CN206072111U - Rolling bearing - Google Patents

Abstract

Rolling bearing (100) includes：Outer ring (1)；Inner ring (6)；And the retainer (10) kept respectively to the multiple cylindrical rollers (9) being enclosed between outer ring (1) and inner ring (6) by the multiple pocket holes (14) being disposed at equal intervals used in circumferencial direction.Notch part (15) is formed with the inner peripheral surface of retainer (10).Using the radial dimension h of notch part (15), the internal diameter size D of outer ring (1)₁, retainer (10) outside dimension D₂, the pitch diameter dm of rolling bearing (100), quantity z of cylindrical roller (9), the outside dimension Da of cylindrical roller (9), the axial dimension L of cylindrical roller (9) 1.4≤α≤2.1 are met than α with the Bearing inner size that formula (1) is represented.

Description

Rolling bearing

Technical field

This utility model is related to rolling bearing.

Background technology

In rolling bearing, due to the caused rolling resistance of rotation institute of rolling element and raceway circle, the guide surface of retainer The stirring resistance of resistance to sliding, lubricating oil Deng on and heating can be produced.It is that Bearing inner is deposited by rolling element wherein to stir resistance Lubricating oil push open when the resistance that produces.Particularly in the rolling bearing for carrying out bath lubrication, due to the stirring of lubricating oil Resistance and produce the large percentage of heating.

In addition, on the other hand, lubricating oil also has cooling effect.Enter to exercise the rolling of the oil lubrication of lubricating oil forced circulation Bearing carries out heat exchange when the lubricating oil of supply is by Bearing inner so as to cooled.The effect of the cooling is logical according to lubricating oil The speed of oil when crossing Bearing inner, oil supply amount etc. and determine.Also, carry out the bearing of bath lubrication due to the lubricating oil that is detained with Heat exchange between bearing and be cooled.Flowing (circulate) of the effect of the cooling according to oil in Bearing inner, the amount of lubricating oil And determine.No matter which kind of lubricating method, cooling effect be all according to and heating balance and determine.

Herein, it is considered to the heating of the cylinder roller bearing of rib, so-called NU types is provided with the axial both ends of outer ring.By Lubricating oil is stored in into inside in the outer ring for being provided with rib, therefore lubricating oil must be pushed open when the rolling element of revolution passes through, stirred Resistance increases, and produces heating.Therefore, in the past, it is proposed that lubricating oil is not stored in into Bearing inner so that the method for heating decline (referring for example to patent documentation 1).

In the cylindrical roller bearing device shown in patent documentation 1, the axial direction two of the rotary parts such as retainer, raceway circle is made The radial dimension of end is different, and the communication path connected with oil storage portion is formed in bearing block.By the axle for making rotary part It is poor to have to the radial dimension at both ends such that it is able to using the size of centrifugal force by lubricating oil to axial conveying.Thus it is possible to Promote the heat exchange of bearing and lubricating oil using the axial circulation of lubricating oil, cooling effect can be expected.

Prior art literature

Patent documentation

Patent documentation 1：Japanese Unexamined Patent Publication 11-230178 publication

Utility model content

The problem solved by this utility model

However, the composition of patent documentation 1 has a problem that：As the construction of bearing block is complicated and scale is big, protect in addition The shape for holding the rotary parts such as frame, raceway circle is also complicated, therefore manufacturing cost rises, and assembleability declines in addition.

This utility model be in view of such problem and complete, its object is to provide one kind do not make in manufacturing cost Rise, improve the rolling bearing of cooling capacity.

For solution to problem

This utility model is to reach above-mentioned purpose to have following feature.

[1] a kind of rolling bearing, including outer ring, inner ring and retainer,

The retainer is interior with described to being enclosed in the outer ring used in multiple pocket holes that circumferencial direction is disposed at equal intervals Multiple rolling elements between circle are kept respectively, and the rolling bearing is characterised by,

Notch part is formed with the inner peripheral surface of the retainer,

Using the radial dimension h of the notch part, the internal diameter size D of the outer ring₁, the retainer outside dimension D₂、 Bearing pitch diameter dm, quantity z of the rolling element, the outside dimension Da of the rolling element, the axial dimension L of the rolling element 1.4≤α≤2.1 are met than α with the Bearing inner size that formula (1) is represented.

