CN1447038A - Rolling bearing esp. for dynamo - Google Patents
Rolling bearing esp. for dynamo Download PDFInfo
- Publication number
- CN1447038A CN1447038A CN03107582A CN03107582A CN1447038A CN 1447038 A CN1447038 A CN 1447038A CN 03107582 A CN03107582 A CN 03107582A CN 03107582 A CN03107582 A CN 03107582A CN 1447038 A CN1447038 A CN 1447038A
- Authority
- CN
- China
- Prior art keywords
- outer ring
- bearing
- axle collar
- groove
- external diameter
- 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
Links
- 238000005096 rolling process Methods 0.000 title description 6
- 239000000463 material Substances 0.000 claims abstract description 11
- 229910001234 light alloy Inorganic materials 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001095 light aluminium alloy Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/07—Fixing them on the shaft or housing with interposition of an element
- F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
-
- 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
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- 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
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
-
- 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
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
- F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
-
- 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
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- 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
- F16C2202/00—Solid materials defined by their properties
- F16C2202/20—Thermal properties
- F16C2202/22—Coefficient of expansion
-
- 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
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
- Motor Or Generator Frames (AREA)
- Support Of The Bearing (AREA)
Abstract
A bearing assembly (21), comprises an outer race (24) adjusting in the cylindrical flute. The outer race (24) comprises a runner face in contact with several balls (26) etc., while at least one expansion compensating race (35) is located in an annular groove (33) in the cylindrical outer face of the outer race. The expansion compensating race is of material with a larger expansion coefficient than that of the outer race. The expansion compensating race has an outer diameter between the outer diameter of outer race, minus 50 microns, and the outer diameter of outer race, plus 20 microns.
Description
Technical field
The present invention relates to the rolling bearing field, in particular for such as in the motor.
Background technique
Motor generally comprises a housing, is wherein fixing stator and is being mounted to rotor rotated in stator.Motor is mounted to by means of two bearing rotations, and this bearing generally is the rigidity ball bearing, and they are positioned on each end of rotor shaft.
" rigid ball " profile shaft holds has the bearing race that cross section is a ring usually, and it is a symmetry with respect to the plane through ball center, and this bearing works to bigger radial load and moderate axial load.These two bearings are installed on the axle with press fit by means of their inner rings.
The outer ring of bearing is installed in the cylinder shape groove of electric machine casing, and housing generally is made of light aluminum alloy.One of them outer ring of two bearings is axially fixed in the electric machine casing as circlip and/or shoulder, and can selects to be installed in the described housing by clamping by proper device.
The outer ring of another bearing axially is mounted freely in the housing, that is to say, allows axial clearance.In fact, the temperature rising along with motor under the different expansion of each parts of motor, can change second bearing with the axial distance that the clutch shaft bearing of relative housing axial restraint separates slightly.Therefore second bearing must axially move slightly with respect to housing, and its outer ring can be with respect to described housing in time rotation improperly.
FR-A-2585095 discloses a kind of bearing, is equipped with the axle collar of synthetic resin on its outer ring, and this synthetic resin is dual molded in the mach annular groove of described outer ring periphery.These axle collars are radially outstanding with respect to the exterior cylindrical surfaces of bearing outer ring, and prevent that when motor temperature raises the outer ring from rotating with respect to the groove on the housing.
The expansion coefficient of the electric machine casing of being made by light alloy approximately is the twice of expansion coefficient of the steel of each circle of bearing.Therefore temperature rise has caused radially loosening between the groove of bearing outer ring and housing.This axle collar of being made by plastic materials has with respect to the remarkable big expansion coefficient of housing light alloy, because the internal friction of bearing is to preventing the unintentional rotation of outer ring with respect to groove.The axle collar has very large external diameter with respect to bearing outside diameter.
