CN208749811U - Three point contact angular contact ball bearing - Google Patents
Three point contact angular contact ball bearing Download PDFInfo
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- CN208749811U CN208749811U CN201821167759.9U CN201821167759U CN208749811U CN 208749811 U CN208749811 U CN 208749811U CN 201821167759 U CN201821167759 U CN 201821167759U CN 208749811 U CN208749811 U CN 208749811U
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Abstract
The purpose of this utility model is to provide a kind of three point contact angular contact ball bearings for having taken into account load capacity and service life.In bearing (100), ball (106) and inner ring (104) two-point contact, ball (106) and (102) one point contact of outer ring.Bearing (100) makes ball (106) be connected to inner ring (104), inner ring (104) and the central axis of outer ring (102) is set to be aligned and move relative to one another, ball (106) is touched into outer ring (102), three points at this time are set as each contact point.In two contact points of inner ring (104), the contact angle (α L) of contact point (P1) is larger, and the contact angle (α s) of contact point (P2) is smaller.The contact point (P3) of outer ring (102) is formed as diagonal with contact point relative to the center line (L1) of the radial direction of ball.When inner radial gap is set as Δ Pd, the contact angle α o=cos-1 (1- Δ Pd/2/Ae) (radius of curvature-ball radius of Ae=orbital plane (110)) of contact point, inner radial clearance delta Pd is adjusted, so that each contact angle becomes the relationship of α s < α o < α L.
Description
Technical field
The utility model relates to a kind of three point contact angular contact ball bearings.
Background technique
Angular contact ball bearing be ball with keeping angle (contact angle) to a certain degree in radial directions relative to inner ring and
The bearing of outer ring contact.Angular contact ball bearing can support radial load and axial load simultaneously, further, since the quantity of ball is set
It is morely than general deep groove ball bearings fixed, therefore load capacity is larger, rigidity is also higher.
Become ball in the Multi-contact type that multiple points are in contact with inner ring and outer ring in angular contact ball bearing, the angular contact
The load capacity of ball bearing further increases.Such as the angle of four point-contact types and three point contact type is described in patent document 1
Contact ball bearing.In the technology of patent document 1, in inner ring side and outer ring side, each contact point is by the radial direction at the center of ball
The center line in direction is the position of the bias for the reciprocal side that boundary is set in axial direction.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2005-201294 bulletin
Utility model content
Utility model will solve the problems, such as
About the angular contact ball bearing of above-mentioned Multi-contact type, present inventors seek to take into account load capacity and
Service life and carried out sharp study, as a result, in the structure of four point contacts of patent document 1, it is higher there are load capacity but
The worry that calorific value becomes larger.The angle of the axis of rotation of ball and hollow shaft by inner ring and outer ring, contact point ball rotary friction
One of larger rail ring is wiped to determine.Also, in the rail ring of the lesser one of the spin friction of contact point, rotary friction
It wipes the friction for becoming bearing and occurs, cause to generate heat.Thus, it is possible to expect, the angular contact ball bearing of three point contact type is able to suppress
It is in contact with it a little less than the corresponding calorific value of amount of the contact point of four point-contact types, is advantageous on this point of service life.
But in patent document 1, on the books in paragraph 0016 about the ball bearing of three point contact type, but in addition to two
The orbital plane 4 of inner ring 3 of the orbital plane 2 of the outer ring 1 of point contact comprising arc surface 2a, arc surface 2b and a point contact is generally
Except content as arc surface, the necessary condition for setting up three point contact in desired position is not explained in detail.
In order to realize the bearing of three point contact in desired position, need to consider the diameter of ball, the radius of curvature of orbital plane and inside
The elements such as gap.
The utility model is in view of such project, and it is an object of the present invention to provide a kind of taken into account load capacity and connect at 3 points of the service life
Feeler contact ball bearing.
