CN106662152A - Crown cage and angular contact ball bearing - Google Patents
Crown cage and angular contact ball bearing Download PDFInfo
- Publication number
- CN106662152A CN106662152A CN201580036047.6A CN201580036047A CN106662152A CN 106662152 A CN106662152 A CN 106662152A CN 201580036047 A CN201580036047 A CN 201580036047A CN 106662152 A CN106662152 A CN 106662152A
- Authority
- CN
- China
- Prior art keywords
- ball
- ring
- crown type
- type retainer
- pocket hole
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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Classifications
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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
- 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
- F16C33/41—Ball cages comb-shaped
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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
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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
- 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
- F16C33/44—Selection of substances
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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
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators
Abstract
The invention discloses a crown cage and an angular contact ball bearing. According to the invention, a notch (34) is provided in the circumferential center of the tip end of a pillar section (32), whereby a pair of pawls (36) are formed in both circumferential sides. The relationship between the distance L between adjacent balls (3) and the main pitch circumferential length [phi]dm, which is the product of the main pitch circle diameter dm and the circular constant [phi], satisfies the equation 2.5 X 10-3 <= L/[phi]dm <= 13 X 10-3. The relationship between the circumferential minimum thickness M of the pillar section (32), the circumferential width N of the pawls (36), and the main pitch circumferential length [phi]dm, satisfies the equation -3.5 X 10-3 <= (M-2N)/ [phi]dm < 0.
Description
Technical field
The present invention relates to crown type retainer and angular contact ball bearing.
Background technology
In lathes such as numerically controlled lathe, milling machine, machining center, composite processor, five-axis robot machines, it is mounted with main spindle box, adds
In the direct acting feed mechanism of the base of work thing, using the ball-screw for converting rotational motion into linear motion.As to the rolling
The bearing that the shaft end of ballscrew is rotationally supported, using angular contact ball bearing (referring for example to patent document 1).Such corner connection
Tactile ball bearing is mounted with main spindle box, the species of the base of machining object, size according to the lathe for using, using bearing bore diameter size
ForThe bearing of left and right.
Cutting load that work in-process is produced, with anxious acceleration move main spindle box and base in the case of inertia loading Jing
Angular contact ball bearing is acted on by ball-screw as axial load.The tendency that nearest lathe has is：With high efficiency processing
Inertia loading is caused to become big for purpose cutting load, fast feed, acting on ball-screw supporting angular contact ball bearing has
Big axial load.
Therefore, the angular contact ball bearing of such ball-screw supporting needs to take into account to increase rolling fatigue life：
The increase of load capacity and the high rigidity for maintaining machining accuracy.
In order to take into account these, increasing bearing size, or increase the columns of combination just can tackle.If however, increase axle
Size is held, then in ball-screw shaft end, space can increase.In addition, if the columns of combination is excessive, the meeting of ball screw unit part
Become change big.As a result, the necessary base areas, the increase of short transverse size due to lathe, therefore the maximization in bearing,
There is the limit in columns increase aspect.
In addition, in conventional angular contact ball bearing, being kept using the inclination shape cutting in axial both sides with a pair of rings
Frame (resin cage of metal cutting or injection mo(u)lding) (referring for example to patent document 2 or 3).Such two side rings structure
The retainer made is good in terms of intensity, but in the case where the both ends of the surface of bearing are mounted with the construction of seal, the sky of axial direction
Between it is not enough.In addition, the volume of bearing interior space is also little, encloses oil quantity and be also limited.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2000-104742 publications
Patent document 2：Japanese Unexamined Patent Publication 2005-61508 publications
Patent document 3：Japanese Patent Publication 3-49417 publication
The content of the invention
The present invention problem to be solved
The present invention is completed in view of the foregoing, its object is to provide a kind of crown type retainer and angular contact ball axle
Hold, can in a limited space take into account load capacity increases and high rigidity.
For solution to problem
The above-mentioned purpose of the present invention constitutes realization by following.
(1) a kind of crown type retainer, including：
Substantially circular ring portion；
Multiple post portions, from the face side or rear side of the ring portion at a predetermined interval to axially projecting；
Multiple pocket hole portions, form between the adjacent post portion, can respectively keep ball；
The crown type retainer is manufactured and for ball bearing by injection mo(u)lding, wherein,
The circumferentially intermediate of end in the post portion is provided with cut portion, so as to form a pair of claws in circumferential both sides,
The mutual ball pitch circumference degree that pi is multiplied by apart from L and ball pitch diameter dm of the adjacent ball
The relation of π dm, meets：
2.5×10-3≤L/πdm≤13×10-3,
The circumferencial direction minimum wall thickness (MINI W.) M in the post portion, circumferential width N of the claw and ball pitch circle week
The relation of length π dm, meets：
-3.5×10-3≤ (M-2N)/π dm ＜ 0.
(2) the crown type retainer as described in (1),
The sphere centre position of the pocket hole portion and the radial center position in the most outer diameter part of the ring portion and innermost diameter portion
Put, be radially staggered.
(3) the crown type retainer as described in (1),
The sphere centre position of the pocket hole portion and the radial center position in the most outer diameter part of the ring portion and innermost diameter portion
Put, radially consistent.
(4) a kind of angular contact ball bearing, including (1)～(3) any one described in crown type retainer.
The effect of invention
Crown type retainer of the invention, due to meeting 2.5 × 10-3≤L/πdm≤13×10-3, therefore, it is possible to increase
The ball number of more each row bearing (on ball pitch circle), can realize the load capacity of bearing increases and high rigidity.Moreover, it is assumed that
2.5×10-3＞ L/ π dm, then the circumferencial direction wall thickness in the post portion of retainer can be excessively thin, when in shaping, cutting hole can be outputed.
Particularly, when the material in crown type retainer is that synthetic resin contains more strengthening material, the flowing of synthetic resin in shaping
Property can be deteriorated, it is easier to output hole.In addition, L/ π dm ＞ 13 × 10-3When, ball number is reduced, and loading load ability and rigidity can drop
It is low.