[formula 1]

[2] rolling bearing as described in [1], it is characterised in that use under oil lubrication.

[3] rolling bearing as described in [2], it is characterised in that the oil lubrication is from injection lubrication, oil-air lubrication, flies Select in foam lubrication, bath lubrication.

Utility model effect

According to this utility model, using the teaching of the invention it is possible to provide a kind of manufacturing cost is risen and is improved the rolling bearing of cooling capacity.

Description of the drawings

Fig. 1 is the sectional view of the rolling bearing involved by the 1st embodiment of the present utility model.

Fig. 2 is the side view of the rolling bearing of Fig. 1.

Fig. 3 is the axonometric chart of the retainer of the rolling bearing of Fig. 1.

Fig. 4 is the figure for illustrating circulation of the lubricating oil inside the rolling bearing of Fig. 1.

Fig. 5 is the figure for illustrating the mechanism of heating and cooling inside rolling bearing.

Fig. 6 is the figure for illustrating Bernoulli's theorem.

Fig. 7 is the figure of the construction of the test bearing that oil supply is circulated for explanation.

Fig. 8 is the chart for illustrating experimental result.

Fig. 9 is the chart for illustrating experimental result.

Figure 10 is the sectional view of the rolling bearing involved by the variation of the 1st embodiment of the present utility model.

Figure 11 is the axonometric chart of the retainer of the rolling bearing of Figure 10.

Figure 12 is the breach of retainer for illustrating in the rolling bearing involved by the 2nd embodiment of the present utility model The figure of the shape in portion.

Figure 13 is the axonometric chart of the retainer of the rolling bearing of Figure 12.

Figure 14 is the side view of the rolling bearing involved by the 3rd embodiment of the present utility model.

Figure 15 is the axonometric chart of the retainer of the rolling bearing of Figure 14.

Description of reference numerals

100、100’、200、300：Rolling bearing

1：Outer ring

6：Inner ring

9：Cylindrical roller (rolling element)

10、10’、210、310：Retainer

15、215、315：Notch part

z：The number of cylindrical roller

L：The length (axial dimension) of cylindrical roller

Da：The outside dimension of cylindrical roller

dm：Bearing pitch diameter

D₁：The internal diameter size of outer ring

D₂：The outside dimension of retainer

h：Resection (radial dimension of notch part)

Specific embodiment

(first embodiment)

Below, using accompanying drawing, illustrate the 1st embodiment of rolling bearing of the present utility model.Fig. 1 is of the present utility model The sectional view of the rolling bearing 100 involved by the 1st embodiment, Fig. 2 are the side views of rolling bearing 100, and Fig. 3 is rolling bearing The axonometric chart of 100 retainer 10, Fig. 4 are the figures for illustrating circulation of the lubricating oil inside rolling bearing 100.

Outer race track face 2 that rolling bearing 100 is formed on the inner peripheral surface of outer ring 1, and the outer peripheral face of inner ring 6 on formed Include multiple cylindrical rollers 9 (rolling element) between inner race track face 7.Rolling bearing 100 is formed at the axial both ends of outer ring 1 There is rib 3, commonly referred to as NU types cylinder roller bearing.Rolling bearing 100 is used under oil lubrication.

Retainer 10 has：In a pair of the annular portions 11,12 for axially configuring side by side；By a pair of annular portions 11,12 in axial direction Multiple pillars 13 of connection；And using a pair of annular portions 11,12 and pillar 13 by cylindrical roller 9 singly accommodate it is many Individual pocket hole 14.So, retainer 10 keeps multiple cylinder rollings respectively used in multiple pocket holes 14 that circumferencial direction is disposed at equal intervals Sub 9 (rolling elements).

The outer peripheral face of retainer 10 is being axially straight line.Notch part is formed with the inner peripheral surface of the pillar 13 of retainer 10 15.Notch part 15 is formed with square-section.

Describe the mechanism of the heating and cooling of the inside of such rolling bearing 100 with reference to Fig. 5,6 in detail.Such as Fig. 4 institutes Show, when lubricating oil flows into the inside of rolling bearing 100, lubricating oil accumulates in the notch part of the inner peripheral surface for being arranged at retainer 10 15.Due to the centrifugal force along with the rotation of retainer 10, the lubricating oil to accumulating in notch part 15 applies to be intended to pounding out of lubricant Pressure.The pressure and centrifugal force overcome the flow path resistance of the gap location between the pocket hole 14 of retainer 10 and cylindrical roller 9, from And lubricating oil is flowed in pocket hole 14.In pocket hole 14, heating is produced due to stirring resistance.