By this way, for example for the bearing of 32mm external diameter, for the bearing of identical nominal value, axle collar external diameter tolerance from+20 to+50 μ m, from+30 to+70 μ m just, yet the tolerance of bearing outer diameter from 0 to-10 μ m.The result is that the axle collar is with respect to bearing outer ring radial surface and for good and all outstanding.
Though this equipment is for preventing that the outer ring unintentional rotation from being that the people is satisfied very in addition, it also has certain defective.
Bearing Installation is needed to make its contraction in groove, and therefore must under pressure, carry out.Because the axle collar is arranged on the outer ring and with respect to the latter's outer surface and obviously radially gives prominence to, this just makes in shrinking the operation process of installing must emit the risk of damaging and pulling out the axle collar.The clamping bearing makes bearing can not have in the process of temperature change and moves axially enough degrees of freedom in groove.As a result, this bearing bears unusual axial load, particularly under low temperature and middle temperature.The life-span that above-mentioned unusual axial load has infringement property ground to reduce bearing bracket stand probably.
Summary of the invention
The present invention is proposed to have solved the problems referred to above.
The invention provides a kind of improved bearing with compensating collar.
According to an aspect of the present invention, bearing means comprises an outer ring that is intended to regulate in cylinder shape groove, a bearing race that is formed on the described outer ring, contact a scrolling series element of arranging with raceway, and at least one expansion compensation axle collar, this axle collar is installed in the annular narrow orifice (throat) that the exterior cylindrical surfaces by the outer ring forms, and the axle collar is formed by the expansion coefficient material bigger than the expansion coefficient of the material that constitutes the outer ring.Axle collar external diameter deducts 50 μ m and the outer ring external diameter adds between the 20 μ m between the outer ring external diameter.
Advantageously, the adjusting of carrying out between the external diameter of bearing outer ring and the groove of light alloy housing will be selected, and can suitably slide at ambient temperature.
In an embodiment of the present invention, between+10 and-50 μ m, especially, this tolerance can be between+10 and-30 μ m with respect to the tolerance of nominal diameter for the external diameter of the axle collar.
In one embodiment of the invention, the outer ring external diameter with respect to the tolerance of nominal diameter between 0 and-10 μ m.
This bearing preferably includes two compensating collars, and they are arranged in two narrow orifices on the outer ring, and described narrow orifice is axially separated.This bearing is symmetrical with respect to the radial plane through the rolling element center preferably.
Bearing can comprise an inner ring solid or that made by sheet material, and it is provided with and the contacted external bearings raceway of rolling element.
In one embodiment of the invention, inner ring is made by composite.Especially this inner ring can be made by polyamide.
Bearing can be fixed in the groove, and this groove is provided with cylindrical bore and forms mechanical part, as the part of the stator component of motor.Groove can be made by light alloy.
The present invention also provides a kind of motor, and it comprises that a housing, one are installed in stator in the housing, rotor and at least one bearing between housing and the rotor of being fixed on as above describing.
In one embodiment of the present of invention, housing is made by light alloy, particularly comprises the metal alloy of aluminium and/or magnesium.
In one embodiment of the invention, the thermal expansion coefficient of the axle collar is than the material that comprises bearing outer ring and comprise that the material coefficient of thermal expansion coefficient of groove of described outer ring is big.
In other words, the outer surface of the axle collar can radially be given prominence to 10 μ m with respect to the cylindrical outer surface of bearing outer ring, or with respect to the former indentation 25 μ m.Because the external diameter of bearing outer ring is from 0 to-10 μ m with respect to the tolerance of its nominal side, and the groove of light alloy is from 0 to+16 μ m with respect to the tolerance of its nominal side, the nominal side of its further groove is identical with the nominal side of the external diameter of bearing outer ring, because the axle collar is outstanding very little with respect to the maximum radial that the outer ring may reach, so bearing can be installed in its groove at an easy rate, and do not have the danger that damages the axle collar.
