WO2020080048A1 - Angular ball bearing - Google Patents

Angular ball bearing Download PDF

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Publication number
WO2020080048A1
WO2020080048A1 PCT/JP2019/037403 JP2019037403W WO2020080048A1 WO 2020080048 A1 WO2020080048 A1 WO 2020080048A1 JP 2019037403 W JP2019037403 W JP 2019037403W WO 2020080048 A1 WO2020080048 A1 WO 2020080048A1
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WO
WIPO (PCT)
Prior art keywords
pocket
diameter side
ball
cage
ball bearing
Prior art date
Application number
PCT/JP2019/037403
Other languages
French (fr)
Japanese (ja)
Inventor
和巳 岩▲崎▼
美昭 勝野
修二 曽我
Original Assignee
日本精工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本精工株式会社 filed Critical 日本精工株式会社
Publication of WO2020080048A1 publication Critical patent/WO2020080048A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication

Definitions

  • the present invention relates to an angular contact ball bearing, and more particularly, to an angular contact ball bearing equipped with a ball guide type cage, which is applicable to a spindle device of a machine tool or a motor.
  • Angular contact ball bearings are widely used in machine tool spindles.
  • cages used for angular ball bearings outer ring guide type, inner ring guide type, and ball guide type are known.
  • the ball guide system has a relatively good lubricity because the gap between the bearing ring and the cage can be increased and the lubricant can be easily supplied between the ball and the inner surface of the pocket (for example, , Patent Document 1).
  • the shape error of the inner ring raceway surface and the outer ring raceway surface on which the ball rolls, the shape error of the ball itself, or the center of the inner ring and outer ring of the bearing Due to misalignment or inclination of the shaft, the balls are slightly delayed or advanced for each ball and come into contact with the inner surface of the cage pocket.
  • FIG. 4 (b) shows a schematic view of the so-called ball guide type cage of the ball guide type when the inner surface of the pocket contacts the balls.
  • a frictional force Fr is generated in the cage 14.
  • the cage may vibrate in the radial direction, which is the direction of the frictional force Fr, to generate noise called cage noise.
  • the present invention has been made in view of the problems described above, and an object thereof is to provide an angular ball bearing including a ball guide type cage capable of suppressing cage noise.
  • An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a rollable arrangement having a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface.
  • An angular contact ball bearing comprising: a plurality of balls and a cage of a ball guide type having a pocket for rotatably holding the plurality of balls;
  • the retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction,
  • the cage inner diameter is equal over the entire circumference of the pocket,
  • the pocket includes a cylindrical surface and an outer diameter side lip portion provided on the outer diameter side of the pocket, 1/2 of the cage inner diameter in the inner diameter side opening is B, the pitch circle diameter of the balls is PCD,
  • a Angular contact ball bearing characterized by satisfying.
  • An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a rollable arrangement having a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface.
  • An angular contact ball bearing comprising: a plurality of balls and a cage of a ball guide type having a pocket for rotatably holding the plurality of balls;
  • the retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction, At the inner diameter side opening of the pocket, the cage inner diameter is equal over the entire circumference of the pocket,
  • the pocket includes a cylindrical surface and an inner diameter side lip portion provided on the inner diameter side of the pocket and on the circumferential side of the cage.
  • the ball guide type cage can be stably driven to rotate, and the cage noise generated from the cage can be suppressed.
  • FIG. 1A is a cross-sectional view corresponding to FIG. 1 showing a force acting on a contact portion between a ball and a cage due to radial direction vibration in the cage of the present embodiment
  • FIG. 1 It is sectional drawing equivalent to FIG. 1 which shows the force which acts on the contact part of a ball and a cage by radial direction vibration.
  • FIG. 7 is a sectional view taken along line VII-VII of FIG. 5. It is a principal part sectional drawing of the angular contact ball bearing which concerns on 3rd Embodiment of this invention.
  • FIG. 9 is a partially enlarged perspective view showing a pocket shape of the cage shown in FIG. 8. It is a principal part sectional drawing of the angular contact ball bearing which concerns on 4th Embodiment of this invention.
  • FIG. 11A is a partially enlarged perspective view showing the pocket shape of the cage shown in FIG. 10, and FIG. 11B is a XI arrow view of FIG.
  • FIG. 11 is a cross-sectional view showing the dimensional relationship between the cage and the balls in the cross section taken along the line XII-XII in FIG. 10.
  • an angular contact ball bearing 10 of the first embodiment has an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, an outer ring raceway surface 11a and an outer ring raceway surface 11a. It is provided with a plurality of balls 13 rotatably arranged between the inner ring raceway surfaces 12a with a predetermined contact angle ⁇ , and a retainer 14 rotatably holding the plurality of balls 13.
  • a counterbore 11b is formed in the outer ring 11 on one axial side (bearing front side) with respect to the outer ring raceway surface 11a. Further, the inner ring 12 is formed with a counter bore 12b on the other side in the axial direction (axial rear side) with respect to the inner ring raceway surface 12a.
  • the cage 14 includes a pair of annular portions 15 and 16 and a plurality of annular portions 15 and 16 which are axially connected to each other and are arranged at predetermined intervals in the circumferential direction. And a pillar portion 17 of.
  • a pocket 20 for rotatably holding the ball 13 is formed between the pair of annular portions 15 and 16 and the adjacent column portion 17.
  • the inner peripheral surface of the retainer 14 has the same inner diameter over the entire retainer 14 including the pair of annular portions 15 and 16 and the plurality of column portions 17, and the outer peripheral surface also has the same inner diameter.
  • the cage 14 has the same outer diameter throughout the cage 14. Therefore, the inner diameter side opening 21 of each pocket 20 has the same cage inner diameter over the entire circumference of the pocket 20.
  • the pocket 20 is provided on the cylindrical surface 23 whose center axis L1 (see FIG. 3) extends in the radial direction, on the outer diameter side of the pocket 20 and on the circumferential side of the cage 14, and faces each other in the circumferential direction. And a pair of outer diameter side lip portions 24.
  • the cage 14 is a ball guide type cage in which the outer diameter side lip portion 24 contacts the ball 13 and is guided by the ball 13 when the cage 14 moves in the radial direction.
  • Each outer diameter side lip portion 24 is continuous with the lip portion cylindrical surface 26 provided on the inner diameter side from the outer diameter side opening portion 25 of the pocket 20 on the inner diameter side with the lip portion cylindrical surface 26, and the lip portion cylindrical surface 26 and the cylinder. And an inclined surface 27 that connects the surface 23.
  • the lip portion cylindrical surface 26 is a partial cylindrical surface concentric with the cylindrical surface 23 and has a smaller diameter than the cylindrical surface 23.
  • the inclined surface 27 prevents edge contact when the ball 13 and the cage 14 relatively move in the radial direction and the ball 13 and the outer diameter side lip portion 24 come into contact with each other.
  • a boundary line 28 between the cylindrical surface 23 and the outer diameter side lip portion 24 extends along the circumferential direction of the pocket 20.
  • the outer diameter side lip portions 24 provided near the circumferential direction of the cage 14 are arranged symmetrically in the circumferential direction on the outer diameter side of the pocket 20 with respect to the axially intermediate portion of the inner surface of the pocket 20.
  • the size is set so that it does not exceed the middle portion in the circumferential direction of the inner surface.
  • the outer diameter side lip portion 24 of the present embodiment includes the axially intermediate portion of the inner surface of the pocket 20, and has a circumference within a phase range of less than ⁇ 45 ° with respect to the axially intermediate portion of the inner surface of the pocket 20. It is provided along the direction.
  • the cage 14 may be made of synthetic resin, metal, or the like. Further, the processing method of the cage 14 may be either cutting processing or injection molding.
  • the cage 14 made of synthetic resin may be a phenol resin containing a base material. In this case, as the base material, paper, cotton cloth, asbestos cloth, glass fiber cloth, nylon fabric is used for the laminated board, and wood powder, cotton, pulp, asbestos, mica, glass fiber and the like are used for the molded product.
  • the cage 14 may be a resin such as polyamide, polyacetal, polyetheretherketone, polyimide, or polyphenylene sulfide. If necessary, a reinforcing material such as glass fiber, carbon fiber or aramid fiber may be added to the resin. May be. Further, the cage 14 may be made of iron plated with copper alloy or silver.
  • 1/2 of the cage inner diameter in the inner diameter side opening 21 is B
  • the pitch circle diameter of the balls 13 is PCD
  • ⁇ is the shortest line (center axis line of the pocket 20) L1 connecting the rotation axis X of the angular ball bearing 10 and the center O of the ball 13, the rotation axis X of the angular ball bearing 10 and the inner diameter side opening 21 of the pocket 20. Is an angle formed by a straight line L2 connecting the farthest portions R in the circumferential direction.
  • the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14 is a virtual plane including the central axis L1 of the pocket 20 and the rotation axis X of the angular ball bearing 10. It is formed in such a size that it does not interfere with the ball 13 when the ball 13 comes into contact with the cylindrical surface 23 by moving relative to the vertical direction relative to PL.
  • the ball 13 rotationally drives the cage 14 via the inner surface of the pocket 20
  • the equator of the ball and the inner peripheral surface of the pocket can be reliably brought into contact with each other, and the cage is stably rotationally driven.
  • a radial direction force Fr force generated by vibration
  • Fr is divided into a tangential force Fr ⁇ sin ⁇ and a normal force Fr ⁇ cos ⁇ by the curved surface of the ball 13.
  • the pocket clearance ⁇ P between the cage 14 and the ball 13 is The pocket clearance ⁇ P1 in the (circumferential direction of the bearing) differs from the pocket clearance ⁇ P2 in the rotation axis direction (the bearing axial direction).
  • the cage 14 of the present embodiment even if axial fluctuations occur during rotation, it becomes difficult for the axial wall surface of the pocket 20 and the balls 13 to make contact, making it difficult to induce cage noise. There is also an action. If the balls 13 come into contact with each other, the cage sound can be suppressed by the frictional force generated between the balls 13 and the cage 14 as described above.
  • the inner diameter side opening 21 of the pocket 20 that contacts the ball 13 is preferably C-chamfered or R-chamfered in order to prevent wear due to contact with the ball 13.
  • C is 0.1 or more (that is, a point of 0.1 mm or more is connected from the intersection point of the inner peripheral surface of the cage 14 and the axial end surface of the pocket 20 and 45 ° to each side. Crossing), and C0.1 to C1 is more preferable.
  • the cage 14 is stably rotationally driven by satisfying the two expressions, B> PCD / 2 and PCD / 2> A. It is also possible to suppress the generation of cage noise. Further, according to the cage 14 of the present embodiment, since the pair of outer diameter side lip portions 24 are formed on the outer diameter side of the pocket 20, the lubricant flowing to the outer diameter side by centrifugal force is stored in the lubricant reservoir. It can be captured and the lubricity of the pocket 20 and the ball 13 is improved.
  • the cage 14 for ball guide can increase the gap between the outer ring 11 and the cage 14 as compared with the outer ring guide, and can easily supply the lubricant between the balls 13 and the inner surface of the pocket 20, and thus the lubricity can be improved. Further improve.
  • the pair of outer diameter side lip portions 24 of the cage 14a are provided on the outer diameter side of the pocket 20 and on the axial direction side of the cage 14, and are opposed to each other in the axial direction.
  • the lip portion cylindrical surface 26 and the inclined surface 27 forming each outer diameter side lip portion 24 of the present embodiment are arranged symmetrically in the circumferential direction with respect to the circumferential intermediate portion of the inner surface of the pocket 20.
  • the size is set so that it does not exceed the intermediate portion in the axial direction.
  • the outer diameter side lip portion 24 of the present embodiment includes the circumferential intermediate portion of the pocket 20 and is formed along the circumferential direction of the pocket 20.