Also, due to above-mentioned pressure and centrifugal force, lubricating oil passes through pocket hole 14 and flows out to the outer peripheral face of retainer 10, Enclose orbital plane 2 further out to flow out.In outer ring orbital plane 2, also due to stirring resistance and producing heating.So, flow out The lubricating oil for accumulating therebetween is extruded by the lubricating oil of outer peripheral face, outer race track face 2 to retainer 10 in succession.The pressure overcomes The outer peripheral face and static circle of the retainer 10 of rotation are the flow path resistance of the gap location between the inner peripheral surface of outer ring 1, so as to lubricate Oil discharges (outflow) to Bearing outer.

So by the flowing of the lubricating oil of rolling bearing 100, hot friendship is carried out between rolling bearing 100 and lubricating oil Change, rolling bearing 100 is cooled down.In addition, the amount for accumulating in the lubricating oil in rolling bearing 100 to cooling down and can stir resistance Both power is acted on.Therefore, the influx of lubricating oil, the amount of the lubricating oil accumulated in rolling bearing 100 and lubrication Oil-out amount can significantly affect bearing temperature.So, in order to obtain fully reducing the effect of temperature, expect the inflow of lubricating oil Amount is balanced with discharge.

Herein, the gap between the inner peripheral surface (inner peripheral surface of rib 3) of the outer peripheral face of retainer 10 and outer ring 1 is used as adjustment The throttling element of the output of lubricating oil works.In addition, the size of the notch part 15 of retainer 10 can affect lubricating oil to rolling Influx in bearing 100.Therefore, in the present embodiment, not only notch part 15 is formed in the inner peripheral surface of retainer 10, and The outer peripheral face of the radial dimension (hereinafter also referred to resection), the inner peripheral surface of outer ring 1 and retainer 10 of appropriate setting notch part 15 Between gap size and by addition bearing various elements combination parameter, so as to promote bearing temperature to reduce.

First, if the influx of lubricating oil is Q_in, discharge is Q_out, it is considered to influx Q_inWith discharge Q_outEquilibrium Condition (Q_in=Q_out).Influx Q_inUsing centrifugal force caused by the flow velocity v of lubricating oil, inflow part sectional area A_inIt is as follows So represent.

[formula 2]

Q_in=A_in×v

The centrifugal force on the lubricating oil for lodging in notch part 15 is acted on by the pitch diameter dm for acting on rolling bearing 100 On centrifugal force represent.Centrifugal force caused by the flow velocity v of lubricating oil utilize energy type, the pitch circle using rolling bearing 100 is straight Footpath dm, the revolution speed ω of retainer 10, resection h of notch part 15, quality m of lubricating oil, are represented as follows.

[formula 3]

[formula 4]

In addition, the sectional area A of inflow part_inOutside dimension Da, the length (axle of cylindrical roller 9 of cylindrical roller 9 can be used To size) L, number z of cylindrical roller 9, represent as follows.

[formula 5]

A_in∝Da×L×z

Herein, when length L of cylindrical roller 9 is with length (axial dimension) Lp equal (L=Lp) in pocket hole 14, notch part 15 Sectional area S_in, resection h and cylindrical roller 9 length L meet following relations.

[formula 6]

Discharge Q_outBy between the outer peripheral face of retainer 10 and the inner peripheral surface of outer ring 1 gap institute caused by restriction effect, Rotate the caused resistance of institute and limit.So, discharge Q_outUsing the sectional area S of outflow portion_out, lubricating oil upper end (liquid level Highly) H (with reference to Fig. 6), oil extraction resistance R, coefficient B, are represented as follows.

[formula 7]

Q_out=(B × S_out×H)/R

In addition, the sectional area S of outflow portion_outInternal diameter (internal diameter of the rib 3) D of outer ring 1 can be used₁, retainer 10 it is outer Footpath D₂, and rolling bearing 100 pitch diameter dm, represent as follows.