The solution to the problem
In order to solve the above problems, the representative configurations of the three point contact angular contact ball bearing of the utility model are, at this
In three point contact angular contact ball bearing, the orbital plane two-point contact of one of ball and inner ring or outer ring, the track of ball and another one
One point contact of face, which is characterized in that in the state of making ball be connected to the orbital plane of two-point contact, make the center of inner ring and outer ring
Simultaneously direction makes a relative move in the axial direction mutually for axis alignment, ball is touched to the orbital plane of a point contact, by three at this time
Point is set as each contact point, and lesser one in two contact angles of two-point contact side is set as contact angle α s, will be one of larger
It is set as contact angle α L, at this moment, the contact point of a point contact side and the contact point of contact angle α L are relative in the radial direction of ball
The heart is linear to become diagonal, when inner radial gap is set as Δ Pd, contact angle α o=cos-1 (the 1- Δ Pd/ of a point contact side
2/Ae) ... (numerical expression 1) (wherein, radius of curvature-ball radius of the orbital plane of the mono- point contact side Ae=), has adjusted inner radial
Clearance delta Pd, so that each contact angle becomes the relationship of α s < α o < α L.
According to above structure, load capacity and the three point contact angular contact ball bearing that the service life improves can be realized.Especially
Be by the way that the elements such as the radius of the radius of curvature of orbital plane, ball are substituted into numerical expression 1 and adjust inner radial gap, so as to
Higher reproducibility realizes the three point contact in desired position.
Be also possible to above-mentioned contact angle α s contact point and contact angle α L contact point across above-mentioned center line formed in
The opposite side of axial direction.According to this structure, load capacity and the three point contact angular contact ball axis that the service life improves be can be realized
It holds.
Being also possible to the three point contact angular contact ball bearing is ball and one point contact of inner ring two-point contact, ball and outer ring
Three point contact.It also can be realized load capacity and the three point contact angular contact ball bearing that the service life improves according to this structure.
It is also possible in the three point contact angular contact ball bearing, the rail ring of a point contact side is to drop the shoulder of side
Low counterbore shape.It can also be set as separating with the rail ring of two-point contact side according to this structure, it is further possible to pass through
Ball is put into from counterbore side more to set ball number.
The effect of utility model
According to the utility model, it is capable of providing a kind of three point contact angular contact ball axis for having taken into account load capacity and service life
It holds.
Detailed description of the invention
Fig. 1 (a) is the figure for indicating the summary of three point contact angular contact ball bearing of the embodiments of the present invention, Fig. 1
It (b) is the figure for indicating the summary of the contact angle of three point contact angular contact ball bearing of the embodiments of the present invention.
Fig. 2 is the figure for indicating the relationship in inner radial gap and contact angle.
Fig. 3 is the figure for indicating the result of life test of bearing.
Description of symbols
The center line of the radial direction of L1, ball；P1, inner ring side the biggish contact point of contact angle；The contact of P2, inner ring side
The lesser contact point in angle；P3, outer ring side contact point；100, bearing；102, outer ring；104, inner ring；106, ball；108, inner ring
Orbital plane；110, the orbital plane of outer ring；112, counterbore.
Specific embodiment
Explain the suitable embodiment of the utility model in detail referring to the attached drawing of addition.Such embodiment party
Size, material shown in formula and other specific numerical value etc. are intended merely to make the understandable illustration of utility model, in addition to spy
It does not mentionlet alone except bright situation, is not used to limit the utility model.In addition, in the present description and drawings, for substantially having
There are identical function, the element of structure to mark identical appended drawing reference, so that repeated explanation is omitted, in addition, omitting practical with this
The diagram or explanation of the novel element being not directly dependent upon.
Fig. 1 (a), Fig. 1 (b) are to indicate that the three point contact angular contact ball bearing 100 of the embodiments of the present invention is (following
Referred to as bearing 100) figure.Fig. 1 (a) is the figure for indicating the summary of bearing 100.The bearing 100 outer ring 102 and inner ring 104 it
Between have a column ball 106.In bearing 100, ball 106 relative to radial direction with keeping angle to a certain degree with inner ring 104
It is contacted with outer ring 102.It is especially set as in the present embodiment, orbital plane 108 two-point contact of the ball 106 relative to inner ring 104, phase
For 110 1 point contact of orbital plane of outer ring 102.