Further, since meeting -3.5 × 10-3≤ (M-2N)/π dm ＜ 0, are being made with the injection mo(u)lding of axial tension mode
When making crown type retainer, a pair of claws of post portion end will not be damaged in stripping process, axially can extract to form pocket hole
The mold component in portion.It is assumed that -3.5 × 10-3During ＞ (M-2N)/π dm, in the demoulding, claw can be cracked or damaged, and having can
Problem can be carried out to the functional bands of retainer.In addition, during (M-2N)/π dm >=0, pressure will not be produced between a pair of claws of post portion end
Contracting is disturbed, but the distance between adjacent pair pocket hole portion can increase, and as a result causes the ball number being configured on ball pitch circle to reduce,
Therefore, it is possible to make loading load ability and rigidity reduction.
Description of the drawings
Fig. 1 is the sectional view of the angular contact ball bearing involved by the 1st embodiment of the present invention.
Fig. 2 is by the sectional view of the angular contact ball bearing parallel combinations of Fig. 1.
Fig. 3 is to maintain the side view of frame.
Fig. 4 is the figure from axial unilateral observation retainer.
Fig. 5 is the figure that retainer is observed from axial opposite side.
Fig. 6 is the VI-VI sectional views of Fig. 1 and Fig. 4.
Fig. 7 is the VII-VII sections direction view of Fig. 4.
Fig. 8 is the figure for illustrating the configuration status of multiple balls.
Fig. 9 is the sectional view of the retainer illustrated together with spherical mould.
Figure 10 is the sectional view of the angular contact ball bearing involved by the 2nd embodiment of the present invention.
Figure 11 is to maintain the side view of frame.
Figure 12 is the figure from axial unilateral observation retainer.
Figure 13 is the figure that retainer is observed from axial opposite side.
Figure 14 is the sectional view of the angular contact ball bearing involved by the 3rd embodiment of the present invention.
Figure 15 is the figure from axial unilateral observation retainer.
Figure 16 is the XVI-XVI sections direction view of Figure 15.
Figure 17 is the sectional view of the angular contact ball bearing involved by the 4th embodiment of the present invention.
Figure 18 is the figure from axial unilateral observation retainer.
Figure 19 is the sectional view of the angular contact ball bearing involved by the 5th embodiment of the present invention.
Figure 20 is the sectional view of the angular contact ball bearing involved by the variation of the 5th embodiment of the present invention.
Figure 21 is the sectional view of the angular contact ball bearing involved by the 6th embodiment of the present invention.
Figure 22 is the sectional view of conventional deep-groove bearing.
Figure 23 is the figure from the conventional retainer of end on observation.
Figure 24 is the side view of conventional retainer.
The explanation of reference
1：Angular contact ball bearing
3：Ball
4、5：End face
10：Outer ring
11：Roller surface
12：Outer ring recess shoulder
13：Outer ring counterbore
14：Outer ring chamfering
15：Outer ring seal groove
20：Inner ring
21：Roller surface
22：Interior ring recess shoulder
23：Inner ring counterbore
24：Inner ring chamfering
25：Inner ring seal groove
30：Retainer
31：Ring portion
31a：Radially inner side face (radially side, a radial direction another side)
31b：Radial outer side (radial direction another side, radially a side)
32：Post portion
33：Pocket hole portion
33a：Circular arc
33b：1st rectilinear form portion
33c：2nd rectilinear form portion
33g：3rd rectilinear form portion
34：Cut portion
35：Corner
36：Claw
40：Spherical mould
50：Seal member
Oi：Ball center (pocket hole portion sphere centre)
Specific embodiment
Below, crown type retainer and the angular contact ball bearing involved by embodiments of the present invention is illustrated using accompanying drawing.
(the 1st embodiment)
As shown in figure 1, the angular contact ball bearing 1 of present embodiment includes：There is the outer ring 10 of roller surface 11 in inner peripheral surface；
There is the inner ring 20 of roller surface 21 in outer peripheral face；The multiple balls 3 being configured between the roller surface 11,21 of outer ring 10 and inner ring 20；
Rotatably keep ball 3 and be ball guidance mode crown type retainer 30.
The inner peripheral surface of outer ring 10 has：The projection overleaf side (load-side compared with roller surface 11.In Fig. 1 left side) outer ring
Groove shoulder 12；It is recessed in face side (load reverse side compared with roller surface 11.In Fig. 1 right side) outer ring counterbore 13.
The outer peripheral face of inner ring 20 has：Projection is in face side (load-side compared with roller surface 21.In Fig. 1 right side) inner ring
Groove shoulder 22；The recessed overleaf side (load reverse side compared with roller surface 21.In Fig. 1 left side) inner ring counterbore 23.
Herein, the external diameter of inner ring counterbore 23 is D1, when the external diameter of interior ring recess shoulder 22 is D2, D1 ＜ D2.In addition, outer ring is heavy
The internal diameter in hole 13 is D3, when the internal diameter of outer ring recess shoulder 12 is D4, D3 ＞ D4.So, outside due to the interior ring recess shoulder 22 of increase
Footpath D2, reduces the internal diameter D4 of outer ring recess shoulder 12, larger therefore, it is possible to the contact angle α of ball 3 is set to.More specifically,
By outer diameter D set as above 2 and internal diameter D4, contact angle α can be made for 45 °≤α≤65 ° or so.In view of manufacture bearing
When contact angle α deviation, can be for 50 °≤α≤60 ° or so.In such manner, it is possible to increase contact angle α.
In addition, when radial height Hi for making interior ring recess shoulder 22 is Ai (Ai=Hi/Dw) divided by the diameter Dw of ball 3, if
It is set to satisfaction 0.35≤Ai≤0.50.Radial height He of outer ring recess shoulder 12 is Ae (Ae=He/ divided by the diameter Dw of ball 3
When Dw), it is set as satisfaction 0.35≤Ae≤0.50.