  • the cage 14a satisfies the conditions of B> PCD / 2 and PCD / 2> A. Further, in the outer diameter side lip portion 24, the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14 a relatively move in the axial direction of the angular ball bearing 10, so that the ball 13 is retained in the pocket 20. It is formed in a size that does not interfere with the balls 13 when coming into contact with the inner diameter side opening 21. As a result, it is possible to prevent the outer diameter side lip portion 24 provided closer to the axial direction of the cage 14a from inhibiting the effect of suppressing self-excited vibration of the cage 14a. Other configurations and operations are similar to those of the first embodiment.
  • the angular ball bearing 10 of the third embodiment is different from that of the first embodiment in that the outer diameter side lip portion 24 of the cage 14b is provided over the entire circumference of the pocket 20 on the outer diameter side. . Therefore, the lip portion cylindrical surface 26 and the inclined surface 27 forming the outer diameter side lip portion 24 are formed over the entire circumference of the pocket 20.
  • the cage 14b satisfies the conditions of B> PCD / 2 and PCD / 2> A.
  • the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14b include a virtual plane PL including the rotation axis of the angular ball bearing 10 and the central axis L1 of the pocket 20.
  • the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14a relatively move in the axial direction of the angular ball bearing 10, so that the ball 13 is retained in the pocket 20. It is formed in a size that does not interfere with the balls 13 when coming into contact with the inner diameter side opening 21. As a result, even when the outer diameter side lip portion 24 formed over the entire circumference of the pocket 20 is provided, the cage 14 is stably driven to rotate and the self-excited vibration of the cage 14b is suppressed. It can be prevented from being hindered. Other configurations and operations are similar to those of the first embodiment.
  • the pocket 20 of the retainer 14c is provided with the cylindrical surface 33 and the inner diameter side lip portion 34 in that of the first embodiment.
  • the pocket 20 includes a cylindrical surface 33 whose center axis L1 extends in the radial direction, and an inner diameter side lip portion 34 provided on the inner diameter side of the pocket 20 and on the circumferential direction side of the cage 14c.
  • the cage 14c is a ball guide type cage in which the inner diameter side lip portion 34 contacts the ball 13 and is guided by the ball 13 when the cage 14c moves in the radial direction.
  • the inner diameter side lip portion 34 is continuous on the outer diameter side with the lip portion cylindrical surface 36 provided on the outer diameter side from the inner diameter side opening 21 of the pocket 20, and is continuous with the lip portion cylindrical surface 36 and the cylindrical surface 36. And a slanted surface 37 connecting 33.
  • the lip portion cylindrical surface 36 is a partial cylindrical surface concentric with the cylindrical surface 33, and has a smaller diameter than the cylindrical surface 33.
  • the inclined surface 37 prevents edge contact when the ball 13 and the cage 14 relatively move in the radial direction and the ball 13 and the inner diameter side lip portion 34 come into contact with each other.
  • a boundary line 38 between the cylindrical surface 33 and the inner diameter side lip portion 34 extends along the circumferential direction of the pocket 20.
  • the inner diameter side lip portion 34 provided nearer to the circumferential direction of the cage 14c is arranged on the inner diameter side of the pocket 20 so as to be symmetrical with respect to the axially intermediate portion of the inner surface of the pocket 20 in the circumferential direction.
  • the size is set so that it does not exceed the middle portion in the circumferential direction.
  • the inner diameter side lip portion 34 of the present embodiment includes the axially intermediate portion of the pocket 20 and is provided along the circumferential direction within a phase range of less than ⁇ 45 ° with respect to the axially intermediate portion of the pocket 20. Has been.
  • 1/2 of the cage inner diameter in the inner diameter side opening 21 is B
  • the pitch circle diameter of the balls 13 is PCD
  • the pocket 20 in the direction along the central axis L1 of the pocket 20.
  • the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14c include a virtual plane PL including the central axis L1 of the pocket 20 and the rotation axis X of the angular ball bearing 10. It is formed in such a size that it does not interfere with the ball 13 when the equator portion 13a of the ball 13 comes into contact with the cylindrical surface 33 while moving relative to the vertical direction.
  • the ball 13 rotationally drives the cage 14 via the inner surface of the pocket 20
  • the equator 13a of the ball 13 and the inner surface of the pocket 20 can be surely brought into contact with each other, and the cage 14c rotates stably. Driven.
  • the cage 14 is stably rotationally driven by satisfying the two expressions, B> PCD / 2 and PCD / 2> C. It is also possible to suppress the generation of cage noise. Further, according to the cage 14 of the present embodiment, since the ball guide is performed by the inner diameter side lip portion 34 serving as the ball locking portion, the gap between the outer ring 11 and the cage 14 is larger than that of the outer ring guide. As a result, the lubricant can be easily supplied between the balls 13 and the inner surface of the pocket 20, and the lubricity is improved. Other configurations and operations are similar to those of the first embodiment.
  • the present invention is not limited to the above-described embodiments, and can be modified, improved, and the like as appropriate.
  • the outer diameter side lip portion and the inner diameter side lip portion may be formed separately in the circumferential direction.
  • An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a rollable arrangement having a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface.
  • An angular contact ball bearing comprising: a plurality of balls and a cage of a ball guide type having a pocket for rotatably holding the plurality of balls;
  • the retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction,
  • the cage inner diameter is equal over the entire circumference of the pocket,
  • the pocket includes a cylindrical surface and an outer diameter side lip portion provided on the outer diameter side of the pocket, 1/2 of the cage inner diameter in the inner diameter side opening is B, the pitch circle diameter of the ball is PCD, the diameter of the inner diameter side opening of the pocket is Dp,
  • a Angular contact ball bearing characterized by satisfying.
  • the contact position between the ball and the cage in the circumferential direction is the equatorial part of the ball and the inner surface of the pocket, and in the axial direction, the surface on the outer diameter side of the equatorial part of the ball and the inner diameter of the pocket.
  • the position of contact with the side opening can be provided.
  • the cage can be stably driven to rotate, and generation of cage noise due to self-excited vibration of the cage can be suppressed.
  • the lubricant reservoir is formed between the balls and the inner peripheral surface of the pocket by the outer diameter side lip portion that becomes the ball locking portion when guiding the balls, and the outer diameter side is formed by the centrifugal force.
  • the lubricant flowing in the can be caught in the lubricant reservoir, and the lubricity is improved.
  • the cage of the ball guide can make the gap between the outer ring and the cage larger than that of the outer ring guide, so that the lubricant can be easily supplied between the balls and the inner peripheral surface of the pocket, and the lubricity is further improved. .
  • a boundary line between the cylindrical surface and the outer diameter side lip portion extends along the circumferential direction of the pocket,
  • the outer diameter side lip portion is provided on the inner diameter side from the outer diameter side opening portion of the pocket, is concentric with the cylindrical surface, and has a smaller diameter lip portion cylindrical surface than the cylindrical surface, the cylindrical surface and the outer diameter.
  • the angular contact ball bearing according to (1) characterized in that the angular ball bearing comprises a boundary line with the side lip portion and an inclined surface connecting the cylindrical surface of the lip portion.
  • the outer diameter side lip portion forms a lubricant reservoir between the ball and the inner peripheral surface of the pocket, and it is possible to prevent edge contact between the ball and the outer diameter side lip portion.
  • the outer diameter side lip portion has a pair of outer diameter side lip portions that are provided on the outer diameter side of the pocket and near the circumferential direction of the cage and that face each other in the circumferential direction.
  • the outer diameter side lip portion has a pair of outer diameter side lip portions that are provided on the outer diameter side of the pocket and closer to the axial direction of the cage and that face each other in the axial direction.
  • the ball In the outer diameter side lip portion, the ball, the center of which is located on the pitch circle of the ball, and the retainer relatively move in the axial direction of the angular ball bearing, and the ball is in the pocket.
  • An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a rollable arrangement with a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface.
  • An angular contact ball bearing comprising: a plurality of balls and a cage of a ball guide type having a pocket for rotatably holding the plurality of balls;
  • the retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction, At the inner diameter side opening of the pocket, the cage inner diameter is equal over the entire circumference of the pocket,
  • the pocket includes a cylindrical surface, a pair of inner diameter side lip portions that are provided on the inner diameter side of the pocket, and that are provided closer to the circumferential direction of the cage, and that face each other in the circumferential direction.
  • the cage can be stably driven to rotate, and generation of cage noise due to self-excited vibration of the cage can be suppressed.
  • the cage of the present embodiment is ball guided by the inner diameter side lip that serves as a ball locking portion, the gap between the outer ring and the cage can be made larger than that of the outer ring guide, and the lubricant can be used as a ball. And the inner peripheral surface of the pocket are easily supplied, and the lubricity is improved.
  • a boundary line between the cylindrical surface and the inner diameter side lip portion extends along the circumferential direction of the pocket,
  • the inner diameter side lip portion is provided on the outer diameter side from the inner diameter side opening of the pocket, is concentric with the cylindrical surface, and has a lip portion cylindrical surface having a smaller diameter than the cylindrical surface, the boundary line and the lip portion cylinder.
  • An angular contact ball bearing according to (8) characterized in that the angular contact ball bearing is configured by an inclined surface connecting the surface. According to this configuration, it is possible to prevent edge contact between the ball and the inner diameter side lip portion.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A cage (14) includes: a pair of ring parts (15, 16); and a plurality of pillar parts (17) that couple the pair of ring parts (15, 16) in the axial direction and that are disposed at predetermined intervals in the circumferential direction. An inner-diameter-side opening section (21) of a pocket (20) has a cage inner diameter that is equal over the entire circumference of the pocket (20) and satisfies B>PCD/2 and PCD/2>A, where B indicates 1/2 of the cage inner diameter in the inner-diameter-side opening section (21), PCD indicates a pitch circle diameter of balls (13), Dp indicates the diameter of the inner-diameter-side opening section (21) of the pocket (20), A=Bcosθ, and θ=sin-1{(Dp/2)/B}. Accordingly, an angular ball bearing including a ball-guide-type cage that is capable of suppressing cage sound is provided.

Description

アンギュラ玉軸受Angular contact ball bearing
　本発明は、アンギュラ玉軸受に関し、より詳細には、工作機械の主軸装置やモータに適用可能な、玉案内方式の保持器を備えるアンギュラ玉軸受に関する。 The present invention relates to an angular contact ball bearing, and more particularly, to an angular contact ball bearing equipped with a ball guide type cage, which is applicable to a spindle device of a machine tool or a motor.
　工作機械の主軸においては、アンギュラ玉軸受が広く使用されている。アンギュラ玉軸受に使用される保持器としては、外輪案内方式のもの、内輪案内方式のもの、玉案内方式のものが知られている。このうち、玉案内方式は、軌道輪と保持器との間の隙間を大きくでき、潤滑剤を玉とポケットの内面との間に供給しやすいことから、比較的潤滑性が良好である（例えば、特許文献１参照）。 Angular contact ball bearings are widely used in machine tool spindles. As cages used for angular ball bearings, outer ring guide type, inner ring guide type, and ball guide type are known. Among them, the ball guide system has a relatively good lubricity because the gap between the bearing ring and the cage can be increased and the lubricant can be easily supplied between the ball and the inner surface of the pocket (for example, , Patent Document 1).
日本国特開２００９－２７５７２２号公報Japanese Patent Laid-Open No. 2009-275722
　ここで、玉案内方式の保持器を組み込んだアンギュラ玉軸受においては、玉が転動する内輪軌道面と外輪軌道面の形状誤差、玉自身の形状誤差、あるいは、軸受の内輪と外輪との中心軸の芯ずれや傾き等によって、玉は、玉ごとに微小の遅れや進みが発生し、保持器ポケットの内面と接触する。 Here, in an angular contact ball bearing that incorporates a ball guide type cage, the shape error of the inner ring raceway surface and the outer ring raceway surface on which the ball rolls, the shape error of the ball itself, or the center of the inner ring and outer ring of the bearing Due to misalignment or inclination of the shaft, the balls are slightly delayed or advanced for each ball and come into contact with the inner surface of the cage pocket.