Inner ring 104, which is set as orbital plane 108 in a manner of orbital plane 108 and 106 two-point contact of ball, to be formed by two circular arcs
Top come to a point domes, so-called Gothic arched door shape.
Outer ring 102, which is set as orbital plane 110 in a manner of orbital plane 110 and 106 1 point contact of ball, to be formed by a circular arc
, so-called single R angular shape.In addition, outer ring 102, which becomes, makes to be formed the counterbore that the shoulder of the side of slot of orbital plane 110 reduces
Shape (counterbore 112).Bearing 100 becomes counterbore shape by outer ring 102, can separate outer ring 102 with inner ring 104, in addition,
Also the ball number between outer ring 102 and inner ring 104 can be set to more.
As long as in addition, the structure of bearing 100 inner ring 104 and outer ring 102 and 106 three point contact of ball, such as being set as
The structure of inner ring and 106 two-point contact of 106 1 point contact of ball, outer ring and ball also can be realized.In this case, by by inner ring
It is set as counterbore shape, inner ring and outer ring can be set as separating.
Fig. 1 (b) is the figure for indicating the summary of contact angle of bearing 100.The condition of contact angle as definition bearing 100,
Firstly, making ball 106 be connected to the orbital plane 108 of the inner ring 104 of two-point contact as shown in Fig. 1 (a).In this state, such as Fig. 1
(b) shown in, inner ring 104 and the central axis of outer ring 102 is directed at and direction makes a relative move in the axial direction mutually.Also, it will
Ball 106 touches the orbital plane 110 of the outer ring 102 of a point contact, and three points at this time are set as to each contact of present embodiment
Point (contact point P1, contact point P2, contact point P3).
In the present embodiment, in contact point P1, the contact point P2 for being formed in inner ring 104, by contact angle biggish one
Person, that is, contact point P1 is set as contact angle α L, and the lesser one of contact angle, that is, contact point P2 is set as contact angle α s.Such as Fig. 1 (b) institute
Show, contact point P1 forms contact angle α L relative to the center line L1 of the radial direction of ball 106.Contact point P2 is relative to center line L1
Form contact point α s.At this moment, contact angle α L is set greater than contact angle α s (α s < α L).
Contact point P3 is formed with becoming diagonal mode in the axial direction relative to center line L1 and contact point P1.Contact
Point P3 forms contact angle α o relative to center line L1.Contact angle α o is as described later, in order to improve the load energy of the bearing 100
Power is set in a manner of as the relationship of α s < α o < α L.
Contact point P1 and contact point P2 can also be relative to orthogonal with the center of ball 106 shown in dotted line in Fig. 1 (b)
Two lines are set in identical quadrant.But in the present embodiment, contact point P1 and contact point P2 is set to across center line L1
The two sides of axial direction.Specifically, contact point P2 is set to opposite with contact point P1 in the axial direction relative to center line L1
Side, and be side identical with a point contact side i.e. contact point P3 of outer ring 102.
In the present embodiment, the amount by adjusting inner radial gap makes above-mentioned three point contact point P1~P3 be formed in the phase
The position of prestige.As shown in Fig. 1 (b), in bearing 100, inner radial clearance delta Pd/2 is ensured between ball 106 and outer ring 102.
The unilateral section of cricoid bearing 100 is merely illustrated in Fig. 1 (b), therefore, utilizes the full dose (Δ for meaning inner radial gap
Pd the symbol Δ Pd/2 of half (1/2)) is indicated.
Fig. 2 is the figure for indicating the relationship of inner radial clearance delta Pd/2 and contact angle α o.In Fig. 2, by the center of ball 106
It is set as central point O, the center of curvature of the orbital plane 110 of the outer ring 102 before the movement that (b) illustrates referring to Fig.1 is indicated with Oe, and
The center of curvature of the orbital plane 110 of outer ring 102 after indicating mobile with Oe '.In addition, indicating the radius of ball 106, with Da/2 with re
Indicate the radius of curvature of the orbital plane 110 of outer ring 102.
The condition of contact angle α o is defined based on inner radial clearance delta Pd/2.When indicating contact angle α o with cos α o, energy
Enough it is expressed as,
Cos α o=(is counted from central point O to the distance of center of curvature Oe/distance ... from central point O to center of curvature Oe '
Formula 2).
In above-mentioned numerical expression 2, denominator " from central point O to the distance of center of curvature Oe ' " can be expressed as, from central point O
To distance=radius of curvature re- radius Da/2 ... (numerical expression 3) of center of curvature Oe '.
In addition, molecule " from central point O to the distance of center of curvature Oe " can be expressed as in above-mentioned numerical expression 2,
Distance=radius of curvature re- (radius Da/2+ inner radial clearance delta Pd/ from central point O to center of curvature Oe
2) ... (numerical expression 4).
When summarizing the right of above-mentioned numerical expression 3 with symbol Ae, the right of numerical expression 4 can be with Ae- inner radial clearance delta
Pd/2 is indicated.When summarizing numerical expression 2 based on this, numerical expression 2 can be expressed as, cos α o=(Ae- Δ Pd/2)/Ae ... (numerical expression
5)。
And it can be obtained from numerical expression 5
Contact angle α o=cos-1 (1- Δ Pd/2/Ae) ... (numerical expression 1).
In the present embodiment, inner radial clearance delta Pd is adjusted using above-mentioned numerical expression 1, so that each contact point becomes α s < α
The relationship of o < α L.If each contact angle is the relationship of α s < α o < α L, can make send out for radial load and axial load
The three point contact for waving higher load capacity is set up.On the contrary, for example contact angle α o be less than contact angle α s when, bearing it is opposite
It is remarkably decreased in the load capacity of axial load.In addition, ball 106 is easy to cross outer ring when contact angle α o is greater than contact angle α L
Shoulder, it is therefore possible to lead to not increase ball number, can not outer ring implement counterbore shape.By making above-mentioned each contact angle α s
The relationship of < α o < α L, the load capacity of the bearing 100 is higher, can be realized counterbore shape, and can increase ball number.
Fig. 3 is the figure for indicating the result of life test of bearing 100.If the bearing 100 of above-mentioned present embodiment, then
Not only load capacity is higher relative to both radial load and axial load, but also is able to extend the service life.
In 5 subjects of the total recorded in table, each contact angle α L of 4 subjects other than right end, α s,
The condition of α o is different.As middle section skeleton diagram expression as, subjects with from left to right and contact angle α o, α L become larger,
Contact angle α s becomes smaller.Wherein, 1~embodiment of embodiment 3 is equivalent to the pass that the contact angle in above embodiment is α s < α o < α L
The bearing 100 of system.The comparative example 2 of right end is equivalent to the angular contact ball bearing of 40 ° of contact angle of previous two-point contact.
The lower section of table describes each examination in the case where making the value of radial load and axial load change to operate
Test the service life (time (unit hrs) until there is fatigue) of object.Wherein, in comparative example 1, contact angle α o=0 °, phase
Higher for the value of radial load, on the other hand, the value relative to axial load is slightly lower.In addition, comparative example 2 is two-point contact,
Value relative to axial load is higher, but the value relative to radial load is lower.
For 1~embodiment of embodiment 3 compared with comparative example 1, contact angle α o is larger, correspondingly, compared with comparative example 1,
Value relative to axial load is significantly got higher.In addition, 1~embodiment of embodiment 3 is three point contact, therefore, in the nature of things,
Compared with comparative example 2, the value relative to radial load is higher.If also, being conceived to radial load and axial load both
The case where having loaded 300kgf then knows that the value of 1~embodiment of embodiment 3 is higher than the value of comparative example 1, comparative example 2.
When 1~embodiment of embodiment 3 is compared with one another, in embodiment 1, embodiment 2, the contact of contact angle α L
The contact point P2 of point P1 and contact angle α s are located at two sides across the center line L1 of ball 106, therefore, with contact point P1 and contact point P2
Embodiment 3 positioned at same quadrant is compared, and the value relative to radial load becomes slightly higher.
From these 1~embodiments of embodiment 3 it is found that in the bearing 100 of present embodiment, for radial load and axial direction
Load can play consistently load capacity.If also, being conceived to total 5 of each test body of lowermost and operating as phase
Etc. frequencies when service life, then obtain following result: the longest-lived of embodiment 1, be then successively embodiment 2 and embodiment 3
It lasts a long time.