[formula 8]

In addition, oil extraction resistance R can be represented as follows.

[formula 9]

Herein, as described above, in order to obtain sufficient temperature decreasing effect, needing influx Q_inWith discharge Q_outIt is equal And equilibrium (Q_in=Q_out), therefore the formula of the above can be such as following shown deformations.

[formula 10]

A_in× v=(B × S_out×H)/R

Above formula is represented with upper end H, as follows can be deformed.

[formula 11]

In the present embodiment, represent the dimensional effect of rolling bearing 100, by upper end H divided by rolling bearing 100 pitch circle Diameter dm, compares α using the value as Bearing inner size.

[formula 12]

(experiment)

Constructed using the test shown in Fig. 7, load rolling bearing 100 on axle S, implement rotation test.Rotation test is The Bearing inner size of change rolling bearing 100 is than α, and is carried out using 2 rotating speeds n, m.Fig. 8 is to illustrate that the rotation is tried The chart of the result tested, illustrates relation of the Bearing inner size than the temperature decreasing effect in α and rolling bearing 100.From Fig. 8 Understand, even if rotating speed is changed to n, m, when Bearing inner size meets 1.4≤α≤2.1 than α, obtain sufficient temperature drop Poorly efficient fruit.

In addition, in order to compare, having prepared notch part is not formed on retainer, not formed the conventional rolling bearing of taper (conventional specification)；Different rolling bearing (the taper of the radial dimension at the axial both ends of retainer as Patent Document 1 Specification), implement rotation test.Fig. 9 is the chart of the result for illustrating the rotation test.As can be seen from Figure 9, according in retainer 10 Inner peripheral surface form the rolling bearing that notch part 15 and Bearing inner size meet this specification of 1.4≤α≤2.1 than α, with Compare toward specification, the rolling bearing of taper specification, it is clear that obtain temperature decreasing effect.

So, the rolling bearing 100 according to present embodiment, as the inner peripheral surface in retainer 10 forms notch part 15, And Bearing inner size meets 1.4≤α≤2.1 than α, so as to lubricating oil is not detained in rolling bearing 100, therefore, it is possible to Manufacturing cost is increased, just obtain efficiency preferably cooling effect.Thus, even if using oil lubrication, particularly oil bath profit In the case of cunning, it may have the cooling capacity being equal to injection lubrication, sufficient temperature decreasing effect can be obtained.Also, roll Dynamic bearing 100 need not be sayed under injection lubrication certainly, in the case of use under oil-air lubrication, spittle lubrication, it is also possible to filled The temperature decreasing effect for dividing.

(variation)

Figure 10,11 illustrate that rolling bearing 100 ' and rolling bearing 100 ' involved by the variation of the 1st embodiment are made Retainer 10 '.In the retainer 10 ', also the notch part 15 with square-section is formed in inner peripheral surface.Also, protecting The outer peripheral face for holding the axial both ends of frame 10 ', i.e. annular portion 11,12 forms scarce with the ring-type that the rib 3 of outer ring 1 accordingly cuts off Oral area 16,17.Even if the outer peripheral face of retainer 10 ' is such shape, as long as Bearing inner size meets above-mentioned relation than α (1.4≤α≤2.1), it becomes possible to obtain temperature decreasing effect.

(second embodiment)

Next, the rolling bearing involved by the 2nd embodiment of the present utility model is illustrated with reference to Figure 12,13.For The part mark identical reference or suitable reference of or equivalent identical with the 1st embodiment, simplify or Omit the description.

As shown in Figure 12,13, in the rolling bearing 200 involved by the 2nd embodiment, in the pillar 213 of retainer 210 Inner peripheral surface be formed with notch part 215.Notch part 215 is different from the notch part 15 of the 1st embodiment, is formed with circular arc Section.

In notch part 215 is so formed in the way of with circular cross-section, if can be by its area of section S_inIt is real with the 1st Apply the sectional area S of the notch part 15 of mode_inEqually replace, then as long as Bearing inner size meets above-mentioned relation than α (1.4≤α≤2.1), it is believed that just can obtain temperature decreasing effect in a same manner as in the first embodiment.

