CN203585071U - Ball bearing - Google Patents
Ball bearing Download PDFInfo
- Publication number
- CN203585071U CN203585071U CN201320686353.2U CN201320686353U CN203585071U CN 203585071 U CN203585071 U CN 203585071U CN 201320686353 U CN201320686353 U CN 201320686353U CN 203585071 U CN203585071 U CN 203585071U
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- China
- Prior art keywords
- bearing
- ball
- ring groove
- inner ring
- ball bearing
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Abstract
The utility model discloses a ball bearing. The ball bearing comprises an outer ring, an inner ring and a plurality of balls, wherein the outer ring comprises an outer ring groove; the inner ring comprises an inner ring groove; the balls are arranged between the outer ring groove and the inner ring groove; the ratio of the radius of curvature of the inner ring groove to the diameters of the balls is 1.02; the ratio of the radius of curvature of the outer ring groove to the diameters of the balls is 1.06. By using the ball bearing, the rolling surfaces of the inner and outer rings of the bearing have the same fatigue life, thus effectively utilizing the bearing and prolonging the service life of the bearing.
Description
Technical field
The utility model relates to a kind of ball bearing.
Background technique
Bearing is for supporting and positioning rotating shaft, with the rotational motion of expecting, bearing generally can be divided into sliding bearing or rolling bearing, face contact movement is carried out in sliding bearing and rotating shaft, and rolling bearing and rotating shaft are put or line contact movement, generally speaking, because the area of contact of rolling bearing is little, admittedly there is more smooth movement effects.Rolling bearing is widely used between various accurate facility, to carry out highi degree of accuracy rotation.As shown in Figure 1, rolling bearing comprises the assemblies such as inner ring, outer ring, rolling element, retainer, and rolling element is arranged between outer shroud and interior ring, and locates to carry out roll rotational by retainer.Rolling bearing is generally categorized as ball bearing, needle bearing or roller bearing with rolling element pattern, with ball bearing, can insert appropriate lubricant body, it can be lubricant oil or lubricating grease, lubricant body is evenly coated rolling element surface to reduce surface friction drag, guarantees that rolling bearing runs well.
Under a period of time running, bearing enclose groove and ball are because repeating to bear contact stress, cause fatigue of materials and cause peeling off (Flaking) and causing using, general generally refer to the total winding number till bearing element face and rolling element are peeled off with bearing life, ball bearing is in operation process, as long as an assembly is peeled off situation one of in bearing enclose, bearing life calls off.Ball bearing is in operation process, and ball and Internal and external cycle groove respectively form an Elliptical Contacts area, and area of contact size is relevant with rolling surface curvature value, and area of contact can affect again contact stress.From pertinent literature, for deep groove ball bearing 6208, carry out emulation, such as analysis result shows when inner ring groove radius of curvature/ball diameter ratio is 1.024; Outer ring groove radius of curvature/diameter of the steel ball ratio was at 1.084 o'clock, now contact stress value difference is apart from reaching more than 20%, therefore inside and outside ring has to a certain degree difference fatigue life, and the life-span of bearing is depended on the assembly damaging at first, and steel ball quantity and steel ball size also can affect contact stress value in addition.
In order to make bearing enclose rolling surface identical fatigue life, therefore must make the contact stress of ball and Internal and external cycle groove suitable, therefore must for Internal and external cycle groove radius of curvature, design respectively, its object is the contact stress that will reach identical, can increase thus bearing time used.
Model utility content
The technical problems to be solved in the utility model is not identical fatigue life in order to overcome prior art bearing enclose rolling surface, can not the most effectively use the defect of bearing, and a kind of ball bearing is provided.
The utility model is to solve above-mentioned technical problem by following technical proposals:
A kind of ball bearing, comprise an outer ring, an inner ring and some balls, wherein, described outer ring comprises an outer ring groove, described inner ring comprises an inner ring groove, and described ball is arranged between described outer ring groove and described inner ring groove, and its feature is, the radius of curvature of described inner ring groove and the diameter ratio of described ball are 1.02, and the radius of curvature of described outer ring groove and the diameter ratio of described ball are 1.06.
Preferably, described ball bearing is deep groove ball bearing.
Preferably, the material of described ball bearing is high chromium carbon bearing steel.
In the utility model, above-mentioned optimum condition can combination in any on the basis that meets related domain general knowledge, obtains each preferred embodiment of the present utility model.