Assume in the case of 0.35 ＞ Ai or 0.35 ＞ Ae, due to interior ring recess shoulder 22 or outer ring recess shoulder 12
Radial height Hi, He is too small relative to the diameter Dw of ball 3, therefore contact angle α is less than 45 °, the load of the axial load of bearing
Scarce capacity.In addition, in the case of 0.50 ＜ Ai or 0.50 ＜ Ae, due to the roller surface 11,21 of outer ring 10 and inner ring 20
Overflow the pitch diameter dm of ball 3 and formed, therefore the grinding of outer ring recess shoulder 12 and interior ring recess shoulder 22 becomes difficult,
It is undesirable.
In addition, in the back side side end of outer ring recess shoulder 12, it is provided with being radially oriented outside towards rear side
The outer ring chamfering 14 of taper.In the front side end of interior ring recess shoulder 22, it is provided with being radially oriented towards face side
The inner ring chamfering 24 of the taper of side.The radial width of these outer ring chamferings 14 and inner ring chamfering 24 is more than outer ring recess shoulder 12 and interior
The half of radial height He, Hi of ring recess shoulder 22, is set as than larger value.
Such angular contact ball bearing 1 as shown in Fig. 2 can parallel combinations using.Due to the corner connection of present embodiment
Outer ring recess shoulder 12 and interior ring recess shoulder 22 are arranged tactile ball bearing 1 vicinity of the pitch diameter dm of ball 3, it is assumed that be not provided with
When outer ring chamfering 14 and inner ring chamfering 24, then the inner ring 20 of an angular contact ball bearing 1 and another angular contact ball bearing 1
Outer ring 10 can disturb, and problem can be produced in bearing rotary.In addition, in the case of with oil lubrication come use, it is assumed that be not provided with
Outer ring chamfering 14 and inner ring chamfering 24, then oil will not by the way that between each angular contact ball bearing 1, oil coating is deteriorated, because insufficient lubrication,
Oil remains in Bearing inner and temperature is increased in a large number.So, outer ring chamfering 14 and inner ring chamfering 24, Neng Goufang are provided by
Only inner ring 20 is interfering with each other with outer ring 10, and improves oily coating.Additionally, both outer ring chamfering 14 and inner ring chamfering 24 differ
Establishing a capital needs to arrange, and is provided with least one.
Next, describing the composition of crown type retainer 30 in detail with reference to Fig. 3～7.Crown type retainer 30 is by synthesizing tree
The plastic cage of the ball guidance mode that fat is constituted, the matrix resin for constituting the crown type retainer 30 is polyamide.This
Outward, the species of polyamide is not limited, in addition to polyamide, or polyacetal resin, polyphenylene sulfide, polyethers
Other synthetic resin such as ether ketone, polyimides.Also, the glass fibre as strengthening material, carbon are added with matrix resin
Fiber, aramid fiber etc..In addition, crown type retainer 30 is manufactured by injection mo(u)lding or machining.
Crown type retainer 30 has：With inner ring 20 and the substantially circular (reference picture of ring portion 31 of the arranged coaxial of outer ring 10
1)；Rear side from ring portion 31 is at a predetermined interval to axially projecting multiple post portions 32；Formed between adjacent post portion 32
Multiple pocket hole portions 33.
Herein, in the angular contact ball bearing 1 of present embodiment, due in order to realize the high load capability of axial load,
Radial height He, Hi of outer ring recess shoulder 12 and interior ring recess shoulder 22 is increased, so bearing interior space reduces.Therefore, by
It is that unilateral ring is constructed in the crown type retainer 30 configured in such bearing interior space, therefore is configured to：The counterbore 13 in outer ring
Match somebody with somebody ring placing part 31 between interior ring recess shoulder 22, post portion 32, ring portion 31 are configured between the roller surface 11,21 of outer ring 10 and inner ring 20
It is connected with the radial outside end in post portion 32.
That is, construction is as shown in fig. 7, the sphere centre position of pocket hole portion 33 and the most outer diameter part m1 of ring portion 31 and innermost diameter portion
The radial direction centre position m of m2 is compared, and is staggered to radially inner side (radial direction side).Herein, the sphere centre position of pocket hole portion 33 is
The position consistent with the center of the radius of curvature of pocket hole portion 33.In addition, the most outer diameter part m1 of ring portion 31 is radial outer side 31b,
Innermost diameter portion m2 is radially inner side face 31a.Additionally, in the example in the figures, sphere centre position and the ring portion 31 of pocket hole portion 33
Innermost diameter portion m2 compare and stagger to radially inner side.
As shown in fig. 7, form the side from circumferential observation in the post portion 32 of pocket hole portion 33 being：By the radially inner side of ring portion 31
The a part of excision of the circular arc 33a that face (radially a side) 31a be connected with radial outer side (radial direction another side) 31b and
Into.The center of circular arc 33a represents that radius is represented with r with P.
More specifically, the side from circumferential observation in post portion 32 includes：By the radially inner side end of circular arc 33a (radially
One side end) the 1st rectilinear form portion 33b that cuts off and axially extend and formed.1st rectilinear form portion 33b and circular arc 33a's
Center P is compared and is configured in rear side.In addition, the 1st rectilinear form portion 33b is in axial direction and the center Oi (balls of pocket hole portion 33 of ball 3
Face center) overlap.
Also, the side from circumferential observation in post portion 32 includes：By circular arc 33a, the 1st rectilinear form portion 33b front
Partial Resection that the end of side is connected with the end of the rear side of the radially inner side face 31a of ring portion 31 and the 2nd linear that formed
Shape portion 33c.Therefore, the 2nd rectilinear form portion 33c is with towards face side (side of ring portion 31), and to be radially oriented the straight line in outside
Shape.
In addition, the side from circumferential observation in post portion 32 includes：By radial outside end (the radial direction opposite side of circular arc 33a
End) the 3rd rectilinear form portion 33g that cuts off and axially extend and formed.The radial direction of the 3rd rectilinear form portion 33g and ring portion 31
Lateral surface 31b is formed at grade, is connected with not having step with radial outer side 31b.
So, the side from circumferential observation in post portion 32 is the 3rd rectilinear form portion 33g, circular arc 33a, the 1st rectilinear form portion
The shape of 33b and the 2nd rectilinear form portion 33c connections.
