CN2242992Y - Hollow roller bearing set with micro windage value - Google Patents
Hollow roller bearing set with micro windage value Download PDFInfo
- Publication number
- CN2242992Y CN2242992Y CN 94222356 CN94222356U CN2242992Y CN 2242992 Y CN2242992 Y CN 2242992Y CN 94222356 CN94222356 CN 94222356 CN 94222356 U CN94222356 U CN 94222356U CN 2242992 Y CN2242992 Y CN 2242992Y
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- bearing
- value
- roller
- outer ring
- hollow cylindrical
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Abstract
The utility model relates to a hollow roller bearing set with a micro-windage value, being especially suitable for the main shaft bearing of precise machines, such as printing machines, metal-cutting machine tools, etc. The utility model is a fully filled hollow cylindrical roller bearing without a holder, and is composed of an outer ring, an inner ring and a hollow cylindrical roller. The utility model is characterized in that set bearings have a micro-windage value, and the micro-windage value C of a basic unit equals to 0 subtracts 5 microns; each rolling channel on the rolling channel of the outer ring or the inner ring can be used for guiding the rolling of the hollow cylindrical roller by two raised edges; when the bearing is used, the recommended additional interference value delta addition of from 0.01 to 0.045 mm requires to be satisfied for mounting the machine.
Description
The utility model relates to a kind of roller bearing that is applicable to various rotary mechanisms, is specially adapted to the main shaft bearing of precision optical machineries such as printing machinery and metal-cutting machine tool.
Existing single-row and multiple row hollow cylindrical roller bearing, example U. S. Patent 3930693, Chinese patent GG86 209983 and 88 2007084 etc., though have advantages such as high rigidity, highi degree of accuracy, but their common shortcomings are bearings can not be complete when dispatching from the factory, can only supply with the user with the loose mail form, the coaxial inner ring raceway that finish grindes together when installation assembles again.If bearing is assembled into cover and dispatches from the factory, because hollow roller has big pre-interference value, the inner ring of bearing and outer ring size and shape will change, and become non-standard value.And bearing completed products can't carry out size and running accuracy inspection, and whether bearing is qualified can't judge.
Application number is " complete set of hollow roller bearing that small shrink value is arranged " patent of 92014154.3, steps to go a step further aspect addressing this problem.Yet when beginning production in 1992 and in the user, promoting this kind complete set of hollow roller bearing, find to exist following problem:
1, the original interference value of bearing (1-6 micron) overproof easily aborning (and after the bearing assembling, can't detect its interference value size), this error is except the measurement error and error of calculations of Internal and external cycle raceway and roller diameter size, thermal distortion (instant heating error) because of temperature variation produces is still arranged, the bearing outer ring ball track of example Φ 200 mm dias, when room temperature is changed to 1 ℃, its diameter dimension just has 2 microns variation, and for example when measuring roller diameter, measurement result is generally also changed because of the staff temperature, even under 20 ℃ of constant temperatures, three kinds of parts such as the Internal and external cycle of bearing and roller diameter are owing to deposit asynchronism(-nization) successively between constant temperature, also influential to size, total error that can cause the 4-5 micron that adds up.So control the interference value of bearing products, can only be by before the assembling diameter dimension and the result of calculation of three kinds of parts such as the Internal and external cycle of bearing and roller being carried out many people, repeatedly detect, are checked and solve.
For using hollow cylindrical roller bearing at a high speed, it requires the total interference value in installation back about 5 microns, and the overproof of the original interference value of bearing this moment will have very big influence to bearing performance.In addition, when customer requirements provides the true original interference value of every cover bearing, often can't satisfy.
2, so-called " small shrink value " bearing, it is small that the original interference value that is meant bearing is compared with the total interference value of bearing after its assembling.Yet for the total interference value after the hollow roller bearing requirement installation of higher speed is that (the Dn value is greater than 0.3 * 10 for the 5-10 micron
6The time take off limit value) time, the complete set of hollow roller bearing of small shrink value is inapplicable.Because if guarantee brearing bore and main shaft axle journal reliable interference fit is arranged, has original interference value and is 5 microns hollow roller bearing, total interference value of its assembling rear bearing will reach the 15-20 micron, this can make bearing produce very big heat when running up, to cause the bearing cisco unity malfunction.
3, on using, account for the hollow roller bearing that most biserials has small shrink value, because bearing needs to carry out (being commonly called as hot charging) after heating when assembling, roller easily produces crooked, and then stuck bearing phenomenon such as do not change, and brings very big inconvenience and difficulty in the use for the user.
Produce this phenomenon so cause, can analyze the crooked control action of roller by bearing outer ring ball track when interference value is arranged.As attached Figure 1 and Figure 2, if interference value is zero, then roller is that line contacts with raceway, and the gap between the roller raceway is zero everywhere; If during the crooked α of roller angle, be an oval part then along roller busbar cross-section and inside and outside raceway intersection, clearly inner ring raceway has only any to contact with roller, and inner ring is to the crooked no control action of roller.Bearing outer ring ball track and B only after the roller bus contacts
2The no interference of point, all the other each points all have interference value, and with B
1And B
3Point is for maximum.In other words i.e. raceway B on the A-A cross section
1' B
3' the raceway diameter less than α=0 o'clock, B
1, B
3The raceway diameter of point, promptly outer ring raceway has a control action to roller is crooked.
Just because of this, in the open circles roller bearing, can remove the centre rib of double row bearing, as Chinese patent GG88200708.4,88216590.9 and application number is the two rib structures that all adopted no centre rib in 93104154.3 " complete set of hollow roller bearing with small shrink value " patent, yet complete set of hollow roller bearing is in when assembling, is filled on the main shaft axle journal after generally adopting integral body to be heated to 80-100 ℃.Because main shaft is cold, thus the very fast decline of suit rear bearing inner ring temperature, and make the gap that occurs 0.10-0.20 millimeter (being the 100-200 micron) in the bearing.As shown in Figure 3, under action of gravity, the outer ring is sagging, and the Lower Half roller tumbles and bears against together each other, thereby bigger circumferential clearance H (the circumferential clearance h between roller concentrates in together) occurs on bearing top.Under the situation of biserial hollow roller raceway control outside losing, produce crookedly under action of gravity, have than H place, big circumference gap, an end face of roller can be skewed off in another row raceway, strengthens thereby the roller angle of inclination is being shown, as shown in Figure 4.When bearing roller and outer ring temperature cool to room temperature, not only recovered the original interference value of bearing, and obtained additional interference value owing to bearing hole assembles with the interference of axle.Because it is very big crooked that roller has produced, the control action of outer ring raceway makes roller B
1, B
3Part produces very big distortion, thereby makes roller stuck, and bearing can't rotate.
Stuck for preventing roller, bearing constantly rotates the outer ring by the assembler in the hot charging process at present, tilts to correct roller, is cooled to radial clearance less than till zero up to bearing.This process needs 20 minutes approximately, so the user installation use is very inconvenient, and urgent hope improves.
Same in transportation process with small shrink value bearing, also very difficult with the hand rotation because vibration also can cause the crooked phenomenon of above-mentioned roller though incidence rate is less, and often think that bearing is a waste product.
4, owing to the bearing completed products friction torque with interference value is big, when doing the running accuracy inspection, the workman rotates very hard.Particularly, rotate difficulty especially to the bearing of original interference value at the 4-6 micron.Theoretically, it is possible that this class bearing is done the running accuracy inspection, but in the middle of producing in batches, is impracticable to the check of this finished product bearing.
5, when bearing adopts grease lubrication, owing to be full dress roller, the circumferential clearance between roller is little, so the space of bearing internal memory grease is also just little.When roller and raceway were line and contact, roller will squeeze out grease when rolling, and therefore petrol starvation often takes place at the bearing race middle part in the running, caused raceway burn gummed.So having the hollow cylindrical roller bearing of small shrink value, existing biserial only is suitable for using oil lubrication.
Owing to have above-mentioned shortcoming and problem, have many advantages although have the complete set of hollow roller bearing of small shrink value, but come a lot of inconvenience and difficulty for user and factory, and use occasion also is restricted, the purpose of this utility model just is to overcome and solve above-mentioned shortcoming, provide a kind of and have excellent performance, be easy to promote, be convenient to organize the hollow cylindrical roller bearing of batch process.
The purpose of this utility model is achieved in that
A kind of complete set of hollow roller bearing with small play value, formed by outer ring, inner ring and hollow cylindrical roller, it is characterized in that complete bearing has small play value, the play value C=0-5 micron that it is basic, on outer ring or the inner ring raceway every row raceway by two ribs as the rolling of hollow cylindrical roller guiding, and bearing should to satisfy the additional interference value Δ of installation of 0.01-0.045 millimeter of recommendation in use attached.
This hollow cylindrical roller bearing except, tolerance range little in the play value is tight, is the same with general bearing.Therefore, on producing, bring great convenience, and bearing can carry out 100% check to the play value of finished product after assembling.All play value failures can return the mounting shop and match again.(is that the play value is special-purpose play value Δ when the user need provide the actual play value of every cover bearing and the play value need be provided greater than 5 microns special play group bearing
1), factory all can easily satisfy.
The installation of hollow cylindrical roller bearing adds the interference value Δ
AttachedDetermine, the data that the hollow roller bearing sample that is provided according to Bearing Factory by the Machinery Design personnel is recommended, in conjunction with the machine operating mode and require fixed, and then definite journal size (a few cases axle journal is the housing aperture).
Δ
Attached=Δ
Always+ C
In the formula: Δ
Always---the total interference value (taking absolute value) after the bearing installation
The play value (taking absolute value) of C---complete set of hollow roller bearing
Δ
Always=2 Δs
Roller=2P
Volume/ G
Directly
Wherein: Δ
Roller---with maximum rated load P
VolumeThe pre-interference value of corresponding roller
G
Directly---the radially quiet rigidity of bearing
The P that provides according to the bearing sample
VolumeAnd G
DirectlyCan calculate Δ
Always, can increase or reduce P according to the machine operating mode
VolumeNumerical value.
Though bearing Δ for high quick-action commentaries on classics
AlwaysVery little, but with play value sum be Δ
Attached, axle and bearing hole are reached reliably cooperate; Work as Δ
AlwaysAlso can order the complete set of hollow roller bearing of big play group when too big.
Crooked for preventing biserial hollow roller roller in assembling and transportation process, on raceway, increased centre rib, form two row raceways.The axial clearance of roller and two ribs is the 0.05-0.15 millimeter, and every row roller is all by two lip-guideds.Do the time spent when outer ring raceway to roller is out of hand like this, crooked, the stuck phenomenon of roller can not take place in the roller lip-guided.
For improving the bearing lubrication condition, increased oil duct 6 at centre rib 4 and both sides rib place, and on centre rib, have lubricatedly with circular groove 5 and oil through 8, increased on oil storage space 9 between the two row rollers and the raceway path (seeing accompanying drawing 5) of two oil storage ditches 6 and supplemental lubrication grease like this.The size of circular groove and oil through quantity and size are decided by bearing size and requirement.
Advantage of the present utility model:
1, overcome that the original interference value of existing complete set of hollow roller bearing can't be measured and frequent overproof shortcoming, best interference value and service behaviour when having guaranteed bearing working.
The specific bearing of big interference value is arranged in the time of 2, will working, have small play value when being designed to product export, this just makes the same with plain bearing.Thereby producing, assembling and checking and use technology, instrument and equipment first-class identical with the highi degree of accuracy plain bearing, this had both guaranteed bearing quality, was beneficial to the batch process of bearing again.
4, enlarged the application of complete set of hollow roller bearing significantly, for example at a high speed and higher speed running occasion, in the application aspect the grease lubrication occasion.
5, overcome the existing complete set of hollow roller bearing stuck key issue that can not change of the crooked bearing that causes of roller in assembling and transportation, for applying of complete set of hollow roller bearing cleared away obstacle.
6, behind the increase centre rib,, outer ring rigidity is increased for bearing outer ring has increased annular muscle together.Thereby install on the main shaft axle journal and after bearing has increased the assembling magnitude of interference at bearing, the assembling interference value is mainly born by the distortion of hollow roller, and race deformation just reduces like this, and favourable bearing is toward the interior assembling of box body hole.
Figure of description:
Fig. 1 is the hollow cylindrical roller bearing of prior art, and roller is crooked, stuck not to be changeed
Analyzing chart for reason.
Fig. 2 is the A-A sectional view of Fig. 1
Fig. 3 is bearing crooked increasing situation map when hot charging
Fig. 4 takes down unfolded drawing behind the outer ring for Fig. 3
One of Fig. 5 the utility model embodiment
Fig. 6 is the new embodiment's of this practicality two
Embodiment:
Embodiment one, and as shown in Figure 5, for being used for the complete biserial hollow cylindrical roller bearing of the small play value of having of printing machinery drum, external diameter is 210 millimeters of Φ, 140 millimeters of internal diameter Φ, 60 millimeters of width.Inner ring 1 is no rib structure, and outer ring 2 is the biserial raceway, is made of two outer ribs 10 and centre rib 4, and hollow cylindrical roller 3 external diameters are 15 millimeters of Φ, hollowness 70%, and 22 millimeters of length, every row roller number is 36.It is the 0-5 micron that the apolegamy bearing makes its play.The axial clearance of roller and raceway is the 0.08-0.15 millimeter.The additional magnitude of interference of recommending of bearing installation is 0.035 ± 0.005 millimeter, and the radius of annular oil groove 5 is R6, and the diameter of oilhole 8 is 2 millimeters of Φ, has 4, and 6 is oil duct, and 7 is play, the C=0.0025=0.0025 millimeter, and 9 is oil storage space.
Embodiment two: as shown in Figure 6, it is used for the bistrique of internal grinding machine, be a kind of single-row hollow cylindrical roller bearing of high speed that small play value is arranged, external diameter is 62 millimeters of Φ, 30 millimeters of internal diameter Φ, 16 millimeters of width, the hollow cylindrical roller external diameter is 8 millimeters of Φ, and hollowness 70%, length are 9 millimeters, inner ring is two ribs, and the outer ring is no rib structure.Owing to run up, the bearing interference value is very little, so select special play Δ for use
1=0.008 ± 0.002 millimeter, the installation of recommendation adds the magnitude of interference Δ
Attached=0.014 ± 0.002 millimeter.Axial clearance between roller and raceway is the 0.008-0.12 millimeter.
Claims (7)
1, a kind of complete set of hollow roller bearing that small play value is arranged, form by outer ring, inner ring and hollow cylindrical roller, it is characterized in that complete bearing has small play value, every row raceway is guided as the rolling of hollow cylindrical roller by two ribs on its play value C=0-5 micron, outer ring or inner ring raceway of organizing substantially, and bearing should satisfy the additional interference value Δ of installation of the 0.01-0.045 millimeter of recommendation in use
Attached
2, bearing according to claim 1 is characterized in that bearing can select the special-purpose play value Δ that surpasses basic play value for use
1
3, bearing according to claim 1 and 2 should satisfy when it is characterized in that the bearing use and recommend the additional interference value Δ of installation
AttachedAdd the mean value of special-purpose play value.
4, bearing according to claim 1 is characterized in that middle part, double row bearing outer ring has annular oil groove and oil through.
5,, it is characterized in that annular oil groove size R in the double row bearing outer ring and oil through diameter and quantity decides according to bearing size and requirement according to claim 1 or 4 described bearings.
6, bearing according to claim 1 is characterized in that the raceway number on outer ring or the inner ring is a biserial or single-row.
7, bearing according to claim 1 is characterized in that the biserial hollow cylindrical roller bearing can use grease lubrication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94222356 CN2242992Y (en) | 1994-09-28 | 1994-09-28 | Hollow roller bearing set with micro windage value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94222356 CN2242992Y (en) | 1994-09-28 | 1994-09-28 | Hollow roller bearing set with micro windage value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2242992Y true CN2242992Y (en) | 1996-12-18 |
Family
ID=33836390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94222356 Expired - Fee Related CN2242992Y (en) | 1994-09-28 | 1994-09-28 | Hollow roller bearing set with micro windage value |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2242992Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239338A (en) * | 2008-12-05 | 2011-11-09 | 谢夫勒科技有限两合公司 | Inner race of a rolling bearing |
| CN102308107A (en) * | 2009-02-10 | 2012-01-04 | 通力股份公司 | Method for installing a double bearing in a casting, wheel comprising a double bearing, and joint with double bearing |
| CN105946998A (en) * | 2016-05-11 | 2016-09-21 | 靖江威尔通信技术有限公司 | Structure and installing process of supporting wheel shaft for farm machinery |
-
1994
- 1994-09-28 CN CN 94222356 patent/CN2242992Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239338A (en) * | 2008-12-05 | 2011-11-09 | 谢夫勒科技有限两合公司 | Inner race of a rolling bearing |
| CN102239338B (en) * | 2008-12-05 | 2013-07-31 | 谢夫勒科技股份两合公司 | Inner race of a rolling bearing |
| CN102308107A (en) * | 2009-02-10 | 2012-01-04 | 通力股份公司 | Method for installing a double bearing in a casting, wheel comprising a double bearing, and joint with double bearing |
| CN102308107B (en) * | 2009-02-10 | 2014-07-09 | 通力股份公司 | Method for installing a double bearing in a casting, wheel comprising a double bearing, and joint with double bearing |
| CN105946998A (en) * | 2016-05-11 | 2016-09-21 | 靖江威尔通信技术有限公司 | Structure and installing process of supporting wheel shaft for farm machinery |
| CN105946998B (en) * | 2016-05-11 | 2018-09-28 | 靖江威尔通信技术有限公司 | The structure and mounting process of farm machinery supporting wheel shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |