CN207005090U - Adaptive high-precision bearing face retaining element - Google Patents
Adaptive high-precision bearing face retaining element Download PDFInfo
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- CN207005090U CN207005090U CN201720603915.0U CN201720603915U CN207005090U CN 207005090 U CN207005090 U CN 207005090U CN 201720603915 U CN201720603915 U CN 201720603915U CN 207005090 U CN207005090 U CN 207005090U
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- bearing
- ring
- outer ring
- locking nut
- face
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Abstract
This patent discloses a kind of adaptive high-precision bearing face retaining element.It includes bearing inner race sphere back-up ring, bearing inner ring locking nut, bearing outer ring sphere back-up ring and bearing outer ring locking nut.Bearing inner race sphere back-up ring planar end surface is close to angular contact ball bearing inner ring end face, and convex spherical is bonded with the sphere of bearing inner ring locking nut, bearing inner ring locking nut and axis connection, realizes the fixation of diagonal contact ball bearing inner race.Bearing outer ring sphere back-up ring planar end surface is close to angular contact ball bearing outer ring end face, and convex spherical is bonded with the sphere of bearing outer ring locking nut, and bearing outer ring locking nut is connected with bearing block, realizes the fixation of diagonal contact ball bearing outer ring.This patent has advantage simple in construction, that adaptability is good, precision is high, on the high space remote sensing movable part of required precision, particularly with the angular contact bearing of Internal and external cycle separation, can more ensure bearing installation accuracy, and part process, economy are more preferable.
Description
Technical field
This patent is related to a kind of bearing element, and in particular to a kind of adaptive high-precision bearing face retaining element.
Background technology
In high-precision spatial movement mechanism, rely primarily on high-precision bearing and realize that accurately rotation is pointed to.But by
It is difficult to there is mismachining tolerance, the particularly perpendicularity of end face fixing nut end face and screw thread in axle, bearing block and end face fixing nut
To ensure, so traditional nut fixed form easily causes bearing to be beated precise decreasing after installing, rotated so as to influence shafting
Precision, so reduce bearing service life.This patent designs a kind of retaining element, optimizes the end face fixed form of bearing, ensures
Its bounce precision after installing.
The content of the invention
In order to solve above-mentioned problems of the prior art, this patent devises a kind of adaptive high-precision bearing end
Face retaining element.
Technical scheme is used by this patent：
A kind of adaptive high-precision bearing face retaining element, it includes bearing inner race sphere back-up ring 1, bearing inner race lock
Tight nut 2, bearing outer ring sphere back-up ring 3 and bearing outer ring locking nut 4, the part being engaged in addition have angular contact ball bearing 5,
Axle 6 and bearing block 7.
Described bearing inner race sphere back-up ring 1 is a stainless steel 2Cr13 back-up ring, and a side end face is plane, other side
For arc convex surface.
Described bearing inner ring locking nut 2 is a stainless steel 2Cr13 threaded ring, and trim ring inner circle has screw thread, cylindrical
Non-threaded, a side end face are plane, and other side is circular arc concave surface.
Described bearing outer ring sphere back-up ring 3 is a stainless steel 2Cr13 back-up ring, and a side end face is plane, other side
For arc convex surface.
Described bearing outer ring locking nut 4 is a stainless steel 2Cr13 threaded ring, and trim ring inner circle non-threaded is cylindrical
There is screw thread, a side end face is plane, and other side is circular arc concave surface.
In this patent, the planar end surface of bearing inner race sphere back-up ring 1 is close to the inner ring end face of angular contact ball bearing 5, convex spherical with
The sphere fitting of bearing inner ring locking nut 2, bearing inner ring locking nut 2 are threadedly coupled with axle 6, realize diagonal contact ball bearing
The fixation of 5 inner rings.The planar end surface of bearing outer ring sphere back-up ring 3 is close to the cycle surface of angular contact ball bearing 5, outside convex spherical and bearing
The sphere fitting of locking nut 4 is enclosed, bearing outer ring locking nut 4 is threadedly coupled with bearing block 7, realizes diagonal contact ball bearing 5
The fixation of outer ring.
