CN104314972B - A kind of rolling bearing - Google Patents

Abstract

A kind of rolling bearing, including outer ring (1), inner ring (2), multiple rolling element (3) and retainer (4), outer ring (1) outer peripheral face is provided with one or more annular groove (7) along the circumferential direction, groove (7) is built with the O (6) outwardly from outer ring (1) outer peripheral face, O (6) cross section is circular, the inner bottom surface two ends of groove (7) are bottom land fillet, and the internal diameter tension ratio of O (6) isThe area filling rate of O (6) isThe conquassation rate of O (6) isX, y and z meet 1.3%≤x≤5%, 50%≤y < 100%, 21%≤z≤30%.It is easily installed, and outer ring (1) can be reliably prevented wriggles.

Description

A kind of rolling bearing

Technical field

The present invention relates to a kind of bearing, a kind of rolling bearing, it is adaptable to the anticreep rolling of band O Dynamic bearing device, belongs to bearing design technology field.

Background technology

Rolling bearing is a kind of precision mechanical components connecting the axle and the bearing block that rotate, and it includes outer ring, inner ring, multiple Rolling element and retainer, outer ring inner peripheral surface is provided with outer ring raceway, and inner ring outer peripheral face is provided with inner ring raceway.When installing and using, Axle is installed in inner ring endoporus, and inner ring matches to merge with axle and rotates together with the axis；Outer ring outer peripheral face is installed in inner hole of bearing seat.

In use occasions such as general motor, industrial sewing machine, electric tool, servomotors, rolling bearing often bears not Balance rotating load or vibration；Then, can occur between outer ring outer peripheral face and inner hole of bearing seat slowly macroface to slip, custom Claim to wriggle.Wriggling and once occur, will there is violent abrasion and temperature rise in outer ring outer peripheral face, and the abrasive particle that abrasion is formed can enter rolling Bearing inner, causes impression at rolling element and outer ring raceway, rolling element and inner ring raceway contact site, makes bearing noise raise； Meanwhile, temperature rise and abrasive particle also can accelerate grease and occur aging, shortens bearing life.In addition, even if bearing outer ring does not occur compacted Dynamic, the relative slip that amplitude is small also can occur between outer ring outer peripheral face and inner hole of bearing seat, make outer ring outer peripheral face and bearing block Bore area generation fretting wear, can shorten bearing life equally.

Chinese invention patent application publication No.: CN102562824A, Shen Qing Publication day: on July 11st, 2012, entitled In the application for a patent for invention of " anticreep bearing ", disclose a kind of anticreep bearing, including outer ring, inner ring, steel ball, retainer and Dust cap, described outer ring is provided with locking groove, and O is placed in locking groove, bearing connecting shaft bearing.This bearing arrangement is simple, energy Enough utilize O from the outside bulge quantity of bearing outer ring outer peripheral face, be stretched between outer ring outer peripheral face and inner hole of bearing seat, prevent Bearing outer ring is wriggled；But, this application for a patent for invention does not provide specific design scheme to O and groove, therefore Bearing outer ring can not be solved wriggle, be difficult to problems such as assembling, O is fragile at all.

Summary of the invention

Present invention aims to existing anticreep bearing be susceptible to wriggle, be difficult to assembling, O fragile Etc. problem, it is provided that a kind of rolling bearing.

For achieving the above object, the technical solution of the present invention is: a kind of rolling bearing, including outer ring, inner ring, multiple Rolling element and retainer, described outer ring outer peripheral face is provided with one or more annular groove along the circumferential direction, in described groove Equipped with the O outwardly from outer ring outer peripheral face, described O cross section is circular, and the inner bottom surface two ends of groove are Bottom land fillet, the diameter D of described groove₁Internal diameter D with O₂The internal diameter D of difference and O₂Ratio formed O internal diameter Tension ratio x, the sectional area of OSectional area with grooveRatio formed O The area filling rate y of shape circle, O forms O shape from the ratio of outwardly amount Δ d and the O diameter of section d of outer ring outer peripheral face Conquassation rate z of circle, i.e. $x=\left(\frac{D_1-D_2}{D_2}\right),y=\frac{\mathrm{\&pi;}{\left(\frac{d}{2}\right)}^2}{h\&times;\left(\frac{D-D_1}{2}\right)-(r^2-\frac{1}{4}\mathrm{\&pi;}{r}^2)\&times;2},z=\left(\frac{\mathrm{\&Delta;d}}{d}\right),$ Described x, y and z Meet following formula: 1.3%≤x≤5%；50%≤y < 100%；21%≤z≤30%, wherein, h is the width of groove, and D is outer ring External diameter, r is the bottom land radius of corner of groove,

Described x meets: 2%≤x≤4%.