As known from the above, according to the present embodiment, load capacity and the three point contact corner connection that the service life improves be can be realized
Touch ball bearing 100.Especially in the present embodiment, by by elements such as the radiuses of the radius of curvature of orbital plane 110, ball 106
It substitutes into numerical expression 1 above-mentioned and adjusts inner radial clearance delta Pd, can be realized with higher reproducibility in desired position
Three point contact.
In addition, inner ring can be also set as a point contact side by the three point contact angular contact ball bearing 100 as variation,
Outer ring is set as two-point contact side.The three point contact that load capacity and service life improve also can be suitably realized according to this structure
Angular contact ball bearing.
Above by reference to the Detailed description of the invention the utility model suitable embodiment of addition, but the utility model is not limited to
Such example, this is self-evident.Those skilled in the art it is clear that, in the range described in Patent right requirement,
It is conceivable that various modifications or fixed case, and it is clear that, it is practical new that these modifications or fixed case also would naturally fall within this
The technical scope of type.
Industrial availability
The utility model can be used in three point contact angular contact ball bearing.
Claims (5)
1. a kind of three point contact angular contact ball bearing, in the three point contact angular contact ball bearing, the one of ball and inner ring or outer ring
One point contact of orbital plane of the orbital plane two-point contact of person, ball and another one, the feature of the three point contact angular contact ball bearing exist
In,
In the state of making ball be connected to the orbital plane of two-point contact, the central axis of inner ring and outer ring is made to be directed at simultaneously mutually opposite axis
It is made a relative move to direction, ball is touched to the orbital plane of a point contact, three points at this time are set as each contact point,
Lesser one in two contact angles of the two-point contact side is set as contact angle α s, is set as contacting by one of larger
Angle α L, at this moment, the center of the contact point of the contact point of point contact side and contact angle α L relative to the radial direction of ball
It is linear to become diagonal,
When inner radial gap is set as Δ Pd,
The contact angle α o=cos-1 [1- (Δ Pd/2)/Ae] of one point contact side
Wherein, radius of curvature-ball radius of the orbital plane of the mono- point contact side Ae=,
The inner radial clearance delta Pd is had adjusted, so that each contact angle becomes the relationship of α s < α o < α L.
2. three point contact angular contact ball bearing according to claim 1, which is characterized in that
The contact point of the contact angle α s and the contact point of the contact angle α L are formed in axial direction across the center line
Opposite side.
3. three point contact angular contact ball bearing according to claim 1 or 2, which is characterized in that
Ball and the inner ring two-point contact, ball and one point contact of outer ring.
4. three point contact angular contact ball bearing according to claim 1 or 2, which is characterized in that
The rail ring of one point contact side is the counterbore shape for reducing the shoulder of side.
5. three point contact angular contact ball bearing according to claim 3, which is characterized in that
The rail ring of one point contact side is the counterbore shape for reducing the shoulder of side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821167759.9U CN208749811U (en) | 2018-07-23 | 2018-07-23 | Three point contact angular contact ball bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821167759.9U CN208749811U (en) | 2018-07-23 | 2018-07-23 | Three point contact angular contact ball bearing |
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| Publication Number | Publication Date |
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| CN208749811U true CN208749811U (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821167759.9U Active CN208749811U (en) | 2018-07-23 | 2018-07-23 | Three point contact angular contact ball bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110989129A (en) * | 2019-12-24 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Telescope primary mirror supporting mechanism |
| CN115087807A (en) * | 2019-12-16 | 2022-09-20 | 赛峰直升机发动机 | Three-point contact rolling bearing with improved discharge structure |
-
2018
- 2018-07-23 CN CN201821167759.9U patent/CN208749811U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115087807A (en) * | 2019-12-16 | 2022-09-20 | 赛峰直升机发动机 | Three-point contact rolling bearing with improved discharge structure |
| CN110989129A (en) * | 2019-12-24 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Telescope primary mirror supporting mechanism |
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