When low temperature, particularly be lower than or during near 0 °, between the groove of outside steel ring of bearing and housing light alloy, have bigger interference.This interference has guaranteed centering, and guarantees that bearing outer ring can not rotate in groove, and these public affairs are full of and also allow the outer ring reasonably can light axial moving in its groove under the thrust load simultaneously.
Otherwise when temperature raise, for example high during to 120 ℃, the interference between the axle collar and the groove guaranteed centering more, and guaranteed that bearing outer ring does not rotate with respect to its groove.In fact, the expansion coefficient of the steel of outer ring is 1.5 * 10
-5About, the expansion coefficient of the light alloy of housing is 2.3 * 10
-5About, and the expansion coefficient of compensating collar is 13 * 10
-5About.This axle collar expands much larger than the outer ring, and then has guaranteed good expansion compensation under the temperature of normal temperature and rising.
Particularly, the expansion of axle collar expansion ratio housing groove diametrically is faster, and is bonded in effectively among the latter, has avoided any rotation of bearing outer ring in housing, and guaranteed the centering between bearing and the groove, and thereby guaranteed centering between rotor and the stator.Last point is very important, because a motor properties especially depends on the gap that exists between stator and the rotor, the minimizing in gap can improve motor properties.As everyone knows, this gap is more little then just high more to the required precision of centering between rotor and the stator.
In application-specific, such as the motor that is used for automobile power-assisted direction (assisted direction), wherein these are required especially strictness, rotor must can not surpass 50 μ m with respect to the error of centralization of stator.So the present invention can satisfy these requirements.
In addition, in high temperature range, the structure of the axle collar can temporary transient be improved, and the axle collar can become soft and bigger ductility, and it can be to realize outer ring slight moving axially when bearing load.
By way of example, can select for use the following PA11 type polyamide of its mechanical features to make the axle collar:
Young's modulus is 2200MPa in the time of-20 ℃
-Poisson's coefficient is 0.4
-thermal expansion coefficient is 13 * 10
-5
Description of drawings
The present invention will make it more understandable by the explanation in embodiment's the detailed description and the accompanying drawings of the several non-limiting of back.
Fig. 1 is the view of motor axial component of the prior art,
Fig. 2 is the front view according to the bearing of one aspect of the present invention,
Fig. 3 is mounted in the view of the bearing axial component among Fig. 2 on the motor,
Fig. 4 and Fig. 5 are the details drawings of Fig. 3 under high temperature and low temperature condition respectively, and
Fig. 6 be illustrate the axial force that is applied on the bearing as the function of temperature so that the curve of bearing translation in its groove.
Embodiment
As can be seen from Figure 1, motor 1 comprises a housing 2 of being made by light alloy, and the axle 5 of rotor 4 is installed with 3, one rotors of housing 2 all-in-one-piece stators 4 with on it.Housing 2 comprises and is substantially the radial ringed part 7 that 6, one of columniform parts are positioned at column part 6 one ends, and an opposite end, location and be the radial component 8 of annular shape.
Because light alloy presents the expansion coefficient more much higher than steel, the special expansion coefficient more much higher than the outer ring of bearing 19, so be appreciated that in low temperature range, need sizable axial force to make outer ring translation in housing of bearing 19, in fact applying one on bearing may be to the disadvantageous axial load of described bearing.On the contrary, in high temperature range, excessive interval can be transformed by the rotation of outer ring with respect to housing by means of the internal drag distance of bearing 19.
For fear of the generation of this situation, will replace bearing 19 with bearing 21 as shown in Figure 3.Bearing 21 comprises a fixing interior ring 22 with annular bearing raceway 23, fixing outer ring 24 with annular bearing raceway 25, a scrolling series element 26, be ball in the case, it is arranged between bearing race 23 and 25, and keeps the circle spacing clocklike by the retainer of being made by composite 27.
In addition, outer ring 24 comprises an exterior cylindrical surfaces 32, wherein processes two narrow orifices 33 and 34, they be annular and with respect to radial plane symmetry through rolling element 26 centers, and can present the gabarit of U-shaped at axial section.Being installed in each narrow orifice 33,34 is respectively by composite, and such as the axle collar 35,36 that polyamide PA11 makes, they make the cylindrical outer surface 32 of outer ring 24 concordant substantially.
More particularly, each axle collar 35 and 36 has a cylindrical outer surface, and its external diameter deducts 50 μ m and outer ring 24 external diameters increase between the 20 μ m between the external diameter of outer ring 24.In order to finish above-mentioned target, with the axle collar 35 and 36 external diameters with respect to the tolerance of the nominal diameter of the described axle collar 35,36 outer surfaces be set in+10 μ m and-50 μ m between, described tolerance is preferably between+10 μ m and-30 μ m.
Also can be arranged to: the external diameter of outer ring with respect to the tolerance of its nominal diameter between 0 and-10 μ m.Therefore at ambient temperature, the axle collar 35 and 36 can not protrude in the outer surface 32 of external diameter 24, or outstanding very little, so that bearing can realize easily such as the press fit in the boring of the boring 14 of housing 2 axial ledge 13, and can not apply power or infringement to the axle collar 35,36.
The axle collar 35,36 is preferably by at groove 34 and 33 injection moldings and molded.In this manner, they can be outstanding slightly with respect to outer surface 32 behind injection molding, as shown in Figure 4, or caves in slightly, as shown in Figure 5.
In order to be beneficial to bearing 21 is installed in the boring 14 of axial ledge 13, described boring can have with respect to the tolerance of its nominal side between 0 to+16 μ m.This means bearing can easily be installed.
Give an example in passing, be less than or equal to the bearing of 50mm for external diameter, the tolerance that can suppose described external diameter is between 0 to-10 μ m, yet for the bearing of external diameter between 50 to 80mm, the tolerance that can suppose its described external diameter is between 0 to-50 μ m.
Fig. 6 illustrates and is applied to the situation of change of power under different temperatures that makes it mobile in the hole of axial ledge on the bearing, is formed with bearing groove on the axial ledge.This bearing nominal outside diameter is 32mm, and the external diameter tolerance provides maximum interference between the bearing of groove and tape spool ring.Therefore, this curve is one and goes out the envelope curver in a zone at abscissa and described curve limit, and is with respect to other curves of minor diameter interference more in this zone.
For the temperature that is lower than 0 ℃, contact is preponderated between the steel of the light alloy/bearing outer ring of housing, and for the temperature that is higher than 0 ℃, the contact of the light alloy/compensating collar of housing is preponderated.It is to be noted for being higher than 0 ℃ temperature axial load, and for the ambient temperature between 0 to 30 ℃, axial load is between 400 to 500N less than 500N.
Based on 20 ℃ temperature, load reduces as the function of temperature always, near being 80 ℃ in temperature, load less than 200N till.Be lower than 0 ℃ in temperature and locate, load reduces with more obvious gradient equally as the function of temperature always.
It will be appreciated that, because the present invention, can obtain a kind of various application that are suitable for, the bearing in machine field particularly, this bearing has compensating collar, this compensating collar can be not outstanding with respect to the outer surface of bearing outer ring when low temperature, making it can the press fit easily of calm strategical vantage point, and when high temperature, because sizable expansion of compensating collar can keep described press fit, the expansion that prevents groove is by separately changing into two rotations between the element, and the expansion of the expansion ratio bearing outer ring of its further groove is much bigger.
Therefore, motor can constitute with littler radial clearance, thereby and improves performance.Can avoid axial load excessive on the bearing equally, the latter is harmful to the life-span of bearing bracket stand, and has avoided equally prejudicial outer ring of the life-span of motor being rotated with respect to groove.