In addition, as shown in fig. 6, forming the rear side (post of pocket hole portion 33, post portion 32 circumferential two sides and ring portion 31
The side of portion 32) the side dome shape that is formed as with the similar shape of ball 3.Herein, the end in post portion 32 is provided with circumferentially intermediate
Cut portion 34, is divided into two troubles.And, in the end in post portion 32, in the circumferential both sides of cut portion 34 a pair of claws 36 are formed.This
Place, the cut portion 34 of present embodiment is the generally V-shaped sharp keen shape in section, but is not limited to the shape, for example, can also have
There is certain plane (plane of such as more than 0.1mm) as bottom surface.By being so provided with cut portion 34, so as to axial direction
The injection mo(u)lding of stretching mode is manufacturing during crown type retainer 30, even if the mould element for forming pocket hole portion 33 is being extracted reluctantly
In the case of, because a pair of claws 36 are to the side elastic deformation of cut portion 34, therefore, it is possible to prevent the side of pocket hole portion 33 in post portion 32
Corner 35 is damaged.
Additionally, it is preferable that the ratio for being added on the strengthening material of the synthetic resin of the material of crown type retainer 30 is 5～30
Weight %.The ratio of the strengthening material in hypothesis synthetic resin composition is more than 30 weight %, then due to crown type retainer 30
Flexibility decline, therefore crown type retainer 30 be molded when mould from pocket hole portion 33 extract reluctantly when, assembling bearing when ball 3 to pocket
When hole portion 33 is pressed into, the corner 35 in post portion 32 can be damaged.Further, since the thermal expansion of crown type retainer 30 depends on matrix material
That is when the ratio of the linear expansion coefficient of resin material, therefore strengthening material is less than 5 weight %, the crown type retainer in bearing rotary
30 thermal expansion is bigger relative to the expansion of the pitch diameter dm of ball 3, and the pocket hole portion 33 of ball 3 and crown type retainer 30 can phase
Collide, the problems such as cause sintering.Therefore, the ratio for making the strengthening material in synthetic resin composition is the scope of 5～30 weight %,
So as to prevent the problems referred to above.
Additionally, as the synthetic resin material of crown type retainer 30, can be suitable for polyamide, polyether-ether-ketone, polyphenylene sulfide,
The resins such as polyimides.As the strengthening material of synthetic resin, glass fibre, carbon fiber, aramid fiber etc. can be suitable for.
In addition, the angular contact ball bearing 1 of present embodiment is in order to increase axial load load capacity, the quantity of ball 3 (is rolled
Pearl number Z) be set to it is more.More specifically, illustrated using Fig. 8.Fig. 8 illustrates 2 be configured on the pitch circle of diameter dm
Individual ball 3.A diameter of Dw of these balls 3, the center of these balls 3 is A, B, and line segment AB is with the intersection point on the surface of ball 3
C, D, the intermediate point of line segment AB is E, and the center of pitch circle is O.In addition, the mutual distance (line segment of center A, B of adjacent ball 3
The distance of AB) it is that ball distance between centers is T, the adjacent mutual distance of ball 3 (distance of line segment CD) is distance between ball
For L, line segment EO is θ with line segment BO angulations (line segment EO and line segment AO angulations).So, line segment AO and line
The distance of section BO is (dm/2), and ball distance between centers T is (dm × sin θ), apart from L is (T-Dw) between ball, and angle, θ is
(180°/Z)。
And, it is designed as：The ball pitch circumference degree π of pi is multiplied by between ball apart from L and ball pitch diameter dm
Between dm, 2.5 × 10-3≤L/πdm≤13×10-3Relation set up.Assume that L/ π dm are less than 2.5 × 10-3, then crown type keeps
The circumferencial direction wall thickness in the post portion 32 of frame 30 becomes too thin, and when in shaping, cutting, can output hole.Particularly, keep in crown type
When the material of frame 30 is that synthetic resin contains more strengthening material, in shaping, the mobility of synthetic resin can be deteriorated, it is easier to
Output hole.In addition, L/ π dm are more than 13 × 10-3When, ball quantity Z is reduced, and the axial load load capacity and rigidity of bearing become
It is low.
So, angular contact ball bearing 1 is designed as satisfaction 2.5 × 10-3≤L/πdm≤13×10-3, i.e. ball quantity Z compares
Many, the circumferencial direction wall thickness in the post portion 32 of crown type retainer 30 can not be thickening relative to standard rolling bearing.And, as shown in fig. 6, with
The circumferencial direction minimum wall thickness (MINI W.) M for post portion 32 is thinning, and circumferential width N of claw 36 also can diminish.Therefore, axial drawing is being used
Stretch the injection mo(u)lding of mode to manufacture during crown type retainer 30, in order to not damage post portion 32 in stripping process, pocket will be formed
The mold component of hole portion 33 is axially being extracted, it is necessary to suitably set these circumferencial direction minimum wall thickness (MINI W.) M and circumferential width
N.More specifically, illustrated using Fig. 9.
In the case of the injection mo(u)lding of axial tension mode, when crown type retainer 30 is taken out from mould inside, mould
In the axially opposing movement of crown type retainer 30.Forming one side of spherical mould 40 of the interior shape of pocket hole portion 33 makes to be formed at post
The end of portion 32 and a pair of claws 36 opposite one another become towards cut portion 34 in circumferencial direction (being arrow A directions in figure) elasticity
Shape, while extracting axial direction (being arrow B directions in figure).
Herein, ball diameter size X (the ball diameter size of pocket hole portion 33) of spherical mould 40 and adjacent post portion 32
In opposed claw 36 the difference (X-Y) apart from Y (claw mouth opening size), be described to be referred to as inadequate unpluging amount
Value.And, in order that ball does not come off from pocket hole portion 33, the inadequate unpluging amount (X-Y) is set to appropriate amount.Inadequate unpluging amount
(X-Y) when too big, claw 36 can exceed the limit of elastic deformation, and in the demoulding, claw 36 can produce damage or excessive modeling
Property deformation, hinder the function of crown type retainer 30.When reluctantly unpluging amount (X-Y) is too little, ball 3 can come off from pocket hole portion 33.Cause
This, inadequate unpluging amount (X-Y) is in view of these contrary functions, are set to the scope of Y/X=0.75～0.95.