　図４（ｂ）は、玉案内方式の所謂、もみ抜き型保持器のポケット内面が玉と接触したときの模式図を示す。この場合、玉１３の赤道部１３ａが保持器１４のポケット内面と接触すると、保持器１４には、摩擦力Ｆｒが発生する。
　このため、摩擦力Ｆｒの方向である径方向に保持器が自励振動し、保持器音と呼ばれる騒音が発生することがある。 FIG. 4 (b) shows a schematic view of the so-called ball guide type cage of the ball guide type when the inner surface of the pocket contacts the balls. In this case, when the equatorial part 13 a of the ball 13 comes into contact with the inner surface of the pocket of the cage 14, a frictional force Fr is generated in the cage 14.
For this reason, the cage may vibrate in the radial direction, which is the direction of the frictional force Fr, to generate noise called cage noise.
　本発明は、前述した課題に鑑みてなされたものであり、その目的は、保持器音を抑制することができる、玉案内方式の保持器を備えるアンギュラ玉軸受を提供することにある。 The present invention has been made in view of the problems described above, and an object thereof is to provide an angular ball bearing including a ball guide type cage capable of suppressing cage noise.
　本発明の上記目的は、下記の構成により達成される。
（１）　内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、前記外輪軌道面及び前記内輪軌道面間に所定の接触角を持って転動自在に配置される複数の玉と、前記複数の玉を転動自在に保持するポケットを有する玉案内方式の保持器と、を備えるアンギュラ玉軸受であって、
　前記保持器は、一対の円環部と、該一対の円環部を軸方向に連結し、円周方向に所定の間隔で配置された複数の柱部と、を備え、
　前記ポケットの内径側開口部では、前記ポケットの全周に亘って保持器内径が等しく、
　前記ポケットは、円筒面と、前記ポケットの外径側に設けられた外径側リップ部と、を備え、
　前記内径側開口部における保持器内径の１／２をＢ、前記玉のピッチ円直径をＰＣＤ、
前記ポケットの内径側開口部の直径をＤｐ、Ａ＝Ｂｃｏｓθ、θ＝ｓｉｎ－１｛（Ｄｐ／２）／Ｂ｝としたとき、
　Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ａ
を満足することを特徴とするアンギュラ玉軸受。
（２）　内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、前記外輪軌道面及び前記内輪軌道面間に所定の接触角を持って転動自在に配置される複数の玉と、前記複数の玉を転動自在に保持するポケットを有する玉案内方式の保持器と、を備えるアンギュラ玉軸受であって、
　前記保持器は、一対の円環部と、該一対の円環部を軸方向に連結し、円周方向に所定の間隔で配置された複数の柱部と、を備え、
　前記ポケットの内径側開口部では、前記ポケットの全周に亘って保持器内径が等しく、
　前記ポケットは、円筒面と、前記ポケットの内径側、且つ前記保持器の円周方向寄りに設けられた内径側リップ部と、を備え、
　前記内径側開口部における保持器内径の１／２をＢ、前記玉のピッチ円直径をＰＣＤ、
前記ポケットの中心軸線に沿った方向における、前記アンギュラ玉軸受の回転軸から前記円筒面と前記内径側リップ部との境界線までの高さをＣとしたとき、
　Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ｃ
を満足することを特徴とするアンギュラ玉軸受。 The above object of the present invention is achieved by the following configurations.
(1) An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a rollable arrangement having a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface. An angular contact ball bearing comprising: a plurality of balls and a cage of a ball guide type having a pocket for rotatably holding the plurality of balls;
The retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction,
At the inner diameter side opening of the pocket, the cage inner diameter is equal over the entire circumference of the pocket,
The pocket includes a cylindrical surface and an outer diameter side lip portion provided on the outer diameter side of the pocket,
1/2 of the cage inner diameter in the inner diameter side opening is B, the pitch circle diameter of the balls is PCD,
When the diameter of the opening on the inner diameter side of the pocket is Dp, A = Bcos θ, θ = sin −1 {(Dp / 2) / B},
B> PCD / 2 and PCD / 2> A
Angular contact ball bearing characterized by satisfying.
(2) An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a rollable arrangement having a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface. An angular contact ball bearing comprising: a plurality of balls and a cage of a ball guide type having a pocket for rotatably holding the plurality of balls;
The retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction,
At the inner diameter side opening of the pocket, the cage inner diameter is equal over the entire circumference of the pocket,
The pocket includes a cylindrical surface and an inner diameter side lip portion provided on the inner diameter side of the pocket and on the circumferential side of the cage.
1/2 of the cage inner diameter in the inner diameter side opening is B, the pitch circle diameter of the balls is PCD,
When the height from the rotation axis of the angular ball bearing to the boundary line between the cylindrical surface and the inner diameter side lip portion in the direction along the central axis of the pocket is C,
B> PCD / 2 and PCD / 2> C
Angular contact ball bearing characterized by satisfying.
　本発明のアンギュラ玉軸受によれば、玉案内方式の保持器が安定して回転駆動されると共に、該保持器から生じる保持器音を抑制することができる。 According to the angular ball bearing of the present invention, the ball guide type cage can be stably driven to rotate, and the cage noise generated from the cage can be suppressed.
本発明の第１実施形態に係るアンギュラ玉軸受の要部断面図である。It is a principal part sectional view of the angular contact ball bearing which concerns on 1st Embodiment of this invention. 図１に示す保持器のポケット形状を示す部分拡大斜視図である。It is a partially expanded perspective view which shows the pocket shape of the holder shown in FIG. 図１のＩＩＩ－ＩＩＩ線に沿った断面における保持器と玉の各部寸法関係を示す断面図である。FIG. 3 is a cross-sectional view showing a dimensional relationship between a cage and balls in a cross section taken along line III-III of FIG. 1. （ａ）は、本実施形態の保持器において、ラジアル方向振動により玉と保持器の接触部に働く力を示す、図１相当の断面図であり、（ｂ）は、従来の保持器において、ラジアル方向振動により玉と保持器の接触部に働く力を示す、図１相当の断面図である。FIG. 1A is a cross-sectional view corresponding to FIG. 1 showing a force acting on a contact portion between a ball and a cage due to radial direction vibration in the cage of the present embodiment, and FIG. It is sectional drawing equivalent to FIG. 1 which shows the force which acts on the contact part of a ball and a cage by radial direction vibration. 本発明の第２実施形態に係るアンギュラ玉軸受の要部断面図である。It is a principal part sectional drawing of the angular contact ball bearing which concerns on 2nd Embodiment of this invention. （ａ）は、図５に示す保持器のポケット形状を示す部分拡大斜視図、（ｂ）は、（ａ）のＶＩ矢視図である。(A) is a partially enlarged perspective view showing the pocket shape of the cage shown in FIG. 5, and (b) is a VI arrow view of (a). 図５のＶＩＩ－ＶＩＩ線に沿った断面図である。FIG. 7 is a sectional view taken along line VII-VII of FIG. 5. 本発明の第３実施形態に係るアンギュラ玉軸受の要部断面図である。It is a principal part sectional drawing of the angular contact ball bearing which concerns on 3rd Embodiment of this invention. 図８に示す保持器のポケット形状を示す部分拡大斜視図である。FIG. 9 is a partially enlarged perspective view showing a pocket shape of the cage shown in FIG. 8. 本発明の第４実施形態に係るアンギュラ玉軸受の要部断面図である。It is a principal part sectional drawing of the angular contact ball bearing which concerns on 4th Embodiment of this invention. （ａ）は、図１０に示す保持器のポケット形状を示す部分拡大斜視図、（ｂ）は、（ａ）のＸＩ矢視図である。FIG. 11A is a partially enlarged perspective view showing the pocket shape of the cage shown in FIG. 10, and FIG. 11B is a XI arrow view of FIG. 図１０のＸＩＩ－ＸＩＩ線に沿った断面における保持器と玉の各部寸法関係を示す断面図である。FIG. 11 is a cross-sectional view showing the dimensional relationship between the cage and the balls in the cross section taken along the line XII-XII in FIG. 10.
　以下、本発明の各実施形態に係るアンギュラ玉軸受を図面に基づいて詳細に説明する。 The angular ball bearing according to each embodiment of the present invention will be described below in detail with reference to the drawings.
（第１実施形態）
　図１に示すように、第１実施形態のアンギュラ玉軸受１０は、内周面に外輪軌道面１１ａを有する外輪１１と、外周面に内輪軌道面１２ａを有する内輪１２と、外輪軌道面１１ａ及び内輪軌道面１２ａ間に所定の接触角αを持って転動自在に配置される複数の玉１３と、複数の玉１３を転動自在に保持する保持器１４と、を備える。 (First embodiment)
As shown in FIG. 1, an angular contact ball bearing 10 of the first embodiment has an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, an outer ring raceway surface 11a and an outer ring raceway surface 11a. It is provided with a plurality of balls 13 rotatably arranged between the inner ring raceway surfaces 12a with a predetermined contact angle α, and a retainer 14 rotatably holding the plurality of balls 13.
　外輪１１には、外輪軌道面１１ａに対して軸方向一方側（軸受正面側）にカウンタボア１１ｂが形成される。また、内輪１２には、内輪軌道面１２ａに対して軸方向他方側（軸方向背面側）にカウンタボア１２ｂが形成されている。 A counterbore 11b is formed in the outer ring 11 on one axial side (bearing front side) with respect to the outer ring raceway surface 11a. Further, the inner ring 12 is formed with a counter bore 12b on the other side in the axial direction (axial rear side) with respect to the inner ring raceway surface 12a.
　図２に示すように、保持器１４は、一対の円環部１５、１６と、該一対の円環部１５、１６を軸方向に連結し、円周方向に所定の間隔で配置された複数の柱部１７と、を備える。そして、一対の円環部１５、１６、及び隣り合う柱部１７との間には、玉１３を回転自在に保持するポケット２０がそれぞれ形成される。 As shown in FIG. 2, the cage 14 includes a pair of annular portions 15 and 16 and a plurality of annular portions 15 and 16 which are axially connected to each other and are arranged at predetermined intervals in the circumferential direction. And a pillar portion 17 of. A pocket 20 for rotatably holding the ball 13 is formed between the pair of annular portions 15 and 16 and the adjacent column portion 17.
　また、本実施形態では、一対の円環部１５、１６、及び複数の柱部１７を含む保持器１４の全体に亘って、保持器１４の内周面が等しい内径を有すると共に、外周面も保持器１４の全体に亘って等しい外径を有する。このため、各ポケット２０の内径側開口部２１では、ポケット２０の全周に亘って保持器内径が等しくなっている。 In the present embodiment, the inner peripheral surface of the retainer 14 has the same inner diameter over the entire retainer 14 including the pair of annular portions 15 and 16 and the plurality of column portions 17, and the outer peripheral surface also has the same inner diameter. The cage 14 has the same outer diameter throughout the cage 14. Therefore, the inner diameter side opening 21 of each pocket 20 has the same cage inner diameter over the entire circumference of the pocket 20.
　ポケット２０は、その中心軸線Ｌ１（図３参照）が径方向に延びる円筒面２３と、ポケット２０の外径側、且つ保持器１４の円周方向寄りに設けられ、互いに円周方向に対向する一対の外径側リップ部２４と、を備える。保持器１４は、径方向に移動した際に、外径側リップ部２４が玉１３に接触し、玉１３によって案内される玉案内方式の保持器である。 The pocket 20 is provided on the cylindrical surface 23 whose center axis L1 (see FIG. 3) extends in the radial direction, on the outer diameter side of the pocket 20 and on the circumferential side of the cage 14, and faces each other in the circumferential direction. And a pair of outer diameter side lip portions 24. The cage 14 is a ball guide type cage in which the outer diameter side lip portion 24 contacts the ball 13 and is guided by the ball 13 when the cage 14 moves in the radial direction.