The beneficial effect of this patent is：The bearing face retaining element both reliably secures bearing, further through manufacturability,
The more preferable structure of economy ensure that bearing bounce precision.
Brief description of the drawings
Fig. 1 is adaptive high-precision bearing face fixed structure assembling schematic diagram；In figure：1- bearing inner races sphere is kept off
Circle, 2- bearing inner ring locking nuts, 3- bearing outer ring sphere back-up rings, 4- bearing outer ring locking nuts, 5- be engaged in addition zero
Part has angular contact ball bearing, 6- axles, 7- bearing blocks.
Fig. 2 is bearing outer ring end face retaining element schematic diagram；In figure：A- bearing outer ring sphere back-up rings, B- bearing outer rings lock
Tight nut.
Fig. 3 is the spherical pair sketch that bearing face retaining element is formed；In figure：A- convex spherical bars, b- concave spherical surface bars.
Fig. 4 is bearing face retaining element force diagram；In figure：L- bearing outer rings, M- bearing outer ring sphere back-up rings, N- bearings
Outer ring locking nut.
Embodiment
1, accompanying drawing 2, accompanying drawing 3 and accompanying drawing 4 below in conjunction with the accompanying drawings, further illustrate, specific design is as follows to this patent：
1) bearing outer ring end face retaining element
Bearing outer ring end face retaining element includes bearing outer ring sphere back-up ring and bearing outer ring locking nut.Bearing outer ring ball
The no screw thread of the inside and outside circle of face back-up ring, there are 0.1mm or so gaps with bearing block, one side end face is plane, and end face is radius in addition
R convex spherical.Bearing outer ring locking nut inner circle non-threaded, cylindrical to have screw thread, one side end face is plane, and end face is half in addition
Footpath R concave spherical surface.Bearing outer ring sphere back-up ring and bearing outer ring locking nut composition spherical pair, can pass through sphere between the two
Pair is freely swung, so as to adapt to the position of bearing outer ring end face.
During component assembly, bearing outer ring sphere back-up ring can realize that adaptive condition is with bearing outer ring locking nut
Frictional force f between spherical pair is less than the component F of axial force F that bearing outer ring locking nut is screwed on sphere is tangentialT, i.e.,：
f<FT
I.e.：
Obtain：
Calculate, obtain according to coefficient of sliding friction u=0.3 between stainless steel：
R<3.48r
In formula：
R-spherical pair radius；
R-sphere back-up ring inside radius；
The axial force that F-bearing outer ring locking nut is screwed into；
Frictional resistance in f-spherical pair；
Coefficient of friction between μ-spherical pair；
2) bearing inner race end face retaining element
Bearing inner race end face retaining element includes bearing inner race sphere back-up ring and bearing inner ring locking nut.Bearing inner race ball
The no screw thread of the inside and outside circle of face back-up ring, there is 0.1mm or so gap with axle, one side end face is plane, and end face is radius R in addition
Convex spherical.The cylindrical non-threaded of bearing inner ring locking nut, inner circle have screw thread, and one side end face is plane, and end face is half in addition
Footpath R concave spherical surface.Bearing inner race sphere back-up ring and bearing inner ring locking nut composition spherical pair, can pass through sphere between the two
Pair is freely swung, so as to adapt to the position of bearing inner race end face.
During component assembly, bearing inner race sphere back-up ring can realize that adaptive condition is with bearing inner ring locking nut
Frictional force f ' between spherical pair is less than the component F of axial force F that bearing inner ring locking nut is screwed into ' on sphere is tangentialT',
With the calculating in 1), spherical pair radius R ' needs to meet with sphere back-up ring inside radius r '：
Calculate, obtain according to coefficient of sliding friction u=0.3 between stainless steel：
R′<3.48r′
3) precision analysis
It is described in detail by taking outer ring as an example:
It is assumed that bearing block and bearing outer ring gap value are 0.01mm, pairing bearing overall width is 25mm, bearing outside diameter Φ
80mm, the perpendicularity of bearing block inner face relative axis is 0.003mm.