In the case of the crown type retainer that common deep-groove bearing is used, if reluctantly unpluging amount is above-mentioned model
Interior appropriate value is enclosed, then will not produce problem as above in claw.But, in crown type retainer 30 used in the present invention
In, according to the distinctive Bearing inner design specification of purposes, the wall thickness in post portion 32 is relatively thin.Therefore, when mould is extracted, the meeting of claw 36
Produce above-mentioned elastic deformation due to spherical mould 40, and can contact with each other in the end opposed pairs claw 36 of post portion 32,
Ground contact is flattened mutually.Can be plastic deformation from elastic deformation transfer when the flattening amount exceedes a certain value, cause claw 36 to damage
Or the problems such as crack.
In the present invention, give and see the problem, through various design search and the result, it was found that will not produce above-mentioned
The following specification of problem.That is, the circumferencial direction minimum wall thickness (MINI W.) M in post portion 32, circumferential width N of claw 36 and ball pitch circle
The relation of Zhou Changdu π dm is set as meeting -3.5 × 10-3≤ (M-2N)/π dm ＜ 0.Herein, as shown in fig. 6, the circumference in post portion 32
Direction minimum wall thickness (MINI W.) M refers to the circumferencial direction wall thickness in the post portion 32 being formed with beyond the position of claw 36 or cut portion 34 most
Little value.
It is assumed that -3.5 × 10-3During ＞ (M-2N)/π dm, then can produce in claw 36 in the demoulding becomes crown type retainer
The crackle of 30 functionally problem or breakage.In addition, during (M-2N)/π dm >=0, in the end opposed pairs claw of post portion 32
Compression interference, but the distance increase between adjacent pocket hole portion 33 will not be produced between 36, causes the ball being configured on ball pitch circle
Number Z is reduced, therefore, loading load ability and rigidity can be reduced.Additionally, in deep-groove bearing etc., due to assembling because of bearing
The restriction of method, ball number is limited, therefore, value (M-2N) will not be less than 0.
In addition, circumferential width N of claw 36 is more little more readily satisfies -3.5 × 10-3≤ (M-2N)/π dm ＜ 0, but
When minimum, resin is difficult to be flowed in the end of claw 36 during injection mo(u)lding, and shaping can be caused bad.Further, since the exerting oneself during demoulding
Extract by force, can crack in the terminal part of claw 36, or the rigidity of claw 36 declines and produces ball 3 and come off.Realizing
The result of the various checkings in the process of the present invention has distinguished that circumferential width N of claw 36 is preferably more than 0.2mm.
Particularly, the resinous wood for being formed in the strengthening material that with the addition of above-mentioned of the crown type retainer 30 of present embodiment
Material, Resin Flow during injection mo(u)lding easily declines, and under conditions of mould is difficult to extract reluctantly, can especially play should
Effect.
Additionally, the depth of the conventional type including ball 103, outer ring 110, inner ring 120 and retainer 130 as shown in figure 22
In the case of groove ball bearing 100, as shown in figure 23 and figure 24, retainer 130 is crown type retainer, is had：It is substantially circular
Ring portion 131；From ring portion 131 at a predetermined interval to axially projecting multiple post portions 132；Formed between adjacent post portion 132
Multiple pocket hole portions 133.
In the deep-groove bearing 100 of such conventional type, because its use is that motor use etc. is relatively lighter
Restriction on load, and the assembling of deep-groove bearing 100, the ball-screw supporting angular contact ball bearing 1 with present embodiment
Compare, ball number is 1/2～1/3 or so, less.So, the spacing of the circumferencial direction of the pocket hole portion 133 of retainer 130 is big, post
It is more separate compared between a pair of corners 35 in the post portion 32 of present embodiment between a pair of corners 135 in portion 132.Therefore, inadequate
When extracting mould, for the purpose that the terminal part in post portion 132 is easily deformed, recess 136 can be provided between a pair of corners 135.
In addition, the bottom surface 137 of recess 136 can be the plane extended in circumferencial direction.And, it is provided with de- in the bottom surface 137 of recess 136
The pin of mould, for the mould of pocket hole portion 133, by the way that pin is axially being pressed out such that it is able to carry out the demoulding with pulling out reluctantly.
So, in the deep-groove bearing 100 of conventional type, what when mould is extracted reluctantly, retainer 130 was damaged can
Energy property is little, thus the problem of the present invention is not realized.
(the 2nd embodiment)
Crown type retainer 30 involved by 2nd embodiment is not provided with the 1st embodiment so as shown in Figure 10～13
The 1st, the 2nd and the 3rd rectilinear form portion 33b, 33c, 33g (with reference to Fig. 7), formed pocket hole portion 33 post portion 32 from circumferential observation
Side be any radius r round shape.
In such composition, in a same manner as in the first embodiment, it is set as satisfaction 2.5 × 10-3≤L/πdm≤13×10-3、
And -3.5 × 10-3≤ (M-2N)/π dm ＜ 0, can obtain effect in a same manner as in the first embodiment.
(the 3rd and the 4th embodiment)
The sphere centre position of pocket hole portion 33 is not limited to shown in the 1st and the 2nd embodiment as shown in Fig. 1 and Figure 10, with
The composition that the most outer diameter part m1 of ring portion 31 staggers compared with the radial direction centre position m of innermost diameter portion m2 to radially inner side.That is, construct
Can also be the 3rd embodiment as shown in Figure 14～Figure 16, the 4th embodiment shown in Figure 17 and Figure 18, pocket hole portion
33 sphere centre position with ring portion 31 most outer diameter part m1 compared with the radial direction centre position m of innermost diameter portion m2 to radial outside
Stagger.
That is, construction can also be with ring placing part 31, in outer ring 10 and interior between outer ring recess shoulder 12 and inner ring counterbore 23
Post portion 32 is configured between the roller surface 11,21 of circle 20, ring portion 31 is connected with the radially inner side end in post portion 32.