Herein, if the sectional area of 1 notch part corresponding with 1 pocket hole is S_inWhen, summation Σ of the sectional area of notch part S_inUsing resection h of notch part 215, resection length (axial dimension) M (with reference to Figure 12) of notch part 215, cylindrical roller 9 Number (number in pocket hole) z, is represented as follows.

[formula 13]

ΣS_in=S_in× z=h × M × z

So, in order that the sectional area in the notch part of the inner peripheral surface formation of retainer is equivalent, resection h meets following formula i.e. Can.

[formula 14]

So, though in the case where notch part 215 is formed with circular cross-section, as long as by the sectional area of notch part Summation Σ S_inEqually replace, and Bearing inner size meets above-mentioned relation (1.4≤α≤2.1) than α, it becomes possible to obtain Sufficient temperature decreasing effect.

(the 3rd embodiment)

Next, the rolling bearing involved by the 2nd embodiment of the present utility model is illustrated with reference to Figure 14,15.For The part mark identical reference or suitable reference of or equivalent identical with the 1st embodiment, simplify or Omit the description.

As shown in Figure 14,15, in the rolling bearing 300 involved by the 3rd embodiment, in the annular portion of retainer 310 311st, 312 outer peripheral face, is formed with the recess 316 of arc-shaped at the position in axially proximate pocket hole 314.Therefore, in rolling bearing In 300, the outflow portion of removal of lubricant has inhomogenous section on circumference.

Herein, if outflow portion has a case that section homogeneous on circumference, then the sectional area S of outflow portion_outUse Internal diameter (internal diameter of the rib 3) D of outer ring 1₁, and retainer 310 outer diameter D₂, represent as follows.

[formula 15]

The section of outflow portion be circumference on it is inhomogenous in the case of, as the sectional area S of outflow portion_outIt is parameter, outer The internal diameter D of circle 1₁, retainer 310 outer diameter D₂Difference (D₁-D₂) as follows equally can replace.

[formula 16]

So, even if having on circumference in the case of inhomogenous section in outflow portion, as long as by the sectional area of outflow portion S_outEqually replace, and Bearing inner size meets above-mentioned relation than α, it becomes possible to obtain sufficient temperature decreasing effect.

Additionally, this utility model is not limited to above-mentioned embodiment, suitably deformation, improvement etc. can be carried out.Above-mentioned In embodiment, rolling bearing is cylinder roller bearing but it is also possible to be other rolling bearings.In addition, in the inner circumferential of retainer The cross sectional shape of the notch part that face is formed is not limited to illustrated by the rectangular shape illustrated by the 1st embodiment, the 2nd embodiment Circular arc, as long as can equally replace the sectional area of notch part, can be any shape.

In addition, in above-mentioned each embodiment, accordingly notch part is formed on pillar with all of pocket hole, but as long as Can be by the summation Σ S of the sectional area of notch part_inResection h is replaced with equally, it is also possible to only accordingly propped up with several pocket holes Notch part is formed on post.In addition, with regard to the recess that can be formed in the outer peripheral face of retainer, it is also possible to only with several pocket holes accordingly Form recess.

, based on Japanese patent application 2014-001139 filed in 7 days January in 2014, its content is used as with reference to simultaneously for the application Enter herein.

Claims (3)

1. a kind of rolling bearing, including outer ring, inner ring and retainer,

The retainer is interior with described to being enclosed in the outer ring respectively used in multiple pocket holes that circumferencial direction is disposed at equal intervals Multiple rolling elements between circle are kept, and the rolling bearing is characterised by,

Notch part is formed with the inner peripheral surface of the retainer,

Using the radial dimension h of the notch part, the internal diameter size D of the outer ring₁, the retainer outside dimension D₂, bearing Pitch diameter dm, quantity z of the rolling element, the outside dimension Da of the rolling element, the axial dimension L of the rolling element are with formula (1) the Bearing inner size for representing meets 1.4≤α≤2.1 than α,

[formula 1]

$\mathrm{\α}=\frac{z\·L\·Da}{dm\left(D_1-D_2\right)}\sqrt{\frac{h}{dm}}---\left(1\right).$

2. rolling bearing as claimed in claim 1, it is characterised in that

Use under oil lubrication.

3. rolling bearing as claimed in claim 2, it is characterised in that

The oil lubrication is selected from injection lubrication, oil-air lubrication, spittle lubrication, bath lubrication.