　各外径側リップ部２４は、ポケット２０の外径側開口部２５から内径側に設けられるリップ部円筒面２６と、リップ部円筒面２６と内径側で連続し、リップ部円筒面２６と円筒面２３とを接続する傾斜面２７と、で構成されている。リップ部円筒面２６は、円筒面２３と同心の部分円筒面であり、円筒面２３より小径となっている。傾斜面２７は、玉１３と保持器１４とが径方向に相対移動して玉１３と外径側リップ部２４とが接触した際のエッジ当たりを防止する。円筒面２３と外径側リップ部２４との境界線２８は、ポケット２０の円周方向に沿って延びている。 Each outer diameter side lip portion 24 is continuous with the lip portion cylindrical surface 26 provided on the inner diameter side from the outer diameter side opening portion 25 of the pocket 20 on the inner diameter side with the lip portion cylindrical surface 26, and the lip portion cylindrical surface 26 and the cylinder. And an inclined surface 27 that connects the surface 23. The lip portion cylindrical surface 26 is a partial cylindrical surface concentric with the cylindrical surface 23 and has a smaller diameter than the cylindrical surface 23. The inclined surface 27 prevents edge contact when the ball 13 and the cage 14 relatively move in the radial direction and the ball 13 and the outer diameter side lip portion 24 come into contact with each other. A boundary line 28 between the cylindrical surface 23 and the outer diameter side lip portion 24 extends along the circumferential direction of the pocket 20.
　また、保持器１４の円周方向寄りに設けられる各外径側リップ部２４は、ポケット２０の外径側において、ポケット２０の内面の軸方向中間部に対して円周方向に対称に、該内面の円周方向中間部を越えない大きさに設定されている。例えば、本実施形態の外径側リップ部２４は、ポケット２０の内面の軸方向中間部を含み、ポケット２０の内面の軸方向中間部に対して、±４５°未満の位相範囲内に円周方向に沿って設けられている。 Further, the outer diameter side lip portions 24 provided near the circumferential direction of the cage 14 are arranged symmetrically in the circumferential direction on the outer diameter side of the pocket 20 with respect to the axially intermediate portion of the inner surface of the pocket 20. The size is set so that it does not exceed the middle portion in the circumferential direction of the inner surface. For example, the outer diameter side lip portion 24 of the present embodiment includes the axially intermediate portion of the inner surface of the pocket 20, and has a circumference within a phase range of less than ± 45 ° with respect to the axially intermediate portion of the inner surface of the pocket 20. It is provided along the direction.
　なお、保持器１４は、合成樹脂製や金属製などのいずれで形成されてもよい。また、保持器１４の加工方法は、切削加工、射出成型のいずれであってもよい。例えば、合成樹脂製の保持器１４としては、基材入りのフェノール樹脂であってもよい。この場合、基材としては、積層板では紙、木綿布、アスベスト布、ガラス繊維布、ナイロン織物、成型品では、木粉、木綿、パルプ、アスベスト、雲母、ガラス繊維などが用いられる。また、保持器１４は、ポリアミド、ポリアセタール、ポリエーテルエーテルケトン、ポリイミド、ポリフェニレンサルファイドなどの樹脂でもよく、必要に応じて、該樹脂に、ガラス繊維、カーボン繊維、アラミド繊維などの強化材を添加してもよい。さらに、保持器１４は、銅合金や銀めっきなどを施した鉄製であってもよい。 Note that the cage 14 may be made of synthetic resin, metal, or the like. Further, the processing method of the cage 14 may be either cutting processing or injection molding. For example, the cage 14 made of synthetic resin may be a phenol resin containing a base material. In this case, as the base material, paper, cotton cloth, asbestos cloth, glass fiber cloth, nylon fabric is used for the laminated board, and wood powder, cotton, pulp, asbestos, mica, glass fiber and the like are used for the molded product. The cage 14 may be a resin such as polyamide, polyacetal, polyetheretherketone, polyimide, or polyphenylene sulfide. If necessary, a reinforcing material such as glass fiber, carbon fiber or aramid fiber may be added to the resin. May be. Further, the cage 14 may be made of iron plated with copper alloy or silver.
　また、本実施形態では、図３に示すように、内径側開口部２１における保持器内径の１／２をＢ、玉１３のピッチ円直径をＰＣＤ、ポケット２０の内径側開口部２１の直径（以下、「ポケット径」とも称す）をＤｐ、Ａ＝Ｂｃｏｓθ、θ＝ｓｉｎ－１｛（Ｄｐ／２）／Ｂ｝としたとき、以下の式を満足するように設計されている。
　Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ａ
　なお、θは、アンギュラ玉軸受１０の回転軸Ｘと玉１３の中心Ｏを結ぶ最短線（ポケット２０の中心軸線）Ｌ１と、アンギュラ玉軸受１０の回転軸Ｘとポケット２０の内径側開口部２１の円周方向最遠部Ｒを結ぶ直線Ｌ２とのなす角度である。 Further, in the present embodiment, as shown in FIG. 3, 1/2 of the cage inner diameter in the inner diameter side opening 21 is B, the pitch circle diameter of the balls 13 is PCD, and the diameter of the inner diameter side opening 21 of the pocket 20 ( In the following description, the "pocket diameter" will be referred to as Dp, A = Bcos θ, and θ = sin −1 {(Dp / 2) / B}.
B> PCD / 2 and PCD / 2> A
Note that θ is the shortest line (center axis line of the pocket 20) L1 connecting the rotation axis X of the angular ball bearing 10 and the center O of the ball 13, the rotation axis X of the angular ball bearing 10 and the inner diameter side opening 21 of the pocket 20. Is an angle formed by a straight line L2 connecting the farthest portions R in the circumferential direction.
　ＰＣＤ／２＞Ａの条件を満足することで、アンギュラ玉軸受１０の運転中に玉１３がポケット２０の内面を介して、保持器１４を回転駆動させる際、図３に示すように、回転方向（軸受の円周方向）における玉１３と保持器１４の接触位置は、玉１３の赤道部１３ａと、保持器１４のポケット２０の円筒面２３となり、保持器１４が安定して回転駆動される。なお、玉１３の赤道部１３ａとは、アンギュラ玉軸受１０の回転軸Ｘと玉１３の中心Ｏを結ぶ最短線Ｌ１に直角な面が、玉径を表す位置で、玉１３の表面を通過する線である。 By satisfying the condition of PCD / 2> A, when the balls 13 rotationally drive the cage 14 via the inner surface of the pocket 20 during the operation of the angular ball bearing 10, as shown in FIG. The contact position between the ball 13 and the cage 14 in the (circumferential direction of the bearing) is the equator 13a of the ball 13 and the cylindrical surface 23 of the pocket 20 of the cage 14, and the cage 14 is stably driven to rotate. . In addition, the equatorial portion 13a of the ball 13 is such that a surface perpendicular to the shortest line L1 connecting the rotation axis X of the angular ball bearing 10 and the center O of the ball 13 passes the surface of the ball 13 at a position representing the ball diameter. It is a line.
　ただし、外径側リップ部２４は、玉１３のピッチ円上に中心Ｏが位置する玉１３と保持器１４とが、ポケット２０の中心軸線Ｌ１とアンギュラ玉軸受１０の回転軸Ｘを含む仮想平面ＰＬに対して垂直方向に相対移動して、玉１３が円筒面２３と接触した際、玉１３と干渉しない大きさに形成される。これにより、玉１３がポケット２０の内面を介して保持器１４を回転駆動させる際、確実に玉の赤道部とポケットの内周面を接触させることができ、保持器が安定して回転駆動される。 However, in the outer diameter side lip portion 24, the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14 is a virtual plane including the central axis L1 of the pocket 20 and the rotation axis X of the angular ball bearing 10. It is formed in such a size that it does not interfere with the ball 13 when the ball 13 comes into contact with the cylindrical surface 23 by moving relative to the vertical direction relative to PL. As a result, when the ball 13 rotationally drives the cage 14 via the inner surface of the pocket 20, the equator of the ball and the inner peripheral surface of the pocket can be reliably brought into contact with each other, and the cage is stably rotationally driven. It
　一方、Ｂ＞ＰＣＤ／２の条件を満足することで、保持器１４が回転中に軸方向に移動した際、図１に示すように、保持器１４と玉１３が接触する位置は、玉１３の赤道部１３ａではなく、赤道部１３ａより外径側の表面と、保持器１４のポケット２０の内径側開口部２１との接触となる。 On the other hand, by satisfying the condition of B> PCD / 2, when the cage 14 moves axially during rotation, as shown in FIG. Not the equatorial part 13a, but the surface on the outer diameter side of the equatorial part 13a and the inner diameter side opening 21 of the pocket 20 of the cage 14.
　ここで、図４（ｂ）に示すように、従来のアンギュラ玉軸受では、保持器１４と玉１３との間の潤滑が十分でなくなり、両者間での滑り摩擦が大きくなると、径方向に激しく自励振動し、保持器１４の振動エネルギーが過大になることで、所謂、保持器音が発生する。 Here, as shown in FIG. 4 (b), in the conventional angular ball bearing, when the lubrication between the cage 14 and the balls 13 becomes insufficient and the sliding friction between the two becomes large, the radial friction becomes severe. The self-excited vibration causes the vibration energy of the cage 14 to become excessive, so that a so-called cage sound is generated.
　一方、本実施形態のアンギュラ玉軸受１０では、図４（ａ）に示すように、保持器１４が径方向に自励振動する、所謂保持器音が発生した際に、ポケット２０の内径側開口部２１と玉１３が接触することにより、保持器１４の径方向の動きを規制することができる。 On the other hand, in the angular ball bearing 10 of the present embodiment, as shown in FIG. 4A, when the cage 14 self-oscillates in the radial direction, that is, when a so-called cage sound is generated, the inside opening of the pocket 20 is opened. By contacting the portion 21 and the ball 13, the radial movement of the cage 14 can be restricted.
　即ち、自励振動が発生し保持器１４が径方向に動く場合に、保持器１４と玉１３の接触点Ｐにはラジアル方向の力Ｆｒ（振動により発生する力）が働く。Ｆｒは玉１３の曲面によって接線力Ｆｒ×ｓｉｎβと法線力Ｆｒ×ｃｏｓβの分力に分けられる。Ｆｒ×ｃｏｓβの大きさは垂直抗力Ｎに等しく、玉１３とポケット２０との摩擦係数をμとすると、接触点ＰにはμＮ（＝μＦｒ×ｃｏｓβ）の摩擦力が発生する。 That is, when self-excited vibration occurs and the cage 14 moves in the radial direction, a radial direction force Fr (force generated by vibration) acts on the contact point P between the cage 14 and the ball 13. Fr is divided into a tangential force Fr × sin β and a normal force Fr × cos β by the curved surface of the ball 13. The magnitude of Fr × cos β is equal to the normal force N, and when the friction coefficient between the ball 13 and the pocket 20 is μ, a frictional force of μN (= μFr × cos β) is generated at the contact point P.
　この摩擦力により、保持器１４の径方向の振動は減衰され、自励振動が抑制されて保持器音が抑制される効果が得られる。一方、ポケット２０の軸方向端部における内径が玉１３のＰＣＤよりも小さい従来のアンギュラ玉軸受では、図４（ｂ）に示すように、ラジアル方向の力Ｆｒからは摩擦力が発生することはない。 By this frictional force, radial vibration of the cage 14 is damped, self-excited vibration is suppressed, and cage sound is suppressed. On the other hand, in the conventional angular ball bearing in which the inner diameter at the axial end of the pocket 20 is smaller than the PCD of the ball 13, as shown in FIG. 4B, the frictional force is not generated from the radial force Fr. Absent.
　また、ＰＣＤ／２＞Ａの条件を満足しつつ、Ｂ＞ＰＣＤ／２の条件を満足する場合、図１及び図３に示すように、保持器１４と玉１３のポケットすきまΔＰは、回転方向（軸受の円周方向）におけるポケットすきまΔＰ１と、回転軸方向（軸受の軸方向）におけるポケットすきまΔＰ２とで異なる。 When the condition of PCD / 2> A is satisfied and the condition of B> PCD / 2 is satisfied, as shown in FIGS. 1 and 3, the pocket clearance ΔP between the cage 14 and the ball 13 is The pocket clearance ΔP1 in the (circumferential direction of the bearing) differs from the pocket clearance ΔP2 in the rotation axis direction (the bearing axial direction).