Claims (11)
1. a bearing means (21), comprise the outer ring (24) that in cylinder shape groove, to regulate, be arranged on the bearing race on the described outer ring, the a scrolling series element (26) that contacts and arrange with bearing race, with at least one expansion compensation axle collar (35), this axle collar is arranged in the annular narrow orifice (33) that the exterior cylindrical surfaces by the outer ring forms, the described axle collar is formed by the expansion coefficient material bigger than the expansion coefficient of the material that forms the outer ring, it is characterized in that the external diameter of the described axle collar deducts 50 μ m and the outer ring external diameter adds between the 20 μ m between the outer ring external diameter.
2. the device described in claim 1 is characterized in that, the external diameter of the axle collar with respect to the tolerance of nominal diameter between+10 and-50 μ m.
3. device as claimed in claim 1 or 2 is characterized in that, the external diameter of the axle collar with respect to the tolerance of nominal diameter between+10 and-30 μ m.
4. each described device as in the above-mentioned claim is characterized in that, the external diameter of outer ring with respect to the tolerance of nominal diameter between 0 and-10 μ m.
5. as each described device in the above-mentioned claim, it is characterized in that this device comprises two compensating collars (35,36), they are installed in two narrow orifices (33,34) of outer ring, and described narrow orifice is axially separated.
6. as each described device in the above-mentioned claim, it is characterized in that the outer ring is formed from steel.
7. as each described device in the above-mentioned claim, it is characterized in that the axle collar is made by composite.
8. mechanical component, comprise a groove that is provided with cylindrical bore and as above-mentioned claim in each described device, this device is installed in the described groove.
9. element as claimed in claim 8 is characterized in that this groove is made by light alloy.
10. element as claimed in claim 9 is characterized in that, this groove is by making based on the alloy of aluminium or magnesium.
11., it is characterized in that the thermal expansion coefficient of the axle collar is than the material coefficient of thermal expansion coefficient that constitutes bearing outer ring and to constitute the material coefficient of thermal expansion coefficient of groove of described outer ring big as each described element in the claim 8 to 10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0201371A FR2835580B1 (en) | 2002-02-05 | 2002-02-05 | ROLLING BEARING, ESPECIALLY FOR ELECTRIC MOTORS |
| FRFR0201371 | 2002-02-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1447038A true CN1447038A (en) | 2003-10-08 |
Family
ID=8871467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN03107582A Pending CN1447038A (en) | 2002-02-05 | 2003-02-05 | Rolling bearing esp. for dynamo |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP2003239957A (en) |
| KR (2) | KR20030066441A (en) |
| CN (1) | CN1447038A (en) |
| DE (1) | DE20301647U1 (en) |
| FR (1) | FR2835580B1 (en) |
| IT (1) | ITTO20030067A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322245C (en) * | 2004-07-30 | 2007-06-20 | 胡先根 | External positioning bearing |
| CN102570693A (en) * | 2010-12-10 | 2012-07-11 | 罗伯特·博世有限公司 | Motor provided with improved axial bearing |
| CN102889305A (en) * | 2011-07-22 | 2013-01-23 | Ntn-Snr轴承股份有限公司 | Assembling members using bearings to assemble rotating shaft in housing |
