where they are pressed in directions close to each other. As a result, a preload is applied to the rolling bearings 1A and 1B, and the inner rings 3a and 3b and the outer rings 5a and 5b and the rolling elements 7 are brought into contact with no gap.

  On the inner surface of the fitting hole 25 of the sleeve 23, a convex portion (hereinafter referred to as “spacer portion”) 27 that protrudes inward is provided at the approximate center in the axial direction. The fitting hole 25 is fitted with the first rolling bearing 1A on one side in the axial direction and the second rolling bearing 1B on the other side of the spacer portion 27, and the end faces of the outer rings 5a and 5b facing each other. Are abutted against the spacer portion 27. Hereinafter, the portion of the fitting hole 25 in which the first rolling bearing 1A is fitted is referred to as “first fitting portion 29A”, and the portion in which the second rolling bearing is fitted is referred to as “second fitting”. Part 29B ".

Next, a method for assembling the rolling bearing device 10 according to this embodiment configured as described above will be described.
First, the shaft 13 is fitted to the inner ring 3 a of the first rolling bearing 1 </ b> A, and the end surface of the inner ring 3 a is abutted against the flange portion 15. Then, a portion of the fitting portion where the end surface opposite to the end surface abutted against the flange portion 15 of the inner ring 3a and the outer peripheral surface of the shaft 13 are laser-welded, and the inner ring 3a and the shaft 13 are fitted. Fix the joint.
In this case, laser welding is performed by shifting the keyhole H from the member boundary K to the end face side of the inner ring 3a.

  Here, in the keyhole H, when the melted members (in this case, the inner ring 3a and the shaft 13) are cooled and contracted, thermal stress is likely to be concentrated, and in the weld 33, the vicinity of the member boundary K is particularly rigid. Low. Therefore, for example, as shown in FIG. 5 as a reference example, when the keyhole H and the member boundary K substantially coincide with each other, the keyhole H is disposed at a distance of 1/8 or less of the weld diameter D from the member boundary K. In this case, as shown in FIG. 6, the probability that the weld 33 will crack is very high.

  Further, when the keyhole H is too far away from the member boundary K, such as when the laser beam is irradiated almost only on the end face of the inner ring 3a (specifically, a distance of 3/8 or more of the weld diameter D from the member boundary). In the case where the keyhole H is disposed), the crack generation rate is low, but the amount of penetration into the shaft 13 is small, so that it is sufficient to fix the fitting portion as shown in FIG. Bonding strength cannot be obtained. In the figure, symbol ◎ indicates that the practical strength is significantly exceeded, symbol ◯ indicates that practical strength can be obtained, and symbol x indicates that practical strength cannot be obtained.

  In contrast, in the rolling bearing device 10 according to the present embodiment, laser welding is performed by shifting the keyhole H from the member boundary K by a predetermined distance, specifically, a distance of 1/8 to 3/8 of the weld diameter D. By doing so, when the melted inner ring 3a and the shaft 13 are cooled and contracted, it is possible to prevent thermal stress from concentrating on the member boundary K and to prevent the weld 33 from cracking (FIG. 6). reference). Furthermore, as shown in FIG. 8, when there is no crack in the weld 33, the bonding strength can be greatly improved, and even if a crack occurs, a sufficient bonding strength can be secured at the fitting portion. Yes (see FIG. 7). In FIG. 8, the vertical axis indicates the bonding strength, and the horizontal axis indicates the position of the keyhole H.

  Next, the outer ring 5 b of the second rolling bearing 1 B is fitted into the second fitting part 29 B of the sleeve 23, and the end surface of the outer ring 5 b is abutted against the spacer part 27 of the fitting hole 25. Then, a portion of the fitting portion where the end surface opposite to the end surface abutted against the spacer portion 27 of the outer ring 5b and the inner peripheral surface of the fitting hole 25 intersect is laser-welded to fit the outer ring 5b. A fitting part with the hole 25 is fixed. In this case, similarly to the fitting portion between the inner ring 3 a and the shaft 13, the keyhole H is shifted with respect to the member boundary K and laser welding is performed.

  Next, in a state where the shaft 13 fitted in the first rolling bearing 1A is fixed so that the flange portion 15 faces vertically downward, the sleeve 23 in which the second rolling bearing 1B is fitted is fitted. Specifically, the shaft 13 is fitted to the inner ring 3b of the second rolling bearing 1B fitted into the sleeve 23, and the outer ring 5a of the first rolling bearing 1A fitted with the shaft 13 is fitted to the first rolling bearing 1B. The end portion of the outer ring 5 a is abutted against the spacer portion 27 by being fitted to the fitting portion 29 </ b> A.

  In this state, the portion of the fitting portion between the outer ring 5a and the fitting hole 25 where the end surface opposite to the end surface abutted against the spacer portion 27 of the outer ring 5a and the inner peripheral surface of the fitting hole 25 intersect. Are welded to fix the outer ring 5 a and the fitting hole 25 of the sleeve 23. Here, similarly to the fitting portion between the outer ring 5a and the fitting hole 25, the keyhole H is shifted with respect to the member boundary K and laser welding is performed.

Subsequently, the fitting portion between the inner ring 3b and the shaft 13 is joined by laser welding.
Here, a gap corresponding to the length of the spacer portion 27 is formed between the inner rings 3a and 3b by the spacer portion 27 sandwiched between the outer rings 5a and 5b of the rolling bearings 1A and 1B. A preload is applied to the rolling bearings 1A and 1B by pressing the inner ring 3b toward each other.

  In this case, since the inner ring 3a of the first rolling bearing 1A is abutted against the flange portion 15 of the shaft 13, the inner ring of the second rolling bearing 1B disposed on the opposite side in the axial direction with respect to the inner ring 3a. Preload can be applied to both of the rolling bearings 1A and 1B simply by pressing 3b in the axial direction.

  Therefore, in a state where the inner ring 3b is pressed in the axial direction and preload is applied to the rolling bearings 1A and 1B, a portion where the end surface of the inner ring 3b intersects with the outer peripheral surface of the shaft 13 is laser-welded. To fix. In this case, similarly to the fitting portion between the inner ring 3a and the shaft 13, the keyhole H is shifted from the member boundary K and laser welding is performed.

  In this way, the rolling bearing device 10 is completed in which the respective fitting portions of the rolling bearings 1A, 1B, the shaft 13 and the sleeve 23 are fixed by laser welding in a state where preload is applied to the rolling bearings 1A, 1B.

  As described above, according to the rolling bearing device 10 according to the present embodiment, the keyhole H is arranged with a predetermined distance from the member boundary K, thereby preventing the weld 33 from cracking. In addition, the joint strength of the fitting portion can be improved. In addition, by fixing the fitting portion by laser welding, it is possible to prevent outgassing as in the case where the fitting portion is fixed using an anaerobic adhesive, and the time required to fix the fitting portion is reduced. It can be shortened to improve productivity. Further, it is possible to avoid a preload change caused by a change in the rigidity of the adhesive due to a temperature change as in the case where an adhesive is used, and to stabilize the resonance frequency and torque.

  In the present embodiment, the keyhole H is shifted from the member boundary K to the end face side of the inner ring 3a at the fitting portion between the inner ring 3a and the shaft 13, but for example, as shown in FIG. The keyhole H may be shifted from K to the outer peripheral surface side of the shaft 13. The same applies to the fitting portion between the inner ring 3 b and the shaft 13 and the fitting portion between the outer ring 5 b and the fitting hole 25 of the sleeve 23.

  In the present embodiment, all of the fitting portions between the inner rings 3a, 3b and the shaft 13 and the fitting portions between the outer rings 5a, 5b and the sleeve 23 are laser welded. One place may be laser-welded. In this case, other fitting parts may be fixed with an adhesive. Also, fixing by laser welding and fixing by an adhesive may be used in combination.

Further, the present embodiment can be modified as follows.
For example, in the present embodiment, the inner rings 3a and 3b and the shaft 13 and the outer rings 5a and 5b and the fitting hole 25 of the sleeve 23 are directly laser-welded, but instead of this, for example, FIG. As shown in the rolling bearing device 110 shown, ring members (fixed members) 134A and 134B for fitting the shaft 13 are arranged adjacent to each other in the axial direction of the inner rings 3a and 3b, and the ring members 134A and 134B and the shaft 1 are fitted. It is good also as fixing a part by laser welding.

  In this case, laser welding may be performed by shifting the keyhole H from the member boundary K between the ring members 134A and 134B and the shaft 13. By doing in this way, the weld 33 can be prevented from cracking, and sufficient joint strength can be secured, and the fitting portion between the ring members 134A, 134B and the shaft 13 can be fixed. The inner rings 3a and 3b disposed adjacent to the ring members 134A and 134B fixed to the shaft 13 can be fixed in the axial direction. In addition, since the ring members 134A and 134B are physically separated from the inner rings 3a and 3b, the thermal deformation of the ring members 134A and 134B is not transmitted to the inner rings 3a and 3b during laser welding, and the thermal deformation occurs in these. Can be prevented. Therefore, it is possible to fix the fitting portion without deteriorating the roundness of the inner rings 3a and 3b, improve productivity and reduce outgas, and prevent the occurrence of resonance frequency fluctuation and torque fluctuation.

  In this modification, the ring members 134A and 134B arranged on the inner rings 3a and 3b side are described as examples. However, the ring member (fixing member) fitted in the fitting hole 25 of the sleeve 23 is used as the outer ring. It is good also as arrange | positioning adjacent to the axial direction of 5a, 5b, and fixing the fitting part of these ring members and the fitting hole 25 by laser welding. In addition, although an annular ring member has been illustrated and described as the fixing member, for example, an arc-shaped fixing member is employed, and a plurality of circumferentially spaced intervals with respect to the shaft 13 or the sleeve 23 are employed. The fixing member may be laser welded.

  Further, in the present embodiment, the sleeve 23 including the spacer portion 27 on the inner surface of the fitting hole 25 is described as an example of the second member, but a sleeve not including the spacer portion 27 is used instead. However, a ring-shaped spacer may be sandwiched between the inner rings 3a and 3b of the rolling bearings 1A and 1B. In this case, since a gap corresponding to the length of the spacer is formed between the outer rings 5a and 5b, the outer rings 5a and 5b are pressed in a direction to bring them close to each other, and in this state, the outer rings 5a and 5b and the fitting hole May be fixed by laser welding.

DESCRIPTION OF SYMBOLS 1A 1st rolling bearing 1B 2nd rolling bearing 3a, 3b Inner ring 5a, 5b Outer ring 7 Rolling body 10,110 Rolling bearing apparatus 13 Shaft (1st member)
23 Sleeve (second member)
25 Fitting hole 27 Spacer 33 Weld (welded part)
134A, 134B Ring member (fixing member)
H Keyhole (Center of laser welding)

Claims (5)

The inner ring and the outer ring arranged coaxially, and a plurality of rolling elements arranged in the annular space between the inner ring and the outer ring at intervals in the circumferential direction, are arranged with an interval in the axial direction 2 With two rolling bearings,
A first member fitted to the inner ring of the rolling bearing;
A second member having a fitting hole for fitting the outer ring of the rolling bearing,
At least one portion of the fitting portion between each inner ring and the first member and the fitting portion between each outer ring and the second member is laser-welded, and the inner ring in the fitting portion laser-welded A rolling bearing device in which a center of laser welding is shifted with respect to a boundary between the first member and a boundary between the outer ring and the second member.   The center of the laser welding is arranged by shifting a distance of 1/8 or more and 3/8 or less of the diameter of the welded portion from the boundary between the inner ring and the first member or the boundary between the outer ring and the second member. The rolling bearing device according to claim 1. 2 comprising an inner ring and an outer ring arranged coaxially, and a plurality of rolling elements arranged in the annular space between the inner ring and the outer ring at intervals in the circumferential direction, and arranged at intervals in the axial direction. With two rolling bearings,
A first member fitted to the inner ring of the rolling bearing;
A second member having a fitting hole for fitting the outer ring of the rolling bearing;
The center of laser welding is shifted from the boundary with respect to the first member or the second member adjacent to each other in the axial direction and adjacent to at least one of the inner ring and the outer ring in the axial direction. A rolling bearing device including a fixing member that is laser-welded.   The rolling bearing device according to claim 3, wherein the fixing member is an inner ring side ring for fitting the first member or an outer ring side ring fitted to the second member. A spacer portion sandwiched in the axial direction between one of the inner rings and the outer ring;
The other inner ring or outer ring is fixed to the first member or the second member in a state of being pressed in a direction relatively close to the inner ring or the outer ring adjacent in the axial direction. The rolling bearing device according to any one of claims 1 to 4.

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