　具体的に、回転方向（軸受の円周方向）におけるポケットすきまΔＰ１は、ポケット径Ｄｐと、玉１３の赤道部１３ａの直径Ｄｗ１とから、ΔＰ１＝Ｄｐ－Ｄｗ１となる。一方、回転軸方向（軸受の軸方向）におけるポケットすきまΔＰ２は、ポケット２０の内径側開口部２１と軸方向で対向する位置での玉１３の径Ｄｗ２から、ΔＰ２＝Ｄｐ－Ｄｗ２となる。
　ここで、Ｄｗ２は、Ｄｗ１よりも小径となるため、ΔＰ２＞ΔＰ１となる。 Specifically, the pocket clearance ΔP1 in the rotation direction (circumferential direction of the bearing) is ΔP1 = Dp−Dw1 from the pocket diameter Dp and the diameter Dw1 of the equator 13a of the ball 13. On the other hand, the pocket clearance ΔP2 in the rotation axis direction (the axial direction of the bearing) is ΔP2 = Dp−Dw2 from the diameter Dw2 of the ball 13 at the position axially facing the inner diameter side opening 21 of the pocket 20.
Since Dw2 has a smaller diameter than Dw1, ΔP2> ΔP1.
　これにより、本実施形態の保持器１４は、回転中に軸方向の振らつきが万一生じても、ポケット２０の軸方向壁面と玉１３が接触しづらくなり、保持器音を誘発しにくくする作用もある。そして、万一、玉１３が接触した場合には、上記したように、玉１３及び保持器１４間に発生する摩擦力により保持器音を抑制できる。 As a result, in the cage 14 of the present embodiment, even if axial fluctuations occur during rotation, it becomes difficult for the axial wall surface of the pocket 20 and the balls 13 to make contact, making it difficult to induce cage noise. There is also an action. If the balls 13 come into contact with each other, the cage sound can be suppressed by the frictional force generated between the balls 13 and the cage 14 as described above.
　なお、玉１３と接触するポケット２０の内径側開口部２１は、玉１３との接触による摩耗防止を図るため、Ｃ面取り又はＲ面取りとすることが望ましい。Ｃ面取りの場合には、Ｃ０．１以上（即ち、保持器１４の内周面とポケット２０の軸方向端面との交点から０．１ｍｍ以上の点を結んで、各辺に対して４５°で交差）であればよく、Ｃ０．１～Ｃ１であることがより望ましい。Ｒ面取りの場合には、Ｒ０．１（即ち、保持器１４の内周面とポケット２０の軸方向端面との交点から０．１ｍｍ以上の点を結んだ４分円）以上であればよく、Ｒ＝０．１～Ｒ１であることがより望ましい。 Note that the inner diameter side opening 21 of the pocket 20 that contacts the ball 13 is preferably C-chamfered or R-chamfered in order to prevent wear due to contact with the ball 13. In the case of C chamfering, C is 0.1 or more (that is, a point of 0.1 mm or more is connected from the intersection point of the inner peripheral surface of the cage 14 and the axial end surface of the pocket 20 and 45 ° to each side. Crossing), and C0.1 to C1 is more preferable. In the case of R chamfering, it may be R0.1 (that is, a quadrant connecting a point of 0.1 mm or more from the intersection of the inner peripheral surface of the cage 14 and the axial end surface of the pocket 20) or more, More preferably, R = 0.1 to R1.
　以上説明したように、本実施形態のアンギュラ玉軸受１０によれば、２つの式、Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ａを満足することで、保持器１４が安定して回転駆動されると共に、保持器音の発生を抑制することができる。また、本実施形態の保持器１４によれば、ポケット２０の外径側に一対の外径側リップ部２４が形成されているので、遠心力で外径側に流れる潤滑剤を潤滑剤溜りで捉えることができ、ポケット２０と玉１３の潤滑性が向上する。また、玉案内の保持器１４は、外輪案内と比べて外輪１１と保持器１４との間の隙間を大きくでき、潤滑剤を玉１３とポケット２０の内面の間に供給しやすく、潤滑性がさらに向上する。 As described above, according to the angular ball bearing 10 of the present embodiment, the cage 14 is stably rotationally driven by satisfying the two expressions, B> PCD / 2 and PCD / 2> A. It is also possible to suppress the generation of cage noise. Further, according to the cage 14 of the present embodiment, since the pair of outer diameter side lip portions 24 are formed on the outer diameter side of the pocket 20, the lubricant flowing to the outer diameter side by centrifugal force is stored in the lubricant reservoir. It can be captured and the lubricity of the pocket 20 and the ball 13 is improved. Further, the cage 14 for ball guide can increase the gap between the outer ring 11 and the cage 14 as compared with the outer ring guide, and can easily supply the lubricant between the balls 13 and the inner surface of the pocket 20, and thus the lubricity can be improved. Further improve.
（第２実施形態）
　次に、第２実施形態に係るアンギュラ玉軸受について、図５～図７を参照して説明する。なお、第１実施形態と同等部分については、同一又は相当符号を付して、説明を省略又は簡略化する。 (Second embodiment)
Next, an angular contact ball bearing according to the second embodiment will be described with reference to FIGS. The same parts as those in the first embodiment are designated by the same or corresponding reference numerals, and description thereof will be omitted or simplified.
　第２実施形態のアンギュラ玉軸受１０では、保持器１４ａの一対の外径側リップ部２４は、ポケット２０の外径側、且つ保持器１４の軸方向寄りに設けられ、互いに軸方向に対向している点において、第１実施形態のものと異なる。即ち、本実施形態の各外径側リップ部２４を構成するリップ部円筒面２６と傾斜面２７とは、ポケット２０の内面の円周方向中間部に対して円周方向に対称に、該内面の軸方向中間部を越えない大きさに設定されている。例えば、本実施形態の外径側リップ部２４は、ポケット２０の円周方向中間部を含み、ポケット２０の円周方向に沿って形成されている。 In the angular ball bearing 10 of the second embodiment, the pair of outer diameter side lip portions 24 of the cage 14a are provided on the outer diameter side of the pocket 20 and on the axial direction side of the cage 14, and are opposed to each other in the axial direction. This is different from that of the first embodiment. That is, the lip portion cylindrical surface 26 and the inclined surface 27 forming each outer diameter side lip portion 24 of the present embodiment are arranged symmetrically in the circumferential direction with respect to the circumferential intermediate portion of the inner surface of the pocket 20. The size is set so that it does not exceed the intermediate portion in the axial direction. For example, the outer diameter side lip portion 24 of the present embodiment includes the circumferential intermediate portion of the pocket 20 and is formed along the circumferential direction of the pocket 20.
　この場合も、保持器１４ａは、Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ａの条件を満足する。また、外径側リップ部２４は、玉１３のピッチ円上に中心Ｏが位置する玉１３と保持器１４ａとが、アンギュラ玉軸受１０の軸方向に相対移動して、玉１３がポケット２０の内径側開口部２１と接触した際、玉１３と干渉しない大きさに形成される。これにより、保持器１４ａの軸方向寄りに設けられた外径側リップ部２４が、保持器１４ａの自励振動を抑制する効果を阻害するのを防止できる。
　その他の構成及び作用については、第１実施形態のものと同様である。 Also in this case, the cage 14a satisfies the conditions of B> PCD / 2 and PCD / 2> A. Further, in the outer diameter side lip portion 24, the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14 a relatively move in the axial direction of the angular ball bearing 10, so that the ball 13 is retained in the pocket 20. It is formed in a size that does not interfere with the balls 13 when coming into contact with the inner diameter side opening 21. As a result, it is possible to prevent the outer diameter side lip portion 24 provided closer to the axial direction of the cage 14a from inhibiting the effect of suppressing self-excited vibration of the cage 14a.
Other configurations and operations are similar to those of the first embodiment.
（第３実施形態）
　次に、第３実施形態に係るアンギュラ玉軸受について、図８及び図９を参照して説明する。なお、第１実施形態と同等部分については、同一又は相当符号を付して、説明を省略又は簡略化する。 (Third Embodiment)
Next, an angular contact ball bearing according to the third embodiment will be described with reference to FIGS. 8 and 9. The same parts as those in the first embodiment are designated by the same or corresponding reference numerals, and description thereof will be omitted or simplified.
　第３実施形態のアンギュラ玉軸受１０では、保持器１４ｂの外径側リップ部２４が、ポケット２０の外径側の全周に亘って設けられている点において、第１実施形態のものと異なる。したがって、外径側リップ部２４を構成するリップ部円筒面２６と傾斜面２７とは、ポケット２０の全周に亘って形成されている。 The angular ball bearing 10 of the third embodiment is different from that of the first embodiment in that the outer diameter side lip portion 24 of the cage 14b is provided over the entire circumference of the pocket 20 on the outer diameter side. . Therefore, the lip portion cylindrical surface 26 and the inclined surface 27 forming the outer diameter side lip portion 24 are formed over the entire circumference of the pocket 20.
　この場合も、保持器１４ｂは、Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ａの条件を満足する。また、外径側リップ部２４は、玉１３のピッチ円上に中心Ｏが位置する玉１３と保持器１４ｂとが、アンギュラ玉軸受１０の回転軸及びポケット２０の中心軸線Ｌ１を含む仮想平面ＰＬに対して垂直方向に相対移動して、玉１３が円筒面２３と接触した際、玉１３と干渉しない大きさに形成される。さらに、外径側リップ部２４は、玉１３のピッチ円上に中心Ｏが位置する玉１３と保持器１４ａとが、アンギュラ玉軸受１０の軸方向に相対移動して、玉１３がポケット２０の内径側開口部２１と接触した際、玉１３と干渉しない大きさに形成される。これにより、ポケット２０の全周に亘って形成される外径側リップ部２４を有する場合でも、保持器１４が安定して回転駆動されるとともに、保持器１４ｂの自励振動を抑制する効果が阻害されるのを防止できる。
　その他の構成及び作用については、第１実施形態のものと同様である。 Also in this case, the cage 14b satisfies the conditions of B> PCD / 2 and PCD / 2> A. Further, in the outer diameter side lip portion 24, the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14b include a virtual plane PL including the rotation axis of the angular ball bearing 10 and the central axis L1 of the pocket 20. When the ball 13 comes into contact with the cylindrical surface 23 by moving relative to the vertical direction, the size is formed so as not to interfere with the ball 13. Further, in the outer diameter side lip portion 24, the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14a relatively move in the axial direction of the angular ball bearing 10, so that the ball 13 is retained in the pocket 20. It is formed in a size that does not interfere with the balls 13 when coming into contact with the inner diameter side opening 21. As a result, even when the outer diameter side lip portion 24 formed over the entire circumference of the pocket 20 is provided, the cage 14 is stably driven to rotate and the self-excited vibration of the cage 14b is suppressed. It can be prevented from being hindered.
Other configurations and operations are similar to those of the first embodiment.
（第４実施形態）
　次に、第４実施形態に係るアンギュラ玉軸受について、図１０～図１２を参照して説明する。なお、第１実施形態と同等部分については、同一又は相当符号を付して説明を省略又は簡略化する。 (Fourth Embodiment)
Next, an angular contact ball bearing according to the fourth embodiment will be described with reference to FIGS. 10 to 12. The same parts as those in the first embodiment are designated by the same or corresponding reference numerals, and the description will be omitted or simplified.
　第４実施形態のアンギュラ玉軸受では、図１０及び図１１に示すように、保持器１４ｃのポケット２０が、円筒面３３と内径側リップ部３４と、を備える点において、第１実施形態のものと異なる。即ち、ポケット２０は、その中心軸線Ｌ１が径方向に延びる円筒面３３と、ポケット２０の内径側、且つ保持器１４ｃの円周方向寄りに設けられる内径側リップ部３４と、を備える。この場合、保持器１４ｃは、径方向に移動した際に、内径側リップ部３４が玉１３に接触し、玉１３によって案内される玉案内方式の保持器である。 In the angular contact ball bearing of the fourth embodiment, as shown in FIGS. 10 and 11, the pocket 20 of the retainer 14c is provided with the cylindrical surface 33 and the inner diameter side lip portion 34 in that of the first embodiment. Different from That is, the pocket 20 includes a cylindrical surface 33 whose center axis L1 extends in the radial direction, and an inner diameter side lip portion 34 provided on the inner diameter side of the pocket 20 and on the circumferential direction side of the cage 14c. In this case, the cage 14c is a ball guide type cage in which the inner diameter side lip portion 34 contacts the ball 13 and is guided by the ball 13 when the cage 14c moves in the radial direction.