Additionally, in the example shown in Figure 14～18, the sphere centre position of pocket hole portion 33 and the most outer diameter part of ring portion 31
M1 (radial outer side 31b) is compared and staggered to radial outside.Even if in this case, because the end in post portion 32 is circumferentially intermediate
It is provided with cut portion 34 and is divided into two troubles, therefore, when with injection mo(u)lding to manufacture retainer 30, it is prevented from because forming pocket hole portion
33 mould element is extracted reluctantly and caused, post portion 32 damages in the corner 35 of the side of pocket hole portion 33.
As shown in figure 16, in the 3rd embodiment, forming the side from circumferential observation in the post portion 32 of pocket hole portion 33 is：
The circular arc 33a that radial outer side (radial direction one side) 31b of ring portion 31 is connected with radially inner side face (radial direction another side) 31a
A part excision form.The center of circular arc 33a represents that radius is represented with r with P.
More specifically, the side from circumferential observation in post portion 32 includes：By the radial outside end of circular arc 33a (radially
One side end) excision and the 1st rectilinear form portion 33b that axially extends and formed.1st rectilinear form portion 33b and round center P
Compare and be configured in face side (load reverse side.Left side in Figure 16).In addition, the 1st rectilinear form portion 33b is in axial direction and ball 3
Center Oi (sphere centre of pocket hole portion 33) overlap.
Also, the side from circumferential observation in post portion 32 includes：By circular arc 33a, the 1st rectilinear form portion 33b back side
Side (load-side.Right side in Figure 16) the end of face side of radial outer side 31b of ring portion 31 of end and circular arc 33a connect
The Partial Resection for connecing and the 2nd rectilinear form portion 33c for being formed.Therefore, the 2nd rectilinear form portion 33c is with towards rear side (ring
The side of portion 31), and it is radially oriented the rectilinear form of inner side.
In addition, the side from circumferential observation in post portion 32 includes：By radially inner side end (the radial direction opposite side of circular arc 33a
End) the 3rd rectilinear form portion 33g that cuts off and axially extend and formed.The radial direction of the 3rd rectilinear form portion 33g and ring portion 31
Medial surface 31a is formed at grade, is connected with not having step with radially inner side face 31a.
So, the side from circumferential observation in post portion 32 is the 3rd rectilinear form portion 33g, circular arc 33a, the 1st rectilinear form portion
The shape of 33b and the 2nd rectilinear form portion 33c connections.
In addition, as shown in figure 17, in the 4th embodiment, the side from circumferential observation in the post portion 32 of pocket hole portion 33 is formed
Face is the round shape of any radius r.
Even if same with above-mentioned embodiment in the case where so constituting, by being set as satisfaction 2.5 × 10-3≤L/π
dm≤13×10-3And -3.5 × 10-3≤ (M-2N)/π dm ＜ 0, it becomes possible to obtain the effect same with above-mentioned embodiment.
(the 5th embodiment)
As shown in figure 19, the most outer diameter part m1 of the sphere centre position of pocket hole portion 33 and ring portion 31 and innermost diameter portion m2
Radial direction centre position m can be radially consistent.In the example in the figures, the inner peripheral surface of outer ring 10 has：Compared with roller surface 11
Projection overleaf side (load-side.In Figure 19 right side) outer ring recess shoulder 12；It is recessed in face side (load compared with roller surface 11
Opposition side.In Figure 19 left side) outer ring counterbore 13.It is convex in the face side and rear side of roller surface 21 in the outer peripheral face of inner ring 20
It is provided with interior ring recess shoulder 22.And, ring placing part 31 is matched somebody with somebody between outer ring recess shoulder 12 and interior ring recess shoulder 22, in outer ring 10 and interior
Post portion 32 is configured between the roller surface 11,21 of circle 20, ring portion 31 is connected with the radial center portion of the wall thickness in post portion 32.Additionally, being formed
The side from circumferential observation in the post portion 32 of pocket hole portion 33 is the round shape of any radius r.
Even if same with above-mentioned embodiment in the case where so constituting, by being set as satisfaction 2.5 × 10-3≤L/π
dm≤13×10-3And -3.5 × 10-3≤ (M-2N)/π dm ＜ 0, it becomes possible to obtain the effect same with above-mentioned embodiment.
Also, the sphere centre position (ball center Oi) of pocket hole portion 33 is from the axial centre of angular contact ball bearing 1 to axle
To (face side) skew.That is, from the end face 4 of the angular contact ball bearing 1 for being configured with the rear side of ring portion 31 (on the right side of in Figure 19), arrive
The axial distance of the sphere centre position of pocket hole portion 33 is X, from the end face of the angular contact ball bearing 1 of face side (left side in Figure 19)
5, to pocket hole portion 33 sphere centre position axial distance be Y when, be set as X ＞ Y.Thereby, it is possible to expand the angle of rear side
Axial space between the end face 4 of contact ball bearing 1 and the surface of ball 3.Thereby, it is possible to expand the axial dimension of ring portion 31,
Improve the annulus intensity of ring portion 31.
If additionally, the intensity of ring portion 31 has no problem, then as shown in figure 20, composition can also be the ball of pocket hole portion 33
(ball center Oi) is consistent with the axial centre of angular contact ball bearing 1 for face center.In this case, the direction of principal axis distance
The relation of X and Y is X=Y.
(the 6th embodiment)
As shown in figure 21, the most outer diameter part m1 of the sphere centre position of pocket hole portion 33 and ring portion 31 and innermost diameter portion m2
Radial direction centre position m can be radially consistent.In the example in the figures, the inner peripheral surface of outer ring 10 has：Compared with roller surface 11
In the outer ring recess shoulder 12 of axially inner side (load-side) projection；It is recessed in axially external (anti-load-side) compared with roller surface 11
Outer ring seal groove 15.The outer peripheral face of inner ring 20 has：In the interior ring recess shoulder 22 of axially inner side projection compared with roller surface 21；With
Roller surface 21 is compared in axially external recessed inner ring seal groove 25.And, outer ring recess shoulder 12 and interior ring recess shoulder 22 it
Between match somebody with somebody ring placing part 31, post portion 32, ring portion 31 and the wall thickness in post portion 32 are configured between the roller surface 11,21 of outer ring 10 and inner ring 20
Radial center portion connects.Additionally, the side from circumferential observation for forming the post portion 32 of pocket hole portion 33 is the round shape of any radius r.