A) outer ring is fixed using the bearing outer ring end face retaining element containing spherical pair, it is assumed that axis of thread opposite end
Face perpendicularity is 0.01mm, then bearing installation rear end face and run-out error incrementss are calculated as follows：
End face run-out error incrementss：
Because the bearing outer ring end face retaining element containing spherical pair is adapted to bearing outer ring position, extra mistake is not brought
Difference, so the end face run-out error incrementss of outer ring are the perpendicularity of bearing block inner face relative axis after bearing installation, i.e.,
0.003mm。
Run-out error incrementss：
Run-out error incrementss are 0.003*25/80mm, i.e. 0.0009mm
B) use common end face that outer ring is fixed for the bearing outer ring locking nut of plane, it is assumed that axis of thread phase
It is 0.01mm to end face squareness, then bearing installation rear end face and run-out error incrementss are calculated as follows：
End face run-out error incrementss：
After nut is screwed into, or bearing outer ring is forced along the bigger nut end face run-off the straight of error, so after bearing installation
The end face run-out error incrementss of outer ring are the perpendicularity of bearing lock nut end face opposite thread axis, i.e. 0.01mm.
Run-out error incrementss：
Run-out error incrementss are 0.01*25/80mm, i.e. 0.003mm.
To sum up：End face is carried out to bearing to fix, significantly improve the bounce precision after bearing installation using this patent part.
Claims (1)
1. a kind of adaptive high-precision bearing face retaining element, including bearing inner race sphere back-up ring (1), bearing inner ring locking
Nut (2), bearing outer ring sphere back-up ring (3) and bearing outer ring locking nut (4), the part being engaged in addition have angular contact ball axle
Hold (5), axle (6) and bearing block (7), it is characterised in that：
Described bearing inner race sphere back-up ring (1) is a stainless steel 2Cr13 back-up ring, and a side end face is plane, and other side is
Arc convex surface；
Described bearing inner ring locking nut (2) is a stainless steel 2Cr13 threaded ring, and trim ring inner circle has screw thread, cylindrical nothing
Screw thread, a side end face are plane, and other side is circular arc concave surface；
Described bearing outer ring sphere back-up ring (3) is a stainless steel 2Cr13 back-up ring, and a side end face is plane, and other side is
Arc convex surface；
Described bearing outer ring locking nut (4) is a stainless steel 2Cr13 threaded ring, and trim ring inner circle non-threaded is cylindrical to have
Screw thread, a side end face are plane, and other side is circular arc concave surface；
Described bearing inner race sphere back-up ring (1) planar end surface is close to angular contact ball bearing (5) inner ring end face, convex spherical and bearing
The sphere fitting of inner ring locking nut (2), bearing inner ring locking nut (2) are threadedly coupled with axle (6), realize diagonal contact ball axle
Hold the fixation of (5) inner ring；Bearing outer ring sphere back-up ring (3) planar end surface is close to angular contact ball bearing (5) cycle surface, convex spherical
It is bonded with the sphere of bearing outer ring locking nut (4), bearing outer ring locking nut (4) is threadedly coupled with bearing block (7), realization pair
The fixation of angular contact ball bearing (5) outer ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720603915.0U CN207005090U (en) | 2017-05-27 | 2017-05-27 | Adaptive high-precision bearing face retaining element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720603915.0U CN207005090U (en) | 2017-05-27 | 2017-05-27 | Adaptive high-precision bearing face retaining element |
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| Publication Number | Publication Date |
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| CN207005090U true CN207005090U (en) | 2018-02-13 |
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| CN201720603915.0U Active CN207005090U (en) | 2017-05-27 | 2017-05-27 | Adaptive high-precision bearing face retaining element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165940A (en) * | 2017-05-27 | 2017-09-15 | 中国科学院上海技术物理研究所 | A kind of adaptive high-precision bearing face retaining element |
-
2017
- 2017-05-27 CN CN201720603915.0U patent/CN207005090U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165940A (en) * | 2017-05-27 | 2017-09-15 | 中国科学院上海技术物理研究所 | A kind of adaptive high-precision bearing face retaining element |
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