　内径側リップ部３４は、ポケット２０の内径側開口部２１から外径側に設けられるリップ部円筒面３６と、リップ部円筒面３６と外径側で連続し、リップ部円筒面３６と円筒面３３とを接続する傾斜面３７と、で構成されている。リップ部円筒面３６は、円筒面３３と同心の部分円筒面であり、円筒面３３より小径となっている。傾斜面３７は、玉１３と保持器１４とが径方向に相対移動して玉１３と内径側リップ部３４とが接触した際のエッジ当たりを防止する。円筒面３３と内径側リップ部３４との境界線３８は、ポケット２０の円周方向に沿って延びる。 The inner diameter side lip portion 34 is continuous on the outer diameter side with the lip portion cylindrical surface 36 provided on the outer diameter side from the inner diameter side opening 21 of the pocket 20, and is continuous with the lip portion cylindrical surface 36 and the cylindrical surface 36. And a slanted surface 37 connecting 33. The lip portion cylindrical surface 36 is a partial cylindrical surface concentric with the cylindrical surface 33, and has a smaller diameter than the cylindrical surface 33. The inclined surface 37 prevents edge contact when the ball 13 and the cage 14 relatively move in the radial direction and the ball 13 and the inner diameter side lip portion 34 come into contact with each other. A boundary line 38 between the cylindrical surface 33 and the inner diameter side lip portion 34 extends along the circumferential direction of the pocket 20.
　また、保持器１４ｃの円周方向寄りに設けられる内径側リップ部３４は、ポケット２０の内径側において、ポケット２０の内面の軸方向中間部に対して円周方向に対称に、該内面の円周方向中間部を越えない大きさに設定されている。例えば、本実施形態の内径側リップ部３４は、ポケット２０の軸方向中間部を含み、ポケット２０の軸方向中間部に対して、±４５°未満の位相範囲内に円周方向に沿って設けられている。 In addition, the inner diameter side lip portion 34 provided nearer to the circumferential direction of the cage 14c is arranged on the inner diameter side of the pocket 20 so as to be symmetrical with respect to the axially intermediate portion of the inner surface of the pocket 20 in the circumferential direction. The size is set so that it does not exceed the middle portion in the circumferential direction. For example, the inner diameter side lip portion 34 of the present embodiment includes the axially intermediate portion of the pocket 20 and is provided along the circumferential direction within a phase range of less than ± 45 ° with respect to the axially intermediate portion of the pocket 20. Has been.
　また、本実施形態では、図１２に示すように、内径側開口部２１における保持器内径の１／２をＢ、玉１３のピッチ円直径をＰＣＤ、ポケット２０の中心軸線Ｌ１に沿った方向における、アンギュラ玉軸受１０の回転軸Ｘから円筒面３３と内径側リップ部３４との境界線３８までの高さをＣとしたとき、Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ｃを満足するように設計されている。 Further, in the present embodiment, as shown in FIG. 12, 1/2 of the cage inner diameter in the inner diameter side opening 21 is B, the pitch circle diameter of the balls 13 is PCD, and the pocket 20 in the direction along the central axis L1 of the pocket 20. , B> PCD / 2 and PCD / 2> C, where C is the height from the rotation axis X of the angular ball bearing 10 to the boundary line 38 between the cylindrical surface 33 and the inner diameter side lip portion 34. Is designed to be.
　ＰＣＤ／２＞Ｃの条件を満足することで、アンギュラ玉軸受１０の運転中に玉１３がポケット２０の内面を介して、保持器１４ｃを回転駆動させる際、図１２に示すように、回転方向（軸受の円周方向）における玉１３と保持器１４ｃの接触位置は、玉１３の赤道部１３ａと、ポケット２０の円筒面３３となり、保持器１４ｃが安定して回転駆動される。 By satisfying the condition of PCD / 2> C, when the balls 13 rotationally drive the cage 14c via the inner surface of the pocket 20 during the operation of the angular ball bearing 10, as shown in FIG. The contact position between the ball 13 and the cage 14c (in the circumferential direction of the bearing) is the equator portion 13a of the ball 13 and the cylindrical surface 33 of the pocket 20, and the cage 14c is stably rotated.
　ただし、内径側リップ部３４は、玉１３のピッチ円上に中心Ｏが位置する玉１３と保持器１４ｃとが、ポケット２０の中心軸線Ｌ１とアンギュラ玉軸受１０の回転軸Ｘを含む仮想平面ＰＬに対して垂直方向に相対移動し、玉１３の赤道部１３ａが円筒面３３と接触した際、玉１３と干渉しない大きさに形成される。これにより、玉１３がポケット２０の内面を介して保持器１４を回転駆動させる際、確実に玉１３の赤道部１３ａとポケット２０の内面を接触させることができ、保持器１４ｃが安定して回転駆動される。 However, in the inner diameter side lip portion 34, the ball 13 whose center O is located on the pitch circle of the ball 13 and the retainer 14c include a virtual plane PL including the central axis L1 of the pocket 20 and the rotation axis X of the angular ball bearing 10. It is formed in such a size that it does not interfere with the ball 13 when the equator portion 13a of the ball 13 comes into contact with the cylindrical surface 33 while moving relative to the vertical direction. As a result, when the ball 13 rotationally drives the cage 14 via the inner surface of the pocket 20, the equator 13a of the ball 13 and the inner surface of the pocket 20 can be surely brought into contact with each other, and the cage 14c rotates stably. Driven.
　一方、Ｂ＞ＰＣＤ／２の条件を満足することで、保持器１４ｃが回転中に軸方向に移動した際、図１０に示すように、保持器１４ｃと玉１３が接触する位置は、玉１３の赤道部１３ａではなく、赤道部１３ａより外径側の表面と、保持器１４ｃのポケット２０の内径側開口部２１との接触となる。 On the other hand, by satisfying the condition of B> PCD / 2, when the cage 14c moves in the axial direction during the rotation, as shown in FIG. Not the equator portion 13a, but the surface on the outer diameter side of the equator portion 13a comes into contact with the inner diameter side opening 21 of the pocket 20 of the cage 14c.
　これにより、保持器１４ｃが自励振動して所謂、保持器音が発生した際、第１実施形態で説明したように、ポケット２０の内径側開口部２１と玉１３が接触することで、内径側開口部２１と玉１３の間に発生する摩擦力によって、保持器１４ｃの径方向の振動は減衰され、自励振動が抑制されて保持器音が抑制される。 As a result, when the cage 14c vibrates by self-excitation and a so-called cage sound is generated, as described in the first embodiment, the inner diameter side opening 21 of the pocket 20 and the balls 13 come into contact with each other. Due to the frictional force generated between the side opening 21 and the ball 13, the radial vibration of the cage 14c is damped, the self-excited vibration is suppressed, and the cage sound is suppressed.
　以上説明したように、本実施形態のアンギュラ玉軸受１０によれば、２つの式、Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ｃを満足することで、保持器１４が安定して回転駆動されると共に、保持器音の発生を抑制することができる。また、本実施形態の保持器１４によれば、玉係止部となる内径側リップ部３４により玉案内とされるので、外輪案内と比べて外輪１１と保持器１４との間の隙間を大きくでき、潤滑剤を玉１３とポケット２０の内面の間に供給しやすく、潤滑性が向上する。
　その他の構成及び作用については、第１実施形態のものと同様である。 As described above, according to the angular ball bearing 10 of the present embodiment, the cage 14 is stably rotationally driven by satisfying the two expressions, B> PCD / 2 and PCD / 2> C. It is also possible to suppress the generation of cage noise. Further, according to the cage 14 of the present embodiment, since the ball guide is performed by the inner diameter side lip portion 34 serving as the ball locking portion, the gap between the outer ring 11 and the cage 14 is larger than that of the outer ring guide. As a result, the lubricant can be easily supplied between the balls 13 and the inner surface of the pocket 20, and the lubricity is improved.
Other configurations and operations are similar to those of the first embodiment.
　尚、本発明は、前述した各実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。
　例えば、外径側リップ部や内径側リップ部は、円周方向において、分割して形成されてもよい。 It should be noted that the present invention is not limited to the above-described embodiments, and can be modified, improved, and the like as appropriate.
For example, the outer diameter side lip portion and the inner diameter side lip portion may be formed separately in the circumferential direction.
　以上の通り、本明細書には次の事項が開示されている。
（１）　内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、前記外輪軌道面及び前記内輪軌道面間に所定の接触角を持って転動自在に配置される複数の玉と、前記複数の玉を転動自在に保持するポケットを有する玉案内方式の保持器と、を備えるアンギュラ玉軸受であって、
　前記保持器は、一対の円環部と、該一対の円環部を軸方向に連結し、円周方向に所定の間隔で配置された複数の柱部と、を備え、
　前記ポケットの内径側開口部では、前記ポケットの全周に亘って保持器内径が等しく、
　前記ポケットは、円筒面と、前記ポケットの外径側に設けられた外径側リップ部と、を備え、
　前記内径側開口部における保持器内径の１／２をＢ、前記玉のピッチ円直径をＰＣＤ、前記ポケットの内径側開口部の直径をＤｐ、Ａ＝Ｂｃｏｓθ、θ＝ｓｉｎ－１｛（Ｄｐ／２）／Ｂ｝としたとき、
　Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ａ
を満足することを特徴とするアンギュラ玉軸受。
　この構成によれば、円周方向における玉と保持器の接触位置は、玉の赤道部とポケットの内面であり、また、軸方向において、玉の赤道部より外径側の表面とポケットの内径側開口部とが接触する位置を与えることができる。これにより、保持器が安定して回転駆動されると共に、保持器の自励振動による保持器音の発生を抑制することができる。また、本実施形態の保持器は、玉案内する際の玉係止部となる外径側リップ部により玉とポケットの内周面の間に潤滑剤溜りが形成され、遠心力により外径側に流れる潤滑剤を潤滑剤溜りで捉えることができ、潤滑性が向上する。また、玉案内の保持器は、外輪案内と比べて外輪と保持器との間の隙間を大きくでき、潤滑剤を玉とポケットの内周面の間に供給しやすく、潤滑性がさらに向上する。 As described above, the following items are disclosed in this specification.
(1) An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a rollable arrangement having a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface. An angular contact ball bearing comprising: a plurality of balls and a cage of a ball guide type having a pocket for rotatably holding the plurality of balls;
The retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction,
At the inner diameter side opening of the pocket, the cage inner diameter is equal over the entire circumference of the pocket,
The pocket includes a cylindrical surface and an outer diameter side lip portion provided on the outer diameter side of the pocket,
1/2 of the cage inner diameter in the inner diameter side opening is B, the pitch circle diameter of the ball is PCD, the diameter of the inner diameter side opening of the pocket is Dp, A = Bcos θ, θ = sin −1 {(Dp / 2) / B},
B> PCD / 2 and PCD / 2> A
Angular contact ball bearing characterized by satisfying.
According to this configuration, the contact position between the ball and the cage in the circumferential direction is the equatorial part of the ball and the inner surface of the pocket, and in the axial direction, the surface on the outer diameter side of the equatorial part of the ball and the inner diameter of the pocket. The position of contact with the side opening can be provided. As a result, the cage can be stably driven to rotate, and generation of cage noise due to self-excited vibration of the cage can be suppressed. In addition, in the cage of the present embodiment, the lubricant reservoir is formed between the balls and the inner peripheral surface of the pocket by the outer diameter side lip portion that becomes the ball locking portion when guiding the balls, and the outer diameter side is formed by the centrifugal force. The lubricant flowing in the can be caught in the lubricant reservoir, and the lubricity is improved. In addition, the cage of the ball guide can make the gap between the outer ring and the cage larger than that of the outer ring guide, so that the lubricant can be easily supplied between the balls and the inner peripheral surface of the pocket, and the lubricity is further improved. .