Also, seal groove 15 is fixed with seal member 50 in outer ring.The seal member 50 is across gap slightly and inner ring seal groove 25
It is opposed, prevent foreign matter to be mixed into Bearing inner.Additionally, seal member 50 is not limited to non-contact seals, or contact sealing.
So, for pocket hole portion 33, by matching somebody with somebody ring placing part 31 in axially inner side, in axially external configuration seal member 50,
So as to make angular contact ball bearing 1 compact.Such angular contact ball bearing 1 as shown in figure 21, back-to-back can be combined to make
With.
Even if same with above-mentioned embodiment in the case where so constituting, by being set as satisfaction 2.5 × 10-3≤L/π
dm≤13×10-3And -3.5 × 10-3≤ (M-2N)/π dm ＜ 0, can obtain the effect same with above-mentioned embodiment.
Additionally, in the present embodiment also in a same manner as in the fifth embodiment, the sphere centre position of pocket hole portion 33 is (in ball
Heart Oi) offset to axially external (face side) from the axial centre of angular contact ball bearing 1.That is, the relation quilt of axial distance X and Y
It is set as X ＞ Y.Thereby, it is possible to expand the end face 4 and ball of the angular contact ball bearing 1 of rear side (being axially inner side in Figure 21)
Axial space between 3 surface.Thereby, it is possible to expand the axial dimension of ring portion 31, the annulus intensity of ring portion 31 is improved.
If additionally, the intensity of ring portion 31 has no problem, then composition can also be the sphere centre position of pocket hole portion 33
(ball center Oi) is consistent with the axial centre of angular contact ball bearing 1.In this case, the relation of axial distance X and Y is X=
Y。
(embodiment 1 and 2)
Next, making (M-2N)/π dm change as shown in table 1, hat is manufactured with the injection mo(u)lding of axial tension mode
Type retainer 30, so as to test the faulted condition of a pair of claws 36 in post portion 32.Additionally, in embodiment 1 and 2 and ratio
In compared with example 1, parameter beyond (M-2N)/π dm is as follows for identical.
Bearing bore diameter：Bearing outside diameter：Ball pitch diameter dm：Ball diameter Dw：
10.319mm, ball number Z：21, contact angle α：60 °, crown type retainer material：Polyamide (mixes the glass of 20wt.%
Fiber-reinforced material), L/ π dm：3.6×10-3
[table 1]
| (M-2N)/πdm | The damage of claw could | Detailed condition | |
| Embodiment 1 | -0.7×10-3 | ◎ | Have no problem |
| Embodiment 2 | -3.4×10-3 | ○ | (slightly it is plastically deformed) without function problem |
| Comparative example | -3.6×10-3 | × | Can not use (claw end cracks) |
As (M-2N)/π dm increase, bigger load is applied to claw 36, especially -3.5 × 10-3＞ (M-2N)/π dm
Comparative example in, can crack in claw 36.This is because when mould is extracted reluctantly, in the end opposed pairs of post portion 32
The reason for compression interference is produced between claw 36.From this result, preferably circumferencial direction minimum wall thickness (MINI W.) M, the pawl in post portion 32
Circumferential width N in portion 36 and the relation of ball pitch circumference degree π dm meet -3.5 × 10-3≤ (M-2N)/π dm ＜ 0.
Next, each embodiment that the multiple parameters of angular contact ball bearing 1 are changed in explanation.
(embodiment 3)
In the present embodiment, the bearing bore diameter in the angular contact ball bearing 1 of the 1st embodiment is set as into Φ 30mm, axle
Hold external diameter and be set as Φ 62mm, L/ π dm=5.0 × 10-3, (M-2N)/π dm=-1.4 × 10-3。
By so setting each parameter, so as to confirm to obtain the effect same with above-mentioned embodiment.
(embodiment 4)
In the present embodiment, the bearing bore diameter in the angular contact ball bearing 1 of the 2nd embodiment is set as into Φ 20mm, axle
Hold external diameter and be set as Φ 47mm, L/ π dm=11.4 × 10-3, (M-2N)/π dm=-3.0 × 10-3。
By so setting each parameter,
So as to confirm to obtain the effect same with above-mentioned embodiment.
(embodiment 5)
In the present embodiment, the bearing bore diameter in the angular contact ball bearing 1 of the 3rd and the 4th embodiment is set as into Φ
50mm, bearing outside diameter is set as Φ 100mm, L/ π dm=3.5 × 10-3, (M-2N)/π dm=-0.7 × 10-3。
By so setting each parameter, so as to confirm to obtain the effect same with above-mentioned embodiment.
(embodiment 6)
In the present embodiment, the bearing bore diameter in the angular contact ball bearing 1 of the 5th embodiment is set as into Φ 20mm, axle
Hold external diameter and be set as Φ 47mm, L/ π dm=11.4 × 10-3, (M-2N)/π dm=-3.0 × 10-3。
By so setting each parameter, so as to confirm to obtain the effect same with above-mentioned embodiment.
(embodiment 7)
In the present embodiment, the bearing bore diameter in the angular contact ball bearing 1 of the 6th embodiment is set as into Φ 130mm, axle
Hold external diameter and be set as Φ 165mm, L/ π dm=2.7 × 10-3, (M-2N)/π dm=-0.6 × 10-3。
By so setting each parameter, so as to confirm to obtain the effect same with above-mentioned embodiment.
In addition, the invention is not restricted to above-mentioned embodiment, can suitably be changed, be improved.
The application is based on Japanese patent application 2014-136858 filed in 2 days July in 2014 and the Shen of on June 10th, 2015
Japanese patent application 2015-117336 please, its content is expressly incorporated herein as reference.