Described x meets: x=3%.

Described y meets: 70%≤y≤90%.

Described z meets: 21%≤z≤27%.

Described O is made by nitrile rubber, acrylate rubber, silicone rubber, fluorubber or engineering plastics, O The Shao Er durometer method A scale hardness of shape circle is 65～74 degree.

The Shao Er durometer method A scale hardness of described O is 70 degree.

Two end faces of described rolling bearing are open type.

One or two end faces of described rolling bearing are provided with sealing member.

The material of described sealing member is metal material, or the material of sealing member is metal material and nitrile rubber, propylene The conjugate of any one rubber in acid esters rubber, silicone rubber, fluorubber.

Compared with prior art, the invention has the beneficial effects as follows:

The present invention sets the design load scope of the internal diameter tension ratio of O, area filling rate and conquassation rate, it is ensured that The anti-creep performance of outer ring, it is possible to the outer ring being reliably prevented rolling bearing occurs to wriggle and fretting wear；And can be easy Ground, be pressed into inner hole of bearing seat safely, improve efficiency of assembling, it is easy to install；O will not be damaged when installing simultaneously, from And reduce cost.

Accompanying drawing explanation

Fig. 1 is the installation diagram of rolling bearing in the present invention.

Fig. 2 is the schematic cross-section of rolling bearing in the present invention.

Fig. 3 is the schematic cross-section of O in the present invention.

Fig. 4 is the enlarged drawing in A portion in Fig. 2.

In figure, outer ring 1, inner ring 2, rolling element 3, retainer 4, sealing member 5, O 6, groove 7, axle 8, bearing block 9, outward Circle raceway 11, inner ring raceway 22.

Detailed description of the invention

Illustrate that the present invention is described in further detail with detailed description of the invention below in conjunction with accompanying drawing.

Seeing Fig. 2-Fig. 4, a kind of rolling bearing, including outer ring 1, inner ring 2, multiple rolling element 3 and retainer 4.Described Outer ring 1 inner peripheral surface is provided with outer ring raceway 11, and outer ring 1 outer peripheral face is provided with one or more annular groove 7 along the circumferential direction, Described groove 7 built with the O 6 outwardly from outer ring 1 outer peripheral face, herein multiple for two or more；Institute O 6 cross section stated is circle, and the inner bottom surface two ends of groove 7 are bottom land fillet.Described inner ring 2 outer peripheral face is provided with Inner ring raceway 22, described multiple rolling elements 3 roll between outer ring raceway 11 and inner ring raceway 22, and described retainer 4 will Rolling element 3 keeps at regular intervals at circumferencial direction.

Seeing Fig. 1, when rolling bearing is installed and used, axle 8 is installed in inner ring 2 endoporus, inner ring 2 match with axle 8 merge with Axle 8 rotates together, and axle 8 and inner ring 2 endoporus are usually interference fit.Outer ring 1 outer peripheral face is installed in bearing block 9 endoporus, outer ring 1 Matching with bearing block 9, play a supportive role, outer ring 1 outer peripheral face and bearing block 9 endoporus are usually matched in clearance or interference fits, Outer ring 2 is static.Rolling element 3 is evenly distributed between inner ring 2 and outer ring 1 by means of retainer 4, prevents rolling element 3 phase mutual connection Touch；Meanwhile, rolling element 3 guides retainer 4 to rotate.Described O 6 be stretched in the groove 7 of outer ring 1 and bearing block 9 endoporus it Between, prevent outer ring 1 from wriggling.

See Fig. 2-Fig. 4, the diameter D of described groove 7₁Internal diameter D with O 6₂The internal diameter D of difference and O 6₂Ratio Form internal diameter tension ratio x of O 6, the sectional area of O 6Sectional area with groove 7Ratio formed O 6 area filling rate y, O 6 from periphery, outer ring 1 towards The ratio of the amount Δ d and O 6 diameter of section d of outer protrusion forms conquassation rate z of O 6, i.e. $y=\frac{\mathrm{\&pi;}{\left(\frac{d}{2}\right)}^2}{h\&times;\left(\frac{D-D_1}{2}\right)-(r^2-\frac{1}{4}\mathrm{\&pi;}{r}^2)\&times;2},z=\left(\frac{\mathrm{\&Delta;d}}{d}\right);$ Wherein, h is the width of groove 7, and D is the external diameter of outer ring 1, and r is recessed The bottom land radius of corner of groove 7,

Seeing Fig. 2-Fig. 4, if internal diameter tension ratio x being designed to too big, then O 6 will occur excessive elasticity in circumference Stretching, the actual cross-section diameter d of O 6 will reduce, and bulge quantity Δ d also will reduce, thus can reduce the anti-creep of outer ring 1 Energy；Whereas if be designed to the least by internal diameter tension ratio x, then the bulge quantity Δ d of O 6 will increase, and bearing will be difficult to assemble. In addition, if being designed to the least by area filling rate y, then tensile force is inadequate, it is impossible to is reliably prevented outer ring 1 and wriggles；Instead It, if being designed to by area filling rate y too big, then bearing will not only be difficult to assemble, and be easily damaged O.More enter one Step, if being designed to the least by conquassation rate z, then can not be effectively prevented outer ring 1 and wriggle；If conquassation rate z is designed to Too big, then during rolling bearing assembling, not only it is difficult to be pressed into by rolling bearing in bearing block 9 endoporus, and is easily damaged O 6. Accordingly, it would be desirable to O 6 and groove 7 are optimized design, heretofore described x, y and z meet following formula: 1.3%≤x≤ 5%, 50%≤y < 100%, 21%≤z≤30%, i.e. $50\%\&le;\left(\frac{\mathrm{\&pi;}{\left(\frac{d}{2}\right)}^2}{h\&times;\left(\frac{D-D_1}{2}\right)-(r^2-\frac{1}{4}\mathrm{\&pi;}{r}^2)\&times;2}\right)<100\%.$ $21\%\&le;\frac{\mathrm{\&Delta;d}}{d}\&le;30\%,$ Internal diameter tension ratio x, area are filled out Fill rate y and conquassation rate z is maintained at preferably in numerical range；So that outside rolling bearing can not only prevent safely and reliably Circle 1 generation is wriggled and fretting wear, and rolling bearing can be pressed into bearing block 9 endoporus easily, safely, improves dress Join efficiency.

See Fig. 2-Fig. 4, it is preferred that described x meets: 2%≤x≤4%, i.e.When O shape Circle 6 internal diameter tension ratio within the range time, bearing has more excellent anticreep performance, and easily assembles.It is further preferred that Described x meets: x=3%, i.e.Thus further determine that the optimum point of O 6 internal diameter tension ratio.

See Fig. 2-Fig. 4, it is preferred that described y meets: 70%≤y≤90%, i.e. $70\%\&le;\left(\frac{\mathrm{\&pi;}{\left(\frac{d}{2}\right)}^2}{h\&times;\left(\frac{D-D_1}{2}\right)-(r^2-\frac{1}{4}\mathrm{\&pi;}{r}^2)\&times;2}\right)\&le;90\%;$ When O 6 area filling rate within the range time, bearing There is more excellent anticreep performance, and easily assemble.

See Fig. 2-Fig. 4, it is preferred that described z meets: 21%≤z≤27%, i.e.Work as O The conquassation rate of 6 within the range time, bearing has more excellent anticreep performance, and easily assembles.

Seeing Fig. 3, selecting of described O 6 material is mainly determined by operating temperature when using.Basis in the present invention The various operational temperature conditions of rolling bearing can select O 6 by nitrile rubber, acrylate rubber, silicone rubber, fluorubber Or engineering plastics are made；This different materials good springiness, easily processing, easily buying, low cost, highly versatile.If O 6 Shao Er durometer method A scale hardness less than 65 degree, then O 6 hardness is low, yielding, is easily damaged O 6, no during assembling It is beneficial to improve anticreep performance, but easily installs；If hardness is higher than 74 degree, then the deformation high, difficult of O 6 hardness, can improve anti- Wriggling performance, but be difficult to install.Therefore, the Shao Er durometer method A scale hardness selecting O 6 is 65～74 degree.Test of many times Show, the Shao Er durometer method A scale hardness of O 6 be 70 degree the most suitable.

Two end faces of described rolling bearing can be in open type, and i.e. two end faces of rolling bearing are all without any sealing member Such as metal dust-proof cover, rubber seal etc., this kind of situation is applicable to working environment cleaning, the occasion of oil lubrication.

Seeing Fig. 1-Fig. 2, one or two end faces of described rolling bearing can be provided with sealing member 5, outside can preventing Boundary foreign body invades Bearing inner, the most anti-leak-stopping fat, extends bearing service life, and it is unclean that this kind of situation is applicable to working environment Only, the occasion of grease lubrication.

The material of described sealing member 5 is metal material, or the material of sealing member 5 be metal material with nitrile rubber, third The conjugate of any one rubber in olefin(e) acid ester rubber, silicone rubber, fluorubber.Sealing member 5 low cost that made by metal material, add Work is easy, but can only realize non-contacting seal, i.e. sealing member 5 and bearing inner race 2 physical contact, and anti-dust performance is typically, no Waterproof；Be combined, with rubber, the sealing member 5 made by metal material and can realize the rubber seal lip of contact seal, i.e. sealing member 5 Contacting with bearing inner race 2, dustproof and waterproof performance is good, but cost increases.

Seeing Fig. 1-Fig. 2, described retainer 4 is made of metal, or retainer 4 is by engineering plastics and glass fibre Mixture is made.

See table, this table selects the rolling bearing of several concrete models to be designed groove 7 and O 6:

Wherein, symbol implication is: ◎ is the best, zero good, × poor.

According to above design parameter, it is known that:

One, when internal diameter tension ratio x, area filling rate y and conquassation rate z with upper O-shape ring 6 is all at the numerical range of the application Time interior, the anticreep performance of bearing is optimal；Meanwhile, also the dispersion of anticreep for bearing performance is controlled in minimum.Warp after trial-production Installing in a large number test, outer ring 1 is easily installed, and does not occur to wriggle and fretting wear, it is ensured that the use longevity of this rolling bearing Life.

Two, when internal diameter tension ratio x, area filling rate y or conquassation rate z with upper O-shape ring 6 be not at the numerical range of the application Time interior, through test of installing in a large number after trial-production, the anticreep performance of bearing or easily assembling be poor or anticreep performance and easily filling Joining property is the most poor, causes bearing outer ring 1 to be wriggled, is difficult to problems such as assembling, O is fragile.

Above content is to combine concrete preferred implementation further description made for the present invention, it is impossible to assert Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, On the premise of present inventive concept, it is also possible to make some simple deduction or replace, said structure all should be considered as belonging to Protection scope of the present invention.

Claims (10)

1. a rolling bearing, including outer ring (1), inner ring (2), multiple rolling element (3) and retainer (4), described outer ring (1) outward Side face is provided with one or more annular groove (7) along the circumferential direction, and described groove (7) is built with from outer ring (1) outer peripheral face Outwardly O (6), described O (6) cross section is circular, and the inner bottom surface two ends of groove (7) are bottom land circle Angle, it is characterised in that:

The diameter D of described groove (7)₁Internal diameter D with O (6)₂The internal diameter D of difference and O (6)₂Ratio formed O (6) internal diameter tension ratio x, the sectional area of O (6)Sectional area with groove (7)Ratio formed O (6) area filling rate y, O (6) is from outer ring (1) outward The ratio of amount Δ d and O (6) the diameter of section d that side face is outwardly forms conquassation rate z of O (6), i.e. $x=\left(\frac{D_1-D_2}{D_2}\right),y=\frac{\mathrm{\&pi;}{\left(\frac{d}{2}\right)}^2}{h\&times;\left(\frac{D-D_1}{2}\right)-(r^2-\frac{1}{4}\mathrm{\&pi;}{r}^2)\&times;2},z=\left(\frac{\mathrm{\&Delta;d}}{d}\right),$ Described x, y and z meets following formula:

1.3%≤x≤5%；50%≤y ＜ 100%；21%≤z≤30%, wherein, h is the width of groove (7), and D is outer ring (1) external diameter, r is the bottom land radius of corner of groove (7),

A kind of rolling bearing the most according to claim 1, it is characterised in that: described x meets: 2%≤x≤4%.

A kind of rolling bearing the most according to claim 2, it is characterised in that: described x meets: x=3%.

A kind of rolling bearing the most according to claim 1, it is characterised in that: described y meets: 70%≤y≤90%.

A kind of rolling bearing the most according to claim 1, it is characterised in that: described z meets: 21%≤z≤27%.

A kind of rolling bearing the most according to claim 1, it is characterised in that: described O (6) by nitrile rubber, third Olefin(e) acid ester rubber, silicone rubber, fluorubber or engineering plastics are made, and the Shao Er durometer method A scale hardness of O (6) is 65～74 degree.

A kind of rolling bearing the most according to claim 6, it is characterised in that: Shao Er durometer method A of described O (6) Scale hardness is 70 degree.

A kind of rolling bearing the most according to claim 1, it is characterised in that: two end faces of described rolling bearing are in opening Formula.

A kind of rolling bearing the most according to claim 1, it is characterised in that: one or two ends of described rolling bearing Face is provided with sealing member (5).

A kind of rolling bearing the most according to claim 9, it is characterised in that: the material of described sealing member (5) is metal material Expect, or the material of sealing member (5) is any one in metal material and nitrile rubber, acrylate rubber, silicone rubber, fluorubber The conjugate of rubber.