| CN103177922A (en) * | 2013-02-19 | 2013-06-26 | 北京中科科仪股份有限公司 | Centering device for electric microscope |
| CN103775495A (en) * | 2012-10-17 | 2014-05-07 | Skf公司 | Creep prevention device for ring of rolling bearing and bearing equipped therewith |
| CN104620004A (en) * | 2012-07-31 | 2015-05-13 | Skf公司 | Method for installing a first machine part into a second machine part |
| CN105074247A (en) * | 2013-03-28 | 2015-11-18 | 斯凯孚公司 | Bearing assembly and method for assembling and mounting said bearing assembly with a component supporting said bearing assembly |
| CN105074242A (en) * | 2013-03-28 | 2015-11-18 | 斯凯孚公司 | Bearing assembly and method for assembling and mounting said bearing assembly with a component supporting said bearing assembly |
| CN105673698A (en) * | 2014-12-05 | 2016-06-15 | 斯凯孚公司 | Temperature compensation ring, bearing ring, and bearing assembly |
| CN109488695A (en) * | 2017-09-11 | 2019-03-19 | 铃木株式会社 | Bearing cage structure and its manufacturing method |
| CN112272647A (en) * | 2018-06-20 | 2021-01-26 | 三菱电机株式会社 | Support structure of traction machine |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4446727B2 (en) * | 2003-12-17 | 2010-04-07 | Ｎｔｎ株式会社 | Hydrodynamic bearing device |
| DE102006054341A1 (en) * | 2006-11-17 | 2008-05-21 | Schaeffler Kg | Double angular ball bearing for storage of spindle of machine tool, has single-piece outer ring including radial inner lateral surface with radially and outwardly extending recess provided between shoulders of outer ring |
| DE102009005407A1 (en) * | 2009-01-19 | 2010-07-22 | Sms Meer Gmbh | rolling bearing unit |
| US10468942B2 (en) | 2014-04-23 | 2019-11-05 | Nsk Ltd. | Bearing device, conveying device, inspection device, and machine tool |
| CN106460936B (en) | 2014-04-23 | 2019-05-28 | 日本精工株式会社 | Direct drive motor, conveying device, check device and lathe |
| DE102021207590A1 (en) * | 2021-07-16 | 2023-01-19 | Aktiebolaget Skf | bearing ring |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2700581A (en) * | 1953-03-13 | 1955-01-25 | Aluminium Francais I | Precision fit for bearings and the like |
| JPH0329616Y2 (en) * | 1985-07-16 | 1991-06-24 | ||
| JP2924221B2 (en) * | 1991-03-05 | 1999-07-26 | 日本精工株式会社 | Resin composition for resin wound bearing |
| JP2001116052A (en) * | 1993-08-30 | 2001-04-27 | Nsk Ltd | Synthetic resin gear |
| JPH09269009A (en) * | 1996-03-29 | 1997-10-14 | Ntn Corp | Creep preventing roller bearing |
| JP4080014B2 (en) * | 1996-10-23 | 2008-04-23 | 株式会社ジェイテクト | Resin coated bearing |
| JPH10246238A (en) * | 1997-03-06 | 1998-09-14 | Ntn Corp | Rolling bearing and its attaching structure |
-
2002
- 2002-02-05 FR FR0201371A patent/FR2835580B1/en not_active Expired - Fee Related
-
2003
- 2003-02-03 JP JP2003026059A patent/JP2003239957A/en active Pending
- 2003-02-03 DE DE20301647U patent/DE20301647U1/en not_active Expired - Lifetime
- 2003-02-04 KR KR10-2003-0006694A patent/KR20030066441A/en not_active Application Discontinuation
- 2003-02-04 IT IT000067A patent/ITTO20030067A1/en unknown
- 2003-02-05 CN CN03107582A patent/CN1447038A/en active Pending
-
2004
- 2004-03-05 KR KR20-2004-0005961U patent/KR200363918Y1/en not_active IP Right Cessation
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322245C (en) * | 2004-07-30 | 2007-06-20 | 胡先根 | External positioning bearing |
| CN102570693A (en) * | 2010-12-10 | 2012-07-11 | 罗伯特·博世有限公司 | Motor provided with improved axial bearing |
| CN102889305A (en) * | 2011-07-22 | 2013-01-23 | Ntn-Snr轴承股份有限公司 | Assembling members using bearings to assemble rotating shaft in housing |
| CN104620004A (en) * | 2012-07-31 | 2015-05-13 | Skf公司 | Method for installing a first machine part into a second machine part |
| CN103775495B (en) * | 2012-10-17 | 2017-07-07 | Skf公司 | Creep preventing mean for rolling bearing circle and it is provided with the bearing of the device |
| CN103775495A (en) * | 2012-10-17 | 2014-05-07 | Skf公司 | Creep prevention device for ring of rolling bearing and bearing equipped therewith |
| CN103177922B (en) * | 2013-02-19 | 2015-12-02 | 北京中科科仪股份有限公司 | For the centralising device of electron microscope |
| CN103177922A (en) * | 2013-02-19 | 2013-06-26 | 北京中科科仪股份有限公司 | Centering device for electric microscope |
| CN105074242A (en) * | 2013-03-28 | 2015-11-18 | 斯凯孚公司 | Bearing assembly and method for assembling and mounting said bearing assembly with a component supporting said bearing assembly |
| CN105074247A (en) * | 2013-03-28 | 2015-11-18 | 斯凯孚公司 | Bearing assembly and method for assembling and mounting said bearing assembly with a component supporting said bearing assembly |
| CN105673698A (en) * | 2014-12-05 | 2016-06-15 | 斯凯孚公司 | Temperature compensation ring, bearing ring, and bearing assembly |
| CN105673698B (en) * | 2014-12-05 | 2022-04-29 | 斯凯孚公司 | Temperature compensating ring, bearing ring and bearing assembly |
| CN109488695A (en) * | 2017-09-11 | 2019-03-19 | 铃木株式会社 | Bearing cage structure and its manufacturing method |
| CN109488695B (en) * | 2017-09-11 | 2021-04-02 | 铃木株式会社 | Bearing part structure and manufacturing method thereof |
| CN112272647A (en) * | 2018-06-20 | 2021-01-26 | 三菱电机株式会社 | Support structure of traction machine |
| CN112272647B (en) * | 2018-06-20 | 2022-03-15 | 三菱电机株式会社 | Support structure of traction machine |
Also Published As
| Publication number | Publication date |
|---|---|
| ITTO20030067A1 (en) | 2003-08-06 |
| KR200363918Y1 (en) | 2004-10-07 |
| DE20301647U1 (en) | 2003-04-17 |
| KR20030066441A (en) | 2003-08-09 |
| FR2835580A1 (en) | 2003-08-08 |
| FR2835580B1 (en) | 2004-07-09 |
| JP2003239957A (en) | 2003-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1447038A (en) | Rolling bearing esp. for dynamo | |
| US9702403B2 (en) | Bearing assembly | |
| US8141445B2 (en) | Supporting structure of ball screw shaft | |
| JP5749329B2 (en) | Power steering system | |
| EP0762609B1 (en) | Compound ball bearing | |
| JP5031460B2 (en) | Wheel bearing device | |
| CN1456822A (en) | Double row radial thrust ball bearing | |
| CN1136649A (en) | Rolling bearing especial rear bearing of automobile ac generator | |
| CN1497192A (en) | Double row ball bearing and double row ball bearing preload applying method | |
| CN1667278A (en) | Centrifugal fan | |
| US9103373B1 (en) | Bearing-shaft assembly with bearing and method of attaching a bearing to a shaft | |
| EP2136090B1 (en) | Radial ball bearing | |
| US7628088B2 (en) | Ball screw mechanism | |
| US20170253117A1 (en) | Bearing structure and assembly method for same | |
| CN1769730A (en) | Support structure for rotating body | |
| CN1088163C (en) | Bearing structural body | |
| US9847694B2 (en) | Rotor of motor | |
| JP2007126087A (en) | Bearing device for wheel | |
| CN2849305Y (en) | Location device for steering pipe column bearing installation | |
| CN211139001U (en) | Electric drive device | |
| CN1923609A (en) | Bicycle pedal | |
| KR102556455B1 (en) | Wheel bearing assembly | |
| JP2007333125A (en) | Ball screw supporting structure | |
| KR101516800B1 (en) | Cage for ball bearing | |
| CN1926349A (en) | Hub unit for wheel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |