JP2008075738A - Bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device suitable particularly for a high-rotating-speed bearing, having simple construction for supplying a required amount of oil to a required lubrication portion to reduce oil consumption while preventing the fly of oil mist to the outside, and preventing environmental pollution due to the oil mist. <P>SOLUTION: In the bearing device, an oil hole 10 is formed in an outer ring 2 to open toward the vicinity of a contact portion with rolling elements 3, an oil passage 8 is provided in communication with the oil hole 10 of the outer ring 2 for supplying oil to the oil hole 10, and an orifice member 5 having an oil jet 5a whose diameter is smaller than those of each of the oil hole 10 of the outer ring 2 and the oil passage 8 is fixed through the oil passage 8. The oil passage 8, the oil jet 5a and the oil hole 10 of the outer ring 2 are arranged on the same axial line. A relationship between the diameter of the oil jet 5a and that of the oil hole 10 of the outer ring 2 is set so that the oil introduced into the oil passage 8 is supplied from the oil jet 5a of the orifice member 5 through the oil hole 10 of the outer ring 2 to the vicinity of the contact portion. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a bearing device suitable mainly for a bearing having a high rotational shaft such as a main bearing for machine tools, and a plurality of rolling elements are provided along a circumferential direction between an outer periphery of an inner ring and an inner periphery of an outer ring. The inner ring of the rolling bearing formed by rolling contact is fixed to the outer periphery of the rotating shaft, and the outer ring is fixed to the inner periphery of the mounting hole of the case member so that the rotating shaft can freely rotate to the case member via the rolling bearing. The present invention relates to a bearing device to be supported.

As a lubrication method for the rolling shaft roller bearing, an oil supply method by oil spray, an oil supply method from an oil hole drilled in the inner ring or the outer ring, and the like are mainly employed.
FIG. 5 shows an example of an oil supply method using oil spray, 7 is a rotating shaft (7a is a rotating shaft center), 6 is a case member, and 100 is a bearing (ball bearing) that rotatably supports the rotating shaft 7 on the case member 6. ), A plurality of rolling elements 3 are in rolling contact along the circumferential direction between the outer periphery of the inner ring 1 and the inner periphery of the outer ring 2. The bearing 100 is lubricated by the spray of oil ejected from the oil passage 09 from the oil supply pipe 07 through the oil passage 012 and the oil hole 08. 05 is an oil outlet.

FIG. 6 shows an example of an oil supply method from an oil hole drilled in the inner ring, 7 is a rotation shaft (7a is a rotation axis), 6 is a case member, and 100 is rotatable about the rotation shaft 7 to the case member 6. A bearing (ball bearing) to be supported is configured by rolling a plurality of rolling elements 3 along the circumferential direction between the outer periphery of the inner ring 1 and the inner periphery of the outer ring 2. Reference numeral 4 denotes a cage for the rolling element 3.
The bearing 100 is connected to the inner ring 1 through an oil hole 011 drilled in the radial direction of the rotary shaft 7 and an oil hole 010 drilled in the inner ring 1 from an oil passage 012 formed at the center of the rotary shaft 7. The oil is lubricated by the oil jetted toward the rolling contact portion 017 with the rolling element 3.

  Further, in Patent Document 1 (Japanese Patent Application Laid-Open No. 6-264934), an oil hole that opens toward the vicinity of the rolling contact portion with the rolling element is formed in the outer ring, and oil from the main oil supply passage is drawn from the oil hole. The outer ring of the outer ring is sprayed to the side of the rolling element from a jet port that is ejected in the vicinity of the rolling contact portion and through an oil passage branched from the main oil supply passage in the axial direction of the case member. The bearing is lubricated with oil ejected from two locations of the oil hole and the ejection port.

JP-A-6-264934

In Patent Document 1 (Japanese Patent Laid-Open No. 6-264934), in the oil supply method using oil spray shown in FIG. 5, the bearing is lubricated by the spray of oil sprayed to the side portion of the bearing sprayed from the oil passage 09. Since mist-like oil mixed with gas is sprayed on the side of the bearing, the mist-like oil that has collided with the side of the bearing is likely to leak to the outside, and environmental pollution due to scattering of the oil mist to the outside Cause.
Further, in the oil supply method from the oil hole drilled in the inner ring as shown in FIG. 6, the oil ring 010 drilled in the inner ring 1 passes through the oil hole 010 in the radial direction toward the rolling contact portion 017 between the inner ring 1 and the rolling element 3. Since oil is ejected, there is a problem that when the number of rotations of the inner ring 1 and the rotating shaft 7 increases, the oil ejection amount increases more than necessary due to the increase in the oil ejection amount due to centrifugal force, and the loss increases.

  In view of the problems of the prior art, the present invention reduces the oil consumption by allowing a necessary amount of oil to be supplied to a necessary lubrication part with a simple structure, and to the outside of the oil mist. An object of the present invention is to provide a bearing device suitable for a bearing having a particularly high rotational speed, which prevents scattering and prevents environmental pollution caused by oil mist.

  The present invention achieves such an object by providing a rolling bearing formed by rolling a plurality of rolling elements along the circumferential direction between the outer circumference of the inner ring and the inner circumference of the outer ring, and rotating the inner ring of the rolling bearing. In the bearing device that is fixedly inserted into the outer periphery of the shaft and the outer ring is fixedly inserted into the inner periphery of the mounting hole of the case member, and the rotating shaft is rotatably supported by the case member via the rolling bearing. An oil passage that opens toward the contact portion between the inner ring and the rolling element or near the contact portion is formed in the outer ring, and an oil passage that communicates with the oil hole of the outer ring and supplies oil to the oil hole is formed in the case. An orifice member provided in the member and having an oil hole in the outer ring and an oil outlet having a smaller diameter than the oil passage is fixed in the oil passage so that the oil passage, the oil outlet and the oil hole in the outer ring are on the same axis. Place and The oil introduced into the oil passage passes through the oil hole of the outer ring from the oil outlet of the orifice member and is supplied to the contact portion or the vicinity of the contact portion, and the length of the oil outlet (nozzle) Considering the length of the oil hole of the outer ring, the hole diameter and length of the case member, the pipe diameter and length from the pump to the case member, the pump pressure, and the oil physical properties, the diameter of the oil outlet and the outer ring The relationship with the diameter of the oil hole is set.

  According to this invention, the oil passage of the inlet and the oil outlet of the outer ring formed in the orifice member provided in the oil passage and the oil hole of the outer ring are arranged on the same axis, and the diameter of the oil outlet and the oil hole of the outer ring are arranged. Is set so that the oil ejected from the oil outlet does not touch the inner wall of the oil hole, so that the oil that is accelerated and ejected at the oil outlet becomes the inner circumference of the oil hole of the outer ring. It can penetrate straight without contacting and reach the contact portion or the rolling contact portion between the outer ring or inner ring and the rolling element, and the contact portion between the rolling element and the outer ring or inner ring can be lubricated.

As a result, the contact portion can be stably lubricated with the minimum amount of oil without causing the oil to run out by the oil that is accelerated and ejected from the oil outlet, so that the contact portion can be stably lubricated. Oil consumption can be reduced while maintaining
Further, since oil is supplied to the contact portion from an oil hole drilled in the outer ring, it is not affected by the number of rotations of the rotary shaft unlike the means for supplying oil from the inner ring side as in the prior art of FIG. In addition, a stable lubricating action can be obtained even in a high rotational speed range.
In the prior art, since it is a gas, it easily leaks and is difficult to recover. On the other hand, in the structure proposed in this patent, oil is supplied in a liquid form, so that it is difficult to leak and is easy to collect.

In this invention, specifically, the following configuration is preferable.
(1) An oil hole of the outer ring is provided along a radial line of the rolling bearing and is opened toward the vicinity of a contact portion between the outer ring and the rolling element.
According to this configuration, the oil passage at the inlet arranged on the same axis, the oil jet hole drilled in the orifice member, and the oil hole of the outer ring can be formed along the radial line, and the oblique hole processing Is not required, and the processing of the oil passage, the oil outlet and the oil hole of the outer ring is simplified, and the number of processing steps can be reduced.

(2) The oil hole of the outer ring is provided to be inclined at a certain angle in the axial direction with respect to the radial line of the rolling bearing and is opened toward the vicinity of the contact portion between the outer ring and the rolling element.
According to this configuration, oil is injected from the oblique direction of the contact portion between the outer ring and the rolling element, so that the oil easily enters the contact portion between the rolling element, the outer ring, and the inner ring, and the bearing rolling surface is contacted. Reliable lubrication can be achieved.
Further, since the oil enters the contact portion from an oblique direction, the opening end on the bearing rolling surface side of the oil ring of the outer ring can be separated from the contact portion between the outer ring and the rolling element. The rolling elements will not be damaged by burr or burr.

(3) The oil passages, the oil outlets, and the oil holes of the outer ring disposed on the same axis are inclined at a certain angle in the circumferential direction with respect to the radial line of the rolling bearing, and the same axis is The oil is directed to the contact portion between the inner ring and the rolling element such that oil from the oil outlet is ejected in a direction of being drawn between the inner ring and the rolling element.
If comprised in this way, the oil from the oil hole of an outer ring | wheel will be ejected to the contact part of an inner ring | wheel and a rolling element in the direction in which oil is drawn between the said inner ring | wheel and a rolling element, and it is a rolling element with respect to an inner ring | wheel. The relative rotation of the oil makes it easy for oil to enter the contact portion between the rolling elements and the inner ring, and stable lubrication of the bearing rolling surface can be realized. In addition, the oil sprayed on the rolling surface of the inner ring is easily carried into the contact portion between the rolling element and the outer ring due to the centrifugal force caused by the rotation of the rolling element. From this surface, the bearing rolling surface is efficiently lubricated. realizable.

(4) Inclining the oil passages, the oil outlets, and the oil holes of the outer ring arranged on the same axis in a circumferential direction by a certain angle with respect to the radial line of the rolling bearing, The oil is directed to the contact portion between the outer ring and the rolling element so that the oil from the oil outlet is ejected in a direction of being drawn between the outer ring and the rolling element.
If comprised in this way, the oil from the oil hole of an outer ring | wheel will be ejected to the contact part of an outer ring | wheel and a rolling element in the direction in which oil is drawn between the said outer ring | wheel and a rolling element, and it is a rolling element with respect to an outer ring | wheel. The relative rotation of the oil makes it easy for oil to enter the contact portion between the rolling element and the outer ring, and stable lubrication of the bearing rolling surface can be realized.

(5) A plurality of oil passages, oil outlets and outer ring oil holes arranged on the same axis are arranged in the circumferential direction of the rolling bearing, or the oil passages arranged on the same axis and A plurality of rows of oil holes and oil holes in the outer ring are arranged in the axial direction of the rolling bearing.
If constituted in this way, the oil supply location from the oil hole of the outer ring to the bearing rolling surface becomes a plurality of locations in the circumferential direction of the bearing, and the oil is uniformly supplied in the circumferential direction of the bearing rolling surface, Lubrication performance is further improved.
Moreover, the oil supply location from the oil hole 10 of the outer ring 2 to the bearing rolling surface becomes a plurality of locations in the axial direction of the bearing, and the oil to the bearing rolling surface is supplied from the multiple locations in the axial direction, so that the lubrication performance is improved. Further improve.

According to the present invention, the oil that is accelerated at the oil outlet and ejected from the oil hole of the outer ring is stabilized at the contact portion between the rolling element and the outer ring or the inner ring with a minimum amount of oil without causing oil shortage. Thus, the amount of oil consumption can be reduced while maintaining stable lubrication of the contact portion.
In addition, since oil is supplied to the contact portion from an oil hole drilled in the outer ring, it is stable even in a high rotation speed range without being affected by the rotation speed of the rotating shaft like means for supplying oil from the inner ring side. Lubrication effect is obtained.
Further, since the contact portion can be lubricated with a minimum amount of oil corresponding to the minimum diameter flow passage narrowed down by the inner diameter of the oil jet outlet, the oil splashes after hitting the oil receiving portion of the rolling element Is suppressed, and environmental pollution due to the scattering of oil mist to the outside can be prevented.
As described above, a bearing device suitable for a high rotational speed bearing can be obtained.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

1A and 1B show a bearing device for a machine tool according to a first embodiment of the present invention, in which FIG. 1A is a partial sectional view of the bearing device along a rotation axis, and FIG. 1B is a view of FIGS. 3. It is the Z section enlarged view in FIG.
1A and 1B, reference numeral 7 denotes a rotating shaft (7a is a rotating shaft center), 6 is a casing (case member), and 100 is a bearing (ball bearing) that rotatably supports the rotating shaft 7 on the casing 6. ) Along the circumferential direction between the outer periphery of the inner ring 1 fixed to the outer periphery of the rotating shaft 7 and the inner periphery of the outer ring 2 fixed to the inner periphery of the mounting hole 6a of the casing 6. It is configured by rolling contact with a plurality of rolling elements 3 provided at equal intervals. Reference numeral 4 denotes a cage for the rolling element 3.

8 is an oil passage drilled in the casing 6, 5 is an orifice fitted in the oil passage 8, 9 is an inner peripheral oil passage drilled on the inner peripheral side of the orifice 5, and 10 is the outer ring 2. It is an oil hole perforated.
As shown in FIG. 1B, a small-diameter oil outlet 5a is drilled in the center of the orifice 5. The oil passage 8, the oil outlet 5 a of the orifice 5, the inner peripheral oil passage 9, and the oil hole 10 of the outer ring are arranged on the same axis W, and the same axis W is the same as the oil hole 10 of the outer ring. The outer ring 2 and the rolling element 3 are positioned so as to open to a portion (oil receiving portion P) that is very close to the contact portion 16.

The inner diameter d2 of the oil outlet 5a is smaller than the inner diameter d1 of the oil passage 8 and the inner diameter d3 of the oil hole 10 of the outer ring (d2 <d1, d2 <d3). The inner diameter d4 of the passage 9 is formed larger than the inner diameter d3 of the oil hole 10 of the outer ring (d3 <d4).
Furthermore, the relationship between the inner diameter d2 of the oil outlet 5a and the inner diameter d3 of the oil hole 10 of the outer ring is as follows:
The oil introduced into the oil passage 8 does not come into contact with the inner wall of the oil hole 10 and the inner wall of the inner peripheral oil passage 9 from the oil outlet 5a of the orifice 5 through the oil hole 10 of the outer ring. It is set so as to pass through the inner peripheral oil passage 9 and the oil hole 10 of the outer ring and reach the oil receiving portion adjacent to the contact portion 16.

Further, the oil hole 10 of the outer ring is provided along the radial line V of the rolling bearing and is opened toward the oil receiving portion adjacent to the contact portion 16.
With this configuration, the oil passage 8 on the inlet side disposed on the same axis W, the oil outlet 5a perforated in the orifice 5, the oil passage 9 on the inner peripheral side, and the oil hole 10 on the outer ring along the radial line. Therefore, the machining of the oil passages 8, 9, the oil outlet 5a and the oil hole 10 of the outer ring is simplified, and the number of processing steps of the bearing can be reduced.

  According to the first embodiment described above, the inlet oil passage 8, the oil outlet 5 a drilled in the orifice 5 provided in the oil passage 8, the inner peripheral oil passage 9, and the outer ring oil hole 10 are arranged on the same axis. The oil jet 5a is disposed on W, the oil jet 5a is set to the minimum diameter d2, and the relationship between the inner diameter d2 of the oil jet 5a and the diameter d3 of the oil hole 10 of the outer ring is the oil jetted from the oil jet 5a. Is set so as not to touch the inner wall of the oil hole 10, the oil that is accelerated and ejected at the oil outlet 5 a penetrates straight without contacting the inner periphery of the oil hole 10 of the outer ring. Thus, the oil receiving part P in the vicinity of the contact part 16 between the outer ring 2 and the rolling element 3 can be reached, and the contact part between the rolling element 3 and the outer ring 2 and the inner ring 1 can be lubricated.

Thereby, the contact portion 16 can be stably lubricated with the minimum amount of oil without causing oil shortage by the oil that is accelerated and ejected from the oil outlet 5a. Oil consumption can be reduced while maintaining stable lubrication at the contact portion.
Further, since oil is supplied to the contact portion 16 from the oil hole 10 drilled in the outer ring 2, the rotational speed of the rotary shaft 7 can be adjusted like means for supplying oil from the inner ring 1 side as in the prior art of FIG. Without being affected, a stable lubricating action can be obtained even in a high rotational speed range.
Further, since the contact portion 16 can be lubricated with a minimum amount of oil corresponding to the flow path of the minimum diameter that is narrowed down by the inner diameter of the oil jet outlet 5a, The scattering of oil is suppressed, and the occurrence of environmental pollution due to the scattering of oil mist to the outside as in the prior art can be prevented.

FIG. 2 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.
In the second embodiment, the oil hole 10 of the outer ring 2 is provided at an angle of α with respect to the radial line V of the rolling bearing and is provided at a contact portion between the outer ring 2 and the rolling element 3. 16 is opened toward the oil receiving portion adjacent to 16.
Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals.
When configured as in the second embodiment, the following specific effects can be obtained.
That is, since the oil is injected from the oblique direction of the oil receiving portion P in the vicinity of the contact portion 16 between the outer ring 2 and the rolling element 3, the oil easily enters the contact portion between the rolling element 3, the outer ring 2 and the inner ring 1. Stable lubrication of the bearing rolling surface can be realized.
Further, since the opening end on the bearing rolling surface side of the oil hole 10 of the outer ring 2 can be separated from the contact portion 16 between the outer ring 2 and the rolling element 3, burrs, burr, etc. generated by the processing of the oil hole 10 can be achieved. Will not damage the rolling elements.

FIG. 3 shows a third embodiment of the present invention, and is a view of the bearing viewed in a direction perpendicular to the rotation axis.
In this third embodiment, the oil passage 8, the oil outlet 5 a, the inner peripheral oil passage 9, and the oil hole 10 of the outer ring arranged on the same axis W are connected to the radial line V of the rolling bearing. Inclined by a certain angle in the circumferential direction, the same axis W is brought into contact with the inner ring 1 and the rolling element 3, and the oil from the oil hole 10 flows between the rotation direction n of the rolling element 3 and the inner ring 1. It is oriented to be ejected in the direction of being pulled in between. That is, it is injected in the direction of being drawn into the contact portion by the relative rotation generated between the rolling element 3 and the inner ring 1. N indicates the rotation direction of the rotation shaft.
Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals.

  According to the third embodiment, the oil from the oil hole 10 of the outer ring 2 is drawn into the contact portion 19 between the inner ring 1 and the rolling element 3 between the inner ring 1 and the rolling element 3. By ejecting in the direction in which the oil is discharged, the oil easily enters the contact portion 19 between the rolling element 3 and the inner ring 1 due to the relative rotation of the rolling element 3 with respect to the inner ring 1, and stable lubrication of the bearing rolling surface can be realized. . In addition, the oil sprayed on the rolling surface of the inner ring 1 is easily carried into the contact portion between the rolling element 3 and the outer ring 2 due to the centrifugal force generated by the rotation of the rolling element 3, and the bearing rolling surface also from this surface. Efficient lubrication can be achieved.

FIG. 6 is a view corresponding to FIG. 3 showing a fourth embodiment of the present invention.
In the fourth embodiment, the oil passage 8, the oil outlet 5 a, the inner peripheral oil passage 9 and the oil hole 10 of the outer ring disposed on the same axis W are connected to the radial line V of the rolling bearing. The same axis W is inclined at a constant angle in the circumferential direction, and the oil from the oil hole 10 is moved in the rotational direction n of the rolling element 3 and the outer ring 2 at the contact portion between the outer ring 2 and the rolling element 3. It is oriented to be ejected in the direction of being pulled in between. That is, it is injected in the direction of being drawn into the contact portion by the relative rotation generated between the rolling element 3 and the outer ring 2. N indicates the rotation direction of the rotation shaft.
According to this fourth embodiment, oil from the oil hole 10 of the outer ring 2 is drawn into the contact portion 16 between the outer ring 2 and the rolling element 3 between the outer ring 2 and the rolling element 3. By ejecting in the direction in which the oil is discharged, the oil easily enters the contact portion 16 between the rolling element 3 and the outer ring 2 due to the relative rotation of the rolling element 3 with respect to the outer ring 2, thereby realizing stable lubrication of the bearing rolling surface. .

In the first to fourth embodiments, the oil passage 8, the oil outlet 5 a, the inner peripheral oil passage 9, and the oil hole 10 of the outer ring disposed on the same axis W are preferably arranged on the circumference of the rolling bearing. Install two or more sets at equal intervals in the direction.
If comprised in this way, the oil supply location from the oil hole 10 of the outer ring | wheel 2 to a bearing rolling surface will be two or more locations in the circumferential direction of a bearing, and oil will be supplied uniformly in the circumferential direction of a bearing rolling surface. Thus, the lubrication performance is further improved.

In the first to fourth embodiments, the oil passage 8, the oil outlet 5 a, the inner peripheral oil passage 9 and the oil hole 10 of the outer ring disposed on the same axis W are preferably arranged in the axial direction of the rolling bearing. Install multiple rows in
If comprised in this way, the oil supply location from the oil hole 10 of the outer ring | wheel 2 to a bearing rolling surface will be several places in the axial direction of a bearing, and the oil to a bearing rolling surface will be supplied from several places of an axial direction. Thus, the lubrication performance is further improved.

  According to the present invention, with a simple structure, it is possible to supply a necessary amount of oil to a necessary lubricating portion, thereby reducing oil consumption and preventing the oil mist from scattering to the outside. It is possible to provide a bearing device that is suitable for a bearing having a particularly high rotational speed and that prevents environmental pollution caused by oil mist.

1 shows a bearing device for a machine tool according to a first embodiment of the present invention, in which (A) is a partial sectional view of the bearing device along the rotation axis, and (B) is FIG. 1 (A), FIG. 2, FIG. 4 is an enlarged view of a Z portion in FIG. FIG. 3 is a view corresponding to FIG. 1 showing a second embodiment of the present invention. It is the figure which showed 3rd Example of this invention and looked at the bearing in the direction orthogonal to the rotating shaft center. FIG. 6 is a view corresponding to FIG. 3 showing a fourth embodiment of the present invention. It is a fragmentary sectional view which follows the rotating shaft center of the bearing part which shows the 1st example of a prior art. It is a figure corresponding to FIG. 1 which shows the 1st example of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner ring 2 Outer ring 3 Rolling element 4 Cage 5 Orifice 5a Oil outlet 6 Casing 7 Rotating shaft 8 Oil passage 9 Inner peripheral side oil passage 10 Oil hole 16, 19 Contact part 100 Bearing (ball bearing)
P Oil receiver W Same axis V Radial direction line

Claims (7)

  A rolling bearing is provided by rolling a plurality of rolling elements along the circumferential direction between the outer circumference of the inner ring and the inner circumference of the outer ring, and the inner ring of the rolling bearing is fixed to the outer circumference of the rotating shaft and the outer ring is fixed. In the bearing device that is fixedly inserted into the inner periphery of the mounting hole of the case member and rotatably supports the rotating shaft on the case member via the rolling bearing, the contact portion or contact between the outer ring or inner ring and the rolling element An oil hole that opens toward the vicinity of the portion is formed in the outer ring, and an oil passage that communicates with the oil hole of the outer ring and supplies oil to the oil hole is provided in the case member. The oil introduced into the oil passage is fixed by inserting an orifice member having an oil outlet smaller in diameter than the oil hole and the oil passage, and arranging the oil passage, the oil outlet and the oil hole of the outer ring on the same axis. Before The relationship between the diameter of the oil outlet and the diameter of the oil hole of the outer ring was set so as to pass through the oil hole of the outer ring from the oil outlet of the orifice member and be supplied to the contact portion or the vicinity of the contact portion. A bearing device characterized by that.   The bearing device according to claim 1, wherein an oil hole of the outer ring is provided along a radial line of the rolling bearing and is opened toward the vicinity of a contact portion between the outer ring and the rolling element.   The oil hole of the outer ring is provided to be inclined at a certain angle in the axial direction with respect to a radial direction line of the rolling bearing, and is opened toward the contact portion between the outer ring and the rolling element. The bearing device according to 1.   The oil passages, the oil outlets, and the oil holes of the outer ring disposed on the same axis are inclined at a certain angle in the circumferential direction with respect to the radial line of the rolling bearing, and the same axis is rotated with the inner ring. The bearing device according to claim 1, wherein the oil is directed to a contact portion with a moving body so that oil from the oil outlet is ejected in a direction of being drawn between the inner ring and the rolling element.   The oil passages, the oil outlets, and the oil holes of the outer ring disposed on the same axis are inclined at a certain angle in the circumferential direction with respect to the radial line of the rolling bearing, and the same axis is rotated with the outer ring. The bearing device according to claim 1, wherein the oil is directed toward a contact portion with a moving body so that oil from the oil outlet is ejected in a direction of being drawn between the outer ring and the rolling element.   The oil passage, the oil outlet, and the oil hole of the outer ring arranged on the same axis are arranged in a plurality in the circumferential direction of the rolling bearing. Bearing device.   The bearing according to any one of claims 1 to 5, wherein the oil passages, the oil outlets, and the oil holes of the outer ring arranged on the same axis are arranged in a plurality of rows in the axial direction of the rolling bearing. apparatus.

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