Positive progressive effect of the present utility model is: by use of the present utility model, make bearing enclose rolling surface identical fatigue life, effectively utilized bearing, increased the working life of bearing.
Accompanying drawing explanation
Fig. 1 is the ball bearing structure schematic diagram of the utility model preferred embodiment.
Embodiment
Enumerate preferred embodiment below, and carry out by reference to the accompanying drawings the clearer the utility model that intactly illustrates.
As shown in Figure 1, the ball bearing of the present embodiment comprises that an inner ring 1, an outer ring 2, a ball 3, outer ring 2 comprise an outer ring groove 21, and inner ring 1 comprises an inner ring groove 11.Wherein, ball 3 is the oval shade shown in figure with the area of contact of inner ring 1 and outer ring 2.
In the present embodiment, ball bearing is in operation process, ball must contact with interior ring rolling surface and outer shroud rolling surface, because the way of contact is resiliently deformable, also can be described as a hertz contact (Hertz Contact), surface of contact is an elliptical shape (as Fig. 1), and contact stress is a hertz contact stress.Bearing is in operation process, by ball 3, contacted with grooved surface repeatability, after one period of running time, grooved surface is peeled off because fatigue of materials causes causing, then fatigue of materials and cause peeling off, no matter be to occur in inner ring 1 or outer ring 2, as long as one of them assembly generating material is peeled off, bearing life calls off.
Take zanjon ball bearing 6203 as example, adopt after the structure of the present embodiment, its surface of contact pressure reaches identical 279Mpa.
Take zanjon ball bearing 6206 as example, if take high chromium carbon bearing steel as bearing raw material, the L10 of this Steel material is 6 times of 10 life-spans of theoretical L fatigue life, and 10 life-spans of theoretical L are 188.59 hours:
Theoretical L 10
hour
Wherein: n: spindle speed=2000rpm
C: substantially moving rated load=700Kgw
P: testing load=280Kgw
This Steel material dreamboat L10 fatigue life is 188.59 × 6=1131.54 hour.Adopt after the present embodiment, in bearing manufacture process, the diameter ratio of the radius of curvature of inner ring groove 11 and ball 3 is 1.02, and the diameter ratio of the radius of curvature of outer ring groove 21 and ball 3 is 1.06.Then 10, the bearing of the present embodiment is imported to bearing life testing machine checking, test bearing fatigue life, the L10 of result the present embodiment reaches 1587.06 hours fatigue life, and 10 fatigue lives of theoretical L are 188.59 hours, L10 relative theory fatigue life L10 ratio fatigue life of the present embodiment is 1587.06/188.59=8.4 times, better compared with 6 times of desired values (1131.54 hours).In sum, see through the adjustment of the present embodiment, be able to quite the fatigue life of Internal and external cycle, and then extend bearing working life, effectively reduce due to the replacing cost allowance that bearing caused.
Although more than described embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection domain of the present utility model is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present utility model and essence, can make various changes or modifications to these mode of executions, but these changes and modification all fall into protection domain of the present utility model.
Claims (3)
1. a ball bearing, comprise an outer ring, an inner ring and some balls, wherein, described outer ring comprises an outer ring groove, described inner ring comprises an inner ring groove, and described ball is arranged between described outer ring groove and described inner ring groove, it is characterized in that, the radius of curvature of described inner ring groove and the diameter ratio of described ball are 1.02, and the radius of curvature of described outer ring groove and the diameter ratio of described ball are 1.06.
2. ball bearing as claimed in claim 1, is characterized in that, described ball bearing is deep groove ball bearing.
3. ball bearing as claimed in claim 1 or 2, is characterized in that, the material of described ball bearing is high chromium carbon bearing steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320686353.2U CN203585071U (en) | 2013-10-31 | 2013-10-31 | Ball bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320686353.2U CN203585071U (en) | 2013-10-31 | 2013-10-31 | Ball bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203585071U true CN203585071U (en) | 2014-05-07 |
Family
ID=50583001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320686353.2U Expired - Fee Related CN203585071U (en) | 2013-10-31 | 2013-10-31 | Ball bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203585071U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111033082A (en) * | 2017-09-07 | 2020-04-17 | 谐波传动***有限公司 | Wave generator and wave gear device |
-
2013
- 2013-10-31 CN CN201320686353.2U patent/CN203585071U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111033082A (en) * | 2017-09-07 | 2020-04-17 | 谐波传动***有限公司 | Wave generator and wave gear device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20161031 |