Claims (4)
1. a kind of crown type retainer, including：
Substantially circular ring portion；
Multiple post portions, from the face side or rear side of the ring portion at a predetermined interval to axially projecting；
Multiple pocket hole portions, form between the adjacent post portion, can respectively keep ball；
The crown type retainer is manufactured and for ball bearing by injection mo(u)lding, wherein,
The circumferentially intermediate of end in the post portion is provided with cut portion, so as to form a pair of claws in circumferential both sides,
The mutual ball pitch circumference degree π dm that pi is multiplied by apart from L and ball pitch diameter dm of the adjacent ball
Relation, meet：
2.5×10-3≤L/πdm≤13×10-3,
The circumferencial direction minimum wall thickness (MINI W.) M in the post portion, circumferential width N of the claw and the ball pitch circumference degree π
The relation of dm, meets：
-3.5×10-3≤ (M-2N)/π dm ＜ 0.
2. crown type retainer as claimed in claim 1,
The sphere centre position of the pocket hole portion and the radial center position in the most outer diameter part of the ring portion and innermost diameter portion, in footpath
To staggering.
3. crown type retainer as claimed in claim 1,
The sphere centre position of the pocket hole portion and the radial center position in the most outer diameter part of the ring portion and innermost diameter portion,
It is radially consistent.
4. a kind of angular contact ball bearing,
Including claims 1 to 3 any one described in crown type retainer.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-136858 | 2014-07-02 | ||
| JP2014136858 | 2014-07-02 | ||
| JP2015117336A JP2016027279A (en) | 2014-07-02 | 2015-06-10 | Crown retainer and angular contact ball bearing |
| JP2015-117336 | 2015-06-10 | ||
| PCT/JP2015/068590 WO2016002681A1 (en) | 2014-07-02 | 2015-06-26 | Crown cage and angular contact ball bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106662152A true CN106662152A (en) | 2017-05-10 |
Family
ID=55019217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580036047.6A Pending CN106662152A (en) | 2014-07-02 | 2015-06-26 | Crown cage and angular contact ball bearing |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2016027279A (en) |
| KR (1) | KR20170015372A (en) |
| CN (1) | CN106662152A (en) |
| TW (1) | TWI568943B (en) |
| WO (1) | WO2016002681A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111656032A (en) * | 2018-01-26 | 2020-09-11 | 日本精工株式会社 | Angular contact ball bearing |
| CN113294441A (en) * | 2021-05-10 | 2021-08-24 | 洛阳轴承研究所有限公司 | Injection molding retainer and bearing using same |
| US20220112918A1 (en) * | 2020-10-10 | 2022-04-14 | SKF (China) Co Ltd | Bearing cage and applications thereof |
| CN115210481A (en) * | 2020-03-03 | 2022-10-18 | 日本精工株式会社 | Crown type retainer for ball bearing and ball bearing |
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| CN1379193A (en) * | 2001-03-29 | 2002-11-13 | 光洋精工株式会社 | Bearing holder and antifriction bearing having said bearing holder |
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| CN1461897A (en) * | 2002-05-30 | 2003-12-17 | 美蓓亚株式会社 | Cage with rotation symmetrical depression |
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| SE7810946L (en) * | 1978-10-20 | 1980-04-21 | Draco Ab | METHOD OF TREATING CHRONIC OBSTRUCTIVE AIR DISEASE |
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| US5575570A (en) * | 1994-07-08 | 1996-11-19 | Nsk Ltd. | Cage for rolling bearing |
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| JP2006017180A (en) * | 2004-06-30 | 2006-01-19 | Koyo Seiko Co Ltd | Crown retainer made of synthetic resin |
| DE102007061589B4 (en) * | 2007-01-29 | 2017-06-22 | Nsk Ltd. | Ball bearing and mounting structure |
| JP2014066346A (en) * | 2012-09-27 | 2014-04-17 | Nsk Ltd | Ball bearing cage, and ball bearing |
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- 2015-06-10 JP JP2015117336A patent/JP2016027279A/en active Pending
- 2015-06-26 WO PCT/JP2015/068590 patent/WO2016002681A1/en active Application Filing
- 2015-06-26 KR KR1020167036852A patent/KR20170015372A/en not_active Application Discontinuation
- 2015-06-26 CN CN201580036047.6A patent/CN106662152A/en active Pending
- 2015-07-02 TW TW104121539A patent/TWI568943B/en not_active IP Right Cessation
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| JPS5557517U (en) * | 1978-10-16 | 1980-04-18 | ||
| CN1379193A (en) * | 2001-03-29 | 2002-11-13 | 光洋精工株式会社 | Bearing holder and antifriction bearing having said bearing holder |
| CN1451892A (en) * | 2002-04-18 | 2003-10-29 | 美蓓亚株式会社 | Radial ball bearing cage |
| CN1461897A (en) * | 2002-05-30 | 2003-12-17 | 美蓓亚株式会社 | Cage with rotation symmetrical depression |
| US20080159676A1 (en) * | 2004-12-07 | 2008-07-03 | Jtekt Corporation | Ball Bearing Retainer, And Ball Bearing Employing The Same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111656032A (en) * | 2018-01-26 | 2020-09-11 | 日本精工株式会社 | Angular contact ball bearing |
| CN111656032B (en) * | 2018-01-26 | 2022-04-05 | 日本精工株式会社 | Angular contact ball bearing |
| CN115210481A (en) * | 2020-03-03 | 2022-10-18 | 日本精工株式会社 | Crown type retainer for ball bearing and ball bearing |
| US20220112918A1 (en) * | 2020-10-10 | 2022-04-14 | SKF (China) Co Ltd | Bearing cage and applications thereof |
| CN113294441A (en) * | 2021-05-10 | 2021-08-24 | 洛阳轴承研究所有限公司 | Injection molding retainer and bearing using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016027279A (en) | 2016-02-18 |
| WO2016002681A1 (en) | 2016-01-07 |
| TWI568943B (en) | 2017-02-01 |
| TW201608143A (en) | 2016-03-01 |
| KR20170015372A (en) | 2017-02-08 |
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