（２）　前記円筒面と前記外径側リップ部との境界線は、前記ポケットの円周方向に沿って延び、
　前記外径側リップ部は、前記ポケットの外径側開口部から内径側に設けられて、前記円筒面と同心で、前記円筒面より小径のリップ部円筒面と、前記円筒面と前記外径側リップ部との境界線と、前記リップ部円筒面とを接続する傾斜面と、で構成されることを特徴とする（１）に記載のアンギュラ玉軸受。
　この構成によれば、外径側リップ部により玉とポケットの内周面の間に潤滑剤溜りが形成されると共に、玉と外径側リップ部とのエッジ当たりを防止することができる。 (2) A boundary line between the cylindrical surface and the outer diameter side lip portion extends along the circumferential direction of the pocket,
The outer diameter side lip portion is provided on the inner diameter side from the outer diameter side opening portion of the pocket, is concentric with the cylindrical surface, and has a smaller diameter lip portion cylindrical surface than the cylindrical surface, the cylindrical surface and the outer diameter. The angular contact ball bearing according to (1), characterized in that the angular ball bearing comprises a boundary line with the side lip portion and an inclined surface connecting the cylindrical surface of the lip portion.
According to this configuration, the outer diameter side lip portion forms a lubricant reservoir between the ball and the inner peripheral surface of the pocket, and it is possible to prevent edge contact between the ball and the outer diameter side lip portion.
（３）　前記外径側リップ部は、前記ポケットの外径側、且つ前記保持器の円周方向寄りに設けられ、互いに円周方向に対向する一対の外径側リップ部を有することを特徴とする（２）に記載のアンギュラ玉軸受。
　この構成によれば、保持器の円周方向寄りに設けられた外径側リップ部により、玉を係止できるとともに、玉とポケットの内周面の間に潤滑剤溜りを形成することができる。 (3) The outer diameter side lip portion has a pair of outer diameter side lip portions that are provided on the outer diameter side of the pocket and near the circumferential direction of the cage and that face each other in the circumferential direction. The angular contact ball bearing according to (2).
With this configuration, the balls can be locked by the outer diameter side lip portion provided nearer to the circumferential direction of the cage, and the lubricant reservoir can be formed between the balls and the inner peripheral surface of the pocket. .
（４）　前記外径側リップ部は、前記ポケットの外径側、且つ前記保持器の軸方向寄りに設けられ、互いに軸方向に対向する一対の外径側リップ部を有することを特徴とする（２）に記載のアンギュラ玉軸受。
　この構成によれば、保持器の軸方向寄りに設けられた外径側リップ部により、玉を係止できるとともに、玉とポケットの内周面の間に潤滑剤溜りを形成することができる。 (4) The outer diameter side lip portion has a pair of outer diameter side lip portions that are provided on the outer diameter side of the pocket and closer to the axial direction of the cage and that face each other in the axial direction. The angular contact ball bearing according to (2).
According to this structure, the ball can be locked by the outer diameter side lip portion provided closer to the axial direction of the cage, and the lubricant reservoir can be formed between the ball and the inner peripheral surface of the pocket.
（５）　前記外径側リップ部は、前記ポケットの外径側の全周に亘って設けられることを特徴とする（２）に記載のアンギュラ玉軸受。
　この構成によれば、ポケットの外径側の全周に亘って設けられた外径側リップ部により、玉を係止できるとともに、玉とポケットの内周面の間に潤滑剤溜りを形成することができる。 (5) The angular ball bearing according to (2), wherein the outer diameter side lip portion is provided over the entire circumference of the pocket on the outer diameter side.
According to this configuration, the ball can be locked by the outer diameter lip portion provided over the entire outer diameter side of the pocket, and the lubricant reservoir is formed between the ball and the inner peripheral surface of the pocket. be able to.
（６）　前記外径側リップ部は、前記玉のピッチ円上に中心が位置する前記玉と前記保持器とが、前記アンギュラ玉軸受の回転軸及び前記ポケットの中心軸線を含む仮想平面に対して垂直方向に相対移動して、前記玉が前記円筒面と接触した際、前記玉と干渉しない大きさに形成されることを特徴とする（３）又は（５）に記載のアンギュラ玉軸受。
　この構成によれば、玉がポケットの内周面を介して保持器を回転駆動させる際、確実に玉の赤道部とポケットの内周面を接触させることができ、保持器が安定して回転駆動される。 (6) With respect to the outer diameter side lip portion, with respect to an imaginary plane including the rotation axis of the angular ball bearing and the center axis of the pocket, the ball and the retainer whose center is located on the pitch circle of the ball The angular contact ball bearing according to (3) or (5), wherein the angular ball bearing is formed in a size that does not interfere with the ball when the ball comes into contact with the cylindrical surface by relatively moving in the vertical direction.
According to this configuration, when the ball drives the cage to rotate via the inner peripheral surface of the pocket, the equator of the ball and the inner peripheral surface of the pocket can be surely brought into contact with each other, so that the cage rotates stably. Driven.
（７）　前記外径側リップ部は、前記玉のピッチ円上に中心が位置する前記玉と前記保持器とが、前記アンギュラ玉軸受の軸方向に相対移動して、前記玉が前記ポケットの内径側開口部と接触した際、前記玉と干渉しない大きさに形成されることを特徴とする（４）～（６）のいずれかに記載のアンギュラ玉軸受。
　この構成によれば、外径側リップ部によって保持器の自励振動を抑制する効果が阻害されるのを防止できる。 (7) In the outer diameter side lip portion, the ball, the center of which is located on the pitch circle of the ball, and the retainer relatively move in the axial direction of the angular ball bearing, and the ball is in the pocket. The angular contact ball bearing according to any one of (4) to (6), which is formed in a size that does not interfere with the ball when it comes into contact with the opening on the inner diameter side.
According to this configuration, it is possible to prevent the effect of suppressing the self-excited vibration of the cage from being hindered by the outer diameter side lip portion.
（８）　内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、前記外輪軌道面及び前記内輪軌道面間に所定の接触角を持って転動自在に配置される複数の玉と、前記複数の玉を転動自在に保持するポケットを有する玉案内方式の保持器と、を備えるアンギュラ玉軸受であって、
　前記保持器は、一対の円環部と、該一対の円環部を軸方向に連結し、円周方向に所定の間隔で配置された複数の柱部と、を備え、
　前記ポケットの内径側開口部では、前記ポケットの全周に亘って保持器内径が等しく、
　前記ポケットは、円筒面と、前記ポケットの内径側、且つ前記保持器の円周方向寄りに設けられ、互いに円周方向に対向する一対の内径側リップ部と、を備え、
　前記内径側開口部における保持器内径の１／２をＢ、前記玉のピッチ円直径をＰＣＤ、前記ポケットの中心軸線に沿った方向における、前記アンギュラ玉軸受の回転軸から前記円筒面と前記内径側リップ部との境界線までの高さをＣとしたとき、
　Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ｃ
を満足することを特徴とするアンギュラ玉軸受。
　この構成によれば、円周方向における玉と保持器の接触位置は、玉の赤道部とポケットの内面であり、また、軸方向において、玉の赤道部より外径側の表面とポケットの内径側開口部とが接触する位置を与えることができる。これにより、保持器が安定して回転駆動されると共に、保持器の自励振動による保持器音の発生を抑制することができる。また、本実施形態の保持器は、玉係止部となる内径側リップ部により玉案内とされるので、外輪案内と比べて外輪と保持器との間の隙間を大きくでき、潤滑剤を玉とポケットの内周面の間に供給しやすく、潤滑性が向上する。 (8) An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a rollable arrangement with a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface. An angular contact ball bearing comprising: a plurality of balls and a cage of a ball guide type having a pocket for rotatably holding the plurality of balls;
The retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction,
At the inner diameter side opening of the pocket, the cage inner diameter is equal over the entire circumference of the pocket,
The pocket includes a cylindrical surface, a pair of inner diameter side lip portions that are provided on the inner diameter side of the pocket, and that are provided closer to the circumferential direction of the cage, and that face each other in the circumferential direction.
½ of the cage inner diameter in the inner diameter side opening is B, the pitch circle diameter of the ball is PCD, the cylindrical surface and the inner diameter from the rotation axis of the angular ball bearing in the direction along the central axis of the pocket. When the height to the boundary with the side lip is C,
B> PCD / 2 and PCD / 2> C
Angular contact ball bearing characterized by satisfying.
According to this configuration, the contact position between the ball and the cage in the circumferential direction is the equatorial part of the ball and the inner surface of the pocket, and in the axial direction, the surface on the outer diameter side of the equatorial part of the ball and the inner diameter of the pocket. The position of contact with the side opening can be provided. As a result, the cage can be stably driven to rotate, and generation of cage noise due to self-excited vibration of the cage can be suppressed. Further, since the cage of the present embodiment is ball guided by the inner diameter side lip that serves as a ball locking portion, the gap between the outer ring and the cage can be made larger than that of the outer ring guide, and the lubricant can be used as a ball. And the inner peripheral surface of the pocket are easily supplied, and the lubricity is improved.
（９）　前記円筒面と前記内径側リップ部との境界線は、前記ポケットの円周方向に沿って延び、
　前記内径側リップ部は、前記ポケットの内径側開口部から外径側に設けられて、前記円筒面と同心で、前記円筒面より小径のリップ部円筒面と、前記境界線と前記リップ部円筒面とを接続する傾斜面と、で構成されることを特徴とする（８）に記載のアンギュラ玉軸受。
　この構成によれば、玉と内径側リップ部とのエッジ当たりを防止することができる。 (9) A boundary line between the cylindrical surface and the inner diameter side lip portion extends along the circumferential direction of the pocket,
The inner diameter side lip portion is provided on the outer diameter side from the inner diameter side opening of the pocket, is concentric with the cylindrical surface, and has a lip portion cylindrical surface having a smaller diameter than the cylindrical surface, the boundary line and the lip portion cylinder. An angular contact ball bearing according to (8), characterized in that the angular contact ball bearing is configured by an inclined surface connecting the surface.
According to this configuration, it is possible to prevent edge contact between the ball and the inner diameter side lip portion.
（１０）　前記内径側リップ部は、前記玉のピッチ円上に中心が位置する前記玉と前記保持器とが、前記アンギュラ玉軸受の回転軸及び前記ポケットの中心軸線を含む仮想平面に対して垂直方向に相対移動して、前記玉が前記円筒面と接触した際、前記玉と干渉しない大きさに形成されることを特徴とする（８）又は（９）に記載のアンギュラ玉軸受。
　この構成によれば、玉がポケットの内周面を介して保持器を回転駆動させる際、確実に玉の赤道部とポケットの内周面を接触させることができ、保持器が安定して回転駆動される。 (10) In the inner diameter side lip portion, with respect to a virtual plane including the rotation axis of the angular ball bearing and the center axis of the pocket, the ball and the retainer whose center is located on the pitch circle of the ball The angular contact ball bearing according to (8) or (9), wherein the angular contact ball bearing is formed to have a size that does not interfere with the ball when the ball moves relative to the vertical direction and comes into contact with the cylindrical surface.
According to this configuration, when the ball drives the cage to rotate via the inner peripheral surface of the pocket, the equator of the ball and the inner peripheral surface of the pocket can be surely brought into contact with each other, so that the cage rotates stably. Driven.
　なお、本出願は、２０１８年１０月１５日出願の日本特許出願（特願２０１８－１９４４２５）に基づくものであり、その内容は本出願の中に参照として援用される。 The present application is based on the Japanese patent application (Japanese Patent Application No. 2018-194425) filed on October 15, 2018, the contents of which are incorporated by reference in the present application.
１０　　アンギュラ玉軸受
１１　　外輪
１１ａ　　　　外輪軌道面
１２　　内輪
１２ａ　　　　内輪軌道面
１３　　玉
１４，１４ａ，１４ｂ，１４ｃ　　保持器
１５，１６　　円環部
１７　　柱部
２０　　ポケット
２１　　内径側開口部
２３，３３　　円筒面
２４　　外径側リップ部
２５　　外径側開口部
２６，３６　　リップ部円筒面
２７，３７　　傾斜面
２８，３８　　境界線
３４　　内径側リップ部
Ｂ　　　内径側開口部における保持器内径の１／２
Ｃ　　　ポケットの中心軸線に沿った方向における、アンギュラ玉軸受の回転軸から円筒面と内径側リップ部との境界線までの高さ
Ｄｐ　　ポケット径（ポケットの内径側開口部の直径）
Ｌ１　　中心軸線
ＰＣＤ　　　　玉のピッチ円直径
α　　　接触角 10 Angular Ball Bearing 11 Outer Ring 11a Outer Ring Raceway 12 Inner Ring 12a Inner Ring Raceway 13 Balls 14, 14a, 14b, 14c Retainer 15, 16 Ring Part 17 Column 20 Pocket 21 Inner Diameter Side Opening 23, 33 Cylindrical Surface 24 Outer Diameter side lip portion 25 Outer diameter side opening portion 26, 36 Lip portion cylindrical surface 27, 37 Sloping surface 28, 38 Boundary line 34 Inner diameter side lip portion B 1/2 of cage inner diameter at inner diameter side opening portion
C Height from the axis of rotation of the angular ball bearing to the boundary line between the cylindrical surface and the lip on the inner diameter side in the direction along the center axis of the pocket Dp Pocket diameter (diameter of the opening on the inner diameter side of the pocket)
L1 Center axis PCD Ball pitch circle diameter α Contact angle

Claims (10)

  1. 　内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、前記外輪軌道面及び前記内輪軌道面間に所定の接触角を持って転動自在に配置される複数の玉と、前記複数の玉を転動自在に保持するポケットを有する玉案内方式の保持器と、を備えるアンギュラ玉軸受であって、
    　前記保持器は、一対の円環部と、該一対の円環部を軸方向に連結し、円周方向に所定の間隔で配置された複数の柱部と、を備え、
    　前記ポケットの内径側開口部では、前記ポケットの全周に亘って保持器内径が等しく、
    　前記ポケットは、円筒面と、前記ポケットの外径側に設けられた外径側リップ部と、を備え、
    　前記内径側開口部における保持器内径の１／２をＢ、前記玉のピッチ円直径をＰＣＤ、前記ポケットの内径側開口部の直径をＤｐ、Ａ＝Ｂｃｏｓθ、θ＝ｓｉｎ－１｛（Ｄｐ／２）／Ｂ｝としたとき、
    　Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ａ
    を満足することを特徴とするアンギュラ玉軸受。     An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rollably arranged with a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface. An angular contact ball bearing comprising a ball and a ball guide type cage having a pocket for rotatably holding the plurality of balls.
    The retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction,
    At the inner diameter side opening of the pocket, the cage inner diameter is equal over the entire circumference of the pocket,
    The pocket includes a cylindrical surface and an outer diameter side lip portion provided on the outer diameter side of the pocket,
    1/2 of the cage inner diameter in the inner diameter side opening is B, the pitch circle diameter of the ball is PCD, the diameter of the inner diameter side opening of the pocket is Dp, A = Bcos θ, θ = sin −1 {(Dp / 2) / B},
    B> PCD / 2 and PCD / 2> A
    Angular contact ball bearing characterized by satisfying.
  2. 　前記円筒面と前記外径側リップ部との境界線は、前記ポケットの円周方向に沿って延び、
    　前記外径側リップ部は、前記ポケットの外径側開口部から内径側に設けられて、前記円筒面と同心で、前記円筒面より小径のリップ部円筒面と、前記円筒面と前記外径側リップ部との境界線と、前記リップ部円筒面とを接続する傾斜面と、で構成されることを特徴とする請求項１に記載のアンギュラ玉軸受。     A boundary line between the cylindrical surface and the outer diameter side lip portion extends along the circumferential direction of the pocket,
    The outer diameter side lip portion is provided on the inner diameter side from the outer diameter side opening portion of the pocket, is concentric with the cylindrical surface, and has a smaller diameter lip portion cylindrical surface than the cylindrical surface, the cylindrical surface and the outer diameter. The angular ball bearing according to claim 1, wherein the angular ball bearing comprises a boundary line with a side lip portion and an inclined surface connecting the cylindrical surface of the lip portion.
  3. 　前記外径側リップ部は、前記ポケットの外径側、且つ前記保持器の円周方向寄りに設けられ、互いに円周方向に対向する一対の外径側リップ部を有することを特徴とする請求項２に記載のアンギュラ玉軸受。 The outer diameter side lip portion is provided on the outer diameter side of the pocket and near the circumferential direction of the cage, and has a pair of outer diameter side lip portions facing each other in the circumferential direction. The angular contact ball bearing according to Item 2.
  4. 　前記外径側リップ部は、前記ポケットの外径側、且つ前記保持器の軸方向寄りに設けられ、互いに軸方向に対向する一対の外径側リップ部を有することを特徴とする請求項２に記載のアンギュラ玉軸受。 3. The outer diameter side lip portion is provided on the outer diameter side of the pocket and on the axial direction side of the retainer, and has a pair of outer diameter side lip portions axially opposed to each other. Angular contact ball bearing described in.
  5. 　前記外径側リップ部は、前記ポケットの外径側の全周に亘って設けられることを特徴とする請求項２に記載のアンギュラ玉軸受。 The angular contact ball bearing according to claim 2, wherein the outer diameter side lip portion is provided over the entire circumference of the pocket on the outer diameter side.
  6. 　前記外径側リップ部は、前記玉のピッチ円上に中心が位置する前記玉と前記保持器とが、前記アンギュラ玉軸受の回転軸及び前記ポケットの中心軸線を含む仮想平面に対して垂直方向に相対移動して、前記玉が前記円筒面と接触した際、前記玉と干渉しない大きさに形成されることを特徴とする請求項３又は５に記載のアンギュラ玉軸受。 The outer diameter side lip portion, the ball and the retainer centered on the pitch circle of the ball, is a direction perpendicular to a virtual plane including the rotation axis of the angular ball bearing and the central axis of the pocket. The angular ball bearing according to claim 3 or 5, wherein the angular ball bearing is formed to have a size that does not interfere with the ball when the ball comes into relative contact with the cylindrical surface by moving relative to the ball.
  7. 　前記外径側リップ部は、前記玉のピッチ円上に中心が位置する前記玉と前記保持器とが、前記アンギュラ玉軸受の軸方向に相対移動して、前記玉が前記ポケットの内径側開口部と接触した際、前記玉と干渉しない大きさに形成されることを特徴とする請求項４～６のいずれか１項に記載のアンギュラ玉軸受。 In the outer diameter side lip portion, the ball and the retainer whose center is located on the pitch circle of the ball are relatively moved in the axial direction of the angular ball bearing, and the ball is opened on the inner diameter side of the pocket. The angular ball bearing according to any one of claims 4 to 6, wherein the angular ball bearing is formed in a size that does not interfere with the ball when it comes into contact with the portion.
  8. 　内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、前記外輪軌道面及び前記内輪軌道面間に所定の接触角を持って転動自在に配置される複数の玉と、前記複数の玉を転動自在に保持するポケットを有する玉案内方式の保持器と、を備えるアンギュラ玉軸受であって、
    　前記保持器は、一対の円環部と、該一対の円環部を軸方向に連結し、円周方向に所定の間隔で配置された複数の柱部と、を備え、
    　前記ポケットの内径側開口部では、前記ポケットの全周に亘って保持器内径が等しく、
    　前記ポケットは、円筒面と、前記ポケットの内径側、且つ前記保持器の円周方向寄りに設けられ、互いに円周方向に対向する一対の内径側リップ部と、を備え、
    　前記内径側開口部における保持器内径の１／２をＢ、前記玉のピッチ円直径をＰＣＤ、前記ポケットの中心軸線に沿った方向における、前記アンギュラ玉軸受の回転軸から前記円筒面と前記内径側リップ部との境界線までの高さをＣとしたとき、
    　Ｂ＞ＰＣＤ／２、且つ、ＰＣＤ／２＞Ｃ
    を満足することを特徴とするアンギュラ玉軸受。     An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rollably arranged with a predetermined contact angle between the outer ring raceway surface and the inner ring raceway surface. An angular contact ball bearing comprising a ball and a ball guide type cage having a pocket for rotatably holding the plurality of balls.
    The retainer includes a pair of annular portions, and a plurality of pillar portions axially connecting the pair of annular portions and arranged at predetermined intervals in the circumferential direction,
    At the inner diameter side opening of the pocket, the cage inner diameter is equal over the entire circumference of the pocket,
    The pocket includes a cylindrical surface, a pair of inner diameter side lip portions that are provided on the inner diameter side of the pocket, and that are provided closer to the circumferential direction of the cage, and that face each other in the circumferential direction.
    ½ of the cage inner diameter in the inner diameter side opening is B, the pitch circle diameter of the ball is PCD, the cylindrical surface and the inner diameter from the rotation axis of the angular ball bearing in the direction along the central axis of the pocket. When the height to the boundary with the side lip is C,
    B> PCD / 2 and PCD / 2> C
    Angular contact ball bearing characterized by satisfying.
  9. 　前記円筒面と前記内径側リップ部との境界線は、前記ポケットの円周方向に沿って延び、
    　前記内径側リップ部は、前記ポケットの内径側開口部から外径側に設けられて、前記円筒面と同心で、前記円筒面より小径のリップ部円筒面と、前記境界線と前記リップ部円筒面とを接続する傾斜面と、で構成されることを特徴とする請求項８に記載のアンギュラ玉軸受。     A boundary line between the cylindrical surface and the inner diameter side lip portion extends along the circumferential direction of the pocket,
    The inner diameter side lip portion is provided on the outer diameter side from the inner diameter side opening of the pocket, is concentric with the cylindrical surface, and has a lip portion cylindrical surface having a smaller diameter than the cylindrical surface, the boundary line and the lip portion cylinder. The angular contact ball bearing according to claim 8, wherein the angular contact ball bearing is configured by an inclined surface connecting the surface and the inclined surface.
  10. 　前記内径側リップ部は、前記玉のピッチ円上に中心が位置する前記玉と前記保持器とが、前記アンギュラ玉軸受の回転軸及び前記ポケットの中心軸線を含む仮想平面に対して垂直方向に相対移動して、前記玉が前記円筒面と接触した際、前記玉と干渉しない大きさに形成されることを特徴とする請求項８又は９に記載のアンギュラ玉軸受。 The inner diameter side lip portion, the ball and the retainer centered on the pitch circle of the ball, in the direction perpendicular to a virtual plane including the rotation axis of the angular ball bearing and the central axis of the pocket. The angular ball bearing according to claim 8 or 9, wherein the angular ball bearing is formed in a size that does not interfere with the ball when the ball comes into relative contact with the cylindrical surface by relative movement.
PCT/JP2019/037403 2018-10-15 2019-09-24 Angular ball bearing WO2020080048A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647269A (en) * 1970-05-15 1972-03-07 Barden Corp Stable bearing cage
JPH02122215U (en) * 1989-03-20 1990-10-05
JP2016089958A (en) * 2014-11-05 2016-05-23 日本精工株式会社 Ball bearing
DE102015215460A1 (en) * 2015-08-13 2017-02-16 Schaeffler Technologies AG & Co. KG Angular contact ball bearings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647269A (en) * 1970-05-15 1972-03-07 Barden Corp Stable bearing cage
JPH02122215U (en) * 1989-03-20 1990-10-05
JP2016089958A (en) * 2014-11-05 2016-05-23 日本精工株式会社 Ball bearing
DE102015215460A1 (en) * 2015-08-13 2017-02-16 Schaeffler Technologies AG & Co. KG Angular contact ball bearings

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